A clamp

Abstract

This invention discloses a clamping fixture, including a fixed frame, a first clamping assembly, a second clamping assembly, a third clamping assembly, and a base support assembly. Two first clamping assemblies are disposed on opposite sides of the fixed frame, and the two first clamping assemblies can move closer or further apart to clamp and release the workpiece. The second clamping assembly is located between the two first clamping assemblies and can move to the upper surface of the workpiece. The third clamping assembly is located outside the first clamping assemblies and can move to the bottom of the workpiece. The base support assembly can move to one end of the workpiece and lift that end. By clamping both sides of the workpiece with the first clamping assemblies, pressing down on the workpiece with the second clamping assembly, and lifting the workpiece from the bottom with the third clamping assembly and the base support assembly, clamping is achieved on all sides of the workpiece, solving the technical problems of low efficiency when manually handling workpieces and easy slippage when handling workpieces with ordinary clamps.

Description

Technical Field

[0001] This invention belongs to the field of material handling fixture technology and relates to a clamp. Background Technology

[0002] A condenser is a component in a refrigeration system and a type of heat exchanger. It converts gas or vapor into liquid and rapidly transfers heat from the tubes to the air near the tubes. It is a common and widely used heat exchanger.

[0003] Traditionally, condensers are moved manually, which is labor-intensive and inefficient. Another method is to use ordinary clamps, but condensers are generally irregularly shaped, and ordinary clamps can easily cause them to fall off when moving large, multi-layered condensers. Summary of the Invention

[0004] In view of this, the present invention provides a clamp that solves the technical problems of low efficiency when manually handling condensers and easy detachment when handling condensers with ordinary clamps.

[0005] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a clamp, the clamp including a fixed frame and a first clamping assembly, a second clamping assembly, a third clamping assembly, and a base support assembly disposed on the fixed frame; two first clamping assemblies are disposed and respectively located on both sides of the fixed frame, the two first clamping assemblies being able to move closer or further apart to clamp and release a workpiece; the second clamping assembly is located between the two first clamping assemblies and is movable to the upper surface of the workpiece; the third clamping assembly is located outside the first clamping assemblies and is movable to the bottom of the workpiece; the base support assembly is movable to one end of the workpiece and supports the end of the workpiece.

[0006] In some embodiments, the base support assembly includes a bracket, a first drive unit, and a base plate. The bracket is fixed on the fixed frame, the first drive unit is disposed on the bracket, and the output end of the first drive unit is connected to the base plate to drive the base plate to move up and down. The shape of the base plate matches the shape of one end of the workpiece for wrapping it.

[0007] In some embodiments, the base assembly further includes a first linear motion unit, which is fixed to the bracket, and the output end of the first linear motion unit is fixed to the base plate;

[0008] And / or two first linear motion units are provided, with the two first linear motion units located on both sides of the first drive unit respectively; the first linear motion unit includes a first bearing with a seat, the first bearing with a seat has a first slide rod inside, the first bearing with a seat is fixed on the bracket, the first slide rod slides up and down inside the first bearing with a seat, and the output end of the first slide rod is fixed on the base plate.

[0009] In some embodiments, the first clamping assembly includes a mounting plate, a second drive unit, and a side clamping plate unit. The mounting plate is fixed on the mounting frame, the second drive unit is fixed below the mounting plate, and the output end of the second drive unit is connected to the side clamping plate unit. The side clamping plate unit is fixed on the mounting plate and can move horizontally under the drive of the second drive unit.

[0010] In some embodiments, the first clamping assembly further includes a second linear motion unit, wherein two second linear motion units are provided, and the two second linear motion units are respectively located on both sides of the second driving unit;

[0011] The second linear motion unit includes a second bearing with a seat, a second slide rod inside the second bearing with a seat, the second bearing with a seat is fixed to the mounting plate, the second slide rod slides horizontally inside the second bearing with a seat, and the output end of the second slide rod is fixed to the side clamping plate unit;

[0012] And / or the side clamp unit includes a side clamp and a side clamp buffer layer, wherein the side clamp buffer layer is disposed on the inner side of the side clamp.

[0013] In some embodiments, the second clamping assembly includes a third drive unit and a lower pressure plate unit. The third drive unit passes through the mounting plate, and the lower pressure plate unit is fixed to one side of the side clamping plate unit. The output end of the third drive unit is connected to the lower pressure plate unit so that the lower pressure plate unit can move up and down.

