Direct-current gear motor
By introducing the connection structure of the carbon brush fixing plate and the fixing bracket in the DC reducer motor, and the fixing design of the end cap, the problem of insufficient stability of the permanent magnet DC reducer motor in the prior art is solved, and the high stability of the carbon brush assembly is achieved sexual connection improves overall reliability of use.
Patent Information
- Application Number
- CN202421053591.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-15
AI Technical Summary
Due to the lack of fixing parts, the existing permanent magnet DC reducer motors have insufficient stability during use.
A DC reducer motor is designed. By introducing a fixing plate and fixing bracket into the carbon brush assembly, the structure of connecting feet and fixing holes is used, combined with the design of fixing blocks and slots inside the end cap, the stability of the carbon brush assembly is enhanced. , and improve the overall insulation through an insulating sleeve.
It effectively improves the overall stability and connection stability of the carbon brush assembly, ensures that the carbon brush assembly has high stability during use, and avoids potential failures caused by instability.
Smart Images
Figure CN222282931U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motors and relates to a DC reduction motor. Background Art
[0002] A DC reduction motor, also known as a geared motor, is a conventional DC motor with a matching gearbox. The gearbox's function is to provide lower speeds and higher torques. Furthermore, different reduction ratios can provide varying speeds and torques.
[0003] The Chinese patent with announcement number CN205544771U discloses a permanent magnet DC reduction motor, including a stator assembly, a rotor assembly with a worm shaft, a carbon brush holder assembly, and a worm gear assembly. The carbon brush holder assembly is mounted on the worm shaft of the rotor assembly. The worm shaft is also mounted with a rolling bearing and a pull plate. The rolling bearing, pull plate and carbon brush holder assembly are installed in the stator assembly together with the rotor assembly. The pull plate is clamped in a pull plate fixing groove provided on the housing of the stator assembly. The worm gear assembly includes a front bracket, a worm gear with a pin shaft and a pressure plate. The front bracket is mounted on the worm shaft head and the end face of the front bracket is in contact with the end face of the stator assembly. The inner ring wall of the housing of the stator assembly is provided with a groove matching the boss. The side of the front bracket is provided with a accommodating cavity, and the bottom of the accommodating cavity is provided with an end cover bearing. The worm gear is installed in the accommodating cavity and the pin shaft of the worm gear is inserted into the hole of the end cover bearing.
[0004] In a permanent magnet DC reduction motor provided by this patent, a carbon brush holder assembly is mounted on the worm shaft of a rotor assembly and installed in a stator assembly. Due to the lack of fixing parts, the stability of this structure is not high enough during use. Utility Model Content
[0005] The purpose of the utility model is to provide a DC reduction motor to solve the above problems in the prior art.
[0006] The objectives of the utility model can be achieved through the following technical solutions: A DC reduction motor, including a casing, an end cover and a reduction box, a stator winding is installed inside the casing, a carbon brush assembly is fixed to one side of the stator winding, the carbon brush assembly includes a carbon brush fixing plate, a carbon brush and a carbon brush fixing bracket, an axial hole is formed in the middle of the stator winding, a motor shaft is passed through and fixed in the axial hole, the motor shaft extends out of the axial hole, a rotor and a motor bearing are fixed to one end of the motor shaft, the motor bearing is fixed to the outside of the rotor, a through hole is provided in the middle of the carbon brush fixing plate, the carbon brush fixing plate is sleeved on the outer periphery of the rotor through the through hole, a plurality of fixing holes are provided on the carbon brush fixing plate, a connecting foot is formed on the carbon brush fixing bracket, the connecting foot passes through the fixing hole, the carbon brush is fixed to the inside of the carbon brush fixing bracket, and the end cover is fixed to one side of the casing and sleeved on the outside of the carbon brush assembly.
