An unlocking limit device

Abstract

The present invention discloses an unlocking and limiting device, which relates to the technical field of AGV braking. The key points of its technical solution include a limiting mechanism assembly, an unlocking mechanism assembly that is matched and connected with the limiting mechanism assembly, and a power push rod. The limiting mechanism assembly includes a limiting block seat, the limiting block seat is provided with a block lifting jack, a limiting block head for limiting the upper end to pass through is arranged in the block lifting jack, and a lifting unit for driving the lifting is arranged at the bottom of the limiting block head. The unlocking mechanism assembly includes an auxiliary bottom plate, a spring pin seat and a driving unit are arranged on the auxiliary bottom plate, and the driving unit is used to drive the lifting unit to operate. The present invention realizes the purpose of directly driving the lifting unit to operate and completing unlocking and limiting through the driving unit; and makes the upper end of the unlocking spring pin abut against the lifting unit, so that the unlocking and limiting device has the effect of improving the unlocking and limiting efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of AGV braking, and more specifically, it relates to an unlocking and limiting device. Background Art

[0002] In a typical e-commerce warehouse, there are five most labor-intensive processes: picking, displacement, secondary sorting, rechecking and packaging, and sorting according to the flow direction. Among them, displacement and sorting according to the flow direction can be automated through setting up transmission lines and scanning codes. This has been achieved in almost most modern warehouses, but error control and the processes of picking, secondary sorting, and rechecking and packaging with extremely large workloads still need to be completed manually. During the process of goods handling, with the help of a power arm, workers take the materials out of the buffer rack and move them to a load-bearing AGV. The load-bearing AGV travels along a specified path to the production equipment, and then workers, with the help of a power arm, move the materials from the load-bearing AGV to the production equipment.

[0003] In the prior art, the structure of the unlocking and limiting device of the AGV is simple, and the efficiency of realizing unlocking and limiting is low and the effect is poor, which affects the safe operation of the AGV and needs to be improved. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an unlocking and limiting device, which has the effect of improving the efficiency of unlocking and limiting.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An unlocking and limiting device, which consists of a limiting mechanism assembly, an unlocking mechanism assembly that is connected to the limiting mechanism assembly in a matching manner, and a power push rod;

[0007] The limiting mechanism assembly includes a limiting block seat, the limiting block seat is provided with a block lifting jack, a limiting block head for protruding upward for limiting is arranged in the block lifting jack, and a lifting unit for driving the lifting is arranged at the bottom of the limiting block head;

[0008] The unlocking mechanism assembly includes an auxiliary bottom plate, a spring pin seat and a driving unit are arranged on the auxiliary bottom plate, the driving unit is used for driving the lifting unit to operate, a pin seat hole is arranged in the spring pin seat, a pin seat spring and an unlocking spring pin with one end protruding out of the pin seat hole are arranged in the pin seat hole, both ends of the pin seat spring are respectively abutted against the unlocking spring pin and the spring pin seat, the upper end of the unlocking spring pin is abutted against the lifting unit, and when the limiting block head is at the uppermost end, the elastic restoring force of the pin seat spring is greater than the pressure required for the limiting block head to descend.

[0009] By adopting the above technical solution, the driving unit can directly drive the lifting unit to operate and complete the purpose of unlocking and limiting; and the upper end of the unlocking spring pin is in contact with the lifting unit, so that the limit block head remains in the uppermost state and effectively limits the position when the external force is lost; if the limit block head is pressed or the driving unit is driven to drive the lifting unit to operate, then in the process of the limit block head descending, the pin seat spring gradually increases the reaction force acting on the lifting unit due to the gradual compression deformation, so that the limit block head quickly returns to the uppermost state after the external force is lost, and plays an effective limiting role, so that the unlocking and limiting device has the effect of improving the unlocking and limiting efficiency.

