Safe and reliable workpiece clamping structure

Abstract

The utility model belongs to the technical field of clamps, and particularly relates to a safe and reliable workpiece clamping structure which comprises a fixed support, a rotary assembly, a clamping disc, a jacking assembly and an elastic reset assembly. The clamping disc is coaxially arranged on the rotary assembly, and a clamping jaw is arranged on the side, opposite to the side where the rotary assembly is arranged, of the clamping disc. The jacking assembly is arranged on the fixed support and used for jacking the clamping disc so that the clamping disc can be separated from the rotating assembly. One end of the elastic reset assembly is installed on the clamping disc, and the other end of the elastic reset assembly is connected with the rotation assembly. According to the clamping device, the clamping disc is jacked by the jacking assembly, so that the clamping disc is separated from the rotary assembly, a space gap for installing a workpiece is vacated for the clamping jaw, a mechanical clamping mode is adopted, the elastic reset assembly is used for providing clamping force required by clamping, and the safety and the reliability of the clamping process are ensured.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a safe and reliable workpiece clamping structure. Background Technology

[0002] In the production, processing, assembly, and oil control operations of plunger pumps, clamping structures play a crucial role. They ensure the precise positioning and stable clamping of key components such as the plunger and cylinder during processing and assembly, thereby improving the overall performance of the plunger pump. Clamping structures typically employ mechanical, hydraulic, or pneumatic clamping methods to ensure that the plunger pump workpiece does not loosen or deform due to vibration or other factors during production, processing, or oil control operations.

[0003] For example, common clamping jaws, when they need to clamp a workpiece, their clamping arms are usually controlled by a cylinder or hydraulic cylinder to move towards the workpiece and hold the workpiece firmly with appropriate force and angle, ensuring that the workpiece is fixed in the predetermined position, which facilitates subsequent processing, assembly and other operations.

[0004] However, in practical applications, cylinders and hydraulic cylinders may experience circuit pressure loss due to various reasons (such as aging seals, pipeline leaks, control system failures, etc.). Once the circuit loses pressure, the clamping force originally provided by the cylinder or hydraulic cylinder will disappear rapidly, and the clamping jaws will detach from the workpiece, resulting in the workpiece not being effectively fixed. At this time, after losing the support of clamping force, the workpiece is easily unstable due to external disturbances (such as mechanical vibration, improper operation, etc.), and may even be thrown out of the clamping jaws. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to solve the technical problem that the clamping jaws rely on the cylinder or hydraulic cylinder as the clamping power source for top pressure clamping, and the clamping effect will fail if the circuit loses pressure, this utility model provides a safe and reliable workpiece clamping structure, which uses an elastic reset component to provide the clamping force required for clamping, so that the jaws can clamp the workpiece, thereby ensuring the safety and reliability of the clamping process.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a safe and reliable workpiece clamping structure, comprising:

[0007] Fixed bracket;

[0008] A rotary assembly, which is mounted on the fixed bracket;

[0009] A clamping disc is coaxially mounted on the rotary assembly, and a jaw is provided on the side of the clamping disc opposite to the side on which the rotary assembly is mounted.

[0010] A jacking assembly is arranged on the fixed support and used to jack up the clamping disc to separate the clamping disc from the slewing assembly;

[0011] A resilient reset assembly is mounted at one end on the clamping disc and connected at the other end with the slewing assembly;

[0012] The mounting portion of the workpiece passes through the clamping disc and abuts against the slewing assembly, and the claw is operatively pressed on the mounting portion of the workpiece.

[0013] The jacking assembly is arranged along the axial direction to jack up the clamping disc, so that the clamping disc is separated from the slewing assembly, thereby leaving a space gap for the claw to mount the workpiece. When the jacking force of the jacking assembly on the clamping disc is removed, the clamping disc is reset by the mechanical resilient reset assembly. Since the two ends of the resilient reset assembly are connected with the clamping disc and the slewing assembly respectively, the clamping disc can press the mounting portion of the workpiece on the slewing assembly together with the claw under the action of the resilient reset assembly, thereby achieving the clamping effect of the workpiece in the axial direction. The stability of the workpiece is effectively prevented from being shaken out or falling, and the safety and reliability of the clamping process are ensured. In addition, unless a strong external force overcomes the elastic force of the resilient reset assembly and jacks up the clamping disc along the axial direction to make the claw separate from the workpiece and not be pressed on the mounting portion of the workpiece, the workpiece cannot be removed, thereby ensuring the reliability and safety of the clamping effect. The problem of relying on a cylinder or a hydraulic cylinder as a clamping power source in the traditional scheme is effectively avoided.

[0014] Further, the resilient reset assembly comprises a shoulder bolt and a disc spring, the disc spring is mounted on the clamping disc and sleeved on the shoulder bolt, one end of the shoulder bolt abuts against one side of the disc spring, and the other end of the shoulder bolt passes through the disc spring and is connected with the slewing assembly.

