VEHICULAR BODY REINFORCING DEVICE

Abstract

One end portion of a rod member is accommodated in a housing which is connected to one bracket BR1, and the other one end portion is connected to the other bracket. Between the one end portion of the rod member and the housing, there is disposed a biasing mechanism which biases against forces that enlarge and shorten an axial distance between the brackets. Furthermore, a friction mechanism, which presses the housing in a direction perpendicular to an axis of the rod member, is accommodated in the housing. The friction mechanism comprises a pressing member which is supported on the rod member to be in contact with an inner surface of the housing, a spring member and an adjusting member, so that a pressing force of the pressing member to the housing by the spring member is adjusted by the adjusting member.

Claims

1. A vehicle body reinforcing device comprising: brackets that support both axial ends of the device on a vehicle body; a housing which is connected to one bracket of the brackets that support the both ends; a rod member that has one end portion which is accommodated in the housing, and the other one end portion which is connected to the other one bracket of the brackets that support the both ends; a biasing mechanism which is disposed between the one end portion of the rod member and the housing, and which biases against forces that enlarge and shorten an axial distance between the one bracket and the other one bracket; and a friction mechanism which is supported on the rod member within the housing, and which presses the housing in a direction perpendicular to an axis of the rod member.

2. The vehicle body reinforcing device as claimed in claim 1, wherein the friction mechanism comprises: a pressing member which is movably supported on the rod member in the direction perpendicular to the axis of the rod member, and which is disposed to be in contact with an inner surface of the housing; a spring member which is disposed between the pressing member and the rod member, and which biases the pressing member to press the inner surface of the housing; and an adjusting member that adjusts a pressing force of the pressing member to the housing by the spring member.

3. The vehicle body reinforcing device as claimed in claim 2, wherein the rod member has a through hole in the direction perpendicular to the axis of the rod member, and wherein the spring member of the friction mechanism is accommodated in the through hole, and the pressing member is press-fitted into the through hole and held in the through hole together with the spring member, and wherein the adjusting member holds the spring member at a predetermined position in the through hole.

4. The vehicle body reinforcing device as claimed in claim 3, wherein the friction mechanism comprises a support member which is disposed between the adjusting member and the pressing member, and which supports the spring member movably in the through hole, and wherein the adjusting member holds the support member at a predetermined position in the through hole.

5. The vehicle body reinforcing device as claimed in claim 1, wherein the biasing mechanism comprises a first spring member and a second spring member, which bias the rod member against the axial movement of the rod member.

6. The vehicle body reinforcing device as claimed in claim 5, wherein the biasing mechanism comprises an engaging member which is accommodated in the housing, and which is engaged with the housing at a predetermined axial position of the rod member, and wherein the first spring member and second spring member are engaged with the rod member at axially opposite sides of the rod member through the engaging member.

7. The vehicle body reinforcing device as claimed in claim 6, wherein the rod member comprises a first axial member and a second axial member, and a connecting member that connects the first axial member and the second axial member in an axial direction in the housing, and wherein the biasing mechanism is disposed between the first axial member and the connecting member.

8. The vehicle body reinforcing device as claimed in claim 6, wherein the housing comprises: a case which is integrally formed with the one bracket in a cylindrical shape with a bottom, and which accommodates the first axial member; an annular member which is connected to the case, with the engaging member being held between the annular member and an opening portion of the case; and a cover which is connected to the case, with the annular member, the biasing mechanism, the friction mechanism and a part of the rod member being accommodated in the case.

9. The vehicle body reinforcing device as claimed in claim 2, wherein the housing has a side wall thereof with a through hole, and wherein the adjusting member is manipulated through the through hole.

10. The vehicle body reinforcing device as claimed in claim 2, the housing has an insert hole at a side wall thereof, and wherein the adjusting member is inserted into the housing through the insert hole, and held by the rod member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is a plan view showing an overall configuration of a vehicle body reinforcing device according to an embodiment of the present invention.

[0021] FIG. 2 is a sectional view showing a part of a vehicle body reinforcing device according to an embodiment of the present invention.

[0022] FIG. 3 is a sectional view showing a case for use in an embodiment of the present invention.

[0023] FIG. 4 is a sectional view showing a sub-assembly for use in an embodiment of the present invention.