[0014] And / or the lower pressure plate unit includes a lower pressure plate and a lower pressure plate buffer layer, wherein the lower pressure plate buffer layer is disposed below the lower pressure plate.

[0015] In some embodiments, the second clamping assembly further includes a third linear motion unit, wherein a plurality of third linear motion units are provided and arranged around the third drive unit;

[0016] The third linear motion unit includes a third bearing seat, which is fixed to the mounting plate and has a third slide rod inside it. The third slide rod slides up and down inside the third bearing seat, and the output end of the third slide rod is fixed to the lower pressure plate unit.

[0017] In some embodiments, the third clamping assembly includes a fourth driving unit, a connecting plate, and a fifth driving unit. The fourth driving unit is disposed on the back of the side clamping plate unit, and its output end is connected to the connecting plate to drive the connecting plate to move up and down. The fifth driving unit is disposed below the connecting plate, and its output end is equipped with a clamping plate. The fifth driving unit can drive the clamping plate to move horizontally to the bottom of the workpiece. The length of the clamping plate in the horizontal direction is greater than the thickness of the side clamping plate unit in the horizontal direction.

[0018] In some embodiments, the third clamping assembly further includes two linear slide rails, which are respectively located on both sides of the connecting plate, and the connecting plate can slide up and down along the linear slide rails.

[0019] In some embodiments, the clamp further includes a control component mounted on the fixture via a mounting component, and the control component is connected to the first clamping component, the second clamping component, the third clamping component, and the base support component, respectively.

[0020] Compared with the prior art, the clamp of the present invention has at least the following beneficial effects:

[0021] The fixture provided by the present invention includes a fixed frame and a first clamping assembly, a second clamping assembly, a third clamping assembly, and a base support assembly disposed on the fixed frame; two first clamping assemblies are disposed and located on both sides of the fixed frame respectively, and the two first clamping assemblies can move closer or further apart to clamp and release the workpiece; the second clamping assembly is located between the two first clamping assemblies and can move to the upper surface of the workpiece; the third clamping assembly is located outside the first clamping assemblies and can move to the bottom of the workpiece; the base support assembly can move to one end of the workpiece and support the end of the workpiece.

[0022] When clamping a workpiece using the fixture provided by this invention, the first clamping assembly first operates, with two first clamping assemblies moving close together to clamp the two sides of the workpiece; then the second clamping assembly and the bottom support assembly operate to press down and support the workpiece from the bottom; finally, the third clamping assembly operates to clamp the bottom of the workpiece. In other words, when clamping a workpiece, the fixture provided in this embodiment can clamp the two sides of the workpiece through the first clamping assembly, press down on the workpiece through the second clamping assembly, and lift the workpiece from the bottom through the third clamping assembly and the bottom support assembly, thereby achieving clamping of all surfaces of the workpiece. This solves the technical problems of low efficiency when manually handling workpieces and easy slippage when handling workpieces with ordinary fixtures; it also makes the workpiece transportation process more stable, avoiding damage to the workpiece caused by shaking during transportation.

[0023] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a clamp provided in an embodiment of the present invention;

[0026] Figure 2 This is another structural schematic diagram of a clamp provided in an embodiment of the present invention;

[0027] Figure 3 This is a front view of a clamp provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of a base support assembly in a clamp provided by an embodiment of the present invention;

[0029] Figure 5 This is a front view of a base support assembly in a clamp provided by an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of a first clamping assembly and a third clamping assembly in a fixture provided by an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of a second clamping assembly in a fixture provided by an embodiment of the present invention;

[0032] Figure 8 This is a partially enlarged view of the bottom support plate in a fixture provided by an embodiment of the present invention.

