Clamp for clamping small-sized double-end punching rod

Abstract

The utility model discloses a clamp for clamping a small-sized double-end punching rod. The clamp comprises a clamping plate and a driving mechanism, the two clamping plates are distributed front and back, mounting columns are arranged between the ends of the two clamping plates, clamping holes are formed in the upper surfaces of the clamping plates respectively, the clamping plates are hollow plates, sliding grooves are formed in the inner arc surfaces of the clamping holes respectively, clamping plates are connected into the sliding grooves in a sliding mode, and screw rods are rotationally connected between the upper inner walls and the lower inner walls of the sliding grooves; according to the clamp for clamping the small-sized double-head punching rod, the small-sized double-head punching rod is simple and convenient to clamp and operate, meanwhile, clamping force is more uniformly distributed on the surface of the small-sized double-head punching rod, the clamping force is more uniform, the clamping force is more uniform, the clamping force is more uniform, the clamping force is more uniform, and the service life of the small-sized double-head punching rod is prolonged. And the friction force between the clamping part and the small double-head punching rod is increased, so that the small double-head punching rod is clamped on the clamp more firmly, and the accuracy of the clamping position of the small double-head punching rod is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of punch rod clamps, in particular to a clamp for clamping a small double-headed punch rod. Background Art

[0002] Punches are mold accessories made of high-speed steel, powder high-speed steel, tungsten steel and other molds suitable for steel processing. They are suitable for cold heading, cold extrusion, stamping, hydraulic, injection molding and other processing industries. There are many types of punches. According to the position at work, they can be divided into front punches and rear punches. According to the function of the punches, they can be divided into: shaping punches, positioning punches, hole punches, forming punches, stretching punches, slotting punches, punching punches, etc.; according to the shape, they can be divided into: round punches, plum blossom punches, mother-and-child punches, star-shaped punches and other special-shaped punches. Among them, small double-headed punches are also a kind of punches. When using small double-headed punches, it is necessary to put the small The double-headed punch is clamped on the clamp to fix the position of the small double-headed punch; in the prior art, when the small double-headed punch needs to be clamped, the small double-headed punch is often directly inserted into the clamping hole, and the limit screw on the surface of the clamp is rotated to apply a force to the small double-headed punch, thereby increasing the friction between the small double-headed punch and the clamping hole, thereby clamping the small double-headed punch. Although this clamping method requires fewer operating steps, the clamping force is unevenly distributed on the surface of the small double-headed punch, and the contact area between the clamping component and the small double-headed punch is small, which affects the firmness of the clamping of the small double-headed punch. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a clamp for clamping a small double-headed punch rod. While ensuring the easy operation of clamping the small double-headed punch rod, the clamping force is more evenly distributed on the surface of the small double-headed punch rod, the contact area between the clamping component and the small double-headed punch rod is increased, and the clamping of the small double-headed punch rod on the clamp is more secure, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamp for clamping a small double-headed punch, comprising a clamping plate and a driving mechanism;

[0005] Clamping plates: There are two of them and they are distributed front and back. There are mounting columns between the ends of the two clamping plates. Clamping holes are respectively provided on the upper surfaces of the clamping plates. The clamping plates are all hollow plates. The inner arc surfaces of the clamping holes are respectively provided with sliding grooves. Clamping plates are slidably connected inside the sliding grooves. Screws are rotatably connected between the upper and lower inner walls of the sliding grooves. The thread directions of the upper and lower ends of the screws are opposite. The upper and lower ends of the screws are threadedly connected with slide plates. The slide plates are vertically slidably connected with the sliding grooves. The surfaces of the slide plates are rotatably connected with connecting rotating plates through rotating shaft 1. The two connecting rotating plates located in the same sliding groove are rotatably connected with one clamping plate through rotating shaft 2.

[0006] Driving mechanism: It is arranged inside the clamping plate. The driving mechanism corresponds to the clamping hole one by one. While ensuring the easy operation of clamping the small double-headed punch, the clamping force is more evenly distributed on the surface of the small double-headed punch, increasing the friction between the clamping component and the small double-headed punch, making the clamping of the small double-headed punch on the fixture more secure, and improving the accuracy of the clamping position of the small double-headed punch.

