Steering gear pull rod lightweight structure

Abstract

A steering gear pull rod lightweight structure comprises a ball seat, a ball head arranged in the ball seat and a ball pin arranged at one end of the ball head, the end of the ball pin is connected with a pull rod body, the ball seat is sleeved with a ball shell matched with the ball seat, and the pull rod body is tubular; the right end of the ball pin rightwards penetrates into the left end opening of the pull rod main body; external threads are arranged on the outer wall of the right end, penetrating into the pull rod body, of the ball pin, and the left end of the pull rod body is fixed to the right end of the ball pin through riveting; an internal thread is arranged on the inner wall of the right part of the pull rod main body; a limiting piece is screwed in the right part of the pull rod main body through the internal thread; a supporting structure located in the pull rod body is arranged between the left side wall of the limiting piece and the right end face of the ball pin and can support the inner wall of the left portion of the pull rod body. According to the steering gear pull rod lightweight structure, lightweight can be achieved, the pressure bearing capacity can be guaranteed, and the situation of deformation is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of steering gear pull rods, in particular to a lightweight structure of a steering gear pull rod. Background Art

[0002] The steering gear is a key component in the automobile steering system. It drives the tires to achieve steering by transmitting force from the steering wheel to the steering transmission mechanism and changing the direction of force transmission. Under the national context of energy conservation and emission reduction, reducing resource consumption has become an important consideration in product design and production. Automobile steering gears need to be designed to reduce weight and lightweight to reduce vehicle load, improve vehicle power effect, reduce energy and resource consumption, and reduce exhaust emissions. If the lightweighting of the tie rod is achieved simply by reducing weight, it will easily lead to the weakening of the steering gear tie rod's pressure-bearing capacity and easy deformation, posing certain safety hazards. Summary of the Invention

[0003] The utility model aims to solve the existing technical problem and provide a lightweight structure of a steering gear pull rod, which can not only achieve lightweight, but also ensure pressure bearing capacity and effectively avoid deformation.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] The utility model discloses a lightweight structure of a steering gear tie rod, comprising a ball seat, a ball head arranged in the ball seat and a ball pin arranged at one end of the ball head, the end of the ball pin is connected to a tie rod body, the ball seat is covered with a ball shell matching it, and the tie rod body is tubular; the right end of the ball pin penetrates to the right into the port at the left end of the tie rod body; the outer wall of the right end of the ball pin inserted into the tie rod body is provided with an external thread, and the left end of the tie rod body is fixed to the right end of the ball pin by riveting; the inner wall of the right part of the tie rod body is provided with an internal thread, and a limit piece is screwed into the right part of the tie rod body through the internal thread; a support structure located in the tie rod body is provided between the left side wall of the limit piece and the right end face of the ball pin, and the support structure can support the inner wall of the left part of the tie rod body.

[0006] The support structure includes a center column arranged between the left side wall of the limit member and the right end face of the ball pin; a number of main support rods evenly distributed around the circumference are provided outside the center column; a main support plate is provided at the end of the main support rod and fits with the inner wall of the pull rod body; the outer wall of the main support plate is arc-shaped and fits with the inner wall of the pull rod body.

[0007] The outer wall of the central column is provided with a number of auxiliary support rods evenly distributed in a circle; the position of the auxiliary support rod corresponds to the gap between two axially adjacent main support rods; a secondary support plate is provided at the end of the auxiliary support rod; the outer wall of the auxiliary support plate is arc-shaped and fits with the inner wall of the pull rod body; the position of the auxiliary support plate corresponds to the gap between two axially adjacent main support plates.

[0008] A left positioning hole is provided at the center of the right end face of the ball pin; a right positioning hole is provided at the center of the left side wall of the limiter; a left positioning head is provided at the center of the left end face of the center column to match the left positioning hole; a right positioning head is provided at the center of the right end face of the center column to match the right positioning hole.

[0009] A screw hole is provided at the center of the end face of the main support rod and the auxiliary support rod; the outer walls of the main support plate and the auxiliary support plate are provided with a groove coaxial with the screw hole; a through hole is provided at the center of the bottom of the groove and connected to the screw hole; a screw passes through the through hole and is screwed into the screw hole, and the head of the screw is pressed on the bottom of the groove.

[0010] The limiting member is provided with a plurality of weight-reducing holes evenly distributed around the circumference.

