CN213857129U - Three-jaw self-centering chuck for fixing clamping jaws - Google Patents

Abstract

The utility model discloses a fixed jack catch three-jaw self-centering chuck, including dish shell and driven gear, the inboard upper end of dish shell is provided with the motor, and one side of motor is connected with the driving gear, driven gear sets up in one side of little bevel gear, and the middle part lower extreme of little bevel gear is connected with big bevel gear, big bevel gear's the outside is provided with gear thread, and gear thread's the outside is hugged closely there is the clamping screw thread, the outside of clamping screw thread is connected with the jack catch, and the outside middle part of jack catch is provided with the clamping cunning concave. This fixed jack catch three-jaw automatic centering chuck is provided with the motor, and the motor passes through the driving gear and constitutes meshing transmission structure with driven gear, and meshing transmission structure makes bevel pinion's motion no longer lean on to use manual, has reduced the whole injury to the people of chuck at the function in-process of lathe, also provides controllable power for tightening up of jack catch, and the whole use of chuck becomes simple convenient.

Description

Three-jaw self-centering chuck for fixing clamping jaws

Technical Field

The utility model relates to a chuck technical field specifically is a fixed jack catch three-jaw self-centering chuck.

Background

Chucks are today mechanical devices on machine tools for clamping workpieces. The machine tool accessory clamps and positions a workpiece by utilizing the radial movement of movable clamping jaws uniformly distributed on a chuck body. The chuck generally comprises a chuck body, movable jaws and a jaw driving mechanism 3. The diameter of the chuck body is 65 mm at least and can reach 1500 mm at most, and a through hole is formed in the center of the chuck body so as to facilitate the workpiece or bar stock to pass through; the back part is provided with a cylindrical or short conical structure and is connected with the end part of a main shaft of the machine tool directly or through a flange plate. Chucks are commonly used in lathes, cylindrical grinders and internal grinders, and may also be used in conjunction with various indexing devices for milling and drilling machines.

The three-jaw automatic centering chuck in the market does not solve the problems that the tip of a material to be clamped is circular, the circle center of the material is on the circle center, and direct centering can be realized, and meanwhile, the force for clamping the material in a centering way is buffered to avoid damaging the material.

Disclosure of Invention

An object of the utility model is to provide a fixed jack catch three-jaw self centering chuck to solve the material pointed end that the solution that provides does not need to press from both sides to get in the above-mentioned background art and just can realize directly centering for circular and centre of a circle on the centre of a circle, the power of pressing from both sides is got to the centering simultaneously cushions the problem in order to avoid injury material to some extent.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a fixed jack catch three-jaw self-centering chuck, includes dish shell and driven gear, the inboard upper end of dish shell is provided with the motor, and one side of motor is connected with the driving gear, driven gear sets up in one side of bevel pinion, and bevel pinion's middle part lower extreme is connected with bevel pinion greatly, bevel pinion's the outside is provided with the gear screw thread, and the outside of gear screw thread is hugged closely there is the clamping screw thread, the outside of clamping screw thread is connected with the jack catch, and the outside middle part of jack catch is provided with the clamping cunning, the outside of jack catch is connected with telescopic frame, and telescopic frame's inboard is provided with the hydraulic pressure pipe, the one end of hydraulic pressure pipe is connected with the spring, and the inboard middle part of spring is provided with the hydraulic stem the tensile clamp, and the inboard middle part of dish shell is provided with the position circle.

Preferably, the motor forms a meshing transmission structure through a driving gear and a driven gear, and the driven gear and the bevel pinion form a coaxial structure.

Preferably, the small bevel gear and the large bevel gear form a meshing transmission structure, and the small bevel gear and the large bevel gear are vertically distributed.

Preferably, the large bevel gear is movably connected with the clamping jaw through gear threads and clamping threads, and the gear threads and the clamping threads form threaded connection.

Preferably, the outer dimension of the stretching clamp is matched with the inner dimension of the telescopic frame, and the hydraulic pipe and the hydraulic rod form a stretching structure.

Preferably, the locating ring and the clamping jaw are vertically distributed, and the locating ring and the disc shell are circularly distributed.

Compared with the prior art, the beneficial effects of the utility model are that: this fixed jack catch three-jaw automatic centering chuck is provided with the motor, and the motor passes through the driving gear and constitutes meshing transmission structure with driven gear, and meshing transmission structure makes bevel pinion's motion no longer lean on to use manual, has reduced the whole injury to the people of chuck at the function in-process of lathe, also provides controllable power for tightening up of jack catch, and the whole use of chuck becomes simple convenient.

