A clamping jig

Abstract

The present application relates to a kind of clamping fixtures, including base, first and second clamping components;Base is provided with first and second channel;First clamping component includes relatively movable rear clamping piece and front clamping piece, and front clamping piece and base are connected by first elastic member;Second clamping component includes relatively movable left clamping piece and right clamping piece;Front clamping piece and first follow-up plate are connected, and first follow-up plate can slide in first channel along first direction;Right clamping piece and second follow-up plate are connected, and second follow-up plate can slide in second channel along second direction;First follow-up plate is provided with driving protrusion, and second follow-up plate is provided with driving recess;When driving member drives second follow-up plate to move along second direction, driving protrusion enters / leaves driving recess, and drives front clamping piece to move along first direction relative to rear clamping piece.The present application is simple in structure, easy to operate, and improves clamping efficiency.

Description

Technical Field

[0001] This invention relates to the field of fixture technology, and in particular to a clamping fixture. Background Technology

[0002] When machining and assembling workpieces, clamping fixtures are generally used to hold and position them to ensure the correct position and accuracy of subsequent machining and assembly. Traditional clamping fixtures typically have multiple cylinders, each driving a clamping component positioned around the workpiece. Multiple cylinders are used to move the clamping components to hold the workpiece. However, this type of fixture requires the simultaneous operation of multiple cylinders for clamping and positioning, resulting in a complex structure, inconvenient operation, reduced clamping efficiency, and inability to meet usage requirements. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing technology, such as complex fixture structure and inconvenient operation, which result in low clamping efficiency.

[0004] To solve the above-mentioned technical problems, the present invention provides a clamping fixture having a first direction and a second direction that are perpendicular to each other, comprising,

[0005] A base having a first channel and a second channel, wherein the axis of the first channel is parallel to the first direction and the axis of the second channel is parallel to the second direction;

[0006] A first clamping assembly includes a rear clamping member and a front clamping member that are movable relative to each other on the base in a first direction, and the front clamping member and the base are connected by a first elastic member.

[0007] The second clamping assembly includes a left clamping member and a right clamping member that are movable relative to each other on the base in a second direction;

[0008] The front clamping member is connected to the first follower plate, which is connected in the first channel and can slide in the first channel along the first direction;

[0009] The right-side clamping member is connected to the second follower plate, which is connected in the second channel and can slide in the second channel along the second direction. The second follower plate is driven by the driving member to move along the second direction.

[0010] The first follower plate has a driving protrusion at its lower part and a driving recess on its side. When the driving member drives the second follower plate to move along the second direction, the driving protrusion enters / disengages from the driving recess, causing the front clamping member to move relative to the rear clamping member along the first direction.

[0011] In one embodiment of the present invention, the driving recess is trapezoidal or arc-shaped, and the shape of the driving protrusion is adapted to the shape of the driving recess.

[0012] In one embodiment of the present invention, the trapezoid is a right trapezoid or an isosceles trapezoid.

[0013] In one embodiment of the present invention, a V-groove is provided on the upper part of the first follower plate, the opening of the V-groove facing the second direction, and a positioning pin is connected to the upper part of the second follower plate, the positioning pin being located in the V-groove and movable in the V-groove.

[0014] In one embodiment of the present invention, the first follower plate includes a main body, the upper part of the main body extends toward the rear clamping member to form an extension plate, the extension plate is provided with the V-groove, the extension plate overlaps the second follower plate, and the main body is provided with the driving protrusion on the side facing the second follower plate.

[0015] In one embodiment of the present invention, the right-side clamping member and the second follower plate are connected by a movable seat. A connecting plate is formed on the movable seat, and a positioning groove is provided on the connecting plate. A first pin is slidably connected in the positioning groove. A hinge support is formed on the second follower plate. The connecting plate is hinged to the hinge support through the first pin. A second elastic member is provided between the hinge support and the movable seat.

[0016] In one embodiment of the present invention, the movable base is provided with a second slot, and the right-side clamp is inserted into the second slot.

