Middle plate of brush motor and brush motor
By setting a stop post in the brushed motor to physically limit the spring, the problem of spring displacement under external impact is solved, stable contact between the carbon brush and the commutator is achieved, and the motor's impact resistance is improved.
Patent Information
- Application Number
- CN202520757972.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-21
AI Technical Summary
In traditional brushed motors, the springs are prone to displacement under severe external impact, which can lead to unstable or disengaged contact pressure between the carbon brushes and the commutator, affecting the motor's performance.
A stop post is set on the outside of the brush box of the carbon brush assembly to form a physical limit on the spring. The displacement of the spring body and the spring foot is restricted by the first and second limiting surfaces, respectively, thereby enhancing the impact resistance.
Ensure stable contact between the carbon brush and the commutator to improve the motor's shock resistance and maintain normal motor operation.
Smart Images
Figure CN223957418U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of brush motor, especially to a middle plate of brush motor and brush motor with the middle plate. BACKGROUND
[0002] Brush motor is a rotating motor containing brush device to convert electric energy into mechanical energy. When the motor works, the coil and commutator rotate, and the magnetic steel and carbon brush do not rotate. The alternating change of the coil current direction is completed by the commutator and carbon brush rotating with the motor. Brush motor is the basis of all motors, which has the characteristics of fast starting, timely braking, smooth speed regulation in a wide range, relatively simple control circuit, etc.
[0003] The traditional motor brush box structure has obvious defects when subjected to severe external force impact: the spring is easy to displace, resulting in unstable contact pressure between the carbon brush and the commutator or even complete disengagement, which seriously affects the motor performance. UTILITY MODEL CONTENTS
[0004] The utility model aims at overcoming the defects of the prior art and provides a middle plate of brush motor and brush motor.
[0005] To solve the above technical problems, the utility model provides the following technical scheme: a middle plate of brush motor, comprising a plate surface for component installation, a carbon brush assembly comprising a spring column, a brush box, a spring and a carbon brush arranged on the plate surface, and a stop column arranged on the plate surface and outside the brush box; wherein the spring comprises a main body and a spring leg, the main body is sleeved on the spring column, the end of the spring leg abuts against the carbon brush in the brush box, and the stop column is used for physical limiting of the main body and the spring leg.
[0006] Preferably, the stop column comprises a first limiting surface and a second limiting surface; the first limiting surface is used for limiting the main body, and the second limiting surface is used for limiting the spring leg.
[0007] Preferably, a limiting groove is arranged on the plate surface, the spring column is located in the limiting groove, and the bottom of the spring is limited by the limiting groove.
[0008] Preferably, a reinforcing rib is arranged on the plate surface.
[0009] Preferably, a long strip block is arranged on the opposite surface of the plate surface, and the long strip block is used for marking the sticking position of the damping block.
[0010] Preferably, the plate surface comprises a shaft hole and a clamping groove; the shaft hole penetrates through the plate surface, at least one clamping groove is arranged on the side edge of the plate surface, the shaft hole is used for the passing of the commutator, and the clamping groove is used for the positioning installation of the wire protection sleeve.
[0011] Preferably, the plate surface is provided with a stud for fixing the power supply lead.
[0012] The utility model discloses still provide following technical scheme: a brush motor, including above -mentioned middle plate still include casing and motor assembly, the middle plate with motor assembly set up in the casing, the motor assembly includes stator, rotor and rotating shaft, commutator is sleeved on the rotating shaft and passes through axle hole, and the carbon brush is in contact with commutator, the casing with the rotating shaft passes through bearing cooperation installation.
