Commercial vehicle intermediate transmission shaft assembly

Abstract

The utility model provides an intermediate transmission shaft assembly of a commercial vehicle in order to solve the problem that an intermediate bearing assembly is abraded due to the fact that an intermediate transmission shaft bears additional torque due to design errors, manufacturing errors and assembly errors. Comprising a transmission shaft connecting disc, a cross shaft universal joint, a shaft tube, a spline shaft, a spline connecting disc and a sleeve intermediate supporting assembly which are sequentially connected, the intermediate supporting assembly is composed of a supporting seat, a buffering disc, a bearing seat and a deep groove ball bearing, and the inner diameter of the bearing seat and the outer ring of the deep groove ball bearing are both of a cambered surface structure and form a knuckle bearing structure. A limiting boss is arranged on an outer ring of the deep groove ball bearing, a limiting groove is formed in the inner wall of the bearing seat, the limiting boss can swing in the limiting groove, an axial check block is fixedly connected into the limiting groove, and the size of an opening formed between the axial check block and the limiting groove is not smaller than that of the limiting boss. And the circumferential rotation of the deep groove ball bearing is limited while the swing of the deep groove ball bearing is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an intermediate transmission shaft assembly of a commercial vehicle. Background Art

[0002] Trucks, dump trucks and some special vehicles have a long wheelbase. In order to increase the critical speed of the drive shaft, avoid resonance and consider the overall layout of the vehicle, 2 to 3 drive shafts are generally arranged. At this time, an intermediate drive shaft is required. Due to the influence of vehicle matching design errors, manufacturing errors and assembly errors, the intermediate drive shaft is often subjected to additional torque after being installed on the vehicle, resulting in abnormal wear of the intermediate support assembly.

[0003] The applicant previously applied for a commercial vehicle drive shaft intermediate support assembly and processing technology with publication number CN 112721626 A. In this scheme, the intermediate support assembly uses a limit spring and a limit steel ball to limit the axial rotation of the outer ring of the deep groove ball bearing, and can compensate for assembly errors. However, when the structure is subjected to large torque or the influence of rain, air, etc. in the external environment, the components are easily damaged, resulting in failure of the overall structure. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an intermediate transmission shaft assembly for a commercial vehicle, and the technical solution adopted is as follows:

[0005] A commercial vehicle intermediate transmission shaft assembly comprises a transmission shaft connecting plate, a cross shaft universal joint, a shaft tube, a spline shaft, a spline connecting plate and an intermediate support assembly sleeved on the outside of the spline shaft, the spline shaft and the spline connecting plate being connected in sequence, wherein the spline shaft and the spline connecting plate are tightened and fixedly connected by locking bolts, and the intermediate support assembly comprises a support seat, a buffer plate, a bearing seat and a deep groove ball bearing, the inner diameter of the bearing seat and the outer ring of the deep groove ball bearing are both arc surface structures and form a joint bearing structure, the outer ring of the deep groove ball bearing is provided with a limiting boss, the inner wall of the bearing seat is provided with a limiting groove corresponding to the limiting boss, the limiting groove is larger than the limiting boss in the circumferential direction, and the limiting boss can swing in the limiting groove.

[0006] Furthermore, the limiting groove is axially distributed at a certain depth from one end of the bearing seat close to the spline connecting disk to the other end, and an axial stopper is fixedly connected to the limiting groove close to the spline connecting disk, and the opening size formed between the axial stopper and the limiting groove is not smaller than the limiting boss.

[0007] Furthermore, the size of the opening formed between the limiting groove and the axial stopper is equal to that of the limiting boss.

[0008] Furthermore, the limiting grooves and limiting bosses are symmetrically arranged in at least two groups.

[0009] The beneficial effects of the utility model are:

[0010] 1. A joint bearing structure is formed between the bearing seat and the deep groove ball bearing. The deep groove ball bearing can swing freely to compensate for the influence of assembly error on the intermediate support assembly, thereby avoiding abnormal wear of the buffer disk due to additional torque;

[0011] 2. The deep groove ball bearing and the bearing seat are matched and limited by the limiting boss and limiting groove to avoid the axial rotation of the deep groove ball bearing, and can swing to a certain extent, thereby solving the problem of transmission shaft assembly error;

[0012] 3. An axial stopper is arranged in the limiting groove, which can limit the deep groove ball bearing axially and reduce the probability of the deep groove ball bearing axially coming out. Moreover, when the limiting boss swings to the opening position formed between the axial stopper and the limiting groove, it can slide out axially, thereby facilitating the assembly of the deep groove ball bearing and the subsequent maintenance and replacement of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional structural diagram of the utility model

[0014] Figure 2 This is a partial cross-sectional view of the utility model

[0015] Figure 3 Schematic diagram of the three-dimensional structure of the intermediate support assembly

[0016] Figure 4 Partial cross-sectional view of the intermediate support assembly

[0017] Figure 5 Schematic diagram of the distribution of limiting grooves and axial stops

[0018] Among them, 1-drive shaft connecting plate, 2-cross shaft universal joint, 3-shaft tube, 4-spline shaft, 5-intermediate support assembly, 6-spline connecting plate, 7-locking bolt, 8-support seat, 9-buffer plate, 10-bearing seat, 11-deep groove ball bearing, 12-intermediate support cover plate, 13-limiting groove, 14-limiting boss, 15-axial stopper. DETAILED DESCRIPTION

