Device based on unidirectional self-locking motor principle
By using a combined design of flexible friction parts and elastic gaskets in a one-way self-locking motor device, the problem of easy bearings is solved, extending service life and improving assembly compactness.
Patent Information
- Application Number
- CN202323659528.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-29
AI Technical Summary
In existing one-way self-locking motor devices, the bearings are easily damaged due to excessive impact force, resulting in a shortened service life.
The design of a combination of flexible friction parts and elastic gaskets provides additional self-locking force. The elastic gaskets are buffered when the shaft is close to or away from the friction parts, reducing impact on the bearings and ensuring that they are limited by the limit structure. The elastic gasket always acts as a buffer on the bearing.
It effectively reduces the impact force on the bearing, extends the service life of the bearing, and makes the assembly structure more compact by reducing the number of parts.
Smart Images
Figure CN222192054U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of actuators, in particular to a device based on the principle of a unidirectional self-locking motor. Background Art
[0002] In the prior art, in order to increase the self-locking force of the one-way self-locking motor, a friction plate corresponding to one axial end of the rotating shaft is usually provided on the housing, and the rotating shaft is slidably connected to the housing, so that when the device based on the one-way self-locking motor principle carries a load and is in a stationary state, the rotating shaft can slide axially while rotating, and the sliding rotating shaft and the friction plate are in contact with each other to provide additional self-locking force. However, there is a large gap between the rotating shaft and the housing in the axial direction, and the rotating shaft is prone to large movement. For this reason, in the prior art, an elastic gasket is usually provided between the bearing on the rotating shaft and the housing to fill the gap, wherein The elastic gasket is usually located on the side of the bearing close to the friction part. The friction plate is generally made of softer materials such as asbestos fiber friction material and carbon fiber friction material. When the shaft moves close to the friction part, the elastic gasket and the friction plate can buffer the impact of the shaft, resulting in less impact between the side of the bearing close to the friction part and the housing or other structures. However, when the shaft moves away from the friction part, the shaft lacks buffering, and the side of the bearing away from the friction part directly hits the housing or other structures. The impact force on the bearing is large, which can easily damage the balls inside the bearing, causing abnormal noise or damage to the bearing. Utility Model Content
[0003] The purpose to be achieved by the utility model is to provide a device based on the principle of a one-way self-locking motor, which overcomes the problem in the prior art that the bearing is easily damaged by impact, and is conducive to ensuring the service life of the bearing.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device based on the principle of a one-way self-locking motor, which is used to drive a load to move. The device based on the principle of a one-way self-locking motor includes a shell, a stator and a worm gear are arranged in the shell, the stator is fixedly connected to the shell, a rotor is arranged on the inner side of the stator, a rotating shaft is arranged axially on the rotor, the rotating shaft has a worm section meshing with the worm gear, the rotating shaft can move axially while the rotor rotates relative to the shell, a flexible friction part corresponding to one axial end of the rotating shaft is arranged on the shell, the rotating shaft slides relative to the shell with the rotor so that the rotating shaft and the flexible friction part fit together or separate, a bearing mounted on the rotating shaft is also arranged in the shell, an elastic gasket is arranged on the side of the bearing away from the flexible friction part, and the elastic gasket presses the rotating shaft through elastic deformation.
[0005] After adopting the above technical scheme, the utility model has the following advantages: the rotating shaft has a worm section meshing with the worm wheel, and the one-way self-locking characteristic of the worm wheel is utilized to realize the one-way self-locking of the motor, and the rotating shaft and the flexible friction member are made to fit or separate with each other by sliding with the rotor relative to the housing to provide additional self-locking force. At the same time, a flexible friction member is adopted, and an elastic gasket is provided on the side of the bearing away from the flexible friction member. The elastic gasket presses the rotating shaft through elastic deformation. When the rotating shaft moves close to the friction member, the flexible friction plate can buffer the impact of the rotating shaft to avoid excessive movement of the rotating shaft, and can also reduce the impact between the side of the bearing close to the flexible friction member and the housing or other structures. When the rotating shaft moves away from the flexible friction member, the elastic gasket can buffer the impact of the rotating shaft to avoid excessive movement of the rotating shaft, and can also reduce the impact between the side of the bearing close to the flexible friction member and the housing or other structures, which is beneficial to ensure the service life of the bearing.
