A precision table clamp with adjustable clamping force

Abstract

The application belongs to the technical field of table tongs, and particularly relates to a precision table tong with adjustable clamping force, which comprises a main chuck, an auxiliary chuck and a base, the main chuck is fixedly connected with the base, the main chuck and the auxiliary chuck are oppositely arranged, the auxiliary chuck is slidably installed on the base, a pressing block is elastically installed in the base, a transmission rod is rotatably installed in the auxiliary chuck, a spiral groove is formed in the outer wall of the transmission rod, a guide block is fixedly installed in the auxiliary chuck, one end of the guide block extends into the spiral groove, one end of the transmission rod extends into the interior of the main chuck and is fixedly connected with a rotating ring, a transmission cylinder is rotatably installed in the main chuck, one end of the transmission cylinder extends into the interior of the rotating ring, and a worm wheel is fixedly installed on the outer wall of the transmission cylinder. Through the cooperation of the above structures, the labor of the workers can be saved, and the workpiece can be quickly clamped and locked.

Description

Technical Field

[0001] This invention belongs to the field of bench vise technology, specifically a precision bench vise with adjustable clamping force. Background Technology

[0002] The main function of a bench vise is to clamp workpieces for various machining operations. It can fix the workpiece and keep it stable on the workbench, preventing it from moving during machining. The jaws of the bench vise can be adjusted to accommodate workpieces of different sizes and shapes. At the same time, the bench vise can also adjust the position of the workpiece by rotating or translating it to perform machining operations such as drilling, milling, turning, and grinding.

[0003] However, the operation of bench vises using existing technology has certain limitations. Typically, one hand is needed to pre-fix the workpiece, while the other hand adjusts the jaw size by rotating the screw to clamp the workpiece. Due to the characteristics of the screw, this process can be time-consuming. Holding the workpiece with one hand while clamping it will cause significant physical exertion for the operator, especially during long periods of work. This operation method can easily lead to operator fatigue, thereby affecting work quality and efficiency.

[0004] Therefore, the present invention provides a precision bench vise with adjustable clamping force. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a precision bench vise with adjustable clamping force, including a main chuck, a secondary chuck, and a base. The main chuck is fixedly connected to the base, and the main chuck and the secondary chuck are arranged opposite to each other. The secondary chuck is slidably mounted on the base. The workpiece to be processed is placed between the main chuck and the secondary chuck, and the workpiece can be clamped by controlling the secondary chuck to slide toward the position of the main chuck.

[0007] The base has a top pressure block installed inside. The top pressure block is located between the main chuck and the auxiliary chuck. Before clamping the workpiece, the workpiece can be placed on top of the top pressure block to support it, effectively saving effort. Through the elastic setting, the position of the workpiece can be adjusted when the auxiliary chuck is about to clamp the workpiece.

[0008] The auxiliary chuck has a drive rod rotatably mounted inside, and a spiral groove is opened on the outer wall of the drive rod. A guide block is fixedly installed inside the auxiliary chuck, and one end of the guide block extends into the spiral groove. The bottom end of the auxiliary chuck is connected to the top end of the base through a slide rail. When the auxiliary chuck slides along the outer wall of the drive rod, the sliding trajectory of the auxiliary chuck can be limited.

[0009] The auxiliary chuck can be manually pulled towards the position of the main chuck. At this time, the guide block inside the auxiliary chuck can slide along the inside of the spiral groove. Since the movement trajectory of the auxiliary chuck is restricted, the transmission rod can rotate inside the auxiliary chuck. Similarly, the sliding of the auxiliary chuck can be restricted by restricting the rotation of the transmission rod.

[0010] One end of the transmission rod extends into the interior of the main chuck and is fixedly connected to a rotating ring. A transmission cylinder is rotatably mounted inside the main chuck, and one end of the transmission cylinder extends into the interior of the rotating ring.

[0011] When the secondary chuck slides on the base, the transmission rod will drive the rotating ring to rotate inside the main chuck. One end of the transmission cylinder extends into the interior of the rotating ring and is rotatably connected.

[0012] A worm gear is fixedly installed on the outer wall of the transmission cylinder, and a worm adapted to the worm gear is rotatably installed inside the main chuck. By rotating the worm, the worm gear can be driven to rotate. Due to the characteristics of the worm gear and worm, the transmission cylinder cannot rotate on its own and can only be controlled by the rotation of the worm. When the secondary chuck slides, the transmission rod drives the rotating ring to rotate, and at this time the rotating ring can rotate on the outer wall of the transmission cylinder.

