Mother-son pin ratchet mechanism quick-adjust pliers wrench

Abstract

A mother-son pin ratchet mechanism quick-adjust pliers wrench comprising a locking lever (1) and a moving lever (2), characterized in that: a guide groove (3) is formed on the locking lever (1), and the upper end of the moving lever (2) is arranged to slide in the guide groove (3); a guide seat (7) is slidably arranged on the upper part of the locking lever (1), a pawl (6) is provided on the upper end of the moving lever (2), a groove matching the pawl (6) is provided on the guide seat (7), and the pawl (6) is engaged in the groove, so that when the moving lever (2) slides, it drives the guide seat (7) to slide synchronously; a first clamping jaw (4) is provided on the guide seat (7), a second clamping jaw (5) is provided at the upper end of the locking lever (1), and the first clamping jaw (4) and the second clamping jaw (5) form a clamping structure; the moving lever (2) is arranged to slide in the guide groove (3) via a nut-son-pin limiting structure, wherein the nut-son-pin limiting structure comprises a clamping block (13), a nut shaft (10) and a son shaft (11); the clamping block (13) is arranged to move in the guide groove (3), the nut shaft (10) is guided through the clamping block (13) and both ends of which are rotatably connected to the moving lever (2); a projection (12) is provided at one end of the clamping block (13), a son axis (11) cooperating with the projection (12) is arranged in the guide groove (3), wherein one end of the son axis (11) is fixedly connected to the moving lever (2) and it is arranged on one side of the projection (12); several ratchet teeth (8) are formed on the upper surface of the guide groove (3) facing the guide seat (7), and tooth grooves cooperating with the ratchet teeth (8) are provided on the upper surface of the clamping block (13); and A return spring (9) is provided on the lower surface of the guide groove (3) facing away from the guide seat (7), wherein the return spring (9) is firmly connected to the clamping block (13).

Description

Technical area

[0001] The present utility model relates to the technical field of hand tools, in particular a

[0002] Mother-son pin ratchet mechanism quick-adjust pliers wrench. State of the art

[0003] A pliers wrench is a common hand tool widely used in mechanical assembly, maintenance, and other fields, primarily for holding or turning various fasteners. Conventional pliers wrenches typically consist of a locking lever, a sliding lever, and a clamping jaw. Moving the sliding lever adjusts the size of the clamping jaw to accommodate workpieces of varying dimensions.

[0004] In the prior art, a structure is typically used to achieve the displacement adjustment of the moving lever, in which a threaded spindle interacts with a slide. Rotating the spindle moves the slide along a guide groove, thereby adjusting the clamping opening. Although such a structure offers relatively high setting accuracy, the adjustment process is comparatively cumbersome. The operator must repeatedly rotate the spindle to achieve a wide opening adjustment, which reduces work efficiency. Furthermore, some prior art designs employ a structure in which a spring clamp or a positioning pin interacts with multi-stage positioning grooves.Although this allows for rapid positioning, positioning stability is low, so slippage can easily occur during the clamping process, making it difficult to meet the requirements of high loads.

[0005] Therefore, existing pliers wrenches exhibit a conflict between setting efficiency and positioning reliability, making it difficult to meet the dual requirements of rapid setting and stable locking. Particularly in applications where workpiece dimensions change frequently or one-handed operation is required, existing designs suffer from problems such as cumbersome setting and insufficient clamping force. Content of the utility model

[0006] The purpose of the present utility model is to provide a mother-son pin ratchet mechanism quick-adjusting pliers wrench to solve the technical problems of conventional pliers wrenches, namely cumbersome operation and low adjustment efficiency when setting the clamping opening, as well as the difficulty of simultaneously ensuring quick adjustment and stable locking.

[0007] To solve the aforementioned problem, the present utility model provides the following technical solution: A nut-and-son pin ratchet mechanism quick-adjusting pliers wrench comprises a locking lever and a moving lever, wherein a guide groove is formed on the locking lever, and the upper end of the moving lever is arranged to slide in the guide groove; a guide seat is arranged to slide on the upper part of the locking lever, a pawl is provided on the upper end of the moving lever, a groove corresponding to the pawl is provided on the guide seat, and the pawl is engaged in the groove, so that when the moving lever slides, it drives the guide seat to slide synchronously; a first clamping jaw is provided on the guide seat, a second clamping jaw is provided on the upper end of the locking lever, and the first clamping jaw and the second clamping jaw form a clamping structure;The moving lever is arranged to slide in the guide groove via a nut-son-pin limiting structure, the nut-son-pin limiting structure comprising a clamping block, a nut shaft, and a son shaft; the clamping block is movably arranged in the guide groove, the nut shaft passes through the clamping block, and both ends of the nut shaft are rotationally connected to the moving lever; a projection is provided at one end of the clamping block, a son shaft interacting with the projection is arranged in the guide groove, one end of the son shaft being fixedly connected to the moving lever and being arranged on one side of the projection; several ratchet teeth are formed on the upper surface of the guide groove facing the guide seat, and toothed grooves interacting with the ratchet teeth are provided on the upper surface of the clamping block;and a return spring is provided on the lower surface of the guide groove facing away from the guide seat, the return spring being rigidly connected to the clamping block.

