Brush holder structure of micro motor

Abstract

The utility model relates to a brush holder structure of a micro motor, and belongs to the technical field of micro motors. Comprising a brush holder fixing plate, a micro motor main part fixedly installed on the lower surface of the brush holder fixing plate, a connecting plate assembly fixedly installed on an output shaft of the micro motor main part and a connecting plate which is connected to the output shaft of the micro motor main part in a sleeving mode and is fixed through the connecting plate assembly, and a rotating column is fixedly installed on the upper surface of the connecting plate; a mounting sleeve is arranged outside the rotary column, and the mounting sleeve is provided with a mounting structure abutting against the outer surface of the rotary column; the mounting structure comprises two abutting blocks symmetrically arranged on the mounting sleeve and an elastic telescopic structure fixedly mounted in the mounting sleeve. According to the brush holder structure of the micro motor, the motor is started, the lead screw rotates to drive the adjusting sleeve to extend into the first cavity, and the reset spring is extruded through the pressurizing plate, so that the reset spring is pressurized, pressure adjustment is performed, and the brush holder structure of the micro motor has the advantages of being high in practicability and capable of pressurizing the spring.

Description

Technical Field

[0001] The utility model relates to the technical field of micro motors, in particular to a brush holder structure of a micro motor. Background Art

[0002] Micro motors are a type of electric motors with small size and capacity, and output power generally below several hundred watts. They are used in car wipers and are also called wiper motors. Wiper motors are mainly composed of a motor part and a brush holder part. The brush holder acts as a linkage for the two wipers of the car. When the brush motor is connected to the motor and is running, the middle part of the brush holder rotates in a circle along the motor output shaft, causing its two ends to swing left and right, thereby driving the wipers to operate. The brush holder is mainly composed of two linkage shafts and a connecting plate.

[0003] After searching, announcement number CN220374471 U discloses a brush holder device for a micro motor, including a fixed plate, a micro motor main part is fixedly installed at the bottom of the fixed plate, the output shaft of the micro motor main part passes through the fixed plate to the top and is connected to a connecting plate assembly, the connecting plate assembly is connected to two linkage shafts through a rotary column, two annular grooves are provided on the side wall of the rotary column, and the linkage shaft includes a main shaft rod. The utility model can fix the linkage shaft on the connecting plate assembly through the cooperation of the pin plate and the annular groove on the side wall of the rotary column, and when disassembling and assembling, the linkage shaft can be quickly disassembled and assembled by only turning the toggle button, which is convenient for maintenance and replacement, and the operation is simple and quick, making the brush holder device easier to operate in terms of maintenance.

[0004] However, the brush holder device of the micro motor of the utility model lacks a structure for pressurizing the spring. Since the spring will deform with the increase of time and the number of uses during use, the elasticity of the spring will deteriorate. When the elasticity of the spring deteriorates, its stretching, compression or torsion forces become difficult to control, which will cause the deformation performance of the spring to decline or fail, and therefore cannot meet the use requirements. Therefore, a brush holder structure of a micro motor is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a brush holder structure for a micro motor, which has the advantages of being highly practical and capable of pressurizing a spring, thereby solving the problem that the performance of the spring is easily degraded.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a brush holder structure of a micro motor, comprising a brush holder fixing plate, a micro motor main part fixedly mounted on the lower surface of the brush holder fixing plate, a connecting plate assembly fixedly mounted on the output shaft of the micro motor main part, and a connecting plate sleeved on the output shaft of the micro motor main part and fixed by the connecting plate assembly, a rotating column fixedly mounted on the upper surface of the connecting plate, a mounting sleeve arranged outside the rotating column, and a mounting structure abutting against the outer surface of the rotating column arranged on the mounting sleeve;

[0007] The mounting structure comprises two abutment blocks symmetrically arranged on the mounting sleeve, an elastic telescopic structure fixedly installed inside the mounting sleeve, and a connecting piece fixedly installed on one side of the elastic telescopic structure and connected to one of the abutment blocks;

[0008] The elastic telescopic structure includes a telescopic sleeve and a telescopic rod that are telescopically connected, a return spring arranged inside the telescopic sleeve and fixedly connected to one end of the telescopic rod, a motor arranged inside the telescopic sleeve, a lead screw fixedly mounted on an output shaft of the motor, an adjustment sleeve threadedly connected to the outside of the lead screw, and a pressure plate welded to one end of the adjustment sleeve and fixed to a side of the return spring away from the telescopic rod.

