Comb tooth type manual chuck

Abstract

The utility model relates to the technical field of machine tool clamps, in particular to a comb tooth type manual chuck which comprises a chuck body, a large bevel gear, a small bevel gear, a rear cover and a plurality of movable clamping jaws, the large bevel gear is movably arranged on the inner side of the chuck body through the rear cover, and the small bevel gear is arranged on the chuck body and meshed with the lower end of the large bevel gear. The movable clamping jaws are distributed around the axis of the chuck body and meshed with the upper end of the bevel gear wheel, each movable clamping jaw comprises an upper jaw, a lower jaw and a connecting block, the upper jaws are arranged on the lower jaws through the connecting blocks, and the connecting blocks are connected with the lower jaws in a sliding mode; comb teeth meshed with each other are arranged on the contact surfaces of the upper claw and the lower claw; by means of the manual chuck, the clamping range of the manual chuck can be enlarged, and the manual chuck is more flexible to use.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool fixtures, and specifically relates to a comb-tooth type manual chuck. Background Art

[0002] The three-jaw chuck is composed of a chuck body, movable jaws and a jaw drive mechanism. Its principle is to use the jaw drive mechanism to make the three movable jaws evenly distributed on the chuck body move radially to clamp and position the workpiece. The movable jaw of a conventional manual chuck is a cross-key connection mechanism consisting of an upper jaw and a lower jaw. The upper jaw is installed on the lower jaw, and the upper jaw itself cannot be adjusted radially, which means that the clamping range of the chuck cannot be adjusted randomly, and it is not flexible enough to use. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a comb-tooth type manual chuck, which can increase the clamping range of the manual chuck and is more flexible in use.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a comb-tooth type manual chuck, comprising a chuck body, a large bevel gear, a small bevel gear, a back cover and a plurality of movable claws, wherein the large bevel gear is movably arranged on the inner side of the chuck body through the back cover, the small bevel gear is arranged on the chuck body and the small bevel gear is meshed with the lower end of the large bevel gear, a plurality of movable claws are distributed around the axis of the chuck body and are all meshed with the upper end of the large bevel gear, the movable claws include an upper claw, a lower claw and a connecting block, the upper claw is arranged on the lower claw through the connecting block, wherein the connecting block is slidably connected with the lower claw; the contact surfaces of the upper claw and the lower claw are both provided with meshing comb teeth; the lower claw is arranged on the chuck body and the lower end of the lower claw is meshed with the upper end of the large bevel gear.

[0005] Preferably, a T-shaped slot is provided on the lower claw; the lower portion of the connecting block is at least partially slidably disposed in the T-shaped slot, and the upper portion of the connecting block is fixedly connected to the upper claw.

[0006] Preferably, the movable claw further includes a fastening screw; and the connecting block and the upper claw are fixedly connected via the fastening screw.

[0007] Preferably, the T-slot is opened in the same direction as the radial direction of the chuck body.

[0008] Preferably, the movable jaws are provided with three groups, and the three groups of movable jaws are evenly distributed around the axis of the chuck body.

[0009] Preferably, a plurality of connection holes are provided on the upper claw, and the plurality of connection holes are arranged along the length direction of the upper claw; and the fastening screws are selectively arranged to pass through the connection holes.

[0010] Preferably, the chuck body, the large bevel gear and the rear cover are coaxial.

[0011] Preferably, there are three small bevel gears, and the three small bevel gears are all arranged along the radial direction of the large bevel gear.

[0012] Preferably, the three small bevel gears are evenly distributed around the axis of the large bevel gear.

[0013] Preferably, the chuck further comprises an oil nozzle; the oil nozzle is arranged on the chuck body.

[0014] Compared with the prior art, the beneficial effect of the utility model is: by designing the movable jaw into an upper jaw, a lower jaw, a connecting block and a fastening screw, the upper jaw and the lower jaw are connected by the connecting block and the fastening screw. When the clamping range of the chuck needs to be adjusted, only the fastening screw needs to be unscrewed to adjust the relative position of the upper jaw and the lower jaw. After adjustment, the fastening screw needs to be tightened to continue clamping. In this way, the clamping range of the manual chuck can be increased and the use is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the explosion of the manual chuck of the utility model;

[0016] Figure 2 It is a schematic diagram of the longitudinal section of the chuck of the utility model;

[0017] Figure 3 This is a schematic diagram of the upper structure of the chuck of the utility model;

[0018] Figure 4 This is a schematic diagram of the lower side structure of the chuck of the utility model;

[0019] Figure 5 This is a schematic diagram of the installation of the clamping claw of the utility model;

[0020] Figure 6 It is a schematic diagram of the back cover of the utility model.

