A clamp for heat treatment of die cast workpieces

Abstract

This utility model discloses a fixture for heat treatment of die-cast workpieces, including a fixture frame, several positioning modules, and several clamping modules. The fixture frame extends vertically upward, and both of its thickness-direction surfaces are clamping surfaces. Each clamping surface has a positioning module corresponding to a mounting hole on the workpiece to be processed, and each positioning module has a positioning part that matches the corresponding mounting hole on the workpiece. A clamping module is provided on one side of each clamping surface corresponding to any positioning module. Each clamping module includes a clamping part and a driving part. The driving part, under control, drives the clamping part to move relative to the fixture frame towards or away from its corresponding positioning part. The fixture uses a vertical placement of the workpieces, occupies a small area, and can simultaneously clamp two workpieces, shortening the processing cycle and improving processing efficiency. The clamping and positioning modules have simple structures and are detachable for replacement, making them suitable for heat treatment of various workpieces.

Description

Technical Field

[0001] This utility model relates to the field of mold processing tooling technology, specifically to a fixture for heat treatment of die-cast workpieces. Background Technology

[0002] In order to ensure that die-cast workpieces have the required mechanical properties, physical properties, and other mechanical properties, in addition to the rational selection of materials and control of the die-casting process, heat treatment is often indispensable. When heat-treating die-cast workpieces, it is usually necessary to use fixtures to hold the workpieces to increase the stability of the heat treatment process.

[0003] Existing subframes are formed by high-pressure casting, and heat treatment is required to improve their mechanical properties. However, most existing fixtures place the workpiece flat on the fixture, which typically can only hold one workpiece at a time. If multiple workpieces need to be held simultaneously, larger fixtures are usually required, resulting in a larger tool footprint. Furthermore, processing multiple workpieces increases the processing cycle time, making it more time-consuming and labor-intensive. Moreover, due to the thin walls, large size, and irregular shape of high-pressure cast subframes, traditional flat-lay fixtures present placement difficulties. Therefore, this invention addresses these issues. Utility Model Content

[0004] In view of at least one of the above-mentioned technical problems, the purpose of this utility model is to provide a fixture for heat treatment of die-cast workpieces, which adopts a vertical placement of the workpieces to be processed, occupies a small area, and can clamp two workpieces to be processed at the same time, thereby shortening the processing cycle and improving processing efficiency.

[0005] The technical solution of this utility model is:

[0006] The purpose of this utility model is to provide a fixture for heat treatment of die-cast workpieces, including:

[0007] A clamping frame that extends vertically upward, with both sides in its thickness direction serving as clamping surfaces;

[0008] A plurality of positioning modules, wherein any of the clamping surfaces is provided with positioning modules that correspond one-to-one with the mounting holes on the workpiece to be processed, and any of the positioning modules has a positioning part that matches the corresponding mounting hole on the workpiece to be processed;

[0009] A plurality of clamping modules are provided, and a clamping module is provided on one side of any clamping surface corresponding to any positioning module. Each clamping module includes a clamping part and a driving part. The driving part is controlled to drive the clamping part to move relative to the fixture frame in a direction closer to or farther from the positioning part of its corresponding positioning module to clamp or release the workpiece to be processed positioned on the positioning part.

[0010] Preferably, any of the positioning modules is detachably connected to its corresponding clamping surface.

[0011] Preferably, any of the positioning modules further includes a positioning seat that is detachably connected to the corresponding clamping surface, and the positioning seat and the positioning part of any of the positioning modules are an integral structure.

[0012] Preferably, the positioning part and the positioning seat are cylindrical structures arranged coaxially along the axial direction, and the diameter of the positioning seat is larger than that of the positioning part.

[0013] Preferably, any of the clamping modules is detachably connected to its corresponding clamping surface.

[0014] Preferably, any of the clamping modules further includes a clamping seat detachably connected to its corresponding clamping surface, and the driving part of any of the clamping modules is detachably connected to its corresponding clamping seat.

