Anti-fatigue damping type constant-speed driving shaft assembly with bearing unit

Abstract

The utility model discloses an anti-fatigue damping type constant-speed driving shaft assembly with a bearing unit. The driving shaft assembly mainly solves the problem that in a transmission structure of a conventional driving shaft assembly, a fixed joint conducts transmission through a spline on a half shaft, and the bearing capacity is not high. The mounting structure is characterized by further comprising a mounting hole (211) formed in the axial outer wall of the shell and a second mounting hole (411) formed in the flange plate and connected with the mounting hole through a fastener; one end of the elastic piece (24) abuts against the axial outer wall of the shell, and the other end of the elastic piece (24) abuts against the axial wall of the flange plate. According to the anti-fatigue damping type constant-speed driving shaft assembly with the bearing unit, a traditional fixed end outer ball cage rod spline is omitted, an installation hole is formed in the datum plane of an outer ball cage, an elastic piece is additionally arranged in an inner hole of the datum plane, and after the outer ball cage and a hub unit are assembled, the outer ball cage and the hub unit can be fixed under the action of the elastic piece. The ball cage plays a role in impact resistance and shock absorption, the usability of the driving shaft is effectively protected, the fracture risk of the shaft rod is reduced, and the bearing capacity is higher.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to an anti-fatigue and shock-absorbing constant-speed drive shaft assembly with a bearing unit. Background Art

[0002] With the continuous development of the automobile industry, people have higher and higher requirements for the performance of automobiles. In order to make the output shaft and the input shaft in the same plane rotate at the same speed in the automobile transmission system, a constant velocity joint drive shaft assembly with double universal joint transmission is often used. The constant velocity joint drive shaft assembly is a power transmission device between the automobile engine and the drive wheel, which is used to provide the traction and vehicle speed required by the automobile under various working conditions, and at the same time, the two can be coordinated and have a sufficient range of change to ensure that the left and right drive wheels of the automobile can adapt to the differential requirements. Therefore, the performance and quality of the constant velocity joint drive shaft assembly directly affect the vehicle performance and driving safety of the automobile. In the prior art, the structure of the constant velocity joint drive shaft assembly is generally as follows: one end is a fixed ball cage universal joint, the other end is a movable joint telescopic ball cage universal joint, and the middle is an intermediate shaft connecting the fixed joint and the movable joint. Among them, the fixed joint is mainly composed of a bell-shaped housing, a retaining frame, a steel ball, a star-shaped sleeve and other accessories, and the movable joint is composed of an outer shell and a retaining frame, a steel ball, a star-shaped sleeve and other accessories. The fixed joint and the movable joint are connected to the intermediate shaft through splines and fixed with elastic retaining rings.

[0003] In conventional transmission structures, the fixed joint is driven by the splines on the half-shaft, and the load-bearing capacity is not strong. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model provides a fatigue-resistant and shock-absorbing constant-speed drive shaft assembly with a bearing unit, which mainly solves the problem that in the transmission structure of the conventional drive shaft assembly, the fixed node is transmitted through the spline on the half shaft and the load-bearing capacity is not strong.

[0005] The technical solution of the utility model is:

[0006] The fatigue-resistant and vibration-damping constant-speed drive shaft assembly with a bearing unit comprises an intermediate shaft, one end of the intermediate shaft is provided with a first universal joint, and the other end is provided with a second universal joint, one end of the first universal joint is connected to a bearing unit, the first universal joint comprises a housing, the bearing unit comprises a flange, and also comprises a mounting hole, which is provided on the axial outer wall of the housing,

[0007] A second mounting hole is provided on the flange and connected to the mounting hole via a fastener;

[0008] The elastic member has one end pressed against the axial outer wall of the shell, and the other end pressed against the axial wall of the flange.

[0009] The elastic member is a spring.

[0010] The housing and the flange are both provided with mounting grooves for part of the spring to extend into.

[0011] The fastener is a bolt.

[0012] The bearing unit also includes an outer ring, a retaining frame is arranged inside the outer ring, a ball is arranged on the retaining frame, a first groove matching with the ball is arranged on the outer wall of the shell, and a second groove matching with the ball is arranged on the outer wall of the flange.

[0013] The bearing unit also includes an outer ring, a retaining frame is provided inside the outer ring, a ball is provided on the retaining frame, a detachably connected ring is provided on the outer wall of the shell, the ring is provided with a third groove that cooperates with the ball, and the outer wall of the flange is provided with a fourth groove that cooperates with the ball.

[0014] It also includes a dust cover, one end of which is connected to the circumferential outer wall of the shell, and the other end of which is connected to the circumferential outer wall of the intermediate shaft.

