Clamping jig and positioning mechanism

Abstract

The utility model discloses a clamping jig and positioning mechanism, the clamping jig comprises a base plate, a movable connecting plate, a first positioning block, a first tensioning block and a first elastic piece, the first positioning block is arranged on the base plate, the first tensioning block is arranged on the base plate in a sliding mode along a first direction, the movable connecting plate is arranged on the base plate in a rotating mode, and the first elastic piece is arranged on the movable connecting plate. The first elastic piece is arranged between the bottom plate and the first tensioning block. During positioning, the movable connecting plate can be manually rotated, so that the first tensioning block moves from the front end of the first arc-shaped area to the rear end of the first arc-shaped area, and meanwhile, the first tensioning block moves in the first direction and is close to the first positioning block, so that the first tensioning block and the first positioning block are sleeved with a product; and then the first tensioning block is pushed / pulled by the first elastic piece to move in the first direction and be away from the first positioning block, so that the product is positioned and fixed by the first positioning block and the first tensioning block, and meanwhile, the first elastic piece further pushes / pulls the first tensioning block to move to the front end of the first arc-shaped area again.

Description

Technical Field

[0001] The utility model relates to the technical field of product clamping, in particular to a clamping fixture and a positioning mechanism. Background Art

[0002] When laser processing is used on the frame of small products such as mobile phones, since the processing area is the entire outer frame of the product, the product is usually clamped by manually adjusting the tension block during production. During the clamping process, it is necessary to manually loosen the screws, install the product at the predetermined position and adjust the position, and then lock the screws to fix the product. Since the screws need to be constantly loosened and tightened, the clamping efficiency of the product is slow. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the present application provides a clamping fixture and a positioning mechanism that can quickly clamp and position products.

[0004] This embodiment adopts the following technical solutions:

[0005] A clamping fixture, comprising:

[0006] Base plate;

[0007] A first positioning block, disposed on the bottom plate;

[0008] A first tensioning block is slidably disposed on the bottom plate along a first direction;

[0009] A movable connecting plate is rotatably arranged on the bottom plate, the movable connecting plate is provided with a first arc-shaped area, the first tensioning block is slidably connected to the movable connecting plate along the first arc-shaped area, and the distance between the front end of the first arc-shaped area and the rotation center of the movable connecting plate is greater than the distance between the rear end of the first arc-shaped area and the rotation center of the movable connecting plate; and

[0010] A first elastic member is disposed between the base plate and the first tensioning block. The first elastic member can push / pull the first tensioning block to move along a first direction and away from the first positioning block, and at the same time move the first tensioning block from the rear end of the first arc-shaped area to the front end of the first arc-shaped area.

[0011] Furthermore, the clamping fixture also includes a first connecting member, a first sliding groove is opened on the movable connecting plate, the first sliding groove coincides with the first arc-shaped area, and the first connecting member passes through the first sliding groove and is connected to the first tensioning block.

[0012] Furthermore, the clamping fixture also includes a first mounting block, which is arranged on the base plate, a cavity is formed inside the first mounting block, and a first opening and a second opening are provided to connect the cavity, the first tensioning block is slidably arranged in the first mounting block along a first direction, and is exposed to the first mounting block through the first opening, the first connecting member passes through the first sliding groove and the second opening in sequence and is connected to the first tensioning block, and the first connecting member can slide in the second opening along the first direction.

[0013] Furthermore, in the clamping fixture, the first tensioning block includes a first tensioning portion and a first limiting portion, the first limiting portion is connected to the side of the first tensioning portion and is clamped in the first opening, and the first elastic member is a spring, one end of which is sleeved on the first tensioning portion and abuts against the first limiting portion, and the other end abuts against the inner wall of the first mounting block.

[0014] Furthermore, the clamping fixture also includes a second positioning block, a second tensioning block and a second elastic member, which define an angle between the first direction and the second direction, the second positioning block is arranged on the base plate, the second tensioning block is slidably arranged on the base plate along the second direction, the movable connecting plate is also provided with a second arc zone, the second tensioning block is slidably connected to the movable connecting plate along the second arc zone, the distance between the front end of the second arc zone and the rotation center of the movable connecting plate is greater than the distance between the rear end of the second arc zone and the rotation center of the movable connecting plate, the second elastic member is arranged between the base plate and the first tensioning block, the second elastic member can push / pull the second tensioning block to move along the second direction and away from the second positioning block, and at the same time make the second tensioning block move from the rear end of the second arc zone to the front end of the second arc zone.

