A transmission shaft intermediate support structure

Abstract

The present invention proposes an intermediate support structure for a transmission shaft, comprising an inner sleeve, an outer sleeve, and a rubber body. The inner sleeve is coaxially arranged inside the outer sleeve, and the inner sleeve and outer sleeve are connected to each other by the rubber body to form a whole. A port at one end of the inner sleeve has an inwardly folded flange. The inner sleeve is fully covered by the rubber body and has a bearing mounting hole formed inside thereof for press-fitting a bearing. An annular groove coaxial with the bearing mounting hole is provided on the inner side of the bearing mounting hole, away from the port at one end of the inwardly folded flange. The present invention effectively ensures the axial stability of the bearing within the bearing mounting hole, thereby guaranteeing the stability of the support structure in supporting the transmission shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile accessories, and in particular to an intermediate supporting structural component of a transmission shaft. Background Art

[0002] An automotive powertrain typically consists of an engine, transmission, transfer case, drive shaft, final drive, differential, and axle shafts. The drive shaft transmits engine power from the front axle transfer case to the rear axle final drive. If the distance between the front and rear axles is long, a two- or even three-stage drive shaft is required. In this case, an intermediate drive shaft support is required at the joint of the segmented drive shaft. The primary function of the intermediate drive shaft support structure is to provide suspension support between the segmented drive shaft and the vehicle chassis, while also withstanding the axial, radial, circumferential, and swinging moments exerted by the drive shaft. A high-performance intermediate drive shaft support structure must not only stably withstand the displacement and swing angle caused by these forces, but also be durable, low in vibration, and low in noise. However, current intermediate drive shaft support structures are limited by their structure, and the internal bearings are prone to axial movement. Summary of the Invention

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes an intermediate support structure of a transmission shaft.

[0004] The present invention provides an intermediate support structure for a transmission shaft, comprising an inner sleeve, an outer sleeve and a rubber body, wherein:

[0005] The inner sleeve is coaxially arranged on the inner side of the outer sleeve, and the inner sleeve and the outer sleeve are connected to each other through a rubber body to form a whole, and the port at one end of the inner sleeve has an inner flange formed by folding inward, the inner sleeve is fully covered by the rubber body and a bearing mounting hole for pressing the bearing into is formed on the inner side thereof, and an annular groove coaxial with the bearing mounting hole is provided on the inner side of the bearing mounting hole away from the port at one end of the inner flange.

[0006] Preferably, the side wall of the annular groove away from the inner flange is a sloped wall inclined toward the inner flange.

[0007] Preferably, an annular auxiliary groove coaxial with the inner ring surface of the bearing mounting hole is provided at the junction of the inner ring surface and the surface where the inner flange is located.

[0008] Preferably, the rubber body includes a coating layer 1 coated on the inner wall surface and the outer wall surface of the inner sleeve, a coating layer 2 coated on the inner wall surface of the outer sleeve, and a connecting portion connecting the coating layer 1 and the coating layer 2, and the connecting portion is in the shape of an arch bridge.

[0009] Preferably, the port at one end of the outer sleeve has an outer flange formed by folding outward, and the outer flange and the inner flange are located at the same end of the bearing mounting hole.

[0010] In the present invention, the inner sleeve is fully covered by a rubber body and a bearing mounting hole for pressing the bearing into is formed on its inner side, and an inner flange is provided at the port at one end of the inner sleeve, and an annular groove coaxial with the inner side of the bearing mounting hole away from the port at one end of the inner flange is provided. When the bearing is pressed into the bearing mounting hole, the inner flange and the annular groove cooperate with each other to make one end of the pressed bearing abut against the position where the inner flange is located, and the other end can abut against the side wall of the annular groove away from the inner flange, thereby ensuring the axial stability of the bearing in the bearing mounting hole, and then ensuring the stability of the support structure for the drive shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a cross-sectional view of an intermediate support structure of a transmission shaft proposed by the present invention.

[0012] Figure 2 This is an axonometric view of an intermediate support structure of a transmission shaft proposed in the present invention.

[0013] Figure 3 This is a schematic diagram of the working principle of the annular groove in the intermediate support structure of the transmission shaft proposed by the present invention. DETAILED DESCRIPTION

[0014] Reference Figure 1-2 The present invention proposes a transmission shaft intermediate support structure, comprising: an inner sleeve 1, an outer sleeve 2 and a rubber body 3, wherein:

[0015] The inner sleeve 1 is coaxially disposed on the inner side of the outer sleeve 2. The inner sleeve 1 and the outer sleeve 2 are connected to form a single unit via a rubber body 3. The port at one end of the inner sleeve 1 has an inner flange 11 folded inwardly. This flange 11 forms a blocking structure at one end of the bearing mounting hole 4 to prevent the bearing from axially escaping from the port. The inner sleeve 1 is fully covered by the rubber body 3 and has a bearing mounting hole 4 formed on its inner side for the bearing to be pressed into. An annular groove 5 coaxial with the bearing mounting hole 4 is provided on the inner side of the port at one end of the bearing mounting hole 4, away from the inner flange 11. This groove 5 forms a blocking structure at the other end of the bearing mounting hole 4 to prevent the bearing from axially escaping from the port. The specific principle of this blocking is as follows:

