SPACER ARRANGEMENT FOR A MOUNTING COMPARTMENT OF A RAIL VEHICLE AND METHOD FOR INSTALLING A DRAFT GEAR AND A SPACER ARRANGEMENT IN A MOUNTING COMPARTMENT

Abstract

A spacer arrangement (300) is configured to be fitted into a mounting compartment of a rail vehicle in order to bridge a gap distance between an innermost portion of a draft gear (200) and at least one support surface of the mounting compartment. The spacer arrangement (300) has two opposing side members (312; 313) configured to transfer buff forces exerted on the draft gear (200) to the at least one support surface of the mounting compartment. The spacer arrangement (300) is configured to contact a respective side wall of the mounting compartment, each of which side wall is perpendicular to the at least one support surface of the mounting compartment. The spacer arrangement (300) contains at least one pressure device (302) positioned between the two opposing side members (312; 313), which at least one pressure device (302) applies a pretension force between the two opposing side members (312; 313) to reduce the risk that these members buckle in case of an extreme buff force on the draft gear (200).

Claims

1. A spacer arrangement (300) configured to be fitted into a mounting compartment (110) of a rail vehicle in order to bridge a gap distance (d) between an innermost portion (205) of a draft gear (200) and at least one support surface (111a; 111b) of the mounting compartment (110), which spacer arrangement (300) comprises: two opposing side members (312; 313) configured to: transfer buff forces exerted on the draft gear (200) to the at least one support surface (111a; 111b) of the mounting compartment (110), and contact a respective side wall (112; 113) of the mounting compartment (110), which side walls (112; 113) each is perpendicular to the at least one support surface (111a; 111b) of the mounting compartment (110), wherein the spacer arrangement (300) comprises: at least one pressure device (301, 302; 601; 701, 702, 703; 801, 802, 803, 804) positioned between the two opposing side members (312; 313) and configured to apply a pretension force between the two opposing side members (312; 313).

2. The spacer arrangement (300) according to claim 1, wherein the at least one pressure device (301, 302; 601; 701, 702, 703; 801, 802, 803, 804) is fixed to each of the two opposing side members (312; 313).

3. The spacer arrangement (300) according to claim 2, wherein the at least one pressure device (301, 302; 601; 701, 702, 703; 801, 802, 803, 804) is configured to apply the pretension force in an attracting direction pulling the two opposing side members (312; 313) towards one another and away from the side walls (112; 113) of the mounting compartment (110).

4. The spacer arrangement (300) according to claim 1, wherein the at least one pressure device (301, 302; 601; 701, 702, 703; 801, 802, 803, 804) is configured to apply the pretension force in a repelling direction pushing the two opposing side members (312; 313) away from one another and against side walls (112; 113) of the mounting compartment (110).

5. The spacer arrangement (300) according to claim 1, comprising: at least two pressure devices (301, 302; 601, 602, 603; 701, 702, 703, 704) that are positioned between the two opposing side members (312; 313) at respective contact areas (331, 333; 332, 334) in a respective inner wall surface (342, 343) of each of the two opposing side members (312; 313), which respective contact areas (331, 333; 332, 334) are located relative to one another such that the pretension force is evenly distributed over the two opposing side members (312; 313).

6. The spacer arrangement (300) according to claim 1, wherein each of the two opposing side members (312; 313) comprises: a respective first ridge/groove interface (352; 353) configured to be connected to a respective second ridge/groove interface (412, 413) of the innermost portion (205) of the draft gear (200).

7. The spacer arrangement (300) according to claim 6, wherein each of the respective first ridge/groove interfaces comprises: a ridge member (352; 353) configured to be inserted into a groove member (412, 413) of a respective expanding mounting device (402; 403) of the innermost portion (205) of the draft gear (200), and/or a groove member configured to receive a ridge member of the expanding mounting device (402;

403) of the innermost portion (205) of the draft gear (200).

8. The spacer arrangement (300) according to claim 1, further comprising a set of mounting members (362; 363) configured to hold the spacer arrangement (300) in the mounting compartment (110).

