Chuck

Abstract

The utility model discloses a chuck, and relates to the technical field of chucks. The chuck comprises a disc, a limiting assembly and an expansion limiting assembly. The disc is provided with at least three sliding grooves, the three sliding grooves are radially distributed around the center of the disc, the included angle between every two adjacent sliding grooves is smaller than 180 degrees, and a fixing shaft is perpendicularly fixed to the center of the bottom face of the disc. The limiting assembly comprises a sliding seat and a first abutting piece, the sliding seat is connected with the sliding groove and can slide in the length direction of the sliding groove, and the first abutting piece is perpendicularly arranged above the disc, is in threaded connection with the sliding seat and is used for abutting against the inner side wall of the roller; the expansion limiting assembly is arranged on the bottom face of the disc and located between the sliding grooves, the expansion limiting assembly comprises a fixing base, a second abutting piece and a locking piece, the fixing base is installed on the edge of the bottom face of the disc, the second abutting piece is slidably connected to the fixing base in the radial direction of the disc and used for abutting against the inner side wall of the roller, and the locking piece is used for locking the second abutting piece to the fixing base. The chuck is good in universality, and the replacement frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chuck technology, specifically to a chuck. Background Technology

[0002] A chuck is a tooling device used to fix workpieces. When performing surface coating processing on some roller-like workpieces, the workpiece is clamped onto a turntable using a chuck. The turntable then rotates both the chuck and the roller-like workpiece, allowing the functional coating to be sprayed onto its surface. However, existing chucks have poor versatility. For rollers with larger diameters, a larger chuck body is required to meet the clamping requirements, increasing the frequency of chuck changes and reducing processing efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a chuck with better versatility and reduce the number of chuck replacements.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A chuck includes a disc, a limiting assembly, and an extended limiting assembly. The disc has at least three grooves radially distributed around its center, with adjacent grooves having an included angle of less than 180°. A fixed shaft is vertically fixed to the center of the disc's bottom surface, and the fixed shaft is used to connect to a rotary drive device. The limiting assembly includes a sliding seat and a first abutment. The sliding seat is connected to the grooves and can slide along the length of the grooves. The first abutment is vertically positioned above the disc and threadedly connected to the sliding seat, and it abuts against the inner wall of a roller. The extended limiting assembly is located on the bottom surface of the disc and between the grooves. The extended limiting assembly includes a fixed seat, a second abutment, and a locking member. The fixed seat is installed on the edge of the disc's bottom surface. The second abutment is slidably connected to the fixed seat along the radial direction of the disc and abuts against the inner wall of the roller. The locking member is used to lock the second abutment onto the fixed seat.

[0006] As a further explanation of the above technical solution:

[0007] The sliding seat includes a first screw, a first limiting ring, and a first handle. The first screw passes vertically through the sliding groove from below the disc. The first limiting ring is coaxially fixed on the first screw and located below the disc. The first handle is vertically fixed to the lower end of the first screw. The first abutting member is a column with a first screw hole at one end that matches the upper end of the first screw.

[0008] The first limiting ring is a nut, which is sleeved on the first screw and fixed by welding.

[0009] The fixing base includes a rectangular groove and connecting ears. A second screw hole is provided through the rectangular groove. The connecting ears are integrally provided on both sides of the rectangular groove and are fixedly connected to the bottom surface of the disc. The second abutting member includes a rectangular plate and a protrusion. The rectangular plate is slidably connected to the rectangular groove, and the protrusion is fixed on the top of the rectangular plate. The locking member includes a second screw, a second limiting ring and a second handle. The second screw is threadedly connected to the second screw hole. The second limiting ring is coaxially fixed on the second screw and located below the fixing base. The second handle is vertically fixed to the lower end of the first screw.

[0010] The second limiting ring is a nut, which is sleeved on the second screw and fixed by welding.

[0011] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0012] For rollers with smaller diameters, this invention uses a limiting assembly for clamping. The sliding seat is moved along the slide groove to a suitable position, and the first handle is rotated to fix the limiting assembly on the disc. The side wall of the first abutment member is used to abut against the inner wall of the roller to complete the positioning and clamping of the roller. For rollers with larger diameters, an extended limiting assembly can be used for clamping. The length of the second abutment member extending beyond the edge of the disc is slidably adjusted, and the second abutment member is fixed to the fixed seat by the locking member. The second abutment member can then abut against the inner wall of the roller to complete the positioning and clamping of the large-sized roller. This invention is applicable to rollers of different diameters and has good versatility. For large-sized rollers, there is no need to replace them with larger discs, reducing the disc volume, saving disc material, and reducing the installation space required for the disc. Attached Figure Description

[0013] One or more embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0015] Figure 2 This is a structural schematic diagram from another perspective of an embodiment of the present utility model;

[0016] Figure 3 This is a cross-sectional view of the limiting component according to an embodiment of the present utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the extended limiting component according to an embodiment of the present utility model.

