Cylinder collet chuck with pre-positioning bosses

Abstract

The utility model discloses a kind of air cylinder multi-claw chuck with pre-positioning boss, including air cylinder multi-claw chuck body, air cylinder multi-claw chuck body includes cylinder and multiple telescopic clamping jaw, multiple telescopic clamping jaw is used to hold the outer periphery of product, and multiple telescopic clamping jaw is formed product clamping area in the front end face of cylinder;The front end face of cylinder is provided with pre-positioning boss, and pre-positioning boss is located in the center position of product clamping area and is forwardly protruding arrangement;The front end face of pre-positioning boss is as pre-positioning end face, and it is used to pre-position the rear end face of product;The front end face center position of pre-positioning boss is provided with center positioning part, and it is used to pre-position the rear end center of product;And, the front end of pre-positioning boss and center positioning part is kept front and back interval with the clamping part of telescopic clamping jaw. Through the setting of pre-positioning boss, product positioning is more accurate, especially the center axis position alignment degree is improved, and size control precision is better when subsequent other end of product is processed.

Description

Technical Field

[0001] This utility model relates to the field of cylinder grippers, and in particular to a multi-jaw cylinder gripper that also has a pre-positioning boss. Background Technology

[0002] Cylinder grippers are a common type of industrial automation equipment, typically standard parts that can be directly purchased from the market. Taking cylindrical cylinder grippers as an example, they are mainly used for gripping, handling, and positioning cylindrical workpieces.

[0003] The cylindrical cylinder gripper mainly consists of a cylinder body and multiple telescopic grippers extending from the outer periphery of the cylinder body. These telescopic grippers hold the outer periphery of the product, forming a product gripping area around the front end of the cylinder body. The cylinder body is the main body of the cylinder, providing space for piston movement. It typically has high strength and sealing to ensure normal cylinder operation. Inside the cylinder body is a piston, which is moved by air pressure, transmitting force to a linkage mechanism. The piston's movement is the core of the cylinder's operation, determining the opening and closing of the grippers. A linkage mechanism connects the telescopic grippers and the piston, converting the piston's linear motion into the gripper's opening and closing motion. This conversion mechanism allows the cylinder to effectively control the gripper's clamping and releasing actions. Additionally, the cylinder body has an air inlet and an air outlet for charging and discharging gas into the cylinder, respectively, with gas intake and exhaust controlled by a control valve.

[0004] In practical applications, with multiple telescopic grippers open, manual or robotic loading places the product into the grippers, which then hold it in place before releasing it. Because it's difficult for manual or robotic loading to align the product with the theoretical center axis of the grippers, and the rear end of the product is suspended, relying solely on multiple grippers can lead to initial positional shifts (especially center shifts). This results in suboptimal dimensional control during subsequent front-end machining operations (such as drilling, turning, and inspection). Improving dimensional control accuracy requires highly precise robotic loading control, but such robotic arms are expensive.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a cylinder multi-jaw chuck with a pre-positioning boss. By setting the pre-positioning boss, the product positioning is more accurate, especially the alignment of the central axis position is improved, and the dimensional control accuracy is better when processing the other end of the product.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A cylinder multi-jaw chuck with a pre-positioning boss includes a cylinder multi-jaw chuck body, the cylinder multi-jaw chuck body includes a cylinder body and multiple telescopic jaws extending from the outer periphery of the cylinder body, the multiple telescopic jaws are used to clamp the outer periphery of the product, and the multiple telescopic jaws form a product clamping area around the front end face of the cylinder body.

[0009] The front end face of the cylinder is detachably provided with a pre-positioning boss, which is located at the center of the product clamping area and protrudes forward; the front end face of the pre-positioning boss serves as a pre-positioning end face, which is used to pre-position the rear end face of the product; a center positioning part is provided at the center of the front end face of the pre-positioning boss, which is used to pre-position the center of the rear end of the product; and the front ends of the pre-positioning boss and the center positioning part maintain a front-to-back distance from the clamping part of the telescopic gripper.

[0010] As a preferred embodiment, the central positioning part is a positioning protrusion protruding forward from the front end of the prepositioning protrusion.

[0011] As a preferred embodiment, the central positioning part is a positioning groove recessed from the front end of the prepositioning boss to the rear.

[0012] As a preferred embodiment, the front end face of the prepositioning boss is smaller than the area of ​​the product clamping area.

[0013] As a preferred embodiment, the front end of the cylinder body is provided with a central cavity, and a detachable circular plate is provided at the center of the front end face of the cylinder body. The front end of the cylinder body is provided with a connecting screw hole around the central cavity, and a first through hole is provided on the detachable circular plate. The first through hole corresponds to the connecting screw hole, and the diameter of the first through hole is greater than or equal to the diameter of the connecting screw hole.

