Needle bearing and tripod constant velocity universal joint with same

Abstract

The utility model relates to the field of constant velocity universal joints, in particular to a needle bearing and a tripod constant velocity universal joint with the needle bearing, which comprise a bearing outer ring, a bearing inner ring, a needle roller and a limit retainer ring. The bearing outer ring comprises an outer ring body; an assembly through hole is formed in the outer ring body; a limiting ring rib is arranged at the edge of the assembly through hole; the limiting ring rib and the limiting check ring are distributed at the two ends of the assembling through hole. One end of the limiting ring rib is connected to the inner wall of the assembly through hole, and the other end extends towards one side close to the central axis of the bearing outer ring; according to the needle bearing disclosed by the utility model, through the arrangement of the limiting ring rib, a limiting check ring on one side of a traditional needle bearing can be replaced, the number of parts of the needle bearing can be reduced on the premise that normal use of the needle bearing is ensured, and then the actual assembly process is simplified.

Description

Technical Field

[0001] The utility model relates to the field of constant velocity universal joints, and more specifically to a needle bearing and a three-ball pin type constant velocity universal joint with the needle bearing. Background Art

[0002] With the rapid development of China's automotive industry and the rapid rise of new energy vehicles in recent years, cars are not only defined as a means of transportation, but also a mobile space for pursuing driving pleasure and comfort.

[0003] As an important part of the vehicle running system, the drive shaft is generally composed of a fixed joint, a shaft rod and a movable joint. Among them, the three-ball pin type universal joint is the most commonly used sliding constant velocity universal joint, and its structure is relatively mature at present.

[0004] At present, there are two types in the industry, namely ordinary joints and high-efficiency joints. Among them, the high-efficiency joints have relatively better NVH performance.

[0005] However, due to structural limitations, during traditional assembly of the three-ball pin type universal joint, there are many assembly processes, resulting in waste of production man-hours.

[0006] The traditional three-ball pin type universal joint has more friction pairs, and it is easy to have a temperature rise during operation, which affects the transmission efficiency.

[0007] At the same time, it is also easy to have problems such as low-speed yaw and high-speed jitter during vehicle driving.

[0008] The existing patent 201520391450.8 - A lightweight three-ball pin type constant velocity universal joint assembly does not clearly disclose the technical content for solving the above technical problems.

[0009] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing three-ball pin type constant velocity universal joint. Summary of the Utility Model

[0010] The purpose of the utility model is to provide a needle bearing structure that is convenient for assembly and applicable to a three-ball pin type constant velocity universal joint.

[0011] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0012] A needle bearing includes an outer bearing ring, an inner bearing ring, needle rollers and a limit retaining ring;

[0013] The outer bearing ring includes an outer ring body; an assembly through hole is provided on the outer ring body;

[0014] A limit ring rib is provided at the edge of the assembly through hole; the limit ring rib and the limit retaining ring are distributed at both ends of the assembly through hole;

[0015] One end of the limiting ring rib is connected to the inner wall of the assembly through hole, and the other end extends towards the side close to the central axis of the bearing outer ring.

[0016] An assembly sink for assembling needle rollers is provided in the assembly through hole.

[0017] A clamping groove for installing a limiting retaining ring is provided on the outer ring body; the clamping groove is arranged at one end of the assembly sink away from the limiting ring rib.

[0018] A three-ball pin constant velocity universal joint includes a moving joint housing, and a three-ball pin bearing assembly is provided in the moving joint housing; the three-ball pin bearing assembly includes a three-pin bracket, and a journal is provided on the three-pin bracket; one of the needle bearings is provided on each journal.

[0019] The outer side surface of the journal is an arc surface.

[0020] The moving joint housing includes a housing body, the interior of the housing body is hollow to form a storage cavity, and a bearing raceway is provided on the inner wall of the storage cavity.

[0021] An avoidance sink for avoiding the journal is provided on the bearing raceway.

[0022] The advantages of the present utility model are as follows;

[0023] The present utility model discloses a needle bearing and a three-ball pin constant velocity universal joint having the needle bearing.

