Three-jaw chuck with adjustable jaws

Abstract

The utility model relates to the technical field of three-jaw chucks, in particular to a three-jaw chuck with adjustable jaws, which comprises a shell, a rotating plate and a base, the base is detachably connected to the lower end of the rotating plate, the shell is rotatably connected to the upper end of the rotating plate, and a threaded block is fixedly arranged at the upper end of the rotating plate; three sliding grooves are formed in the shell, a guide block is arranged in each sliding groove in a sliding mode, a clamping jaw positioning block is fixedly arranged at the upper end of each guide block, and a positioning clamping jaw is detachably arranged at the upper end of each clamping jaw positioning block; four positioning protrusions are fixedly arranged on the two sides, close to the shell, of each clamping jaw positioning block respectively, moving teeth are fixedly arranged at the lower end of each guide block, and the three moving teeth are meshed with the threaded block. By increasing the fixing positions of the clamping jaws, under the condition that the space is limited, the variation range of the clamping caliber of the chuck is effectively enlarged.

Description

Technical Field

[0001] The utility model relates to the technical field of three - jaw chucks, and particularly relates to a three - jaw chuck with adjustable jaws. Background Technique

[0002] The three - jaw chuck is a general fixture widely used in metal cutting machine tools such as lathes. Its main feature is to realize the automatic centering and clamping of workpieces through three jaws. The three - jaw chuck has been widely used in the field of machining due to its simple structure, convenient operation, and strong versatility. However, in applications with high - precision requirements, more advanced types of chucks may need to be considered to meet higher precision requirements.

[0003] Currently, the following areas for improvement still exist in the existing technology: The range of the clampable diameter of the three - jaw chuck is generally determined by the stroke of the jaw drive structure. The larger the range of change in the clampable diameter, the longer the stroke of the jaw drive structure, and the larger the volume of the three - jaw chuck. If a larger range of clampable diameter is required, a three - jaw chuck with a larger volume is needed, or movable jaws with different shapes need to be customized to achieve the change in the clampable diameter. Summary of the Utility Model

[0004] To solve the above problems existing in the prior art, the utility model provides a three - jaw chuck with adjustable jaws, which can effectively enlarge the range of change in the clampable diameter of the chuck under limited space conditions by increasing the fixed positions of the jaws.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A three - jaw chuck with adjustable jaws includes a housing, a rotating plate, and a base. The base is detachably connected to the lower end of the rotating plate, the housing is rotatably connected to the upper end of the rotating plate, and a threaded block is fixedly arranged at the upper end of the rotating plate;

[0007] Three sliding grooves are formed in the housing, a guide block is slidably arranged in each sliding groove, a jaw positioning block is fixedly arranged at the upper end of each guide block, and a positioning jaw is detachably arranged at the upper end of each jaw positioning block;

[0008] Four positioning protrusions are respectively fixedly arranged on both sides of each jaw positioning block close to the housing, a moving tooth is fixedly arranged at the lower end of each guide block, and the three moving teeth are meshed with the threaded block.

[0009] Further, the rotating plate and the threaded block are integrated, and the guide block and the moving tooth are integrated.

[0010] Further, the three guide blocks are all rotatably connected to the rotating plate.

[0011] Further, every eight of the positioning protrusions are evenly distributed on both sides of each jaw positioning block.

[0012] Further, a groove is respectively formed at both inner ends of the positioning jaw, and the groove is fitted with the positioning protrusion.

[0013] Further, the positioning jaw and the jaw positioning block are fixedly connected by bolts, and the jaw positioning block and the guide block are fixedly connected by bolts.

[0014] Further, a texture is provided at the edge of the rotating plate, the texture is a wavy pattern, and a through hole is formed at the center position of the housing.

[0015] Further, the included angle between the three jaw positioning blocks is 120°.

[0016] The beneficial effects of the utility model are as follows:

[0017] (1) By providing a rotating plate, a guide block, a threaded block and a moving tooth, the technical effect that can be achieved is that the base is detachably connected to the lower end of the rotating plate, the housing is rotatably connected to the upper end of the rotating plate, a threaded block is fixedly provided at the upper end of the rotating plate, three sliding grooves are formed on the housing, a guide block is slidably provided in each sliding groove, a jaw positioning block is fixedly provided at the upper end of each guide block, and a positioning jaw is detachably provided at the upper end of each jaw positioning block. The threaded block and the moving tooth can effectively enlarge the variable range of the clamping diameter of the chuck by increasing the fixing position of the jaw. In the case of limited space, it is not necessary to completely disassemble the whole for position adjustment, which is more convenient, and more positions can be adjusted, making the adjustment more accurate.

