Automobile steering transmission worm

Abstract

The utility model relates to an automobile steering transmission worm, and relates to the technical field of worms. The worm comprises a worm body installed on a shell, a plurality of bosses are arranged on the side wall of the worm body and evenly distributed in the circumferential direction of the worm body, and the ends, away from the worm body, of the bosses make contact with the shell. The worm has the advantages that the side wall of the worm body cannot collide with the shell, and the worm body is not prone to deformation or damage.

Description

Technical Field

[0001] The present application relates to the field of worm gears, and in particular to a steering transmission worm gear for an automobile. Background Art

[0002] In automotive steering systems, a worm usually refers to a helical gear that is used in conjunction with a worm wheel, which together form a worm-worm gear mechanism. The role of this mechanism in the steering system is to convert input rotational motion into output rotational motion, while achieving the purpose of reducing speed and increasing torque. The worm-worm gear mechanism has different applications in different types of steering systems, including mechanical steering systems, hydraulic power steering systems, and electric power steering systems.

[0003] With the development of the automobile industry, the automobile steering system has received more and more attention in terms of safety, comfort and flexibility. As an important power transmission and steering control component, the worm is widely used in automobile steering systems. Domestic and foreign scholars and engineers have conducted in-depth research and development on the worm, and are committed to improving its performance and reliability.

[0004] The worm is generally mounted on a housing, wherein the housing is a fixed structure of the worm transmission. During the transmission process, the worm is limited by the housing, which makes it easy for the side wall of the worm to collide with the housing, resulting in deformation or damage, so there is room for improvement. Utility Model Content

[0005] In order to improve the problem that the worm is easily deformed or damaged due to collision with the housing, the present application provides an automobile steering transmission worm.

[0006] The present application provides an automobile steering transmission worm gear adopting the following technical solution:

[0007] A steering transmission worm for an automobile comprises a worm body mounted on a housing, a side wall of the worm body is provided with a plurality of bosses which are evenly distributed along the circumference of the worm body, and an end of the boss away from the worm body contacts the housing.

[0008] By adopting the above technical solution, when in use, the worm body is first installed on the housing, and the housing is a fixed structure of the worm transmission. The worm body can rotate on the housing with the central axis of the worm body as the axis. When the worm body rotates, the plurality of bosses abut and slide on the housing, thereby enhancing the rigidity of the worm body and preventing deformation or damage when running at high speed or bearing a large load. At the same time, the uniform distribution of the plurality of bosses helps to optimize the stress distribution of the worm body, reduce stress concentration, and thus improve its overall load-bearing capacity.

[0009] The boss abuts against the shell, which can fill the gap between the worm body and the shell and play a supporting role, making it difficult for the worm body to shift during rotation, that is, the worm body is not easily damaged by collision with the shell and is more stable. It not only extends the service life of the worm body, but also makes the worm body more stable during operation and reduces vibration and noise.

[0010] Optionally, a plurality of oil storage grooves are provided on the side wall of the worm body, and the plurality of oil storage grooves correspond to the bosses one by one and are located on one side of the bosses.

[0011] By adopting the above technical solution, the lubricating oil in the oil storage tank will flow out from the opening of the oil storage tank and seep between the worm body and the housing, so that the lubricating oil is attached to the side walls of the worm body and the housing, which plays a lubricating role, reduces the friction of the worm body moving on the housing, and facilitates the transmission of the worm body.

[0012] Optionally, a ball is provided on one end of the boss away from the worm body, and the ball is in contact with the housing.

[0013] By adopting the above technical solution, when the worm body rotates and the boss moves on the housing, the side wall of the ball abuts against the housing, and the side wall of the ball has no edges and corners, which prevents the boss from being scraped and worn on the housing, thereby extending the service life of the boss and the housing. At the same time, the arc surface of the ball can also serve as a guide to facilitate the movement of the boss.

[0014] Optionally, the ball is rotatably connected to the boss via a rotating shaft.

[0015] By adopting the above technical solution, when the boss moves, the ball slides on the shell, so that the roller rotates around the shaft, and the sliding friction between the ball and the shell is converted into rolling friction, reducing the friction force, thereby facilitating the movement of the boss and facilitating the transmission of the worm body.

[0016] Optionally, a sponge is provided on the side wall of the ball, and the sponge is in contact with the shell.

[0017] By adopting the above technical solution, the sponge is soft and plays a protective role, so that the ball will not have a hard contact with the shell, so that the ball and the shell are not easy to wear, thereby extending the service life.

[0018] Optionally, a cavity for storing lubricating oil is provided in the boss, and the sponge is connected to the cavity.

[0019] By adopting the above technical solution, the lubricating oil in the cavity penetrates the sponge and is absorbed by the sponge. When the worm body rotates and drives the sponge to slide on the shell, the sponge penetrates the lubricating oil to the shell to play a lubricating role, reduce the friction between the sponge and the shell, and further improve the convenience of moving the boss.