[0013] The utility model discloses the beneficial effect: the blocking post is directly integrated in the brush box outside, forms the physical limit of spring, strengthens the anti -impact performance under the premise of not influencing the original function of brush box, solves the problem that the contact between carbon brush and commutator is not stable and completely separates because of spring displacement under the vibration and impact environment of traditional design structure, ensures the stable contact of carbon brush and commutator. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the whole structure schematic diagram of the middle plate of the utility model;
[0015] Figure 2 It is the structure schematic diagram of the relative position of the blocking post and spring of the utility model;
[0016] Figure 3 It is the structure schematic diagram of the long strip block of the utility model;
[0017] Figure 4 It is the whole structure schematic diagram of the middle plate for brush motor of the utility model;
[0018] Figure 5 It is the position structure schematic diagram of the damping block of the utility model;
[0019] Figure 6 It is the structure schematic diagram of the motor assembly in the brush motor of the utility model. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the following will combine the drawings in the utility model embodiment, and the technical scheme in the utility model embodiment is clearly and completely described.The described embodiment is a part of the embodiment of the utility model, not all the embodiment.
[0021] Example 1
[0022] The embodiment proposes a middle plate of brush motor, and the spring 203 is physically limited by the integrated blocking post 300, and the anti-impact performance is improved without changing the original layout of the brush box 202.
[0023] Referring to Figures 1-6 The middle plate includes a plate surface 100, a carbon brush assembly 200 and a stop column 300. Specifically, the plate surface 100 is used for mounting various components of the motor, and the carbon brush assembly 200 and the stop column 300 are both arranged on the plate surface 100. Through the arrangement of the stop column 300, the spring 203 in the carbon brush assembly 200 can be physically limited.
[0024] Further, the carbon brush assembly 200 in the embodiment includes a spring column 201, a brush box 202, a spring 203 and a carbon brush 204 arranged on the plate surface 100. The stop column 300 is arranged on the plate surface 100 and outside the brush box 202. The spring 203 includes a main body 203a and a spring foot 203b. The main body 203a is sleeved on the spring column 201, and the end of the spring foot 203b abuts against the carbon brush 204 in the brush box 202. The stop column 300 is used for physically limiting the main body 203a and the spring foot 203b.
[0025] As a preferred scheme of the embodiment, in order to improve the limiting effect, the stop column 300 includes a first limiting surface 301 and a second limiting surface 302. The first limiting surface 301 is used for limiting the main body 203a, and the second limiting surface 302 is used for limiting the spring foot 203b. When the main body 203a is unstable in a vibration and impact environment, the first limiting surface 301 abuts against the main body 203a to make it stable and not displace. At the same time, the second limiting surface 302 abuts against the spring foot 203b. Therefore, the double limiting in the embodiment makes the spring 203 more stable in the vibration and impact environment.
[0026] The main body 203a is sleeved on the spring column 201. In order to increase the bottom limiting of the main body 203a, the embodiment further includes a limiting groove 101 on the plate surface 100. The spring column 201 is located in the limiting groove 101, and the bottom of the spring 203 is limited by the limiting groove 101.
[0027] Further, in order to enhance the strength of the middle plate, the embodiment further includes a reinforcing rib 102 on the plate surface 100. In order to more accurately paste the damping block 400 on the opposite surface of the plate surface 100, the embodiment further includes a long strip 103 on the opposite surface of the plate surface 100. The long strip 103 is used for marking the pasting position of the damping block 400, facilitating the installation operation of the staff. That is, the damping block 400 cannot exceed the position marked by the long strip 103.
[0028] The plate surface 100 in the embodiment further includes a shaft hole 104, a clamping groove 105 and a wire column 106. Specifically, the shaft hole 104 penetrates the plate surface 100, at least one clamping groove 105 is arranged on the side edge of the plate surface 100, the shaft hole 104 is used for the passing of the commutator 500, and the clamping groove 105 is used for the positioning and installation of the wire protection sleeve 600. The plate surface 100 is provided with the wire column 106 used for fixing the power supply lead wire.
[0029] Embodiment 2
[0030] Referring again to the schematic of Figures 4-6 the embodiment, a brush motor is proposed, which comprises the middle plate described in the above embodiments, and further comprises a shell 700 and a motor assembly 800, the middle plate and the motor assembly 800 are arranged in the shell 700.
