A square ultra-thin manual chuck

Abstract

The utility model relates to the technical field of chucks, in particular to a square ultra-thin manual chuck, comprising a chuck body, a large gear, a small gear, a back cover and a plurality of claws, wherein the large gear is movably arranged on the inner side of the chuck body through the back cover, a plurality of claws are slidably arranged on the upper end of the chuck body and the claws are meshed with the large gear, the small gear is arranged on the chuck body, wherein the lower end of the small gear is meshed with the large gear and the upper part extends to the upper side of the chuck body, the chuck also includes a positioning assembly; the chuck body is provided with a disc tongue; a U-shaped groove is opened on the disc tongue; the positioning assembly is installed at the lower end of the chuck body and its position corresponds to the U-shaped groove. The utility model can reduce the adjustment time and improve the installation efficiency of the chuck.

Description

Technical Field

[0001] The utility model relates to the technical field of chucks, and specifically relates to a square ultra-thin manual chuck. Background Art

[0002] The 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 jaws evenly distributed on the chuck body move radially to clamp and position the workpiece. The chuck body of the traditional self-centering chuck is a cylinder, and its connection method is center positioning and axial circular array screw locking around. Since the driving gear of the chuck is perpendicular to the outer cylindrical surface of the chuck body, the workpiece must be clamped from the side of the chuck using a wrench, which is not convenient to operate on a drilling machine or a slotting machine. This requires the thickness of the chuck body to reach a certain level to meet the space for the wrench to rotate, but such a design will sacrifice part of the Z-axis processing space, and the chuck is not flexible enough to use. An existing patent is an improved four-jaw self-centering chuck, publication number: CN201012470Y. The transmission form of spur gears and coil wire is adopted, and the central adjustment hole of the spur gear is located on the front of the disc body, which expands the processing space of the Z axis. In this patent, the chuck is fixed on a sawing machine, a milling machine, and a machining center by opening a U-shaped groove on the chuck to cooperate with bolts. However, when using it, the U-shaped groove needs to be manually aligned with the slot before it can be fixed, which increases the adjustment time and is not fast and flexible enough to use. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a square ultra-thin manual chuck, which can reduce the adjustment time and improve the installation efficiency of the chuck.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a square ultra-thin manual chuck, comprising a chuck body, a large gear, a small gear, a back cover and a plurality of claws, wherein the large gear is movably arranged on the inner side of the chuck body through the back cover, and the plurality of claws are slidably arranged on the upper end of the chuck body and the claws are meshed with the large gear, and the small gear is arranged on the chuck body, wherein the lower end of the small gear is meshed with the large gear and the upper part extends to the upper side of the chuck body, and the chuck also includes a positioning assembly; the chuck body is provided with a disk tongue; a U-shaped groove is opened on the disk tongue; the positioning assembly is installed at the lower end of the chuck body and its position corresponds to the U-shaped groove.

[0005] Preferably, the positioning assembly comprises a positioning key and a positioning screw; the positioning key is fixed to the lower end of the chuck body by the positioning screw.

[0006] Preferably, the positioning key is a square block structure.

[0007] Preferably, the pinion gear is composed of a rotating rod and a pinion gear body; the pinion gear body is arranged inside the chuck body and meshes with the outer edge of the large gear; the lower end of the rotating rod is fixedly connected to the pinion gear body, and the upper part extends to the upper side of the chuck body.

[0008] Preferably, the axis of the pinion gear is perpendicular to the disc surface of the chuck body.

[0009] Preferably, the chuck body is a square cover-like structure with a through hole at the center; the plurality of claws are evenly distributed around the axis of the through hole.

[0010] Preferably, the through hole, the large gear and the rear cover are coaxial.

[0011] Preferably, the chuck further comprises a plurality of connecting screws; the plurality of connecting screws penetrate the chuck body longitudinally.

[0012] Preferably, the chuck further comprises an oil nozzle; the oil nozzle is arranged at the upper end of the chuck body.

[0013] Preferably, the clamping claw comprises an upper claw, a lower claw and a fastening screw; the upper claw is fixed on the lower claw by the fastening screw; and the lower end of the lower claw is meshed with the large gear.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: by changing the meshing mode of the small gear and the large gear, the axis center of the small gear is perpendicular to the disk surface of the chuck body. When the chuck is operated with a wrench, 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; by adding positioning keys and other parts at the bottom of the chuck, the installation efficiency of the chuck is improved, making the use of the chuck more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a schematic cross-sectional view 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 It is a schematic diagram of the lower structure of the chuck of the utility model.