The small bevel gear and the large bevel gear form a meshing transmission structure, the meshing transmission structure realizes control over speed change of different gears through different gear ratios, transmission of power is facilitated, friction force is reduced, energy consumption is reduced, and meanwhile the small bevel gear and the large bevel gear which are arranged in the mode provide power for automatic centering of the clamping jaws.

Big bevel gear passes through gear screw thread and clamping screw thread and jack catch constitution swing joint, so sets up and makes the rotation through big bevel gear can make the clamping screw thread on the screw thread remove along with the orbit of screw thread, owing to be that big bevel gear's whole is rotatory, so the jack catch can be synchronous to this accomplishes the purpose of automatic centering, provides structural condition for the lathe can process better.

Drawings

Fig. 1 is a schematic view of the top-view detailed structure of the present invention;

FIG. 2 is a schematic front view of the present invention;

fig. 3 is a schematic side view of the present invention.

In the figure: 1. a disc housing; 2. a motor; 3. a driving gear; 4. a driven gear; 5. a bevel pinion gear; 6. a large bevel gear; 7. gear threads; 8. clamping threads; 9. clamping slip concave; 10. a claw; 11. a telescoping frame; 12. a hydraulic tube; 13. a spring; 14. a hydraulic lever; 15. stretching the clamp; 16. and (6) positioning rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a fixed jaw three-jaw automatic centering chuck comprises a disc shell 1, a motor 2, a driving gear 3, a driven gear 4, a small bevel gear 5, a large bevel gear 6, gear threads 7, clamping threads 8, clamping sliding recesses 9, jaws 10, a telescopic frame 11, a hydraulic pipe 12, a spring 13, a hydraulic rod 14, a stretching clamp 15 and a positioning ring 16, wherein the motor 2 is arranged at the upper end of the inner side of the disc shell 1, the driving gear 3 is connected to one side of the motor 2, the driven gear 4 is arranged at one side of the small bevel gear 5, the lower end of the middle part of the small bevel gear 5 is connected with the large bevel gear 6, the gear threads 7 are arranged on the outer side of the large bevel gear 6, the clamping threads 8 are tightly attached to the outer side of the gear threads 7, the jaws 10 are connected to the outer side of the clamping threads 8, the clamping sliding recesses 9 are arranged at the middle part of the outer side of the jaws 10, the telescopic frame 11 is connected to the outer side of the jaws 10, and the hydraulic pipe 12 is arranged on the inner side of the telescopic frame 11, one end of the hydraulic pipe 12 is connected with a spring 13, the middle part of the inner side of the spring 13 is provided with a hydraulic rod 14, one end of the hydraulic rod 14 is connected with a stretching clamp 15, and the middle part of the inner side of the disc shell 1 is provided with a positioning ring 16;

the motor 2 and the driven gear 4 form a meshing transmission structure through the driving gear 3, the driven gear 4 and the small bevel gear 5 form a coaxial structure, the meshing transmission structure enables the small bevel gear 5 to move without depending on manual operation, the damage of the whole chuck to people is reduced in the operation process of the machine tool, controllable power is provided for tightening the clamping jaws 10, and the whole use process of the chuck is simple and convenient;

the small bevel gear 5 and the large bevel gear 6 form a meshing transmission structure, the small bevel gear 5 and the large bevel gear 6 are vertically distributed, and the meshing transmission structure realizes control over speed change of different gears through different gear ratios, so that transmission of power is facilitated, friction force is reduced, energy consumption is reduced, and meanwhile the small bevel gear 5 and the large bevel gear 6 which are arranged in the way provide power for automatic centering of the clamping jaw 10;

the large bevel gear 6 is movably connected with the jaw 10 through the gear thread 7 and the clamping thread 8, the gear thread 7 and the clamping thread 8 form threaded connection, the arrangement enables the clamping thread 8 on the thread to move along with the track of the thread through the autorotation of the large bevel gear 6, and the jaw 10 can be synchronous due to the fact that the whole large bevel gear 6 rotates, so that the purpose of automatic centering is achieved, and structural conditions are provided for better processing of a machine tool;

the outer side size of the stretching clamp 15 is matched with the inner side size of the telescopic frame 11, the hydraulic pipe 12 and the hydraulic rod 14 form a stretching structure, the stretching structure ensures that processed articles can be better clamped after centering, and the edge of the stretching clamp 15 performs certain buffering on force in the clamping process, so that the clamping jaw 10 cannot easily damage excessive materials, and meanwhile, the arrangement also fully utilizes the space on the clamping jaw 10, so that the whole work is more stable;

the position circle 16 is perpendicular form with the jack catch 10 and distributes, and position circle 16 is circular distribution with set shell 1, sets up the centre of a circle position at set shell 1, does not have too much influence to irregular material to when the inner wall of circular material pointed end and position circle 16 matches each other, then directly realized the centering to the material, thereby let the work of jack catch 10 centre gripping material more smoothly.

