Three-phase asynchronous motor for vehicle-mounted steering pump

Abstract

The utility model relates to the technical field of motors, in particular to a three-phase asynchronous motor for a vehicle-mounted steering pump, which comprises a motor main body and a rotating shaft arranged in the motor main body in a penetrating manner, the motor main body comprises a machine base, a front end cover and a rear end cover are respectively arranged at positions, corresponding to two ends of the rotating shaft, of the machine base, and a rotor is arranged in the circumferential direction of the rotating shaft. The three-phase asynchronous motor is characterized in that the motor base is provided with a rotor, the outer side of the rotor is sleeved with a stator which is circumferentially fixed with the motor base, the rotating shaft is rotatably connected with the front end cover through a bearing, the front end cover is provided with a limiting piece, and the bearing is fixed on the front end cover through the limiting piece. Axial movement of the rotor is eliminated, bearing impact and damage are reduced, and the service life of the motor is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a three-phase asynchronous motor for vehicle steering pumps. Background Technology

[0002] With the development of new energy power technology for automobiles, the increased awareness of energy conservation and environmental protection among automobile companies, and the government's vigorous promotion and financial subsidies for new energy vehicles, hybrid trucks and buses, as well as pure electric trucks and buses, are constantly emerging.

[0003] The steering system of hybrid or pure electric vehicles usually uses an electric hydraulic power steering pump, which uses an electric motor to drive the hydraulic steering pump instead of an engine. For example, patent CN106015023A discloses a single-shaft electric hydraulic steering pump, in which the middle of the drive shaft is fitted with a bearing in the bearing cavity on the pump body. However, this structure still has the following defects: there is no fixed structure for the installation of the bearing, and the rotor will move freely axially when the motor is working. The retaining ring restricts the movement stroke, which will impact the bearing and cause it to be easily damaged.

[0004] The purpose of this invention is to propose corresponding solutions to the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and provide a three-phase asynchronous motor for vehicle steering pumps. The bearing inside the three-phase asynchronous motor of this utility model is fixed to the front end cover of the motor by a limiting component, which eliminates the axial movement of the rotor, reduces bearing impact and damage, and thus increases the service life of the motor.

[0006] The technical solution adopted by this utility model is as follows: A three-phase asynchronous motor for a vehicle-mounted steering pump includes a motor body and a rotating shaft passing through the motor body. The motor body includes a base. The base is provided with a front end cover and a rear end cover at positions corresponding to both ends of the rotating shaft. A rotor is provided circumferentially on the rotating shaft. A stator fixed circumferentially to the base is sleeved on the outside of the rotor. The rotating shaft is rotatably connected to the front end cover through a bearing. A limiting member is provided on the front end cover. The bearing is fixed to the front end cover through the limiting member.

[0007] The front cover has an annular groove for bearing installation on the side wall near the base. The limiting member is located on the side of the front cover corresponding to the annular groove. The bearing includes an outer ring and an inner ring. The inner ring is sleeved on the rotating shaft, and the outer ring is embedded in the annular groove by the limiting member.

[0008] The rotating shaft is also provided with a step that abuts against the inner ring.

[0009] The limiting component includes a screw, a spring, and an abutment piece. The screw is threadedly connected to the side wall of the front cover near the base. The spring and the abutment piece are sequentially sleeved on the screw. When the screw is threadedly connected to the front cover, the abutment piece abuts against the side wall of the outer ring.

[0010] The rotating shaft is also rotatably connected to the rear end cover. The interior of the machine base forms a sealed cavity through the cooperation of the front end cover and the rear end cover. An oil seal is provided between the rotating shaft and the rear end cover. A vent valve is provided on the side wall of the machine base. One end of the vent valve is connected to the sealed cavity and the other end is connected to the outside of the machine base.

[0011] An O-ring is provided between the base and the front cover, and an O-ring is also provided between the base and the rear cover.

[0012] The base is also equipped with a junction box, and the junction box is equipped with a PG connector, which is sealed and connected to a lead wire.

[0013] The lead wire is a three-core wire, and the three-core wire is sheathed with a corrugated tube.

