Quick clamping device

Abstract

The utility model belongs to the technical field of clamping tools, and particularly relates to a quick clamping device, which is characterized by comprising a square rod structure, a positioning structure, a wedge block structure and an adjusting structure, the square rod structure comprises a square rod, a chute on the square rod, a key slot at the end part of the square rod and a thread I, the positioning structure comprises a positioning nut I and a conical surface in the positioning nut I, and the wedge block structure is arranged on the wedge block structure. The limiting screw is arranged on the upper portion of the outer side of the positioning nut I. The wedge block structure comprises a wedge block frame, a wedge block hole and a wedge block, and the adjusting structure comprises a positioning pin, a flat gasket, a compression spring II, a movable clamp body, an adjusting nut and a handle which are sequentially installed on the square rod structure. According to the practical problem that when a clamp is used, the size of an opening needs to be frequently adjusted, time and labor are consumed, a traditional lead screw structure is changed, the movable square rod and the wedge block are matched to achieve the clamping function, and rapid feeding opening and closing are achieved while the same operation habit as the previous operation habit is reserved; convenience is brought to a user to frequently adjust the size of the opening.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamping tools, in particular to a quick clamping device. Background Art

[0002] Bench vises, flat-nose pliers, cutting machines and other equipment are among the tools that are frequently used in mechanical processing and manufacturing and equipment maintenance and repair. They provide reliable clamping and fastening for workpieces, and can meet the requirements of hammering, rotating, cutting, drilling and other force-bearing operations on workpieces. These equipment require the use of various clamps in use, and the clamps are also various in form, size and structure. At present, the clamping and transfer operations of ordinary manual bench vises, flat-nose pliers and cutting machines are basically achieved by rotating a full-length lead screw, and the stroke is relatively long. In actual use, sometimes the jaws need to be frequently switched between large and small opening sizes. From large to small or from small to large, the jaws are opened and closed by manually rotating the lead screw. Since the self-locking function needs to be realized when clamping while realizing the movement, the pitch is generally small, so the moving operation speed is slow, which brings a lot of inconvenience to the user and also affects the work efficiency. Some rely on opening and closing nuts and eccentric wheels to achieve rapid movement and tightening through friction positioning. However, due to structural limitations, they cannot withstand large clamping forces and are easily loosened by vibration, causing workpieces to fall off, be damaged, and injure people. Summary of the invention

[0003] The purpose of the utility model is to provide a quick clamping device. According to the actual problem that the opening size of the clamp needs to be frequently adjusted during use, which is time-consuming and laborious, the traditional screw structure is changed, and a movable square rod and a wedge block are used to cooperate to realize the clamping function. While retaining the same operating habits as before, rapid feeding and opening and closing are achieved, which brings convenience to the user to frequently adjust the opening size.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] The utility model quick clamping device is characterized by comprising a square rod structure, a positioning structure, a wedge block structure and an adjusting structure.

[0006] The square rod structure comprises a square rod, an inclined groove arranged on the square rod, a keyway and a thread I arranged at the end of the square rod,

[0007] The positioning structure includes a positioning nut I, a conical surface arranged inside the positioning nut I, and a limit screw arranged on the upper outer side of the positioning nut I.

[0008] The wedge structure includes a wedge frame, a wedge hole arranged on the wedge frame, a wedge arranged in the wedge hole, and a square hole arranged on the wedge frame.

[0009] The adjustment structure comprises a positioning pin, a flat washer, a compression spring II, a movable clamp body, an adjustment nut and a handle which are sequentially installed on the square rod structure.

[0010] The positioning pin and wedge frame are installed on the square rod, the wedge is installed in the wedge hole, the whole is screwed into the positioning nut I, and then the flat washer and compression spring II are installed in sequence, and then the movable caliper body is installed, and finally the adjusting nut and handle are installed, and the steel ball, compression spring and adjusting screw are installed. The adjusting nut cooperates with the keyway of the square rod to form a steel ball clutch, and the limit screw is installed.

[0011] The adjusting nut is provided with an adjusting screw, a compression spring I and a steel ball. The compression spring I is arranged at the bottom of the adjusting screw, and the bottom of the compression spring I presses the steel ball.