[0013] The transmission cylinder is equipped with a snap-fit ​​assembly inside, which is used to snap the transmission cylinder and the rotating ring together.

[0014] The transmission cylinder and rotating ring can be connected by a snap-fit ​​assembly. The transmission cylinder can then drive the rotating ring to rotate synchronously. Similarly, the rotation of the transmission rod will also drive the transmission cylinder to rotate. However, with the cooperation of the worm gear and worm, the transmission rod cannot drive the rotating ring to rotate on the outer wall of the transmission cylinder. The transmission rod can only be controlled to rotate by the transmission cylinder. When the workpiece is placed on the top pressure block, the auxiliary chuck is first controlled to slide towards the position of the main chuck to pre-clamp the workpiece. Then, the transmission cylinder and rotating ring are snapped together by the snap-fit ​​assembly. By controlling the rotation of the worm, the worm gear is driven to rotate. At this time, the transmission cylinder can drive the rotating ring and the transmission rod to rotate. The auxiliary chuck can be further controlled to clamp the workpiece. Through the above process, compared with the existing technology, not only can the labor of the workers be saved, but the workpiece can also be clamped and locked quickly.

[0015] The snap-fit ​​assembly includes a receiving groove, a top pressure ball, a snap-fit ​​groove, and a slide rod. The receiving groove is opened inside the transmission cylinder, the top pressure ball is slidably installed in the receiving groove, the snap-fit ​​groove is opened inside the rotating ring, and the slide rod is slidably installed inside the transmission cylinder to push the top pressure ball into the snap-fit ​​groove.

[0016] The receiving groove penetrates the outer wall of the transmission cylinder, and the top pressure ball is located inside the receiving groove. The diameter of the openings at both ends of the receiving groove is smaller than the diameter of the top pressure ball. The top pressure ball can slide inside the receiving groove, but it cannot slide out of the receiving groove. No matter which side of the receiving groove the top pressure ball slides towards, one end of the top pressure ball will always be outside the transmission cylinder. Multiple slots are provided and arranged in a ring along the inside of the rotating ring. Multiple top pressure balls can be provided. The engagement between the transmission cylinder and the rotating ring can be completed by pushing the top pressure ball into the slot.

[0017] By pushing the slide rod, it slides inside the transmission cylinder toward the rotating ring. At this time, the slide rod can press the top pressure ball, pressing it toward the slot. Since there are gaps between the multiple slots, the rotating ring can be rotated by controlling the sliding of the secondary chuck, which makes it easier for the slide rod to push the top pressure ball into the slot. Then, the worm gear can be rotated to drive the worm wheel to rotate, controlling the transmission cylinder to drive the rotating ring to rotate. The self-locking mechanism can improve the stability of the secondary chuck in holding the workpiece.

[0018] When the workpiece is finished, pull the slide bar and it no longer obstructs the top pressure ball. Then slide the secondary chuck in the opposite direction, so that the transmission rod drives the rotating ring to rotate. The edge of the slot can then press the top pressure ball, pushing it back into the receiving groove. At this time, one end of the top pressure ball will protrude from the inner wall of the transmission cylinder.

[0019] A pressing block is fixedly installed at the end of the slide bar away from the rotating ring, and the top of the worm gear extends out of the outer wall of the main chuck and is fixedly installed with a knob.

[0020] The push-button design allows for easy control of the slide bar's movement, while the knob design allows for easy control of the worm gear's rotation.

[0021] The base has a sliding groove inside, and the top pressure block is slidably installed in the sliding groove. A top pressure spring is provided at the bottom of the top pressure block.

[0022] The top pressure spring is always in place to keep the top pressure block under pressure, so that it is located outside the base. The workpiece can be placed on top of the top pressure block for support, saving the labor intensity of the workers. By pressing the workpiece, the top pressure block can be moved downward to handle the clamping of the workpiece at multiple angles.

[0023] A top plate is slidably installed at the bottom of the sliding groove, and a cam is rotatably installed at the bottom of the top plate. A connecting rod is fixedly installed on the side wall of the cam, and the end of the connecting rod away from the cam extends out of the outer wall of the secondary clamp and is fixedly connected to a rotating block.

