Lifting device, in particular a cable winch

Abstract

A cable winch having a base frame with at least two base plates, and at least two longitudinal beams for connecting the base plates to each other. One of the base plates is designed such that the longitudinal beams can be installed or removed in the direction of the longitudinal axis of the longitudinal beams through the base plate, with passage openings in the base plate for feeding the longitudinal beams there through, and with one beam end of each of the longitudinal beams inserted into one of the passage openings. A beam end of each of the longitudinal beams is fastened to the base plate in and against the direction of the longitudinal axis of the longitudinal beam by a retaining element that is fastened to an outer face of the base plate, wherein a separate retaining element is provided for each longitudinal beam in order to enable simple assembly, disassembly, or conversion.

Claims

1. A lifting device, said lifting device having a base frame comprising at least two base plates, having at least two longitudinal supports comprising a first support end and an opposing second support end, said longitudinal supports connecting the base plates together and spacing them apart, wherein the first support end and the second support end of the longitudinal supports are detachably fastened to the base plates of the lifting device in such a way and one of the at least two base plates is designed in such a way that the longitudinal supports can be installed or removed in the direction of their longitudinal axis and through one of the at least two base plates, for which purpose passage openings for passage of the longitudinal supports are provided in one of the base plates of the at least two base plates, in each case one support end of the longitudinal supports is inserted and fastened in one of the passage openings and the support end of the longitudinal supports is fixed to the base plate via a retaining element in order to prevent displacement of the longitudinal support along the longitudinal axis in the direction of the two support ends, for which purpose the retaining element is fastened to an outer side of the base plate, wherein the support end of the longitudinal supports has a retaining bore, and the retaining element is fixed to the support end via a first fastening element that engages in the retaining bore, wherein for each longitudinal support a respective separate retaining element is provided, and that, in addition to the first fastening element, a second fastening element is provided by means of which the respective retaining element is fixed to the base plate.

2. The lifting device as claimed in claim 1, wherein the respective retaining element covers only one passage opening.

3. The lifting device as claimed in claim 2, wherein the respective retaining element extends transversely to the longitudinal axis over less than a quarter of the outer side of the base plate in the corresponding corner region of the base plate.

4. The lifting device as claimed in claim 3, wherein the retaining element is a flat planar component.

5. The lifting device as claimed in claim 4, wherein the retaining element has a first region for covering a passage opening.

6. The lifting device as claimed in claim 5, wherein the retaining element for fixing to the base plate.

7. The lifting device as claimed in claim 2, wherein the retaining element is a flat planar component.

8. The lifting device as claimed in claim 2, wherein the retaining element has a first region for covering a passage opening.

9. The lifting device as claimed in claim 8, wherein the retaining element has a second region for fixing to the base plate.

10. The lifting device as claimed in claim 2, wherein the retaining element has a second region for fixing to the base plate.

11. The lifting device as claimed in claim 1, wherein the respective retaining element extends transversely to the longitudinal axis over less than a quarter of the outer side of the base plate in the corresponding corner region of the base plate.

12. The lifting device as claimed in claim 11, wherein the retaining element is a flat planar component.

13. The lifting device as claimed in claim 11, wherein the retaining element has a first region for covering a passage opening.

14. The lifting device as claimed in claim 11, wherein the retaining element has a second region for fixing to the base plate.

15. The lifting device as claimed in claim 1, wherein the retaining element is a flat planar component.

16. The lifting device as claimed in claim 15, wherein the retaining element has a first region for covering a passage opening.

17. The lifting device as claimed in claim 15, wherein the retaining element has a second region for fixing to the base plate.

18. The lifting device as claimed in claim 1, wherein the retaining element has a first region for covering a passage opening.

19. The lifting device as claimed in claim 18, wherein the retaining element has a second region for fixing to the base plate.

20. The lifting device as claimed in claim 1, wherein the retaining element has a second region for fixing to the base plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a perspective view of a lifting device in accordance with the invention,

(2) FIG. 2 shows a side view of FIG. 1partly in cross-section,

(3) FIG. 3 shows a detail of FIG. 2 from the region of fastening a longitudinal support to a first base plate of the base frame and

(4) FIG. 4 shows a perspective view of FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) FIG. 1 shows a perspective view of a lifting device in accordance with the invention in the form of a cable winch 1 of a lifting apparatus with a cable drum 2 which is mounted at both ends in a base frame 3.

(6) The base frame 3 has a shape with an overall cuboidal notional envelope and comprises a first base plate 4a and a second base plate 4b, on the mutually facing first and second inner sides 4c and 4d of which the cable drum 2 is mounted. The cable drum 2 is able to rotate about an axis of rotation D and is driven by an electric motor 2a via a transmission 2b. The first base plate 4a and the second base plate 4b are each cuboidal or rectangular.