[0018] (2) By providing a positioning protrusion, a positioning jaw and a jaw positioning block, the technical effect that can be achieved is that four positioning protrusions are respectively fixedly provided on both sides of each jaw positioning block close to the housing, a moving tooth is fixedly provided at the lower end of each guide block, the three moving teeth are engaged with the threaded block, the rotating plate and the threaded block are integrally formed, the guide block and the moving tooth are integrally formed, the three guide blocks are all rotatably connected to the rotating plate, every eight positioning protrusions are evenly distributed on both sides of each jaw positioning block, a groove is respectively formed at both inner ends of the positioning jaw, and the groove is fitted with the positioning protrusion. The positioning jaw and the jaw positioning block are fixedly connected by bolts, and the jaw positioning block and the guide block are fixedly connected by bolts. The position of the positioning jaw can be adjusted by the positioning protrusion, and the engagement between the positioning protrusion and the groove can limit the positioning jaw to prevent the movement of the positioning jaw and avoid removing the whole positioning jaw to adjust the position, which saves more human and time resources.

[0019] (3) By setting the guiding blocks and the housing, the achievable technical effect is that when it is necessary to adjust the positioning jaws of the three-jaw chuck, rotate the housing. The moving teeth on the three guiding blocks rotate inward along the threaded block, driving the guiding blocks to move inward along the sliding grooves. The positioning jaws can switch between different positioning protrusion positions to adjust the positions of the positioning jaws. The guiding blocks can slide in the sliding grooves, and the positions of the three positioning jaws are adjusted by means of threads, with more uniform force and smaller overall volume of the positioning jaws, saving manufacturing costs. Description of the Drawings

[0020] For the convenience of those skilled in the art to understand, the following further describes the present utility model in conjunction with the accompanying drawings.

[0021] Figure 1 Is a perspective view of the present utility model;

[0022] Figure 2 Is a bottom view of the present utility model;

[0023] Figure 3 Is a front view of the present utility model;

[0024] Figure 4 Is a perspective view of the present utility model with the housing removed;

[0025] Figure 5 Is a top view of the guiding block, jaw positioning block and positioning jaw in the present utility model;

[0026] Figure 6 Is a left view of the guiding block, jaw positioning block and positioning jaw in the present utility model;

[0027] Figure 7 Is a front view of the guiding block, jaw positioning block and positioning jaw in the present utility model;

[0028] Main element symbol description:

[0029] In the figure: 1, housing; 2, rotating plate; 3, base; 4, guiding block; 5, jaw positioning block; 6, positioning jaw; 7, positioning protrusion; 8, threaded block; 9, moving tooth. Detailed implementation manners

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] Referring to Figures 1 to 7 , a three-jaw chuck with adjustable jaws disclosed in the present utility model includes a housing 1, a rotating plate 2 and a base 3. The base 3 is detachably connected to the lower end of the rotating plate 2, the housing 1 is rotatably connected to the upper end of the rotating plate 2, and a threaded block 8 is fixedly provided at the upper end of the rotating plate 2.

[0034] Three sliding grooves are formed in the housing 1, a guiding block 4 is slidably arranged in each sliding groove, a jaw positioning block 5 is fixedly provided at the upper end of each guiding block 4, and a positioning jaw 6 is detachably provided at the upper end of each jaw positioning block 5.

[0035] Four positioning protrusions 7 are respectively fixedly provided on both sides of each jaw positioning block 5 close to the housing 1, a moving tooth 9 is fixedly provided at the lower end of each guiding block 4, and the three moving teeth 9 are engaged with the threaded block 8.

[0036] The rotating plate 2 and the threaded block 8 are integrated, and the guiding block 4 and the moving tooth 9 are integrated. The three guiding blocks 4 are all rotatably connected to the rotating plate 2. Every eight positioning protrusions 7 are evenly distributed on both sides of each jaw positioning block 5.

[0037] The threaded block 8 and the moving tooth 9 can effectively enlarge the variation range of the clamping diameter of the chuck by increasing the fixed positions of the jaws. In the case of limited space, it is not necessary to completely disassemble the whole for position adjustment, which is more convenient, and more positions can be adjusted, making the adjustment more accurate.

