A flat tongs

Abstract

This utility model relates to the field of bolt clamp technology, specifically to a flat bolt clamp, including a fixed jaw, the rear end of which is connected to a fixed handle, and the rear end of which is rotatably connected to a movable jaw. Flat clamping plates are connected to the opposite faces of the front ends of both the fixed and movable jaws. A tension spring is provided between the middle of the fixed handle and the movable jaw. The rear end of the fixed handle is threadedly connected to an adjusting bolt, and a groove is provided on the side of the fixed handle facing the movable handle, with the front end of the adjusting bolt extending into the groove. The movable jaw is rotatably connected to the front end of the movable handle, and the middle of the movable handle is rotatably connected to the front end of a support plate. Protective rubber sleeves are fitted over the front ends of both the fixed and movable jaws, covering the outer surface of the clamping plates. The protective rubber sleeves in this utility model are soft and elastic, effectively buffering the friction between the workpiece and the clamping plates, reducing workpiece wear, and increasing the friction between the fixed and movable jaws and the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of bolt clamp technology, specifically to a flat bolt clamp. Background Technology

[0002] Pliers are a type of common pliers tool used to clamp and hold certain parts for welding, riveting, punching, grinding, cutting, and other processing. Their main features are that the jaws can quickly lock and generate a large clamping force, preventing the clamped parts from loosening. Additionally, the jaws have a screw-type fine-tuning knob, allowing adjustment to the most suitable position for clamping parts of different thicknesses.

[0003] Pliers can be categorized based on the shape or function of their heads as follows: curved-nose pliers, straight-nose pliers, needle-nose pliers, C-type pliers, chain pliers, welding pliers, flat pliers, and bent-nose pliers. Among these, flat pliers are suitable for gripping flat iron plates and can be used to clamp and bend sheet metal.

[0004] However, due to the relatively large clamping surface of the flat vise and the workpiece, when the vise completes clamping and enters the machining process, slight displacement can easily occur between the workpiece and the jaws of the vise under the combined effect of various machining stresses. This seemingly small displacement can lead to frequent friction between the workpiece and the jaws during continuous machining. From the perspective of material wear principles, long-term, high-frequency friction will inevitably cause wear on the workpiece surface, affecting not only the appearance quality of the workpiece but also, in severe cases, reducing the dimensional accuracy of the workpiece. This, in turn, affects the performance and quality of the entire product, bringing additional negative effects such as increased defect rates and costs to industrial production. Utility Model Content

[0005] To address the technical problem that when a flat vise clamps completes clamping of a workpiece and enters the processing stage, under the combined effect of various processing stresses, slight displacement easily occurs between the workpiece and the jaws of the flat vise clamps, causing wear on the workpiece surface, this utility model provides a flat vise clamp.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A type of flat-plate pliers includes a fixed jaw, the rear end of which is connected to a fixed handle, and the rear end of which is rotatably connected to a movable jaw. Flat clamping plates are connected to the opposite faces of the front ends of both the fixed and movable jaws. A tension spring is provided between the middle of the fixed handle and the movable jaw. The rear end of the fixed handle is threadedly connected to an adjusting bolt, and a groove is provided on the side of the fixed handle facing the movable handle, with the front end of the adjusting bolt extending into the groove. The movable jaw is rotatably connected to the front end of the movable handle, and the middle of the movable handle is rotatably connected to the front end of a support plate. The rear end of the support plate extends into the groove and abuts against the front end of the adjusting bolt. A protrusion is provided in the middle of the support plate away from the fixed handle. The rear end of the movable handle is rotatably connected to the middle of a hinge, with the front end of the hinge abutting against the protrusion. Protective rubber sleeves are fitted over the front ends of both the fixed and movable jaws, covering the outer surface of the clamping plates.

[0008] With the above structural design, the front ends of both the fixed jaw and the movable jaw are fitted with protective rubber sleeves. The protective rubber sleeves are made of soft and highly wear-resistant rubber material, which can tightly wrap the outer surface of the clamping plate, effectively buffer the friction between the workpiece and the clamping plate, reduce workpiece wear, and increase the friction between the fixed jaw and the movable jaw and the workpiece.