[0014] As a preferred embodiment, the rear end of the prepositioning boss extends radially outward to form a mounting plate portion. The mounting plate portion is provided with a plurality of second through holes surrounding the prepositioning boss. The second through holes are corresponding to the first through holes and have the same diameter. A second screw is also provided, which passes through the second through holes and the first through holes in sequence and is threadedly locked into the connecting screw hole.

[0015] As a preferred embodiment, the front end of the cylinder body is provided with a central cavity, and the front end of the cylinder body is provided with a connecting screw hole around the central cavity; the rear end of the prepositioning boss extends radially outward to form a mounting plate portion, and the mounting plate portion is provided with a plurality of second through holes around the prepositioning boss, the second through holes being corresponding to the first through holes and having the same hole diameter and hole depth; a first screw is also provided, the first screw passing through the second through holes and being threaded and locked in the connecting screw hole.

[0016] As a preferred embodiment, the rear end of the prepositioning boss is provided with an extended protrusion along the axial direction, the extended protrusion is correspondingly provided with the prepositioning boss, and the extended protrusion extends into the central cavity; the central positioning part is a positioning groove that is recessed from the front end of the prepositioning boss to the interior of the extended protrusion.

[0017] As a preferred embodiment, the telescopic gripper includes an axial extension and a radial extension. The axial extension protrudes from the outer periphery of the cylinder body. The outer end of the radial extension is connected to the front end of the axial extension. The inner end of the radial extension is disposed toward the prepositioning boss. A shape-changing piece is detachably connected to the front end of the radial extension. The inner end of the shape-changing piece extends inward beyond the inner end of the radial extension.

[0018] As a preferred embodiment, the cylinder body is a cylindrical cylinder body, and three telescopic grippers are provided, which are evenly spaced along the outer periphery of the cylinder body.

[0019] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly improves product positioning accuracy, especially the alignment of the central axis, through the setting of the pre-positioning protrusion, resulting in better dimensional control precision when processing the other end of the product. Furthermore, the previously unused space at the center of the cylinder's front end face is cleverly utilized, without increasing the cylinder's volume due to the pre-positioning protrusion; it is essentially installed on the original cylinder. The pre-positioning protrusion is detachably mounted on the front end face of the cylinder, facilitating redesign.

[0020] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a perspective view of a cylinder multi-jaw chuck with a pre-positioning boss, according to one embodiment of the present invention.

[0022] Figure 2 This is an exploded view of a cylinder multi-jaw chuck with a pre-positioning boss, according to an embodiment of the present invention.

[0023] Figure 3 This is another exploded view of a cylinder multi-jaw chuck with a pre-positioning boss, which is an embodiment of the present invention.

[0024] Figure 4 This is an exploded view of a cylinder multi-jaw chuck with a pre-positioning boss, according to Embodiment 2 of this utility model.

[0025] Figure 5 This is a diagram illustrating the state of a product being held by a multi-jaw chuck with a pre-positioning boss, as described in Embodiment 1 of this utility model. Detailed Implementation

[0026] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0027] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0028] A multi-jaw chuck with a pre-positioning boss includes a multi-jaw chuck body. The multi-jaw chuck body includes a cylinder body 10 and multiple telescopic jaws 20 extending from the outer periphery of the cylinder body 10. The multiple telescopic jaws 20 are used to clamp the outer periphery of a product, and the multiple telescopic jaws 20 form a product clamping area around the front end face 11 of the cylinder body 10. The multiple telescopic jaws 20 are radially displaced at the front end face 11 of the cylinder body 10 under the drive of the cylinder body 10 to achieve clamping and releasing. In this first embodiment, the cylinder body 10 is a cylindrical cylinder body 10, and three telescopic jaws 20 are provided, which are evenly spaced along the outer periphery of the cylinder body 10, that is, the included angle between adjacent telescopic jaws 20 is 120 degrees.

[0029] The front end face of the cylinder body 10 is provided with a pre-positioning boss 30, which is located at the center of the product clamping area and protrudes forward; the front end face of the pre-positioning boss 30 serves as a pre-positioning end face 32, which is used to pre-position the rear end face of the product; a center positioning part 321 is provided at the center of the front end face of the pre-positioning boss 30, which is used to pre-position the rear center of the product; and the front ends of the pre-positioning boss 30 and the center positioning part maintain a front-to-back distance from the clamping part of the telescopic gripper 20.

[0030] The central positioning part is a positioning protrusion extending forward from the front end of the pre-positioning protrusion 30. Alternatively, the central positioning part is a positioning groove recessed backward from the front end of the pre-positioning protrusion 30. The design can be selected according to the product requiring pre-positioning.

