Steering nut of electric automobile

Abstract

The utility model discloses an electric automobile steering nut which comprises a nut body, a plurality of assembling steps are arranged on the outer wall of the nut body, external threads are arranged on the outer side of the top of the nut body and are of a triangular thread structure, and internal threads are arranged on the upper side and the lower side of the interior of the nut body and are of a trapezoidal thread structure. An oil storage groove is formed between the internal threads on the upper side and the lower side of the nut body, an oil injection hole is formed in the outer side of the oil storage groove, and the output end of the oil injection hole communicates with the oil storage groove. According to the utility model, the internal thread is arranged in the trapezoidal thread structure, the structure is simple, the performance is stable, the processing and the assembly are convenient, the number of assembly parts is small, the assembly precision is high and the first-pass yield is high by matching with the trapezoidal thread screw rod, and the trapezoidal thread is matched with the trapezoidal thread screw rod, so that the bearing capacity of the thread is enhanced; and the transmission efficiency is optimized, when the same torque is transmitted, stress distribution is more uniform, and the risks of local abrasion and breakage are reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric vehicle steering nuts, specifically relating to an electric vehicle steering nut. Background Technology

[0002] Current automotive electric steering system nuts typically use ball nuts, which are assembled with steel balls and a ball screw-type rack. The steel balls circulate between the nut and the ball screw through a steering gear installed in the steering groove on the outer circle of the nut.

[0003] Existing electric steering nut for automobiles requires a high level of skill from the assemblers; the assembly effect and precision are not ideal, and the first-time assembly pass rate is not high; moreover, the ball bearing nut track is difficult to process, and the rigidity requirements of the equipment and tools are high. Therefore, there is an urgent need for an electric vehicle steering nut to solve the above problems. Utility Model Content

[0004] In view of the problems mentioned above in the background art, the purpose of this utility model is to provide a steering nut for electric vehicles.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] An electric vehicle steering nut includes a nut body with several mounting steps on its outer wall. The top outer side of the nut body has an external thread with a triangular thread structure. The upper and lower sides of the nut body have internal threads with a trapezoidal thread structure. The nut body has an oil reservoir between the upper and lower internal threads. The nut body has an oil injection hole on the outside of the oil reservoir, and the output end of the oil injection hole is connected to the oil reservoir.

[0007] Furthermore, the cross-section of the internal thread is trapezoidal, and the thread angle is °. This structural design gives it a large load-bearing capacity.

[0008] Furthermore, the nut body has positioning planes on both outer sides. This structural design facilitates subsequent installation and use.

[0009] Furthermore, the outer bottom of the nut body is provided with a flange step. This structural design facilitates installation.

[0010] Furthermore, the nut body has an oil seal hole at its inner bottom, which is connected to the internal thread and the oil reservoir. This structural design facilitates connection with the lead screw.

[0011] The beneficial effects of this utility model are as follows: By setting the internal thread to a trapezoidal thread structure, this utility model has a simple structure, stable performance, and is convenient for processing and assembly. By cooperating with a trapezoidal thread screw, fewer assembly parts are required, assembly accuracy is high, the first-pass yield is high, and the overall skill requirements for assembly personnel are not high. Furthermore, the cooperation between the trapezoidal thread and the trapezoidal thread screw not only enhances the load-bearing capacity of the thread but also optimizes the transmission efficiency. This design makes the stress distribution more uniform when the trapezoidal thread transmits the same torque, reducing the risk of local wear and breakage. Moreover, this structure has self-locking properties, which can ensure directional stability during vehicle operation. Attached Figure Description

[0012] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0013] Figure 1 This is a schematic diagram of the axle side structure of an electric vehicle steering nut according to an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the internal structure of an electric vehicle steering nut according to an embodiment of the present invention;

[0015] The symbols for the main components are explained below:

[0016] Nut body 1, assembly step 2, external thread 3, internal thread 4, oil reservoir 5, oil injection hole 6, positioning plane 7, flange step 8, oil seal fitting hole 9. Detailed Implementation

[0017] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1-2 As shown, this utility model discloses a steering nut for an electric vehicle. The outer wall of the nut body 1 is provided with several assembly steps 2. The top outer side of the nut body 1 is provided with an external thread 3, which is set in a triangular thread structure. The upper and lower sides of the nut body 1 are provided with internal threads 4, which are set in a trapezoidal thread structure. The nut body 1 is provided with an oil reservoir 5 between the upper and lower internal threads 4. The nut body 1 is provided with an oil injection hole 6 on the outside of the oil reservoir 5. The output end of the oil injection hole 6 is connected to the oil reservoir 5.