[0008] The present utility model is further designed such that when the moving lever is not turned, the return spring pushes the clamping block upwards, so that the toothed slots on the clamping block engage with and limit the ratchet teeth; and when the moving lever is turned, the shaft pushes the projection, so that the clamping block rotates and the return spring compresses downwards, the toothed slots disengage from the ratchet teeth and the limit is lifted.

[0009] The present utility model is further designed in such a way that the nut shaft is passed through the clamping block and rotatably interacts with it, with both ends of the nut shaft being firmly connected to the moving lever.

[0010] The present utility model is further designed such that the latch and the groove on the guide seat form a sliding connection structure to realize the coupled movement between the moving lever and the guide seat.

[0011] The present utility model is further designed such that the ratchet teeth are arranged at uniform intervals along the longitudinal direction of the guide groove, for multi-stage adjustment of the size of the clamping opening.

[0012] In summary, the present utility model has the following main advantages: The present utility model effectively solves the problem that conventional pliers wrenches struggle to achieve simultaneously with adjustment efficiency and positioning stability thanks to its mother-son-pin ratchet mechanism quick-adjustment structure. Specifically, a turn of the actuating lever causes the sone shaft to press the projection, which in turn rotates the clamping block and compresses the return spring. This disengages the toothed slots on the clamping block from the ratchet teeth on the upper surface of the guide groove, resulting in rapid release. The operator can pull the actuating lever with one hand to actuate the guide seat and the first clamping jaw for rapid movement, significantly increasing the adjustment efficiency of the clamping opening.After the moving lever is reset, the return spring automatically pushes the clamping block upwards, so that the toothed slots re-engage with the ratchet teeth, ensuring a stable lock. This reliably prevents slippage during the clamping process; the clamping force is high and the positioning is reliable. At the same time, the connection structure of the pawl and guide seat ensures synchronous sliding of the moving lever and the guide seat, further improving smooth operation and consistency during adjustment. In addition, the ratchet teeth are arranged at regular intervals along the longitudinal direction of the guide slot, enabling multi-stage adjustment that adapts to workpieces of different dimensions and increases the tool's versatility and practicality. Description of the attached drawings Fig. 1 a schematic representation of the overall structure of the present utility model; Fig. 2 a sectional view of the structure of a moving lever of the present utility model; Fig. 3 a sectional view of the internal structure of the moving lever of the present utility model; Fig. 4 an enlarged view of area A from Fig. 3 of the present utility model; and Fig. 5 an exploded view of the overall structure of the present utility model.

[0013] In the drawings: 1-Fixing lever; 2-Moving lever; 3-Guide groove; 4-First clamping jaw; 5-Second clamping jaw; 6-Patent; 7-Guide seat; 8-Ratchet teeth; 9-Return spring; 10-Nut shaft; 11-Son shaft; 12-Protrusion; and 13-Clamping block. Examples of implementation

[0014] The technical solution in the embodiments of this utility model is described clearly and completely below with reference to the drawings in those embodiments. The embodiments described below with reference to the drawings are exemplary and serve only to explain this utility model, not to interpret it as a limitation of the present utility model.

[0015] The exemplary embodiment is explained below with reference to the overall structure of the present utility model.

[0016] A mother-son pin ratchet mechanism quick-adjust pliers wrench includes, as shown in the Fig. 1 to Fig.Figure 5 shows a locking lever 1 and a moving lever 2. The locking lever 1 serves as the supporting main part and is elongated overall, with one end forming a handle and the other end a working part. The moving lever 2 serves to adjust the size of the clamping opening and slid together with the locking lever 1.

[0017] Specifically, a guide groove 3 is formed along the longitudinal direction of the locking lever 1. The guide groove 3 is a rectangular through-groove that passes through the locking lever 1 and serves to receive and guide the sliding movement of the moving lever 2. The upper end of the moving lever 2 slides within the guide groove 3, while the lower end of the moving lever 2 protrudes from the guide groove 3 to facilitate gripping and applying force for the operator.

[0018] A guide seat 7 is slidably mounted on the upper part of the locking lever 1. The guide seat 7 is block-shaped and has a sliding structure on its lower part, which interacts with a rail guide on the upper part of the locking lever 1, allowing the guide seat 7 to slide longitudinally along the locking lever 1. A pawl 6 is fixedly mounted at the upper end of the moving lever 2. The pawl 6 is a projecting cylindrical structure. A groove corresponding to the pawl 6 is formed on the guide seat 7. The groove is a U-shaped groove with a downward-facing opening into which the pawl 6 engages, forming a sliding connection. When the moving lever 2 slides in the guide groove 3, the interaction of the pawl 6 with the groove drives the guide seat 7 to slide synchronously, thus achieving coupled adjustment.