9. The spacer arrangement (300) according to claim 8, wherein: a first mounting member (362) in the set of mounting members (362; 363) is adapted to lock a position of a first one (312) of the two opposing side members relative to a first side wall (112) of the mounting compartment (110), and a second mounting member (363) in the set of mounting members (362; 363) is adapted to lock a position of a second one (313) of the two opposing side members relative to a second side wall (113) of the mounting compartment (110).

10. The spacer arrangement (300) according to claim 1, wherein at least one of the two opposing side members (312; 313) comprises at least one weight-reducing cavity (431, 432, 433, 434, 435, 436).

11. The spacer arrangement (300) according to claim 1, wherein the at least one pressure device (301, 302; 601; 701, 702, 703; 801, 802, 803, 804) comprises at least one of: a screw member contacting each of the two opposing side members (312, 313), which screw member is configured to apply a repelling or an attracting force between the two opposing side members, a worm gear arrangement contacting each of the two opposing side members, which worm gear arrangement is configured to apply a repelling or an attracting force between the two opposing side members (312, 313), and a cam-spring arrangement contacting each of the two opposing side members, which cam-spring arrangement is configured to apply a repelling or an attracting force between the two opposing side members (312, 313).

12. Method for installing a draft gear (200) and the spacer arrangement (300) according to claim 1 in a mounting compartment (110) of a rail vehicle, the method comprising: placing the spacer arrangement (300) in the mounting compartment (110) such that a respective first short side (382; 383) of each of the two opposing side members (312, 313) contacts the at least one support surface (111a; 111b) of the mounting compartment (110), fastening the spacer arrangement (300) to first and second side walls (112; 113) of the mounting compartment (110) via a set of mounting members (362; 363), wherein: positioning the draft gear (200) in the mounting compartment (110) such that an innermost portion (205) of the draft gear (200) contacts a respective second short side (392; 393) of each of the two opposing side members (312, 313), which second short sides (392; 393) are located on respective opposite sides of the opposing side members (312, 313) relative to said first short sides (382; 383); connecting the innermost portion (205) of the draft gear (200) to the second short sides (392; 393) of the two opposing side members (312, 313); and adjusting the at least one pressure device (301, 302; 601; 701, 702, 703; 801, 802, 803, 804) to apply a pretension force between the two opposing side members (312; 313).

13. The method according to claim 12, wherein the second short sides (392; 393) of the two opposing side members (312, 313) comprises a respective first ridge/groove interface (352; 353, the innermost portion (205) of the draft gear (200) comprises a second ridge/groove interface (412, 413) configured to be fitted into the respective first ridge/groove interface (352; 353), and the connecting of the innermost portion (205) of the draft gear (200) to the second short sides (392;

393) of the two opposing side members (312, 313) comprises: fitting the first and second ridge/groove interfaces (352, 353; 412, 413) into one another.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The invention is now to be explained more closely by means of preferred embodiments, which are disclosed as examples, and with reference to the attached drawings.

[0020] FIG. 1 shows a mounting compartment according to one embodiment of the invention;

[0021] FIG. 2 shows a mounting compartment of FIG. 1 in which a draft gear and a spacer arrangement according to one embodiment of the invention have been installed;

[0022] FIGS. 3a-c illustrate the spacer arrangement according to a first embodiment of the invention;

[0023] FIGS. 4a-c illustrate expansion elements being connected to the proposed spacer arrangement according to one embodiment of the invention;

[0024] FIG. 5 shows a draft gear that is connected to the spacer arrangement of FIGS. 3a-c by means of expansion elements;

[0025] FIG. 6 illustrates the spacer arrangement according to a second embodiment of the invention;

[0026] FIG. 7 illustrates the spacer arrangement according to a third embodiment of the invention;

[0027] FIG. 8 illustrates the spacer arrangement according to a fourth embodiment of the invention; and

[0028] FIG. 9 illustrates, by means of a flow diagram, the general method according to the invention for installing a draft gear and the proposed spacer arrangement in a mounting compartment.

DETAILED DESCRIPTION

[0029] FIG. 1 schematically illustrates a rail vehicle 100 having a mounting compartment 110 into which a spacer arrangement 300 according to the invention is installable. FIG. 2 shows the mounting compartment 110 of FIG. 1 in which a draft gear 200 and a spacer arrangement 300 according to one embodiment of the invention have been installed.

