Motor for driving piston assembly and air compressor

Abstract

The utility model relates to the field of automobile air compression equipment, in particular to a motor for driving a piston assembly and an air compressor. The motor used for driving the piston assembly comprises an installation shell, a central main shaft arranged in the installation shell, an armature iron core arranged on the central main shaft in a sleeving mode, a winding wound on the armature iron core, a permanent magnet arranged on the outer side of the armature iron core, a commutator arranged on the outer side of the central main shaft in a sleeving mode and an electric brush. And the central position of the permanent magnet is deviated from the central position of the armature iron core. According to the motor used for driving the piston assembly, the permanent magnet and the armature iron core are installed in a non-centering mode, so that single-side magnetic pulling force faces the direction away from the end cover, the limiting effect is achieved, the motor is prevented from moving towards the direction of the end cover, and the stability of an air compressor is improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile air compression equipment, in particular to a motor and an air compressor for driving a piston assembly. Background Art

[0002] As the core component of the air suspension system, the air compressor provides dry compressed air for the air suspension system and inputs the compressed air into the air tank or air spring to complete the horizontal adjustment of the vehicle body height.

[0003] The main function of the air compressor is to compress the external low-pressure gas into high-pressure gas by the piston movement of the piston assembly in the compression cylinder, and then input it into the air tank or air spring. In the air compressor, the motor is used as the power source to drive the piston assembly, and the rotating main shaft of the motor is connected to one end of the piston assembly. During the operation of the air compressor, since the piston assembly is located in the compression cylinder and moves up and down, the motor connected to one side of the compression cylinder will be vibrated and move to one side, causing the motor connection to be offset, thereby reducing the service life of the air compressor. Utility Model Content

[0004] In view of this, the utility model provides a motor and an air compressor for driving a piston assembly. The permanent magnet and the armature core are installed in an uncentered manner so that the unilateral magnetic pulling force is directed away from the end cover, thereby limiting the movement of the motor toward the end cover, thereby improving the stability of the air compressor.

[0005] The utility model solves the technical problem by adopting the following technical solution: a motor for driving a piston assembly is provided, which is used for an air compressor. The motor for driving the piston assembly comprises a mounting shell, a central spindle arranged inside the mounting shell, an armature core sleeved on the central spindle, a winding wound on the armature core, a permanent magnet arranged on the outside of the armature core, a commutator and a brush sleeved on the outside of the central spindle, and the center position of the permanent magnet is offset from the center position of the armature core.

[0006] Furthermore, the mounting shell is substantially in the shape of a cylinder with one end open, and the mounting shell includes a shell portion and an end cover.

[0007] Furthermore, a mounting groove is provided in the center of the end cover, and the mounting groove is in the form of a cylindrical groove body. A rotating bearing is installed in the mounting groove, and the rotating bearing is fixedly connected to one end of the central spindle.

[0008] Furthermore, a fixing groove is provided on one end of the central main shaft away from the end cover, and the fixing groove is in the form of a cylindrical groove body.

[0009] Furthermore, a stopper is provided on the outer side surface of the central main shaft, and the stopper is in a circular ring shape.

[0010] Furthermore, the armature core includes a yoke ring, a pole and a pole shoe arranged on the outer side of the yoke ring.

[0011] Furthermore, the yoke ring has an inner ring edge and an outer ring edge, an axial hole is formed inside the inner ring edge, and the diameter of the axial hole matches the outer side surface of the central main shaft.

[0012] Furthermore, a plurality of poles are provided, and the poles are connected to the outer ring edge of the yoke ring. The number of the poles is twelve, and the plurality of poles are arranged on the outer periphery of the yoke ring in an equiangularly distributed manner.

[0013] Furthermore, the height of the permanent magnet is greater than the height of the pole shoe of the armature core, and the center position of the permanent magnet is offset from the center position of the armature core, and the distance from the center of the permanent magnet to the end cover is less than the distance from the center of the armature core to the end cover.

[0014] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an air compressor, including the motor for driving the piston assembly provided by any of the above-mentioned solutions.

