A split bearing carrier for a drive shaft

Abstract

The utility model provides a kind of driving shaft split type bearing support, including detachably connected fixed base and fixed support, the fixed base and fixed support are formed using conventional machining equipment;The fixed support is provided with shaft hole for installing driving shaft bearing;The fixed base is provided with a plurality of positioning holes for installing fixed base.The utility model is split into the fixed base and fixed support that can be formed using conventional machining equipment by bearing support, this design breaks the restriction that traditional bearing support must rely on five-pyramidal precision CNC machine tool processing or mold casting, so that the parts of bearing support after splitting can be processed and assembled using widely popular ordinary equipment such as lathe, milling, planing and grinding, greatly reduces the manufacturing cost of bearing support, effectively shortens the part processing time, meets the needs of initial project rapid trial verification.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a split-type bearing support for a drive shaft. Background Technology

[0002] Currently, the conventional installation position of the transmission in domestic passenger vehicles is biased towards the left. New energy electric vehicles are generally designed with a first gear ratio, which simplifies the transmission connection structure of the gear set and makes the appearance more concise. These popular designs result in the structural characteristics of the vehicle's transmission system with a shorter left drive shaft and a longer right drive shaft. In order to improve the transmission stability of the right drive shaft assembly and improve the vehicle's NVH performance such as noise, abnormal noise and vibration, most OEMs add bearing support auxiliary support design to the longer right drive shaft assembly in the chassis power system, especially in new energy electric vehicles and large-displacement fuel vehicles with large wheel spacing (such as SUVs).

[0003] In the early stages of new project development, automotive OEMs typically build test benches or assemble bare vehicles to verify or test the rationality of the overall layout of the powertrain integration and chassis transmission system. The left and right drive shaft assemblies, including bearing supports, are an essential component in the early verification process.

[0004] Since the bearing support is an irregularly shaped part, it cannot be directly formed using ordinary machining equipment (such as turning, milling, planing, grinding, wire cutting, etc.). If a mold is used to cast the bearing support, it usually takes 40 to 50 days to open the mold, which will greatly affect the efficiency of early verification bench equipment or bare car assembly.

[0005] Currently, in the development of new car projects, most domestic OEMs actually forge aluminum ingot blanks first, and then carve out the required bearing support parts on a five-sided precision CNC machine tool. Although this processing method is efficient, the manufacturing cost is too high because it requires the use of a five-sided precision CNC machine tool (average manufacturing cost is about 0.5kg / 4000 yuan / piece).

[0006] Therefore, there is an urgent need to develop a bearing support that is low in manufacturing cost and highly efficient. Utility Model Content

[0007] This invention proposes a split-type bearing support for drive shafts, which solves the problem in the prior art that the production of bearing supports cannot simultaneously achieve high efficiency and low cost in the early stages of new project development.

[0008] The technical solution of this utility model is implemented as follows:

[0009] This utility model provides a split-type bearing support for a drive shaft, including a detachably connected fixed base and a fixed support. Both the fixed base and the fixed support are machined using conventional machining equipment. The fixed support has a shaft hole for installing the drive shaft bearing. The fixed base has several positioning holes for installing the fixed base.

[0010] Preferably, a bushing is provided inside the positioning hole, and the length of the bushing protruding from the bottom surface of the fixed base corresponds to the height deviation of the mounting surface of the positioning hole.

[0011] Furthermore, the bushing and the positioning hole are connected by an interference fit and are assembled by press fitting.

[0012] Specifically, the bottom surface of the fixed support is provided with a plurality of first connecting holes, and the top surface of the fixed base is provided with a plurality of second connecting holes, and the first connecting holes and the second connecting holes are connected by screws.

[0013] Preferably, the fixed base includes a first base and a second base, wherein the mounting surface of the positioning hole on the first base and the mounting surface of the positioning hole on the second base have a height deviation.

[0014] Furthermore, the first connecting hole is provided in two sets, each set including at least two connecting holes; the second connecting hole is provided in two sets, respectively opened on the first base and the second base, and the two sets of the first connecting holes are respectively connected to the two sets of the second connecting holes by screws.

[0015] Preferably, a connecting block is connected between the fixed base and the fixed support. The connecting block is formed by conventional machining equipment, and the thickness of the connecting block is used to compensate for the height deviation between the center of the shaft hole and the mounting surface of the positioning hole.

