Rzeppa universal joint composite seal

Abstract

The utility model belongs to the technical field of universal joint sealing covers, and particularly relates to a spherical cage universal joint composite seal which comprises a spherical cage universal joint, the spherical cage universal joint comprises a hollow bell-shaped shell with one open face, an annular fixing ring is arranged on the outer side wall of the bell-shaped shell, a first sealing groove is formed in the outer side wall of the fixing ring in an inwards-concave mode, and a second sealing groove is formed in the outer side wall of the fixing ring. And an annular retainer is arranged in a gap of an inner cavity of the bell-shaped shell. According to the utility model, the first assembly ring is sleeved on the fixing ring, the first sealing groove is tightly attached to the first sealing strip in a multi-surface manner, then the second assembly ring is sleeved on the sealing bearing, and the second sealing groove is tightly attached to the second sealing strip in a multi-surface manner, so that the sealing performance is improved; and then the first hoop and the second hoop are respectively embedded and fixedly mounted in the first limiting groove and the second limiting groove, so that the first hoop and the second hoop cannot move left and right, the possibility that the first hoop and the second hoop are separated from the first assembly ring and the second assembly ring is reduced, the mounting is firmer, the sealing cover is more stable when being mounted on the rzeppa universal joint, the separation is reduced, and the sealing is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joint seals, and specifically relates to a constant velocity joint composite seal. Background Technique

[0002] The constant velocity joint is an important component of the transmission system and is widely used in many industries such as automobiles, construction machinery, metallurgy, non-ferrous metals, petroleum machinery, textile machinery, and special vehicles. Its main function is to convert the rotational motion of the transmission shaft into the linear motion of the tire and adapt to the steering requirements of the vehicle under different road conditions. The universal joint needs to be lubricated during operation. In order to prevent the leakage of lubricating oil, a sealing structure is required to seal it.

[0003] The traditional seal cover is usually sleeved on one side of the housing of the universal joint and on the bearing of the transmission shaft on the other side, and then locked by a clamp. After long-term operation, especially when installed on devices such as vehicles that are prone to vibration, once the clamp loosens and is misaligned with the seal cover, a gap appears between the housing of the universal joint and the seal cover, which easily causes the leakage of lubricating oil and affects the use of the universal joint. Therefore, it is necessary to develop a constant velocity joint composite seal. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] To solve the above technical problems, according to one aspect of the utility model, the following technical solutions are provided:

[0006] A constant velocity joint composite seal, which includes:

[0007] A constant velocity joint, the constant velocity joint includes a hollow bell-shaped housing with one side open. An annular fixing ring is provided on the outer side wall of the bell-shaped housing. A first sealing groove is concavely opened on the outer side wall of the fixing ring. An annular cage is provided in the inner cavity of the bell-shaped housing with a clearance. A spherical constant velocity joint head is provided on the inner side of the cage. Part of the constant velocity joint head is located outside the bell-shaped housing. A transmission shaft is provided on the side of the constant velocity joint head located outside the bell-shaped housing. A sealing bearing is rotatably provided on the outer side of the rod body of the transmission shaft. A second sealing groove is concavely opened on the outer side wall of the sealing bearing;

[0008] A sealing cover is sleeved on the fixing ring and the sealing bearing together. The sealing cover includes a cover body in the middle, a first assembly ring at the left end of the cover body, and a second assembly ring at the right end of the cover body. The sealing cover is in the shape of a hollow frustum of a cone. A first sealing strip protrudes from the inner side of the first assembly ring, and the first sealing strip is in interference fit with the first sealing groove. A first limiting groove for the first clamp to be embedded and installed is concavely formed on the outer side of the first assembly ring, and the width of the groove in the first limiting groove is equal to the width of the first clamp. A second sealing strip protrudes from the inner side of the second assembly ring, and the second sealing strip is in interference fit with the second sealing groove. A second limiting groove for the second clamp to be embedded and installed is concavely formed on the outer side of the second assembly ring, and the width of the groove in the second limiting groove is equal to the width of the second clamp.

[0009] As a preferred solution of a ball cage universal joint composite seal according to the present invention, wherein: an outer raceway is concavely formed on the inner side wall of the bell housing at equal intervals around the center of the ball of the ball cage head, and an inner raceway is concavely formed on the outer side wall of the cage at equal intervals around the center of the ball of the ball cage head. The outer raceway and the inner raceway are in one-to-one correspondence, and steel balls are arranged between the outer raceway and the inner raceway.

