Clamp

Abstract

The utility model relates to the technical field of manual tools, in particular to a tool or table-type equipment for fastening, connecting, detaching or clamping. According to the technical scheme, the clamp comprises a fixed clamping jaw, a movable clamping jaw and a guide rod, the fixed clamping jaw is connected to one end of the guide rod and extends towards one side of the guide rod, the movable clamping jaw is connected with a rod body of the guide rod, and the clamping face of the movable clamping jaw and the clamping face of the fixed clamping jaw are oppositely arranged; the longitudinal section of the fixed clamping jaw is of a step-shaped structure matched with the workbench guide rail. The clamp solves the problems that in the prior art, a workpiece in the middle of a table top of a working table cannot be clamped, and locking is not effective enough, the clamp can slide along a guide rail of the working table, the workpiece on the table top can be clamped, and the purposes of being good in safety, high in adaptability, good in locking performance and high in stability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of hand tool technology, and in particular to tools or benchtop devices for fastening, connecting, disassembling or clamping. Background Technology

[0002] Existing clamps, primarily used in woodworking for clamping workpieces, are generally categorized by their shape into F-type, G-type, and A-type clamps. An F-type clamp typically consists of two clamping bodies, a sliding rod, and a handle. Manipulating the handle causes the two clamping bodies to move relative to each other on the rod, thereby clamping or supporting the workpiece to maintain the distance between the two parts of the workpiece. Taking an F-type clamp as an example, due to the limited length of the jaws, a typical F-type clamp can only hold workpieces at the edge of the worktable and cannot operate on workpieces located in the center of the worktable.

[0003] For example, Chinese Patent No. CN113352244A discloses an F-type clamp, which belongs to the field of clamping technology. This clamp can only clamp edge workpieces and cannot clamp workpieces that are further away. Moreover, its locking device is not simple and effective enough, which increases the cost. Utility Model Content

[0004] This invention solves the problems of existing technologies, such as the inability to clamp workpieces in the middle of the worktable surface and insufficient locking effectiveness. This invention proposes a clamp that can slide along the worktable guide rail to clamp workpieces on the table surface, achieving the goals of good safety, high adaptability, good locking and strong stability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A clamp is characterized in that it includes a fixed clamping jaw, a movable clamping jaw, and a guide rod. The fixed clamping jaw is connected to one end of the guide rod and extends to one side of the guide rod. The movable clamping jaw is connected to the rod body of the guide rod, and the clamping surface of the movable clamping jaw is arranged opposite to the clamping surface of the fixed clamping jaw. The longitudinal section of the fixed clamping jaw has a stepped structure adapted to the worktable guide rail.

[0007] The advantage of this design is that its connection structure enhances the stability and load-bearing capacity of the fixture, improves the overall strength and reliability of the fixture, ensures that there will be no loosening of the fixed jaws, reduces the amount of assembly work, and allows the fixture to slide along the worktable guide rail to clamp the workpiece on the table.

[0008] Preferably, the movable gripper is connected to the guide rod via a fixing member. The movable gripper also includes a gripping head located at the top and a gripping rod and locking device located at the bottom. The movable gripper is connected to the gripping head and the gripping rod via a pin. The movable gripper is connected to the fixing member via a ratchet mechanism.

[0009] The advantage of this design is that the gripping head and the handle are connected by a pivot pin, which enables stable movement of the gripper. The use of a ratchet mechanism makes the adjustment process smoother and more precise, and the operation is simple, thus improving the applicability and convenience of the clamp.

[0010] Preferably, the longitudinal cross-sectional shape of the fixing claw is a "convex" shaped structure that conforms to the inner wall of the guide rail.

[0011] The advantage of this design is that the cross-sectional shape of the fixed gripper is similar to that of the inner wall of the guide rail, which can achieve a closer fit and a more stable clamping, allowing it to slide on the worktable surface for easy and flexible movement. It can clamp components in the middle of the worktable, and the convex structure increases the contact area and clamping force, effectively preventing the guide rail from shifting or shaking during processing or transportation, ensuring the accuracy and safety of operation.

