Anti-blocking worm gear mechanism and lock having the same

Abstract

The present invention discloses an anti-blocking worm gear mechanism and a lock having the same, the anti-blocking worm gear mechanism comprises a receiving part, a worm wheel, a linkage part, a trigger part, a worm and a driving motor, which is suitable for connecting to a driven part, the worm wheel is pivotally arranged in the receiving part around its own axis, and the worm wheel is movable between a first position and a second position relative to the receiving part; the linkage part cooperates with the worm wheel to move with the worm wheel; the trigger part is arranged adjacent to the linkage part; the worm is connected to the worm wheel in a driving manner, when the driven part is stuck, the worm continues to rotate and forces the worm wheel to move from the first position to the second position, the linkage part contacts and presses the trigger part with the movement of the worm wheel, so that the trigger part sends a trigger signal; the driving motor is connected to the worm, used to drive the worm to rotate, and control the worm to stop rotating when receiving the trigger signal. Thereby, the driving motor can avoid excessive load caused by blocking, extend the service life of the worm gear, and improve the stability and reliability of the worm gear.

Description

Technical Field

[0001] The invention relates to the technical field of worm gears, and in particular to an anti-blocking worm gear mechanism and a lock having the same. Background Art

[0002] The transmission of worm and worm wheel is called worm transmission. Worm transmission is a basic mechanical structure used to transmit the motion and power of two interlaced axes in space. It is widely used in various fields due to its advantages such as large reduction ratio, compact structure, stable operation, no noise, vibration buffering, 90-degree change of direction, etc. Existing worm gears will be blocked when in use. When the worm gear is blocked, the continuous operation will cause excessive load. The long-term blocking will greatly shorten the service life of the worm gear, and the stability and reliability will be low. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one object of the present invention is to provide an anti-blocking worm gear mechanism, comprising:

[0004] Accommodation pieces;

[0005] A worm wheel, adapted to be connected to a driven member, the worm wheel being pivotally disposed in the receiving member about its own axis, and the worm wheel being movable relative to the receiving member between a first position and a second position;

[0006] A linkage member, the linkage member cooperates with the worm gear to move with the worm gear;

[0007] A triggering member, the triggering member is disposed adjacent to the linkage member;

[0008] A worm, the worm is drivingly connected to the worm wheel. When the driven member is stuck, the worm continues to rotate and forces the worm wheel to move from the first position to the second position. The linkage member moves with the worm wheel to contact and press the trigger member, so that the trigger member sends a trigger signal.

[0009] A driving motor is connected to the worm gear to drive the worm gear to rotate and control the worm gear to stop rotating upon receiving the trigger signal.

[0010] Preferably, according to an embodiment of the present invention, the worm gear is arranged on the worm gear shaft, and a waist-shaped groove is provided on the receiving member. When the worm gear shaft slides to one end of the waist-shaped groove, the worm gear is located at the first position, and when the worm gear shaft slides to the other end of the waist-shaped groove, the worm gear is located at the second position.

[0011] Preferably, according to an embodiment of the present invention, there are two waist-shaped grooves, which are arranged opposite to each other, one end of the worm gear shaft can be slidably disposed in one of the two waist-shaped grooves, and the other end of the worm gear shaft can be slidably disposed in the other of the two waist-shaped grooves.

[0012] Preferably, according to an embodiment of the present invention, the linkage member is slidably disposed in the receiving member and is linked with the worm gear shaft to slide in the receiving member as the worm gear shaft slides in the waist-shaped groove.

[0013] Preferably, according to an embodiment of the present invention, the linkage member includes two opposite side walls and a connecting wall connected between the two side walls, the two side walls are respectively provided with positioning grooves, and the two ends of the worm gear shaft are respectively pivotally arranged in the two positioning grooves.

[0014] Preferably, according to one embodiment of the present invention, a sliding groove is provided on the receiving member, the linkage member is slidably connected to the sliding groove, and when the linkage member slides to one end of the sliding groove, the linkage member is located at the first position, and when the linkage member slides to the other end of the sliding groove, the linkage member is located at the second position.

