A clamp and a clamping method thereof

Abstract

The present application relates to the technical field of clamping forceps, and particularly relates to a clamping forceps and a clamping method thereof. The present application comprises a guide rail, a fixed forceps body, a first movable forceps body and a first locking assembly. The guide rail comprises an upper flat plate, a lower flat plate and a vertical plate, the vertical plate is fixedly connected with the upper flat plate and the lower flat plate at both ends to be horizontally arranged in the shape of an I-beam, the fixed forceps body is fixedly installed at one end of the top of the upper flat plate, and the first movable forceps body is slidably installed on the upper flat plate along the length direction of the upper flat plate. A ratchet strip extending along the length direction of the lower flat plate is fixedly installed on the top surface of the lower flat plate, and the first locking assembly comprises a pawl, the pawl is hinged to the bottom of the first movable forceps body, and the pawl can be clamped with any one tooth on the ratchet strip. The first movable forceps body is slidably installed on the guide rail, and the pawl is clamped with the ratchet strip, so that the first movable forceps body is quickly moved to the target position, the labor intensity of the operator is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of clamping pliers technology, and more particularly to a clamping pliers and its clamping method. Background Technology

[0002] Clamping pliers, as a basic industrial tool for clamping, fixing and positioning workpieces, are widely used in many industrial fields such as machining, welding assembly, metallurgy, and power systems. They are an important tool for ensuring production and processing accuracy and operational efficiency.

[0003] Traditional clamps typically consist of a fixed clamp body, a guide rail, a guide nut, a lead screw, and a movable clamp body. The movable clamp body slides into the fixed clamp body via the guide rail. The lead screw is rotatably mounted on the movable clamp body and engages with a lead screw nut inside the fixed clamp body. Its working principle is as follows: by cranking a handle, the lead screw rotates, which in turn moves the movable clamp body relative to the fixed clamp body along the direction of the guide rail, thus completing the clamping and releasing process of the workpiece.

[0004] Existing clamping pliers require continuous cranking of the handle to rotate the lead screw when clamping workpieces of different sizes. This drives the movable clamp body closer to or away from the fixed clamp body, switching between clamping and releasing positions. Because the lead screw has a small lead and dense pitch, when the workpieces to be clamped vary significantly in size, the operator must manually crank the handle multiple times to adjust the movable clamp body to the target position. This process not only significantly increases the operator's workload but also reduces the overall operating efficiency of the clamping pliers.

[0005] Therefore, there is an urgent need for a clamping pliers that can move the movable jaw quickly, in order to reduce the labor intensity of operators and improve the clamping efficiency of the clamping pliers. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a clamping pliers and a clamping method thereof, which solves the technical problem that when existing clamping pliers are used to adapt to workpieces of different specifications, the lead screw needs to be rotated many times to drive the movable clamp body to move to the target position, resulting in high labor intensity for operators and low operating efficiency of the clamping pliers.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0010] On one hand, the present invention provides a clamping pliers, including a guide rail, a fixed clamping body, a first movable clamping body, and a first locking assembly; the guide rail includes an upper plate, a lower plate, and a vertical plate, the two ends of the vertical plate being fixedly connected to the upper plate and the lower plate respectively in a horizontally arranged I-shape; the fixed clamping body is fixedly installed at one end of the top of the upper plate; the first movable clamping body is slidably installed on the upper plate along its length direction, for cooperating with the fixed clamping body to clamp or release the workpiece; a ratchet rack extending along its own length direction is fixedly installed on the top surface of the lower plate; the first locking assembly includes a pawl and an elastic element; the pawl is hinged to the bottom of the first movable clamping body, and the pawl can engage with any tooth on the ratchet rack to lock the first movable clamping body; the elastic element is located between the pawl and the first movable clamping body, and its two ends are fixedly connected to the pawl and the first movable clamping body respectively, to provide a rebound force and a buffer force for the pawl.

[0011] Preferably, the pawl has a mounting groove on its outer wall facing the first movable clamp body, and the end of the elastic member away from the first movable clamp body is fixedly connected to the mounting groove.

[0012] Preferably, there are multiple elastic elements, and the multiple elastic elements are spaced apart along the width direction of the guide rail.

[0013] Preferably, the first locking component further includes a paddle; the paddle is fixedly installed at the end of the pawl away from the ratchet rack, and the paddle can drive the pawl to rotate about the hinge axis in a direction away from the ratchet rack, so that the pawl disengages from the ratchet rack.

