Clamp

Abstract

The utility model discloses a clamp which comprises a bottom plate, a first side plate, a second side plate, a third side plate, at least one movable pressing plate and a driving mechanism. The second side plate is fixed to the bottom plate, and the second side plate and the first side plate are arranged at intervals in the first direction; the third side plate is arranged on the bottom plate in a sliding mode in the first direction and located between the first side plate and the second side plate. At least one movable pressing plate is arranged on the bottom plate in a sliding mode in the first direction, and all the movable pressing plates are located between the second side plate and the third side plate. The driving mechanism drives the third side plate to move in the direction close to the movable pressing plates in the first direction and drives the two adjacent movable pressing plates to move back to back, and the movable pressing plates and the second side plate and the movable pressing plates and the third side plate move back to back. Therefore, the clamp is simple in structure, and the driving mechanism is located between the first side plate and the second side plate, so that the occupied space of the battery formation clamp is smaller, the appearance of the battery formation clamp is more regular, and the clamp is convenient to place.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery manufacturing technical field, concretely relates to a clamp. BACKGROUND

[0002] With the progress of science and technology and the application of electronic equipment, lithium battery has been applied to various aspects of life. The production and manufacturing process of sheet lithium battery generally includes the following procedures: stirring, coating, cutting, winding (or laminating), liquid injection, formation, hot pressing, constant volume, etc. Among them, formation is a very key procedure to improve the electrical performance of lithium battery. Formation is a process of activating the active material inside the battery by passing a proper low current through the electrodes of the initially formed battery. The procedure of battery formation is usually that workers arrange the batteries in a uniform manner in an equidistant clamp outside the device, and then put the whole clamp into the formation device to monitor the positive and negative electrodes of each battery by contacting the probes.

[0003] The prior art usually uses an injection tray as an equidistant clamp, but this type of equidistant clamp needs to be opened, and it is easy to deform, and when the model is changed, it must be re-opened, and the unit price is expensive due to too small quantity, which is not suitable for experimental production lines. The current experimental production line formation clamp is mostly assembled by processing parts, and the shear type structure is used to realize the linkage of the pressing plates, and the T-shaped screw rod and nut transmission is used to realize the movement of the pressing plates by hand-rotating input power. It improves the labor cost and the structure is complex. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide a clamp which can solve the problem of high labor cost.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A clamp comprises:

[0007] a bottom plate;

[0008] a first side plate fixed to the bottom plate;

[0009] a second side plate fixed to the bottom plate and arranged in a first direction with the first side plate;

[0010] a third side plate slidingly arranged on the bottom plate in the first direction and located between the first side plate and the second side plate;

[0011] at least one movable pressing plate slidingly arranged on the bottom plate in the first direction, and all the movable pressing plates are located between the second side plate and the third side plate;

[0012] The accommodation space is formed between two adjacent movable pressing plates, and / or between the movable pressing plate and the second side plate, and / or between the movable pressing plate and the third side plate, and is used for accommodating a battery.

[0013] The driving mechanism comprises a first driving assembly and a second driving assembly, the first driving assembly is connected to the third side plate and drives the third side plate to move in a first direction towards the movable pressing plate, and the second driving assembly is arranged on both sides of each movable pressing plate in the first direction, the side of the third side plate facing the movable pressing plate, and the side of the second side plate facing the movable pressing plate, to drive the two adjacent movable pressing plates, the movable pressing plate and the second side plate, and the movable pressing plate and the third side plate to move away from each other.

[0014] Optionally, in the clamp, the first driving assembly comprises a cylinder and a gas pressure adjusting channel connected to the cylinder.

[0015] Optionally, in the clamp, the cylinder is fixed to the third side plate, and the gas pressure adjusting channel is arranged on the third side plate; the piston rod of the cylinder is connected to the first side plate after penetrating through the third side plate.

[0016] Alternatively, the cylinder is fixed to the first side plate, and the gas pressure adjusting channel is arranged on the first side plate; the piston rod of the cylinder is connected to the third side plate.

[0017] Optionally, in the clamp, the first driving assembly further comprises an air charging device for charging the cylinder through the gas pressure adjusting channel.