[0009] Furthermore, a sleeve groove is provided inside the installation sleeve, a through hole matching the sleeve groove is provided inside the installation sleeve, and an abutment block close to the elastic telescopic structure extends into the interior of the installation sleeve through the through hole, while another abutment block is fixedly installed on the inner wall opposite to the sleeve groove.

[0010] Furthermore, the connecting piece is composed of a convex block and a connecting block, the convex block and the connecting block are welded on opposite sides, and the side of the convex block away from the connecting block is connected and fixed to the outer wall of the abutment block extending to the inside of the mounting sleeve, the end of the telescopic rod away from the telescopic sleeve is connected and fixed to the outer wall of the connecting block, and a lever extending to the outside of the mounting sleeve is welded on the outer wall of the convex block.

[0011] Furthermore, a limiting rod penetrating the interior of the connecting block is fixedly installed inside the installation sleeve, and an end portion of the limiting rod is clamped with a limiting ring.

[0012] Furthermore, a first cavity and a second cavity are formed inside the telescopic sleeve, and a partition is installed between the first cavity and the second cavity. A through hole is formed inside the partition, and the adjustment sleeve extends into the first cavity through the through hole.

[0013] Furthermore, the motor is fixedly mounted on the inner wall of the second cavity by means of bolts, and a guide rod penetrating the interior of the partition is fixedly mounted on one side of the pressure plate close to the second cavity.

[0014] Furthermore, a main shaft rod is fixedly mounted on a side of the mounting sleeve away from the rotating column, and a sliding rod extending to the outside of the telescopic sleeve is welded to the outer surface of the telescopic rod.

[0015] Compared with the prior art, the utility model provides a brush holder structure of a micro motor, which has the following beneficial effects:

[0016] 1. The brush holder structure of the micro motor starts the motor, and the screw rotates to drive the adjustment sleeve to extend into the first cavity and squeeze the reset spring through the pressure plate, thereby pressurizing the reset spring to adjust the pressure, thereby achieving the advantages of strong practicality and being able to pressurize the spring, etc., solving the problem that the performance of the spring is easily reduced.

[0017] 2. The brush holder structure of the micro motor is installed through the guide rod to limit the pressure plate, ensure the linear displacement of the pressure plate, stabilize the pressure on the return spring, and install the limit rod to make the abutment block linearly displaced, thereby improving the fitting effect of rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a top view of the structure of the utility model;

[0019] Figure 2 This is a structural sectional view of the installation sleeve of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the elastic telescopic structure of the utility model;

[0021] Figure 4 For this utility model Figure 3 A is a schematic diagram of the enlarged structure shown.

[0022] In the figure: 1. brush holder fixing plate; 2. micro motor main part; 3. connecting plate assembly; 4. connecting plate; 5. swivel column; 6. mounting sleeve; 7. main shaft rod; 8. sleeve groove; 9. abutment block; 10. elastic telescopic structure; 1001. telescopic sleeve; 1002. telescopic rod; 1003. first cavity; 1004. second cavity; 1005. partition; 1006. reset spring; 1007. motor; 1008. lead screw; 1009. adjusting sleeve; 1010. pressure plate; 1011. guide rod; 1012. slide rod; 11. convex block; 12. connecting block; 13. lever; 14. limit rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments 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 creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] See also Figure 1-4A brush holder structure of a micro motor comprises a brush holder fixing plate 1, a micro motor main part 2 fixedly mounted on the lower surface of the brush holder fixing plate 1, a connecting plate assembly 3 fixedly mounted on the output shaft of the micro motor main part 2, and a connecting plate 4 sleeved on the output shaft of the micro motor main part 2 and fixed through the connecting plate assembly 3, a swivel post 5 is fixedly mounted on the upper surface of the connecting plate 4, a mounting sleeve 6 is arranged on the outside of the swivel post 5, and the mounting sleeve 6 is provided with a mounting structure abutting against the outer surface of the swivel post 5; the mounting structure comprises two abutment blocks 9 symmetrically arranged on the mounting sleeve 6, an elastic telescopic structure 10 fixedly mounted inside the mounting sleeve 6, and a connecting member fixedly mounted on one side of the elastic telescopic structure 10 and connected to one of the abutment blocks 9; a main shaft rod 7 is fixedly mounted on the side of the mounting sleeve 6 away from the swivel post 5.