[0020] Optionally, the cavity is communicated with an oil storage tank.

[0021] By adopting the above technical solution, during the rotation of the worm body, the lubricating oil continuously shuttles between the cavity and the oil storage tank, so that the lubricating oil in the cavity and the oil storage tank replenish each other, thereby ensuring that the cavity and the oil storage tank always have lubricating oil to achieve the purpose of lubricating the ball and the housing.

[0022] Optionally, a plurality of connecting holes are provided in the worm body, the plurality of connecting holes are parallel to each other, and one end of the connecting rod is connected to the cavity, and the other end is connected to the oil storage tank.

[0023] By adopting the above technical solution and setting a plurality of connecting holes, even when the amount of lubricating oil is small, it can still flow out from the corresponding connecting holes, thereby facilitating the lubricating oil to flow back and forth between the cavity and the lubricating oil.

[0024] In summary, the present application includes at least one of the following beneficial effects:

[0025] 1. When the worm body rotates, several bosses abut and slide on the shell, which enhances the rigidity of the worm body and prevents deformation or damage when running at high speed or under heavy load. At the same time, the uniform distribution of several bosses helps to optimize the stress distribution of the worm body, reduce stress concentration, and thus improve its overall bearing capacity. The boss abuts against the shell, which can fill the gap between the worm body and the shell and play a supporting role, making it difficult for the worm body to deviate during rotation, that is, the worm body is not easy to collide with the shell and be damaged, and is more stable, which not only extends the service life of the worm body, but also makes the worm body more stable during operation, reducing vibration and noise. ;

[0026] 2. The lubricating oil in the oil storage tank will flow out from the opening of the oil storage tank and seep between the worm body and the housing, so that the lubricating oil is attached to the side walls of the worm body and the housing, which plays a lubricating role, reduces the friction of the worm body moving on the housing, and facilitates the transmission of the worm body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the steering transmission worm of an automobile according to an embodiment of the present application;

[0028] Figure 2 for Figure 1 The cross-section at A in the middle;

[0029] Figure 3 for Figure 2 Enlarged view of point B in the middle.

[0030] In the figure: 10, worm body; 11, oil storage tank; 12, connecting hole; 20, boss; 21, cavity; 30, ball; 31, sponge; 40, rotating shaft. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The present application embodiment discloses a steering transmission worm gear for an automobile. Figure 1 and Figure 2 The automobile steering transmission worm comprises a worm body 10, the end of which is mounted on a housing, and the worm body 10 can rotate on the housing with the central axis of the worm body 10 as an axis.

[0033] Reference Figure 2 and Figure 3 Four bosses 20 are integrally formed on the side wall of the worm body 10. The four bosses 20 are evenly distributed along the circumference of the worm body 10. A rotating shaft 40 is fixed to one end of the boss 20 away from the worm body 10. A ball 30 is sleeved on the rotating shaft 40, and the side wall of the ball 30 abuts against the shell.

[0034] When the worm body 10 is transmitting, that is, the worm body 10 rotates, the boss 20 drives the ball 30 to slide on the shell, so that the ball 30 rotates on the shaft 40 with the shaft 40 as the axis, and then the sliding friction between the ball 30 and the shell is converted into rolling friction, reducing the friction force, thereby facilitating the movement of the boss 20 and facilitating the transmission of the worm body 10.

[0035] Reference Figure 2 and Figure 3 The arrangement of the bosses 20 enhances the rigidity of the worm body 10 and prevents deformation or damage when the worm body 10 is operated at high speed or subjected to a large load. At the same time, the uniform distribution of the bosses 20 helps to optimize the stress distribution of the worm body 10, reduce stress concentration, and thus improve its overall load-bearing capacity.

[0036] The ball 30 abuts against the shell, which can fill the gap between the worm body 10 and the shell and play a supporting role, making it difficult for the worm body 10 to shift during rotation, that is, the worm body 10 is not easily damaged by collision with the shell and is more stable. This not only extends the service life of the worm body 10, but also makes the worm body 10 more stable during operation and reduces the generation of vibration and noise.

[0037] Reference Figure 2 and Figure 3In order to reduce the wear caused by the sliding of the ball 30 on the shell, a sponge 31 is fixed on the ball 30 so that the sponge 31 directly contacts the shell. The sponge 31 is made of a relatively soft material and can play a protective role, so that the ball 30 will not have a hard contact with the shell, thereby making the ball 30 and the shell less prone to wear, thereby extending the service life.

[0038] Reference Figure 2 and Figure 3 In order to further reduce the friction of the boss 20, a cavity 21 is provided in the boss 20, and lubricating oil is stored in the cavity 21. The sponge 31 blocks the opening of the cavity 21, that is, the sponge 31 can directly contact the lubricating oil in the cavity 21, thereby absorbing the lubricating oil. When the worm body 10 rotates and drives the sponge 31 to slide on the shell, the sponge 31 penetrates the lubricating oil onto the shell, plays a lubricating role, reduces the friction between the sponge 31 and the shell, and improves the convenience of the boss 20 to move.

