CN217966033U

CN217966033U - Clamp for large gear ring

Info

Publication number: CN217966033U
Application number: CN202222182935.9U
Authority: CN
Inventors: 李德森; 李丹丹
Original assignee: Xinmingyu Suzhou Intelligent Technology Co ltd
Current assignee: Xinmingyu Suzhou Intelligent Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-12-06
Anticipated expiration: 2032-08-18

Abstract

The utility model relates to an anchor clamps field, concretely relates to large-scale (holding) chuck for ring gear. The device comprises a base, wherein a magnetic seat for adsorbing an annular workpiece and a positioning assembly for centering the annular workpiece are arranged on the base; the magnetic base is only contacted with the lower end face of the annular workpiece, and the positioning assembly is separated from the annular workpiece after the magnetic base works. For the annular workpiece with a large diameter, other structures are not required to be adjusted, and clamping can be completed only by adjusting the position of the magnetic seat and adapting to the diameter of the annular workpiece.

Description

Clamp for large gear ring

Technical Field

The utility model relates to an anchor clamps field, concretely relates to (holding) chuck for large-scale ring gear.

Background

The traditional three-jaw chuck is a machine tool accessory which clamps and positions a workpiece by utilizing the radial movement of three movable jaws uniformly distributed on a pushing head. The common metric three-jaw self-centering chuck has the specifications of 200mm, 250mm, 320mm and 400mm. When used for clamping an annular workpiece with an excessively large diameter, such as a large slewing ring gear in a slewing mechanism of an excavator, there is a problem that the clamping range is insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the utility model provides a large-scale anchor clamps for ring gear to solve the problem that the three-jaw chuck specification that exists among the prior art is too little so that can't effectively centre gripping large-scale ring gear.

The technical scheme of the utility model is that: a clamp for a large gear ring comprises a base, wherein a magnetic seat for adsorbing an annular workpiece and a positioning assembly for centering the annular workpiece are arranged on the base;

the magnetic base is only contacted with the lower end face of the annular workpiece, and the positioning assembly is separated from the annular workpiece after the magnetic base works.

Preferably, the base is provided with a plurality of dovetail grooves distributed along the radial direction of the base, the magnetic force seats are arranged in the dovetail grooves and can be adjusted in position along the radial direction of the base according to the processing requirement, the number of the magnetic force seats is three or more, and the magnetic force seats are arranged on any radial different side of the base;

the positioning assembly comprises a chuck arranged in the center of the base, a clamping arm arranged on the chuck and a driver used for providing power.

Preferably, the chuck comprises a push head vertically arranged at the center of the base, a chuck body arranged around the push head, and a sliding block in sliding fit with the push head and the chuck body;

the push head is driven by a driver arranged in the base to move along the vertical direction, three T-shaped grooves are uniformly formed in the side wall of the push head, the whole T-shaped groove is of an inverted T-shaped structure, and the three T-shaped grooves are located in the same conical surface and used for connecting the sliding block and providing a guiding effect for the movement of the sliding block;

three guide grooves are uniformly and horizontally formed in the chuck body, and the guide grooves are arranged corresponding to the T-shaped grooves;

the three sliding blocks are arranged in the guide groove in a sliding mode and are in sliding fit with the T-shaped groove, and when the driver drives the push head to ascend or descend, the T-shaped groove drives the sliding blocks to move outwards or inwards at the same speed along the radial direction of the push head.

Preferably, the number of the clamping arms is three along the radial direction around the push head, one end of each clamping arm is fixed at the upper end of the sliding block, and the non-fixed end of each clamping arm is in sliding fit with the guide rail fixed on the base.

Preferably, the upper end of the clamping arm is fixed with a clamping jaw for clamping an annular workpiece; the clamping jaw is L-shaped and comprises a first part which is fixed with the clamping arm and is horizontally arranged and a second part which is vertically fixed at the upper end of the first part;

wherein the second part is used for clamping the annular workpiece; in order to ensure the clamping precision, the clamping parts of the second part are arc-shaped and attached to the annular workpiece, and the circle centers of circles where the clamping parts are located on the axis of the base.