[0024] After the secondary chuck clamps the workpiece, the rotating block is controlled to rotate, which drives the cam to rotate through the connecting rod. By pressing the top plate against the cam's protrusion, the top plate slides upward inside the sliding groove, compressing the spring and thus increasing the pressure of the top block on the workpiece. This effectively reduces the phenomenon of slippage caused by excessive pressure when the worker is grinding the workpiece, further improving the efficiency of workpiece processing.

[0025] The secondary chuck has a storage slot inside, which is connected to the sliding slot.

[0026] The outer wall of the top pressure block is equipped with a sealing rubber layer to improve the sealing effect. The storage tank contains clean water, which can enter the sliding groove. By sliding the top pressure block downward, the water can be squeezed and flow into the storage tank. The water pressure can further improve the effect of the top pressure block on the workpiece.

[0027] The storage tank is equipped with a cross valve that opens by pressure deformation at one end near the sliding groove.

[0028] When the clean water is inside the sliding tank, pressing the top pressure block causes it to slide down, which in turn causes the top pressure spring to deform and squeeze the water. As the pressure increases, the cross valve can be opened, allowing the water to flow into the inner cavity of the storage tank. When the top pressure block is no longer under pressure, the top plate is pressed back down by the top pressure spring, and the cross valve can be opened again under the action of air pressure, allowing the clean water in this storage tank to re-enter the inner cavity of the sliding tank.

[0029] When the water in the storage tank is too abundant, the water in the sliding tank cannot pass through the cross valve, and the top pressure block cannot continue to slide down.

[0030] The top plate has an internal connecting groove, which is L-shaped, with one end facing the storage groove and the other end facing the bottom of the top plate.

[0031] When the top plate is at the bottom of the sliding groove, it does not obstruct the storage tank, allowing water in the sliding groove to enter. When the cam rotates and presses against the top plate, the top plate slides upward inside the sliding groove, blocking the connection between the sliding groove and the storage tank. Water in the sliding groove can no longer enter the storage tank and remains between the top plate and the pressing block. The pressing block can no longer press against the water, thus improving the pressing effect on the workpiece. After the workpiece is clamped, controlling the cam to rotate and press the top plate upwards blocks the pressing block from sliding down, further improving the pressing effect on the workpiece.

[0032] When the top plate slides to the bottom of the sliding groove, the clean water flowing into the bottom of the top plate can also be squeezed back into the storage tank through the connecting groove.

[0033] A sealing gasket is fixedly installed on the outer wall of the top plate, and the sealing gasket is located above the connecting groove. A sealing gasket is also installed on the outer wall of the bottom end of the top plate.

[0034] A sliding rod is provided at the bottom of the top plate, and a sealing gasket is provided on the outer wall of the bottom of the top plate. The sealing gaskets provided on the outer wall of the top plate and the outer wall of the sliding rod can improve the sealing effect between the sliding groove and the storage groove, and at the same time improve the performance of the above structure.

[0035] The beneficial effects of this invention are as follows:

[0036] 1. The precision bench vise with adjustable clamping force described in this invention pre-clamps the workpiece by placing it on the top pressure block and controlling the secondary chuck to slide towards the position of the main chuck. By pushing the slide rod, the top pressure ball is pushed into the slot. At this time, by rotating the worm gear to drive the rotating ring to rotate, the secondary chuck can be further controlled to clamp the workpiece. Compared with the prior art, the above process not only saves the labor of the workers, but also allows for quick clamping and locking of the workpiece.

[0037] 2. The precision bench vise with adjustable clamping force described in this invention controls the rotation of the cam to press the top plate upward, which can block the connection between the sliding groove and the storage groove, preventing water inside the sliding groove from entering the storage groove, thereby improving the pressing effect of the top plate on the workpiece. After the workpiece is clamped, controlling the rotation of the cam to press the top plate upward can stop the top plate from sliding down, thereby improving the pressing effect on the workpiece. Attached Figure Description

[0038] The invention will now be further described with reference to the accompanying drawings.

[0039] Figure 1 This is a perspective view of the present invention;

[0040] Figure 2 This is a schematic diagram of the transmission rod in this invention;

[0041] Figure 3 In this invention Figure 2 Enlarged view of point A in the image;

[0042] Figure 4 This is a schematic diagram of the top pressure block in this invention;

[0043] Figure 5 This is a schematic diagram of the worm gear structure in this invention;

[0044] Figure 6 This is a schematic diagram of the knob structure in this invention;

[0045] Figure 7 In this invention Figure 6 Enlarged view of point B in the image;

[0046] Figure 8 This is a schematic diagram of the storage slot structure in this invention;

[0047] Figure 9 In this invention Figure 8 Enlarged view of point C in the image.