[0015] Preferably, according to an embodiment of the present invention, it further comprises an elastic member, one end of the elastic member abuts against the linkage member, and the other end is connected to the trigger member, and the linkage member compresses the elastic member and contacts the trigger member when moving to the second position.

[0016] Preferably, according to an embodiment of the present invention, the trigger member has a trigger portion, and the other end of the elastic member is sleeved on the trigger portion. When the elastic member is compressed, the elastic member surrounds the outside of the trigger portion to make the trigger portion contact with the linkage member.

[0017] Preferably, according to an embodiment of the present invention, it further comprises a controller, wherein the controller is connected to the trigger member and is used to receive the trigger signal to control the drive motor to stop driving.

[0018] Another object of the present invention is to provide a lock, comprising:

[0019] A lock tongue, wherein the lock tongue has a first tooth portion;

[0020] Such as the anti-blocking worm gear mechanism mentioned above;

[0021] A driving gear ring, the driving gear ring is pivotally disposed in the receiving member around the axis of the worm wheel and is linked with the worm wheel to rotate with the worm wheel;

[0022] The second tooth portion of the driving gear ring is meshed with the first tooth portion, and the driving gear ring is used to drive the locking tongue to move between the locking position and the unlocking position when rotating with the worm gear.

[0023] The anti-blocking worm gear mechanism provided by the present invention can rotate on the linkage part when the worm wheel can rotate normally. When the worm wheel cannot rotate, the driving motor will drive the worm to rotate continuously and force the worm wheel to move linearly from the first position of the receiving part to the second position. At the same time, the worm wheel will push the linkage part to move to the second position together. When the linkage part moves to the second position, it can contact the trigger part so that the trigger part sends a trigger signal. When the driving motor receives the trigger signal, the worm will be controlled to stop rotating, thereby avoiding excessive load on the driving motor due to blocking, extending the service life of the worm gear and improving the stability and reliability of the worm gear.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 is a structural schematic diagram of an anti-blocking worm gear mechanism provided in an embodiment of the present invention;

[0027] Figure 2 is a cross-sectional view of an anti-blocking worm gear mechanism provided in an embodiment of the present invention;

[0028] Figure 3 is a structural exploded view of an anti-blocking worm gear mechanism provided in an embodiment of the present invention;

[0029] Figure 4 is another structural schematic diagram of the anti-blocking worm gear mechanism provided in an embodiment of the present invention;

[0030] Figure 5 is a schematic structural diagram of a worm gear and a linkage member provided in an embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of a lock having the anti-blocking worm gear mechanism provided in an embodiment of the present invention.

[0032] Description of Figure Numbers:

[0033] 10. Receiving member; 101. Waist-shaped groove; 20. Linkage member; 201. Side wall; 202. Connecting wall; 203. Positioning groove; 30. Worm wheel; 301. Worm wheel shaft; 40. Worm; 50. Driving motor; 60. Trigger member; 601. Trigger part; 70. Elastic member; 80. Controller; P10. Lock tongue; P20. Driving gear ring.

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0036] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “circumferential”, “radial”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] The anti-blocking worm gear mechanism and the lock having the same according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Reference Figures 1 to 4 As shown, the anti-blocking worm wheel 30 and worm 40 mechanism provided by the present invention includes a receiving member 10, a worm wheel 30, a linkage member 20, a trigger member 60, a worm 40 and a driving motor 50, which is suitable for being connected to a driven member. The worm wheel 30 is pivotally arranged in the receiving member 10 around its own axis, and the worm wheel 30 is movable between a first position and a second position relative to the receiving member 10; the linkage member 20 is linked with the worm wheel 30 to move with the worm wheel 30; the trigger member 60 is arranged adjacent to the linkage member 20; the worm 40 is transmission-connected with the worm wheel 30, when the driven member is stuck, the worm 40 continues to rotate and forces the worm wheel 30 to move from the first position to the second position, and the linkage member 20 moves with the worm wheel 30 to contact and press the trigger member 60, so that the trigger member 60 sends a trigger signal; the driving motor 50 is connected to the worm 40, so as to drive the worm 40 to rotate, and control the worm 40 to stop rotating upon receiving the trigger signal.

