Electric three-jaw chuck

Abstract

The utility model relates to an electric three-jaw chuck, which belongs to the technical field of machine tool processing equipment and comprises a chuck body, jaws and a jaw adjusting component. The multiple clamping jaws are distributed on the surface of the chuck body in an array mode in the circumferential direction, the clamping jaw adjusting assembly is connected to the interior of the chuck body and comprises an electric cylinder, a transmission assembly, a rack, sliding blocks and a sliding rail, the clamping jaws are connected with the sliding blocks in a one-to-one correspondence mode, the output end of the electric cylinder is connected with the transmission assembly, and the transmission assembly is connected with the rack in a meshed mode. The sliding block is connected with the rack and can move in a reciprocating mode along the sliding rail. According to the utility model, the clamping jaw adjusting assemblies are intensively arranged in the chuck body, and no exposed transmission part is arranged, so that the appearance of the chuck is neater, the overall structure is more compact, the occupied area is small, the chuck is more suitable for being used in an environment with a limited space, and the adaptability is stronger.

Description

Technical Field

[0001] The utility model relates to an electric three-jaw chuck, in particular to an electric three-jaw chuck with high positioning accuracy, and belongs to the technical field of machine tool processing equipment. Background Art

[0002] During machine tool processing, a three-jaw chuck is generally used to fix the drill bit. The drill bit is clamped and loosened for replacement by radial movement of three movable jaws evenly distributed on the chuck body. Chinese utility model patent CN211939101U discloses a high-precision three-jaw chuck structure for clamping machine tool drill bits, including a chuck body structure, a first jaw structure, a second jaw structure, a third jaw structure and a jaw automatic adjustment structure. The jaw automatic adjustment structure includes a motor fixing frame, a motor, a belt transmission structure, a small bevel gear and a large bevel gear. The motor is arranged on the motor fixing frame, and the end of the small bevel gear is connected to the motor through a belt transmission structure, and the large bevel gear and the small bevel gear are meshed through bevel teeth. The motor of the three-jaw chuck structure is independently arranged from the chuck body structure, and the belt transmission structure is exposed to the outside, which may pose a safety hazard. In addition, the entire structure is complex and not simple enough to meet the use requirements. Utility Model Content

[0003] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides an electric three-jaw chuck with a simple overall structure, convenient operation and high positioning accuracy, thereby improving work efficiency and meeting usage requirements.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model discloses an electric three-jaw chuck, comprising a chuck body, jaws and a jaw adjustment assembly; a plurality of the jaws are distributed on the surface of the chuck body along a circumferential array, and the jaw adjustment assembly is connected to the inside of the chuck body, which includes an electric cylinder, a transmission assembly, a rack, a slider and a slide rail, the jaws are connected to the slider in a one-to-one correspondence, the output end of the electric cylinder is connected to the transmission assembly, the transmission assembly is meshed with the rack, the slider is connected to the rack, and the slider can move back and forth along the slide rail.

[0005] Furthermore, the transmission assembly includes a main gear, a slave gear, a worm, a worm wheel and a central gear that are meshed and connected in sequence; the main gear is connected to the output end of the electric cylinder, and the rack is meshed and connected to the surface of the central gear.

[0006] Furthermore, the slave gear and the worm are an integrated structure, the slave gear is connected to the end of the worm, the worm wheel and the central gear are an integrated structure, and the worm wheel is connected to the end of the central gear.

[0007] Furthermore, a claw seat is connected to the slider, and the claw is connected to the slider via the claw seat.

[0008] Furthermore, the chuck body includes a shell and a bottom cover, the rack, the slider and the slide rail are connected in the shell, and the shell is provided with a slide rail limiting groove, a slider limiting groove and a rack limiting groove.

[0009] Furthermore, it also includes a sealing belt and a sealing cover; the sealing belt is connected to the surface of the shell and covers the slider limit groove, and the sealing cover is connected to the side wall of the shell and connected to the end of the slider limit groove.

[0010] The utility model centrally arranges the claw adjustment components inside the chuck body without exposed transmission parts, so that the chuck looks neater and the overall structure is more compact, with a smaller footprint, which is more suitable for use in environments with limited space and has stronger adaptability. At the same time, it can also enhance safety protection, prevent operators from accidentally contacting moving parts, reduce the risk of safety accidents, and the internal closed environment also helps to protect the interior from pollutants such as dust, thereby optimizing maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model (I);

[0012] Figure 2 This is a schematic diagram of the overall structure of the utility model (II);

[0013] Figure 3 It is a cross-sectional view of the utility model;

[0014] Figure 4 It is a partial schematic diagram of the utility model;

[0015] Figure 5 It is a structural schematic diagram of the shell described in the utility model.