[0009] As a preferred implementation of a flat vise clamp, the protective sleeve is bonded to the clamp plate.

[0010] The above structural design ensures a strong connection between the protective sleeve and the clamping plate. The adhesive used is a special adhesive for rubber and metal materials, such as cold vulcanizing adhesive, which forms a bond layer with shear and peel resistance after curing. Before applying the adhesive, the clamping plate surface needs to be cleaned to remove oil, oxide layers, and other impurities, creating a certain degree of micro-roughness to increase the adhesion of the adhesive. A uniform, consistent coating process is used to ensure a strong bond is formed across the entire contact surface between the protective sleeve and the clamping plate, preventing the protective sleeve from detaching during long-term use.

[0011] As a preferred implementation of a flat vise pliers, several anti-slip grooves are provided on the opposing surfaces of the two protective rubber sleeves.

[0012] By adopting the above structural design, the anti-slip grooves can increase the friction between the protective sleeve and the workpiece, thereby improving the stability of workpiece clamping. Furthermore, the anti-slip grooves can be arranged in a regular pattern with equal spacing and depth. The depth of the anti-slip grooves is controlled within a range that effectively increases friction and prevents the workpiece from sliding during clamping, without being too deep and affecting the overall strength and cushioning performance of the protective sleeve.

[0013] As a preferred implementation of a flat bolt clamp, the rear end of the adjusting bolt is connected to a ring one, which is connected to one end of a wire rope, and the other end of the wire rope is connected to a ring two, which is connected to a hook.

[0014] With the above structural design, the hook allows the flat pliers to be easily hung in one place, preventing them from being lost.

[0015] As a preferred implementation of a flat vise pliers, each of the two opposing surfaces of the flat vise is provided with several rectangular anti-slip protrusions, and the inside of the protective rubber sleeve is fitted with the anti-slip protrusions.

[0016] The above structural design prevents the flat plate from detaching from the protective sleeve.

[0017] As a preferred implementation of a flat vise, the rear end of the fixed jaw is rotatably connected to the movable jaw by rivet one, the movable jaw is rotatably connected to the front end of the movable handle by rivet two, the middle part of the movable handle is rotatably connected to the front end of the support plate by rivet three, and the rear end of the movable handle is rotatably connected to the middle part of the lifting plate by rivet four.

[0018] The above structural design uses rivets for rotating connections, resulting in low connection costs, reduced loosening, and low rotational noise.

[0019] As a preferred implementation of a flat-plate pliers, the outer surface of the blade is covered with a shock-absorbing pad.

[0020] With the above structural design, the shock-absorbing pad effectively buffers the impact force generated during the opening and closing of the lever, reducing hand vibration felt by the operator when using the pliers and improving operational comfort. The thickness design of the shock-absorbing pad effectively buffers the impact force generated during the opening and closing of the lever without affecting the flexibility of the movable handle.

[0021] As a preferred implementation of a flat-plate pliers, reinforcing ribs are provided at the connection points between the fixed jaws and the movable jaws and the clamping plate.

[0022] By adopting the above structural design, the reinforcing ribs can enhance the structural strength of the connection between the fixed jaws, the movable jaws and the flat plate, ensuring that the connection between the fixed jaws, the movable jaws and the flat plate will not deform or break when the flat plate pliers are frequently subjected to high-intensity clamping forces, thus greatly improving the overall durability and reliability of the flat plate pliers.

[0023] As a preferred implementation of flat bolt clamps, both the fixed handle and the movable handle are equipped with anti-slip rubber pads.

[0024] By adopting the above structural design, the friction between the fixed handle, the movable handle and the operator's hand is increased, which prevents the flat pliers from slipping due to sweaty hands or uneven force applied by the operator.

[0025] As a preferred implementation of a flat-plate pliers, an oil reservoir is provided on the outer surface of the adjusting bolt, and the oil reservoir is set along the axial direction of the adjusting bolt.

[0026] With the above structural design, the oil reservoir can store lubricating oil or grease, making the adjustment of the adjusting bolts smoother and more precise.