[0021] In the figure: 1 chuck body, 2 large bevel gear, 3 upper jaw, 4 lower jaw, 5 small bevel gear, 6 rear cover, 7 T-type wrench, 8 latch, 9 rear cover screw, 10 oil nozzle, 11 positioning screw, 12 connecting screw, 13 connecting block, 14 internal angle screwdriver, 15 fastening screw, 101 through hole, 102 cross slot, 401 T-type slot, 601 rear cover body, 602 support ring. DETAILED DESCRIPTION

[0022] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0023] Specific embodiment 1: Please refer to Figure 1-6A comb-tooth type manual chuck comprises: a chuck body 1, movable jaws, a T-type wrench 7, an internal angle screwdriver 14 and a jaw driving mechanism, wherein the movable jaws are provided with three groups, and the three groups of movable jaws and the jaw driving mechanism are all arranged on the chuck body 1. Under the action of the jaw driving mechanism, the three groups of movable jaws can move radially at the same time to achieve automatic centering and clamping. The comb-tooth type manual chuck is suitable for clamping workpieces of round, regular triangle or regular hexagon shape.

[0024] The claw driving mechanism includes a large bevel gear 2, a small bevel gear 5, a rear cover 6, a latch 8 and a rear cover screw 9. The chuck body 1 is a cover-shaped structure with a through hole 101 at the axis; the rear cover 6 is composed of a rear cover body 601 and a support ring 602 fixed to the upper end of the rear cover body 601. The rear cover body 601 is an annular structure, and the rear cover body 601 is fixed to the inner side of the lower end of the chuck body 1 by the rear cover screw 9;

[0025] The large bevel gear 2 is arranged in the cavity on the inner side of the chuck body 1 through the back cover 6, wherein the upper end of the support ring 602 is slidably connected with the lower end of the large bevel gear 2 and can hold up the large bevel gear 2 to provide stable support for the large bevel gear 2 when it rotates circumferentially; in addition, the large bevel gear 2 is coaxially arranged with the chuck body 1; the large bevel gear 2 is an annular structure, and its upper end face is provided with an Archimedean spiral groove, and the lower end face is provided with bevel teeth; the small bevel gear 5 is arranged on the chuck body 1 through the pin 8, and the small bevel gear 5 is meshed with the bevel teeth of the large bevel gear 2; a square hole is provided on the small bevel gear 5; further, three small bevel gears 5 are provided, and the three small bevel gears 5 are evenly distributed around the axis of the large bevel gear 2; when any small bevel gear 5 is rotated, the large bevel gear 2 rotates.

[0026] The three groups of movable jaws are evenly distributed around the axis of the through hole 101. Specifically, three cross grooves 102 for installing the three groups of movable jaws are radially opened on the upper end of the chuck body 1, and the movable jaws are slidably connected to the chuck body 1; taking a group of movable jaws as an example, the movable jaws include an upper jaw 3, a lower jaw 4, a connecting block 13 and a fastening screw 15, the lower end of the lower jaw 4 is engaged with the Archimedean spiral groove of the large bevel gear 2, a T-slot 401 is opened on the lower jaw 4, and the connecting block 13 is at least partially slidably arranged in the T-slot 401, and the upper jaw 3 is arranged on the upper side of the lower jaw 4, and the upper jaw 3 is fixedly connected to the connecting block 13 by a fastening screw 15. At this time, the connecting block 13 is crimped with the lower jaw 4, so that the upper jaw 3 and the lower jaw 4 remain fixed; it should be noted that the opening direction of the T-slot 401 is the same as the opening direction of the cross slot 102; further, in order to ensure the stability of the clamping of the movable jaws, the contact surfaces of the upper jaw 3 and the lower jaw 4 are both provided with comb teeth, and the comb teeth can increase the friction between the upper jaw 3 and the lower jaw 4, so that the upper jaw 3 and the lower jaw 4 will not slide after being relatively fixed, thereby ensuring the stability of the clamping force.

