A precisely positionable clamping sleeve

Abstract

The utility model discloses a kind of clamping sleeve clamps of accurate positioning, belong to machining fixture technical field, to solve the problem of inaccuracy of positioning caused by workpiece axial displacement when clamping. Its technical scheme includes: bottom plate and clamping mechanism. Clamping block is axially fixed on bottom plate by fixed column, and push sleeve is slidably arranged on the outer periphery of clamping block. The inner wall of push sleeve is provided with an inner tapered surface matched with the groove of clamping block. By pulling the pull column connected with the push sleeve, the push sleeve axially slides, and the axial force can be converted into the radial clamping force of the axially fixed clamping block. The utility model completely eliminates the axial movement of the workpiece during clamping through the axial fixation design of clamping block, significantly improves the positioning accuracy of the workpiece, and the structure is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a clamping sleeve that can be precisely positioned. Background Technology

[0002] Clamping sleeves are a type of tooling fixture widely used in machining, automated assembly, and precision measurement. Their main function is to quickly and stably position and clamp workpieces. Among common clamping sleeves, pull-type clamping sleeves are widely used due to their simple structure and high clamping force.

[0003] Traditional pull-type clamping sleeves typically work by having a clamping body with a tapered outer surface move backward along a fixed tapered inner hole when subjected to axial tension. During this axial movement, the interaction force between the tapered surfaces forces the clamping body to contract radially, thereby clamping the workpiece.

[0004] However, the above structure has an inherent drawback. Because the clamping body itself needs to move axially during clamping, this movement is inevitably transmitted to the workpiece through friction between the clamping body and the workpiece, causing the workpiece to also experience axial displacement. In machining or inspection applications where high precision is required for the axial dimensions or position of the workpiece, this axial movement during clamping can disrupt the workpiece's pre-set reference position, leading to positioning failure and severely affecting the final accuracy of the product.

[0005] Therefore, this utility model proposes a clamping sleeve that can be precisely positioned to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a clamping sleeve that can be precisely positioned, aiming to improve the problem that the existing pull-type clamping sleeve causes the workpiece to shift due to the axial movement of the clamping components during the clamping process, resulting in the loss of axial positioning accuracy of the workpiece.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a clamping sleeve that can be precisely positioned, comprising: a base plate and a clamping mechanism disposed on the base plate; the clamping mechanism includes a clamping block and a fixing post; and a push sleeve, a pull post, a connecting post and a round block.

[0008] The inner wall of the push sleeve is provided with an inner conical surface, and the outer periphery of the clamping block is provided with a groove that mates with the inner conical surface.

[0009] Furthermore, the fixing column axially fixes the clamping block to the base plate, the push sleeve is slidably fitted around the outer periphery of the clamping block, the connecting column is slidably inserted inside the fixing column, the upper end of the connecting column is fixedly connected to the pull column, the lower end of the connecting column is fixedly connected to the round block, and the pull column is fixedly connected to the push sleeve.

[0010] Preferably, the upper half of the clamping block is cut into at least two separate clamping segments.

[0011] Preferably, the precisely positioned clamping sleeve further includes a fixing mechanism, which includes a fixing plate and bolts. The fixing plate is fixedly connected to the bottom of the base plate by the bolts and limits and fixes the lower end of the fixing column.

[0012] Preferably, the clamping mechanism further includes a pin that passes through the pull post and is fixedly connected to the push sleeve.

[0013] Preferably, the groove on the clamping block is an outer conical surface surrounding the outer periphery of the clamping block.

[0014] Preferably, the clamping mechanism further includes a sleeve, which is fixedly disposed on the base plate, and the push sleeve is slidably disposed inside the sleeve.

[0015] Preferably, as a specific embodiment, the precisely positionable clamping sleeve further includes a handle, which is fixedly connected to the outer wall of the clamping sleeve.

[0016] Preferably, the cross-section of the tie rod is rectangular.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting an axially fixed clamping block and adding an independently sliding push sleeve, utilizes the inner conical surface of the push sleeve and the groove of the clamping block to convert the axial tension into a pure radial clamping force, solving the problem in the prior art that the clamping component will generate axial displacement during clamping, thereby compromising the workpiece positioning accuracy. It achieves the technical effect of keeping the axial position of the workpiece unchanged during the clamping process and realizing high-precision positioning.

[0018] 2. This utility model solves the problem of loosening or instability of the core clamping component when subjected to huge clamping force by using a fixed column to fix the clamping block to the base plate and adding a fixed plate to reinforce and limit the fixed column. This achieves the technical effect of a stable and reliable overall structure that can withstand large loads, ensuring the repeatability and consistency of clamping actions and extending the service life of the equipment. Attached Figure Description

[0019] Figure 1This is a perspective view of a clamping sleeve that can be precisely positioned according to the present invention. Figure 2 This is a schematic diagram of the fixing mechanism of a clamping sleeve that can be precisely positioned according to the present invention. Figure 3 This is a schematic diagram of the clamping mechanism of a clamping sleeve that can be precisely positioned according to the present invention. Figure 4 for Figure 3 A schematic diagram of the structure at point A in the middle.