[0015] Furthermore, in the clamping fixture, the first direction is perpendicular to the second direction.

[0016] Furthermore, in the clamping fixture, the length of the first arc-shaped area is greater than the length of the second arc-shaped area.

[0017] Furthermore, the clamping fixture also includes a second connecting piece and a second mounting block, the movable connecting plate is provided with a second sliding groove, the second sliding groove coincides with the second arc area, the second connecting piece passes through the second sliding groove and is connected to the second tensioning block, the second mounting block is arranged on the bottom plate, a cavity is formed inside the second mounting block, and a third opening and a fourth opening communicating with the cavity are provided, the second tensioning block is slidably arranged in the second mounting block along the second direction, and is exposed to the second mounting block through the third opening, the second connecting piece sequentially passes through the second sliding groove and the third opening and is connected to the first tensioning block, the second connecting piece can slide in the fourth opening along the second direction, the second tensioning block includes a second tensioning portion and a second limiting portion, the second limiting portion is connected to the side of the second tensioning portion, and is clamped in the third opening, the second elastic piece is a spring, one end of which is sleeved on the second tensioning portion and abuts against the second limiting portion, and the other end abuts against the inner wall of the second mounting block.

[0018] Furthermore, the clamping fixture also includes a knob, which is connected to the rotation center of the movable connecting plate.

[0019] A positioning mechanism comprises a driving platform and the above-mentioned clamping fixture, wherein the clamping fixture is arranged at the driving end of the driving platform.

[0020] Compared with the prior art, the present application provides a clamping fixture and positioning mechanism, which can manually rotate the movable connecting plate to move the first tensioning block from the front end of the first arc zone to the rear end of the first arc zone. At this time, the first tensioning block will move along the first direction and approach the rotation center of the first positioning block and the movable connecting plate to reduce the distance between the first tensioning block and the first positioning block, which is convenient for placing the product on the outside of the first tensioning block and the first positioning block; then the first elastic member pushes / pull the first tensioning block to move along the first direction and away from the rotation center of the first positioning block and the movable connecting plate, so that the product is positioned and fixed by the first positioning block and the first tensioning block. At the same time, the first elastic member will also push / pull the first tensioning block and the movable connecting plate to rotate relative to each other, so that the first tensioning block moves to the front end of the first arc zone again. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the clamping fixture provided in this application.

[0022] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the clamping fixture shown.

[0023] Figure 3 for Figure 1 The product installation diagram of the clamping fixture is shown.

[0024] Figure 4 for Figure 1 Schematic diagram of the compressed state of the clamping fixture shown.

[0025] Figure 5 for Figure 1 Schematic diagram of the extended state of the clamping fixture shown.

[0026] Figure 6 This is a schematic diagram of the overall structure of a specific embodiment of the positioning mechanism provided in this application.

[0027] Among them, 10, bottom plate; 20, movable connecting plate; 21, first slide groove; 22, second slide groove; 30, first positioning block; 40, first tensioning block; 41, first tensioning part; 42, first limiting part; 50, first elastic member; 60, knob; 70, first connecting member; 80, first mounting block; 81, first opening; 82, second opening; 90, second positioning block; 100, second tensioning block; 110, second elastic member; 120, second connecting member; 130, second mounting block; 1, clamping fixture; 2, product; 3, four-axis platform. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Without further description, the elements, structures and features in one embodiment can also be beneficially combined with other embodiments.

[0029] It should be noted that when a metastructure is referred to as being "fixed to" or "set on" another metastructure, it may be directly on the other metastructure or indirectly on the other metastructure. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0030] The orientation or positional relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element structure referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0031] See also Figure 1 and Figure 2The clamping fixture provided in the present application includes a base plate 10, a movable connecting plate 20, a first positioning block 30, a first tensioning block 40 and a first elastic member 50. The first positioning block 30 is arranged on the base plate 10, the first tensioning block 40 is slidably arranged on the base plate 10 along a first direction, the movable connecting plate 20 is rotatably arranged on the base plate 10, and the first elastic member 50 is arranged between the base plate 10 and the first tensioning block 40.