[0015] Preferably, any one of the drive units includes:

[0016] A base, which is detachably connected to the clamping seat, and the side of the base facing away from the clamping seat has an elongated groove;

[0017] A connecting rod, one end of which is rotatably connected to the two side walls at one end of the long groove;

[0018] The operating lever includes a rod body in the shape of a straight line and an extension portion that extends outward from the middle of the rod body, the outer end of the extension portion being rotatably connected to the other end of the connecting rod.

[0019] The drive rod includes a first rod body and a second rod body arranged in an L-shape, with the end of the first connecting rod away from the second rod body rotatably connected to the two side walls of the other end of the long groove, the intersection of the first rod body and the second rod body rotatably connected to one end of the rod body portion, and the end of the second rod body away from the first rod body connected to the clamping part.

[0020] Preferably, the extension is triangular in shape;

[0021] The driving unit has an open position that drives the pressing unit away from the corresponding positioning unit and a pressing position that drives the pressing unit closer to the corresponding positioning unit;

[0022] Let the rotational connection position between the connecting rod and the long slot be the first rotation point, the rotational connection position between the connecting rod and the extension be the second rotation point, and the rotational connection position between the rod body and the drive rod be the third rotation point;

[0023] When in the clamping position, the rod body and the second rod body are in the same straight line and parallel to the extension direction of the long groove, and the first rotation point, the second rotation point, and the third rotation point are collinear and the angle between them and the first rod body is less than 90°.

[0024] When switching from the pressed position to the open position, the rod part is controlled to move in a direction away from the base and the second rod moves in a direction away from its corresponding positioning part. The second rod and the rod part move closer to each other around the third rotation point, and the angle between the extension and the first rod gradually increases.

[0025] When the rod reaches the open position, the angle between the rod body and the second rod body is greater than 90°, the first rotation point, the second rotation point and the third rotation point are not collinear, the angle between the connecting rod and the extension is less than 90°, and the first rod body is parallel to the connecting rod.

[0026] Preferably, the clamping part includes a connecting rod, a clamping block, and two nuts movably connected to the connecting rod. The connecting rod and the clamping block are arranged in a T-shape, and the length of the clamping block is greater than the width of the positioning part of the corresponding positioning module.

[0027] The second rod body has through holes on its two end faces opposite to the positioning part. The connecting rod passes through the through holes and is locked and fixed by the two nuts.

[0028] When the clamping part is locked on the drive rod, the two nuts are respectively located on both sides of the through hole opened on the second rod body.

[0029] Preferably, the perforation extends along the length of the second rod from near the first rod to away from the first rod;

[0030] The clamping part can be locked at any position of the perforation.

[0031] Compared with the prior art, the advantages of this utility model are:

[0032] This utility model discloses a fixture for heat treatment of die-cast workpieces. It features a vertical placement of the workpieces, resulting in a small footprint. It can simultaneously clamp two workpieces, shortening the processing cycle and improving processing efficiency. The clamping and positioning modules have simple structures and are detachable for easy replacement, making it suitable for heat treatment of various workpieces. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Figure 1This is a three-dimensional structural diagram of a fixture for heat treatment of die-cast workpieces according to an embodiment of the present utility model;

[0035] Figure 2 This is a side view of a fixture for heat treatment of die-cast workpieces according to an embodiment of the present invention;

[0036] Figure 3 This is a three-dimensional structural view of the driving part and the clamping part of the clamping module of the fixture for heat treatment of die-cast workpieces according to an embodiment of the present utility model;

[0037] Figure 4 for Figure 3 Side view of the drive unit and the clamping unit of the clamping module;

[0038] Figure 5 This is a perspective view of a fixture for heat treatment of die-cast workpieces according to an embodiment of the present invention (omitting the drive part and clamping part of the clamping module);

[0039] Figure 6 This is a diagram showing the opening process of the fixture for heat treatment of die-cast workpieces according to an embodiment of this utility model.

