Rear wheel steering trapezoidal thread lead screw pair
By adopting 30° angle trapezoidal threaded teeth and nitriding treatment technology in the rear wheel steering threaded screw pair, the problems of low transmission efficiency, high manufacturing difficulty and high cost are solved, efficient and low-cost transmission performance is achieved, and wear resistance and service life are improved.
Patent Information
- Application Number
- CN202422079463.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The existing rear-wheel steering threaded screw pair has low transmission efficiency, is difficult to manufacture and high cost. Although the heat treatment method improves surface strength, it affects the internal structure of the material and reduces toughness and fatigue strength.
The 30° angle trapezoidal threaded tooth design is adopted to improve thread roughness through grinding process, combine nitriding to improve surface strength, and optimize the overall design to reduce manufacturing difficulty and cost.
It improves transmission efficiency, reduces manufacturing difficulty and cost, and at the same time improves wear resistance and service life, reduces noise pollution, and improves the comfort of the driving environment.
Smart Images
Figure CN222864021U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile accessories and relates to a rear wheel steering accessory, in particular to a rear wheel steering trapezoidal thread screw pair. Background Art
[0002] In the field of mechanical transmission, threaded screw pair is a common transmission component, widely used in various mechanical equipment. At present, the performance of rear wheel steering threaded screw pair, such as transmission efficiency, wear resistance and noise control, directly affects the performance and service life of the automobile steering system.
[0003] How to improve the performance of the rear wheel steering threaded screw pair has always been an important research direction. The existing rear wheel steering threaded screw pair improves its performance through structural design and material selection: the existing rear wheel steering threaded screw pair adopts a 60° trapezoidal thread structure, and improves the surface strength of the screw through heat treatment methods such as quenching and tempering. However, during use, it was found that the transmission efficiency of the 60° trapezoidal thread structure is relatively low, and the manufacturing difficulty and cost are relatively high. Secondly, although the existing heat treatment method can improve the surface strength of the screw, it often changes the internal structure of the material, affecting its toughness and fatigue strength. Summary of the invention
[0004] The utility model aims to solve the above problems existing in the prior art and provides a rear wheel steering trapezoidal thread screw pair with high transmission efficiency and low cost.
[0005] The purpose of the utility model can be achieved through the following technical solutions: a rear wheel steering trapezoidal thread screw pair, including a rod body, both sides of the outside of the rod body are provided with screw teeth, the bottom of the outside of the rod body is provided with a positioning screw hole, the top of the outside of the rod body is penetrated with a T-shaped hole, one side of the outside of the rod body is provided with a 30° angle trapezoidal thread tooth, and the external thread sleeve of the 30° angle trapezoidal thread tooth is provided with a nut.
[0006] This rear wheel steering trapezoidal thread screw pair adopts 30° trapezoidal thread teeth. This special angle design can effectively improve the transmission efficiency. Compared with the traditional right-angle trapezoidal thread or 60° trapezoidal thread structure, the 30° trapezoidal thread teeth can reduce the energy loss in the transmission process, thereby improving the transmission efficiency. The 30° trapezoidal thread teeth are finely processed using a grinding process, which can make the thread roughness reach Ra0.6. Such precision can greatly reduce friction, thereby further improving the transmission efficiency, while reducing transmission noise and improving the comfort of the driver.
[0007] The rear wheel steering trapezoidal thread screw pair optimizes the overall design of the trapezoidal thread screw pair. By improving the structural design, the manufacturing difficulty and cost can be effectively reduced, and the problem of reduced wear resistance due to excessive optimization is also avoided. While improving the performance of the trapezoidal thread screw pair, the impact on the environment is also considered. By reducing the transmission noise, noise pollution can be effectively reduced and the comfort of the driving environment can be improved.
[0008] In the above-mentioned rear wheel steering trapezoidal thread screw pair, the outer surface of the 30° angle trapezoidal thread teeth is nitrided. By nitriding the surface of the 30° angle trapezoidal thread teeth, its surface strength can be significantly improved, thereby improving the wear resistance of the parts. Compared with traditional heat treatment methods such as quenching and tempering, nitriding can significantly improve the surface hardness and wear resistance of the material without changing the internal structure of the material, thereby extending the service life of the parts.
