Clamp device capable of being quickly remodeled

Abstract

The utility model provides a clamp device capable of being quickly changed, which comprises a frame, a clamping device, a clamping device and a clamping device, wherein the frame is provided with an accommodating space for accommodating a battery cell; the thickness adjusting assembly comprises two clamping arms which are oppositely arranged, and each clamping arm is provided with a pair of clamping pliers capable of adjusting the size of a clamping opening; the centering adjusting assembly comprises a guide piece and a moving piece movably matched with the guide piece, and the moving piece is connected with the two clamping arms through first connecting pieces respectively so as to ensure that the two clamping arms clamp the battery cell in the middle; the height adjusting assembly comprises a base plate and a lifting unit, the base plate is located in the containing space, and the lifting unit is used for adjusting the vertical distance between the base plate and the clamping arm; the reset assembly comprises a positioning piece, a reset piece and a pulling piece; the pulling part can move in the Y-axis direction under stress to enable the two clamping arms to be far away from each other so as to loosen the battery cell, and the reset part provides elastic force for the two clamping arms to draw close to clamp the battery cell. The device is convenient to change, meets the size requirements of different types of battery cells, and is good in stability and high in working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to a clamp device capable of rapid changeover. Background Art

[0002] The fast-changing fixture device plays a vital role in the sealing nail welding process. It is mainly used to position and fix the parts to be welded to ensure the accuracy and stability of the welding process.

[0003] The fixtures need to be replaced for different sizes, and the replacement process requires time and manpower to dismantle, install and debug the fixtures, which will increase the downtime of the production line and reduce production efficiency. In addition, the debugging and calibration of the new fixtures takes some time, and during this period, unstable welding products may be produced, affecting product quality and customer satisfaction. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a fixture device that can be quickly changed, which is convenient for changing shapes, meets the requirements of different battery cell sizes, has good stability, high work efficiency, and ensures product processing quality.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A clamp device capable of rapid changeover comprises: a frame having a storage space for placing a battery cell; a thickness adjustment component comprising two clamping arms arranged opposite to each other, the clamping arms being provided with clamping pliers capable of adjusting the size of a clamping opening; a centering adjustment component comprising a guide member and a movable member movably matched with the guide member, the movable member being respectively connected to the two clamping arms through a first connecting member to ensure that the two clamping arms clamp the battery cell in the center; a height adjustment component comprising a pad and a lifting unit, the pad being located in the storage space, the lifting unit being used to adjust the vertical distance between the pad and the clamping arms; a reset component comprising a positioning member, a reset member and a pulling member; the pulling member being subjected to force and being movable along the Y-axis direction to cause the two clamping arms to move away from each other to release the battery cell, the reset member providing elastic force for the two clamping arms to move closer to each other and clamp the battery cell.

[0007] According to a preferred embodiment, an adjustment mechanism is provided on one side of one of the clamping arms, and the adjustment mechanism causes the two clamping arms to move closer to or farther away from each other along the Y-axis direction to adjust the distance between the two clamping arms.

[0008] According to a preferred embodiment, the adjustment mechanism includes an adjustment screw and an adjustment movable part, the adjustment movable part is arranged on one of the clamping arms, and the adjustment movable part is connected to the adjustment screw, and the adjustment screw causes the clamping arm to move horizontally along the Y-axis direction through the adjustment movable part.

[0009] According to a preferred embodiment, the positioning member is arranged on the side wall of the frame, and the reset member is arranged on the positioning member, the pulling member is connected to one end of the reset member, and the adjusting screw rod is arranged on the pulling member;

[0010] The positioning member is provided with a first limiting member and a second limiting member to limit the relative displacement of the pulling member.

[0011] According to a preferred embodiment, each of the clamping arms comprises a transmission member and at least two of the clamping pliers, and driving the transmission member can synchronously adjust the sizes of the clamping openings of at least two of the clamping pliers.

