Clamp suitable for automatic polishing machine and clamp device capable of achieving labor-saving clamping

Abstract

The clamp suitable for the automatic polishing machine comprises a base plate, a lower clamping plate and an upper clamping plate, the base plate is provided with a guide rod, the guide rod penetrates through the lower clamping plate to be connected with the upper clamping plate, and the base plate is provided with an elastic piece used for pushing the lower clamping plate to slide upwards. In addition, the clamp device capable of achieving labor-saving clamping comprises a bottom plate, a pushing mechanism and the clamp, the clamp is detachably connected to the upper face of the bottom plate, and the pushing mechanism can push the lower clamping plate to slide downwards. According to the clamp, the cutter is fixed and taken out by operating the lower clamping plate to slide up and down, operation is convenient, and working time is saved. In addition, after the clamp device capable of achieving labor-saving clamping is provided with the clamp, the tool can be conveniently and rapidly fixed and taken out, the lower clamping plate can be conveniently pushed to slide downwards through the pushing mechanism, the pushing mechanism does not need to be additionally found for operation, and operation is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of tool fixing, and particularly relates to a clamp suitable for an automatic polishing machine and a clamp device for labor-saving clamping. Background Art

[0002] Polishing operation steps for tool handle: first install the tool to be polished on the fixture, fix the tool handle with the fixture, and then fix the fixture to the polishing equipment. The polishing wheel of the polishing equipment grinds the surface of the tool handle to complete the polishing operation of the tool handle.

[0003] The existing tool handle polishing fixture structure generally includes a lower clamping plate, a stud provided on the lower clamping plate, an upper clamping plate sleeved on the outside of the stud, a nut being threadedly connected to the stud corresponding to the position above the upper clamping plate, and a plurality of tool fixing grooves being opened on the lower clamping plate. When in use, the nut can be screwed upward to disengage from the stud, and then the upper clamping plate can be slid upward to disengage from the stud. Then, the blade of the tool can be inserted into the tool fixing groove of the lower clamping plate, and then the upper clamping plate can be sleeved on the stud, and the nut can be screwed downward relative to the stud to press against the upper clamping plate, so that the upper clamping plate and the lower clamping plate clamp the blade of the tool. At this time, the tool handle is exposed outside the clamping plate, so that the tool can be fixed. At this time, the clamping plate is fixedly installed on the polishing equipment, and the tool handle can be polished, ensuring that the tool handle does not shake during the polishing process.

[0004] However, the existing tool handle polishing fixture still has some shortcomings: in the process of fixing the tool, the existing tool handle polishing fixture fixes the tool by screwing the nut to tighten the upper clamping plate, and when removing the upper clamping plate, it is necessary to screw the nut off the stud to remove the upper clamping plate. Since it takes a long time to screw the nut, the clamping efficiency is affected. In addition, in order to ensure the stability of the tool fixation, a wrench or other tools is required to tighten the nut during operation, which is inconvenient. Utility Model Content

[0005] In view of the above deficiencies in the prior art, one of the objects of the present invention is to provide a clamp suitable for an automatic polishing machine that is easy and quick to operate.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a clamp suitable for an automatic polishing machine, comprising a base plate, a lower clamping plate and an upper clamping plate, the above-mentioned lower clamping plate is located between the base plate and the upper clamping plate, and a guide rod is provided on the side of the base plate corresponding to the side opposite to the lower clamping plate. The guide rod passes through the lower clamping plate and is connected to the upper clamping plate. The lower clamping plate can slide up and down along the guide rod, and an elastic member is provided between the base plate and the lower clamping plate for pushing the lower clamping plate to slide upward.

[0007] In the above scheme, when the tool needs to be fixed, the lower clamping plate can be pushed downward by the pushing mechanism to compress the elastic member, so that the lower clamping plate slides downward and separates from the upper clamping plate. The blade of the tool is then inserted between the lower clamping plate and the upper clamping plate, with the handle of the tool exposed outside the clamp. The pushing mechanism is then operated to cancel the downward force on the lower clamping plate. At this time, the elastic member pushes the lower clamping plate to slide upward and move closer to the upper clamping plate through its own elastic force, so that the lower clamping plate and the upper clamping plate clamp the blade together. At this time, the blade cannot move in any direction under the clamping action of the two clamping plates, thereby fixing the tool. When the tool needs to be removed, the lower clamping plate can be pushed downward again by the pushing mechanism to release the clamping force of the two clamping plates on the blade, so that the blade can be removed from between the two clamping plates. The operation is convenient and quick.

