Low-resistance universal driving shaft lever

Abstract

The utility model discloses a low-resistance universal driving shaft lever which comprises a shaft lever body, a plurality of large-pressure-angle splines parallel to the shaft lever body are arranged on the surface of the shaft lever body at equal intervals in the circumferential direction, the large-pressure-angle splines comprise long splines and short splines, and the long splines and the short splines are arranged at intervals. The short spline is arranged at the position, away from the bell jar, of the surface of the shaft rod body, and balls are movably embedded in the top, the front face and the back face of the short spline through grooves. The large-pressure-angle spline and the balls are arranged, the friction force between the large-pressure-angle spline and the inner spline groove of the surface spline sleeve is reduced by increasing the pressure angle and replacing sliding friction with rolling friction, and abrasion is reduced; the long splines and the short splines are arranged at intervals, so that the transmission requirement can be met, material use can be reduced, the weight can be reduced, and meanwhile resistance and abrasion are reduced; according to the utility model, the abrasion is reduced, so that the abnormal sound generation time caused by abrasion is delayed, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of constant velocity universal joint technology, specifically a low-resistance universal drive shaft. Background Technology

[0002] The ball-cage constant velocity joint is a widely used device in automotive transmission systems. Its main function is to connect two shafts that have an included angle or a change in relative position, and to enable the two shafts to transmit power at the same angular velocity. This overcomes the non-uniform velocity problem of ordinary cross-type universal joints and is particularly suitable for use in steering drive axles.

[0003] The ball-cage type constant velocity universal joint consists of a star-shaped sleeve, a bell-shaped cover, force-transmitting steel balls, and a cage. The drive shaft is mounted on the bell-shaped cover and is an integral structure with the bell-shaped cover. The drive shaft is equipped with splines, which are connected to the surface-fitting spline sleeve for transmission. Power transmission is achieved through the action of the splines and spline grooves, and the joint's telescopic feature adapts to changes in pitch.

[0004] The existing drive shaft is covered with splines, which increases the amount of material used, the overall weight, and the wear. At the same time, the large number of splines and the large contact area also increase wear, making it easy for abnormal noises to occur in the later stages of use, thus affecting the performance. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a low-resistance universal drive shaft to solve the problem of excessive wear caused by the splines covering the surface of existing drive shafts.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A low-resistance universal drive shaft includes a shaft body. The surface of the shaft body is provided with a plurality of large pressure angle splines parallel to the shaft body and equidistantly arranged in the circumferential direction. The large pressure angle splines include long splines and short splines. The long splines and short splines are arranged alternately, and the short splines are located on the surface of the shaft body away from the bell-shaped cover. The top, front and back of the short splines are movably embedded with balls through grooves.

[0008] Preferably, the diameter of the ball does not exceed half the width of the position corresponding to the short spline.

[0009] Preferably, the ball includes a support ball disposed on the top of the short spline, a front sliding ball one, and a back sliding ball two.

[0010] Preferably, the supporting ball is located at the top of the short spline near the bell-shaped cover, and the first sliding ball and the second sliding ball are located on the short spline away from the bell-shaped cover, with the supporting ball, the first sliding ball, and the second sliding ball being staggered left and right.

[0011] Preferably, each of the short splines has multiple supporting balls, sliding balls one, and sliding balls two, which are equidistantly arranged along the short spline.

[0012] Preferably, the length of the short spline is 50%-75% of the length of the long spline.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention reduces friction with the spline groove inside the surface spline sleeve by setting a large pressure angle spline and ball bearings, thereby increasing the pressure angle and replacing sliding friction with rolling friction, thus reducing wear. By setting long and short splines at intervals, it not only meets transmission requirements but also reduces material usage, weight, and resistance, further reducing wear. This invention reduces wear, thereby delaying the occurrence of abnormal noise caused by wear and extending service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural diagram of the shaft body of this utility model;

[0017] Figure 3 This utility model Figure 2 Side sectional view of the corresponding position of the medium-length spline;

[0018] Figure 4 This utility model Figure 2 Side sectional view of the position corresponding to the central support ball;

[0019] Figure 5 This utility model Figure 2 Side cross-section view of the corresponding position of the sliding ball;

[0020] Figure 6 This utility model Figure 2 Side cross-section view of the corresponding position of the middle sliding ball.

