Linear driving motor capable of increasing self-locking force

Abstract

The utility model discloses a linear driving motor capable of increasing self-locking force, belongs to the field of actuators, solves the problem that a bearing is easy to damage due to an existing structure capable of increasing the self-locking force, and adopts the technical scheme that the linear driving motor mainly comprises a motor body, a motor shaft, a worm, a worm gear and the bearing, a brake part and an elastic pre-tightening part are arranged at one end, close to the worm, in the motor body, the motor shaft comprises a mounting section used for mounting the brake part, the diameter of the mounting section is gradually reduced from one end to the other end, the brake part sleeves the mounting section, the elastic pre-tightening part sleeves the brake part, and the bearing is arranged on the axial sides of the brake part and the elastic pre-tightening part. And when the mounting section extrudes the brake part, the brake part is radially expanded and deformed, and the elastic pre-tightening part tightly holds the brake part to enable the brake part to apply pre-tightening force to the mounting section in a rotating state so as to realize self-locking. According to the utility model, the self-locking force of the linear driving motor is effectively improved, and the influence on the bearing is effectively reduced.

Description

Technical Field

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

[0002] In order to improve the self-locking force of the linear drive motor in the prior art, utility model patent CN209982255U discloses a push rod motor, including a motor housing, a rotor is arranged in the motor housing, a magnet is fixed on the inner wall of the motor housing, a front end cover is arranged at the front end of the motor housing, a turbine seat is arranged on the front end cover, a turbine is rotatably arranged on the turbine seat, a worm is fixed on the front end of the rotor shaft of the rotor, the worm and the turbine cooperate, the rear end of the motor housing protrudes to one side to form a first bearing seat, a first bearing is arranged in the first bearing seat, the rear end of the rotor shaft is fixed to the first bearing, a fixed baffle and a movable damping plate are arranged on the rear end of the rotor shaft, and a set of springs arranged at the rear end of the rotor shaft, one end of the spring is against the baffle, and the other end of the spring elastically biases the damping plate, and the damping plate is against the end face of the first bearing. The damping plate is elastically biased by the spring, so that damping is generated between the damping plate and the end face of the first bearing, thereby ensuring that the motor can provide sufficient self-locking force after power failure. However, the first bearing is squeezed by the damping plate, which often damages the balls inside the first bearing, causing abnormal noise or damage to the first bearing. The damping between the damping plate and the first bearing will also cause wear on the end face of the first bearing. Utility Model Content

[0003] The purpose to be achieved by the utility model is to provide a linear drive motor with increased self-locking force, which solves the problem that the existing structure for increasing the self-locking force easily causes the bearing to be damaged, effectively improves the self-locking force of the linear drive motor, and effectively reduces the impact on the bearing.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a linear drive motor with increased self-locking force, comprising a motor body, a motor shaft, a worm, a worm wheel and a bearing, wherein the motor shaft is mounted on the motor body through a bearing and fixedly connected to the worm, the worm wheel and the worm are meshed, and the motor shaft drives the load to move through the worm wheel and the worm, and a brake and an elastic preload are provided at one end of the motor body close to the worm, the motor shaft comprises a mounting section for mounting the brake, the diameter of the mounting section is from large to small from one end to the other end, the brake is sleeved on the mounting section, the elastic preload is sleeved on the brake, the bearing is arranged on the axial side of the brake and the elastic preload, the motor shaft can move axially while rotating relative to the motor body so that the mounting section squeezes or leaves the brake, when the mounting section squeezes the brake, the brake undergoes radial outward expansion deformation, and the elastic preload holds the brake so that the brake applies a preload force to the mounting section in a rotating state to achieve self-locking.

