JP2010052539A - Module for trunnion type suspension and assembling method of trunnion type suspension using the module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remarkably reduce a workload by allowing easier assembling work of a trunnion type suspension than ever. <P>SOLUTION: A cross member integral trunnion bracket is adopted, equipped with a cross member part 16 connecting between right and left frames 5, and a pair of trunnion bracket parts 19 integrally formed on a lower face at both ends of the cross member part 16 to open outward in the vehicle width direction toward the lower part, and having a boss part for pivotably supporting a trunnion shaft 17. A V-rod 22 connects between the cross member part 16 and front and rear axles 1, 2, respectively, front and rear faces of a lower end of the trunnion bracket part 19 and lower sides at both ends of the front and rear axles 1, 2 are connected respectively by a parallel link type lower rod 9 and put together into one structural unit to form the module 28 for the trunnion type suspension. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a trunnion-type suspension module that can be employed in a rear-wheel two-shaft large truck and the like, and a method for assembling a trunnion-type suspension using the module.

  9 to 11 show a suspension dedicated to a tandem axle called a trunnion type suspension. The trunnion shaft 3 is fixed to a frame 5 by a trunnion bracket 4 between a pair of axles 1 and 2 arranged in front and rear. Then, a central portion of the leaf spring 6 is rotatably attached to the trunnion shaft 3 via a rotation base 7, and the front and rear axles 1 and 2 are supported by both ends of the leaf spring 6. 2 has an upper rod 8 and a lower rod 9 for holding the position in the front-rear direction.

  Here, at the position where the trunnion bracket 4 is fixed to the frame 5, the cross member 10 is passed between the left and right frames 5 to be reinforced. The upper rod 8 is connected to the upper surface of the axle 1 and the center of the axles 1 and 2, and the lower rod 9 is provided between the front and rear surfaces of the lower end of the trunnion bracket 4 and the lower sides of both ends of the axles 1 and 2. It is connected by.

  As a result, in such a trunnion type suspension, the vertical movement of the front and rear axles 1, 2 is absorbed by the leaf spring 6, and the force in the front-rear direction is transmitted to the frame 5 via the upper rod 8 and the lower rod 9, and the leaf spring By turning 6 around the trunnion shaft 3, a good step over the step is realized.

  In the figure, reference numeral 11 denotes a U bolt for mounting the central portion of the leaf spring 6 on the rotating base 7, and 12 denotes a mounting portion of the upper rod 8 provided on the front and rear surfaces of the central portion of the cross member 10. Reference numeral 13 denotes a mounting portion of the upper rod 8 provided on the upper center of each axle 1, 2, 14 denotes a mounting portion of the lower rod 9 provided on the front and rear surfaces of the lower end portion of the trunnion bracket 4, and 15 denotes each axle 1, 2. The attachment part of the lower rod 9 provided in the lower part of both ends is shown.

Further, as prior art document information related to this type of trunnion type suspension, there are the following Patent Documents 1 and 2 and the like.
JP-A-7-266818 Japanese Utility Model Publication No. 5-37511

  However, in such a conventional structure, the cross member 10 and the trunnion bracket 4 are individually assembled to the frame 5 as shown in FIGS. 12 and 13, respectively. It is necessary to assemble the various members in order with the frame 5 as a starting point because the front and rear axles 1 and 2 cannot be assembled through the upper rod 8 and the lower rod 9 until after the frame 4 is assembled to the frame 5 and positioned. The series of work steps required took a long time, and the work burden increased.

  In addition, the relative relationship between the cross member 10 and the trunnion bracket 4 is likely to be shifted due to variations that occur when the cross member 10 and the trunnion bracket 4 are assembled to the frame 5, and the upper rod 8 with respect to each of the cross member 10 and the trunnion bracket 4. The axles 1 and 2 connected by the lower rod 9 may be inclined in the front-rear direction or laterally shifted in the vehicle width direction and may not be disposed at the proper proper position.

