Pre-tightening elastic push type ball cage zero-clearance large-swing-angle transmission shaft assembly

Abstract

The utility model discloses a pre-tightening elastic pushing type ball cage zero-clearance large-swing-angle transmission shaft assembly. The problem that a gap between an existing ball cage and a star-shaped sleeve is difficult to eliminate is mainly solved. The device is characterized in that a spherical surface (210) is arranged on the inner wall of the shell; the accommodating groove (11) is formed in the axial outer wall of the middle shaft extending into the shell; part of the rolling piece (13) is arranged in the accommodating groove, and part of the rolling piece (13) is in contact with the spherical surface; and the elastic piece (12) is arranged in the accommodating groove and is used for providing pre-tightening force for the contact of the rolling ball and the spherical surface. According to the pre-tightening elastic pushing type ball cage zero-clearance large-swing-angle transmission shaft assembly, in the working process of a transmission shaft, pre-tightening force generated by a spring pushes a steel ball, then the ball cage is pushed to be tightly matched with a star-shaped sleeve (through a rolling ball), the clearance between the ball cage and the star-shaped sleeve is effectively eliminated, and the accuracy and stability of power transmission are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts, concretely relates to a pre-tightening elastic pushing type ball cage zero-gap large swing angle transmission shaft assembly. BACKGROUND

[0002] In the automobile transmission system, the ball cage type universal joint transmission shaft is one of the key components, which mainly functions to stably transmit the power of the engine to the wheels at different angles and distances. However, in the long-term use of the traditional ball cage type universal joint transmission shaft, a gap is easily generated between the ball cage and the star-shaped sleeve. The existence of this gap will lead to inaccurate transmission, power loss and vibration, etc., thereby affecting the driving stability and reliability of the vehicle and reducing the overall performance of the vehicle. In addition, the noise generated by the gap will also affect the driving experience. Therefore, it is necessary to improve the structure of the existing ball cage type universal joint transmission shaft to eliminate the gap between the ball cage and the star-shaped sleeve and improve the transmission performance. SUMMARY

[0003] In order to overcome the deficiencies in the background art, the utility model provides a pre-tightening elastic pushing type ball cage zero-gap large swing angle transmission shaft assembly, which mainly solves the problem that the gap between the current ball cage and the star-shaped sleeve is difficult to eliminate.

[0004] The technical scheme of the utility model is,

[0005] A pre-tightening elastic pushing type ball cage zero-gap large swing angle transmission shaft assembly, comprising an intermediate shaft, a first universal joint is arranged at one end of the intermediate shaft, and a second universal joint is arranged at the other end of the intermediate shaft, the first universal joint comprises a shell, part of the intermediate shaft is inserted into the shell, a spherical surface is arranged on the inner wall of the shell,

[0006] A containing groove is arranged on the axial outer wall of the intermediate shaft inserted into the shell,

[0007] A rolling element is partially arranged in the containing groove and partially in contact with the spherical surface,

[0008] An elastic element is arranged in the containing groove and is used to provide a pre-tightening force for the contact between the rolling ball and the spherical surface.

[0009] The elastic element is a spring.

[0010] Further comprising a baffle, which is axially movably mounted in the containing groove, one end of the baffle is in contact with the elastic element, and the other end of the baffle is in contact with the rolling element.

[0011] The rolling element is a steel ball.

[0012] The intermediate shaft comprises a first shaft and a second shaft, a sliding groove is arranged in the first shaft, part of the second shaft is arranged in the sliding groove, and part of the second shaft is inserted into the shell.

[0013] Further comprising a retainer arranged in the chute, a rolling ball is mounted on the retainer, the rolling ball is in rolling fit with the inner wall of the chute, and the rolling ball is in rolling fit with the circumferential outer wall of the second shaft.

[0014] Further comprising a dust cover, one end of the dust cover is connected with the circumferential outer wall of the shell, and the other end is connected with the first shaft.

[0015] The first shaft and the second shaft are coaxially arranged.

[0016] The circumferential outer wall of the second shaft is provided with a snap ring and a spring, one end of the spring is in contact with the snap ring, and the other end is in contact with the retainer.

[0017] The beneficial effects of the present application are as follows: the pre-tightening elastic pushing type ball cage zero-gap large swing angle transmission shaft assembly is provided, in the working process of the transmission shaft, the pre-tightening force generated by the spring pushes the steel ball, and then pushes the ball cage and the star-shaped sleeve to be closely matched (through the rolling ball), the gap between the ball cage and the star-shaped sleeve is effectively eliminated, and the accuracy and stability of power transmission are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a sectional view of an embodiment of the present application.