[0015] The technical effect is that the shoulder bolt and the disc spring are used in combination in the resilient reset assembly. The disc spring can withstand a large load and provide a large elastic force in a small space. The short stroke of the disc spring and the compact design can meet the demand of the equipment for the spring and will not occupy too much space. In the case of limited installation space, the disc spring can play a great advantage.

[0016] Further, the number of disc springs is multiple, and the multiple disc springs are arranged in parallel, in straight line or in combination of parallel and straight line arrangement.

[0017] The different arrangement modes can meet different load requirements and displacement space requirements.

[0018] Further, the plurality of claws are arranged around the central spoke of the clamping disc, each of the plurality of claws comprising a press plate movable in a radial direction, the press plate being used to press the mounting portion of the workpiece.

[0019] The specific technical effect is that: the plurality of claws can more evenly distribute the clamping force, avoid workpiece deformation or damage caused by excessive force on a single point, and the larger contact area between the plurality of claws and the workpiece can provide more stable clamping effect, reduce the movement or looseness of the workpiece during processing; the press plate movable in the radial direction can arbitrarily adjust the pressing position of the press plate, and can adapt to more different shapes and sizes of workpieces, improving the versatility and flexibility of the equipment.

[0020] Further, each of the plurality of claws further comprises a fixed handle, a connecting bolt, a first magnet and a ball head plunger, the fixed handle being arranged on the press plate, the first magnet and the ball head plunger being arranged on the clamping disc and in contact with the press plate, the press plate being mounted on the clamping disc through the connecting bolt.

[0021] The specific technical effect is that: the connecting bolt is arranged to connect the press plate and the clamping disc, which can prevent the press plate from falling off, the ball head plunger is arranged on the clamping disc, the ball head part of the ball head plunger is in contact with the press plate, which ensures that the press plate can move smoothly in the radial direction to adjust the pressing position, the first magnet is arranged on the clamping disc and magnetically attracts the press plate, which fixes the position of the press plate and prevents it from moving in the radial direction after pressing the workpiece.

[0022] Further, the jacking assembly comprises an oil cylinder, a first guide shaft, an oil-free bushing and a top sleeve, the oil cylinder is arranged on the fixed support, the oil-free bushing and the top sleeve are arranged on the first guide shaft, the output end of the oil cylinder is connected with the first guide shaft to jack up the clamping disc and separate the clamping disc from the slewing assembly.

[0023] The specific technical effect is that: the oil cylinder and the first guide shaft are designed, pressure hydraulic oil is introduced into the oil cylinder, the cylinder rod outputs mechanical force outward with the top sleeve, and then the clamping disc is separated from the slewing assembly.

[0024] Further, the slewing assembly comprises a cycloidal motor, and a transfer panel, a first transfer disc, a slewing disc and a second transfer disc arranged coaxially in sequence, the slewing disc is rotatably installed on the fixed support through the second transfer disc, the cycloidal motor is used to drive the slewing disc to rotate, the clamping disc is installed on the first transfer disc, and the mounting portion of the workpiece passes through the clamping disc and abuts against the transfer panel.

[0025] The specific technical effect is that the cycloid motor is used for driving the rotating disc to rotate, so that the first adapter disc, the clamping disc and the workpiece installed on the rotating disc rotate with the rotating disc to perform oil control and other operations on the workpiece.

[0026] Further, the first adapter disc is provided with a second guide shaft arranged eccentrically, and the clamping disc is provided with a guide hole matched with the second guide shaft.

[0027] The specific technical effect is that the design of the second guide shaft matched with the guide hole plays a guiding role on the clamping disc, so that the clamping disc does not deviate from the coaxial center during separation from the rotating assembly.

[0028] Further, the fixed support is provided with an inductive sensor for detecting the rotating state of the clamping disc, and the inductive sensor is connected with the jacking assembly.

[0029] The specific technical effect is that the inductive sensor is used for detecting the rotating state of the clamping disc, and when the clamping disc is in the rotating state, the inductive sensor outputs a rotating electric signal to the jacking assembly, so that the jacking assembly remains in a non-working state; and when the clamping disc stops rotating and returns to the initial position, the inductive sensor outputs a rotating-off electric signal to the jacking assembly, so that the jacking assembly is allowed to start and perform the jacking operation.

[0030] Further, the inductive sensor comprises a sensor support, an upper proximity switch and a lower proximity switch, the sensor support is arranged on the fixed support, the upper proximity switch and the lower proximity switch are arranged side by side on the sensor support and connected with the jacking assembly, and the clamping disc is provided with a hole.