[0017] In one embodiment of the present invention, the clamping fixture further includes an end seat, the lower part of which is connected to a second adjusting screw via a thread, the axis of which is parallel to the second direction, and the second adjusting screw is used to abut against the base. The upper part of the end seat has a snap-fit ​​plate, and the movable seat is provided with a third slot, in which the snap-fit ​​plate is inserted.

[0018] In one embodiment of the present invention, a first slot is provided on the first follower plate, and the front clamping member is inserted into the first slot.

[0019] In one embodiment of the present invention, the base includes a base plate and a cover, the cover being connected to the base plate, the first channel and the second channel being located on the cover, the cover being provided with a first sliding groove and a second sliding groove, the top end of the front clamping member extending out of the first sliding groove and being movable in the first sliding groove along a first direction, and the top end of the right clamping member extending out of the second sliding groove and being movable in the second sliding groove along a second direction.

[0020] In one embodiment of the present invention, one end of the rear clamping member is fixed to the base plate, and the other end extends out of the cover body, with the edge of the cover body protruding upward to form the left clamping member.

[0021] In one embodiment of the present invention, the rear clamping member is connected to a first adjusting screw via a thread, the axis of the first adjusting screw being parallel to the first direction, and the first adjusting screw being used to abut against the first follower plate.

[0022] In one embodiment of the present invention, the length of the top end of the front clamping member along the second direction is greater than the length of the bottom end; the length of the top end of the right clamping member along the first direction is greater than the length of the bottom end.

[0023] In one embodiment of the present invention, a T-slot is provided on the second follower plate, a T-plate is inserted into the T-slot, and the T-plate is connected to the driving end of the driving member.

[0024] The technical solution of the present invention has the following advantages compared with the prior art:

[0025] The clamping fixture described in this invention can control the clamping action of clamping components in different directions (left and right, front and back) using a single driving component. It has a simple structure, is easy to operate, and greatly improves clamping efficiency while ensuring clamping reliability, saving processing time and making it more suitable for promotion and application. Attached Figure Description

[0026] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the clamping fixture of the present invention;

[0028] Figure 2 yes Figure 1 Top view of the structure shown;

[0029] Figure 3 yes Figure 2 Sectional view at point AA;

[0030] Figure 4 yes Figure 2 Sectional view at point BB;

[0031] Figure 5 This is a front view (clamped state) of the clamping fixture of the present invention;

[0032] Figure 6 yes Figure 5 Sectional view at CC;

[0033] Figure 7 yes Figure 5 Sectional view at point DD;

[0034] Figure 8 This is a front view (released state) of the clamping fixture of the present invention;

[0035] Figure 9 yes Figure 8 Sectional view at EE;

[0036] Figure 10 yes Figure 8 Sectional view at FF;

[0037] Figure 11 yes Figure 1 Exploded view of the clamping fixture shown;

[0038] Figure 12 yes Figure 1 A schematic diagram of the clamping fixture after the cover is removed;

[0039] Figure 13 yes Figure 12 Top view of the structure shown;

[0040] Figure 14 This is an assembly diagram of the first follower plate and the second follower plate in this invention;

[0041] Figure 15 yes Figure 14 Top view of the structure shown;

[0042] Figure 16 yes Figure 14 A bottom view of the structure shown;

[0043] Figure 17 This is a structural schematic diagram of the second follower plate at one angle in this invention;

[0044] Figure 18 This is a structural schematic diagram of the second follower plate from another angle in this invention;

[0045] Figure 19 This is a schematic diagram of the structure of the first follower plate in this invention;

[0046] Figure 20 yes Figure 19 Right view of the first follower plate;

[0047] Figure 21 yes Figure 19 Left view of the first follower plate;

[0048] Figure 22 This is a structural schematic diagram of the first follower plate at one angle in this invention;

[0049] Figure 23 This is a structural schematic diagram of the first follower plate from another angle in this invention;