[0012] The handle is installed through the handle hole on the adjusting nut.

[0013] The inclined groove is an inclined groove arranged on the square rod with one side higher than the other side.

[0014] The cross section of the square rod is a square cross section or a polygonal rectangular cross section.

[0015] Advantages of the utility model:

[0016] The utility model discloses a quick clamping device, which changes the traditional screw structure according to the actual problem that the opening size of the clamp needs to be frequently adjusted, which is time-consuming and laborious, and realizes the clamping function by matching a movable square rod and a wedge block, and realizes quick feeding and opening and closing while retaining the same operating habits as before, which brings convenience to the user to frequently adjust the opening size; the mechanism is simple in principle and does not change much to the original structure, and still uses a full-length center rod to ensure the coaxiality of various components; it is easy to operate, has no precision parts in the design, and is easy to process and manufacture; it has a simple structure and high strength, and can meet various rough and violent use conditions of the bench vise, and can clamp tightly and lock reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the square rod of the utility model.

[0018] Figure 2 The utility model is an application structure diagram of the clamping device of the utility model on a bench vise.

[0019] Figure 3 The utility model is a schematic diagram of the working principle of a bench vise.

[0020] Figure 4 It is a structural schematic diagram of the adjustment structure when the utility model is applied to a bench vise.

[0021] Figure 5 This is a schematic diagram of the structure of the positioning nut I of the utility model.

[0022] Figure 6 The utility model is applied to the structure schematic diagram of flat-nose pliers and cutting machine.

[0023] Figure 7 It is a half-section schematic diagram of the utility model applied to flat-nose pliers and a cutting machine. DETAILED DESCRIPTION

[0024] The specific implementation of the present utility model is further described below in conjunction with the accompanying drawings.

[0025] like Figure 1-7 As shown, the quick clamping device of the utility model is characterized by comprising a square rod structure, a positioning structure, a wedge block structure and an adjustment structure.

[0026] The square rod structure comprises a square rod 1, an inclined groove 2 arranged on the square rod 1, a key groove 3 and a thread Ⅰ 4 arranged at the end of the square rod 1,

[0027] The positioning structure includes a positioning nut Ⅰ6, a conical surface 5 arranged inside the positioning nut Ⅰ6, and a limit screw 7 arranged on the upper outer side of the positioning nut Ⅰ6.

[0028] The wedge structure comprises a wedge frame 10, a wedge hole 9 arranged on the wedge frame 10, a wedge 8 arranged in the wedge hole 9, and a square hole 21 arranged on the wedge frame.

[0029] The adjustment structure includes a positioning pin 19, a flat washer 18, a compression spring II 17, a movable caliper body 16, an adjustment nut 14 and a handle 15 which are sequentially installed on the square rod structure.

[0030] The positioning pin 19 and the wedge frame 10 are installed on the square rod 1, the wedge 8 is installed in the wedge hole 9, the whole is screwed into the positioning nut I6, and then the flat washer 18 and the compression spring II 17 are installed in sequence, and then the movable caliper body 16 is installed, and finally the adjusting nut 14 and the handle 15 are installed, and the steel ball 13, the compression spring 12 and the adjusting screw 11 are installed. The adjusting nut 14 cooperates with the square rod keyway 3 to form a steel ball clutch, and the limit screw 7 is installed.

[0031] The adjusting nut 14 is provided with an adjusting screw 11 , a compression spring Ⅰ 12 and a steel ball 13 . The compression spring Ⅰ 12 is arranged at the bottom of the adjusting screw 11 , and the bottom of the compression spring Ⅰ 12 presses the steel ball 13 .

[0032] The handle 15 is installed through the handle hole 20 on the adjusting nut 14 .

[0033] The inclined groove 2 is an inclined groove arranged on the square rod 1 with one side higher than the other side.

[0034] The cross section of the square rod is a square cross section or a polygonal rectangular cross section.

