Low-voltage direct-current traction motor

Abstract

The utility model discloses a low-voltage direct-current traction motor which comprises a direct-current motor, one side of the direct-current motor is provided with a speed reducer, one side of the speed reducer is connected with a protection device, the protection device comprises a transmission sleeve, a transmission shaft, a regulation and control block, a transmission groove and a transmission block, the regulation and control block is arranged in the transmission sleeve, and the transmission groove is formed in the outer side of the transmission shaft. The transmission block is clamped into the transmission groove, an adjusting device is arranged on one side of the transmission sleeve and comprises a regulation and control sleeve, a shifting sleeve, a regulation and control groove, a regulation and control plate, a shifting block and a shifting groove, the regulation and control groove is obliquely formed in the inner side of the transmission sleeve, the regulation and control plate is connected to one side of the regulation and control block, the shifting groove is formed in the inner wall of the regulation and control sleeve, and a reinforcing mechanism is arranged on the outer side of the transmission sleeve. The reinforcing mechanism comprises a limiting plate, a lock sleeve, a limiting rod, a lock block, a fixed block, a connecting spring and a limiting hole. According to the overload protection device, equipment damage caused by overload is avoided, flexible adjustment of an overload protection threshold value is achieved, and the stability and reliability of the adjusted equipment in long-term use are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of traction motor technology, and more specifically, to a low-voltage DC traction motor. Background Technology

[0002] Under the current technological background, low-voltage DC traction motors face numerous challenges in practical applications. In particular, when the output torque exceeds the preset safety threshold, the motor is highly susceptible to overload. This overload not only causes damage to critical components such as windings and bearings due to overheating, but in severe cases, it can even lead to motor burnout and irreversible hardware damage. More seriously, under overload conditions, the connection points at the motor output end bear enormous mechanical stress, making them highly prone to breakage, thus affecting the normal operation of the entire equipment and even causing safety accidents. Unfortunately, existing technologies generally lack effective overload protection devices. This design deficiency means that the motor cannot be protected in time under overload conditions, significantly increasing the risk of damage to the motor and connecting components. This not only increases equipment maintenance costs but may also lead to production interruptions due to equipment failure, resulting in huge economic losses and safety hazards.

[0003] Although some equipment has alleviated motor overload problems to some extent by adding overload protection devices, these devices still have significant adaptability issues in practical applications. Specifically, the trigger thresholds of these devices are usually fixed and cannot be adjusted flexibly according to actual working conditions and the specific stress on the output connection components. For example, in different working environments, factors such as the motor's load characteristics, operating speed, and the material and strength of the connection components will vary. A fixed trigger threshold obviously cannot meet diverse needs. This lack of flexibility means that overload protection devices often fail to play their due protective role in practical applications. Either the threshold is set too low, frequently triggering the protection mechanism and affecting the normal operation of the equipment; or the threshold is set too high, failing to effectively prevent overload at critical moments, still posing a risk of damage to the motor and connection components. This poor adaptability severely restricts the actual application effect of overload protection devices and brings many adverse effects.

[0004] Furthermore, although some devices achieve trigger threshold adjustment through the cooperation of certain components, their structural design is relatively simple and their stability is poor. During high-speed rotation of the motor, a large centrifugal force is generated. This centrifugal force can easily cause the overload protection device to loosen and shift, thereby affecting its normal function. This is especially true for devices that vibrate during use, as vibration will further exacerbate the loosening of the structure, causing the originally adjusted trigger threshold to change and making it impossible to achieve accurate overload protection. This problem of poor structural stability not only reduces the reliability of the overload protection device, but also increases the difficulty and frequency of equipment maintenance. Frequent adjustments and maintenance are not only time-consuming and labor-intensive, but may also cause new malfunctions due to improper operation, further aggravating the instability of the equipment. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a low-voltage DC traction motor to solve the technical problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a low-voltage DC traction motor, comprising a DC motor, a reducer on one side of the DC motor, a protective device connected to one side of the reducer, the protective device comprising a transmission sleeve, a transmission shaft, an adjusting block, a transmission groove, and a transmission block, the transmission sleeve being connected to the output end of the reducer, the transmission shaft being disposed inside the transmission sleeve, the adjusting block being disposed inside the transmission sleeve, the transmission groove being opened on the outside of the transmission shaft, the transmission block being inserted into the transmission groove, an adjusting device being disposed on one side of the transmission sleeve, the adjusting device comprising an adjusting sleeve, a shifting sleeve, an adjusting groove, an adjusting plate, a shifting block, and a shifting groove, the adjusting sleeve being rotatably mounted on one side of the transmission sleeve, the shifting sleeve being disposed inside the adjusting sleeve, and the adjusting groove being disposed inside the transmission sleeve. An inclined section is formed inside the transmission sleeve. The control plate is fixedly connected to one side of the control block, and the control plate slides in the control groove. The displacement block is fixedly set on the outside of the displacement sleeve. The displacement groove is spirally formed on the inner wall of the control sleeve, and the displacement block slides in the displacement groove. A reinforcing mechanism is provided on the outside of the transmission sleeve. The reinforcing mechanism includes a limiting plate, a locking sleeve, a limiting rod, a locking block, a fixed block, a connecting spring, and a limiting hole. The limiting plate is rotatably installed on the outside of the transmission sleeve. The locking sleeve slides on the outside of the transmission sleeve. The limiting rod is fixedly connected to one side of the locking sleeve. The locking block is movably set on one side of the control sleeve. Multiple fixed blocks are fixedly set on the outside of the transmission sleeve. The two ends of the connecting spring are respectively connected to two adjacent locking blocks. The limiting hole is formed on the limiting plate.

