Automatic clamping structure of cold header

Abstract

The utility model discloses an automatic clamping structure of a cold header, and relates to the technical field of cold header equipment. Comprising a mounting plate and a connecting plate integrally connected with the mounting plate, two symmetrically-arranged first connecting rods are hinged to the front side of the bottom end of the mounting plate, second connecting rods parallel to the first connecting rods are hinged to the rear side of the mounting plate, a mounting groove is formed between the first connecting rods and the second connecting rods which are arranged in parallel, and a swing rod is hinged to the interior of the mounting groove; the automatic clamping structure of the cold header comprises a connecting plate, a swing rod is arranged on the connecting plate, the swing rod is integrally connected with a clamping rod located below the first connecting rod, the top end of the swing rod is hinged to a connecting rod, a pull rod with the end penetrating through the connecting plate is arranged on the top of the connecting plate in a liftable mode, and the pull rod drives the two connecting rods to move relatively through a gear and rack rod mechanism. The clamping rods can be driven to move in the swinging process of the swing rods, so that the distance between the oppositely-arranged clamping rods is adjusted, and the clamping device can be suitable for clamping workpieces of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading machine equipment, in particular to an automatic clamping structure of a cold heading machine. Background Art

[0002] Cold heading machine is a special equipment mainly used for batch production of nuts, bolts and other fasteners. According to the theory of metal plastic deformation, a certain pressure is applied to the metal blank at room temperature to make it plastically deform in the die cavity and form it into the specified shape and size. When processing fasteners, it is necessary to use the cold heading device of the cold heading machine for processing. During production, the cold heading machine clamps the material (bar or wire) to the die position through the clamping claws, and then the material is stamped and formed by the cooperation of the movable die and the die.

[0003] The patent document with application number CN202122448393.0 discloses a method of clamping materials of different sizes by means of elastic parts to expand the adaptability of the equipment. However, when clamping larger materials by means of elastic parts, the elastic parts shrink more and can clamp the workpiece more firmly. When clamping smaller materials, the elastic parts shrink less or even do not shrink, and the materials cannot be clamped stably at this time. Utility Model Content

[0004] The utility model provides an automatic clamping structure for a cold heading machine to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic clamping structure of a cold heading machine, comprising a mounting plate and a connecting plate integrally connected to the mounting plate, the bottom front side of the mounting plate is hinged with two symmetrically arranged first connecting rods, the rear side of the mounting plate is hinged with a second connecting rod arranged parallel to the first connecting rod, a mounting groove is formed between the first and second connecting rods arranged in parallel, a rocker arm is hinged in the mounting groove, the rocker arm is integrally connected with a clamping rod located below the first connecting rod, the top end of the rocker arm is hinged to a connecting rod, the top of the connecting plate is liftable and provided with a pull rod whose end passes through the connecting plate, the pull rod drives the two connecting rods to move relative to each other through a gear and rack mechanism, so that the clamping rod moves relative to each other for clamping.

[0006] Furthermore, the gear and rack mechanism includes a fixed fan gear, a movable rod, a rack and a fixed block. The top ends of the two connecting rods are connected to fan gears rotatably connected to the mounting plate, the bottom end of the pull rod is fixedly connected to a fixed block, the bottom end of the fixed block is fixedly connected to the movable rod located on the two fan gears, and racks meshing with the fan gears are arranged on both sides of the movable rod.

[0007] Furthermore, a spring connected to the connecting plate is installed on the top of the fixing block.

[0008] Furthermore, the clamping rod is L-shaped as a whole.

[0009] Furthermore, a clamping groove is formed on one arm of the clamping rod away from the swing rod.

[0010] Furthermore, a linear bearing cooperating with the pull rod is installed on the top of the connecting plate.

[0011] Compared with the prior art, the utility model provides an automatic clamping structure for a cold heading machine, which has the following beneficial effects: the automatic clamping structure for the cold heading machine drives the two connecting rods to move relative to each other by lifting and lowering the pull rod, and can drive the clamping rod to move during the swing of the swing rod, so as to adjust the distance between the relatively arranged clamping rods, and can be suitable for clamping workpieces of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the movable rod of the utility model.

[0015] In the figure: 1. mounting plate; 2. connecting plate; 3. first connecting rod; 4. second connecting rod; 5. mounting groove; 6. rocker arm; 7. connecting rod; 8. fan gear; 9. movable rod; 10. rack; 11. fixing block; 12. pull rod; 13. spring; 14. clamping rod; 15. clamping groove; 16. linear bearing. DETAILED DESCRIPTION

[0016] 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.

[0017] See also Figure 1-3The utility model discloses an automatic clamping structure of a cold heading machine, comprising a mounting plate 1 and a connecting plate 2 integrally connected to the mounting plate 1, the bottom front side of the mounting plate 1 is hinged with two symmetrically arranged first connecting rods 3, the rear side of the mounting plate 1 is hinged with a second connecting rod 4 arranged in parallel with the first connecting rod 3, a mounting groove 5 is formed between the first connecting rod 3 and the second connecting rod 4 arranged in parallel, a swing rod 6 is hinged in the mounting groove 5, the swing rod 6 is integrally connected with a clamping rod 14 located below the first connecting rod 3, the top of the swing rod 6 is hinged with a connecting rod 7, the top of the connecting plate 2 is liftable and provided with a pull rod 12 whose end passes through the connecting plate 2, the pull rod 12 drives the two connecting rods 7 to move relative to each other through a gear and rack mechanism, so that the clamping rod 14 moves relative to each other for clamping work, the automatic clamping structure of the cold heading machine drives the two connecting rods 7 to move relative to each other through the lifting and lowering of the pull rod 12, and can drive the clamping rod 14 to move during the swinging of the swing rod 6, so as to adjust the distance between the relatively arranged clamping rods 14, and can be suitable for clamping workpieces of different sizes.