[0030] The main purpose of the spacer arrangement 300 according to the invention is to bridge a gap distance d between an innermost portion 205 of the draft gear 200 and at least one support surface of the mounting compartment 110. FIG. 1 shows two such support surfaces in the form of 111a and 111b respectively. Naturally, as one alternative, a single unbroken wall may for example constitute the support surface of the mounting compartment 110.

[0031] Referring now also to FIGS. 3a, 3b and 3c, which illustrate a spacer arrangement according to a first embodiment of the invention, the spacer arrangement 300 contains two opposing side members 312 and 313 respectively and at least one pressure device 301 and 302 respectively.

[0032] The two opposing side members 312 and 313 are configured to transfer buff forces exerted on the draft gear 200 to the at least one support surface 111a and 111b of the mounting compartment 110. To this aim, each of the two opposing side members 312 and 313 is configured to contact a respective side wall 112 and 113 of the mounting compartment 110, and each of the two opposing side members 312 and 313 is oriented with its respective long sides parallel to the side walls 112 and 113, which each is perpendicular to the at least one support surface 111a and 111b of the mounting compartment 110.

[0033] Specifically, a respective first short side 382 and 383 of each of the two opposing side members 312 and 313 is adapted to contact the at least one support surface 111a and 111b respectively of the mounting compartment 110, and a respective second short side 392 and 393 of each of the two opposing side members 312 and 313 is adapted to contact the innermost portion 205 of a draft gear 200, which may be represented by an expansion element as will be discussed below. Thereby, when the spacer arrangement 300 is fitted into the mounting compartment 110 as shown in FIG. 2, any buff forces exerted on the draft gear 200 are transferred via the spacer arrangement 300 to the at least one support surface 111a and 111b of the mounting compartment 110.

[0034] In order to reduce the risk that the spacer arrangement 300 buckles, or by other means is plastically deformed, due to the buff forces the spacer arrangement 300 includes at least one pressure device that is positioned between the two opposing side members 312 and 313, and which at least one pressure device is configured to apply a pretension force between the two opposing side members 312 and 313. FIGS. 3a-3c exemplify the at least one pressure device by a pair of screw members 301 and 302 contacting each of the two opposing side members 312 and 313. As will be discussed below with reference to FIGS. 6, 7 and 8 other numbers of pressure devices are also conceivable according to embodiments of the invention.

[0035] The pretension applied by the at least one pressure device, which may either produce a repelling or an attracting force between the two opposing side members 312 and 313, increases the overall rigidity of the spacer arrangement 300 and thus reduces the risk of deformation thereof.

[0036] According to one embodiment of the invention, the at least one pressure device 301 and 302 is fixed to each of the two opposing side members 312 and 313, for example as illustrated in FIG. 3b by means of threaded holes 331 and 332 through the side member 313 into which threaded holes 331 and 332 the pressure devices 301 and 302 respectively are screwed in.

[0037] Such fixation of the pressure devices 301 and 302 is necessary if these devices are configured to apply the pretension force in an attracting direction wherein the two opposing side members 312 and 313 are pulled towards one another and away from the side walls 112 and 113 of the mounting compartment 110.

[0038] Even though, for practical reasons, it may be generally advantageous to fix the at least one pressure device 301 and 302 to the two opposing side members 312 and 313 this is not actually needed if the at least one pressure device 301 and 302 is configured to apply the pretension force in a repelling direction wherein the two opposing side members 312 and 313 are pushed away from one another and against the side walls 112 and 113 of the mounting compartment 110. Namely, in this case, it is possible that the spacer arrangement 300 is held in position in the mounting compartment 110 by the static friction between the outer sides of the two opposing side members 312 are 313 and the side walls 112 and 113.

[0039] FIGS. 4a, 4b and 4c illustrate one embodiment of the invention, wherein the two opposing side members 312 and 313 respectively of the spacer arrangement 300 are configured to be connected to expansion elements 402 and 403, which, in turn, are arranged to be connected to the innermost portion 205 of the draft gear 200.