[0010] The present invention is further configured as follows: the lifting unit includes an unlocking connecting piece and a connecting rod with one end hinged to the lower end of the unlocking connecting piece, the bottom of the limit stop block head is provided with a bottom hinged body hinged to the upper end of the unlocking connecting piece, the auxiliary bottom plate is provided with a hinge seat, the upper end of the hinge seat is provided with a U-shaped transition portion rotatably connected to one end of the connecting rod away from the unlocking connecting piece, and the upper end of the unlocking spring pin abuts against the lower side of one end of the connecting rod close to the unlocking connecting piece.

[0011] By adopting the above technical solution, when the driving unit is running, the connecting rod is made to swing around the axis of the part hinged to the U-shaped transfer part, so that the unlocking connecting piece moves during the swinging, and the movement of the unlocking connecting piece drives the limit block head to move in the block lifting socket, so as to achieve the purpose of effectively driving the movement of the limit block head and realizing the unlocking or limiting, and the unlocking and limiting device has the effect of improving the unlocking and limiting efficiency.

[0012] The present invention is further configured as follows: the limit block seat is plugged with a self-locking spring pin, the limit block head is provided with at least one positioning pin hole for matching with the self-locking spring pin, and the positioning pin hole is used for the self-locking spring pin to maintain an unlocked or limited state after being inserted.

[0013] By adopting the above technical solution, after the limiting or unlocking of the limit block head is completed, the limit block head is fixed by plugging and fixing the self-locking spring pin matching the corresponding positioning pin hole to avoid the movement of the limit block head due to external force.

[0014] The present invention is further configured such that: the hinge seat is located between the spring pin seat and the drive unit, the drive unit includes a guide rail fixed on the auxiliary base plate and a linear slider matching with the guide rail, a slider plate body is arranged at the upper end of the linear slider, a downwardly inclined adapter is arranged at one end of the connecting rod away from the unlocking connecting piece, the lower side of the downwardly inclined adapter abuts against one end of the slider plate body away from the hinge seat, and a damping member is arranged on the linear slider, and the damping member is used to limit the linear slider from moving towards the end away from the hinge seat.

[0015] By adopting the above technical solution, the damping member functions to make the linear slider located at one end of the guide rail close to the hinge seat. When the linear slider moves away from the hinge seat on the guide rail under an external force, the damping member is stressed and generates an increasingly large damping force on the linear slider. Moreover, the slider plate body on the linear slider pushes the downwardly inclined adapter to move upward, and during the movement of the downwardly inclined adapter, the movement of the unlocking connecting piece and the movement of the limiting stop head are realized to complete the unlocking of the limit, so that the unlocking and limiting device has the effect of improving the unlocking and limiting efficiency.

[0016] The present invention is further configured such that: a deep groove ball bearing is rotatably connected to the downwardly inclined adapter, and a slider inclined wall facing obliquely upward is arranged at one end of the slider plate body away from the hinge seat, and the deep groove ball bearing abuts against the slider inclined wall.

[0017] By adopting the above technical solution, during the movement of the slider plate body, since the deep groove ball bearing abuts against the slider inclined wall, the deep groove ball bearing will rotate under stress and drive the downwardly inclined adapter to move upward, so as to further achieve the purpose of reducing the unlocking difficulty.

[0018] The present invention is further configured such that: the damping member includes an auxiliary plate and an inserted pin column; the auxiliary plate is fixedly connected to one end of the auxiliary base plate away from the spring pin seat and is provided with an insertion hole for one end of the inserted pin column to be inserted; a limiting ring body is arranged on the outer peripheral side wall at one end of the inserted pin column away from the insertion hole, a pin column spring sleeved between the auxiliary plate and the limiting ring body, and an unlocking connecting plate for fixedly connecting with the linear slider.

[0019] By adopting the above technical solution, during the movement of the slider plate body, the unlocking connecting plate will move towards the auxiliary plate, and then the unlocking connecting plate drives the corresponding end of the inserted pin column to gradually pass through the insertion hole, so as to compress the length of the pin column spring. Thus, the pin column elastically generates a reaction force acting on the auxiliary plate and the unlocking connecting plate, and realizes the effect of driving the unlocking connecting plate to reset, so that the unlocking and limiting device has the effect of maintaining the limit and improving the unlocking and limiting efficiency.