  For this reason, after the trunnion type suspension is assembled, it is necessary to adjust the alignment of the upper rod 8 and the lower rod 9 so that the front and rear axles 1 and 2 are arranged at appropriate positions. It took a lot of time and effort, and the work load was large.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to make it easier to assemble a trunnion suspension than in the past and to greatly reduce the work load.

  The present invention relates to a cross member portion that connects the left and right frames, and a boss that is integrally formed so as to open outward in the vehicle width direction as it goes downward on the lower surfaces of both end portions of the cross member portion and to support the trunnion shaft. A cross member integrated trunnion bracket having a pair of trunnion bracket portions having a portion, connecting the cross member portion and the front and rear axles by V rods respectively, and front and rear of the lower end portion of the trunnion bracket portion The present invention relates to a trunnion type suspension module, characterized in that a surface and the lower side of both ends of the front and rear axles are connected together by a parallel link type lower rod to be combined into one structural unit.

  Thus, in this way, it is possible to form a module in which the front and rear axles are connected to the cross member integrated trunnion bracket by the V rod and the lower rod and integrated into one structural unit without interposing a frame. Therefore, if this module is assembled in advance in an environment with good workability, the main structure of the trunnion type suspension will be assembled at once just by assembling this module to the frame. Compared with a series of work steps in which various members are assembled in turn as a base point, the work efficiency is improved, and the work load required for the assembly work of the trunnion suspension is greatly reduced.

  Furthermore, by adopting a cross member integrated trunnion bracket in which the trunnion bracket portion is integrally formed in the cross member portion, the relative relationship between the cross member portion and the trunnion bracket portion remains unchanged, and the relative relationship between the two is not different from the conventional one. Since the cross member part and the front and rear axles are respectively connected by V rods, the position in the vehicle width direction of each axle is accurately determined, and the front and rear surfaces of the lower end part of the trunnion bracket part and the front and rear parts are eliminated. When the two lower ends of the axles are connected to each other by parallel link type lower rods, the position of each axle in the front-rear direction is accurately determined.

  As a result, there is almost no risk that each axle will be tilted in the front-rear direction or laterally displaced in the vehicle width direction and will not be placed in the proper proper position, and alignment adjustment will hardly be performed when assembled as a module. Thus, it is possible to further reduce the work load by eliminating the labor and time required for the conventional alignment adjustment.

  Further, the reduction in the number of assembly steps due to the fact that the cross member and the left and right trunnion brackets, which are conventionally divided into three parts, become one part as a cross member integrated trunnion bracket also contributes to the reduction of the work load.

  Further, when a trunnion type suspension is assembled using the trunnion type suspension module as described above, the module is assembled in advance, and the cross member portion of the cross member integrated trunnion bracket of the module is sandwiched between the left and right frames. After that, the center part of the leaf spring is rotatably attached to the trunnion bracket part of the cross member integrated trunnion bracket of the module via the trunnion shaft, and both end parts of the leaf spring are both end parts of the front and rear axles. The trunnion type suspension may be completed by fixing to the upper side.

  According to the above-described trunnion-type suspension module of the present invention and the method for assembling the trunnion-type suspension using the module, the following various excellent effects can be obtained.

  (I) Since the front and rear axles are connected to the cross member integrated trunnion bracket by the V rod and the lower rod without interposing the frame, the module can be integrated into one structural unit. The main structure of the trunnion type suspension can be assembled at a time by simply assembling, and the work burden can be greatly reduced compared to a series of work steps in which various members are assembled in order starting from the conventional frame. .

  (II) The trunnion bracket part is integrally formed with the cross member part, so that the relative relationship between them is eliminated, and the position of each axle in the vehicle width direction and the front-rear direction is determined by the connection by the V rod and the parallel link type lower rod. Since it can be determined accurately, alignment adjustment is almost unnecessary when it is assembled as a module, and the labor and time required for this type of alignment adjustment are greatly reduced, further reducing the work load. Can be achieved.

