Clamping self-locking device

Abstract

The clamping self-locking device comprises a pull rod assembly and a limiting assembly which are arranged on a rack assembly, the tail end of the pull rod assembly is connected with a clamping assembly, and the pull rod assembly can drive the clamping assembly to move up and down and enable the tail end of the clamping assembly to be opened or closed. The limiting assembly has a limiting state matched with the pull rod assembly to limit movement of the pull rod assembly. The pull rod assembly is pushed downwards, the clamping assembly moves downwards, the tail end of the clamping assembly is opened, when the opening angle is larger than the width of the servo motor, the pull rod assembly is pulled upwards, the tail end of the clamping assembly is inserted into the bottom of the servo motor, the tail end of the clamping assembly is closed along with upward movement of the pull rod assembly, and clamping of the servo motor is achieved. At the moment, the limiting assembly is matched with the pull rod assembly, the clamping assembly is fixed in the current state, and self-locking of the servo motor is achieved. A manual clamping mode is replaced by an automatic mode, the coherence of the assembling process is guaranteed, the labor intensity of workers is relieved, and meanwhile potential safety hazards existing in forced assembling are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automated production equipment and relates to a clamping self-locking device. Background Art

[0002] With the continuous development of automation, robots are being used more and more widely. In order to achieve movement in all directions, robots have multiple servo motors. When assembling servo motors, some servo motors need to be assembled horizontally. The current assembly method is to manually hold the servo motor horizontally to assemble the servo motor on the robot.

[0003] However, servo motors are generally heavy, and when they are assembled with robots, high precision is required, and installation and alignment take a certain amount of time. Therefore, when manually assembling servo motors, there are technical problems such as high labor intensity and poor assembly quality, and there are also certain safety hazards. Summary of the invention

[0004] In view of this, the present invention provides a clamping self-locking device, which solves the technical problems of high labor intensity and unguaranteed assembly quality in the traditional servo motor assembly method.

[0005] In order to solve the above-mentioned problem, according to one aspect of the present application, an embodiment of the present invention provides a clamping self-locking device, which includes a frame assembly, a pull rod assembly, a clamping assembly and a limit assembly. The pull rod assembly is arranged on the frame assembly, and the end of the pull rod assembly is connected to the clamping assembly, and the pull rod assembly can drive the clamping assembly to move up and down and open or close its end. The limit assembly is arranged on the frame assembly, and the limit assembly has a limit state that cooperates with the pull rod assembly to limit the movement of the pull rod assembly.

[0006] In some embodiments, the tie rod assembly includes a tie rod shaft, a cross beam and a connecting rod, one end of the tie rod shaft passes through the upper end of the frame assembly and is connected to the cross beam, and the end of the cross beam is rotatably connected to the connecting rod.

[0007] In some embodiments, two connecting rods are provided, and the two connecting rods are rotatably connected to two ends of the beam respectively.

[0008] In some embodiments, the clamping assembly includes a connecting rod hanging plate connected to the output end of the pull rod assembly, two connecting rod hanging plates are provided, and each of the connecting rod hanging plates has a clamping claw at the end, and the two clamping claws are arranged opposite to each other; the action of the pull rod assembly can cause the two clamping claws to open or close.

[0009] In some embodiments, each of the clamping jaws comprises at least two receiving rods, and there is a gap between adjacent receiving rods; and when the two clamping jaws are closed, the receiving rod of one of the clamping jaws can be inserted into the gap of the other clamping jaw.

[0010] In some embodiments, the frame assembly includes a first fixing frame, a second fixing frame extends from the bottom of the first fixing frame, the pull rod assembly is connected to the first fixing frame, and the clamping assembly is connected to the second fixing frame.

[0011] In some embodiments, the first fixing frame includes an upper fixing plate, a lower fixing plate, and a side plate arranged between the upper fixing plate and the lower fixing plate, the pull rod shaft passes through the upper fixing plate, and the crossbeam can move in the space surrounded by the fixing plate, the lower fixing plate and the side plates.