[0048] In the diagram: 1. Main chuck; 2. Secondary chuck; 3. Base; 4. Pressing block; 5. Knob; 6. Rotating block; 7. Top pressure block; 8. Transmission rod; 9. Spiral groove; 10. Guide block; 11. Rotating ring; 12. Worm gear; 13. Worm; 14. Sliding groove; 15. Transmission cylinder; 16. Slide rod; 17. Receiving groove; 18. Top pressure ball; 19. Slot; 20. Sealing gasket; 21. Top pressure spring; 22. Top plate; 23. Cam; 24. Connecting rod; 25. Storage groove; 26. Connecting groove; 27. Cross valve disc. Detailed Implementation

[0049] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0050] Example 1: As Figures 1 to 7 As shown in the figure, a precision bench vise with adjustable clamping force according to an embodiment of the present invention includes a main chuck 1, a secondary chuck 2 and a base 3. The main chuck 1 and the base 3 are fixedly connected. The main chuck 1 and the secondary chuck 2 are arranged opposite to each other. The secondary chuck 2 is slidably mounted on the base 3. The workpiece to be processed is placed between the main chuck 1 and the secondary chuck 2. By controlling the secondary chuck 2 to slide toward the position of the main chuck 1, the workpiece can be clamped.

[0051] The base 3 has a top pressure block 7 installed inside. The top pressure block 7 is located between the main chuck 1 and the auxiliary chuck 2. Before clamping the workpiece, the workpiece can be placed on top of the top pressure block 7 to support the workpiece, effectively saving effort. Through the elastic setting, the position of the workpiece can be adjusted when the auxiliary chuck 2 is about to clamp the workpiece.

[0052] The auxiliary chuck 2 has a transmission rod 8 rotatably mounted inside. The outer wall of the transmission rod 8 has a spiral groove 9. The auxiliary chuck 2 has a guide block 10 fixedly mounted inside. One end of the guide block 10 extends into the spiral groove 9. The bottom end of the auxiliary chuck 2 is connected to the top end of the base 3 through a slide rail. When the auxiliary chuck 2 slides along the outer wall of the transmission rod 8, the sliding trajectory of the auxiliary chuck 2 can be limited.

[0053] The auxiliary chuck 2 can be manually pulled to slide towards the position of the main chuck 1. At this time, the guide block 10 inside the auxiliary chuck 2 can slide along the inside of the spiral groove 9. Since the movement trajectory of the auxiliary chuck 2 is restricted, the transmission rod 8 can rotate inside the auxiliary chuck 2. Similarly, the sliding of the auxiliary chuck 2 can be restricted by restricting the rotation of the transmission rod 8.

[0054] One end of the transmission rod 8 extends into the interior of the main chuck 1 and is fixedly connected to a rotating ring 11. A transmission cylinder 15 is rotatably mounted inside the main chuck 1, and one end of the transmission cylinder 15 extends into the interior of the rotating ring 11.

[0055] When the secondary chuck 2 slides on the base 3, the transmission rod 8 will drive the rotating ring 11 to rotate inside the main chuck 1. One end of the transmission cylinder 15 extends into the interior of the rotating ring 11 and is rotatably connected.

[0056] A worm gear 12 is fixedly installed on the outer wall of the transmission cylinder 15. A worm 13 adapted to the worm gear 12 is rotatably installed inside the main chuck 1. By rotating the worm 13, the worm gear 12 can be driven to rotate. Due to the characteristics of the worm gear 12 and the worm 13, the transmission cylinder 15 cannot rotate on its own and can only be controlled by the rotation of the worm 13. When the auxiliary chuck 2 slides, the transmission rod 8 drives the rotating ring 11 to rotate. At this time, the rotating ring 11 can rotate on the outer wall of the transmission cylinder 15.

[0057] The transmission cylinder 15 is provided with a snap-fit ​​assembly for snapping the transmission cylinder 15 with the rotating ring 11.