[0008] Furthermore, the upper clamping plate is detachably connected to the upper end of the guide rod, and the guide rod is respectively arranged at both ends of the base plate. In this way, the upper clamping plate and the guide rod can be disassembled and separated to conveniently install the blade of the tool on the upper position of the lower clamping plate.

[0009] The guide rod is capable of sliding in the first and second through holes, and the guide rod is capable of sliding in the second and second through holes, and the guide rod is capable of sliding in the second and second through holes, and the guide rod is capable of sliding in the second and second through holes, and the guide rod is capable of sliding in the first ...

[0010] Furthermore, the above-mentioned guide rod and limit block are both cylindrical structures, and the center lines of the guide rod and the limit block are collinear, the diameter of the limit block is larger than the diameter of the guide rod, and the diameter of the guide rod is smaller than the width of the first through hole and the second through hole, so that the guide rod can slide in the first through hole and the second through hole, and the diameter of the limit block is larger than the width of the first through hole and smaller than the width of the second through hole, so that the limit block can pass through the second through hole but cannot pass through the first through hole.

[0011] Furthermore, the elastic member is a spring sleeved on the outside of the guide rod, one end of the spring is against the bottom of the lower clamping plate, and the other end is against the top of the base plate. In the absence of external force, the spring will push the lower clamping plate to slide upward through its own elastic force.

[0012] Furthermore, the lower clamping plate has a tool retaining groove formed on a side thereof opposite the upper clamping plate. The tool retaining groove extends through the front and rear sidewalls of the lower clamping plate. Blades can be inserted into the front and rear sidewalls of the tool retaining groove, respectively, so that the blades of two tools overlap within the tool retaining groove. This means that each tool retaining groove can be used to secure two tools. The opposing side walls of the tool retaining groove prevent the tools from moving left or right, and the sum of the thicknesses of the two overlapping blades is greater than or equal to the depth of the tool retaining groove, ensuring that the lower and upper clamping plates can securely clamp the tool blades.

[0013] Another object of the present invention is to provide a clamp device that is easy to operate and can be clamped with minimal effort.

[0014] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a labor-saving clamping clamp device, including a base plate, a pushing mechanism respectively arranged at both ends of the base plate, and the above-mentioned clamp, the above-mentioned clamp is placed on the base plate and located between the two pushing mechanisms, and the pushing mechanism can push the lower clamp to slide downward.

[0015] In the above scheme, when in use, the clamp is first placed on the base plate, and then the pushing mechanism is operated to push the lower clamp plate to slide downward, and then the blade of the tool is inserted between the lower clamp plate and the upper clamp plate. Then, the pushing mechanism is operated to cancel the downward force on the lower clamp plate. At this time, the elastic member will push the lower clamp plate to slide upward and approach the upper clamp plate through its own elastic force, so that the lower clamp plate and the upper clamp plate clamp the blade together, thereby fixing the tool. Finally, the clamp is removed from the base plate, and the clamp with the tool fixed is installed on the polishing equipment, so that the tool handle can be polished. When the tool needs to be removed, the clamp can be placed on the base plate again, and the pushing mechanism can be operated to push the lower clamp plate to slide downward to release the clamping force of the two clamp plates on the blade, so that the tool can be removed from between the two clamp plates of the clamp. The operation is convenient and fast.

[0016] Furthermore, the above-mentioned pushing mechanism includes a cylinder arranged on the bottom plate, a push rod that can be extended and retracted relative to the cylinder, a connecting block arranged at the end of the push rod, and a pressure rod arranged on the side of the connecting block corresponding to the opposite side of the lower splint. When the clamp is placed on the bottom plate, the pressure rod is located above the lower splint. At this time, the cylinder is opened to drive the push rod to retract relative to the cylinder. The push rod will drive the pressure rod downward to push the lower splint to slide downward, thereby realizing the structural function of the pushing mechanism to push the lower splint to slide downward; and driving the push rod to extend relative to the cylinder will drive the pressure rod to reset, thereby canceling the downward force on the lower splint. At this time, the spring will push the lower splint to slide upward and approach the upper splint.

[0017] Furthermore, the above-mentioned push rod can rotate relative to the cylinder, and the rotating push rod can drive the pressure rod to align and stagger the position above the lower clamping plate. When the rotating push rod drives the pressure rod to align with the position above the lower clamping plate, the pressure rod can push the lower clamping plate downward to slide downward; and when the rotating push rod drives the pressure rod to align and stagger the position above the lower clamping plate, the pressure rod and the connecting block will not block the lower clamping plate, which makes it more convenient to disassemble and assemble the clamp and the base plate, and also makes it more convenient to insert the blade of the tool into the tool fixing groove.