[0039] Reference Figure 2 and Figure 3 In order to facilitate the rotation of the worm body 10 on the housing, four oil storage grooves 11 are opened on the side wall of the worm body 10. The four oil storage grooves 11 correspond to the bosses 20 one by one, and the oil storage grooves 11 are adjacent to the bosses 20. Lubricating oil is also stored in the oil storage grooves 11. During the use of the worm structure, the lubricating oil in the oil storage grooves 11 will flow out from the openings of the oil storage grooves 11 and penetrate between the worm body 10 and the housing, that is, the lubricating oil is attached to the side walls of the worm body 10 and the housing, which plays a lubricating role, reduces the friction of the worm body 10 moving on the housing, and facilitates the transmission of the worm body 10.

[0040] Reference Figure 2 and Figure 3 A plurality of connecting holes 12 are provided on the worm body 10 , and a plurality of connecting rods are parallel to each other and evenly arranged along the radial direction of the cross section of the worm body 10 . One end of the connecting rod is connected to the cavity 21 , and the other end is connected to the oil storage tank 11 .

[0041] During the rotation of the worm body 10, the position of the boss 20 is constantly reversed, and the arrangement of the plurality of connecting holes 12 allows the lubricant to flow out from the corresponding connecting holes 12 regardless of whether the amount of lubricant is small or large, so that the lubricant continuously shuttles between the cavity 21 and the oil storage tank 11, so that the lubricant in the cavity 21 and the oil storage tank 11 replenish each other, thereby ensuring that the cavity 21 and the oil storage tank 11 always have lubricant to achieve the purpose of lubricating the ball 30 and the housing.

[0042] In the embodiment of the present application, it is supplemented that the induction heat treatment at the position of the worm boss 20 plays a role in improving the hardness and wear resistance. By performing induction heat treatment on the boss 20, its microstructure can be changed to make it denser and harder. In this way, the compression resistance and wear resistance of the boss 20 can be enhanced to prevent failure due to wear or fatigue during long-term use.

[0043] The implementation principle of the automobile steering transmission worm of the embodiment of the present application is as follows: when in use, the worm body 10 is first installed on the housing, and the housing is a fixed structure of the worm transmission. The worm body 10 can rotate on the housing with the central axis of the worm body 10 as the axis. When the worm body 10 rotates, a plurality of bosses 20 abut and slide on the housing to enhance the rigidity of the worm body 10 and prevent deformation or damage when running at high speed or bearing a large load. At the same time, the uniform distribution of a plurality of bosses 20 helps to optimize the stress distribution of the worm body 10, reduce stress concentration, and thus improve its overall load-bearing capacity.

[0044] The boss 20 abuts against the shell, which can fill the gap between the worm body 10 and the shell and play a supporting role, making it difficult for the worm body 10 to shift during rotation, that is, the worm body 10 is not easily damaged by collision with the shell and is more stable. It not only extends the service life of the worm body 10, but also makes the worm body 10 more stable during operation and reduces the generation of vibration and noise.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steering worm gear for an automobile, characterized in that: The invention comprises a worm body (10) mounted on a housing, wherein a plurality of bosses (20) are arranged on the side wall of the worm body (10), the plurality of bosses (20) are evenly distributed along the circumference of the worm body (10), and one end of the boss (20) away from the worm body (10) contacts the housing.

2. The automobile steering transmission worm according to claim 1, characterized in that: A plurality of oil storage grooves (11) are provided on the side wall of the worm body (10); the plurality of oil storage grooves (11) correspond to the bosses (20) one by one and are located on one side of the bosses (20).

3. The automobile steering transmission worm according to claim 2, characterized in that: A ball (30) is provided on one end of the boss (20) away from the worm body (10), and the ball (30) is in contact with the housing.

4. The automobile steering transmission worm according to claim 3, characterized in that: The ball (30) is rotatably connected to the boss (20) via a rotating shaft (40).

5. The automobile steering transmission worm according to claim 3, characterized in that: A sponge (31) is provided on the side wall of the ball (30), and the sponge (31) is in contact with the shell.

6. The automobile steering transmission worm according to claim 5, characterized in that: A cavity (21) for storing lubricating oil is provided in the boss (20), and the sponge (31) is in communication with the cavity (21).

7. The automobile steering transmission worm according to claim 6, characterized in that: The cavity (21) is communicated with the oil storage tank (11).

8. The automobile steering transmission worm gear according to claim 6, characterized in that: A plurality of connection holes (12) are provided in the worm body (10), the plurality of connection holes (12) are parallel to each other, one end of the connection hole (12) is connected to the cavity (21), and the other end is connected to the oil storage tank (11).

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