[0027] Furthermore, in order to further increase the clamping range of the chuck, a plurality of connection holes are provided on the upper jaw 3, and the plurality of connection holes are arranged along the length direction of the upper jaw 3; the fastening screws 15 are selectively arranged to pass through the connection holes.

[0028] When the small bevel gear 5 is rotated through the square hole with a T-type wrench 7, the large bevel gear 2 rotates, and the large bevel gear 2 drives the three sets of movable jaws to move radially at the same time, thereby realizing automatic centering and clamping. When the clamping range of the chuck needs to be adjusted, it is only necessary to unscrew the fastening screw 15 to adjust the relative position of the upper jaw and the lower jaw. After adjustment, tighten the fastening screw 15 and the chuck can be used. In this way, the clamping range of the manual chuck can be increased, and the use is more flexible.

[0029] In this embodiment, the chuck also includes an oil nozzle 10, a positioning screw 11 and a connecting screw 12, and the oil nozzle 10, the positioning screw 11 and the connecting screw 12 are all arranged on the chuck body 1, the oil nozzle 10 is used to deliver lubricating oil to the jaw driving mechanism, and the positioning screw 11 and the connecting screw 12 are installed by an internal angle screwdriver 14 for fixing or positioning the chuck body 1 and the machine tool.

[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. A comb-tooth type manual chuck, comprising a chuck body (1), a large bevel gear (2), a small bevel gear (5), a rear cover (6) and a plurality of movable claws, wherein the large bevel gear (2) is movably arranged on the inner side of the chuck body (1) through the rear cover (6), the small bevel gear (5) is arranged on the chuck body (1) and the small bevel gear (5) is meshed with the lower end of the large bevel gear (2), and a plurality of movable claws are distributed around the axis of the chuck body (1) and are all meshed with the upper end of the large bevel gear (2), characterized in that: The movable jaw comprises an upper jaw (3), a lower jaw (4) and a connecting block (13); the upper jaw (3) is arranged on the lower jaw (4) via the connecting block (13), wherein the connecting block (13) is slidably connected to the lower jaw (4); the contact surfaces of the upper jaw (3) and the lower jaw (4) are provided with meshing comb teeth; the lower jaw (4) is arranged on the chuck body (1) and the lower end of the lower jaw (4) is meshed with the upper end of the large bevel gear (2).

2. A comb-tooth type manual chuck according to claim 1, characterized in that: The lower claw (4) is provided with a T-shaped groove (401); the lower portion of the connecting block (13) is at least partially slidably disposed in the T-shaped groove (401), and the upper portion of the connecting block (13) is fixedly connected to the upper claw (3).

3. A comb-tooth type manual chuck according to claim 1 or 2, characterized in that: The movable clamping claw further comprises a fastening screw (15); the connecting block (13) and the upper claw (3) are fixedly connected via the fastening screw (15).

4. A comb-tooth type manual chuck according to claim 2, characterized in that: The opening direction of the T-shaped groove (401) is the same as the radial direction of the chuck body (1).

5. A comb-tooth type manual chuck according to claim 1, characterized in that: The movable clamping jaws are provided with three groups, and the three groups of movable clamping jaws are evenly distributed around the axis of the chuck body (1).

6. A comb-tooth type manual chuck according to claim 3, characterized in that: The upper claw (3) is provided with a plurality of connection holes, which are arranged along the length direction of the upper claw (3); and the fastening screws (15) are selectively arranged to penetrate the connection holes.

7. A comb-tooth type manual chuck according to claim 1, characterized in that: The chuck body (1), the large bevel gear (2) and the rear cover (6) are coaxial.

8. A comb-tooth type manual chuck according to claim 1, characterized in that: There are three small bevel gears (5), and the three small bevel gears (5) are all arranged along the radial direction of the large bevel gear (2).

9. A comb-tooth type manual chuck according to claim 8, characterized in that: The three small bevel gears (5) are evenly distributed around the axis of the large bevel gear (2).

10. A comb-tooth type manual chuck according to claim 1, characterized in that: The chuck further comprises an oil nozzle (10); the oil nozzle (10) is arranged on the chuck body (1).

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