[0016] Furthermore, the bottom surface of the connecting block is provided with a plurality of third connecting holes and fourth connecting holes, the third connecting holes being connected to the second connecting holes by screws, and the fourth connecting holes being connected to the first connecting holes by screws.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) This utility model breaks the limitation that traditional bearing supports must rely on five-sided precision CNC machine tools for processing or mold casting by disassembling the bearing support into a fixed base and a fixed support that can be formed by conventional machining equipment. This design enables the disassembled parts of the bearing support to be processed and assembled using widely available common equipment such as turning, milling, planing, and grinding, which greatly reduces the manufacturing cost of the bearing support and effectively shortens the processing time of the parts, meeting the needs of rapid trial production and verification in the early stage of the project.

[0019] (2) By setting a bushing in the positioning hole and matching the height deviation of the mounting surface, this utility model cleverly uses a simple and reliable bushing structure to compensate for the height deviation problem that may exist on the bearing support mounting surface (usually connected to the gearbox housing or subframe); by the length of the bushing exposed on the bottom surface, it can be ensured that the bearing support can be firmly fixed on the mounting surface with a small height difference, ensuring the accuracy of the shaft hole center position, improving the adaptability of the support to the actual installation environment, and eliminating the trouble of customizing complex irregular bases to adapt to different height differences;

[0020] (3) By designing the fixed base as a split structure including the first base and the second base, and the two positioning hole mounting surfaces have a height difference, this utility model directly constructs a basic structure that adapts to mounting surfaces of different heights; the two independent bases allow their respective mounting surfaces to be at different heights, effectively solving the problem that a single integral base is difficult to adapt to mounting planes with large height differences (such as steps or height changes), and further enhancing the adaptability and installation reliability of the bearing support in the complex spatial layout of the chassis.

[0021] (4) By setting a connecting block between the fixed base and the fixed support, the thickness of which is used to compensate for the deviation of the center height of the shaft hole, this utility model further improves the flexibility and adaptability of the entire bearing support. The connecting block is also processed by conventional equipment. By selecting or customizing standard connecting blocks of different thicknesses, the height deviation from the center line of the shaft hole to the mounting surface of the positioning hole can be accurately compensated. This allows the same base and support body to quickly adapt to the requirements of different vehicle models or different design stages for the support height of the drive shaft by changing the connecting block, which greatly enhances the versatility of the parts and reduces the cost and time of repeated design and processing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an assembly drawing of a split-type bearing support for a drive shaft according to Embodiment 1 of this utility model;

[0024] Figure 2 This is an exploded view of a split-type bearing support for a drive shaft according to Embodiment 1 of this utility model;

[0025] Figure 3 This is an assembly drawing of a split-type bearing support for a drive shaft according to Embodiment 2 of this utility model;

[0026] Figure 4 This is an exploded view of a split-type bearing support for a drive shaft according to Embodiment 2 of this utility model;

[0027] Figure 5 This is an assembly drawing of a split-type bearing support for a drive shaft according to Embodiment 3 of this utility model;

[0028] Figure 6 This is an exploded view of a split-type bearing support for a drive shaft according to Embodiment 3 of this utility model;

[0029] In the diagram: 1. Fixed base; 2. Fixed support; 3. Shaft hole; 4. Positioning hole; 5. Bushing; 6. First connecting hole; 7. Second connecting hole; 8. First base; 9. Second base; 10. Connecting block; 11. Third connecting hole; 12. Fourth connecting hole. Detailed Implementation

[0030] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] Since bearing supports only play an auxiliary support role in the drive shaft assembly and are not subjected to applied torque in the axial direction, only experiencing small radial forces caused by runout due to installation or manufacturing errors, the purpose of this utility model is to adopt a combined structure design for bearing supports that require long mold opening time or high-cost machining using hollow engraving. Under the premise of ensuring its performance, this design breaks down a complex component into multiple relatively simple parts, and completes the machining of the combined bearing support with a lower production cycle (1 week of working days) and manufacturing cost (approximately 200 yuan / piece) under general machining equipment conditions. This facilitates the timely early verification of various power systems by the main engine manufacturer in the early stages of new project development.