[0019] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0020] In the description of the utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the viewing direction or position relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0021] like Figure 1 and Figure 2 The intermediate transmission shaft assembly of the commercial vehicle shown includes a transmission shaft connecting plate 1, a cross shaft universal joint 2, a shaft tube 3, a spline shaft 4, an intermediate support assembly 5, and a spline connecting plate 6. The transmission shaft connecting plate 1 is hingedly connected to the left end of the shaft tube 3 through the cross shaft universal joint 2, the spline shaft 4 is coaxially fixedly connected to the other end of the shaft tube 3, and the intermediate support assembly 5 is sleeved on the outside of the spline shaft 4, the spline connecting plate 6 is fixedly connected to the right end of the spline shaft 4, and bolt holes correspondingly distributed in positions are provided on the right end of the spline shaft 4 and the spline connecting plate 6, and the two are fixedly connected by a locking bolt 7.

[0022] like Figures 3 to 5 The intermediate support assembly 5 shown is composed of a support seat 8, a buffer plate 9, a bearing seat 10, a deep groove ball bearing 11 and an intermediate support cover plate 12. The buffer plate 9 is made of polyurethane material and is fixedly connected to the inside of the support seat 8. The bearing seat 10 is fixedly connected to the inside of the buffer plate 9. The outer diameter of the outer ring of the deep groove ball bearing 11 and the inner diameter of the bearing seat 10 are both arc surfaces, and the two form a joint bearing structure. Two groups of limit grooves 13 distributed symmetrically on the inner diameter of the bearing seat 10 are provided, and two groups of limit bosses 14 distributed symmetrically on the outer ring of the deep groove ball bearing 11 are provided. Figure 5 As shown, the right end of the limiting groove 13 is an end face of the bearing seat 10 close to the spline connecting disk 6. The limiting groove 13 is distributed from right to left, but does not pass through the left end of the bearing seat 10. The size of the limiting groove 13 in the circumferential direction is larger than the limiting boss 14. Therefore, the limiting boss 14 can swing a certain angle in the limiting groove 13, thereby realizing a certain degree of swing of the deep groove ball bearing 11 in the bearing seat 10, but it cannot rotate axially. In addition, an axial stopper 15 is fixedly connected to the right end of the limiting groove 13. The opening size formed by the axial stopper 15 and the limiting groove 13 is the same as or slightly larger than the size of the limiting boss 14. When the limiting boss 14 swings to the opening position, the deep groove ball bearing 11 can slide axially out of the bearing seat 10, thereby facilitating the assembly, maintenance and replacement of the deep groove ball bearing 11. When it swings to the other positions, the axial stopper 15 can block the axial movement of the deep groove ball bearing 11, thereby reducing the probability of axial disengagement of the deep groove ball bearing 11 in the working state.

[0023] The device forms a joint bearing structure through the bearing seat 10 and the deep groove ball bearing 11. The deep groove ball bearing 11 can swing freely to compensate for the influence of the assembly error on the intermediate support assembly 5, thereby avoiding abnormal wear of the buffer plate 9 caused by the additional torque; through the cooperation of the set limiting groove 13 and the limiting boss 14, the outer ring of the deep groove ball bearing 16 can be limited to swing only and cannot rotate axially, so as to solve the assembly error problem of the transmission shaft, and compared with the limiting structure of the limiting spring and the limiting steel ball, this structure has high reliability and can reduce the failure probability of the device. At the same time, an axial stopper 15 is set in the limiting groove 13 to limit the axial position of the deep groove ball bearing 11, effectively reducing the axial disengagement probability of the deep groove ball bearing 11.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A commercial vehicle intermediate transmission shaft assembly, comprising a transmission shaft connecting plate, a cross shaft universal joint, a shaft tube, a spline shaft, a spline connecting plate and an intermediate support assembly sleeved on the outer side of the spline shaft, wherein the spline shaft and the spline connecting plate are connected and fixed by tightening bolts, characterized in that: The intermediate support assembly is composed of a support seat, a buffer plate, a bearing seat and a deep groove ball bearing. The inner diameter of the bearing seat and the outer ring of the deep groove ball bearing are both arc surface structures and form a joint bearing structure. The outer ring of the deep groove ball bearing is provided with a limiting boss, and the inner wall of the bearing seat is provided with a limiting groove corresponding to the limiting boss. The size of the limiting groove in the circumferential direction is larger than the limiting boss, and the limiting boss can swing in the limiting groove.

2. The intermediate transmission shaft assembly for a commercial vehicle according to claim 1, characterized in that: The limiting groove is axially distributed at a certain depth from one end of the bearing seat close to the spline connecting disk to the other end, and an axial stopper is fixedly connected to the limiting groove close to the spline connecting disk, and the opening size formed between the axial stopper and the limiting groove is not smaller than the limiting boss.

3. The intermediate transmission shaft assembly for a commercial vehicle according to claim 2, characterized in that: The opening size formed between the limiting groove and the axial stopper is equal to the limiting boss.

4. The commercial vehicle intermediate transmission shaft assembly according to any one of claims 1 to 3, characterized in that: The limiting grooves and limiting bosses are symmetrically arranged in at least two groups.

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