[0040] The components are as follows: 10. Fixture frame; 11. Base plate; 12. Reinforcing plate; 100. Clamping surface; 20. Pressing module; 21. Base; 211. Long groove; 2110. Groove wall; 2111. First rotation point; 2112. Fourth rotation point; 212. Connecting hole; 22. Connecting rod; 23. Operating rod; 231. Rod body; 232. Extension; 2321. Second rotation point; 2322. Third rotation point; 24. Drive rod; 241. First rod body; 242. Second rod body; 2421. Through hole; 25. Pressing part; 251. Pressing block; 252. Connecting rod; 253. Nut; 26. Pressing seat; 30. Positioning module; 31. Positioning part; 32. Positioning seat; 40. Lifting ring; 50. High-pressure subframe casting. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0042] This utility model provides a fixture for heat treatment of die-cast workpieces, specifically for high-pressure subframe castings 50 (complete structure not shown, only part shown). Figure 6 The heat treatment is shown in the side view (showing the location of the mounting holes). For details, see [link to relevant documentation]. Figures 1 to 6It mainly includes a clamping frame 10, several positioning modules 30, and several clamping modules 20. The positioning modules 30 and clamping modules 20 are in one-to-one correspondence, meaning their quantities are consistent. In this embodiment, the clamping frame 10 is vertically arranged, extending vertically upwards, and its two surfaces in the thickness direction are as follows... Figure 1 The front and rear surfaces shown are configured as clamping surfaces 100. Each clamping surface 100 is equipped with a corresponding positioning module 30 and a clamping module 20. This allows the fixture to simultaneously clamp die-cast workpieces to be heat-treated on both clamping surfaces 100, meaning that two workpieces to be heat-treated can be processed at once. Compared to existing fixtures that use a flat surface and can only clamp on the upper surface, the fixture of this embodiment can improve heat treatment processing efficiency and reduce processing cycle. For the positioning module 30, each clamping surface 100 is provided with a positioning module 30 that corresponds one-to-one with the mounting holes on the workpiece to be processed (not shown, that is, the body mounting holes, which are equivalent to the first front body mounting hole 1001, the second front body mounting hole 1002, the first rear body mounting hole 1007 and the second rear body mounting hole 1008 in patent publication document number CN114802453B, so they are not described or limited here). Each positioning module 30 has a positioning part 31 that matches the mounting hole of the workpiece to be processed. The initial positioning of the workpiece to be processed on the clamping surface 100 of the fixture frame 10 is achieved by assembling the positioning part 31 with the mounting hole on the workpiece to be processed. Each clamping module 20 is correspondingly disposed on the side of a positioning module 30, and each clamping module 20 includes a clamping part 25 and a driving part. The driving part is controlled to drive the clamping part 25 to move relative to the fixture frame 10 in a direction closer to or farther from the positioning part 31 of its corresponding positioning module 30, so as to clamp and fix or release the workpiece to be processed that is initially positioned on the positioning module 30. That is to say, the clamping module 20 only presses on the part of the workpiece to be processed that is positioned on the positioning module 30, that is, the outer surface of the mounting hole. The contact area is small, which can reduce the problem of excessive deformation of the workpiece and large deformation area during clamping.

[0043] The number of positioning modules 30 and clamping modules 20 on any clamping surface 100 is not specifically described or limited, and is determined based on the number of mounting holes on the workpiece to be processed. In the fixture of this embodiment, as shown... Figure 1Preferably, there are six clamping modules 20, distributed in the upper, middle, and lower regions of the clamping surface 100, with two modules in each region. The relative positions of the clamping modules 20 and their corresponding positioning modules 30 differ in each region. For example, the clamping modules 20 at the upper end of the clamping surface 100 are above their corresponding positioning modules 30; the clamping modules 20 at the middle and lower ends are both outside their respective positioning modules 30. In a preferred embodiment, the number of positioning modules 30 and clamping modules 20 on the two clamping surfaces 100 is the same, meaning the positioning modules 30 and clamping modules 20 on the two clamping surfaces 100 are symmetrically designed.