(7) Furthermore, the base frame 3 comprises a plurality of, in particular four, longitudinal supports, of which FIG. 1 shows a first longitudinal support 5a, a second longitudinal support 5b and a third longitudinal support 5c. The base plates 4a, 4b are spaced apart from one another and connected to one another via the longitudinal supports 5a, 5b, 5c. In this connection, the longitudinal supports 5a, 5b, 5c each extend between the opposing corners, serving as fastening locations, of a notional quadrilateral, in particular a rectangle, preferably a square, provided on the first and second base plates 4a, 4b. In the case of the second base plate 4b, the longitudinal supports 5a, 5b, 5c are disposed in the corner regions of the virtually square base plate 4b. Compared with the second base plate 4b the first base plate 4a has a rectangular shape since this is lengthened beyond the third longitudinal support 5c and the possible fourth longitudinal support, not shown, in order to fasten the electric motor 2a. In a corresponding manner, the first and second longitudinal supports 5a, 5b are disposed in the region of the lower corner regions of the first base plate 4a and the third longitudinal support 5c and a possible fourth longitudinal support are disposed in the region of the middle and of the side edge of the first base plate 4a. Furthermore, this first base plate 4a, in the region of its outer side 4e, receives the transmission 2b which drivingly connects the cable drum 2 to the electric motor 2a.

(8) The longitudinal supports 5a, 5b are designed as rods of solid material and, depending on the use of the cable winch 1, at least two and up to four longitudinal supports 5a, 5b, 5c are provided which are disposed in selected or in all opposing corners of the notional quadrilateral on the base plates 4a, 4b. The longitudinal supports 5a, 5b, 5c are intended to connect the base plates 4a, 4b to one another in a twisting-resistant manner and, over the length of the longitudinal supports 5a, 5b, 5c the desired spacing and parallelism between the two base plates 4a, 4b is achieved within the desired tolerances. In the illustrated exemplified embodiment, a total of three longitudinal supports 5a, 5b, 5c are provided. In order not to hinder the winding and unwinding of a cable, not shown, by the cable drum 2 a fourth longitudinal support is not mounted in this case. According to requirements, usage or the installation situation, the three longitudinal supports 5a, 5b, 5c or even four can be fastened to desired fastening locations or corners of the notional quadrilaterals.

(9) The longitudinal supports 5a, 5b, 5c each have a first support end 5d and an opposing second support end 5e. The first support ends 5d are each fastened in the first base plate 4a and the second support ends 5e are each fastened in the second base plate 4b. The special manner of fastening the second support ends 5e in the second base plate 4b is explained in conjunction with FIGS. 3 and 4.

(10) FIG. 1 shows the cable winch in a so-called operating state, i.e. after complete mounting of the longitudinal supports 5a, 5b, 5c. In this operating state, the longitudinal supports 5a, 5b, 5c are oriented with their longitudinal axes L in parallel with and laterally offset with respect to the axis of rotation D of the cable drum 2.

(11) FIG. 1 shows a cable winch 1 with a base frame 3 in accordance with the invention. A cable winch 1 of this type can, as a basic lifting device, be a component of a modular design system and be used in a different manner by reason of connection elements 18. As a so-called foot-mounted hoistas shown in FIG. 1this can be fastened to a stationary component. For this purpose, corresponding connection elements 18 are fastened to the base plates 4a, 4b. This cable winch 1 can also be a component of a crane trolley in which chassis components are fastened to the base plates 4a, 4b. A lower flange crane trolley, a single-rail crane trolley with the cable winch 1 arranged next to the rail and a dual-rail crane trolley are possible crane trolley constructions.

(12) In a corresponding manner, the base plates 4a, 4b have, in addition to the mounting of the cable drum 2, different further functions such as e.g. supporting the electric drive 2a, receiving attachment cross-pieces for parts of a cable reeving arrangement, housing electric equipment, permitting foot mounting of the cable winch or attaching chassis components.

(13) FIG. 2 shows a partially cut-away side view of the cable winch 1 according to FIG. 1. It can be seen that the two base plates 4a, 4b are produced as cast parts. The implementation of the connection between the support ends 5d, 5e and the base plates 4a, 4b is now explained in more detail with the aid of FIGS. 2, 3 and 4.

(14) FIG. 3 shows an enlargement of a section of FIG. 2 from the region of the second base plate 4b. As previously described in relation to FIG. 1, the second base plate 4b has the same fastening options for a total of up to four longitudinal supports 5a, 5b, 5c or less than four longitudinal supports 5a, 5b, 5c at four different fastening locations. FIG. 3 shows by way of example the fastening locations for the first and third longitudinal supports 5a, 5c. In order to fasten the longitudinal supports 5a, 5c with their second support ends 5e to the second base plate 4b a respective passage opening 8 is provided in the second base plate 4b in the region of the desired fastening locations. In the present exemplified embodiment, the passage opening 8 is formed, as seen in the longitudinal direction of the longitudinal axis L, in two parts with a front and a rear partseparated by an intermediate spacein order to create a type of multiple-shear bolt connection. By means thereof, connection elements 18 can then easily be fastened to the base plates 4a, 4b. A single-piece design for the passage opening 8 is also possible. The first base plate 4a can in the same way comprise corresponding passage openings 8.

