Thin manual chuck

Abstract

The utility model relates to the technical field of machine tool clamps, in particular to a thin 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 movable clamping jaws are arranged at the upper end of the chuck body in a sliding mode and meshed with the large bevel gear. The small bevel gear is obliquely arranged in the chuck body and on the lower side of the large bevel gear from outside to inside, and the small bevel gear is meshed with the large bevel gear; the tail end part of the bevel pinion is in sliding connection with the upper end part of the rear cover; the small bevel gear is of a columnar structure, the horizontal height of the head end of the small bevel gear is larger than that of the tail end of the small bevel gear, when a wrench is used for operating the chuck, the wrench can obtain more operation space, rotation of the wrench cannot be affected due to the fact that the thickness of the chuck is not enough, the thickness of the manual chuck can be reduced, and the labor intensity of workers is reduced. And the machining range of the chuck is enlarged.

Description

Technical Field

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

[0002] The three-jaw chuck is composed of a chuck body, movable jaws and a jaw driving mechanism. Its principle is to use the jaw driving mechanism to make the three movable jaws evenly distributed on the chuck body move radially to clamp and position the workpiece. Existing patents such as the patent applied by the applicant, a precision marking fixture, publication number: CN219542814U, achieve clamping by rotating the small bevel gear with a wrench to drive the large bevel gear, and the large bevel gear drives the movable jaws. In actual operation, since the axis of the small bevel gear is perpendicular to the axis of the chuck body and in order to ensure the flatness of the outer periphery of the chuck cylinder, the small bevel gear is immersed in the chuck cylinder, so that when the wrench rotates the small bevel gear, the chuck needs to reserve the rotation space of the wrench. Such a design makes the overall thickness of the chuck thicker, affecting the processing range. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a thin manual chuck, which can reduce the thickness of the manual chuck and increase the processing range of the chuck.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thin manual chuck, comprising a chuck body, a large bevel gear, a small bevel gear, a rear cover and a plurality of movable claws, the large bevel gear is movably arranged inside the chuck body through the rear cover, a plurality of movable claws are slidably arranged on the upper end of the chuck body and the movable claws are meshed with the large bevel gear, the small bevel gear is obliquely arranged inside the chuck body and on the lower side of the large bevel gear from the outside to the inside, and the small bevel gear is meshed with the large bevel gear; the rear end of the small bevel gear is slidably connected to the upper end of the rear cover; the small bevel gear is a columnar structure, and the horizontal height of the head end of the small bevel gear is higher than the horizontal height of the tail end of the small bevel gear.

[0005] Preferably, the angle between the axis of the small bevel gear and the disc surface of the chuck body is 30°.

[0006] Preferably, the chuck body includes a chuck cover and a connecting disk; the chuck cover is arranged at the upper end of the connecting disk; the small bevel gear is arranged through the outer wall of the chuck cover; the large bevel gear and the back cover are both arranged on the inner side of the chuck cover; the outer diameter of the connecting disk is smaller than the outer diameter of the chuck body.

[0007] Preferably, a U-shaped groove is provided on the outer edge of the connecting plate.

[0008] Preferably, a plurality of U-shaped grooves are provided, and the plurality of U-shaped grooves are evenly distributed around the axis of the connecting disk.

[0009] Preferably, the chuck body is an integrated structure.

[0010] Preferably, the movable jaw comprises an upper jaw, a lower jaw and a fastening screw, and the upper jaw is fixed on the lower jaw by the fastening screw; the lower jaw is meshed with the large bevel gear.

[0011] Preferably, three small bevel gears are provided, and the three small bevel gears are evenly distributed around the axis of the large bevel gear.

[0012] Preferably, the chuck further comprises a limit screw; the limit screw is arranged at the upper end of the chuck body and the lower end of the limit screw abuts against the head end of the small bevel gear.

[0013] Preferably, a blind hole is formed at the upper end of the rear cover; and the tail end of the small bevel gear is at least partially disposed in the blind hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by changing the meshing mode of the small bevel gear and the large bevel gear and making the axis of the small bevel gear form a 30° bevel angle with the disk surface of the chuck body, that is, the horizontal height of the head end of the small bevel gear is higher than the horizontal height of the tail end of the small bevel gear. Compared with the existing small bevel gear vertically arranged on the outer cylindrical surface of the chuck, when using a wrench to operate the ultra-thin chuck, the wrench can obtain more operating space, and the rotation of the wrench will not be affected by the insufficient thickness of the chuck. Through such a design, there is no need to reserve too much operating space for the wrench when designing the thickness of the chuck, so the thickness of the chuck can be greatly reduced, thereby increasing the processing range of the chuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a longitudinal cross section of the chuck of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the upper side of the chuck of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the back cover of the utility model.

