A drive shaft intermediate support assembly

Abstract

The application relates to a transmission shaft intermediate support assembly which comprises a bottom plate, a U-shaped frame arranged on the bottom plate and a supporting rubber sleeve located between the bottom plate and the U-shaped frame, a bearing seat is arranged in the supporting rubber sleeve, a bearing is arranged in the bearing seat, annular convex portions are arranged on the front and back sides of the supporting rubber sleeve, a limiting annular groove is formed between the two annular convex portions and the inner side of the supporting rubber sleeve, the bearing seat is arranged in the limiting annular groove, a positioning groove is arranged on the inner side of the annular convex portion, a positioning convex portion matched with the positioning groove is arranged on the bearing seat, the bearing comprises an outer ring, an inner ring and rollers arranged between the outer ring and the inner ring, a dustproof assembly for preventing dust is arranged between the outer ring and the inner ring. The application can effectively prevent dust and mud from invading and causing the bearing to fail. Moreover, the application adopts a thin bearing seat to absorb stress, preferentially generate deformation, reduce the deformation of the outer ring of the bearing and improve the bearing play.

Description

Technical Field

[0001] This utility model relates to the field of intermediate support technology, and in particular to an intermediate support assembly for a transmission shaft. Background Technology

[0002] Intermediate bearings are typically mounted on the chassis crossbeams or the vehicle's underframe to compensate for axial and angular installation errors in the driveshaft, as well as displacements caused by engine surging and chassis deformation during vehicle operation. Currently, widely used rubber-based intermediate bearings primarily bear the radial forces caused by driveshaft imbalances and eccentricities, as well as the radial forces caused by additional bending moments on the universal joints. In vehicles operating in harsh environments, the oil seals and bearings within the intermediate bearing are susceptible to dust and mud intrusion, leading to failure. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a transmission shaft intermediate support assembly.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a transmission shaft intermediate support assembly, including a base plate, a U-shaped frame disposed on the base plate, and a support rubber sleeve located between the base plate and the U-shaped frame. A bearing seat is provided inside the support rubber sleeve, and a bearing is disposed inside the bearing seat. Annular protrusions are respectively provided on the front and rear sides of the support rubber sleeve. A limiting annular groove is formed between the two annular protrusions and the inner side of the support rubber sleeve. The bearing seat is disposed in the limiting annular groove. A positioning groove is provided inside the annular protrusions. A positioning protrusion that cooperates with the positioning groove is provided on the bearing seat. The bearing includes an outer ring, an inner ring, and rollers disposed between the outer ring and the inner ring. A dustproof component for dust prevention is provided between the outer ring and the inner ring.

[0005] As a preferred embodiment, the dustproof assembly includes a first dustproof ring disposed on the inner side of the outer ring and a second dustproof ring disposed on the outer side of the inner ring, with a sealing ring provided between the first dustproof ring and the second dustproof ring.

[0006] As a preferred embodiment, the first dustproof ring includes a first vertical portion and a first horizontal portion connected to the first vertical portion, the second dustproof ring includes a second vertical portion and a second horizontal portion connected to the second vertical portion, a sealing ring is sleeved on the first vertical portion, the sealing ring has an inner sealing lip and a middle sealing lip, the inner sealing lip abuts against the second horizontal portion to seal, and the middle sealing lip abuts against the second vertical portion to seal.

[0007] As a preferred embodiment, a cage is provided between the inner and outer rings, and the rollers are held between the inner and outer rings by the cage.

[0008] As a preferred embodiment, the front and rear ends of the supporting rubber sleeve are respectively provided with multiple arc-shaped grooves, and the multiple arc-shaped grooves are distributed in a ring array with the bearing as the center.

[0009] As a preferred embodiment, the bearing housing has a split structure, including a mounting ring cover arranged symmetrically on the left and right sides, a positioning protrusion on the mounting ring cover, and a limiting protrusion for limiting the bearing on the inner side of the mounting ring cover. The limiting protrusion is arc-shaped and there are multiple limiting protrusions, which are arranged in a ring array around the bearing.

[0010] As a preferred option, the supporting rubber sleeve is connected to the U-shaped frame via a locking device, which is a bolt.

[0011] The beneficial effects of this application are as follows: 1. By setting an annular protrusion to cooperate with a positioning groove, and the bearing seat to cooperate with the annular protrusion and the inner side of the supporting rubber sleeve to form a limiting annular groove, the bearing seat is effectively limited and constrained, thereby effectively preventing the bearing seat from moving axially or rotating circumferentially, and ensuring the stability of the structure.

[0012] 2. This application provides a dustproof component, which forms a double seal by having the inner sealing lip abut against the second horizontal part and the middle sealing lip abut against the second vertical part, thereby effectively preventing dust and mud from entering and avoiding bearing failure.

[0013] 3. This application makes it easier to deform the supporting rubber sleeve by setting multiple arc-shaped grooves, thus avoiding stress concentration.