[0033] in:

[0034] 1. First clamping assembly; 11. Mounting plate; 12. Second drive unit; 13. Side clamping plate unit; 14. Second linear movement unit; 131. Side clamping plate; 132. Side clamping plate buffer layer; 141. Second bearing with seat; 142. Second slide rod;

[0035] 2. Second clamping assembly; 21. Third drive unit; 22. Lower pressure plate unit; 23. Third linear movement unit; 221. Lower pressure plate; 222. Lower pressure plate buffer layer; 231. Third bearing with seat; 232. Third slide rod;

[0036] 3. Third clamping assembly; 31. Fourth drive unit; 32. Connecting plate; 33. Fifth drive unit; 34. Clamping plate; 35. Linear slide rail;

[0037] 4. Fixture;

[0038] 5. Workpiece;

[0039] 6. Base support assembly; 61. Bracket; 62. First drive unit; 63. Base plate; 64. First linear motion unit; 641. First bearing with seat; 642. First slide rod;

[0040] 7. Mounting components; 71. Flange mounting plate; 72. Robot flange. Detailed Implementation

[0041] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0042] In the description of this invention, it should be clearly stated that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," "horizontal," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing this invention, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this invention.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] This embodiment provides a clamp, such as Figure 1-8As shown, the clamp includes a fixed frame 4 and a first clamping assembly 1, a second clamping assembly 2, a third clamping assembly 3, and a base support assembly 6 disposed on the fixed frame 4; two first clamping assemblies 1 are disposed and located on both sides of the fixed frame 4 respectively, and the two first clamping assemblies 1 can move closer or further apart to clamp and release the workpiece 5; the second clamping assembly 2 is located between the two first clamping assemblies 1 and can move to the upper surface of the workpiece 5; the third clamping assembly 3 is located outside the first clamping assembly 1 and can move to the bottom of the workpiece 5; the base support assembly 6 can move to one end of the workpiece 5 and support the end of the workpiece 5.

[0045] Specifically, the general outline of the fixing frame 4 is a rectangular structure surrounded by four sides, and two first clamping components 1 are respectively set at the two short sides of the rectangular structure; a second clamping component 2 is provided on the inner side of each first clamping component 1. Of course, only one second clamping component 2 can be provided. When only one is provided, it is preferably set between the two first clamping components 1; a third clamping component 3 is provided on the outer side of each first clamping component 1.

[0046] In practical use, the first clamping component 1 first operates, with the two first clamping components 1 moving closer to each other to clamp the two sides of the workpiece 5; then the second clamping component 2 and the bottom support component 6 operate to press down and support the workpiece 5 from the bottom; finally, the third clamping component 3 operates to clamp the bottom of the workpiece 5. In other words, when clamping the workpiece 5, the fixture provided in this embodiment can clamp the two sides of the workpiece through the first clamping component 1, press down the workpiece through the second clamping component 2, and lift the workpiece 5 from the bottom through the third clamping component 3 and the bottom support component 6, thereby achieving clamping of all surfaces of the workpiece. This solves the technical problems of low efficiency when manually handling workpieces and easy slippage when handling workpieces with ordinary fixtures; it also makes the transportation process of the workpiece 5 more stable and avoids damage to the workpiece 5 caused by shaking during transportation.

[0047] In a specific embodiment, such as Figure 4 and Figure 5 As shown, the base support assembly 6 includes a bracket 61, a first drive unit 62, and a base plate 63. The bracket 61 is fixed on the fixed frame 4, and the first drive unit 62 is disposed on the bracket 61. The output end of the first drive unit 62 is connected to the base plate 63 to drive the base plate 63 to move up and down. The shape of the base plate 63 matches the shape of one end of the workpiece 5 for wrapping it.

[0048] More specifically, the bracket 61 has a U-shaped structure, which includes a first side and a second side that are parallel to each other. The first side and the second side are both fixed on the fixed frame 4. A third side is provided between the first side and the second side. The first drive unit 62 is fixed on the outside of the third side. The telescopic end of the first drive unit 62 is fixedly connected to the base plate 63. The first drive unit 62 is a dual-axis cylinder.

[0049] In addition, the workpiece 5 provided in this embodiment can be a condenser. When the workpiece 5 is a condenser, such as... Figure 8 As shown, the bottom support plate 63 has a triangular groove, which can support the condenser along the two vertical surfaces of the bottom edge of the condenser to prevent the condenser from shaking.

[0050] In a specific embodiment, the base support assembly 6 further includes a first linear motion unit 64, which is fixed on the bracket 61, and the output end of the first linear motion unit 64 is fixed to the base support plate 63.

[0051] In the specific real-time process, the first linear moving unit 64 has a variety of different specific structures, mainly to prevent the base plate 63 from tilting during the movement. The first linear moving unit 64 can be a linear guide rail or a combination of bearings and slide rods.