[0038] On the inner sides of both ends of the positioning jaw 6, a groove is respectively provided, and the groove fits with the positioning protrusion 7. The positioning jaw 6 and the jaw positioning block 5 are fixedly connected by bolts, and the jaw positioning block 5 and the guide block 4 are fixedly connected by bolts.

[0039] The position of the positioning jaw 6 can be adjusted through the positioning protrusion 7. The fit between the positioning protrusion 7 and the groove can limit the positioning jaw 6 to prevent the movement of the positioning jaw 6, avoiding removing the entire positioning jaw 6 to adjust the position, which saves more human and time resources.

[0040] The edge of the rotating plate 2 is provided with a texture, and the texture is a wavy pattern. A through hole is provided at the central position of the housing 1. The included angle between the three sliding grooves is 120°, and the included angle between the three jaw positioning blocks 5 is 120°.

[0041] The guide block 4 can slide in the sliding groove, and the positions of the three positioning jaws 6 are adjusted by means of threads. The force is more uniform, and the overall volume of the positioning jaw 6 is also smaller, saving manufacturing costs.

[0042] The stroke of the threaded block 8 is H1, the spacing of the positioning protrusions 7 is H2, and the unilateral quantity of the positioning protrusions 7 is n.

[0043] When the stroke H1 of the threaded block 8 ≥ the spacing H2 of the positioning protrusions 7, within a limited space and without changing the shape of the jaws, by adjusting the position of the positioning jaw 6 on the jaw positioning block 5, the continuously variable range of the clamping diameter of the three-jaw chuck can be extended from H1 to nH2.

[0044] If the stroke H1 of the equidistant thread < the spacing H2 of the positioning protrusions 7, the variable range of the clamping diameter of the three-jaw chuck is extended from H1 to nH1, but the clamping diameter is not continuous.

[0045] The working principle and usage process of the present utility model: When it is necessary to adjust the positioning jaw 6 of the three-jaw chuck, rotate the housing 1, the moving teeth 9 on the three guide blocks 4 rotate inward along the threaded block 8, driving the guide blocks 4 to move inward along the sliding grooves. The positioning jaw 6 can switch between different positions of the positioning protrusions 7 to adjust the position of the positioning jaw 6.

[0046] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A three-jaw chuck with adjustable jaws, characterized in that: It includes a housing (1), a rotating plate (2) and a base (3). The base (3) is detachably connected to the lower end of the rotating plate (2), and the housing (1) is rotatably connected to the upper end of the rotating plate (2). A threaded block (8) is fixedly arranged at the upper end of the rotating plate (2). Three sliding grooves are formed in the housing (1), and a guiding block (4) is slidably arranged in each sliding groove. A claw positioning block (5) is fixedly arranged at the upper end of each guiding block (4), and a positioning claw (6) is detachably arranged at the upper end of each claw positioning block (5). Four positioning protrusions (7) are respectively fixedly arranged on both sides of each claw positioning block (5) close to the housing (1). A moving tooth (9) is fixedly arranged at the lower end of each guiding block (4), and the three moving teeth (9) are meshed with the threaded block (8).

2. The three-jaw chuck with adjustable jaws according to claim 1, characterized in that: The rotating plate (2) and the threaded block (8) are integrated, and the guiding block (4) and the moving tooth (9) are integrated.

3. The three-jaw chuck with adjustable jaws according to claim 2, characterized in that: The three guiding blocks (4) are all rotatably connected to the rotating plate (2).

4. A three-jaw chuck with adjustable jaws according to claim 1, characterized in that: Every eight positioning protrusions (7) are evenly distributed on both sides of each claw positioning block (5).

5. A three-jaw chuck with adjustable jaws according to claim 1, characterized in that: A groove is respectively formed at both inner ends of the positioning claw (6), and the groove is fitted with the positioning protrusion (7).

6. The three-jaw chuck with adjustable jaws according to claim 1, characterized in that: The positioning claw (6) and the claw positioning block (5) are fixedly connected by bolts, and the claw positioning block (5) and the guiding block (4) are fixedly connected by bolts.

7. The three-jaw chuck with adjustable jaws according to claim 1, characterized in that: A texture is provided at the edge of the rotating plate (2), and the texture is a wavy pattern. A through hole is formed at the central position of the housing (1).

8. A three-jaw chuck with adjustable jaws according to claim 1, characterized in that: The included angle between the three claw positioning blocks (5) is 120°.

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