[0018] Furthermore, the above-mentioned substrate is against the position above the bottom plate, and a first positioning block and a second positioning block are respectively provided at both ends of the substrate on the bottom plate facing the corresponding clamp, wherein the first positioning block is an L-shaped structure, and the first positioning block and the second positioning block are respectively against the substrate, so that the substrate can be quickly positioned so that the lower clamp can be aligned to the position directly below the pressure rod, thereby realizing the rapid assembly operation of the clamp and the bottom plate.

[0019] The clamp of the utility model is to fix and remove the tool by operating the lower clamp plate to slide up and down. Compared with the existing clamps that fix the tool by screwing the nut, the clamp of the utility model is more convenient and faster to operate, saving working time. In addition, the clamp device of the utility model is equipped with the above-mentioned clamp, which not only fixes and removes the tool conveniently and quickly, but also has a pushing mechanism that can easily push the lower clamp plate to slide downward, without having to find a separate pushing mechanism to operate, making operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the exploded structure of the clamps of Examples 1 and 2 of the present invention.

[0021] Figure 2 Schematic diagram of the structure of the clamps of embodiments 1 and 2 of the present invention.

[0022] Figure 3 for Figure 2 Middle AA section view.

[0023] Figure 4 This is a diagram of the use status of the first and second clamps of the embodiment of the utility model (the upper clamping block and the guide rod are disassembled and separated in the figure).

[0024] Figure 5 This is a diagram of the use status of the first and second clamps of the embodiment of the utility model (the upper clamping block and the guide rod are assembled in the figure).

[0025] Figure 6 This is a structural schematic diagram of a clamp device for labor-saving clamping according to a third embodiment of the present invention.

[0026] Figure 7 This is a structural schematic diagram of a clamp device for labor-saving clamping according to a third embodiment of the present invention (the structure of the clamp is omitted in the figure). DETAILED DESCRIPTION

[0027] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the accompanying drawings. The positional relationships depicted in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0030] Example 1

[0031] like Figure 1-3 As shown, this embodiment provides a clamp suitable for an automatic polishing machine, including a base plate 1, a lower clamping plate 2 and an upper clamping plate 3. The lower clamping plate 2 is located between the base plate 1 and the upper clamping plate 3. A guide rod 11 is provided on the base plate 1. The upper end of the guide rod 11 passes through the lower clamping plate 2 and is connected to the upper clamping plate 3. The upper clamping plate 3 can be fixedly connected to the guide rod 11, and can also be detachably connected to the guide rod 11.

[0032] The upper clamping plate 3 of this embodiment is fixedly connected to the upper end of the guide rod 11, and the lower clamping plate 2 can slide up and down along the guide rod 11, and there are three guide rods 11, two of which are respectively arranged at the left and right ends of the base plate 1, and the other guide rod 11 is arranged in the middle position of the base plate 1, so that the three guide rods 11 are evenly arranged on the base plate 1 to improve the sliding stability of the lower clamping plate 2. An elastic member 4 is provided between the above-mentioned base plate 1 and the lower clamping plate 2 for pushing the lower clamping plate 2 to slide upward.

[0033] like Figure 1 、 4As shown, the lower clamping plate 2 is provided with a plurality of tool fixing slots 21. All tool fixing slots 21 are sequentially arranged on the upper position of the lower clamping plate 2, and the tool fixing slots 21 pass through the front and rear side walls of the lower clamping plate 2. In this way, blades can be inserted into the front and rear side walls of the tool fixing slots 21, respectively, so that the blades of two tools are stacked on top of each other in the tool fixing slots 21, which is equivalent to each tool fixing slot 21 being able to be used to fix two tools. Among them, the opposite side walls of the tool fixing slots 21 can prevent the tools from moving left and right, and the sum of the thicknesses of the two stacked blades is greater than or equal to the depth of the tool fixing slots 21, so as to ensure that the lower clamping plate 2 and the upper clamping plate 3 can clamp the blades of the tools. In order to prevent the blades from being crushed, the bottom of the tool fixing slots 21 and the underside of the upper clamping plate 3 are provided with soft rubber pads.