[0020] The present invention is further configured such that: a cam slider plate is fixedly connected to the upper end of the linear slider, the slider plate body is installed and fixed to the upper end of the cam slider plate, and the unlocking connection plate is fixedly connected to one side of the cam slider plate.

[0021] By adopting the above technical solution, the cam slider plate connects the unlocking connection plate and the slider plate body, achieving the effect of reducing the production, installation, and maintenance difficulty of the unlocking limit device.

[0022] The present invention is further configured such that: the unlocking connection plate is in an L shape, one end is connected to the cam slider plate, the other end protrudes downward and is provided with a pin hole, and the corresponding end of the inserted pin is provided with a pin insertion portion matching the pin hole.

[0023] By adopting the above technical solution, the unlocking connection plate plays an effective role in connecting the inserted pin.

[0024] The present invention is further configured such that: the downward protruding portion of the unlocking connection plate is used for fixedly connecting with the power push rod, and when there are at least two unlocking limit devices, both ends of the power push rod are respectively fixedly connected to the power push rod and the cam slider plate on two unlocking limit devices.

[0025] By adopting the above technical solution, it is convenient to simultaneously drive multiple connected unlocking limit devices, and by driving the power push rod, the movement of the slider plate body can be driven to complete unlocking, having the effect of significantly reducing the unlocking difficulty, and when the power push rod moves and drives multiple unlocking limit devices to complete unlocking, it has the effects of reducing the control difficulty and improving the unlocking efficiency.

[0026] The present invention is further configured such that: a limit installation groove is provided on the upper side of the auxiliary bottom plate, and the limit installation groove matches the bottom of the guide rail; a matching sliding groove matching the upper side of the guide rail is provided at the bottom of the linear slider.

[0027] By adopting the above technical solution, the installation and fixation difficulty of the guide rail is reduced, and the device precision of the unlocking limit device is improved, so that the unlocking limit device has the effect of improving the unlocking and limiting efficiency.

[0028] In summary, the present invention has the following beneficial effects: By pushing the unlocking connecting plate with the power push rod, while compressing the pin column spring, the slider plate body is moved. Furthermore, under the action of the inclined wall of the slider on the deep groove ball bearing, the downward-tilting adapter moves upward, so that the other end of the connecting rod moves downward to drive the limit stop head to move downward to the unlocking mechanism assembly to complete the unlocking. Also, since the pin column spring forms an elastic restoring force after compression, it drives the slider plate body to reset, so that the limit stop head can reset to the position where it plays a limiting role. At the same time, only by pressing the limit stop head and making the unlocking connecting plate overcome the acting force of the unlocking spring pin can the corresponding unlocking be completed. At this time, the pin seat spring is compressed by force and drives the limit stop head to reset to the position where it plays a limiting role. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of this embodiment;

[0030] Figure 2 is a schematic structural diagram of the unlocking mechanism assembly of this embodiment;

[0031] Figure 3 is a schematic structural diagram of the limiting mechanism assembly of this embodiment.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS: 1. Unlocking mechanism assembly; 11. Auxiliary bottom plate; 111. Limiting installation groove; 12. Spring pin seat; 121. Pin seat hole; 122. Pin seat spring; 123. Unlocking spring pin; 13. Hinge seat; 131. U-shaped adapter part; 14. Guide rail; 15. Linear slider; 151. Matching sliding groove; 16. Cam slider plate; 17. Slider plate body; 171. Inclined wall of the slider; 18. Auxiliary plate; 181. Interpenetrating hole; 19. Interpenetrating pin column; 191. Pin column spring; 192. Limiting ring body; 193. Unlocking connecting plate; 1931. Pin column insertion hole; 194. Pin column insertion part; 2. Limiting mechanism assembly; 21. Limiting stop seat; 211. Block lifting insertion hole; 22. Limiting stop head; 221. Bottom hinge body; 23. Unlocking connection piece; 24. Connecting rod; 241. Downward-tilting adapter; 25. Deep groove ball bearing; 26. Self-locking spring pin; 3. Power push rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0034] As Figure 1As shown in the figure, an unlocking and limiting device is composed of a limiting mechanism assembly 2, an unlocking mechanism assembly 1 that is connected to the limiting mechanism assembly 2 in a matching manner, and a power push rod 3. The limiting mechanism assembly 2 is used to achieve the limiting purpose of the AGV, and the unlocking mechanism assembly 1 is used to drive the limiting mechanism assembly 2 to operate so as to unlock the limit of the AGV. Among them, the power push rod 3 has the effect of making the unlocking mechanism assembly 1 operate and unlocking the limit of the AGV.