[0044] Preferred embodiments, such as Figure 1 and Figure 2 and Figure 5 As shown, any positioning module 30 also includes a positioning seat 32, and the positioning part 31 and the positioning seat 32 of any positioning module 30 are preferably an integral structure. In this embodiment of the present invention, the mounting hole of the workpiece to be processed is a cylindrical through hole, so the positioning part 31 of the positioning module 30 of the present invention is also a cylindrical structure, and the positioning seat 32 is preferably also cylindrical. The diameter of the positioning seat 32 is larger than the diameter of the positioning part 31. The height, i.e., the axial length, of the positioning part 31 and the positioning seat 32 is not particularly limited. In this embodiment of the present invention, not all positioning parts 31 and / or positioning seats 32 of the positioning modules 30 have the same height, i.e., the same axial length; some are the same, and some are not. It is mainly determined by the distance from the mounting hole of the workpiece to be processed to the clamping surface 100. Figure 1 As can be seen, the axial length of the positioning seat 32 of some positioning modules 30 is longer than that of some, and similarly, the axial length of the positioning part 31 of some positioning modules 30 is longer than that of some. Since the length of the positioning module 30 in this embodiment of the utility model needs to be selected according to the corresponding mounting hole, in order to make the fixture applicable to different workpieces, the positioning module 30, specifically the positioning seat 32, preferably adopts a detachable connection method with the clamping surface 100, such as a threaded connection, a snap-fit ​​connection, or a magnetic connection.

