Direct current motor capable of preventing axial movement of rotor shaft
By setting limit grooves and combining limit structures on the outside of the rotor shaft of the DC motor, the problem of axial squirming of the rotor shaft is solved, the noise and vibration are reduced, and the service life of the motor is extended.
Patent Information
- Application Number
- CN202420684768.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-04-07
AI Technical Summary
In existing DC motors, the rotor shaft causes axial squirming due to load reaction forces during operation, resulting in increased noise and vibration, severe wear and reduced service life.
The limit groove is provided on the outside of the rotor shaft, and the limiting position of the rotor shaft is achieved through a combined structure of a fixing sleeve, a fixing ring, a toothed ring, a gear, a fixed threaded shaft and a limit block to prevent axial twitching.
Effectively prevent the rotor shaft from rushing axially, reduce noise and vibration, avoid wear, extend the service life of the motor, and is simple and convenient to operate.
Smart Images
Figure CN223066930U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a DC motor for preventing axial movement of a rotor shaft. Background Art
[0002] At present, in a common DC motor, it includes a housing, a stator and a rotor assembly. The rotor assembly includes a rotor and a rotor shaft. When DC motors of different sizes are working, the rotor shaft of the motor will have axial movement due to the reaction force from the load. Axial movement means that the shaft of the motor inevitably has a small movement along the axis direction during operation. If the axial movement of the rotor shaft is too large, it will cause the noise and vibration of motors of different sizes to be relatively large, and further lead to serious wear of the motor and reduce the service life of the motor. Therefore, in view of the above problems, a DC motor for preventing axial movement of the rotor shaft is proposed. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to overcome the existing defects and can effectively solve the problems in the background art.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0005] A DC motor for preventing axial movement of a rotor shaft, including a DC motor. A limiting groove is provided on the outer side of the rotor shaft of the DC motor. A fixing sleeve in contact with the DC motor is provided on the outer side of the rotor shaft of the DC motor. A rotating ring is rotatably connected to the outer side of the fixing sleeve. A toothed ring is fixedly connected to the inner side of the rotating ring. A gear is meshed and connected to the outer side of the toothed ring. One end of the gear is fixedly connected with a fixed threaded shaft, and the fixed threaded shaft penetrates through the fixing sleeve. The fixed threaded shaft is rotatably connected with the fixing sleeve. A limiting block is spirally connected to the outer side of the fixed threaded shaft, and the limiting block is slidably connected with the fixing sleeve.
[0006] As a further improvement of the utility model, a ball is rotatably connected to one end of the limiting block, and the ball is in contact with the inner wall of the limiting groove on the outer side of the rotor shaft of the DC motor.
[0007] As a further improvement of the utility model, one end of the limiting block is located in the limiting groove on the outer side of the rotor shaft of the DC motor, and the limiting block is slidably connected with the rotor shaft of the DC motor. There are 6 limiting blocks, and the limiting blocks are evenly distributed on the outer side of the rotor shaft of the DC motor.
[0008] As a further improvement of the utility model, connecting rods are fixedly connected to both the left and right ends of the fixing sleeve. One end of the outer side of the connecting rod is slidably connected with a fixing frame in contact with the DC motor. One end of the inner side of the connecting rod is spirally connected with a positioning threaded shaft penetrating through the fixing frame, and the positioning threaded shaft is rotatably connected with the fixing frame. The outer side bottom end of the fixing frame is slidably connected with a clamping block in contact with the DC motor.
[0009] As a further improvement of the present utility model, one end of the inner side of the clamping block is spirally connected with an adjusting threaded shaft that penetrates through the clamping block and the fixing frame, and the adjusting threaded shaft is rotatably connected with the fixing frame.
[0010] Compared with the prior art, the present utility model has the following beneficial effects:
[0011] 1. A DC motor for preventing axial movement of the rotor shaft. By providing a fixing sleeve, a fixing ring, a toothed ring, a gear, a fixing threaded shaft and a limiting block, when using the device, the fixing sleeve is sleeved on the outer side of the rotor shaft of DC motors of different sizes, and then the fixing ring is rotated to further drive the toothed ring to engage with the gear, which can drive the fixing threaded shaft to be spirally connected with the limiting block. At this time, by controlling the limiting block to insert into the limiting groove on the outer side of the rotor shaft of DC motors of different sizes, the limiting of the rotor shafts of DC motors of different sizes is realized, thereby preventing the phenomenon of axial movement of the rotor shaft, further avoiding large noise and vibration during the use of the device, and at the same time avoiding the phenomenon of serious wear during the use of the device, ensuring the service life of the device.
