Punch pulling device

Abstract

The utility model discloses a punch pulling device, which relates to the technical field of punch replacement and comprises a tubular sleeve, a clamping block is arranged on the inner side of the sleeve, a through groove is arranged on the peripheral side of the sleeve, a curved connecting plate is movably connected in the through groove through a first rotating shaft, the bottom end of the connecting plate is movably connected with the clamping block, and the bottom end of the connecting plate is movably connected with the clamping block. According to the utility model, the sleeve is arranged, the clamping block is arranged on the inner side of the sleeve, the connecting plate for driving the clamping block and the knob are arranged on the sleeve, the sleeve is sleeved outside the punch, and the knob is rotated, so that the punch can be clamped in the clamping block, and the punch can be clamped in the clamping block. When the punch is pulled out, the clamping block is pushed out of the groove by the connecting plate to be in contact with the punch, so that the punch is clamped and fixed, then the grip is held and lifted upwards, the punch is pulled out of the punch seat, operation is easy and convenient, the effective clamping face is enlarged through the clamping block, clamping is stable, the punch is not prone to slipping, and the pulling-out success rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of punch replacement technology, specifically a punch lifting device. Background Technology

[0002] A punch is a metal part on a stamping die in a machine tool. It is also called a punch bar, punch needle, or punch. It needs to be installed on the punch holder of the stamping die equipment. As the stamping process continues for a long time, the punch will wear out and need to be replaced. The commonly used punch holder is a ball lock structure. When replacing the punch, the ball inside the punch holder may get stuck, making it difficult to pull out the punch. Therefore, it is necessary to use a pulling device to pull out the punch.

[0003] The prior art disclosure number CN207592575U describes a punch removal device for fin mold punching punches and dies. This device has a simple structure, but in use, the punch is only fixed by a side top screw. The force applied when clamping and fixing the punch is uneven, and the clamping stability is poor. This makes it easy for the device to slip off the punch during extraction, resulting in extraction failure. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, such as unstable clamping and easy slippage, and to provide a punch pulling device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a punch pulling device, comprising a sleeve, the sleeve being tubular, a clamping block provided on the inner side of the sleeve, a through groove opened on the periphery of the sleeve, a curved connecting plate movably connected to the through groove via a first rotating shaft, and the bottom end of the connecting plate being movably connected to the clamping block, a movable block provided near the top of the sleeve, a slot opened on the movable block, and the top end of the connecting plate being connected to the slot, a screw threadedly connected to the middle of the movable block, the top of the sleeve being closed, a fixing plate fixedly connected to the inner side of the sleeve, the movable block being located above the fixing block, and the through groove extending above the fixing block, the two ends of the screw being movably connected to the top end of the sleeve and the fixing plate respectively via bearings, and a knob fixedly connected to the top end of the screw extending outside the sleeve.

[0006] As described above, there are several clamping blocks arranged in a circular array, and there are several through slots, each of which is movably connected to a connecting plate, and the connecting plate is movably connected to the adjacent clamping block.

[0007] As described above, the connecting plate is provided with a sliding groove, the sliding groove is located above the first rotating shaft, and a fixed rod is provided in the sliding groove, and the fixed rod is fixedly connected to the movable block.

[0008] As described above, the movable block has several through holes, which are spaced apart between several slots. A vertical rod is provided in each through hole, and the two ends of the vertical rod are fixedly connected to the top of the sleeve and the fixed plate, respectively.

[0009] As described above, the side of the clamping block away from the connecting plate is an arc surface, and a rubber pad is fixedly connected to the arc surface side. The side of the rubber pad away from the clamping block is serrated.

[0010] As described above, the inner wall of the sleeve is provided with a number of grooves, which are distributed in a circular array, and a number of clamping blocks are evenly distributed in the grooves. The serrated surface of the rubber pad is flush with the inner wall of the sleeve.

[0011] As described above, the bottom end of the connecting plate has a through hole, a second rotating shaft is inserted into the through hole, and the second rotating shaft is fixedly connected to the clamping block. A torsion spring is sleeved on the second rotating shaft.

[0012] Compared with the prior art, this punch pulling device has the following advantages: By setting a sleeve with a clamping block inside the sleeve, and a connecting plate and knob on the sleeve to drive the clamping block, the sleeve is placed over the punch. By rotating the knob, the connecting plate pushes the clamping block out of the groove and into contact with the punch, thereby clamping and fixing the punch. Then, by holding the handle and lifting it upward, the punch is pulled out of the punch seat. The operation is simple, and the clamping block increases the effective clamping area. The force is applied evenly during clamping, making the clamping stable and less prone to slippage, thus improving the success rate of pulling out the punch.

