Locking and releasing device based on cam type structure

Abstract

The invention relates to a locking and releasing device based on a cam type structure, the locking and releasing device comprises a locking base, two fasteners, a cam, two sliding shafts, a pin puller, a pressing rod and a load connecting mechanism, the upper end of the pressing rod is connected with the load connecting mechanism, and the lower end of the pressing rod is located in the locking base; the lower ends of the two fastening pieces can be installed on the inner side of the bottom wall of the locking base in a left-right sliding mode, and the upper ends of the two fastening pieces are provided with clamping sections clamped to the lower ends of the pressing rods in a matched mode. A cam shaft is arranged on the inner side of the bottom wall of the locking base, and the cam is rotationally connected to the cam shaft. The two sliding shafts penetrate through the two fastening pieces in a left-right sliding mode, each sliding shaft is sleeved with an unlocking spring, the two ends of each unlocking spring abut against the two fastening pieces respectively, the left ends of the two sliding shafts abut against the fastening piece on the left side in a limited mode, and the right ends of the two sliding shafts are connected and positioned through a connecting check block. The two sides of the cam abut against the connecting check block and the right side fastening piece respectively. The pin puller is installed on the locking base and can clamp and release the cam.

Description

Technical Field

[0001] The present invention relates to the field of aviation and aerospace related technologies, and in particular to a locking and releasing device based on a cam structure. Background Art

[0002] The connection and release of payloads and vehicles are widely used, such as the stages of multi-stage rockets, satellites and launch vehicles, satellites and spacecraft, solar wings and spacecraft, unfolded antennas and spacecraft, etc. At present, the methods used are to connect and release based on pyrotechnic devices. Common pyrotechnic connection and release devices include compression seats based on explosive bolts, wrapping belts based on explosive bolts or pyrotechnic cutters, compression seats based on pyrotechnic separation nuts, compression seats based on pyrotechnic cutters, etc. The common feature of these compression and release devices is that they bear the connection force. In order to ensure the connection stiffness, the connection force often reaches thousands or even tens of thousands of N. The pyrotechnics as the main components themselves need to be destroyed, so they must be unlocked by the huge explosive impact force of gunpowder. This method is one-time use, resulting in high cost, and the explosive impact force is used to unlock, which is easy to cause damage to the spacecraft. In addition, the existing pyrotechnic device solutions have many parts and are complicated to assemble. In addition, due to the high price of pyrotechnics and the inability to be reused, ground tests can only be replaced with new devices after each use, which is not conducive to the development of commercial aerospace. Summary of the invention

[0003] In order to solve one or more technical problems existing in the prior art, the present invention provides a locking and releasing device based on a cam structure.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a locking release device based on a cam structure, comprising a locking base, two fastening members, a cam, two sliding shafts, a pin puller, a clamping rod and a load connection mechanism, wherein the upper end of the clamping rod is connected to the load connection mechanism, and the lower end of the clamping rod is located in the locking base;

[0005] The lower ends of the two fastening pieces can be slidably installed on the inner side of the bottom wall of the locking base, and the upper ends of the two fastening pieces are provided with a clamping section that is adapted to be clamped with the lower end of the pressing rod; a cam shaft is provided on the inner side of the bottom wall of the locking base, and the cam is rotatably connected to the cam shaft; the two sliding shafts can slide left and right and pass through the two fastening pieces, and each sliding shaft is sleeved with an unlocking spring, and the two ends of the unlocking spring respectively abut against the two fastening pieces, and the left ends of the two sliding shafts are limitedly abutted on the fastening piece on the left, and the right ends of the two sliding shafts are connected and positioned by connecting blocks, and the two sides of the cam respectively abut against the connecting block and the fastening piece on the right; the pin puller is installed on the locking base and can realize the clamping and release of the cam;

[0006] When in the locked state, the pin puller clamps the cam, the two fastening parts move together and clamp the clamping rod in place through the clamping section, and the two unlocking springs are in a compressed state; when in the unlocked state, the pin puller releases the cam, the two fastening parts move away and release the clamping rod from being clamped in place.