[0012] Preferably, the ratchet mechanism is a toothed ratchet mechanism, including a ratchet and a pawl. The ratchet is fixed to the fixing member, the front end of the pawl engages with the ratchet, and the rear end is fixed to the locking device.

[0013] The advantage of this design is that the toothed ratchet mechanism provides a reliable adjustment and locking mechanism through the engagement of the ratchet and the pawl, which allows the clamp to be firmly held in the desired position after the pawl is in the moving position, avoiding loosening and slippage, and enhancing the stability and safety of the clamp in use.

[0014] Preferably, the locking device includes a locking trigger and a spring, the pawl is fixedly connected to the locking trigger, the bottom of the locking trigger is provided with a groove, one end of the spring is connected to the groove, and the other end is connected to the grip.

[0015] The advantage of this design is that the locking device, through the cooperation of the locking trigger and the spring, realizes the automatic locking and releasing of the gripper. It is easy to operate and responds quickly. The spring provides the necessary elasticity and rebound force, ensuring the stability and durability of the locking trigger during use, and improving the ease of use and reliability of the clamp.

[0016] Preferably, the pawl is connected to the locking trigger by a pin, and the ratchet is connected to the fixing member by a pin.

[0017] The advantages of this design are that the pin connection simplifies the assembly process, improves the stability and reliability of the structure, reduces the possibility of loosening and wear, enables the various components of the fixture to work together better, extends the service life of the fixture, and facilitates maintenance and replacement of parts.

[0018] Preferably, the width of the longitudinal section of the fixed gripper relative to the gripping surface of the movable gripper is smaller than the width opposite to the gripping surface of the movable gripper.

[0019] The advantage of this design is that it provides a wider clamping range and greater clamping torque, enhancing the adaptability and versatility of the fixture and improving work efficiency.

[0020] Preferably, the angle between the fixing claw and the guide rod is 88° to 90°.

[0021] The advantage of this design is that the near-right angle between the fixed gripper and the guide rod ensures that the gripper can provide maximum stability and clamping force perpendicular to the guide rod direction, reducing clamping instability and slippage caused by improper angle, and improving the working accuracy and safety of the fixture.

[0022] Preferably, the fixing claw and the guide rod are integrally formed.

[0023] Preferably, the fixing claw is formed by bending and forging one end of the guide rod.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0025] 1. This utility model adopts an F-type connection structure, integrating the fixed gripper and guide rod into a single unit, significantly improving the overall stability and load-bearing capacity of the fixture. This design not only simplifies the structure and reduces the number of parts, lowering manufacturing costs, but also enhances the strength and reliability of the fixture through integral molding. The fixed connection between the fixed gripper and guide rod prevents loosening during use, ensuring the fixture remains stable even under heavy loads, reducing the frequency of maintenance and repair. Furthermore, the F-type connection allows the fixture to maintain good working condition in various working environments, extending its service life and improving overall work efficiency.

[0026] 2. The movable gripper of the fixture is connected to the fixed component via a ratchet mechanism and equipped with a locking device, enabling flexible and precise gripper adjustment. The introduction of the ratchet mechanism makes the gripper adjustment process smoother and more controllable, and can lock in time to ensure the guide rail is fixed, improving the convenience of operation and work efficiency. The locking device consists of a locking trigger and a spring component, ensuring that the workpiece is firmly locked after clamping, preventing displacement or slippage during processing or transportation. This mechanism not only improves the applicability and versatility of the fixture, but also ensures the safety and accuracy of operation, adapting to the needs of various complex working conditions.

[0027] 3. The cross-sectional shape of the fixed gripper mimics the inner wall of the guide rail, featuring a "convex" design that ensures a tight fit and stable clamping. This design increases the contact area and clamping force, effectively preventing displacement and wobbling of the guide rail during processing or transportation, ensuring operational accuracy and safety. Simultaneously, the fixture can slide freely on the worktable, facilitating convenient and flexible movement and positioning for efficient clamping of components in the center of the worktable. The proportional design of the gripping head and fixed gripper expands the clamping range and torque, making the fixture suitable for guide rails of different specifications, improving work efficiency and ease of use. The overall design optimizes the operating process, reduces manual adjustments and operation time, and improves production efficiency. Attached Figure Description

[0028] Figure 1 This is a front view of a clamp according to the present invention.