[0032] The first direction may be any direction parallel to the surface of the bottom plate 10, and the first tensioning block 40 and the first positioning block 30 may be sequentially arranged on the bottom plate 10 along the first direction. Figure 3 When the clamping fixture 1 clamps the product 2, the mobile phone frame, tablet frame and other products are sleeved on the outside of the first positioning block 30 and the first tensioning block 40, and the first elastic member 50 can push / pull the first tensioning block 40 to move along the first direction to move away from the first positioning block 30, so that the product 2 is positioned and fixed by the first positioning block 30 and the first tensioning block 40.

[0033] The movable connecting plate 20 is preset with a first arc-shaped area, and the first tensioning block 40 can be slidably connected to the movable connecting plate 20 along the first arc-shaped area. In addition, the rotation center of the movable connecting plate 20 rotating around the bottom plate 10 can be located between the first tensioning block 40 and the first positioning block 30, and the distance between the front end of the first arc-shaped area and the rotation center of the movable connecting plate 20 is greater than the distance between the rear end of the first arc-shaped area and the rotation center of the movable connecting plate 20.

[0034] The first elastic member 50 can provide a force for positioning the product. Specifically, after the first elastic member 50 generates elastic force, it will push / pull the first tensioning block 40 to move along the first direction and away from the rotation center of the first positioning block 30 and the movable connecting plate 20, and at the same time, the first tensioning block 40 and the movable connecting plate 20 will rotate relative to each other, so that the first tensioning block 40 moves from the rear end of the first arc-shaped area to the front end of the first arc-shaped area.

[0035] See also Figure 4 Before clamping the product, the clamping fixture needs to be in a compressed state. The movable connecting plate 20 can be manually rotated to drive the first tensioning block 40 to move toward the rear end of the first arc-shaped area, so that the first tensioning block 40 is close to the rotation center of the movable connecting plate 20, and the first tensioning block 40 is moved along the first direction and close to the first positioning block 30, so as to reduce the distance between the first tensioning block 40 and the first positioning block 30, so as to facilitate the product to be sleeved on the outside of the first tensioning block 40 and the first positioning block 30. In this process, the first elastic member 50 is stretched or compressed to store elastic potential energy.

[0036] See also Figure 5After the driving force on the movable connecting plate 20 is released, the clamping fixture is in an extended state, and the first elastic member 50 will push / pull the first tensioning block 40 to move along the first direction to move away from the rotation center of the first positioning block 30 and the movable connecting plate 20, so that the product is positioned and fixed by the first positioning block 30 and the first tensioning block 40. At the same time, the first elastic member 50 will also push / pull the first tensioning block 40 and the movable connecting plate 20 to rotate relative to each other, so that the first tensioning block 40 moves back to the front end of the first arc area.

[0037] Therefore, compared with the traditional clamping method, the clamping fixture provided in the present application only requires the operator to rotate the movable connecting plate 20 to sleeve the product on the outside of the first positioning block 30 and the first elastic block, and then the operator loosens the movable connecting plate 20, so that the first positioning block 30 and the first elastic block can be respectively pressed against the product under the elastic force of the first elastic member 50, automatically positioning and fixing the product, and quickly completing the clamping process.

[0038] Specifically, the first elastic member 50 may be a spring, a spring sheet, an elastic pull rope, etc., to provide elastic force to move the first elastic block along the first direction. One end of the first elastic member 50 may be directly or indirectly connected to the bottom plate 10, and supported by the bottom plate 10 to apply elastic pulling force or elastic pushing force to the first tensioning member at the other end of the first elastic member 50.

[0039] In some embodiments, a knob 60 is disposed on the movable connecting plate 20 , and the knob 60 is connected to the rotation center of the movable connecting plate 20 .

[0040] The function of the knob 60 is to facilitate the operator to rotate the movable connecting plate 20. In addition, the head of the knob 60 can be set to a polygon, and the corners are transitioned in an arc shape to facilitate the operator to hold the knob 60.