[0012] In some embodiments, the second fixing plate includes a first connecting rod and a second connecting rod, the first connecting rod is vertically arranged at the bottom of the lower fixing plate, and the second connecting rod is horizontally arranged at the bottom of the first connecting rod; both ends of the second connecting rod are movably connected to the clamping assembly.

[0013] In some embodiments, the limiting assembly includes a fixing seat, a fixing hole and a fixing piece, the fixing seat is arranged on the frame assembly, the fixing hole is opened on the side of the fixing seat, and the fixing piece is inserted into the fixing hole; a limiting hole is opened on the pull rod shaft; when the limiting assembly is in a limiting state, the end of the pull rod shaft can be inserted into the limiting hole.

[0014] In some embodiments, the limiting assembly also includes a spring and a pressure cap, the spring is sleeved on the fixing member and located in the fixing hole, one end of the pressure cap is sleeved on the fixing member and its outer side cooperates with the inner wall of the fixing hole, one end of the pressure cap is located outside the fixing hole, and the other end of the pressure cap abuts against the spring.

[0015] Compared with the prior art, the clamping self-locking device of the present invention has at least the following beneficial effects:

[0016] The clamping self-locking device provided by the present invention includes a frame assembly, a pull rod assembly, a clamping assembly and a limit assembly. The pull rod assembly is arranged on the frame assembly, the end of the pull rod assembly is connected to the clamping assembly, and the pull rod assembly can drive the clamping assembly to move up and down and open or close its end. The limit assembly is arranged on the frame assembly, and the limit assembly has a limit state that cooperates with the pull rod assembly to limit the movement of the pull rod assembly.

[0017] During specific use, first, the lower end of the clamping self-locking device is brought close to the servo motor, and then an external force is applied to the pull rod assembly, specifically, the pull rod assembly is pushed downward, thereby causing the clamping assembly to move downward and the end of the clamping assembly to open. When the opening angle is large enough, the servo motor can be embraced. At this time, the pull rod assembly is pulled upward, and the end of the clamping assembly can be inserted into the bottom of the servo motor. As the pull rod assembly continues to move upward, the end of the clamping assembly closes, thereby achieving the clamping of the servo motor. After the clamping assembly clamps the servo motor, the limit assembly cooperates with the pull rod assembly. At this time, the pull rod assembly cannot move and is fixed in the current state, thereby achieving the self-locking of the servo motor. In the lateral installation of the servo motor, the present invention replaces the manual clamping method of the transmission with an automated method, thereby ensuring the continuity of the assembly process, reducing the labor intensity of the workers, and avoiding the potential safety hazards of forced assembly.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0020] Figure 1 It is a structural schematic diagram of a clamping self-locking device provided by an embodiment of the present invention;

[0021] Figure 2 It is a front view of a clamping self-locking device provided by an embodiment of the present invention;

[0022] Figure 3 is another structural schematic diagram of a clamping self-locking device provided by an embodiment of the present invention;

[0023] Figure 4 is another structural schematic diagram of a clamping self-locking device provided by an embodiment of the present invention;

[0024] Figure 5 is a top view of a clamping self-locking device provided by an embodiment of the present invention;

[0025] Figure 6 yes Figure 5 Cross-sectional view along AA direction;

[0026] Figure 7 yes Figure 6A partial enlarged view of point B in the middle;

[0027] Figure 8 is another front view of a clamping self-locking device provided by an embodiment of the present invention;

[0028] Fig. 9 is a side view of a clamping self-locking device provided by an embodiment of the present invention;

[0029] Fig.10 is another front view of a clamping self-locking device provided by an embodiment of the present invention;

[0030] Fig.11 It is another side view of a clamping self-locking device provided by an embodiment of the present invention.