[0015] The beneficial effects of the utility model are as follows: the utility model is a motor and an air compressor for driving a piston assembly, wherein the motor for driving the piston assembly comprises a mounting shell, a central spindle arranged inside the mounting shell, an armature core sleeved on the central spindle, a winding wound on the armature core, a permanent magnet arranged on the outside of the armature core, a commutator and a brush sleeved on the outside of the central spindle, the center position of the permanent magnet is offset from the center position of the armature core, the distance from the center of the permanent magnet to the end cover is smaller than the distance from the center of the armature core to the end cover, the permanent magnet and the armature core are installed in an uncentered manner, so that the unilateral magnetic pulling force is directed in a direction away from the end cover, thereby limiting the movement of the motor to prevent the motor from moving in the direction of the end cover, thereby ensuring the stability of the movement of the piston assembly driven by the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is an exploded view of the motor for driving the piston assembly of the utility model;

[0018] Figure 2 It is a cross-sectional view of the motor for driving the piston assembly of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the armature core of the utility model;

[0020] Figure 4 It is a cross-sectional view of a motor for driving a piston assembly, a compression cylinder body and a piston assembly of the utility model.

[0021] The names and numbers of the parts in the figure are:

[0022] A motor 100 for driving the piston assembly;

[0023] Mounting shell 1, shell portion 11, end cover 12, mounting groove 13, rotating bearing 14;

[0024] Central spindle 2, fixing groove 21, blocking portion 22;

[0025] Armature core 3, yoke ring 31, pole 32, pole shoe 33;

[0026] Winding 4;

[0027] Permanent magnet 5, permanent magnet N pole 51, permanent magnet S pole 52;

[0028] Commutator 6;

[0029] Brush 7; compression cylinder 200;

[0030] The piston assembly 300 is connected to the shaft 310 . DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the composition related to the utility model. Obviously, the described embodiment is a part of the embodiment 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 making creative work are within the scope of protection of the utility model.

[0032] like Figure 1 , Figure 2 As shown, this embodiment provides a motor 100 for driving a piston assembly, including a mounting shell 1, a central spindle 2 arranged inside the mounting shell 1, an armature core 3 sleeved on the central spindle 2, a winding 4 wound on the armature core 3, a permanent magnet 5 arranged on the outside of the armature core 3, and a commutator 6 and a brush 7 sleeved on the outside of the central spindle 1.

[0033] In some embodiments, such as Figure 4As shown, the mounting shell 1 is roughly cylindrical with one end open, and the mounting shell 1 includes a shell portion 11 and an end cover 12. One end of the shell portion 11 is suitable for sealing connection with the compression cylinder 100 of the air compressor. Specifically, a sealing ring is provided inside one end of the shell portion 11 to seal the compression cylinder 100 of the air compressor. The end cover 12 is a circular cover body, the diameter of the end cover 12 matches the diameter of the shell portion 11, and the cover is provided at one end of the shell portion 11 away from the compression cylinder 100. A mounting groove 13 is provided in the center of the end cover 12. The mounting groove 13 is located on a side surface close to the shell portion 11. The mounting groove 13 is a cylindrical groove body. The mounting groove 13 is suitable for installing a rotating bearing 14. The outer ring body of the rotating bearing 14 is fixedly connected to the mounting groove 13, and the inner ring of the rotating bearing 14 is fixedly connected to one end of the central main shaft 2.

[0034] In some embodiments, the central spindle 2 is arranged on the central axis of the mounting shell 1. One end of the central spindle 2 is fixed on the rotating bearing 14, and the other end of the central spindle 2 is led out from the opening of the mounting shell 1 and fixedly connected to the piston assembly 300. The diameter of the end of the central spindle 2 close to the piston assembly 300 is larger than the diameter of the central spindle 2 close to the rotating bearing 14. A fixing groove 21 is provided on the end of the central spindle 2 away from the end cover 12. The fixing groove 21 is a cylindrical groove body and is provided at the central position of the end surface of the central spindle 2. The diameter of the fixing groove 21 matches the diameter of the connecting shaft 310 on the piston assembly 300, and the connecting shaft 310 on the piston assembly 300 is fixedly installed in the fixing groove 21 of the central spindle 2, so that when the motor drives the central spindle to rotate, the piston assembly 300 is driven to move. A stopper 22 is provided on the outer side surface of one end of the central spindle 2 close to the compression cylinder 100 of the air compressor, and the stopper 22 is in a circular ring shape. The annular resisting portion 22 abuts against the mounting bearing of the compression cylinder 200, the outer ring of the mounting bearing is fixed at the opening of the compression cylinder 200, and the inner ring of the mounting bearing 210 is fixed to the outer side of the central spindle 2 close to the piston assembly 200. The resisting portion 22 abuts against the side surface of the mounting bearing 210 away from the piston assembly 300 to prevent one end of the central spindle 2 from shifting to one side of the piston assembly 300.