[0018] In the figure: 1 chuck body, 2 large bevel gear, 3 upper claw, 4 lower claw, 5 small bevel gear, 6 rear cover, 7 fastening screw, 8 latch, 9 limit screw, 11 chuck cover, 12 connecting plate, 111 I-shaped slot, 121 U-shaped slot, 61 blind hole. DETAILED DESCRIPTION

[0019] 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.

[0020] Specific embodiment 1: Please refer to Figure 1-3 A thin manual chuck comprises: a chuck body 1, movable jaws 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, wherein the movable jaws are slidably connected with the chuck body 1, and the jaw driving mechanism is arranged on the lower side of the movable jaws. Under the action of the jaw driving mechanism, the three groups of movable jaws can move radially at the same time to realize automatic centering and clamping. The thin manual chuck is suitable for clamping workpieces of round, regular triangle or regular hexagon.

[0021] The chuck body 1 is composed of a chuck cover 11 and a connecting disk 12. Specifically, the chuck cover 11 is a cover-shaped structure with a through hole opened in the axis, and the connecting disk 12 is an annular structure. The connecting disk 12 is fixedly arranged at the lower end of the chuck cover 11, and the outer diameter of the connecting disk 12 is larger than the outer diameter of the chuck cover 11; the connecting disk 12 is the flange of the chuck and its main function is to provide an installation position for the chuck. Based on this, four U-shaped grooves 121 are opened on the connecting disk 12, and the U-shaped grooves 121 are used for connecting the chuck to the tooling table; in other embodiments, the U-shaped grooves 121 can be replaced by holes; in this embodiment, the chuck body 1 is an integrated structure;

[0022] The upper end of the chuck cover 11 is radially provided with an I-shaped groove 111 connected to the through hole, and the I-shaped groove 111 is used for installing the movable jaws; there are three I-shaped grooves 111, and the three I-shaped grooves 111 are evenly distributed around the axis of the chuck cover 11; the three I-shaped grooves 111 are correspondingly arranged with three groups of movable jaws.

[0023] Taking a group of movable claws as an example, the movable claws include an upper claw 3, a lower claw 4, and a plurality of fastening screws 7. The lower claw 4 is slidably arranged in the I-shaped groove 111, and the upper claw 3 is fixed to the upper end of the lower claw 4 by the fastening screws 7.

[0024] The claw driving mechanism includes a large bevel gear 2, a small bevel gear 5, a back cover 6, a latch 8 and a limit screw 9, wherein the back cover 6 is fixed to the inner side of the chuck cover 11 by the latch 8 and the back cover 6 is coaxial with the chuck cover 11; the back cover 6 is an annular structure, and three blind holes 61 are provided on its outer wall; the angle between the opening direction of the blind holes 61 and the axis of the back cover 6 is 60°; the large bevel gear 2 is provided on the inner side of the chuck cover 11 through the back cover 6, wherein the upper end of the back cover 6 is slidably connected to the lower end of the large bevel gear 2, and the back cover 6 can hold up the large bevel gear 2 to provide stable support for the large bevel gear 2 during circumferential rotation; in addition, the large bevel gear 2 is coaxially arranged with the chuck cover 11; the large bevel gear 2 is an annular structure, and the upper end face of the large bevel gear 2 is provided with an Archimedes spiral groove, and the lower end face is provided with bevel teeth; the lower end of the lower claw 4 is meshed with the Archimedes spiral groove of the large bevel gear 2;