[0018] Optionally, in the clamp, the second driving assembly is a magnet.

[0019] The driving force of the first driving assembly is greater than the repulsive force between two adjacent magnets.

[0020] Optionally, in the clamp, the side of the second side plate facing the movable pressing plate is provided with a backing plate.

[0021] And / or, the side of the third side plate facing the movable pressing plate is provided with the backing plate.

[0022] And / or, the two sides of the movable pressing plate in the first direction are respectively provided with the backing plate.

[0023] Optionally, in the clamp, the backing plate is provided with a pad, and in a second direction, the accommodation space is formed between two adjacent backing plates and the pads connected thereto.

[0024] The included angle between the second direction and the first direction is greater than 0° and less than 180°.

[0025] Optionally, in the clamp, a guide rod is further included, an axial direction of the guide rod is parallel to the first direction, two ends of the guide rod are connected to the first side plate and the second side plate respectively, and the guide rod passes through the third side plate and the movable pressing plate; the first side plate, the second side plate and the third side plate are parallel to each other.

[0026] Optionally, in the clamp, the third side plate and the movable pressing plate are each provided with a through hole, a linear bearing is arranged in the through hole, and the guide rod passes through the linear bearing.

[0027] Optionally, in the clamp, a rolling member is arranged on a side surface of the third side plate and the movable pressing plate facing the bottom plate.

[0028] From the above technical solution, it can be seen that the first driving assembly is arranged to drive the third side plate to move, the movement of the third side plate can drive the movement of the movable pressing plate, so as to adjust the distance of the accommodation space, automatically compress the battery in the accommodation space, and through the arrangement of the second driving assembly, the adjacent two movable pressing plates, the movable pressing plate and the second side plate, and the movable pressing plate and the third side plate are driven to move away from each other, so as to realize the automatic separation and expansion between the two, reduce the labor cost and have higher operation precision. In addition, the structure is simple, the driving mechanism is located between the first side plate and the second side plate, so that the space occupied by the battery formation clamp is smaller, and the appearance of the battery formation clamp is more regular, so that the clamp is placed conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Fig. 1 The structure schematic view of the battery formation clamp provided by the embodiment of the present application is shown in the figure.

[0031] Fig. 2 The structure schematic view of the main body frame provided by the embodiment of the present application is shown in the figure.

[0032] Fig. 3 The structure schematic view of the movable pressing plate provided by the embodiment of the present application is shown in the figure.

[0033] Among them:

[0034] 1, bottom plate; 2, first side plate; 3, second side plate;

[0035] 4, third side plate; 41, linear bearing; 42, rolling member;

[0036] 5, movable pressing plate;

[0037] 61, cylinder; 62, piston rod; 63, inflation device;

[0038] 71, second driving assembly; 72, pad plate; 73, pad block; 8, guide rod; 9, battery. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0040] In the description of the utility model, it should be pointed out that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0041] As Figs. 1-3 shown, the utility model embodiment provides a clamp, can solve the problem of high labor cost.

