Connecting structure of automobile hub bearing and driving shaft outer ball cage

Abstract

The utility model discloses an automobile hub bearing and driving shaft outer ball cage connecting structure which comprises a fastener used for fixedly connecting a hub bearing and a driving shaft outer ball cage, and the hub bearing and the driving shaft outer ball cage are meshed through end face teeth. The outer end face of the driving shaft outer ball cage extends outwards in the axial direction to form a protruding part arranged in the hub bearing in a sleeved mode, and an axial limiting piece is arranged on the peripheral face of the protruding part and used for limiting axial movement of the driving shaft outer ball cage after the driving shaft outer ball cage is assembled in place. The protruding part is additionally arranged on the driving shaft outer ball cage, meanwhile, the axial limiting piece is designed on the protruding part, whether meshing is in place or not can be judged by reversely pulling the driving shaft, misjudgment can be effectively reduced, and the risks of abnormal sound and driving shaft falling can be reduced; meanwhile, during assembling, axial movement of the driving shaft outer ball cage after the driving shaft outer ball cage is assembled in place is limited through the axial limiting part, extra axial pressing force does not need to be exerted by workers, subsequent fastening parts such as the tightening procedure of bolts can be conducted, and the assembling process of the driving shaft is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile component structure design, in particular to a connection structure of an automobile wheel hub bearing and an outer ball cage of a driving shaft. Background Art

[0002] As users' requirements for automobile driving experience continue to increase, in order to reduce abnormal noise when starting the car, the connection structure of the wheel hub bearing and the outer ball cage of the drive shaft of the car has gradually begun to use the connection structure of the end face tooth spline, that is, the wheel hub bearing and the outer ball cage of the drive shaft are meshed with the end face tooth spline, and then the wheel hub bearing and the outer ball cage of the drive shaft are fixed by fastening bolts. In the existing connection structure of the automobile wheel hub bearing and the outer ball cage of the drive shaft connected by the end face tooth, the mutual installation and positioning are usually only based on the meshing of the end face teeth between the two. This structural form is difficult to observe whether it is correctly meshed because the meshing part is easily blocked by the steering knuckle assembly during assembly, and the tooth height of the end face teeth is small. It is usually judged only by the workers' experience, which is prone to misjudgment. If the fastening screws are tightened without correct meshing, it is easy to cause abnormal noise and drive shaft falling off during the operation of the car. In addition, in the above structure, workers are required to press the drive shaft against the hub bearing with axial force during assembly. Otherwise, the outer ball cage of the drive shaft will fall off from the end face tooth structure of the hub bearing before the drive shaft bolts are tightened, making assembly more troublesome.

[0003] Therefore, it is urgent to improve the design of the existing connection structure between the automobile wheel hub bearing and the outer ball cage of the drive shaft using the end face tooth spline meshing connection, so as to facilitate the assembly of the automobile wheel hub bearing and the drive shaft, ensure that the wheel hub bearing and the outer ball cage of the drive shaft are meshed in place, and reduce the risk of abnormal noise and drive shaft falling off. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a connection structure between a vehicle wheel hub bearing and an outer ball cage of a drive shaft, which can facilitate the assembly of the vehicle wheel hub bearing and the drive shaft, and at the same time can help ensure that the wheel hub bearing and the outer ball cage of the drive shaft are engaged in place, thereby reducing the risk of abnormal noise and the drive shaft falling off.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a connection structure between an automobile wheel hub bearing and an outer ball cage of a drive shaft, comprising a fastener for fixing the wheel hub bearing and the outer ball cage of the drive shaft, wherein the wheel hub bearing and the outer ball cage of the drive shaft are meshed through end face teeth; the outer end surface of the outer ball cage of the drive shaft extends axially outward to form a raised portion which is internally sleeved in the wheel hub bearing, and an axial limiter is provided on the outer peripheral surface of the raised portion, wherein the axial limiter is used to limit the axial movement of the outer ball cage of the drive shaft after it is assembled in place.

[0006] Furthermore, the axial limiting member is a retaining spring, the protruding portion is provided with a retaining spring groove I for installing the retaining spring, and the inner hole of the hub bearing is provided with a retaining spring groove II for installing the retaining spring.

[0007] Furthermore, one end of the wheel hub bearing close to the outer ball cage of the driving shaft is provided with a conical expansion opening.

[0008] Furthermore, chamfered surfaces extending from the groove bottom to the inner hole wall of the hub bearing are respectively provided on both longitudinal sides of the retaining ring groove II.

[0009] Furthermore, the retaining spring is a C-type retaining spring for a shaft.

[0010] Furthermore, the fastener is a fastening bolt, which passes through the wheel hub bearing and is fixedly connected to the outer ball cage of the drive shaft.

[0011] Furthermore, the wheel hub bearing and the outer ball cage of the drive shaft are meshed through end face helical teeth.

[0012] Furthermore, the protrusion is a cylindrical protrusion.