[0007] In the above-mentioned DC reduction motor, a plurality of fixing blocks are integrally formed inside the end cover, a fixing groove is formed in the fixing block, and a plurality of fixing columns are fixed on the carbon brush fixing plate, and the fixing columns are inserted into the fixing groove.
[0008] In the above-mentioned DC reduction motor, one side of the carbon brush is a curved surface, the curvature of the curved surface on one side of the carbon brush is the same as the curvature of the outer peripheral surface of the rotor, and the one side of the carbon brush is tightly fitted to the outer peripheral surface of the rotor.
[0009] In the above-mentioned DC reduction motor, an insulating sleeve is provided on the outer side of the motor bearing, and the insulating sleeve is in a cover shape.
[0010] In the above-mentioned DC reduction motor, the reduction box is fixed to one side of the casing, a reduction gear is fixed in the reduction box, and the reduction gear is meshed with one end of the motor shaft.
[0011] Compared with the prior art, the DC reduction motor provided by the utility model has the following beneficial effects: through the connection between the connecting feet of the carbon brush fixing bracket in the carbon brush assembly and the fixing holes of the carbon brush fixing plate, the overall stability of the carbon brush assembly is effectively stabilized; through the connection between the fixing column on the carbon brush fixing plate and the fixing groove inside the end cover, the connection stability between the carbon brush assembly and the motor is stabilized. The carbon brush assembly of the utility model has the advantage of high stability when in use. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 This is a schematic diagram of the explosion structure of the utility model;
[0014] Figure 3 This is a schematic diagram of the structure of the utility model after removing the end cover;
[0015] Figure 4 is a schematic diagram of the end cover structure;
[0016] Figure 5 It is a schematic diagram of the carbon brush assembly structure.
[0017] In the figure: 1. Casing; 11. Stator winding; 12. Motor shaft; 13. Rotor; 14. Motor bearing; 15. Insulation sleeve; 2. End cover; 21. Fixing block; 22. Fixing groove; 3. Reducer; 31. Reduction gear; 4. Carbon brush assembly; 41. Carbon brush fixing plate; 411. Through hole; 412. Fixing hole; 413. Fixing column; 42. Carbon brush; 43. Carbon brush fixing bracket; 431. Connecting foot. DETAILED DESCRIPTION
[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0019] like Figures 1 to 3 As shown, this embodiment includes a casing 1, an end cover 2 and a reduction gearbox 3. A stator winding 11 is installed inside the casing 1. The carbon brush assembly 4 includes a carbon brush fixing plate 41, a carbon brush 42 and a carbon brush fixing bracket 43. The carbon brush assembly 4 is fixed to one side of the stator winding 11. The motor shaft 12 is passed through and fixed in the shaft hole formed in the middle of the stator winding 11 and the motor shaft 12 extends out of the shaft hole. A rotor 13 and a motor bearing 14 are fixed to one end of the motor shaft 12. The motor bearing 14 is fixed to the outside of the rotor 13. An insulating sleeve 15 is provided on the outside of the motor bearing 14. The insulating sleeve 15 is in a cover shape and wraps the motor bearing 14. The insulating sleeve 15 plays a role in improving the insulation of this embodiment. A through hole 411 is opened in the middle of the carbon brush fixing plate 41. The carbon brush fixing plate 41 is sleeved on the through hole 411. At the outer periphery of the rotor 14, a plurality of fixing holes 412 are provided on the carbon brush fixing plate 41, and a connecting foot 431 is formed on the carbon brush fixing bracket 43. The connecting foot 431 passes through the fixing hole 412 to fix the carbon brush fixing bracket 43 to the carbon brush fixing plate 41. The carbon brush 42 is fixed inside the carbon brush fixing bracket 43, and the carbon brush fixing bracket 43 clamps the carbon brush 42. The end cover 2 is fixed to one side of the casing 1 and is sleeved on the outside of the carbon brush assembly 4. A plurality of fixing blocks 21 are integrally formed inside the end cover 2, and a fixing groove 22 is provided in the fixing block 21. A plurality of fixing columns 413 are fixed on the carbon brush fixing plate 4. By inserting the fixing column 413 into the fixing groove 22, the carbon brush assembly 4 is fixed to the end cover 2, and the end cover 2 is fixed to the casing 1 so that the carbon brush assembly 4 is fixed and stable.