[0006] Furthermore, two bearings are provided, and the elastic gasket is provided on the side of one of the bearings away from the flexible friction member. By adopting the above technical solution, after the elastic gasket buffers the impact of the rotating shaft, the impact on the two bearings on the rotating shaft can be reduced. The elastic gasket only needs to be provided on the side of one of the bearings away from the flexible friction member, which reduces the number of parts and makes the assembly structure based on the principle of the one-way self-locking motor more compact.
[0007] Furthermore, the bearing is located between the rotor and the housing, and the elastic gasket is located between the bearing and the housing. The above technical solution is adopted, and the elastic gasket is located between the bearing and the housing, which is conducive to preventing the bearing from directly hitting the housing.
[0008] Furthermore, a limiting structure for limiting radial movement of the elastic gasket is provided between the bearing and the housing. By adopting the above technical solution, the radial movement of the elastic gasket is limited by the limiting structure, so that the elastic gasket can always form a buffering effect on the bearing, effectively preventing the elastic gasket from deviating from the bearing.
[0009] Furthermore, the bearing includes a rolling bearing close to the worm section and a sliding bearing far from the worm section, and the elastic gasket is arranged on the side of the rolling bearing far from the flexible friction member. Through the above technical solution, since the rolling bearing is provided with balls, it is more easily damaged than the sliding bearing. By arranging the elastic gasket on the side of the rolling bearing far from the flexible friction member, the rolling bearing is effectively protected.
[0010] Furthermore, the bearing includes a first rolling bearing close to the worm section and a second rolling bearing far from the worm section, and the elastic gasket is arranged on the side of one of the first rolling bearing and the second rolling bearing far from the flexible friction member. Through the above technical solution, after the elastic gasket buffers the impact of the rotating shaft, the impact on the first rolling bearing and the second rolling bearing located on the rotating shaft can be reduced. The elastic gasket only needs to be arranged on the side of one of the rolling bearings far from the flexible friction member, reducing the number of parts and making the assembly structure based on the principle of the one-way self-locking motor more compact.
[0011] Furthermore, the flexible friction member is axially movable on the housing through a threaded fitting structure. Through the above technical solution, the spacing between the flexible friction member and the rotating shaft can be adjusted, and the self-locking force on the rotating shaft can also be adjusted by adjusting the spacing.
[0012] Furthermore, the flexible friction member is fixedly connected to the housing. Through the above technical solution, since the reaction force of the worm wheel drives the worm segment to rotate, the rotating shaft rotates, and the flexible friction member is fixedly connected to the housing to prevent the rotating shaft from driving the flexible friction member to rotate, so that the flexible friction member can effectively provide additional self-locking force for the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The utility model is further described below in conjunction with the accompanying drawings:
[0014] Figure 1 It is a structural schematic diagram of a device based on the principle of a one-way self-locking motor of the utility model;
[0015] Figure 2 It is a cross-sectional view of the device based on the principle of a one-way self-locking motor of the utility model;
[0016] Figure 3 It is a partial structural cross-sectional view of the device based on the principle of a one-way self-locking motor of the utility model;
[0017] Figure 4 It is a partial cross-sectional view of the device based on the principle of a one-way self-locking motor of the utility model (the rotating shaft is in the first position);
[0018] Figure 5 It is a partial cross-sectional view of the device based on the principle of a one-way self-locking motor of the utility model (the rotating shaft is in the second position);
[0019] Figure 6 A cross-sectional view (I) of a device based on the principle of a one-way self-locking motor according to another embodiment of the present invention;
[0020] Figure 7 This is a cross-sectional view (II) of a device based on the principle of a one-way self-locking motor according to another embodiment of the present invention;
[0021] Figure 8 A cross-sectional view (III) of a device based on the principle of a one-way self-locking motor according to another embodiment of the present utility model;
[0022] In the figure, 10, housing; 101, support frame; 102, mounting end cover; 103, gasket groove; 20, rotating shaft; 201, worm segment; 30, rotor; 40, worm wheel; 50, flexible friction member; 501, friction surface; 61, rolling bearing; 62, sliding bearing; 63, first rolling bearing; 64, second rolling bearing; 70, elastic gasket. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.