[0042] Among them, the receiving member 10 can be a shell, a chassis, etc., such as a reducer shell, a pump shell and a lock shell, and the worm gear 30 is rotatably arranged inside the linkage member 20. The linkage member 20 can be arranged to limit the horizontal direction and the bottom of the worm gear 30. For example, the linkage member 20 can be arranged to be U-shaped, rectangular, etc., thereby allowing the worm gear 30 to rotate freely inside the linkage member 20 with better stability. In some other embodiments, the external direction of the worm gear 30 can also be completely restricted by the linkage member 20.

[0043] Furthermore, when the worm wheel 30 is in the first position and is not stuck, the worm 40 can normally drive the worm wheel 30 to rotate; when the worm wheel 30 is stuck or an external component connected to the worm wheel 30 is stuck, causing the worm wheel 30 to be unable to rotate, the worm 40 will continue to rotate for a short time and drive the worm wheel 30 to move linearly along the length direction of the worm 40, so that the worm wheel 30 can move from the first position to the second position, and at the same time push the linkage member 20 to move from the first position to the second position, so that the linkage member 20 and the trigger member 60 are triggered.

[0044] Among them, when the trigger member 60 and the linkage member 20 are triggered, the trigger member 60 can send a trigger signal, and when the drive motor 50 receives the trigger signal, it stops running, so that the worm 40 stops rotating at the same time, avoiding excessive load caused by long-term operation of the motor; generally, the transmission method between the worm 40 and the worm wheel 30 is well known to those skilled in the art and will not be repeated here.

[0045] The anti-blocking worm wheel 30 and worm 40 mechanism provided by the present invention can rotate on the linkage member 20 when the worm wheel 30 can rotate normally. When the worm wheel 30 cannot rotate, the driving motor 50 will drive the worm 40 to rotate continuously and force the worm wheel 30 to move linearly from the first position of the receiving member 10 to the second position. At the same time, the worm wheel 30 will push the linkage member 20 to move to the second position together. When the linkage member 20 moves to the second position, it can contact the trigger member 60 so that the trigger member 60 sends a trigger signal. When the driving motor 50 receives the trigger signal, it will control the worm 40 to stop rotating, thereby avoiding excessive load on the driving motor 50 due to blocking, extending the service life of the worm wheel 30 and worm 40, and improving the stability and reliability of the worm wheel 30 and worm 40.

[0046] Furthermore, the worm wheel 30 is arranged on the worm wheel shaft 301, and a waist-shaped groove 101 is provided on the receiving member 10. When the worm wheel shaft slides to one end of the waist-shaped groove 101, the worm wheel 30 is located in the first position, and when the worm wheel shaft slides to the other end of the waist-shaped groove 101, the worm wheel 30 is located in the second position.

[0047] In this embodiment, the waist-shaped groove 101 can be used to limit the position of the worm wheel 30, so that the worm wheel 30 can only rotate or slide in the waist-shaped groove 101. When the worm wheel 30 is operating normally, the waist-shaped groove 101 can limit the worm wheel shaft 301 and the worm wheel 30 will not deviate when rotating. When the worm wheel 30 is stuck, the worm wheel 30 is driven to move from the first position to the second position, so that the worm wheel shaft 301 can limit and guide the worm wheel 30 to move from the first position to the second position in the waist-shaped groove 101, and move to the second position together with the worm wheel 30, so that the overall reliability and stability are better, and the triggering of the linkage 20 can be more stable.

[0048] It can be understood that the waist-shaped groove 101 can limit the worm gear shaft 301 so that the worm gear shaft 301 can only move or rotate within the waist-shaped groove 101. Therefore, the worm wheel 30 restricted by the worm gear shaft 301 can be more stable when moving from the first position to the second position. Therefore, the length of the waist-shaped groove 101 can be set, for example, it can be set to one-fourth of the length of the worm 40. Those skilled in the art can understand that the length of the waist-shaped groove 101 is not limited here and can be set according to actual needs.

