Open slot structure of steering gear

Abstract

The utility model discloses an open slot structure of a steering gear, which comprises an open slot body and a gear, the open slot body comprises four surfaces, namely a slot surface, a slot surface, a slot surface and a slot surface, and the gear is rotatably connected with the open slot body. A steering gear of an existing electronic type power-assisted steering gear is prone to breakage and deformation when being impacted, and therefore the steering gear loses efficacy. According to the open slot structure of the steering gear provided by the scheme of the utility model, the four slot surfaces are matched with the automobile input shaft, torque is transmitted through two slot surfaces (1A and 1C) in the four surfaces when the input shaft rotates, and torque is transmitted through the other two slot surfaces (1B and 1D) when the input shaft rotates in a reversing manner, and the gear is driven to rotate; according to the scheme, the width and the height of the open groove are increased, the actual contact width of the open groove and the input shaft reaches 4 mm, the strength of the open groove is high and superior to that of the prior art, and the open groove is not prone to breakage and deformation when being impacted and not prone to abrasion in the long-term use process; and steering failure caused by groove breakage after impact is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic power-assisted automobile steering gears, and in particular relates to an opening slot structure of a steering gear. Background Art

[0002] The steering power of the car is divided into hydraulic steering power and electronic power. The basic structure of the hydraulic power steering gear is still the rack, but the valve body is installed on the steering column. When you turn the handle, the valve body will sense your action, control the direction of the hydraulic oil and drive the hydraulic cylinder to push the steering machine. Therefore, compared with turning the handle, the basic principle is that the hydraulic pump drives the hydraulic actuator to achieve assistance, which is similar to the principle of the jack. Since the hydraulic pump consumes part of the engine's power, the fuel consumption will also increase slightly. The control of the hydraulic system is very complicated. To achieve special functions, the cost is high and the system is complex. For example, with variable speed assistance, the hydraulic system requires a more complex solution, the cost is high, and the system stability is reduced, but the hydraulic auxiliary system has good feedback and a clear sense of the road.

[0003] The electronic power steering system has many advantages, such as simple layout, high controllability, energy saving, and the ability to realize multiple functions that the hydraulic power steering system cannot realize. For electronic steering assistance, the auxiliary source is an electric motor, which is installed on the rack steering device. Like the hydraulic assistance method, the torque sensor on the steering column can replace the hydraulic valve body to sense the driver's intention. The ECU compares and calculates multiple signals, outputs a current to drive the motor, and realizes the steering assistance function through the rotation of the motor. The electric power steering has a compact structure, a simple layout, and energy saving. It will not bring additional load to the engine. At the same time, the motor has high controllability, quick response, and variable steering assistance torque. Therefore, the steering assistance torque and control mode can be changed according to different vehicle models. The steering gear of the existing electronic power steering is easy to break and deform when impacted, which leads to steering gear failure.

[0004] Therefore, the utility model provides an open slot structure of a steering gear to improve the technical problems existing in the above-mentioned background technology. Utility Model Content

[0005] In view of the problems raised by the above background technology, the purpose of the utility model is to provide an open slot structure of a steering gear.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] An open slot structure of a steering gear comprises an open slot body and a gear, wherein the open slot body comprises four surfaces, namely a first slot surface, a second slot surface, a third slot surface and a fourth slot surface, and the gear is rotatably connected to the open slot body.

[0008] It is further defined that the first groove surface, the second groove surface, the third groove surface and the fourth groove surface respectively form an angle of 15° with the center line of the open groove body.

[0009] It is further defined that the angle between the first groove surface and the second groove surface is 30°, and the angle between the third groove surface and the fourth groove surface is 30°.

[0010] It is further defined that the widths of the first groove surface, the second groove surface, the third groove surface and the fourth groove surface are all 8 mm, and the heights are all 4 mm.

[0011] It is further defined that it also includes a notch chamfer, and the notch chamfer is arranged at the bottom of the opening slot body.

[0012] It is further defined that the diameter of the open slot body is 28.2 mm, and the diameter of the gear is 23.95 mm.

[0013] Beneficial effects of the utility model:

[0014] The steering gear of the existing electronic power steering device is easy to break and deform when impacted, thus causing the steering gear to fail. The solution of the utility model provides an open groove structure of a steering gear, wherein four groove surfaces cooperate with the input shaft of the automobile, and when the input shaft rotates, torque is transmitted through two groove surfaces (1A and 1C) of the four surfaces, and when the rotation is reversed, the other two groove surfaces (1B and 1D) transmit torque and drive the rotation of the gear.