[0012] According to a preferred embodiment, the clamping pliers includes a first clamping member and a second clamping member, the transmission member is a bidirectional screw, all the first clamping members are connected to the bidirectional screw via a second connecting member, and all the second clamping members are connected to the bidirectional screw via a third connecting member. Rotating the bidirectional screw can synchronously cause the first clamping member and the second clamping member in each of the clamping pliers to move closer to or away from each other along the X-axis direction.

[0013] According to a preferred embodiment, a limiting notch is provided at one end of the first clamp and the other end of the second clamp, and a clamping opening is formed in the area between the two limiting notches to limit one end of the battery cell.

[0014] According to a preferred embodiment, the limiting notch includes a first end face, a second end face, a third end face and a fourth end face which are connected in sequence, and the first end face and the third end face are both arranged parallel to the Y-axis direction, wherein the distance between the first end face of the first clamp and the first end face of the second clamp is greater than the distance between the third end face of the first clamp and the third end face of the second clamp, the second end face is arranged at an angle, and the fourth end face is arranged perpendicular to the third end face.

[0015] According to a preferred embodiment, the lifting unit includes a lifting screw and a lifting movable part, the lifting movable part is arranged on the pad, and the lifting movable part cooperates with the lifting screw to adjust the vertical height of the pad.

[0016] According to a preferred embodiment, it also includes two Y-axis guide rails arranged in parallel, the two Y-axis guide rails are arranged on the top of the frame, and both ends of each clamping arm are slidably matched with the two Y-axis guide rails.

[0017] According to a preferred embodiment, the lifting unit includes two lifting screws and two lifting movable parts, the two lifting screws are vertically arranged inside the frame, the two lifting movable parts are respectively arranged on the pad, the two lifting movable parts are movably cooperated with the lifting screws, and the two lifting screws are driven to lift and lower through a lifting drive part.

[0018] According to a preferred embodiment, an elastic member is provided at the bottom of the pad.

[0019] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0020] The utility model application is provided with a thickness adjustment component, which can adjust the size of the clamping mouth, so as to clamp battery cells of different thicknesses; the centering adjustment component can ensure that the clamping arm clamps the two ends of the battery cell in the center, avoiding asymmetric clamping or unstable fixation affecting the processing quality; the height adjustment component can adjust the height of the clamp to meet the needs of clamping battery cells of different heights; the reset component provides elastic force to keep the battery cells clamped, which is convenient for replacing batches of battery cells. The corresponding battery cells can be replaced by simply pulling, reducing the adjustment steps and improving work efficiency. This solution is convenient for model change, meets the size requirements of different types of battery cells, has good stability, high work efficiency, and ensures product processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a clamp device capable of rapid changeover provided in Example 1 of the utility model;

[0023] Figure 2 A schematic diagram of the top view of the clamping arm provided in Example 1 of the utility model;

[0024] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0025] Figure 4A schematic top view of a fast-changeable clamp device provided in Example 1 of the utility model;

[0026] Figure 5 A bottom view structural schematic diagram of a fast-changeable clamp device provided in Example 1 of the utility model;

[0027] Figure 6 A schematic structural diagram of a fast-changeable clamp device provided in Example 1 of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the reset assembly provided in Example 1 of the utility model.

[0029] icon:

[0030] 1. Frame; 2. Clamping arm; 21. Clamping pliers; 211. First clamping member; 212. Second clamping member; 22. Second connecting member; 23. Third connecting member; 24. Transmission member; 3. Guide member; 31. Moving member; 32. First connecting member; 4. Pad; 41. Lifting unit; 411. Lifting screw rod; 412. Lifting movable member; 5. Positioning member; 51. First limiting member; 52. Second limiting member; 6. Resetting member; 7. Pulling member; 8. Adjusting mechanism; 81. Adjusting screw rod; 82. Adjusting movable member; 9. Limiting notch; 91. First end face; 92. Second end face; 93. Third end face; 94. Fourth end face; 10. Y-axis guide rail; 11. Lifting drive member; 12. Accommodating space. DETAILED DESCRIPTION