[0024] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.
[0025] It should be understood that in various embodiments of the present invention, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
[0026] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.
[0027] It should be understood that in the present utility model, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.
[0028] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.
[0029] like Figures 1 to 4 As shown, the utility model provides a device based on the principle of a one-way self-locking motor, which is used to drive a load to move. The device based on the principle of a one-way self-locking motor includes a housing 10, a stator and a worm gear 40 are arranged in the housing 10, the stator is fixedly connected to the housing 10, a rotor 30 is arranged on the inner side of the stator, a rotating shaft 20 is axially arranged on the rotor 30, the rotating shaft 20 has a worm segment 201 meshing with the worm gear 40, the rotating shaft 20 can move axially while rotating with the rotor 30 relative to the housing 10, a flexible friction member 50 corresponding to an axial end of the rotating shaft 20 is arranged on the housing 10, the rotating shaft 20 slides with the rotor 30 relative to the housing 10 so that the rotating shaft 20 and the flexible friction member 50 fit together or separate, a bearing sleeved on the rotating shaft 20 is also arranged in the housing 10, an elastic gasket 70 is arranged on the side of the bearing away from the flexible friction member 50, and the elastic gasket 70 presses the rotating shaft 20 by elastic deformation.
[0030] In this design, the shaft 20 has a worm section 201 meshing with the worm wheel 40, and the one-way self-locking property of the worm of the worm wheel 40 is utilized to realize the one-way self-locking of the motor. The shaft 20 slides with the rotor 30 relative to the housing 10 so that the shaft 20 and the flexible friction member 50 fit together or separate from each other to provide additional self-locking force. At the same time, the flexible friction member 50 is adopted, and an elastic gasket 70 is provided on the side of the bearing away from the flexible friction member 50. The elastic gasket 70 compresses the shaft 20 through elastic deformation. When the shaft 20 is close to the housing 10, the shaft 20 and the flexible friction member 50 are pressed against each other. When the friction part moves, the flexible friction plate can buffer the impact of the rotating shaft 20 to prevent the rotating shaft 20 from excessive movement, and can also reduce the impact between the side of the bearing close to the flexible friction part 50 and the shell 10 or other structures. When the rotating shaft 20 moves away from the flexible friction part 50, the elastic washer can buffer the impact of the rotating shaft 20 to prevent the rotating shaft 20 from excessive movement, and can also reduce the impact between the side of the bearing close to the flexible friction part 50 and the shell 10 or other structures, which is beneficial to ensure the service life of the bearing.
[0031] It should be noted that both the friction member and the shaft 20 are provided with friction surfaces 501 , and additional self-locking force is provided by the shaft 20 sliding with the rotor 30 relative to the housing 10 so that the friction surfaces 501 are in contact and rubbed against each other.
[0032] Specifically, the bearing is located between the rotor 30 and the housing 10, and the elastic gasket 70 is located between the bearing and the housing 10. With such a design, the elastic gasket 70 is located between the bearing and the housing 10, which is conducive to preventing the bearing from directly hitting the housing 10.
[0033] In order to effectively support the rotating shaft 20, two bearings are provided, and the elastic gasket 70 is provided on the side of one of the bearings away from the flexible friction member 50. With such a design, after the elastic gasket 70 buffers the impact of the rotating shaft 20, the impact on the two bearings on the rotating shaft 20 can be reduced. The elastic gasket 70 only needs to be provided on the side of one of the bearings away from the flexible friction member 50, which reduces the number of parts and makes the assembly structure based on the principle of the one-way self-locking motor more compact.