[0020] Legend: 1. Fixing mechanism; 101. Base plate; 102. Fixing plate; 103. Bolt; 2. Clamping mechanism; 201. Clip; 202. Clamping block; 203. Pull column; 204. Pin; 205. Groove; 206. Fixing column; 207. Connecting column; 208. Round block; 3. Handle. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-4 The present invention provides an embodiment of a clamping sleeve that can be precisely positioned, comprising a fixing mechanism 1 and a clamping mechanism 2 disposed on the fixing mechanism 1. The fixing mechanism 1 serves as the mounting base for the entire device, and the clamping mechanism 2 is used to perform radial clamping and fixing of the workpiece. Specifically, the fixing mechanism 1 includes a base plate 101, and the clamping mechanism 2 includes a clamping block 202, a fixing column 206, a push sleeve, a pull column 203, a connecting column 207, and a round block 208. The clamping block 202 is used to directly contact the workpiece. In order to keep the axial position of the clamping block 202 constant during the clamping process, the upper end of the fixing post 206 is fixedly connected to the bottom of the clamping block 202, and the fixing post 206 passes through the base plate 101. Through this structure, the clamping block 202 is axially fixed to the base plate 101. As the core driving component for radial clamping, the push sleeve is fitted onto the outer periphery of the clamping block 202 in a sliding fit manner, and the inner wall of the push sleeve is provided with an inner conical surface; corresponding to the inner conical surface of the push sleeve, the outer periphery of the clamping block 202 is provided with a groove 205, and the surface morphology of the groove 205 is an outer conical surface that matches the inner conical surface; In order to drive the push sleeve to slide axially, a transmission structure consisting of a circular block 208, a connecting column 207, and a pull column 203 is provided. The connecting column 207 is slidably inserted inside the hollow fixed column 206. The lower end of the connecting column 207 is fixedly connected to the circular block 208, which serves as the operating end, and the upper end of the connecting column 207 is fixedly connected to the pull column 203. The pull column 203 is fixedly connected to the push sleeve. When the circular block 208 is pulled down, the pulling force is transmitted to the pull column 203 through the connecting column 207, which in turn drives the push sleeve, which is fixedly connected to the pull column 203, to slide down synchronously along the axial direction of the clamping block 202. During the sliding process, the inner conical surface of the push sleeve interferes with the groove 205 of the axially fixed clamping block 202, converting the axial sliding into a radial extrusion force on the clamping block 202, thereby causing the clamping block 202 to contract and clamp the workpiece. In order to achieve effective clamping of the workpiece, the upper part of the clamping block 202 is cut into at least two separate clamping petals. These clamping petals open outward in their natural state. When subjected to radial extrusion force from the push sleeve, they can contract towards the center to clamp the workpiece. When the extrusion force is released, the clamping petals return to the open state by their own elasticity, which facilitates the picking and putting away of the workpiece. To achieve a reliable fixed connection between the pull column 203 and the push sleeve, the clamping mechanism 2 also includes a pin 204, which passes through the pull column 203 and is fixedly connected to the push sleeve, thereby ensuring that the axial movement of the pull column 203 can be transmitted to the push sleeve without damage; in a preferred embodiment, the cross-section of the pull column 203 is rectangular, which can prevent unnecessary rotation of the pull column 203 when transmitting torque and ensure the smoothness of movement; To enhance the structural rigidity and installation stability of the entire device, the fixing mechanism 1 also includes a fixing plate 102 and bolts 103. The fixing plate 102 is located at the bottom of the base plate 101 and is fixedly connected to the base plate 101 by multiple bolts 103. In the assembled state, the fixing plate 102 abuts against and presses against the lower end of the fixing column 206, thereby firmly limiting and fixing the fixing column 206, ensuring that the clamping block 202 can maintain a stable axial position even when subjected to huge clamping force. In order to protect the internal moving parts and facilitate user operation, the clamping mechanism 2 also includes a clamp 201 and a handle 3. The clamp 201 is fixedly set on the base plate 101 to accommodate and protect the internal moving parts such as the push sleeve. The push sleeve slides inside the clamp 201. The handle 3 is fixedly connected to the outer wall of the clamp 201 to facilitate the user to move or assist in positioning the entire clamping sleeve. As a preferred embodiment, in order to achieve reliable axial fixation of the clamping block 202, the upper end of the fixing column 206 is fixedly connected to the bottom of the clamping block 202 by integral molding. This structure has the advantages of high strength and high coaxiality, and can effectively resist the overturning moment generated by the clamping force. As another preferred embodiment, in order to achieve a fixed connection between the connecting post 207 and the pull post 203, the upper end of the connecting post 207 is provided with an external thread, and the lower end of the pull post 203 is provided with an internal thread. The connecting post 207 and the pull post 203 are fixedly connected by thread engagement. This connection method is convenient for assembly and disassembly. In a preferred embodiment, in order to achieve a fixed connection between the connecting column 207 and the round block 208, the lower end of the connecting column 207 is fixedly connected to the round block 208 by welding, which ensures the reliable transmission of operating force. As a specific implementation method, in order to achieve a fixed connection between the pull post 203 and the push sleeve, a transverse through hole is provided on the pull post 203, and a corresponding pin hole is provided on the push sleeve. The pin 204 passes through the through hole of the pull post 203 and the pin hole of the push sleeve, and locks the two together. In a preferred embodiment, in order to achieve a fixed connection between the fixing plate 102 and the base plate 101, the bottom of the base plate 101 is provided with multiple threaded holes, and the fixing plate 102 is provided with multiple through holes. The bolt 103 passes through the through holes of the fixing plate 102 and is screwed into the threaded holes of the base plate 101, thereby fastening the fixing plate 102 to the bottom of the base plate 101. In a preferred embodiment, in order to fix the sleeve 201 on the base plate 101, a mounting hole is provided on the bottom flange of the sleeve 201, and the sleeve 201 is fixed to the upper surface of the base plate 101 by screws passing through the mounting hole.

