High-pressure circulating ball power steering gear

Abstract

The utility model relates to the technical field of automobile steering gears, and discloses a high-pressure circulating ball power steering gear which comprises a steering shaft, a ball groove is formed in the steering shaft, a sliding piece is arranged on the outer ring of the ball groove in a sleeving mode, and one side of the outer ring of the sliding piece extends in the radial direction of the circumference to form a sliding rack. The sliding rack is meshed with semi-circular teeth on the steering auxiliary part, semi-circular plates are arranged at the upper end and the lower end, provided with the semi-circular teeth, of the steering auxiliary part through knob shafts, limiting sleeves are arranged on the end faces, extending outwards, of the semi-circular plates, and a connecting hole connected with an automobile steering rod is formed in the steering auxiliary part. According to the high-pressure circulating ball power steering gear, the semicircular plate is matched with the limiting sleeve for use, so that the device can limit the sliding rack and the semicircular teeth, when the sliding rack and the semicircular teeth are in meshing transmission, the sliding rack and the semicircular teeth do not shake up and down, the complexity of the device is simplified, and the overall manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile steering gears, in particular to a high-pressure circulating ball power steering gear. Background Art

[0002] The electric steering system of automobiles is an important development direction of the steering system of modern automobiles. Compared with the traditional hydraulic power steering system, it has more advantages. First of all, the electric steering system directly provides steering assistance by the electric motor, which means that a series of components such as the power steering oil pump, hose, hydraulic oil, conveyor belt and pulley installed on the engine required by the hydraulic power steering system are eliminated. This not only greatly saves energy and reduces energy consumption, but also effectively protects the environment and reduces emissions, which is in line with the current global trend of green and environmental protection. The adjustment of the electric steering system is simpler and the device is more flexible. Due to its relatively simple structure, there is no restriction on the complex pipelines and hydraulic pressure of the hydraulic system, which makes the electric steering system respond more quickly and the size of the steering assistance can be precisely adjusted as needed. This flexibility enables the electric steering system to provide different steering assistance under different working conditions to meet various driving needs. At present, there are three common electric steering methods: column power-assisted, gear power-assisted and rack power-assisted. These three methods have their own characteristics and are suitable for different models and working conditions. For example, the column power-assisted electric steering system is mainly used in large vehicles, and its advantages are compact structure and small space occupation. The rack-assisted electric steering system is more suitable for vehicles that require greater steering assistance, such as high-performance cars and sports cars. According to different loads and operating conditions, the appropriate layout can be selected. For example, for heavy vehicles, due to their large loads, the demand for steering assistance is also greater, so the motor can be arranged on the steering column to improve the efficiency and stability of the system. For light vehicles, due to their small demand for steering assistance, the motor can be arranged on the gear or rack to further reduce the volume and weight of the system. In the future, with the continuous advancement of technology and in-depth research, automotive electric steering systems are expected to achieve more functions and features. For example, by introducing more advanced sensors and control systems, adaptive steering assistance control can be achieved to further improve driving safety and comfort. At the same time, with the popularization and development of electric vehicles, the importance of electric steering systems will become more prominent. It can provide electric vehicles with better handling performance and stability, and help solve the handling problems that electric vehicles may encounter during driving. The application of electric steering systems will also promote the sustainable development of the automotive industry. With the improvement of environmental awareness and the need for energy conservation and emission reduction, more and more automakers are beginning to pay attention to the environmental performance of automobiles. The widespread application of electric steering systems will help reduce environmental pollution and energy consumption, and promote the automotive industry to a greener and more environmentally friendly development path. The automotive electric steering system has broad application prospects and development space. With the continuous advancement of technology and in-depth research, we have reason to believe that the electric steering system will play an increasingly important role in the future automotive industry, bringing people a safer, more comfortable and environmentally friendly driving experience.