Preferably, the magnetic base comprises a magnet and a control switch; the upper ends of the magnets are horizontal and higher than the upper ends of the first part and the second part, and meanwhile, the upper ends of all the magnets are required to be ensured to be positioned on the same horizontal plane and to be contacted with the annular workpiece.

Compared with the prior art, the utility model has the advantages that:

(1) For the annular workpiece with a large diameter, other structures are not required to be adjusted, and clamping can be completed only by adjusting the position of the magnetic seat and adapting to the diameter of the annular workpiece.

(2) The three sliding blocks are pushed by the driver to move at the same speed, so that the clamping jaws are driven to quickly finish centering of the annular workpiece.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a structural diagram of a fixture for a large-sized ring gear according to the present invention;

FIG. 2 is a view of the chuck structure of the present invention;

FIG. 3 is a structural diagram of the pushing head of the present invention;

FIG. 4 is a cross-sectional view of the pushing head of the present invention;

FIG. 5 is a view of the structure of the claw of the present invention;

FIG. 6 is a schematic diagram of the slider structure of the present invention;

FIG. 7 is a structural diagram of the magnetic base of the present invention;

wherein: 1. the device comprises a base 2, a guide rail 3, a chuck 31, a push head 311, a T-shaped groove 32, a chuck body 33, a sliding block 4, a clamping arm 5, a clamping jaw 51, a first part 52, a second part 6, a magnetic base 61, a magnet 7 and an annular workpiece.

Detailed Description

The following detailed description is made in conjunction with specific embodiments of the present invention:

as shown in fig. 1, the fixture for the large gear ring comprises a base 1, wherein a magnetic seat 6 for adsorbing an annular workpiece 7 and a positioning assembly for centering the annular workpiece 7 are arranged on the base 1. The base 1 is cylindrical, and the upper end of the base 1 is provided with a plurality of dovetail grooves distributed along the radial direction of the base 1 and used for installing the guide rail 2 and the magnetic base 6. The positioning assembly comprises a chuck 3 arranged at the center of the base 1, a chuck arm 4 arranged on the chuck 3 and a driver for providing power.

As shown in fig. 2, the chuck 3 includes a pushing head 31 vertically disposed at the center of the base 1, a chuck body 32 disposed around the pushing head 31, and a slider 33 slidably engaged with the pushing head 31.

As shown in fig. 3 and 4, three T-shaped slots 311 are uniformly formed on the side wall of the pushing head 31, the T-shaped slot 311 is integrally in an inverted T-shaped structure, the three T-shaped slots 311 are located in the same conical surface, and the T-shaped slot 311 is used for connecting the slider 33 and providing a guiding effect for the movement of the slider 33. Three guide grooves are uniformly and horizontally formed in the chuck body 32, and the guide grooves are arranged corresponding to the T-shaped grooves 311, as shown in fig. 6, three sliding blocks 33 are in sliding fit with the guide grooves, and one end of each sliding block 33 is provided with a structure matched with the T-shaped groove 311, so that the sliding blocks 33 can slide along the T-shaped grooves 311. When the driver drives the pushing head 31 to ascend or descend, the T-shaped slot 311 drives the sliding block 33 to move outwards or inwards along the radial direction of the pushing head 31 at the same speed.

As shown in fig. 1, three clamp arms 4 are uniformly arranged in the radial direction around the push head 31, one end of each clamp arm 4 is fixed at the upper end of the sliding block 33, and the non-fixed end is in sliding fit with the guide rail 2 fixed on the base 1.