[0050] Explanation of reference numerals in the instruction manual:

[0051] 10. Base; 101. Base plate; 102. Cover; 1021. First channel; 1022. Second channel; 1023. First sliding groove; 1024. Second sliding groove; 103. Fixing plate;

[0052] 20. Rear clamping component;

[0053] 30. Front clamping component;

[0054] 40. Left-side clamping component;

[0055] 50. Right-side clamping component;

[0056] 60. Driving components; 601. T-shaped plate;

[0057] 70. First follower board; 701. Drive protrusion; 702. V-groove; 703. Main board body; 704. Extension board; 705. First slot;

[0058] 80. Second follower plate; 801. Drive recess; 802. Positioning pin; 803. Overlapping surface; 804. Hinge support; 805. T-slot;

[0059] 90. First elastic element;

[0060] 100. Second elastic element;

[0061] 110. Movable base; 1101. Connecting plate; 11011. Positioning groove; 1102. First pin; 1103. Second slot; 1104. Third slot;

[0062] 120. End seat; 1201. Snap-fit ​​plate;

[0063] 130. First adjusting screw;

[0064] 140. Second adjusting screw. Detailed Implementation

[0065] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present disclosure or its application or use.

[0066] In the description of this invention, it should be understood that the terms "vertical," "upper," "lower," "top," "side," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0067] 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] The following will combine Figures 1-23 The structure of this embodiment will be further described below.

[0069] Example

[0070] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 11 As shown, this embodiment discloses a clamping fixture having a first direction and a second direction that are perpendicular to each other. Here, the first direction is the front-back direction and the second direction is the left-right direction.

[0071] The aforementioned clamping fixture includes a base 10, a first clamping assembly, and a second clamping assembly;

[0072] The base 10 is provided with a first channel 1021 and a second channel 1022. The axis of the first channel 1021 is parallel to the first direction, and the axis of the second channel 1022 is parallel to the second direction.

[0073] The first clamping assembly includes a rear clamping member 20 and a front clamping member 30 that can move relative to each other on the base 10 in a first direction. The front clamping member 30 and the base 10 are connected by a first elastic member 90 so as to realize the clamping and resetting of the front clamping member 30 by means of the first elastic member 90.

[0074] The second clamping assembly includes a left clamping member 40 and a right clamping member 50 that are movable relative to each other in a second direction on the base 10;

[0075] The front clamping member 30 is connected to the first follower plate 70, which is connected in the first channel 1021 and can slide in the first channel 1021 along the first direction.

[0076] The first channel 1021 is used to restrict the left and right movement of the first follower plate 70, so that the first follower plate 70 can only move along the first direction (front and back) and cannot move along the second direction (left and right).

[0077] The right clamping member 50 is connected to the second follower plate 80. The second follower plate 80 is connected in the second channel 1022 and can slide in the second channel 1022 along the second direction. The second follower plate 80 is driven by the driving member 60 to move along the second direction. The second channel 1022 enables the second follower plate 80 to move more accurately in the second direction and avoids it from deviating.

[0078] The first follower plate 70 has a driving protrusion 701 at its lower part, and the second follower plate 80 has a driving recess 801 on its side. When the driving member 60 drives the second follower plate 80 to move along the second direction, the driving protrusion 701 enters / disengages from the driving recess 801, thereby driving the front clamping member 30 to move relative to the rear clamping member 20 along the first direction.

