Heat-dissipation wear-resistant driving shaft assembly inner ball cage

Abstract

The utility model discloses a heat-dissipation wear-resistant driving shaft assembly inner ball cage which comprises a connecting shaft and an inner ball cage shell. The heat dissipation mechanism comprises an annular groove formed in the outer side of the inner spherical cage shell, two semi-annular plates are symmetrically arranged in the annular groove, the two semi-annular plates make contact with the inner wall of the annular groove, and a plurality of fan blades are fixedly connected to the outer side of each semi-annular plate; the connecting mechanism is used for connecting the semi-annular plates and the annular groove, a flexible dustproof sleeve is arranged between the outer side of the connecting shaft and the inner ball cage shell, the two semi-annular plates are made of aluminum-silicon alloy, and magnetic connecting strips are fixedly connected to the opposite sides of the two semi-annular plates. And the adjacent surfaces of every two matched magnetic connecting strips attract each other by opposite poles. The part, generating the vortex, of the inner ball cage is of a split type structure, and therefore the part can be detached and cleaned conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a heat dissipating and wear-resistant inner ball cage of a drive shaft assembly. Background Art

[0002] The ball joint, also called the constant velocity universal joint, is an important component in the car transmission system. Its function is to transfer the engine power from the transmission to the two front wheels to drive the car at high speed.

[0003] It transmits motion and torque while changing the working angle and performing telescopic sliding. The above functions are mainly realized by the inner and outer ball cages in the constant velocity universal joint assembly. The inner ball cage includes a bell-shaped shell, a star-shaped sleeve, a cage and a steel ball. The steel ball rotates at high speed in the cage, and then the steel ball rolls against the inner wall of the bell-shaped shell and the outer wall of the star-shaped sleeve respectively. During the friction process, a large amount of heat will be generated between the steel ball and the inner wall of the bell-shaped shell and between the steel ball and the outer wall of the star-shaped sleeve. If the heat cannot be dissipated in time, it will affect the service life of the inner ball cage.

[0004] To this end, the utility model patent with publication number CN206309807U discloses an inner ball cage, including a bell-shaped shell, a star-shaped sleeve is arranged in the bell-shaped shell, a retaining frame is connected between the bell-shaped shell and the star-shaped sleeve, a plurality of steel balls are fixed on the retaining frame, a plurality of heat sinks are arranged on the outer surface of the bell-shaped shell along the axial direction of the shell surface, and heat sink grooves are formed between adjacent heat sinks, the depth of the heat sink grooves gradually decreases from the open end to the closed end of the bell-shaped shell, and the heat sinks are arranged inclined to the same side. The utility model can quickly conduct the heat generated by the rolling friction between the steel ball and the inner wall of the bell shell and the outer wall of the star sleeve to the heat sink and take it away through the gas vortex to achieve the purpose of rapid heat dissipation. At the same time, the inner ball cage has a compact structure and does not occupy too much space at the bottom of the car. It takes away the heat through the gas vortex on it. However, in actual use, since it is located at the bottom of the vehicle, dust will adhere to it more or less as the vehicle travels. In this way, when the dust on the entire outer shell of the inner ball cage accumulates to a certain extent, it will affect the heat dissipation. In order to generate vortex, the above structure leads to multiple groove structures on the outer shell of the inner ball cage, and it is an integrated structure, which makes it more troublesome to clean it. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art and proposes a heat dissipating and wear-resistant inner ball cage of a drive shaft assembly. The part of the inner ball cage that generates eddy currents adopts a split structure, which greatly facilitates the disassembly and cleaning of the part.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A heat-dissipating and wear-resistant inner ball cage of a drive shaft assembly, comprising a connecting shaft and an inner ball cage shell; a heat dissipation mechanism, the heat dissipation mechanism comprising an annular groove opened on the outer side of the inner ball cage shell, two semi-annular plates being symmetrically arranged in the annular groove, the two semi-annular plates being in contact with the inner wall of the annular groove, and a plurality of fan blades being fixedly connected to the outer side of each semi-annular plate; a connecting mechanism, the connecting mechanism being used to connect the semi-annular plates and the annular groove.

[0008] Preferably, a flexible dust cover is provided between the outer side of the connecting shaft and the inner cage housing. Preferably, both of the two semi-annular plates are made of aluminum silicon alloy.

[0009] Preferably, the opposite sides of the two semi-annular plates are fixedly connected with magnetic connecting strips. Preferably, the adjacent surfaces of each two matching magnetic connecting strips are anisotropically attracted to each other.