[0003] In the prior art, recirculating ball power steering gears are widely used in the field of automobile steering due to their relatively excellent performance. When the recirculating ball power steering gear is performing steering control, since the steering head and the sliding sleeve are directly meshed and transmitted through gears or other transmission structures, there is no external force constraint at the upper and lower ends. When rotating, the meshing teeth may shake up and down or even disengage due to the vibration of the vehicle body. In general traditional structures, the two components often need to be separately constrained by other fixing devices, which makes the overall structure more complicated. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a high-pressure circulating ball power steering gear, which can constrain the meshing teeth of the steering gear to prevent the meshing teeth from shaking with each other, thereby solving the problem of shaking or even separation between the meshing teeth that may occur when the car shakes.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of constraining the meshing teeth of the steering gear and preventing the meshing teeth from shaking against each other, the utility model provides the following technical solutions: a high-pressure circulating ball power steering gear, comprising a steering shaft, a ball groove is arranged on the steering shaft, a sliding member is arranged on the outer ring of the ball groove, the sliding member is arranged on a central inner cavity, the central inner cavity is arranged on the ball groove, the ball groove arranged in the central inner cavity of the sliding member and the ball groove arranged on the steering shaft cooperate with each other to form a ball circulation channel, circulating balls are arranged in the ball circulation channel, a sliding rack extends in the radial direction of the circumference on one side of the outer ring of the sliding member, the sliding rack is meshed with the semicircular teeth on the steering assist member, the steering assist member is provided with semicircular plates at the upper and lower ends of the semicircular teeth through the knob shaft, a limiting sleeve is arranged on the end face of the semicircular plate extending outward, and a connecting hole connected to the steering rod of a car is arranged on the steering assist member.

[0008] Preferably, a connecting thread is provided in the connecting hole.

[0009] Preferably, the length of the limiting sleeve is greater than the length of the sliding member.

[0010] Preferably, a universal connector is provided at one end of the steering shaft, and a fixing head is provided at the other end.

[0011] Preferably, the inner ring diameter of the limiting sleeve is larger than the outer ring diameter of the sliding member.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a high-pressure circulating ball power steering gear, which has the following beneficial effects:

[0014] 1. The high-pressure circulating ball power steering gear effectively limits the range of motion of the sliding rack and the semicircular teeth through the use of a semicircular plate and a limiting sleeve. The design of the semicircular plate can perfectly fit the sliding rack and the semicircular teeth, while the limiting sleeve can limit the movement of the semicircular plate, thereby realizing the precise positioning of the two components. This limiting method can avoid the upper line shaking of the sliding rack and the semicircular teeth during the meshing transmission process, thereby improving the stability and reliability of the transmission. It can avoid the reduction of the meshing degree between the sliding rack and the semicircular teeth due to the violent shaking of the vehicle. During the driving process of the vehicle, due to the complex and changeable road conditions, the vehicle may experience bumps, vibrations, etc. If the meshing degree between the sliding rack and the semicircular teeth is not stable enough, it is easy to cause meshing failure, affecting the vehicle's handling performance and driving safety. The limiting design of the high-pressure circulating ball power steering gear can effectively avoid this situation and ensure that the vehicle can drive stably and safely under any road conditions. There is no need to constrain the sliding rack and the semicircular teeth separately through other limiting parts. The traditional limiting method usually requires setting limiting mechanisms for the two parts separately, which not only increases the complexity of the device, but also increases the manufacturing cost. However, the limiting design of the high-pressure circulating ball power steering gear only requires the cooperation of a semicircular plate and a limiting sleeve to achieve accurate limiting of the two parts, simplifying the structure of the device and reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the high-pressure circulating ball power steering gear in the utility model;

[0016] Figure 2 It is a front view of the high-pressure circulating ball power steering gear in the utility model;

[0017] Figure 3 It is a schematic diagram of the transmission of the sliding rack and the semicircular teeth meshing in the high-pressure circulating ball power steering structure of the utility model;

[0018] Figure 4 The utility model is a schematic diagram of the three-dimensional structure of the high-pressure circulating ball power steering gear limit sleeve and the steering auxiliary component.

