Clamping device and machine tool

Abstract

The invention discloses a clamping device and a machine tool. The clamping device is at least used for being installed on a preset workbench so as to clamp a workpiece to the workbench. The clamping device comprises a base and a chuck assembly. Wherein the chuck assembly is arranged on the base and can swing in the height direction of the base, the chuck assembly comprises a main body, a first conductive part, a clamping part and a detection part, the first conductive part is arranged on the main body and used for being electrically connected with a power supply, the clamping part is connected to the side, close to a workpiece, of the main body through a connecting piece, and a second conductive part is arranged on the clamping part; the clamping part is provided with a first position which is spaced from the main body by a preset distance so that a preset gap can be formed between the second conductive part and the first conductive part, the clamping part is further provided with a second position which makes contact with the main body so that the second conductive part can be electrically connected with the first conductive part, and the detection component is configured to send a clamping signal when the clamping part is located at the second position. The clamping device can solve the problem that a sensor of an existing clamping device cannot accurately judge whether a chuck clamps a workpiece or not.

Description

Technical Field

[0001] The present invention relates to the technical field of clamps, and in particular to a clamping device and a machine tool. Background Art

[0002] In the prior art, in the field of vacuum equipment, due to the closed working space, low environmental visibility or hidden matching position of the fixture and the workpiece, it is difficult for operators to directly judge the clamping status by vision. Therefore, they usually need to rely on monitoring devices such as position sensors and pressure sensors to indirectly feedback the clamping signal to assist in judging the clamping status.

[0003] However, existing sensors often output signals based on the fixture's mechanical action (e.g., a chuck closure signal) rather than directly reflecting the actual clamping force or contact status on the workpiece. This can lead to a phenomenon known as "false clamping": the sensor signals "clamped," but the chuck doesn't actually securely grip the workpiece due to factors such as workpiece positioning deviation, fixture wear, and foreign object interference. This situation not only affects the stability of the vacuum process but can also lead to equipment collisions, process failures, and even safety accidents due to loose workpieces. Summary of the Invention

[0004] The main purpose of the present invention is to provide a clamping device and a machine tool, which at least solve the problem that the sensor of the clamping device in the prior art cannot accurately determine whether the chuck is clamping the workpiece.

[0005] According to one aspect of the present invention, there is provided a clamping device, which is at least used to be mounted on a predetermined workbench to clamp a workpiece on the workbench, and the clamping device comprises: base; A chuck assembly, wherein the chuck assembly is arranged on the base and can swing along the height direction of the base, the chuck assembly includes a main body, a first conductive part, a clamping part and a detection component, the first conductive part is arranged on the main body and is used to be electrically connected to a power supply, the clamping part is connected to the side of the main body close to the workpiece through a connecting piece, a second conductive part is provided on the clamping part, the clamping part has a first position at a predetermined distance from the main body so that the second conductive part and the first conductive part have a predetermined gap, the clamping part also has a second position in contact with the main body so that the second conductive part and the first conductive part are electrically connected, and the detection component is configured to send a clamping signal when the clamping part is in the second position.

[0006] Furthermore, the first conductive component includes: an elastic plunger top screw, the elastic plunger top screw being fixedly arranged on the main body and extending along the thickness direction of the main body; An insulating sleeve is provided on the outer peripheral side of the elastic plunger top screw.

[0007] Furthermore, the clamping portion further includes an insulating layer, and the insulating layer is arranged on a side of the clamping portion away from the main body.

[0008] Furthermore, the main body is provided with a light hole, which is provided through the thickness direction of the main body, and the connecting member includes: A limiting member, comprising a limiting block and a connecting column, wherein the connecting column is disposed through the light hole and is movable along the length direction of the light hole, and the limiting block is located at an end of the connecting column and at least partially protrudes from an outer edge of the connecting column; A first insulating member is provided through the clamping portion and extends to the main body to be connected with the limiting member. When the main body is in the first position, the first conductive portion and the second conductive portion have the predetermined gap.

[0009] Furthermore, the detection component includes: a conductive member, the conductive member being fixedly disposed on the main body and used for sending the clamping signal; a second insulating member, the second insulating member being disposed through the conductive member and being movably arranged along a thickness direction of the main body; An elastic member, wherein both ends of the elastic member respectively press against the conductive member and the second insulating member, when the clamping portion is in the first position, the elastic member applies an elastic force to the second insulating member so that the second insulating member presses against the second conductive portion, and when the clamping portion is in the second position, the second conductive portion overcomes the elastic force of the elastic member and pushes the second insulating member back into the body.

