A double-screw double-guided dust-proof clamp

Abstract

The present invention discloses a double-screw double-guided dust-proof clamp, which has balanced clamping force, increased clamping space, and precise clamping, greatly improving the machining accuracy of workpieces. A gear structure is arranged in the clamping block, a crank is arranged at the power input end of the gear structure, and the two power output ends of the gear structure are symmetrically arranged relative to the middle of the clamping block. Screws are arranged on both power output ends, and guide tubes are sleeved on both screws. Two guide sleeves are installed on the workbench at positions corresponding to the guide tubes, and each guide tube can be inserted into the corresponding guide sleeve in a matching manner. Support tubes are correspondingly arranged along the axial extension direction of each guide sleeve. Nut mounting plates are fixedly provided with nuts at positions corresponding to the two screws, and the threaded ends of each screw can be inserted into the corresponding nut in a matching manner. The crank drives the double screws to rotate synchronously through the gear structure, so that the clamping block can reciprocate relative to the workbench to achieve the purpose of clamping.

Description

Technical Field

[0001] A double-screw double-guide dust-proof clamp of the present invention belongs to the technical field of woodworking installation. Background Art

[0002] The current clamping structure often has a single screw in the middle and guide structures on both sides. Affected by the screw and the guide structure, the workpiece to be clamped can only be located between the screw and the guide structure or outside the guide structure. Since the screw is located in the middle, when clamping the workpiece, the clamping block is stressed unilaterally, the clamping block is prone to tilt, the workpiece is stressed unevenly, the clamping is unstable, resulting in inaccurate clamping, affecting the machining accuracy of the workpiece, and there is a risk of the workpiece falling off during machining, causing safety hazards. In addition, the clamp is prone to damage and its service life is shortened. Summary of the Invention

[0003] The present invention overcomes the deficiencies of the prior art and provides a double-screw double-guide dust-proof clamp, which has balanced clamping force, increased clamping space, stable and accurate workpiece clamping, greatly improves the machining accuracy of the workpiece, enhances production safety, and prolongs the service life of the device.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: a double-screw double-guide dust-proof clamp, including a clamping block and a workbench. The clamping block can move relative to the workbench to form a clamping surface with the workbench. A gear structure is arranged in the clamping block. A crank is arranged at the power input end of the gear structure. The gear structure has two identical power output ends, which are symmetrically arranged relative to the middle of the clamping block. Screws are arranged on both power output ends. Driven by the gear structure, the two screws can rotate synchronously. Both of the two screws are sleeved with guide tubes. One end of each of the two guide tubes is fixed on the clamping block, and the other end of each of the two guide tubes is a free end. Two guide sleeves are installed on the workbench at positions corresponding to the guide tubes. Each guide tube can be inserted into the corresponding guide sleeve in a matching manner. The guide sleeve is used for guiding the guide tube. Support tubes are correspondingly arranged along the axial extension direction of each guide sleeve. One end of each of the two support tubes is fixedly arranged on the workbench, and the other end of each of the two support tubes is provided with a nut mounting plate. Nuts are fixedly arranged on the nut mounting plate at positions corresponding to the two screws. The threaded end of each screw can be inserted into the corresponding nut in a matching manner. The crank drives the double screws to rotate synchronously through the gear structure, so that the clamping block can reciprocate relative to the workbench to achieve the purpose of clamping.

[0005] The gear structure includes a driving gear, a transition gear and an output gear. The driving gear is located in the middle of the inner cavity of the clamping block. Transition gears are meshed on both sides of the driving gear. Output gears are arranged on the outer sides of the two transition gears. The driving gear, the transition gears and the output gears are covered in the inner cavity of the clamping block by a cover plate. A main shaft is arranged in the middle of the driving gear. One end of the main shaft is fixed on the driving gear, and the other end of the main shaft extends out of the cover plate and is connected with a crank. The end of each screw rod is correspondingly and fixedly arranged in the middle of the output gear.

[0006] A sealing gasket is arranged between the cover plate and the outer edge of the inner cavity of the clamping block.

[0007] The crank is a flat steel structure with a long hole in the middle. The long hole of the crank can be sleeved on the main shaft in a matching manner. Buffer pads are arranged on both sides of the main shaft. The buffer pads are used to prevent the end of the long hole of the crank from colliding with the main shaft when the crank moves radially relative to the main shaft along the long hole direction. A handle is fixedly arranged at the end of the crank.

[0008] Dust-proof covers with one end open are sleeved on the screw rods extending out of the nut mounting plate, and the open ends of the dust-proof covers are correspondingly and fixedly arranged outside the nut (9), so that the screw rods are in a closed chamber.