[0034] The bearing includes a rolling bearing 61 close to the worm segment 201 and a sliding bearing 62 away from the worm segment 201, an elastic gasket 70 is arranged on the side of the rolling bearing 61 away from the flexible friction member 50, a support frame 101 is arranged on the housing 10, and the elastic gasket 70 is located between the support frame 101 and the rolling bearing 61. With such a design, since the rolling bearing 61 is provided with a ball, it is easier to be damaged than the sliding bearing 62. The elastic gasket 70 is arranged on the side of the rolling bearing 61 away from the flexible friction member 50, so that the rolling bearing 61 is effectively protected.
[0035] Since the elastic gasket 70 may be moved by the axial force of the rotating shaft 20 and the bearing, the elastic gasket 70 may deviate from the bearing, causing the bearing to lose its effective buffering effect, for this reason, a limiting structure for limiting the radial movement of the elastic gasket 70 is provided between the bearing and the housing 10. In this design, the radial movement of the elastic gasket 70 is limited by the limiting structure, so that the elastic gasket 70 can always form a buffering effect on the bearing, effectively preventing the elastic gasket 70 from deviating from the bearing.
[0036] And, the flexible friction member 50 is fixedly connected to the housing 10. With such a design, since the reaction force of the worm wheel 40 drives the worm segment 201 to rotate, causing the rotating shaft 20 to rotate, the flexible friction member 50 is fixedly connected to the housing 10 to prevent the rotating shaft 20 from driving the flexible friction member 50 to rotate, so that the flexible friction member 50 can effectively provide additional self-locking force to the rotating shaft 20.
[0037] It should be noted that the flexible friction member 50 can be a flexible gasket. The shell 10 is also provided with a mounting end cover 102. The mounting end cover 102 is installed on the shell 10 to form an installation space for installing the flexible gasket. The flexible gasket is interference fit with the installation space to achieve a fixed connection with the shell 10.
[0038] The principle of the one-way self-locking motor is as follows: Figure 4 As shown, when the device based on the principle of a one-way self-locking motor drives the load to move, the worm segment 201 pushes the worm wheel 40 to rotate clockwise. At this time, the worm wheel 40 will apply a reaction force to the worm segment 201, so that the worm segment 201 moves upward. Correspondingly, the rotating shaft 20 moves upward. The rotating shaft 20 moves upward to squeeze the elastic gasket 70 and leave the flexible friction member 50 to be in the first position, so that the rotation of the rotating shaft 20 is no longer affected by the flexible friction member 50. The elastic gasket 70 can effectively buffer the impact force of the upward movement of the rotating shaft 20; Figure 5 As shown, when the device based on the principle of one-way self-locking motor carries a load and is stationary, there will be a counterclockwise reaction force on the worm wheel 40, which acts on the worm wheel 40 and drives the worm segment 201 to move downward. Correspondingly, the shaft 20 moves downward, and the reaction force is F1. At this time, the shaft 20 is in the second position, and the shaft 20 is in contact with the flexible friction member 50. At this time, F1 acts on the flexible friction member 50 through the worm wheel 40, and the dynamic friction coefficient between the flexible friction member 50 and the shaft 20 is μ. Among them, the self-locking force provided by the flexible friction member 50 is n is the number of gear teeth. The self-locking force increases as the load increases, thereby locking the device based on the principle of a one-way self-locking motor and preventing the load from moving.
[0039] like Figure 6As shown, it can be understood that in other embodiments of the utility model, the bearing includes a first rolling bearing 63 close to the worm segment 201 and a second rolling bearing 64 far away from the worm segment 201, and the elastic gasket 70 is arranged on the side of one of the first rolling bearing 63 and the second rolling bearing 64 far away from the flexible friction member 50. With such a design, after the elastic gasket 70 buffers the impact of the rotating shaft 20, the impact of the first rolling bearing 63 and the second rolling bearing 64 on the rotating shaft 20 can be reduced, and the elastic gasket 70 only needs to be arranged on the side of one of the rolling bearings 61 far away from the flexible friction member 50, thereby reducing the number of parts and components and making the assembly structure based on the principle of the one-way self-locking motor more compact.
