Outer ball cage

Abstract

The utility model provides an outer ball cage, and belongs to the technical field of machinery. The problem of insufficient applicability is solved. An opening is formed in the front end of the shell, the starlike sleeve is arranged in the shell, a retainer is arranged between the inner wall of the shell and the outer wall of the starlike sleeve, a plurality of steel balls are arranged on the retainer in the circumferential direction, an inner spline is arranged in a center hole of the starlike sleeve, a first annular clamping groove is formed in the wall of the center hole of the starlike sleeve, and the first annular clamping groove is located at the position close to the rear end of the starlike sleeve. A second annular clamping groove is formed in the position, close to the front end of the starlike sleeve, of the center hole wall of the starlike sleeve, the depth of the second annular clamping groove is larger than that of the first annular clamping groove, and a receding notch is formed in the front end of the starlike sleeve and communicated with the second annular clamping groove. The method has the advantages of wide applicability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to an outer ball cage. Background Art

[0002] A universal joint is a component that realizes angular power transmission. It is used in positions where the direction of the transmission axis needs to be changed. It is a joint component of the universal transmission device of the automobile drive system. There are many types of universal joints, including the ball cage type constant velocity universal joint (also called the outer ball cage). The outer ball cage includes a shell and a star-shaped sleeve and a retaining frame both arranged in the shell. The retaining frame is located between the outer wall of the star-shaped sleeve and the inner wall of the shell. The retaining frame has a number of steel balls evenly arranged along the circumference. The inner wall of the shell is correspondingly provided with a number of inner raceways and the outer wall of the star-shaped sleeve is correspondingly provided with a number of outer raceways. Each steel ball is simultaneously located in the corresponding inner raceway and outer raceway, and swinging is achieved with the cooperation of the steel balls, the inner raceway and the outer raceway. The center hole of the star sleeve has an external spline for cooperating with the transmission shaft. Furthermore, an annular groove is respectively provided on the outer side of the transmission shaft and the inner side of the star sleeve. A retaining spring is simultaneously clamped in the two grooves to realize axial positioning of the transmission shaft and the star sleeve, just as disclosed in the constant velocity universal drive shaft with patent application number 201010271694.4.

[0003] In practice, when damage occurs, it needs to be repaired. The drive shaft used for repair may be the original drive shaft or the aftermarket drive shaft. As the name implies, the aftermarket drive shaft is not produced by the original manufacturer. The drive shaft of the original and aftermarket parts are slightly different in structure, such as dimensional accuracy and slot position. The existing outer ball cage can basically only adapt to one type, that is, it can adapt to the drive shaft of the original part or the drive shaft of the aftermarket part. It cannot be used in both, so there is a problem of insufficient applicability. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes an outer ball cage to solve the problem of insufficient applicability.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The outer ball cage comprises a shell with a front end opening and a star-shaped sleeve arranged in the shell, a retaining frame is arranged between the inner wall of the shell and the outer wall of the star-shaped sleeve, a plurality of steel balls are arranged on the retaining frame along the circumferential direction, the center hole of the star-shaped sleeve has an internal spline, and an annular groove 1 is arranged on the center hole wall of the star-shaped sleeve, characterized in that the annular groove 1 is located near the rear end of the star-shaped sleeve, an annular groove 2 is arranged on the center hole wall of the star-shaped sleeve near the front end of the star-shaped sleeve, the groove depth of the annular groove 2 is greater than the groove depth of the annular groove 1, and a clearance notch is arranged at the front end of the star-shaped sleeve, and the clearance notch is connected with the annular groove 2.

[0007] An annular groove is set in the star sleeve for cooperating with the transmission shaft of the accessory. It uses a C-type retaining spring. Specifically, during installation: install the C-type retaining spring at the rear end of the transmission shaft of the accessory, and then insert the rear end of the transmission shaft of the accessory into the inner hole of the star sleeve (the two form a spline fit). After reaching the position of the annular groove, the C-type retaining spring pops outward and is inserted into the annular groove. A second annular groove is set in the star sleeve for matching with the transmission shaft of the original part. It uses a shaft elastic retaining ring with two legs at the opening. Specifically, during installation: first assemble the shaft elastic retaining ring into the second annular groove, and the two legs of the shaft elastic retaining ring are located in the clearance gap. Then, the rear end of the transmission shaft of the original part is inserted into the inner hole of the star sleeve (the two form a spline fit). The shaft elastic retaining ring will be stretched open by the transmission shaft of the original part. After the transmission shaft of the original part moves to the corresponding groove on its outside and is relative to the shaft elastic retaining ring, the shaft elastic retaining ring will shrink inward and be stuck in the corresponding groove on the outside of the transmission shaft of the original part.