[0035] As Figure 2 , Figure 3 shown in the figure, the limiting mechanism assembly 2 includes a limiting block seat 21. A block lifting insertion hole 211 is arranged in the limiting block seat 21. A limiting block head 22 for passing through the upper end for limiting is arranged in the block lifting insertion hole 211, and a lifting unit for driving the lifting is arranged at the bottom of the limiting block head 22. Then, by driving of the lifting unit, the limiting block head 22 is made to move along the axial direction of the block lifting insertion hole 211, and the purposes of limiting and unlocking the AGV can be completed.

[0036] It should be noted that the unlocking mechanism assembly 1 includes an auxiliary bottom plate 11. The auxiliary bottom plate 11 is stationary relative to the limiting block seat 21. A spring pin seat 12 and a driving unit are arranged on the auxiliary bottom plate 11. Among them, the driving unit is used to drive the lifting unit to operate. A pin seat hole 121 is arranged in the spring pin seat 12, and a pin seat spring 122 and an unlocking spring pin 123 with one end passing through the pin seat hole 121 are arranged in the pin seat hole 121. The two ends of the pin seat spring 122 are respectively abutted against the unlocking spring pin 123 and the spring pin seat 12. At the same time, the upper end of the unlocking spring pin 123 is abutted against the lifting unit, and when the limiting block head 22 is at the uppermost end, the elastic restoring force of the pin seat spring 122 is greater than the pressure required for the limiting block head 22 to descend, so that when the limiting block head 22 lacks external force, it maintains the limiting effect under the action of the unlocking spring pin 123. Therefore, when the driving unit directly drives the lifting unit to operate and completes the purposes of unlocking and limiting, the upper end of the unlocking spring pin 123 is abutted against the lifting unit, so that the limiting block head 22 remains at the uppermost end state and is effectively limited when it loses external force. If the limiting block head 22 is pressed or the driving unit is made to drive the lifting unit to operate, then during the descent of the limiting block head 22, the pin seat spring 122 gradually compresses and deforms, and the reaction force acting on the lifting unit gradually increases, so that after the limiting block head 22 loses external force, it quickly returns to the uppermost end state and plays an effective limiting role, so that the unlocking and limiting device has the effect of improving the unlocking and limiting efficiency.

[0037] As Figure 2 , Figure 3As shown in the figure, the lifting unit includes an unlocking connecting piece 23 and a connecting rod 24 with one end hinged to the lower end of the unlocking connecting piece 23. A bottom hinge body 221 hinged to the upper end of the unlocking connecting piece 23 is arranged at the bottom of the limit stop head 22. Correspondingly, a hinge seat 13 is arranged on the auxiliary bottom plate 11. A U-shaped transfer part 131 rotatably connected to the end of the connecting rod 24 away from the unlocking connecting piece 23 is arranged at the upper end of the hinge seat 13. The upper end of the unlocking spring pin 123 abuts against the lower side of the end of the connecting rod 24 close to the unlocking connecting piece 23. Thus, when the driving unit operates, the connecting rod 24 swings with the axis of the part hinged to the U-shaped transfer part 131 as the axis. During the swing, the unlocking connecting piece 23 moves, and the limit stop head 22 is driven to move in the stop lifting jack 211 during the movement of the unlocking connecting piece 23, so as to effectively drive the movement of the limit stop head 22 and achieve the purpose of unlocking or limiting, and the unlocking and limiting device has the effect of improving the unlocking and limiting efficiency.