[0079] When the above structure is in operation:

[0080] The second follower plate 80 is pushed to move to the right in the second channel 1022 along the second direction by the drive member 60. At this time, the right clamping member 50 moves to the right along with it, and the right clamping member 50 gradually moves away from the left clamping member 40. At the same time, the drive recess 801 on the second follower plate 80 abuts against the drive protrusion 701 on the first follower plate 70, causing the first follower plate 70 to move outward along the front side in the first direction, so that the front clamping member 30 gradually moves away from the rear clamping member 20. At this time, the entire clamping fixture is in a gradually opening state. When the drive recess 801 moves to the point where it is completely disengaged from the drive protrusion 701, the fixture reaches the fully open state (see reference). Figures 8-10 At this time, the first elastic element 90 is also in a compressed state;

[0081] Conversely, the driving member 60 pushes the second follower plate 80 to move leftward in the second channel 1022 along the second direction. At this time, the right clamping member 50 moves leftward along with it, gradually approaching the left clamping member 40. Simultaneously, the driving recess 801 on the second follower plate 80 gradually moves leftward and retracts. Under the elastic force of the first elastic member 90, the driving protrusion 701 on the first follower plate 70 gradually retracts into the driving recess 801, causing the first follower plate 70 to move rearward along the first direction. This causes the front clamping member 30 to gradually approach the rear clamping member 20. At this time, the entire clamping fixture is in a gradually clamping state. When the driving protrusion 701 is completely inserted into the driving recess 801, the fixture reaches the ultimate clamping state (see...). Figures 5-7 ).

[0082] The above structure can control the clamping action of the clamping parts in different directions (left and right, front and back) using a single drive unit 60. The structure is simple and easy to operate. While ensuring the reliability of clamping, it also greatly improves the clamping efficiency, saves processing time, and is more conducive to promotion and application.

[0083] The drive component 60 can be a cylinder, a hydraulic cylinder, or an electric push rod, etc.

[0084] Furthermore, a fixing plate 103 is connected to the base 10, and the end of the first follower plate 70 away from the rear clamping member 20 is connected to the fixing plate 103 through the first elastic member 90.

[0085] In some embodiments, the driving recess 801 may be arc-shaped, and the shape of the driving protrusion 701 is adapted to the shape of the driving recess 801 and is also arc-shaped.

[0086] In other embodiments, such as Figures 11-13 As shown, the driving recess 801 is trapezoidal, and the shape of the driving protrusion 701 is adapted to the shape of the driving recess 801, and is also trapezoidal.

[0087] Furthermore, the trapezoid is a right-angled trapezoid or an isosceles trapezoid. Preferably, the driving protrusion 701 is an isosceles trapezoid, which makes it easier for the driving protrusion 701 to smoothly enter / disengage from the driving recess 801.

[0088] like Figure 7 As shown, the inclination angle of the inclined surface on the trapezoidal driving protrusion 701 is θ, then 90° < θ < 180°;

[0089] Preferably, 120° < θ < 135° to better ensure clamping effect.

[0090] In some implementations, such as Figures 15-16 , Figures 19-23 As shown, the upper part of the first follower plate 70 is provided with a V-groove 702, the opening of the V-groove 702 faces the second direction, and the upper part of the second follower plate 80 is fixed with a positioning pin 802, which is located in the V-groove 702 and can move in the V-groove 702.

[0091] The cooperation between the aforementioned locating pin 802 and V-groove 702 can further ensure the clamping and resetting of the front clamping member 30; such as Figures 14-16 As shown, when the driving member 60 pushes the second follower plate 80 to move to the left along the second direction, the right clamping member 50 gradually approaches the left clamping member 40. At the same time, the driving recess 801 on the second follower plate 80 gradually moves to the left and back, and the positioning pin 802 also moves to the left. The positioning pin 802 contacts the side wall of the V-groove 702 and gradually drives the first follower plate 70 to move to the rear along the first direction, so that the driving protrusion 701 on the first follower plate 70 gradually retracts into the driving recess 801, so that the front clamping member 30 gradually approaches the rear clamping member 20. At the same time, the first elastic member 90 also pushes the first follower plate 70 to move to the rear. When the driving protrusion 701 completely enters the driving recess 801, the fixture reaches the limit clamping state.

[0092] Furthermore, such as Figures 19-23 As shown, the first follower plate 70 includes a main body 703. The upper part of the main body 703 extends toward the rear clamping member 20 to form an extension plate 704. A V-groove 702 is provided on the extension plate 704. The extension plate 704 overlaps the second follower plate 80. A drive protrusion 701 is provided on the side of the main body 703 facing the second follower plate 80.