[0031] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] Example 1

[0035] Please refer to Figures 1 to 7 , please refer to Figures 1 to 7 A clamp device capable of rapid changeover comprises: a frame 1, wherein the frame 1 has a receiving space 12 for placing a battery cell; a thickness adjustment component, comprising two clamping arms 2 arranged opposite to each other, wherein the clamping arms 2 are provided with clamping pliers 21 capable of adjusting the size of a clamping opening; a centering adjustment component, comprising a guide member 3, a moving member 31 movably matched with the guide member 3, wherein the moving member 31 is respectively connected to the two clamping arms 2 through a first connecting member 32 to ensure that the two clamping arms 2 clamp the battery cell in the center; a height adjustment component, comprising a pad 4 and a lifting unit 41, wherein the pad 4 is located in the receiving space 12, and the lifting unit 41 is used to adjust the vertical distance between the pad 4 and the clamping arms 2; a reset component, wherein the reset component comprises a positioning member 5, a reset member 6 and a pulling member 7; the pulling member 7 is subjected to a force and can move along the Y-axis direction to cause the two clamping arms 2 to move away from each other to release the battery cell, and the reset member 6 provides elastic force for the two clamping arms 2 to move closer to each other and clamp the battery cell.

[0036] Furthermore, an adjustment mechanism 8 is provided on one side of a clamping arm 2 , and the adjustment mechanism 8 forces the two clamping arms 2 to move closer to or farther away from each other along the Y-axis direction, so as to adjust the distance between the two clamping arms 2 .

[0037] Furthermore, the adjustment mechanism 8 includes an adjustment screw 81 and an adjustment movable member 82. The adjustment movable member 82 is disposed on a clamping arm 2 and connected to the adjustment screw 81. The adjustment screw 81 causes the clamping arm 2 to move horizontally along the Y-axis direction through the adjustment movable member 82.

[0038] Further, the positioning member 5 is arranged on the side wall of the frame 1, and the reset member 6 is arranged on the positioning member 5, the pulling member 7 is connected to one end of the reset member 6, and the adjusting screw rod 81 is arranged on the pulling member 7;

[0039] The positioning member 5 is provided with a first limiting member 51 and a second limiting member 52 to limit the relative displacement of the pulling member 7 .

[0040] Furthermore, each clamping arm 2 includes a transmission member 24 and at least two clamping jaws 21 , and the driving transmission member 24 can synchronously adjust the clamping opening sizes of the at least two clamping jaws 21 .

[0041] Furthermore, the clamping pliers 21 include a first clamping member 211 and a second clamping member, the transmission member 24 is a bidirectional screw, all the first clamping members 211 are connected to the bidirectional screw via the second connecting member 22, and all the second clamping members are connected to the bidirectional screw via the third connecting member 23. Rotating the bidirectional screw can synchronously cause the first clamping member 211 and the second clamping member in each clamping pliers 21 to move closer to or away from each other along the X-axis direction.

[0042] Furthermore, a limiting notch 9 is provided at one end of the first clamping member 211 and the other end of the second clamping member 212 , and a clamping opening is formed in the area between the two limiting notches 9 to limit one end of the battery cell.

[0043] Furthermore, the limiting notch 9 includes a first end face 91, a second end face 92, a third end face 93 and a fourth end face 94 which are connected in sequence, and the first end face 91 and the third end face 93 are both arranged in parallel along the Y-axis direction, wherein the distance between the first end face 91 of the first clamp 211 and the first end face 91 of the second clamp is greater than the distance between the third end face 93 of the first clamp 211 and the third end face 93 of the second clamp, the second end face 92 is arranged at an angle, and the fourth end face 94 is arranged perpendicular to the third end face 93.

[0044] Furthermore, the lifting unit 41 includes a lifting screw rod 411 and a lifting movable member 412 . The lifting movable member 412 is disposed on the pad 4 . The lifting movable member 412 movably cooperates with the lifting screw rod 411 to adjust the vertical height of the pad 4 .

[0045] Furthermore, two Y-axis guide rails 10 are arranged in parallel. The two Y-axis guide rails 10 are arranged on the top of the frame 1, and both ends of each clamping arm 2 are slidably matched with the two Y-axis guide rails 10.