[0008] The outer ball cage is capable of being used interchangeably with the transmission shaft of the original part and the transmission shaft of the aftermarket part by providing an annular groove one and an annular groove two, thereby improving applicability; and the annular groove two is adapted to an elastic retaining ring for the shaft with two legs at the opening, while the annular groove one is adapted to a C-shaped retaining spring, which means that the installation details of the outer ball cage with the transmission shaft of the original part are different from the installation details of the transmission shaft of the aftermarket part, thereby avoiding installation errors that may occur due to universality.

[0009] In the above-mentioned outer ball cage, a plurality of outer raceways are evenly arranged on the side of the star-shaped sleeve along the circumferential direction, and the clearance gap is connected with one of the outer raceways along the radial direction of the star-shaped sleeve.

[0010] During processing, the milling cutter is directly used to feed from one of the outer raceways toward the center line of the star sleeve, and a gap communicating with the second annular groove can be directly milled out. Through such a setting, the existing space of the star sleeve is reasonably utilized, and the applicability is improved while the processing difficulty is reduced. Moreover, this will not affect the performance of the star sleeve.

[0011] In the above-mentioned outer ball cage, the groove width of the annular groove 1 is greater than the groove width of the annular groove 2.

[0012] The groove width of the annular groove one is greater than the groove width of the annular groove two, so that when the outer ball cage is installed with the transmission shaft of the auxiliary component, the C-shaped retaining ring will not be installed in the annular groove two.

[0013] In the above-mentioned outer ball cage, the front side groove wall of the annular groove 1 is inclined toward the front end of the star-shaped sleeve.

[0014] The annular groove 1 is used to cooperate with the transmission shaft of the auxiliary part, and it uses a C-type circlip. Unlike the wire retaining ring, the C-type circlip cannot be removed with circlip pliers, so the front side groove wall of the annular groove 1 is set to be inclined toward the front end of the star sleeve, so that when disassembling, the inclination of the front side groove wall of the annular groove 1 can be used to make the entire outer ball cage easily detached from the C-type circlip (the C-type circlip is always stuck on the transmission shaft of the auxiliary part).

[0015] In the above-mentioned outer ball cage, the outer ball cage also includes a dust cover, an annular groove is provided on the outer side of the front end of the shell, the rear end of the dust cover has an annular embedding part 1 that can be embedded in the annular groove, and the inner wall of the annular embedding part 1 is distributed with at least two sealing flanges 1, and the front end of the dust cover has an annular embedding part 2, and the inner wall of the annular embedding part 2 is distributed with at least two sealing flanges 2.

[0016] During assembly, the rear end of the dust cover is sleeved on the outside of the front end of the shell, and the annular embedded part 1 in the rear end of the dust cover is embedded in the annular embedded groove outside the front end of the shell, and then a clamp is used to hold the dust cover outside the rear end to fix the dust cover and the shell together. After the assembly connection is completed, each sealing flange 1 is compressed in the radial direction, so that the leakage prevention effect between the shell and the dust cover is better. Similarly, the annular embedded part 2 at the front end of the dust cover is embedded in the corresponding groove on the side of the transmission shaft and is also fixed with a clamp, and each sealing flange 2 is compressed in the radial direction, so that the leakage prevention effect between the dust cover and the transmission shaft can be improved.

[0017] Compared with the prior art, the outer ball cage of the present invention can be used for both the transmission shaft of the original part and the transmission shaft of the accessory part by providing the annular clamping groove 1 and the annular clamping groove 2, thereby improving the applicability. Moreover, the annular clamping groove 2 is adapted to the shaft elastic retaining ring with two legs at the opening, while the annular clamping groove 1 is adapted to the C-shaped retaining spring, which means that the installation details of the outer ball cage with the transmission shaft of the original part are different from the installation details of the transmission shaft of the accessory part, thereby avoiding the installation errors that may occur due to the commonality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the outer ball cage (without the dust cover connected).