[0025] The small bevel gear 5 is a columnar structure, and the small bevel gear 5 and the limit screw 9 are each provided with three and the two correspond one to one. The limit screw 9 is longitudinally arranged on the chuck cover 11 and is located on the upper side of the small bevel gear 5. The lower end of the limit screw 9 abuts against the head end of the small bevel gear 5, so that the small bevel gear 5 is clamped in the chuck body 1, which is used for the stability of the small bevel gear 5 after installation; the three small bevel gears 5 are evenly distributed around the axis of the large bevel gear 2 and correspond to the three blind holes 61. Specifically, the small bevel gear 5 is obliquely penetrated from the outside to the inside through the outer wall of the chuck cover 11, and the tail end of the small bevel gear 5 is slidably arranged in the blind hole 61; the small bevel gear 5 is meshed with the bevel teeth of the large bevel gear 2; a square hole is opened on the head end of the small bevel gear 5, and the square hole is used to provide a fulcrum for the wrench; when any small bevel gear 5 is rotated, the large bevel gear 2 rotates, and the large bevel gear 2 drives the three sets of movable claws to move radially at the same time, so as to realize automatic centering and clamping;

[0026] Furthermore, the angle between the axis of the small bevel gear 5 and the axis of the rear cover 6 is 60°, which can be understood as the axis of the small bevel gear 5 and the disk surface of the chuck body forming an oblique angle of 30°, which can also be understood as the horizontal height of the head end of the small bevel gear 5 is higher than the horizontal height of the tail end of the small bevel gear 5. By changing the meshing mode of the small bevel gear 5 and the large bevel gear 2, compared with the existing small bevel gear vertically arranged on the outer cylindrical surface of the chuck, when using a wrench to operate the ultra-thin chuck, the wrench can obtain more operating space, and the rotation of the wrench will not be affected by the insufficient thickness of the chuck. Through such a design, there is no need to reserve too much operating space for the wrench when designing the thickness of the chuck, so the thickness of the chuck can be greatly reduced, thereby increasing the processing range of the chuck.

[0027] 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 thin 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), and the plurality of movable claws are slidably arranged on the upper end of the chuck body (1) and the movable claws are meshed with the large bevel gear (2), characterized in that: The small bevel gear (5) is obliquely arranged inside the chuck body (1) and on the lower side of the large bevel gear (2) from the outside to the inside, and the small bevel gear (5) is meshed with the large bevel gear (2); the tail end of the small bevel gear (5) is slidably connected to the upper end of the rear cover (6); the small bevel gear (5) is a columnar structure, and the horizontal height of the head end of the small bevel gear (5) is higher than the horizontal height of the tail end of the small bevel gear (5).

2. A thin manual chuck according to claim 1, characterized in that: The included angle between the axis of the small bevel gear (5) and the disc surface of the chuck body (1) is 30°.

3. A thin manual chuck according to claim 1, characterized in that: The chuck body (1) comprises a chuck cover (11) and a connecting plate (12); the chuck cover (11) is arranged at the upper end of the connecting plate (12); the small bevel gear (5) is arranged to pass through the outer wall of the chuck cover (11); the large bevel gear (2) and the rear cover (6) are both arranged on the inner side of the chuck cover (11); and the outer diameter of the connecting plate (12) is smaller than the outer diameter of the chuck body (1).

4. A thin manual chuck according to claim 3, characterized in that: The outer edge of the connecting plate (12) is provided with a U-shaped groove.

5. A thin manual chuck according to claim 4, characterized in that: A plurality of U-shaped grooves are provided, and the plurality of U-shaped grooves are evenly distributed around the axis of the connecting disk (12).

6. A thin manual chuck according to claim 1 or 3, characterized in that: The chuck body (1) is an integrated structure.

7. A thin manual chuck according to claim 1, characterized in that: The movable claw comprises an upper claw (3), a lower claw (4) and a fastening screw (7); the upper claw (3) is fixed to the lower claw (4) by the fastening screw (7); and the lower claw (4) is meshed with the large bevel gear (2).

8. A thin manual chuck according to claim 1, characterized in that: There are three small bevel gears (5), and the three small bevel gears (5) are evenly distributed around the axis of the large bevel gear (2).

9. A thin manual chuck according to claim 1, characterized in that: The chuck further comprises a limit screw (9); the limit screw (9) is arranged at the upper end of the chuck body (1) and the lower end of the limit screw (9) abuts against the head end of the small bevel gear (5).

10. A thin manual chuck according to claim 1, characterized in that: A blind hole (61) is formed at the upper end of the rear cover (6); and the rear end of the small bevel gear (5) is at least partially disposed in the blind hole (61).

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