A clamping device

Abstract

The utility model relates to machine tool parts positioning technical field, the utility model provides a clamping device, including locating sleeve, top and base, be provided with the shaft sleeve on the base, the shaft sleeve, base and locating sleeve inner wall enclose and form annular cavity, annular cavity is divided into upper chamber and lower chamber through piston disc, the side wall of locating sleeve is equipped with the air inlet that communicates with upper chamber, the base is equipped with the air hole that communicates with lower chamber, the first elastic member is limited between piston disc and base, the piston disc is connected with the action ring through the connecting rod, and the connecting rod sliding seal passes through the top of shaft sleeve, the movable clamp block for clamping positioning joint is horizontally limited sliding between the shaft sleeve and the top, the action groove that cooperates is equipped in movable clamp block, and the action ring and the action groove side wall abut for guiding movable clamp block radial sliding to clamp and loosen positioning joint, has reduced the cumbersome nature of mounting and clamping, and has reduced the labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of machine tool component positioning technology, and more specifically, to a clamping device. Background Technology

[0002] In the field of machine tool parts processing, precise positioning and efficient clamping are key to ensuring processing accuracy and production efficiency. Especially in automated production lines, the quick positioning and reliable clamping of workpieces by fixtures directly affect the cycle time and production efficiency of the production line.

[0003] Currently, traditional clamping devices mostly use mechanical locking, which relies on radial bolt fastening. This not only results in a cumbersome clamping process and slow response speed, but also makes it difficult to achieve automated and rapid changeover. Consequently, existing technologies suffer from low clamping efficiency and poor positioning reliability when facing the demands of high-efficiency and high-precision modern machining. Utility Model Content

[0004] The purpose of this invention is to provide a clamping device that solves the problems of low clamping efficiency and poor positioning reliability of existing clamping fixtures.

[0005] This utility model is achieved through the following technical solution: a clamping device, including a positioning sleeve, a top cover connected to the top of the positioning sleeve, a base sealed to the bottom of the positioning sleeve, a bushing provided on the base, the bushing, the base and the inner wall of the positioning sleeve forming an annular cavity, the annular cavity being divided into an upper cavity and a lower cavity by a piston disc, an air inlet communicating with the upper cavity being opened on the side wall of the positioning sleeve, an air outlet communicating with the lower cavity being opened on the base, a first elastic element limiting the piston disc and the base, an action ring being connected to the piston disc by a connecting rod, the connecting rod slidingly and sealingly passing through the top of the bushing, a movable clamping block for clamping the positioning joint being horizontally limited and slidable between the bushing and the top cover, an action groove cooperating with the action ring being opened in the movable clamping block, the action ring abutting against the side wall of the action groove to guide the movable clamping block to slide radially to clamp and release the positioning joint.

[0006] Furthermore, the action groove is tapered, wider at the top and narrower at the bottom, and has a guide groove for guiding the sliding of the connecting rod.

[0007] Furthermore, a second elastic element is coaxially arranged inside the bushing. One end of the second elastic element is detachably connected to the bottom of the bushing, and the other end of the second elastic element is connected to a stop plate that contacts the positioning joint.

[0008] Furthermore, the movable clamping block consists of at least a sector-shaped structure that is evenly divided into three parts along the circumference.

[0009] Furthermore, the bushing includes a cylindrical body, with a support plate horizontally supported at the upper end of the cylindrical body and sealed to the inner wall of the positioning sleeve, and a positioning plate connected to the lower end of the cylindrical body and engaging with the base.

[0010] Furthermore, a first sealing ring is provided on the inner side of the piston disc to contact the outer wall of the bushing, and a second sealing ring is provided on the outer side of the piston disc to contact the inner wall of the positioning sleeve.

[0011] Furthermore, the positioning sleeve is threadedly connected to the base, and a third sealing ring is provided between the positioning sleeve and the base.

[0012] Furthermore, the positioning sleeve is fastened to the top cover step by bolts.