[0005] After adopting the above technical scheme, the utility model has the following advantages: by utilizing the conical design of the mounting section and the cooperation of the brake part, when the motor shaft rotates and moves axially, the friction force of the brake part on the mounting section can be effectively increased, thereby improving the self-locking force of the motor; since the brake part and the elastic preload part can be dynamically adjusted with the axial displacement of the motor shaft, the system can adapt to different load conditions and working environments, and provide a more stable self-locking force; secondly, the bearing is arranged on the axial side of the brake part and the elastic preload part, and when the mounting section squeezes the brake part, the brake part undergoes radial outward expansion deformation, and the brake part does not axially squeeze the bearing, thereby reducing the wear and performance impact on the bearing and effectively reducing the noise emitted by the bearing; finally, by integrating the brake part and the elastic preload part inside the motor, the need for external brakes can be reduced, simplifying the overall design.

[0006] Furthermore, the diameter of one end of the mounting section close to the worm is smaller than the diameter of the other end away from the worm. When the motor shaft is in a forward rotation state, it moves toward the worm, so that the mounting section squeezes the brake member. When the motor shaft is in a reverse rotation state, it moves in the opposite direction, so that the mounting section leaves the brake member.

[0007] By adopting the above-mentioned technical solution, when the motor shaft rotates forward, the motor shaft moves toward the direction of the worm, and the diameter of the mounting section gradually increases, squeezing the brake part and increasing the friction, thereby achieving self-locking. When the motor shaft reverses, the motor shaft leaves the brake part, reducing the friction and the energy required to drive the load, so that the brake part is only activated when the motor shaft rotates in a fixed direction, reducing unnecessary friction and helping to ensure the service life of the brake part and other related components.

[0008] Furthermore, the diameter of one end of the mounting section close to the worm is larger than the diameter of the other end away from the worm. When the motor shaft is in a forward rotation state, it moves toward the worm, causing the mounting section to leave the brake member. When the motor shaft is in a reverse rotation state, it moves in the opposite direction, causing the mounting section to squeeze the brake member.

[0009] By adopting the above-mentioned technical solution, when the motor shaft rotates forward, the motor shaft moves toward the direction of the worm, the diameter of the mounting section gradually becomes smaller, and the motor shaft leaves the brake part, thereby reducing friction and reducing the energy required to drive the load. When the motor shaft reverses, the brake part is squeezed, increasing friction, thereby achieving self-locking, so that the brake part is only activated when the motor shaft rotates in a fixed direction, reducing unnecessary friction and helping to ensure the service life of the brake part and other related components.

[0010] Furthermore, the brake member includes a fixed ring and at least two friction ribs, the friction ribs are spaced apart from the bearing, the fixed ring is sleeved on the mounting section and fixed on the motor body, the at least two friction ribs are arranged on the fixed ring along the axial direction of the mounting section, the at least two friction ribs are surrounded in the circumference of the mounting shaft, and deformation gaps are provided between the friction ribs for the friction ribs to deform.

[0011] By adopting the above-mentioned technical solution, the brake part and the bearing are spaced apart, the brake part will not squeeze the bearing, the wear and performance impact on the bearing is reduced, and the noise emitted by the bearing is effectively reduced. The deformation gap allows the friction ribs to deform to a certain extent when under pressure, so that the brake part can better adapt to the shape and size changes of the mounting section and improve the braking efficiency. Secondly, the number of friction ribs increases the number of contact points between the brake part and the mounting section, thereby providing a larger friction area and enhancing the braking effect.

[0012] Furthermore, the inner diameter surrounded by the at least two friction ribs decreases from one end to the other end.

[0013] By adopting the above-mentioned technical solution, the space enclosed by the friction ribs is designed to be conical, so that when the friction ribs are squeezed, the contact area between the friction ribs and the motor shaft increases, thereby providing greater friction and enhancing the self-locking effect.

[0014] Furthermore, the diameter of the fixing ring is larger than the friction rib so that a limiting step is formed between the fixing ring and the friction rib, and one end of the elastic preload member abuts against the limiting step and is sleeved on the friction rib.