[0052] For example, in one embodiment, two first linear motion units 64 are provided, and the two first linear motion units 64 are respectively located on both sides of the first drive unit 62; the first linear motion unit 64 includes a first bearing 641 with a first slide rod 642 inside the first bearing 641, the first bearing 641 is fixed on the bracket 61, the first slide rod 642 slides up and down inside the first bearing 641, and the output end of the first slide rod 642 is fixed on the base plate 63.

[0053] The first bearing 641 is fixed on the third side of the bracket 61, and the first slide rod 642 passes through the first bearing 641. In this way, during the up and down movement of the base plate 63, the first slide rod 642 moves within the first bearing 641, and its end works together with the telescopic end of the first drive unit 62 on the base plate 63, which can ensure the stability of the movement of the base plate 63.

[0054] In a specific embodiment, such as Figure 6 and Figure 7As shown, the first clamping assembly 1 includes a mounting plate 11, a second drive unit 12, and a side clamping plate unit 13. The mounting plate 11 is fixed on the fixing frame 4. The second drive unit 12 is fixed below the mounting plate 11, and the output end of the second drive unit 12 is connected to the side clamping plate unit 13. The side clamping plate unit 13 is fixed on the mounting plate 11 and can move horizontally under the drive of the second drive unit 12.

[0055] Specifically, the mounting plate 11 is a plate-shaped structure, and a second drive unit 12 is fixed at its lower end; the telescopic end of the second drive unit 12 faces the side clamping plate unit 13.

[0056] The second drive unit 12 is a clamping cylinder; thus, when it is necessary to clamp the workpiece 5, the telescopic ends of the two clamping cylinders pull the two side clamping plate units 13 to move closer to each other until the side clamping plate units 13 are in close contact with the side of the workpiece 5.

[0057] In a specific embodiment, the first clamping assembly 1 further includes a second linear movement unit 14, two of which are provided, and the two second linear movement units 14 are respectively located on both sides of the second driving unit 12;

[0058] In the specific real-time process, the second linear moving unit 14 has a variety of different specific structures, mainly to avoid the side clamping plate unit 13 from tilting during the movement. The second linear moving unit 14 can be a linear guide rail or a combination of bearings and slide rods.

[0059] For example, in one embodiment, the second linear movement unit 14 includes a second bearing 141 with a second slide rod 142 inside the bearing 141. The bearing 141 is fixed to the mounting plate 11, the slide rod 142 slides horizontally inside the bearing 141, and the output end of the slide rod 142 is fixed to the side clamping plate unit 13.

[0060] Since the second slide bar 142 can only move linearly within the hole defined by the second bearing 141, the side clamp unit 13 fixed on its output end can also only move linearly.

[0061] In a specific embodiment, the side clamping plate unit 13 includes a side clamping plate 131 and a side clamping plate buffer layer 132, wherein the side clamping plate buffer layer 132 is disposed on the inner side of the side clamping plate 131.

[0062] The side clamping plate buffer layer 132 covers the inner side of the side clamping plate 131, thus reserving sufficient space for the mounting plate 11 and the second linear movement unit 14. The side clamping plate buffer layer 132 is made of urethane, also known as polyurethane elastomer, which is a new type of material with good strength and low compression deformation. It is between plastic and rubber, possessing the rigidity of plastic and the elasticity of rubber. It can prevent damage to the workpiece 5 during clamping and also prevent the clamping purpose from being unachieved due to insufficient rigidity.

[0063] In a specific embodiment, such as Figure 7 As shown, the second clamping assembly 2 includes a third drive unit 21 and a lower pressure plate unit 22. The third drive unit 21 passes through the mounting plate 11, and the lower pressure plate unit 22 is fixed to one side of the side clamping plate unit 13. The output end of the third drive unit 21 is connected to the lower pressure plate unit 22 so that the lower pressure plate unit 22 can move up and down.

[0064] Specifically, the third drive unit 21 is a pressing cylinder that passes through the mounting plate 11. The extension end of the pressing cylinder is connected to a pressing plate unit 22. Under the drive of the pressing cylinder, the pressing plate unit 22 can move up and down to clamp the workpiece 5 from the upper surface.

[0065] In a specific embodiment, the second clamping assembly 2 further includes a third linear movement unit 23, and multiple third linear movement units 23 are provided, which are arranged around the third driving unit 21;

[0066] The third linear motion unit 23 includes a third bearing 231 with a seat, and a third slide rod 232 is provided inside the third bearing 231. The third bearing 231 is fixed on the mounting plate 11, and the third slide rod 232 slides up and down inside the third bearing 231. The output end of the third slide rod 232 is fixed on the lower pressure plate unit 22.