[0013] Furthermore, the length of the protrusion is less than 1 / 2 of the width of the hub bearing.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] The connection structure between the automobile wheel hub bearing and the outer ball cage of the drive shaft provided by the utility model can be beneficial to the assembly of the automobile wheel hub bearing and the drive shaft, and is beneficial to ensuring that the wheel hub bearing and the outer ball cage of the drive shaft are in meshing position, thereby reducing the risk of abnormal noise and the drive shaft falling off. Specifically, by adding a protrusion on the outer ball cage of the drive shaft and designing an axial limiter on the protrusion, during the assembly process of the drive shaft, it can be judged whether the meshing is in place by pulling the drive shaft in the reverse direction, that is, when the drive shaft does not disengage, it means that the wheel hub bearing and the outer ball cage of the drive shaft are in meshing position, which can effectively reduce misjudgment and reduce the risk of abnormal noise and the drive shaft falling off. At the same time, during assembly, the axial movement of the outer ball cage of the drive shaft after being assembled in place is limited by the axial limiter, and there is no need for workers to apply additional axial clamping force, and subsequent fasteners, such as bolts, can be tightened, thereby simplifying the assembly process of the drive shaft.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Figure 2 is a schematic diagram of the cross-sectional structure of the utility model.

[0018] Figure 2 Schematic diagram of the cross-sectional structure of the wheel hub bearing

[0019] Figure 3 Schematic diagram of the cross-sectional structure of the outer ball cage of the drive shaft

[0020] Figure 4 This is a schematic diagram of the main structure of the utility model

[0021] Figure numerals: 1-wheel hub bearing; 101-circlip groove II; 102-conical expansion; 103-chamfered surface; 2-drive shaft outer ball cage; 201-protrusion; 201a-circlip groove I; 202-axial limiter; 3-fastener; 4-end face tooth. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

[0023] See also Figure 1-4A connection structure between a wheel hub bearing and an outer ball cage of a driving shaft, comprising a fastener 3 for fixing a wheel hub bearing 1 and an outer ball cage 2 of a driving shaft, wherein the wheel hub bearing 1 and the outer ball cage 2 of the driving shaft are meshed through end face teeth 4, and the fastener 3 can be a bolt or a nut, etc. Specifically, a bolt is used here, and the bolt is screwed into the outer side of the wheel hub bearing 1 to fix the wheel hub bearing 1 and the outer ball cage 2 of the driving shaft, and the end face teeth 4 are meshed, that is, the inner end face of the wheel hub bearing 1 and the outer end face of the outer ball cage 2 of the driving shaft are respectively provided with meshing spline teeth, which can be straight tooth meshing or helical tooth meshing. "Inside" and "outside" refer to the inside and outside relative to the lateral direction of the vehicle; the outer end surface of the drive shaft outer ball cage 2 extends outward along the axial direction to form a raised portion 201 that is sleeved inside the wheel hub bearing 1, and the "sleeve" here means the shaft hole fits, usually with a small gap fit, the raised portion 201 is preferably a cylindrical raised portion, and the raised portion 201 is preferably an integral structure with the drive shaft outer ball cage 2, and an axial limiter 202 is provided on the outer peripheral surface of the raised portion 201, and the axial limiter 202 is used to limit the axial movement of the drive shaft outer ball cage 2 after it is assembled in place, and the "assembly" here "In place" refers to the correct meshing of the end face teeth. The axial limiter 202 can be a variety of structures, such as a retaining spring, an elastic pin, etc., as long as it can limit the axial movement of the outer ball cage 2 of the drive shaft after it is assembled in place; in the above-mentioned structural design, by adding a protrusion 201 on the outer ball cage 2 of the drive shaft, and designing an axial limiter 201a on the protrusion 201, during the assembly process of the drive shaft, it can be judged whether the teeth are in place by pulling the drive shaft in the reverse direction. That is, when the drive shaft does not disengage, it means that the wheel hub bearing 1 and the outer ball cage 2 of the drive shaft are meshed in place, which can effectively reduce misjudgment. , reducing the risk of abnormal noise and drive shaft falling off; at the same time, during assembly, the axial movement of the outer ball cage of the drive shaft after being assembled in place is limited by the axial limit piece 201a, and there is no need for workers to apply additional axial clamping force, and subsequent fasteners, such as bolts, can be tightened, which simplifies the assembly process of the drive shaft; in addition, the wheel hub bearing 1 and the outer ball cage 2 of the drive shaft are meshed through the end face teeth 4. The meshing of the end face teeth 4 is conducive to reducing abnormal noise during the transmission process compared to the traditional circumferential spline tooth meshing transmission; at the same time, the raised portion 201 can play a certain installation guiding role.