[0010] As a preferred solution of a ball cage universal joint composite seal according to the present invention, wherein: a connecting shaft is provided at one end of the bell housing away from the ball cage head, and a spline shaft is provided at one end of the transmission shaft away from the ball cage head.

[0011] As a preferred solution of a ball cage universal joint composite seal according to the present invention, wherein: the cross section of the fixing ring and the first sealing groove as a whole is in the shape of a "concave", and the cross section of the first assembly ring and the first sealing strip as a whole is in the shape of an inverted "convex".

[0012] As a preferred solution of a ball cage universal joint composite seal according to the present invention, wherein: the cross section of the sealing bearing and the second sealing groove as a whole is in the shape of a "concave", and the cross section of the second assembly ring and the second sealing strip as a whole is in the shape of an inverted "convex".

[0013] As a preferred solution of a ball cage universal joint composite seal according to the present invention, wherein: the sealing cover is integrally formed, and the cross section of the inner and outer sides of the cover body is in a corrugated shape with concave and convex intersections.

[0014] As a preferred solution of a ball cage universal joint composite seal according to the present invention, wherein: reinforcing ribs are arranged around the inside of the cover body of the cover body, and the reinforcing ribs are in a conical spiral shape.

[0015] As a preferred embodiment of the composite seal of the constant velocity joint of the present utility model, the following is provided: the sealing cover is composed of two symmetrical hollow frustum-shaped bodies, the inner and outer sides of the cross-section of the cover body are in a corrugated shape with concave and convex intersections, the two hollow frustum-shaped bodies are snap-fitted, and a groove for injecting glue is formed by concave inward at the connection.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: First, the first assembly ring is sleeved on the fixed ring, and the concave first sealing groove is in close contact with the protruding first sealing strip on multiple surfaces. Then, the second assembly ring is sleeved on the sealed bearing, and the concave second sealing groove is in close contact with the protruding second sealing strip on multiple surfaces, thereby making the connection more tight and improving the sealing performance. Then, the first and second clamps are respectively embedded and fastened in the first and second limiting grooves. Since the widths of the first and second clamps are the same as the widths inside the first and second limiting grooves, the first and second clamps cannot move left and right, reducing the possibility of separating from the first and second assembly rings, making the installation more firm, further making the sealing cover more stable when installed on the constant velocity joint, reducing detachment, and being beneficial for sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0018] Figure 1 is a structural schematic diagram of the present utility model;

[0019] Figure 2 of the present utility model Figure 1 is a structural schematic diagram in the side view direction;

[0020] Figure 3 is a structural schematic diagram of the cross-section of the sealing cover of the present utility model;

[0021] Figure 4 is an exploded view of the sealing cover of the present utility model;

[0022] Figure 5 is a structural schematic diagram after the sealing cover of the present utility model is installed.

[0023] In the figure: Cardan joint 100, bell housing 110, fixing ring 120, first sealing groove 121, cardan head 130, transmission shaft 140, spline shaft 141, sealed bearing 150, cage 160, outer raceway 170, steel ball 180, connecting shaft 190, sealing cover 200, first assembly ring 210, first sealing strip 211, first limiting groove 212, cover body 220, reinforcing rib 221, second assembly ring 230, second sealing strip 231, second limiting groove 232. Detailed implementation mode

[0024] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation mode of the present utility model will be given in conjunction with the attached drawings.

[0025] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar promotions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementation modes disclosed below.

[0026] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the protection scope of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0027] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following will further describe the embodiments of the present utility model in detail in conjunction with the attached drawings.

[0028] Please refer to Figures 1-5 , which shows a structural schematic diagram of an embodiment of the composite seal of a cardan joint of the present utility model. Please refer to Figures 1-5 , and a detailed introduction to a composite seal of a cardan joint will be given.

[0029] A composite seal for a constant velocity joint, comprising a constant velocity joint 100. The constant velocity joint 100 includes a hollow bell housing 110 with one open side. An annular fixing ring 120 is provided on the outer side wall of the bell housing 110. A first sealing groove 121 is recessed in the outer side wall of the fixing ring 120. An annular cage 160 is disposed in the inner cavity of the bell housing 110 with a clearance. A spherical constant velocity joint head 130 is provided inside the cage 160. A part of the constant velocity joint head 130 is located outside the bell housing 110, and a transmission shaft 140 is provided on the side surface of the constant velocity joint head 130 located outside the bell housing 110. A sealing bearing 150 is rotatably provided on the outer side of the rod body of the transmission shaft 140. A second sealing groove 151 is recessed in the outer side wall of the sealing bearing 150;