[0034] When the clamp of this embodiment is used, when it is necessary to fix the tool on the clamp, the pushing mechanism can be used to push the lower clamping plate 2 downward to compress the elastic member 4, so that the lower clamping plate 2 slides downward and separates from the upper clamping plate 3. At this time, the user can insert the blade of the tool into the tool fixing groove 21, and the handle of the tool is exposed outside the clamp. Then the pushing mechanism is operated to cancel the downward force on the lower clamping plate 2. At this time, the elastic member 4 will push the lower clamping plate 2 to slide upward and move closer to the upper clamping plate 3 through its own elastic force, so that the lower clamping plate 2 and the upper clamping plate 3 clamp the blade together. Figure 5 As shown, at this time, the blade cannot move in all directions due to the clamping action of the two splints, thereby completing the fixing operation of the tool. Finally, the fixture with the tool fixed is installed on the polishing equipment. The polishing wheel of the polishing equipment will polish the tool handle, and the fixture can ensure that the tool will not shake during the polishing process, thereby ensuring the polishing effect of the tool handle.

[0035] When the tool needs to be removed from the fixture, the fixture can be disassembled from the polishing equipment, and then the lower clamping plate 2 can be pushed downward by the pushing mechanism to separate it from the upper clamping plate 3 to release the clamping force of the two clamping plates on the blade. Then the blade can be removed from the tool fixing groove 21 to remove the tool from the fixture.

[0036] The clamp of this embodiment completes the fixing and removal operations of the tool by operating the lower clamp 2 to slide up and down. Compared with the existing clamp that fixes the tool by screwing the nut, the clamp of this embodiment is more convenient and faster to operate, saving working time.

[0037] Example 2

[0038] The fixture structure of this embodiment is basically the same as that of the first embodiment, except that Figure 1-3As shown, the upper clamping plate 3 is detachably connected to the upper end of the guide rod 11. The upper clamping plate 3 is provided with a first through hole 31 and a second through hole 32 that are interconnected at the position corresponding to the guide rod 11. The width of the second through hole 32 is greater than the width of the first through hole 31. The guide rod 11 can slide up and down in the first through hole 31 and the second through hole 32, and can slide into the second through hole 32 in the first through hole 31, and can slide into the first through hole 31 in the second through hole 32. A stop block 12 is provided at the upper end of the guide rod 11. The stop block 12 can pass through the second through hole 32 but cannot pass through the first through hole 31. When the guide rod 31 is placed in the first through hole 31, the elastic member 4 pushes the lower clamping plate 2 to drive the upper clamping plate 3 to slide upward, so that the upper surface of the upper clamping plate 3 abuts against the lower side of the stop block 12. At this time, the upper clamping plate 3 cannot move in any direction due to the mutual clamping action of the stop block 12 and the lower clamping plate 2, thereby realizing the connection between the upper clamping plate 3 and the guide rod 11.

[0039] When the upper splint 3 needs to be removed, the lower splint 2 can be pushed to slide downward, and the upper splint 3 will also slide downward, so that the upper side of the upper splint 3 is free from the interference of the limit block 12, and then the upper splint 3 is moved forward so that the guide rod 11 is placed in the second through hole 32, and the limit block 12 is aligned with the second through hole 32, and then the upper splint 3 is moved upward so that the second through hole 32 of the upper splint 3 is free from the guide rod 11 and the limit block 12, so that the upper splint 3 can be disassembled and separated from the guide rod 11.

[0040] like Figure 4 As shown, after the upper clamping plate 3 is disassembled and separated from the guide rod 11, the user can insert the blade of the tool into the tool fixing groove 21, and then put the second through hole 32 of the upper clamping plate 3 through the limit block 12 and into the outer position of the guide rod 11, and then move the upper clamping plate 3 backward so that the guide rod 11 is placed in the first through hole. At this time, the upper clamping plate 3 is pressed on the upper position of the blade, and finally the downward force on the lower clamping block 2 is canceled. The elastic member 4 will push the lower clamping block 2 to drive the blade and the upper clamping plate 3 to slide upward, so that the upper side of the upper clamping plate 3 is against the lower side of the limit block 12, as shown in FIG. Figure 5 As shown, the tool fixing operation can be completed in this way.

[0041] The clamp of this embodiment is detachably connected to the upper clamping plate 3 and the upper end of the guide rod 11, so that the user can disassemble and separate the upper clamping plate 3 so that there is no obstruction of the upper clamping plate 3 above the tool fixing groove 21, thereby making it easier to insert the blade of the tool into the tool fixing groove 21.