[0042] Firstly, the clamp comprises a bottom plate 1, a first side plate 2, a second side plate 3, a third side plate 4, at least one movable pressing plate 5 and a driving mechanism, wherein the first side plate 2 is fixed to the bottom plate 1; the second side plate 3 is fixed to the bottom plate 1 and is arranged in a first direction away from the first side plate 2; the third side plate 4 is slidably arranged on the bottom plate 1 along the first direction and is located between the first side plate 2 and the second side plate 3; the at least one movable pressing plate 5 is slidably arranged on the bottom plate 1 along the first direction, and all the movable pressing plates 5 are located between the second side plate 3 and the third side plate 4; wherein, between any two adjacent movable pressing plates 5; and / or, between the movable pressing plate 5 and the second side plate 3; and / or, between the movable pressing plate 5 and the third side plate 4, a containing space is formed, and the containing space is used for containing a battery 9. Wherein, the first direction is shown in detail in Fig. 1 The driving mechanism comprises a first driving assembly connected to the third side plate 4 and driving the third side plate 4 to move along the first direction towards the movable pressing plate 5, and a second driving assembly 71 arranged on both sides of each movable pressing plate 5 along the first direction, the side of the third side plate 4 facing the movable pressing plate 5, and the side of the second side plate 3 facing the movable pressing plate 5, to drive the adjacent two movable pressing plates 5, the movable pressing plate 5 and the second side plate 3, and the movable pressing plate 5 and the third side plate 4 to move away from each other. It should be noted that the clamp can be used in the field of battery 9 manufacturing, but is not limited thereto, and can also be applied to other fields. When used in the field of battery 9, the battery 9 in the containing space is automatically clamped by the plate bodies on both sides, and can continuously maintain the pressure, thereby avoiding the occurrence of battery 9 rebounding and swelling. The process of clamping the battery 9 does not require manual adjustment of the pressing plate movement through the hand screw nut transmission, which can reduce the labor cost. The clamp can realize automatic equal-distance separation between the automatic pressing plate and the pressing plate, and can realize the pressing and pressure maintaining of the battery 9. In addition, a first weight-reducing hole (i.e. a hole is provided in the bottom plate 1 to reduce the weight without affecting the overall strength and function of the bottom plate 1) is provided in the bottom plate 1, which can be a blind hole or a through hole, and its shape can be circular, oval, square or other geometric shapes. In general, the specific shape, number and position of the first weight-reducing hole can be designed according to actual needs by those skilled in the art.

[0043] As can be seen, this embodiment of the invention, through the setting of the first driving component, can drive the third side plate 4 to move. The movement of the third side plate 4 can push the movement of the movable pressure plate 5, thereby adjusting the spacing of the accommodating space and automatically pressing the battery 9 in the accommodating space. Furthermore, through the setting of the second driving component 71, it can drive the two adjacent movable pressure plates 5, the movable pressure plate 5 and the second side plate 3, and the movable pressure plate 5 and the third side plate 4 to move back to back, realizing the automatic separation and pop-out between adjacent two without manual operation, reducing labor costs and improving operational accuracy. In addition, the structure is simple, and the driving mechanism is located between the first side plate 2 and the second side plate 3, which can make the battery formation fixture occupy less space and make the appearance of the battery formation fixture more regular, facilitating the placement of the fixture.

[0044] In specific implementation, the first drive assembly includes a cylinder 61 and a pressure regulating channel connected to the cylinder 61. The pressure regulating channel includes pipes for controlling the pressure of the cylinder 61 and related devices, including, but not limited to, a pressure-holding inflation nozzle. The pressure-holding inflation nozzle is an inflation interface with sealing and pressure-maintaining functions, primarily providing a reliable inflation channel and automatically or manually closing after inflation to prevent gas leakage. The pressure regulating channel is used to adjust the intake and exhaust pressures of the cylinder 61, thereby achieving precise control over the speed, force, and position of the cylinder 61.

[0045] In specific implementation, cylinder 61 is fixed to the third side plate 4, and the air pressure regulating channel is located on the third side plate 4; the piston rod 62 of cylinder 61 passes through the third side plate 4 and connects to the first side plate 2; or, cylinder 61 is fixed to the first side plate 2, and the air pressure regulating channel is located on the first side plate 2; the piston rod 62 of cylinder 61 is connected to the third side plate 4. This achieves the fixation of cylinder 61, while ensuring that cylinder 61 and piston rod 62 are both located between the first side plate 2 and the second side plate 3, that is, cylinder 61 and piston rod 62 do not protrude from the two side plates (first side plate 2 and second side plate 3) of the fixture, making the overall fixture more neat and aesthetically pleasing, and with a smaller overall size. It should be noted that, since cylinder 61 is located inside the fixture, the movable pressure plate 5 is provided with a clearance hole for avoiding cylinder 61.

[0046] In specific implementation, the first drive assembly also includes an inflation device 63, which is used to inflate the cylinder 61 by connecting to the air pressure regulating channel. The inflation device 63 guides compressed gas from an external air source into the cylinder 61, while ensuring that the air pressure and flow rate meet the requirements. It should be noted that the inflation device 63 includes, but is not limited to, an inflation gun. The inflation gun is connected to external compressed air, and air is injected into the cylinder 61 by aligning it with the air pressure regulating channel (pressure-holding inflation nozzle), which causes the movable pressure plate 5 and the third side plate 4 assembly to slide (the cylinder 61 can be returned to its original position simply by pressing the pressure-holding inflation nozzle to release the air). The cylinder 61 can achieve the pushing action without the need for an external air pipe through the pressure-holding inflation nozzle and the inflation gun, which is simple in structure and easy to operate.