[0020] To elaborate further, Figures 2 to 3 As shown, the through hole 411 in the carbon brush fixing plate 41 has no contact with the rotor 13 , and a gap between the through hole 411 in the carbon brush fixing plate 41 and the rotor 13 is 3 mm to 5 mm.
[0021] To elaborate further, Figure 5 As shown, one side of the carbon brush 42 is a curved surface, and the curvature of the curved surface on one side of the carbon brush 42 is the same as the curvature of the outer peripheral surface of the rotor 13, so that one side of the carbon brush 42 is tightly fitted with the outer peripheral surface of the rotor 13. This structure not only makes the connection between the carbon brush 42 and the rotor 13 more stable, but also improves the conduction effect of the carbon brush 42 on the rotor 13.
[0022] To elaborate further, Figure 2 As shown, the reduction box 3 is fixed to one side of the casing 1, and the reduction gear 1 is fixed in the reduction box 3. The end of the motor shaft 12 close to the reduction box 3 is meshing, and the reduction gear 31 is meshingly connected with one end of the motor shaft 1. The operation of the motor shaft 12 can drive the reduction gear 31 to rotate, and the reduction gear 31 has the function of deceleration control on the motor shaft 12.
[0023] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.
[0024] Although various terms are used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.
Claims
1. A DC reduction motor, comprising a housing (1), an end cover (2) and a reduction box (3), wherein a stator winding (11) is installed inside the housing (1), and a carbon brush assembly (4) is fixed to one side of the stator winding (11), characterized in that: The carbon brush assembly (4) comprises a carbon brush fixing plate (41), a carbon brush (42) and a carbon brush fixing bracket (43); an axial hole is formed in the middle of the stator winding (11); a motor shaft (12) is fixedly passed through the axial hole; the motor shaft (12) extends out of the axial hole; a rotor (13) and a motor bearing (14) are fixed to one end of the motor shaft (12); the motor bearing (14) is fixed to the outside of the rotor (13); a through hole (41) is opened in the middle of the carbon brush fixing plate (41); 1), the carbon brush fixing plate (41) is sleeved on the outer periphery of the rotor (13) through a through hole (411), a plurality of fixing holes (412) are formed on the carbon brush fixing plate (41), a connecting foot (431) is formed on the carbon brush fixing bracket (43), the connecting foot (431) passes through the fixing hole (412), the carbon brush (42) is fixed inside the carbon brush fixing bracket (43), and the end cover (2) is fixed to one side of the housing (1) and sleeved on the outside of the carbon brush assembly (4).
2. A DC reduction motor according to claim 1, characterized in that: A plurality of fixing blocks (21) are integrally formed inside the end cover (2), a fixing groove (22) is provided in the fixing block (21), a plurality of fixing columns (413) are fixed on the carbon brush fixing plate (41), and the fixing columns (413) are inserted into the fixing grooves (22).
3. A DC reduction motor according to claim 1, characterized in that: One side of the carbon brush (42) is a curved surface, the curvature of the curved surface on one side of the carbon brush (42) is the same as the curvature of the outer peripheral surface of the rotor (13), and one side of the carbon brush (42) is tightly fitted to the outer peripheral surface of the rotor (13).
4. A DC reduction motor according to claim 1, characterized in that: An insulating sleeve (15) is sleeved on the outer side of the motor bearing (14), and the insulating sleeve (15) is in a cover shape.
5. A DC reduction motor according to claim 1, characterized in that: The reduction box (3) is fixed to one side of the housing (1), a reduction gear (31) is fixed inside the reduction box (3), and the reduction gear (31) is meshed with one end of the motor shaft (12).