[0026] Among them, the elastic telescopic structure 10 includes a telescopic sleeve 1001 and a telescopic rod 1002 that are telescopically connected, a return spring 1006 arranged inside the telescopic sleeve 1001 and fixedly connected to one end of the telescopic rod 1002, a motor 1007 arranged inside the telescopic sleeve 1001, a screw 1008 fixedly installed on the output shaft of the motor 1007, an adjustment sleeve 1009 threadedly connected to the outside of the screw 1008, and a pressure plate 1010 welded to one end of the adjustment sleeve 1009 and fixed to the side of the return spring 1006 away from the telescopic rod 1002.

[0027] In this embodiment, a sleeve groove 8 is opened inside the mounting sleeve 6, a through opening matching the sleeve groove 8 is opened inside the mounting sleeve 6, and an abutment block 9 close to the elastic telescopic structure 10 extends into the interior of the mounting sleeve 6 through the through opening, while another abutment block 9 is fixedly installed on the inner wall opposite to the sleeve groove 8.

[0028] It should be noted that the connecting piece is composed of a convex block 11 and a connecting block 12, and the convex block 11 and the connecting block 12 are welded on opposite sides, and the side of the convex block 11 away from the connecting block 12 is connected and fixed to the outer wall of the abutment block 9 extending to the inside of the mounting sleeve 6, and the end of the telescopic rod 1002 away from the telescopic sleeve 1001 is connected and fixed to the outer wall of the connecting block 12, and a lever 13 extending to the outside of the mounting sleeve 6 is welded on the outer wall of the convex block 11, which is used to move the abutment block 9 extending to the inside of the mounting sleeve 6.

[0029] In this embodiment, a limit rod 14 penetrating the connection block 12 is fixedly installed inside the installation sleeve 6, and a limit ring is clamped at the end of the limit rod 14. An annular groove is provided inside the rotating column 5 so that the two abutment blocks 9 fit the outer wall of the rotating column 5.

[0030] In this embodiment, the telescopic sleeve 1001 has a first cavity 1003 and a second cavity 1004, and a partition 1005 is installed between the first cavity 1003 and the second cavity 1004. The partition 1005 has a through hole, and the adjustment sleeve 1009 extends into the first cavity 1003 through the through hole. The motor 1007 is fixed to the inner wall of the second cavity 1004 by bolts.

[0031] The outer surface of the telescopic rod 1002 is welded with a sliding rod 1012 extending to the outside of the telescopic sleeve 1001 .

[0032] Embodiment 2:

[0033] See also Figure 4 On the basis of the first embodiment, a guide rod 1011 penetrating the interior of the partition 1005 is fixedly installed on the side of the pressure plate 1010 close to the second cavity 1004. The outer portion of the guide rod 1011 can be snapped into a limiting collar to limit the pressure plate 1010.

[0034] By adopting the above technical solution, the pressure plate 1010 is limited, the linear displacement of the pressure plate 1010 is guaranteed, and the pressure on the return spring 1006 is stabilized.

[0035] The working principle of the above embodiment is:

[0036] When in use, one of the abutment blocks 9 is moved by the lever 13, and the abutment block 9 extends into the installation sleeve 6 and squeezes the elastic telescopic structure 10. Then the installation sleeve 6 is sleeved in the annular groove on the side wall of the rotating column 5, and the movement of the lever 13 is loosened. At this time, the other abutment block 9 is close to the rotating column to realize the installation of the main shaft rod 7. The motor 1007 drives the screw 1008 to rotate. The rotation of the screw 1008 drives the adjustment sleeve 1009 to extend into the first cavity 1003 and squeeze the reset spring 1006 through the pressure plate 1010, thereby pressurizing the reset spring 1006, thereby adjusting the pressure and improving the installation effect of the main shaft rod 7.