[0032] Reference Figure 1-6 This embodiment provides a split bearing support for a drive shaft, including a detachably connected fixed base 1 and a fixed support 2. Both the fixed base 1 and the fixed support 2 are machined using conventional machining equipment (such as turning, milling, planing, grinding, wire cutting, etc.). The fixed support 2 has a shaft hole 3 for installing the drive shaft bearing. The fixed base 1 has several positioning holes 4 (three in this embodiment) for installing the fixed base 1.

[0033] This invention breaks the limitation that traditional bearing supports must rely on precision CNC machine tools or mold casting to disassemble the bearing support into a fixed base 1 and a fixed support 2 that can be formed using conventional machining equipment. This design allows the disassembled parts of the bearing support to be processed and assembled using widely available common equipment such as lathes, milling machines, planers, and grinders, which greatly reduces the manufacturing cost of the bearing support and effectively shortens the processing time of the parts, meeting the needs of rapid trial production and verification in the early stage of the project.

[0034] Specifically, the bottom surface of the fixed support 2 is provided with a plurality of first connecting holes 6, and the top surface of the fixed base 1 is provided with a plurality of second connecting holes 7. The first connecting holes 6 and the second connecting holes 7 are connected by screws.

[0035] Example 1

[0036] like Figure 1 , 2 As shown in this embodiment, in order to adapt to the installation environment where there is a small height difference on the mounting surface of the fixed base 1, a bushing 5 is provided in the positioning hole 4. The length of the bushing 5 protruding from the bottom surface of the fixed base 1 corresponds to the height deviation of the mounting surface of the positioning hole 4. The height of the bushing 5 is used to compensate for the height deviation of the corresponding mounting surfaces of the three positioning holes 4.

[0037] Furthermore, the bushing 5 and the positioning hole 4 are connected by an interference fit.

[0038] This embodiment cleverly uses a simple and reliable bushing 5 structure to compensate for the potential height deviation of the bearing support mounting surface (which is usually connected to the gearbox housing or subframe) by setting a bushing 5 inside the positioning hole 4, and the length of the bushing 5 matches the height deviation of the mounting surface. The length of the bushing 5 exposed on the bottom surface can ensure that the bearing support can be firmly fixed even on mounting surfaces with small height differences, ensuring the accuracy of the center position of the shaft hole 3, improving the adaptability of the support to the actual installation environment, and eliminating the trouble of customizing complex irregular bases to adapt to different height differences.

[0039] Example 2

[0040] like Figure 3 , 4 As shown, in order to adapt to the installation environment where there is a large height difference on the mounting plane of the fixed base 1, this embodiment provides a split bearing support for the drive shaft. The difference from the above embodiment 1 is that the fixed base 1 includes a first base 8 and a second base 9, and there is a height deviation between the mounting surface of the positioning hole 4 on the first base 8 and the mounting surface of the positioning hole 4 on the second base 9.

[0041] In this embodiment, the first base 8 is similar to a "Z" shaped structure and is a three-section structure. The first section has a second connecting hole 7 to connect with the fixed support 2, and the third section has a positioning hole 4 to connect with the gearbox housing or subframe. The second section is integrally connected with the first and third sections, and there is a height difference between the first and third sections to compensate for the height difference of the mounting surfaces of different positioning holes 4 on the fixed base 1.

[0042] Furthermore, the first connecting hole 6 is provided in two sets, each set including at least two connecting holes (in this embodiment, each set of the first connecting hole 6 has two connecting holes); the second connecting hole 7 is provided in two sets (in this embodiment, each set of the second connecting hole 7 has two connecting holes), which are respectively opened on the first base 8 and the second base 9, and the two sets of the first connecting holes 6 are respectively connected to the two sets of the second connecting holes 7 by screws.

[0043] In this embodiment, the fixed base 1 is designed as a split structure comprising a first base 8 and a second base 9, with a height difference between the mounting surfaces of the two positioning holes 4. This design directly constructs a basic structure that adapts to mounting surfaces of different heights. The two independent bases allow their respective mounting surfaces to be at different heights, effectively solving the problem that a single integral base is difficult to adapt to mounting surfaces with large height differences (such as steps or height changes), and further enhancing the adaptability and installation reliability of the bearing support in the complex spatial layout of the chassis.

