Pneumatic three-jaw chuck with rotary adjustment mechanism

Abstract

This utility model relates to the field of three-jaw chuck technology and discloses a pneumatic three-jaw chuck with a rotation adjustment mechanism. It includes a chuck housing, with a clamping mechanism for holding a workpiece inside the housing. An adjustment mechanism for adjusting the clamping mechanism is provided on the outer wall of the housing. The clamping mechanism includes three chuck jaws, all installed inside the housing. A fixed shaft is fixed to the inner wall of each jaw, with a fixed bearing fitted at one end of each shaft and embedded in the inner wall of the housing. The inner surfaces of the three jaws are coated with a wear-resistant coating. This utility model, by setting up a clamping mechanism, enables the three jaws to rotate under the pressure of the workpiece, driving the fixed shaft to rotate. With the cooperation of the fixed bearing, the smoothness of the fixed shaft rotation is ensured, thereby clamping the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of three-jaw chuck technology, specifically a pneumatic three-jaw chuck with a rotation adjustment mechanism. Background Technology

[0002] A pneumatic three-jaw chuck with a rotary adjustment mechanism is a high-efficiency clamping device widely used in machining fields such as CNC lathes. The chuck has high clamping accuracy, which can effectively simplify the installation process and reduce equipment costs. Chucks can be divided into various types according to the number of jaws, such as three-jaw chucks and four-jaw chucks. Among them, the three-jaw chuck is the most widely used type of chuck. There are usually three jaws, which are evenly distributed on the chuck body to clamp the workpiece. The inner side of the jaws usually has a clamping surface or teeth to increase the friction with the workpiece and ensure stable clamping.

[0003] Existing three-jaw chucks are mounted and fixed on a base, and the cylinder is rotated by the output shaft of a servo motor, which in turn drives the jaws to rotate. However, most chucks are inconvenient to adjust during use, and different chucks need to be replaced when clamping and limiting workpieces of different diameters, resulting in poor chuck versatility. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Given that most of the chucks mentioned above or in the prior art are inconvenient to adjust during use, different chucks need to be replaced when clamping and limiting workpieces of different diameters, resulting in poor chuck versatility.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pneumatic three-jaw chuck with a rotation adjustment mechanism includes a chuck housing, the inside of which is provided with a clamping mechanism for clamping a workpiece, and the outer wall of the chuck housing is provided with an adjustment mechanism for adjusting the clamping mechanism.

[0008] The clamping mechanism includes chuck jaws, and there are three chuck jaws. All three chuck jaws are installed inside the chuck housing. The inner walls of the three chuck jaws are fixed with a fixed shaft. One end of the fixed shaft is fitted with a fixed bearing embedded in the inner wall of the chuck housing. The inner surfaces of the three chuck jaws are coated with a wear-resistant coating.

[0009] As a further improvement of this utility model: three limiting cylinders are fixed on one side of the chuck housing, and the wear-resistant coating is made of inorganic zinc silicate.

[0010] As a further improvement of this utility model: the telescopic ends of the three limiting cylinders are all fixed with limiting plates, and the limiting plates are movably connected to the outer surface of the fixed shaft.

[0011] As a further embodiment of this utility model: the adjustment mechanism includes mounting components, and the mounting components are provided in three sets, all of which are fixed to the outer wall of the chuck housing.

[0012] As a further improvement of this utility model: one end of each of the three sets of mounting components is threadedly connected to an adjusting screw, and the upper end of the adjusting screw is fixed with a fixing handle.

[0013] As a further embodiment of this utility model: the end of the adjusting screw is rotatably connected to a movable part via a bearing, and a compression spring is abutted inside the movable part.

[0014] As a further improvement of this utility model: the end of the compression spring is abutted and connected to a movable plate, and two guide rods that are fixedly connected to the mounting component pass through the interior of the movable plate.

[0015] As a further embodiment of this utility model: a connecting rod is fixed to the lower surface of the moving plate, and a fixing head is fixed to the end of the connecting rod through the outer wall of the mounting component, and a ball bearing is installed inside the fixing head.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By setting up a clamping mechanism, this utility model enables the three chuck jaws to rotate due to the pressure of the workpiece, and with the cooperation of the fixed bearing, the smoothness of the rotation of the fixed shaft can be ensured, thereby clamping the workpiece.

[0018] 2. This utility model, by setting an adjustment mechanism, allows the adjustment screw on the mounting part to be turned manually when the fixed handle is turned, thereby driving the adjustment screw to rotate and pushing the movable part to move. This causes the movable part to compress the clamping spring, thus adjusting the tension of the clamping spring and adjusting the clamping force on the workpiece, making it convenient to clamp different workpieces. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of a pneumatic three-jaw chuck with a rotary adjustment mechanism;

[0020] Figure 2 This is a three-dimensional structural diagram of the chuck shell in a pneumatic three-jaw chuck with a rotation adjustment mechanism;

[0021] Figure 3 This is a side view of the chuck housing of a pneumatic three-jaw chuck with a rotation adjustment mechanism.

