Motor with adjustable self-locking force

Abstract

The utility model discloses a motor with adjustable self-locking force, which belongs to the field of actuators, solves the problem that the self-locking force of the existing motor is inconvenient to adjust, and adopts the technical scheme that the motor comprises a shell, a rotating shaft, a stator and a rotor, the rotor is fixed on the rotating shaft, the stator is sleeved on the rotor, the rotor can rotate relative to the stator, and the rotating shaft is fixed on the shell. The shell is provided with a first magnet, the rotor or the rotating shaft is provided with a second magnet spaced from the first magnet, the second magnet can rotate relative to the first magnet, and the first magnet and the second magnet attract each other magnetically to apply self-locking force to the rotor in a static state. The first magnet can move relative to the second magnet so as to change the distance between the first magnet and the second magnet. According to the utility model, the self-locking force of the motor is more convenient to adjust.

Description

Technical Field

[0001] The utility model relates to the field of actuators, in particular to a motor with adjustable self-locking force. Background Art

[0002] The self-locking force of a motor refers to the force acting on the whole device after the cogging torque generated by the cooperation of the internal iron core shape and the magnet is amplified by the worm gear and worm when the motor is in a power-off state. For example, when the lifting table is raised to the highest height and the power supply is unplugged, a weight of 100 kg can be added on the table without sliding down, but when adding more weight, the tabletop slides down. At this time, the self-locking force that the motor can provide is more than 1000 N.

[0003] In order to improve the self-locking force of the motor, in the prior art, such as the utility model patent CN115733298A, a magnetic self-locking motor assembly and a lifting device are disclosed. A first magnet is fixedly arranged on the rotating shaft, and a second magnet is fixedly arranged on the housing. The first magnet and the second magnet are arranged at intervals, and the self-locking force of the motor is provided by the magnetic force of the first magnet and the second magnet. Since the self-locking force required by the motor in different load environments is different, it is necessary to adjust the self-locking force of the motor. The magnitude of the magnetic force is related to the distance between the magnets, the magnetic strength, etc. The installation positions of the first magnet and the second magnet of the above device are fixed, and the distance between the two cannot be changed. To adjust the self-locking force of the motor, it is necessary to replace the first magnet and the second magnet for adjustment. Users need to prepare multiple sets of first magnets and second magnets with different magnetic strengths, resulting in relatively troublesome adjustment of the self-locking force of the motor. Summary of the Utility Model

[0004] The purpose to be achieved by the utility model is to provide a motor with adjustable self-locking force, which solves the problem that the adjustment of the self-locking force of the existing motor is inconvenient and makes the adjustment of the self-locking force of the motor more convenient.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A motor with adjustable self-locking force, including a housing, a rotating shaft, a stator and a rotor. The rotor is fixed on the rotating shaft, the stator is sleeved on the rotor, and the rotor can rotate relative to the stator to make the rotating shaft rotate. A first magnet is arranged on the housing, and a second magnet spaced from the first magnet is arranged on the rotor or the rotating shaft. The second magnet can rotate relative to the first magnet. The first magnet and the second magnet attract each other magnetically to apply a self-locking force to the rotor in a stationary state, and the first magnet can move relative to the second magnet to change the distance between the first magnet and the second magnet.

[0006] After adopting the above technical solution, the utility model has the following advantages: Through the magnetic attraction between the first magnet and the second magnet, this design can provide an additional self-locking force in the static state of the motor, further preventing accidental startup and increasing the safety of operation. Secondly, the first magnet can move relative to the second magnet, which means that the user can adjust the distance between the first magnet and the second magnet according to needs, thereby changing the magnitude of the magnetic attraction, enabling the self-locking force to be adjusted according to actual requirements, making the motor applicable to working environments under different load conditions, improving the universality and flexibility of the motor's use, without the need to replace the first magnet and the second magnet, without the need to prepare a variety of magnets with different magnetic forces as spares, reducing the inventory cost and management complexity, and improving the operation convenience.

[0007] Further, the first magnet is located outside the housing.

[0008] Adopting the foregoing technical solution, the first magnet located outside the housing can be more easily adjusted in position, thereby changing the distance from the second magnet, and then adjusting the magnetic force magnitude, without disassembling the internal structure of the motor, simplifying the adjustment process.