[0018] The pull rod 12 is used to be connected to the clamping table of the cold heading machine, and the clamping table of the cold heading machine drives the pull rod 12 to rise and fall so as to control the two clamping rods 14 to clamp and release the material.

[0019] Specifically, the gear and rack mechanism includes a fixed fan gear 8, a movable rod 9, a rack 10 and a fixed block 11. The top ends of the two connecting rods 7 are connected to the fan gears 8 rotatably connected to the mounting plate 1. The bottom end of the pull rod 12 is fixedly connected to the fixed block 11. The bottom end of the fixed block 11 is fixedly connected to the movable rod 9 located on the two fan gears 8. Racks 10 meshing with the fan gears 8 are arranged on both sides of the movable rod 9.

[0020] In this embodiment, when the pull rod 12 drives the movable rod 9 to move, the movable rod 9 will drive the connecting rod 7 to swing through the rack 10 meshing with the transmission fan gear 8, and the connecting rod 7 will drive the rocker rod 6 to swing, so that the two clamping rods 14 move relative to each other, thereby realizing the clamping and releasing operations of the material.

[0021] A sufficient distance is left between the bottom end of the movable rod 9 and the two first connecting rods 3 to prevent the movable rod 9 from contacting the first connecting rods 3 during the downward movement.

[0022] Specifically, a spring 13 connected to the connecting plate 2 is installed on the top of the fixing block 11 .

[0023] In this embodiment, the provision of the spring 13 can facilitate the movement and reset of the pull rod 12 .

[0024] Specifically, the clamping rod 14 is L-shaped as a whole.

[0025] The arm of the clamping rod 14 away from the swing rod 6 is provided with a clamping groove 15 .

[0026] In this embodiment, the clamping groove 15 is arc-shaped, and two symmetrically arranged clamping rods 14 cooperate with the clamping groove 15 to clamp the material.

[0027] Specifically, a linear bearing 16 matched with the pull rod 12 is installed on the top of the connecting plate 2 .

[0028] In this embodiment, the provision of the linear bearing 16 facilitates smoother lifting and lowering of the pull rod 12 .

[0029] To sum up, the automatic clamping structure of the cold heading machine drives the two connecting rods 7 to move relative to each other by lifting and lowering the pull rod 12, so that the clamping rod 14 can be driven to move during the swing of the swing rod 6, so as to adjust the distance between the relatively set clamping rods 14, and can be suitable for clamping workpieces of different sizes.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic clamping structure for a cold heading machine, comprising a mounting plate (1) and a connecting plate (2) integrally connected to the mounting plate (1), characterized in that: The bottom front side of the mounting plate (1) is hinged with two symmetrically arranged first connecting rods (3), and the rear side of the mounting plate (1) is hinged with a second connecting rod (4) arranged in parallel with the first connecting rod (3). A mounting groove (5) is formed between the first connecting rod (3) and the second connecting rod (4) arranged in parallel. A swing rod (6) is hinged in the mounting groove (5). The swing rod (6) is integrally connected with a clamping rod (14) located below the first connecting rod (3). The top end of the swing rod (6) is hinged with a connecting rod (7). The top of the connecting plate (2) is liftable and provided with a pull rod (12) whose end passes through the connecting plate (2). The pull rod (12) drives the two connecting rods (7) to move relative to each other through a gear and rack mechanism, so that the clamping rod (14) moves relative to each other to perform clamping work.

2. The automatic clamping structure of a cold heading machine according to claim 1, characterized in that: The gear and rack mechanism comprises a fixed fan gear (8), a movable rod (9), a rack (10) and a fixed block (11); the top ends of the two connecting rods (7) are connected to fan gears (8) rotatably connected to the mounting plate (1); the bottom end of the pull rod (12) is fixedly connected to the fixed block (11); the bottom end of the fixed block (11) is fixedly connected to the movable rod (9) located on the two fan gears (8); and racks (10) meshing with the fan gears (8) are arranged on both sides of the movable rod (9).

3. The automatic clamping structure of a cold heading machine according to claim 2, characterized in that: A spring (13) connected to the connecting plate (2) is installed on the top of the fixing block (11).

4. The automatic clamping structure of a cold heading machine according to claim 1, characterized in that: The clamping rod (14) is L-shaped as a whole.

5. The automatic clamping structure of a cold heading machine according to claim 4, characterized in that: The arm of the clamping rod (14) away from the swing rod (6) is provided with a clamping groove (15).

6. The automatic clamping structure of a cold heading machine according to claim 1, characterized in that: A linear bearing (16) matched with the pull rod (12) is installed on the top of the connecting plate (2).

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