[0058] The transmission cylinder 15 and the rotating ring 11 can be connected by the set snap-fit ​​assembly. At this time, the transmission cylinder 15 can drive the rotating ring 11 to rotate synchronously. Similarly, the rotation of the transmission rod 8 will also drive the transmission cylinder 15 to rotate. However, with the cooperation of the worm gear 12 and the worm 13, the transmission rod 8 cannot drive the rotating ring 11 to rotate on the outer wall of the transmission cylinder 15. The transmission rod 8 can only be controlled to rotate by the transmission cylinder 15. When the workpiece is placed on the top pressure block 7, the auxiliary chuck 2 is first controlled to slide towards the position of the main chuck 1 to pre-clamp the workpiece. Then, the transmission cylinder 15 and the rotating ring 11 are snapped together by the snap-fit ​​assembly. Then, by controlling the rotation of the worm 13, the worm gear 12 is driven to rotate. At this time, the transmission cylinder 15 can drive the rotating ring 11 and the transmission rod 8 to rotate. The auxiliary chuck 2 can be further controlled to clamp the workpiece. Through the above process, compared with the prior art, not only can the strength of the workers be saved, but the workpiece can also be clamped and locked quickly.

[0059] The snap-fit ​​assembly includes a receiving groove 17, a top pressure ball 18, a locking groove 19, and a sliding rod 16. The receiving groove 17 is opened inside the transmission cylinder 15. The top pressure ball 18 is slidably installed in the receiving groove 17. The locking groove 19 is opened inside the rotating ring 11. The sliding rod 16 is slidably installed inside the transmission cylinder 15 and is used to push the top pressure ball 18 into the locking groove 19.

[0060] The receiving groove 17 penetrates the outer wall of the transmission cylinder 15. The top pressure ball 18 is located inside the receiving groove 17. The diameter of the openings at both ends of the receiving groove 17 is smaller than the diameter of the top pressure ball 18. The top pressure ball 18 can slide inside the receiving groove 17, but cannot slide out of the receiving groove 17. No matter which side of the receiving groove 17 the top pressure ball 18 slides towards, one end of the top pressure ball 18 will always be outside the transmission cylinder 15. Multiple slots 19 are provided and arranged in a ring along the inside of the rotating ring 11. Multiple top pressure balls 18 can be provided. The engagement between the transmission cylinder 15 and the rotating ring 11 can be completed by pushing the top pressure ball 18 into the slot 19.

[0061] By pushing the slide rod 16, it slides inside the transmission cylinder 15 toward the rotating ring 11. At this time, the slide rod 16 can press the top pressure ball 18 toward the position of the slot 19. Since there are gaps between the multiple slots 19, the rotating ring 11 can be rotated by controlling the sliding of the secondary chuck 2, so that the slide rod 16 can push the top pressure ball 18 into the slot 19. At this time, the worm gear 13 can be rotated to drive the worm wheel 12 to rotate, and the transmission cylinder 15 can be controlled to drive the rotating ring 11 to rotate. The stability of the secondary chuck 2 in clamping the workpiece can be improved by the self-locking method.

[0062] When the workpiece is finished, pull the slide bar 16 and it no longer obstructs the top pressure ball 18. Then slide the secondary chuck 2 in the opposite direction, so that the transmission rod 8 drives the rotating ring 11 to rotate. The edge of the slot 19 can then press the top pressure ball 18, pushing the top pressure ball 18 back into the receiving slot 17. At this time, one end of the top pressure ball 18 will protrude from the inner wall of the transmission cylinder 15, realizing the quick unlocking of the workpiece by the secondary chuck 2.

[0063] A pressing block 4 is fixedly installed at the end of the slide bar 16 away from the rotating ring 11, and the top of the worm gear 13 extends out of the outer wall of the main chuck 1 and is fixedly installed with a knob 5.

[0064] The sliding block 4 allows for easy control of the sliding rod 16, while the knob 5 allows for easy control of the rotation of the worm gear 13.

[0065] The base 3 has a sliding groove 14 inside, and the top pressure block 7 is slidably installed in the sliding groove 14. The bottom end of the top pressure block 7 is provided with a top pressure spring 21.

[0066] The top pressure spring 21 always maintains pressure on the top pressure block 7, keeping it outside the base 3. The workpiece can be placed on top of the top pressure block 7 for support, saving the workload of the workers. By pressing the workpiece, the top pressure block 7 can be moved downward to handle the clamping of the workpiece at multiple angles.