[0027] The beneficial effects of this utility model include:

[0028] Both the fixed and movable jaws are fitted with protective rubber sleeves at their front ends. These sleeves tightly wrap around the outer surface of the clamping plate. The sleeves are soft and elastic, effectively cushioning the friction between the workpiece and the clamping plate, reducing workpiece wear, and increasing the friction between the fixed and movable jaws and the workpiece. This solves the technical problem that when the flat vise clamps finish clamping the workpiece and enter the processing stage, under the combined effect of various processing stresses, slight displacement can easily occur between the workpiece and the jaws of the flat vise clamps, causing wear on the workpiece surface. Attached Figure Description

[0029] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a cross-sectional structural diagram of a flat-plate pliers according to a specific embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the anti-slip groove on the protective rubber sleeve in a specific embodiment of this utility model;

[0032] Figure 3 This is a cross-sectional structural diagram of a flat bolt clamp with a steel wire rope and a hook in a specific embodiment of the present utility model.

[0033] Figure 4 for Figure 1 Enlarged schematic diagram of the structure at point A;

[0034] Figure 5 This is a schematic diagram of the reinforcing rib in a specific embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the adjusting bolt in a specific embodiment of the present invention.

[0036] List of components and reference numerals:

[0037] 1. Fixed jaws; 2. Fixed handle; 3. Movable jaws; 4. Clamping plate; 5. Tension spring; 6. Adjusting bolt; 7. Groove; 8. Movable handle; 9. Support plate; 10. Protrusion; 11. Flip plate; 12. Protective rubber sleeve; 13. Anti-slip groove; 14. Ring one; 15. Steel wire rope; 16. Ring two; 17. Hook; 18. Anti-slip protrusions; 19. Rivet one; 20. Rivet two; 21. Rivet three; 22. Rivet four; 23. Shock-absorbing pad; 24. Reinforcing rib; 25. Anti-slip rubber pad; 26. Oil reservoir. Detailed Implementation

[0038] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Reference Figures 1-6 This embodiment proposes a flat vise, including a fixed jaw 1, a fixed handle 2, a movable jaw 3, a clamping plate 4, a tension spring 5, an adjusting bolt 6, a movable handle 8, a support plate 9, a protrusion 10, a lifting plate 11, and a hook 17. The rear end of the fixed jaw 1 is connected to the fixed handle 2, and the rear end of the fixed jaw 1 is rotatably connected to the movable jaw 3 by a rivet 19. Flat clamping plates 4 are connected to the opposite faces of the front ends of the fixed jaw 1 and the movable jaw 3. Reinforcing ribs 24 are provided at the connection points between the fixed jaw 1, the movable jaw 3, and the clamping plates 4 on both sides of the fixed jaw 1 and the movable jaw 3. The reinforcing ribs 24 strengthen the structural strength of the connection points between the fixed jaw 1, the movable jaw 3, and the flat plate, ensuring that the connection points will not deform or break when the flat vise is frequently subjected to high-intensity clamping forces. Several rectangular anti-slip protrusions 18 are provided on the opposite faces of the two flat plates, and the interior of the protective rubber sleeve 12 fits into the anti-slip protrusions 18.

[0040] The rear end of the fixed handle 2 is threadedly connected to the adjusting bolt 6. The outer surface of the adjusting bolt 6 has an oil reservoir 26, which is positioned along the axial direction of the adjusting bolt 6. The two ends of the oil reservoir 26 are not connected to the two end faces of the adjusting bolt 6. The oil reservoir 26 allows for convenient storage of lubricating oil or grease, improving the smoothness of the adjusting bolt 6's rotation. When the adjusting bolt 6 becomes stiff, it can be unscrewed, and lubricating oil or grease can be added to the oil reservoir 26. A first ring 14 is connected to the rear end of the adjusting bolt 6. The first ring 14 is connected to one end of a steel wire rope 15, and the other end of the steel wire rope 15 is connected to a second ring 16. The second ring 16 is connected to a hook 17, which is hung on a wall or other stable support structure to prevent loss. The fixed handle 2 has a groove 7 on the side facing the movable handle 8, and the front end of the adjusting bolt 6 extends into the groove 7.