[0009] Further, the first magnet and the second magnet are sleeved on the rotating shaft, and the first magnet and the second magnet are arranged axially along the rotating shaft.

[0010] Adopting the foregoing technical solution, the first magnet and the second magnet are axially arranged by sleeving, reasonably utilizing the space between the rotating shaft and the housing, making the structure of the motor more compact, and also making it more intuitive and convenient to adjust the position or distance of the first magnet and the second magnet.

[0011] Further, at least two mounting parts are provided at different axial positions of the housing, and the first magnet is mounted on different mounting parts to change the axial position of the first magnet on the housing.

[0012] Adopting the foregoing technical solution, by simply mounting the first magnet on the mounting part at the axial position of the housing and changing the axial position of the first magnet on the housing, the distance between the first magnet and the second magnet can be changed, thereby changing the magnetic force magnitude, which is easy to adjust.

[0013] Further, the motor further includes a first mounting seat for mounting the first magnet, and the first magnet is detachably connected to the first mounting seat.

[0014] Adopting the foregoing technical solution, the detachable connection enables the first magnet to be easily installed and disassembled, retaining the method of adjusting the magnetic force magnitude by replacing the first magnet, enabling the motor to have a variety of ways to adjust the self-locking force, and the user can choose according to actual needs, with a wider scope of application.

[0015] Further, the first mounting seat is provided with a connecting portion, and the connecting portion is mounted on the mounting portion through a fastener.

[0016] With the above solution, the connecting portion can be easily aligned with the corresponding position on the mounting portion, simplifying the installation process and also avoiding damage caused by the direct contact between the first magnet and the mounting portion.

[0017] Further, a connecting inclined surface is provided between every two of the mounting portions, and the connecting portion can be switched more smoothly between different mounting portions along the connecting inclined surface.

[0018] With the foregoing technical solution, the connecting inclined surface can ensure that the conversion of the motor between different mounting positions is smoother, reducing sudden jamming or vibration and facilitating accurate installation adjustment by the user.

[0019] Further, the first mounting seat is sleeved on the rotating shaft, and the first mounting seat is provided with an avoidance channel for the rotating shaft to pass through, and the rotating shaft and the inner wall of the avoidance channel are arranged at intervals.

[0020] Through the above technical solution, direct contact between the rotating shaft and the first mounting seat is avoided, which helps to reduce the noise generated by friction and is also beneficial to air circulation, helping to dissipate the heat inside the motor, thereby improving the heat dissipation effect of the motor and ensuring the service life of the motor.

[0021] Further, the motor further includes a second mounting seat for mounting a second magnet, and the second magnet is detachably connected to the second mounting seat.

[0022] Through the above technical solution, the detachable connection enables the second magnet to be easily installed and removed, retaining the method of adjusting the magnetic force by replacing the second magnet, enabling the motor to have multiple ways to adjust the self-locking force, and the user can choose according to actual needs, with a wider range of applications.

[0023] Further, the first magnet is threadedly connected to the housing.

[0024] Through the above technical solution, the threaded connection can provide a fine-tuning function, enabling the user to precisely adjust the distance between the first magnet and the second magnet, thereby optimizing the interaction force between the magnets, making the adjustment of the self-locking force of the motor more accurate to meet different application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following further describes the present invention with reference to the drawings:

[0026] Figure 1 It is a schematic cross-sectional view of the structure of a motor with adjustable self-locking force according to the present invention;

[0027] Figure 2Cross-sectional view of the motor with adjustable self-locking force of the present utility model;

[0028] Figure 3 Of the present utility model Figure 2 Enlarged view of the structure at position A in

[0029] Figure 4 Partial structural schematic diagram of the housing of the present utility model;

[0030] Figure 5 Schematic diagram of the structure of the motor with adjustable self-locking force of the present utility model when the self-locking force is maximum;

[0031] Figure 6 Schematic diagram of the structure of the motor with adjustable self-locking force of the present utility model when the self-locking force is in the middle;

[0032] Figure 7 Schematic diagram of the structure of the motor with adjustable self-locking force of the present utility model when the self-locking force is minimum;

[0033] In the figure, 100, housing; 110, rotating shaft; 120, stator; 130, rotor; 140, mounting part; 150, connecting inclined surface; 200, first magnet; 210, second magnet; 220, first mounting seat; 221, connecting part; 222, avoidance channel; 230, second mounting seat; 240, gap. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model.