[0023] Working principle: When it is necessary to clamp the workpiece, the operator pulls the round block 208 downward. The pulling force is transmitted through the connecting column 207, which is fixedly connected to the round block 208, to the pull column 203, which is fixedly connected to the upper end of the connecting column 207, thereby causing the push sleeve, which is fixedly connected to the pull column 203, to slide downward axially.

[0024] During this process, the clamping block 202 is axially fixed to the base plate 101 by the fixing post 206. Therefore, the clamping block 202 itself remains stationary in the axial position. As the push sleeve slides downward, the inner conical surface of the push sleeve slides into the groove 205 on the outer periphery of the clamping block 202 and interferes with it. This converts the axial tension of the push sleeve into a radial compressive force on the clamping petals of the clamping block 202. This radial compressive force forces the clamping petals to contract towards the center, thereby achieving reliable clamping of the workpiece.

[0025] Since the clamping block 202 does not undergo axial displacement during the entire clamping process, the clamped workpiece maintains its initial axial positioning accuracy. When it is necessary to release the workpiece, the circular block 208 is pushed upward, and the push sleeve slides upward under the action of the reverse force. The inner conical surface of the push sleeve gradually disengages from the groove 205 of the clamping block 202, and the radial extrusion force applied to the clamping petal disappears. The clamping petal recovers to its naturally open state by its own elasticity, thereby releasing the workpiece.

Claims

1. A clamping sleeve that can be precisely positioned, comprising a base plate (101) and a clamping mechanism (2) disposed on the base plate (101). The clamping mechanism (2) includes a clamping block (202) and a fixing post (206). The upper end of the fixing post (206) is fixedly connected to the bottom of the clamping block (202). The fixing post (206) passes through the base plate (101) to axially fix the clamping block (202) to the base plate (101). Its features are, The clamping mechanism (2) also includes a push sleeve, a pull column (203), a connecting column (207), and a round block (208); The push sleeve is slidably fitted onto the outer periphery of the clamping block (202), the inner wall of the push sleeve is provided with an inner conical surface, and the outer periphery of the clamping block (202) is provided with a groove (205) that mates with the inner conical surface. The connecting post (207) is slidably inserted inside the fixed post (206), the upper end of the connecting post (207) is fixedly connected to the pull post (203), and the lower end of the connecting post (207) is fixedly connected to the round block (208). The pull column (203) is fixedly connected to the push sleeve, so that when the circular block (208) is pulled, the push sleeve is driven to slide along the axial direction of the clamping block (202) through the connecting column (207) and the pull column (203), and the inner conical surface is engaged with the groove (205).

2. The precisely positionable clamping sleeve according to claim 1, characterized in that, The upper part of the clamping block (202) is cut into at least two separate clamping petals.

3. The precisely positionable clamping sleeve according to claim 1, characterized in that, The clamping sleeve also includes a fixing mechanism (1), which includes a fixing plate (102) and a bolt (103). The fixing plate (102) is fixedly connected to the bottom of the base plate (101) by the bolt (103) and limits and fixes the lower end of the fixing column (206).

4. The precisely positionable clamping sleeve according to claim 1, characterized in that, The clamping mechanism (2) also includes a pin (204) that passes through the pull post (203) and is fixedly connected to the push sleeve.

5. The precisely positionable clamping sleeve according to claim 1, characterized in that, The groove (205) is an outer conical surface surrounding the outer periphery of the clamping block (202).

6. The precisely positionable clamping sleeve according to claim 1, characterized in that, The clamping mechanism (2) further includes a sleeve (201), which is fixedly disposed on the base plate (101), and the push sleeve is slidably disposed inside the sleeve (201).

7. The precisely positionable clamping sleeve according to claim 6, characterized in that, The clamping sleeve also includes a handle (3), which is fixedly connected to the outer wall of the clamp (201).

8. The precisely positionable clamping sleeve according to claim 1, characterized in that, The cross-section of the tie rod (203) is rectangular.

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