[0040] Specifically, Figure 6 As shown, in one embodiment, the elastic gasket 70 is located on the side of the second rolling bearing 64 away from the friction member. It should be noted that in this embodiment, the housing 10 is provided with a gasket groove 103 , and the flexible friction member 50 is interference fit with the gasket groove 103 .
[0041] like Figure 8 As shown, in another embodiment, the elastic gasket 70 is located on a side of the first rolling bearing 63 away from the flexible friction member 50 .
[0042] like Figure 7 and Figure 8 As shown, it can be understood that in other embodiments of the present invention, the flexible friction member 50 is axially movable on the housing 10 through a threaded matching structure. With such a design, the spacing between the flexible friction member 50 and the rotating shaft 20 can be adjusted, and the self-locking force on the rotating shaft 20 can also be adjusted by adjusting the spacing.
[0043] It should be noted that the flexible friction member 50 includes a connecting section with threads and a flexible gasket installed on the connecting section. A threaded hole is provided on the housing 10, and the flexible gasket is installed by threaded connection between the connecting section and the threaded hole.
[0044] It should be noted that the elastic gasket 70 is placed in different directions, which determines the different self-locking directions. Figure 7 The flexible friction member 50 is disposed above the rotating shaft 20, and the elastic gasket 70 is disposed below the rolling bearing 61, so that the rotating shaft 20 moves upwards and is self-locking; Figure 8 The flexible friction member 50 is disposed below the rotating shaft 20 , and the elastic gasket 70 is disposed above the first rolling bearing 63 , so that the rotating shaft 20 moves downward and is self-locked.
[0045] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.
Claims
1. A device based on the principle of a one-way self-locking motor, used for driving a load to move, comprising a housing, a stator and a worm gear are arranged in the housing, the stator is fixedly connected to the housing, a rotor is arranged on the inner side of the stator, a rotating shaft is arranged axially on the rotor, the rotating shaft has a worm segment meshing with the worm gear, the rotating shaft can move axially while the rotor rotates relative to the housing, and is characterized in that: The shell is provided with a flexible friction part corresponding to one axial end of the rotating shaft. The rotating shaft slides relative to the shell along with the rotor so that the rotating shaft and the flexible friction part fit together or separate from each other. The shell is also provided with a bearing sleeved on the rotating shaft. An elastic gasket is provided on the side of the bearing away from the flexible friction part. The elastic gasket presses the rotating shaft through elastic deformation.
2. The device based on the principle of a one-way self-locking motor according to claim 1, characterized in that: There are two bearings, and the elastic gasket is arranged on a side of one of the bearings away from the flexible friction member.
3. The device based on the principle of one-way self-locking motor according to claim 2, characterized in that: The bearing is located between the rotor and the housing, and the elastic gasket is located between the bearing and the housing.
4. The device based on the principle of a one-way self-locking motor according to claim 3 is characterized in that: A limiting structure for limiting radial movement of the elastic gasket is arranged between the bearing and the housing.
5. The device based on the principle of one-way self-locking motor according to claim 2, characterized in that: The bearing comprises a rolling bearing close to the worm section and a sliding bearing far away from the worm section, and the elastic gasket is arranged on a side of the rolling bearing far away from the flexible friction member.
6. The device based on the principle of one-way self-locking motor according to claim 2, characterized in that: The bearing comprises a first rolling bearing close to the worm section and a second rolling bearing far away from the worm section, and the elastic gasket is arranged on a side of one of the first rolling bearing and the second rolling bearing far away from the flexible friction member.
7. The device based on the principle of one-way self-locking motor according to claim 1, characterized in that: The flexible friction member is axially movably arranged on the housing through a threaded fitting structure.
8. The device based on the principle of a one-way self-locking motor according to claim 1, characterized in that: The flexible friction member is fixedly connected to the housing.