[0031] The specific technical effect is that by using the working principle of the proximity switch, when the clamping disc approaches the inductive surface to a certain distance, the switch action can be triggered, and it is identified that the clamping disc is in the rotating state, so that the jacking assembly remains in a non-working state; when the upper proximity switch or the lower proximity switch is opposite to the hole, the proximity switch does not sense the object, which means that the clamping disc stops rotating and returns to the initial position, so that the jacking assembly is allowed to start and perform the jacking operation.

[0032] Compared with the prior art, the utility model has the advantages that:

[0033] (1) The utility model discloses a rotating assembly and a jacking assembly are separated by setting the oil cylinder to move the first guide shaft and make the top sleeve jacking disc, realize that the disc is separated from the rotating assembly, and the space for installing the workpiece is left for the clamping jaw, and the operation is simple and stable.

[0034] (2), the utility model discloses the mechanical type elastic reset component, and the elastic reset component adopts the cooperation of shoulder bolt and disc spring, and disc spring can provide greater elasticity in smaller space, and the clamping disc can be pressed tightly on the rotary assembly with the pawl together owing to the action of disc spring, and the clamping effect of workpiece is realized, unless the strong external force overcomes the elastic force of disc spring and lifts out the clamping disc, makes the pawl separate workpiece and not press tightly on the mounting portion of workpiece, otherwise workpiece can not be taken down, thereby guarantee the reliability and security of clamping effect, in addition, the stroke of disc spring is short, and compact design does not occupy too much space, and has the advantage under the condition of limited installation space;

[0035] (3), the utility model discloses the multiple pawls and is distributed around the clamping disc center spoke, can evenly distribute clamping force, avoid workpiece deformation or damage, provide more stable clamping effect, reduce workpiece movement or slack, and each pawl includes the radial movement of pressing plate, can adapt to different shape and size workpiece, improve equipment versatility and flexibility;

[0036] (4), the utility model discloses the cooperation mode of proximity switch and hole, and when the proximity switch is directly opposite the hole, its inductance does not feel the existence of object, then represents that the clamping disc stops rotating and restores to its initial position, at this time, allow the lifting assembly to start and execute lifting operation, utilize the principle of proximity switch, accurately identify the rotation state of clamping disc, ensure that the lifting assembly starts at proper time, realize the accurate detection of clamping disc position, ensure the accuracy of lifting operation. BRIEF DESCRIPTION OF DRAWINGS

[0037] The utility model is further illustrated below in connection with the drawings and examples.

[0038] Figure 1 It is the explosion structure schematic drawing of the safe and reliable workpiece clamping structure of the utility model;

[0039] Figure 2 It is the front view of the utility model before workpiece clamping;

[0040] Figure 3 It is Figure 2 The A-A section structure schematic drawing in;

[0041] Figure 4 It is Figure 3 The C place local structure enlarged schematic drawing in;

[0042] Figure 5 It is the structure schematic drawing of the utility model after workpiece clamping;

[0043] Figure 6 It is Figure 5 The front view of;

[0044] Figure 7 As Figure 6 The middle B-B cross-sectional structure schematic view;

[0045] Figure 8 As Figure 7 The middle D local structure enlarged schematic view;

[0046] Figure 9 The structure schematic view of disc spring.

[0047] In the figure: 1, the rotating assembly;101, the cycloid motor;102, the adapter panel;103, the first adapter disc;104, the rotating disc;105, the second adapter disc;106, the second guide shaft;107, the second magnet;

[0048] 2, the clamping disc;201, the guide hole;202, the hole;

[0049] 3, the jacking assembly;301, the oil cylinder;302, the first guide shaft;303, the oilless bushing;304, the top sleeve;

[0050] 4, the elastic reset assembly;401, the shoulder bolt;402, the disc spring;

[0051] 5, the claw;501, the pressing plate;502, the connecting bolt;503, the first magnet;504, the ball head plunger;505, the fixed handle;

[0052] 6, the fixed support;601, the sensor support;602, the upper proximity switch;603, the lower proximity switch;

[0053] 7, the workpiece. DETAILED DESCRIPTION

[0054] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic views, and only illustrate the basic structure of the utility model in a schematic manner, so it only shows the relevant structure of the utility model.

[0055] In the description of the utility model, it needs to be understood that, the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are the orientation or positional relation based on the orientation or positional relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0056] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0057] As Figures 1 to 9 As shown in the most preferred embodiment of the utility model, the safe and reliable workpiece clamping structure of the embodiment comprises: fixed support 6, rotary assembly 1, clamping disc 2, jacking assembly 3 and elastic reset assembly 4, rotary assembly 1 is installed on fixed support 6, clamping disc 2 is coaxially arranged on rotary assembly 1, clamping disc 2 is provided with a claw 5 on the side opposite to rotary assembly 1, jacking assembly 3 is arranged on fixed support 6 and is used to jacking clamping disc 2, so that clamping disc 2 is separated from rotary assembly 1, one end of elastic reset assembly 4 is installed on clamping disc 2, the other end of elastic reset assembly 4 is connected with rotary assembly 1,

[0058] Among them, the mounting portion of workpiece 7 passes through clamping disc 2 and abuts on rotary assembly 1, and the pressing plate is operable to press on the mounting portion of workpiece 7.