[0018] The following are the labels in the diagram: 1. Disc; 11. Slide groove; 12. Fixed shaft; 2. Limiting assembly; 21. Sliding seat; 211. First screw; 212. First limiting ring; 213. First handle; 22. First abutment; 221. First screw hole; 3. Extended limiting assembly; 31. Fixed seat; 311. Rectangular groove; 312. Connecting ear; 32. Second abutment; 321. Rectangular plate; 322. Protrusion; 33. Locking element; 331. Second screw; 332. Second limiting ring; 333. Second handle; 4. Second screw hole. Detailed Implementation

[0019] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0020] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] like Figures 1-4 As shown, a chuck includes a disc 1, a limiting component 2, and an extended limiting component 3.

[0022] At least three grooves 11 are provided on the disc 1. The three grooves 11 are radially distributed around the center of the disc 1, and the included angle between adjacent grooves 11 is less than 180°. A fixed shaft 12 is vertically fixed at the center of the bottom surface of the disc 1. The fixed shaft 12 is used to connect to a rotary drive device (not shown in the figure) to drive the fixed shaft 12 to rotate the disc 1. The limiting assembly 2 includes a sliding seat 21 and a first abutment 22. The sliding seat 21 is connected to the groove 11 and can slide along the length direction of the groove 11. An abutment 22 is vertically disposed above the disc 1 and threadedly connected to the sliding seat 21, and is used to abut against the inner wall of the roller; an extension limiting assembly 3 is disposed on the bottom surface of the disc 1 and located between the sliding grooves 11. The extension limiting assembly 3 includes a fixed seat 31, a second abutment 32 and a locking member 33. The fixed seat 31 is installed on the edge of the bottom surface of the disc 1. The second abutment 32 is slidably connected to the fixed seat 31 along the radial direction of the disc 1 and is used to abut against the inner wall of the roller. The locking member 33 is used to lock the second abutment 32 onto the fixed seat 31.

[0023] Specifically, the sliding seat 21 includes a first screw 211, a first limiting ring 212, and a first handle 213. The first screw 211 passes vertically through the slide groove 11 from below the disk 1. The first limiting ring 212 is coaxially fixed on the first screw 211 and located below the disk 1. The first handle 213 is vertically fixed to the lower end of the first screw 211. The first abutting member 22 is a column, and one end of the first abutting member 22 is provided with a first screw hole 221 that matches the upper end of the first screw 211. It should be noted that the outer diameters of the first abutment 22 and the first limiting ring 212 are larger than the width of the slide groove 11. By rotating the first handle 213, the length of the first screw 211 screwed into the first screw hole 221 is increased, which allows the first abutment 22 and the first limiting ring 212 to press against the top and bottom surfaces of the slide groove 11 respectively, thereby fixing the limiting assembly 2 onto the disc 1. In use, depending on the diameter of the roller, rotating the first handle 213 reduces the length of the first screw 211 screwed into the first screw hole 221, which releases the pressing state of the first abutment 22 and the first limiting ring 212 against the top and bottom surfaces of the slide groove 11 respectively. This allows the sliding seat 21 to be moved to a suitable position on the slide groove 11, so that the side wall of the first abutment 22 contacts the inner side wall of the roller. Finally, the limiting assembly 2 is locked, and the side wall of the first abutment 22 abuts against the inner side wall of the roller, completing the positioning and clamping of the roller.

[0024] Preferably, the first limiting ring 212 is a nut, which is sleeved on the first screw 211 and fixedly connected to the first screw 211 by welding.