[0044] Example 3

[0045] like Figure 5 , 6 As shown, in order to compensate for the height deviation between the center line of the shaft hole 3 and the mounting surface of the positioning hole 4, this embodiment provides a split bearing support for the drive shaft. The difference from the embodiments 1 and 2 above is that a connecting block 10 is connected between the fixed base 1 and the fixed support 2. The connecting block 10 is formed by conventional machining equipment. The thickness of the connecting block 10 is used to compensate for the height deviation between the center of the shaft hole 3 and the mounting surface of the positioning hole 4.

[0046] Furthermore, the bottom surface of the connecting block 10 is provided with a plurality of third connecting holes 11 and fourth connecting holes 12 (in this embodiment, the number of third connecting holes 11 and fourth connecting holes 12 is two each). The third connecting hole 11 is connected to the second connecting hole 7 by screws, and the fourth connecting hole 12 is connected to the first connecting hole 6 by screws.

[0047] In this embodiment, the thickness of the connecting block 10 must be determined based on the height of the drive shaft center from the bearing support mounting reference surface. The key point of the design of the connecting hole on the connecting block 10 is that the depth and position of the hole must not affect the accuracy of the shaft hole 3 and the screw tightening torque.

[0048] In this embodiment, a connecting block 10 is set between the fixed base 1 and the fixed support 2. The thickness of the connecting block 10 is used to compensate for the center height deviation of the shaft hole 3. This design further enhances the flexibility and adaptability of the entire bearing support. The connecting block 10 is also processed by conventional equipment. By selecting or customizing standard connecting blocks 10 of different thicknesses, the height deviation from the center line of the shaft hole 3 to the mounting surface of the positioning hole 4 can be accurately compensated. This allows the same base and support body to quickly adapt to the requirements of different vehicle models or different design stages for the support height of the drive shaft by replacing the connecting block 10. This greatly enhances the versatility of the parts and reduces the cost and time of repeated design and processing.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A split-type bearing support for a drive shaft, characterized in that, The device includes a detachable fixed base (1) and a fixed support (2), both of which are machined using conventional machining equipment. The fixed support (2) has a shaft hole (3) for installing a drive shaft bearing. The fixed base (1) has several positioning holes (4) for installing the fixed base (1). The bottom surface of the fixed support (2) has several first connecting holes (6), and the top surface of the fixed base (1) has several second connecting holes (7). The first connecting holes (6) and the second connecting holes (7) are connected by screws.

2. The split-type bearing support for a drive shaft as described in claim 1, characterized in that, A bushing (5) is provided inside the positioning hole (4), and the length of the bushing (5) protruding from the bottom surface of the fixed base (1) corresponds to the height deviation of the mounting surface of the positioning hole (4).

3. A split-type bearing support for a drive shaft as described in claim 2, characterized in that, The bushing (5) and the positioning hole (4) are connected by an interference fit.

4. A split-type bearing support for a drive shaft as described in claim 1, characterized in that, The fixed base (1) includes a first base (8) and a second base (9), and there is a height deviation between the mounting surface of the positioning hole (4) on the first base (8) and the mounting surface of the positioning hole (4) on the second base (9).

5. A split-type bearing support for a drive shaft as described in claim 1, characterized in that, The first connecting hole (6) is provided in two sets, each set including at least two connecting holes; the second connecting hole (7) is provided in two sets, respectively opened on the first base (8) and the second base (9), and the two sets of the first connecting holes (6) are respectively connected to the two sets of the second connecting holes (7) by screws.

6. A split-type bearing support for a drive shaft as described in claim 1, characterized in that, A connecting block (10) is connected between the fixed base (1) and the fixed support (2). The connecting block (10) is formed by conventional machining equipment. The thickness of the connecting block (10) is used to compensate for the height deviation between the center of the shaft hole (3) and the mounting surface of the positioning hole (4).

7. A split-type bearing support for a drive shaft as described in claim 6, characterized in that, The bottom surface of the connecting block (10) is provided with a plurality of third connecting holes (11) and fourth connecting holes (12). The third connecting holes (11) are connected to the second connecting holes (7) by screws, and the fourth connecting holes (12) are connected to the first connecting holes (6) by screws.

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