Clamping mechanism for clamp and clamp

Abstract

The utility model belongs to the field of clamps, and provides a clamping mechanism for a clamp and the clamp, the clamping mechanism comprises a grabbing and clamping piece and a driving piece, the driving piece axially moves to drive the grabbing and clamping piece to axially contract inwards so as to axially restrain a workpiece to be machined; and the boss is connected with the workpiece to be machined, and a long groove is formed in the middle of the boss and used for fixing circular motion in the radial direction of the workpiece to be machined. Compared with the prior art, the clamping mechanism for the clamp and the clamp have the advantage that aiming at the current situation of the prior art, the clamping mechanism for the clamp and the clamp which are used for machining the upper surface of the to-be-machined part at high precision are provided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of fixture, concretely relates to a clamping mechanism and fixture for fixture. BACKGROUND

[0002] In the current market, there are various clamping mechanisms and fixtures for fixture, these mechanisms generally adopt two-end clamping in the vertical direction to ensure that the workpiece is kept fixed in the vertical direction, prevent displacement or shaking due to stress, and ensure machining precision. However, for products that need to process the upper surface of the workpiece and have high machining precision requirements, the clamping mechanisms on the market generally adopt axial direction two-end pressing or radial direction clamping, and during machining, part of the upper surface of the workpiece is in a clamped state, which cannot be machined in one time, has obvious defects, and needs to be clamped and machined for two or more times, which has certain requirements for the structure and layout of the equipment, increases the machining time and instability. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem in the prior art, and provides a clamping mechanism and fixture for fixture for machining the upper surface of a workpiece with high precision.

[0004] In order to solve the above problems, the utility model adopts the technical scheme of a clamping mechanism for fixture, which comprises:

[0005] The driving member and the grabbing member are connected in contact, the grabbing member is provided with a long groove, the long groove provides a deformation space when the grabbing member is contracted, and the end of the workpiece close to the grabbing member is placed in the long groove, the deformable end of the grabbing member in the axial direction is connected with the driving member, the driving member moves in the axial direction, drives the deformable end of the grabbing member to contract in the axial direction, and thus provides the workpiece with a constraint force in the axial direction.

[0006] In the clamping mechanism for fixture, the grabbing member is trumpet-shaped, the center size gradually increases along the axial direction from one end away from the connection between the driving member and the grabbing member to the other end close to the connection between the driving member and the grabbing member.

[0007] In the clamping mechanism for fixture, the driving member is provided with a waist-shaped hole in the side wall along the radial direction, the waist-shaped hole is connected with a positioning pin, and the positioning pin is connected with the grabbing member by a fastener through the waist-shaped hole.

[0008] In the clamping mechanism for fixture, the driving member is connected with a driving column at the lower end, and the driving column provides a force in the axial direction to drive the driving member to move in the axial direction.

[0009] The utility model also comprises a fixture, which comprises:

[0010] The outer shell and the protective shell are provided. One end of the outer shell in the axial direction is connected to one end of the workpiece to be processed, which rests on the gripping mechanism. The other end of the outer shell is connected to the protective shell by fasteners.

[0011] The protective shell is connected to the connecting platform;

[0012] The shaft is connected to the protective shell via a connecting platform using fasteners.

[0013] A moving block, wherein the moving block has a through hole in the axial direction, and the through hole is connected to a guide tube;

[0014] Clamping mechanism.

[0015] In the above-mentioned fixture, a boss is provided at the connection between the outer shell and the workpiece to be processed. The number of bosses is three or more, and the end faces of the bosses near the workpiece to be processed are located on the same plane in the radial direction.

[0016] In the above-mentioned fixture, the shaft is connected to a connecting part, the number of connecting parts is two or more, and the other end of the shaft away from the connecting platform is reserved with a connecting hole.

[0017] In the above-mentioned fixture, the boss end face is provided with air holes and gas channels. The gas channels are located at the outer shell and the protective sleeve, and corresponding air holes are provided at the conduit.

[0018] In the aforementioned fixture, the conduit is also provided with a sealing ring, which is located on the protective shell in the direction of the gas channel connected to the conduit and close to the connection platform.