[0093] Preferred, such as Figures 17-18 As shown, the overlapping surface 803 of the second follower plate 80 and the extension plate 704 is lower than the top surface of the second follower plate 80, so as to make the overall structure more compact and improve space utilization.

[0094] In some embodiments, such as Figures 11-13 As shown, the right-side clamping member 50 and the second follower plate 80 are connected by a movable seat 110. A connecting plate 1101 is formed on the movable seat 110, and a positioning groove 11011 is provided on the connecting plate 1101. A first pin 1102 is slidably connected in the positioning groove 11011. A hinge support 804 is formed on the second follower plate 80. The connecting plate 1101 is hinged to the hinge support 804 through the first pin 1102. A second elastic member 100 is provided between the hinge support 804 and the movable seat 110.

[0095] In the above structure, the first pin 1102 can move in the positioning groove 11011, allowing the gap between the moving seat 110 and the second follower plate 80 to be adaptively adjusted under the action of the second elastic element 100, thereby buffering and eliminating the gap. Especially for ultra-thin workpieces, the second elastic element 100 provides a certain buffering effect when the left and right clamping members hold the workpiece, avoiding large rigid impacts and preventing damage and deformation to the workpiece caused by rigid clamping, thus better protecting the workpiece.

[0096] Furthermore, a second elastic element 100 is provided on both sides of the connecting plate 1101 to better ensure motion stability.

[0097] Similarly, the first elastic element 90, in addition to its function of resetting and clamping, also serves to buffer and eliminate gaps. Especially for ultra-thin workpieces, the first elastic element 90 provides a certain buffering effect when the front and rear clamping parts hold the workpiece, avoiding large rigid impacts and preventing damage and deformation caused by rigid clamping, thus better protecting the workpiece.

[0098] In some embodiments, the movable base 110 is provided with a second slot 1103, and the right-side clamping member 50 is inserted into the second slot 1103 to improve the convenience of processing and installation, and also to facilitate disassembly.

[0099] In some embodiments, the clamping fixture further includes an end seat 120, the lower part of which is connected to a second adjusting screw 140 via a thread. The axis of the second adjusting screw 140 is parallel to a second direction. Figure 4 As shown, the second adjusting screw 140 is used to abut against the base 10, the upper part of the end seat 120 has a snap-fit ​​plate 1201, the movable seat 110 is provided with a third slot 1104, the snap-fit ​​plate 1201 is inserted into the third slot 1104 so that the end seat 120 can move together with the movable seat 110.

[0100] The position of the second follower plate 80 can be fine-tuned by setting the second adjusting screw 140. For example, one end of the adjusting screw abuts against the cover 102 of the base 10. When the second adjusting screw 140 is turned, the end seat 120 will move on the second screw, thereby driving the second follower plate 80 and the right clamping member 50 to move together to achieve fine-tuning of the position, thereby changing the minimum clamping distance between the right clamping member 50 and the left clamping member 40. It can be understood that the adjustment action of the second adjusting screw 140 is generally performed before the clamping operation.

[0101] In some embodiments, a first slot 705 is provided on the first follower plate 70, and the front clamping member 30 is inserted into the first slot 705 to improve the convenience of processing and installation, and also to facilitate disassembly.

[0102] In some embodiments, such as Figure 1 and Figure 11 As shown, the base 10 includes a base plate 101 and a cover 102. The cover 102 is connected to the base plate 101. The first channel 1021 and the second channel 1022 are both provided on the cover 102. The cover 102 is provided with a first sliding groove 1023 and a second sliding groove 1024. The top end of the front clamping member 30 extends out of the first sliding groove 1023 and can move in the first sliding groove 1023 along a first direction. The top end of the right clamping member 50 extends out of the second sliding groove 1024 and can move in the second sliding groove 1024 along a second direction.