[0014] The beneficial effects of this utility model are as follows: The bearing inside the three-phase asynchronous motor of this utility model is fixed to the front end cover of the motor by the limiting component, which eliminates the axial movement of the rotor, reduces the impact and damage of the bearing, and makes the rotor rotate more smoothly. This not only protects the bearing but also facilitates the stable operation of the rotor, thereby increasing the service life of the motor. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a cross-sectional schematic diagram of a three-phase asynchronous motor for a vehicle-mounted steering pump according to the present invention;

[0017] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0018] Figure 3 This is a top view of the present invention;

[0019] Figure 4 This is a left-side view of the present invention;

[0020] In the diagram, 1-shaft, 2-base, 3-front end cover, 4-rear end cover, 5-rotor, 6-stator, 7-bearing, 8-ring groove, 9-outer ring, 10-inner ring, 11-screw, 12-spring, 13-abutment piece, 14-sealing cavity, 15-oil seal, 16-vent valve, 17-O-ring, 18-junction box, 19-PG connector, 20-lead wire, 21-bellows, 22-step. Detailed Implementation

[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0022] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0023] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0024] like Figures 1 to 4 As shown, this is an embodiment of the present invention. A three-phase asynchronous motor for a vehicle-mounted steering pump includes a motor body and a rotating shaft 1 passing through the motor body. The motor body includes a base 2. The base 2 is provided with a front end cover 3 and a rear end cover 4 at the positions corresponding to both ends of the rotating shaft 1. A rotor 5 is provided circumferentially on the rotating shaft 1. A stator 6, which is circumferentially fixed to the base 2, is sleeved on the outside of the rotor 5. The rotating shaft 1 is rotatably connected to the front end cover 3 through a bearing 7. A limiting member is provided on the front end cover 3, and the bearing 7 is fixed to the front end cover 3 through the limiting member.

[0025] The beneficial effects of this design are as follows: the bearings inside the three-phase asynchronous motor of this utility model are fixed to the front end cover of the motor by limiting components, which eliminates the axial movement of the rotor, reduces bearing impact and damage, and makes the rotor rotate more smoothly. This not only protects the bearings but also facilitates stable rotor operation, thereby increasing the service life of the motor.

[0026] Further, the front cover 3 has an annular groove 8 on the side wall near the base 2 for mounting the bearing 7. The limiting member is located on the side of the front cover 3 corresponding to the annular groove 8. The bearing 7 includes an outer ring 9 and an inner ring 10. The inner ring 10 is sleeved on the rotating shaft 1, and the outer ring 9 is embedded in the annular groove 8 by the limiting member.

[0027] The beneficial effects of this design are as follows: the recessed annular groove on the front cover is compatible with the bearing, and the bearing can be installed as a whole in the annular groove. Then, it is fixed in the annular groove by the limiting member installed on the side. The limiting member only fixes the outer ring, ensuring the normal rotation of the bearing. The bearing has a large force-bearing area, which more effectively reduces bearing impact. In addition, the annular groove can help with positioning during assembly, improving assembly efficiency.

[0028] Further, the limiting component includes a screw 11, a spring 12, and an abutment piece 13. The screw 11 is threadedly connected to the side wall of the front cover 3 near the base 2. The spring 12 and the abutment piece 13 are sequentially sleeved on the screw 11. When the screw 11 is threadedly connected to the front cover 3, the abutment piece 13 abuts against the side wall of the outer ring 9.

[0029] The beneficial effects of this design are as follows: the limiting component adopts a combination of screws, springs, and abutment plates. The screws install the springs and abutment plates on the side wall of the front cover, and the abutment plates fix the outer ring in the annular groove. The screws have the advantage of easy disassembly and assembly, the threaded connection can ensure firmness, and the springs have the functions of compensation and anti-loosening, so that the abutment plates keep in contact with the side wall of the outer ring.

[0030] Furthermore, the rotating shaft 1 is provided with a step 22 that abuts against the inner ring 10.

[0031] The beneficial effects of this design are as follows: the shaft abuts against the side wall of the inner ring through the step, and with the help of the limiting component, both the inner and outer rings can be effectively limited and fixed, further reducing the axial movement of the shaft and the impact on the bearing.

[0032] Further configuration: the rotating shaft 1 is also rotatably connected to the rear end cover 4; the interior of the base 2 forms a sealed cavity 14 through the cooperation of the front end cover 3 and the rear end cover 4; an oil seal 15 is provided between the rotating shaft 1 and the rear end cover 4; a vent valve 16 is provided on the side wall of the base 2; one end of the vent valve 16 is connected to the sealed cavity 14 and the other end is connected to the outside of the base 2.