[0019] Figure 2 It is a plan view of the front end of the star-shaped sleeve in the outer ball cage.

[0020] Figure 3 yes Figure 2 Sectional view along AA direction.

[0021] Figure 4 It is a plan view of a C-type retaining ring.

[0022] Figure 5 It is a plan view of a shaft circlip.

[0023] Figure 6 It is a cross-sectional view of the dust cover.

[0024] In the figure, 1, housing; 1a, handle; 1b, annular groove; 2, star sleeve; 2a, annular groove one; 2b, annular groove two; 2c, clearance gap; 2d, outer raceway; 3, retaining frame; 4, steel ball; 5, C-type retaining ring; 6, elastic retaining ring for shaft; 7, dust cover; 7a, annular embedded part one; 7a1, sealing flange one; 7b, annular embedded part two; 7b1, sealing flange two. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figure 1 As shown, the outer cage includes a shell 1 with an opening at the front end and a handle 1a at the rear end, and a star-shaped sleeve 2 arranged in the shell 1. A retainer 3 is arranged between the inner wall of the shell 1 and the outer wall of the star-shaped sleeve 2. The retainer 3 is provided with a plurality of steel balls 4 along the circumferential direction. The center hole of the star-shaped sleeve 2 has an internal spline. The handle 1a has an external spline section and an external thread section in sequence from front to back.

[0027] like Figure 1-Figure 5 As shown, the center hole wall of the star sleeve 2 is provided with an annular groove 1a, which is located near the rear end of the star sleeve 2. The outer ball cage also includes a C-shaped retaining spring 5 that can be inserted into the annular groove 1a. The front side groove wall of the annular groove 1a is inclined toward the front end of the star sleeve 2. The center hole wall of the star sleeve 2 is also provided with an annular groove 2b, which is located near the front end of the star sleeve 2. The groove depth of the annular groove 2b is greater than the groove depth of the annular groove 1a. The front end of the star sleeve 2 is provided with a clearance notch 2c, which is connected to the annular groove 2b. The outer ball cage also includes a shaft elastic retaining ring 6 with two feet at the opening. The maximum outer diameter of the annular groove 2b is greater than the outer diameter of the shaft elastic retaining ring 6, which provides a space for the shaft elastic retaining ring 6 to be stretched outward. The groove width of the annular groove 1a is greater than the groove width of the annular groove 2b. In this embodiment, a plurality of outer raceways 2d are evenly arranged on the side of the star-shaped sleeve 2 along the circumferential direction, and the clearance notch 2c is connected to one of the outer raceways 2d along the radial direction of the star-shaped sleeve 2. During processing, the clearance notch 2c connected to the annular groove 2b can be directly milled by directly using a milling cutter to feed from one of the outer raceways 2d toward the center line direction of the star-shaped sleeve 2. With such an arrangement, the existing space of the star-shaped sleeve 2 is reasonably utilized, and the performance of the star-shaped sleeve 2 will not be affected.

[0028] An annular groove 2a is provided in the star-shaped sleeve 2 for cooperating with the transmission shaft of the accessory. Specifically, during installation: the C-shaped retaining spring 5 is installed at the rear end of the transmission shaft of the accessory, and then the rear end of the transmission shaft of the accessory is inserted into the inner hole of the star-shaped sleeve 2 (the two form a spline fit). After reaching the position of the annular groove 2a, the C-shaped retaining spring 5 pops outward and is inserted into the annular groove 2a. An annular groove 2b is set in the star sleeve 2 for matching with the transmission shaft of the original part. Specifically, during installation: first assemble the shaft elastic retaining ring 6 into the annular groove 2b, and the two feet of the shaft elastic retaining ring 6 are located in the clearance gap 2c, and then insert the rear end of the original transmission shaft into the inner hole of the star sleeve 2 (the two form a spline fit), and the shaft elastic retaining ring 6 will be stretched open by the original transmission shaft. After the original transmission shaft moves to the corresponding groove on its outer side and is relative to the shaft elastic retaining ring 6, the shaft elastic retaining ring 6 will shrink inward and be stuck in the corresponding groove on the outer side of the original transmission shaft. By providing the annular groove 1 2a and the annular groove 2b, the transmission shaft of the original part and the transmission shaft of the aftermarket part can be used interchangeably, thereby improving applicability; and the annular groove 2b is adapted to the elastic retaining ring 6 for the shaft with two legs at the opening, while the annular groove 1 2a is adapted to the C-shaped retaining spring 5, which means that the installation details of the outer ball cage with the transmission shaft of the original part are different from the installation details of the transmission shaft with the aftermarket part, thereby avoiding installation errors that may occur due to universality.