[0013] This utility model has at least the following advantages and beneficial effects: Compressed air is introduced through the air inlet to drive the piston disc to move downward. The connecting rod on the piston disc drives the action ring to move vertically downward and abut against the inner wall of the action groove, converting the vertical force into a radial force to drive the movable clamping block to open radially in all directions. After the positioning joint is placed in place, the air inlet stops supplying air. Under the elastic restoring force of the first elastic element, the piston disc pushes upward, driving the movable clamping block to clamp the positioning joint, thereby achieving the positioning and locking of the positioning joint, reducing the cumbersomeness of clamping and reducing labor intensity. Attached Figure Description

[0014] Figure 1 A cross-sectional view of a clamping device provided by this utility model.

[0015] Figure 2 This is a bottom view of the clamping device provided by this utility model, showing the movable clamping block and the actuating ring in a clamped state.

[0016] Figure 3 This is a bottom view of the clamping device provided by this utility model in the state where the movable clamping block and the actuating ring are released.

[0017] Figure 4 A bottom view of a single movable clamping block in a clamping device provided by this utility model.

[0018] Reference numerals: 1-Positioning sleeve, 11-Upper cavity, 12-Lower cavity, 13-Air inlet, 2-Top cover, 3-Base, 31-Third sealing ring, 4-Shaft sleeve, 401-Cylinder body, 402-Support plate, 403-Positioning plate, 41-First elastic element, 42-Second elastic element, 43-Suppressing plate, 5-Piston disc, 51-Connecting rod, 52-Actuating ring, 53-First sealing ring, 54-Second sealing ring, 6-Modible clamping block, 60-Actuating groove, 61-Guide groove, 7-Positioning joint. Detailed Implementation

[0019] The specific implementation method is described below with reference to the accompanying drawings.

[0020] Example

[0021] like Figures 1 to 4As shown, this embodiment mainly discloses a clamping device, including a positioning sleeve 1, a top cover 2 connected to the top of the positioning sleeve 1, a base 3 sealed to the bottom of the positioning sleeve 1, a bushing 4 provided on the base 3, the bushing 4, the base 3 and the inner wall of the positioning sleeve 1 forming an annular cavity, the annular cavity being divided into an upper cavity 11 and a lower cavity 12 by a piston disc 5, an air inlet 13 communicating with the upper cavity 11 being opened on the side wall of the positioning sleeve 1, an air outlet 41 communicating with the lower cavity 12 being opened on the base 3, a first elastic element 41 limiting the piston disc 5 and the base 3, an action ring 52 being connected to the piston disc 5 by a connecting rod 51, the connecting rod 51 slidingly and sealingly passing through the top of the bushing 4, a movable clamping block 6 for clamping the positioning connector 7 being horizontally limited and slidable between the bushing 4 and the top cover 2, an action groove 60 cooperating with the action ring 52 being opened in the movable clamping block 6, the action ring 52 abutting against the side wall of the action groove 60 to guide the movable clamping block 6 to slide radially to clamp and release the positioning connector 7. Specifically, the air inlet 13 is connected to the air compressor, and multiple radial air inlets 13 are evenly distributed around the circumference of the positioning sleeve 1. Each air inlet 13 is connected through an annular hole to ensure that the piston disc 5 is evenly stressed and moves vertically, avoiding jamming caused by uneven load, and providing a stable driving force for the radial sliding of the movable clamping block 6; the atmospheric inlet is directly connected to the atmosphere. The positioning connector 7 adopts existing technology, and its main structure, from top to bottom, includes a threaded connector, a positioning section, a clamping section, and a guide head. A connection hole for the positioning section is opened at the center of the top cover 2; the movable clamping block 6 is fitted with the arc surface of the clamping section to achieve tight clamping. The first elastic element 41 can be a spring or a disc spring. Furthermore, the action groove 60 is tapered, wider at the top and narrower at the bottom, providing a self-centering guiding function. When the positioning connector 7 is inserted, even if there is a slight radial deviation, the action ring 52 will automatically correct the position of the movable clamping block 6 as it slides along the tapered groove, so that the positioning connector 7 can quickly align with the center of the fixture, reducing manual alignment time and improving clamping efficiency. The action groove 60 is provided with guide grooves 61 for guiding the sliding of the connecting rod 51. The number and position of the guide grooves 61 correspond to the number and position of the connecting rod 51. The guide grooves 61 are connected to the action groove 60 in the radial direction. In its natural state, the piston disc 5 abuts against the upper part of the bushing 4 under the action of the first elastic element 41, the actuating ring 52 is located at the top of the conical actuating groove 60, and the movable clamping block 6 is in the position of clamping the positioning connector 7. When the positioning connector 7 needs to be inserted, compressed air is introduced through the air inlet 13 to drive the piston disc 5 to move downward, compressing the first elastic element 41. Under the guidance of the through hole on the bushing 4, the connecting rod 51 drives the actuating ring 52 to move vertically downward. The actuating ring 52 abuts against the inner wall of the actuating groove 60, converting the vertical force into a radial force to drive the movable clamping block 6 to open radially in all directions. After the positioning connector 7 is placed in place, the air inlet 13 stops supplying air, and the piston disc 5 pushes upward under the elastic restoring force of the first elastic element 41, driving the movable clamping block 6 to clamp the positioning connector 7, thereby realizing the positioning and locking of the positioning connector 7, reducing the cumbersomeness of clamping and reducing labor intensity.