[0010] Furthermore, a support rod is provided on the base, and a first end of the support rod is rotatably connected to the base; The main body includes a connecting rod, a first end of the connecting rod is provided with the clamping portion, and a position of the connecting rod close to the clamping portion is rotatably connected to the second end of the support rod; The clamping device also includes a driving assembly, which is connected to the second end of the support rod to drive the second end of the support rod to reciprocate along the height direction of the base, thereby driving the connecting rod to rotate around the second end of the support rod to swing along the height direction of the base.

[0011] Furthermore, the driving assembly includes: a linear motor, wherein the linear motor is arranged on the base; a telescopic shaft extending in a height direction of the base and being driveably connected to the linear motor, wherein the telescopic shaft is driven to extend and retract in the height direction of the base by the linear motor; A Y-shaped connector is arranged at the top end of the telescopic shaft, and the second end of the connecting rod is rotatably connected to the top groove of the Y-shaped connector.

[0012] Furthermore, the clamping device further comprises: Controller; A zero-position contact block, the zero-position contact block being arranged on the telescopic shaft; A zero position switch, the zero position switch is located on the top of the base and is electrically connected to the controller; When the main body switches from the second position to the first position, the linear motor drives the telescopic shaft to retract, the zero position contact block collides with the contact of the zero position switch, so that the zero position switch sends a control signal to the controller, and the controller controls the linear motor according to the signal sent by the zero position switch.

[0013] Furthermore, the housing of the linear motor protrudes from the upper surface of the base, the zero position switch is arranged on the top of the housing, and the clamping device also includes a fixing seat, the fixing seat is arranged on the outer peripheral side of the housing, and the zero position switch is installed on the fixing seat.

[0014] On the other hand, the present application also provides a machine tool, which includes the above-mentioned clamping device.

[0015] In the present invention, the clamping adaptability is improved by the swinging design of the chuck assembly, and the precise and reliable detection of the workpiece clamping state is achieved through the coordination between the main body and the clamping part, as well as the linkage between the first conductive part, the second conductive part, and the detection component. This ensures that the electrical signal is triggered only in the actual clamping state, avoiding misjudgments caused by vibration, slight contact, etc., thereby improving the applicability and safety of the equipment. In addition, the present application directly controls the on-off of the first conductive part and the second conductive part through mechanical action (position change during the clamping process) based on the "gap / contact" state between the clamping part and the main body, without the need for complex sensors (such as pressure sensors, displacement sensors) or control systems. This "mechanical structure with built-in electrical signal switching function" design reduces the number of independent detection elements, simplifies the overall structure, reduces manufacturing costs, and facilitates subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a schematic structural diagram of the clamping device disclosed in an embodiment of the present invention at a first viewing angle; Figure 2A schematic structural diagram of the clamping device disclosed in an embodiment of the present invention at a second viewing angle; Figure 3 for Figure 2 A partial enlarged view of area A in the middle; Figure 4 This is a cross-sectional view of the installation of the connecting member and the detection device of the clamping device disclosed in an embodiment of the present invention; Figure 5 A schematic structural diagram of an elastic plunger screw of a clamping device disclosed in an embodiment of the present invention; Figure 6 A schematic structural diagram of a detection component of a clamping device disclosed in an embodiment of the present invention; Figure 7 A cross-sectional view of a clamping portion of a clamping device disclosed in an embodiment of the present invention in a first position; Figure 8 A cross-sectional view of the clamping portion of the clamping device disclosed in an embodiment of the present invention in a second position; Figure 9 This is a schematic structural diagram of a driving assembly of a clamping device disclosed in an embodiment of the present invention.