[0040] Preferably, each of the expansion elements 402 and 403 has a double wedge-shaped profile adapted to be fitted into a respective concave profile of the innermost portion 205 of the draft gear 200 as shown in FIG. 5. Thus, after fitting the expansion element 403 into the concave profile of the innermost portion 205 of the draft gear 200, the expansion element 403 may be clamped into fixation against said innermost portion 205 by adjusting an expansion bolt 473 between two pieces of the double wedge-shaped profile, which expansion bolt 473 is configured to control the mutual distance between said two pieces.

[0041] To secure the expansion elements 402 and 403 to the spacer arrangement 300, according to one embodiment of the invention, each of the two opposing side members 312 and 313 contains a respective first ridge/groove interface 352 and 353 as illustrated in FIG. 3c. The first ridge/groove interface 352 and 353 is configured to be connected to a respective second ridge/groove interface 412 and 413 of the innermost portion 205 of the draft gear 200, which in FIGS. 4a and 4b is exemplified by the above-described expansion elements 402 and 403.

[0042] Each of the respective first ridge/groove interfaces 352 and 353 may contain the ridge member 352 and 353 respectively, which is configured to be inserted into the groove member 412 and 413 respectively of the respective expanding mounting device 402 and 403 of the innermost portion 205 of the draft gear 200. Alternatively, or in addition thereto, each of the respective first ridge/groove interfaces may 352 and 353 contain a groove member, which is configured to receive a ridge member of the expanding mounting devices 402 and 403 respectively of the innermost portion 205 of the draft gear 200. Thus, by interconnection through one or more pairs of ridges and grooves of the ridge/groove interfaces 352 and 353, each of the expansion elements 402 and 403 is fastened to the two opposing side members 312 and 313 of the spacer arrangement 300.

[0043] FIG. 4c illustrates one embodiment of the invention where at least one of the two opposing side members 313 includes at least one cavity, here exemplified by 431, 432, 433, 434, 435 and 436 respectively, which has a weight-reducing function. I.e. material has been removed from the side member 313 to lower its weight, for example by drilling one or more holes through the side member 313. However, of course, alternative means of reducing the weight of the spacer arrangement 300 are conceivable according to embodiments of the invention, such as drilling/milling one or more recesses in at least one of the two opposing side members 312 and 313 and/or manufacturing these structural elements in framework technology.

[0044] FIG. 6 illustrates a second embodiment according to the invention, where the spacer arrangement 300 contains a single pressure device in the form of a screw member 601 between the two opposing side members 312 and 313. To distribute the pretension force as evenly as possible over the two opposing side members 312 and 313, the screw member 601 is preferably positioned such that it contacts respective central areas of the inner walls of the two opposing side members 312 and 313.

[0045] FIG. 7 illustrates the spacer arrangement 300 according to a third embodiment of the invention, where instead three pressure devices in the form of screw members 701, 702 and 703 are arranged between the two opposing side members 312 and 313. Analogous to the above, the screw members 701, 702 and 703 are preferably positioned such that they contact different respective areas of the inner walls of the two opposing side members 312 and 313 so that the overall pretension force is distributed as evenly as possible over the two opposing side members 312 and 313. For example, this may mean that first and third screw members 701 and 703 respectively are arranged relatively close first and second short sides and close to a first long side of each of the two opposing side members 312 and 313, and a second screw member 702 is arranged close to a midpoint of a second long side of each of the two opposing side members 312 and 313.

[0046] FIG. 8 illustrates the spacer arrangement 300 according to a fourth embodiment of the invention, where four pressure devices in the form of screw members 801, 802, 803 and 804 respectively are arranged between the two opposing side members 312 and 313. Again, the screw members 801, 802, 803 and 804 are preferably arranged so that to the overall pretension force is distributed as evenly as possible over the two opposing side members 312 and 313. Thus, each of the screw members 801, 802, 803 and 804 may contact a respective area of the inner walls of the two opposing side members 312 and 313, which respective area is close to a particular one of the corners of the two opposing side members 312 and 313.

[0047] In the light of the above, it should however be noted that it may also be advantageous to arrange the pressure devices somewhat differently to allow room for one or more parts of the draft gear 200 to move between the two opposing side members 312 and 313 when absorbing buff forces from the coupler.

[0048] Moreover, according to embodiments of the invention, one or more of the above screw members may be replaced by an alternative pressure device, such as worm gear arrangement or a cam-spring arrangement contacting each of the two opposing side members, which alternative pressure device contacts each of the two opposing side members 312 and 313 and is configured to apply either a repelling or an attracting force between the two opposing side members 312 and 313.