[0016] In the figure, 1, chuck body; 101, shell; 102, bottom cover; 2, claw adjustment assembly; 3, electric cylinder; 401, main gear; 402, slave gear; 403, worm; 404, worm wheel; 405, center gear; 5, rack; 6, slider; 7, slide rail; 8, claw seat; 9, slide rail limiting groove; 10, slider limiting groove; 11, rack limiting groove; 12, sealing belt; 13, sealing cover. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1 To Attachment Figure 5 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0018] An electric three-jaw chuck comprises a chuck body 1, a clamping jaw and a clamping jaw adjustment assembly 2; a plurality of the clamping jaws are distributed on the surface of the chuck body 1 in a circumferential array, the clamping jaw adjustment assembly 2 is connected to the inside of the chuck body 1, and comprises an electric cylinder 3, a transmission assembly, a rack 5, a slider 6 and a slide rail 7, the clamping jaws are connected to the slider 6 in a one-to-one correspondence, the output end of the electric cylinder 3 is connected to the transmission assembly, the transmission assembly is meshed and connected to the rack 5, the slider 6 is connected to the rack 5, and the slider 6 can reciprocate along the slide rail 7. By centrally arranging the clamping jaw adjustment assembly 2 inside the chuck body 1, there is no exposed transmission component, so that the appearance of the chuck is neater.

[0019] The transmission assembly includes a main gear 401, a slave gear 402, a worm 403, a worm wheel 404 and a central gear 405 which are meshed in sequence; the main gear 401 is connected to the output end of the electric cylinder 3, and the rack 5 is meshed with the surface of the central gear 405.

[0020] The slave gear 402 and the worm 403 are an integrated structure, the slave gear 402 is connected to the end of the worm 403 , the worm wheel 404 and the central gear 405 are an integrated structure, and the worm wheel 404 is connected to the end of the central gear 405 .

[0021] The slider 6 is connected with a claw seat 8 , and the claw is connected to the slider 6 via the claw seat 8 .

[0022] The chuck body 1 includes a shell 101 and a bottom cover 102. The rack 5, slider 6 and slide rail 7 are connected to the shell 101. The shell 101 is provided with a slide rail limiting groove 9, a slider limiting groove 10 and a rack limiting groove 11. The slider limiting groove 10 and the rack limiting groove 11 can limit the moving paths of the slider 6 and the rack 5 to improve the clamping stability.

[0023] It also includes a sealing belt 12 and a sealing cover 13; the sealing belt 12 is connected to the surface of the housing 101 and covers the slider limit groove 10, and the sealing cover 13 is connected to the side wall of the housing 101 and connected to the end of the slider limit groove 10. The sealing belt 12 can help protect the internal slide rail 7 and the slider 6 from dust and other pollutants, thereby reducing the failure rate.

[0024] Working principle:

[0025] When in use, the claw is installed on the claw seat 8, the electric cylinder 3 is started, the main gear 401 rotates, the main gear 401 drives the slave gear 402 to rotate, the slave gear 402 rotates with the worm 403, the worm 403 drives the worm wheel 404 to rotate, the worm wheel 404 rotates with the center gear 405, the surface of the center gear 405 meshes with the rack 5, and drives the three racks 5 to move simultaneously, the three racks 5 drive the three slide blocks 6 to move synchronously along the slide rail 7, and the claw seat 8 is installed on the slide block 6 and moves with the slide block 6. In this way, the clamping and opening of the claw can be realized by the forward and reverse rotation of the electric cylinder 3.

[0026] The overall structure of this application is more compact, occupies less space, is more suitable for use in environments with limited space, and has stronger adaptability.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric three-jaw chuck, characterized in that: The invention comprises a chuck body (1), a clamping jaw and a clamping jaw adjusting assembly (2); a plurality of the clamping jaws are distributed in a circumferential array on the surface of the chuck body (1); the clamping jaw adjusting assembly (2) is connected to the inside of the chuck body (1); the clamping jaws and the sliding block (6) are connected in a one-to-one correspondence; the output end of the electric cylinder (3) is connected to the transmission assembly; the transmission assembly is meshedly connected to the rack (5); the sliding block (6) is connected to the rack (5); and the sliding block (6) can move back and forth along the sliding block (7).

2. The electric three-jaw chuck according to claim 1, characterized in that: The transmission assembly comprises a main gear (401), a slave gear (402), a worm (403), a worm wheel (404) and a central gear (405) which are meshed and connected in sequence; the main gear (401) is connected to the output end of the electric cylinder (3), and the rack (5) is meshed and connected to the surface of the central gear (405).

3. The electric three-jaw chuck according to claim 2, characterized in that: The slave gear (402) and the worm (403) are an integrated structure, the slave gear (402) is connected to the end of the worm (403), the worm wheel (404) and the central gear (405) are an integrated structure, and the worm wheel (404) is connected to the end of the central gear (405).

4. The electric three-jaw chuck according to claim 1, characterized in that: The slider (6) is connected to a claw seat (8), and the claw is connected to the slider (6) via the claw seat (8).

5. The electric three-jaw chuck according to claim 1, characterized in that: The chuck body (1) comprises a shell (101) and a bottom cover (102); the rack (5), the slider (6) and the slide rail (7) are connected inside the shell (101); and the shell (101) is provided with a slide rail limiting groove (9), a slider limiting groove (10) and a rack limiting groove (11).

6. The electric three-jaw chuck according to claim 5, characterized in that: It also comprises a sealing belt (12) and a sealing cover (13); the sealing belt (12) is connected to the surface of the housing (101) and covers the slider limit groove (10); the sealing cover (13) is connected to the side wall of the housing (101) and is connected to the end of the slider limit groove (10).

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