[0067] A top plate 22 is slidably installed at the bottom end of the sliding groove 14, and a cam 23 is rotatably installed at the bottom end of the top plate 22. A connecting rod 24 is fixedly installed on the side wall of the cam 23. The end of the connecting rod 24 away from the cam 23 extends out of the outer wall of the secondary clamp 2 and is fixedly connected to the rotating block 6.

[0068] After the secondary chuck 2 clamps the workpiece, the control rotating block 6 rotates, which drives the cam 23 to rotate through the connecting rod 24. By pressing the top plate 22 with the protruding position of the cam 23, the top plate 22 slides upward inside the sliding groove 14, which can compress the spring, thereby increasing the pressing force of the top pressure block 7 on the workpiece. This can effectively reduce the phenomenon of workpiece slippage caused by excessive pressure when the operator is grinding the workpiece, and further improve the efficiency of workpiece processing.

[0069] Example 2: Figures 8 to 9 As shown in Example 1, another embodiment of the present invention is as follows:

[0070] The secondary chuck 2 has a storage slot 25 inside, which is connected to the sliding slot 14.

[0071] The outer wall of the top pressure block 7 is provided with a sealing rubber layer to improve the sealing effect. The storage tank 25 contains clean water, which can enter the sliding groove 14. By sliding the top pressure block 7 downward, the water can be squeezed and flow into the storage tank 25. The water pressure can further improve the effect of the top pressure block 7 in pressing the workpiece.

[0072] A cross valve 27, which opens by pressure deformation, is provided at one end of the storage tank 25 near the sliding groove 14.

[0073] When the clean water is inside the sliding groove 14, pressing the top pressure block 7 causes it to slide down and deform the top pressure spring 21, which can also squeeze the water. As the pressure increases, the cross valve 27 can be opened, allowing the water to flow into the inner cavity of the storage tank 25. When the top pressure block 7 is no longer under pressure, the top plate 22 is pressed back down by the top pressure spring 21, and the cross valve 27 can be opened again under the action of air pressure, allowing the clean water in the storage tank 25 to re-enter the inner cavity of the sliding groove 14.

[0074] When the water in the storage tank 25 is too abundant, the water in the sliding tank 14 cannot pass through the cross valve 27, and the top pressure block 7 cannot continue to slide down.

[0075] The top plate 22 has a connecting groove 26 inside. The connecting groove 26 is L-shaped, with one end facing the storage groove 25 and the other end facing the bottom of the top plate 22.

[0076] When the top plate 22 is at the bottom of the sliding groove 14, it will not block the storage groove 25. At this time, the clean water in the sliding groove 14 can enter the storage groove 25. When the cam 23 rotates and presses the top plate 22, the top plate 22 slides upward inside the sliding groove 14, which can block the connection between the sliding groove 14 and the storage groove 25. At this time, the clean water inside the sliding groove 14 cannot enter the storage groove 25 and can only be between the top plate 22 and the pressing block 7. At this time, the pressing block 7 can no longer press the water, so the pressing effect of the pressing block 7 on the workpiece can be improved. After the workpiece is clamped, by controlling the rotation of the cam 23, the top plate 22 is pressed upward to block the pressing block 7 from sliding down, thereby improving the pressing effect on the workpiece.

[0077] When the top plate 22 slides to the bottom of the sliding groove 14, the clean water flowing into the bottom of the top plate 22 can also be squeezed back into the storage groove 25 through the connecting groove 26.

[0078] A sealing gasket 20 is fixedly installed on the outer wall of the top plate 22. The sealing gasket 20 is located above the connecting groove 26. A sealing gasket 20 is also provided on the bottom outer wall of the top plate 22.

[0079] A sliding rod is provided at the bottom end of the top plate 22. The sealing gasket 20 provided on the outer wall of the bottom end of the top plate 22 is provided on the outer wall of the sliding rod. The sealing gasket 20 provided on the outer wall of the top end of the top plate 22 and the outer wall of the sliding rod can improve the sealing effect between the sliding groove 14 and the storage groove 25, and at the same time improve the use effect of the above structure.

[0080] Working principle: When the workpiece is placed on the top pressure block 7, the auxiliary chuck 2 is first controlled to slide towards the position of the main chuck 1 to pre-clamp the workpiece. By pushing the slide rod 16, it slides towards the rotating ring 11 inside the transmission cylinder 15, pressing the top pressure ball 18 towards the position of the slot 19 and pushing the top pressure ball 18 into the slot 19. At this time, the worm gear 13 is rotated to drive the worm wheel 12 to rotate, controlling the transmission cylinder 15 to drive the rotating ring 11 to rotate. At this time, the transmission cylinder 15 can drive the rotating ring 11 and the transmission rod 8 to rotate, which can further control the auxiliary chuck 2 to clamp the workpiece. Through the above process, compared with the existing technology, it can not only save the strength of the workers, but also quickly clamp and lock the workpiece.