[0046] Furthermore, the lifting unit 41 includes two lifting screw rods 411 and two lifting movable parts 412. The two lifting screw rods 411 are vertically arranged inside the frame 1, and the two lifting movable parts 412 are respectively arranged on the pad 4. The two lifting movable parts 412 are movably cooperated with the lifting screw rods 411, and the two lifting screw rods 411 are driven to lift and lower through a lifting drive part 11.

[0047] Furthermore, an elastic member is provided at the bottom of the pad 4 .

[0048] The working principle of this utility model:

[0049] In this embodiment, the thickness adjustment component, the centering adjustment component, the height adjustment component and the reset component are all arranged on the frame 1, and the pad 4 is located in the accommodating space 12 of the frame 1. The accommodating space 12 of the frame 1 is provided with multiple pads 4 arranged side by side, and each pad 4 can be placed on a corresponding battery cell. The bottom of each pad 4 is provided with an elastic member, which is used to provide elasticity to avoid rigid collision during the processing process that causes damage to the battery cell, which is beneficial to protecting the battery cell. Figure 4 And attached Figure 6 It can be seen that the moving direction of the lifting unit 41 is the Z-axis direction, that is, Figure 6 In the vertical direction, the clamping arm 2 moves in the Y-axis direction, that is, Figure 6 The left and right moving directions in the figure, the moving directions of the first clamping member 211 and the second clamping member 212 are the X-axis direction, that is, the front and back moving directions.

[0050] The adjusting screw 81, the bidirectional screw, and the lifting screw 411 mentioned in this embodiment are all self-locking screws to avoid loosening after adjustment and affect the accuracy of clamping and fixing. The bidirectional screw includes two sections of thread directions with opposite directions, so that the second connecting member 22 and the third connecting member 23 can be simultaneously moved closer or farther away by rotating the bidirectional screw, thereby driving multiple first clamps 211 and multiple second clamps to move closer to each other one by one. In this embodiment, the first clamps 211 and the second clamps are arranged alternately in sequence, so that each first clamp 211 corresponds to a second clamp to form a clamp 21. The second connecting member 22 can select a rod-shaped or sheet-shaped connecting structure to connect multiple first clamps 211 and connect to a section of the bidirectional screw through its connecting end. Similarly, the third connecting member 23 can select a rod-shaped or sheet-shaped connecting structure to connect multiple second clamps and connect to another section of the bidirectional screw through its connecting end. The thread directions of the above two sections of the bidirectional screw are opposite. When the bidirectional screw rod is rotated clockwise, the second connecting member 22 and the third connecting member 23 can be brought closer together, or when the bidirectional screw rod is rotated clockwise, the second connecting member 22 and the third connecting member 23 can be brought closer together. Similarly, counterclockwise rotation is the opposite direction of clockwise rotation.

[0051] In this embodiment, the two Y-axis guide rails 10 and the two clamping arms 2 can form a rectangular setting, and the two clamping arms 2 move closer to each other along the Y-axis direction to compress the top space of the accommodating space 12. The limiting notch 9 of the first clamp 211 in each clamping clamp 21 and the limiting notch 9 of the second clamp cooperate to form a clamping opening, and the clamping opening of the clamping clamp 21 can clamp one end of the battery cell, wherein the second end face 92 of the limiting notch 9 is inclined, which can prompt one end of the battery cell to slide in, making it easier for the clamping clamp 21 to clamp and position the battery cell, and the diameter of the clamping opening gradually decreases from the outside to the inside, that is, the distance between the first end face 91 of the first clamp 211 and the first end face 91 of the second clamp is greater than the distance between the third end face 93 of the first clamp 211 and the third end face 93 of the second clamp.