  (III) Since the cross member and the left and right trunnion brackets which have been divided into three parts in the past are made into one part as a cross member integrated trunnion bracket, the number of parts and assembly man-hours can be greatly reduced. The work burden can be further reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1-6 shows an example of the form which implements this invention, and the part which attached | subjected the code | symbol same as FIGS. 9-13 represents the same thing.

  In this embodiment, as shown in FIGS. 1 and 2, the cross member 16 connecting the left and right frames 5 (see FIG. 3), and the vehicle width as it goes downward on the bottom surfaces of both ends of the cross member 16. A cross member integrated trunnion bracket 20 is constituted by a pair of trunnion bracket portions 19 integrally formed so as to open outward in the direction and having a boss portion 18 for supporting the trunnion shaft 17 (see FIG. 6).

  That is, the cross member integrated trunnion bracket 20 is manufactured as an integrally molded casting so that it can be applied in place of the cross member and trunnion bracket in the conventional trunnion type suspension.

  Here, the cross member portion 16 corresponding to the conventional cross member is provided with attachment portions 21 at both ends so that bolts can be fastened to the web of the frame 5 (see FIG. 3). The frame 5 is formed so as to expand toward the web as viewed from above, and each of the attachment portions 21 is arranged with a sufficient span in the longitudinal direction of the frame 5.

  Further, on the front and rear surfaces of both end portions of the cross member portion 16, mounting portions 23 for connecting an open side end portion of a V rod 22 (see FIGS. 3 and 5) to be described later are inclined with respect to the vehicle width direction. In addition, a mounting portion 24 for connecting the end portion of the parallel link type lower rod 9 (see FIGS. 3 and 4) is formed at the lower end of each trunnion bracket portion 19. .

  In addition, a rib 25 is formed in the central portion of the cross member portion 16 so as to be continuous with the inclined posture of the vehicle width direction inner portion 19a on the upper side of each trunnion bracket portion 19. The vehicle width direction inner side portion 19a above each trunnion bracket portion 19 and the upper structure of the cross member portion 16 are formed so as to form an arch structure as a whole.

  Reference numeral 26 in FIGS. 1 and 2 denotes a female screw portion for fixing pipes and wirings. The boss portion is cast together when the cross member integrated trunnion bracket 20 is integrally formed as described above. Then, it is threaded.

  3 to 5 exemplify a case where a trunnion type suspension is actually configured using such a cross member integrated trunnion bracket 20, and mounting portions 23 on the front and rear surfaces of both ends of the cross member portion 16. The axles 1 and 2 are respectively connected to the upper attachment portions 13 by V-rods 22 so that the front and rear attachment portions 24 of the trunnion bracket portion 19 and the both ends of the axles 1 and 2 are below. The side mounting portion 15 is connected to each other by a conventional parallel link type lower rod 9.

  Further, the cross member portion 16 is passed between the webs of the left and right frames 5 and is bolted to the web via the attachment portion 21, and the boss portions 18 of the trunnion bracket portions 19. Each of the trunnion shafts 17 extending to the outside in the vehicle width direction is fitted and installed, and the central portion of the leaf spring 6 is interposed between the projecting ends of the trunnion shafts 17 via the rotation base 7 as usual. The leaf spring 6 is fixed to the upper ends of the front and rear axles 1 and 2.

  Here, in the present embodiment, the trunnion shaft 17 is individually provided for each of the left and right trunnion bracket portions 19 and is not in the form of sharing a single trunnion shaft in the vehicle width direction as in the prior art. The trunnion shafts 17 are structured so as not to function as beams connecting the left and right trunnion bracket portions 19, but instead, the peripheral portions of the boss portion 18 of the trunnion bracket portion 19 and the upper side thereof A form in which the frame 5 is connected by a reinforcing plate 27 is employed.

  That is, in the example illustrated here, the trunnion bracket portion 19 is offset in the front and rear positions sandwiching the boss portion 18 and the positions corresponding to the two positions directly above the front and rear directions in the direction away from each other. The appropriate position on the frame 5 is connected by two reinforcing plates 27 (which may be connected to one frame), and at least a part of the connecting portion of the reinforcing plate 27 to the web of the frame 5 Are fastened together with the attachment portion 21 of the cross member portion 16 and, as shown in FIG. 6, each of the reinforcing plates 27, the frame 5, and the cross member integrated trunnion bracket 20 have a strong box structure. Is formed.