[0031] In use, multiple telescopic grippers 20 are in the open state, placing the product on the pre-positioning boss 30. The rear end face of the product 40 is positioned by the front end face of the pre-positioning boss 30, and the center hole at the rear end of the product fits into the positioning protrusion (e.g., Figure 2 On the center positioning part 321 shown, the rear end face and center position of the product are pre-positioned, and then the telescopic gripper 20 clamps the outer periphery of the product radially inward.

[0032] The aforementioned multi-jaw chuck with a pre-positioning boss 30 is ingenious and practical. It integrates the pre-positioning function into the standard cylinder jaw structure, significantly improving positioning accuracy and ease of operation, thus enhancing machining precision while making full use of existing space. Specifically:

[0033] 1. The pre-positioning boss 30 ensures that the center hole of the product (usually a key reference) is aligned with the theoretical center axis of the clamping mechanism before clamping, avoiding the initial positional deviation (especially center deviation) that may occur when the product is clamped by the jaws alone. This provides a more accurate and stable reference for subsequent machining operations (such as drilling, turning, inspection, etc.) on the other end of the product, directly improving dimensional control accuracy and product consistency.

[0034] 2. It features efficient and ingenious space utilization, using the previously unused space in the center area of ​​the standard cylinder drive end face (usually a flat area used for installing end caps or internal structures) to install the pre-positioning boss 30. The pre-positioning function is achieved without increasing the overall external dimensions of the cylinder body, which is crucial for space-constrained automated equipment.

[0035] 3. Operators or robots can easily align the product's center hole with the protruding post, achieving fast and reliable pre-positioning, reducing alignment difficulty, and improving loading speed and consistency. Pre-positioning prevents the product from sliding or tilting during clamping, making clamping more stable.

[0036] 4. The pre-positioning function is integrated into the standard gripper cylinder as an optional and easily replaceable module, which facilitates quick model changeover. When products with different center hole sizes need to be clamped, only the corresponding pre-positioning boss 30 needs to be replaced, without replacing the entire clamping unit, saving time and costs.

[0037] Typically, the front end face of the prepositioning boss 30 is smaller than the area of ​​the product clamping area. A central cavity 14 is provided inside the front end of the cylinder body 10. A detachable circular plate 13 is provided at the center of the front end face of the cylinder body 10. A connecting screw hole 12 is provided around the central cavity at the front end of the cylinder body 10. A first through hole is provided on the detachable circular plate 13, corresponding to the connecting screw hole 12, and the diameter of the first through hole is greater than or equal to the diameter of the connecting screw hole. In the original state, a first screw passes through the first through hole and is threaded into the connecting screw hole 12. The rear end of the prepositioning boss 30 extends radially outward to form a mounting plate portion 31. The mounting plate portion 31 is provided with a plurality of second through holes 311 surrounding the prepositioning boss 30. The second through holes 311 are corresponding to the first through holes and have the same diameter. A second screw is also provided. The second screw is longer than the original first screw. The second screw passes through the second through hole 311 and the first through hole in sequence and is threaded and locked in the connecting screw hole 12.

[0038] Furthermore, the telescopic jaw 20 includes an axial extension and a radial extension 22. The axial extension protrudes from the outer periphery of the cylinder body 10. The outer end of the radial extension 22 is connected to the front end of the axial extension. The inner end of the radial extension 22 faces the pre-positioning boss 30. A shape-changing plate 21 is detachably connected to the front end of the radial extension 22. The inner end of the shape-changing plate 21 extends inward beyond the inner end of the radial extension 22, allowing the inner ends of multiple shape-changing plates 21 to clamp products with smaller outer diameters. Thus, a single telescopic stroke of a cylinder multi-jaw chuck can meet the clamping requirements of products with smaller outer diameters by changing different shape-changing plates. The radial extension 22 or the shape-changing plate 21 is a component directly used for clamping the product and is typically made of wear-resistant material to ensure clamping stability and durability.

[0039] In Embodiment 2, a central cavity 14 is provided inside the front end of the cylinder body 10, and a connecting screw hole 12 is provided around the central cavity 14 at the front end of the cylinder body 10; the rear end of the pre-positioning boss 30 extends radially outward to form a mounting plate portion, and a plurality of second through holes 311 are provided around the pre-positioning boss 30 on the mounting plate portion. The second through holes 311 correspond to the first through holes and have the same diameter and depth; a first screw is also provided, which is the original screw. The first screw passes through the second through holes and is threaded and locked into the connecting screw hole. During assembly, the original detachable circular plate 13 of the cylinder needs to be removed.