[0035] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above accompanying drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein.

[0036] It should be understood that in various embodiments of the present utility model, the magnitude of the sequence numbers of the various processes does not mean the order of execution. The order of execution of the various processes should be determined by their functions and internal logics and should not constitute any limitation to the implementation process of the embodiments of the present utility model.

[0037] It should be understood that in the present utility model, "comprising", "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] It should be understood that in the present utility model, "a plurality of" means two or more. "And / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y may represent: X exists alone, X and Y exist simultaneously, and Y exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "Comprising X, Y and Z", "comprising X, Y, Z" means that all of X, Y and Z are included, "comprising X, Y or Z" means that one of X, Y and Z is included, and "comprising X, Y and / or Z" means that any one or any two or three of X, Y and Z are included.

[0039] The technical solution of the present utility model will be described in detail below with specific embodiments. These several specific embodiments below can be combined or replaced according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0040] As Figures 1 to 7 shown, the present utility model provides a motor with adjustable self-locking force. The motor is mainly applicable to a lifting table. The motor includes a housing 100, a rotating shaft 110, a stator 120 and a rotor 130. The rotor 130 is fixed on the rotating shaft 110, the stator 120 is sleeved on the rotor 130, and the rotor 130 can rotate relative to the stator 120 to make the rotating shaft 110 rotate. A first magnet 200 is provided on the housing 100, and a second magnet 210 spaced from the first magnet 200 is provided on the rotating shaft 110. The second magnet 210 can rotate relative to the first magnet 200. The first magnet 200 and the second magnet 210 are magnetically attracted to apply a self-locking force to the rotor 130 in a stationary state, preventing accidental start-up and increasing the safety of operation.

[0041] In order to change the self-locking force of the motor, the first magnet 200 can move relative to the second magnet 210 to change the distance between the first magnet 200 and the second magnet 210. The user can adjust the distance between the first magnet 200 and the second magnet 210 according to needs, thereby changing the magnitude of the magnetic attraction force, so that the self-locking force can be adjusted according to actual requirements, enabling the motor to be applicable to working environments under different load conditions, improving the universality and flexibility of the motor use, without replacing the first magnet 200 and the second magnet 210, without preparing a variety of magnets with different magnetic force magnitudes as spares, reducing the inventory cost and management complexity, and improving the operation convenience.

[0042] It should be noted that the distance between the first magnet 200 and the second magnet 210 can also be adjusted by moving the second magnet 210.

[0043] Among them, the motor further includes a first mounting seat 220 for mounting the first magnet 200 and a second mounting seat 230 for mounting the second magnet 210. The first mounting seat 220 is sleeved on the rotating shaft 110. The first mounting seat 220 is provided with an avoidance channel 222 for the rotating shaft 110 to pass through. The rotating shaft 110 and the inner wall of the avoidance channel 222 are arranged at intervals, avoiding direct contact between the rotating shaft 110 and the first mounting seat 220, which helps to reduce the noise generated by friction and is also beneficial to air circulation, helping to dissipate the heat inside the motor, thereby improving the heat dissipation effect of the motor and ensuring the service life of the motor. The second mounting seat 230 is fixedly connected to the rotating shaft 110. The first magnet 200 is detachably connected to the first mounting seat 220, and the second magnet 210 is detachably connected to the second mounting seat 230. The detachable connection enables the first magnet 200 and the second magnet 210 to be easily installed and disassembled, retaining the method of adjusting the magnetic force by replacing the first magnet 200 and the second magnet 210, enabling the motor to have multiple ways to adjust the self-locking force, and users can choose according to actual needs, with a wider range of applications.