[0041] In some embodiments, see Figure 2 The clamping fixture also includes a first connecting member 70 , a first sliding groove 21 is opened on the movable connecting plate 20 , the range of the first sliding groove 21 coincides with the first arc-shaped area, and the first connecting member 70 passes through the first sliding groove 21 and is connected to the first tensioning block 40 .

[0042] The first connecting member 70 can slide in the first slide groove 21 to achieve the sliding connection between the movable connecting plate 20 and the first tensioning block 40 along the first arc-shaped area. The first connecting member 70 can be a screw, the bottom end of which passes through the first slide groove 21 and is threadedly connected to the first tensioning block 40, and the head of the screw is exposed outside the first slide groove 21 and is close to the movable connecting plate 20 to limit the movable connecting plate 20 and maintain the sliding connection relationship between the movable connecting plate 20 and the first tensioning block 40.

[0043] In addition, the clamping fixture also includes a first mounting block 80, which is arranged on the base plate 10. A cavity is formed inside the first mounting block 80, and a first opening 81 and a second opening 82 are provided to connect the cavity. The first tensioning block 40 is slidably arranged in the first mounting block 80 along the first direction, and is exposed to the first mounting block 80 through the first opening 81. The first connecting member 70 passes through the first sliding groove 21 and the second opening 82 in sequence and is connected to the first tensioning block 40. The first connecting member 70 can slide in the second opening 82 along the first direction.

[0044] The function of the first mounting block 80 is to mount the first tensioning block 40, and the first tensioning block 40 slides inside the first mounting block 80 to achieve relative sliding of the first tensioning block 40 and the bottom plate 10 along the first direction. The first opening 81 is opened on the side of the first mounting block 80, and the first tensioning block 40 can be limited by the first mounting block 80 on both sides to ensure movement along the first direction and be exposed to the first mounting block 80 through the first opening 81. The second opening 82 is opened on the top surface of the mounting block to facilitate the first connecting member 70 to pass through and connect to the first tensioning block 40, and the second opening 82 is set to a certain length along the first direction to ensure that the first connecting member 70 can slide in the second opening 82 along the first direction.

[0045] Furthermore, the first tensioning block 40 may include a first tensioning portion 41 and a first limiting portion 42, the first limiting portion 42 is connected to the side of the first tensioning portion 41, the first elastic member 50 is selected as a spring, one end of the first elastic member 50 is sleeved on the first tensioning portion 41 and abuts against the first limiting portion 42, and the other end abuts against the inner wall of the first mounting block 80.

[0046] The first limiting portion 42 can divide the first tensioning portion 41 into two parts, one part is used for tensioning the product, and the other part is used for installing the spring. In addition, the first limiting portion 42 can be closely attached to one side wall of the cavity of the first mounting block 80, and the first tensioning portion 41 can be closely attached to the other side wall of the cavity of the first mounting block 80, and the movement of the first tensioning block 40 is guided by the two side walls to ensure movement along the first direction.

[0047] One end of the first elastic member 50 is sleeved on the first tensioning portion 41 to prevent the elastic force direction of the spring from being offset. When the operator rotates the movable connecting plate 20 to drive the first tensioning block 40 to approach the first mounting block 80, the spring is continuously compressed by the first limiting portion 42; when the operator lets go, the spring will push the first limiting portion 42 to move, so that the first tensioning portion 41 moves out of the first mounting block 80 through the first opening 81 to tension the product to be positioned.

[0048] Furthermore, the first limiting portion 42 is clamped in the first opening 81. That is, the width of the first opening 81 is greater than the sum of the widths of the first tensioning portion 41 and the first limiting portion 42, so that the first limiting portion 42 cannot pass through the first opening 81, ensuring that the first limiting portion 42 is always inside the first fixing block and preventing the first elastic member 50 from falling off.

[0049] Alternatively, the number of the first limiting portions 42 can also be set to two, which are respectively located on both sides of the first tensioning portion 41. The first tensioning portion 41 abuts against the two side walls of the cavity of the first positioning block 30 through the first limiting portions 42 on both sides to ensure movement along the first direction, and the first elastic member 50 abuts against the two first limiting portions 42 at the same time.