(15) Since the longitudinal supports 5a, 5b, 5c are designed as rods with a round cross-section, the passage openings 8 each have a cross-sectional surface which is slightly larger in particular in relation to their diameter than the cross-sectional surface of the longitudinal supports 5a, 5b, 5c which is disposed concentrically in the operating state. The longitudinal supports 5a, 5b, 5c therefore have form-locking contact with the second base plate 4b. The central passage axis d of the passage opening 8 therefore coincides with the longitudinal axis L of the longitudinal supports 5a, 5b, 5c in the operating state.

(16) In order to secure the second support end 5e of the longitudinal supports 5a, 5b, 5c against displacement in the two opposing directions along the longitudinal axis L of the longitudinal supports 5a, 5b, 5c, a holding bore 10a which has an internal thread and extends centrally in the direction of the first support end 5d along the longitudinal axis L of the longitudinal supports 5a, 5b, 5c is provided in the second support end 5e starting from the outer end face.

(17) At the same time, for each longitudinal support 5a, 5b, 5c a respective separate retaining element 10 is provided which has a bore 9 through which a screw 11 passes and engages in the retaining bore 10a so that the second support end 5e is fixed to the retaining element 10.

(18) The respective retaining element 10 thus covers only a single passage opening 8 and is fixed to the outer side 4f of the base plate 4b by means of a further screw 12 which passes through a corresponding further bore 13. In this way, the corresponding longitudinal support 5a, 5b, 5c is fixedly held on the base plate 4b and secured against movement along the longitudinal axis L in the direction of one of the support ends 5d, 5e.

(19) The retaining element 10 is a flat planar steel component.

(20) The retaining element 10 has a first region 14a for covering the passage opening 8 provided with the bore 9 and has a second region 14b for fixing to the base plate 4b which is provided with a further bore 13. In the first region 14a, the retaining element is in the form of an arc of a circle and in the second region 14b it is trapezium-like or trapezoidal so that a shape merged from a circle segment and a partial trapezium is produced which approximately corresponds to a type of droplet shape (cf. FIG. 4). In this connection, as seen in the direction of the longitudinal axis L, the retaining element 10 extends with both regions 14a, 14b in a direction transverse to the longitudinal axis L only slightly beyond the associated passage opening 8 along the outer side 4f of the second base plate 4b. Each retaining element 10 preferably extends only over clearly less than a quarter of the outer side 4f of the second base plate 4b, in particular only in the corresponding corner region of the base plate 4b. Therefore, none of the retaining elements 10 can serve as a common retaining element 10 for more than one of the longitudinal supports 5a, 5b, 5c since it does not extend over or cover two passage openings 8 at the same time. It is rather the case that for each longitudinal support 5a, 5b, 5c a separate dedicated retaining element 10 must be used.

(21) By this type of fastening of the second support ends 5e in the passage openings 8 by means of respective one of the retaining elements 10 with the screw 11 and the screw 12 it is possible, after the retaining element 10 has been taken out, to displace the respectively associated longitudinal support 5a, 5b, 5c individually and independently of the remaining still fastened longitudinal supports 5a, 5b, 5c along the longitudinal axis L through the passage opening 8 out of the second base plate 4b or to pull it out completely. Therefore, it is possible, without taking out the cable drum 2, to change the position or number of the longitudinal supports 5a, 5b, 5c.

(22) It will be understood that the first support ends 5d of the longitudinal supports 5a, 5b, 5c can also be fastened to the first base plate 4a in each case in the same manner as the second support ends 5e are fastened to the second base plate 4b by means of a separate retaining element 10. Therefore, after the associated retaining elements 10 have been taken out, the longitudinal supports 5a, 5b, 5c can each at least be displaced and also removed through the passage openings 8 individually along the longitudinal axis L selectively in one of the two opposing directions, i.e. in the direction of one of the two support ends 5d, 5e.

LIST OF REFERENCE SIGNS

(23) 1 cable winch 2 cable drum 2a electric motor 2b transmission 3 base frame 4a first base plate 4b second base plate 4c inner side of the first base plate 4a 4d inner side of the second base plate 4b 4e outer side of the first base plate 4a 4f outer side of the second base plate 4b 5a first longitudinal support 5b second longitudinal support 5c third longitudinal support 5d first support end 5e second support end 8 passage opening 9 bore 10 retaining element 10a retaining bore 11 screw 12 screw 13 bore 14a first region 14b second region 18 connection element d passage axis D axis of rotation L longitudinal axis