[0010] Preferably, the connection mechanism comprises threaded openings symmetrically provided on the inner walls of the left and right sides of the annular groove, and the two semi-annular plates are both provided with limit screws, and the opposite ends of the two limit screws extend into the corresponding threaded openings and are threadedly connected with the corresponding threaded openings. Compared with the prior art, the utility model has the following beneficial effects:

[0011] Through the setting of the fan blades, when the inner ball cage shell rotates during use, airflow will be generated through the setting of multiple fan blades, which will accelerate the gas flow of the entire inner ball cage part, achieve heat dissipation, and improve its wear resistance. Through the split setting, when the heat dissipation part needs to be cleaned, it is only necessary to remove the screws. During subsequent installation, the magnetic limiter can be used to complete the positioning first, and then the screws can be connected. The overall operation is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of a heat dissipating and wear-resistant inner ball cage of a drive shaft assembly proposed by the utility model;

[0013] Figure 2 for Figure 1 A magnified image of point A;

[0014] Figure 3 for Figure 1 Schematic diagram of removing the eddy current part.

[0015] In the figure: 1 connecting shaft, 2 inner ball cage shell, 3 flexible dust cover, 4 semi-annular plate, 5 fan blade, 6 annular groove, 7 threaded mouth, 8 magnetic connecting strip, 9 limit screw. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] Reference Figure 1-Figure 3 , a heat dissipating and wear-resistant inner ball cage of a drive shaft assembly, comprising a connecting shaft 1 and an inner ball cage shell 2, wherein a flexible dust cover 3 is arranged between the outer side of the connecting shaft 1 and the inner ball cage shell 2;

[0018] The heat dissipation mechanism is also included, and the heat dissipation mechanism includes an annular groove 6 opened on the outer side of the inner cage shell 2, and two semi-annular plates 4 are symmetrically arranged in the annular groove 6, and the two semi-annular plates 4 are in contact with the inner wall of the annular groove 6. A plurality of fan blades 5 are fixedly connected to the outer side of each semi-annular plate 4, and the two semi-annular plates 4 are made of aluminum silicon alloy. The opposite sides of the two semi-annular plates 4 are fixedly connected with magnetic connecting strips 8, and the adjacent surfaces of each two matching magnetic connecting strips 8 are attracted to each other by anisotropy;

[0019] The connecting mechanism is also included, and the connecting mechanism is used to connect the semi-circular plate 4 and the annular groove 6. The connecting mechanism includes threaded openings 7 symmetrically opened on the inner walls of the left and right sides of the annular groove 6. The two semi-circular plates 4 are both penetrated by limit screws 9. The opposite ends of the two limit screws 9 extend into the corresponding threaded openings 7 and are threadedly connected with the corresponding threaded openings 7. In the utility model, during the specific operation, the inner cage shell 2 moves with the movement of the vehicle.

[0020] The fan blades 5 will rotate, and airflow will be generated by setting a plurality of fan blades 5 to accelerate the gas flow of the entire inner cage part to achieve heat dissipation, thereby reducing the temperature of the lubricating oil inside the inner cage shell 2, avoiding the situation where the lubricating oil temperature is too high and the lubrication effect is reduced, thereby improving the overall wear resistance;

[0021] After using it for a period of time, the two semi-annular plates 4 can be removed by the limit screws 9 and can be directly cleaned. Compared with the existing one-piece design, this cleaning method is simpler; during subsequent installation, the two semi-annular plates 4 are brought close together and connected into a ring body by magnetic limiting. At this time, release your hands and limit the position by the limit screws 9.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat dissipating and wear-resistant inner cage of a drive shaft assembly, characterized in that: include: Connecting the shaft (1) and the inner cage housing (2); A heat dissipation mechanism, the heat dissipation mechanism comprising an annular groove (6) provided on the outer side of the inner cage shell (2), two semi-annular plates (4) being symmetrically arranged in the annular groove (6), the two semi-annular plates (4) being in contact with the inner wall of the annular groove (6), and a plurality of fan blades (5) being fixedly connected to the outer side of each semi-annular plate (4); A connecting mechanism is used to connect the semi-annular plate (4) and the annular groove (6).

2. The heat dissipating and wear-resistant inner cage of a drive shaft assembly according to claim 1, characterized in that: A flexible dust cover (3) is provided between the outer side of the connecting shaft (1) and the inner cage shell (2).

3. The heat dissipating and wear-resistant inner cage of a drive shaft assembly according to claim 1, characterized in that: The two semi-annular plates (4) are both made of aluminum silicon alloy.

4. The heat dissipating and wear-resistant inner cage of a drive shaft assembly according to claim 1, characterized in that: Opposite sides of the two semi-annular plates (4) are fixedly connected with magnetic connection strips (8).

5. The heat dissipating and wear-resistant inner cage of a drive shaft assembly according to claim 4, characterized in that: The adjacent surfaces of every two matching magnetic connection strips (8) attract each other with opposite polarities.

6. The heat dissipating and wear-resistant inner cage of a drive shaft assembly according to claim 1, characterized in that: The connection mechanism comprises threaded openings (7) symmetrically arranged on the inner walls of the left and right sides of the annular groove (6); limit screws (9) are provided through the two semi-annular plates (4); the opposite ends of the two limit screws (9) extend into the corresponding threaded openings (7) and are threadedly connected to the corresponding threaded openings (7).

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