[0009] In the above-mentioned rear wheel steering trapezoidal thread screw pair, both sides of the rod body are connected with a polished rod, and the outer part of the polished rod is sleeved with a supporting component. The cooperation of the polished rod and the supporting component can provide support for the rod body.
[0010] In the above-mentioned rear wheel steering trapezoidal thread screw pair, the support component includes a support plate, a support hole is formed through the support plate, the inner wall of the support hole is movably connected to the outside of the light rod through a bearing, and a rotation hole is formed at the center of the bottom of the support plate. The end of the light rod can be received through the support hole.
[0011] In the above-mentioned rear wheel steering trapezoidal thread screw pair, a plurality of positioning holes are provided at the bottom of the support plate and outside the rotating hole, a rotating rod is movably connected to the inner wall of the rotating hole through a bearing, a positioning plate is connected to the bottom of the rotating rod, and mounting holes are provided through the four corners of the top of the positioning plate. Through the cooperation between the positioning plate and the mounting holes, the trapezoidal thread screw pair can be conveniently installed by using bolts to penetrate the positioning plate.
[0012] In the above-mentioned rear wheel steering trapezoidal threaded screw pair, the external thread sleeve of the rotating rod is provided with a lifting plate, the top of the lifting plate is connected with a plurality of positioning rods used in conjunction with the positioning holes, the outside of the rotating rod is connected with a plurality of clamping blocks, the inner wall of the lifting plate is provided with a plurality of clamping grooves used in conjunction with the clamping blocks, the bottom sleeve of the outside of the rotating rod is provided with a reset spring, the top of the reset spring is connected to the lifting plate, and the bottom of the reset spring is connected to the positioning plate. The lifting plate can be positioned by the cooperation of the positioning rod and the positioning hole.
[0013] Compared with the prior art, the rear wheel steering trapezoidal thread screw pair uses 30° trapezoidal thread teeth. This special angle design can effectively improve the transmission efficiency. Compared with the traditional right-angle trapezoidal thread, the 30° trapezoidal thread teeth can reduce the energy loss in the transmission process, thereby improving the transmission efficiency. The 30° trapezoidal thread teeth are further fine-processed using a grinding process, which can make the thread roughness reach Ra0.6. Such precision can greatly reduce friction, thereby further improving the transmission efficiency, while reducing transmission noise and improving the comfort of the driver. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 .
[0015] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 .
[0016] Figure 3 This is a schematic diagram of the structure of the utility model Figure 3 .
[0017] Figure 4 This is a schematic diagram of the structure of the utility model Figure 4 .
[0018] Figure 5 This is a schematic diagram of the structure of the utility model Figure 5 .
[0019] Figure 6 This is an axonometric diagram of the support component structure of the utility model.
[0020] Figure 7 This is a bottom view of the support plate structure of the utility model.
[0021] Figure 8 This is the axonometric drawing of the positioning plate structure of the utility model.
[0022] In the figure: 1. Support component; 11. Support plate; 12. Support hole; 13. Positioning plate; 14. Rotation hole; 15. Positioning hole; 16. Lifting plate; 17. Rotating rod; 18. Positioning rod; 19. Reset spring; 110. Block; 2. Screw thread; 3. Rod body; 4. Nut; 5. Polish rod; 6. T-hole; 7. Positioning screw hole; 8. 30° trapezoidal thread thread. DETAILED DESCRIPTION
[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0024] like Figure 1 , Figure 2 , Figure 3, Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the rear wheel steering trapezoidal thread screw pair includes a rod body 3, both sides of the outside of the rod body 3 are provided with screw teeth 2, the bottom of the outside of the rod body 3 is provided with a positioning screw hole 7, the top of the outside of the rod body 3 is penetrated with a T-shaped hole 6, one side of the outside of the rod body 3 is provided with a 30° trapezoidal thread tooth 8, and the external thread sleeve of the 30° trapezoidal thread tooth 8 is provided with a nut 4.