[0009] A U-shaped plate is fixedly arranged on the lower side of the workbench. The bottom end and one side of the U-shaped plate are fixedly arranged on the workbench. The nut mounting plate is either fixed on the side plate of the U-shaped plate or integrally formed with the side plate of the U-shaped plate.

[0010] U-shaped chutes are symmetrically arranged at the part where the main shaft is sleeved with the crank, and the long hole of the crank is sleeved in the chutes in a matching manner.

[0011] The present invention has the following beneficial effects compared with the prior art.

[0012] 1. The present invention adopts a double-screw structure, and the double-screw structure is located in the center of two groups of guide pipes and forms an integral body with the guiding device. Compared with the conventional structure with a single screw in the middle and guiding structures on both sides, the space for clamping workpieces is more flexible. Since the double screws rotate synchronously, the clamping block is not affected by the clamping force and always remains parallel to the workbench. Therefore, for the workpiece to be clamped, the clamping force can be balanced no matter at which position, the clamp runs more smoothly, and the workpiece is clamped more reliably.

[0013] 2. The present invention adopts a double-guiding structure. The guide pipes are installed on the clamping block. When the clamp runs, it moves along with the clamping block. The guide sleeves are fixed on the side of the workbench. The guide pipes and the guide sleeves can be precisely matched. The two groups of guide pipes are respectively sleeved outside the screw rods and play an accurate guiding role during the operation of the clamp, making the clamp run smoothly, improving the force application efficiency and the service life of the device.

[0014] 3. The present invention adopts a dust-proof design. The gear structure is located inside the clamping block cavity. The cavity has a cover plate, and there is a gasket between the cover plate and the edge of the clamping block cavity, thus ensuring that the gear transmission structure is in a sealed and dust-free environment. The tail end of the screw has a dust-proof cover design to ensure that the screw operates in a sealed and dust-free environment. The middle guide tube and the guide sleeve are precisely matched to prevent environmental dust from entering the screw space.

[0015] 4. The present invention adopts a variable-radius crank. A long groove is opened in the middle of the flat steel, which slides in the main shaft chute. When the crank is rotated, it drives the main shaft to rotate and can bear a relatively large torque. A handle is installed at one end of the crank. When holding the handle and rotating the crank, the radius centered on the main shaft can be changed at any time to achieve the best matching of the clamping operation speed and torque. Rubber buffer pads are installed on both sides of the main shaft chute. When the crank slides to the bottom and is about to approach the main shaft, it plays a buffering role to avoid the collision sound between metals.

[0016] 5. The present invention adopts a gear transmission mechanism, which is located inside the clamping block cavity. The middle driving gear is installed on the main shaft and rotates with the main shaft, driving the two transition gears on both sides. The two transition gears respectively drive the output gears on both sides, and the output gears on both sides are respectively installed with screws. Therefore, through the rotation of the middle main shaft, the synchronous rotation of the two screws on both sides is finally driven. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic structural diagram of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the gear structure in the present invention.

[0020] Figure 3 It is a front structural schematic diagram of the clamping block in the present invention.

[0021] Figure 4 It is a side schematic diagram of the present invention.

[0022] Figure 5 It is a working schematic diagram of the present invention.

[0023] Figure 6 It is a three-dimensional view of the present invention.

[0024] Figure 7 It is a reverse three-dimensional view of the present invention.

[0025] In the figure: 1 is a clamping block, 2 is a workbench, 3 is a gear structure, 31 is a driving gear, 32 is an intermediate gear, 33 is an output gear, 34 is a cover plate, 35 is a gasket, 4 is a crank, 5 is a screw rod, 6 is a guide tube, 7 is a guide sleeve, 8 is a nut mounting plate, 9 is a nut, 10 is a main shaft, 11 is a buffer pad, 12 is a handle, 13 is a dust cover, 14 is a U-shaped plate, 15 is a sliding groove, 16 is a support tube. Detailed implementation mode

[0026] As Figures 1 to 7 shown, a double-screw double-guide dust-proof clamp of the present invention includes a clamping block 1 and a workbench 2. The clamping block 1 can move relative to the workbench 2 to form a clamping surface between them. A gear structure 3 is arranged inside the clamping block 1. A crank 4 is arranged at the power input end of the gear structure 3. The gear structure 3 has two identical power output ends, which are symmetrically arranged relative to the middle of the clamping block 1. Screws 5 are arranged on both power output ends. The two screws 5 can rotate synchronously driven by the gear structure 3. Both of the two screws 5 are sleeved with guide tubes 6. One end of each of the two guide tubes 6 is fixed on the clamping block 1, and the other end of each of the two guide tubes 6 is a free end. Two guide sleeves 7 are installed on the workbench 2 at positions corresponding to the guide tubes 6. Each guide tube 6 can be inserted into the corresponding guide sleeve 7 in a matching manner. The guide sleeve 7 is used for guiding the guide tube 6. Support tubes 16 are correspondingly arranged along the axial extension direction of each guide sleeve 7. One end of each of the two support tubes 16 is fixedly arranged on the workbench 2, and the other end of each of the two support tubes 16 is provided with a nut mounting plate 8. Nuts 9 are fixedly arranged on the nut mounting plate 8 at positions corresponding to the two screws 5. The threaded end of each screw 5 can be inserted into the corresponding nut 9 in a matching manner. The crank 4 drives the double screws 5 to rotate synchronously through the gear structure 3, so that the clamping block 1 can move reciprocally relative to the workbench 2 to achieve the purpose of clamping.