[0007] The beneficial effects of the present invention are as follows: the locking release device based on the cam structure of the present invention adopts non-explosive unlocking, so that the impact of the overall unlocking is much smaller than that of the explosive unlocking device. In addition, the number of parts of the device is small, which makes the overall installation much simpler, and the weight is much lighter, which is more friendly to the aerospace field. The structure of the cam and the sliding shaft is adopted to make the approach and separation between the two fastening parts smoother and more stable.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the front and rear sides of the fastening member are respectively provided with connecting sleeves that penetrate left and right, and the two sliding shafts are respectively slidably sleeved in the two connecting sleeves.

[0010] The beneficial effect of adopting the above further solution is that by arranging connecting sleeves on the front and rear sides of the fastening member, it is convenient to slide the sliding shaft and the fastening member together.

[0011] Furthermore, a limiting sleeve is provided at the left end of the sliding shaft, and the limiting sleeve abuts against the fastening member on the left side; a limiting nut is provided at the right end of the sliding shaft, and the limiting nut abuts against the connecting block.

[0012] Further, the peripheral side surface of the cam includes two oppositely arranged driving ends and two oppositely arranged unlocking ends, and the length between the two driving ends is greater than the length between the two unlocking ends;

[0013] In the locked state, the two driving ends of the cam respectively abut against the connection block and the fastening piece on the right side; in the unlocked state, the two unlocking ends of the cam respectively abut against the connection block and the fastening piece on the right side.

[0014] Furthermore, a shaft sleeve is connected to the lower end of the cam, a driving rod is connected to the shaft sleeve, the cam and the shaft sleeve are both rotatably connected to the camshaft, and the pin puller is adapted to be engaged with the driving rod.

[0015] The beneficial effects of adopting the above further solution are: by providing the shaft sleeve, the stable sleeve arrangement between the cam and the camshaft is facilitated; and the provision of the drive rod facilitates the cooperation with the pin puller.

[0016] Furthermore, an assembly seat is fixed to the inner side of the bottom wall of the locking base, and a sliding groove is provided on the assembly seat to pass through the left and right sides. A sliding block is provided at the lower end of the two fastening members, and the sliding block is adapted to be slidably installed in the sliding groove.

[0017] The beneficial effect of adopting the above further solution is that by providing a slider and a slide groove, the fastening member can stably slide left and right along the slide groove on the assembly seat.

[0018] Furthermore, the slide groove is a trapezoidal structural groove, the sliding block is a trapezoidal structural block, and balls are provided between the side wall and / or bottom wall of the slide groove and the fastening member.

[0019] The beneficial effect of adopting the above further solution is that by providing the ball bearings, the sliding block can slide more smoothly in the sliding groove.

[0020] Furthermore, a ball groove extending left and right is provided on the side wall and / or bottom wall of the slide groove, and a ball is rollingly provided on the lower end side wall and / or bottom wall of the fastening member, and the ball is adapted to be arranged in the corresponding ball groove.

[0021] The beneficial effect of adopting the above further solution is that by providing the ball groove, the movement of the slider is made more stable and reliable, and the ball is prevented from falling out.

[0022] Furthermore, a limiting step is provided on the circumferential side of the lower end of the clamping rod, and the step surface of the limiting step is arranged to be gradually inclined downward from the inside to the outside, and the lower surface of the clamping section is adapted to be clamped with the step surface of the limiting step.

[0023] The beneficial effect of adopting the above-mentioned further scheme is: the fastening parts and the clamping rod are used for clamping and positioning, and the step surface of the limiting step is arranged to be gradually tilted downward from the inside to the outside, which successfully reduces the large clamping force greatly, so that the pin pulling force required by the pin puller is very small, and the unlocking and releasing is not only achieved by the pulling force of the unlocking spring.

[0024] Furthermore, the upper end of the locking base is an open structure, the lower end of the load connection mechanism is adapted to be disposed in the open structure and the peripheral side wall abuts against the inner side wall of the open structure;

[0025] A travel switch is arranged on the outer side wall of the locking base, and in the locking state, the lower surface of the load connecting mechanism presses the travel switch.