[0024] For the needle bearing disclosed by the present utility model, through the arrangement of the limiting ring rib, it can replace the limiting retaining ring on one side of the traditional needle bearing. On the premise of ensuring the normal use of the needle bearing, the number of components of the needle bearing can be reduced, and thus the actual assembly process can be simplified.

[0025] For the three-ball pin constant velocity universal joint using the needle bearing; by canceling the axial limiting retaining ring on one side of the traditional needle bearing; not only can the friction pairs inside the bearing be reduced, the temperature rise during the operation of the universal joint be reduced, the transmission efficiency of the universal joint be improved, and the axial derived force be reduced, but also the vehicle NVH problems caused by the drive shaft can be reduced or optimized: such as low-speed yaw and high-speed jitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following briefly describes the content expressed in each drawing of the specification of the present utility model and the marks in the drawings:

[0027] Figure 1 It is a schematic structural diagram when the needle bearing of the present utility model is connected to the journal.

[0028] Figure 2 It is an axonometric view of the three-ball pin constant velocity universal joint in the present utility model.

[0029] Figure 3 This is the front view of the tripod constant velocity joint in the present utility model.

[0030] Figure 4 This is the structural schematic diagram of the moving joint housing in the present utility model.

[0031] The markings in the above figures are all:

[0032] 1. Needle roller bearing, 11. Bearing outer ring, 12. Assembly sinking groove, 13. Assembly through hole, 14. Needle roller, 15. Bearing inner ring, 16. Limit retaining ring, 17. Clamping groove, 18. Limit projection, 2. Tripod, 21. Journal, 3. Moving joint housing. Specific embodiments

[0033] Next, with reference to the accompanying drawings, through the description of the optimal embodiments, the specific embodiments of the present utility model will be further described in detail.

[0034] A needle roller bearing 1 includes a bearing outer ring 11, a bearing inner ring 15, needle rollers 14 and a limit retaining ring 16; the bearing outer ring 11 includes an outer ring body; an assembly through hole 13 is provided on the outer ring body; a limit ring rib 18 is provided at the edge of the assembly through hole 13; the limit ring rib 18 and the limit retaining ring 16 are distributed at both ends of the assembly through hole 13; one end of the limit ring rib 18 is connected to the inner wall of the assembly through hole 13, and the other end extends towards the side close to the axis of the bearing outer ring 11; for the needle roller bearing 1 disclosed in the present utility model, through the setting of the limit ring rib 18, it can replace the limit retaining ring 16 on one side of the traditional needle roller bearing 1, and on the premise of ensuring the normal use of the needle roller bearing 1, the number of parts of the needle roller bearing 1 can be reduced, thereby simplifying the actual assembly process.

[0035] The needle roller bearing 1 disclosed in the present utility model mainly optimizes the design of the structure of the bearing outer ring 11.

[0036] The needle roller bearing 1 disclosed in the present utility model mainly includes a bearing outer ring 11, a bearing inner ring 15, needle rollers 14 and a limit retaining ring 16; the bearing inner ring 15 and the needle rollers 14 can adopt existing conventional structures, and in the present utility model, the bearing outer ring 11 includes an outer ring body; the setting of the outer ring body is the main structure of the bearing outer ring 11, and an assembly through hole 13 is provided on the outer ring body; the setting of the assembly through hole 13 facilitates the subsequent insertion and assembly of the bearing inner ring 15, needle rollers 14 and the subsequent journal 21.

[0037] Meanwhile, a limiting ring rib 18 is provided at the edge of the assembly through hole 13 in the present utility model; the limiting ring rib 18 and the limiting retaining ring 16 are distributed at both ends of the assembly through hole 13; one end of the limiting ring rib 18 is connected to the inner wall of the assembly through hole 13, and the other end extends towards the side close to the central axis of the bearing outer ring 11; the limiting ring rib 18 of the present utility model acts as a limiting member, facilitating the support of the needle roller 14 and the bearing inner ring 15 on one side during subsequent use. With the subsequent setting of the limiting retaining ring 16, the support and limitation of both ends of the needle roller 14 and the bearing inner ring 15 can be realized, thereby realizing the axial limitation of the needle roller 14 and the bearing.