[0041] A tension spring 5 is provided between the middle of the fixed handle 2 and the movable jaw 3. The movable jaw 3 is rotatably connected to the front end of the movable handle 8 by rivet 20. The movable handle 8 is arc-shaped. The middle of the movable handle 8 is rotatably connected to the front end of the support plate 9 by rivet 3 21. The rear end of the support plate 9 extends into the groove 7 and abuts against the front end of the adjusting bolt 6. The middle of the support plate 9 has a protrusion 10 away from the fixed handle 2. The rear end of the movable handle 8 is rotatably connected to the middle of the hinge 11 by rivet 4 22. The front end of the hinge 11 abuts against the protrusion 10. The outer surface of the hinge 11 is covered with a shock-absorbing pad 23. The shock-absorbing pad 23 can buffer the impact force generated by the hinge 11 during opening and closing, reduce hand vibration, improve operating comfort, and extend the service life of the hinge 11.

[0042] Adjusting the screw-in and unscrewing length of adjusting bolt 6 allows for adjustment of the opening size of the fixed jaw 1 and the movable jaw 3. (Refer to...) Figure 1 When the adjusting bolt 6 is screwed into the fixed handle 2, its increased length creates a leftward pushing force on the support plate 9 from its rear end. This force causes the front end of the support plate 9 to rotate clockwise, which in turn causes the front end of the movable handle 8 to rotate clockwise, pushing the movable jaw 3 to rotate clockwise and thus reducing the opening between the movable jaw 3 and the fixed jaw 1. Conversely, when the adjusting bolt 6 is screwed out, the opening between the movable jaw 3 and the fixed jaw 1 is increased.

[0043] Both the fixed handle 2 and the movable handle 8 are equipped with anti-slip rubber pads 25. The anti-slip rubber pads 25 can be designed with a wave shape and a frosted texture according to ergonomics.

[0044] Both the fixed jaw 1 and the movable jaw 3 are fitted with protective rubber sleeves 12 at their front ends. These sleeves 12 cover the outer surface of the clamping plate 4 and are made of soft, highly wear-resistant rubber. This effectively cushions the friction between the workpiece and the clamping plate 4, reducing workpiece wear and increasing the friction between the fixed jaw 1, the movable jaw 3, and the workpiece. Several anti-slip grooves 13 are provided on the opposing surfaces of the two protective rubber sleeves 12. These grooves are evenly spaced and of equal depth from front to back, increasing the friction between the protective rubber sleeves 12 and the workpiece and reducing workpiece slippage during clamping. The protective rubber sleeves 12 are bonded to the clamping plate 4 using an adhesive. Cold-cured adhesive can be used, capable of bonding metal and rubber. After curing, it forms a strong bond with high shear and peel resistance.

[0045] Work process:

[0046] When holding the flat pliers, the palm naturally rests on the anti-slip rubber pad 25 of the gripping parts of the fixed handle 2 and the movable handle 8. The surface of the anti-slip rubber pad 25 provides reliable friction, ensuring that the flat pliers will not easily slip during operation, laying a stable foundation for subsequent operations.

[0047] Place the clamped workpiece between the two clamping plates 4 of the fixed jaw 1 and the movable jaw 3, and adjust the adjusting bolt 6 so that the opening between the fixed jaw 1 and the movable jaw 3 is slightly larger than the workpiece. Since the lubricating oil stored in the oil reservoir 26 of the adjusting bolt 6 can be evenly applied to the contact surface between the adjusting bolt 6 and the groove 7 when the adjusting bolt 6 is rotated, the frictional resistance can be effectively reduced, making the adjustment process smoother.

[0048] Grip the fixed handle 2 and the movable handle 8 firmly, with the rear end of the movable handle 8 facing upwards. Under the gripping force and the supporting force of the support plate 9, the front end of the movable handle 8 pushes the movable jaw 3 forward and downward, causing the movable jaw 3 to rotate clockwise around the anchor nail. The fixed jaw 1 and the movable jaw 3 then close. Figure 1When the workpiece is clamped, a "click" sound will be heard, indicating that the two clamping plates 4 of the fixed jaw 1 and the movable jaw 3 have clamped the workpiece. The "click" sound is produced when the front end of the lifting plate 11 is pressed against the movable handle 8 by the protrusion 10 on the support plate 9. At the same time, the rear end of the lifting plate 11 may also collide with the fixed handle 2. At this time, the movable handle 8, the lifting plate 11, and the support plate 9 are locked. The protective rubber sleeve 12 can protect the workpiece and reduce wear. Pulling down the rear end of the lifting plate 11 causes the rear end of the lifting plate 11 to move downward. Under the action of the lever principle, the front end of the lifting plate 11 exerts an upward force on the support plate 9. The front end of the support plate 9 pulls the movable handle 8 to the right, which in turn pulls the movable jaw 3 to the right. The movable handle 8, the lifting plate 11, and the support plate 9 are unlocked, allowing the fixed jaw 1 and the movable jaw 3 to open to an opening that is only slightly larger than the workpiece initially.