[0026] The beneficial effect of adopting the above further solution is that since there is surface-to-surface contact between the load connection mechanism and the locking base, the offset angle is very small after unlocking and separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a side structural schematic diagram of the unlocked state of the locking release device based on the cam structure of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the middle BB;

[0029] Figure 3 It is a schematic diagram of the front view of the locking and releasing device based on the cam structure of the present invention in the unlocked state;

[0030] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of EE;

[0031] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure of FF;

[0032] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure of the middle GG;

[0033] Figure 7 It is a side structural schematic diagram of the locking state of the locking release device based on the cam structure of the present invention;

[0034] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of the middle BB;

[0035] Fig. 9 It is a schematic diagram of the front view of the locking state of the locking release device based on the cam structure of the present invention;

[0036] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure of EE;

[0037] Fig.11 for Fig. 9 Schematic diagram of the cross-sectional structure of FF;

[0038] Fig.12 for Fig. 9 Schematic diagram of the cross-sectional structure of the middle GG;

[0039] Fig.13 It is a side view structural schematic diagram of the load connection mechanism coming off the locking base after the locking release device based on the cam structure of the present invention is unlocked;

[0040] Fig.14 for Fig.13 Schematic diagram of the cross-sectional structure of AA;

[0041] Fig.15 It is a schematic diagram of the front view of the structure of the load connection mechanism being released from the locking base after the locking release device based on the cam structure of the present invention is unlocked;

[0042] Fig.16 It is a schematic diagram of the top view of the internal structure of the locking release device based on the cam structure of the present invention in the locked state;

[0043] Fig.17It is a schematic diagram of the top view of the internal structure of the locking and releasing device based on the cam structure of the present invention in the unlocked state;

[0044] Fig.18 is a schematic diagram of the three-dimensional structure of the fastening member;

[0045] Fig.19 It is a schematic diagram of the three-dimensional structure of the cam.

[0046] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0047] 1. Locking base; 11. Assembly seat; 12. Slideway; 13. Ball bearing; 14. Camshaft;

[0048] 2. Fastening piece; 21. Clamping section; 22. Connecting sleeve; 23. Sliding block;

[0049] 3. Cam; 31. Driving end; 32. Bushing; 33. Driving rod;

[0050] 4. Sliding shaft; 41. Unlocking spring; 42. Connecting block; 43. Limit sleeve; 44. Limit nut;

[0051] 5. Pin puller;

[0052] 6. Clamping rod; 61. Limiting step; 62. Clamping nut;

[0053] 7. Load connecting mechanism; 8. Travel switch. DETAILED DESCRIPTION

[0054] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0055] like Figures 1 to 19 As shown, a locking and releasing device based on a cam structure of this embodiment includes a locking base 1, two fastening members 2, a cam 3, two sliding shafts 4, a pin puller 5, a clamping rod 6 and a load connecting mechanism 7, wherein the upper end of the clamping rod 6 is connected to the load connecting mechanism 7, and the lower end of the clamping rod 6 is located in the locking base 1;

[0056] The lower ends of the two fastening members 2 can be slidably installed on the inner side of the bottom wall of the locking base 1, and the upper ends of the two fastening members 2 are provided with a clamping section 21 that is adapted to be clamped with the lower end of the pressing rod 6; a cam shaft 14 is provided on the inner side of the bottom wall of the locking base 1, and the cam 3 is rotatably connected to the cam shaft 14; the two sliding shafts 4 slide left and right and pass through the two fastening members 2, and each of the sliding shafts 4 is sleeved with an unlocking spring 41, and the two ends of the unlocking spring 41 respectively abut against the two fastening members 2, and the left ends of the two sliding shafts 4 are limitedly abutted on the fastening member 2 on the left, and the right ends of the two sliding shafts 4 are connected and positioned by a connecting block 42, and the two sides of the cam 3 respectively abut against the connecting block 42 and the fastening member 2 on the right; the pin puller 5 is installed on the locking base 1 and can realize the clamping and release of the cam 3;

[0057] When in the locked state, the pin puller 5 clamps the cam 3, the two fastening members 2 move closer and clamp the clamping rod 6 through the clamping section 21, and the two unlocking springs 41 are in a compressed state; when in the unlocked state, the pin puller 5 releases the cam 3, the two fastening members 2 move away and release the clamping position of the clamping rod 6.

[0058] Specifically, the load connection mechanism 7 may adopt a load connection flange, and the upper end of the clamping rod 6 may be locked and fixed to the middle part of the load connection mechanism 7 by a clamping nut 62 .