[0019] In the figure: 1 chuck body, 2 large gear, 3 upper jaw, 4 lower jaw, 5 small gear, 6 rear cover, 7 T-type wrench, 8 spacer, 9 rear cover screw, 10 positioning key, 11 connecting screw, 12 T-type screw set, 13 hexagonal wrench, 14 fastening screw, 15 C-type retaining ring, 16 positioning screw, 17 grease nozzle, 101 through hole, 102 cross slot, 103 disc tongue, 104 U-shaped slot. DETAILED DESCRIPTION

[0020] 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.

[0021] Specific embodiment 1: Please refer to Figure 1-4 A square ultra-thin manual chuck comprises: a square-structured chuck body 1, claws, a claw driving assembly, a connecting assembly, and tools required for the chuck, a T-shaped wrench 7 and a hexagonal wrench 13. The claws are provided in four groups, and the four groups of claws and the claw driving assembly are all arranged on the chuck body 1. Under the action of the claw driving assembly, the four groups of claws can move centripetally at the same time to achieve automatic centering and clamping. The manual chuck is suitable for clamping workpieces of round, regular triangle or regular hexagon shape; in addition, when the manual chuck is used, the chuck is fixed to a workbench or a fixture plate through a connecting assembly.

[0022] The chuck body 1 is a square cover-like structure with a through hole 101 at the center. Four cross grooves 102 are provided at the upper end of the chuck body 1 and around the axis of the through hole 101; the left and right ends of the chuck body 1 are provided with disc tongues 103, and the two disc tongues 103 are provided with U-shaped grooves 104. In order to match the U-shaped grooves 104, the chuck is also equipped with a T-shaped screw group 12. The chuck can be fixed on the workbench by the cooperation of the T-shaped screw group 12 and the U-shaped groove 104.

[0023] The claw driving assembly includes a large gear 2, a small gear 5, a rear cover 6, a cushion block 8, a rear cover screw 9 and a C-shaped retaining ring 15. The rear cover 6 is fixed to the inner side of the lower end of the chuck body 1 by the rear cover screw 9.

[0024] The large gear 2 is an annular structure, and an Archimedean spiral groove is provided on its upper end face, and gear teeth are provided on the outer edge of the large gear 2; the large gear 2 is arranged in the cavity on the inner side of the chuck body 1 and the large gear 2 is located on the upper side of the rear cover 6, and the large gear 2 is slidingly connected to the chuck body 1 and the rear cover 6. In addition, the large gear 2, the rear cover 6 and the through hole 101 are coaxially arranged, and under the support of the rear cover 6, the large gear 2 can rotate circumferentially under the drive of external force; the small gear 5 is arranged on the chuck body 1 through a gasket 8 and a C-shaped retaining ring 15. Specifically, the small gear 5 is composed of a rotating rod and a small gear body. The small gear body is arranged on the inner side of the chuck body 1 through a gasket 8 and a C-shaped retaining ring 15 and meshes with the gear teeth of the large gear 2, and the upper part of the rotating rod extends to the upper side of the chuck body 1; further, the axis of the small gear 5 is perpendicular to the disk surface of the chuck body 1; when the small gear 5 is rotated by the T-type wrench 7, the large gear 2 rotates.

[0025] Four groups of clamping jaws are arranged corresponding to four cross grooves 102, and the clamping jaws are slidably connected to the chuck body 1; taking one group of clamping jaws as an example, the clamping jaws include an upper jaw 3, a lower jaw 4 and a fastening screw 14, the upper jaw 3 is fixed to the upper end of the lower jaw 4 by the fastening screw 14, and the lower end of the lower jaw 4 is engaged with the Archimedean spiral groove of the large gear 2; when the small gear 5 is manually rotated using a T-type wrench 7, the large gear 2 rotates, and the large gear 2 drives the four groups of clamping jaws to move centripetally at the same time, realizing automatic centering and clamping.

[0026] Compared with the existing chucks, when using the present chuck to clamp a workpiece, a wrench is used for operation. Since the wrench is located on the upper side of the 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 present chuck.