[0031] in:

[0032] 1. Frame assembly; 11. First fixed frame; 12. Second fixed frame; 111. Upper fixed plate; 112. Lower fixed plate; 113. Side plate; 121. First connecting rod; 122. Second connecting rod; 2. Pull rod assembly; 21. Pull rod shaft; 22. Crossbeam; 23. Connecting rod; 3. Clamping assembly; 31. Connecting rod lifting plate; 32. Clamping claw; 321. Supporting rod; 322. Gap; 323. Folding edge; 4. Limiting assembly; 41. Fixed seat; 42. Fixed hole; 43. Fixing piece; 44. Spring; 45. Pressure cap; 5. Servo motor. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0034] In the description of the present invention, it should be clarified that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, but are not necessarily used to describe a specific order or sequence; the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, and do not mean that the referred device or element must have a specific direction or position, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] With the continuous development of automation, robots are being used more and more widely. For example, a six-axis robot has multiple servo motors and axes inside. The six-axis robot generally includes a base, a swivel seat, a large arm, a motor seat and a small arm connected in sequence, wherein at least the servo motors at the swivel seat and the large arm need to be assembled horizontally. However, the servo motor generally has a large weight, and when it is assembled with the robot, the precision requirements are high, and the installation and alignment require a certain amount of time. Therefore, the traditional manual assembly of the servo motor has technical problems such as high labor intensity and poor assembly quality, and there are also certain safety hazards.

[0037] To this end, the embodiment of the present invention provides a clamping self-locking device, which is mainly used for servo motors that are assembled horizontally. Compared with the traditional manual assembly, the clamping self-locking device provided by the embodiment of the present invention ensures the continuity of the assembly process, reduces the labor intensity of workers, and avoids the safety hazards of forced assembly.

[0038] This embodiment provides a clamping self-locking device, such as Figure 1-Figure 11 As shown, the clamping self-locking device includes a frame assembly 1, a pull rod assembly 2, a clamping assembly 3 and a limit assembly 4. The pull rod assembly 2 is arranged on the frame assembly 1, the end of the pull rod assembly 2 is connected to the clamping assembly 3, and the pull rod assembly 2 can drive the clamping assembly 3 to move up and down and open or close its end. The limit assembly 4 is arranged on the frame assembly 1, and the limit assembly 4 has a limit state that cooperates with the pull rod assembly 2 to limit the movement of the pull rod assembly 2.

[0039] Specifically, the frame assembly 1 is mainly used to provide support and fulcrum for the pull rod assembly 2, the clamping assembly 3 and the limit assembly 4. The pull rod assembly 2 is mainly used to apply external force to and fix the clamping self-locking device. One end of the pull rod assembly 2 extends out of the upper end of the frame assembly 1, and the other end of the pull rod assembly 2 extends out of the lower end of the frame assembly 1. The clamping assembly 3 is mainly used to clamp the servo motor 5. The input end of the clamping assembly 3 is connected to the output end of the pull rod assembly 2. The pull rod assembly 2 can transfer the received external force to the clamping assembly 3. The other end of the clamping assembly 3 is used to clamp the servo motor 5. After the clamping assembly 3 clamps the servo motor 5, the limit assembly 4 is used to ensure that this state continues, so as to provide more time for the installation of the servo motor.

[0040] In addition, it should be noted that the clamping self-locking device provided in this embodiment is not only capable of clamping a horizontal servo motor, but can also clamp other structures.

[0041] When clamping the servo motor 5 in an automated manner, two aspects need to be considered. One is how to achieve clamping, that is, how to transmit external force to the servo motor 5 and clamp it; the other is how to achieve self-locking, that is, how to ensure that the clamping state is maintained so that there is sufficient time for the subsequent installation and positioning of the servo motor 5.

[0042] With respect to the first aspect mentioned above, the present embodiment realizes the transmission of external force through the pull rod assembly 2, and the pull rod assembly 2 can drive the clamping assembly 3 to move up and down and open or close its end, that is, the pull rod assembly 2 can convert the external vertical force into forces in other directions; with respect to the second aspect mentioned above, the present embodiment adds a limit assembly 4, and the limit assembly 4 has a limit state that cooperates with the pull rod assembly 2 to limit the movement of the pull rod assembly 2, that is, when the clamping assembly 3 clamps the servo motor 5, the limit assembly 4 can cooperate with the pull rod assembly 2, and at this time the pull rod assembly 2 cannot move and is fixed in the current state, thereby fixing the clamping assembly 3 in the current state, thereby maintaining the clamping state.