[0019] In the aforementioned fixture, the support platform is embedded between the protective shell and the shaft, creating a gap between the drive column and the shaft.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] (1) During the operation, the drive unit drives the gripper to move axially. The gripper retracts radially inward, providing a constraint force on the workpiece in the axial direction. The connection between the boss and the workpiece is constrained radially by a long groove to prevent the workpiece from moving in the radial direction. This ensures that the upper surface of the workpiece is unobstructed, making it convenient to perform one-way processing on the upper surface of the workpiece.

[0022] (2) The gripper is trumpet-shaped and has a long groove. The center dimension of the gripper gradually increases along the axial direction, which improves the convenience of axial shrinkage deformation of the gripper.

[0023] (3) A waist-shaped hole is provided on the radial side wall of the drive component. A positioning pin is connected to the waist-shaped hole. The positioning pin is connected to the gripper through the waist-shaped hole using fasteners. The axial movement distance of the drive component at the start and end of the operation is limited by the waist-shaped hole, which increases the safety during operation.

[0024] (4) Bolts are provided above the drive block in the axial direction. There are three or more bolts. The bolts are fixedly connected to the drive component. When the drive block moves, it moves equidistantly with the drive component, which can effectively improve the working efficiency of the clamping mechanism.

[0025] (5) There are three or more bosses, and the bosses are kept on the same plane in the horizontal direction. The center of the boss is provided with air hole and corresponding channel. Place the workpiece on the boss. During the start of the work, place the workpiece on the corresponding groove on the clamping part. The sound of airflow can be used to more accurately judge the horizontal balance of the workpiece.

[0026] (6) The protective shell and the outer shell are connected by fasteners in the axial direction. The protective shell adopts an integrated design and can be used for the installation and fixation of the carrier bearing clamping mechanism to improve the processing accuracy and processing strength of the clamping mechanism.

[0027] (7) The connecting platform is embedded in the protective shell near the shaft and is connected to the protective shell with fasteners. The other end of the connecting platform is connected to the shaft with fasteners, providing a certain amount of space for the axial movement of the drive block and facilitating the axial movement of the drive block. Attached Figure Description

[0028] Figure 1 This is a two-dimensional drawing of a clamp in this utility model example.

[0029] Figure 2 This is an exploded view of a clamping mechanism in this utility model.

[0030] Figure 3 This is a cross-sectional view of a clamp in this utility model example.

[0031] Figure 4 This is a front view of a clamp in this utility model example.

[0032] In the diagram, 1. Workpiece to be processed; 2. Outer shell; 3. Protective shell; 4. Shaft; 5. Connecting part; 6. Air hole; 7. Boss; 8. Gripping part; 9. Long groove; 10. Connecting platform; 11. Moving block; 12. Positioning pin; 13. Waist-shaped hole; 14. Sealing ring; 15. Gas passage; 16. Conduit; 17. Drive block; 18. Drive component. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] like Figure 2 As shown, this utility model provides a clamping mechanism for a clamp, comprising:

[0036] The device comprises a drive member 18 and a gripper 8. The gripper 8 is adapted to be in contact with the drive member 18. The gripper 8 has an elongated groove 9, which provides deformation space when the gripper 8 retracts. The protruding end of the workpiece 1 near the gripper 8 is placed in the elongated groove 9. During processing, it provides radial constraint force to the workpiece 1. The deformable end of the gripper 8 in the axial direction is connected to the drive member 18. The drive member 18 moves in the axial direction, causing the deformable end of the gripper 8 to retract inward in the axial direction, thereby providing axial constraint force to the workpiece 1.

[0037] In this embodiment, the gripper 8 and the drive member 18 are connected by contact. When the clamping mechanism starts to work, the axial movement of the drive member 18 compresses the gripper 8 to contract axially inward, thereby generating an axial constraint force on the workpiece 1. The part of the gripper 8 connected to the workpiece 1 has an elastic deformation function, which better provides an axial constraint force on the workpiece 1, so that the upper surface of the workpiece can be directly processed without secondary clamping, providing more convenient processing conditions for the upper surface of the workpiece 1.

[0038] In this embodiment, the gripper 8 is provided with a long groove 9. The long groove 9 is located on the end face of the gripper 8 near the boss 7 and extends along the axial direction to the other end of the gripper 8. The radial dimension of the long groove 9 matches the dimension of the end of the workpiece 1 connected to the clamping mechanism, which is beneficial for the workpiece 1 to be better installed on the gripper 8 and radially constrained, preventing circumferential rotation during processing.