The upper end of the clamping arm 4 is fixed with a clamping jaw 5 for clamping an annular workpiece 7. As shown in fig. 5, the jaw 5 has an L-shape and includes a horizontally disposed first portion 51 fixed to the chucking arm 4 and a second portion 52 vertically fixed to an upper end of the first portion 51. Wherein the second portion 52 is used for clamping the ring-shaped workpiece 7. To ensure the clamping accuracy, the clamping portions of the second portion 52 are arc-shaped and attached to the annular workpiece 7, and the centers of the circles of the three clamping portions are located on the axis of the base 1.

As shown in fig. 7, the magnetic base 6 is installed in a dovetail groove, and can be adjusted in position in the radial direction of the base 1 according to the machining requirements. In order to ensure that the annular workpiece 7 is effectively fixed, the magnetic force seat 6 needs to be set to be three or more than three, and the magnetic force seat 6 is set to be four in the embodiment, wherein the magnetic force seat is arranged on any radial opposite side of the base 1. Wherein, the magnetic base 6 comprises a magnet 61 and a control switch. The upper ends of the magnets 61 are horizontal and higher than the upper ends of the first and

second portions

51 and 52, while ensuring that the upper ends of all the magnets 61 are located at the same horizontal level and in contact with the annular workpiece 7.

When in work:

1. firstly, an annular workpiece 7 is placed on a magnetic seat 6, and the position of the annular workpiece 7 is adjusted to enable the three clamping jaws 5 to be positioned at the inner ring of the annular workpiece 7.

2. And starting the driver to enable the three clamping jaws 5 to abut against the inner wall of the annular workpiece 7.

3. The magnetic base 6 is activated to control the switch, so that the magnet 61 is attracted to the annular workpiece 7, and then the driver controls the jaws 5 to be out of contact with the annular workpiece 7.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. It is obvious to a person skilled in the art that the invention is not limited to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention, and that the embodiments are therefore to be considered in all respects as exemplary and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The clamp for the large gear ring is characterized by comprising a base, wherein a magnetic seat for adsorbing an annular workpiece and a positioning assembly for centering the annular workpiece are arranged on the base;

2. The jig for a large ring gear according to claim 1, characterized in that:

the magnetic base is provided with three or more magnetic bases, and any radial different side of the base is provided with the magnetic bases;

3. The fixture for the large-sized gear ring according to claim 2, wherein the chuck comprises a pushing head vertically arranged at the center of the base, a chuck body arranged around the pushing head, and a sliding block in sliding fit with the pushing head and the chuck body;

the push head is driven by a driver arranged in the base to move along the vertical direction, three T-shaped grooves are uniformly formed in the side wall of the push head, the whole T-shaped groove is of an inverted T-shaped structure, and the three T-shaped grooves are located in the same conical surface and are used for connecting the sliding block and providing a guiding effect for the movement of the sliding block;

4. The fixture for the large-scale gear ring according to claim 3, wherein the number of the clamp arms is three, the clamp arms are evenly arranged around the push head in the radial direction, one ends of the clamp arms are fixed at the upper ends of the sliding blocks, and the non-fixed ends of the clamp arms are in sliding fit with the guide rails fixed on the base.

5. The clamp for the large gear ring according to claim 4, wherein a clamping jaw is fixed at the upper end of the clamping arm and used for clamping an annular workpiece; the clamping jaw is L-shaped and comprises a first part which is fixed with the clamping arm and is horizontally arranged and a second part which is vertically fixed at the upper end of the first part;

wherein the second portion is used for clamping an annular workpiece; in order to guarantee clamping precision, the clamping parts of the second part are arc-shaped and attached to the annular workpiece, and the circle centers of circles where the clamping parts are located on the axis of the base.

6. The jig for the large-sized ring gear according to claim 5, wherein the magnetic base comprises a magnet and a control switch; the upper ends of the magnets are horizontal and higher than the upper ends of the first part and the second part, and meanwhile, the upper ends of all the magnets are required to be ensured to be positioned on the same horizontal plane and to be contacted with the annular workpiece.