[0052] Adjust the movable member 82 to be installed on Figure 4On the clamping arm 2 on the right side, the clamping arm 2 can be driven to reciprocate left and right along the Y-axis direction by driving the adjusting screw rod 81. When the clamping arm 2 on the right side moves to the left, the clamping arm 2 on the left side (the other) is connected to the clamping arm 2 on the right side due to the connection of the center adjustment component, so that the clamping arm 2 on the left side also moves toward the clamping arm 2 on the right side at the same time. The clamping arm 2 on the right side is connected to the moving member 31 through the first connecting member 32, and the clamping arm 2 on the left side is also connected to the moving member 31 through another first connecting member 32, and the moving member 31 slides along the vertically arranged guide member 3, and the guide member 3 can select a slide rail, and the moving member 31 can select a slider. Therefore, when the clamping arm 2 on the right side moves to the left, the moving member 31 can move downward along the guide member 3 through the first connecting member 32, and the moving member 31 drives the clamping arm 2 on the left side to move to the right through another first connecting member 32, so that the two clamping arms 2 are brought closer to each other. Similarly, when the clamping arm 2 on the right side moves to the right, the clamping arm 2 on the left side will also move to the left, and the two will move away from each other at the same time. It should be noted that the two first connecting members 32 are connected to the moving member 31 or the clamping arm 2 to provide flexible or movable connection conditions, or to provide a gap to prevent the clamping arm 2 and the first connecting member 32 or the moving member 31 and the clamping arm 2 from being unable to move due to rigidity problems. In this embodiment, the two first connecting members 32 have the same length, and the guide member 3 and the moving member 31 are both arranged at the midpoint of the line connecting the two clamping arms 2, so the centering adjustment component can ensure that the battery cell is placed in the center of the two clamping arms 2 to ensure centering clamping.

[0053] Figure 4 As shown, the pulling member 7 can be driven by a manual or driving member to move to the right along the Y-axis direction (the direction away from the clamping arm 2). After the pulling member 7 moves to the right, since the pulling member 7 in this embodiment is connected to the clamping arm 2 through the adjustment mechanism 8, the pulling member 7 moves to the right and drives the clamping arm 2 on the right to move to the right at the same time, and the clamping arm 2 on the left (the other side) moves to the left synchronously, so that the clamped battery cell can be released. The distance between the two clamping arms 2 corresponds to the width of the battery cell, the clamping opening size / caliber size of the clamping pliers 21 corresponds to the thickness of the battery cell, and the distance between the pad 4 and the clamping arm 2 corresponds to the height of the battery cell. The reset member 6 provides the reset power for the pulling member 7. When the pulling member 7 moves to the right, the reset member 6 has a pulling force to the left on the pulling member 7, which keeps the force of the clamping arm 2 on the right side to the left, that is, it has a clamping force on the battery cell. The reset member 6 can be a spring, and the spring is set on the positioning member 5. This embodiment is one of the ways to install the reset member 6. The positioning member 5 provides an installation space for the reset member 6, and a first limiting member 51 is set to limit the displacement of the pulling member 7 to the left, and a second limiting member 52 is set to limit the displacement of the pulling member 7 to the right. The first limiting member 51 is set at the top of the left end of the positioning member 5, and the second limiting member 52 is set at the top of the right end of the positioning member 5 (the same position as the reset member 6). The second limiting member 52 can limit the position of the connecting end of the reset member 6 and the pulling member 7, thereby limiting the position of the pulling member 7.

[0054] In this embodiment, two lifting screw rods 411 are vertically arranged on the front and rear inner walls of the frame 1, and two guide members 3 are arranged on the front and rear outer walls of the frame 1. The lifting screw rods 411 and the guide members 3 do not interfere with each other. The two clamping arms 2 are respectively located on the left and right sides of the lifting screw rods 411 and the guide members 3, which effectively saves space. The two lifting movable parts 412 are respectively arranged on the pad 4 to ensure the balance of the lifting and lowering of the pad 4. The two lifting movable parts 412 are movably coordinated with the lifting screw rods 411, and the two lifting screw rods 411 are driven to lift and lower through a lifting driving member 11. The lifting driving member 11 can be selected from a screw rod, which is connected to the two lifting screw rods 411 by sleeves of two bevel gears. When the lifting driving member 11 is rotated, the lifting screw rod 411 can be rotated, thereby prompting the lifting movable part 412 to lift up and down, and adjust the vertical height of the pad 4.