[0050] In some embodiments, the second direction is also defined to be parallel to the surface of the base plate, and the first direction forms an angle with the second direction. The clamping fixture further includes a second positioning block 90, a second tensioning block 100, and a second elastic member 110. The second positioning block 90 is disposed on the base plate 10, and the second tensioning block 100 is slidably disposed on the base plate 10 along the second direction. A second arc-shaped area is preset on the movable connecting plate 20, and the second tensioning block 100 can be slidably connected to the movable connecting plate 20 along the second arc-shaped area.

[0051] Furthermore, the distance between the front end of the second arc-shaped area and the rotation center of the movable connecting plate 20 is greater than the distance between the rear end of the second arc-shaped area and the rotation center of the movable connecting plate 20. The second elastic member 110 is disposed between the base plate 10 and the first tensioning block. The second elastic member 110 can push / pull the second tensioning block 100 to move along the second direction and away from the second positioning block 90, while moving the second tensioning block 100 from the rear end of the second arc-shaped area to the front end of the second arc-shaped area.

[0052] See also Figure 4 By rotating the movable connecting plate 20, the operator can drive the first tensioning block 40 to move toward the rear end of the first arc-shaped area, so that the first tensioning block 40 is close to the rotation center of the movable connecting plate 20, and at the same time, the first tensioning block 40 moves along the first direction and approaches the first positioning block 30, thereby reducing the distance between the first tensioning block 40 and the first positioning block 30, making it easier to put the product on the outside of the first tensioning block 40 and the first positioning block 30.

[0053] At the same time, the movable connecting plate 20 will also drive the second tensioning block 100 to move toward the rear end of the second arc-shaped area, so that the second tensioning block 100 is close to the rotation center of the movable connecting plate 20, and at the same time, the second tensioning block 100 moves along the second direction and approaches the second positioning block 90, thereby reducing the distance between the second tensioning block 100 and the second positioning block 90, making it easier to put the product on the outside of the second tensioning block 100 and the second positioning block 90.

[0054] During this process, the first elastic member 50 and the second elastic member 1100 are both stretched or compressed to store elastic potential energy.

[0055] See also Figure 5 After the driving force on the movable connecting plate 20 is released, the first elastic member 50 can push / pull the first tensioning block 40 to move along the first direction to move away from the rotation center of the first positioning block 30 and the movable connecting plate 20, so that the product is positioned and fixed by the first positioning block 30 and the first tensioning block 40. At the same time, the first elastic member 50 will also push / pull the first tensioning block 40 and the movable connecting plate 20 to rotate relative to each other, so that the first tensioning block 40 moves back to the front end of the first arc-shaped area;

[0056] At the same time, the second elastic member 110 can push / pull the second tensioning block 100 to move along the second direction to move away from the rotation center of the second positioning block 90 and the movable connecting plate 20, so that the product is positioned and fixed by the second positioning block 90 and the second tensioning block 100. At the same time, the second elastic member 110 will also push / pull the second tensioning block 100 and the movable connecting plate 20 to rotate relative to each other, so that the second tensioning block 100 moves back to the front end of the second arc area.

[0057] Therefore, the operator can simultaneously sleeve the product on the first tensioning block 40, the first positioning block 30, the second tensioning block 100 and the second positioning block 90 by rotating the movable connecting plate 20, and quickly realize the positioning of the product in both the first direction and the second direction.

[0058] In some embodiments, the second direction is perpendicular to the first direction. At this time, the first tensioning block 40, the first positioning block 30, the second tensioning block 100 and the second positioning block 90 can simultaneously position the short side and the long side of products such as mobile phone frames and tablet frames, effectively improving the positioning efficiency.

[0059] In some embodiments, the second tension block 100 may adopt a mounting connection structure that is the same as or similar to that of the first tension block 40 .

[0060] The clamping fixture may further include a second connecting member 120 . A second sliding groove 22 is provided on the movable connecting plate 20 . The second sliding groove 22 coincides with the second arc-shaped area. The second connecting member 120 passes through the second sliding groove 22 and is connected to the second tensioning block 100 .