[0011] The beneficial effects of the utility model are:

[0012] Compared with the existing technology, the steering gear tie rod lightweight structure adopts the tie rod body of the utility model structure in a tubular shape, so that the tie rod body is directly transformed from a traditional solid structure into a hollow structure. The hollow structure can effectively reduce the weight of the tie rod body and achieve lightweight, and there is space inside the hollow structure. When the tie rod body is subjected to force, the internal shear stress generated is much greater than the solid structure. Compared with the solid structure, it has more advantages in bearing loads. When the tie rod body is subjected to bending force, the hollow structure is more stable. After the interaction of these two factors of reducing weight and enhancing internal shear effect, the bending impact strength of the tie rod body can be effectively improved. Even if the vehicle is driving on complex potholes and the tie rod body is impacted, it will not bend or deform.

[0013] Compared with the existing technology, the support structure of the lightweight structure of the steering gear tie rod adopting the structure of the utility model can effectively support the inner wall of the tie rod body, avoid the situation where the pressure bearing capacity is weakened due to the thin wall thickness of the tie rod body, and further avoid the situation where the tie rod is compressed and deformed. The presence of the center column can form a base at the axial center position of the tie rod body, so that the main support rod can effectively support the inner wall of the tie rod body through the main support plate, and the support structure does not completely fill the space inside the tie rod body, thereby ensuring that the tie rod body improves its own pressure bearing capacity while still being able to use its own hollow space to achieve lightweighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view of the lightweight structure of the steering gear tie rod of the utility model;

[0015] Figure 2 yes Figure 1 An enlarged view of part A;

[0016] Figure 3 It is a structural diagram of the supporting structure;

[0017] Figure 4 This is a cross-sectional view of the lightweight structure of the steering gear tie rod of the present invention when no supporting structure is provided in the tie rod body. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] See also Figures 1 to 4 The utility model provides a lightweight structure of a steering gear tie rod, comprising a ball seat 1, a ball head 2 arranged in the ball seat 1 and a ball pin 3 arranged at one end of the ball head 2, the end of the ball pin 3 is connected to a tie rod body 4, and the ball seat 1 is covered with a ball shell 5 matching it, and the tie rod body 4 is tubular; the right end of the ball pin 3 is inserted to the right into the left end port of the tie rod body 4; the outer wall of the right end of the ball pin 3 inserted into the tie rod body 4 is provided with an external thread 9, and the left end of the tie rod body 4 is fixed to the right end of the ball pin 3 by riveting; the inner wall of the right part of the tie rod body 4 is provided with an internal thread 6, and a limit member 7 is screwed into the right part of the tie rod body 4 through the internal thread 6; a support structure located in the tie rod body 4 is provided between the left side wall of the limit member 7 and the right end face of the ball pin 3, and the support structure can support the inner wall of the left part of the tie rod body 4.

[0020] The support structure includes a center column 801 arranged between the left side wall of the limit member 7 and the right end face of the ball pin; the center column 801 is provided with a number of main support rods 802 evenly distributed in a circle; the end of the main support rod 802 is provided with a main support plate 803 that fits with the inner wall of the pull rod body 4; the outer wall of the main support plate 803 is arc-shaped and fits with the inner wall of the pull rod body 4.

[0021] The outer wall of the central column 801 is provided with a number of auxiliary support rods evenly distributed in a circle; the position of the auxiliary support rod corresponds to the gap between the two axially adjacent main support rods 802; the end of the auxiliary support rod is provided with a auxiliary support plate 805; the outer wall of the auxiliary support plate 805 is arc-shaped and fits with the inner wall of the pull rod body 4; the position of the auxiliary support plate 805 corresponds to the gap between the two axially adjacent main support plates 803.

[0022] A left positioning hole 806 is provided at the center of the right end face of the ball pin 3; a right positioning hole 807 is provided at the center of the left side wall of the limiting member 7; a left positioning head 808 is provided at the center of the left end face of the middle column 801 to match the left positioning hole 806; a right positioning head 809 is provided at the center of the right end face of the middle column 801 to match the right positioning hole 807.

[0023] A screw hole 810 is provided at the center of the end face of the main support rod 802 and the auxiliary support rod; the outer walls of the main support plate 803 and the auxiliary support plate 805 are provided with a groove 811 coaxial with the screw hole; the center of the bottom of the groove 811 is provided with a through hole 812 that penetrates the screw hole 8100; a screw 813 passes through the through hole 812 and is screwed into the screw hole 810, and the head of the screw 813 is pressed on the bottom of the groove 811.