[0047] In specific implementation, the second driving component 71 is a magnet, which achieves the automatic separation and spring-off function between adjacent plates through the repulsion principle of like poles of the magnets; the driving force of the first driving component is greater than the repulsive force between two adjacent magnets to ensure that the adjacent plates can approach each other and press the battery 9 disposed on the adjacent plates. If the driving force of the first driving component is not greater than the repulsive force between two adjacent magnets, the adjacent plates will move away from each other, and the battery 9 cannot be pressed, thus failing to complete the formation of the battery 9. It should be noted that the magnet includes, but is not limited to, magnetic magnets.

[0048] The cylinder 61 is likened to an air bag. The cylinder 61 is connected to the pressure-holding inflation nozzle of the air pressure regulating channel. External compressed air is injected into the cylinder 61 through the inflation gun, causing the cylinder 61 push rod to exert a force between the third side plate 4 and the movable pressure plate 5, thereby generating a clamping force. This achieves the clamping and pressure-holding between the pressure plates (the thrust of the cylinder 61 is greater than the thrust of all the magnets. Pressing the pressure-holding inflation nozzle releases the air, and the repulsive force between the magnets will cause the pressure plates to separate and spring apart one by one at equal distances).

[0049] In specific implementation, a pad 72 is provided on the side of the second side plate 3 facing the movable pressure plate 5, and the second side plate 3 forms an accommodating space for accommodating the battery 9 between itself and the adjacent movable pressure plate 5. A pad 72 is provided on the contact surface of the movable pressure plate 5 that is in direct contact with the battery 9 and on the contact surface of the second side plate 3; and / or, a pad 72 is provided on the side of the third side plate 4 facing the movable pressure plate 5, and an accommodating space for accommodating the battery 9 is formed between the third side plate 4 and the adjacent movable pressure plate 5. A pad 72 is provided on the contact surface of the movable pressure plate 5 that is in direct contact with the battery 9 and on the contact surface of the third side plate 4; and / or, pads 72 are provided on both sides of the movable pressure plate 5 along the first direction, and an accommodating space for accommodating the battery 9 is formed between two adjacent movable pressure plates 5. A pad 72 is provided on the contact surface of the movable pressure plate 5 that is in direct contact with the battery 9. The pad 72 can evenly distribute the force it receives onto the plate, preventing excessive localized stress that could lead to deformation or damage. Furthermore, the pad 72 prevents direct contact between the plate and the battery 9, reducing friction and wear. In addition, the pad 72, including but not limited to PP pads 72, provides cushioning for the contact between the plate and the battery 9, reducing impact and preventing the plate from damaging the battery 9. Moreover, the connection methods for the pad 72 include, but are not limited to, bolt fixing, adhesive bonding, or snap-fit ​​connections.

[0050] In a specific implementation, a pad 73 is provided on the pad 72. Along the second direction, a accommodating space is formed between two adjacent pads 72 and the pad 73 connected to them; wherein the angle between the second direction and the first direction is greater than 0° and less than 180°. It should be noted that the second direction is the height direction of the battery 9. Furthermore, the pad 73 has a second weight-reducing hole along its thickness direction (i.e., a hole is made in the pad 73 to reduce weight without affecting the overall strength and function of the pad 73). The second weight-reducing hole can be a blind hole or a through hole, and its shape can be circular, elliptical, square, or other geometric shapes. In general, the specific shape, number, and location of the second weight-reducing hole can be specifically designed by those skilled in the art according to actual needs. Furthermore, the pad 73 has protrusions at both ends along the third direction to limit the battery 9 in the third direction. The battery 9 is limited in the first direction by the plates on both sides of its large surface, in the second direction by the pad 73 itself, and in the third direction by the protrusions on the pad 73. This achieves the limitation of the three-dimensional position of the battery 9, fixing it within the accommodating space and facilitating the formation process. The number of pads 73 along the third direction is determined according to the number of batteries 9; see details below. Fig. 3There are two pads 73, but it is not limited to this. The specific number of pads 73 can be designed by those skilled in the art according to actual needs. The third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction, i.e., the height direction. It should also be noted that the pads 73 can be provided on each pad 72, so that there are two pads 73 below the formed accommodating space, that is, the sum of the dimensions of the two pads 73 along the first direction is equal to the thickness of the battery 9; the pads 73 can also be provided on one pad 72 used to form an accommodating space, and the other pad 72 is not provided with pads 73, so that there is one pad 73 below the formed accommodating space, that is, the sum of the dimensions of the pad 73 along the first direction is equal to the thickness of the battery 9.

