Motor device for brake booster pump of electric vehicle

Abstract

The utility model relates to a motor device for an electric automobile brake booster pump, which comprises a shell, a rotating shaft is rotatably arranged at the center of the shell, a rotor is fixedly sleeved on the rotating shaft, a stator is wound outside the rotor and fixed on the inner side wall of the shell, one end of the rotating shaft extends out from one side of the shell, and the other end of the rotating shaft extends out from the other side of the shell. The extending part of the rotating shaft is provided with a worm, one side of the circumference of the worm is meshed with an axially-perpendicular worm gear, a center shaft on one side of the worm gear extends to be provided with a lead screw, the lead screw is sleeved with a nut, and the outer end of the nut pushes a push plate connected with the nut to move linearly. According to the motor, the output rotating shaft is the worm meshed with the worm gear, the screw rod of the center shaft of the worm drives the nut to move linearly, the structure is simple, the transmission ratio is large, the transmission efficiency is improved, the occupied space is small, and adjustability and variability are achieved. Worm transmission has self-locking performance, namely, in the stop working state, reverse movement of a transmitted component is prevented, the mechanical self-locking function is achieved, and therefore safety is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, in particular to a motor device for a brake booster pump of an electric vehicle. Background Art

[0002] When a car decelerates and brakes, a booster is needed to reduce the force applied by the driver to the pedal. Traditionally, a vacuum booster connected to the pedal linkage is used for this purpose. The vacuum booster uses vacuum to generate negative pressure to achieve force. The most common way to obtain vacuum is to utilize the working characteristics of the engine itself and connect the intake manifold to the vacuum booster through a pipe, thereby introducing the vacuum generated by the engine during operation into the booster. Different from traditional cars, new energy vehicles are gradually developing, mainly electric vehicles. They lack internal fuel engines and use electric motors to assist the vacuum booster pump. In order to achieve the appropriate output speed of the motor, many reduction gears are connected to the motor, making the overall structure of the motor complex, occupying a large space, and having low control accuracy. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a motor device for a brake booster pump of an electric vehicle, so as to solve the problems of large size and low control accuracy of the booster pump.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A motor device for a brake booster pump of an electric vehicle includes a housing, a rotating shaft rotatably provided at the center of the housing, a rotor fixedly sleeved on the rotating shaft, a stator surrounding the outside of the rotor, and the stator fixed to the inner wall of the housing, one end of the rotating shaft extending from one side of the housing, the extending portion of the rotating shaft being configured as a worm, a worm wheel with an axially perpendicular worm gear engaged on one side of the circumference of the worm, a screw rod extending from the center axis of one side of the worm wheel, a nut sleeved on the screw rod, and the outer end of the nut pushing a connected push plate to move linearly.

[0006] As a preferred embodiment, the shell includes a left half shell and a right half shell that are arranged opposite to each other, the circumferential edge of the left half shell is sleeved on the circumferential edge of the right half shell, and a sealing strip is arranged between the inner circumference of the left half shell and the outer circumference of the right half shell.

[0007] As a preferred embodiment, the push plate is arranged in a closed oil tank so as to slide in a straight line, the inner cavity of the oil tank is filled with hydraulic oil, and the oil tank is connected to a plurality of pipelines communicating with the outside world.

[0008] The beneficial effects of the present invention are as follows: the motor uses an output shaft that meshes with the worm and worm wheel, and the screw on the worm's central axis drives the nut to move linearly. This simple structure and high transmission ratio, which can reach 40:1-300:1, improve transmission efficiency, occupy a small space, and provide adjustability and variability. The worm drive is self-locking. That is, when the working state is stopped, the bevel of the worm blade and the teeth of the worm wheel engage with each other, preventing the driven parts from moving in the opposite direction, achieving a mechanical self-locking effect, and effectively ensuring safety. The product has a simple, compact, and lightweight structure, can be applied to various special occasions, and achieves a high degree of structural integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0010] Figure 1 It is a cross-sectional view of the utility model;

[0011] Figure 2 This is a schematic diagram from another perspective of the present invention;

[0012] Figure 1~Figure 2 Explanation of the reference numerals in the accompanying drawings: 1. Housing; 2. Rotor; 3. Stator; 4. Rotating shaft; 5. Worm; 6. Worm wheel; 7. Screw; 8. Nut; 9. Push plate; 10. Oil tank; 11. Hydraulic oil; 12. Pipeline; 101. Left half shell; 102. Right half shell; 103. Sealing strip. DETAILED DESCRIPTION

[0013] The specific implementation scheme of the present utility model is described in detail below with reference to the accompanying drawings.