[0014] 4. The bearing housing of this application adopts a split structure, which makes installation and maintenance more convenient. The multiple arc-shaped limiting protrusions on the inner side of the installation ring can form uniform limiting and support for the outer ring of the bearing, ensuring the stability of the bearing rotation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the supporting rubber sleeve in this utility model.

[0017] Figure 3 yes Figure 2 A sectional view.

[0018] Figure 4 This is a schematic diagram of the structure of the bearing and bearing housing in this utility model.

[0019] Figure 5 This is a schematic diagram of the dustproof component in this utility model.

[0020] Figure 6 This is a top view of the mounting ring in this utility model.

[0021] Figure 7 This is a first isometric view of the installation ring cover in this utility model.

[0022] Figure 8 This is a second isometric view of the installation ring cover in this utility model.

[0023] Illustration markings: 1. U-shaped frame, 2. Base plate, 3. Supporting rubber sleeve, 31. Arc-shaped groove, 32. Positioning groove, 33. Annular protrusion, 4. Bearing, 41. Outer ring, 42. Inner ring, 43. Roller, 44. Cage, 5. Bearing housing, 51. Mounting ring cover, 511. Positioning protrusion, 512. Limiting protrusion, 6. Dustproof assembly, 61. First dustproof ring, 611. First horizontal part, 612. First vertical part, 62. Sealing ring, 621. Inner ring sealing lip, 622. Middle sealing lip, 63. Second dustproof ring, 631. Second horizontal part, 632. Second vertical part. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Please see Figure 1-8 This utility model provides a transmission shaft intermediate support assembly, including a base plate 2, a U-shaped frame 1 mounted on the base plate 2, and a support rubber sleeve 3 located between the base plate 2 and the U-shaped frame 1. A bearing seat 5 is provided inside the support rubber sleeve 3, and a bearing 4 is provided inside the bearing seat 5. Annular protrusions 33 are provided on the front and rear sides of the support rubber sleeve 3, respectively. A limiting annular groove is formed between the two annular protrusions 33 and the inner side of the support rubber sleeve 3. The bearing seat 5 is disposed within the limiting annular groove, and a positioning groove 32 is provided inside the annular protrusions 33, thereby restricting it axially. A positioning protrusion 511 is provided on the bearing seat 5 to cooperate with the positioning groove 32. The bearing 4 includes an outer ring 41, an inner ring 42, and rollers 43 disposed between the outer ring 41 and the inner ring 42. A dustproof component 6 for dust prevention is provided between the outer ring 41 and the inner ring 42.

[0026] The dustproof component 6 includes a first dustproof ring 61 disposed inside the outer ring 41 and a second dustproof ring 63 disposed outside the inner ring 42. Both the first dustproof ring 61 and the second dustproof ring 63 have an L-shaped cross-section. A sealing ring 62 is provided between the first dustproof ring 61 and the second dustproof ring 63. The first dustproof ring 61 includes a first vertical portion 612 and a first horizontal portion 611 connected to the first vertical portion 612. The second dustproof ring 63 includes a second vertical portion 632 and a second horizontal portion 631 connected to the second vertical portion 632. The sealing ring 62 is sleeved on the first vertical portion 612 and has an inner sealing lip 621 and a middle sealing lip 622. The inner sealing lip 621 abuts against the second horizontal portion 631 for sealing, and the middle sealing lip 622 abuts against the second vertical portion 632 for sealing. It should be noted that the parts not described in detail in this application are all prior art. The first dustproof ring 61, the sealing ring 62, and the second dustproof ring 63 together form a labyrinth-like sealing structure, which greatly enhances the ability to prevent dust, water, and mud.

[0027] Specifically, a retainer 44 is provided between the inner ring 42 and the outer ring 41, and the roller 43 is held between the inner ring 42 and the outer ring 41 by the retainer 44.

[0028] More specifically, the supporting rubber sleeve 3 has multiple arc-shaped grooves 31 at both its front and rear ends, and these grooves are arranged in a circular array around the bearing 4. The arc-shaped grooves 31 increase the axial deformation capacity of the rubber sleeve, thus facilitating adaptation to displacement caused by vehicle movement and effectively preventing early cracking due to stress concentration. The depth of the arc-shaped grooves 31 is 20mm. The included angle between adjacent arc-shaped grooves 31 is 20 degrees.

[0029] Furthermore, the bearing housing 5 has a split left and right structure, which makes installation and maintenance more convenient. The bearing housing 5 includes a mounting ring cover 51 symmetrically arranged on the left and right sides. The positioning protrusion 511 is provided on the mounting ring cover 51 and is engaged in the positioning groove 32, thereby restricting the circumferential rotation of the bearing housing 5 relative to the supporting rubber sleeve 3 and ensuring the stability of the structure. The inner side of the mounting ring cover 51 is provided with a limiting protrusion 512 for limiting the bearing 4, which can realize the axial limiting of the outer ring 41 of the bearing 4. The limiting protrusion 512 is arc-shaped and there are multiple limiting protrusions 512, which are distributed in a ring array with the bearing 4 as the center. The supporting rubber sleeve 3 is connected to the U-shaped frame 1 by a locking member, which is a bolt. The supporting rubber sleeve 3 can also be connected to the U-shaped frame 1 by vulcanization. The base plate 2 is installed on the crossbeam of the frame by bolts and other fasteners. The surface hardness of the supporting rubber sleeve is HA65±5°, and the tensile strength is not less than 17MPa.