[0067] Preferably, four third linear movement units 23 are provided, located at the four corners of the mounting plate 11, to ensure the smooth movement of the lower pressure plate unit 22. Since the third slide rod 232 can only move linearly within the hole defined by the third bearing 231, the lower pressure plate unit 22 fixed on its output end can also only move linearly.

[0068] In a specific embodiment, the lower pressure plate unit 22 includes a lower pressure plate 221 and a lower pressure plate buffer layer 222, wherein the lower pressure plate buffer layer 222 is disposed below the lower pressure plate 221.

[0069] More specifically, the lower pressure plate buffer layer 222 covers the lower pressure plate 221; the lower pressure plate buffer layer 222 is made of urethane rubber, also known as polyurethane (PU) elastomer, which is a new type of material with good strength and low compression deformation. It is between plastic and rubber, possessing the rigidity of plastic and the elasticity of rubber. It can prevent damage to the workpiece 5 during clamping and also prevent the clamping purpose from being unachieved due to insufficient rigidity.

[0070] In a specific embodiment, the third clamping assembly 3 includes a fourth driving unit 31, a connecting plate 32, and a fifth driving unit 33. The fourth driving unit 31 is disposed on the back of the side clamping plate unit 13, and its output end is connected to the connecting plate 32 to drive the connecting plate 32 to move up and down. The fifth driving unit 33 is disposed below the connecting plate 32, and its output end is equipped with a clamping plate 34. The fifth driving unit 33 can drive the clamping plate 34 to move horizontally to the bottom of the workpiece 5.

[0071] The fourth drive unit 31 is a telescopic cylinder, mainly used to drive the connecting plate 32 to move up and down; the fifth drive unit 33 is a three-axis cylinder, mainly used to drive the clamping plate 34 to move horizontally.

[0072] Furthermore, the clamping plate 34 in this embodiment is a toothed clamping plate. The specific structure of the toothed clamping plate is as follows: it includes a vertical edge, and a horizontal edge extends from one side of the vertical edge. The horizontal edge has gaps, making it appear as if the horizontal edge is composed of multiple spaced teeth. This arrangement is intended to avoid excessive contact between the clamping plate 34 and the workpiece 5, which could cause wear to the workpiece 5.

[0073] In a specific embodiment, the third clamping assembly 3 further includes two linear slide rails 35, which are respectively located on both sides of the connecting plate 32, and the connecting plate 32 can slide up and down along the linear slide rails 35.

[0074] The linear guide rail 35 prevents the connecting plate 32 from tilting during its up-and-down movement.

[0075] In a specific embodiment, the length of the clamping plate 34 in the horizontal direction is greater than the thickness of the side clamping plate unit 13 in the horizontal direction.

[0076] In the specific implementation process, the clamping plate 34 moves inward. Because the length of the clamping plate 34 in the horizontal direction is greater than the thickness of the side clamping plate unit 13 in the horizontal direction, when the clamping plate 34 moves to the moving position, it can support the bottom of the workpiece 5.

[0077] In a specific embodiment, the clamp further includes a control component, which is mounted on the fixing frame 4 via the mounting component 7. The control component is connected to the first clamping component 1, the second clamping component 2, the third clamping component 3, and the base support component.

[0078] More specifically, the control component includes a robot, and the mounting component 7 includes a flange mounting plate 71, which is fixed to the mounting bracket 4. A robot flange 72 is provided on the flange mounting plate 71, through which the fixture and the robot can be fixed together.

[0079] More specifically, this embodiment achieves centralized control through a robot. When the robot senses the workpiece 5, it controls the first clamping assembly 1, the second clamping assembly 2, the third clamping assembly 3, and the bottom support assembly 6 to move. First, the clamping cylinder moves to clamp the two sides of the workpiece 5. Then, the pressing cylinder and the dual-axis cylinder move to press down and support the workpiece 5 from the bottom. Finally, the telescopic cylinder extends and the three-axis cylinder extends, the toothed clamping plate moves to below the workpiece 5, and the telescopic cylinder retracts the toothed clamping plate to clamp the bottom of the workpiece 5. The robot controls the coordinated actions of each part to achieve the function of clamping and transporting the workpiece 5 (multi-layer large condenser) from five sides.