[0038] Among them, a self-locking spring pin 26 is inserted into the limit stop seat 21. The limit stop head 22 is provided with at least one positioning pin hole for matching with the self-locking spring pin 26. The positioning pin hole is used for the self-locking spring pin 26 to be inserted to maintain the unlocking or limiting state. Therefore, after the limit stop head 22 is limited or unlocked, the self-locking spring pin 26 is inserted and fixed by matching with the corresponding positioning pin hole to fix the limit stop head 22 and prevent the limit stop head 22 from moving due to the action of external force. It should be noted that the hinge seat 13 is located between the spring pin seat 12 and the driving unit. The driving unit includes a guide rail 14 fixed on the auxiliary bottom plate 11 and a linear slider 15 matching with the guide rail 14. A slider plate body 17 is arranged at the upper end of the linear slider 15, and a downward-tilting transfer body 241 is arranged at the end of the connecting rod 24 away from the unlocking connecting piece 23. The lower side of the downward-tilting transfer body 241 abuts against the end of the slider plate body 17 away from the hinge seat 13. And a damping member is arranged on the linear slider 15. The damping member is used to limit the linear slider 15 from moving towards the end away from the hinge seat 13. Therefore, the damping member makes the linear slider 15 located at the end of the guide rail 14 close to the hinge seat 13. When the linear slider 15 moves away from the hinge seat 13 on the guide rail 14 under the action of external force, the damping member is stressed and generates an increasingly large damping force on the linear slider 15. The slider plate body 17 on the linear slider 15 pushes the downward-tilting transfer body 241 to move upward, and during the movement of the downward-tilting transfer body 241, the movement of the unlocking connecting piece 23 and the movement of the limit stop head 22 are realized to complete the unlocking of the limit, so that the unlocking and limiting device has the effect of improving the unlocking and limiting efficiency.

[0039] In order to further reduce the difficulty of unlocking, the downward adapter 241 is rotatably connected with a deep groove ball bearing 25, and a slider inclined wall 171 facing obliquely upward is provided at one end of the slider plate body 17 away from the hinge seat 13. When the deep groove ball bearing 25 abuts against the slider inclined wall 171, the movement of the slider plate body 17 will cause the deep groove ball bearing 25 to rotate under force due to the abutment between the deep groove ball bearing 25 and the slider inclined wall 171, and drive the downward adapter 241 to move upward, converting the direct contact friction into rolling friction and significantly reducing the friction resistance.

[0040] In order to improve the device precision of the unlocking limit device, a limit installation groove 111 is provided on the upper side of the auxiliary bottom plate 11. The limit installation groove 111 matches the bottom of the guide rail 14. And a matching sliding groove 151 that matches the upper side of the guide rail 14 is provided at the bottom of the linear slider 15, thereby effectively reducing the installation and fixing difficulty of the guide rail 14, so that the unlocking limit device has the effect of improving the unlocking and limiting efficiency.

[0041] Among them, the damping member includes an auxiliary plate 18 and an inserting pin column 19. The auxiliary plate 18 is fixedly connected to one end of the auxiliary bottom plate 11 away from the spring pin seat 12, and an inserting hole 181 for inserting one end of the inserting pin column 19 is provided. A limiting ring body 192 is provided on the outer peripheral side wall at one end of the inserting pin column 19 away from the inserting hole 181, a pin column spring 191 sleeved on the part of the inserting pin column 19 between the auxiliary plate 18 and the limiting ring body 192, and an unlocking connecting plate 193 for fixedly connecting with the linear slider 15. Therefore, during the movement of the slider plate body 17, the unlocking connecting plate 193 will move towards the auxiliary plate 18, and then the unlocking connecting plate 193 drives the corresponding end of the inserting pin column 19 to gradually pass through the inserting hole 181, so as to compress the length of the pin column spring 191, so that the pin column elastically generates a reaction force acting on the auxiliary plate 18 and the unlocking connecting plate 193, and realizes the effect of driving the unlocking connecting plate 193 to reset, so that the unlocking limit device has the effect of maintaining the limit and improving the unlocking and limiting efficiency.