[0043] In the specific use process, first, the lower end of the clamping self-locking device is brought close to the servo motor, and then an external force acts on the pull rod assembly 2, specifically pushing the pull rod assembly 2 downward, so that the pull rod assembly 2 moves downward, thereby causing the clamping assembly 3 to move downward and the end of the clamping assembly 3 to open. Figure 4 , Figure 8 as well as Fig.10As shown in the figure, when the opening angle is large enough, the servo motor 5 can be embraced. At this time, the pull rod assembly 2 is pulled upward, and the end of the clamping assembly 3 can be inserted into the bottom of the servo motor 5. As the pull rod assembly 2 continues to move upward, the end of the clamping assembly 3 is closed, and the servo motor 5 is clamped. After the clamping assembly 3 clamps the servo motor 5, the limit assembly 4 cooperates with the pull rod assembly 2. At this time, the pull rod assembly 2 cannot move and is fixed in the current state, as shown in the figure. Figure 1-Figure 3 As shown, self-locking of the servo motor 5 is achieved.

[0044] In the lateral installation of the servo motor, this embodiment replaces the manual clamping method of the transmission with an automated method, thereby ensuring the continuity of the assembly process, reducing the labor intensity of the workers, and avoiding the safety hazards of forced assembly.

[0045] In a specific embodiment, Figure 2 and Figure 3 As shown, the tie rod assembly 2 includes a tie rod shaft 21, a cross beam 22 and a connecting rod 23. One end of the tie rod shaft 21 passes through the upper end of the frame assembly 1 and is connected to the cross beam 22. The end of the cross beam 22 is rotatably connected to the connecting rod 23.

[0046] Specifically, the general outline of the tie rod shaft 21 is a columnar structure, which is arranged vertically, and the bottom of the tie rod shaft 21 is connected to a crossbeam 22. Of course, the tie rod shaft 21 and the crossbeam 22 can be formed in one piece or can be arranged independently. The crossbeam 22 is arranged horizontally, and its general outline is a rectangular parallelepiped structure. On one side of the crossbeam 22, assuming that the side has a first section, a second section, and a third section arranged in sequence, there are mounting ends on the first section and the third section, and the mounting ends have a rotating shaft. Corresponding to the rotating shaft, the end of the connecting rod 23 has a hole, and after the hole matches the rotating shaft, the connecting rod 23 can rotate relative to the crossbeam 22. Therefore, after the tie rod shaft 21 transmits the vertical external force to the crossbeam 22, the crossbeam 22 converts the vertical force into a rotational force through the cooperation of the hole and the rotating shaft, thereby controlling the ends of the two connecting rods 23 to move closer to each other or away from each other.

[0047] In this way, after adopting the above structure, the clamping self-locking device provided in this embodiment is connected to the power-assisted intelligent balancing crane through the pull rod shaft 21. The employee pulls the frame assembly 1 with one hand and applies external force to the crossbeam 22. In the process of force transmission, the direction of the force is changed through the connecting rod 23, so that the clamping assembly 3 can realize the clamping function, that is, the pull rod assembly 2 can drive the clamping assembly 3 to move up and down and open or close its end.

[0048] In a specific embodiment, two connecting rods 23 are provided, and the two connecting rods 23 are rotatably connected to two ends of the crossbeam 22 respectively.

[0049] For better explanation, it is assumed that the two connecting rods 23 are respectively the first connecting rod and the second connecting rod, one end of the first connecting rod has a first hole, and one end of the second connecting rod has a second hole, then the rotating shaft on the first section of the crossbeam 22 cooperates with the first hole on the first connecting rod, and the rotating shaft on the third section of the crossbeam 22 cooperates with the second hole on the second connecting rod. When the crossbeam 22 is pressed down, the distance between the other end of the first connecting rod and the other end of the second connecting rod becomes smaller, and at this time the end of the clamping assembly 3 is opened, and when the crossbeam 22 is pulled up, the distance between the other end of the first connecting rod and the other end of the second connecting rod becomes larger, and when the distance is the largest, the end of the clamping assembly 3 is closed.