[0051] In specific implementation, it also includes guide rods 8. The axis of guide rods 8 is parallel to the first direction. The two ends of guide rods 8 are connected to the first side plate 2 and the second side plate 3 respectively, and pass through the third side plate 4 and the movable pressure plate 5. The first side plate 2, the second side plate 3, and the third side plate 4 are parallel to each other, so that the side plates can evenly distribute the load and avoid excessive local stress. It can provide precise guidance for the third side plate 4 and the movable pressure plate 5 moving between the first side plate 2 and the second side plate 3, and can limit the position of the battery 9 and ensure its stability. The guide rods 8 are mainly used to guide, support, and constrain the movement trajectory of the third side plate 4 and the movable pressure plate 5, ensuring that they move along the first direction. Four guide rods 8 are provided, and the four guide rods 8 are located at the four corners of the first side plate 2, as detailed in [link to details]. Fig. 1 However, this is not the only possibility. The specific number and location of the guide rods 8 can be designed by those skilled in the art according to actual needs.

[0052] In a specific implementation, both the third side plate 4 and the movable pressure plate 5 are provided with through holes, and a linear bearing 41 is provided in the through hole, through which the guide rod 8 is installed. However, it is not limited to this; a slider can also be provided in the through hole to reduce friction and improve motion efficiency when the movable pressure plate 5 and the third side plate 4 move relative to the guide rod 8. The components provided in the through hole that cooperate with the guide rod 8 can be specifically designed by those skilled in the art according to actual needs.

[0053] In specific implementation, a rolling member 42 is provided on the side of the third side plate 4 and the movable pressure plate 5 facing the base plate 1. The rolling member 42 achieves the transmission of gravity and the relative movement of the third side plate 4 and the movable pressure plate 5 with the base plate 1 through rolling contact with the base plate 1. It should be noted that the rolling member 42 can be a roller (see details). Figs. 1-3It can be a ball bearing, but is not limited to this. The specific structural form of the rolling member 42 can be designed by those skilled in the art according to actual needs. In addition, the rolling members 42 are respectively disposed at both ends of the third side plate 4 and the movable pressure plate 5 along the third direction, but are not limited to this. The specific number and specific position of the rolling members 42 can be designed by those skilled in the art according to actual needs.

[0054] In specific implementation, the bottom of the third side plate 4 is provided with a first groove, which is a through groove along the first direction, and the bottom of the movable pressure plate 5 is provided with a second groove, which is also a through groove along the first direction. The top of the base plate 1 is provided with a long strip-shaped protrusion parallel to the first direction. The cross-sectional shape of the protrusion is adapted to the first and second grooves, and the number of protrusions corresponds to the number of the first and second grooves. The third side plate 4 and the movable pressure plate 5 can slide relative to the protrusion. The protrusion is located in the first and second grooves, which facilitates the positioning of the third side plate 4 and the movable pressure plate 5 with the base plate 1, and also facilitates the limitation during movement. However, it is not limited to this. The third side plate 4 and the movable pressure plate 5 can also be provided with protrusions, and the corresponding base plate 1 can be provided with a long strip-shaped groove. Since the third side plate 4 and the movable pressure plate 5 are provided with a pad 72 and a pad block 73, the bottom of the pad 72 can be provided with a groove or protrusion of the same shape as the bottom of the third side plate 4 and the movable pressure plate 5, or it can avoid the location of the groove or protrusion and be flush with the bottom.