[0007] Furthermore, the driving mechanism includes a swivel, an external gear ring and a gear. The swivel is rotatably connected to the inside of the clamping plate, and the central axis of the swivel is colinear with the central axis of the adjacent clamping hole. The lower end of the outer arc surface of the swivel is provided with an external gear ring, and the lower end of the screw is provided with a gear. The gears are respectively meshed and connected with adjacent external gear rings, so that the clamping plates in the same clamping hole can move synchronously and with the same amplitude.

[0008] Furthermore, the driving mechanism also includes a worm wheel and a worm, the worm wheels are respectively arranged on the upper end of the outer arc surface of the rotating ring, and the worms are respectively rotatably connected to the rotating holes on the surface of the clamping plate, and the worms are respectively meshed and connected with adjacent worm wheels to facilitate the rotation of the rotating ring.

[0009] Furthermore, the driving mechanism also includes a hexagonal head, which is respectively arranged at the end of the worm, so as to facilitate the use of tools to rotate the worm more labor-savingly.

[0010] Furthermore, the side surfaces of the clamping plate close to the central axis of the clamping hole are provided with anti-skid rubber pads and anti-skid protrusions, and the anti-skid protrusions are located inside the anti-skid rubber pads to increase the friction force of the clamping plate surface.

[0011] Furthermore, the side surface of the anti-skid rubber pad close to the central axis of the clamping hole is gradually inclined from top to bottom toward the direction close to the central axis of the clamping hole, thereby reducing the residual air between the anti-skid rubber pad and the small double-headed punch.

[0012] Furthermore, the number of the slide grooves on the arc surface in the clamping hole is three, and the slide grooves in the same clamping hole are distributed in a ring shape with the central axis of the clamping hole as the center, which facilitates the determination of the clamping position of the small double-headed punch.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the clamp for clamping a small double-headed punch has the following advantages:

[0014] When in use, insert the small double-headed punch into the clamping hole, use the hex wrench to turn the hexagonal head, so that the three clamping plates distributed in a ring with the clamping hole as the center move synchronously and with the same amplitude in the direction close to the small double-headed punch. During the movement of the clamping plates, the anti-slip rubber pad gradually contacts the small double-headed punch from the lower end to avoid residual air between the anti-slip rubber pad and the surface of the small double-headed punch, until the three ring-shaped clamping plates clamp the small double-headed punch in the center of the clamping hole. While ensuring the easy operation of clamping the small double-headed punch, the clamping force is more evenly distributed on the surface of the small double-headed punch, increasing the friction between the clamping component and the small double-headed punch, making the clamping of the small double-headed punch on the fixture more secure, and improving the accuracy of the clamping position of the small double-headed punch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the clamping hole of the utility model in a top view;

[0017] Figure 3 It is a structural schematic diagram of the front view cross section of the clamping hole of the utility model.

[0018] In the figure: 1 clamping plate, 2 mounting column, 3 clamping hole, 4 slide groove, 5 clamping plate, 6 screw rod, 7 slide plate, 8 connecting rotating plate, 9 driving mechanism, 91 rotating ring, 92 outer gear ring, 93 gear, 94 worm wheel, 95 worm, 96 hexagon socket head, 10 anti-skid rubber pad, 11 anti-skid protrusion. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 , This embodiment provides a technical solution: a clamp for clamping a small double-headed punch, comprising a clamping plate 1 and a driving mechanism 9;