[0013] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the connection structure between the connecting plate and the movable block of this utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure of the connecting plate and clamping block of this utility model.

[0018] In the diagram: 1. Sleeve; 2. Handle; 3. Knob; 4. Connecting plate; 5. Clamping block; 6. Rubber pad; 7. Fixing plate; 8. Movable block; 9. Screw; 10. Fixing rod; 11. Torsion spring; 12. Vertical rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-4 As shown, this utility model provides a punch lifting device technical solution: a punch lifting device includes a sleeve 1, the sleeve 1 is tubular, a clamping block 5 is provided on the inner side of the sleeve 1, a through groove is opened on the periphery of the sleeve 1, a curved connecting plate 4 is movably connected to the through groove through a first rotating shaft, and the bottom end of the connecting plate 4 is movably connected to the clamping block 5, a movable block 8 is provided near the top of the sleeve 1, a slot is opened on the movable block 8, and the top end of the connecting plate 4 is connected to the slot, a screw 9 is threadedly connected to the middle of the movable block 8, the top of the sleeve 1 is closed, a fixing plate 7 is fixedly connected to the inner side of the sleeve 1, the movable block 8 is located above the fixing block, and the through groove extends to the top of the fixing block, the two ends of the screw 9 are movably connected to the top end of the sleeve 1 and the fixing plate 7 respectively through bearings, and a knob 3 is fixedly connected to the top end of the screw 9 outside the sleeve 1.

[0021] According to the overall structure of the device, when in use, sleeve 1 is placed on the outside of the punch, and knob 3 is turned to drive screw 9 to rotate, causing movable block 8 to move upward and drive connecting plate 4 to deflect upward, so that the bottom end of connecting plate 4 deflects closer to the punch, thereby driving clamping block 5 to contact the punch and clamping and fixing the punch. Then, grasp handle 2 and lift upward to pull the punch out of the punch seat.

[0022] like Figure 2 As shown, there are several clamping blocks 5, which are arranged in a circular array. There are several through slots, and each through slot is movably connected to a connecting plate 4, which is movably connected to the adjacent clamping block 5.

[0023] By setting multiple clamping blocks 5, the punch is clamped from multiple directions, increasing the effective clamping surface between the clamping blocks 5 and the punch, thereby strengthening the clamping force, making it less prone to loosening, and applying force evenly to the punch when pulling it out, making it less likely to damage the punch.

[0024] like Figure 3 As shown, a sliding groove is provided on the connecting plate 4. The sliding groove is located above the first rotating shaft. A fixed rod 10 is provided in the sliding groove, and the fixed rod 10 is fixedly connected to the movable block 8.

[0025] Rotating the knob 3 drives the screw 9 to rotate, thereby moving the movable block 8 upward and driving the fixed rod 10 upward. At the same time, the fixed rod 10 is located in the slide groove, so that when the fixed rod 10 moves upward, it will push the connecting plate 4 to deflect around the first axis, thereby moving the clamping block 5 out of the groove and clamping the punch.

[0026] like Figure 2 As shown, the movable block 8 has several through holes, which are spaced apart between several slots. A vertical rod 12 is installed in the through hole, and the two ends of the vertical rod 12 are fixedly connected to the top of the sleeve 1 and the fixed plate 7, respectively.

[0027] The vertical rod 12 limits the movement of the movable block 8 to prevent it from deflecting when moving up and down.

[0028] like Figure 2 , 4 As shown, the side of the clamping block 5 away from the connecting plate 4 is arc-shaped, and a rubber pad 6 is fixedly connected to the arc-shaped side. The side of the rubber pad 6 away from the clamping block 5 is serrated. Several grooves are opened on the inner wall of the sleeve 1. The grooves are arranged in a circular array, and several clamping blocks 5 are evenly distributed in the grooves. The serrated surface of the rubber pad 6 is flush with the inner wall of the sleeve 1. A through hole is opened at the bottom of the connecting plate 4. A second rotating shaft is inserted into the through hole and is fixedly connected to the clamping block 5. A torsion spring 11 is sleeved on the second rotating shaft.