The working principle is as follows: for the three-jaw self-centering chuck with fixed jaws, firstly, a motor 2 provides power to enable a driving gear 3 and a driven gear 4 to be meshed with each other to transmit the power, the power is brought to a small bevel gear 5 by the driven gear 4, the small bevel gear 5 transmits the power to a large bevel gear 6 which forms a meshed transmission structure with the small bevel gear 5, at the moment, the large bevel gear 6 rotates to enable a gear thread 7 to rotate simultaneously, the rotation of the gear thread 7 enables a clamping thread 8 to move passively along the direction matched with the gear thread 7, at the moment, the front end of a chuck shell 1 controls to enable the jaws 10 to move inwards or outwards, the front end of the chuck shell 1 and a sliding structure formed by a clamping sliding concave 9 limit the jaws 10 to only move in the direction of a gap of the chuck shell 1, the jaws 10 in three directions move simultaneously to clamp an object, and thus the purpose of self-centering is achieved, simultaneously the tensile structure that hydraulic pressure pipe 12 and hydraulic stem 14 constitute makes tensile clamp 15 can be controlled by the tensile of hydraulic stem 14, also can assist when pressing from both sides the material and press from both sides and get the material like this, withdraw action speed at tensile clamp 15 because the reason of the elasticity of spring 13 can descend and have some restrictions, the material of pressing from both sides when getting is circular at last, can carry out the material earlier and the matching of position circle 16, realize that the matching can directly accomplish the centering, the jack catch 10 is got again and will be more smooth like this.

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

Claims (6)

1. The utility model provides a fixed jack catch three-jaw self-centering chuck, includes dish shell (1) and driven gear (4), its characterized in that: the disc shell is characterized in that a motor (2) is arranged at the upper end of the inner side of the disc shell (1), a driving gear (3) is connected to one side of the motor (2), a driven gear (4) is arranged on one side of a small bevel gear (5), the lower end of the middle of the small bevel gear (5) is connected with a large bevel gear (6), gear threads (7) are arranged on the outer side of the large bevel gear (6), clamping threads (8) are tightly attached to the outer side of the gear threads (7), clamping jaws (10) are connected to the outer side of the clamping threads (8), clamping sliding recesses (9) are arranged in the middle of the outer side of the clamping jaws (10), a telescopic frame (11) is connected to the outer side of the clamping jaws (10), a hydraulic pipe (12) is arranged on the inner side of the telescopic frame (11), a spring (13) is connected to one end of the hydraulic pipe (12), a hydraulic rod (14) is arranged in the middle of the inner side of the spring (13), a stretching clamp (15) is connected to one end of the hydraulic rod (14), and a positioning ring (16) is arranged in the middle of the inner side of the disc shell (1).

2. A fixed jaw three jaw self-centering chuck according to claim 1, wherein: the motor (2) and the driven gear (4) form a meshing transmission structure through the driving gear (3), and the driven gear (4) and the small bevel gear (5) form a coaxial structure.

3. A fixed jaw three jaw self-centering chuck according to claim 1, wherein: the small bevel gear (5) and the large bevel gear (6) form a meshing transmission structure, and the small bevel gear (5) and the large bevel gear (6) are vertically distributed.

4. A fixed jaw three jaw self-centering chuck according to claim 1, wherein: the large bevel gear (6) is movably connected with the clamping jaw (10) through a gear thread (7) and a clamping thread (8), and the gear thread (7) and the clamping thread (8) form a threaded connection.

5. A fixed jaw three jaw self-centering chuck according to claim 1, wherein: the outer side size of the stretching clamp (15) is matched with the inner side size of the telescopic frame (11), and the hydraulic pipe (12) and the hydraulic rod (14) form a stretching structure.

6. A fixed jaw three jaw self-centering chuck according to claim 1, wherein: the positioning ring (16) and the clamping jaws (10) are vertically distributed, and the positioning ring (16) and the disc shell (1) are circularly distributed.

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