[0024] In this embodiment, the axial limit member 202 is a retaining spring, the protrusion 201 is provided with a retaining spring groove I 201a for installing the retaining spring, and the inner hole of the hub bearing 1 is provided with a retaining spring groove II 101 for installing the retaining spring. The inner hole of the hub bearing 1 refers to the mounting hole for mounting with the protrusion 201. The retaining spring here can be a shaft retaining spring or a hole retaining ring. Specifically, it is a shaft retaining spring, that is, the retaining spring is pre-installed in the retaining spring groove I 201a, and its installation is an existing structure. The structure will not be elaborated here. It can be understood that the position of the retaining spring groove II 101 ensures that the retaining spring can be inserted into the retaining spring groove II 101 when the end face teeth are correctly engaged. When the assembly is incorrect, the retaining spring cannot be inserted into the retaining spring groove II 101. In this structural design, the retaining spring is used as the axial limit member 202, and the structure is simple. At the same time, during the assembly process, when the retaining spring is inserted into the retaining spring groove II 101, a sound can be heard. The sound can be used to assist in judging whether the end face teeth are correctly engaged, which is conducive to further improving the assembly efficiency.

[0025] In this embodiment, a conical expansion opening 102 is provided at one end of the wheel hub bearing 1 close to the outer ball cage 2 of the drive shaft; by designing the conical expansion opening 102 structure, it is convenient to install the retaining spring and to smoothly insert the retaining spring into the inner hole of the wheel hub bearing 1, which can play a certain guiding role for the retaining spring and facilitate assembly.

[0026] In this embodiment, chamfered surfaces 103 extending from the bottom of the groove to the inner hole wall of the wheel hub bearing 1 are respectively provided on both longitudinal sides of the retaining ring groove II 101. The longitudinal direction is the length direction of the drive shaft, that is, the lateral direction of the vehicle body. By designing the chamfered surface 103, it is helpful to reduce the pull-out force of the retaining ring from the retaining ring groove II when disassembling the outer ball cage 2 of the drive shaft.

[0027] In this embodiment, the retaining spring is a C-shaped retaining spring for the shaft, which has a simple structure and can help reduce the pressing force during assembly and the pulling force during disassembly.

[0028] In this embodiment, the fastener 3 is a fastening bolt, which passes through the wheel hub bearing 1 and is fixedly connected to the outer ball cage 2 of the drive shaft; the structure is simple and the disassembly and assembly are convenient.

[0029] In this embodiment, the wheel hub bearing 1 and the outer ball cage 2 of the drive shaft are meshed by end face helical teeth; the helical tooth meshing transmission is smoother and has a stronger load-bearing capacity, which is conducive to further reducing abnormal noise during operation.

[0030] In this embodiment, the protrusion 201 is a cylindrical protrusion, which has a simple structure and is easy to process.

[0031] In this embodiment, the length of the protrusion 201 is less than 1 / 2 of the width of the hub bearing 1, which is beneficial to reducing the overall length of the drive shaft, saving installation space, and facilitating assembly.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A connection structure between an automobile wheel hub bearing and an outer ball cage of a driving shaft, characterized in that: The invention comprises a fastener (3) for fixing a wheel hub bearing (1) and a drive shaft outer ball cage (2), wherein the wheel hub bearing (1) and the drive shaft outer ball cage (2) are meshed via end face teeth (4); the outer end face of the drive shaft outer ball cage (2) extends outward in the axial direction to form a raised portion (201) which is sleeved inside the wheel hub bearing (1); an axial stopper (202) is provided on the outer peripheral surface of the raised portion (201); the axial stopper (202) is used to limit the axial movement of the drive shaft outer ball cage (2) after it is assembled in place.

2. The connection structure between the automobile wheel hub bearing and the drive shaft outer cage according to claim 1, characterized in that: The axial limiting member (202) is a retaining spring, the protruding portion (201) is provided with a retaining spring groove I (201a) for installing the retaining spring, and the inner hole of the wheel hub bearing (1) is provided with a retaining spring groove II (101) for installing the retaining spring.

3. The connection structure between the automobile wheel hub bearing and the drive shaft outer cage according to claim 2, characterized in that: The wheel hub bearing (1) is provided with a conical expansion opening (102) at one end close to the outer ball cage (2) of the driving shaft.

4. The connection structure between the automobile wheel hub bearing and the drive shaft outer cage according to claim 3, characterized in that: The longitudinal sides of the retaining ring groove II (101) are respectively provided with chamfered surfaces (103) extending from the groove bottom to the inner hole wall surface of the hub bearing (1).

5. The connection structure between the automobile wheel hub bearing and the drive shaft outer cage according to claim 2, characterized in that: The retaining spring is a C-type retaining spring for shafts.

6. The connection structure between the automobile wheel hub bearing and the drive shaft outer cage according to claim 1, characterized in that: The fastener (3) is a fastening bolt, which passes through the wheel hub bearing (1) and is fixedly connected to the outer ball cage (2) of the drive shaft.

7. The connection structure between the automobile wheel hub bearing and the drive shaft outer cage according to claim 1, characterized in that: The wheel hub bearing (1) and the drive shaft outer ball cage (2) are meshed via end face helical teeth.

8. The connection structure between the automobile wheel hub bearing and the drive shaft outer cage according to claim 1, characterized in that: The protrusion (201) is a cylindrical protrusion.

9. The connection structure between the automobile wheel hub bearing and the drive shaft outer cage according to claim 8, characterized in that: The length of the protruding portion (201) is less than 1 / 2 of the width of the hub bearing (1).

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