[0033] The beneficial effects of this design are as follows: While the motor meets IP67 standards, a vent valve is added. This valve regulates the pressure inside the sealed cavity through internal and external gas exchange, preventing excessive pressure differences caused by temperature variations. Excessive pressure differences can affect the motor's lifespan and performance. It also prevents the oil seal from falling out of the rear cover. IP67 refers to a protection safety level. IP stands for Ingress Protection Rating (or International Protection Code), which defines an interface's ability to protect against liquid and solid particles. The IP is followed by two digits: the first is the solid particle protection rating, ranging from 0-6, indicating protection against everything from large particles to dust; the second is the liquid particle protection rating, ranging from 0-8, indicating protection against everything from vertical water droplets to underwater pressure. A higher number indicates stronger protection.

[0034] IP67 means protection against dust inhalation (complete protection against contact and dust penetration); protection against brief immersion (immersion protection).

[0035] Furthermore, an O-ring 17 is provided between the base 2 and the front cover 3, and an O-ring 17 is also provided between the base 2 and the rear cover 4.

[0036] The beneficial effects of this design are as follows: both the front and rear covers are equipped with O-rings, and the O-rings are pressed onto the front or rear covers by the base, achieving effective waterproof sealing.

[0037] Furthermore, the base 2 is also provided with a junction box 18, the junction box 18 is provided with a PG connector 19, and the PG connector 19 is sealed and connected to a lead wire 20.

[0038] The advantages of this design are as follows: a PG connector is a type of connector used for wire and cable connections, commonly used in industrial and electronic equipment to ensure stable wire connections and waterproof and dustproof functions. The wiring method uses a PG connector with lead wires, and there are no terminals on the motor. This wiring method has the advantage of being more sealed and waterproof than ordinary terminals, meeting the IP67 standard.

[0039] Further configuration: the lead wire 20 is a three-core wire, and the three-core wire is sheathed with a corrugated tube 21.

[0040] The advantages of this design are as follows: the lead wire uses a corrugated tube wrapped around the three-core wire, resulting in a strong connection and a waterproof seal.

[0041] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A three-phase asynchronous motor for a vehicle-mounted steering pump, comprising a motor body and a rotating shaft (1) arranged in the motor body, the motor body comprising a base (2), the base (2) being provided with a front end cover (3) and a rear end cover (4) corresponding to the positions of both ends of the rotating shaft (1), and the rotating shaft (1) being provided with a rotor (5) in the circumferential direction, and the rotor (5) being provided with a stator (6) fixed in the circumferential direction of the base (2) on the outer side, characterized in that: The rotating shaft (1) is rotatably connected with the front end cover (3) through a bearing (7), the front end cover (3) is provided with a limiting piece, and the bearing (7) is fixed on the front end cover (3) through the limiting piece; The side wall of the front end cover (3) near the base (2) is provided with an annular groove (8) for mounting the bearing (7), the limiting piece is arranged at the position of the side of the front end cover (3) corresponding to the annular groove (8), the bearing (7) comprises an outer ring (9) and an inner ring (10), the inner ring (10) is sleeved on the rotating shaft (1), and the outer ring (9) is inlaid in the annular groove (8) through the limiting piece; The limiting piece comprises a screw (11), an elastic sheet (12) and an abutting sheet (13), the screw (11) is threadedly connected with the side wall of the front end cover (3) near the base (2), the elastic sheet (12) and the abutting sheet (13) are sequentially sleeved on the screw (11), and the abutting sheet (13) abuts against the side wall of the outer ring (9) when the screw (11) is threadedly connected with the front end cover (3).

2. A three-phase induction motor for a vehicle-mounted steering pump according to claim 1, characterized by: The rotating shaft (1) is also provided with a step (22) abutting against the inner ring (10).

3. A three-phase induction motor for a vehicle-mounted steering pump according to claim 1, characterized in that: The rotating shaft (1) is also rotatably connected with the rear end cover (4), the inside of the base (2) forms a sealed cavity (14) through cooperation of the front end cover (3) and the rear end cover (4), an oil seal (15) is arranged between the rotating shaft (1) and the rear end cover (4), and the side wall of the base (2) is provided with a breather valve (16), one end of the breather valve (16) is in communication with the sealed cavity (14) and the other end is in communication with the outside of the base (2).

4. A three-phase induction motor for a vehicle-mounted steering pump according to claim 3, characterized in that: O-rings (17) are arranged between the base (2) and the front end cover (3) and between the base (2) and the rear end cover (4).

5. A three-phase induction motor for a vehicle-mounted steering pump according to claim 1, characterized by: The base (2) is also provided with a junction box (18), the junction box (18) is provided with a PG head (19), and the PG head (19) is sealingly connected with a lead wire (20).

6. A three-phase induction motor for a vehicle-mounted steering pump according to claim 5, characterized in that: The lead wire (20) adopts a three-core wire, and the three-core wire is sleeved with a bellows (21).

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