[0015] Through the above technical solution, the limiting step provides a clear support point for the elastic preload, ensuring the stability and uniformity of the preload force, and helping to accurately control the preload force of the brake part on the installation section, thereby achieving a stable self-locking effect. The design of the limiting step also limits the axial movement range of the elastic preload, avoiding excessive compression or stretching of the elastic preload in extreme cases, enhancing the structural stability of the entire braking system, and the limiting step provides a clear guide for the installation of the elastic preload, simplifying the assembly process, reducing the risk of assembly errors, and improving production efficiency.

[0016] Furthermore, the brake component is made of wear-resistant material.

[0017] Through the above technical solution, the wear-resistant material can resist long-term friction and wear, which means that the service life of the brake parts will be longer, reducing the frequency and cost of replacing the brake parts.

[0018] Furthermore, the linear drive motor also includes a rotor and a stator, the bearing includes a first bearing and a second bearing, the end of the motor shaft close to the worm is mounted on the motor body through the first bearing, and the end of the motor shaft away from the worm is mounted on the motor body through the second bearing, the rotor and the stator are located on one side of the first bearing, and the brake member and the elastic preload member are located on the other side of the first bearing and are separated from the first bearing.

[0019] Through the above technical solution, both ends of the motor shaft are supported by the first bearing and the second bearing respectively, which provides better axial and radial stability. Secondly, placing the rotor and stator on one side and the brake and elastic preload member on the other side helps to optimize the internal space layout of the motor, ensure that there is enough space between the components to avoid interference, improve the overall assembly efficiency, and reduce the debris generated by the wear of the brake parts from contacting the rotor and stator.

[0020] Furthermore, one end of the motor body away from the worm has an opening for allowing the motor shaft to pass through, and the motor shaft is installed in the opening through a second bearing, and the second bearing is an oil-containing bearing.

[0021] Through the above technical solution, the existence of the opening can help the motor dissipate heat.

[0022] Furthermore, the linear drive motor also includes a first installation cavity for installing a worm and a worm wheel and a second installation cavity for installing a brake member and an elastic preload member. The first installation cavity is an open structure so that the worm wheel and the worm are in an exposed state, and the second installation cavity is connected to the first installation cavity.

[0023] Through the above technical solution, the open design helps to improve air circulation in the worm and worm wheel area, improve heat dissipation conditions, and reduce heat accumulation. The second mounting cavity is connected to the first mounting cavity, so as to better dissipate the heat generated by the friction between the brake part and the elastic preload part, and also facilitate the removal of debris generated by the brake part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the linear drive motor with increased self-locking force in the utility model;

[0026] Figure 2 A cross-sectional view of a linear drive motor with increased self-locking force in the utility model;

[0027] Figure 3 It is a partial structural schematic diagram of a linear drive motor with increased self-locking force in the utility model;

[0028] Figure 4It is an exploded view of the local structure of the linear drive motor with increased self-locking force in the utility model;

[0029] Figure 5 It is a partial structural diagram of the linear drive motor with increased self-locking force in the utility model;

[0030] In the figure, 100, motor body; 1001, opening; 110, motor shaft; 1101, mounting section; 111, first bearing; 112, second bearing; 114, opening; 115, retaining ring; 120, worm; 130, brake member; 131, fixing ring; 132, friction rib; 133, deformation gap; 134, limiting step; 140, elastic preload member; 150, first mounting cavity; 160, second mounting cavity. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] like Figures 1 to 5 As shown, the utility model provides a linear drive motor with increased self-locking force, including a motor body 100, a motor shaft 110, a rotor, a stator, a worm 120, a worm wheel and a bearing. The motor shaft 110 is installed on the motor body 100 through a bearing and is fixedly connected with the worm 120. The worm wheel and the worm 120 are meshed. The motor shaft 110 drives the load to move through the worm wheel and the worm 120, and is mainly used for lifting and lowering a lifting table. A brake member 130 and an elastic preload member 140 are provided at one end of the motor body 100 close to the worm 120. The motor shaft 110 includes a mounting section 1101 for mounting the brake member 130, and the mounting section 1101 is provided at the motor body 100. The diameter of 101 decreases from one end to the other end, the brake member 130 is sleeved on the mounting section 1101, the elastic preload member 140 is sleeved on the brake member 130, and the bearing is arranged on the axial side of the brake member 130 and the elastic preload member 140. The motor shaft 110 can be axially moved while rotating relative to the motor body 100 to allow the mounting section 1101 to squeeze or leave the brake member 130. When the mounting section 1101 squeezes the brake member 130, the brake member 130 undergoes radial outward expansion deformation, and the elastic preload member 140 holds the brake member 130 so that the brake member 130 applies a preload force to the mounting section 1101 in a rotating state to achieve self-locking.