[0045] In a preferred embodiment, since the clamping module 20 and the positioning module 30 are in one-to-one correspondence, the clamping module 20 is also preferably detachably connected to the clamping surface 100. Specifically, as shown... Figures 1 to 4 As shown, any clamping module 20 also includes a clamping seat 26, meaning that any clamping module 20 includes a clamping part 25, a driving part, and a clamping seat 26. The clamping seat 26 is detachably connected to the clamping surface 100, and the driving part is also detachably connected to the clamping seat 26. The detachable connection method can be threaded connection, snap-fit ​​connection, or magnetic connection, etc. In this embodiment of the invention, the height of the clamping seat 26 of all clamping modules 20 is not the same. Figure 1 and Figure 2 It can be seen that the height of some clamping seats 26 is consistent, while that of others is inconsistent. Specifically, it is determined according to the axial length of the positioning module 30 corresponding to each clamping module 20. If the total axial length of the positioning seat 32 and the positioning part 31 of the positioning module 30 is long, the height of the corresponding clamping seat 26 of the clamping module 20 is also high. In this embodiment of the present invention, the clamping seat 26 is detachably connected to the clamping surface 100 to accommodate changes in the axial length of the corresponding positioning module 30 and changes in the position of the corresponding positioning module 30. The detachable connection between the clamping seat 26 and the driving part is also to accommodate replacement of the clamping seat 26. More specifically, in this embodiment of the present invention, the clamping seat 26 is a square block. The structure of the clamping part 25 of all clamping modules 20 is consistent. Each driving part includes four parts: base 21, connecting rod 22, operating rod 23, and driving rod 24. More specifically, the base 21 has a T-shaped structure, including a plate-shaped base 21 body and a U-shaped long groove 211 that protrudes outward and extends along the length of the base 21 body, located at the middle of one surface of the base 21 body. The long groove 211 includes two opposing and spaced-apart groove walls 2110 and one end connected to the two groove walls 2110 (specifically as shown in the figure). Figure 3 The lower end of the base 21 (not shown, its purpose is to limit the movement of the first connecting rod 22) has a connecting wall (not marked, its purpose is to limit the movement of the first connecting rod 22). Corresponding connecting holes 212 are provided between the base 21 body and the corresponding clamping seat 26 to facilitate connection using fasteners such as screws. The connecting rod 22 is a long rod structure, one end of which connects to one end of the two side walls of the long groove 211, i.e., one end of the two groove walls 2110, specifically as shown below. Figure 4 The upper rotating connection shown is specifically a hinged connection. The operating lever 23 has a roughly L-shaped or hook-shaped structure, specifically including a rod-shaped body 231 and a triangular extension 232 extending outward from the middle of the rod body 231. The outer end of the extension 232 is rotatably connected to the other end of the connecting rod 22, specifically a hinged connection. The extension 232 extends to the other end of the rod body 231, that is, as shown... Figure 4 The lower end shown is rotatably connected to the operating lever 23, specifically by a hinge connection. The extension 232 has an internal clearance cavity (not shown), meaning the extension is actually composed of two relatively spaced parts, with the middle gap forming the clearance cavity. The lever body 231 is hollowed out corresponding to the clearance cavity (e.g., ...). Figure 3 The rod portion 231 shown has an elongated hole (not shown) on one side to allow the connecting rod 22 to switch between the pressed and opened positions without interference. The drive rod 24 is also L-shaped and includes a first rod 241 and a second rod 242, which are designed perpendicularly. The end of the first rod 241 furthest from the second rod 242 is connected to the other end of the elongated slot 211... Figure 4The rotatable connection between the two groove walls 2110 at the lower end shown is specifically a hinged connection. The other end of the first rod 241 is connected to the upper end of the second rod 242; that is, the rotatable connection between the connection point of the first rod 241 and the second rod 242 and the connection point of the rod portion 231 and the extension portion 232 is specifically a hinged connection. The other end of the second rod 242 extends away from the first rod 241 and the operating lever 23, i.e.... Figure 4 The connecting rod 22 extends downwards as shown, and its other end is connected to the clamping part 25. In this embodiment of the invention, the length of the connecting rod 22 is less than the length of the first rod 241. The driving part of the clamping module 20 in this embodiment of the invention has a clamping state where the clamping part 25 is driven close to its corresponding positioning part 31, and a releasing state where the clamping part 25 is driven away from its corresponding positioning part 31. Specifically, for ease of description and distinction, the rotational connection position of the connecting rod 22 and the long groove 211 is described as the first rotation point 2111, the rotational connection position of the connecting rod 22 and the extension part 232 is described as the second rotation point 2321, the rotational connection position of the rod part 231 and the driving rod 24 is described as the third rotation point 2322, and the rotational connection point of the first rod 241 and the long groove 211 is described as the fourth rotation point 2112. Figure 4 As shown, when the driving part of the clamping module 20 is in the clamping state, that is, in the clamping position, the rod part 231 and the second rod 242 are in the same straight line. Figure 4 The first rod 241 is perpendicular to the long groove 211, and the first rotation point 2111, the second rotation point 2321, and the third rotation point 2322 are collinear and the angle γ between them and the first rod 241 is less than 90° (the specific angle is not limited, but 60° is an example). This is achieved when switching from the pressed position to the open position (i.e., as shown in the image). Figure 6 As shown in (a) to (c), Figure 6 The diagrams (a) to (c) shown are all schematic diagrams of the opening process, where (c) is fully opened, and (a) and (b) are not fully opened. When the rod part 231 is controlled to move in a direction away from the base 21, and the second rod 242 moves in a direction away from its corresponding positioning part 31, the rod part 231 and the second rod 242 move towards each other around the third rotation point 2322, and the angle γ between the extension part 232 and the first rod 241 gradually increases. Figure 6 In the middle (a), the opening is just beginning and the opening angle is very small. Figure 6 (b) indicates the half-open state. Figure 6 In the middle (c) state, it is fully open, as can be seen from the fact that... Figure 6 From Figure (a) to Figure (c), γ gradually increases and changes from an acute angle (less than 90°) to an obtuse angle (greater than 90°). When it reaches the open position, that is... Figure 6As shown in (c), the angle between the rod body 231 and the second rod body 242 is less than 180° but still greater than 90° (the specifics are not described or limited), the first rotation point 2111, the second rotation point 2321 and the third rotation point 2322 are not collinear and the angle β between the connecting rod 22 and the extension 232 is less than 90°, and the first rod body 241 and the connecting rod 22 are in a parallel state.