[0019] Figure 2 It is a sectional view of an embodiment of the present application. DETAILED DESCRIPTION

[0020] The present application will be further described below with reference to the drawings. A pre-tightening elastic pushing type ball cage zero-gap large swing angle transmission shaft assembly comprises an intermediate shaft 1, one end of the intermediate shaft is provided with a first universal joint 2, the other end is provided with a second universal joint 3, the first universal joint comprises a shell 21, part of the intermediate shaft extends into the shell, a spherical surface 210 is arranged on the inner wall of the shell, a containing groove 11 is arranged on the axial outer wall of the intermediate shaft extending into the shell, a rolling member 13 is partially arranged in the containing groove and partially in contact with the spherical surface, and an elastic member 12 is arranged in the containing groove and is used to provide a pre-tightening force for the contact between the rolling ball and the spherical surface. There is a gap between the conventional rolling ball and the star-shaped sleeve, and between the rolling ball and the inner wall of the shell. In the present application, the end of the intermediate shaft obtains a reaction force through the elastically supported rolling ball, the star-shaped sleeve 9 is "moved outward" to eliminate the gap, and the channel of the star-shaped sleeve is raised from the outside to the inside. Moving the star-shaped sleeve outward is equivalent to lifting the rolling ball to eliminate the gap. The star-shaped sleeve is mounted on the outer wall of the intermediate shaft extending into the shell, and its specific working process is prior art and will not be described here.

[0021] In the present embodiment, as shown in the drawings, the elastic member is a spring. The cost is lower.

[0022] In the embodiment, as shown in the figure, a baffle 14 is further included, which is axially movable and mounted in the accommodating groove, one end of the baffle is in contact with the elastic member, and the other end is in contact with the rolling member. The overall movement is more stable.

[0023] In the embodiment, as shown in the figure, the rolling member is a steel ball.

[0024] In the embodiment, as shown in the figure, the intermediate shaft includes a first shaft 15 and a second shaft 16, the first shaft is provided with a sliding groove 151, part of the second shaft is arranged in the sliding groove, and part of the second shaft extends into the shell. The axial extension amount can be increased.

[0025] In the embodiment, as shown in the figure, a retainer 17 is further included, which is arranged in the sliding groove, and a rolling ball 171 is mounted on the retainer, the rolling ball is in rolling cooperation with the inner wall of the sliding groove, and the rolling ball is in rolling cooperation with the circumferential outer wall of the second shaft. The overall movement is more stable.

[0026] In the embodiment, as shown in the figure, a dust cover is further included, one end of the dust cover is connected with the circumferential outer wall of the shell, and the other end is connected with the first shaft.

[0027] In the embodiment, as shown in the figure, the first shaft and the second shaft are coaxially arranged. The operation is stable.

[0028] In the embodiment, as shown in the figure, the circumferential outer wall of the second shaft is provided with a snap ring 161 and a spring 162, one end of the spring is in contact with the snap ring, and the other end is in contact with the retainer.

[0029] In the description of the utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0030] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0031] The embodiments described with reference to the drawings are exemplary and are intended to serve for the explanation of the present application and cannot be understood as a limitation of the present application. The embodiments should not be regarded as a limitation of the present application, but any improvement made on the basis of the spirit of the present application should be within the scope of protection of the present application.

Claims

1. A pre-tightening ball-cage zero-backlash large swing angle transmission shaft assembly, comprising a middle shaft (1), a first universal joint (2) at one end of the middle shaft, and a second universal joint (3) at the other end of the middle shaft, the first universal joint comprising a housing (21), part of the middle shaft extending into the housing, characterized in that: a spherical surface (210) is provided on the inner wall of the housing; a containing groove (11) is provided on the axial outer wall of the middle shaft extending into the housing; a rolling element (13) is partially provided in the containing groove and partially in contact with the spherical surface; an elastic element (12) is provided in the containing groove and used to provide a pre-tightening force for the contact between the rolling ball and the spherical surface; the elastic element is a spring; a baffle (14) is further provided, which is axially movably mounted in the containing groove, one end of the baffle being in contact with the elastic element and the other end being in contact with the rolling element; the rolling element is a steel ball; the middle shaft comprises a first shaft (15) and a second shaft (16), the first shaft being provided with a sliding groove (151) inside, part of the second shaft being provided in the sliding groove and part of the second shaft extending into the housing; a retainer (17) is further provided, which is provided in the sliding groove, the retainer being provided with a rolling ball (171) mounted thereon, the rolling ball being in rolling engagement with the inner wall of the sliding groove and the circumferential outer wall of the second shaft; a dust cover is further provided, one end of the dust cover being connected with the circumferential outer wall of the housing and the other end being connected with the first shaft; the first shaft and the second shaft are coaxially arranged; the circumferential outer wall of the second shaft is provided with a snap ring (161) and a spring (162), one end of the spring being in contact with the snap ring and the other end being in contact with the retainer. ​ ​ ​ ​ 2. A preloaded ball push type zero-backlash large angle transmission shaft assembly according to claim 1, characterized in that: ​ 3. A pretensioning push ball-cage zero-backlash large-angle transmission shaft assembly according to claim 2, characterized in that: ​ 4. A pretensioning push ball-cage zero-backlash large-angle transmission shaft assembly according to claim 3, characterized in that: ​ 5. A pretensioning push-bush type zero-backlash large-angle transmission shaft assembly according to claim 4, characterized in that: ​ 6. A pretensioning push-bush type zero-backlash large-angle transmission shaft assembly according to claim 5, characterized in that: ​ 7. A pretensioning push-bush type zero-backlash large-angle transmission shaft assembly according to claim 6, characterized in that: ​ 8. A pretensioning push-bush type zero-backlash large-angle transmission shaft assembly according to claim 7, characterized in that: ​ 9. A pretensioning push-bush type zero-backlash large-angle transmission shaft assembly according to claim 8, characterized in that: ​

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