[0080] When workpiece 5 is a condenser, the fixture provided in this embodiment can clamp the condenser on all five sides, preventing it from falling off during the robot's handling of multi-layer large condensers.

[0081] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0082] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A clamp, characterized in that, The clamp includes a fixed frame and a first clamping assembly, a second clamping assembly, a third clamping assembly, and a base support assembly disposed on the fixed frame. Two first clamping assemblies are provided and located on opposite sides of the fixed frame, and the two first clamping assemblies can move closer or further apart to clamp and release the workpiece. The second clamping assembly is located between the two first clamping assemblies and can move to the upper surface of the workpiece. The third clamping assembly is located outside the first clamping assemblies and can move to the bottom of the workpiece. The base support assembly can move to one end of the workpiece and support the end of the workpiece. The base support assembly includes a base support plate, a bracket fixed on the fixed frame, and a first drive unit. The output end of the first drive unit is connected to the base support plate to drive the base support plate to move up and down. The shape of the base support plate matches the shape of one end of the workpiece for wrapping it. The clamp also includes a control component, which is mounted on the mounting frame via a mounting component. The control component is connected to the first clamping component, the second clamping component, the third clamping component, and the base support component.

2. The clamp according to claim 1, characterized in that, The base assembly further includes a first linear motion unit, which is fixed on the bracket, and the output end of the first linear motion unit is fixed to the base plate. And / or two first linear motion units are provided, with the two first linear motion units located on both sides of the first drive unit respectively; the first linear motion unit includes a first bearing with a seat, the first bearing with a seat has a first slide rod inside, the first bearing with a seat is fixed on the bracket, the first slide rod slides up and down inside the first bearing with a seat, and the output end of the first slide rod is fixed on the base plate.

3. The clamp according to claim 1 or 2, characterized in that, The first clamping assembly includes a mounting plate, a second drive unit, and a side clamping plate unit. The mounting plate is fixed on the fixing frame, the second drive unit is fixed below the mounting plate, and the output end of the second drive unit is connected to the side clamping plate unit. The side clamping plate unit is fixed on the mounting plate and can move horizontally under the drive of the second drive unit.

4. The clamp according to claim 3, characterized in that, The first clamping assembly further includes a second linear motion unit, and two second linear motion units are provided, with the two second linear motion units located on both sides of the second drive unit respectively; The second linear motion unit includes a second seated bearing, and the second seated bearing has a second slide rod inside it. The second slide rod slides horizontally inside the second seated bearing, and the output end of the second slide rod is fixed on the side clamping plate unit. And / or the side clamp unit includes a side clamp and a side clamp buffer layer, wherein the side clamp buffer layer is disposed on the inner side of the side clamp.

5. The clamp according to claim 4, characterized in that, The second clamping assembly includes a third drive unit and a lower pressure plate unit. The third drive unit passes through the mounting plate, and the lower pressure plate unit is fixed to one side of the side clamping plate unit. The output end of the third drive unit is connected to the lower pressure plate unit so that the lower pressure plate unit can move up and down. And / or the lower pressure plate unit includes a lower pressure plate and a lower pressure plate buffer layer, wherein the lower pressure plate buffer layer is disposed below the lower pressure plate.

6. The clamp according to claim 5, characterized in that, The second clamping assembly further includes a third linear motion unit, wherein multiple third linear motion units are arranged around the third drive unit; The third linear motion unit includes a third bearing seat, which is fixed to the mounting plate and has a third slide rod inside it. The third slide rod slides up and down inside the third bearing seat, and the output end of the third slide rod is fixed to the lower pressure plate unit.

7. The clamp according to claim 3, characterized in that, The third clamping assembly includes a fourth driving unit, a connecting plate, and a fifth driving unit. The fourth driving unit is located on the back of the side clamping plate unit, and its output end is connected to the connecting plate to drive the connecting plate to move up and down. The fifth driving unit is located below the connecting plate, and its output end is equipped with a clamping plate. The fifth driving unit can drive the clamping plate to move horizontally to the bottom of the workpiece. The length of the clamping plate in the horizontal direction is greater than the thickness of the side clamping plate unit in the horizontal direction.

8. The clamp according to claim 7, characterized in that, The third clamping assembly also includes two linear slide rails, which are respectively located on both sides of the connecting plate, and the connecting plate can slide up and down along the linear slide rails.

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