[0049] After use, hook 17 can be hung on a wall or other sturdy support structure to prevent loss.

[0050] During operation, the shock-absorbing pad 23 wrapped around the outer surface of the flap 11 can effectively buffer the impact force generated by the flap 11 during frequent opening and closing, reduce the vibration of the operator's hands, and improve the comfort of operation.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A type of flat pliers, comprising a fixed jaw (1), the rear end of which is connected to a fixed handle (2), the rear end of which is rotatably connected to a movable jaw (3), a flat clamping plate (4) connected to the front end of the fixed jaw (1) and the front end of the movable jaw (3) respectively, and a tension spring (5) provided between the middle of the fixed handle (2) and the movable jaw (3); the rear end of the fixed handle (2) is threadedly connected to an adjusting bolt (6), and a groove (7) is provided on the side of the fixed handle (2) facing the movable handle (8). The front end of the adjusting bolt (6) extends into the groove (7); the movable jaw (3) is rotatably connected to the front end of the movable handle (8), the middle part of the movable handle (8) is rotatably connected to the front end of the support plate (9), the rear end of the support plate (9) extends into the groove (7), the rear end of the support plate (9) abuts against the front end of the adjusting bolt (6), the middle part of the support plate (9) is provided with a protrusion (10) away from the fixed handle (2), the rear end of the movable handle (8) is rotatably connected to the middle part of the lifting piece (11), the front end of the lifting piece (11) abuts against the protrusion (10), characterized in that, The front ends of both the fixed jaw (1) and the movable jaw (3) are fitted with protective rubber sleeves (12), which cover the outer surface of the clamping plate (4).

2. The flat-plate pliers according to claim 1, characterized in that, The protective sleeve (12) is bonded to the clamp (4).

3. The flat-plate pliers according to claim 1, characterized in that, The two protective rubber sleeves (12) have several anti-slip grooves (13) on their opposite surfaces.

4. The flat-plate pliers according to claim 1, characterized in that, The rear end of the adjusting bolt (6) is connected to a ring one (14), which is connected to one end of the wire rope (15), and the other end of the wire rope (15) is connected to a ring two (16), which is connected to a hook (17).

5. A flat-plate pliers according to claim 1, characterized in that, The two flat surfaces facing each other are provided with several rectangular anti-slip protrusions (18), and the inside of the protective rubber sleeve (12) fits into the anti-slip protrusions (18).

6. A flat-plate pliers according to claim 1, characterized in that, The rear end of the fixed jaw (1) is rotatably connected to the movable jaw (3) by rivet one (19), the movable jaw (3) is rotatably connected to the front end of the movable handle (8) by rivet two (20), the middle part of the movable handle (8) is rotatably connected to the front end of the support plate (9) by rivet three (21), and the rear end of the movable handle (8) is rotatably connected to the middle part of the lifting plate (11) by rivet four (22).

7. A flat-plate pliers according to claim 1, characterized in that, The outer surface of the flap (11) is covered with a shock-absorbing pad (23).

8. A flat-plate pliers according to claim 1, characterized in that, Reinforcing ribs (24) are provided at the connection points between the fixed jaws (1) and the movable jaws (3) and the clamping plate (4).

9. A flat-plate pliers according to claim 1, characterized in that, Both the fixed handle (2) and the movable handle (8) are equipped with anti-slip rubber pads (25) on their gripping parts.

10. A flat-plate pliers according to claim 1, characterized in that, An oil reservoir (26) is provided on the outer surface of the adjusting bolt (6), and the oil reservoir (26) is set along the axial direction of the adjusting bolt (6).

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