[0029] Furthermore, if Figure 1 and Figure 6 As shown, the outer ball cage also includes a dust cover 7, an annular embedding groove 1b is provided on the outer side of the front end of the housing 1, and the rear end of the dust cover 7 has an annular embedding portion 17a that can be embedded in the annular embedding groove 1b, and the inner wall of the annular embedding portion 17a is distributed with at least two sealing flanges 17a1, and the front end of the dust cover 7 has an annular embedding portion 27b, and the inner wall of the annular embedding portion 27b is distributed with at least two sealing flanges 27b1. During assembly, the rear end of the dust cover 7 is sleeved on the outer side of the front end of the housing 1, and the annular embedding portion 17a in the rear end of the dust cover 7 is embedded in the annular embedding groove 1b on the outer side of the front end of the housing 1, and then the dust cover 7 is fixed to the housing 1 by a clamp around the dust cover rear end. The sealing flange 17a1 contacts the bottom wall of the annular embedding groove 1b, and after the clamp is tightened to complete the assembly connection between the dust cover 7 and the housing 1, each sealing flange 17a1 will be compressed in the radial direction, so that the leakage prevention effect between the housing 1 and the dust cover 7 is better. Similarly, the annular embedded portion 7b at the front end of the dust cover 7 is embedded in the corresponding groove on the side of the transmission shaft and fixed with a clamp. Each sealing flange 7b1 is compressed in the radial direction, so that the leakage prevention effect between the dust cover 7 and the transmission shaft can be improved.

[0030] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An outer ball cage, comprising a shell (1) with an opening at the front end and a star-shaped sleeve (2) arranged in the shell (1), a retainer (3) is arranged between the inner wall of the shell (1) and the outer wall of the star-shaped sleeve (2), and the retainer (3) is provided with a plurality of steel balls (4) along the circumferential direction, the center hole of the star-shaped sleeve (2) has an internal spline, and an annular groove (2a) is arranged on the center hole wall of the star-shaped sleeve (2), characterized in that: The annular groove 1 (2a) is located near the rear end of the star sleeve (2); an annular groove 2 (2b) is provided at the central hole wall of the star sleeve (2) near the front end of the star sleeve (2); the groove depth of the annular groove 2 (2b) is greater than the groove depth of the annular groove 1 (2a); a clearance notch (2c) is provided at the front end of the star sleeve (2); and the clearance notch (2c) is connected to the annular groove 2 (2b).

2. The outer cage according to claim 1, characterized in that: A plurality of outer raceways (2d) are evenly arranged on the side of the star-shaped sleeve (2) along the circumferential direction, and the clearance notch (2c) is connected to one of the outer raceways (2d) along the radial direction of the star-shaped sleeve (2).

3. The outer cage according to claim 2, characterized in that: The groove width of the annular groove 1 (2a) is greater than the groove width of the annular groove 2 (2b).

4. The outer cage according to claim 3, characterized in that: The front side groove wall of the annular groove 1 (2a) is arranged to be inclined toward the front end of the star-shaped sleeve (2).

5. The outer cage according to claim 1, 2, 3 or 4, characterized in that: The outer ball cage also includes a dust cover (7), an annular embedding groove (1b) is provided on the outer side of the front end of the shell (1), the rear end of the dust cover (7) has an annular embedding portion (7a) that can be embedded in the annular embedding groove (1b), the inner wall of the annular embedding portion (7a) is provided with at least two sealing flanges (7a1), the front end of the dust cover (7) has an annular embedding portion (7b), the inner wall of the annular embedding portion (7b) is provided with at least two sealing flanges (7b1).

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