[0029] Figure 2 This is a side view of a clamp according to the present invention.

[0030] Figure 3 This is a cross-sectional view of a clamp according to the present invention.

[0031] Figure 4 This is a partially enlarged view of a clamp according to the present invention.

[0032] Illustration: 1 Fixed gripper, 2 Movable gripper, 2.1 Gripping head, 2.2 Grip bar, 2.3 Ratchet mechanism, 2.31 Ratchet, 2.32 Pad, 2.4 Locking device, 2.41 Locking trigger, 2.42 Spring, 3 Guide rod, 4 Fixing component. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings. The proportions of the components are not drawn to scale, and the proportions and dimensions shown in the drawings should not limit the essential technical solutions of this utility model. These embodiments do not exhaustively describe all details, nor do they limit this utility model to merely the specific embodiments described.

[0034] See Figure 1-3 As shown, a clamp includes a fixed clamp 1, a movable clamp 2, and a guide rod 3. The fixed clamp 1 is connected to one end of the guide rod 3 and extends to one side of the guide rod 3. The movable clamp 2 is connected to the rod body of the guide rod 3, and the clamping surface of the movable clamp 2 is opposite to the clamping surface of the fixed clamp 1. The longitudinal section of the fixed clamp 1 has a stepped structure adapted to the worktable guide rail.

[0035] like Figure 1 In one embodiment shown, Figure 1 This is a front view of a clamp according to the present invention. The present invention relates to a clamp designed to solve the problems of ineffective clamping of workpieces in the middle of a worktable and insufficient locking in existing technologies. The device of the present invention mainly consists of a fixed clamp 1, a movable clamp 2, and a guide rod 3. The fixed clamp 1 is located at the top of the guide rod 3 and is integrally formed with the guide rod, ensuring the stability of the overall structure. A fixing element 4 is fixed on the guide rod 3, and the fixed clamp 1, guide rod 3, and movable clamp 2 are connected in an "F" shape. This "F"-shaped connection structure not only enhances the stability and load-bearing capacity of the clamp but also simplifies the structure through the integral molding design, improving the overall strength and reliability of the clamp, ensuring the tightness of the fixed clamp 1 during use, avoiding loosening problems, and reducing assembly workload.

[0036] The movable gripper 2 is connected to the fixed member 4 via an adjusting assembly. The movable gripper 2 is equipped with a locking device 2.4, further ensuring the locking reliability of the clamp during use. Specifically, the movable gripper 2 includes a gripping head 2.1 located at the upper end of the fixed member 4 and a gripping rod 2.2 located at the lower end of the fixed member 4. Both are connected to the fixed member 4 via a pin, forming a stable motion structure. The adjusting assembly adopts a toothed ratchet mechanism, which, combined with the design of the locking device 2.4, makes the adjustment process of the movable gripper 2 smoother and more precise, and easier to operate. The locking device consists of a locking trigger and a spring. The locking trigger is connected to the pawl via a pin, and one end of the spring is connected to the groove of the locking trigger, while the other end is connected to the gripping rod 2.2. This design allows the gripper to automatically lock after adjustment, maintaining the desired position and ensuring the firmness of the grip and the responsiveness during operation.

[0037] The fixed jaw 1 is adapted to the guide rail track, and its cross-sectional shape imitates the structure of the inner wall of the guide rail track, presenting a "convex" shape. The fixed jaw can slide along the track of the workbench, expanding its working range. During use, the fixed jaw is embedded in the track of the workbench, enabling it to slide and operate on the workbench surface, facilitating flexible movement and clamping the components relative to the middle part of the workbench. This design not only enables the fixed jaw 1 to fit closely with the guide rail track, ensuring the stability of clamping, but also allows for sliding operations on the workbench, facilitating flexible movement and clamping of the guide rail components in the middle of the workbench. The length of the fixed jaw 1 is greater than the length of the clamping head 2.1, and the width of the clamping head 2.1 is greater than the width of the fixed jaw 1. The width of the longitudinal section of the fixed jaw 1 relative to the clamping surface of the movable jaw 2 is smaller than the width opposite to the clamping surface of the movable jaw 2. This proportional design provides a wider clamping range and a greater clamping torque. The included angle between the fixed jaw 1 and the guide rod 3 is designed to be 88° to 90°. The included angle close to a right angle not only ensures that the jaw can provide the maximum stability and clamping force perpendicular to the direction of the guide rod, but also effectively reduces the problems of unstable clamping and sliding caused by improper included angles, improving the working accuracy and safety of the fixture. The device of the present utility model, through the cooperation of the "F" - type connection structure, ratchet mechanism and locking device, can firmly fix the guide rail, effectively preventing the guide rail from shifting or shaking during the processing, greatly enhancing the safety of the operation. At the same time, the automatic locking and releasing function of the locking device ensures the safety of the fixture at different operation stages, reducing the potential safety hazards caused by human operation errors. The profiling cross - section and dimensional ratio design of the fixed jaw 1 enable this fixture to adapt to the guide rail.