[0015] This solution also increases the width and height of the open groove, so that the actual contact width between the open groove and the input shaft reaches 4mm. It has high strength and is suitable for double-pinion electronic power steering machines. It is superior to the existing technology and is not easy to break or deform when impacted, making it less prone to wear during long-term use; it avoids steering failure due to groove breakage after impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 It is a front view of an embodiment of an open slot structure of a steering gear of the utility model;

[0018] Figure 2 It is a side view of an embodiment of an open slot structure of a steering gear of the utility model;

[0019] Figure 3 This is a Z-direction view of an embodiment of an open slot structure of a steering gear of the utility model;

[0020] The main component symbols are explained as follows: first groove surface 1A, second groove surface 1B, third groove surface 1C, fourth groove surface 1D, open groove body 2, gear 3, groove chamfer 4. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The technical solution in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model. It should be understood that the specific embodiments described here are only used to explain the present utility model and are not used to limit the present utility model.

[0024] like Figure 1-Figure 3 As shown, an open slot structure of a steering gear of the utility model includes an open slot body 2 and a gear 3, wherein the open slot body 2 includes four surfaces, namely a first slot surface 1A, a second slot surface 1B, a third slot surface 1C and a fourth slot surface 1D, and the gear 3 and the open slot body 2 are rotatably connected.

[0025] Preferably, the first groove surface 1A, the second groove surface 1B, the third groove surface 1C and the fourth groove surface 1D respectively form an angle of 15° with the center line of the open groove body 2.

[0026] Preferably, the angle between the first groove surface 1A and the second groove surface 1B is 30°, and the angle between the third groove surface 1C and the fourth groove surface 1D is 30°.

[0027] Preferably, the widths of the first groove surface 1A, the second groove surface 1B, the third groove surface 1C and the fourth groove surface 1D are all 8 mm and 4 mm, respectively.

[0028] Preferably, it also includes a notch chamfer 4, and the notch chamfer 4 is arranged at the bottom of the opening slot body 2.

[0029] Preferably, the diameter of the open slot body 2 is 28.2 mm, and the diameter of the gear 3 is 23.95 mm.

[0030] The working principle of this embodiment is as follows:

[0031] The solution of the utility model provides an open groove structure of a steering gear, wherein four groove surfaces (a first groove surface 1A, a second groove surface 1B, a third groove surface 1C and a fourth groove surface 1D) cooperate with the input shaft of the automobile, and when the input shaft rotates, torque is transmitted through two groove surfaces (1A and 1C) among the four surfaces, and when the rotation is reversed, the other two groove surfaces (1B and 1D) transmit torque and drive the rotation of the gear 3.

[0032] This solution also increases the width and height of the open slot body 2, so that the actual contact width between the open slot body 2 and the input shaft reaches 4mm, and its strength is high. This solution is suitable for double pinion electronic power steering machines, which is superior to the existing technology. It is not easy to break or deform when impacted, so that it is not easy to wear during long-term use, avoiding steering failure due to slot breakage after impact.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An open slot structure of a steering gear, characterized in that: The invention comprises an open slot body (2) and a gear (3), wherein the open slot body (2) comprises four surfaces, namely a first slot surface (1A), a second slot surface (1B), a third slot surface (1C) and a fourth slot surface (1D), and the gear (3) and the open slot body (2) are rotatably connected.

2. The open slot structure of a steering gear according to claim 1, characterized in that: The first groove surface (1A), the second groove surface (1B), the third groove surface (1C) and the fourth groove surface (1D) respectively form an angle of 15° with the center line of the open groove body (2).

3. The open slot structure of a steering gear according to claim 1, characterized in that: The angle between the first groove surface (1A) and the second groove surface (1B) is 30°, and the angle between the third groove surface (1C) and the fourth groove surface (1D) is 30°.

4. The open slot structure of a steering gear according to claim 1, characterized in that: The width of the first groove surface (1A), the second groove surface (1B), the third groove surface (1C) and the fourth groove surface (1D) are all 8 mm, and the height is all 4 mm.

5. The open slot structure of a steering gear according to claim 1, characterized in that: It also includes a slot chamfer (4), wherein the slot chamfer (4) is arranged at the bottom of the opening slot body (2).

6. The open slot structure of a steering gear according to claim 1, characterized in that: The diameter of the open slot body (2) is 28.2 mm, and the diameter of the gear (3) is 23.95 mm.

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