[0059] like Figure 2 As shown, the fastening member 2 of this embodiment adopts a 7-shaped structure.

[0060] like Figure 6 , Fig.12 , Figure 16 to Figure 18 As shown, the front and rear sides of the fastening member 2 of this embodiment are respectively provided with connecting sleeves 22 that penetrate left and right, and the two sliding shafts 4 are respectively slidably sleeved in the two connecting sleeves 22. By providing the connecting sleeves on the front and rear sides of the fastening member, it is convenient to slide the sliding shaft and the fastening member.

[0061] like Fig.14 As shown, a limiting sleeve 43 is provided at the left end of the sliding shaft 4 of this embodiment, and the limiting sleeve 43 abuts against the fastening member 2 on the left side; a limiting nut 44 is provided at the right end of the sliding shaft 4, and the limiting nut 44 abuts against the connecting block 42.

[0062] like Fig.16 and Fig.17 As shown, the circumferential surface of the cam 3 of this embodiment includes two oppositely arranged driving ends 31 and two oppositely arranged unlocking ends, and the length between the two driving ends 31 is greater than the length between the two unlocking ends; Fig.16As shown, in the locked state, the two driving ends 31 of the cam 3 respectively abut against the connecting block 42 and the fastening member 2 on the right side; Fig.17 As shown, in the unlocked state, the two unlocking ends of the cam 3 respectively abut the connecting block 42 and the right fastening member 2. The cam in the device is close to the dead point in the locked state, so the stability in the locked state is high and the required unlocking force is very small.

[0063] like Figure 2 , Figure 8 , Fig.12 , Fig.14 As shown, the lower end of the cam 3 of this embodiment is connected to a sleeve 32, and the sleeve 32 is connected to a drive rod 33. The cam 3 and the sleeve 32 are both rotatably connected to the camshaft 14, and the pin puller 5 is adapted to be engaged with the drive rod 33. The sleeve is provided to facilitate the stable sleeve arrangement between the cam and the camshaft; the drive rod is provided to facilitate the cooperation with the pin puller. The upper end of the cam 3 can limit the cam and the sleeve 32 on the camshaft 14 through the cooperation of a limit bolt and a limit washer. The cam 3 and the sleeve 32 are an integrated structure, and the sleeve 32 can adopt a cylindrical structure.

[0064] like Figure 2 , Figure 5 , Figure 6 , Figure 8 , Fig.11 , Fig.12 , Fig.14 As shown, the inner side of the bottom wall of the locking base 1 of this embodiment is fixed with an assembly seat 11 by bolts, and the assembly seat 11 is provided with a slide groove 12 that passes through left and right, and the lower ends of the two fastening members 2 are provided with a slider 23, and the slider 23 is adapted to be slidably installed in the slide groove 12. By providing the slider and the slide groove, the fastening member can stably slide left and right along the slide groove on the assembly seat.

[0065] like Figure 5 , Figure 6 , Fig.11 , Fig.12 As shown, the slide groove 12 of this embodiment is a trapezoidal structure groove, the slider 23 is a trapezoidal structure block, and a ball 13 is provided between the side wall and / or bottom wall of the slide groove 12 and the fastening member 2. By providing the ball, the slider can slide more smoothly in the slide groove.

[0066] like Figure 5 , Figure 6 , Fig.11 , Fig.12As shown, the side wall and / or bottom wall of the slide groove 12 of this embodiment are provided with ball grooves extending left and right, and the lower side wall and / or bottom wall of the fastening member 2 are provided with balls 13 rollingly, that is, the side wall and / or bottom wall of the slider 23 are provided with balls 13 rollingly, and the balls 13 are adapted to be provided in the corresponding ball grooves. By providing the ball grooves, the movement of the slider is made more stable and reliable, and the balls are prevented from falling out.

[0067] like Figure 2 , Figure 8 , Fig.14 As shown, a limiting step 61 is provided on the circumferential side of the lower end of the clamping rod 6 of this embodiment, and the step surface of the limiting step 61 is arranged to be gradually inclined downward from the inside to the outside, and the lower surface of the clamping section 21 is adapted to be clamped with the step surface of the limiting step 61. The fastening member is used to clamp and position the clamping rod, and the step surface of the limiting step is arranged to be gradually inclined downward from the inside to the outside, which successfully reduces the large clamping force, so that the pin pulling force required by the pin puller is very small, and the unlocking is not only unlocked by the pulling force of the unlocking spring when unlocking and releasing.