[0019] A first clamping jaw 4 is fixedly arranged at the upper part of the guide seat 7. The first clamping jaw 4 is a hook-shaped structure bent towards the locking lever 1 and serves to clamp one side of the workpiece. A second clamping jaw 5 is fixedly arranged at the upper end of the locking lever 1. The second clamping jaw 5 is also a hook-shaped structure bent towards the guide seat 7 and positioned opposite the first clamping jaw 4. The first clamping jaw 4 and the second clamping jaw 5 together form the clamping part of the pliers wrench and serve to clamp various fasteners or workpieces.

[0020] To achieve sliding limitation of the moving lever 2 in the guide groove 3, a nut-son-pin limiting structure is used in the present utility model. This structure comprises a clamping block 13, a nut shaft 10, and a son shaft 11. The clamping block 13 is movably arranged in the guide groove 3, has an elongated overall shape, and can be moved and rotated to a limited extent in the depth direction of the guide groove 3. The nut shaft 10 passes through the clamping block 13, with both ends of the nut shaft 10 protruding from the clamping block 13 and being rotatably connected to the moving lever 2. Specifically, an axle bore is formed in the moving lever 2 into which both ends of the nut shaft 10 are inserted, allowing the clamping block 13 to rotate relative to the moving lever 2 about the axis of the nut shaft 10.

[0021] A projection 12 is arranged at one end of the clamping block 13. The projection 12 is a block-shaped structure that extends laterally from the end of the clamping block 13. A secondary shaft 11 is arranged in the guide groove 3 in conjunction with this projection. The secondary shaft 11 is a short-shaft structure, one end of which is rigidly connected to the actuating lever 2. Specifically, a mounting bore is formed on the side wall of the actuating lever 2, into which one end of the secondary shaft 11 is inserted and secured. The secondary shaft 11 is arranged on one side of the projection 12 and opposite the side surface of the projection 12. When the actuating lever 2 is rotated about its own axis, the secondary shaft 11 rotates with it, thereby pressing the projection 12 or disengaging from it, thus achieving a drive effect on the clamping block 13.

[0022] Regarding the limiting structure, several ratchet teeth 8 are formed on the upper surface of the guide groove 3 facing the guide seat 7. The ratchet teeth 8 are tooth-shaped structures arranged at regular intervals along the length of the guide groove 3 and have a one-sided inclined ratchet tooth shape, serving for one-sided limiting. Correspondingly matching tooth grooves are also arranged on the upper surface of the clamping block 13. The shape of these tooth grooves is adapted to the ratchet teeth 8 and can engage with them, thus positioning the clamping block 13 within the guide groove 3.

[0023] A return spring 9 is arranged on the lower surface of the guide groove 3, facing away from the guide seat 7. The return spring 9 is a compression spring, one end of which is fixedly connected to the lower surface of the guide groove 3 and the other end of which is fixedly connected to the lower surface of the clamping block 13. The return spring 9 constantly exerts an upward spring force on the clamping block 13, so that the clamping block 13 remains in an upward-pressed position in the absence of an external force.

[0024] The functionality of the present utility model is as follows: In its normal state, i.e., when the moving lever 2 is not rotated and opened, the moving lever 2 maintains its initial angle, with no contact or contact without pressure between the shaft 11 and the projection 12. At this point, the clamping block 13 is pushed upwards by the spring force of the return spring 9, so that the toothed grooves on the upper surface of the clamping block 13 engage firmly with the ratchet teeth 8 on the upper surface of the guide groove 3. This locks the moving lever 2 in its current position and prevents unintentional sliding during the clamping process.

[0025] When an adjustment of the clamping opening size is required, the operator grasps the actuating lever 2 and applies a rotational force, causing the actuating lever 2 to rotate about its axis through a specific angle. At this point, the secondary shaft 11, which is rigidly connected to the actuating lever 2, rotates along with it. During the rotation, the secondary shaft 11 presses the projection 12, causing the projection 12 to move downwards and drive the clamping block 13 to rotate downwards about the axis of the main shaft 10. As the clamping block 13 rotates, the toothed grooves on its upper surface disengage from the ratchet teeth 8, and the limit is released. Simultaneously, the clamping block 13 presses the return spring 9 downwards, causing the return spring 9 to store clamping energy.

[0026] With the limit switch released, the operator can adjust the size of the clamping opening by pulling the moving lever 2 to slide it along the guide groove 3. As the moving lever 2 slides, the guide seat 7 is driven by the pawl 6 to slide synchronously, causing the first clamping jaw 4 to move along with it and changing the distance between the first clamping jaw 4 and the second clamping jaw 5 to accommodate workpieces of different dimensions.