[0027] The gear structure 3 includes a driving gear 31, an intermediate gear 32 and an output gear 33. The driving gear 31 is located in the middle of the inner cavity of the clamping block 1. Intermediate gears 32 are meshed on both sides of the driving gear 31. Output gears 33 are arranged outside both of the two intermediate gears 32. The driving gear 31, the intermediate gears 32 and the output gear 33 are covered in the inner cavity of the clamping block 1 by a cover plate 34. A main shaft 10 is arranged in the middle of the driving gear 31. One end of the main shaft 10 is fixed on the driving gear 31, and the other end of the main shaft 10 extends out of the cover plate 34 and is connected with the crank 4. The end of each screw 5 is correspondingly fixedly arranged in the middle of the output gear 33.

[0028] A gasket 35 is arranged between the cover plate 34 and the outer edge of the inner cavity of the clamping block 1.

[0029] The crank handle 4 is a flat steel structure with a long hole in the middle. The long hole of the crank handle 4 can be sleeved on the main shaft 10 in a matching manner. Buffer pads 11 are arranged on both sides of the main shaft 10. The buffer pads 11 are used to prevent the end of the long hole of the crank handle 4 from colliding with the main shaft 10 when the crank handle 4 moves radially relative to the main shaft 10 along the long hole direction. A handle 12 is fixedly arranged at the end of the crank handle 4.

[0030] Dust-proof covers 13 with one end open are sleeved on the screw rods 5 extending outside the nut mounting plate 8, and the open ends of the dust-proof covers 13 are fixedly arranged corresponding to the outside of the nuts 9, so that the screw rods 5 are in a closed chamber.

[0031] A U-shaped plate 14 is fixedly arranged on the lower side of the workbench 2. The bottom end and one side of the U-shaped plate 14 are fixedly arranged on the workbench 2. The nut mounting plate 8 is either fixed on the side plate of the U-shaped plate 14 or integrally formed with the side plate of the U-shaped plate 14.

[0032] U-shaped chutes 15 are symmetrically arranged at the part of the main shaft 10 sleeved with the crank handle 4. The long hole of the crank handle 4 is sleeved in the chutes 15 in a matching manner. The chutes 15 are formed by the cooperation of the main shaft 10 and the nuts connected to the ends of the main shaft 10, which is convenient for the crank handle 4 to be sleeved on the chutes 15.

[0033] The present invention adopts a double-screw structure, and the double-screw structure is located at the center of two groups of guide tubes and forms an integral body with the guiding device. Compared with the conventional single-screw structure with guiding on both sides in the middle, the space for clamping workpieces is more flexible. Since the double screws rotate synchronously and the clamping blocks move parallelly, the clamping force can be kept balanced at any position, the clamp runs more smoothly, and the workpiece is clamped more reliably.

[0034] The present invention adopts a double-guiding structure. The guide tubes are installed on the clamping blocks. When the clamp runs, it moves along with the clamping blocks. The guide sleeves are fixed on the side of the workbench. The guide tubes and the guide sleeves can be precisely matched. The two groups of guide tubes are respectively sleeved outside the screw rods, which play an accurate guiding role during the operation of the clamp, making the clamp run smoothly, improving the force efficiency and the service life of the device.

[0035] The present invention adopts a dust-proof design. The gear structure is in the inner cavity of the clamping block. The cavity has a cover plate, and there is a sealing gasket between the cover plate and the upper edge of the cavity of the clamping block, so as to ensure that the gear transmission structure is in a sealed and dust-free environment. There is a dust-proof cover design at the tail end of the screw rod to ensure that the screw rod runs in a sealed and dust-free environment. The middle guide tube and the guide sleeve are precisely matched to block environmental dust from entering the screw rod space.

[0036] The present invention adopts a variable-radius crank. A long groove is opened in the middle of the flat steel, which is stuck in the sliding groove of the main shaft and slides therein. When the crank is rotated, the main shaft is driven to rotate, and it can bear a relatively large torque. A handle is installed at one end of the crank. While holding the handle and rotating the crank, the radius centered on the main shaft can be changed at any time, so as to achieve the best matching of the clamping operation speed and torque. Rubber buffer pads are installed on both sides of the sliding groove of the main shaft. When the crank slides to the bottom and is about to approach the main shaft, it plays a buffering role and avoids the collision sound between metals.