[0068] like Figure 2 , Figure 5 , Figure 6 , Figure 8 , Fig.11 , Fig.12 , Fig.14 As shown, the upper end of the locking base 1 of this embodiment is an open structure, the lower end of the load connection mechanism 7 is adapted to be disposed in the open structure and the peripheral side wall abuts against the inner side wall of the open structure;

[0069] like Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Fig. 9 , Fig.11 As shown, a travel switch 8 is provided on the outer side wall of the locking base 1 of this embodiment, and in the locked state, the lower surface of the load connection mechanism 7 presses the travel switch 8. Since there is surface contact between the load connection mechanism and the locking base, the offset angle is very small after unlocking and separation.

[0070] The pin puller 5 of the present embodiment can be any type of pin puller, including a memory alloy pin puller, an electromagnetic pin puller, etc.

[0071] In this embodiment, the locking release device based on the cam structure is in the locked state, such as Figure 7 to Figure 12 , Fig.16As shown, first, the locking base is fixedly connected to the lower fixing plate or the fixed load by screws, the fixed load or other objects (including the satellite body or other loads) are fixedly connected to the load connection mechanism by screws, the assembly seat and the locking base are fixedly connected by screws, and the pin of the pin puller blocks the cam, wherein the two unlocking springs are in a compressed state at this time, and the two fastening members are clamped in the locking base through the triangular surface of the trapezoidal structural block, and there are balls at the contact surfaces between the two fastening members and the locking base, so that the sliding friction of the two fastening members in the assembly seat is reduced, making it easier to slide, and because the long side of the cam blocks the connecting block and the right fastening member, the two fastening members are in a relatively close position. The position is close, further, the step surface of the limiting step of the "⊥"-shaped block at the lower end of the pressing rod and the pressing surfaces of the two fastening members are pressed against each other, so that the step surface of the limiting step of the "⊥"-shaped block at the lower end of the pressing rod and the pressing surfaces of the two fastening members are pressed against each other, and the pressing rod presses the load connection mechanism and the locking base through the pressing nut. Since the long side of the cam (i.e., the two driving ends) blocks the connection block and the right fastening member, the cam is close to the dead point, which can make the unlocking force required by the pin puller smaller. In addition, since the slide groove of the assembly seat and the sliders at the lower ends of the two fastening members are mutually stuck in an inverted triangle, the entire locking base can bear a large tensile force. That is, it can bear a larger load tension.

[0072] In this embodiment, the locking release device based on the cam structure is in the unlocked state, such as Figure 1 to Figure 6 , Figure 13 to Figure 15 , Fig.17 The two latches are driven by the unlocking spring to slide outwards along the mounting seat, so that the clamping force of the two latches and the clamping rod is unlocked and released, thereby achieving the unlocking effect. The two latches are connected to the sliding shaft by the unlocking spring, so that the two latches slide outwards synchronously due to the unlocking spring and the connection between the connecting block and the sliding shaft. In addition, since there is a ball between the latch and the slide groove, the friction force of its sliding is greatly reduced, which is more conducive to unlocking and releasing. At the same time, since there is a small angle at the clamping surface between the latch and the clamping rod, the small angle between the latch and the clamping rod makes the latch have an outward unlocking force when unlocking and releasing, so that the unlocking and releasing can be unlocked not only by the pulling force of the unlocking spring, thereby making it easier to unlock the latch and the clamping rod. Since the slider at the lower end of the fastening member and the slide groove on the assembly seat are mutually locked in a trapezoidal fit, no deflection motion other than linear motion will be generated.

[0073] The locking release device based on the cam structure of this embodiment adopts non-explosive unlocking, so that the impact of the overall unlocking is much smaller than that of the explosive unlocking device. In addition, the number of parts of the device is small, which makes the overall installation much simpler, and the weight is much lighter, which is more friendly to the aerospace field. The structure of the cam and the sliding shaft makes the approach and separation between the two fastening parts smoother and more stable.

[0074] In the description of the present invention, it should 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", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] 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.