[0014] Preferably, it further includes a second locking assembly; the second locking assembly includes a first threaded rod, a connecting sleeve, a locking rod, and a nut; the upper plate has a first elongated hole along its own length, and the vertical plate has a second elongated hole along its own length, the first elongated hole and the second elongated hole are connected; the first threaded rod extends vertically downward and passes through the first movable clamp and the first elongated hole and is placed in the second elongated hole, and the first threaded rod is screwed to the first movable clamp; the connecting sleeve is perpendicularly connected to the first threaded rod; the locking rod has a thread in the middle and is screwed to the connecting sleeve; the two ends of the locking rod extend out from the two ends of the connecting sleeve; the nut is placed on the top of the first movable clamp and is screwed to the first threaded rod; the top inner wall of the second elongated hole has multiple slots along its own length; rotating the nut can drive the first threaded rod, the connecting sleeve, and the locking rod to move vertically along the axis of the first threaded rod simultaneously, so that the locking rod is engaged in or disengaged from any of the slots, thereby locking or unlocking the first movable clamp for a second time.

[0015] Preferably, the second locking assembly further includes two guide plates; both guide plates are vertically fixedly installed at the bottom of the first movable clamp body, and the two guide plates are symmetrically arranged about the axis of the connecting sleeve and located in the first elongated hole and the second elongated hole; the opposite sidewalls of the two guide plates can fit against the connecting sleeve to guide the movement trajectory of the connecting sleeve and the first threaded rod.

[0016] Preferably, the assembly further includes a fine-tuning component, which comprises a second movable clamping body, a second threaded rod, and a rocker arm. The second movable clamping body is positioned between the fixed clamping body and the first movable clamping body. One end of the second threaded rod passes horizontally through the fixed clamping body and is rotatably connected to the side wall of the second movable clamping body away from the first movable clamping body. The other end of the second threaded rod is vertically fixedly connected to the rocker arm, and the second threaded rod is screwed to the fixed clamping body. Shaking the rocker arm can drive the second threaded rod to rotate, thereby causing the second movable clamping body to move along its own axis toward the first movable clamping body, so as to further cooperate with the first movable clamping body to clamp the workpiece.

[0017] Preferably, the fine-tuning assembly further includes two guide rods; both guide rods are horizontally arranged and symmetrically arranged about the axis of the second threaded rod; one end of each guide rod passes through the fixed clamp body and is fixedly connected to the side of the second movable clamp body away from the first movable clamp body, and the other end is placed outside the fixed clamp body to guide the movement trajectory of the second movable clamp body.

[0018] Preferably, it further includes a base and a rotating assembly; the base can be placed horizontally on the worktable; the rotating assembly includes a housing, a worm gear, a worm, a rotating shaft, and a drive rod. The bottom end of the housing is fixedly installed on the top of the base. The rotating shaft is vertically arranged, with one end rotatably connected to the inner bottom wall of the housing, and the other end passing through the housing and fixedly connected to the bottom of the lower plate. The worm gear is fixedly sleeved on the rotating shaft and coaxially arranged with the rotating shaft. The worm is horizontally arranged and meshes with the worm gear. The drive rod passes through the housing and the worm and is rotatably connected to the housing, and is fixedly connected to the worm, for driving the worm to rotate, so that the worm gear and the rotating shaft rotate simultaneously around their own axes, thereby driving the guide rail to rotate horizontally to any angle.

[0019] On the other hand, the present invention provides a clamping method for clamping a workpiece using the clamping pliers described above, comprising the following steps:

[0020] S1: Slide the first movable clamp body onto the upper plate, place the workpiece on the upper plate, and make the workpiece fit against the fixed clamp body;

[0021] S2: Push the first movable clamping body toward the fixed clamping body, so that the first movable clamping body and the fixed clamping body cooperate to clamp the workpiece, and at the same time the pawl engages with the ratchet rack to lock the position of the first movable clamping body, thus completing the clamping of the workpiece;

[0022] S3: When it is necessary to release the workpiece, push the first movable clamp body to move away from the fixed clamp body to the designated position to release the workpiece.

[0023] (III) Beneficial Effects

[0024] The beneficial effects of this invention are:

[0025] The present invention provides a clamping pliers and a clamping method thereof, wherein a first movable clamping body is slidably mounted on an I-shaped guide rail, which enables the first movable clamping body to move quickly to the target position without the need for a lead screw to drive it. Simultaneously, by setting a ratchet rack on the lower plate and installing a pawl at the bottom of the first movable clamp, the pawl can engage with any tooth on the ratchet rack, allowing the first movable clamp to quickly lock after moving to the target position. Furthermore, an elastic element is installed between the pawl and the first movable clamp, providing constant rebound and buffering force to the pawl. This ensures a tight engagement between the pawl and the ratchet rack, preventing loosening after locking, while also providing a buffering effect during engagement and disengagement, reducing component wear, extending the clamp's service life, and guaranteeing stable workpiece clamping when the first movable clamp and the fixed clamp need to be clamped. Compared to the existing technology where a lead screw rotates multiple times to drive the movable clamp to the target position, the clamp of this invention can quickly push the first movable clamp to the target position when clamping workpieces of various sizes, significantly shortening the preparation time before clamping, significantly reducing the operator's workload, making clamping and releasing operations for workpieces of various sizes more convenient, and improving the overall operating efficiency of the clamp. Meanwhile, the pawl can engage with any tooth on the ratchet rack, enabling the first movable clamping body to be quickly locked in any position, effectively preventing the first movable clamping body from shifting due to force during workpiece clamping and ensuring the stability of workpiece clamping. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a clamping pliers and clamping method of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall three-dimensional structure of a clamping pliers and clamping method of the present invention from another direction.

