Connecting mechanism of motor commutator with positioning function

Abstract

The utility model discloses a motor commutator connecting mechanism with a positioning function, which comprises a rotating shaft, one end of the rotating shaft is provided with a reducing end, the outside of the reducing end is provided with a spline used for limiting, the outside of the reducing end is provided with a commutator insulating sleeve, and the commutator insulating sleeve is provided with a spline used for limiting. A clamping groove is formed in the end, away from the rotating shaft, of the commutator insulating sleeve, a limiting sleeve is inserted into the end, away from the rotating shaft, of the commutator insulating sleeve, and the limiting sleeve is sleeved with a positioning ring which can abut against the end, away from the rotating shaft, of the commutator insulating sleeve and is used for positioning. The commutator insulation sleeve is positioned by the positioning ring, and the problem that a gap is generated between the commutator and the sleeve due to expansion caused by heat and contraction caused by cold after the commutator is heated, so that the commutator moves back and forth along the surface of the sleeve during working due to looseness is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor commutators, in particular to a connecting mechanism of a motor commutator with a positioning function. Background Art

[0002] The motor commutator is an important component in the motor and an indispensable part of the DC motor. The motor commutator realizes the periodic commutation of the current through the cooperation of copper plates and brushes, thereby controlling the rotation direction of the motor. This mechanism ensures that the motor can rotate continuously and smoothly. The commutator is widely used in various types of motors that need to frequently change the direction of rotation, such as power tools, household appliances, etc.

[0003] The patent document with announcement number CN221614790U discloses a motor commutator connection structure; it includes a support shaft and a rectifier, the support shaft is clamped with a sleeve, the outer wall of the sleeve is clamped with a rectifier, the end face of the rectifier away from the support shaft is clamped with a limit block, the limit block is interference-fitted with the sleeve, the limit block is connected to the support shaft, and the outer wall of the support shaft is connected with an electronic component that cooperates with the rectifier; the above structure is arranged to cooperate with the outer wall of the sleeve and the rectifier, and the inner wall of the sleeve and the support shaft, so that when installing, the rectifier and the sleeve are interference-fitted, the rectifier presses the sleeve, and then the inner wall of the sleeve is interference-fitted with the support shaft, thereby making the rectifier installation more stable; the rectifier is controlled by threading, so that the interference fit of the rectifier is controlled by screw connection, so that the rectifier installation is faster and more convenient, and distance debugging is also faster and more convenient, but there are still the following deficiencies:

[0004] The motor in the above-mentioned prior art generates heat during operation, and the commutator will expand and contract after being heated, resulting in a gap between the commutator and the sleeve, which causes looseness and further causes the commutator to move back and forth along the surface of the sleeve during operation. Therefore, a connection mechanism for a motor commutator with a positioning function is proposed to solve the above-mentioned problem. Utility Model Content

[0005] In response to the above problems, a connection mechanism for a motor commutator with a positioning function is provided, which is achieved by installing the commutator insulating sleeve on the outside of the reducing end, inserting one end of the limiting sleeve into the inside of the end of the commutator insulating sleeve away from the rotating shaft, then sleeve-fitting a positioning ring onto the outside of the limiting sleeve, and fixing the limiting sleeve to the outside of the reducing end through a tightening sleeve, while one end of the tightening sleeve abuts against the side of the positioning ring away from the commutator insulating sleeve, so that the positioning ring is docked with the end of the commutator insulating sleeve away from the rotating shaft, thereby realizing the positioning of the commutator insulating sleeve by the positioning ring, and solving the problem that the commutator is prone to thermal expansion and contraction after being heated, resulting in a gap between the commutator and the sleeve, thereby causing looseness and causing the commutator to move back and forth along the surface of the sleeve when working.