[0022] Figure 4 This is a schematic diagram of the internal structure of the chuck housing in a pneumatic three-jaw chuck with a rotation adjustment mechanism;

[0023] Figure 5 This is a schematic diagram of the mounting component in a pneumatic three-jaw chuck with a rotation adjustment mechanism.

[0024] In the diagram: 1. Chuck housing; 2. Chuck jaws; 21. Fixed shaft; 22. Fixed bearing; 23. Wear-resistant coating; 3. Limit cylinder; 4. Limit plate; 5. Mounting component; 51. Adjusting screw; 52. Fixed handle; 53. Moving part; 54. Compression spring; 55. Moving plate; 56. Connecting rod; 57. Fixed head; 58. Ball bearing; 59. Guide rod. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0028] Example 1

[0029] Please see Figure 1 - Figure 5 This is the first embodiment of the present utility model. This embodiment provides a pneumatic three-jaw chuck with a rotation adjustment mechanism, including a chuck housing 1. The inside of the chuck housing 1 is provided with a clamping mechanism for clamping a workpiece, and the outer wall of the chuck housing 1 is provided with an adjustment mechanism for adjusting the clamping mechanism.

[0030] The clamping mechanism includes chuck jaws 2, and there are three chuck jaws 2. All three chuck jaws 2 are installed inside the chuck housing 1. The inner walls of the three chuck jaws 2 are fixed with fixed shafts 21. One end of the fixed shafts 21 is fitted with a fixed bearing 22 embedded in the inner wall of the chuck housing 1. The inner surfaces of the three chuck jaws 2 are coated with a wear-resistant coating 23.

[0031] Specifically, three limit cylinders 3 are fixed on one side of the chuck housing 1, and the wear-resistant coating 23 is made of inorganic zinc silicate.

[0032] Furthermore, one end of the workpiece contacts the wear-resistant coating 23 on the inner wall of the chuck jaw 2. At this time, the chuck housing 1 continues to move towards the workpiece, so that the three chuck jaws 2 are squeezed by the workpiece and drive the fixed shaft 21 to rotate.

[0033] Specifically, the extension and retraction ends of the three limit cylinders 3 are all fixed with limit plates 4, and the limit plates 4 are movably connected to the outer surface of the fixed shaft 21.

[0034] Furthermore, the limit cylinder 3 can drive the limit plate 4 to move, so that the inner wall of the limit plate 4 contacts the outer wall of the fixed shaft 21.

[0035] In use, the chuck housing 1 is fixed in a suitable position. During use, the external equipment drives the chuck housing 1 to move towards the workpiece, so that one end of the workpiece contacts the wear-resistant coating 23 on the inner wall of the chuck jaws 2. At this time, the chuck housing 1 continues to move towards the workpiece, so that the three chuck jaws 2 are squeezed by the workpiece and drive the fixed shaft 21 to rotate. With the cooperation of the fixed bearing 22, the smoothness of the rotation of the fixed shaft 21 can be guaranteed. Through the set limit cylinder 3, the limit plate 4 can be driven to move, so that the inner wall of the limit plate 4 contacts the outer wall of the fixed shaft 21, thereby fixing the fixed shaft 21 and ensuring that the chuck jaws 2 will not rotate unexpectedly.

[0036] In summary, this pneumatic three-jaw chuck with a rotary adjustment mechanism can easily clamp workpieces, making it convenient to clamp workpieces of different diameters and achieve automatic adjustment. After clamping, it can fix the jaws to reduce the possibility of workpieces falling off.

[0037] Example 2

[0038] Please see Figure 1 - Figure 5 This is the second embodiment of the present utility model.

[0039] Specifically, the adjustment mechanism includes mounting parts 5, which are provided in three sets. All three sets of mounting parts 5 are fixed to the outer wall of the chuck housing 1. One end of each set of mounting parts 5 is threaded with an adjusting screw 51, and a fixing handle 52 is fixed to the upper end of the adjusting screw 51.

[0040] Furthermore, manually turning the fixed handle 52 can drive the adjusting screw 51 to rotate.

[0041] Specifically, the end of the adjusting screw 51 is rotatably connected to a movable part 53 via a bearing. A compression spring 54 is abutted inside the movable part 53. The end of the compression spring 54 is abutted to a movable plate 55. Two guide rods 59, which are fixedly connected to the mounting part 5, pass through the interior of the movable plate 55.