[0021] Clamping plates 1: There are two of them and they are distributed front and back. A mounting column 2 is provided between the ends of the two clamping plates 1 to facilitate fixing the position of the clamp. Clamping holes 3 are provided on the upper surfaces of the clamping plates 1 to provide space for clamping a small double-headed punch. The clamping plates 1 are all hollow plates. The inner arc surfaces of the clamping holes 3 are provided with slide grooves 4. The insides of the slide grooves 4 are slidably connected with clamping plates 5. The upper and lower inner walls of the slide grooves 4 are rotatably connected with screw rods 6. The thread directions of the upper and lower ends of the screw rods 6 are opposite. The upper and lower ends of the screw rods 6 are threadedly connected with The slide plate 7 is vertically slidably connected with the slide groove 4. The surface of the slide plate 7 is rotatably connected with a connecting rotating plate 8 through a rotating shaft 1. The two connecting rotating plates 8 located in the same slide groove 4 are rotatably connected with a clamping plate 5 through a rotating shaft 2. When the screw rod 6 rotates, the screw rod 6 is connected with the slide plate 7 through the threaded connection. Because the thread directions of the upper and lower ends of the screw rod 6 are opposite, under the limit of the slide groove 4, the two slide plates 7 in the same slide groove 4 are driven to approach each other. Through the rotation connection of the connecting rotating plate 8, the clamping plate 5 is moved toward the direction close to the small double-headed punch. The clamping plate 5 is used to clamp the small double-headed punch, and the side of the clamping plate 5 close to the central axis of the clamping hole 3 is provided with an anti-skid rubber pad 10 and an anti-skid protrusion 11. The anti-skid protrusion 11 is located inside the anti-skid rubber pad 10 to increase the friction between the small double-headed punch and the clamping plate 5. The side of the anti-skid rubber pad 10 close to the central axis of the clamping hole 3 gradually tilts from top to bottom toward the direction close to the central axis of the clamping hole 3. During the movement of the clamping plate 5, the lower end of the anti-skid rubber pad 10 first contacts the small double-headed punch, and as the clamping plate 5 moves Continue to move, the anti-skid rubber pad 10 is completely in contact with the small double-headed punch rod, avoiding the residual air between the anti-skid rubber pad 10 and the surface of the small double-headed punch rod, and improving the friction between the anti-skid rubber pad 10 and the small double-headed punch rod. The number of the slide grooves 4 on the arc surface of the clamping hole 3 is three, and the slide grooves 4 in the same clamping hole 3 are distributed in an annular shape with the central axis of the clamping hole 3 as the center. Through the cooperation of three annularly distributed clamping plates 5, the small double-headed punch rod is firmly clamped in the center position of the clamping hole 3, and the clamping position of the small double-headed punch rod is more accurate;

[0022] Driving mechanism 9: arranged inside the clamping plate 1, the driving mechanism 9 corresponds to the clamping hole 3 one by one, the driving mechanism 9 includes a rotating ring 91, an outer gear ring 92 and a gear 93, the rotating ring 91 is respectively rotatably connected to the inside of the clamping plate 1, the central axis of the rotating ring 91 is collinear with the central axis of the adjacent clamping hole 3, the lower end of the outer arc surface of the rotating ring 91 is provided with an outer gear ring 92, the lower end of the screw 6 is provided with a gear 93, the gear 93 is respectively meshed and connected with the adjacent outer gear ring 92, the driving mechanism 9 also includes a worm gear 94 and a worm 95, the worm gear 94 is respectively arranged at the upper end of the outer arc surface of the rotating ring 91, and the worm 95 is respectively rotatably connected to the surface of the clamping plate 1 In the rotating hole of the surface, the worm 95 is meshed and connected with the adjacent worm wheel 94, and the driving mechanism 9 also includes an inner hexagon head 96, which is respectively arranged at the end of the worm 95. The working principle of the rod clamp is as follows: when in use, a small double-headed punch is inserted into the clamping hole 3, and the inner hexagon head 96 is rotated with a hexagonal wrench to drive the worm 95 to rotate. Through the meshing connection between the worm 95 and the worm wheel 94, the worm wheel 94 drives the rotating ring 91 and the outer gear ring 92 to rotate. Through the meshing connection between the outer gear ring 92 and the gear 93, the three gears 93 distributed in a ring with the clamping hole 3 as the center are driven to rotate, and the gear 93 drives the screw 6 to rotate.