[0009] The present invention is further configured such that a connecting frame is detachably provided on one side of the reducer, the DC motor is detachably installed on one side of the connecting frame, and the output end of the DC motor is connected to the input end of the reducer.

[0010] The present invention is further configured such that a spring is movably sleeved on the outside of the limiting rod, one end of the spring is connected to the locking sleeve, and the other end of the spring is in contact with the limiting plate.

[0011] The present invention is further configured such that a locking groove is provided on one side of the locking block, and multiple locking rails are provided on one side of the adjusting sleeve. The locking groove and the locking rails are adapted to ensure the precise displacement of the locking block.

[0012] The present invention is further configured such that a linkage plate is fixedly provided on one side of the control block, and a linkage groove is provided on one side of the displacement sleeve. The linkage groove is adapted to the linkage plate to ensure the precise displacement of the control block.

[0013] The present invention is further configured such that a mating groove is provided on the inner side of the control block, and a movable spring is movably provided in the mating groove. The two ends of the movable spring are respectively connected to the inner wall of the mating groove and one side of the transmission block, providing basic overload protection capability.

[0014] The present invention is further configured such that the fixed block is designed as a columnar structure, and the outer side of the transmission block and the inner wall of the transmission groove are both designed with rounded corners.

[0015] The present invention is further configured such that a locking wheel is rotatably provided on one side of the locking block, and the locking wheel is engaged between two corresponding fixed blocks, ensuring smoother operation.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a low-voltage DC traction motor, which has the following advantages:

[0018] 1. The protective device, through the precise coordination of key components such as the transmission sleeve, transmission shaft, control block, and transmission block, enables the transmission block to slide out of the transmission groove and into the mating groove under overload conditions. Specifically, this allows the motor and reducer to enter an idling state, effectively preventing equipment damage caused by overload. This design not only improves the safety and reliability of the equipment but also extends its service life. The elastic action of the movable spring in the mating groove ensures that the transmission block can respond quickly under overload conditions, reducing mechanical stress caused by overload, protecting the internal structure of the equipment, and preventing wear and breakage of parts due to overload, further improving the overall stability and operating efficiency of the equipment.

[0019] 2. The adjustment device, through the coordinated operation of components such as the adjustment sleeve, shift sleeve, adjustment groove, adjustment plate, shift block, and shift groove, allows users to flexibly adjust the trigger threshold according to actual needs. In specific operation, the user rotates the adjustment sleeve, causing the locking block and locking wheel to rotate forward or backward, thus affecting the position of the shift sleeve and adjustment block. The rotation of the adjustment sleeve, through the cooperation of the locking rail and locking groove, drives the movement of the locking block and locking wheel, causing the shift block to slide along the shift groove, pushing the shift sleeve towards the inside of the transmission sleeve. Ultimately, the adjustment block causes the adjustment plate to slide along the adjustment groove, achieving the inner convergence of the adjustment block. This series of actions changes the thrust of the movable spring on the transmission block, thereby adjusting the force required for the transmission block to disengage from the transmission groove, achieving flexible adjustment of the overload protection threshold. This design not only enhances the adaptability and ease of use of the equipment but also allows for personalized settings based on different working environments and load conditions, improving the operational flexibility and user experience.

