An adjustable self-centering manual chuck

Abstract

The utility model relates to the technical field of chucks, in particular to an adjustable self-centering manual chuck, comprising a chuck body, a large bevel gear, a small bevel gear, a rear cover and three groups of claws, wherein the large bevel gear is movably embedded in the inner side of the chuck body through the rear cover, the small bevel gear is arranged on the chuck body and meshes with the lower end of the large bevel gear, the three groups of claws are distributed around the axis of the chuck body and mesh with the upper end of the large bevel gear, the chuck also comprises a plurality of groups of adjustable components movably arranged on the side wall of the chuck body, the plurality of groups of adjustable components are distributed around the axis of the chuck body and at least partially extend to the inner side of the chuck body; the plurality of groups of adjustable components are all located on the lower side of the rear cover, and the utility model can exert the most ideal clamping accuracy of the chuck.

Description

Technical Field

[0001] The utility model relates to the technical field of chucks, and specifically relates to an adjustable self-centering manual chuck. Background Art

[0002] The three-jaw chuck is composed of a chuck body, a jaw and a jaw drive mechanism. The principle is to use the jaw drive mechanism to make the three jaws evenly distributed on the chuck body move radially to clamp and position the workpiece. Figure 5 As shown, in the existing three-jaw self-centering manual chuck, the connection end of the chuck is connected to the lathe spindle through a jig plate. In order to achieve better coaxiality, the size of the joint end A of the jig plate should be formulated according to the size of the chuck connection end, and the joint size of the jig plate needs to reserve a little gap for chuck fine-tuning. Based on this, after the connection, the ideal coaxiality of the rotation center of the lathe spindle and the clamping center of the chuck cannot be accurately adjusted, which ultimately makes it difficult to achieve the most ideal clamping accuracy of the chuck. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model aims to provide an adjustable self-centering manual chuck, which can exert the most ideal clamping accuracy of the chuck.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable self-centering manual chuck, comprising a chuck body, a large bevel gear, a small bevel gear, a rear cover and three groups of claws, the large bevel gear is movably embedded in the inner side of the chuck body through the rear 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, the three groups of claws are distributed around the axis of the chuck body and are all meshed with the upper end of the large bevel gear, the chuck also includes several groups of adjustable components movably arranged on the side wall of the chuck body, several groups of adjustable components are distributed around the axis of the chuck body and the adjustable components at least partially extend to the inner side of the chuck body; several groups of adjustable components are all located on the lower side of the rear cover.

[0005] Preferably, a plurality of T-shaped holes are provided on the outer side of the lower end portion of the chuck body; the adjustable component is correspondingly installed on the inner side of the T-shaped hole; the adjustable component includes a positioning pin and a locking screw; the positioning pin is slidably arranged in the T-shaped hole and its tail end portion at least partially extends to the inner side of the chuck body; the locking screw is threadedly connected to the chuck body and one end of the locking screw abuts against the head end of the positioning pin.

[0006] Preferably, the opening direction of the T-shaped hole is the same as the radial direction of the chuck body.

[0007] Preferably, the plurality of T-shaped holes are evenly distributed around the axis of the chuck body.

[0008] Preferably, the clamping jaw comprises an upper jaw, a lower jaw and a plurality of screws, the lower end of the lower jaw is meshed with the upper end of the large bevel gear, and the upper jaw is fixed to the lower jaw by means of screws; the lower jaw is slidably connected to the chuck body.

[0009] Preferably, the upper end of the chuck body is radially provided with a cross groove having a number corresponding to the clamping claws; and the lower claw is slidably disposed in the cross groove.

[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 that by arranging a locating pin and a locking screw on the chuck body, the locking screw and the locating pin are adjusted to adjust the clamping center of the chuck to a state close to zero with the rotation center of the machine tool spindle. The key is to find the ideal rotation center when clamping a standard inspection rod or clamping a standard workpiece for processing. In this state, the most ideal clamping accuracy can be achieved. When changing a workpiece, installation and alignment are performed again to fully realize the most ideal clamping accuracy of the chuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded schematic diagram of the chuck of the utility model;

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

[0017] Figure 3 It is a schematic diagram of the distribution of the adjustable components of the utility model on the chuck;

[0018] Figure 4 It is a structural schematic diagram of the back cover of the utility model;

[0019] Figure 5 It is a schematic diagram of the connection between the chuck and the fixture plate in the prior art.

[0020] In the figure: 1 chuck body, 2 large bevel gear, 3 upper claw, 4 lower claw, 5 small bevel gear, 6 rear cover, 7 latch, 8 positioning pin, 9 set screw, 10 oil nozzle, 11 connecting screw, 12 rear cover screw, 101 through hole, 102 cross slot, 103 T-shaped hole, 601 rear cover body, 602 support ring. DETAILED DESCRIPTION

[0021] 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.

[0022] Specific embodiment 1: Please refer to Figure 1-4 An adjustable self-centering manual chuck comprises: a chuck body 1, a clamping jaw, a clamping jaw driving assembly and an adjustable assembly, wherein the clamping jaw, the clamping jaw driving assembly and the adjustable assembly are all mounted on the chuck body 1, wherein the clamping jaw is located on the upper side of the clamping jaw driving assembly and is driven by the clamping jaw driving assembly to radially displace to achieve automatic centering and clamping, and the adjustable assembly is located on the lower side of the clamping jaw driving assembly to improve the clamping accuracy of the chuck. The comb-tooth type manual chuck is suitable for clamping workpieces of a circle, a regular triangle or a regular hexagon.