[0030] Furthermore, the thickness of the mounting ring 51 is 1mm, while the thickness of the bearing housing 5 is thin. The outer ring 41 of the bearing 4 and the bearing housing 5 are subjected to action and reaction forces, which can cause microscopic deformation of the outer ring 41, affecting the normal clearance of the bearing 4. Moreover, under the same pressing conditions, this application uses a thinner bearing housing 5 to absorb stress, preferentially causing deformation, reducing the deformation of the outer ring 41 of the bearing 4, and improving the clearance of the bearing 4.

[0031] Currently, some high-end products require drive shafts that can be fitted with bearings of higher precision, but these high-precision bearings currently have small clearances. This application reduces the deformation of the bearing 4 after pressing in by optimizing and thinning the structure of the bearing housing 5, thereby reducing the change in the clearance of the bearing 4 and providing a basis for the use of high-precision bearings.

[0032] During press fitting, the positioning protrusion 511 of the bearing housing 5 should correspond to the direction of the positioning groove 32 of the supporting rubber sleeve 3. After the bearing housing 5 is assembled, it should be ensured that it is properly embedded in the positioning groove 32 of the supporting rubber sleeve 3. After assembly, the bearing 4 should rotate flexibly without jamming, and there should be no obvious torsion between the bearing housing 5 and the supporting rubber sleeve 3.

[0033] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A transmission shaft intermediate support assembly, comprising a base plate (2), a U-shaped frame (1) disposed on the base plate (2), and a support rubber sleeve (3) located between the base plate (2) and the U-shaped frame (1), wherein a bearing seat (5) is provided inside the support rubber sleeve (3), and a bearing (4) is provided inside the bearing seat (5), characterized in that, The front and rear sides of the support rubber sleeve (3) are respectively provided with annular protrusions (33), and a limiting annular groove is formed between the two annular protrusions (33) and the inner side of the support rubber sleeve (3). The bearing seat (5) is set in the limiting annular groove. The inner side of the annular protrusions (33) is provided with a positioning groove (32). The bearing seat (5) is provided with a positioning protrusion (511) that cooperates with the positioning groove (32). The bearing (4) includes an outer ring (41), an inner ring (42) and a roller (43) set between the outer ring (41) and the inner ring (42). A dustproof component (6) for dust prevention is provided between the outer ring (41) and the inner ring (42).

2. The intermediate support assembly for a transmission shaft according to claim 1, characterized in that, The dustproof assembly (6) includes a first dustproof ring (61) disposed inside the outer ring (41) and a second dustproof ring (63) disposed outside the inner ring (42), with a sealing ring (62) between the first dustproof ring (61) and the second dustproof ring (63).

3. The intermediate support assembly for a transmission shaft according to claim 2, characterized in that, The first dustproof ring (61) includes a first vertical part (612) and a first horizontal part (611) connected to the first vertical part (612). The second dustproof ring (63) includes a second vertical part (632) and a second horizontal part (631) connected to the second vertical part (632). The sealing ring (62) is sleeved on the first vertical part (612). The sealing ring (62) has an inner sealing lip (621) and a middle sealing lip (622). The inner sealing lip (621) abuts against the second horizontal part (631) for sealing, and the middle sealing lip (622) abuts against the second vertical part (632) for sealing.

4. The intermediate support assembly for a transmission shaft according to claim 1, characterized in that, A retainer (44) is provided between the inner ring (42) and the outer ring (41), and the roller (43) is held between the inner ring (42) and the outer ring (41) by the retainer (44).

5. The intermediate support assembly for a transmission shaft according to claim 1, characterized in that, The supporting rubber sleeve (3) has multiple arc-shaped grooves (31) at its front and rear ends, and the multiple arc-shaped grooves (31) are arranged in a ring array with the bearing (4) as the center.

6. The intermediate support assembly for a transmission shaft according to claim 1, characterized in that, The bearing housing (5) has a split structure on the left and right sides. The bearing housing (5) includes a mounting ring cover (51) arranged symmetrically on the left and right sides. A positioning protrusion (511) is provided on the mounting ring cover (51). The inner side of the mounting ring cover (51) is provided with a limiting protrusion (512) for limiting the bearing (4). The limiting protrusion (512) is arc-shaped and there are multiple of them. The multiple limiting protrusions (512) are arranged in a ring array with the bearing (4) as the center.

7. The intermediate support assembly for a transmission shaft according to claim 1, characterized in that, The supporting rubber sleeve (3) is connected to the U-shaped frame (1) through a locking component, which is a bolt.

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