[0038] By utilizing the tapered design of the mounting section 1101 and the cooperation of the brake 130, when the motor shaft 110 rotates and moves axially, the friction of the brake 130 on the mounting section 1101 can be effectively increased, thereby improving the self-locking force of the motor. Since the brake 130 and the elastic preload 140 can be dynamically adjusted with the axial displacement of the motor shaft 110, the system can adapt to different load conditions and working environments and provide a more stable self-locking force. Secondly, the bearing is arranged on the axial side of the brake 130 and the elastic preload 140, and when the mounting section 1101 squeezes the brake 130, the brake 130 undergoes radial outward expansion deformation, and the brake 130 does not axially squeeze the bearing, thereby reducing the wear and performance impact on the bearing and effectively reducing the noise emitted by the bearing. Finally, by integrating the brake 130 and the elastic preload 140 inside the motor, the need for external brakes can be reduced and the overall design can be simplified.

[0039] Among them, the bearings include a first bearing 111 and a second bearing 112. The end of the motor shaft 110 close to the worm 120 is installed on the motor body 100 through the first bearing 111, and the end of the motor shaft 110 away from the worm 120 is installed on the motor body 100 through the second bearing 112, which provides better axial and radial stability. Secondly, the rotor and the stator are located on one side of the first bearing 111, and the brake 130 and the elastic preload member 140 are located on the other side of the first bearing 111 and are separated from the first bearing 111, which helps to optimize the internal space layout of the motor, ensure that there is enough space between the components, avoid interference, improve the overall assembly efficiency, and also reduce the debris generated by the wear of the brake 130 from contacting the rotor and the stator.

[0040] In order to improve the installation reliability of the first bearing 111, the first bearing 111 is fixed to the motor shaft 110 by two retaining rings 115. When the motor shaft 110 moves, it can drive the first bearing 111 to move together. The first bearing 111 and the end cover of the motor body 100 are supplemented with a corrugated gasket to fill the gap between the motor shaft 110 and the end cover of the motor body 100 to ensure that the rotor inside the motor will not move excessively.

[0041] Since the friction between the brake member 130 and the motor shaft 110 generates a large amount of heat, in order to dissipate the heat in time, the linear drive motor also includes a first installation cavity 150 for installing the worm 120 and the worm wheel and a second installation cavity 160 for installing the brake member 130 and the elastic preload member 140. The first installation cavity 150 is an open 1001 structure so that the worm wheel and the worm 120 are in an exposed state. The open 1001 design helps to improve air circulation in the worm 120 and worm wheel area, improve heat dissipation conditions, and reduce heat accumulation. Secondly, the second installation cavity 160 is connected to the first installation cavity 150, so as to better dissipate the heat generated by the friction between the brake member 130 and the elastic preload member 140, and also facilitate the removal of debris generated by the brake member 130.

[0042] Since the brake component 130 is easily worn out and needs to be replaced during long-term use, in order to reduce the frequency of replacement, the manufacturing material of the brake component 130 is a wear-resistant material. The wear-resistant material can withstand long-term friction and wear, which means that the service life of the brake component 130 will be longer, reducing the frequency and cost of replacing the brake component 130.