[0028] Figure 3 This is a cross-sectional structural diagram of a clamping pliers and clamping method of the present invention;

[0029] Figure 4 This is a schematic diagram of the overall three-dimensional structure of the guide rail of a clamping plier and clamping method according to the present invention;

[0030] Figure 5 This is a three-dimensional structural diagram of the first movable clamp body, the first locking component, and the second locking component of a clamping pliers and clamping method of the present invention.

[0031] Figure 6 This is a schematic diagram of the overall three-dimensional structure of the first movable clamp body, the first locking component, and the second locking component of a clamping pliers and clamping method of the present invention from another direction.

[0032] Figure 7 This is a schematic diagram of the overall three-dimensional structure of a clamping pliers and clamping method of the present invention when clamping a workpiece;

[0033] Figure 8 This is a schematic diagram of the overall three-dimensional structure of a clamping pliers and clamping method of the present invention when unlocking the first movable clamping body;

[0034] Figure 9 This is a three-dimensional disassembly diagram of the rotating component of a clamping pliers and clamping method according to the present invention.

[0035] [Explanation of Labels in the Attached Image]

[0036] 1: Guide rail; 11: Upper plate; 111: First elongated hole; 12: Lower plate; 13: Vertical plate; 131: Second elongated hole; 132: Slot; 2: Fixed clamp body; 3: First movable clamp body; 4: First locking assembly; 41: Pawl; 42: Paddle; 43: Elastic element; 5: Ratchet; 6: Second locking assembly; 61: First threaded rod; 62: Connecting sleeve; 63: Locking rod; 64: Nut; 65: Guide plate; 7: Fine adjustment assembly; 71: Second movable clamp body; 72: Second threaded rod; 73: Rocker arm; 74: Guide rod; 8: Base; 9: Rotating assembly; 91: Housing; 92: Worm gear; 93: Worm; 94: Rotating shaft; 95: Drive rod; 10: Workpiece. Detailed Implementation

[0037] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0038] Example 1

[0039] A clamping pliers according to this embodiment includes a guide rail 1, a fixed clamping body 2, a first movable clamping body 3, and a first locking component 4.

[0040] Specifically, such as Figures 1-2As shown, the guide rail 1 includes an upper plate 11, a lower plate 12, and a vertical plate 13. The two ends of the vertical plate 13 are fixedly connected to the upper plate 11 and the lower plate 12, respectively. The upper plate 11, the vertical plate 13, and the lower plate 12 are connected in a horizontally arranged guide rail 1 with an I-shaped cross section. The fixed clamp body 2 is fixedly installed at one end of the top of the upper plate 11. The first movable clamp body 3 is slidably installed on the upper plate 11 along the length direction of the upper plate 11 and is used to cooperate with the fixed clamp body 2 to clamp or release the workpiece 10. A ratchet rack 5 extending along its length is fixedly mounted on the top surface of the lower plate 12. The teeth on the ratchet rack 5 are all angled upwards towards the fixed clamping body 2. The first locking assembly 4 includes a pawl 41 and an elastic element 43. The pawl 41 is hinged to the bottom of the first movable clamping body 3 and is angled downwards away from the fixed clamping body 2. The pawl 41 can engage with any tooth on the ratchet rack 5 to lock the first movable clamping body 3, preventing it from sliding on the guide rail 1 away from the fixed clamping body 2 when the pawl 41 is engaged with the ratchet rack 5. The elastic element 43 is located between the pawl 41 and the first movable clamping body 3, and its two ends are fixedly connected to the pawl 41 and the first movable clamping body 3 respectively, providing rebound force and buffering force to the pawl 41. When the pawl 41 engages with the ratchet rack 5, the elastic element 43 provides a continuous rebound force to the pawl 41, ensuring that the pawl 41 and the ratchet rack 5 always maintain a reliable engagement, preventing the first moving clamp 3 from loosening during the clamping of the workpiece 10, and improving the stability and reliability of the locking.