[0103] Understandably, in the first direction, the width of the first sliding groove 1023 is greater than the width of the top end of the front clamping member 30. For example, the width of the first sliding groove 1023 in the first direction is 3.5 mm larger than the width of the top end of the front clamping member 30, and the width of the first sliding groove 1023 in the first direction is less than 8 mm.

[0104] In the second direction, the width of the second sliding groove 1024 is greater than the width of the top end of the right clamping member 50. For example, the width of the second sliding groove 1024 in the second direction is 3.5 mm larger than the width of the top end of the right clamping member 50, and the width of the second sliding groove 1024 in the second direction is less than 8 mm. The specific dimensions can be adjusted according to actual needs, and are not specifically limited here.

[0105] The first sliding groove 1023 and the second sliding groove 1024 mentioned above can respectively limit the movement stroke of the front clamping member 30 and the right clamping member 50, thereby better ensuring the clamping effect.

[0106] Furthermore, one end of the rear clamping member 20 is fixed to the base plate 101, and the other end extends out of the cover 102, with the edge of the cover 102 protruding upward to form the left clamping member 40.

[0107] Furthermore, the rear clamping member 20 is connected to the first adjusting screw 130 via a thread, the axis of the first adjusting screw 130 being parallel to the first direction, such as... Figure 3 and Figure 9 As shown, the first adjusting screw 130 abuts against the first follower plate 70 to fine-tune the position of the front clamping member 30, thereby changing the minimum clamping distance between the front clamping member 30 and the rear clamping member 20. It is understood that the adjustment of the first adjusting screw 130 is generally performed before the clamping operation.

[0108] In some embodiments, the length of the top end of the front clamping member 30 along the second direction is greater than the length of the bottom end; the length of the top end of the right clamping member 50 along the first direction is greater than the length of the bottom end.

[0109] Specifically, the length of one end of the front clamping member 30 extending out of the first sliding groove 1023 along the second direction is greater than the length of the other end; the length of one end of the right clamping member 50 extending out of the second sliding groove 1024 along the first direction is greater than the length of the other end; since the top of the front clamping member 30 and the top of the right clamping member 50 are clamping parts, the above arrangement can increase the clamping area between the clamping member and the clamped workpiece, thereby improving the clamping reliability and stability.

[0110] In some embodiments, a T-slot 805 is provided on the second follower plate 80, and a T-plate 601 is inserted into the T-slot 805. The T-plate 601 is connected to the driving end of the driving member 60. The connection between the second follower plate 80 and the driving member 60 is realized in this way, which facilitates disassembly and can also ensure the stability of the connection.

[0111] The drive component 60 includes a telescopic push rod, which is connected to the T-shaped plate 601 and the T-shaped groove 805. The drive component 60 can be a linear drive component such as a cylinder, hydraulic cylinder or electric push rod.

[0112] In this embodiment, the first elastic element 90 and the second elastic element 100 can both be springs, rubber, or deformable metal sheets, etc., which are elements that can undergo elastic deformation.

[0113] The fixture in this embodiment can be used to clamp L-shaped workpieces, rectangular workpieces, or other shaped workpieces.

[0114] The clamping fixture described above can control the clamping action of clamping components in different directions using a single driving component. It has a simple structure and is easy to operate. While ensuring clamping reliability, it also greatly improves clamping efficiency. At the same time, through the setting of relevant elastic components, it can also protect the workpiece to the greatest extent and prevent the workpiece from deforming during clamping.

[0115] All the above-mentioned optional technical solutions can be combined in any way to form optional embodiments of the present invention. That is, any number of embodiments can be combined to meet the needs of different application scenarios. All of these are within the protection scope of this application and will not be described in detail here.