[0017] The above drawings include the following reference numerals: 10. Base; 20. Clamp assembly; 21. Main body; 211. Optical hole; 212. Connecting rod; 22. First conductive portion; 221. Elastic plunger screw; 2211. Screw; 2212. Elastic plunger; 2213. Elastic element; 222. Insulating sleeve; 23. Clamping portion; 231. Second conductive portion; 232. Insulating layer; 24. Detection component; 241. Conductive member; 242. Second insulating member; 243. Elastic member ; 25. Connecting part; 251. Limiting part; 2511. Limiting block; 2512. Connecting column; 252. First insulating part; 30. Support rod; 40. Driving assembly; 41. Linear motor; 411. Housing; 42. Telescopic shaft; 43. Y-type connector; 431. Top groove; 50. Zero position contact; 51. Zero position switch; 60. Fixed seat; 70. Support seat; 80. Pin shaft; 90. Insulating plate; 91. Connecting sleeve. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0021] As mentioned in the background technology, in the field of vacuum equipment, due to the closed working space, low environmental visibility, or the hidden matching position of the clamp and the workpiece, it is difficult for operators to directly determine the clamping state by visual means. Therefore, it is usually necessary to rely on monitoring devices such as position sensors and pressure sensors to indirectly feedback the clamping signal to assist in determining the clamping state. However, the signal output of existing sensors is mostly based on the mechanical action of the clamp itself (such as the chuck closing signal), rather than directly reflecting the actual clamping force or contact state of the workpiece. This may lead to the phenomenon of "false clamping": the sensor has sent a "clamped in place" signal, but due to factors such as workpiece positioning deviation, clamp wear, foreign object interference, etc., the chuck does not actually reliably clamp the workpiece. To this end, the present application provides a clamping device for solving the problem that the sensor of the clamping device cannot accurately determine whether the chuck is clamping the workpiece. The clamping device of the present application will be described in detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 9 As shown, according to an embodiment of the present application, a clamping device is provided, which is at least used to be installed on a predetermined workbench (not shown in the figure) to clamp a workpiece (not shown in the figure) to the workbench, and the clamping device includes: a base 10 and a chuck assembly 20.

[0023] Specifically, the chuck assembly 20 is arranged on the base 10 and can swing along the height direction of the base 10. The chuck assembly 20 includes a main body 21, a first conductive portion 22, a clamping portion 23 and a detection component 24. The first conductive portion 22 is arranged on the main body 21 and is used to be electrically connected to the power supply. The clamping portion 23 is connected to the side of the main body 21 close to the workpiece through a connecting member 25. The clamping portion 23 is provided with a second conductive portion 231. The clamping portion 23 has a first position (such as a predetermined distance) spaced from the main body 21 so that the second conductive portion 231 and the first conductive portion 22 have a predetermined gap. Figure 7 As shown in FIG, the clamping portion 23 also has a second position (as shown in FIG) that contacts the main body 21 so that the second conductive portion 231 is electrically connected to the first conductive portion 22. Figure 8 As shown in FIG, the first detection component 24 is configured to send a clamping signal when the clamping portion 23 is in the second position.

[0024] During actual operation, the clamping device is installed on a predetermined workbench and the workpiece is clamped on the workbench. The chuck assembly 20 is arranged on the base 10 and can swing along the height direction of the base 10. Such an arrangement allows the chuck assembly 20 to adjust its own angle according to the placement of the workpiece, thereby adapting to workpieces of different shapes and different placement positions, ensuring that the clamping portion 23 is in reliable contact with the workpiece, and improving the adaptability between the chuck assembly 20 and the workpiece. The clamping portion 23 is connected to the side of the main body 21 close to the workpiece through a connecting member 25, and a second conductive portion 231 is provided on the clamping portion 23. The clamping portion 23 has a first position at which the second conductive portion 231 is spaced a predetermined distance from the main body 21 so that there is a predetermined gap between the first conductive portion 22 and the clamping portion 23, and a second position at which the clamping portion 23 contacts the main body 21 so that the second conductive portion 231 is electrically connected to the first conductive portion 22. The first and second positions of the clamping portion 23 are directly linked to the electrical connection state through a mechanical structure. Specifically, when the clamping portion 23 is in the first position, the second conductive portion 231 is disconnected from the first conductive portion 22, and the circuit is disconnected, preventing false triggering of the signal. When the clamping portion 23 is in the second position, the clamping portion 23 is clamped to the workpiece, the first conductive portion 22 and the second conductive portion 231 are in contact and conductive, and a clamping signal is transmitted through the detection component 24. This implements a closed-loop logic of "mechanical clamping in place → electrical signal conduction → detection confirmation", ensuring that the signal is triggered only when the clamping state is truly clamped, avoiding false triggering caused by vibration, slight contact, etc.

[0025] In other words, the present application improves clamping adaptability through the swinging design of the chuck assembly 20. Furthermore, through the coordination between the main body 21 and the clamping portion 23, and the linkage between the first and second conductive portions 22, 231, and the detection component 24, accurate and reliable detection of the workpiece clamping state is achieved. This ensures that the electrical signal is triggered only when the clamping state is truly established, avoiding misjudgments caused by vibration, slight contact, and the like, thereby improving the device's applicability and safety. Furthermore, the present application directly controls the switching between the first and second conductive portions 22, 231 through mechanical action (position changes during the clamping process) based on the "separation / contact" state between the clamping portion 23 and the main body 21, eliminating the need for complex sensors (such as pressure sensors or displacement sensors) or control systems. This "mechanical structure with built-in electrical signal switching function" design reduces the number of independent detection components, simplifies the overall structure, and reduces manufacturing costs. Furthermore, the absence of complex electronic components or precision mechanical transmissions facilitates subsequent maintenance.