[0006] In order to solve the problems of the prior art, the utility model provides a connecting mechanism of a motor commutator with a positioning function, including a rotating shaft, a reducing end is provided at one end of the rotating shaft, a spline for limiting is provided on the outside of the reducing end, a commutator insulating sleeve is installed on the outside of the reducing end, a card slot is provided at the end of the commutator insulating sleeve away from the rotating shaft, and a limiting sleeve is inserted into the inside of the commutator insulating sleeve away from the end of the rotating shaft, and the outer sleeve of the limiting sleeve is provided with a positioning ring that can abut against the end of the commutator insulating sleeve away from the rotating shaft for positioning, and a tightening sleeve that can abut against one end of the positioning ring to prevent horizontal movement is rotatably installed on the outside of one end of the limiting sleeve, so as to facilitate the positioning of the commutator insulating sleeve by the positioning ring, and avoid the commutator from easily expanding and contracting after being heated, resulting in a gap between the commutator and the sleeve and loosening.

[0007] As a technical solution of the present invention, a plurality of elastic abutment blocks which can be engaged in the slots are equidistantly arranged on one side of the positioning ring, so that the positioning ring can fix the commutator insulating sleeve through the elastic abutment blocks to avoid displacement.

[0008] As a technical solution of the present invention, a tightening block that can be tightened is provided at one end of the limit sleeve away from the commutator insulating sleeve, and an external thread is provided on the outside of the tightening block, and a first internal thread is provided on the inside of the tightening block to abut against the surface of the reducing end to prevent displacement, so that the first internal thread can abut against the surface of the reducing end when the tightening block is tightened, thereby increasing the stability of the connection between the limit sleeve and the reducing end and preventing displacement.

[0009] As a technical solution of the present invention, the interior of the tightening sleeve is provided with a second internal thread that can engage with the external thread, so that the tightening sleeve can rotate and tighten the tightening block through the cooperation of the second internal thread and the external thread, thereby completing the fixing work of the limiting sleeve.

[0010] As a technical solution of the present invention, the commutator insulating sleeve is provided with a plurality of key slots adapted to the splines inside one end of the rotating shaft, so as to prevent the commutator insulating sleeve from rotating when installed outside the reducing end.

[0011] As a technical solution of the present invention, a plurality of commutator segments are equidistantly arranged on the outside of the commutator insulating sleeve, and a clamping block is provided at one end of the commutator segment close to the rotating shaft so that the commutator segment can be electrically connected to the motor coil through the clamping block.

[0012] As a technical solution of the present invention, a reserved groove for easy disassembly is provided on the outside of the tightening sleeve, so that the tightening sleeve can be disassembled and assembled more conveniently and quickly.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present application achieves this by installing the commutator insulating sleeve on the outside of the reducing end, inserting one end of the limiting sleeve into the inside of the end of the commutator insulating sleeve away from the rotating shaft, then sleeve-mounting the positioning ring on the outside of the limiting sleeve, and fixing the limiting sleeve on the outside of the reducing end through the tightening sleeve, while one end of the tightening sleeve abuts against the side of the positioning ring away from the commutator insulating sleeve, so that the positioning ring is docked with the end of the commutator insulating sleeve away from the rotating shaft, thereby realizing the positioning of the commutator insulating sleeve by the positioning ring, and solving the problem that the commutator is prone to thermal expansion and contraction after being heated, resulting in a gap between the commutator and the sleeve, thereby causing looseness and causing the commutator to move back and forth along the surface of the sleeve when working. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a three-dimensional diagram of a connection mechanism of a motor commutator with a positioning function.

[0016] Figure 2 The present invention is a top view of a connection mechanism of a motor commutator with a positioning function.

[0017] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle.

[0018] Figure 4 It is an exploded view of the connection mechanism of a motor commutator with a positioning function.

[0019] Figure 5 The present invention is a three-dimensional diagram of a commutator insulating sleeve in a connection mechanism of a motor commutator with a positioning function.

[0020] Figure 6 The present invention is a stereoscopic diagram of a positioning ring in a connection mechanism of a motor commutator having a positioning function.

[0021] Figure 7 The present invention is a three-dimensional diagram of a limiting sleeve in a connection mechanism of a motor commutator having a positioning function.