[0024] FIG. 5 is a sectional view showing an annular member for use in an embodiment of the present invention.

[0025] FIG. 6 is a sectional view showing an assembling process for a vehicle body reinforcing device according to an embodiment of the present invention.

[0026] FIG. 7 is a sectional view showing an assembling process for a vehicle body reinforcing device according to an embodiment of the present invention.

[0027] FIG. 8 is a sectional view showing an assembling process for a vehicle body reinforcing device according to another embodiment of the present invention.

[0028] FIG. 9 is a sectional view showing a part of a pressing member for use in embodiments of the present invention.

[0029] FIG. 10 is a sectional view showing another embodiment of a pressing member for use in embodiments of the present invention.

EMBODIMENTS FOR CARRYING OUT THE INVENTION

[0030] Hereinafter, will be explained desirable embodiments of the present invention referring to drawings. FIG. 1 shows an overall configuration of a vehicle body reinforcing device according to an embodiment of the present invention. The vehicle body reinforcing device is mounted on frames F1 and F2 of a vehicle body, through brackets BR1 and BR2 provided at both axial ends of the device, respectively. The bracket BR1 is integrally formed with a part of a housing 10, in which one end portion of a rod member 20 is accommodated, with the other one end portion thereof being screwed with the bracket BR2. The bracket BR1 may be made separately and screwed with the housing 10 in the same manner as the bracket BR2, and the connected structure between the bracket BR and the housing 10 may be provided in any fashion.

[0031] FIG. 2 shows a sectional view showing a part (left side part in FIG. 1) of the above-described vehicle body reinforcing device, wherein a biasing mechanism 30 is disposed between the one end portion of the rod member 20 and the housing 10, and biases against forces that enlarge and shorten an axial distance between the brackets BR1 and BR2, to configure a rigidity adjusting mechanism. Furthermore, there is provided a friction mechanism 40 which is supported on the rod member 20 within the housing 10, and which presses the housing 10 in a direction perpendicular to an axis of the rod member 20.

[0032] The housing 10 of the present embodiment is configured by a case 11 which is integrally formed with the bracket BR1 in a cylindrical shape with a bottom, and which accommodates a first axial member 21, an annular member 12 which is connected to the case 11, with an engaging member 33 being held between the annular member 12 and an opening portion of the case 11, and a cylindrical cover 13 which is connected to the case, with the annular member 12, the biasing mechanism 30, the friction mechanism 40 and a part of the rod member 20 being accommodated in the case 11. The case 11 and the annular member 12 are screwed to be held at a predetermined position. Furthermore, a through hole 11h is formed on a side wall of the case 11, and the biasing mechanism 30 and friction mechanism 40 are accommodated in the case 11, the details of which will be described later.

[0033] On the other hand, the rod member 20 of the present embodiment is divided into the first axial member 21 and second axial member 22, which are connected together by a connecting member 23, and held at a predetermined position by a nut 24. The first axial member 21 is formed into a stepped configuration having an intermediate diameter portion 21a, a large diameter portion 21b and a small diameter portion 21c, as viewed from its tip end toward a portion connected with the connecting member 23. Furthermore, at the tip end of the small diameter portion 21c, there is formed a male screw portion 21d, with which (a female screw portion of) the connecting member 23 is screwed, and it is so configured that the first axial member 21 and the connecting member 23 are connected together, in such a state that the biasing mechanism 30 is supported on the small diameter portion 21c. With respect to the first axial member 21, its intermediate diameter portion 21a and large diameter portion 21b are supported slidably within the case 11 through bushes B1 and B2, respectively.

[0034] On the small diameter portion 21c, there are mounted a first spring member 31 and a second spring member 32, which configure the biasing mechanism 30 of the present embodiment. The first spring member 31 and second spring member 32 of the present embodiment are configured by stacking a plurality of disk springs, and a plate-like engaging member 33 is disposed between them. With respect to the first spring member 31 and second spring member 32, a compressed coil spring or the like may be employed. The engaging member 33 is supported to be movable against the small diameter portion 21c of the first axial member 21, and the case 11 and annular member 12 are connected together and engaged with the hosing 10, with a peripheral portion of the engaging member 33 being held between an opening step portion 11d of the case 11 and the annular member 12. Furthermore, the engaging member 33 is formed with a through hole 33h. A seal S is held on the inner peripheral surface of the opening portion of the annular member 12 so as to be in contact with the second axial member 22, and an O-ring R is held on the outer peripheral surface of the annular member 12 to be in contact with the inner peripheral surface of the opening portion of the case 11.