[0016] Reference Figure 3 Since the rubber body 3 is elastic, when the bearing 6 is pressed into the bearing mounting hole 4, the portion of the rubber body 3 located inside the bearing mounting hole 4 is compressed and squeezed to produce a certain amount of radial compression. Therefore, when the end of the bearing 6 away from the inner flange 11 enters the inner side of the annular groove 5, the side wall of the annular groove 5 away from the inner flange 11 loses the squeezing force of the bearing 6 when the bearing 6 passes over it. Since no radial compression is produced, it will protrude radially from the end of the bearing 6 to form a barrier.

[0017] Specifically: the side wall of the annular groove 5 away from the inner flange 11 is a sloped wall inclined toward the inner flange 11, so that after the bearing 6 is pressed in, the setting of the sloped structure not only facilitates the pressing of the bearing 6, but also can better achieve the blocking effect.

[0018] As can be seen from the above, in the present invention, the inner sleeve 1 is fully covered by the rubber body 3 and a bearing mounting hole 4 for pressing the bearing 6 into is formed on its inner side, and an inner flange 11 is provided at the port at one end of the inner sleeve 1, and an annular groove 5 coaxial with the inner side of the port at one end of the bearing mounting hole 4 away from the inner flange 11 is provided. When the bearing 6 is pressed into the bearing mounting hole 4, the inner flange 11 and the annular groove 5 cooperate with each other to make one end of the pressed-in bearing 6 abut against the position where the inner flange 11 is located, and the other end can abut against the side wall of the annular groove 5 away from the inner flange 11, thereby ensuring the axial stability of the bearing 6 in the bearing mounting hole 4, and then ensuring the stability of the support structure for the drive shaft.

[0019] In addition, in this embodiment, an annular secondary groove 51 coaxial with the inner ring surface of the bearing mounting hole 4 and the surface where the inner flange 11 is located is provided. The setting of the annular secondary groove 51 can provide a certain space for the deformation of the rubber, so that after the bearing 6 is pressed in, its end can better rest against the blocking surface formed by the inner flange 11.

[0020] In this embodiment, the rubber body 3 includes a coating layer 1 31 coated on the inner wall surface and the outer wall surface of the inner sleeve 1, a coating layer 2 32 coated on the inner wall surface of the outer sleeve 2, and a connecting portion 33 connecting the coating layer 1 31 and the coating layer 2 32, and the connecting portion 33 is in the shape of an arch bridge. The arch bridge-shaped structure can better absorb the vibration of the drive shaft and reduce noise.

[0021] In this embodiment, the port at one end of the outer sleeve 2 has an outer flange 21 folded outward, and the outer flange 21 and the inner flange 11 are located at the same end of the bearing mounting hole 4. This structural design can effectively enhance the axial strength of the support structure and increase the difficulty of peeling the rubber body 3.

[0022] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A transmission shaft intermediate support structure, characterized in that: include: An inner sleeve (1), an outer sleeve (2) and a rubber body (3), wherein: The inner sleeve (1) is coaxially arranged on the inner side of the outer sleeve (2), and the inner sleeve (1) and the outer sleeve (2) are connected to each other through a rubber body (3) to form a whole, and the port at one end of the inner sleeve (1) has an inner flange (11) folded inwardly, and the inner sleeve (1) is fully covered by the rubber body (3) and a bearing mounting hole (4) for pressing the bearing into is formed on the inner side thereof, and an annular groove (5) coaxial with the inner flange (11) is provided on the inner side of the bearing mounting hole (4) away from the port at one end thereof; The side wall of the annular groove (5) away from the inner flange (11) is a sloped wall inclined toward the inner flange (11); A coaxial annular auxiliary groove (51) is provided at the junction of the inner ring surface of the bearing mounting hole (4) and the surface where the inner flange (11) is located.

2. The intermediate support structure of the transmission shaft according to claim 1, characterized in that: The rubber body (3) includes a coating layer 1 (31) coated on the inner wall surface and the outer wall surface of the inner sleeve (1), a coating layer 2 (32) coated on the inner wall surface of the outer sleeve (2), and a connecting portion (33) connecting the coating layer 1 (31) and the coating layer 2 (32), wherein the connecting portion (33) is in the shape of an arch bridge.

3. The intermediate support structure of the transmission shaft according to any one of claims 1 to 2, characterized in that: The port at one end of the outer sleeve (2) has an outer flange (21) folded outwards, and the outer flange (21) and the inner flange (11) are located at the same end of the bearing mounting hole (4).

Images