[0079] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A locking and releasing device based on a cam structure, characterized in that: It includes a locking base, two fastening members, a cam, two sliding shafts, a pin puller, a clamping rod and a load connecting mechanism, wherein the upper end of the clamping rod is connected to the load connecting mechanism, and the lower end of the clamping rod is located in the locking base; The lower ends of the two fastening pieces can be slidably installed on the inner side of the bottom wall of the locking base, and the upper ends of the two fastening pieces are provided with a clamping section that is adapted to be clamped with the lower end of the pressing rod; a cam shaft is provided on the inner side of the bottom wall of the locking base, and the cam is rotatably connected to the cam shaft; the two sliding shafts can slide left and right and pass through the two fastening pieces, and each sliding shaft is sleeved with an unlocking spring, and the two ends of the unlocking spring respectively abut against the two fastening pieces, and the left ends of the two sliding shafts are limitedly abutted on the fastening piece on the left, and the right ends of the two sliding shafts are connected and positioned by connecting blocks, and the two sides of the cam respectively abut against the connecting block and the fastening piece on the right; the pin puller is installed on the locking base and can realize the clamping and release of the cam; When in the locked state, the pin puller clamps the cam, the two fastening parts move together and clamp the clamping rod in place through the clamping section, and the two unlocking springs are in a compressed state; when in the unlocked state, the pin puller releases the cam, the two fastening parts move away and release the clamping rod from being clamped in place.

2. A locking and releasing device based on a cam structure according to claim 1, characterized in that: The front and rear sides of the fastening member are respectively provided with connecting sleeves which penetrate left and right, and the two sliding shafts are respectively slidably sleeved in the two connecting sleeves.

3. The locking and releasing device based on a cam structure according to claim 1, characterized in that: A limiting sleeve is arranged at the left end of the sliding shaft, and the limiting sleeve abuts against the fastening member on the left side; a limiting nut is arranged at the right end of the sliding shaft, and the limiting nut abuts against the connecting stopper.

4. The locking and releasing device based on a cam structure according to claim 1, characterized in that: The circumferential side surface of the cam includes two oppositely arranged driving ends and two oppositely arranged unlocking ends, and the length between the two driving ends is greater than the length between the two unlocking ends; In the locked state, the two driving ends of the cam respectively abut against the connection block and the fastening piece on the right side; in the unlocked state, the two unlocking ends of the cam respectively abut against the connection block and the fastening piece on the right side.

5. The locking and releasing device based on a cam structure according to claim 1, characterized in that: The lower end of the cam is connected with a shaft sleeve, and the shaft sleeve is connected with a driving rod. The cam and the shaft sleeve are both rotatably connected to the camshaft, and the pin puller is adapted to be clamped with the driving rod.

6. The locking and releasing device based on a cam structure according to claim 1, characterized in that: An assembly seat is fixed on the inner side of the bottom wall of the locking base, and a sliding groove is provided on the assembly seat to pass through the left and right sides. The lower ends of the two fastening members are provided with sliding blocks, and the sliding blocks are adapted to be slidably installed in the sliding groove.

7. A locking and releasing device based on a cam structure according to claim 6, characterized in that: The slide groove is a trapezoidal structural groove, the sliding block is a trapezoidal structural block, and a ball bearing is arranged between the side wall and / or the bottom wall of the slide groove and the fastening member.

8. The locking and releasing device based on a cam structure according to claim 7, characterized in that: The side walls and / or bottom wall of the slide groove are provided with ball grooves extending left and right, and the lower end side walls and / or bottom wall of the fastening member are provided with balls for rolling, and the balls are adapted to be arranged in the corresponding ball grooves.

9. The locking and releasing device based on a cam structure according to claim 1, characterized in that: A limiting step is provided on the circumferential side of the lower end of the clamping rod, and the step surface of the limiting step is arranged to be gradually inclined downward from the inside to the outside, and the lower surface of the clamping section is adapted to be clamped with the step surface of the limiting step.

10. The locking and releasing device based on a cam structure according to claim 1, characterized in that: The upper end of the locking base is an open structure, the lower end of the load connection mechanism is adapted to be disposed in the open structure and the peripheral side wall abuts against the inner side wall of the open structure; A travel switch is arranged on the outer side wall of the locking base, and in the locking state, the lower surface of the load connecting mechanism presses the travel switch.

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