[0015] The beneficial effects of the utility model are as follows: the utility model provides a fatigue-resistant and shock-absorbing constant-speed drive shaft assembly with a bearing unit, the splines of the traditional fixed-end outer ball cage rod are eliminated, the outer ball cage reference surface is designed with a mounting hole, and an elastic part is added to the inner hole of the reference surface. After the outer ball cage and the wheel hub unit are assembled, the ball cage plays an impact-resistant and shock-absorbing role under the action of the elastic part, effectively protecting the usability of the drive shaft, reducing the risk of shaft breakage, and having a stronger load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0017] Figure 2 It is a partial cross-sectional schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings: as shown in the figure, the fatigue-resistant and shock-absorbing constant-speed drive shaft assembly with a bearing unit includes an intermediate shaft 1, a first universal joint 2 is provided at one end of the intermediate shaft, and a second universal joint 3 is provided at the other end, a bearing unit 4 is connected to one end of the first universal joint, the first universal joint includes a housing 21, the bearing unit includes a flange 41, and also includes a mounting hole 211, which is provided on the axial outer wall of the housing, a second mounting hole 411, which is provided on the flange and connected to the mounting hole through a fastener 40; an elastic member 24, one end of which is pressed against the axial outer wall of the housing, and the other end of which is pressed against the axial wall of the flange. The spline of the rod of the traditional fixed end outer ball cage is cancelled, and the mounting hole is designed on the reference surface of the outer ball cage, and an elastic part is added to the inner hole of the reference surface. After the outer ball cage is assembled with the wheel hub unit, the ball cage plays the role of impact resistance and shock absorption under the action of the elastic part, effectively protecting the usability of the drive shaft, reducing the risk of shaft fracture, and having a stronger load-bearing capacity. The spline of the traditional drive shaft is prone to severe wear during use, causing abnormal noise of the ball cage. In addition, the shock-absorbing compression spring is installed in the inner hole of the end face of the outer ball cage, which plays the role of shock absorption and impact resistance for the ball cage under complex road conditions, effectively improving the anti-fatigue performance of the drive shaft. The power transmission of the entire drive shaft assembly is uniform and efficient, and the transportation is stable and safe. Moreover, under the support of the shock-absorbing compression spring, the bolts are not easy to loosen, and the shaking and noise caused by high-speed operation can be eliminated in time, thereby effectively improving the service life of the drive shaft assembly.

[0019] In this embodiment, as shown in the figure, the elastic member is a spring, specifically a compression spring.

[0020] In this embodiment, as shown in the figure, the housing and the flange are both provided with mounting grooves for part of the spring to extend into, so as to prevent the spring from falling out and make the use more stable.

[0021] In this embodiment, as shown in the figure, the fastener is a bolt.

[0022] In this embodiment, as shown in the figure, the bearing unit further includes an outer ring 42, a retainer 43 is provided inside the outer ring, a ball 431 is provided on the retainer, a first groove matching the ball is provided on the outer wall of the housing, and a second groove matching the ball is provided on the outer wall of the flange. The bearing is used in conjunction with the outer cage housing to support the outer cage, greatly reducing the bearing capacity of the bolts and reducing the vibration of the drive shaft assembly during operation.

[0023] In this embodiment, as shown in the figure, the bearing unit also includes an outer ring 42, a retainer 43 is provided inside the outer ring, a ball 431 is provided on the retainer, a detachable sleeve 432 is provided on the outer wall of the housing, the sleeve is provided with a third groove for matching with the ball, and the outer wall of the flange is provided with a fourth groove for matching with the ball. The bearing is used in conjunction with the outer cage housing to support the outer cage, greatly reducing the bearing capacity of the bolts and reducing the shaking of the drive shaft assembly during operation. The sleeve is provided for easy replacement.

[0024] In this embodiment, as shown in the figure, a dust cover 51 is further included, one end of which is connected to the circumferential outer wall of the housing, and the other end of which is connected to the circumferential outer wall of the intermediate shaft, to prevent dust from entering the housing.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A fatigue-resistant and vibration-damping constant-velocity drive shaft assembly with a bearing unit, comprising an intermediate shaft (1), one end of the intermediate shaft being provided with a first universal joint (2), and the other end being provided with a second universal joint (3), one end of the first universal joint being connected to a bearing unit (4), the first universal joint comprising a housing (21), and the bearing unit comprising a flange (41), characterized in that: Also includes The mounting hole (211) is provided on the axial outer wall of the housing, A second mounting hole (411) is provided on the flange and connected to the mounting hole via a fastener (40); An elastic member (24) has one end pressed against the axial outer wall of the shell, and the other end pressed against the axial wall of the flange.

2. The fatigue-resistant and vibration-damping constant velocity drive shaft assembly with a bearing unit according to claim 1, characterized in that: The elastic member is a spring.

3. The fatigue-resistant and vibration-damping constant velocity drive shaft assembly with a bearing unit according to claim 2, characterized in that: The housing and the flange are both provided with mounting grooves for part of the spring to extend into.

4. The fatigue-resistant and vibration-damping constant velocity drive shaft assembly with a bearing unit according to claim 3 is characterized in that: The fastener is a bolt.

5. The fatigue-resistant and vibration-damping constant velocity drive shaft assembly with a bearing unit according to claim 4, characterized in that: The bearing unit further comprises an outer ring (42), a retaining frame (43) is provided inside the outer ring, a rolling ball (431) is provided on the retaining frame, a first groove cooperating with the rolling ball is provided on the outer wall of the housing, and a second groove cooperating with the rolling ball is provided on the outer wall of the flange.

6. The fatigue-resistant and vibration-damping constant velocity drive shaft assembly with a bearing unit according to claim 4, characterized in that: The bearing unit further comprises an outer ring (42), a retaining frame (43) is provided inside the outer ring, a ball (431) is provided on the retaining frame, a detachably connected ring (432) is provided on the outer wall of the housing, the ring is provided with a third groove cooperating with the ball, and the outer wall of the flange is provided with a fourth groove cooperating with the ball.

7. The fatigue-resistant and vibration-damping constant velocity drive shaft assembly with a bearing unit according to claim 6, characterized in that: It also includes a dust cover (51), one end of which is connected to the circumferential outer wall of the housing, and the other end of which is connected to the circumferential outer wall of the intermediate shaft.

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