[0061] The second connecting member 120 can slide in the second slide groove 22 to achieve the sliding connection between the movable connecting plate 20 and the second tensioning block 100 along the second arc-shaped area. Specifically, the second connecting member 120 can also be a screw, the end of the screw passes through the second slide groove 22 and is threadedly connected to the second tensioning block 100, the head of the screw is exposed outside the second slide groove 22 and is close to the movable connecting plate 20 to limit the movable connecting plate 20 and maintain the sliding connection relationship between the movable connecting plate 20 and the second tensioning block 100.

[0062] In addition, the clamping fixture also includes a second mounting block 130, which is arranged on the base plate 10. A cavity is formed inside the second mounting block 130, and a third opening and a fourth opening connecting the cavity are provided. The second tensioning block 100 is slidably arranged in the second mounting block 130 along the second direction, and is exposed to the second mounting block 130 through the third opening. The second connecting member 120 passes through the second slide groove 22 and the fourth opening in sequence and is connected to the second tensioning block 100. The second connecting member 120 can slide in the fourth opening along the second direction.

[0063] The function of the second mounting block 130 is to mount the second tensioning block 100, and by sliding the second tensioning block 100 inside the second mounting block 130, the second tensioning block 100 and the bottom plate 10 can slide relative to each other along the second direction. The third opening is opened on the side of the second mounting block 130, and the two sides of the second tensioning block 100 can be limited by the second mounting block 130 to ensure movement along the second direction and exposure to the second mounting block 130 through the third opening. The fourth opening is opened on the top surface of the mounting block to facilitate the second connecting member 120 to pass through and connect to the second tensioning block 100, and the fourth opening is set to a certain length along the second direction to ensure that the second connecting member 120 can slide along the second direction in the fourth opening.

[0064] Furthermore, the second tensioning block 100 may also include a second tensioning portion and a second limiting portion, the second limiting portion is connected to the side of the second tensioning portion, the second elastic member 110 may also be selected as a spring, one end of the second elastic member 110 is sleeved on the second tensioning portion and abuts against the second limiting portion, and the other end abuts against the inner wall of the second mounting block 130.

[0065] The second limiting part can divide the second tensioning part into two parts, one part is used for tensioning the product, and the other part is used for installing the spring. In addition, the second limiting part can be closely attached to one side wall of the cavity of the second mounting block 130, and the second tensioning part can be closely attached to the other side wall of the cavity of the second mounting block 130. The movement of the second tensioning block 100 is guided by the two side walls to ensure movement along the second direction.

[0066] One end of the second elastic member 110 is sleeved on the second tensioning part to prevent the elastic force direction of the spring from being offset. When the operator rotates the movable connecting plate 20 to drive the second tensioning block 100 to approach the second mounting block 130, the spring is continuously compressed by the second limiting part; when the operator lets go, the spring will push the second limiting part to move, so that the second tensioning part moves out of the second mounting block 130 through the third opening to tension the product to be positioned.

[0067] Furthermore, the second limiting portion is clamped in the third opening, that is, the width of the third opening is greater than the sum of the widths of the second tensioning portion and the second limiting portion, so that the second limiting portion cannot pass through the third opening, ensuring that the second limiting portion is always inside the second fixing block and preventing the second elastic member 110 from falling off.

[0068] Alternatively, the number of second limiting portions can also be set to two, respectively located on both sides of the second tensioning portion, and the second tensioning portion abuts against the two side walls of the cavity of the second positioning block 90 through the second limiting portions on both sides to ensure movement along the second direction, and the second elastic member 110 is simultaneously abutted against the two second limiting portions.

[0069] In some embodiments, the movable connecting plate 20 can be rotatably disposed on the bottom plate 10 via a rotating shaft. Alternatively, the movable connecting plate 20 can also maintain the rotational connection relationship between the movable connecting plate 20 and the bottom plate 10 under the joint action of the first connecting member 70 and the second connecting member 120.

[0070] In some embodiments, the length of the first arc-shaped region is greater than the length of the second arc-shaped region.