[0116] It should be noted that the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A clamping fixture having a first direction and a second direction that are perpendicular to each other, characterized in that: include, A base having a first channel and a second channel, wherein the axis of the first channel is parallel to the first direction and the axis of the second channel is parallel to the second direction; A first clamping assembly includes a rear clamping member and a front clamping member that are movable relative to each other on the base in a first direction, and the front clamping member and the base are connected by a first elastic member. The second clamping assembly includes a left clamping member and a right clamping member that are movable relative to each other on the base in a second direction; The front clamping member is connected to the first follower plate, which is connected in the first channel and can slide in the first channel along the first direction. The right-side clamping member is connected to the second follower plate, which is connected in the second channel and can slide in the second channel along the second direction. The second follower plate is driven by the driving member to move along the second direction. The first follower plate has a driving protrusion at its lower part and the second follower plate has a driving recess on its side. When the driving member drives the second follower plate to move along the second direction, the driving protrusion enters / disengages from the driving recess, causing the front clamping member to move relative to the rear clamping member along the first direction. The right-side clamping member and the second follower plate are connected by a movable seat. A connecting plate is formed on the movable seat, and a positioning groove is provided on the connecting plate. A first pin is slidably connected in the positioning groove. A hinge support is formed on the second follower plate. The connecting plate is hinged to the hinge support through the first pin. A second elastic member is provided between the hinge support and the movable seat.

2. The clamping fixture according to claim 1, characterized in that: The driving recess is trapezoidal or arc-shaped, and the shape of the driving protrusion is adapted to the shape of the driving recess.

3. The clamping fixture according to claim 2, characterized in that: The trapezoid is a right-angled trapezoid or an isosceles trapezoid.

4. The clamping fixture according to claim 1, characterized in that: The upper part of the first follower plate is provided with a V-shaped groove, the opening of the V-shaped groove faces the second direction, and the upper part of the second follower plate is connected with a positioning pin, the positioning pin is located in the V-shaped groove and can move in the V-shaped groove.

5. The clamping fixture according to claim 4, characterized in that: The first follower plate includes a main body, the upper part of the main body extends toward the rear clamping member to form an extension plate, the extension plate is provided with the V-shaped groove, the extension plate overlaps the second follower plate, and the main body is provided with the driving protrusion on the side facing the second follower plate.

6. The clamping fixture according to claim 1, characterized in that: The movable base is provided with a second slot, and the right-side clamp is inserted into the second slot.

7. The clamping fixture according to claim 1, characterized in that: It also includes an end seat, the lower part of which is connected to a second adjusting screw via a thread, the axis of which is parallel to the second direction, and the second adjusting screw is used to abut against the base. The upper part of the end seat has a snap-fit ​​plate, and the movable seat is provided with a third slot, in which the snap-fit ​​plate is inserted.

8. The clamping fixture according to claim 1, characterized in that: The first follower plate is provided with a first slot, and the front clamping member is inserted into the first slot.

9. The clamping fixture according to claim 1, characterized in that: The base includes a base plate and a cover. The cover is connected to the base plate. The first channel and the second channel are both located on the cover. The cover is provided with a first sliding groove and a second sliding groove. The top end of the front clamping member extends out of the first sliding groove and can move in the first sliding groove along a first direction. The top end of the right clamping member extends out of the second sliding groove and can move in the second sliding groove along a second direction.

10. The clamping fixture according to claim 9, characterized in that: One end of the rear clamping member is fixed to the base plate, and the other end extends out of the cover. The edge of the cover protrudes upward to form the left clamping member.

11. The clamping fixture according to claim 10, characterized in that: The rear clamping member is connected to the first adjusting screw via a thread. The axis of the first adjusting screw is parallel to the first direction, and the first adjusting screw is used to abut against the first follower plate.

12. The clamping fixture according to claim 9, characterized in that: The length of the top end of the front clamping member along the second direction is greater than the length of the bottom end; the length of the top end of the right clamping member along the first direction is greater than the length of the bottom end.

13. The clamping fixture according to claim 1, characterized in that: The second follower plate is provided with a T-slot, in which a T-plate is inserted and connected to the drive end of the drive component.

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