[0029] The roughness of the clamping surface of the clamping block 5 is increased by the serrated rubber pad 6, thereby increasing the friction during clamping and enhancing the clamping stability. The rubber pad 6 also prevents excessive force from damaging the punch during clamping. The clamping block 5 is hidden by the groove, and the rubber pad 6 fits against the inner wall of the sleeve 1 to prevent the sleeve 1 from fitting outside the punch and causing collision between the clamping block 5 and the punch. The second rotating shaft makes the connecting plate 4 movably connected to the clamping block 5, so that when the connecting plate 4 drives the clamping block 5 to deflect and contact the punch, the clamping block 5 can deflect autonomously under the reaction force generated at the time of contact, so that the rubber pad 6 fits tightly against the punch. At the same time, the autonomous deflection of the clamping block 5 will compress the torsion spring 11, so that after the connecting plate 4 drives the clamping block 5 to relax, the clamping block 5 will automatically return to its original position, so that the rubber pad 6 is flush with the inner wall of the sleeve 1.

[0030] Working principle: When in use, sleeve 1 is placed on the outside of the punch. Turning knob 3 drives screw 9 to rotate, causing movable block 8 to move upward. When movable block 8 moves upward, it drives fixed rod 10 to move upward, thereby pushing the upper end of connecting plate 4 to deflect upward, causing connecting plate 4 to rotate around the first axis. This causes the bottom end of connecting plate 4 to deflect closer to the punch, and causes clamping block 5 to contact the punch. After clamping block 5 contacts the punch, as connecting plate 4 deflects, it deflects around the second axis under the reaction force, causing rubber pad 6 to stick tightly to the punch, thereby clamping and fixing the punch. Then, hold handle 2 and lift upward to pull the punch out of the punch seat.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A punch pulling device, comprising a sleeve (1), characterized in that: The sleeve (1) is tubular, and a clamping block (5) is provided on the inner side of the sleeve (1). A through groove is provided on the periphery of the sleeve (1). A curved connecting plate (4) is movably connected to the through groove through a first rotating shaft. The bottom end of the connecting plate (4) is movably connected to the clamping block (5). A movable block (8) is provided near the top of the sleeve (1). A slot is provided on the movable block (8). The top end of the connecting plate (4) is connected to the slot. A screw (9) is threadedly connected to the middle of the movable block (8). The top of the sleeve (1) is closed. A fixing plate (7) is fixedly connected to the inner side of the sleeve (1). The movable block (8) is located above the fixing block. The through groove extends to the top of the fixing block. The two ends of the screw (9) are movably connected to the top end of the sleeve (1) and the fixing plate (7) respectively through bearings. A knob (3) is fixedly connected to the top end of the screw (9) outside the sleeve (1).

2. The punch pulling device according to claim 1, characterized in that: The clamping blocks (5) are provided in a plurality of manner, and the plurality of clamping blocks (5) are arranged in a circular array. The through slots are provided in a plurality of manner, and each of the plurality of through slots is movably connected to a connecting plate (4), and the connecting plate (4) is movably connected to the adjacent clamping block (5).

3. The punch pulling device according to claim 1, characterized in that: The connecting plate (4) is provided with a sliding groove, which is located above the first rotating shaft. A fixed rod (10) is provided in the sliding groove, and the fixed rod (10) is fixedly connected to the movable block (8).

4. The punch pulling device according to claim 1, characterized in that: The movable block (8) has several through holes, which are spaced apart between several slots. A vertical rod (12) is provided in the through hole, and the two ends of the vertical rod (12) are fixedly connected to the top of the sleeve (1) and the fixing plate (7) respectively.

5. The punch pulling device according to claim 1, characterized in that: The side of the clamping block (5) away from the connecting plate (4) is an arc surface, and a rubber pad (6) is fixedly connected to the arc surface side. The side of the rubber pad (6) away from the clamping block (5) is serrated.

6. The punch pulling device according to claim 5, characterized in that: The inner wall of the sleeve (1) has several grooves arranged in a circular array, and several clamping blocks (5) are evenly distributed in the grooves. The serrated surface of the rubber pad (6) is flush with the inner wall of the sleeve (1).

7. The punch pulling device according to claim 1, characterized in that: The bottom end of the connecting plate (4) has a through hole, a second rotating shaft is inserted into the through hole, and the second rotating shaft is fixedly connected to the clamping block (5). A torsion spring (11) is sleeved on the second rotating shaft.

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