[0026] like Figure 4 and Figure 5 As shown, the first conductive part 22 includes an elastic plunger top screw 221 and an insulating sleeve 222. The elastic plunger top screw 221 is fixedly arranged on the main body 21 and extends along the thickness direction of the main body 21. The first conductive part 22 is set as the elastic plunger top screw 221. Through the elastic characteristics of the elastic plunger top screw 221, the first conductive part 22 can adaptively adjust its length when in contact with the second conductive part 231 and reduce the damage to the surface of the conductive part caused by rigid collision, thereby extending the service life of the component. At the same time, the insulating sleeve 222 is sleeved on the outer peripheral side of the elastic plunger top screw 221 to effectively isolate the conductive part from the main body 21 and avoid leakage and short circuit. In addition, the insulating sleeve 222 can strictly limit the conductive contact to a specific area (such as the top) of the elastic plunger top screw 221, avoiding accidental contact with surrounding non-target components, ensuring that the current flows only between the first conductive part 22 and the second conductive part 231, and improving the safety of the circuit and the accuracy of signal transmission.

[0027] Specifically, in this application, the elastic plunger screw 221 includes a screw 2211, an elastic plunger 2212, and an elastic element 2213. The elastic plunger 2212 is made of metal, and the elastic element 2213 is a metal spring, which facilitates electrical conduction. The two ends of the elastic element 2213 respectively abut against the screw 2211 and the elastic plunger 2212, providing an adjustable elastic force to prevent rigid impact damage to the conductive contact surface.

[0028] like Figure 3 and Figure 4As shown, the clamping portion 23 further includes an insulating layer 232, which is disposed on the side of the clamping portion 23 facing away from the main body 21. In the present application, the clamping portion 23 achieves circuit conduction (for detecting the clamping state) through the contact between the second conductive portion 231 and the first conductive portion 22. The insulating layer 232 is located on the side of the clamping portion 23 facing away from the main body 21 (i.e., the side in contact with the workpiece), which blocks the conductive path between the clamping portion 23 and the workpiece, ensuring circuit safety.

[0029] Exemplarily, the insulating layer 232 can be made of rubber, plastic, etc. The insulating layer 232 can be arranged on the side of the clamping portion 23 away from the main body 21 by bonding, snap connection, insulating screw connection, etc. At the same time, in the present application, the texture of the insulating layer 232 is usually relatively soft, which can prevent the hard metal surface of the clamping portion 23 from directly contacting the workpiece, reducing damage such as scratches and indentations on the workpiece surface. In addition, some insulating materials (such as rubber) have a high coefficient of friction, which can increase the friction between the clamping portion 23 and the workpiece, prevent the workpiece from slipping during clamping or processing, and enhance the clamping stability. In other words, the provision of the insulating layer 232 not only ensures the accuracy and safety of circuit detection, but also protects the workpiece and the clamping portion 23, while also improving the clamping stability.

[0030] like Figure 4 As shown, the main body 21 is provided with a light hole 211, which is arranged to pass through the thickness direction of the main body 21. The connecting member 25 includes a limit member 251 and a first insulating member 252. The limit member 251 includes a limit block 2511 and a connecting column 2512. The connecting column 2512 is disposed through the light hole 211 and is movable along the length direction of the light hole 211. The limit block 2511 is located at the end of the connecting column 2512 and at least partially protrudes from the outer edge of the connecting column 2512. The first insulating member 252 is disposed through the clamping portion 23 and extends to the main body 21 to connect with the limit member 251. When the main body 21 is in the first position, a predetermined gap is formed between the first conductive portion 22 and the second conductive portion 231.

[0031] Specifically, the diameter of the limit block 2511 is larger than the inner diameter of the light hole 211, forming a hard limit structure. When the clamping part 23 moves, the limit block 2511 contacts the surface of the main body 21 at the moment of limiting the maximum stroke, ensuring that the first conductive part 22 and the second conductive part 231 are reliably separated when the clamping part 23 is in the first position, avoiding accidental contact and conduction. The connecting column 2512 of the limiter 251 forms a sliding pair with the light hole 211, so that the clamping part 23 can only move in a straight line along the length direction of the light hole 211 (that is, the thickness direction of the main body 21), strictly constraining its movement trajectory. This design avoids lateral deviation or shaking that may occur during the clamping process, ensures the alignment accuracy of the second conductive part 231 and the first conductive part 22, and improves the reliability of the electrical connection.