[0050] In a specific embodiment, the clamping assembly 3 includes a connecting rod hanging plate 31 connected to the output end of the pull rod assembly 2, two connecting rod hanging plates 31 are provided, and each end of the connecting rod hanging plate 31 has a clamping claw 32, and the two clamping claws 32 are arranged opposite to each other; the movement of the pull rod assembly 2 can cause the two clamping claws 32 to open or close.

[0051] Specifically, for better explanation, it is assumed that the two connecting rod hanging plates 31 are respectively the first connecting rod hanging plate and the second connecting rod hanging plate, and the ends of the first connecting rod hanging plate and the second connecting rod hanging plate are respectively provided with a rotating shaft, and corresponding to the rotating shaft, the other end of the first connecting rod and the other end of the second connecting rod are respectively provided with a hole, and the rotating shaft and the hole are matched to realize force transmission.

[0052] In this way, after adopting the above structure, when the cross beam 22 is pressed down, the distance between the other end of the first connecting rod and the other end of the second connecting rod becomes smaller, at this time the distance between the end of the first connecting rod hanging plate and the end of the second connecting rod hanging plate becomes larger, and the end of the clamping assembly 3 is opened; when the cross beam 22 is pulled up, the distance between the other end of the first connecting rod and the other end of the second connecting rod becomes larger, the distance between the end of the first connecting rod hanging plate and the end of the second connecting rod hanging plate becomes smaller, and when the distance is the smallest, the end of the clamping assembly 3 is closed. Figure 2 and Figure 3 shown.

[0053] In a specific embodiment, Figure 4 As shown, each of the clamping jaws 32 includes at least two receiving rods 321, and there is a gap between adjacent receiving rods 321; and when the two clamping jaws 32 are closed, the receiving rod 321 of one of the clamping jaws 32 can be inserted into the gap 322 of the other clamping jaw 32.

[0054] Specifically, the clamping jaw 32 and the corresponding connecting rod hanging plate 31 are integrally formed. Each of the clamping jaws 32 includes at least two receiving rods 321. Assuming that the two clamping jaws 32 are respectively the first clamping jaw and the second clamping jaw, in one embodiment: the first clamping jaw includes a first main rod, and two receiving rods 321 extend from the side of the first main rod close to the second clamping jaw, and a first gap is formed between the two receiving rods 321; the second clamping jaw includes a second main rod, and three receiving rods 321 extend from the side of the second main rod close to the first clamping jaw, and two gaps are formed between the three receiving rods 321, which are the second gap and the third gap. When the end of the clamping assembly 3 is closed, one of the receiving rods of the first clamping jaw is inserted into the second gap, the other receiving rod is inserted into the third gap, and the receiving rod 321 in the middle of the second clamping jaw is inserted into the first gap. This matching method ensures the stability of the clamping and prevents the servo motor 5 from falling off.

[0055] In addition, in order to better fix the servo motor 5, when the first clamp and the second clamp are matched, the receiving rods 321 on both sides have upward folded edges 323. In the above embodiment, that is, the receiving rods 321 on both sides of the second clamp have folded edges 323, and the servo motor 5 can be just clamped between the two folded edges 323.

[0056] In a specific embodiment, Figure 3 As shown, the frame assembly 1 includes a first fixing frame 11 , a second fixing frame 12 extends from the bottom of the first fixing frame 11 , the pull rod assembly 2 is connected to the first fixing frame 11 , and the clamping assembly 3 is connected to the second fixing frame 12 .