[0049] In some other embodiments, the waist-shaped groove 101 can also be set to an adjustable length. For example, the waist-shaped groove 101 is set to be slidably installed between the receiving member 10, and the length of the waist-shaped groove 101 can be lengthened or shortened, so as to control the movement time interval of the worm gear 30 and the linkage member 20 from the first position to the second position, so that the drive motor 50 receives the trigger signal at different intervals and stops running.

[0050] Specifically, there are two waist-shaped grooves 101 , which are arranged opposite to each other, one end of the worm gear shaft can be slidably disposed in one of the two waist-shaped grooves 101 , and the other end of the worm gear shaft can be slidably disposed in the other of the two waist-shaped grooves 101 .

[0051] In this embodiment, the receiving member 10 can be used to seal the worm wheel 30 and worm 40 mechanism through the corresponding cover body. Therefore, the corresponding two ends of the worm wheel shaft 301 are respectively arranged in two waist-shaped grooves 101. When rotating, the two waist-shaped grooves 101 can limit the worm wheel shaft 301, so that the worm wheel shaft 301 can rotate freely in the two waist-shaped grooves 101; when the worm wheel 30 moves from the first position to the second position, the two waist-shaped grooves 101 jointly limit the worm wheel shaft 301, and make the worm wheel shaft 301 can only move in the two waist-shaped grooves 101 when moving in a straight line, and will not cause deviation, so that the triggering of the worm wheel 30 and the linkage 20 is more stable.

[0052] Specifically, the linkage member 20 is slidably disposed in the receiving member 10 and is linked with the worm shaft 301 so as to slide in the receiving member 10 as the worm shaft slides in the waist-shaped groove 101 .

[0053] In this embodiment, the linkage member 20 can be slidably arranged with the receiving member 10. When the worm gear 30 moves linearly from the first position to the second position, the linkage member 20 can also be pushed to slide from the first position to the second position together. Therefore, the sliding arrangement between the linkage member 20 and the receiving member 10 can make the linkage member 20 move more smoothly and be more stable and reliable when contacting the trigger member 60.

[0054] Reference Figure 5As shown, the linkage member 20 includes two opposite side walls 201 and a connecting wall 202 connected between the two side walls 201. Positioning grooves 203 are respectively provided on the two connecting walls 202, and both ends of the worm wheel shaft 301 are pivotally arranged in the two positioning grooves 203 respectively.

[0055] In this embodiment, the two side walls 201 and the connecting wall 202 can jointly form a U-shaped or ∪-shaped structure. The two positioning grooves 203 are arranged oppositely, so that when the worm wheel shaft 301 is pivotally arranged in the two positioning grooves 203, the worm wheel 30 can be suspended above the connecting wall 202 through the worm wheel shaft 301, so that the worm wheel 30 can rotate within the linkage member 20. When the worm wheel 30 moves linearly, the worm wheel 30 will drive the worm wheel shaft 301 and linearly push the linkage member 20, so that the linkage member 20 presses against the trigger member 60. Therefore, by accommodating the worm wheel 30 and the worm wheel shaft 301 through the linkage member 20, the overall structure is more compact and stable.

[0056] Optionally, a sliding groove is provided on the accommodating member 10, and the linkage member 20 is slidably connected to the sliding groove. When the linkage member 20 slides to one end of the sliding groove, the linkage member 20 is located at the first position. When the linkage member 20 slides to the other end of the sliding groove, the linkage member 20 is located at the second position.

[0057] In some other embodiments, a sliding groove can be provided inside the accommodating member 10, and the linkage member 20 is slidably connected and cooperated with the sliding groove, so that the linkage member 20 can slide within the sliding groove. That is to say, the linkage member 20 can also support the worm wheel 30 and the worm wheel shaft 301. Then, when the worm wheel 30 cannot rotate, the worm wheel 30 can be pushed to drive the linkage member 20 to slide within the sliding groove. Different from the worm wheel shaft 301 being arranged in the waist-shaped groove, the cooperation between the linkage member 20 and the sliding groove can also enable the linkage member 20 and the worm wheel 30 to move from the first position to the second position together, so as to perform pressing. The overall optional methods are more and the structure is simpler.