[0055] In practice, the operator places the battery 9 into the limiting space of the pad 73, then uses an air gun to inflate the pressure-holding nozzle, after which the cylinder 61 pushes out and acts on the pressure plate to create a clamping force on the battery 9. The operator then places the entire fixture into the formation equipment for testing. After the test is completed, the operator removes the fixture, presses the pressure-holding nozzle to release the air from the cylinder 61, and the pressure plate automatically springs open due to the magnetic repulsion principle, allowing the operator to easily remove and place the battery 9.

[0056] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0058] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamp, characterized in that, include: Base plate (1); The first side plate (2) is fixed to the bottom plate (1); The second side plate (3) is fixed to the bottom plate (1) and is spaced apart from the first side plate (2) in the first direction; The third side plate (4) is slidably disposed on the bottom plate (1) along the first direction and is located between the first side plate (2) and the second side plate (3); At least one movable pressure plate (5) is slidably disposed on the base plate (1) along the first direction, and all the movable pressure plates (5) are located between the second side plate (3) and the third side plate (4); Wherein, between two adjacent movable pressure plates (5); and / or, between the movable pressure plate (5) and the second side plate (3); and / or, between the movable pressure plate (5) and the third side plate (4), an accommodating space is formed, the accommodating space being used to accommodate the battery (9); The driving mechanism includes a first driving component and a second driving component (71). The first driving component is connected to the third side plate (4) and drives the third side plate (4) to move along a first direction toward the movable pressure plate (5). The second driving component (71) is disposed on both sides of each movable pressure plate (5) along the first direction, on the side of the third side plate (4) facing the movable pressure plate (5), and on the side of the second side plate (3) facing the movable pressure plate (5) to drive two adjacent movable pressure plates (5), the movable pressure plate (5) and the second side plate (3), and the movable pressure plate (5) and the third side plate (4) to move back to back.

2. The clamp according to claim 1, characterized in that, The first drive assembly includes a cylinder (61) and a pressure regulating channel connected to the cylinder (61).

3. The clamp according to claim 2, characterized in that, The cylinder (61) is fixed to the third side plate (4), and the air pressure regulating channel is provided on the third side plate (4); the piston rod (62) of the cylinder (61) passes through the third side plate (4) and is connected to the first side plate (2); Alternatively, the cylinder (61) is fixed to the first side plate (2), and the air pressure regulating channel is provided on the first side plate (2); the piston rod (62) of the cylinder (61) is connected to the third side plate (4).

4. The clamp according to claim 2, characterized in that, The first drive assembly also includes an inflation device (63), the The inflation device (63) is used to inflate the cylinder (61) by connecting the air pressure regulating channel.

5. The clamp according to any one of claims 1 to 4, characterized in that, The second driving component (71) is a magnet; The driving force of the first driving component is greater than the repulsive force between two adjacent magnets.

6. The clamp according to claim 1, characterized in that, The second side plate (3) is provided with a pad (72) on the side facing the movable pressure plate (5); And / or, the pad (72) is provided on the side of the third side plate (4) facing the movable pressure plate (5); And / or, the movable pressure plate (5) is provided with the pad (72) on two sides along the first direction.

7. The clamp according to claim 6, characterized in that, The pad (72) is provided with a pad (73), and along the second direction, the accommodating space is formed between two adjacent pads (72) and the pad (73) connected thereto; Wherein, the angle between the second direction and the first direction is greater than 0° and less than 180°.

8. The clamp according to claim 1, characterized in that, It also includes a guide rod (8), the axis of which is parallel to the first direction. The two ends of the guide rod (8) are respectively connected to the first side plate (2) and the second side plate (3), and pass through the third side plate (4) and the movable pressure plate (5); the first side plate (2), the second side plate (3) and the third side plate (4) are parallel to each other.

9. The clamp according to claim 8, characterized in that, Both the third side plate (4) and the movable pressure plate (5) are provided with through holes, and a linear bearing (41) is provided in the through holes. The guide rod (8) is arranged through the linear bearing (41).

10. The clamp according to claim 1, characterized in that, Rolling members (42) are provided on the sides of the third side plate (4) and the movable pressure plate (5) facing the bottom plate (1).

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