[0032] For example, the stopper 251 can be a screw, bolt, pin, or the like; the first insulating member 252 can be made of engineering plastic or ceramic, completely isolating the stopper 251 between the clamping portion 23 and the main body 21. Even if the clamping portion 23 or the main body 21 accidentally becomes charged, the first insulating member 252 can prevent the current from flowing, reducing the risk of electric shock to the operator or the probability of a short circuit in the device.

[0033] like Figure 4 and Figure 6 As shown, the detection component 24 includes a conductive member 241, a second insulating member 242 and an elastic member 243. Among them, the conductive member 241 is fixedly arranged on the main body 21 and is used to send a clamping signal. The second insulating member 242 is passed through the conductive member 241 and is movably arranged along the thickness direction of the main body 21. The two ends of the elastic member 243 respectively press against the conductive member 241 and the second insulating member 242. When the clamping portion 23 is in the first position, the elastic member 243 applies an elastic force to the second insulating member 242 so that the second insulating member 242 presses against the second conductive portion 231. When the clamping portion 23 is in the second position, the second conductive portion 231 overcomes the elastic force of the elastic member 243 and pushes the second insulating member 242 back into the main body 21.

[0034] Specifically, in the present application, when the clamping portion 23 is in the first position (unclamped state), the elastic member 243 pushes the second insulating member 242 against the second conductive portion 231 through elastic force. At this time, the second insulating member 242 acts as a physical barrier, completely isolating the conductive member 241 from the second conductive portion 231, avoiding false triggering due to external interference (such as static electricity, false touch), and ensuring the stability of the system in the non-operating state. When the clamping portion 23 moves to the second position (clamped state), the second conductive portion 231 overcomes the elastic force and pushes the second insulating member 242 back, so that the conductive member 241 directly contacts the second conductive portion 231. This action triggers the conductive member 241 to send a clamping signal, realizing real-time detection of the clamping action.

[0035] For example, the second insulating member 242 can be made of an engineering plastic such as polyetherimide (PEI). Engineering plastics offer high insulation, corrosion resistance, and abrasion resistance, effectively reducing material loss due to friction during long-term use. In this application, the second insulating member 242 is inserted into the conductive member 241 and moves along the thickness of the main body 21. This axial layout minimizes lateral space usage. Furthermore, the detection component 24, as an independent module, can be conveniently integrated into the main body 21 and coordinate with other functional components. This design reduces overall system complexity while also facilitating maintenance and replacement of faulty components.

[0036] like Figure 1 and Figure 2As shown, a support rod 30 is provided on the base 10, and the first end of the support rod 30 is rotatably connected to the base 10; the main body 21 includes a connecting rod 212, and the first end of the connecting rod 212 is provided with a clamping portion 23, and the connecting rod 212 is rotatably connected to the second end of the support rod 30 near the clamping portion 23; the clamping device also includes a driving assembly 40, which is connected to the second end of the support rod 30 to drive the second end of the support rod 30 to reciprocate along the height direction of the base 10, thereby driving the connecting rod 212 to rotate around the second end of the support rod 30 to swing along the height direction of the base 10.

[0037] The support rod 30 and the connecting rod 212 form a dual-rotational pair structure (the support rod 30 rotates around the base 10, and the connecting rod 212 rotates around the second end of the support rod 30). The drive assembly 40 converts linear motion (in the height direction) into the swinging motion of the connecting rod 212 by controlling the lifting and lowering of the second end of the support rod 30. This "linear drive → rotational swing" conversion method avoids the energy loss of complex transmission structures (such as gears and cams), ensures that the driving force is directly transmitted to the clamping part 23, and improves control accuracy. The clamping part 23 swings along the height direction of the base 10 with the connecting rod 212, and its motion trajectory is arc-shaped, which can adapt to the clamping requirements of workpieces of different heights and angles. Compared with simple linear lifting or rotational motion, the arc-shaped trajectory can reduce the interference between the clamping part 23 and the workpiece (such as avoiding collision with the edge of the workpiece).