[0038] The combination of the ratchet mechanism and the locking device enables the movable jaw 2 to be firmly held in the required position after adjustment, avoiding the problems of loosening and sliding that may occur during the clamping process. The locking device realizes the automatic locking and releasing of the jaw through the cooperation of the locking trigger and the spring member, with simple operation and rapid response, ensuring the locking reliability of the fixture in different operation states. In addition, the integral molding design of the guide rod 3 and the fixed jaw 1, together with the "F" - type connection structure, endows the entire fixture with higher stability and bearing capacity during the force - bearing process. The included angle design of the fixed jaw 1 and the guide rod 3 close to a right angle further enhances the stability of the fixture, ensuring that it can still maintain a stable clamping state under high - strength operations.

[0039] The fixed jaw 1 is designed with a "convex" - shaped structure that is profiled to the inner wall of the guide rail track, providing a larger contact area and a stronger clamping force, ensuring that the guide rail will not shift or shake during processing or transportation, improving the accuracy and safety of the operation. At the same time, the sliding design of the fixed jaw on the workbench surface facilitates the position adjustment of the fixture, enabling the operator to flexibly clamp the workpiece in the middle of the workbench, further enhancing the convenience and working efficiency of the operation.

[0040] The integrally formed fixed jaw 1 and the guide rod 3 are designed to reduce the use of components and assembly processes, simplifying the overall structure of the fixture. This not only improves the overall strength and reliability of the fixture but also makes the maintenance and servicing of the fixture more convenient. The adoption of the pin connection method makes the connection between each component more stable, reducing the risk of loosening and wear and extending the service life of the fixture. In addition, the design of the cross-sectional shape of the fixed jaw 1 being contoured to the inner wall of the guide rail track ensures a tight fit and stable clamping during the working process of the fixture, enhancing the fixing effect of the guide rail during operation and reducing the operation risk caused by unstable clamping.

[0041] As Figure 2 shown in an embodiment, Figure 2 This is a side view of a fixture of the present utility model. A fixture designed by the present utility model adopts an integrally formed fixed jaw 1 and a guide rod 3, and firmly fixes the fixing member 4 at the top of the guide rod through an "F"-shaped connection structure. This design significantly enhances the overall stability and bearing capacity of the fixture, avoids the problem of loosening of the fixed jaw, simplifies the structure, improves the overall strength and reliability, and reduces the assembly workload. The movable jaw 2 is connected to the fixing member 4 through a ratchet mechanism 2.3, enabling flexible adjustment of the position of the chuck. The introduction of the ratchet mechanism makes the adjustment process smoother, more precise, and easier to operate, enhancing the applicability and convenience of the fixture.

[0042] The cross-sectional shape of the fixed jaw 1 is contoured to the inner wall of the guide rail track, presenting a "convex" - shaped structure. This design ensures a closer fit and more stable clamping between the jaw and the guide rail track. During the working process, the fixture can smoothly slide on the workbench surface, facilitating flexible movement and being particularly suitable for clamping operations on components in the middle of the workbench. The convex - shaped structure increases the contact area and clamping force, effectively preventing the guide rail from shifting or shaking during processing and ensuring the accuracy and safety of the operation.