[0022] Furthermore, in a specific implementation, a second elastic element 42 is coaxially arranged inside the bushing 4 provided in this embodiment of the present invention. One end of the second elastic element 42 is detachably connected to the bottom of the bushing 4, and the other end of the second elastic element 42 is connected to a stop plate 43 that contacts the positioning joint 7. Specifically, the second elastic element 42 can also be a spring or a disc spring. When the positioning joint 7 is inserted into the clamp, the guide head of the positioning joint 7 abuts against and compresses the second elastic element 42 downward. When it is necessary to release the positioning joint 7, the movable clamp 6 opens, and the positioning joint 7 pops out upward under the elastic restoring force of the second elastic element 42, facilitating the removal of the positioning joint 7.

[0023] Furthermore, in specific implementations, the movable clamping block 6 provided in this embodiment of the present invention is composed of at least three fan-shaped structures evenly divided in the circumferential direction. The at least three fan-shaped clamping blocks are evenly distributed in the circumferential direction, ensuring that the radial clamping force on the positioning joint 7 is symmetrical and balanced, avoiding off-center loading and ensuring that its axis is highly coincident with the fixture axis. Simultaneously, the multi-lobed structure reduces the volume and weight of a single movable clamping block 6, reduces motion inertia, and makes the movable clamping block 6 more responsive during radial sliding. Combined with the pneumatic drive system, it can achieve rapid clamping / releasing, improving the cycle efficiency of the automated production line. In addition, the independent fan-shaped movable clamping blocks 6 allow for the replacement of individual damaged parts without the need for complete disassembly of the fixture, reducing maintenance costs and downtime.

[0024] Furthermore, in a specific implementation, the bushing 4 provided in this embodiment of the present invention includes a cylindrical body 401. A support plate 402, which is sealed to the inner wall of the positioning sleeve 1, is horizontally supported at the upper end of the cylindrical body 401. A positioning plate 403, which engages with the base 3, is connected to the lower end of the cylindrical body 401. The support plate 402, which is sealed to the inner wall of the positioning sleeve 1, provides a horizontal support reference for the movable clamping block 6. The positioning plate 403, which engages with the base 3, enables rapid alignment of the bushing 4 and the base 3 through a mechanical positioning structure, simplifying the assembly operation.

[0025] Furthermore, in a specific implementation, a first sealing ring 53 is provided on the inner side of the piston disc 5 in the embodiment of this utility model, which contacts the outer wall of the bushing 4, and a second sealing ring 54 is provided on the outer side of the piston disc 5, which contacts the inner wall of the positioning sleeve 1. The provision of the first sealing ring 53 and the second sealing ring 54 prevents compressed air in the upper cavity 11 from leaking into the lower cavity 12. In addition, while the first sealing ring 53 and the second sealing ring 54 form a dynamic seal during sliding, they can also store a small amount of grease, providing continuous lubrication for the contact surfaces of the piston disc 5 with the bushing 4 and the positioning sleeve 1, reducing frictional resistance, lowering the wear rate of components, and extending the maintenance cycle of the fixture.