[0042] Specifically, the above-mentioned guide rod 11 and limit block 12 are both cylindrical structures, and the center lines of the guide rod 11 and the limit block 12 are collinear, the diameter of the limit block 12 is larger than the diameter of the guide rod 11, and the diameter of the guide rod 11 is smaller than the width of the first through hole 31 and the second through hole 32, so that the guide rod 11 can slide in the first through hole 31 and the second through hole 32, and the diameter of the limit block 12 is larger than the width of the first through hole 31 and smaller than the width of the second through hole 32, so that the limit block 12 can pass through the second through hole 32 but cannot pass through the first through hole 11.

[0043] In addition, the above-mentioned elastic member 4 is a spring mounted on the outside of the guide rod 11. The upper end of the spring is against the bottom of the lower clamping plate 2, and the lower end of the spring is against the top of the base plate 1. In the absence of external force, the spring will push the lower clamping plate 2 to slide upward through its own elastic force.

[0044] Example 3

[0045] like Figure 6 As shown, this embodiment provides a clamp device for labor-saving clamping, including a base plate 5, a pushing mechanism 6 respectively arranged at both ends of the base plate 5, and the clamp of embodiment 2. The above-mentioned clamp is placed on the base plate 5 and located between the two pushing mechanisms 6. The pushing mechanism 6 can push the lower clamp 2 to slide downward.

[0046] Specifically, the above-mentioned pushing mechanism 6 includes a cylinder 61 arranged on the base plate 5, a push rod 62 that can be extended and retracted relative to the cylinder 61, a connecting block 63 arranged at the upper end of the push rod 62, and a pressure rod 64 arranged below the connecting block 63. When the clamp is placed on the base plate 5, the pressure rod 64 is located above the lower splint 2. At this time, the cylinder 61 is opened to drive the push rod 62 to retract relative to the cylinder 61. The push rod 62 will drive the connecting block 63 and the pressure rod 64 to move downward, and the pressure rod 64 will push the lower splint 2 to slide downward, thereby realizing the structural function of the pushing mechanism 6 to push the lower splint 2 to slide downward; and driving the push rod 62 to extend relative to the cylinder 61 will drive the pressure rod 64 to move upward and reset, thereby canceling the downward force on the lower splint 2. At this time, the spring will push the lower splint 2 to slide upward and move closer to the upper splint 3.

[0047] like Figure 7 As shown, the above-mentioned substrate 1 is against the position above the bottom plate 5, and a first positioning block 51 and a second positioning block 52 are provided on the bottom plate 5, wherein the first positioning block 51 is an L-shaped structure, and the second positioning block 52 is a long strip structure. The first positioning block 51 of the L-shaped structure is against a corner position on the left front of the substrate 1, and the second positioning block 52 is against the front side wall of the right end of the substrate 1 to position the substrate 1, so that the lower clamping plate 2 can be aligned with the position directly below the pressure rod 64, thereby realizing the rapid assembly operation of the clamp and the bottom plate 5.

[0048] When the labor-saving clamping fixture device of this embodiment is used, the fixture is first placed against the base plate 5, and the base plate 1 is pressed against the two positioning blocks. Then the cylinder 61 is opened to transmit the pressure rod 64 to push the lower clamping block 2 to slide downward. Then the upper clamping block 3 is disassembled and separated from the guide rod 1, and the blade of the tool is inserted into the tool fixing groove 21, and the first through hole 31 of the upper clamping block 3 is fitted on the outside of the guide rod 11. Finally, the cylinder 61 is operated to transmit the pressure rod 64 to move upward, and the downward force on the lower clamping plate 2 is cancelled. At this time, the spring pushes the lower clamping plate 2 to slide upward, so that the lower clamping plate 2 and the upper clamping plate 3 clamp the blade to each other, so that the tool can be fixed. At this time, the user removes the clamp from the base plate 5 and installs the clamp with the tool fixed on the polishing equipment, so that the tool handle can be polished.

[0049] When the tool needs to be removed from the fixture, the fixture can be placed against the bottom plate 5, the pressure rod 64 pushes the lower clamping block 2 to slide downward, and then the upper clamping block 3 is disassembled from the guide rod 1, and the tool can be removed from the fixture. The operation is convenient and fast.