[0019] In the figure: 1-steering shaft, 2-ball groove, 3-sliding member, 4-sliding rack, 5-semicircular teeth, 6-knob shaft, 7-semicircular plate, 8-limiting sleeve, 9-steering auxiliary member, 10-connecting hole, 11-universal connector, 12-fixed head. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 A high-pressure circulating ball power steering gear comprises a steering shaft 1, a ball groove 2 is arranged on the steering shaft 1, a sliding member 3 is arranged on the outer ring of the ball groove 2, the sliding member 3 is arranged with a central inner cavity, the central inner cavity is arranged with the ball groove 2, the ball groove 2 arranged through the central inner cavity of the sliding member 3 and the ball groove 2 arranged on the steering shaft 1 cooperate with each other to form a ball circulation channel, circulating balls are arranged in the ball circulation channel, a sliding rack 4 is extended in the radial direction of the circumference on one side of the outer ring of the sliding member 3, the sliding rack 4 is meshed with the semicircular teeth 5 on the steering assist member 9, the steering assist member 9 is provided with a semicircular plate 7 at the upper and lower ends of the semicircular teeth 5 through a knob shaft 6, a limiting sleeve 8 is arranged on the end face of the semicircular plate 7 extending outward, and a connecting hole 10 connected to the steering rod of the automobile is arranged on the steering assist member 9.

[0022] The high-pressure circulating ball power steering gear achieves the limitation of the sliding rack 4 and the semicircular teeth 5 by setting the limiting sleeve 8, thereby improving the safety and stability of vehicle driving. First, a ball groove 2 is provided on the steering shaft 1, and a sliding member 3 is provided on the outer ring of the ball groove 2. The sliding member 3 is provided with a central inner cavity, and the central inner cavity is provided with a ball groove 2. The ball groove 2 provided in the central inner cavity of the sliding member 3 and the ball groove 2 provided on the steering shaft 1 cooperate with each other to form a ball circulation channel. Circulating balls are provided in the ball circulation channel. These circulating balls can play a supporting and force transmission role between the sliding rack 4 and the steering shaft 1, thereby improving the stability and reliability of the steering gear. Secondly, a sliding rack 4 is extended in the circumferential radial direction on one side of the outer ring of the sliding member 3. The sliding rack 4 is meshed with the semicircular teeth 5 on the steering auxiliary member 9. This meshing design enables the sliding rack 4 to drive the steering auxiliary member 9 to rotate together when rotating, thereby realizing the steering operation. In addition, the steering assist component 9 is provided with a semicircular plate 7 at the upper and lower ends of the semicircular teeth 5 through the knob shaft 6. The end surface of the semicircular plate 7 extending outward is provided with a limit sleeve 8. The limit sleeve 8 can limit the movement range of the sliding rack 4 and the semicircular teeth 5 to prevent them from shaking or disengaging during the meshing transmission process. Finally, the steering assist component 9 is provided with a connecting hole 10 connected to the steering rod of the car. Through the connecting hole 10, the steering assist component 9 can be connected to the steering rod of the car to form a complete steering system.

[0023] When the driver turns the steering wheel, the steering shaft 1 is driven to rotate through the universal joint 11, driving the sliding member 3 and the circulating ball to rotate together. The sliding rack 4 and the semicircular teeth 5 are meshed with each other, transmitting the torque to the steering auxiliary member 9. At the same time, the limit sleeve 8 limits the movement range of the sliding rack 4 and the semicircular teeth 5 to ensure the stability and reliability of the transmission. Through the connecting hole 10, the steering auxiliary member 9 transmits the torque to the car steering rod, and finally drives the wheel to turn.

[0024] The connection hole 10 is provided with a connection thread. The length of the limit sleeve 8 is greater than the length of the sliding member 3. The steering shaft 1 is provided with a universal joint 11 at one end and a fixed head 12 at the other end. The inner diameter of the limit sleeve 8 is greater than the outer diameter of the sliding member 3.