[0022] The numbers in the figure are: 1. rotating shaft; 11. reducing end; 12. spline; 2. commutator insulating sleeve; 21. keyway; 22. slot; 23. commutator segment; 24. block; 3. limiting sleeve; 31. tightening block; 32. external thread; 33. first internal thread; 4. positioning ring; 41. elastic abutment block; 5. tightening sleeve; 51. reserved groove; 52. second internal thread. DETAILED DESCRIPTION

[0023] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] See also Figure 1-Figure 7 As shown, a connection mechanism of a motor commutator with a positioning function includes a rotating shaft 1, a reducing end 11 is provided at one end of the rotating shaft 1, a spline 12 for limiting is provided on the outside of the reducing end 11, a commutator insulating sleeve 2 is installed on the outside of the reducing end 11, a card slot 22 is provided at the end of the commutator insulating sleeve 2 away from the rotating shaft 1, and a limiting sleeve 3 is inserted into the inside of the end of the commutator insulating sleeve 2 away from the rotating shaft 1, and a positioning ring 4 is sleeved on the outside of the limiting sleeve 3 and can abut against the end of the commutator insulating sleeve 2 away from the rotating shaft 1 for positioning, and a tightening sleeve 5 is rotatably installed on the outside of one end of the limiting sleeve 3 and can abut against one end of the positioning ring 4 to prevent horizontal movement.

[0025] When in use, the commutator insulating sleeve 2 is installed on the outside of the reducing end 11, and one end of the limiting sleeve 3 is inserted into the inside of the commutator insulating sleeve 2 away from the rotating shaft 1, and then the positioning ring 4 is put on the outside of the limiting sleeve 3, and the limiting sleeve 3 is fixed to the outside of the reducing end 11 through the tightening sleeve 5. At the same time, one end of the tightening sleeve 5 abuts against the side of the positioning ring 4 away from the commutator insulating sleeve 2, so that the positioning ring 4 is docked with the end of the commutator insulating sleeve 2 away from the rotating shaft 1, so that the positioning ring 4 positions the commutator insulating sleeve 2, avoiding the commutator from easily expanding and contracting after being heated, resulting in a gap between the commutator and the sleeve and loosening.

[0026] See also Figure 1 、 Figure 5 and Figure 6 As shown, a plurality of elastic abutting blocks 41 capable of being engaged with the inside of the engaging groove 22 are equidistantly provided on one side of the positioning ring 4 .

[0027] When in use, a number of elastic abutment blocks 41 are equidistantly arranged at one end of the positioning ring 4 close to the commutator insulating sleeve 2, and the elastic abutment blocks 41 are clamped in the slot 22, so that the positioning ring 4 fixes the commutator insulating sleeve 2 through the elastic abutment blocks 41 to avoid displacement.

[0028] See also Figure 7 As shown, a tightening block 31 that can be tightened is provided at one end of the limiting sleeve 3 away from the commutator insulating sleeve 2, and an external thread 32 is provided on the outside of the tightening block 31, and a first internal thread 33 is provided on the inside of the tightening block 31 to abut against the surface of the reducing end 11 to prevent displacement.

[0029] When in use, the end of the limiting sleeve 3 is inserted into the interior of the commutator insulating sleeve 2 away from the rotating shaft 1, so that the limiting sleeve 3 fixes the commutator insulating sleeve 2. A tightening block 31 is set at the end of the limiting sleeve 3 away from the commutator insulating sleeve 2, and a first internal thread 33 is set on the inner side of the tightening block 31, so that when the tightening block 31 is tightened, the first internal thread 33 can abut against the surface of the reducing end 11, thereby increasing the stability of the connection between the limiting sleeve 3 and the reducing end 11 and avoiding production displacement.

[0030] See also Figure 4 As shown, the interior of the tightening sleeve 5 is provided with a second internal thread 52 that can engage with the external thread 32 .

