Gear assembly of motor

Abstract

The utility model provides a gear assembly of a motor, and belongs to the technical field of machinery. The problem of poor stability in the prior art is solved. The gear assembly of the motor comprises a gear and a feedback magnet, the gear comprises a body and a meshing portion, the body is cylindrical, the meshing portion is a plurality of teeth evenly distributed on the outer side of the middle of the body in the circumferential direction, one end of the body is a connecting end used for being connected with a motor rotating shaft, and the other end of the body is provided with a mounting portion. And the feedback magnet is embedded in the mounting part and is in close fit connection with the mounting part, and the feedback magnet is used for detecting the position of the motor rotor and outputting a corresponding signal. The gear assembly of the motor is high in stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a gear assembly of a motor. Background Art

[0002] Motor-gear transmission is a common method of mechanical transmission, offering advantages such as high efficiency, compact structure, and reliable operation. It is widely used in various mechanical devices, such as electric axle assemblies and lift window actuators. The motor can also be connected to a planetary differential via a gear transmission to achieve power transmission. In lift window actuators, the motor drives the gear train, which in turn drives the drive shaft and transmission mechanism to achieve window raising and lowering.

[0003] Feedback magnets are magnetic components used in precision control and measurement systems, typically in applications requiring high accuracy and stability. Feedback magnets provide real-time feedback by monitoring changes in the magnetic field, enabling precise control of the system. Therefore, feedback magnets are widely used in motors such as DC motors and brushless motors.

[0004] In brushless motors, feedback magnets are typically used in conjunction with magnetic detection elements such as Hall elements to detect the magnetic field of the rotor magnet and output a signal.

[0005] The feedback magnet in the existing motor is usually connected to the gear wheel through a connecting piece. For example, the motor speed measurement feedback device and the motor having the motor speed measurement feedback device provided by the Chinese patent publication number CN104022589B, the motor speed measurement feedback device of the above patent includes a rotor shaft and a magnet assembly connected to the rotor shaft, the magnet assembly includes a bracket and a magnet connected to the bracket, the bracket is sleeved on the rotor shaft, and an axial limiting structure and a radial limiting structure are provided between the bracket and the rotor shaft; the bracket has a cavity for the rotor shaft to extend into, an opening connected to the cavity and an inner bottom surface opposite to the opening, when the rotor shaft extends into the cavity from the opening, the end of the rotor shaft faces the inner bottom surface, the axial limiting structure The bracket includes a snap-fit ​​portion provided on the bracket and an annular groove provided on the rotor shaft, the annular groove is provided on the outer peripheral wall of the rotor shaft and is arranged along the circumference of the rotor shaft, and the snap-fit ​​portion is provided on the side wall of the cavity and is clamped in the annular groove; the radial limiting structure includes a protrusion provided on the bracket and a longitudinal groove provided on the rotor shaft, the longitudinal groove is provided on the outer side of the rotor shaft and is arranged along the axial direction of the rotor shaft; the cross-sectional size of the longitudinal groove gradually decreases from the end of the rotor shaft to the direction away from the end of the rotor shaft, so that the bracket is easily put on the rotor shaft, and as the bracket is put on the rotor shaft, the protrusion is tightly clamped with the longitudinal groove, and the annular groove is clamped with the snap-fit ​​portion.

[0006] It can be seen that the structure of the above-mentioned feedback device is too complicated, and the outside of the feedback device also has a structure for connecting to the motor, which makes the feedback device not only complicated and costly, but also requires high matching when connecting the feedback device to the motor. Summary of the Invention

[0007] The purpose of the present invention is to provide a gear assembly for a motor with high stability and compact structure in order to solve the above problems in the prior art.

[0008] The purpose of this utility model can be achieved through the following technical solutions:

[0009] A gear assembly for a motor, characterized in that the assembly includes a gear and a feedback magnet, the gear including a body and a meshing portion, the body being cylindrical, the meshing portion being a plurality of teeth uniformly distributed circumferentially on the outside of the middle portion of the body, one end of the body being a connecting end for connecting to a motor shaft, the other end of the body having a mounting portion, the feedback magnet being embedded in the mounting portion and the two being tightly fitted and connected, the feedback magnet being used to detect the position of the motor rotor and output a corresponding signal.

[0010] In the gear assembly of the motor described above, the teeth of the meshing portion are straight teeth or helical teeth.

[0011] In the gear assembly of the above-mentioned motor, the meshing portion is a multi-stage gear on the body.

[0012] In the gear assembly of the motor described above, the connection end is an internal threaded structure at a port inside the body.

[0013] In the gear assembly of the motor, the mounting portion is a stepped seat recessed at the inner port of the body, and the feedback magnet matches the stepped seat and is tightly connected to the stepped seat.

[0014] In the gear assembly of the motor, the body and the meshing portion are an integrated structure and are made of plastic material, and the feedback magnet is tightly fitted and connected to the mounting portion of the body.

[0015] In the gear assembly of the above-mentioned motor, the feedback magnet is fixed to the mounting portion of the body by glue.

[0016] In the gear assembly of the motor described above, the wall thickness of the body is A, and the wall thickness of the mounting portion is B, and A is greater than B.

[0017] In the gear assembly of the above-mentioned motor, B is 1 / 2-3 / 4 of A.

[0018] Compared with the existing technology, the feedback magnet in the gear assembly of this motor is directly connected to the body of the gear, reducing the additional installation position and space occupied by the feedback magnet, which greatly optimizes the motor function and saves motor space.

[0019] At the same time, as a standard part, the feedback magnet does not need to be provided with a connection structure on the feedback magnet. The mounting portion on the gear body is adapted to the feedback magnet, thereby ensuring that the feedback magnet can be stably connected to the gear. Not only is its stability relatively high, but its structure is also relatively compact, and it has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the connection between the gear assembly of the motor and the motor.