[0041] By setting an I-shaped guide rail 1, the first movable clamp body 3 is slidably mounted on the guide rail 1, which allows the first movable clamp body 3 to move quickly to the target position without the need for a lead screw rotation drive. Simultaneously, by setting a ratchet rack 5 on the lower plate 12 and installing a pawl 41 at the bottom of the first movable clamp body 3, the pawl 41 can engage with any tooth on the ratchet rack 5, allowing the first movable clamp body 3 to quickly lock after moving to the target position. Furthermore, an elastic element 43 is set between the pawl 41 and the first movable clamp body 3, which can always provide rebound force and buffering force to the pawl 41. This ensures that the pawl 41 and the ratchet rack 5 are tightly engaged, preventing loosening after locking, while also providing a buffering effect during the engagement and disengagement of the pawl 41 and the ratchet rack 5, reducing component wear and extending service life. The extended service life of the clamping jaws ensures that the first movable jaw 3 and the fixed jaw 2 can stably clamp the workpiece 10 when needed. Compared to the prior art where the screw rotates multiple times to drive the movable jaw to the target position, the clamping jaws of this embodiment can quickly push the first movable jaw 3 to the target position when clamping workpieces 10 of various specifications. This significantly shortens the preparation time before clamping the workpiece 10, significantly reduces the labor intensity of the operator, and makes clamping and releasing operations of workpieces 10 of various specifications more convenient, improving the overall operating efficiency of the clamping jaws. At the same time, the pawl 41 can engage with any tooth on the ratchet rack 5, which can quickly lock the first movable jaw 3 at any position to effectively prevent the first movable jaw 3 from shifting due to force during the clamping of the workpiece 10, ensuring the stability of the workpiece 10 clamping.

[0042] Furthermore, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the pawl 41 has an installation groove on the outer wall facing the first movable clamp 3. The end of the elastic member 43 away from the first movable clamp 3 is fixedly connected to the installation groove so as to provide a stable installation position between the elastic member 43 and the pawl 41 and ensure stable assembly of the elastic member.

[0043] Furthermore, such as Figure 5 As shown, multiple elastic elements 43 are provided, and the multiple elastic elements 43 are spaced apart along the width direction of the guide rail 1 to form one or more rows. This can make the rebound force and buffer force on the pawl 41 more uniform, avoid the problem of the pawl 41 tilting and unstable engagement caused by uneven force on a single elastic element 43, and further improve the reliability of the engagement between the pawl 41 and the ratchet rack 5.

[0044] Furthermore, such as Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the first locking assembly 4 also includes a paddle 42. The paddle 42 is fixedly installed at the end of the pawl 41 away from the ratchet rack 5. The paddle 42 can drive the pawl 41 to rotate around the hinge axis in a direction away from the ratchet rack 5, so that the pawl 41 disengages from the ratchet rack 5. Thus, when the first movable clamp 3 is pushed, there is no contact between the pawl 41 and the ratchet rack 5, so that no noise occurs between the pawl 41 and the ratchet rack 5 when the first movable clamp 3 is pushed, and the first movable clamp 3 moves more smoothly on the guide rail 1.

[0045] It should be noted that when the workpiece 10 is finished and the first movable clamp 3 needs to be unlocked, the pawl 41 is engaged with the ratchet rack 5, and the first movable clamp 3 can no longer move towards the fixed clamp 2. That is, the lever 42 cannot be moved to disengage the pawl 41 from the ratchet rack 5. At this point, the first movable clamp 3 can be directly pushed a certain distance away from the fixed clamp 2. The pushing force of the first movable clamp 3 is greater than the rebound force of the multiple elastic elements 43, causing the first movable clamp 3 to disengage from the workpiece 10. Of course, during the pushing process, the elastic elements 43 repeatedly switch between stretched and rebound states, allowing the first movable clamp 3 to be moved to any position, and there will be considerable noise between the pawl 41 and the ratchet rack 5. When it is necessary to clamp a workpiece 10 of a different specification, the first movable clamping body 3 can be pushed slightly towards the fixed clamping body 2, so that the pawl 41 engages with the tooth tips on the ratchet rack 5. At this time, the elastic element 43 is in a compressed state. Then, the lever 42 can be moved to prevent the pawl 41 from contacting the ratchet rack 5. Figure 8 As shown, the first movable clamp 3 can be quickly moved to a position where it fits against the workpiece 10 of another specification. Then, the lever 42 is released to lock the first movable clamp 3 in the current position. Figure 7 As shown, it clamps the workpiece 10 in conjunction with the fixed clamp body 2. When the lever 42 is moved, causing the pawl 41 to disengage from the ratchet, the first movable clamp body 3 is then moved, and no noise occurs between the pawl 41 and the ratchet rack 5. The elastic element 43 bends when in a compressed or stretched state.

