Steering engine tie rod of ball cage type structure
Through the cage-type steering machine cross-tie rod, the point contact design of the steel ball and the outer ball shell is adopted, the problems of excessive weight and high cost of the cross-tie rod in the prior art are solved, and lightweight and cost reduction are achieved, while improving the The output efficiency and torque control capability of the steering machine are provided.
Patent Information
- Application Number
- CN202420662272.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-02
AI Technical Summary
When the existing steering wheel crossbars meet high performance and high reliability requirements, there are problems such as excessive weight, high cost and complex design, making it difficult to effectively control torque and meet customer minimum starting torque requirements.
A cage-type steering machine tie rod was designed, using a point contact structure between the steel ball and the outer ball shell. Through interference fit and arc surface design, the structure is simplified and the parts are reduced, achieving lightweight and cost. reduce.
The weight reduction of the tie rod is achieved by at least 15%, cost reduction of at least 5%, and improved output efficiency and torque control capabilities, meeting efficient steering performance and low starting torque requirements.
Smart Images
Figure CN222179623U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steering systems, in particular to a steering machine tie rod with a ball cage structure. Background Art
[0002] With the rapid development of electric vehicles and passenger cars, the performance requirements of the steering gear of the whole vehicle are getting higher and higher. As the only output part of the steering gear, the tie rod not only provides the output of rack force, but also has higher and higher requirements for torque control and steering gear performance, service life and reliability. This innovation is committed to improving the overall performance of the tie rod by introducing a mechanical ball cage from the perspective of modifying the original structure of the tie rod. Summary of the invention
[0003] In order to overcome the deficiencies of the prior art, the utility model provides a steering gear tie rod with a ball cage structure, which helps the steering gear to improve output efficiency and meet the minimum starting torque requirements of some customers.
[0004] In order to achieve the above purpose, a steering gear tie rod with a ball cage structure is designed, including a tie rod, which is characterized in that: one end of the tie rod is sleeved with a retaining frame, the outer side of the retaining frame is sleeved with a steel ball fixing ring, and a plurality of steel balls are evenly embedded on the circumference of the steel ball fixing ring; one end of the tie rod and the outer side of the steel ball are sleeved with an outer ball shell.
[0005] One end of the tie rod is a columnar structure, and the end surface of the columnar structure is an arc surface.
[0006] The retaining frame is connected to one end of the tie rod by interference fit.
[0007] There are at least four steel balls.
[0008] The steel ball fixing ring is a circular ring structure, and a plurality of circular holes for placing steel balls are evenly distributed on the outer edge side of the steel ball fixing ring.
[0009] One end of the outer spherical shell is a cylindrical structure, and an external thread connected to the steering rack is provided at the outer edge of the cylindrical structure; the other end of the outer spherical shell is provided with a groove, the bottom of the groove is a plane, and the side wall of the groove is an arc surface.
[0010] The bottom surface of the outer spherical shell groove is in point contact with the end surface of the transverse tie rod; the arc surface of the outer spherical shell groove is in point contact with the steel ball.
[0011] Compared with the prior art, the utility model provides a steering gear tie rod with a ball cage structure, which is an ultra-light structure with balls and a retaining frame as the main body, so that the weight of the tie rod is reduced by at least 15%, and some designs and redundant parts are simplified, so that the processing cost of the tie rod is reduced by at least 5%. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the utility model.
[0013] Figure 2 This is an exploded view of the structure of the utility model.
[0014] Figure 3 It is a cross-sectional view of the structure of the utility model.
[0015] Figure 4 This is a schematic diagram of the utility model being installed in a steering system.
[0016] Figure 5 This is a schematic diagram of the structure of the cross tie rod in the utility model.
[0017] Figure 6 It is a schematic diagram of the swing of the steel ball in the utility model. DETAILED DESCRIPTION
[0018] The utility model is further described below with reference to the accompanying drawings.
[0019] like Figures 1 to 5 As shown, one end of the tie rod 1 is sleeved with a retaining frame 2, the outer side of the retaining frame 2 is sleeved with a steel ball fixing ring 4, and a plurality of steel balls 3 are evenly embedded on the circumference of the steel ball fixing ring 4; one end of the tie rod 1 and the outer side of the steel balls 3 are sleeved with an outer ball shell 5.
[0020] One end of the tie rod 1 is a columnar structure, and the end surface of the columnar structure is an arc surface.
[0021] The retaining frame 2 is connected to one end of the tie rod 1 by interference fit.
[0022] There are at least four steel balls 3.
[0023] The steel ball fixing ring 4 is a circular ring structure, and a plurality of circular holes for placing the steel balls 3 are evenly distributed on the outer edge of the steel ball fixing ring 4 .