[0021] Figure 2 It is a three-dimensional structural diagram of the gear assembly of this motor.

[0022] Figure 3 It is a schematic cross-sectional view of the gear assembly of this motor.

[0023] In the figure, 1, gear; 1a, body; 1a1, connection end; 1a2, mounting portion; 1b, meshing portion; 2, feedback magnet; 3, motor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that when a component is referred to as being "mounted on" another component, it may be mounted directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figure 1 and Figure 2 and Figure 3 As shown, the gear assembly of the motor includes a gear 1 and a feedback magnet 2. The gear 1 includes a body 1a and a meshing portion 1b. The body 1a is cylindrical. The meshing portion 1b is a plurality of teeth uniformly distributed circumferentially on the outside of the middle part of the body 1a. One end of the body 1a is a connection end for connecting to the rotating shaft of the motor 3. The other end of the body 1a has a mounting portion 1a2. The feedback magnet 22 is embedded in the mounting portion 1a2 and the two are tightly fitted. The feedback magnet 2 is used to detect the position of the motor rotor and output a corresponding signal.

[0028] The body 1 a of the gear 1 serves to connect with the rotating shaft of the motor 3 and to position the feedback magnet 2 , and the meshing portion 1 b serves to transmit power.

[0029] It can be seen that the assembly is completed by connecting the mounting portion 1a2 on the gear 1 to the feedback magnet 2. The assembly operation is simple and the entire gear assembly structure is compact.

[0030] The teeth of the meshing portion 1b are straight teeth or helical teeth. According to actual conditions, the meshing portion 1b can also be a multi-stage gear on the body 1a.

[0031] The connecting end 1a1 is a structure of an internal thread at an inner port of the body 1a. Of course, after the rotating shaft of the motor 3 is embedded in the connecting end 1a1, the body 1a and the rotating shaft of the motor 3 are threadedly connected to achieve a firm connection.

[0032] The mounting portion 1a2 is a stepped seat recessed at an inner port of the body 1a. The feedback magnet 2 matches the stepped seat and is tightly fitted and connected to the stepped seat.

[0033] The feedback magnet and the body 1a can be stably connected by adopting a tight fit or interference fit.

[0034] The body 1 a and the engaging portion 1 b are an integrated structure and are made of plastic material. The feedback magnet 2 is tightly fitted and connected to the mounting portion 1 a 2 of the body 1 a .

[0035] When the gear 1 is injection molded, the feedback magnet 2 is placed in the injection mold. After the injection molding is completed, the feedback magnet 2 is connected to the gear 1, and there is no need to connect the feedback magnet 2 later.

[0036] In addition to injection molding connection, direct glue connection is also feasible, that is, the feedback magnet 2 is fixed to the mounting portion 1a of the body 1a by glue.

[0037] The feedback magnet 2 and the body 1 a can be stably fixed together by glue.

[0038] The wall thickness of the main body 1a is A, and the wall thickness of the mounting portion 1a2 is B, where A is greater than B.

[0039] In this embodiment, B is 1 / 2 of A. According to actual conditions, the above ratio can also be 3 / 4. Such a structure ensures that the entire body has sufficient strength while stably arranging the mounting portion on the body.

[0040] The feedback magnet in the gear assembly of this motor is directly connected to the body of the gear, which reduces the additional installation position and space occupied by the feedback magnet, thus greatly optimizing the motor function and saving motor space.

[0041] At the same time, as a standard part, the feedback magnet does not need to be provided with a connection structure on the feedback magnet. The mounting portion on the gear body is adapted to the feedback magnet, thereby ensuring that the feedback magnet can be stably connected to the gear. Not only is its stability relatively high, but its structure is also relatively compact, and it has high practical value.

[0042] The various technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments fall within the scope of protection claimed by the present invention.

Claims

1. A gear assembly of a motor, characterized in that: This component includes a gear and a feedback magnet. The gear includes a body and a meshing portion. The body is cylindrical. The meshing portion is a plurality of teeth uniformly distributed circumferentially on the outside of the middle part of the body. One end of the body is a connecting end for connecting to the motor shaft, and the other end of the body has a mounting portion. The feedback magnet is embedded in the mounting portion and the two are tightly fitted and connected. The feedback magnet is used to detect the position of the motor rotor and output a corresponding signal.

2. The gear assembly of the motor according to claim 1, characterized in that: The teeth of the meshing portion are straight teeth or helical teeth.

3. The gear assembly of the motor according to claim 1, characterized in that: The meshing portion is a multi-stage gear on the body.

4. The gear assembly of the motor according to claim 2, characterized in that: The connecting end is a structure with internal threads at the port inside the body.

5. The gear assembly of the motor according to claim 4, characterized in that: The mounting portion is a stepped seat recessed at the inner port of the body. The feedback magnet matches the stepped seat and is tightly fitted and connected to the stepped seat.

6. The gear assembly of the motor according to claim 5, characterized in that: The body and the engaging portion are of an integrated structure and made of plastic material, and the feedback magnet is tightly fitted and connected to the mounting portion of the body.

7. The gear assembly of the motor according to claim 6, characterized in that: The feedback magnet is fixedly connected to the mounting portion of the main body by glue.

8. The gear assembly of the motor according to claim 5, characterized in that: The feedback magnet is fixedly connected to the mounting portion of the main body by glue.

9. The gear assembly of the motor according to claim 8, characterized in that: The wall thickness of the main body is A, and the wall thickness of the mounting portion is B, where A is greater than B.

10. The gear assembly of the motor according to claim 9, characterized in that: The B is 1 / 2-3 / 4 of A.

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