[0020] 3. The reinforcement mechanism, through the ingenious design of components such as the limiting plate, locking sleeve, limiting rod, locking block, fixed block, and connecting spring, ensures the structural stability after adjustment. After adjustment, the locking rail and locking groove work together to rotate the locking block between the fixed blocks. The connecting spring resets and pulls the locking block to slide inward, and the locking wheel engages between the fixed blocks. After the locking sleeve is released, the spring pushes the locking sleeve to reset, the limiting rod provides limiting support for the locking sleeve, and the inner wall of the locking sleeve limits the outer side of the locking wheel to prevent the locking wheel and locking block from sliding outward, thus achieving the limiting and locking of the control sleeve. This series of designs ensures the structural stability after adjustment, prevents the control sleeve from rotating arbitrarily, guarantees the stability and reliability of the equipment during long-term use, and improves the durability and ease of maintenance of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a low-voltage DC traction motor according to the present invention;

[0022] Figure 2 This is a schematic diagram of the dispersed structure in this utility model, excluding the motor and reducer components;

[0023] Figure 3 This is a schematic diagram of the dispersed cross-sectional structure of the present invention with the motor and reducer components removed.

[0024] Figure 4 This is a cross-sectional view of the transmission sleeve, locking sleeve, and limiting plate in this utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the drive shaft, shift sleeve, and control block in this utility model.

[0026] In the diagram: 1. DC motor; 2. Reducer; 3. Transmission sleeve; 4. Transmission shaft; 5. Control block; 6. Transmission groove; 7. Transmission block; 8. Control sleeve; 9. Shift sleeve; 10. Control groove; 11. Control plate; 12. Shift block; 13. Shift groove; 14. Limiting plate; 15. Lock sleeve; 16. Limiting rod; 17. Locking block; 18. Fixed block; 19. Connecting spring; 20. Limiting hole; 21. Connecting frame; 22. Spring; 23. Lock groove; 24. Locking rail; 25. Linkage plate; 26. Linkage groove; 27. Mating groove; 28. Movable spring; 29. ​​Locking wheel. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5A low-voltage DC traction motor includes a DC motor 1, a reducer 2 on one side of the DC motor 1, and a protective device connected to one side of the reducer 2. The protective device includes a transmission sleeve 3, a transmission shaft 4, an adjusting block 5, a transmission groove 6, and a transmission block 7. The transmission sleeve 3 is connected to the output end of the reducer 2. The transmission shaft 4 is located inside the transmission sleeve 3. The adjusting block 5 is located inside the transmission sleeve 3. The transmission groove 6 is located outside the transmission shaft 4. The transmission block 7 is inserted into the transmission groove 6. An adjusting device is provided on one side of the transmission sleeve 3. The adjusting device includes an adjusting sleeve 8, a shifting sleeve 9, an adjusting groove 10, an adjusting plate 11, a shifting block 12, and a shifting groove 13. The adjusting sleeve 8 is rotatably mounted on one side of the transmission sleeve 3. The shifting sleeve 9 is located inside the adjusting sleeve 8. The adjusting groove 10 is inclinedly located inside the transmission sleeve 3. The adjusting plate 11 is fixed. The control plate 11 is connected to one side of the control block 5 and slides in the control groove 10. The shift block 12 is fixedly set on the outside of the shift sleeve 9. The shift groove 13 is spirally opened on the inner wall of the control sleeve 8 and the shift block 12 slides in the shift groove 13. A reinforcement mechanism is provided on the outside of the transmission sleeve 3. The reinforcement mechanism includes a limiting plate 14, a locking sleeve 15, a limiting rod 16, a locking block 17, a fixed block 18, a connecting spring 19 and a limiting hole 20. The limiting plate 14 is rotatably installed on the outside of the transmission sleeve 3. The locking sleeve 15 is slidably set on the outside of the transmission sleeve 3. The limiting rod 16 is fixedly connected to one side of the locking sleeve 15. The locking block 17 is movably set on one side of the control sleeve 8. Multiple fixed blocks 18 are fixedly set on the outside of the transmission sleeve 3. The two ends of the connecting spring 19 are respectively connected to two adjacent locking blocks 17. The limiting hole 20 is opened on the limiting plate 14.

[0031] A connecting frame 21 is detachably provided on one side of the reducer 2, and the DC motor 1 is detachably installed on one side of the connecting frame 21, with the output end of the DC motor 1 connected to the input end of the reducer 2.