[0024] The limiting member 7 is provided with a plurality of weight-reducing holes 814 evenly distributed around the circumference.

[0025] The method of using the utility model is as follows:

[0026] When the pull rod body 4 is tubular, the pull rod body 4 is directly transformed from a traditional solid structure into a hollow structure. The hollow structure can effectively reduce the weight of the pull rod body 4 and achieve lightweight, and there is space inside the hollow structure. When the pull rod body 4 is subjected to force, the internal shear stress generated is much greater than that of the solid structure. Compared with the solid structure, it has more advantages in bearing loads. When the pull rod body 4 is subjected to bending force, the hollow structure is more stable. The interaction of these two factors of reducing weight and enhancing internal shear effect can effectively improve the bending impact strength of the pull rod body 4. Even if the vehicle is driving on complex potholes and the pull rod body is impacted, it will not bend or deform.

[0027] At the same time, the supporting structure can effectively support the inner wall of the pull rod body 4, avoid the situation where the pressure bearing capacity is weakened due to the thin wall thickness of the pull rod body 4, and further avoid the situation where the pull rod is compressed and deformed. The existence of the middle column 801 can form a base at the axial position of the pull rod body 4, so that the main support rod 802 can effectively support the inner wall of the pull rod body 4 through the main support plate 803. The supporting structure does not completely fill the space inside the pull rod body 4, thereby ensuring that the pull rod body 4 improves its own pressure bearing capacity while still being able to utilize its own hollow space to achieve lightweight. The supporting structure is only provided in the left part of the pull rod body 4, so the right part of the pull rod body 4 is still in a hollow state, and it can still reduce a lot of weight itself, further ensuring the lightweight of the pull rod, and the limit member 7 only occupies a small part of the space on the right side of the pull rod body 4, and the right end of the pull rod body 4 can be assembled with the external joint through the internal thread 6.

[0028] The outer wall of the middle column 801 is provided with a number of secondary support rods evenly distributed in a circumference. The position of the secondary support rod corresponds to the gap between the two axially adjacent main support rods 802. A secondary support plate 805 is provided at the end of the secondary support rod. The outer wall of the secondary support plate 805 is arc-shaped and fits against the inner wall of the pull rod body 4. The existence of the secondary support rod and the secondary support plate 805 can effectively increase the support area of ​​the support structure acting on the inner wall of the pull rod body 4, further improve the support effect, thereby further improving the pressure-bearing area of ​​the pull rod body 4, and the position of the secondary support plate 805 corresponds to the gap between the two axially adjacent main support plates 803. The existence of the secondary support plate 805 can effectively make up for the support gap formed by the gap between the two axially adjacent main support plates 803, so that the secondary support plate 805 and the main support plate 803 are evenly distributed in the pull rod body 4, and can evenly support the inner wall of the pull rod body 4, thereby ensuring the support effect to the greatest extent.

[0029] A left positioning hole 806 is provided at the center of the right end face of the ball pin 3, a right positioning hole 807 is provided at the center of the left side wall of the limiting member 7, a left positioning head 808 matching the left positioning hole 806 is provided at the center of the left end face of the middle column 801, and a right positioning head 809 matching the right positioning hole 807 is provided at the center of the right end face of the middle column 801. The existence of the left positioning head 808 can effectively fix the left end of the middle column 801 on the right end of the ball pin 3, and the existence of the right positioning head 809 can effectively fix the right end of the middle column 801 on the left end of the limiting member 7, effectively ensuring the stability of the middle column 801 when it is located at the axial position of the pull rod body 4, thereby ensuring the stability when the main support rod 802 supports the inner wall of the pull rod body 4 through the main support plate 803 and the auxiliary support rod supports the inner wall of the pull rod body 4 through the auxiliary support plate 805.

[0030] A screw hole 810 is provided in the center of the end face of the main support rod 802 and the auxiliary support rod, and a groove 811 is provided on the outer wall of the main support plate 803 and the auxiliary support plate 805 which is coaxial with the screw hole 810. A through hole 812 which is connected with the screw hole 810 is provided in the center of the bottom of the groove 811. A screw 813 passes through the through hole 812 and is screwed into the screw hole 810. The head of the screw 813 is pressed on the bottom of the groove 811. This fixing method facilitates the disassembly and assembly between the main support rod 802 and the main support plate 803, and between the auxiliary support rod and the auxiliary support plate 805, thereby facilitating the replacement of the main support plate 803 and the auxiliary support plate 805.