[0081] By controlling the rotation of the cam 23, the top plate 22 is pressed against the top plate 22. At this time, the top plate 22 slides upward inside the sliding groove 14, which can block the connection between the sliding groove 14 and the storage groove 25. At this time, the water inside the sliding groove 14 cannot enter the storage groove 25. Located between the top plate 22 and the pressing block 7, the pressing effect of the pressing block 7 on the workpiece can be improved. After the workpiece is clamped, by controlling the rotation of the cam 23, the top plate 22 is pressed upward to block the pressing block 7 from sliding down, thereby improving the pressing effect on the workpiece.

[0082] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0083] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0084] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision bench vise with adjustable clamping force, characterized in that: It includes a main chuck (1), a secondary chuck (2) and a base (3). The main chuck (1) is fixedly connected to the base (3). The main chuck (1) and the secondary chuck (2) are arranged opposite to each other. The secondary chuck (2) is slidably mounted on the base (3). The base (3) is elastically fitted with a top pressure block (7), the auxiliary clamp (2) is rotatably fitted with a transmission rod (8), the outer wall of the transmission rod (8) is provided with a spiral groove (9), the auxiliary clamp (2) is fixedly fitted with a guide block (10), one end of the guide block (10) extends into the spiral groove (9); One end of the transmission rod (8) extends into the interior of the main chuck (1) and is fixedly connected to a rotating ring (11). A transmission cylinder (15) is rotatably installed inside the main chuck (1), and one end of the transmission cylinder (15) extends into the interior of the rotating ring (11). The outer wall of the transmission cylinder (15) is fixedly installed with a worm gear (12), and the main chuck (1) is rotatably installed with a worm (13) that is compatible with the worm gear (12). The transmission cylinder (15) is provided with a snap-fit ​​assembly inside, which is used to snap the transmission cylinder (15) and the rotating ring (11); The base (3) has a sliding groove (14) inside, and the top pressure block (7) is slidably installed in the sliding groove (14). The bottom end of the top pressure block (7) is provided with a top pressure spring (21). A top plate (22) is slidably installed at the bottom end of the sliding groove (14), and a cam (23) is rotatably installed at the bottom end of the top plate (22). A connecting rod (24) is fixedly installed on the side wall of the cam (23). The end of the connecting rod (24) away from the cam (23) extends out of the outer wall of the secondary clamp (2) and is fixedly connected to a rotating block (6). The sub-clamp (2) has a storage slot (25) inside, and the storage slot (25) is connected to the sliding slot (14); The storage tank (25) is provided with a cross valve (27) that opens by pressure deformation at one end near the sliding groove (14).

2. The precision bench vise with adjustable clamping force according to claim 1, characterized in that: The snap-fit ​​assembly includes a receiving groove (17), a top pressure ball (18), a snap-fit ​​groove (19), and a sliding rod (16). The receiving groove (17) is opened inside the transmission cylinder (15). The top pressure ball (18) is slidably installed in the receiving groove (17). The snap-fit ​​groove (19) is opened inside the rotating ring (11). The sliding rod (16) is slidably installed inside the transmission cylinder (15) for pushing the top pressure ball (18) into the snap-fit ​​groove (19).

3. A precision bench vise with adjustable clamping force according to claim 2, characterized in that: A pressing block (4) is fixedly installed at the end of the slide bar (16) away from the rotating ring (11), and the top end of the worm (13) extends out of the outer wall of the main chuck (1) and is fixedly installed with a knob (5).

4. A precision bench vise with adjustable clamping force according to claim 3, characterized in that: The top plate (22) has a connecting groove (26) inside. The connecting groove (26) is L-shaped, with one end facing the storage groove (25) and the other end facing the bottom of the top plate (22).

5. A precision bench vise with adjustable clamping force according to claim 4, characterized in that: A sealing gasket (20) is fixedly installed on the outer wall of the top plate (22). The sealing gasket (20) is located above the connecting groove (26). A sealing gasket (20) is also provided on the bottom outer wall of the top plate (22).

Images