[0049] Referring now to all the FIGS. 2 to 8, according to embodiments of the invention, the spacer arrangement 300 contains a set of mounting members 362 and 363 respectively, which are configured to hold the spacer arrangement 300 in the mounting compartment 110. Preferably, each mounting member 362 and 363, in turn, includes at least one screw configured to be screwed to a beam or similar structural element near the mounting compartment 110. Specifically, a first mounting member 362 may be adapted to lock a position of a first one 312 of the two opposing side members relative to a first side wall 112 of the mounting compartment 110, and a second mounting member 363 may be adapted to lock a position of a second one 313 of the two opposing side members relative to a second side wall 113 of the mounting compartment 110 as shown in FIG. 2.

[0050] The mounting members 362 and 363 are beneficial because they facilitate installing the spacer arrangement 300 in the mounting compartment 110. The mounting members 362 and 363 also hold the spacer arrangement 300 in place in the desired position in the mounting compartment 110 after installation.

[0051] FIG. 9 illustrates, by means of a flow diagram, the general method according to the invention for installing a draft gear and the proposed spacer arrangement 300 in a mounting compartment 110 of a rail vehicle.

[0052] In a first step 910, the spacer arrangement 300 is placed in the mounting compartment 110. In a step 920 thereafter, it is checked if a respective first short side 382 and 383 of each of the two opposing side members 312 and 313 contacts the at least one support surface 111a and 111b of the mounting compartment 110. If so, a step 930 follows; and otherwise, the procedure loops back to step 910.

[0053] In step 930, the spacer arrangement 300 is fastened to first and second side walls 112 and 113 of the mounting compartment 110, for example via a set of mounting members 362 and 363.

[0054] Then, in step 940, the draft gear 200 is positioned in the mounting compartment 110. Subsequently, in a step 950, it is checked if the draft gear 200 is in adequate contact with the spacer arrangement 300. If so, a step 960 follows; and otherwise, the procedure loops back to step 940. For example, adequate contact may mean that an innermost portion 205 of the draft gear 200 contacts a respective second short side 392 and 393 of each of the two opposing side members 312 and 313, which second short sides 392 and 393 are located on respective opposite sides of the opposing side members 312 and 313 relative to said first short sides 382 and 383.

[0055] In step 960, the draft gear 200 is fixed to the spacer arrangement 300 by connecting the innermost portion 205 of the draft gear 200 to the second short sides 392 and 393 of the two opposing side members 312 and 313. Thereafter, the procedure ends.

[0056] In a following step 970, the at least one pressure device of the spacer arrangement 300 is adjusted to apply a repelling/attracting pretension force between the two opposing side members 312 and 313; and in a step 980 thereafter, it is checked if the desired pretension force is applied. If so, the procedure ends; and otherwise, the procedure loops back to step 970.

[0057] As mentioned above, the second short sides 392 and 393 of the two opposing side members 312 and 313 may contain a respective first ridge/groove interface 352 and 353, and the innermost portion 205 of the draft gear 200 may contain a second ridge/groove interface 412 and 413 configured to be fitted into the respective first ridge/groove interface 352 and 353. Thus, connecting of the innermost portion 205 of the draft gear 200 to the second short sides 392 and 393 of the two opposing side members 312 and 313 may involve fitting the first and second ridge/groove interfaces 352, 353 and 412, 413 respectively into one another.

[0058] Variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.

[0059] The term comprises/comprising when used in this specification is taken to specify the presence of stated features, integers, steps or components. The term does not preclude the presence or addition of one or more additional elements, features, integers, steps or components or groups thereof. The indefinite article a or an does not exclude a plurality. In the claims, the word or is not to be interpreted as an exclusive or (sometimes referred to as XOR). On the contrary, expressions such as A or B covers all the cases A and not B, B and not A and A and B, unless otherwise indicated. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.

[0060] It is also to be noted that features from the various embodiments described herein may freely be combined, unless it is explicitly stated that such a combination would be unsuitable.

[0061] The invention is not restricted to the described embodiments in the figures, but may be varied freely within the scope of the claims.