[0057] Specifically, Figure 2 and Figure 3 As shown, the first fixing frame 11 includes an upper fixing plate 111, a lower fixing plate 112, and a side plate 113 disposed between the upper fixing plate 111 and the lower fixing plate 112, the pull rod shaft 21 passes through the upper fixing plate 111, and the cross beam 22 can move in a space surrounded by the upper fixing plate 111, the lower fixing plate 112, and the side plate 113. Of course, the upper fixing plate 111, the lower fixing plate 112, and the side plate 113 can be integrally formed or independently disposed.

[0058] During the downward movement of the pull rod shaft 21, when the cross beam 22 moves to the lower fixed plate 112, it can no longer move downward, and the clamping assembly 3 is now fully opened; during the upward movement of the pull rod shaft 21, when the cross beam 22 moves to fit with the lower surface of the upper fixed plate 111, it can no longer move upward, and the clamping assembly 3 is now in a closed state.

[0059] Specifically, Figure 2 and Figure 3As shown, the second fixing frame 12 includes a first connecting rod 121 and a second connecting rod 122, wherein the first connecting rod 121 is vertically arranged at the bottom of the lower fixing plate 112, and the second connecting rod 122 is horizontally arranged at the bottom of the first connecting rod 121; both ends of the second connecting rod 122 are movably connected to the clamping assembly 3. Both ends of the second connecting rod 122 have rotating shafts, and corresponding to the rotating shafts, both connecting rod hanging plates 31 have shaft holes, and the shaft holes and the rotating shafts cooperate to achieve relative fixation of the clamping assembly 3.

[0060] In a specific embodiment, Figure 6 and Figure 7 As shown, the limiting assembly 4 includes a fixing seat 41, a fixing hole 42 and a fixing member 43, the fixing seat 41 is arranged on the frame assembly 1, the fixing hole 42 is opened on the side of the fixing seat 41, and the fixing member 43 is inserted into the fixing hole 42; a limiting hole is opened on the pull rod shaft 21; when the limiting assembly 4 is in a limiting state, the end of the pull rod shaft 21 can be inserted into the limiting hole.

[0061] Specifically, the fixing seat 41 is fixed to the upper fixing plate 111 by screws, and the fixing seat 41 has a center hole. The pull rod shaft 21 passes through the center hole of the fixing seat 41 and the upper fixing plate 111 in sequence, and is connected to the crossbeam 22 located in the space surrounded by the upper fixing plate 111, the lower fixing plate 112 and the side plate 113. The general outline of the fixing seat 41 is a columnar structure with a certain thickness, and a fixing hole 42 is radially arranged on the outer peripheral surface of the columnar structure, and the fixing hole 42 extends to the center hole, and a fixing member 43 is provided in the fixing hole 42; in this embodiment, the fixing hole 42 is a pin hole, and the fixing member 43 is a pin rod.

[0062] In this way, by adopting the above structure, when the pull rod shaft 21 needs to move up and down, the pin rod is pulled so that the end of the pin rod is not in contact with the limiting hole, and the pull rod shaft 21 can move up and down at this time; conversely, when the pull rod shaft 21 needs to be limited, the pin rod is pushed so that the end of the pin rod is inserted into the limiting hole, and the pull rod shaft 21 is locked at this time, and then the clamping assembly 3 is locked, realizing the self-locking function.

[0063] In a specific embodiment, Figure 7 As shown, the limit assembly 4 further includes a spring 44 and a pressure cap 45, wherein the spring 44 is sleeved on the fixing member 43 and located in the fixing hole 42, one end of the pressure cap 45 is sleeved on the fixing member 43 and its outer side is matched with the inner wall of the fixing hole 42, one end of the pressure cap 45 is located outside the fixing hole 42, and the other end of the pressure cap 45 abuts against the spring 44. The pressure cap 45 is a pin cap.