[0043] The movable jaw 2 also includes a clamping head 2.1 and a grip rod 2.2, which are connected to the fixing member 4 through a pin, ensuring the stable movement of the chuck. The adoption of the ratchet mechanism 2.3 makes the adjustment process not only smooth but also highly precise, allowing easy adjustment and locking of the position of the chuck. The setting of the locking device further guarantees the firmness of the clamped workpiece, preventing loosening or sliding during operation, thereby improving the work efficiency and machining accuracy. Especially the toothed ratchet mechanism provides a reliable adjustment and locking mechanism through the effective engagement of the ratchet and the pawl, enhancing the use stability and safety of the fixture.

[0044] The locking device includes a locking trigger and a spring component. A pawl is fixedly connected to the locking trigger, which has a groove at its bottom. One end of the spring component is connected to the groove, and the other end is connected to a lever. This design allows the chuck to automatically lock and release, offering simple operation and rapid response. The spring component provides the necessary elasticity and rebound force, ensuring the stability and durability of the locking trigger during use, thus improving the ease of use and reliability of the clamp. Furthermore, the pawl and locking trigger, as well as the ratchet and fixing component, are connected by pins, simplifying the assembly process, enhancing structural stability and reliability, reducing the possibility of loosening and wear, extending the clamp's service life, and facilitating maintenance and parts replacement.

[0045] The length of the fixed jaw 1 is greater than the length of the clamping head 2.1, the width of the clamping head 2.1 is greater than the width of the fixed jaw 1, and the width of the longitudinal section of the fixed jaw 1 relative to the clamping surface of the movable jaw 2 is less than the width of the clamping surface opposite to the movable jaw 2. This dimensional design provides a wider clamping range and a greater clamping torque.

[0046] like Figure 3 and Figure 4 In one embodiment shown, Figure 3 This is a cross-sectional view of a clamp according to the present invention. The clamp designed in this invention uses a geared ratchet mechanism 2.3 as the core adjustment component. The ratchet 2.31 is fixed to the fixing member 4, and the pawl 2.32 precisely engages with the ratchet 2.31. This design ensures stability and reliability during the adjustment process. The geared ratchet mechanism, through the precise engagement of the ratchet and pawl, effectively controls the position adjustment of the movable pawl 2, avoiding clamping position deviation caused by mechanical loosening or misoperation. The precise cooperation between the gear and the pawl not only improves the accuracy of adjustment but also enhances the durability and service life of the overall structure.

[0047] The locking device 2.4 consists of a locking trigger 2.41 and a spring element 2.42, with the pawl 2.32 securely connected to the locking trigger 2.41 via a pin. The groove design at the bottom of the locking trigger allows the spring element 2.42 to stably connect to the gripping rod 2.2, providing the necessary elastic rebound force. When the movable gripper 2 is adjusted to the desired position, the locking device responds quickly, pressing the locking trigger with the elastic force of the spring. The cooperation of the pawl and ratchet ensures the clamp is firmly locked in the set position during use, preventing loosening or slippage during clamping. The locking force must be greater than the test clamping force by 150 LBS (equivalent to 68 kg); when the test clamping force is applied, the maximum release force of the release rod must not exceed 20 lbs / 9.08 kgf. This mechanism significantly improves the operability and safety of the clamp, allowing users to clamp and adjust the guide rail more efficiently and conveniently.

[0048] The pawl 2.32 and locking trigger 2.41, and the ratchet 2.31 and fixing component 4 are all connected by pins. This connection method not only simplifies the assembly process of the overall structure but also enhances the stability and interchangeability between components. The pin connection has good wear resistance and high strength, effectively resisting mechanical stress during use and reducing wear and loosening caused by frequent adjustment and locking. In addition, the pin connection facilitates the maintenance and replacement of components, improving the maintainability and service life of the clamp. Through this optimized design, the entire clamp structure is more compact, the operation is smoother, and users can experience superior performance and reliability in actual use.

[0049] In one embodiment, the present invention is applied to wood cutting. The wood to be processed is placed on a worktable, and multiple devices of the present invention are used to clamp the wood: the extension of the fixed clamp 1 is inserted into the worktable guide rail below the wood, and the movable clamp 2 is located above the fixed clamp 1 and is tightly fitted with the top of the wood and locked by a locking device. At this time, the wood is clamped and fixed relative to the worktable by multiple devices of the present invention used in reverse. During this process, the device of the present invention can be located at the edge of the worktable or at the center of the worktable.