[0071] When the movable connecting plate 20 rotates through the same angle, the distance moved by the first tensioning block 40 along the first direction will be greater than the distance moved by the second tensioning block 100 along the second direction, so that the first tensioning block corresponding to the long side of the product moves a greater distance than the second tensioning block corresponding to the short side of the product, so as to adapt to the situation where the product is positioned at different distances in two directions, thereby achieving a better positioning effect.

[0072] See also Figure 6 The present application also provides a positioning mechanism, including a driving platform 3 and the above-mentioned clamping fixture 1, and the clamping fixture 1 is arranged at the driving end of the driving platform 3.

[0073] The driving platform 3 can be a two-axis motion platform, a three-axis motion platform or a four-axis motion platform, etc. For example, the driving platform 3 can include three linear drive modules arranged in sequence, and the driving directions are perpendicular to each other. After the clamping fixture 1 clamps the product 2, the driving platform 3 can drive the clamping fixture 1 and the product 2 to move in three-dimensional directions, so that the product 2 moves to the required processing position.

[0074] Furthermore, the driving platform 3 may also include a rotation driving module to drive the clamping fixture 1 and the product 2 to rotate, so as to adjust the processing angle of the product 2.

[0075] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and application concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims

1. A clamping fixture, characterized in that: include: Base plate; A first positioning block, disposed on the bottom plate; A first tensioning block is slidably disposed on the bottom plate along a first direction; A movable connecting plate is rotatably arranged on the bottom plate, the movable connecting plate is provided with a first arc-shaped area, the first tensioning block is slidably connected to the movable connecting plate along the first arc-shaped area, and the distance between the front end of the first arc-shaped area and the rotation center of the movable connecting plate is greater than the distance between the rear end of the first arc-shaped area and the rotation center of the movable connecting plate; and A first elastic member is arranged between the base plate and the first tensioning block. The first elastic member can push / pull the first tensioning block to move along a first direction and away from the rotation center of the first positioning block and the movable connecting plate, and at the same time move the first tensioning block from the rear end of the first arc-shaped area to the front end of the first arc-shaped area.

2. The clamping fixture according to claim 1, characterized in that: It also includes a first connecting member, a first sliding groove is provided on the movable connecting plate, the first sliding groove overlaps with the first arc-shaped area, and the first connecting member passes through the first sliding groove and is connected to the first tensioning block.

3. The clamping fixture according to claim 2, characterized in that: It also includes a first mounting block, which is arranged on the base plate, a cavity is formed inside the first mounting block, and a first opening and a second opening are provided to connect the cavity, the first tensioning block is slidably arranged in the first mounting block along a first direction, and is exposed to the first mounting block through the first opening, the first connecting member passes through the first sliding groove and the second opening in sequence and is connected to the first tensioning block, and the first connecting member can slide in the second opening along the first direction.

4. The clamping fixture according to claim 3, characterized in that: The first tensioning block includes a first tensioning portion and a first limiting portion, the first limiting portion is connected to the side of the first tensioning portion and is clamped in the first opening, the first elastic member is a spring, one end of which is sleeved on the first tensioning portion and abuts against the first limiting portion, and the other end abuts against the inner wall of the first mounting block.

5. The clamping fixture according to any one of claims 1 to 4, characterized in that: The second elastic member is arranged between the bottom plate and the first tensioning block, and the second elastic member can push / pull the second tensioning block to move along the second direction and away from the second positioning block and the rotation center of the movable connecting plate, and at the same time, the second tensioning block moves from the rear end of the second arc zone to the front end of the second arc zone.

6. The clamping fixture according to claim 5, characterized in that: The first direction is perpendicular to the second direction.

7. The clamping fixture according to claim 5, characterized in that: The length of the first arc-shaped area is greater than the length of the second arc-shaped area.

8. The clamping fixture according to claim 5, characterized in that: The second locking member is configured to lock the locking member against the locking cam of the locking cam, wherein the locking cam is configured to lock the locking cam of the locking cam.

9. The clamping fixture according to claim 1, characterized in that: It also includes a knob connected to the rotation center of the movable connecting plate.

10. A positioning mechanism, characterized in that: It comprises a driving platform and a clamping fixture as described in any one of claims 1 to 9, wherein the clamping fixture is arranged at the driving end of the driving platform.

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