[0040] Furthermore, the overall structure of the prepositioning boss 30" module is slightly different; the rear end of the prepositioning boss 30 is provided with an extended protrusion along the axial direction, the extended protrusion is correspondingly arranged with the prepositioning boss 30, and the extended protrusion extends into the central cavity 14; the central positioning part is a positioning groove 33' recessed from the front end of the prepositioning boss 30 to the inside of the extended protrusion. In this way, by removing the original detachable circular plate 13, the position of the positioning groove 33' can be further recessed inward, further tapping the utilization potential of the internal space of the cylinder, making better use of the internal space of the cylinder body 10, and optimizing the overall layout.

[0041] The key design feature of this invention lies in its improved product positioning through the pre-positioning protrusion, particularly enhancing the alignment of the central axis and resulting in better dimensional control during subsequent machining of the other end of the product. Furthermore, the previously unused space at the center of the front face of the cylinder body 10 is cleverly utilized, without increasing the volume of the cylinder body 10 due to the pre-positioning protrusion 30; it is essentially integrated into the original cylinder body 10. The pre-positioning protrusion 30 is detachably mounted on the front end face of the cylinder body 10, facilitating model changes. This improved solution based on a standard cylinder gripper is widely applicable to automated assembly, inspection, and machining scenarios requiring high-precision positioning and clamping of parts with central holes or central protrusions, representing an optimal solution for improving equipment performance and product consistency.

[0042] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A multi-jaw chuck for cylinders with a pre-positioning boss, comprising a multi-jaw chuck body, the multi-jaw chuck body including a cylinder body and a plurality of telescopic jaws extending from the outer periphery of the cylinder body, the plurality of telescopic jaws being used to clamp the outer periphery of a product, the plurality of telescopic jaws forming a product clamping area around the front end face of the cylinder body, characterized in that: The front end face of the cylinder is detachably provided with a pre-positioning boss, which is located at the center of the product clamping area and protrudes forward; the front end face of the pre-positioning boss serves as a pre-positioning end face, which is used to pre-position the rear end face of the product; a center positioning part is provided at the center of the front end face of the pre-positioning boss, which is used to pre-position the center of the rear end of the product; and the front ends of the pre-positioning boss and the center positioning part maintain a front-to-back distance from the clamping part of the telescopic gripper.

2. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 1, characterized in that: The central positioning part is a positioning protrusion that protrudes forward from the front end of the prepositioning protrusion.

3. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 1, characterized in that: The central positioning part is a positioning groove recessed from the front end of the prepositioning boss to the rear.

4. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 1, characterized in that: The front end face of the prepositioning boss is smaller than the area of ​​the product clamping area.

5. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 1, characterized in that: The front end of the cylinder body has a central cavity, and a detachable circular plate is provided at the center of the front end face of the cylinder body. The front end of the cylinder body has a connecting screw hole around the central cavity. The detachable circular plate has a first through hole, which corresponds to the connecting screw hole, and the diameter of the first through hole is greater than or equal to the diameter of the connecting screw hole.

6. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 5, characterized in that: The rear end of the prepositioning boss extends radially outward to form a mounting plate portion. The mounting plate portion is provided with a plurality of second through holes surrounding the prepositioning boss. The second through holes are corresponding to the first through holes and have the same diameter. A second screw is also provided. The second screw passes through the second through holes and the first through holes in sequence and is threadedly locked in the connecting screw hole.

7. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 5, characterized in that: The front end of the cylinder body has a central cavity, and the front end of the cylinder body has a connecting screw hole around the central cavity; the rear end of the prepositioning boss extends radially outward to form a mounting plate, and the mounting plate has a plurality of second through holes around the prepositioning boss, the second through holes being corresponding to the first through holes and having the same diameter and depth; a first screw is also provided, the first screw passing through the second through holes and being threaded into the connecting screw hole.

8. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 7, characterized in that: The rear end of the prepositioning boss is provided with an extended protrusion along the axial direction. The extended protrusion is correspondingly provided with the prepositioning boss and extends into the central cavity. The central positioning part is a positioning groove that is recessed from the front end of the prepositioning boss to the inside of the extended protrusion.

9. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 1, characterized in that: The telescopic gripper includes an axial extension and a radial extension. The axial extension protrudes from the outer periphery of the cylinder body. The outer end of the radial extension is connected to the front end of the axial extension. The inner end of the radial extension is disposed toward the prepositioning boss. A shape-changing piece is detachably connected to the front end of the radial extension. The inner end of the shape-changing piece extends inward beyond the inner end of the radial extension.

10. The multi-jaw chuck for cylinders with a pre-positioning boss as described in claim 1, characterized in that: The cylinder body is a cylindrical cylinder body, and three telescopic grippers are provided, which are evenly spaced along the outer periphery of the cylinder body.

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