[0021] In the diagram: 1. Shaft body; 11. Bell-shaped cover; 2. Large pressure angle spline; 21. Long spline; 22. Short spline; 3. Ball bearings; 31. Supporting ball bearings; 32. Sliding ball bearing one; 33. Sliding ball bearing two. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-6 As shown, this utility model provides a technical solution: a low-resistance universal drive shaft, including a shaft body 1. A plurality of large pressure angle splines 2, parallel to the shaft body 1, are equidistantly arranged along the circumferential direction on the surface of the shaft body 1. Each large pressure angle spline 2 includes a long spline 21 and a short spline 22, the length of which is 50%-75% of the length of the long spline 21. The long splines 21 and short splines 22 are spaced apart, and the short splines 22 are located on the surface of the shaft body 1 away from the bell-shaped cover 11.

[0024] The top, front and back of the short spline 22 are all fitted with balls 3 through grooves. The diameter of the balls 3 does not exceed half the width of the corresponding position of the short spline 22, ensuring that the short spline 22 retains sufficient size to ensure structural strength. The balls 3 include a support ball 31 set on the top of the short spline 22, a sliding ball 32 on the front and a sliding ball 33 on the back.

[0025] The support ball 31 is located at the top of the short spline 22 near the bell-shaped cover 11. The first sliding ball 32 and the second sliding ball 33 are located on the short spline 22 away from the bell-shaped cover 11. The support ball 31, the first sliding ball 32 and the second sliding ball 33 are staggered left and right. There are multiple support balls 31, the first sliding ball 32 and the second sliding ball 33 on each short spline 22, and they are equidistant along the short spline 22. They provide a sliding effect and reduce frictional resistance when the shaft body 1 rotates forward, flips, and slides laterally.

[0026] Working principle:

[0027] By setting a large pressure angle spline 2 and ball bearings 3, the pressure angle of the large pressure angle spline 2 is 30°-45°, which increases the angle based on the existing spline pressure angle. By increasing the pressure angle and replacing sliding friction with rolling friction, the friction with the spline groove inside the surface spline sleeve is reduced, thus reducing wear. By setting long splines 21 and short splines 22 at intervals, since the spline sleeve is installed on the surface of the shaft body 1 at the end away from the bell-shaped cover 11, the large pressure angle spline 2 at the end closer to the bell-shaped cover 11 has a smaller effect than the large pressure angle spline 2 at the end away from the bell-shaped cover 11. Therefore, setting short splines 22 can not only meet the transmission requirements, but also reduce material usage, reduce weight, and reduce resistance, thus reducing wear. This utility model reduces wear, thereby delaying the time when abnormal noise caused by wear occurs and extending service life.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low resistance universal drive shaft spindle comprising a spindle body (1) characterized in that: The surface of the shaft body (1) is provided with a number of large pressure angle splines (2) parallel to the shaft body (1) along the circumferential direction. The large pressure angle splines (2) include long splines (21) and short splines (22). The long splines (21) and short splines (22) are spaced apart, and the short splines (22) are located on the surface of the shaft body (1) away from the bell-shaped cover (11). The top, front and back of the short splines (22) are all movably inlaid with balls (3) through grooves.

2. A low drag universal drive shaft as in claim 1, wherein: The diameter of the ball (3) does not exceed half the width of the corresponding position of the short spline (22).

3. A low drag universal drive shaft as in claim 1, wherein: The ball (3) includes a support ball (31) disposed on the top of the short spline (22), a front sliding ball (32) and a back sliding ball (33).

4. A low drag universal drive shaft as defined in claim 3, wherein: The support ball (31) is located at the top of the short spline (22) near the bell-shaped cover (11), and the first sliding ball (32) and the second sliding ball (33) are located on the short spline (22) away from the bell-shaped cover (11), and the support ball (31), the first sliding ball (32) and the second sliding ball (33) are offset to the left and right.

5. A low drag universal drive shaft as defined in claim 4, wherein: Each of the short splines (22) has multiple support balls (31), sliding balls one (32) and sliding balls two (33) and they are equidistantly arranged along the short splines (22).

6. A low drag universal driveshaft rod as defined in claim 1, wherein: The length of the short spline (22) is 50%-75% of the length of the long spline (21).

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