[0031] Further, more specifically, the plate surface 100 is provided as an installation base body, and is provided with a limiting groove 101, a reinforcing rib 102, an axle hole 104 and other functional structures, the carbon brush assembly 200 is composed of a spring column 201, a brush box 202, a spring 203 and a carbon brush 204. The main body 203a of the spring 203 is a conical spiral spring, and the end of the spring foot 203b is bent to abut against the carbon brush 204.
[0032] The spring 203 is sleeved on the spring column 201, the end of the spring foot 203b abuts against the carbon brush 204, the blocking column 300 is located outside the brush box 202, the spring main body 203a is constrained by the first limiting surface 301, and the transverse displacement of the spring foot 203b is limited by the second limiting surface 302.
[0033] The brush motor of the embodiment has the effects of impact resistance improvement, compact structure and convenient installation. The displacement of the spring 203 is directly limited by the blocking column 300, the pressure of the carbon brush 204 is ensured to be stable, and the impact resistance is improved; the structures such as the limiting groove 101 and the blocking column 300 are integrated, and no additional space is occupied, so that the structure is compact. The quick positioning is realized by the design of the clamping groove 105 and the long strip block 103, and the convenient installation is realized.
[0034] Further, the motor assembly 800 comprises a stator 801, a rotor 802 and a rotating shaft 803, the commutator 500 is sleeved on the rotating shaft 803 and passes through the axle hole 104, the carbon brush 204 abuts against the commutator 500; the shell 700 is installed in cooperation with the rotating shaft 803 through the bearing 804.
[0035] The connection relationship of the core structure of the middle plate in the embodiment is that the plate surface 100 is provided as an installation base body, the carbon brush assembly 200 and the blocking column 300 are arranged on the front surface of the plate surface 100, the limiting groove 101 is a groove and is located on the front surface of the plate surface 100, the spring column 201 is vertically inserted into the limiting groove 101 to limit the transverse deviation of the spring 203, and the reinforcing rib 102 is distributed along the plate surface 100 and can be integrally formed with the plate surface 100 to improve the overall strength.
[0036] The hierarchical connection of the carbon brush assembly 200 is that the spring column 201 is vertically inserted into the limiting groove 101 of the plate surface 100, the spring 203 is sleeved on the spring column 201, the end of the spring foot 203b abuts against the carbon brush 204, the brush box 202 is arranged on the plate surface 100, the blocking column 300 is arranged outside the brush box 202, the spring main body 203a is constrained by the first limiting surface 301, and the transverse displacement of the spring foot 203b is limited by the second limiting surface 302.
[0037] The brush box 202 can be a U-shaped structure, the brush box 202 is made of plastic, is located on the plate surface 100, and is integrally formed with the middle plate. The opening faces the shaft hole 104 at the center of the plate surface, and the inside accommodates the carbon brush 204. The spring column 201 is vertically erected in the limiting groove 101. The main body 203a of the spring 203 is sleeved on the outer wall of the spring column 201, and the bottom of the spring 203 is embedded in the limiting groove 101 and is limited in horizontal movement by the groove wall.
[0038] The spring foot 203b extends from the end of the main body 203a and is bent and formed. The end extends into the inside of the brush box 202 and abuts against the tail of the carbon brush 204, so as to push the carbon brush 204 to slide in the opening direction of the brush box 202.
[0039] The limiting effect of the blocking column 300 is that the blocking column 300 is arranged outside the brush box 202 and is spaced apart from the brush box 202 by a certain distance, thereby forming bidirectional constraint on the spring 203. The first limiting surface 301 can be an arc surface and is parallel to the outer wall of the main body 203a of the spring 203, thereby limiting the radial movement of the spring 203. The second limiting surface 302 is a vertical plane and is located on the side of the spring foot 203b, thereby preventing the lateral swing of the spring foot 203.
[0040] The connection between the middle plate and the shell 700 is that the outer edge of the middle plate is fixed to the inner wall of the shell 700. The shaft hole 104 is coaxially aligned with the bearing seat of the shell 700. The rotating shaft 803 passes through the shaft hole 104 and is supported on the shell 700 by the bearings 804 at both ends.