[0046] Preferably, such as Figure 1 and Figure 2 As shown, the first locking component 4 is provided in two sets. The two sets of first locking components 4 are located on both sides of the vertical plate 13 and are symmetrically arranged along the center line of the length direction of the vertical plate 13. This enables both sides of the bottom of the first movable clamp 3 to obtain a stable locking force, preventing the first movable clamp 3 from shifting or tilting due to force on one side during clamping. This ensures that the clamping surfaces of the first movable clamp 3 and the fixed clamp 2 remain parallel, improving the flatness and accuracy of the workpiece 10 clamping.

[0047] Furthermore, the workpiece 10 held by the clamping jaws experiences a large impact force during processing, and the engagement strength between the pawl 41 and the ratchet rack 5 may be insufficient. Therefore, this embodiment also includes a second locking component 6 to overcome the insufficient engagement strength between the pawl 41 and the ratchet rack 5. Figures 1-6 As shown, the second locking assembly 6 includes a first threaded rod 61, a connecting sleeve 62, a locking rod 63, and a nut 64. A first elongated hole 111 along its length is provided on the upper plate 11, and a second elongated hole 131 along its length is provided on the vertical plate 13. The first elongated hole 111 and the second elongated hole 131 communicate with each other. The first threaded rod 61 extends vertically downwards and passes through the first movable clamp 3 and the first elongated hole 111, and is placed inside the second elongated hole 131. The first threaded rod 61 is screwed to the first movable clamp 3. The connecting sleeve 62 is perpendicularly connected to the first threaded rod 61. The locking rod 63 has a thread in its middle and is screwed to the connecting sleeve 62. Both ends of the locking rod 63 extend out from both ends of the connecting sleeve 62. The nut 64 is placed on the top of the first movable clamp 3 and is screwed to the first threaded rod 61. The top inner wall of the second elongated hole 131 has multiple slots 132 along its length. Rotating the nut 64 can drive the first threaded rod 61, the connecting sleeve 62, and the locking rod 63 to move vertically along the axis of the first threaded rod 61 simultaneously, so that the locking rod 63 can engage with or disengage from any slot 132, thereby locking or unlocking the first movable clamp 3 a second time. This allows the engagement of the pawl 41 with the ratchet rack 5 and the engagement of the locking rod 63 with the slot 132 to achieve a double lock on the first movable clamp 3, so that the first movable clamp 3 can move to cooperate with the fixed clamp 2 to clamp the workpiece. At 10 o'clock, after the pawl 41 and ratchet 5 initially lock the first movable clamp body 3, the nut 64 is turned, causing the first threaded rod 61 to drive the connecting sleeve 62 and the locking rod 63 to move vertically upward along the axis of the first threaded rod 61. This allows the locking rod 63 to engage with the corresponding slot 132, thus achieving a secondary locking of the first movable clamp body 3. Specifically, the locking rod 63 and the nut 64 press the first movable clamp body 3 against the upper plate 11, preventing the pawl 41 from disengaging from the ratchet 5 and the first movable clamp body 3 from loosening due to vibrations during the processing of the workpiece 10, further improving the reliability of the clamping. Simultaneously, when it is necessary to unlock the first movable clamp body 3, simply reverse the nut 64, causing the first threaded rod 61 to drive the connecting sleeve 62 and the locking rod 63 to move vertically downward along the axis of the first threaded rod 61. This causes the locking rod 63 to disengage from the slot 132, and in conjunction with the disengagement of the pawl 41 from the ratchet 5, the first movable clamp body 3 can then slide. It should be noted that the length of the connecting sleeve 62 is less than the width of the first elongated hole 111, so as to avoid interference between the connecting sleeve 62 and the inner wall of the first elongated hole 111 when the first threaded rod 61 drives the connecting sleeve 62 to move vertically up and down.

[0048] Furthermore, such as Figures 1-6As shown, the second locking assembly 6 also includes two guide plates 65. Both guide plates 65 are vertically fixed to the bottom of the first movable clamp body 3, and are symmetrically arranged about the axis of the connecting sleeve 62, located within the first elongated hole 111 and the second elongated hole 131. The opposite sidewalls of the two guide plates 65 can fit against the connecting sleeve 62 to guide the movement trajectory of the connecting sleeve 62 and the first threaded rod 61. This prevents the first threaded rod 61, connecting sleeve 62, and locking rod 63 from rotating synchronously during the vertical movement of the first threaded rod 61, connecting sleeve 62, and locking rod 63 caused by rotating the nut 64, ensuring that the locking rod 63 can accurately engage or disengage from the slot 132, thus improving the operational reliability and stability of the second locking assembly 6.