[0025] During actual manufacturing, the outer surface of the 30° trapezoidal thread teeth 8 is nitrided.
[0026] During actual manufacturing, both sides of the rod body 3 are connected with a polished rod 5 , and the outer portion of the polished rod 5 is sleeved with a supporting component 1 .
[0027] In actual manufacturing, the support component 1 includes a support plate 11 , a support hole 12 is formed through the support plate 11 , the inner wall of the support hole 12 is movably connected to the outside of the light rod 5 through a bearing, and a rotation hole 14 is formed at the center of the bottom of the support plate 11 .
[0028] During actual manufacturing, a plurality of positioning holes 15 are provided at the bottom of the support plate 11 and outside the rotating hole 14. The inner wall of the rotating hole 14 is movably connected to a rotating rod 17 through a bearing. The bottom of the rotating rod 17 is connected to the positioning plate 13. The four corners of the top of the positioning plate 13 are penetrated by mounting holes.
[0029] During actual manufacturing, the external threaded sleeve of the rotating rod 17 is provided with a lifting plate 16, the top of the lifting plate 16 is connected with a plurality of positioning rods 18 used in conjunction with the positioning holes 15, the outside of the rotating rod 17 is connected with a plurality of clamping blocks 110, the inner wall of the lifting plate 16 is provided with a plurality of clamping grooves used in conjunction with the clamping blocks 110, the bottom of the outside of the rotating rod 17 is provided with a reset spring 19, the top of the reset spring 19 is connected to the lifting plate 16, and the bottom of the reset spring 19 is connected to the positioning plate 13.
[0030] Implementation column 1:
[0031] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the rear wheel steering trapezoidal thread screw pair includes a rod body 3, both sides of the outside of the rod body 3 are provided with screw teeth 2, the bottom of the outside of the rod body 3 is provided with a positioning screw hole 7, the top of the outside of the rod body 3 is penetrated with a T-shaped hole 6, one side of the outside of the rod body 3 is provided with a 30° trapezoidal thread tooth 8, and the external thread sleeve of the 30° trapezoidal thread tooth 8 is provided with a nut 4.
[0032] During actual manufacturing, the outer surface of the 30° trapezoidal thread teeth 8 is nitrided.
[0033] Implementation column 2:
[0034] Please refer to the figure Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the rear wheel steering trapezoidal thread screw pair includes a rod body 3, both sides of the outside of the rod body 3 are provided with screw teeth 2, the bottom of the outside of the rod body 3 is provided with a positioning screw hole 7, the top of the outside of the rod body 3 is penetrated with a T-shaped hole 6, one side of the outside of the rod body 3 is provided with a 30° trapezoidal thread tooth 8, and the external thread sleeve of the 30° trapezoidal thread tooth 8 is provided with a nut 4.
[0035] During actual manufacturing, both sides of the rod body 3 are connected with a polished rod 5 , and the outer portion of the polished rod 5 is sleeved with a supporting component 1 .
[0036] In actual manufacturing, the support component 1 includes a support plate 11 , a support hole 12 is formed through the support plate 11 , the inner wall of the support hole 12 is movably connected to the outside of the light rod 5 through a bearing, and a rotation hole 14 is formed at the center of the bottom of the support plate 11 .
[0037] During actual manufacturing, a plurality of positioning holes 15 are provided at the bottom of the support plate 11 and outside the rotating hole 14. The inner wall of the rotating hole 14 is movably connected to a rotating rod 17 through a bearing. The bottom of the rotating rod 17 is connected to the positioning plate 13. The four corners of the top of the positioning plate 13 are penetrated by mounting holes.