[0030] A sealing cover 200 is sleeved on the fixing ring 120 and the sealing bearing 150 together. The sealing cover 200 includes a middle cover body 220, a first assembly ring 210 at the left end of the cover body 220, and a second assembly ring 230 at the right end of the cover body 220. The sealing cover 200 is in the shape of a hollow truncated cone pagoda as a whole. A circle of first sealing strips 211 protrude from the inner side of the first assembly ring 210. The first sealing strips 211 are in interference fit with the first sealing groove 121. A first limiting groove 212 for the inner embedded installation of the first clamp is recessed in the outer side of the first assembly ring 210. The width of the groove in the first limiting groove 212 is equal to the width of the first clamp, so that after the first clamp is embedded and installed in the first limiting groove 212, it cannot move left and right, reducing the possibility of disengaging from the first assembly ring 210. A circle of second sealing strips 231 protrude from the inner side of the second assembly ring 230. The second sealing strips 231 are in interference fit with the second sealing groove 151. A second limiting groove 232 for the inner embedded installation of the second clamp is recessed in the outer side of the second assembly ring 230. The width of the groove in the second limiting groove 232 is equal to the width of the second clamp, so that after the second clamp is embedded and installed in the second limiting groove 232, it cannot move left and right, reducing the possibility of disengaging from the second assembly ring 230.

[0031] Further, the inner side wall of the bell housing 110 is recessed with outer raceways 170 at equal intervals around the center of the ball center of the constant velocity joint head 130. The outer side wall of the cage 160 is recessed with inner raceways at equal intervals around the center of the ball center of the constant velocity joint head 130. The positions of the outer raceways 170 and the inner raceways correspond one by one, and steel balls 180 are provided between the outer raceways 170 and the inner raceways. The outer raceways 170, the inner raceways and the steel balls 180 are common components of the existing constant velocity joint 100 and will not be elaborated here.

[0032] Further, a connecting shaft 190 is provided at one end of the bell housing 110 away from the constant velocity joint head 130, and a spline shaft 141 is provided at one end of the transmission shaft 140 away from the constant velocity joint head 130. The external components can be conveniently connected through the connecting shaft 190 and the spline shaft 141.

[0033] Further, the overall cross-section of the fixing ring 120 and the first sealing groove 121 is in a "concave" shape, and the overall cross-section of the first assembling ring 210 and the first sealing strip 211 is in an inverted "convex" shape. When the first assembling ring 210 is sleeved on the fixing ring 120, the concave first sealing groove 121 and the protruding first sealing strip 211 are in multi-faceted contact, so that the connection part is more tight and the sealing performance is improved.

[0034] Further, the overall cross-section of the sealed bearing 150 and the second sealing groove 151 is in a "concave" shape, and the overall cross-section of the second assembling ring 230 and the second sealing strip 231 is in an inverted "convex" shape. When the second assembling ring 230 is sleeved on the sealed bearing 150, the concave second sealing groove 151 and the protruding second sealing strip 231 are in multi-faceted contact, so that the connection part is more tight and the sealing performance is improved.

[0035] Further, the sealing cover 200 is integrally formed. The cross-section of the cover body 220 is in a corrugated shape with concave and convex alternations on the inner and outer sides. Reinforcing ribs 221 are arranged around the inside of the cover body 220 of the cover body 220, and the reinforcing ribs 221 are in a conical spiral shape. The overall strength of the cover body 220 is strengthened through the arranged reinforcing ribs 221, thereby extending its service life. This sealing cover 200 is integrally formed. When replacing the sealing cover 200, the components connected to the spline shaft 141 need to be disassembled before the sealing cover 200 can be replaced. Although the replacement is inconvenient, due to the integral formation of the sealing cover 200, the overall sealing strength is better.

[0036] Further, the sealing cover 200 is composed of two symmetrical hollow frustum-shaped bodies. The cross-section of the cover body 220 is in a corrugated shape with concave and convex alternations on the inner and outer sides. The two hollow frustum-shaped bodies are snap-connected, and a groove for injecting glue is formed in the concave connection part. The traditional sealing cover 200 is mostly composed of two symmetrical hollow frustum-shaped bodies combined. When replacing, it is not necessary to disassemble the components connected to the spline shaft 141, and the sealing cover 200 can also be replaced.