[0058] Specifically, an elastic member 70 is further included. One end of the elastic member 70 abuts against the linkage member 20, and the other end is connected to the trigger member 60. When the linkage member 20 moves to the second position, it compresses the elastic member 70 and contacts the trigger member 60.

[0059] In this embodiment, the elastic member 70 can be a spring, a spring piece, etc. When the worm wheel 30 operates normally, the elastic abutment of the elastic member 70 props up the linkage member 20 and the worm wheel 30, so that the worm wheel 30 can rotate on the linkage member 20; when the worm wheel 30 cannot rotate and the worm 40 continues to rotate, the worm wheel 30 will linearly move along the tooth part of the worm 40 and compress the elastic member 70, so that the linkage member 20 can press against the trigger member 60. Then, the trigger member 60 can send a trigger signal, and when the drive motor 50 receives the trigger signal, it stops operating to avoid excessive load on the motor.

[0060] Furthermore, the elastic member 70 can affect the size of the load force of the drive motor 50. When the elastic force and the load force are synchronized, the normal operation of the mechanism can be guaranteed within the elastic force range of the elastic member 70, and the load force of the drive motor 50 can be maximized within the allowable range of the entire worm gear mechanism. The greater the load force, the smoother the overall operation.

[0061] Specifically, the elastic member 70 can be set according to the following method: It is known that the output torque of the driving motor 50 is T b , the compression length of the elastic member 70 is L c , assuming the load force of the drive motor 50 is F a , the elastic force of the elastic member 70 is Fc, and the output force of the drive motor 50 is Fb; in order to ensure the normal operation of the worm gear mechanism, it is necessary to meet F a <F c ≤F b , where F c =K*L c ; K is the 70 coefficient of the elastic member; F b =T b * Worm circumference L b * Efficiency n / worm lead P x , from the above formula we can know: K≤(T b *L b *n) / (P x *L c ), F a <T b * Worm circumference L b * Efficiency n / worm lead P x .

[0062] Among them, the trigger component 60 can be a sensor, a trigger switch, etc., and the linkage component 20 can be set to a metal material, etc., and the trigger component 60 is sensed and triggered by the linkage component 20, so that the drive motor 50 can quickly respond to the trigger signal and stop running.

[0063] Refer again Figures 2 to 4 As shown, the trigger member 60 has a trigger portion 601 , and the other end of the elastic member 70 is sleeved on the trigger portion 601 . When the elastic member 70 is compressed, the elastic member 70 surrounds the trigger portion 601 to make the trigger portion 601 contact with the linkage member 20 .

[0064] In this embodiment, when the linkage member 20 compresses the elastic member 70, the elastic member 70 can be compressed on the outside of the detection column, so that the detection column extends from the inside of the elastic member 70 and contacts the linkage member 20, thereby ensuring that the contact between the detection column and the linkage member 20 is more reliable and stable.

[0065] Specifically, the controller 80 is further included. The controller 80 is connected to the trigger member 60 and is used to receive a trigger signal to control the driving motor 50 to stop driving.

[0066] Among them, the controller 80 can be a control circuit board, which controls the drive motor 50 and receives the trigger signal of the trigger member 60, so that the drive motor 50 can be quickly stopped when the worm gear 30 cannot operate, avoiding excessive load caused by long-term operation of the drive motor 50, ensuring a longer service life of the drive motor 50, and improving the overall stability and reliability.

[0067] Reference Figure 6 As shown, the present invention also provides a lock, including a lock tongue P10, a driving ring gear P20 and the anti-blocking worm wheel 30 and worm 40 mechanism as described above; the lock tongue P10 has a first tooth portion; the driving ring gear P20 is pivotally arranged in the receiving member 10 around the worm wheel shaft 301, and cooperates with the worm wheel 30 to rotate with the worm wheel 30; wherein the second tooth portion of the driving ring gear P20 is meshed with the first tooth portion, and the driving ring gear P20 is used to drive the lock tongue P10 to move between a locked position and an unlocked position when rotating with the worm wheel 30.