[0050] As an improvement to this embodiment, the push rod 62 can rotate relative to the cylinder 61. Rotating the push rod 62 can drive the pressure rod 64 to align and stagger the upper position of the lower clamping plate 2. Figure 6 As shown, when the push rod 62 is rotated to drive the pressure rod 64 to align with the upper position of the lower splint 2, the pressure rod 64 can push the lower splint 2 downward to slide downward; Figure 7 As shown, when the push rod 62 is rotated to drive the pressure rod 64 to be offset from the upper position of the lower splint 2, the pressure rod 64 and the connecting block 63 will not block the lower splint 2, which can facilitate the disassembly and assembly of the clamp and the base plate 5, and also make it easier to insert the blade of the tool into the tool fixing groove 21.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A fixture suitable for an automatic polishing machine, characterized in that : It comprises a base plate (1), a lower clamping plate (2) and an upper clamping plate (3), wherein the lower clamping plate (2) is located between the base plate (1) and the upper clamping plate (3), and a guide rod (11) is provided on the side of the base plate (1) corresponding to the side opposite to the lower clamping plate (2), and the guide rod (11) passes through the lower clamping plate (2) and is connected to the upper clamping plate (3), and the lower clamping plate (2) can slide up and down along the guide rod (11), and an elastic member (4) is provided between the base plate (1) and the lower clamping plate (2) for pushing the lower clamping plate (2) to slide upward.

2. The fixture for an automatic polishing machine according to claim 1, characterized in that: The upper clamping plate (3) is detachably connected to the upper end of the guide rod (11), and the guide rod (11) is respectively arranged at both ends of the base plate (1).

3. The fixture for an automatic polishing machine according to claim 2, characterized in that: The upper clamping plate (3) is provided with a first through hole (31) and a second through hole (32) which are interconnected. The guide rod (11) can slide in the first through hole (31) and the second through hole (32). A limit block (12) is provided at the upper end of the guide rod (11). The limit block (12) can pass through the second through hole (32) but cannot pass through the first through hole (31). When the guide rod (11) is placed in the first through hole (31), the elastic member (4) pushes the lower clamping plate (2) to drive the upper clamping plate (3) to slide upward, so that the upper surface of the upper clamping plate (3) abuts against the lower side of the limit block (12).

4. The fixture for an automatic polishing machine according to claim 3, characterized in that: The guide rod (11) and the limit block (12) are both cylindrical structures, and the center lines of the guide rod (11) and the limit block (12) are collinear. The diameter of the limit block (12) is larger than the diameter of the guide rod (11), the diameter of the guide rod (11) is smaller than the width of the first through hole (31) and the second through hole (32), and the diameter of the limit block (12) is larger than the width of the first through hole (31) and smaller than the width of the second through hole (32).

5. The fixture for an automatic polishing machine according to claim 1, characterized in that: The elastic member (4) is a spring sleeved on the outside of the guide rod (11), one end of the spring abuts against the bottom of the lower clamping plate (2), and the other end abuts against the top of the base plate (1).

6. The fixture for an automatic polishing machine according to any one of claims 1 to 5, characterized in that: A tool fixing groove (21) is provided on a side of the lower clamping plate (2) that is opposite to the upper clamping plate (3), and the tool fixing groove (21) passes through the front and rear side walls of the lower clamping plate (2).

7. A clamping device for labor-saving clamping, characterized in that : It includes a base plate (5), a pushing mechanism (6) respectively arranged at both ends of the base plate (5), and a clamp as described in any one of claims 1 to 6, wherein the clamp is placed on the base plate (5) and located between the two pushing mechanisms (6), and the pushing mechanism (6) can push the lower clamp (2) to slide downward.

8. The labor-saving clamping device according to claim 7, characterized in that: The pushing mechanism (6) includes a cylinder (61) arranged on the bottom plate (5), a push rod (62) that can be extended and retracted relative to the cylinder (61), a connecting block (63) arranged at the end of the push rod (62), and a pressure rod (64) arranged on the side of the connecting block (63) corresponding to the side opposite to the lower clamping plate (2), and the pressure rod (64) is located above the lower clamping plate (2).

9. The labor-saving clamping device according to claim 8, characterized in that: The push rod (62) can rotate relative to the cylinder (61), and the rotation of the push rod (62) can drive the pressure rod (64) to align and stagger the upper position of the lower clamping plate (2).

10. The labor-saving clamping device according to claim 8, characterized in that: The substrate (1) is abutted against the upper portion of the bottom plate (5), and a first positioning block (51) and a second positioning block (52) are respectively provided on the upper portion of the bottom plate (5) at positions corresponding to both ends of the substrate (1) of the fixture, wherein the first positioning block (51) is an L-shaped structure, and the first positioning block (51) and the second positioning block (52) are respectively abutted against the substrate (1).

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