[0032] In this embodiment, when using the device, the DC motor 1 is first turned on. The output of the DC motor 1 drives the reducer 2 to run, causing the reducer 2 to drive the transmission sleeve 3 to rotate. Then, the transmission sleeve 3 drives the control block 5 to rotate through the cooperation of the control groove 10 and the control plate 11. Then, the control block 5 drives the transmission block 7 to rotate through the side wall of the mating groove 27. Then, the transmission block 7 drives the transmission shaft 4 to rotate in the forward direction through the cooperation with the transmission groove 6, thereby driving the external device to rotate. When encountering a large torque and resistance, the transmission shaft 4 drives the transmission groove 6 to stop rotating. Then, the inner wall of the transmission groove 6 presses against the outer wall of the transmission block 7, causing the transmission block 7 to gradually slide out of the transmission groove 6 and enter the mating groove 27. Then, the transmission block 7 presses against the movable spring 28 set in the mating groove 27, thereby causing the DC motor 1 to drive the transmission sleeve 3 to run idling through the reducer 2, realizing overload protection and preventing damage to the DC motor 1 and the reducer 2.

[0033] Please see Figures 1-5As a further implementation of the overall equipment: a spring 22 is movably sleeved on the outside of the limiting rod 16. One end of the spring 22 is connected to the locking sleeve 15, and the other end of the spring 22 is in contact with the limiting plate 14.

[0034] The locking block 17 has a locking groove 23 on one side, and the regulating sleeve 8 has multiple locking rails 24 on one side. The locking groove 23 is adapted to the locking rails 24.

[0035] A linkage plate 25 is fixedly provided on one side of the control block 5, and a linkage groove 26 is provided on one side of the displacement sleeve 9. The linkage groove 26 is adapted to the linkage plate 25.

[0036] The inner side of the control block 5 is provided with a mating groove 27, and a movable spring 28 is movably provided in the mating groove 27. The two ends of the movable spring 28 are respectively connected to the inner wall of the mating groove 27 and one side of the transmission block 7.

[0037] The fixed block 18 is designed as a column, and the outer side of the transmission block 7 and the inner wall of the transmission groove 6 are both designed with rounded corners.

[0038] A locking wheel 29 is provided on one side of the locking block 17, which can be rotated and engaged between the two corresponding fixed blocks 18.

[0039] More specifically, when the trigger threshold needs to be adjusted according to usage requirements, firstly, the limiting plate 14 is rotated so that the limiting hole 20 is rotated to a position concentric with the limiting rod 16. Then, the locking sleeve 15 is pushed so that the locking sleeve 15 drives the limiting rod 16 into the limiting hole 20. The locking sleeve 15 and the limiting plate 14 cooperate to compress the spring 22. Then, the locking sleeve 15 no longer limits the outer side of the locking wheel 29. Then, the adjusting sleeve 8 is rotated forward so that the adjusting sleeve 8 drives the locking block 17 and the locking wheel 29 to rotate forward through the locking rail 24 and the locking groove 23. Then, the locking wheel 29 rolls out between the two fixed blocks 18, and the locking wheel 29 drives the locking block 17 along the lock. Rail 24 and locking groove 23 slide outwards, then locking block 17 will drive connecting spring 19 to stretch outwards. At the same time, adjusting sleeve 8 will drive the inner displacement groove 13 to rotate in the forward direction. Then displacement block 12 will slide along displacement groove 13, and displacement block 12 will drive displacement sleeve 9 to slide inwards towards transmission sleeve 3. Then moving sleeve will push adjusting block 5 to move, so that adjusting block 5 drives adjusting plate 11 on one side to slide along adjusting groove 10. Then adjusting plate 11 will drive adjusting block 5 to converge inwards. Then adjusting block 5 will drive linkage plate 25 on one side to slide inwards along linkage groove 26, and adjusting block 5 will drive mating groove 27 to move inwards. The movement causes the inner wall of the mating groove 27 to press against the movable spring 28, increasing the thrust exerted by the movable spring 28 on the movable spring 28. This means the movable spring 28 needs to withstand a greater force to disengage from the transmission groove 6. To disengage the movable spring 7 from the transmission groove 6 with less force, simply rotate the adjusting sleeve 8 in the opposite direction. Once adjusted, stop rotating the adjusting sleeve 8, causing the locking rail 24 and locking groove 23 to engage and rotate the locking block 17 between the corresponding two fixed blocks 18. Then, the connecting spring 19 resets, pulling the locking block 17 inward along the locking rail 24 and locking groove 23. The locking block 17 then causes the locking wheel 29 to engage with the corresponding two... The locking sleeve 15 is then released between the fixed blocks 18. The spring 22 pushes the locking sleeve 15 to slide back to its original position. Then, the locking sleeve 15 drives the limiting rod 16 to slide back to its original position. After the spring 22 has fully reset, the limiting plate 14 is rotated again, causing the limiting plate 14 to drive the limiting hole 20 to rotate to a position that does not correspond to the limiting rod 16. Then, the limiting rod 16 provides limiting support for the locking sleeve 15 to prevent the locking sleeve 15 from sliding easily. Then, the inner wall of the locking sleeve 15 limits the outer side of the locking wheel 29, so that the locking wheel 29 and the locking block 17 cannot slide outward, thereby achieving the limiting and locking of the regulating sleeve 8 and preventing the regulating sleeve 8 from rotating. This ensures the stability of the adjusted structure and ensures stable use.