[0050] In summary, the clamp designed in this utility model achieves precise control and stable locking of the position adjustment of the movable jaw 2 by introducing a toothed ratchet mechanism and a high-efficiency locking device. The coordinated operation of the toothed ratchet mechanism and the locking device ensures the efficient operation and reliable performance of the clamp under different operating conditions. The pin-connection structure not only improves the stability and durability of each component, but also simplifies the assembly and maintenance process, enhancing the overall user experience. In addition, the near-right-angle design between the fixed jaw 1 and the guide rod 3, as well as the dimensional optimization of the clamping head 2.1 and the fixed jaw 1, further enhance the adaptability and versatility of the clamp, enabling it to stably clamp guide rails of different sizes and shapes, demonstrating excellent performance in practical industrial applications.

[0051] This optimized design not only improves the fixture's efficiency and ease of operation but also reduces manufacturing and maintenance costs by enhancing structural reliability and durability. Whether in machining or daily use, the fixture provides a stable and precise clamping effect, ensuring the guide rail remains stable in various environments and preventing production accidents or product quality issues caused by improper clamping. It allows for quick and accurate adjustment and secure locking of the fixture position during operation, significantly improving production line efficiency and product machining accuracy.

[0052] This utility model is not limited to the above-described embodiments. Any changes made to its shape or material composition, as long as the structural design provided by this utility model is adopted, are considered a variation of this utility model and should be regarded as within the protection scope of this utility model.

Claims

1. A clamp, characterized in that, It includes a fixed jaw (1), a movable jaw (2) and a guide rod (3). The fixed jaw (1) is connected to one end of the guide rod (3) and extends towards one side of the guide rod (3). The movable jaw (2) is connected to the rod body of the guide rod (3), and the clamping surface of the movable jaw (2) is arranged opposite to the clamping surface of the fixed jaw (1). The longitudinal section of the fixed jaw (1) has a stepped structure adapted to the workbench guide rail; the movable jaw is connected to the guide rod through a fixing member, and a ratchet mechanism is connected between the movable jaw and the fixing member. The ratchet mechanism includes a ratchet and a pawl. The ratchet is fixed on the fixing member, the front end of the pawl meshes with the ratchet, and the rear end is fixed on the locking device. The locking device includes a locking trigger and a spring member. The pawl is fixedly connected to the locking trigger. A groove is provided at the bottom of the locking trigger, one end of the spring member is connected to the groove, and the other end is connected to the grip rod.

2. The clamp according to claim 1, characterized in that, The movable jaw (2) is connected to the guide rod through a fixing member (4). The movable jaw (2) further includes a clamping head (2.1) located above, a grip rod (2.2) and a locking device (2.4) located at the lower end. The movable jaw (2) is connected to the clamping head (2.1) and the grip rod (2.2) through a pin. A ratchet mechanism (2.3) is connected between the movable jaw (2) and the fixing member (4).

3. A clamp according to claim 1 or 2, characterized in that, The longitudinal section shape of the fixed jaw (1) is a structure that is shaped to conform to the inner wall of the track of the guide rail, presenting a "convex" shape structure.

4. A clamp according to claim 2, characterized in that, The ratchet mechanism (2.3) is a toothed ratchet mechanism.

5. A clamp according to claim 1, characterized in that, The pawl (2.32) is connected to the locking trigger (2. =41) by a pin, and the ratchet (2.31) is connected to the fixing member (4) by a pin.

6. A clamp according to claim 4 or 5, characterized in that, The width of the longitudinal section of the fixed jaw (1) relative to the clamping surface of the movable jaw (2) is smaller than the width opposite to the clamping surface of the movable jaw (2).

7. A clamp according to claim 6, characterized in that, The included angle between the fixed jaw (1) and the guide rod (3) is 88° to 90°.

8. A clamp according to claim 7, characterized in that, The fixed jaw and the guide rod are integrally formed.

9. A clamp according to claim 8, characterized in that, The fixed jaw is formed by bending and forging one end of the guide rod.

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