[0042] In order to achieve the effect of reducing the production, installation, and maintenance difficulty of the unlocking limit device, a cam slider plate 16 is fixedly connected to the upper end of the linear slider 15. A slider plate body 17 is installed and fixed on the upper end of the cam slider plate 16, and an unlocking connecting plate 193 is fixedly connected to one side of the cam slider plate 16. The unlocking connecting plate 193 is L-shaped, with one end connected to the cam slider plate 16 and the other end protruding downward and provided with a pin insertion hole 1931. The corresponding end of the insertion pin 19 is provided with a pin insertion portion 194 that matches the pin insertion hole 1931, so that the unlocking connecting plate 193 can effectively connect the insertion pin 19. At the same time, the downward protruding part of the unlocking connecting plate 193 is used to be fixedly connected to the power push rod 3. When there are at least two unlocking limit devices, both ends of the power push rod 3 are fixedly connected to the power push rod 3 and the cam slider plate 16 on two unlocking limit devices respectively, so as to facilitate driving multiple connected unlocking limit devices at the same time. Through the drive of the power push rod 3, the movement of the slider plate body 17 can be realized to complete the unlocking, which has the effect of significantly reducing the unlocking difficulty. And when the power push rod 3 moves and drives multiple unlocking limit devices to complete the unlocking, it has the effects of reducing the control difficulty and improving the unlocking efficiency.

[0043] In summary, in this application, the power push rod 3 is used to push the unlocking connecting plate 193 to move. While compressing the pin spring 191, the slider plate body 17 is made to move. Then, under the action of the inclined wall 171 of the slider on the deep groove ball bearing 25, the downward tilting adapter 241 moves upward, so that the other end of the connecting rod 24 moves downward to drive the limit stop head 22 to move downward to the unlocking mechanism assembly 1 at the lower end to complete the unlocking. Also, because the pin spring 191 forms an elastic restoring force after being compressed, it drives the slider plate body 17 to reset, so that the limit stop head 22 can reset to the position where it plays a limiting role. At the same time, only by pressing the limit stop head 22 and making the unlocking connecting plate 193 overcome the acting force of the unlocking spring pin 123, the corresponding unlocking can be completed. At this time, the pin seat spring 122 is compressed by the force and drives the limit stop head 22 to reset to the position where it plays a limiting role.

[0044] The "first", "second", "third", "fourth", etc. (if any) involved in this application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments described here can be implemented in an order other than that shown or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, or devices.