[0039] In this embodiment, the gripper 8 has a trumpet-shaped structure, with its center dimension gradually increasing along the axial direction from one end near the connecting platform 10 to the other end away from the connecting platform 10. The center dimension of the end of the gripper 8 near the workpiece 1 is slightly larger than the dimension of the end of the workpiece 1 connected to the gripper 8, which facilitates the installation of the workpiece 1. At the same time, in the working state, the gripper 8 is affected by the axial movement of the driving member 18, and moves in the axial direction to retract inward, compressing the end of the workpiece 1 connected to the clamping mechanism radially inward, thus providing better axial constraint force for the workpiece 1.

[0040] In this embodiment, the drive component 18 has a housing 2 at one end away from the workpiece 1 in the axial direction, and a protective shell 3 at the other end of the housing 2 in the axial position. The protective shell 3 is connected to the housing 2 by fasteners. The protective shell 3 serves as a mounting base, with the internal space reserved for the position of the corresponding connecting parts, protecting the internal structure of the gripping mechanism and improving the overall aesthetics of the clamping mechanism.

[0041] like Figure 3 As shown, the clamp provided by this utility model also includes a positioning pin 12 and a waist-shaped hole 13. The radial side wall of the driving member 18 is provided with a waist-shaped hole 13, and the positioning pin 12 is connected to the waist-shaped hole 13. The positioning pin 12 is connected to the gripper 8 through the waist-shaped hole 13 by a fastener.

[0042] During operation, the drive block 17 drives the drive component 18 to move in the axial direction. The drive component 18 moves towards the workpiece 1 in the axial direction. The positioning pin 1 limits the drive component 18 in the axial direction. After the operation is completed, the drive component 18 moves downward to the positioning pin 12 to control the axial movement position.

[0043] In this embodiment, by connecting the clamping member 8 and the driving member 18 with the positioning pin 12, the distance the driving member 18 moves in the axial direction can be controlled, which helps to improve the safety of the clamping mechanism during the processing.

[0044] In this embodiment, a driving block 17 is provided at the end of the driving member 18 away from the gripper 8 in the axial direction. The driving block 17 is located inside the protective shell 3 and has a through hole in the middle. The driving block 17 is threadedly connected to the moving block 11 in the axial direction, and the driving block 17 is fixedly connected to the driving member 18 by bolts. The number of bolts is three or more. During the operation, the driving block 17 and the driving member 18 move simultaneously, which can effectively improve the timeliness of force transmission in the axial direction of the clamp.

[0045] In this embodiment, the moving block 11 has a through hole in the axial direction, and the through hole is connected to the conduit 16. The conduit 16 has a hole in the radial direction connected to the gas channel 15. During the processing, the gas is connected to the air pressure mechanism from the other end of the conduit with the hole, and the gas flows out from there and enters the gas channel through the hole on the conduit, thereby realizing the continuity of the gas channel.

[0046] In this embodiment, a sealing ring 14 is provided at the end of the conduit 16 that is axially away from the workpiece 1 to which the gas channel 15 is connected, in order to prevent the gas flowing in from the conduit 16 during the processing from overflowing from the gap, thereby effectively improving the utilization rate of the gas.

[0047] like Figure 4 As shown, the end of the gripping mechanism of this utility model connected to the workpiece 1 is also provided with a boss 7, and the end face of the boss 7 is also provided with an air hole 6.

[0048] In this embodiment, the side of the workpiece 1 to be processed is also provided with a boss 7. There are three bosses 7, and the end faces of the bosses 7 are located on the same plane in the radial direction. The upper surface of the horizontal surface of the bosses 7 is provided with an air hole 6.

[0049] Preferably, the location of the air hole 6 on the boss 7 is in the outer shell 2 area corresponding to the long groove 9 in the gripper 8. This facilitates the control of the workpiece 1 on the same plane during installation and placement. At the same time, before the workpiece 1 is installed, gas flows out from the air hole 6 at the boss 7, which can clean up the debris that may have been left in the previous processing of the boss 7 and the surrounding area to a certain extent before processing. This ensures the flatness of the end face of the boss 7 when it is connected to the workpiece 1 and also improves the stability of the workpiece 1 after installation.

[0050] In this embodiment, the outer shell 2 and the protective shell 3 are provided with a gas channel 15 that communicates with the air hole 6 on the end face of the boss 7. The other end of the gas channel 15 is connected to the hole opened in the radial direction of the conduit 16, so as to realize the flow of gas in the fixture during the processing.