[0042] Furthermore, by pushing the movable part 53 to move, the movable part 53 compresses the clamping spring 54, which can adjust the tension of the clamping spring 54 and thus adjust the clamping force on the workpiece.

[0043] Specifically, a connecting rod 56 is fixed to the lower surface of the movable plate 55, and a fixing head 57 is fixed to the end of the connecting rod 56 through the outer wall of the mounting part 5. A ball bearing 58 is installed inside the fixing head 57.

[0044] Furthermore, the ball bearings 58 provided on the fixed head 57 can ensure the smoothness of the chuck jaws 2 pushing the fixed head 57.

[0045] In use, the rotation of the chuck jaws 2 pushes the fixed head 57 to move. The ball bearings 58 on the fixed head 57 ensure the smoothness of the chuck jaws pushing the fixed head 57. The movement of the fixed head 57 drives the connecting rod 56 to move, causing the movable plate 55 to push the compression spring 54 to compress. The guide rod 59 ensures the stability of the movable plate 55 during movement. After being compressed, the compression spring 54 generates tension, which applies pressure to the fixed head 57, causing the chuck jaws 2 to clamp and fix the workpiece. By manually turning the fixing handle 52 through the adjusting screw 51 on the mounting part 5, the adjusting screw 51 can be rotated, which in turn pushes the movable part 53 to move, causing the movable part 53 to compress the compression spring 54. This allows adjustment of the tension of the compression spring 54, thereby adjusting the clamping force on the workpiece, making it convenient to clamp different workpieces.

[0046] In summary, this pneumatic three-jaw chuck with a rotary adjustment mechanism can conveniently clamp workpieces, making it easy to grip workpieces of different diameters and achieving automatic adjustment. After clamping, the jaws can be fixed to reduce the possibility of workpieces falling off. Furthermore, the chuck can adjust the clamping force on the workpiece during use, further facilitating the clamping of workpieces of different diameters and ensuring clamping stability.

[0047] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0048] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0049] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pneumatic three-jaw chuck with a rotation adjustment mechanism, comprising a chuck housing (1), characterized in that: The chuck housing (1) is provided with a clamping mechanism for clamping the workpiece inside, and the outer wall of the chuck housing (1) is provided with an adjustment mechanism for adjusting the clamping mechanism. The clamping mechanism includes chuck jaws (2), and there are three chuck jaws (2). All three chuck jaws (2) are installed inside the chuck housing (1). The inner walls of the three chuck jaws (2) are all fixed with a fixed shaft (21). One end of the fixed shaft (21) is fitted with a fixed bearing (22) embedded in the inner wall of the chuck housing (1). The inner surfaces of the three chuck jaws (2) are all coated with a wear-resistant coating (23).

2. A pneumatic three-jaw chuck with a rotation adjustment mechanism according to claim 1, characterized in that: Three limiting cylinders (3) are fixed on one side of the chuck housing (1), and the wear-resistant coating (23) is made of inorganic zinc silicate.

3. A pneumatic three-jaw chuck with a rotation adjustment mechanism according to claim 2, characterized in that: The telescopic ends of the three limiting cylinders (3) are all fixed with limiting plates (4), and the limiting plates (4) are movably connected to the outer surface of the fixed shaft (21).

4. A pneumatic three-jaw chuck with a rotation adjustment mechanism according to claim 1, characterized in that: The adjustment mechanism includes a mounting component (5), which is provided in three sets. All three sets of the mounting components (5) are fixed to the outer wall of the chuck housing (1).

5. A pneumatic three-jaw chuck with a rotation adjustment mechanism according to claim 4, characterized in that: One end of each of the three sets of mounting components (5) is threaded with an adjusting screw (51), and the upper end of the adjusting screw (51) is fixed with a fixing handle (52).

6. A pneumatic three-jaw chuck with a rotation adjustment mechanism according to claim 5, characterized in that: The end of the adjusting screw (51) is rotatably connected to a movable part (53) via a bearing, and a compression spring (54) is abutted inside the movable part (53).

7. A pneumatic three-jaw chuck with a rotation adjustment mechanism according to claim 6, characterized in that: The end of the compression spring (54) is connected to a movable plate (55), and two guide rods (59) that are fixedly connected to the mounting component (5) pass through the interior of the movable plate (55).

8. A pneumatic three-jaw chuck with a rotation adjustment mechanism according to claim 7, characterized in that: A connecting rod (56) is fixed to the lower surface of the movable plate (55). The end of the connecting rod (56) passes through the outer wall of the mounting component (5) and is fixed with a fixing head (57). A ball bearing (58) is installed inside the fixing head (57).

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