[0040] In summary, during the use or operation of the overall equipment: When using the equipment, first turn on the DC motor 1. The output of the DC motor 1 drives the reducer 2 to run, causing the reducer 2 to drive the transmission sleeve 3 to rotate. Then, the transmission sleeve 3 will drive the control block 5 to rotate through the cooperation of the control groove 10 and the control plate 11. Then, the control block 5 will drive the transmission block 7 to rotate through the side wall of the mating groove 27. Then, the transmission block 7 will drive the transmission shaft 4 to rotate in the forward direction through the cooperation of the transmission groove 6, thereby driving the external equipment to rotate. When encountering a large torque and resistance, the transmission shaft 4 will stop driving the transmission groove 6 to stop rotating. Then, the inner wall of the transmission groove 6 will press against the outer wall of the transmission block 7, causing the transmission block 7 to gradually slide out of the transmission groove 6 and enter the mating groove 27. Then, the transmission block 7 will press against the movable spring 28 set in the mating groove 27, thereby causing the DC motor 1 to drive the transmission sleeve 3 to run idling through the reducer 2, realizing overload protection and preventing damage to the DC motor 1 and the reducer 2.

[0041] When the trigger threshold needs to be adjusted according to usage requirements, first rotate the limiting plate 14 so that the limiting plate 14 drives the limiting hole 20 to a position concentric with the limiting rod 16. Then push the locking sleeve 15 so that the locking sleeve 15 drives the limiting rod 16 into the limiting hole 20. The locking sleeve 15 and the limiting plate 14 will cooperate to compress the spring 22. Then the locking sleeve 15 will no longer limit the outer side of the locking wheel 29. Then rotate the adjusting sleeve 8 in the forward direction so that the adjusting sleeve 8 drives the locking block 17 and the locking wheel 29 to rotate in the forward direction through the locking rail 24 and the locking groove 23. Then the locking wheel 29 will roll out between the two fixed blocks 18, and the locking wheel 29 will drive the locking block 17 along the locking rail 24. As the locking groove 23 slides outward, the locking block 17 will cause the connecting spring 19 to stretch outward. At the same time, the adjusting sleeve 8 will cause the inner displacement groove 13 to rotate in the forward direction. Then, the displacement block 12 will slide along the displacement groove 13, and the displacement block 12 will cause the displacement sleeve 9 to slide inward towards the transmission sleeve 3. Then, the moving sleeve will push the adjusting block 5 to move, so that the adjusting block 5 will cause the adjusting plate 11 on one side to slide along the adjusting groove 10. Then, the adjusting plate 11 will cause the adjusting block 5 to converge inward. Then, the adjusting block 5 will cause the linkage plate 25 on one side to slide inward along the linkage groove 26, and the adjusting block 5 will cause the mating groove 27 to move inward. The inner wall of the mating groove 27, in conjunction with the transmission block 7, presses against the movable spring 28, increasing the thrust exerted by the movable spring 28 on the transmission block 7. This requires the transmission block 7 to withstand greater force to disengage from the transmission groove 6. To disengage the transmission block 7 from the transmission groove 6 with less force, simply rotate the adjusting sleeve 8 in the opposite direction. Once adjusted, stop rotating the adjusting sleeve 8, causing the locking rail 24 and locking groove 23 to engage and rotate the locking block 17 between the corresponding two fixed blocks 18. Then, the connecting spring 19 resets, pulling the locking block 17 inward along the locking rail 24 and locking groove 23. The locking block 17 then causes the locking wheel 29 to engage with the corresponding two fixed blocks. Between the fixed blocks 18, the locking sleeve 15 is released, and the spring 22 pushes the locking sleeve 15 to slide back to its original position. Then, the locking sleeve 15 drives the limiting rod 16 to slide back to its original position. After the spring 22 has fully reset, the limiting plate 14 is rotated again, so that the limiting plate 14 drives the limiting hole 20 to rotate to a position that does not correspond to the limiting rod 16. Then, the limiting rod 16 provides limiting support for the locking sleeve 15 to prevent the locking sleeve 15 from sliding easily. Then, the inner wall of the locking sleeve 15 limits the outer side of the locking wheel 29, so that the locking wheel 29 and the locking block 17 cannot slide outward, thereby achieving the limiting and locking of the regulating sleeve 8 and preventing the regulating sleeve 8 from rotating. This ensures the stability of the adjusted structure and ensures stable use.