[0038] During actual manufacturing, the external threaded sleeve of the rotating rod 17 is provided with a lifting plate 16, the top of the lifting plate 16 is connected with a plurality of positioning rods 18 used in conjunction with the positioning holes 15, the outside of the rotating rod 17 is connected with a plurality of clamping blocks 110, the inner wall of the lifting plate 16 is provided with a plurality of clamping grooves used in conjunction with the clamping blocks 110, the bottom of the outside of the rotating rod 17 is provided with a reset spring 19, the top of the reset spring 19 is connected to the lifting plate 16, and the bottom of the reset spring 19 is connected to the positioning plate 13.
[0039] When the utility model is in use, by adopting a 30° angle trapezoidal thread tooth 8, this special angle design can effectively improve the transmission efficiency. Compared with the traditional right-angle trapezoidal thread or 60° angle trapezoidal thread structure, the 30° angle trapezoidal thread tooth 8 can reduce the energy loss in the transmission process, thereby improving the transmission efficiency. The 30° angle trapezoidal thread tooth 8 is finely processed by a grinding process, which can make the thread roughness reach Ra0.6. Such precision can greatly reduce friction, thereby further improving the transmission efficiency, while reducing transmission noise and improving the comfort of the driver. When the positioning plate 13 is misaligned with the mounting plate during installation, the lifting plate 16 is pressed downward to make the card slot disengage from the card block 110. At this time, the positioning plate 13 is rotated, and it can rotate with the cooperation of the rotating rod 17. After rotating to a suitable position, stop pressing the lifting plate 16, and the reset spring 19 resets the lifting plate 16 to make the lifting slot of the lifting plate 16 again sleeved on the outside of the card block 110. At the same time, the positioning rod 18 enters the interior of the positioning hole 15 to complete the positioning of the positioning plate 13, meeting the installation requirements under different environments. Furthermore, the actual length of the polished rod 5 can be adjusted according to specific usage requirements, thereby increasing the installation and usage range of the trapezoidal thread lead screw pair.
[0040] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.
Claims
1. A rear wheel steering trapezoidal thread screw pair, comprising a rod body (3), characterized in that: The rod body (3) is provided with screw threads (2) on both sides of its exterior, a positioning screw hole (7) is provided at the bottom of its exterior, a T-shaped hole (6) is provided through the top of its exterior, a 30° trapezoidal thread thread (8) is provided on one side of its exterior, and a nut (4) is provided on the external thread sleeve of the 30° trapezoidal thread thread (8).
2. The rear wheel steering trapezoidal thread screw pair according to claim 1, characterized in that: The outer surface of the 30° trapezoidal thread (8) is nitrided.
3. The rear wheel steering trapezoidal thread screw pair according to claim 1, characterized in that: Both sides of the rod body (3) are connected to a polished rod (5), and a support component (1) is sleeved on the outside of the polished rod (5).
4. The rear wheel steering trapezoidal thread screw pair according to claim 3, characterized in that: The support component (1) comprises a support plate (11), a support hole (12) is formed through the support plate (11), an inner wall of the support hole (12) is movably connected to the outside of the light rod (5) via a bearing, and a rotation hole (14) is formed at the center of the bottom of the support plate (11).
5. The rear wheel steering trapezoidal thread screw pair according to claim 4, characterized in that: A plurality of positioning holes (15) are provided at the bottom of the support plate (11) and outside the rotating hole (14); a rotating rod (17) is movably connected to the inner wall of the rotating hole (14) via a bearing; the bottom of the rotating rod (17) is connected to the positioning plate (13); and mounting holes are provided at the four corners of the top of the positioning plate (13).
6. The rear wheel steering trapezoidal thread screw pair according to claim 5, characterized in that: The external thread sleeve of the rotating rod (17) is provided with a lifting plate (16), the top of the lifting plate (16) is connected with a plurality of positioning rods (18) used in conjunction with the positioning holes (15), the outside of the rotating rod (17) is connected with a plurality of clamping blocks (110), the inner wall of the lifting plate (16) is provided with a plurality of clamping grooves used in conjunction with the clamping blocks (110), the bottom of the outside of the rotating rod (17) is provided with a return spring (19), the top of the return spring (19) is connected to the lifting plate (16), and the bottom of the return spring (19) is connected to the positioning plate (13).