[0023] The chuck body 1 is a cover-like structure with a through hole 101 at the axis center. Three cross grooves 102 connected to the through hole 101 are radially opened at the upper end of the chuck body 1, and three T-shaped holes 103 are radially opened on the outer side of the lower end of the chuck body 1; the three cross grooves 102 and the three T-shaped holes 103 are evenly distributed around the axis center of the through hole 101.

[0024] The claw driving assembly includes a large bevel gear 2, a small bevel gear 5, a rear cover 6, a latch 7 and a rear cover screw 12. The rear cover 6 is composed of a rear cover body 601 and a support ring 602 fixedly arranged at the upper end of the rear cover body 601. The rear cover body 601 is an annular structure. The rear cover body 601 is fixedly arranged at the inner side of the lower end of the chuck body 1 by the rear cover screw 12. The rear cover 6 is located on the upper side of the T-shaped hole 103 to reserve a connection space with the fixture plate.

[0025] The large bevel gear 2 is embedded in 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 to 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 during circumferential rotation; in addition, the large bevel gear 2 is coaxially arranged with the chuck body 1; the large bevel gear 2 is an annular disc structure, and the upper end face of the large bevel gear 2 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 from the side of 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; the axis of the small bevel gear 5 is perpendicular to the axis of the large bevel gear 2; a square hole is provided on the small bevel gear 5 to provide a fulcrum for the wrench; 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 clamping jaws in this embodiment are provided with three groups, and the three groups of clamping jaws are slidably arranged in three cross grooves 102 in a one-to-one correspondence; taking one group of clamping jaws as an example, the clamping jaws include an upper jaw 3, a lower jaw 4 and a plurality of screws, the lower end of the lower jaw 4 is engaged with the Archimedean spiral groove of the large bevel gear 2, and the upper jaw 3 is fixed on the lower jaw 4 by screws; when the small bevel gear 5 is rotated with a wrench, the large bevel gear 2 rotates, and the large bevel gear 2 drives the three groups of clamping jaws to move radially at the same time, thereby realizing automatic centering and clamping.

[0027] In this embodiment, the chuck also includes an oil nozzle 10 and a positioning screw 11 arranged on the chuck body 1, wherein the oil nozzle 10 is used to deliver lubricating oil to the jaw drive assembly; when in use, the chuck body 1 is fixedly mounted to the fixture plate on the lathe spindle by the positioning screw 11.

[0028] The adjustable components are provided with three groups, and the three groups of adjustable components are installed in a one-to-one correspondence with the three T-shaped holes 103; taking one group of adjustable components as an example, the adjustable components include a positioning pin 8 and a locking screw 9, the positioning pin 8 is slidably arranged in the T-shaped hole 103 and a part of the tail end of the positioning pin 8 extends to the inner side of the chuck body 1, the locking screw 9 is arranged on the inner side of the T-shaped hole 103 and the locking screw 9 is threadedly connected to the chuck body 1, and at the same time, one end of the locking screw 9 abuts against the head end of the positioning pin 8, and rotating the locking screw 9 can make the positioning pin 8 radially displaced on the chuck body 1.

[0029] Through this technical solution, by setting a positioning pin 8 and a locking screw 9 on the chuck body, adjusting the locking screw 9 and the positioning pin 8, the clamping center of the chuck is adjusted to a state close to zero with the rotation center of the machine tool spindle. The key is to find the ideal rotation center when clamping a standard inspection rod or clamping a standard workpiece for processing. In this state, the most ideal clamping accuracy can be achieved. When changing to another workpiece, installation and alignment are performed again to fully realize the most ideal clamping accuracy of the chuck.

[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. An adjustable self-centering manual chuck, comprising a chuck body (1), a large bevel gear (2), a small bevel gear (5), a rear cover (6) and three sets of claws, wherein the large bevel gear (2) is movably mounted 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 the three sets of 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 chuck further comprises a plurality of groups of adjustable components movably arranged on the side wall of the chuck body (1), the plurality of groups of adjustable components being distributed around the axis of the chuck body (1) and the adjustable components at least partially extending to the inside of the chuck body (1); the plurality of groups of adjustable components are all located on the lower side of the rear cover (6).

2. An adjustable self-centering manual chuck according to claim 1, characterized in that: A plurality of T-shaped holes (103) are formed on the outer side of the lower end of the chuck body (1); the adjustable component is mounted correspondingly on the inner side of the T-shaped hole (103); the adjustable component comprises a positioning pin (8) and a fixing screw (9); the positioning pin (8) is slidably arranged in the T-shaped hole (103) and its rear end at least partially extends to the inner side of the chuck body (1); the fixing screw (9) is threadedly connected to the chuck body (1) and one end of the fixing screw (9) abuts against the head end of the positioning pin (8).

3. The adjustable self-centering manual chuck according to claim 2, characterized in that: The opening direction of the T-shaped hole (103) is the same as the radial direction of the chuck body (1).

4. The adjustable self-centering manual chuck according to claim 2, characterized in that: The plurality of T-shaped holes (103) are evenly distributed around the axis of the chuck body (1).

5. The adjustable self-centering manual chuck according to claim 1, characterized in that: The clamping jaws comprise an upper jaw (3), a lower jaw (4) and a plurality of screws; the lower end of the lower jaw (4) is meshed with the upper end of the large bevel gear (2); the upper jaw (3) is fixed to the lower jaw (4) by means of screws; and the lower jaw (4) is slidably connected to the chuck body (1).

6. The adjustable self-centering manual chuck according to claim 5, characterized in that: The upper end of the chuck body (1) is radially provided with cross grooves (102) whose number corresponds to the number of the clamping claws; the lower claws (4) are slidably arranged in the cross grooves (102).

7. The adjustable self-centering 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. The adjustable self-centering 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. The adjustable self-centering 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. The adjustable self-centering 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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