[0027] Furthermore, in order to cooperate with the U-shaped groove and the T-shaped screw group 12 to achieve rapid fixation, the chuck has been further improved:

[0028] The connecting component includes a positioning key 10 and a positioning screw 16, and the positioning key 10 is fixed to the lower end of the chuck body 1 by the positioning screw 16; further, the connecting component has two groups, and the two positioning keys 10 correspond to the two U-shaped groove positions one by one; when installing the present chuck, the chuck body 1 is first positioned on the workbench by the positioning key 10, and then the chuck body 1 is fixed to the workbench by the T-screw group 12. It can be considered that the positioning key 10 can improve the installation efficiency of the present chuck.

[0029] In this embodiment, the positioning key 10 is a square block structure; in other embodiments, the shape of the positioning key can be changed accordingly according to actual needs.

[0030] In addition, the chuck also includes a plurality of connecting screws 11, and the chuck body 1 can be fixedly connected to the fixture plate through the connecting screws 11. When connected, the connecting screws 11 longitudinally penetrate the chuck body 1 and are threadedly connected to the fixture plate.

[0031] In this embodiment, the chuck further comprises an oil nozzle 10 , which is arranged on the chuck body 1 , and is used to deliver lubricating oil to the jaw driving assembly.

[0032] Through the technical solution, the meshing mode of the small gear and the large gear is changed so that the axis of the small gear is perpendicular to the disk surface of the chuck body. When the chuck is operated with a wrench, 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; by adding positioning keys and other parts at the bottom of the chuck, no adjustment is required during installation, thereby improving the installation efficiency of the chuck and making the use of the chuck more flexible.

[0033] 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 square ultra-thin manual chuck, comprising a square chuck body (1), a large gear (2), a small gear (5), a rear cover (6) and a plurality of claws, wherein the large gear (2) is movably arranged on the inner side of the chuck body (1) through the rear cover (6), the plurality of claws are slidably arranged on the upper end of the chuck body (1) and the claws are meshed with the large gear (2), the small gear (5) is arranged on the chuck body (1), wherein the lower end of the small gear (5) is meshed with the large gear (2) and the upper part extends to the upper side of the chuck body (1), characterized in that: The chuck further comprises a positioning assembly; the chuck body (1) is provided with a tongue (103); a U-shaped groove is provided on the tongue (103); the positioning assembly is mounted at the lower end of the chuck body (1) and its position corresponds to the U-shaped groove.

2. A square ultra-thin manual chuck according to claim 1, characterized in that: The positioning assembly comprises a positioning key (10) and a positioning screw (16); the positioning key (10) is fixed to the lower end of the chuck body (1) via the positioning screw (16).

3. A square ultra-thin manual chuck according to claim 2, characterized in that: The positioning key (10) is a square block structure.

4. A square ultra-thin manual chuck according to claim 1, characterized in that: The pinion gear (5) is composed of a rotating rod and a pinion gear body; the pinion gear body is arranged on the inner side of the chuck body (1) and meshes with the outer edge of the large gear (2); the lower end of the rotating rod is fixedly connected to the pinion gear body, and the upper part extends to the upper side of the chuck body (1).

5. A square ultra-thin manual chuck according to claim 1 or 4, characterized in that: The axis of the pinion gear (5) is perpendicular to the disc surface of the chuck body (1).

6. A square ultra-thin manual chuck according to claim 1, characterized in that: The chuck body (1) is a square cover-shaped structure with a through hole (101) provided at the center; the plurality of chuck claws are evenly distributed around the axis of the through hole (101).

7. A square ultra-thin manual chuck according to claim 6, characterized in that: The through hole (101), the large gear (2) and the rear cover (6) are coaxial.

8. A square ultra-thin manual chuck according to claim 1, characterized in that: The chuck further comprises a plurality of connecting screws (11); the plurality of connecting screws (11) penetrate the chuck body (1) longitudinally.

9. A square ultra-thin manual chuck according to claim 1, characterized in that: The chuck further comprises an oil nozzle (17); the oil nozzle (17) is arranged at the upper end of the chuck body (1).

10. A square ultra-thin manual chuck according to claim 1, characterized in that: The clamping claw comprises an upper claw (3), a lower claw (4) and a fastening screw (14); the upper claw (3) is fixed on the lower claw (4) by means of the fastening screw (14); and the lower end of the lower claw (4) is meshed with the large gear (2).

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