[0035] The friction mechanism 40 of the present embodiment comprises a pressing member 41 which is movably supported on the rod member 20 in the direction perpendicular to the axis of the rod member 20, and which is disposed to be in contact with an inner surface of the housing 10, a spring member 42 which is disposed between the pressing member 41 and the rod member 20, and which biases the pressing member 41 to press the inner surface of the housing 10, and an adjusting member 43 that adjusts a pressing force of the pressing member 20 to the housing 10 by the spring member 42, and it is so configured that the pressing member 41 presses the inner surface of the housing 10 in the direction perpendicular to the axis of the rod member 20. According to the present embodiment, a support member 44 and a washer W are disposed between the pressing member 41 and the adjusting member 43.

[0036] As shown in FIG. 2, the large diameter portion 21b of first axial member 21 is formed with a stepped through hole (stepped hole 21e) in a direction perpendicular to its axis (i.e., radial direction), so that the support member 44 and spring member 42 are accommodated in its intermediate diameter hole, and the pressing member 41 is press-fitted into its large diameter hole, in such a state that the washer W is disposed between the pressing member 41 and spring member 42. Furthermore, a bolt-like adjusting member 43 is screwed into a small diameter portion of the stepped hole 21e, and supported so that its held position can be adjusted by a tool (not shown) inserted through the through hole 11h. After its adjustment, a cap 45 is fixed to the through hole 11h. Consequently, the pressing member 41 is held by the biasing force of the spring member 42 so as to be pressed onto the inner surface of the case 11, and it is so configured that when the case 11 (housing 10) and first axial member 21 (rod member 20) move relative to each other, the frictional force is applied to them by the pressing member 41, and the frictional force can be adjusted by the adjusting member 43. With respect to the spring member 42, not only the disk spring but also the compressed coil spring or the like may be employed.

[0037] As described above, the friction mechanism 40 is accommodated in the housing 10 together with the biasing mechanism 30, so that its installing performance on a vehicle is high, and its flexibility of design will be improved. In addition, as the pressing member 41 is formed with its contacting surface in a curved surface, as shown in FIG. 9 for example, and configured to be pressed onto the inner surface of the case 11, so that the pressing area by the pressing member 41 will be enlarged, so that spring load can be made high to ensure the large frictional force (braking force).

[0038] The vehicle body reinforcing device as configure above is mounted on the vehicle frames F1 and F2 as indicated by two-dot chain lines in FIG. 1, and secured by bolt. Then, in the case where such outer force that enlarges the axial distance between the brackets BR1 and BR2 is applied, the first spring member 31 as shown in FIG. 2 is compressed, so that the biasing force that shortens the axial distance between the brackets BR1 and BR2 is applied. On the contrary, in the case where such outer force that shortens the axial distance between them is applied, the second spring member 32 is compressed, so that the biasing force that enlarges the axial distance between them is applied. Consequently, the rigidity between the brackets BR1 and BR2 are adjusted, thereby to function as the rigidity adjusting mechanism. During this operation, the frictional force applied to the rod member 20 by the friction mechanism 40 acts as the braking force, to suppress a rapid displacement and minimize amplitude of vibrations, thereby to function as a damping mechanism.

[0039] Next will be explained an assembling process with reference to FIGS. 3-7. At the outset, as shown in FIG. 3, the bushes B1 and B2 are press-fitted into the case 11. Next, a sub-assembly SA as shown in FIG. 4 is configured. That is, the support member 44, spring member 42 and washer W are accommodated in the intermediate diameter hole of the stepped hole 21e defined in the large diameter portion 21b of the first axial member 21, and the pressing member 41 is press-fitted into its large diameter hole, and the adjusting member 43 is screwed into the small diameter hole of the stepped hole 21e, and held therein. With the pressing member 41 being press-fitted into the hole, the support member 44, spring member 42 and washer W are prevented from being fallen down by their own weights. Next, the first spring member 31, engaging member 33 and second spring member 32 are mounted in sequence on the small diameter portion 21c of the first axial member 21. When the male screw portion 21d of the first axial member 21 is screwed with the female screw portion of the connecting member 23, the first spring member 31 is disposed between first axial member 21 and the engaging member 33, and the second spring member 32 is disposed between the engaging member 33 and the connecting member 23, as shown in FIG. 4, whereby the first spring member 31 and second spring member 32 are held to be in such a state as being slightly compressed. Furthermore, as shown in FIG. 5, the seal S is fixed to the opening portion of the annular member 12, and the O-ring R is fixed to its outer peripheral surface.