[0038] The outer ring body and the limiting ring rib 18 disclosed in the present utility model are of an integral structure. Based on such a setting, the assembly process of the needle roller bearing 1 can be simplified during subsequent use.

[0039] Furthermore, an assembly sink 12 for assembling the needle roller 14 is provided in the assembly through hole 13 of the present utility model; the assembly sink 12 is equivalent to providing a sink structure on the side of the assembly through hole 13. This assembly sink 12 can be used to store the needle roller 14 structure, and the axial limitation of the needle roller 14 is realized through the assembly sink 12, avoiding the friction between the traditional retaining ring and the needle roller 14.

[0040] Furthermore, a clamping groove 17 for installing the limiting retaining ring 16 is provided on the outer ring body of the present utility model; the clamping groove 17 is arranged at one end of the assembly sink 12 away from the limiting ring rib 18; the clamping groove 17 of the present utility model plays a role of limitation and positioning; it not only facilitates the assembly and positioning of the limiting retaining ring 16 on the outer ring body, but also can realize the end limitation of the bearing inner ring 15 through the limitation of the position of the limiting retaining ring 16 by the clamping groove 17.

[0041] A three-ball pin constant velocity universal joint includes a moving joint housing 3, and a three-ball pin bearing assembly 1-1 is provided in the moving joint housing 3; the three-ball pin bearing assembly 1-1 includes a three-pin bracket 2, and a journal 21 is provided on the three-pin bracket 2; each journal 21 is provided with one of the needle roller bearings 1; for the three-ball pin constant velocity universal joint using this needle roller bearing 1; by canceling the axial limiting retaining ring 16 on one side of the traditional needle roller bearing 1; not only can the friction pairs inside the bearing be reduced, the temperature rise during the operation of the universal joint be lowered, the transmission efficiency of the universal joint be improved, and the axial derivative force be reduced, but also the vehicle NVH problems caused by the drive shaft can be reduced or optimized, such as low-speed yaw and high-speed jitter.

[0042] Furthermore, the outer side surface of the journal 21 in the present utility model is an arc surface; based on the above setting, the outer side surface of the journal 21 can have a smooth transition between surfaces, reducing or avoiding the appearance of edges and reducing the assembly difficulty between the journal 21 and the needle roller bearing 1.

[0043] Further, in the present utility model, the moving joint housing 3 includes a housing body, and a storage cavity 301 is formed inside the housing body in a hollow manner. A bearing raceway 31 is provided on the inner wall of the storage cavity 301. Based on such a setting, it is convenient to install and place the three-ball pin bearing assembly 1-1 in the moving joint housing 3. At the same time, in the present utility model, an avoidance sink 32 is provided on the bearing raceway 31. The avoidance sink 32 is used to avoid the journal. The avoidance sink 32 is provided at the central position of the bearing raceway 31 and is provided at a position on the bearing raceway 31 away from the center of the moving joint housing 3. The avoidance sink 32 plays a good avoidance role, avoiding installation interference between the moving joint housing 3 and the journal 21 during subsequent assembly.

[0044] Specifically:

[0045] The present invention discloses a three-ball pin constant velocity universal joint; there are no rigid requirements for the materials and wall thicknesses of the inner and outer rings of the needle bearing 1 of the present utility model.

[0046] As shown in the figure, the three-pin constant velocity universal joint disclosed by the present utility model mainly includes a moving joint housing 3 and a three-ball pin bearing assembly 1-1.

[0047] Assembly sequence: First, press-fit the needle bearing 1 onto the journal 21 of the three-pin bracket 2. The inner ring 15 of the needle bearing 1 and the journal 21 of the three-pin bracket 2 form a spherical pair, and then the assembled whole is installed into the bearing raceway 31 in the moving joint housing 3.

[0048] The outer ring 11 of the bearing and the bearing raceway 31 are in two-point contact.

[0049] The needle bearing 1 includes an outer ring 11, needles 14, an inner ring 15, and a fiber retaining ring. Assembly sequence: First, assemble the needles 14 into the assembly sink 12 of the outer ring 11, then press the inner ring 15, and finally assemble the axial limit retaining ring 16 on the upper side in place for limiting.