  In this embodiment, the cross member integrated trunnion bracket 20 is used to construct the trunnion type suspension. When the trunnion suspension is constructed, the mounting portions 23 on the front and rear surfaces of both ends of the cross member portion 16 and the centers of the axles 1 and 2 are used. The upper mounting portion 13 is connected to each other by a V rod 22, and between the mounting portion 24 on the front and rear surfaces of the lower end portion of the trunnion bracket portion 19 and the lower mounting portions 15 of the axles 1 and 2. Are connected to each other by a conventional parallel link type lower rod 9 so as to be combined into one structural unit, which can be assembled as a module constituting the main structure of the trunnion type suspension prior to the assembly work to the frame 5. Yes.

  More specifically, as shown in FIG. 7A, one end of the lower rod 9 is connected to the lower side of both ends of the front and rear axles 1 and 2 set on a processing table (not shown). The cross member integrated trunnion bracket 20 in which the open end of the V rod 22 is connected to the front and rear surfaces of both ends of the cross member portion 16 is lowered to a position corresponding to the fixed volume state of the vehicle, and then in FIG. As shown, the closed end of the V rod 22 is connected to the lower end of both ends of the axles 1 and 2 and one end of the lower rod 9 is connected to position the axles 1 and 2 in the vehicle width direction. Further, as shown in FIG. 7 (c), after the V rod 22 is connected, the other end of the lower rod 9 is connected to the front and rear surfaces of the lower end of the trunnion bracket portion 19 so that Positioning and interposing frame 5 So that to complete a module 28 that is adapted to place each axle 1,2 the proper position without.

  When the trunnion type suspension is assembled using the module 28 assembled in advance as described above, as shown in FIG. 8A, the cross member portion 16 in the cross member integrated trunnion bracket 20 of the module 28 is attached. The frame 5 was sandwiched from the left and right, and bolted to the web of the frame 5 via the attachment portion 21 (see FIGS. 1 and 2), and then the frame 5 was raised as shown in FIG. 8 (b). As a state (or a state in which the axles 1 and 2 are lowered), the leaf spring 6 is moved laterally from the outside in the vehicle width direction and is rotatably attached via the trunnion shaft 17, and as shown in FIG. Returning the frame 5 to the lowered state (or raising the axles 1 and 2 side), the both ends of the leaf spring 6 are connected to both ends of the front and rear axles 1 and 2. It may be to secure the upper.

  Thus, in this way, the front and rear axles 1 and 2 are connected to the cross member integrated trunnion bracket 20 by the V rod 22 and the lower rod 9 without interposing the frame 5, and are combined into one structural unit. Since the module 28 can be used, if the module 28 is assembled in advance in an environment with good workability, the main structure of the trunnion suspension can be obtained at a time by simply assembling the module 28 to the frame 5. Compared to a series of work processes in which various members are assembled in order starting from the frame 5 as in the past, the work efficiency is improved and the work burden required for the assembly work of the trunnion suspension is greatly reduced. Will be.

  In addition, by adopting the cross member integrated trunnion bracket 20 in which the trunnion bracket portion 19 is integrally formed with the cross member portion 16, the relative relationship between the cross member portion 16 and the trunnion bracket portion 19 becomes invariant, and the relative relationship between the two is not changed. Since the conventional displacement does not occur at all, if the front and rear surfaces of both ends of the cross member portion 16 and the upper center portion of the front and rear axles 1 and 2 are respectively connected by the V rods 22, the vehicle of each axle 1 and 2 is connected. When the position in the width direction is accurately determined and the front and rear surfaces of the lower end portion of the trunnion bracket portion 19 and the lower sides of both ends of the front and rear axles 1 and 2 are respectively connected by the parallel link type lower rod 9, each axle 1 , 2 are determined accurately in the front-rear direction.