[0038] Furthermore, the first end of the support rod 30 is rotationally connected to the base 10, and the second end is simultaneously connected to the connecting rod 212 and the drive assembly 40, forming a triangular support structure of "base 10-support rod 30-connecting rod 212". This design integrates the driving, supporting and transmission functions into a few components, greatly reducing the space occupied by the device. The force of the clamping part 23 is transmitted to the support rod 30 through the connecting rod 212, and then borne by the base 10, forming a force conduction path of "clamping point → connecting rod 212 → support rod 30 → base 10", avoiding local stress concentration. When the clamping part 23 is subjected to the reaction force of the workpiece, the rigid connection of the double rotating pair can reduce shaking and ensure the stable position of the workpiece during the clamping process.

[0039] Furthermore, in the present application, a support base 70 is also provided on the base 10. The support base 70 is used to connect the support rod 30, and an insulating plate 90 is also provided between the support base 70 and the base 10. The insulating plate 90 can insulate the support base 70 from the base 10 to prevent the two from forming a conductive circuit and interfering with the accurate transmission of the clamping signal. The insulating plate 90 can also avoid the risk of short circuit between the base 10 and the support base 70, preventing the electrical components in the conductive member 241 and the drive assembly 40 from being damaged due to short circuit. In the present application, the support rod 30 of different lengths will be replaced according to actual needs so that the clamping portion 23 can better clamp the workpiece. The support rod 30 and the support base 70 are connected by a pin 80. The pin 80 is easy to disassemble and assemble quickly, which is conducive to the rapid replacement and maintenance of the support rod 30. The use of the pin 80 to connect the support rod 30 and the support base 70 allows the worn rotating parts (such as bearings) to be replaced separately during maintenance without the need to disassemble the entire device.

[0040] For example, the drive assembly 40 drives the second end of the support rod 30 along the height of the base. This configuration allows for flexible selection, eliminating the need for complex transmission direction conversion mechanisms. Furthermore, the reciprocating stroke of the drive assembly 40 directly determines the lifting distance of the second end of the support rod 30, thereby controlling the swing amplitude of the connecting rod 212. In this application, the clamping device comprises the support rod 30, the connecting rod 212, the drive assembly 40, and the pin 80 (rotating connector). The clamping device does not require complex gear meshing or cam groove structures, reducing the risk of failures due to component wear and jamming.

[0041] like Figure 1 、 Figure 2 as well as Figure 9 As shown, the drive assembly 40 includes a linear motor 41, a telescopic shaft 42, and a Y-shaped connector 43. The linear motor 41 is mounted on the base 10; the telescopic shaft 42 extends along the height of the base 10 and is drivably connected to the linear motor 41. Driven by the linear motor 41, the telescopic shaft 42 extends and retracts along the height of the base 10. The Y-shaped connector 43 is mounted at the top of the telescopic shaft 42, and the second end of the connecting rod 212 is rotatably connected to the top groove 431 of the Y-shaped connector 43.

[0042] Specifically, the linear motor 41 directly drives the telescopic shaft 42 to extend and retract along the height direction of the base 10, eliminating the intermediate transmission mechanism such as the traditional rotary motor + screw / rack, and directly converting electrical energy into linear motion mechanical energy. This "zero transmission" method greatly reduces energy loss and improves the response speed of the system. The Y-type connector 43 converts the linear motion of the telescopic shaft 42 into the swinging motion of the connecting rod 212. Among them, the second end of the connecting rod 212 is embedded in the top groove 431 of the Y-type connector 43, and the rotational connection is achieved through the pin 80 or the bearing. The forked design of the Y-type connector 43 increases the contact area with the connecting rod 212, dispersing the bending moment and torque generated during the clamping process.

[0043] Furthermore, the linear motor 41, telescopic shaft 42, and Y-shaped connector 43 can be removed from the base 10 as a single module (typically connected by bolts). Maintenance requires replacing the entire module, eliminating the need to disassemble the complex transmission system. Furthermore, in this application, a connecting sleeve 91 is provided between the Y-shaped connector 43 and the telescopic shaft 42. This sleeve facilitates adjusting the degree of clamping between the clamping portion 23 and the workpiece.

[0044] like Figure 1 、 Figure 2 as well as Figure 9 As shown, the clamping device also includes a controller (not shown), a zero position contact 50, and a zero position switch 51. The zero position contact 50 is mounted on the telescopic shaft 42; the zero position switch 51 is located at the top of the base 10 and is electrically connected to the controller. When the main body 21 switches from the second position to the first position, the linear motor 41 drives the telescopic shaft 42 to retract. The zero position contact 50 collides with the contacts of the zero position switch 51, causing the zero position switch 51 to send a control signal to the controller. The controller then controls the linear motor 41 based on the signal sent by the zero position switch 51.