[0037] The present invention adopts a gear transmission mechanism, which is located in the cavity of the clamping block. The middle driving gear is installed on the main shaft and rotates with the main shaft, driving the two transition gears on both sides. The two transition gears respectively drive the output gears on both sides, and the output gears on both sides are respectively installed with screws. Therefore, through the rotation of the middle main shaft, the synchronous rotation of the two screws on both sides is finally driven.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A double-screw double-guided dust-proof clamp, comprising a clamping block (1) and a workbench (2), wherein the clamping block (1) can move relative to the workbench (2) to form a clamping surface with the workbench (2), and is characterized in that, A gear structure (3) is arranged inside the clamping block (1). A crank (4) is arranged at the power input end of the gear structure (3). The gear structure (3) has two identical power output ends, which are symmetrically arranged relative to the middle of the clamping block (1). Screws (5) are arranged on both power output ends. Driven by the gear structure (3), the two screws (5) can rotate synchronously. Guide tubes (6) are sleeved on both screws (5). One end of each of the two guide tubes (6) is fixed on the clamping block (1), and the other end of each of the two guide tubes (6) is a free end. Two guide sleeves (7) are installed on the workbench (2) at positions corresponding to the guide tubes (6). Each guide tube (6) can be inserted into the corresponding guide sleeve (7) in a matching manner. The guide sleeves (7) are used for guiding the guide tubes (6). Support tubes (16) are correspondingly arranged along the axial extension direction of each guide sleeve (7). One end of each of the two support tubes (16) is fixedly arranged on the workbench (2), and the other end of each of the two support tubes (16) is provided with a nut mounting plate (8). Nuts (9) are fixedly arranged on the nut mounting plate (8) at positions corresponding to the two screws (5). The threaded end of each screw (5) can be inserted into the corresponding nut (9) in a matching manner. The crank (4) drives the two screws (5) to rotate synchronously through the gear structure (3), so that the clamping block (1) can reciprocate relative to the workbench (2) to achieve the purpose of clamping.

2. The double-screw double-guided dust-proof clamp according to claim 1, characterized in that, The gear structure (3) includes a driving gear (31), an intermediate gear (32) and an output gear (33). The driving gear (31) is located in the middle of the inner cavity of the clamping block (1). Intermediate gears (32) are meshed on both sides of the driving gear (31). Output gears (33) are arranged on the outer sides of the two intermediate gears (32). The driving gear (31), the intermediate gears (32) and the output gears (33) are covered in the inner cavity of the clamping block (1) by a cover plate (34). A main shaft (10) is arranged in the middle of the driving gear (31). One end of the main shaft (10) is fixed on the driving gear (31), and the other end of the main shaft (10) extends out of the cover plate (34) and is connected to the crank (4). The end of each screw (5) is correspondingly fixed in the middle of the output gear (33).

3. The double-screw double-guided dust-proof clamp according to claim 2, characterized in that, A gasket (35) is arranged between the cover plate (34) and the outer edge of the inner cavity of the clamping block (1).

4. A double-screw double-guided dust-proof clamp according to claim 2, characterized in that, The crank (4) is a flat steel structure with a long hole in the middle. The long hole of the crank (4) can be sleeved on the main shaft (10) in a matching manner. Buffer pads (11) are arranged on both sides of the main shaft (10). The buffer pads (11) are used to prevent the end of the long hole of the crank (4) from colliding with the main shaft (10) when the crank (4) moves radially relative to the main shaft (10) along the long hole direction. A handle (12) is fixedly arranged at the end of the crank (4).

5. A double-screw double-guided dust-proof clamp according to claim 3, characterized in that, A dust-proof cover (13) with an open end is sleeved on each screw rod (5) extending to the outside of the nut mounting plate (8), and the open end of the dust-proof cover (13) is fixedly arranged corresponding to the outside of the nut (9), so that the screw rod (5) is in a closed chamber.

6. The double-screw double-guided dust-proof clamp according to claim 5, characterized in that, A U-shaped plate (14) is fixedly arranged on the lower side of the workbench (2), the bottom end and one side of the U-shaped plate (14) are fixedly arranged on the workbench (2), and the nut mounting plate (8) is either fixed on the side plate of the U-shaped plate (14) or integrally formed with the side plate of the U-shaped plate (14).

7. A double-screw double-guided dust-proof clamp according to claim 4, characterized in that, U-shaped chutes (15) are symmetrically arranged at the part where the main shaft (10) is sleeved with the crank (4), and the long hole of the crank (4) is sleeved in the chute (15) in a matching manner.

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