[0049] Furthermore, such as Figure 1 As shown, this embodiment also includes a fine-tuning component 7, which includes a second movable clamping body 71, a second threaded rod 72, and a rocker arm 73. The second movable clamping body 71 is positioned between the fixed clamping body 2 and the first movable clamping body 3. One end of the second threaded rod 72 passes horizontally through the fixed clamping body 2 and is rotatably connected to the side wall of the second movable clamping body 71 away from the first movable clamping body 3. The other end of the second threaded rod 72 is vertically and fixedly connected to the rocker arm 73, and the second threaded rod 72 is screwed to the fixed clamping body 2. Shaking the rocker arm 73 can drive the second threaded rod 72 to rotate, thereby driving the second movable clamping body 71 to move along its own axis toward the first movable clamping body 3, so as to further cooperate with the first movable clamping body 3 to clamp the workpiece 10, thereby further increasing the clamping force of the clamping pliers when clamping the workpiece 10 and ensuring that the clamping pliers stably clamp the workpiece 10. When it is necessary to clamp the workpiece 10, the workpiece 10 is placed on the guide rail 1 and positioned between the first movable clamp 3 and the second movable clamp 71, so that the workpiece 10 is in contact with the second movable clamp 71. Then, the first movable clamp 3 is quickly pushed so that the first movable clamp 3 is in contact with the workpiece 10. At this time, the first movable clamp 3 and the second movable clamp 71 achieve initial clamping of the workpiece 10. The workpiece 10 may still loosen. Therefore, the rocker arm 73 can be shaken to drive the second threaded rod 72 to rotate, so that the second movable clamp 71 moves toward the workpiece 10, so that the first movable clamp 3 and the second movable clamp 71 cooperate to further clamp the workpiece 10, thereby enabling the clamping clamp to clamp the workpiece 10 more securely and preventing the workpiece 10 from falling off during processing.

[0050] Furthermore, such as Figure 1As shown, the fine-tuning assembly 7 also includes two guide rods 74. Both guide rods 74 are horizontally arranged and symmetrically arranged about the axis of the second threaded rod 72. One end of each guide rod 74 passes through the fixed clamp 2 and is fixedly connected to the side of the second movable clamp 71 away from the first movable clamp 3, while the other end is placed outside the fixed clamp 2 to guide the movement trajectory of the second movable clamp 71 and prevent the second movable clamp 71 from deviating or tilting during movement.

[0051] Furthermore, such as Figure 1 and Figure 9 As shown, it also includes a base 8 and a rotating assembly 9. The base 8 can be placed horizontally on the worktable. The rotating assembly 9 includes a housing 91, a worm gear 92, a worm 93, a rotating shaft 94, and a drive rod 95. The bottom end of the housing 91 is fixedly installed on the top of the base 8. The rotating shaft 94 is vertically arranged, with one end rotatably connected to the inner bottom wall of the housing 91, and the other end passing through the housing 91 and fixedly connected to the bottom of the lower plate 12. The worm gear 92 is fixedly sleeved on the rotating shaft 94 and is coaxial with the rotating shaft 94. The worm 93 is horizontally arranged and meshes with the worm gear 92. The drive rod 95 passes through the housing 91 and the worm 93 and is rotatably connected to the housing 91. The drive rod 95 is fixedly connected to the worm 93 and is used to drive the worm 93 to rotate, so that the worm gear 92 and the rotating shaft 94 rotate simultaneously around their own axes, thereby driving the guide rail 1 to rotate horizontally to any angle, so that the clamping clamp can adapt to processing requirements in different directions (such as multi-angle welding and multi-directional machining). Meanwhile, the worm gear 92 and worm 93 have a self-locking function, which can automatically lock after rotating to the target angle to avoid angle deviation during processing and ensure processing accuracy.

[0052] Example 2

[0053] This embodiment provides a clamping method for clamping a workpiece using the clamping pliers described in Embodiment 1, comprising the following steps:

[0054] S1: Slide the first movable clamp 3 onto the upper plate 11 to ensure that the first movable clamp 3 fits tightly with the upper plate 11 and slides smoothly. At this time, the locking rod 63 is not in contact with the slot 132.

[0055] S2: Place the workpiece 10 on the upper plate 11 and make the workpiece 10 fit against the second movable clamp 71.

[0056] S3: Move the lever 42 downward to rotate the pawl 41 away from the ratchet rack 5, so that the pawl 41 and the ratchet rack 5 are no longer in contact. This pushes the first movable clamp 3 towards the second movable clamp 71, so that the first movable clamp 3 and the second movable clamp 71 cooperate to clamp the workpiece 10. At the same time, the pawl 41 engages with the ratchet rack 5, initially locking the position of the first movable clamp 3.