[0046] For the clamping part 25, such as Figure 3 and Figure 4 As shown, it includes a rod-shaped connecting rod 252, a block-shaped clamping block 251, and two nuts 253 movably connected to the connecting rod 252. The connecting rod 252 and the clamping block 251 are arranged in a T-shape. The clamping block 251 has a square block structure, and the length of the clamping block 251 is greater than the width (i.e., diameter) of its corresponding positioning part 31. That is, part of the clamping block 251 is located outside its corresponding positioning part 31. Thus, when the clamping block 251 is in the clamping position, it can partially press against the workpiece to be processed. The second rod body 242 has a through hole 2421 for the connecting rod 252 to pass through and connect. The connecting rod 252 is threaded through the through hole 2421, and the two nuts 253 are located on both sides of the second connecting rod 22, that is, as shown in the figure. Figure 4 The left and right sides are shown. The position (lateral position) of the connecting rod 252 within the through hole 2421 is achieved by using two nuts 253, thereby allowing adjustment of the distance between the clamping block 251 and the positioning part 31. Preferably, as shown... Figure 3 As shown, in this embodiment of the present invention, the perforation 2421 extends along the length of the second rod 242 from near the first rod 241 to away from the first rod 241, that is... Figure 3 The elongated hole extends from top to bottom as shown. The clamping part 25 can be adjusted in position (vertical position) of the connecting rod 252 within the through hole 2421 by tightening or loosening one of the nuts 253.

[0047] like Figure 1 and Figure 2 and Figure 5 As shown, to facilitate the handling of the clamp, two lifting rings 40 are provided at the top of the clamp frame 10 for convenient lifting operations. To improve the stability of the clamp frame 10, as... Figure 1 and Figure 2 and Figure 5As shown, the clamp frame 10 of this embodiment has a T-shaped structure, that is, it includes a vertical plate-shaped clamp frame body and a horizontal plate-shaped base plate 11 arranged perpendicularly to the clamp frame body. A triangular reinforcing plate 12 is also provided between the clamp frame body and the base plate 11. The clamp frame body, base plate 11, and reinforcing plate 12 are preferably integrally formed. More preferably, there is a hollow section in the middle of the clamp frame body, which can reduce weight and also meet the operator's need for maneuverability during installation or disassembly.

[0048] It should be noted that the overall thermal expansion of the fixture, consisting of the positioning module 30 and the clamping module 20, in this embodiment of the present invention is consistent with that of the workpiece to be processed (high-pressure aluminum alloy subframe). When the fixture of this embodiment of the present invention undergoes high-temperature heat treatment, the expansion of the casting pushes the clamping part 25, causing the drive rod 24 to move towards the operating rod 23. The drive part, i.e., the base 21, connecting rod 22, operating rod 23, and drive rod 24, also expands synchronously to counteract some of the force generated by the expansion of the casting, thereby maintaining the stable positioning of the casting, limiting disorderly deformation of the casting, and preventing damage to the casting.