[0024] One end of the outer spherical shell 5 is a cylindrical structure, and an external thread connected to the steering rack 6 is provided at the outer edge of the cylindrical structure; the other end of the outer spherical shell 5 is provided with a groove, the bottom of the groove is a plane, and the side wall of the groove is an arc surface.
[0025] The bottom surface of the groove of the outer spherical shell 5 is in point contact with the end surface of the tie rod 1 ; the arc surface of the groove of the outer spherical shell 5 is in point contact with the steel ball 3 .
[0026] like Figure 3As shown, the installation process of the utility model is as follows: 1. First, four steel balls 3 are assembled into the round holes on the steel ball fixing ring 4; 2. The end of the tie rod 1 and the retaining frame 2 are fixed by interference fit; 3. Finally, the assembled steel balls 3 and the retaining frame 2 are inserted into the grooves of the outer ball shell 5.
[0027] like Figure 4 As shown, the utility model is connected to the steering rack 6 through the external thread on the outer spherical shell 5. As the motor 7 outputs the power assist, the rack force is output through the tie rod 1 to achieve steering.
[0028] like Figure 6 As shown, the swing principle of the utility model:
[0029] Since the forces applied to a car during driving and turning are very complex, depending on the road conditions, modern cars are required to meet extremely demanding road conditions, such as Belgian roads and rocky roads. When the tire moves, the tie rod is connected to the tire, and when the tire bounces, the tie rod also bounces, so the damage to the parts in the ball shell is very serious.
[0030] Since the ball cage type tie rods are all point contacts, see Figure 6 As shown, the steel balls make point contact with the inner wall of the spherical shell. On the one hand, the force-bearing area of the spherical shell is greatly reduced, and the force dispersion becomes uniform. According to the weight and model of the car, the number of steel balls can be appropriately increased to increase the force load. This innovation takes four steel balls as an example, and five to six steel balls can be added according to the severity of the working conditions.
[0031] When the tie rod swings, the steel ball slides axially in the sliding groove in the ball shell. Due to the existence of the groove, the steel ball can be prevented from being misplaced. As the steel ball slides, the tie rod swings.
[0032] The swing angle α depends on the curvature of the moving groove. The curvature is modified according to the requirements of the car manufacturer to achieve the change of the swing angle. Since the contact area of the steel ball is small and the sliding efficiency is high, it can meet the efficient pull rod swing and meet the low starting torque requirements of the car manufacturer.
[0033] The swing angle β of the steel ball depends on the number and size of the steel balls. In general, α=β, so the swing amplitude can be calculated by controlling the groove and the steel ball.
[0034] The utility model removes redundant parts from the original tie rod, greatly reducing costs, which is beneficial for enterprises to reduce costs and increase efficiency; since the tie rod structure is simplified, the cutting process is optimized compared to the previous tie rod, which reduces the cost of the tie rod; the overall weight is reduced, which is beneficial for lightweight design.
Claims
1. A steering gear tie rod of a ball cage structure, comprising a tie rod, characterized in that: One end of the tie rod (1) is sleeved with a retaining frame (2), the outer side of the retaining frame (2) is sleeved with a steel ball fixing ring (4), and a plurality of steel balls (3) are evenly distributed and embedded on the circumference of the steel ball fixing ring (4); one end of the tie rod (1) and the outer side of the steel ball (3) are sleeved with an outer ball shell (5); One end of the outer spherical shell (5) is a cylindrical structure, and an external thread connected to the steering rack (6) is provided at the outer edge of the cylindrical structure; the other end of the outer spherical shell (5) is provided with a groove, the bottom of the groove is a plane, and the side wall of the groove is an arc surface; The bottom surface of the groove of the outer spherical shell (5) is in point contact with the end surface of the tie rod (1); the arc surface of the groove of the outer spherical shell (5) is in point contact with the steel ball (3).
2. The steering gear tie rod of the ball cage structure according to claim 1, characterized in that: One end of the tie rod (1) is a columnar structure, and the end surface of the columnar structure is an arc surface.
3. The steering gear tie rod of the ball cage structure according to claim 1, characterized in that: The retaining frame (2) is connected to one end of the tie rod (1) by interference fit.
4. The steering gear tie rod of the ball cage structure according to claim 1, characterized in that: There are at least four steel balls (3).
5. The steering gear tie rod of ball cage structure according to claim 1, characterized in that: The steel ball fixing ring (4) is a circular ring structure, and a plurality of circular holes for placing the steel balls (3) are evenly distributed on the outer edge side of the steel ball fixing ring (4).