[0035] In some embodiments, such as Figure 3As shown, the armature core 3 is sleeved on the central spindle 2. The armature core 3 is formed by stacking and combining a plurality of silicon steel sheets. The armature core 3 includes a yoke ring 31, a pole 32 and a pole shoe 33 arranged on the outer side of the yoke ring 31. The yoke ring 31 has an inner ring edge and an outer ring edge. An axial hole is formed inside the inner ring edge. The diameter of the axial hole matches the outer side surface of the central spindle 2, so that the yoke ring 31 is sleeved and fixed on the outer side surface of the central spindle. There are multiple poles 32, and the poles 32 are connected to the outer ring edge of the yoke ring 31. The number of poles 32 can be three or a multiple of three. In this embodiment, the number of poles 32 is twelve. The multiple poles 32 are arranged on the outer periphery of the yoke ring 31 in an equiangular distribution, and one end of each pole 32 is connected to the outer ring edge of the yoke ring 31. The poles 32 are suitable for winding the winding 4. There are multiple pole shoes 33, the number of which is equal to the number of poles 32, and the multiple pole shoes 33 are respectively connected to the other ends of the multiple poles 32, so that each pole 32 can expand the magnetic conductive area by the outer edge of the connected pole shoe 33, and can also limit the winding range of the winding 4 not to exceed the point where the pole 32 is connected to the pole shoe 33. The yoke ring 31, pole 32 and pole shoe 33 of the armature core 3 are an integrated structure, which can ensure the stability of the structure of the armature core 3.

[0036] In some embodiments, the winding 4 is wound on the armature core 3. Specifically, the winding 4 is a closed copper coil, and the winding 4 is provided with multiple groups, and the multiple groups of windings 4 are respectively wound on multiple poles 32 of the armature core 3.

[0037] In some embodiments, the permanent magnet 5 is arranged on the outside of the armature core 3, wherein the permanent magnet 5 does not contact the armature core 3. The permanent magnet 5 includes a permanent magnet N pole 51 and a permanent magnet S pole 52, the permanent magnet N pole 51 and the permanent magnet S pole 52 are arc-shaped, and the permanent magnet N pole 51 and the permanent magnet S pole 52 are symmetrically fitted on the inner side surface of the shell portion 11 respectively. The height of the permanent magnet 5 is greater than the height of the pole shoe 33 of the armature core 3, the permanent magnet 5 is fitted on the inner side surface of the shell portion 11 of the mounting shell 1, and the center position of the permanent magnet 5 is offset from the center position of the armature core 3, and the distance from the center of the permanent magnet 5 to the end cover 12 is less than the distance from the center of the armature core 3 to the end cover 12, so that the permanent magnet 5 and the armature core 3 are installed in an uncentered manner, so that the unilateral magnetic pulling force is directed in the direction away from the end cover 12, thereby limiting the motor from moving in the direction of the end cover 12, thereby ensuring the stability of the motor driving the piston assembly 300 to move.

[0038] In some embodiments, the commutator 6 is sleeved on the outside of the central spindle 1, and the commutator 6 is located between the end cover 12 and the armature core 3. The brush 7 is arranged on one side of the commutator 6.