[0037] In the specific use process, first, the first assembly ring 210 is sleeved on the fixed ring 120, and the concave first sealing groove 121 is in multi-faceted close contact with the protruding first sealing strip 211. Then, the second assembly ring 230 is sleeved on the sealing bearing 150, and the concave second sealing groove 151 is in multi-faceted close contact with the protruding second sealing strip 231, so that the connection part is more tight and the sealing performance is improved. Then, the first and second clamps are respectively embedded and fastened in the first and second limiting grooves. Since the widths of the first and second clamps are the same as the widths inside the first and second limiting grooves, the first and second clamps cannot move left and right, reducing the possibility of separating from the first and second assembly rings, making the installation more firm, further making the seal cover 200 more stable when installed on the constant velocity joint 100, reducing detachment and being beneficial to sealing.

[0038] Although the present utility model has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present utility model can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the consideration of saving space and resources. Therefore, the present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A constant velocity joint composite seal, characterized in that, Comprising: A constant velocity joint (100), the constant velocity joint (100) includes a hollow bell housing (110) with an open side, an annular fixing ring (120) is provided on the outer side wall of the bell housing (110), a first sealing groove (121) is concavely formed on the outer side wall of the fixing ring (120), an annular cage (160) is arranged in the inner cavity of the bell housing (110) with a gap, a spherical cage head (130) is arranged inside the cage (160), a part of the cage head (130) is located outside the bell housing (110), and a transmission shaft (140) is arranged on the side of the cage head (130) located outside the bell housing (110), a sealing bearing (150) is rotatably arranged on the outer side of the rod body of the transmission shaft (140), and a second sealing groove (151) is concavely formed on the outer side wall of the sealing bearing (150); A sealing cover (200), the fixing ring (120) and the sealing bearing (150) are jointly sleeved with a sealing cover (200), the sealing cover (200) includes a middle cover body (220), a first assembly ring (210) located at the left end of the cover body (220), and a second assembly ring (230) located at the right end of the cover body (220), the sealing cover (200) is in an overall shape of a hollow truncated cone pagoda, a first sealing strip (211) protrudes from the inner side of the first assembly ring (210), the first sealing strip (211) is in interference fit with the first sealing groove (121), a first limiting groove (212) for the first clamp to be embedded and installed is concavely formed on the outer side of the first assembly ring (210), the width of the groove inside the first limiting groove (212) is equal to the width of the first clamp, a second sealing strip (231) protrudes from the inner side of the second assembly ring (230), the second sealing strip (231) is in interference fit with the second sealing groove (151), and a second limiting groove (232) for the second clamp to be embedded and installed is concavely formed on the outer side of the second assembly ring (230), the width of the groove inside the second limiting groove (232) is equal to the width of the second clamp.

2. The composite seal for a constant velocity joint according to claim 1, wherein: The inner side wall of the bell housing (110) is concavely formed with outer raceways (170) at equal intervals around the center of the ball center of the cage head (130), the outer side wall of the cage (160) is concavely formed with inner raceways at equal intervals around the center of the ball center of the cage head (130), the outer raceways (170) and the inner raceways are in one-to-one correspondence, and steel balls (180) are arranged between the outer raceways (170) and the inner raceways.

3. The composite seal of a constant velocity joint according to claim 1, characterized in that: A connecting shaft (190) is arranged at one end of the bell housing (110) away from the cage head (130), and a spline shaft (141) is arranged at one end of the transmission shaft (140) away from the cage head (130).

4. A constant velocity joint composite seal according to claim 1, characterized in that: The overall cross-section of the fixing ring (120) and the first sealing groove (121) is in a "concave" shape, and the overall cross-section of the first assembly ring (210) and the first sealing strip (211) is in an inverted "convex" shape.

5. The composite seal of a constant velocity joint according to claim 1, characterized in that: The cross-section of the whole of the sealed bearing (150) and the second sealing groove (151) is in a "concave" shape, and the cross-section of the whole of the second assembly ring (230) and the second sealing strip (231) is in an inverted "convex" shape.

6. The composite seal for a constant velocity joint according to claim 1, wherein: The sealing cover (200) is integrally formed, and the inner and outer sides of the cross-section of the cover body (220) are in a corrugated shape with alternating concave and convex.

7. The composite seal of a constant velocity joint according to claim 6, characterized in that: Reinforcing ribs (221) are arranged around the inside of the cover body (220), and the reinforcing ribs (221) are in a conical spiral shape.

8. A constant velocity joint composite seal according to claim 1, characterized in that: The sealing cover (200) is composed of two symmetrical hollow frustum-shaped bodies. The inner and outer sides of the cross-section of the cover body (220) are in a corrugated shape with alternating concave and convex. The two hollow frustum-shaped bodies are snap-connected, and a groove for injecting glue is formed by being concave at the connection part.

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