[0035] Figure 1 It is a three-view drawing of a square rod. The square rod 1 is the core component of the clamping device. It is mainly a square rod with an inclined groove 2 with one side higher than the other. When in use, the square rod 1 can stay at any position and cooperate with other parts in the two inclined grooves 2 to form a wedge structure clamp to ensure the axial positioning of the device, and auxiliary structures such as thread Ⅰ4, milling holes, and grooves are turned on the square rod 1 to complete all functions.

[0036] Figure 2 The figure shows the application structure diagram of the clamping device on the bench vise. When installing, first install the positioning nut Ⅰ6 on the bench vise base, install the positioning pin 19 and the wedge frame 10 on the square rod 1, install the steel ball wedge 8 into the wedge hole 9 of the wedge frame, screw the whole into the positioning nut Ⅰ6, and then install the washer 18 and the compression spring Ⅱ17 in sequence, and then install the movable clamp body 16, and finally install the adjusting nut 14 and the handle 15; install the steel ball 13, the compression spring 12 and the adjusting screw 11 on the adjusting nut 14, cooperate with the square rod keyway 3 to form a steel ball clutch, and install the limit screw 7.

[0037] Working principle: two or more tapered cylindrical pins or spherical wedges 8 are used to fill the space between the annular cone surface 5 of the positioning nut Ⅰ6 and the two inclined surfaces of the square rod bevel groove 2 in the form of wedges to complete the axial positioning, and the adjusting nut 14 thread rotates forward on the square rod 1 thread Ⅰ4 to complete the process of moving the clamp forward and clamping the workpiece. Figure 3As shown, in the normal state, the spherical wedge 8 floats in the wedge hole 9 of the wedge frame 10 between the square rod 1 and the positioning nut Ⅰ6. When in the open state, the square rod 1 can move axially without restriction and stop at any position at any time. The wedge 8 will also have enough up and down space in the wedge frame 10 to slide forward and backward in the inclined groove 2 of the square rod 1, and rise or fall with the change of the height of the inclined groove 2 of the square rod 1. The spherical wedge 8 relies on the limited space of the wedge frame 10 and the inclined groove 2 of the square rod 1 to maintain the movement direction. When it is necessary to clamp the workpiece, push the square rod 1 forward until the jaws and the workpiece are in contact and in a clamping and untightened state, rotate the square rod 1 and drive the wedge frame 10 to rotate clockwise through the square hole 21 of the wedge frame 10, the wedge frame 10 is screwed into the positioning nut Ⅰ6, and the wedge frame 10 pushes the wedge 8 to slide forward in the inclined groove 2 of the square rod 1, and approaches the inner inclined surface of the positioning nut Ⅰ6 until it contacts. In the semi-contact state, the spherical wedge 8 can rotate to reduce wear and uniform wear. After contact, the gap between the inner bevel of the positioning nut Ⅰ6, the wedge 8, and the square rod 1 is zero. The wedge 8 is clamped between the two bevels. Restricted by the yield stiffness and hardness of the component material, the front end is limited by the two conical surfaces 5 and the rear end is limited by the thread and has been limited in this position, that is, it cannot move forward or backward. At this time, if the square rod 1 wants to achieve backward movement and unlocking, it is relatively a climbing movement of the conical wedge along the bevel groove 2 of the square rod 1. Since the wedge 8 has no space to be released at this time, the square rod can no longer move backward along the center axis, and the clamping and locking is completed.

[0038] When the square rod 1 drives the wedge frame 10 to rotate clockwise, the adjusting nut 14 is subjected to the pressure of the compression spring 12 of the front-end steel ball clutch, and the forward rotation resistance is greater than the force of the wedge frame 10 thread rotation. The pressure of the steel ball clutch is controlled by the adjusting screw 11, which can complete the control of the pressure from small to large until it is completely locked. In normal operation, it will not rotate before the wedge 8 is clamped. When the wedge 8 just contacts the square rod 1 and the positioning nut I6 and is in a semi-friction state, even if the adjusting nut 14 overcomes the spring pressure to rotate, the jaws have already clamped the parts and cannot move forward. After the positioning nut I6 is screwed in, it is equivalent to pulling the square rod 1 back, and the gap between the inclined surface of the square rod 1 and the wedge 8 is further reduced, thereby completing the locking action. When the clamped workpiece is a workpiece such as rubber or spring that needs to be compressed again, the square rod continues to rotate after the tapered wedge 8 is clamped and locked. Since the wedge 8 has been stuck between the wedge frame 10 and the inner and outer thread nuts, the three are fastened together and cannot rotate. The adjustment nut 14 overcomes the resistance of the steel ball clutch compression spring, and the steel ball 13 moves upward to leave the keyway 3 of the square rod 1 and rotates clockwise together to continue the forward clamping movement of the jaws. If a larger clamping torque is required, the square rod 1 can be changed to a polygonal rectangular cross-section structure, the number of wedges 8 can be increased, or the tapered cylindrical pin-shaped wedge 8 with a larger contact area can be changed to meet the actual working conditions.