[0027] After adjusting to the desired position, the operator releases the moving lever 2, allowing it to return to its initial angle under the influence of gravity or with assistance from the operator. At this point, the connecting shaft 11 rotates back as well, and the pressure on the projection 12 is released. The spring force of the return spring 9 pushes the clamping block 13 upwards, so that the toothed grooves on the upper surface of the clamping block 13 re-engage with the ratchet teeth 8 and lock the moving lever 2 again. This completes the adjustment process.

[0028] It should be noted that the ratchet teeth 8 are arranged at regular intervals along the longitudinal direction of the guide groove 3, enabling multi-stage adjustment and allowing the operator to precisely select the size of the clamping opening according to the workpiece dimensions. The pawl 6 and the groove on the guide seat 7 form a sliding connection structure, ensuring smooth and reliable coupled movement of the moving lever 2 and the guide seat 7. The nut shaft 10 passes through the clamping block 13 and rotates with it, with both ends of the nut shaft 10 being rigidly connected to the moving lever 2. This gives the clamping block 13 a stable axis of rotation, thus improving the reliability and service life of the structure.

[0029] Although embodiments of the present utility model have been presented and described, this particular embodiment serves only to illustrate the present utility model and does not constitute a limitation of the utility model. The described specific features, structures, materials, or properties can be combined in any one or more embodiments or examples in a suitable manner. After reading this description, those skilled in the art can, without deviating from the principles and objectives of the present utility model, modify, replace, or redesign the embodiments as needed, without requiring any inventive step. However, such modifications, replacements, or redesigns fall within the scope of protection of the present utility model.

Claims

[1] A mother-son pin ratchet mechanism quick-adjust pliers wrench comprising a locking lever (1) and a moving lever (2), characterized by , that: a guide groove (3) is formed on the locking lever (1), and the upper end of the moving lever (2) is arranged to slide in the guide groove (3); a guide seat (7) is slidably arranged on the upper part of the locking lever (1), a pawl (6) is provided on the upper end of the moving lever (2), a groove matching the pawl (6) is provided on the guide seat (7), and the pawl (6) is engaged in the groove, so that when the moving lever (2) slides, it drives the guide seat (7) to slide synchronously; a first clamping jaw (4) is provided on the guide seat (7), a second clamping jaw (5) is provided at the upper end of the locking lever (1), and the first clamping jaw (4) and the second clamping jaw (5) form a clamping structure; the moving lever (2) is arranged to slide in the guide groove (3) via a nut-son-pin limiting structure, wherein the nut-son-pin limiting structure comprises a clamping block (13), a nut shaft (10) and a son shaft (11); the clamping block (13) is arranged to move in the guide groove (3), the nut shaft (10) is guided through the clamping block (13) and both ends of which are rotatably connected to the moving lever (2); a projection (12) is provided at one end of the clamping block (13), a son axis (11) cooperating with the projection (12) is arranged in the guide groove (3), wherein one end of the son axis (11) is fixedly connected to the moving lever (2) and it is arranged on one side of the projection (12); several ratchet teeth (8) are formed on the upper surface of the guide groove (3) facing the guide seat (7), and tooth grooves cooperating with the ratchet teeth (8) are provided on the upper surface of the clamping block (13); and A return spring (9) is provided on the lower surface of the guide groove (3) facing away from the guide seat (7), wherein the return spring (9) is firmly connected to the clamping block (13). [2] The mother-son pin ratchet mechanism quick-adjust pliers wrench according to claim 1, characterized by , that: When the moving lever (2) is not turned, the return spring (9) pushes the clamping block (13) upwards, so that the toothed grooves on the clamping block (13) engage with and limit the ratchet teeth (8); and when the moving lever (2) is turned, the son axis (11) presses the projection (12) so that the clamping block (13) rotates and the return spring (9) is compressed downwards, the tooth slots disengage from the ratchet teeth (8) and the limit is lifted. [3] The mother-son pin ratchet mechanism quick-adjust pliers wrench according to claim 1 or 2, characterized by , that: the mother shaft (10) is passed through the clamping block (13) and rotatably interacts with it, with both ends of the mother shaft (10) being firmly connected to the moving lever (2). [4] The mother-son pin ratchet mechanism quick-adjust pliers wrench according to claim 1 or 2, characterized by , that: The latch (6) and the groove on the guide seat (7) form a sliding connection structure to realize the coupled movement between the moving lever (2) and the guide seat (7). [5] The mother-son pin ratchet mechanism quick-adjust pliers wrench according to claim 1, characterized by , that: the ratchet teeth (8) are arranged at regular intervals along the longitudinal direction of the guide groove (3) for multi-stage adjustment of the size of the clamping opening.

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