[0040] Then, the sub-assembly SA as shown in FIG. 4 is accommodated in the case 11 as shown in FIG. 3 to become such state as shown in FIG. 6. Then, the annular member 12 is screwed into the opening end portion of the case 11 to form such state as shown in FIG. 7. When the tool is inserted from the through hole 11h to rotate the adjusting member 43, the pressing member 41 is pressed onto the inner surface of the case 11 as shown in FIG. 2, so that the pressing force of the pressing member 41 by the spring member 42, i.e., the frictional force (braking force) applied to the rod member 20 is adjusted. Also, as shown in FIG. 7, the second axial member 22 is screwed into the connecting member 23, and the nut 24 is screwed, thereby to be held at the predetermined position. Then, the cover 13 is connected to the case 11, and the cap 45 is fixed to the through hole 11h, to form such state as shown in FIG. 2.

[0041] As described above, each component part may be assembled into the case 11 of the cylindrical shape with the bottom from one side (only from the right side in FIGS. 3-7), so that the mass productivity is improved, and dust and/or water proof features may be easily ensured. Also, as gripping portions or the like of the tools required for assembling it can be gathered at the one side, gripping marks or the like caused by the tools can be concealed by such a minimum member as the above-described cover 13, so that it can be assembled appropriately without being disfigured.

[0042] FIG. 8 relates to another embodiment of the invention, wherein the case 11 (housing 10) has a through hole 11k (larger in diameter than the through hole 11h) defined at its side wall, through which the adjusting member 43 is inserted from its outside, so that the frictional force by the pressing member 41 is adjusted. Therefore, it is not required to assemble the adjusting member 43 in the form of the sub-assembly SA as shown in FIG. 4, but it can be assembled in the form of the final assembly as shown in FIG. 8, so that its screw-engagement can be made longer. According to the present embodiment, therefore, by means of the biasing force of the spring member 42, the pressing member 41 is held so as to be pressed onto the inner surface of the case 11, so that when the case 11 (housing 10) and first axial member 21 (rod member 20) move relative to each other, the frictional force (braking force) is applied to them by the pressing member 41.

[0043] FIG. 9 relates to one embodiment of the above-described pressing member 41, wherein a rib 41p is formed on a side surface of the pressing member 41 to extend in parallel with the pressing direction. By means of this embodiment, comparing with the complete fitting structure of the pressing member 41 fitted into the large diameter portion of the stepped hole 21e, its performance to be inserted will be improved. Also, the contacting area between the rib 41p and the first axial member 21 (stepped hole 21e thereof) can be set to be large enough so as to provide a sufficient surface pressure against the frictional load in the axial direction of the first axial member 21 (rod member 20), whereby backlash caused by sliding motion of the rod member 20 can be eliminated. Or, without considering the backlash caused by such sliding motion, by focusing on how to hold the pressing member 41 to form the sub-assembly SA, if a portion to be pressed into the stepped hole 21e is made small, and a protrusion 41t is formed on a side surface of the pressing member 41, as shown in FIG. 10, it can be easily pressed into the stepped hole 21e, even by hand.

DESCRIPTION OF CHARACTERS

[0044] 10 housing [0045] 11 case [0046] 12 annular member [0047] 13 cover [0048] 20 rod member [0049] 21 first axial member [0050] 22 second axial member [0051] 23 connecting member [0052] 24 nut [0053] 30 biasing mechanism [0054] 31 first spring member [0055] 32 second spring member [0056] 33 engaging member [0057] 40 friction mechanism [0058] 41 pressing member [0059] 42 spring member [0060] 43 adjusting member [0061] 44 support member