[0039] like Figure 4The figure shows a rear view of the clamping device. Under normal circumstances, the compression spring II 17 always pushes the movable clamp body 16 to maintain the maximum opening position. When the rotating adjustment nut 14 has been locked on the front wedge frame 10, the steel ball clutch opens when the rotating adjustment nut 14 is screwed in, overcoming the spring pressure and pushing the movable clamp body 16 forward.

[0040] Figure 6 Figure 7 It is a structural view used in flat-nose pliers and cutting machines, and the structure is simplified. When working, the square rod 1 stays at a certain position as required, and the locking screw 23 and the square rod bevel groove 2 are rotated to achieve the positioning of the positioning nut II 22. The thread II 24 of the center shaft 25 in the shaft hole 26 is rotated as required, and the thread II 24 is moved forward in the inner thread 27 of the square rod to complete the fine adjustment and locking.

[0041] The utility model discloses a quick clamping device, which changes the traditional screw structure according to the actual problem that the opening size of the clamp needs to be frequently adjusted, which is time-consuming and laborious. The movable square rod 1 and the wedge block 8 are used to cooperate to realize the clamping function, and the quick feeding and opening and closing are realized while retaining the same operating habits as before, which brings convenience to the user to frequently adjust the opening size. The mechanism is simple in principle and does not change much to the original structure. A through-length center rod is still used to ensure the coaxiality of various components. The mechanism is easy to operate, has no precision parts in the design, and is easy to process and manufacture. The structure is simple and the strength is high, and it can meet various rough and violent use conditions of the bench vise, and the clamping is tight and the locking is reliable.

Claims

1. A quick clamping device, characterized in that: It includes square rod structure, positioning structure, wedge structure and adjustment structure. The square rod structure comprises a square rod, an inclined groove arranged on the square rod, a keyway and a thread I arranged at the end of the square rod, The positioning structure includes a positioning nut I, a conical surface arranged inside the positioning nut I, and a limit screw arranged on the upper outer side of the positioning nut I. The wedge structure includes a wedge frame, a wedge hole arranged on the wedge frame, a wedge arranged in the wedge hole, and a square hole arranged on the wedge frame. The adjustment structure comprises a positioning pin, a flat washer, a compression spring II, a movable clamp body, an adjustment nut and a handle which are sequentially installed on the square rod structure. The positioning pin and wedge frame are installed on the square rod, the wedge is installed in the wedge hole, the whole is screwed into the positioning nut I, and then the flat washer and compression spring II are installed in sequence, and then the movable caliper body is installed, and finally the adjusting nut and handle are installed, and the steel ball, compression spring and adjusting screw are installed. The adjusting nut cooperates with the keyway of the square rod to form a steel ball clutch, and the limit screw is installed.

2. The quick clamping device according to claim 1, characterized in that: The adjusting nut is provided with an adjusting screw, a compression spring I and a steel ball. The compression spring I is arranged at the bottom of the adjusting screw, and the bottom of the compression spring I presses the steel ball.

3. The quick clamping device according to claim 1, characterized in that: The handle is installed through the handle hole on the adjusting nut.

4. The quick clamping device according to claim 1, characterized in that: The inclined groove is an inclined groove arranged on the square rod with one side higher than the other side.

5. The quick clamping device according to claim 1, characterized in that: The cross section of the square rod is a square cross section or a polygonal rectangular cross section.

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