[0014] like Figure 1~Figure 2 The motor device shown for the brake booster pump of an electric vehicle includes a shell 1, a rotating shaft 4 is rotatably provided at the center of the shell 1, a rotor 2 is fixedly sleeved on the rotating shaft 4, a stator 3 is surrounded by the outside of the rotor 2, and the stator 3 is fixed on the inner wall of the shell 1, one end of the rotating shaft 4 extends from one side of the shell 1, and the protruding part of the rotating shaft 4 is configured as a worm 5, and an axially vertical worm wheel 6 is engaged with one side of the circumference of the worm 5, and a central axis of one side of the worm wheel 6 extends out to be configured as a screw 7, and a nut 8 is sleeved on the screw 7, and the outer end of the nut 8 pushes the connected push plate 9 to move linearly.

[0015] Specifically, the motor's rotor 2 is mounted on a central rotating shaft 4, resulting in a compact, small-footprint motor, conveniently installed within an electric vehicle. The worm 5 and worm wheel 6 cooperate in transmission, allowing the worm 5 to rotate the worm wheel 6 while the worm wheel 6 cannot rotate the worm wheel 5, achieving one-way transmission. When the motor is not in operation, reverse motion of the driven components is prevented, achieving a mechanical self-locking effect and effectively ensuring safety.

[0016] The housing 1 comprises a left half-shell 101 and a right half-shell 102, which are arranged opposite each other. The circumferential edge of the left half-shell 101 is sleeved over the circumferential edge of the right half-shell 102. A sealing strip 103 is provided between the inner circumference of the left half-shell 101 and the outer circumference of the right half-shell 102. The motor housing 1 is sealed and waterproof to ensure efficient operation of the motor.

[0017] Furthermore, the push plate 9 is linearly slidably disposed within a closed oil tank 10. The inner cavity of the oil tank 10 is filled with hydraulic oil 11, and the oil tank 10 is connected to multiple pipes 12 that communicate with the outside world. Utilizing the incompressibility of the liquid, the next operation is hydraulically driven, achieving a reliable and precise braking process.

[0018] The working process of this utility model is as follows:

[0019] According to Figure 1-2, first, when braking, step on the pedal, and the signal of the force felt by the pedal is transmitted to the controller. The controller controls the rotation of the motor according to the signal. Then, the shaft 4 rotates to drive the worm gear 6 to rotate. The nut 8 on the worm gear 6 pushes the hydraulic oil 11 into each pipeline 12 to achieve terminal braking. After braking is completed, the motor rotates in the opposite direction to reset the push plate 9 of the oil tank 10.

[0020] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A motor device for a brake booster pump of an electric vehicle, characterized in that: The invention comprises a housing (1), a rotating shaft (4) rotatably provided at the center of the housing (1), a rotor (2) fixedly sleeved on the rotating shaft (4), a stator (3) surrounding the outside of the rotor (2), and a stator (3) fixed on the inner wall of the housing (1), one end of the rotating shaft (4) extending from one side of the housing (1), a protruding portion of the rotating shaft (4) being provided as a worm (5), a worm wheel (6) vertically extending in the axial direction being engaged with the worm wheel (5), a central axis extending from one side of the worm wheel (6) being provided as a screw (7), a nut (8) being sleeved on the screw (7), and the outer end of the nut (8) pushing a connected push plate (9) to move linearly.

2. The motor device for the electric vehicle brake booster pump according to claim 1, characterized in that: The housing (1) comprises a left half shell (101) and a right half shell (102) arranged opposite to each other, the circumferential edge of the left half shell (101) being sleeved on the circumferential edge of the right half shell (102), and a sealing strip (103) being arranged between the inner circumference of the left half shell (101) and the outer circumference of the right half shell (102).

3. The motor device for the electric vehicle brake booster pump according to claim 1, characterized in that: The push plate (9) is arranged in a closed oil tank (10) so as to slide along a straight line. The inner cavity of the oil tank (10) is filled with hydraulic oil (11). The oil tank (10) is connected to a plurality of pipelines (12) communicating with the outside world.

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