[0019] Preferably, the cross-section of the internal thread 4 is trapezoidal, and the thread angle of the internal thread 4 is 30°. This structural design gives it a large load-bearing capacity. In practice, other structural shapes of the internal thread 4 can also be considered depending on the specific circumstances.

[0020] Preferably, the nut body 1 has positioning planes 7 on both outer sides. This structural design facilitates subsequent installation and use. In practice, other structural shapes of the positioning planes 7 can also be considered depending on the specific circumstances.

[0021] Preferably, the outer bottom of the nut body 1 is provided with a flange step 8. This structural design facilitates installation. In practice, other structural shapes of the flange step 8 can also be considered depending on the specific circumstances.

[0022] Preferably, the bottom inner side of the nut body 1 is provided with an oil sealing hole 9, which is connected to the internal thread 4 and the oil reservoir 5. This structural design facilitates connection with the lead screw. In practice, other structural shapes of the oil sealing hole 9 can also be considered depending on the specific circumstances.

[0023] In this embodiment, during use, the external thread 3 on the outer side of the nut body 1 is used to connect to the synchronous pulley. The step 2 can be used to limit the movement. The internal thread 4 is used to cooperate with the lead screw. After the nut and the lead screw are assembled, oil can be injected into the oil reservoir 5 through the oil injection hole 6 to achieve a long-term lubrication effect.

[0024] Among them, the internal thread 4 is set with a trapezoidal thread structure, which is used to cooperate with the trapezoidal thread screw. The trapezoidal thread is easier to process than the ball track of the ball nut, does not require special tool design, and has higher processing accuracy and lower cost.

[0025] In automobile manufacturing, trapezoidal threads are often used in key components such as rear wheel steering systems to provide stable motion transmission and positioning functions.

[0026] Trapezoidal threads typically consist of two symmetrical straight lines and two oblique lines. Compared to other types of threads, trapezoidal threads have longer oblique lines, resulting in greater load-bearing capacity. The tooth profile angle of trapezoidal threads is 30°, which is the tooth profile angle of metric trapezoidal threads specified in Chinese standards.

[0027] Trapezoidal threads have slightly lower transmission efficiency than rectangular threads, but they have better processability, higher root strength, better centering, and the internal and external threads are tightly fitted with tapered surfaces, making them less prone to loosening, which helps improve the stability of the connection.

[0028] Trapezoidal threads have a self-locking property, meaning that when an external force is applied to the nut, the thread generates friction, which keeps the nut in place on the screw. This self-locking property allows trapezoidal threads to be used in applications that require preventing loosening or automatic locking.

[0029] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A steering nut for an electric vehicle, characterized in that: The nut body (1) includes a nut body (1) with several assembly steps (2) on its outer wall. The nut body (1) has an external thread (3) on its top outer side, which is a triangular thread structure. The nut body (1) has internal threads (4) on its upper and lower sides, which are trapezoidal thread structures. The nut body (1) has an oil reservoir (5) between the internal threads (4) on its upper and lower sides. The nut body (1) has an oil injection hole (6) on the outer side of the oil reservoir (5), and the output end of the oil injection hole (6) is connected to the oil reservoir (5).

2. The electric vehicle steering nut according to claim 1, characterized in that: The cross-section of the internal thread (4) is trapezoidal, and the tooth angle of the internal thread (4) is 30°.

3. The electric vehicle steering nut according to claim 2, characterized in that: The nut body (1) has positioning planes (7) on both sides of its outer surface.

4. The electric vehicle steering nut according to claim 3, characterized in that: The outer bottom of the nut body (1) is provided with a flange step (8).

5. The electric vehicle steering nut according to claim 4, characterized in that: The bottom inner side of the nut body (1) is provided with an oil sealing hole (9), which is connected to the internal thread (4) and the oil reservoir (5).

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