[0049] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A fixture for heat treatment of die-cast workpieces, characterized in that, include: A clamping frame that extends vertically upward, with both sides in its thickness direction serving as clamping surfaces; A plurality of positioning modules, wherein any of the clamping surfaces is provided with positioning modules that correspond one-to-one with the mounting holes on the workpiece to be processed, and any of the positioning modules has a positioning part that matches the corresponding mounting hole on the workpiece to be processed; A plurality of clamping modules are provided, and a clamping module is provided on one side of any clamping surface corresponding to any positioning module. Each clamping module includes a clamping part and a driving part. The driving part is controlled to drive the clamping part to move relative to the fixture frame in a direction closer to or farther from the positioning part of its corresponding positioning module to clamp or release the workpiece to be processed positioned on the positioning part.

2. The clamp according to claim 1, characterized in that, Each of the positioning modules is detachably connected to its corresponding clamping surface.

3. The clamp according to claim 2, characterized in that, Each of the positioning modules further includes a positioning seat that is detachably connected to the corresponding clamping surface, and the positioning seat and the positioning part of each of the positioning modules are an integral structure.

4. The clamp according to claim 3, characterized in that, The positioning part and the positioning seat are cylindrical structures arranged coaxially along the axial direction, and the diameter of the positioning seat is larger than that of the positioning part.

5. The clamp according to claim 2, characterized in that, Each of the clamping modules is detachably connected to its corresponding clamping surface.

6. The clamp according to claim 5, characterized in that, Each of the clamping modules further includes a clamping seat detachably connected to its corresponding clamping surface, and the driving part of each of the clamping modules is detachably connected to its corresponding clamping seat.

7. The clamp according to claim 6, characterized in that, Any of the aforementioned drive units includes: A base, which is detachably connected to the clamping seat, and the side of the base facing away from the clamping seat has an elongated groove; A connecting rod, one end of which is rotatably connected to the two side walls at one end of the long groove; The operating lever includes a rod body in the shape of a straight line and an extension portion that extends outward from the middle of the rod body, the outer end of the extension portion being rotatably connected to the other end of the connecting rod. The drive rod includes a first rod body and a second rod body arranged in an L-shape, with one end of the first rod body away from the second rod body rotatably connected to the two side walls of the other end of the long groove, the intersection of the first rod body and the second rod body rotatably connected to one end of the rod body portion, and the end of the second rod body away from the first rod body connected to the clamping part.

8. The clamp according to claim 7, characterized in that, The extension is triangular in shape; The driving unit has an open position that drives the pressing unit away from the corresponding positioning unit and a pressing position that drives the pressing unit closer to the corresponding positioning unit; Let the rotational connection position between the connecting rod and the long slot be the first rotation point, the rotational connection position between the connecting rod and the extension be the second rotation point, and the rotational connection position between the rod body and the drive rod be the third rotation point; When in the clamping position, the rod body and the second rod body are in the same straight line and parallel to the extension direction of the long groove, and the first rotation point, the second rotation point, and the third rotation point are collinear and the angle between them and the first rod body is less than 90°. When switching from the pressed position to the open position, the rod part is controlled to move in a direction away from the base and the second rod moves in a direction away from its corresponding positioning part. The second rod and the rod part move closer to each other around the third rotation point, and the angle between the extension and the first rod gradually increases. When the rod reaches the open position, the angle between the rod body and the second rod body is greater than 90°, the first rotation point, the second rotation point and the third rotation point are not collinear, the angle between the connecting rod and the extension is less than 90°, and the first rod body is parallel to the connecting rod.

9. The clamp according to claim 7, characterized in that, The clamping part includes a connecting rod, a clamping block, and two nuts movably connected to the connecting rod. The connecting rod and the clamping block are arranged in a T-shape, and the length of the clamping block is greater than the width of the positioning part of the corresponding positioning module. The second rod body has through holes on its two end faces opposite to the positioning part. The connecting rod passes through the through holes and is locked and fixed by the two nuts. When the clamping part is locked on the drive rod, the two nuts are respectively located on both sides of the through hole opened on the second rod body.

10. The clamp according to claim 9, characterized in that, The perforation extends along the length of the second rod from near the first rod to away from the first rod; The clamping part can be locked at any position of the perforation.

Images