[0051] Preferably, during the manufacturing process of the outer shell 2 and the protective shell 3, the gas channel 15 is connected to the outer shell 2 and the protective shell 3 by forming machining holes in the axial direction of the outer shell 2 and the protective shell 3, and forming machining holes in the radial direction at the positions of the gas channel 15 corresponding to the axial direction of the outer shell 2 and the protective shell 3. During the processing of the workpiece, the machining holes in the radial direction are blocked with components to ensure that the gas flows out from the air hole 6 on the boss 7 only through the gas channel 15.

[0052] Furthermore, in order to reduce the number of steps in the process, the outer shell 2 and the protective shell 3 can be batch-processed by 3D printing. Pre-designing the gas channel for integrated printing can reduce the number of processing holes and improve the efficiency of gas flow in the gas channel 15.

[0053] like Figure 1 The clamp shown also includes:

[0054] Shaft 4, which is connected to the protective shell 3 via a connecting platform 10 using fasteners;

[0055] Clamping mechanism.

[0056] In this embodiment, the end of the protective shell 3 away from the workpiece 1 in the axial direction is also provided with a connecting platform 10. The protective shell 3 and the shaft 4 are connected on the connecting platform 10. Using the connecting platform 10 as a transition part can effectively improve the strength of the connection and facilitate the connection between the clamping mechanism and the shaft 4. While the connecting platform 10 is embedded in the protective shell 3, the end of the protective shell 3 near the shaft 4 is slightly higher than the upper end of the shaft 4 near the protective shell 3, providing a certain amount of movement space for the axial movement of the drive block 17 inside the protective shell 3.

[0057] In this embodiment, the shaft 4 is provided with a connecting part 5, and the number of connecting parts 5 is two or more. The connecting parts 5 are connected to external components and provide assembly and positioning functions for the fixture.

[0058] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A clamping mechanism for a fixture, characterized in that, include: The device includes a drive unit and a gripper. The gripper is adapted to be in contact with the drive unit. The gripper has an elongated groove that provides deformation space when it retracts. The protruding end of the workpiece near the gripper is placed in the elongated groove. The deformable end of the gripper in the axial direction is connected to the drive unit. The drive unit moves in the axial direction, causing the deformable end of the gripper to retract inward in the axial direction, thereby providing an axial constraint force for the workpiece.

2. The clamping mechanism according to claim 1, characterized in that, The gripper is trumpet-shaped, with its center dimension gradually increasing axially from one end away from the connection between the drive member and the gripper to the other end near the connection between the drive member and the gripper.

3. The clamping mechanism according to claim 1, characterized in that, The drive component has a waist-shaped hole on its radial sidewall, and a positioning pin is connected to the waist-shaped hole. The positioning pin is connected to the gripper through the waist-shaped hole using a fastener.

4. The clamping mechanism according to claim 1, characterized in that, The lower end of the driving component is connected to a driving block, which provides an axial force to drive the driving component to move axially.

5. A clamp, characterized in that, include: The clamping mechanism as described in claim 4; The outer shell and the protective shell are provided. One end of the outer shell in the axial direction is connected to one end of the workpiece to be processed, which is placed in the clamping mechanism. The other end of the outer shell is connected to the protective shell by fasteners. The protective shell is connected to the connecting platform; The shaft is connected to the protective shell via a connecting platform using fasteners. The moving block has a through hole in the axial direction, and the through hole is connected to a conduit.

6. The clamp according to claim 5, characterized in that, The outer shell is provided with a boss at the connection between it and the workpiece to be processed. The number of bosses is three or more, and the end faces of the bosses are on the same plane in the radial direction.

7. The clamp according to claim 5, characterized in that, The shaft is provided with a connection point, and the end of the connection point away from the clamping mechanism is provided with a connection hole.

8. The clamp according to claim 6, characterized in that, The boss end face is provided with air holes and gas channels. The gas channels are located at the outer shell and protective sleeve, and there are corresponding air holes at the conduit.

9. The clamp according to claim 5, characterized in that, The conduit is also equipped with a sealing ring, which is located on the protective shell in the direction where the gas channel connects to the conduit and is close to the connection platform.

10. The clamp according to claim 5, characterized in that, The connecting platform is embedded between the protective shell and the shaft, creating a gap between the drive block and the shaft.

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