[0055] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A fixture device capable of rapid changeover, characterized in that: include: A frame having a housing space for placing a battery cell; The thickness adjustment component comprises two clamping arms arranged opposite to each other, wherein the clamping arms are provided with clamping pliers capable of adjusting the size of the clamping opening; A centering adjustment component, comprising a guide member and a moving member movably matched with the guide member, wherein the moving member is respectively connected to the two clamping arms through a first connecting member to ensure that the two clamping arms clamp the battery cell in the center; A height adjustment assembly, comprising a pad and a lifting unit, wherein the pad is located in the accommodating space, and the lifting unit is used to adjust the vertical distance between the pad and the clamping arm; The reset component includes a positioning member, a reset member and a pulling member; the pulling member can be moved along the Y-axis direction under force to cause the two clamping arms to move away from each other to release the battery cell, and the reset member provides elastic force for the two clamping arms to move closer to each other and clamp the battery cell.

2. The fast-changeable fixture device according to claim 1, characterized in that: An adjustment mechanism is provided on one side of one of the clamping arms, and the adjustment mechanism causes the two clamping arms to move closer to or farther away from each other along the Y-axis direction, so as to adjust the distance between the two clamping arms.

3. The fast-changeable fixture device according to claim 2, characterized in that: The adjusting mechanism comprises an adjusting screw and an adjusting movable part, wherein the adjusting movable part is arranged on one of the clamping arms and connected to the adjusting screw. The adjusting screw causes the clamping arm to move horizontally along the Y-axis direction through the adjusting movable part.

4. The fast-changeable fixture device according to claim 1, characterized in that: The positioning member is arranged on the side wall of the frame, and the reset member is arranged on the positioning member, the pulling member is connected to one end of the reset member, and the adjusting screw rod is arranged on the pulling member; The positioning member is provided with a first limiting member and a second limiting member to limit the relative displacement of the pulling member.

5. The fast-changeable fixture device according to claim 1, characterized in that: Each of the clamping arms comprises a transmission member and at least two clamping pliers, and the transmission member can be driven to synchronously adjust the clamping opening sizes of at least two clamping pliers.

6. The fast-changeable fixture device according to claim 5, characterized in that: The clamping pliers include a first clamp and a second clamp, the transmission member is a bidirectional screw, all the first clamps are connected to the bidirectional screw via a second connecting member, and all the second clamps are connected to the bidirectional screw via a third connecting member. Rotating the bidirectional screw can synchronously cause the first clamp and the second clamp in each of the clamping pliers to move closer to or away from each other along the X-axis direction.

7. The fast-changeable fixture device according to claim 6, characterized in that: A limiting notch is provided at one end of the first clamp and the other end of the second clamp, and a clamping opening is formed in the area between the two limiting notches to limit one end of the battery cell.

8. The fast-changeable fixture device according to claim 7, characterized in that: The limiting notch includes a first end face, a second end face, a third end face and a fourth end face which are connected in sequence, the first end face and the third end face are both arranged in parallel along the Y-axis direction, the distance between the first end face of the first clamp and the first end face of the second clamp is greater than the distance between the third end face of the first clamp and the third end face of the second clamp, the second end face is arranged at an angle, and the fourth end face is arranged perpendicular to the third end face.

9. The fast-changeable fixture device according to claim 1, characterized in that: The lifting unit comprises a lifting screw and a lifting movable part, wherein the lifting movable part is arranged on the pad, and the lifting movable part cooperates with the lifting screw to adjust the vertical height of the pad.

10. The fast-changeable fixture device according to claim 1, characterized in that: It also includes two Y-axis guide rails arranged in parallel, the two Y-axis guide rails are arranged on the top of the frame, and both ends of each clamping arm are slidably matched with the two Y-axis guide rails.

11. The fast-changeable fixture device according to claim 9, characterized in that: The lifting unit includes two lifting screws and two lifting movable parts. The two lifting screws are vertically arranged inside the frame. The two lifting movable parts are respectively arranged on the pad. The two lifting movable parts cooperate with the lifting screws, and the two lifting screws are driven to lift through a lifting drive part.

12. The fast-changeable fixture device according to claim 1, characterized in that: An elastic member is arranged at the bottom of the pad.

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