[0026] Furthermore, in specific implementation, the positioning sleeve 1 and the base 3 provided in this utility model embodiment are threadedly connected, which facilitates quick assembly and disassembly. A third sealing ring 31 is provided between the positioning sleeve 1 and the base 3 to fill the gap between the positioning sleeve 1 and the base 3 and eliminate micro-leakage channels.

[0027] Furthermore, in specific implementation, the positioning sleeve 1 and the top cover 2 provided in this embodiment of the present invention are fitted together in a stepped manner and then fastened with bolts. The stepped fit provides a precise radial positioning reference for the top cover 2 and the positioning sleeve 1, ensuring that the center hole of the top cover 2 is coaxial with the axis of the positioning sleeve 1, providing a stable top guide for the radial sliding of the movable clamping block 6, and avoiding jamming of the clamping block caused by the offset of the top cover 2. The bolt fastening structure provides sufficient axial preload, making the top cover 2 and the positioning sleeve 1 form a rigid connection. When subjected to alternating loads during processing, it can effectively suppress fretting wear at the connection point and ensure the structural stability of the fixture after long-term use.

Claims

1. A clamping device, characterized in that, The system includes a positioning sleeve (1), with a top cover (2) connected to the top of the positioning sleeve (1) and a base (3) sealed to the bottom of the positioning sleeve (1). A bushing (4) is provided on the base (3). The bushing (4), the base (3), and the inner wall of the positioning sleeve (1) together form an annular cavity. The annular cavity is divided into an upper cavity (11) and a lower cavity (12) by a piston disc (5). An air inlet (13) communicating with the upper cavity (11) is opened on the side wall of the positioning sleeve (1), and an air outlet communicating with the lower cavity (12) is opened on the base (3). The piston disc (5) and the... A first elastic element (41) is provided between the base (3). An action ring (52) is connected to the piston disc (5) via a connecting rod (51). The connecting rod (51) slides through the top of the bushing (4). A movable clamping block (6) for clamping the positioning joint (7) is provided between the bushing (4) and the top cover (2). An action groove (60) that cooperates with the action ring (52) is provided in the movable clamping block (6). The action ring (52) abuts against the side wall of the action groove (60) to guide the movable clamping block (6) to slide radially to clamp and release the positioning joint (7).

2. The clamping device according to claim 1, characterized in that, The function groove (60) is tapered, wider at the top and narrower at the bottom, and the function groove (60) is provided with a guide groove (61) for guiding the connecting rod (51) to slide.

3. The clamping device according to claim 1, characterized in that, A second elastic element (42) is coaxially arranged inside the bushing (4). One end of the second elastic element (42) is detachably connected to the bottom of the bushing (4), and the other end of the second elastic element (42) is connected to a stop plate (43) that contacts the positioning joint (7).

4. A clamping device according to claim 1, characterized in that, The movable clamp (6) consists of at least a sector-shaped structure that is divided into three parts along the circumference.

5. A clamping device according to claim 1, characterized in that, The bushing (4) includes a cylindrical body (401), with a support plate (402) horizontally supported on the upper end of the cylindrical body (401) and sealed to the inner wall of the positioning sleeve (1), and a positioning plate (403) connected to the lower end of the cylindrical body (401) and engaged with the base (3).

6. A clamping device according to claim 1, characterized in that, The piston disc (5) is provided with a first sealing ring (53) that contacts the outer wall of the bushing (4) on the inner side, and the piston disc (5) is provided with a second sealing ring (54) that contacts the inner wall of the positioning sleeve (1) on the outer side.

7. A clamping device according to claim 1, characterized in that, The positioning sleeve (1) is threadedly connected to the base (3), and a third sealing ring (31) is provided between the positioning sleeve (1) and the base (3).

8. A clamping device according to claim 1, characterized in that, The positioning sleeve (1) and the top cover (2) are fitted together in a stepped manner and then fastened with bolts.

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