[0037] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brush holder structure of a micro motor, comprising a brush holder fixing plate (1), a micro motor main part (2) fixedly mounted on the lower surface of the brush holder fixing plate (1), a connecting plate assembly (3) fixedly mounted on the output shaft of the micro motor main part (2), and a connecting plate (4) sleeved on the output shaft of the micro motor main part (2) and fixed by the connecting plate assembly (3), characterized in that: A swivel post (5) is fixedly mounted on the upper surface of the connecting plate (4), a mounting sleeve (6) is arranged outside the swivel post (5), and the mounting sleeve (6) is provided with a mounting structure that abuts against the outer surface of the swivel post (5); The mounting structure comprises two abutment blocks (9) symmetrically arranged on the mounting sleeve (6), an elastic telescopic structure (10) fixedly mounted inside the mounting sleeve (6), and a connecting piece fixedly mounted on one side of the elastic telescopic structure (10) and connected to one of the abutment blocks (9); The elastic telescopic structure (10) comprises a telescopic sleeve (1001) and a telescopic rod (1002) that are telescopically connected, a return spring (1006) disposed inside the telescopic sleeve (1001) and fixedly connected to one end of the telescopic rod (1002), a motor (1007) disposed inside the telescopic sleeve (1001), a lead screw (1008) fixedly mounted on an output shaft of the motor (1007), an adjustment sleeve (1009) threadedly connected to the outside of the lead screw (1008), and a pressure plate (1010) welded to one end of the adjustment sleeve (1009) and fixed to a side of the return spring (1006) away from the telescopic rod (1002).

2. The brush holder structure of a micro motor according to claim 1, characterized in that: The interior of the installation sleeve (6) is provided with a sleeve groove (8), the interior of the installation sleeve (6) is provided with a through opening adapted to the sleeve groove (8), and an abutment block (9) close to the elastic telescopic structure (10) extends into the interior of the installation sleeve (6) through the through opening, while another abutment block (9) is fixedly mounted on the inner wall opposite to the sleeve groove (8).

3. The brush holder structure of a micro motor according to claim 2, characterized in that: The connecting piece is composed of a convex block (11) and a connecting block (12); the convex block (11) and the connecting block (12) are welded on opposite sides; the side of the convex block (11) away from the connecting block (12) is connected and fixed to the outer wall of an abutment block (9) extending to the inside of the mounting sleeve (6); the end of the telescopic rod (1002) away from the telescopic sleeve (1001) is connected and fixed to the outer wall of the connecting block (12); and a lever (13) extending to the outside of the mounting sleeve (6) is welded on the outer wall of the convex block (11).

4. The brush holder structure of a micro motor according to claim 3, characterized in that: A limiting rod (14) penetrating the interior of the connecting block (12) is fixedly installed inside the installation sleeve (6), and the end of the limiting rod (14) is clamped with a limiting ring.

5. The brush holder structure of a micro motor according to claim 1, characterized in that: The telescopic sleeve (1001) is provided with a first cavity (1003) and a second cavity (1004) inside, and a partition (1005) is installed between the first cavity (1003) and the second cavity (1004), the partition (1005) is provided with a through hole inside, and the adjustment sleeve (1009) extends into the first cavity (1003) through the through hole.

6. The brush holder structure of a micro motor according to claim 5, characterized in that: The motor (1007) is fixedly mounted on the inner wall of the second cavity (1004) by means of bolts, and a guide rod (1011) penetrating the interior of the partition (1005) is fixedly mounted on one side of the pressure plate (1010) close to the second cavity (1004).

7. The brush holder structure of a micro motor according to claim 1, characterized in that: A main shaft rod (7) is fixedly mounted on the side of the mounting sleeve (6) away from the rotating column (5), and a sliding rod (1012) extending to the outside of the telescopic sleeve (1001) is welded on the outer surface of the telescopic rod (1002).

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