[0044] It should be noted that the second mounting seat 230 is provided with a special-shaped hole, and the rotating shaft 110 is provided with a special-shaped part that can be inserted into the special-shaped hole to ensure the fixed connection between the second mounting seat 230 and the rotating shaft 110. In addition, the first magnet 200 and the second magnet 210 can be magnetic rings surrounding the rotating shaft 110. The magnetic rings can be integrally formed or composed of multiple magnetic sheets, and the magnetic force can be adjusted by changing the number of magnetic sheets.

[0045] To further facilitate adjustment, the first magnet 200 is located outside the housing 100. The first magnet 200 located outside the housing 100 can be more easily adjusted in position, thereby changing the distance from the second magnet 210, and further adjusting the magnetic force, without disassembling the internal structure of the motor, simplifying the adjustment process.

[0046] Furthermore, the second magnet 210 can also be located outside the housing 100, which also facilitates the installation and disassembly of the second magnet 210.

[0047] Preferably, the first magnet 200 and the second magnet 210 are sleeved on the rotating shaft 110, and the first magnet 200 and the second magnet 210 are arranged along the axial direction of the rotating shaft 110, reasonably utilizing the space between the rotating shaft 110 and the housing 100, making the structure of the motor more compact, and also making it more intuitive and convenient to adjust the position or distance between the first magnet 200 and the second magnet 210.

[0048] It should be noted that the first magnet 200 can be located on the front side of the second magnet 210 or on the rear side of the second magnet 210.

[0049] Specifically, at least two mounting parts 140 are provided at different axial positions of the housing 100. The first magnet 200 is mounted on different mounting parts 140 to change the axial position of the first magnet 200 in the housing 100, so that the distance between the magnets can be easily adjusted, thereby changing the magnetic force, which is easy to adjust.

[0050] In addition, the first mounting seat 220 is provided with a connecting part 221. The connecting part 221 is mounted on the mounting part 140 through a fastener. The connecting part 221 can be conveniently aligned with the corresponding position on the mounting part 140, which simplifies the installation process and can also prevent the first magnet 200 from directly contacting the mounting part 140 and being damaged.

[0051] In this embodiment, the housing 100 is provided with mounting parts 140 at three heights. The mounting parts 140 are arranged at the rear end of the motor. The mounting parts 140 at the three heights form a group, and three groups are arranged along the circumferential direction of the motor. The first mounting seat 220 is provided with three connecting parts 221. The three connecting parts 221 are all connected to the mounting parts 140 at the same height in the three groups, realizing multi-point connection, making the installation of the first mounting seat 220 more reliable. The user rotates the first mounting seat 220 to make the connecting part 221 contact the mounting parts 140 at different heights and fixes them through fasteners to adjust the position of the first magnet 200, thereby changing the distance between the first magnet 200 and the second magnet 210.

[0052] In order to intuitively display the distance between the first magnet 200 and the second magnet 210, the distance between the first magnet 200 and the second magnet 210 is shown through the gap 240 between the first magnet 200 and the second magnet 210. As Figure 5 shown, the connecting part 221 is connected to the highest mounting part 140. At this time, the gap 240 between the first magnet 200 and the second magnet 210 is the smallest, that is, the distance between the two is the smallest, the magnetic force between the two is the largest, and the self-locking force of the motor is the largest; as Figure 6 shown, the connecting part 221 is connected to the mounting part 140 at the middle height. At this time, the gap 240 between the first magnet 200 and the second magnet 210 is increased compared with Figure 5 that is, the distance between the two is also increased, the magnetic force between the two is reduced compared with before, and the self-locking force of the motor is also reduced compared with before; as Figure 7 shown, the connecting part 221 is connected to the highest mounting part 140. At this time, the gap 240 between the first magnet 200 and the second magnet 210 is the largest, that is, the distance between the two is the largest, the magnetic force between the two is the smallest, and the self-locking force of the motor is the smallest.

[0053] It can be understood that the housing 100 may also be provided with two, four, five, six, seven, eight or other heights of the mounting portions 140, so as to realize multi-stage adjustment of the self-locking force of the motor.

[0054] To facilitate the switching of the connecting portion 221 between the mounting portions 140 at different heights, a connecting inclined surface 150 is provided between every two mounting portions 140 for transition. The connecting portion 221 can be switched between different mounting portions 140 along the connecting inclined surface 150. The connecting inclined surface 150 can ensure that the conversion of the motor between different mounting positions is smoother, reducing sudden jamming or vibration, and facilitating the user to perform precise installation adjustment.