[0057] S4: Rotate the nut 64 so that the first threaded rod 61, the connecting sleeve 62 and the locking rod 63 move vertically upward along the axis of the first threaded rod 61 until the locking rod 63 is tightly engaged with the corresponding slot 132. At this time, the first movable clamp 3 is locked again, so that the first movable clamp 3 is stably locked in the current position.

[0058] S5: Shake the rocker arm 73 so that the second threaded rod 72 drives the second movable clamp 71 to move toward the workpiece 10 until the second movable clamp 71 and the first movable clamp 3 cooperate to firmly clamp the workpiece 10, so as to prevent the workpiece 10 from falling off during the processing.

[0059] S6: When the workpiece 10 is finished and needs to be released, shake the rocker arm 73 to drive the second movable clamp 71 to move away from the workpiece 10 in order to initially release the workpiece 10.

[0060] S7: Rotate the nut 64 so that the first threaded rod 61, the connecting sleeve 62 and the locking rod 63 move vertically downward along the axis of the first threaded rod 61 until the locking rod 63 disengages from the slot 132, pushing the first movable clamp 3 to move away from the fixed clamp 2 to the designated position to completely release the workpiece 10.

[0061] S8: When it is necessary to clamp a workpiece 10 of another specification, push the lever 42 downward to drive the pawl 41 to rotate away from the ratchet 5, so that the pawl 41 and the ratchet 5 are no longer in contact, and push the first movable clamp 3 to move away from the fixed clamp 2, so that there is enough workpiece accommodating space between the first movable clamp 3 and the second movable clamp 71. Then release the lever 42 so that the first movable clamp 3 is locked in the current position.

[0062] S9: Place the workpiece 10 in the workpiece receiving space and make it fit with the second movable clamp 71. Continue with steps S3-S5 to stably clamp the workpiece 10.

[0063] It should be noted that the clamping pliers of this embodiment are particularly suitable for drilling, tapping, grinding sealing surfaces, and welding small supports for solenoid valves or explosion-proof junction boxes in mine safety monitoring systems. Coal mines have numerous safety monitoring systems used to monitor methane, carbon monoxide, wind speed, etc. These systems require various solenoid valves (controlling the on / off of water / gas pipes) and explosion-proof junction boxes (cable branching points). Their housings are typically made of cast aluminum or cast iron, with a square or cylindrical shape and dimensions of approximately 200mm-400mm. The clamping pliers of this embodiment enable the rapid clamping of explosion-proof junction boxes and solenoid valves of various sizes and specifications for stable machining.

[0064] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A clamping pliers, characterized in that, It includes a guide rail (1), a fixed clamp body (2), a first movable clamp body (3), and a first locking assembly (4); The guide rail (1) includes an upper plate (11), a lower plate (12) and a vertical plate (13). The two ends of the vertical plate (13) are fixedly connected to the upper plate (11) and the lower plate (12) respectively in a horizontally arranged I-shape. The fixed clamp (2) is fixedly installed at one end of the top of the upper plate (11). The first movable clamp (3) is slidably installed on the upper plate (11) along the length direction of the upper plate (11) and is used to cooperate with the fixed clamp (2) to clamp or release the workpiece (10). A ratchet rack (5) extending along its own length direction is fixedly installed on the top surface of the lower plate (12). The first locking component (4) includes a pawl (41) and an elastic element (43). The pawl (41) is hinged to the bottom of the first movable clamp body (3), and the pawl (41) can engage with any tooth on the ratchet rack (5) to lock the first movable clamp body (3). The elastic element (43) is located between the pawl (41) and the first movable clamp body (3), and its two ends are fixedly connected to the pawl (41) and the first movable clamp body (3) respectively, so as to provide the pawl (41) with rebound force and buffer force.

2. The clamping pliers as described in claim 1, characterized in that: The pawl (41) has an installation groove on its outer wall facing the first movable clamp (3), and the end of the elastic member (43) away from the first movable clamp (3) is fixedly connected to the installation groove.

3. The clamping pliers as described in claim 2, characterized in that: The elastic element (43) is provided in multiple ways, and the multiple elastic elements (43) are spaced apart along the width direction of the guide rail (1).

4. The clamping pliers as described in claim 3, characterized in that: The first locking component (4) also includes a paddle (42); The paddle (42) is fixedly installed at the end of the pawl (41) away from the ratchet rack (5). The paddle (42) can drive the pawl (41) to rotate around the hinge axis in a direction away from the ratchet rack (5) so that the pawl (41) disengages from the ratchet rack (5).