[0043] In this embodiment, the motor shaft 110 moves toward the worm 120 when in the forward rotation state, and moves in the opposite direction when in the reverse rotation state. In order to provide additional self-locking force when the motor shaft 110 is in the forward rotation state, the diameter of the end of the mounting section 1101 close to the worm 120 is smaller than the diameter of the end away from the worm 120. When the motor shaft 110 rotates forward, the motor shaft 110 moves toward the worm 120, and the diameter of the mounting section 1101 gradually increases, squeezing the brake member 130, increasing the friction force, and thus achieving self-locking. When the motor shaft 110 reverses, the motor shaft 110 leaves the brake member 130, reducing the friction force and reducing the energy required to drive the load, so that the brake member 130 is activated only when the motor shaft 110 rotates in a fixed direction, thereby reducing unnecessary friction and helping to ensure the service life of the brake member 130 and other related components.

[0044] Specifically, the brake member 130 includes a fixing ring 131 and at least two friction ribs 132. The friction ribs 132 are arranged at intervals from the bearing. The brake member 130 will not squeeze the bearing, reduce the wear and performance impact on the bearing, and effectively reduce the noise emitted by the bearing. The fixing ring 131 is sleeved on the mounting section 1101 and fixed on the motor body 100. At least two friction ribs 132 are arranged on the fixing ring 131 along the axial direction of the mounting section 1101. At least two friction ribs 132 are surrounded in the circumference of the mounting axis. A deformation gap 133 is provided between the mutual friction ribs 132 for the friction ribs 132 to deform. The deformation gap 133 allows the friction ribs 132 to deform to a certain extent when under pressure, so that the brake member 130 can better adapt to the shape and size changes of the mounting section 1101 and improve the braking efficiency. Preferably, there are four friction ribs 132. The number of friction ribs 132 increases the number of contact points between the brake member 130 and the mounting section 1101, thereby providing a larger friction area and enhancing the braking effect.

[0045] In order to further enhance the self-locking effect, the inner diameter enclosed by at least two friction ribs 132 decreases from large to small from one end to the other, and the space enclosed by the friction ribs 132 is conically designed so that when the friction ribs 132 are squeezed, the contact area with the motor shaft 110 increases, thereby providing greater friction and enhancing the self-locking effect.

[0046] In order to improve the installation reliability of the elastic preloaded member 140, the diameter of the fixing ring 131 is larger than the friction rib 132 so that a limiting step 134 is formed between the fixing ring 131 and the friction rib 132. One end of the elastic preloaded member 140 abuts against the limiting step 134 and is sleeved on the friction rib 132. The limiting step 134 provides a clear support point for the elastic preloaded member 140, ensuring the stability and uniformity of the preloaded force, and helps to accurately control the preloaded force of the brake member 130 on the mounting section 1101, thereby achieving a stable self-locking effect. The design of the limiting step 134 also limits the axial movement range of the elastic preloaded member 140, avoiding excessive compression or stretching of the elastic preloaded member 140 under extreme conditions, thereby enhancing the structural stability of the entire braking system. In addition, the limiting step 134 provides a clear guide for the installation of the elastic preloaded member 140, simplifies the assembly process, reduces the risk of assembly errors, and improves production efficiency.

[0047] It should be noted that the friction rib 132 is made of a flexible material and the elastic preload member 140 can be a spring.

[0048] To further improve the heat dissipation effect, the motor body 100 has an opening 114 at one end away from the worm 120 for the motor shaft 110 to pass through, and the opening 114 can help the motor dissipate heat. The motor shaft 110 is installed in the opening 114 through the second bearing 112, and the second bearing 112 is an oil-containing bearing.

[0049] It can be understood that in other embodiments, in order to provide additional self-locking force when the motor shaft is in a reverse state, the diameter of the end of the mounting section close to the worm is larger than the diameter of the end away from the worm. When the motor shaft rotates forward, the motor shaft moves toward the worm, and the diameter of the mounting section gradually decreases. The motor shaft leaves the brake member, reducing friction and reducing the energy required to drive the load. When the motor shaft reverses, the brake member is squeezed, increasing friction, thereby achieving self-locking, so that the brake member is activated only when the motor shaft rotates in a fixed direction, reducing unnecessary friction and helping to ensure the service life of the brake member and other related components.