[0055] To facilitate the fixing of the connecting portion 221, the mounting portion 140 can be a horizontal mounting surface for supporting and mounting the connecting portion 221. The horizontal mounting surface has threaded holes, the fastener can be a screw, and the connecting portion 221 can be a connecting lug with a through hole. The screw passes through the connecting hole and the threaded hole to fix the connecting lug on the horizontal mounting surface.

[0056] It should be noted that in addition to being used for a lifting table, this motor can also be used to lift other objects.

[0057] It can be understood that in other embodiments, the second magnet can also be fixedly connected to the rotor without contacting the rotating shaft, so that there is no need to reserve a part for mounting the second magnet on the rotating shaft, which is beneficial to making the structure of the rotating shaft more compact.

[0058] It can be understood that in other embodiments, the second mounting seat can also be fixedly connected to the rotating shaft through structures such as pins.

[0059] It can be understood that in other embodiments, both the first magnet and the second magnet can be located inside the housing. The first magnet and the second magnet are not easily exposed outside, reducing the safety hazards caused by the falling off or damage of the first magnet and the second magnet, and can also make the appearance of the motor more beautiful.

[0060] It can be understood that in other embodiments, the first magnet can be sleeved on the second magnet, or the second magnet can be sleeved on the first magnet.

[0061] It can be understood that in other embodiments, the first magnet is threadedly connected to the housing. Threaded connection can provide a fine-tuning function, enabling the user to precisely adjust the distance between the first magnet and the second magnet, thereby optimizing the interaction force between the magnets, making the adjustment of the self-locking force of the motor more accurate to adapt to different application requirements.

[0062] In addition to the above preferred embodiments, the present utility model has other implementation manners. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection claimed by the present utility model.

Claims

1. A motor with adjustable self-locking force, comprising a housing, a rotating shaft, a stator and a rotor, wherein the rotor is fixed on the rotating shaft, the stator is sleeved on the rotor, and the rotor can rotate relative to the stator to rotate the rotating shaft, characterized in that: A first magnet is provided on the shell, and a second magnet spaced apart from the first magnet is provided on the rotor or the rotating shaft. The second magnet can rotate relative to the first magnet. The first magnet and the second magnet are magnetically attracted to each other to apply a self-locking force to the rotor in a stationary state. The first magnet can move relative to the second magnet to change the distance between the first magnet and the second magnet.

2. The motor with adjustable self-locking force according to claim 1, characterized in that: The first magnet is located outside the housing.

3. The motor with adjustable self-locking force according to claim 1, characterized in that: The first magnet and the second magnet are sleeved on the rotating shaft, and the first magnet and the second magnet are arranged along the axial direction of the rotating shaft.

4. The motor with adjustable self-locking force according to claim 1, characterized in that: The shell is provided with at least two mounting parts at different axial positions, and the first magnet is mounted on different mounting parts to change the axial position of the first magnet in the shell.

5. The motor with adjustable self-locking force according to claim 4, characterized in that: The motor further comprises a first mounting seat for mounting a first magnet, and the first magnet is detachably connected to the first mounting seat.

6. The motor with adjustable self-locking force according to claim 5, characterized in that: The first mounting seat is provided with a connecting portion, and the connecting portion is mounted on the mounting portion through a fastener.

7. The motor with adjustable self-locking force according to claim 6, characterized in that: Every two of the mounting parts are transitioned by a connecting slope, and the connecting part can be switched between different mounting parts along the connecting slope.

8. The motor with adjustable self-locking force according to claim 5, characterized in that: The first mounting seat is sleeved on the rotating shaft, and the first mounting seat is provided with an escape channel for the rotating shaft to pass through, and the rotating shaft and the inner wall of the escape channel are arranged at intervals.

9. The motor with adjustable self-locking force according to claim 1, characterized in that: The motor further comprises a second mounting seat for mounting a second magnet, and the second magnet is detachably connected to the second mounting seat.

10. The motor with adjustable self-locking force according to claim 1, characterized in that: The first magnet is threadedly connected to the housing.

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