[0031] The position-limiting member 7 is provided with a plurality of weight-reducing holes 814 evenly distributed around the circumference. The existence of the weight-reducing holes 814 can effectively reduce the weight of the position-limiting member 7, further ensuring the lightweight of the pull rod.

[0032] The outer wall of the right end of the ball pin 3 inserted into the pull rod body 4 is provided with an external thread 9, and the left end of the pull rod body 4 is fixed to the right end of the ball pin 3 by riveting. During riveting, the outer wall of the pull rod body 4 can be punched and deformed toward the ball pin 3 through a special riveting tool, and the pull rod body 4 is riveted into a hexagonal shape. At this time, the inner wall of the pull rod body 4 is also squeezed and deformed into the external thread 9 of the ball pin 3, thereby ensuring the stability of the connection between the right end of the ball pin 3 and the left end of the pull rod body 4 to the greatest extent.

[0033] A rubber sleeve 10 can be set between the main support plate 803 and the middle column 801 and covered on the outside of the main support rod 802. A rubber sleeve 10 can also be set between the secondary support plate 805 and the middle column 801 and covered on the outside of the secondary support rod. The rubber sleeve 10 can buffer the pressure when the pull rod body is pulled, further ensuring the pressure-bearing effect of the pull rod body 4.

Claims

1. A lightweight steering gear tie rod structure, comprising a ball seat, a ball head disposed within the ball seat, and a ball pin disposed at one end of the ball head, wherein the end of the ball pin is connected to the tie rod body, and the ball seat is covered with a matching ball shell, characterized in that: The pull rod body is tubular; the right end of the ball pin is inserted into the port on the left end of the pull rod body to the right; the outer wall of the right end of the ball pin inserted into the pull rod body is provided with an external thread, and the left end of the pull rod body is fixed to the right end of the ball pin by riveting; the inner wall of the right part of the pull rod body is provided with an internal thread, and a limit member is screwed to the right part of the pull rod body through the internal thread; a support structure located in the pull rod body is provided between the left side wall of the limit member and the right end face of the ball pin, and the support structure can support the inner wall of the left part of the pull rod body.

2. The lightweight structure of the steering gear tie rod according to claim 1, characterized in that: The support structure includes a center column arranged between the left side wall of the limit member and the right end face of the ball pin; a number of main support rods evenly distributed around the circumference are provided outside the center column; a main support plate is provided at the end of the main support rod and fits with the inner wall of the pull rod body; the outer wall of the main support plate is arc-shaped and fits with the inner wall of the pull rod body.

3. The lightweight structure of the steering gear tie rod according to claim 2, characterized in that: The outer wall of the central column is provided with a number of auxiliary support rods evenly distributed in a circle; the position of the auxiliary support rod corresponds to the gap between two axially adjacent main support rods; a secondary support plate is provided at the end of the auxiliary support rod; the outer wall of the auxiliary support plate is arc-shaped and fits with the inner wall of the pull rod body; the position of the auxiliary support plate corresponds to the gap between two axially adjacent main support plates.

4. The lightweight structure of the steering gear tie rod according to claim 3, characterized in that: A left positioning hole is provided at the center of the right end face of the ball pin; a right positioning hole is provided at the center of the left side wall of the limiter; a left positioning head is provided at the center of the left end face of the center column to match the left positioning hole; a right positioning head is provided at the center of the right end face of the center column to match the right positioning hole.

5. The lightweight structure of the steering gear tie rod according to claim 3, characterized in that: A screw hole is provided at the center of the end face of the main support rod and the auxiliary support rod; the outer walls of the main support plate and the auxiliary support plate are provided with a groove coaxial with the screw hole; a through hole is provided at the center of the bottom of the groove and connected to the screw hole; a screw passes through the through hole and is screwed into the screw hole, and the head of the screw is pressed on the bottom of the groove.

6. The lightweight structure of the steering gear tie rod according to claim 1, characterized in that: The limiting member is provided with a plurality of weight-reducing holes evenly distributed around the circumference.

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