[0012] 2. A DC motor for preventing axial movement of the rotor shaft. By providing a positioning threaded shaft, an adjusting threaded shaft, a fixing frame, a connecting rod and a clamping block, after the fixing sleeve is limited on the outer side of the rotor shaft of the DC motor, the positioning threaded shaft is rotated to be spirally connected with the connecting rod so that the fixing frame contacts the DC motor, and then the adjusting threaded shaft is rotated to be spirally connected with the clamping block so that the clamping block clamps on the outer side of the DC motor, which facilitates the stable installation of the rotor shaft anti-axial movement mechanism on DC motors of different sizes, and the operation is simple and convenient. Description of the Drawings
[0013] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.
[0014] Figure 1 It is a schematic diagram of the overall structure of a DC motor for preventing axial movement of the rotor shaft according to the present utility model.
[0015] Figure 2 It is a schematic diagram of the sectional structure of a DC motor for preventing axial movement of the rotor shaft according to the present utility model.
[0016] Figure 3 It is a DC motor for preventing axial movement of the rotor shaft according to the present utility model Figure 2 Schematic diagram of the structure at A.
[0017] Figure 4 It is a schematic diagram of the top view sectional structure of the fixing sleeve of a DC motor for preventing axial movement of the rotor shaft according to the present utility model.
[0018] In the figure: 1. DC motor; 2. Fixed sleeve; 3. Fixed ring; 4. Tooth ring; 5. Gear; 6. Fixed threaded shaft; 7. Limit block; 8. Ball; 9. Connecting rod; 10. Fixed bracket; 11. Positioning threaded shaft; 12. Clamping block; 13. Adjusting threaded shaft. Specific embodiments
[0019] The present utility model will be further described below in conjunction with specific embodiments. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent. In order to better illustrate the specific embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted. Based on the specific embodiments of the present utility model, all other specific embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0020] Embodiment 1
[0021] As Figures 1-4 shown, a DC motor for preventing axial movement of the rotor shaft includes a DC motor 1. A limit groove is provided on the outer side of the rotor shaft of the DC motor 1. A fixed sleeve 2 in contact with the DC motor 1 is provided on the outer side of the rotor shaft of the DC motor 1. A rotating ring 3 is rotatably connected to the outer side of the fixed sleeve 2. A tooth ring 4 is fixedly connected to the inner side of the rotating ring 3. A gear 5 is meshed and connected to the outer side of the tooth ring 4. One end of the gear 5 is fixedly connected to a fixed threaded shaft 6, and the fixed threaded shaft 6 penetrates through the fixed sleeve 2. The fixed threaded shaft 6 is rotatably connected to the fixed sleeve 2. A limit block 7 is helically connected to the outer side of the fixed threaded shaft 6, and the limit block 7 is slidably connected to the fixed sleeve 2.
[0022] Embodiment 2
[0023] As Figure 2 and Figure 4 shown, in order to solve the problem that a large friction will be generated between the rotor shaft of the DC motor 1 and the limit block 7 during rotation, one end of the limit block 7 is rotatably connected to a ball 8, and the ball 8 is in contact with the inner wall of the limit groove on the outer side of the rotor shaft of the DC motor 1. By making the limit block 7 contact the rotor shaft of the DC motor 1 through the ball 8, a large friction between the rotor shaft of the DC motor 1 and the limit block 7 during rotation is avoided.
[0024] Embodiment 3
[0025] As Figure 2 and Figure 4As shown, to solve the problem of poor anti-axial movement effect of the rotor shaft of the DC motor 1, one end of the limit block 7 is located in the limit groove outside the rotor shaft of the DC motor 1, and the limit block 7 is slidably connected to the rotor shaft of the DC motor 1. There are six limit blocks 7, and the limit blocks 7 are evenly distributed outside the rotor shaft of the DC motor 1. By arranging six limit blocks 7 to evenly clamp in the limit groove outside the rotor shaft of the DC motor 1, the anti-axial movement effect of the rotor shaft of the DC motor 1 is better.
[0026] Embodiment 4
[0027] As Figures 1-2 shown, to solve the problem that it is not convenient for the fixing frame 10 to drive the clamping block 12 to clamp outside the DC motor 1, both left and right ends of the fixing sleeve 2 are fixedly connected with connecting rods 9. One outer end of the connecting rod 9 is slidably connected with a fixing frame 10 in contact with the DC motor 1. One inner end of the connecting rod 9 is screwed with a positioning threaded shaft 11 passing through the fixing frame 10, and the positioning threaded shaft 11 is rotatably connected with the fixing frame 10. The outer bottom end of the fixing frame 10 is slidably connected with a clamping block 12 in contact with the DC motor 1. By rotating the positioning threaded shaft 11 to be screwed with the connecting rod 9, it is convenient for the fixing frame 10 to drive the clamping block 12 to clamp outside the DC motor 1.