[0045] Specifically, in the present application, the cooperation of the zero position switch 51 and the zero position contact block 50 provides the clamping device with a unique "mechanical zero position" reference. When the main body 21 is switched from the second position to the first position, during the retraction process of the telescopic shaft 42, the zero position contact block 50 triggers the zero position switch 51, and the zero position switch 51 sends an electrical signal indicating that it is loose to the position, and the controller records the initial position based on this. And the controller can preset the movement stroke of the telescopic shaft 42 based on the zero position signal, without relying on complex absolute position sensors. When the telescopic shaft 42 retracts to the limit position, the zero position contact block 50 triggers the zero position switch 51, and the controller can immediately control the linear motor 41 to stop moving (such as cutting off the power or reversing the drive) after receiving the signal, to avoid structural collisions (such as hitting the base 10 or the linear motor housing) caused by the continuous retraction of the telescopic shaft 42. In addition, if the linear motor 41 fails (such as a driver out of control) and causes the telescopic shaft 42 to retract abnormally, the triggering signal of the zero position switch 51 can be used as an "emergency stop" instruction to force the motor to be powered off, preventing safety accidents (such as injuring the operator or damaging the workpiece) caused by excessive swinging of the clamping part 23. That is, through the combination of the zero position contact block 50, the zero position switch 51 and the controller, the positioning accuracy and running stability of the clamping device are improved.

[0046] Again referring to Figure 1 , Figure 2 and Figure 9 , the outer shell 411 of the linear motor 41 protrudes from the upper surface of the base 10, the zero position switch 51 is arranged on the top of the outer shell 411, and the clamping device further comprises a fixing seat 60, which is sleeved on the outer circumferential side of the outer shell 411 of the linear motor 41, and the zero position switch 51 is mounted on the fixing seat 60. In the present application, sleeving the fixing seat 60 on the outer circumferential side of the outer shell 411 of the linear motor 41 is equivalent to providing the zero position switch 51 with a rigid support structure directly associated with the power source (linear motor 41). Compared with fixing the zero position switch 51 on the base 10 alone, this design can reduce the loosening or position deviation of the switch caused by the vibration of the base 10 and the high-frequency tremor of the linear motor 41 during operation, and ensure that the triggering position of the zero position contact block 50 and the zero position switch 51 is always accurate. And the outer shell 411 of the linear motor 41 is directly related to the movement of the telescopic shaft 42, and the connection of the fixing seat 60 and the outer shell 411 can make the position of the zero position switch 51 strictly correspond to the movement trajectory of the telescopic shaft 42, prevent "zero drift" caused by the assembly error of the base 10 and the outer shell 411 of the linear motor 41, and ensure the long-term reliability of zero calibration.

[0047] Furthermore, in the present application, a fixing base 60 is provided as a mounting carrier for the zero position switch 51. This fixing base 60 can be pre-assembled with the housing 411 (e.g., by bolting or interference fit) and then integrally mounted on the base 10. This "modular" design eliminates the need for complex position calibration of the zero position switch 51 (e.g., adjusting the vertical spacing and horizontal alignment with the zero position contact 50). Simply ensuring the relative position of the housing 411 and the base 10 is accurate can indirectly guarantee the functional accuracy of the zero position switch 51, shorten installation time, and facilitate adjustment and replacement later in the event of a malfunction or a need for a different model of the zero position switch 51.

[0048] Recombination Figures 1 to 9 As shown, the present application also provides a machine tool, which includes the above-mentioned clamping device. The above-mentioned clamping device is installed on the machine tool. Therefore, the machine tool provided by this embodiment includes all the technical effects of the above-mentioned clamping device. Since the technical effects of the clamping device have been described in detail above, they will not be repeated here.

[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0050] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the present invention.

Claims

1. A clamping device, which is at least used to be installed on a predetermined workbench to clamp a workpiece on the workbench, characterized in that: The clamping device comprises: Base (10); A chuck assembly (20), the chuck assembly (20) is arranged on the base (10) and can swing along the height direction of the base (10), the chuck assembly (20) includes a main body (21), a first conductive part (22), a clamping part (23) and a detection component (24), the first conductive part (22) is arranged on the main body (21) and is used to be electrically connected to a power supply, the clamping part (23) is connected to a side of the main body (21) close to the workpiece through a connecting member (25), and the clamping part (23) A second conductive portion (231) is provided on the main body (21), the clamping portion (23) has a first position spaced a predetermined distance from the main body (21) so that the second conductive portion (231) and the first conductive portion (22) have a predetermined gap, the clamping portion (23) also has a second position contacting the main body (21) so that the second conductive portion (231) and the first conductive portion (22) are electrically connected, and the detection component (24) is configured to send a clamping signal when the clamping portion (23) is in the second position.