  As a result, there is almost no possibility that the axles 1 and 2 are inclined in the front-rear direction or laterally shifted in the vehicle width direction and are not placed at their proper proper positions, and alignment adjustment is almost performed when the module 28 is assembled. This eliminates the need for labor and time required for the conventional alignment adjustment, and further reduces the work load.

  In addition, the reduction in assembly man-hours due to the cross member and the left and right trunnion brackets, which have been conventionally divided into three parts, becoming one part as the cross member integrated trunnion bracket 20 also contributes to a reduction in work load. .

  Therefore, according to the above embodiment, the front and rear axles 1 and 2 are connected to the cross member integrated trunnion bracket 20 by the V rod 22 and the lower rod 9 without interposing the frame 5, and are combined into one structural unit. 28, the main structure of the trunnion suspension can be assembled at a time by simply assembling the module 28 to the frame 5, and a series of various members are assembled in order based on the frame 5 as in the prior art. Compared with the work process, the work load can be greatly reduced.

  Further, since the trunnion bracket portion 19 is integrally formed with the cross member portion 16, the relative relationship between them is eliminated, and the vehicle rod direction of each axle 1, 2 is connected by the V rod 22 and the parallel link type lower rod 9. In addition, since the position in the front-rear direction can be accurately determined, alignment adjustment can be made almost unnecessary at the stage where the module 28 is assembled, and the labor and time required for this type of alignment adjustment are greatly reduced. The work burden can be further reduced.

  Furthermore, the cross member and the left and right trunnion brackets that have been divided into three parts in the past are made into one part as a cross member integrated trunnion bracket 20, which can greatly reduce the number of parts and the number of assembly steps. The work burden can be further reduced.

  The trunnion-type suspension module of the present invention and the method of assembling the trunnion-type suspension using the module are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Of course, it can be added.

It is a perspective view which shows an example of the form which implements this invention. It is a front view of FIG. It is a perspective view which shows the example of application to the trunnion type suspension of this embodiment. FIG. 4 is a side view of the trunnion suspension of FIG. 3. FIG. 5 is an arrow view in the VV direction of FIG. 4. It is an enlarged view explaining the attachment state of a reinforcement plate. It is the schematic explaining the assembly procedure of the module of this example. It is the schematic explaining the assembly procedure of the trunnion type suspension of this embodiment. It is a side view showing the structure of a general trunnion type suspension. FIG. 10 is a perspective view of FIG. 9. It is an exploded view of the principal part of FIG. It is a perspective view which shows the detail of the conventional cross member. It is a perspective view which shows the detail of the conventional trunnion bracket.

Explanation of symbols

1 axle 2 axle 5 frame 6 leaf spring 9 lower rod 16 cross member 17 trunnion shaft 19 trunnion bracket 20 cross member integrated trunnion bracket 22 V rod 28 module

Claims (2)

  A pair having a cross member portion that connects the left and right frames, and a boss portion that is integrally formed so as to open outward in the vehicle width direction as it goes downward on the lower surfaces of both end portions of the cross member portion and that supports the trunnion shaft. A cross member integrated trunnion bracket having a trunnion bracket portion, and connecting the cross member portion and the front and rear axles by V rods, and the front and rear surfaces of the lower end portion of the trunnion bracket portion and the front and rear A trunnion-type suspension module, characterized in that a lower end of both ends of each axle is connected by a parallel link type lower rod to be combined into one structural unit.   The trunnion-type suspension module according to claim 1 is assembled in advance, and the cross member portion of the cross member integrated trunnion bracket of the module is sandwiched and fastened from the left and right by the frame, and then the cross member of the module is integrated. A trunnion-type suspension comprising a trunnion-type suspension, wherein a central portion of a leaf spring is rotatably attached to a trunnion bracket portion of a body-type trunnion bracket via a trunnion shaft, and both end portions of the leaf spring are fixed to upper sides of both front and rear axles. Assembly method.

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