[0068] In this embodiment, the lock has a lock tongue P10 that is transmission-connected to the worm gear 30. When the worm gear 30 rotates normally, the worm gear 30 drives the driving ring gear P20 to rotate together, and the driving ring gear P20 drives the lock tongue P10 to move between the locked position and the unlocked position. It can be understood that when the lock tongue P10 is blocked or the worm gear 30 is blocked, the drive motor 50 can be stopped according to the above-mentioned implementation mode, thereby avoiding excessive load on the drive motor 50 and extending the overall service life.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An anti-blocking worm gear mechanism, characterized in that: include: Accommodation items; A worm wheel, adapted to be connected to a driven member, the worm wheel being pivotally disposed in the receiving member about its own axis, and the worm wheel being movable relative to the receiving member between a first position and a second position; A linkage member, the linkage member cooperates with the worm gear to move with the worm gear; A triggering member, the triggering member is disposed adjacent to the linkage member; A worm, the worm is drivingly connected to the worm wheel. When the driven member is stuck, the worm continues to rotate and forces the worm wheel to move from the first position to the second position. The linkage member moves with the worm wheel to contact and press the trigger member, so that the trigger member sends a trigger signal. A driving motor, the driving motor is connected to the worm, and is used to drive the worm to rotate, and control the worm to stop rotating upon receiving the trigger signal; The worm wheel is arranged on the worm wheel shaft, and the receiving member is provided with a waist-shaped groove. When the worm wheel shaft slides to one end of the waist-shaped groove, the worm wheel is located at the first position, and when the worm wheel shaft slides to the other end of the waist-shaped groove, the worm wheel is located at the second position; It also includes an elastic member, one end of which is pressed against the linkage member, and the other end of which is connected to the trigger member. When the linkage member moves to the second position, the elastic member is compressed and contacts the trigger member.

2. The anti-blocking worm gear mechanism according to claim 1, characterized in that: There are two waist-shaped grooves, which are arranged opposite to each other. One end of the worm gear shaft can be slidably disposed in one of the two waist-shaped grooves, and the other end of the worm gear shaft can be slidably disposed in the other of the two waist-shaped grooves.

3. The anti-blocking worm gear mechanism according to claim 1, characterized in that: The linkage member is slidably disposed in the receiving member and is linked with the worm gear shaft so as to slide in the receiving member as the worm gear shaft slides in the waist-shaped groove.

4. The anti-blocking worm gear mechanism according to claim 3, characterized in that: The linkage member comprises two opposite side walls and a connecting wall connected between the two side walls. Positioning grooves are respectively arranged on the two side walls. Both ends of the worm gear shaft are respectively pivotably arranged in the two positioning grooves.

5. The anti-blocking worm gear mechanism according to claim 1, characterized in that: The receiving member is provided with a slide groove, and the linkage member is slidably connected to the slide groove. When the linkage member slides to one end of the slide groove, the linkage member is located at the first position, and when the linkage member slides to the other end of the slide groove, the linkage member is located at the second position.

6. The anti-blocking worm gear mechanism according to claim 1, characterized in that: The trigger member has a trigger portion, and the other end of the elastic member is sleeved on the trigger portion. When the elastic member is compressed, the elastic member surrounds the trigger portion so that the trigger portion is in contact with the linkage member.

7. The anti-blocking worm gear mechanism according to claim 1, characterized in that: It also includes a controller, which is connected to the trigger component and is used to receive the trigger signal to control the drive motor to stop driving.

8. A lock, characterized in that: include: A lock tongue, wherein the lock tongue has a first tooth portion; The anti-blocking worm gear mechanism according to any one of claims 1 to 7; A driving gear ring, the driving gear ring is pivotally disposed in the receiving member around the axis of the worm wheel and is linked with the worm wheel to rotate with the worm wheel; The second tooth portion of the driving gear ring is meshed with the first tooth portion, and the driving gear ring is used to drive the locking tongue to move between the locking position and the unlocking position when rotating with the worm gear.

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