[0039] The motor 100 for driving the piston assembly of the utility model is provided with a mounting shell 1, and the mounting shell 1 includes a shell portion 11 and an end cover 12. One end of the shell portion 11 is suitable for sealing connection with the compression cylinder 100 of the air compressor, and a mounting groove 13 is provided in the center of the end cover 12. The mounting groove 13 is suitable for installing a rotating bearing 14, and the rotating bearing 14 is suitable for fixing one end of the central spindle 2; a fixing groove 21 is provided at the other end of the central spindle 2, and a connecting shaft 310 on the piston assembly 300 is fixedly installed in the fixing groove 21 of the central spindle 2, so that when the motor drives the central spindle to rotate, the piston assembly 300 is driven to move, and a resisting portion 22 is provided, which resists against the side surface of the mounting bearing 210 away from the piston assembly 300 to prevent one end of the central spindle 2 from shifting toward one side of the piston assembly 300; the armature core 3 is sleeved on the central spindle 2, and the armature The core 3 is formed by stacking and combining multiple silicon steel sheets. The armature core 3 includes a yoke ring 31, a pole 32 and a pole shoe 33 arranged on the outer side of the yoke ring 31. The yoke ring 31, the pole 32 and the pole shoe 33 of the armature core 3 are an integrated structure, which can ensure the stability of the structure of the armature core 3; the height of the permanent magnet 5 is greater than the height of the pole shoe 33 of the armature core 3, the permanent magnet 5 is fitted on the inner side of the shell portion 11 of the mounting shell 1, and the center position of the permanent magnet 5 is offset from the center position of the armature core 3. The distance from the center of the permanent magnet 5 to the end cover 12 is less than the distance from the center of the armature core 3 to the end cover 12, so that the permanent magnet 5 and the armature core 3 are installed in an uncentered manner, so that the unilateral magnetic pulling force is directed in the direction away from the end cover 12, thereby limiting the motor from moving in the direction of the end cover 12, thereby ensuring the stability of the motor driving the piston assembly 300 to move.

[0040] When the motor 100 of the utility model for driving the piston assembly is in use, since the permanent magnet N pole 51 and the permanent magnet S pole 52, the brush 7, the armature core 3, the winding 4 wound on the armature core 3 and the commutator 6 are symmetrically arranged on the inner side wall of the shell portion 11 of the mounting shell 1, the electric energy of the DC power supply enters the winding 4 through the brush 7 and the commutator 6, generating an armature current, and the magnetic field generated by the armature current interacts with the magnetic field on the permanent magnet 5 to generate an electromagnetic torque, thereby driving the central spindle 2 to rotate.

[0041] like Figure 4 As shown, an embodiment of the utility model further provides an air compressor, which includes a motor 100 for driving a piston assembly provided in any of the above embodiments, and the air compressor also includes a compression cylinder 200 and a piston assembly 300, wherein the compression cylinder 300 is fixed to one side of an opening of a mounting shell 1 of the motor, the piston assembly 300 is installed in the compression cylinder 200, and the piston assembly 300 is connected to the central spindle 2 of the motor.

[0042] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A motor for driving a piston assembly, used in an air compressor, It is characterized in that The invention comprises a mounting shell, a central spindle arranged inside the mounting shell, an armature core sleeved on the central spindle, a winding wound on the armature core, a permanent magnet arranged outside the armature core, a commutator and a brush sleeved outside the central spindle, wherein the center position of the permanent magnet is offset from the center position of the armature core.

2. The motor for driving the piston assembly according to claim 1, It is characterized in that The mounting shell is substantially in the shape of a cylinder with one end open, and comprises a shell portion and an end cover.

3. The motor for driving the piston assembly according to claim 2, It is characterized in that A mounting groove is arranged at the center of the end cover, and the mounting groove is in the form of a cylindrical groove body. A rotating bearing is installed in the mounting groove, and the rotating bearing is fixedly connected to one end of the central main shaft.

4. The motor for driving the piston assembly according to claim 2, It is characterized in that A fixing groove is provided on one end of the central main shaft away from the end cover, and the fixing groove is in the form of a cylindrical groove body.

5. The motor for driving a piston assembly according to claim 1, It is characterized in that A stopper is arranged on the outer side surface of the central main shaft, and the stopper is in a circular ring shape.

6. The motor for driving a piston assembly according to claim 2, It is characterized in that The armature core includes a yoke ring, a pole arranged on the outer side of the yoke ring, and a pole shoe.

7. The motor for driving the piston assembly according to claim 6, It is characterized in that The yoke ring has an inner ring edge and an outer ring edge. An axial hole is formed inside the inner ring edge. The diameter of the axial hole matches the outer side surface of the central main shaft.

8. The motor for driving a piston assembly according to claim 7, It is characterized in that There are a plurality of poles connected to the outer edge of the yoke ring. There are twelve poles, and the plurality of poles are arranged on the outer periphery of the yoke ring in an equiangularly distributed manner.

9. The motor for driving a piston assembly according to claim 6, It is characterized in that The height of the permanent magnet is greater than the height of the pole shoe of the armature core, and the distance from the center of the permanent magnet to the end cover is less than the distance from the center of the armature core to the end cover.

10. An air compressor, Features: The air compressor comprises a motor for driving a piston assembly as claimed in any one of claims 1 to 9.

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