[0023] The working principle of a clamp for clamping a small double-headed punch provided by the utility model is as follows: when in use, the small double-headed punch is inserted into the clamping hole 3, and the hexagonal head 96 is rotated with a hexagonal wrench to drive the worm 95 to rotate. The meshing connection between the worm 95 and the worm wheel 94 drives the swivel 91 and the outer gear ring 92 to rotate. The meshing connection between the outer gear ring 92 and the gear 93 drives the three gears 93 distributed in a ring with the clamping hole 3 as the center to rotate. The gear 93 drives the screw rod 6 to rotate. Through the threaded connection between the screw rod 6 and the slide plate 7, because the thread directions of the upper and lower ends of the screw rod 6 are opposite, under the limit of the slide groove 4, the same gear 93 is driven. The two slides 7 in the slide groove 4 are close to each other, and the rotation connection of the connecting turn plate 8 allows the clamping plate 5 to move toward the direction close to the small double-headed punch. During the movement of the clamping plate 5, the lower end of the anti-skid rubber pad 10 first contacts the small double-headed punch. As the clamping plate 5 continues to move, the anti-skid rubber pad 10 completely contacts the small double-headed punch, avoiding residual air between the anti-skid rubber pad 10 and the surface of the small double-headed punch, thereby increasing the friction between the anti-skid rubber pad 10 and the small double-headed punch, until the small double-headed punch is firmly clamped in the center position of the clamping hole 3 through the cooperation of the three annularly distributed clamping plates 5, and the clamping position of the small double-headed punch is more accurate.

[0024] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fixture for clamping a small double-ended punch, characterized in that: It comprises a clamping plate (1) and a driving mechanism (9); Clamping plates (1): There are two of them and they are distributed front and back. A mounting column (2) is provided between the ends of the two clamping plates (1). Clamping holes (3) are provided on the upper surfaces of the clamping plates (1). The clamping plates (1) are all hollow plates. The inner arc surfaces of the clamping holes (3) are respectively provided with slide grooves (4). Clamping plates (5) are slidably connected inside the slide grooves (4). A screw rod (6) is rotatably connected between the upper and lower inner walls of the slide grooves (4). The threads of the upper and lower ends of the screw rod (6) are in opposite directions. The upper and lower ends of the screw rod (6) are threadedly connected with a slide plate (7). The slide plate (7) is vertically slidably connected to the slide groove (4). The surfaces of the slide plates (7) are rotatably connected to a connecting rotating plate (8) via a rotating shaft 1. The two connecting rotating plates (8) located in the same slide groove (4) are rotatably connected to one clamping plate (5) via a rotating shaft 2. Driving mechanism (9): arranged inside the clamping plate (1), the driving mechanism (9) corresponds to the clamping hole (3) in a one-to-one manner.

2. A fixture for clamping a small double-ended punch according to claim 1, characterized in that: The driving mechanism (9) comprises a rotating ring (91), an outer toothed ring (92) and a gear (93); the rotating ring (91) is rotatably connected to the inside of the clamping plate (1); the central axis of the rotating ring (91) is colinear with the central axis of the adjacent clamping hole (3); the lower end of the outer arc surface of the rotating ring (91) is provided with an outer toothed ring (92); the lower end of the screw rod (6) is provided with a gear (93); the gear (93) is meshedly connected with the adjacent outer toothed ring (92).

3. A fixture for clamping a small double-ended punch according to claim 2, characterized in that: The driving mechanism (9) further comprises a worm wheel (94) and a worm (95); the worm wheels (94) are respectively arranged at the upper end of the outer arc surface of the rotating ring (91); the worm wheels (95) are respectively rotatably connected to the rotating holes on the surface of the clamping plate (1); and the worm wheels (95) are respectively meshed and connected with adjacent worm wheels (94).

4. A fixture for clamping a small double-ended punch according to claim 3, characterized in that: The driving mechanism (9) further comprises a hexagonal socket head (96), wherein the hexagonal socket heads (96) are respectively arranged at the ends of the worm (95).

5. A fixture for clamping a small double-ended punch according to claim 1, characterized in that: The side surfaces of the clamping plate (5) close to the central axis of the clamping hole (3) are provided with anti-skid rubber pads (10) and anti-skid protrusions (11), and the anti-skid protrusions (11) are located inside the anti-skid rubber pads (10).

6. A fixture for clamping a small double-ended punch according to claim 5, characterized in that: The side surface of the anti-slip rubber pad (10) close to the central axis of the clamping hole (3) is gradually inclined from top to bottom towards the direction close to the central axis of the clamping hole (3).

7. A fixture for clamping a small double-ended punch according to claim 1, characterized in that: The number of the sliding grooves (4) on the inner arc surface of the clamping hole (3) is three, and the sliding grooves (4) in the same clamping hole (3) are distributed in a ring shape with the central axis of the clamping hole (3) as the center.

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