[0050] 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 linear drive motor with increased self-locking force, comprising a motor body, a motor shaft, a worm, a worm wheel and a bearing, wherein the motor shaft is mounted on the motor body through a bearing and fixedly connected to the worm, the worm wheel and the worm are meshed, and the motor shaft drives the load to move through the worm wheel and the worm, characterized in that: A brake part and an elastic preload part are provided at one end of the motor body close to the worm, and the motor shaft includes a mounting section for mounting the brake part, and the diameter of the mounting section decreases from one end to the other end, and the brake part is sleeved on the mounting section, and the elastic preload part is sleeved on the brake part. The bearing is provided on the axial side of the brake part and the elastic preload part, and the motor shaft can be axially moved while rotating relative to the motor body to allow the mounting section to squeeze or leave the brake part. When the mounting section squeezes the brake part, the brake part undergoes radial outward expansion deformation, and the elastic preload part holds the brake part tightly so that the brake part applies a preload force to the mounting section in a rotating state to achieve self-locking.

2. The linear drive motor with increased self-locking force according to claim 1, characterized in that: The diameter of one end of the mounting section close to the worm is smaller than the diameter of the other end away from the worm. When the motor shaft is in a forward rotation state, it moves toward the worm, so that the mounting section squeezes the brake member. When the motor shaft is in a reverse rotation state, it moves in the opposite direction, so that the mounting section leaves the brake member.

3. The linear drive motor with increased self-locking force according to claim 1, characterized in that: The diameter of one end of the mounting section close to the worm is larger than the diameter of the other end away from the worm. When the motor shaft is in a forward rotation state, it moves toward the worm, so that the mounting section leaves the brake member. When the motor shaft is in a reverse rotation state, it moves in the opposite direction, so that the mounting section squeezes the brake member.

4. The linear drive motor with increased self-locking force according to claim 1, characterized in that: The brake member includes a fixed ring and at least two friction ribs, the friction ribs are spaced apart from the bearing, the fixed ring is sleeved on the mounting section and fixed on the motor body, the at least two friction ribs are arranged on the fixed ring along the axial direction of the mounting section, the at least two friction ribs are surrounded in the circumference of the mounting shaft, and a deformation gap is provided between the friction ribs for the friction ribs to deform.

5. The linear drive motor with increased self-locking force according to claim 4, characterized in that: The inner diameter surrounded by the at least two friction ribs decreases from one end to the other end.

6. The linear drive motor with increased self-locking force according to claim 4, characterized in that: The diameter of the fixing ring is larger than the friction rib so that a limiting step is formed between the fixing ring and the friction rib. One end of the elastic preload member abuts against the limiting step and is sleeved on the friction rib.

7. The linear drive motor with increased self-locking force according to claim 1, characterized in that: The brake element is made of wear-resistant material.

8. The linear drive motor with increased self-locking force according to claim 1, characterized in that: The linear drive motor also includes a rotor and a stator. The bearing includes a first bearing and a second bearing. The end of the motor shaft close to the worm is mounted on the motor body through the first bearing, and the end of the motor shaft away from the worm is mounted on the motor body through the second bearing. The rotor and the stator are located on one side of the first bearing, and the brake member and the elastic preload member are located on the other side of the first bearing and are separated from the first bearing.

9. The linear drive motor with increased self-locking force according to claim 8, characterized in that: The motor body has an opening at one end away from the worm for the motor shaft to pass through, and the motor shaft is installed in the opening through a second bearing, and the second bearing is an oil-containing bearing.

10. The linear drive motor with increased self-locking force according to claim 1, characterized in that: The linear drive motor also includes a first installation cavity for installing a worm and a worm wheel and a second installation cavity for installing a brake member and an elastic preload member. The first installation cavity is an open structure so that the worm wheel and the worm are in an exposed state. The second installation cavity is connected to the first installation cavity.

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