5. The clamping pliers as described in claim 1, characterized in that: It also includes a second locking component (6); The second locking assembly (6) includes a first threaded rod (61), a connecting sleeve (62), a locking rod (63), and a nut (64). The upper plate (11) has a first long hole (111) along its own length direction, and the vertical plate (13) has a second long hole (131) along its own length direction. The first long hole (111) and the second long hole (131) are connected. The first threaded rod (61) extends vertically downward and passes through the first movable clamp body (3) and the first elongated hole (111) and is placed in the second elongated hole (131). The first threaded rod (61) is screwed to the first movable clamp body (3). The connecting sleeve (62) is vertically connected to the first threaded rod (61). The locking rod (63) has a thread in the middle and is screwed to the connecting sleeve (62). The two ends of the locking rod (63) extend out of the two ends of the connecting sleeve (62). The nut (64) is placed on the top of the first movable clamp body (3) and is screwed to the first threaded rod (61). The top inner wall of the second elongated hole (131) is provided with a plurality of slots (132) along its own length direction. Rotating the nut (64) can drive the first threaded rod (61), the connecting sleeve (62) and the locking rod (63) to move vertically along the axis of the first threaded rod (61) at the same time, so that the locking rod (63) is engaged in or disengaged from any of the slots (132) to lock or unlock the first movable clamp body (3) for a second time.

6. The clamping pliers as described in claim 5, characterized in that: The second locking component (6) also includes two guide plates (65); Both guide plates (65) are vertically fixedly installed at the bottom of the first movable clamp body (3), and the two guide plates (65) are symmetrically arranged about the axis of the connecting sleeve (62) and located in the first elongated hole (111) and the second elongated hole (131); The opposing sidewalls of the two guide plates (65) can fit against the connecting sleeve (62) to guide the movement trajectory of the connecting sleeve (62) and the first threaded rod (61).

7. The clamping pliers as described in claim 1, characterized in that: It also includes a fine-tuning assembly (7), which includes a second movable clamp (71), a second threaded rod (72), and a rocker arm (73); The second movable clamp (71) is placed between the fixed clamp (2) and the first movable clamp (3). One end of the second threaded rod (72) passes horizontally through the fixed clamp (2) and is rotatably connected to the side wall of the second movable clamp (71) away from the first movable clamp (3). The other end of the second threaded rod (72) is vertically fixedly connected to the rocker arm (73), and the second threaded rod (72) is screwed to the fixed clamp (2). By shaking the rocker arm (73), the second threaded rod (72) can be rotated, thereby causing the second movable clamp (71) to move along its own axis toward the first movable clamp (3) to further cooperate with the first movable clamp (3) to clamp the workpiece (10).

8. The clamping pliers as described in claim 7, characterized in that: The fine-tuning assembly (7) also includes two guide rods (74). Both guide rods (74) are horizontally arranged, and the two guide rods (74) are symmetrical about the axis of the second threaded rod (72); One end of each of the two guide rods (74) passes through the fixed clamp (2) and is fixedly connected to the side of the second movable clamp (71) away from the first movable clamp (3), and the other end is placed outside the fixed clamp (2) to guide the movement trajectory of the second movable clamp (71).

9. The clamping pliers as described in claim 1, characterized in that: It also includes a base (8) and a rotating assembly (9); The base (8) can be placed horizontally on the workbench; The rotating assembly (9) includes a housing (91), a worm gear (92), a worm (93), a rotating shaft (94), and a drive rod (95). The bottom end of the housing (91) is fixedly installed on the top of the base (8). The rotating shaft (94) is vertically arranged, with one end rotatably connected to the inner bottom wall of the housing (91), and the other end passing through the housing (91) and fixedly connected to the bottom of the lower plate (12). The worm gear (92) is fixedly sleeved on the rotating shaft (94) and connected to the bottom of the base (8). The rotating shaft (94) is coaxially arranged, the worm (93) is horizontally arranged and meshes with the worm wheel (92), the drive rod (95) passes through the housing (91) and the worm (93) and is rotatably connected to the housing (91), and the drive rod (95) is fixedly connected to the worm (93) to drive the worm (93) to rotate, so that the worm wheel (92) and the rotating shaft (94) rotate around their own axis at the same time, so as to drive the guide rail (1) to rotate horizontally to any angle.

10. A clamping method for clamping a workpiece using the clamping pliers according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Slide the first movable clamp (3) onto the upper plate (11), place the workpiece (10) on the upper plate (11), and make the workpiece (10) fit against the fixed clamp (2); S2: Push the first movable clamp (3) toward the fixed clamp (2) so that the first movable clamp (3) and the fixed clamp (2) cooperate to clamp the workpiece (10), and at the same time the pawl (41) engages with the ratchet rack (5) to lock the position of the first movable clamp (3) and complete the clamping of the workpiece (10); S3: When it is necessary to release the workpiece (10), push the first movable clamp (3) to move away from the fixed clamp (2) to the designated position to release the workpiece (10).

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