[0050] The needle bearing 1 disclosed by the present utility model reduces the width of the outer ring, and a limit ring rib 18 structure is added inside the outer ring body, which is equivalent to canceling the axial limit retaining ring 16 on the lower side of the traditional inner ring 15. The present utility model uses the mutual cooperation of the limit ring rib 18 and the limit retaining ring 16 to perform end face limiting of the inner ring 15 of the bearing.

[0051] Compared with the original needle roller bearing 1 design, since the original lower axial retaining ring is cancelled, the assembly process of the needle roller bearing 1 is simplified, the cost is reduced. More importantly, on the one hand, the number of friction pairs inside the needle roller bearing 1 is reduced: for example, the friction pair between the bearing outer ring 11 and the axial retaining ring is reduced, thereby reducing the temperature rise during the operation of the constant velocity universal joint and improving the transmission efficiency. On the other hand, due to the reduction of the friction pairs, when the universal joint has a swing angle, the acting force of the bearing inner ring 15 on the needle rollers 14 and the bearing outer ring 11 is reduced, thus reducing the axial derived force generated by the sliding of the three ball pins in the bearing raceway 31 of the moving joint housing 3, and reducing the risk of NVH problems such as low-speed yaw and high-speed jitter of the whole vehicle.

[0052] The advantages of the present utility model are that by cancelling the axial retaining ring on the lower side of the needle roller bearing 1, the number of friction pairs inside the bearing can be reduced, the temperature rise during the operation of the universal joint can be reduced, the transmission efficiency of the universal joint can be improved, and at the same time, the axial derived force can be reduced, optimizing the NVH problems of the whole vehicle caused by the drive shaft: such as low-speed yaw and high-speed jitter.

[0053] During specific implementation:

[0054] Assembly sequence: First, all the needle rollers 14 are installed in the assembly sink 12 of the bearing outer ring 11, then the inner ring is pressed in, and finally the upper axial retaining ring is assembled in place for positioning. Then, the assembled 3 needle roller bearings 1 are press-fitted onto the 3 journal necks 21 of the three-pin bracket 2, and finally the assembled three-ball pin bearing assembly 1-1 is installed into the bearing raceway 31 of the moving joint housing 3.

[0055] Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model, they are all within the protection scope of the present utility model.

Claims

1. A needle roller bearing, characterized in that: It includes a bearing outer ring, a bearing inner ring, a needle roller and a limit ring; The bearing outer ring comprises an outer ring body; the outer ring body is provided with an assembly through hole; A limiting ring rib is provided at the edge of the assembly through hole; the limiting ring rib and the limiting retaining ring are distributed at both ends of the assembly through hole; One end of the limiting ring rib is connected to the inner wall of the assembly through hole, and the other end extends toward a side close to the central axis of the bearing outer ring.

2. A needle roller bearing according to claim 1, characterized in that: An assembly recessed groove for assembling a needle roller is arranged in the assembly through hole.

3. A needle roller bearing according to claim 2, characterized in that: The outer ring body is provided with a clamping groove for installing the limit retaining ring; the clamping groove is arranged at one end of the assembly groove away from the limit ring rib.

4. A tripod type constant velocity universal joint, characterized in that: It comprises a movable joint housing, in which a tripod bearing assembly is arranged; the tripod bearing assembly comprises a tripod frame, on which a journal is arranged; each journal is provided with a needle roller bearing as claimed in any one of claims 1 to 3.

5. A tripod type constant velocity universal joint according to claim 4, characterized in that: The outer side surface of the journal is an arc-shaped surface.

6. A tripod type constant velocity universal joint according to claim 4, characterized in that: The movable joint housing comprises a housing body, the interior of the housing body is hollow to form a storage cavity, and a bearing ball track is arranged on the inner wall of the storage cavity.

7. A tripod type constant velocity universal joint according to claim 6, characterized in that: The bearing ball track is provided with an avoidance groove for avoiding the shaft journal.

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