[0041] The dynamic contact between the carbon brush 204 and the commutator 500 is that the commutator 500 is sleeved on the rotating shaft 803 and rotates with the rotating shaft 803. The outer surface of the commutator 500 keeps sliding contact with the end of the carbon brush 204. The spring 203 continuously presses the carbon brush 204 through the spring foot 203b, so that the end of the carbon brush 204 tightly abuts against the surface of the commutator 500, thereby forming stable electrical connection.
[0042] It should be noted that the brushed motor in the embodiment is intended to embody the structure of the middle plate, that is, the integrated blocking column 300 physically limits the spring 203, thereby improving the impact resistance without changing the original layout of the brush box 202. The basic principles of the brushed motor, such as the working principle between the stator 801, the rotor 802 and the rotating shaft 803, the working principle between the commutator 500 and the carbon brush 204, the internal circuit, the arrangement of the line, and the like, all belong to very mature technology. Those skilled in the art can implement the existing technology, and the embodiment is intended to the structure of the middle plate in the motor. The above-mentioned basic principles of the brushed motor are non-essential technical features, and therefore are not described in detail.
[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the protection scope of the present application. For those skilled in the art, on the basis of the above description and ideas, other different forms of changes or variations can also be made, which do not need to be or cannot be exhausted here. Any modification, equivalent replacement and improvement made within the spirit and principles of the technical solutions of the present application shall be covered within the protection scope of the claims of the present application.
Claims
1. A middle plate of a brushed electric motor, characterized by: The utility model relates to a carbon brush assembly, including, A board surface (100) for component installation; A spring post (201), a brush box (202), a spring (203) and a carbon brush (204) are arranged on the board surface (100); A stop post (300) is located on the board surface (100) and is arranged outside the brush box (202); The spring (203) includes a main body (203a) and a spring foot (203b), the main body (203a) is sleeved on the spring post (201), the end of the spring foot (203b) is in contact with the carbon brush (204) in the brush box (202), and the stop post (300) is used for physical limiting of the main body (203a) and the spring foot (203b).
2. The brush motor middle plate according to claim 1, characterized in that: The stop post (300) includes a first limiting surface (301) and a second limiting surface (302); The first limiting surface (301) is used for limiting the main body (203a), and the second limiting surface (302) is used for limiting the spring foot (203b).
3. The brush motor mid plate of claim 1, wherein: A limiting groove (101) is arranged on the board surface (100), the spring post (201) is located in the limiting groove (101), and the bottom of the spring (203) is limited by the limiting groove (101).
4. The brush motor mid plate of claim 1, wherein: A reinforcing rib (102) is arranged on the board surface (100).
5. The brush motor mid plate of claim 1, wherein: A long strip block (103) is arranged on the opposite surface of the board surface (100), and the long strip block (103) is used for marking the sticking position of a damping block (400).
6. The brush motor mid plate of claim 1, wherein: The board surface (100) includes a shaft hole (104) and a clamping groove (105); The shaft hole (104) penetrates the board surface (100), at least one clamping groove (105) is arranged on the side edge of the board surface (100), the shaft hole (104) is used for the passing of a commutator (500), and the clamping groove (105) is used for the positioning installation of a wire sleeve (600).
7. The brush motor mid plate of claim 1, wherein: A wire post (106) for fixing a power supply lead is arranged on the board surface (100).
8. A brushed electric motor characterized by: The utility model relates to a carbon brush assembly, including, The middle plate and the motor assembly (800) are arranged in the shell (700); The motor assembly (800) includes a stator (801), a rotor (802) and a rotating shaft (803), a commutator (500) is sleeved on the rotating shaft (803) and passes through the shaft hole (104), and a carbon brush (204) is in contact with the commutator (500); The shell (700) and the rotating shaft (803) are matched and installed through a bearing (804).