2. The clamping device according to claim 1, characterized in that The first conductive part (22) comprises: an elastic plunger top screw (221), the elastic plunger top screw (221) being fixedly arranged on the main body (21) and extending along the thickness direction of the main body (21); An insulating sleeve (222) is sleeved on the outer peripheral side of the elastic plunger top screw (221).

3. The clamping device according to claim 1, characterized in that The clamping portion (23) further includes an insulating layer (232), and the insulating layer (232) is arranged on a side of the clamping portion (23) facing away from the main body (21).

4. The clamping device according to claim 1, characterized in that The main body (21) is provided with a light hole (211), the light hole (211) being provided through the main body (21) in a thickness direction, and the connecting member (25) comprises: a limiting member (251), the limiting member (251) comprising a limiting block (2511) and a connecting column (2512), the connecting column (2512) being arranged through the light hole (211) and movable along the length direction of the light hole (211), the limiting block (2511) being located at an end of the connecting column (2512) and at least partially protruding from an outer edge of the connecting column (2512); A first insulating member (252) is provided in the clamping portion (23) and extends to the main body (21) to connect with the limiting member (251); and when the main body (21) is in the first position, the first conductive portion (22) and the second conductive portion (231) have the predetermined gap.

5. The clamping device according to claim 1, characterized in that The detection component (24) includes: a conductive member (241), the conductive member (241) being fixedly disposed on the main body (21) and used for sending the clamping signal; a second insulating member (242), the second insulating member (242) being disposed through the conductive member (241) and being movably arranged along the thickness direction of the main body (21); An elastic member (243), wherein two ends of the elastic member (243) respectively abut against the conductive member (241) and the second insulating member (242); when the clamping portion (23) is in the first position, the elastic member (243) applies an elastic force to the second insulating member (242) so that the second insulating member (242) abuts against the second conductive member (231); and when the clamping portion (23) is in the second position, the second conductive member (231) overcomes the elastic force of the elastic member (243) and pushes the second insulating member (242) back into the interior of the main body (21).

6. The clamping device according to claim 1, characterized in that A support rod (30) is provided on the base (10), and a first end of the support rod (30) is rotatably connected to the base (10); The main body (21) comprises a connecting rod (212), a first end of the connecting rod (212) being provided with the clamping portion (23), and a position of the connecting rod (212) close to the clamping portion (23) being rotatably connected to the second end of the support rod (30); The clamping device further includes a driving assembly (40), wherein the driving assembly (40) is connected to the second end of the support rod (30) to drive the second end of the support rod (30) to reciprocate along the height direction of the base (10), thereby driving the connecting rod (212) to rotate around the second end of the support rod (30) to swing along the height direction of the base (10).

7. The clamping device according to claim 6, characterized in that The drive assembly (40) comprises: a linear motor (41), the linear motor (41) being arranged on the base (10); a telescopic shaft (42), the telescopic shaft (42) extending in the height direction of the base (10) and being drive-connected to the linear motor (41), the telescopic shaft (42) being driven by the linear motor (41) to telescope in the height direction of the base (10); A Y-shaped connector (43) is provided at the top end of the telescopic shaft (42), and the second end of the connecting rod (212) is rotatably connected to the top groove (431) of the Y-shaped connector (43).

8. The clamping device according to claim 7, characterized in that The clamping device further comprises: Controller; a zero-position contact block (50), the zero-position contact block (50) being arranged on the telescopic shaft (42); a zero position switch (51), the zero position switch (51) being located on the top of the base (10), and the zero position switch (51) being electrically connected to the controller; When the main body (21) switches from the second position to the first position, the linear motor (41) drives the telescopic shaft (42) to retract, and the zero position contact block (50) collides with the contact of the zero position switch (51), so that the zero position switch (51) sends a control signal to the controller, and the controller controls the linear motor (41) according to the signal sent by the zero position switch (51).

9. The clamping device according to claim 8, characterized in that The housing (411) of the linear motor (41) protrudes from the upper surface of the base (10), the zero position switch (51) is arranged on the top of the housing (411), and the clamping device also includes a fixing seat (60), the fixing seat (60) is sleeved on the outer peripheral side of the housing (411), and the zero position switch (51) is installed on the fixing seat (60).

10. A machine tool, characterized in that: The machine tool comprises the clamping device according to any one of claims 1 to 9.

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