[0028] Embodiment 5
[0029] As Figure 2 shown, to solve the problem that the effect of the clamping block 12 clamping outside the DC motor 1 is poor when the device is installed outside DC motors 1 of different sizes, one inner end of the clamping block 12 is screwed with an adjusting threaded shaft 13 passing through the clamping block 12 and the fixing frame 10, and the adjusting threaded shaft 13 is rotatably connected with the fixing frame 10. By rotating the adjusting threaded shaft 13 to be screwed with the clamping block 12, the clamping block 12 is further brought into contact with the DC motor 1. When the device is installed outside DC motors 1 of different sizes, the effect of the clamping block 12 clamping outside the DC motor 1 is better.
[0030] In this embodiment, when the device is used, the fixing sleeve 2 is sleeved outside the rotor shafts of DC motors 1 of different sizes, and then the fixing ring 3 is rotated to further drive the gear ring 4 to engage with the gear 5. At this time, the fixing threaded shaft 6 can be driven to be screwed with the limit block 7. When the limit block 7 is inserted into the limit groove outside the rotor shaft of the DC motor 1 and drives the ball 8 to contact the rotor shaft of the DC motor 1, the positioning threaded shaft 11 is rotated to be screwed with the connecting rod 9 to make the fixing frame 10 contact the DC motor 1, and then the adjusting threaded shaft 13 is rotated to be screwed with the clamping block 12 to clamp the clamping block 12 outside the DC motor 1. At this time, the anti-axial movement mechanism of the rotor shaft is stably positioned on DC motors 1 of different sizes. When the device is used at this time, the limit block 7 is used to limit the rotor shafts of DC motors 1 of different sizes, and the phenomenon of axial movement of the rotor shaft can be avoided.
[0031] The above is the preferred embodiment of the present utility model. The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the description in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A DC motor for preventing axial movement of the rotor shaft, comprising a DC motor (1), characterized in that: A limiting groove is formed on the outer side of the rotor shaft of the DC motor (1). A fixing sleeve (2) in contact with the DC motor (1) is provided on the outer side of the rotor shaft of the DC motor (1). A rotating ring (3) is rotatably connected to the outer side of the fixing sleeve (2). A toothed ring (4) is fixedly connected to the inner side of the rotating ring (3). A gear (5) is meshed with the outer side of the toothed ring (4). One end of the gear (5) is fixedly connected to a fixing threaded shaft (6), and the fixing threaded shaft (6) penetrates through the fixing sleeve (2). The fixing threaded shaft (6) is rotatably connected to the fixing sleeve (2). A limiting block (7) is spirally connected to the outer side of the fixing threaded shaft (6), and the limiting block (7) is slidably connected to the fixing sleeve (2).
2. The DC motor for preventing axial movement of the rotor shaft according to claim 1, characterized in that: One end of the limiting block (7) is rotatably connected to a ball (8), and the ball (8) is in contact with the inner wall of the limiting groove on the outer side of the rotor shaft of the DC motor (1).
3. A DC motor for preventing axial movement of a rotor shaft according to claim 1, characterized in that: One end of the limiting block (7) is located in the limiting groove on the outer side of the rotor shaft of the DC motor (1), and the limiting block (7) is slidably connected to the rotor shaft of the DC motor (1). There are 6 limiting blocks (7), and the limiting blocks (7) are evenly distributed on the outer side of the rotor shaft of the DC motor (1).
4. A DC motor for preventing axial movement of a rotor shaft according to claim 1, characterized in that: Connecting rods (9) are fixedly connected to both the left and right ends of the fixing sleeve (2). A fixing frame (10) in contact with the DC motor (1) is slidably connected to one outer end of the connecting rod (9). A positioning threaded shaft (11) penetrating through the fixing frame (10) is spirally connected to one inner end of the connecting rod (9), and the positioning threaded shaft (11) is rotatably connected to the fixing frame (10). A clamping block (12) in contact with the DC motor (1) is slidably connected to the outer bottom end of the fixing frame (10).
5. A DC motor for preventing axial movement of a rotor shaft according to claim 4, characterized in that: An adjusting threaded shaft (13) penetrating through the clamping block (12) and the fixing frame (10) is spirally connected to one inner end of the clamping block (12), and the adjusting threaded shaft (13) is rotatably connected to the fixing frame (10).