[0045] It should be noted that in this application, the descriptions involving "first", "second", etc. are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0046] Specific examples are used herein to illustrate the principles and implementation manners of this application. The descriptions of the above embodiments are only for helping to understand the method and its core idea of this application; meanwhile, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. An unlocking limit device, characterized in that: It is composed of a limiting mechanism component (2), an unlocking mechanism component (1) matched and connected to the limiting mechanism component (2), and a power push rod (3); The limit mechanism assembly (2) comprises a limit block seat (21), the limit block seat (21) is provided with a block lifting socket (211), a limit block head (22) for passing through the upper end to limit the position is provided in the block lifting socket (211), and a lifting unit for driving the lifting is provided at the bottom of the limit block head (22); The unlocking mechanism assembly (1) comprises an auxiliary base plate (11), the auxiliary base plate (11) being provided with a spring pin seat (12) and a driving unit, the driving unit being used to drive the lifting unit to operate, the spring pin seat (12) being provided with a pin seat hole (121), the pin seat hole (121) being provided with a pin seat spring (122) and an unlocking spring pin (123) with one end extending out of the pin seat hole (121), the two ends of the pin seat spring (122) being respectively in contact with the unlocking spring pin (123) and the spring pin seat (12), the upper end of the unlocking spring pin (123) being in contact with the lifting unit, The lifting unit abuts against the limit stop block head (22), and when the limit stop block head (22) is at the uppermost end, the elastic restoring force of the pin seat spring (122) is greater than the pressure required for the limit stop block head (22) to descend; the lifting unit comprises an unlocking connecting piece (23) and a connecting rod (24) one end of which is hinged to the lower end of the unlocking connecting piece (23); the bottom of the limit stop block head (22) is provided with a bottom hinged body (221) hinged to the upper end of the unlocking connecting piece (23); the auxiliary bottom plate (11) is provided with a hinge seat (13); the upper end of the hinge seat (13) is provided with a hinged body (221) which is hinged to the connecting rod (24) away from the unlocking The U-shaped transition part (131) is rotatably connected to one end of the connecting piece (23), and the upper end of the unlocking spring pin (123) abuts against the lower side of one end of the connecting rod (24) close to the unlocking connecting piece (23); the limit stop block seat (21) is plugged with a self-locking spring pin (26), and the limit stop block head (22) is provided with at least one positioning pin hole for matching with the self-locking spring pin (26), and the positioning pin hole is used for the self-locking spring pin (26) to maintain the unlocking or limiting state after being inserted; the hinge seat (13) is located between the spring pin seat (12) and the drive unit, and the drive unit includes The invention comprises a guide rail (14) fixed on the auxiliary base plate (11) and a linear slider (15) matched with the guide rail (14); a slider plate body (17) is arranged at the upper end of the linear slider (15); a downward-inclined transition body (241) is arranged at the end of the connecting rod (24) away from the unlocking connecting piece (23); the lower side of the downward-inclined transition body (241) abuts against the end of the slider plate body (17) away from the hinge seat (13); and the linear slider (15) is provided with a damping member, which is used to limit the linear slider (15) from moving toward the end away from the hinge seat (13).

2. The unlocking and limiting device according to claim 1, wherein: The downwardly inclined adapter (241) is rotatably connected to a deep groove ball bearing (25). One end of the slider plate body (17) away from the hinge seat (13) is provided with a slider inclined wall (171) facing obliquely upward, and the deep groove ball bearing (25) abuts against the slider inclined wall (171).

3. An unlocking and limiting device according to claim 1, characterized in that: The damping member includes an auxiliary plate (18) and an inserted pin column (19); the auxiliary plate (18) is fixedly connected to one end of the auxiliary bottom plate (11) away from the spring pin seat (12), and is provided with an insertion hole (181) for one end of the inserted pin column (19) to be inserted; one end of the inserted pin column (19) away from the insertion hole (181) is provided with a limiting ring body (192) on the outer peripheral side wall, a pin column spring (191) sleeved between the auxiliary plate (18) and the limiting ring body (192), and an unlocking connecting plate (193) for fixedly connecting with the linear slider (15).

4. An unlocking and limiting device according to claim 3, characterized in that: The upper end of the linear slider (15) is fixedly connected with a cam slider plate (16), the slider plate body (17) is fixedly installed on the upper end of the cam slider plate (16), and the unlocking connecting plate (193) is fixedly connected to one side of the cam slider plate (16).

5. An unlocking and limiting device according to claim 4, characterized in that: The unlocking connecting plate (193) is in an L shape, one end is connected to the cam slider plate (16), the other end protrudes downward and is provided with a pin column insertion hole (1931), and the corresponding end of the inserted pin column (19) is provided with a pin column insertion portion (194) matching the pin column insertion hole (1931).

6. The unlocking and limiting device according to claim 5, characterized in that: The part of the unlocking connecting plate (193) protruding downward is used for fixedly connecting with the power push rod (3). When there are at least two unlocking limiting devices, both ends of the power push rod (3) are respectively fixedly connected to the power push rod (3) and the cam slider plate (16) on the two unlocking limiting devices.

7. An unlocking and limiting device according to claim 3, characterized in that: A limiting installation groove (111) is provided on the upper side of the auxiliary bottom plate (11), and the limiting installation groove (111) matches the bottom of the guide rail (14); a matching sliding groove (151) matching the upper side of the guide rail (14) is provided at the bottom of the linear slider (15).

Images