[0025] Specifically, the fixing base 31 includes a rectangular groove 311 and a connecting ear 312. A second screw hole 4 is provided through the rectangular groove 311. The connecting ear 312 is integrally provided on both sides of the rectangular groove 311 and is fixedly connected to the bottom surface of the disc 1 by welding. The second abutment 32 includes a rectangular plate 321 and a protrusion 322. The rectangular plate 321 is slidably connected to the rectangular groove 311, and the protrusion 322 is fixedly connected to the top of the rectangular plate 321. The locking member 33 includes a second screw 331, a second limiting ring 332 and a second handle 333. The second screw 331 is adapted to the second screw hole 4. The second limiting ring 332 is coaxially fixed on the second screw 331 and located below the fixing base 31. The second handle 333 is vertically fixed to the lower end of the first screw 211. It should be noted that when a roller with a larger diameter needs to be clamped, the limiting component 2 is no longer sufficient. In this case, the extended limiting component 3 can be used to position and clamp the roller. First, adjust the length of the rectangular plate 321 extending beyond the edge of the disc 1 so that the outer side of the protrusion 322 contacts the inner wall of the roller. Then, tighten the second screw 331. The connecting end of the second screw 331 passes through the second screw hole 4 and presses against the rectangular plate 321, thereby fixing the rectangular plate 321 on the rectangular groove 311. The outer side of the protrusion 322 can then abut against the inner wall of the roller, completing the positioning and clamping of the large-sized roller. When the extended limiting component 3 is not in use, the rectangular plate 321 can be slidably adjusted to retract.

[0026] Preferably, the second limiting ring 332 is a nut, which is sleeved on the second screw 331 and fixedly connected to the second screw 331 by welding.

[0027] The working principle of this chuck is as follows: For rollers with smaller diameters, the limiting component 2 is used for clamping. The sliding seat 21 is moved along the slide groove 11 to a suitable position. The first handle 213 is rotated to fix the limiting component 2 on the disc 1. The side wall of the first abutment 22 is used to abut against the inner side wall of the roller to complete the positioning and clamping of the roller. For rollers with larger diameters, the extended limiting component 3 is used for clamping. The length of the second abutment 32 extending out of the edge of the disc 1 is slidably adjusted. The second screw 331 is tightened to fix the second abutment 32 on the fixed seat 31. The protrusion 322 on the second abutment 32 abuts against the inner side wall of the roller to complete the positioning and clamping of the large-sized roller. This utility model can be applied to rollers of different sizes and specifications. For large-sized rollers, there is no need to replace the disc 1 with a larger size, which reduces the volume of the disc 1, saves the material of the disc 1, and reduces the installation space required by the disc 1.

[0028] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A chuck, characterized in that: Includes a disk, a limiting component, and an extended limiting component; The disk has at least three grooves, which are radially distributed around the center of the disk, and the included angle between adjacent grooves is less than 180°. A fixed shaft is vertically fixed at the center of the bottom surface of the disk, and the fixed shaft is used to connect to the rotary drive device. The limiting component includes a sliding seat and a first abutting member. The sliding seat is connected to the slide groove and can slide along the length of the slide groove. The first abutting member is vertically disposed above the disc and threadedly connected to the sliding seat. It is used to abut against the inner wall of the roller. The extended limiting component is disposed on the bottom surface of the disc and located between the sliding grooves. The extended limiting component includes a fixed base, a second abutment and a locking member. The fixed base is installed on the edge of the bottom surface of the disc. The second abutment is slidably connected to the fixed base along the radial direction of the disc and is used to abut against the inner side wall of the roller. The locking member is used to lock the second abutment on the fixed base.

2. A chuck according to claim 1, characterized in that: The sliding seat includes a first screw, a first limiting ring, and a first handle. The first screw passes vertically through the sliding groove from below the disc. The first limiting ring is coaxially fixed on the first screw and located below the disc. The first handle is vertically fixed to the lower end of the first screw. The first abutting member is a column with a first screw hole at one end that matches the upper end of the first screw.

3. A chuck according to claim 2, characterized in that: The first limiting ring is a nut, which is sleeved on the first screw and fixed by welding.

4. A chuck according to claim 2, characterized in that: The fixing base includes a rectangular groove and connecting ears. A second screw hole is provided through the rectangular groove. The connecting ears are integrally provided on both sides of the rectangular groove and are fixedly connected to the bottom surface of the disc. The second abutting member includes a rectangular plate and a protrusion. The rectangular plate is slidably connected to the rectangular groove, and the protrusion is fixed to the top of the rectangular plate. The locking member includes a second screw, a second limiting ring, and a second handle. The second screw is threadedly connected to the second screw hole. The second limiting ring is coaxially fixed on the second screw and located below the fixing base. The second handle is vertically fixed to the lower end of the first screw.

5. A chuck according to claim 4, characterized in that: The second limiting ring is a nut, which is sleeved on the second screw and fixed by welding.

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