[0042] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-voltage direct-current traction motor comprising a direct-current motor (1) provided with a speed reducer (2) on one side, characterized in that: A protective device is connected to one side of the reducer (2). The protective device includes a transmission sleeve (3), a transmission shaft (4), an adjustment block (5), a transmission groove (6), and a transmission block (7). The adjustment block (5) is located inside the transmission sleeve (3). The transmission groove (6) is located outside the transmission shaft (4). The transmission block (7) is inserted into the transmission groove (6). An adjustment device is provided on one side of the transmission sleeve (3). The adjustment device includes an adjustment sleeve (8), a shift sleeve (9), an adjustment groove (10), an adjustment plate (11), a shift block (12), and a shift groove (13). The adjustment groove (10) is inclined and located inside the transmission sleeve (3). The adjustment plate (11) Connected to one side of the control block (5), the shift block (12) is set on the outside of the shift sleeve (9), the shift groove (13) is spirally opened on the inner wall of the control sleeve (8), and a reinforcement mechanism is set on the outside of the transmission sleeve (3). The reinforcement mechanism includes a limiting plate (14), a locking sleeve (15), a limiting rod (16), a locking block (17), a fixed block (18), a connecting spring (19), and a limiting hole (20). The limiting rod (16) is connected to one side of the locking sleeve (15), multiple fixed blocks (18) are set on the outside of the transmission sleeve (3), the connecting spring (19) is connected to two adjacent locking blocks (17), and the limiting hole (20) is opened on the limiting plate (14).

2. A low voltage DC traction motor as claimed in claim 1, characterized in that: The reducer (2) is detachably provided with a connecting frame (21) on one side, and the DC motor (1) is detachably installed on one side of the connecting frame (21), and the output end of the DC motor (1) is connected to the input end of the reducer (2).

3. A low voltage DC traction motor according to any one of claims 1 or 2, characterized in that: A spring (22) is movably sleeved on the outside of the limiting rod (16). One end of the spring (22) is connected to the locking sleeve (15), and the other end of the spring (22) is connected to the limiting plate (14) in contact.

4. A low voltage DC traction motor as claimed in claim 3, characterized in that: The locking block (17) has a locking groove (23) on one side, and the regulating sleeve (8) has multiple locking rails (24) on one side. The locking groove (23) is adapted to the locking rails (24).

5. A low voltage DC traction motor as claimed in claim 1, characterized in that: The control block (5) is fixedly provided with a linkage plate (25) on one side, and the shift sleeve (9) is provided with a linkage groove (26) on one side, and the linkage groove (26) is adapted to the linkage plate (25).

6. A low voltage DC traction motor as claimed in claim 1, characterized in that: The inner side of the control block (5) is provided with a mating groove (27), and a movable spring (28) is movably provided in the mating groove (27). The two ends of the movable spring (28) are respectively connected to the inner wall of the mating groove (27) and one side of the transmission block (7).

7. A low voltage DC traction motor as claimed in claim 4, characterized in that: The fixed block (18) is designed as a column, and the outer side of the transmission block (7) and the inner wall of the transmission groove (6) are designed as rounded corners.

8. A low voltage DC traction motor as claimed in claim 7, characterized in that: The locking block (17) has a locking wheel (29) on one side that rotates, and the locking wheel (29) is engaged between two corresponding fixed blocks (18).

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