[0064] The method for using the clamping self-locking device provided in this embodiment is as follows:

[0065] First, bring the clamping self-locking device close to the servo motor 5 on the workbench, and operate the crossbeam 22 to make the width of the opening between the first connecting rod lifting plate and the second connecting rod lifting plate larger than the width of the servo motor 5. Then pull the frame assembly 1 to make the positions of the first connecting rod lifting plate and the second connecting rod lifting plate lower than the lower plane of the servo motor 5. Then push the crossbeam 22 upward, the first connecting rod lifting plate and the second connecting rod lifting plate are closed, and the bottom surface holds the servo motor 5 horizontally. At this time, the pin hole runs to the pin rod, and the pin rod is inserted into the pin hole under the pressure of the spring 44; limit the pull rod shaft 21 to achieve a horizontal and stable state of the first connecting rod lifting plate and the second connecting rod lifting plate. Thereby keeping the servo motor 5 stable during hoisting.

[0066] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous technical features can be freely combined and superimposed.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A clamping self-locking device, characterized in that: The clamping self-locking device includes a frame assembly, a pull rod assembly, a clamping assembly and a limit assembly. The pull rod assembly is arranged on the frame assembly, the end of the pull rod assembly is connected to the clamping assembly, and the pull rod assembly can drive the clamping assembly to move up and down and open or close its end. The limit assembly is arranged on the frame assembly, and the limit assembly has a limit state that cooperates with the pull rod assembly to limit the movement of the pull rod assembly.

2. The clamping self-locking device according to claim 1, characterized in that: The pull rod assembly comprises a pull rod shaft, a cross beam and a connecting rod. One end of the pull rod shaft passes through the upper end of the frame assembly and is connected to the cross beam. The end of the cross beam is rotatably connected to the connecting rod.

3. The clamping self-locking device according to claim 2, characterized in that: Two connecting rods are provided, and the two connecting rods are rotatably connected to the two ends of the crossbeam respectively.

4. The clamping self-locking device according to claim 1, characterized in that: The clamping assembly includes a connecting rod hanging plate connected to the output end of the pull rod assembly, two connecting rod hanging plates are arranged, and each end of the connecting rod hanging plates has a clamping claw, and the two clamping claws are arranged opposite to each other; the action of the pull rod assembly can cause the two clamping claws to open or close.

5. The clamping self-locking device according to claim 4, characterized in that: Each of the clamping jaws comprises at least two receiving rods, and there is a gap between adjacent receiving rods; and when the two clamping jaws are closed, the receiving rod of one of the clamping jaws can be inserted into the gap of the other clamping jaw.

6. The clamping self-locking device according to claim 2, characterized in that: The frame assembly comprises a first fixing frame, a second fixing frame extends from the bottom of the first fixing frame, the pull rod assembly is connected to the first fixing frame, and the clamping assembly is connected to the second fixing frame.

7. The clamping self-locking device according to claim 6, characterized in that: The first fixing frame includes an upper fixing plate, a lower fixing plate and a side plate arranged between the upper fixing plate and the lower fixing plate, the pull rod shaft passes through the upper fixing plate, and the crossbeam can move in a space surrounded by the fixing plate, the lower fixing plate and the side plates.

8. The clamping self-locking device according to claim 6, characterized in that: The second fixing plate includes a first connecting rod and a second connecting rod, wherein the first connecting rod is vertically arranged at the bottom of the lower fixing plate, and the second connecting rod is horizontally arranged at the bottom of the first connecting rod; both ends of the second connecting rod are movably connected to the clamping assembly.

9. The clamping self-locking device according to claim 7, characterized in that: The limiting assembly includes a fixing seat, a fixing hole and a fixing piece. The fixing seat is arranged on the frame assembly, the fixing hole is opened on the side of the fixing seat, and the fixing piece is inserted into the fixing hole; a limiting hole is opened on the pull rod shaft; when the limiting assembly is in a limiting state, the end of the pull rod shaft can be inserted into the limiting hole.

10. The clamping self-locking device according to claim 9, characterized in that: The limiting assembly also includes a spring and a pressure cap. The spring is sleeved on the fixing member and located in the fixing hole. One end of the pressure cap is sleeved on the fixing member and its outer side cooperates with the inner wall of the fixing hole. One end of the pressure cap is located outside the fixing hole, and the other end of the pressure cap abuts against the spring.

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