[0025] The connection hole 10 is provided with a connection thread, so that the connection between the steering assist part 9 and the steering rod of the automobile is more firm and stable. By tightening the connection thread, the torque transmission of the steering system can be ensured to be more reliable, thereby improving the handling performance and driving safety of the vehicle. The length of the limit sleeve 8 is greater than the length of the sliding member 3, so as to better limit the sliding rack 4 and the semicircular tooth 5. The increase in length enables the limit sleeve 8 to better adapt to the driving state of the vehicle under different road conditions, ensuring the stability and reliability of the transmission. A universal connector 11 is provided at one end of the steering shaft 1, and a fixed head 12 is provided at the other end. This design enables the steering shaft 1 to adapt to different steering angles and torque transmission requirements. The universal connector 11 can ensure that the steering shaft 1 remains stable during the rotation process, and the fixed head 12 can be used to fix the steering shaft 1 on the automobile structure, improving the stability of the entire steering system. The inner diameter of the limit sleeve 8 is greater than the outer diameter of the sliding member 3, so that the limit sleeve 8 can better limit the range of motion of the sliding rack 4 during the meshing transmission process of the sliding rack 4 and the semicircular tooth 5. The difference in diameter creates a certain preload, which helps to improve the tightness and stability of the meshing, and further prevents shaking or tooth stripping.

[0026] Working principle: Through the use of the semicircular plate 7 in conjunction with the limiting sleeve 8, the device can limit the sliding rack 4 and the semicircular tooth 5, so that the two will not shake up and down when they are meshing and transmitting. When the sliding member 3 moves, a part of it is always in the limiting sleeve 8. The semicircular plate 7 can well limit the sliding rack 4 and the semicircular tooth 5 to the same plane, ensuring the accuracy of transmission and the completeness of meshing. It can avoid the reduction of the meshing degree between the sliding rack 4 and the semicircular tooth 5 due to the violent shaking of the vehicle, improve the user's safety, and at the same time, there is no need to constrain the two parts separately through other limiting parts, which simplifies the complexity of the device and reduces the production cost.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure circulating ball power steering gear, comprising a steering shaft (1), wherein a ball groove (2) is arranged on the steering shaft (1), wherein a sliding member (3) is arranged on the outer ring of the ball groove (2), wherein the sliding member (3) is arranged with a central inner cavity, wherein the central inner cavity is arranged with the ball groove (2), wherein the ball groove (2) arranged in the central inner cavity of the sliding member (3) and the ball groove (2) arranged on the steering shaft (1) cooperate with each other to form a ball circulation channel, wherein circulating balls are arranged in the ball circulation channel, wherein: A sliding rack (4) extends from one side of the outer ring of the sliding member (3) in the circumferential radial direction, and the sliding rack (4) is meshed with a semicircular tooth (5) on a steering assist member (9). The steering assist member (9) is provided with a semicircular plate (7) at the upper and lower ends of the semicircular tooth (5) through a knob shaft (6), and a limit sleeve (8) is provided on the end surface of the semicircular plate (7) extending outward, and a connecting hole (10) connected to a steering rod of an automobile is provided on the steering assist member (9).

2. The high pressure circulating ball power steering gear according to claim 1, characterized in that: A connecting thread is provided in the connecting hole (10).

3. The high pressure circulating ball power steering gear according to claim 1, characterized in that: The length of the limiting sleeve (8) is greater than the length of the sliding member (3).

4. The high pressure circulating ball power steering gear according to claim 1, characterized in that: One end of the steering shaft (1) is provided with a universal connector (11), and the other end is provided with a fixing head (12).

5. The high pressure circulating ball power steering gear according to claim 1, characterized in that: The inner ring diameter of the limiting sleeve (8) is larger than the outer ring diameter of the sliding member (3).

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