[0031] When in use, a second internal thread 52 is provided inside the tightening sleeve 5, and the second internal thread 52 can engage with the external thread 32, so that the tightening sleeve 5 rotates and the tightening block 31 is tightened by the cooperation of the second internal thread 52 and the external thread 32, thereby completing the fixing work of the limiting sleeve 3.

[0032] See also Figure 5 As shown, a plurality of key slots 21 that can be adapted to the splines 12 are provided inside the commutator insulating sleeve 2 near one end of the rotating shaft 1 .

[0033] When in use, a keyway 21 is provided inside the commutator insulating sleeve 2 near one end of the rotating shaft 1, and the keyway 21 can be adapted to the spline 12, so that the commutator insulating sleeve 2 can avoid rotation when installed on the outside of the reducing end 11.

[0034] See also Figure 5 As shown, a plurality of commutator segments 23 are equidistantly arranged on the outside of the commutator insulating sleeve 2 , and a clamping block 24 is provided at one end of the commutator segment 23 close to the rotating shaft 1 .

[0035] When in use, a plurality of commutator segments 23 are arranged outside the commutator insulating sleeve 2 , and a clamping block 24 is arranged at one end of the commutator segment 23 close to the rotating shaft 1 , so that the commutator segment 23 is electrically connected to the motor coil through the clamping block 24 .

[0036] See also Figure 4 As shown, the outside of the tightening sleeve 5 is provided with a reserved groove 51 for easy disassembly.

[0037] During use, by providing a plurality of reserved grooves 51 on the outside of the tightening sleeve 5 , the assembly and disassembly of the tightening sleeve 5 is made more convenient and faster.

[0038] The above embodiments merely represent one or several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A connection mechanism for a motor commutator with a positioning function, comprising a rotating shaft (1), characterized in that: One end of the rotating shaft (1) is provided with a reducing end (11), the outside of the reducing end (11) is provided with a spline (12) for limiting, the outside of the reducing end (11) is installed with a commutator insulating sleeve (2), the end of the commutator insulating sleeve (2) away from the rotating shaft (1) is provided with a slot (22), and the inside of the end of the commutator insulating sleeve (2) away from the rotating shaft (1) is plugged with a limiting sleeve (3), and the outside of the limiting sleeve (3) is provided with a positioning ring (4) capable of abutting against the end of the commutator insulating sleeve (2) away from the rotating shaft (1) for positioning, and the outside of one end of the limiting sleeve (3) is rotatably installed with a tightening sleeve (5) capable of abutting against one end of the positioning ring (4) to prevent horizontal movement.

2. The connection mechanism of a motor commutator with a positioning function according to claim 1, characterized in that: A plurality of elastic abutment blocks (41) capable of being clamped in the interior of the clamping groove (22) are equidistantly arranged on one side of the positioning ring (4).

3. The connection mechanism of the motor commutator with positioning function according to claim 1, characterized in that: A tightening block (31) capable of being tightened is provided at one end of the limiting sleeve (3) away from the commutator insulating sleeve (2), an external thread (32) is provided on the outside of the tightening block (31), and a first internal thread (33) is provided on the inside of the tightening block (31) to abut against the surface of the reducing end (11) to prevent displacement.

4. The connection mechanism of a motor commutator with a positioning function according to claim 1, characterized in that: The interior of the tightening sleeve (5) is provided with a second internal thread (52) capable of engaging with the external thread (32).

5. The connection mechanism of the motor commutator with positioning function according to claim 1, characterized in that: A plurality of key slots (21) capable of matching with the splines (12) are provided inside the commutator insulating sleeve (2) near one end of the rotating shaft (1).

6. The connection mechanism of the motor commutator with positioning function according to claim 1, characterized in that: A plurality of commutator segments (23) are equidistantly arranged on the outside of the commutator insulating sleeve (2), and a clamping block (24) is provided at one end of the commutator segment (23) close to the rotating shaft (1).

7. The connection mechanism of a motor commutator with a positioning function according to claim 1, characterized in that: The outside of the tightening sleeve (5) is provided with a reserved groove (51) for easy disassembly.

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