[0059] Therefore: by setting up the lifting component 3 to lift the clamping plate 2, the clamping plate 2 is separated from the rotating component 1, thereby creating space for the jaws to install the workpiece 7; when the lifting force of the lifting component 3 on the clamping plate 2 is removed, the clamping plate 2 is reset by the elastic reset component 4, and the elastic force of the elastic reset component 4 presses the jaws 5 tightly onto the installation position of the workpiece 7, thereby achieving the clamping effect on the workpiece 7; this utility model adopts a mechanical clamping method, using the elastic reset component 4 to provide the clamping force required for clamping, ensuring the safety and reliability of the clamping process, and effectively avoiding the clamping failure problem caused by the loss of pressure of the cylinder or hydraulic cylinder; in addition, unless a strong external force overcomes the elastic force of the elastic reset component 4 and lifts the clamping plate 2 out, the workpiece 7 cannot be removed, thereby ensuring the reliability and safety of the clamping effect.

[0060] In this embodiment, the elastic reset assembly 4 includes a shoulder bolt 401 and a disc spring 402. The disc spring 402 is mounted on the clamping plate 2 and sleeved on the shoulder bolt 401. One end of the shoulder bolt 401 abuts against one side of the disc spring 402, and the other end of the shoulder bolt 401 passes through the disc spring 402 and is connected to the rotary assembly 1.

[0061] Therefore, the elastic reset assembly 4 uses a shoulder bolt 401 and a disc spring 402 because the disc spring 402 can withstand extremely high loads and provide a large elastic force in a small space. The disc spring 402 has a short stroke and a compact design that can meet the equipment's spring requirements without taking up too much space, giving it a great advantage in situations where installation space is limited.

[0062] In this embodiment, the number of disc springs 402 is N, see [reference]. Figure 8 As shown, N disc springs 402 are arranged in a straight line. The displacement generated by the elastic deformation of each disc spring 402 is denoted as h. Therefore, the displacement generated by the elastic deformation of N disc springs 402 is in the range of 0 to N*h. That is to say, after the lifting assembly 3 lifts the clamping plate 2 and separates the clamping plate 2 from the rotating assembly 1, a space gap of 0 to N*h is made up for the gripper to install the workpiece 7.

[0063] Therefore: a plurality of disc springs 402 are arranged in parallel, in series or a combination of parallel and series arrangement, by adopting diversified arrangement configuration, the disc springs 402 can adapt to different load requirements and displacement space requirements. Specifically, when arranged in parallel, no matter the number of disc springs 402 is set to one, two or four, the displacement amount generated by the elastic deformation of the disc springs 402 remains consistent, denoted as h. Under this configuration, a single disc spring 402 can bear the load P, and when the number increases to two, the load requirement of 2P can be met; further, if the number increases to four, a load of up to 4P can be borne. The load characteristics of the plurality of disc springs 402 used in combination can be referred to the standard JIS B2706 (2003).

[0064] In the embodiment, the plurality of claws 5 are arranged around the central spoke of the clamping disc 2, and each claw 5 comprises a radially movable pressing plate 501 for pressing the mounting portion of the workpiece 7.

[0065] Therefore: the plurality of claws 5 can more evenly distribute the clamping force, avoid deformation or damage of the workpiece 7 caused by excessive force on a single point, and the contact area between the plurality of claws 5 and the workpiece 7 is larger, which can provide more stable clamping effect and reduce movement or loosening of the workpiece 7 during processing; the radially movable pressing plate 501 can arbitrarily adjust the pressing position of the pressing plate 501, which can adapt to more workpieces 7 of different shapes and sizes, and improve the versatility and flexibility of the equipment.

[0066] In the embodiment, each claw 5 further comprises a fixed handle 505, a connecting bolt 502, a first magnet 503 and a ball head plunger 504, the fixed handle 505 is arranged on the pressing plate 501, the first magnet 503 and the ball head plunger 504 are arranged on the clamping disc 2 and contact the pressing plate 501, and the pressing plate 501 is installed on the clamping disc 2 through the connecting bolt 502.

[0067] Therefore: the fixed handle 505 is arranged to drive the pressing plate 501 to move radially more conveniently, the connecting bolt 502 is arranged to connect the pressing plate 501 and the clamping disc 2, which prevents the pressing plate 501 from falling off, the ball head plunger 504 is arranged on the clamping disc 2, the ball head portion of the ball head plunger 504 contacts the pressing plate 501, which ensures that the pressing plate 501 can move radially smoothly to adjust the pressing position, the first magnet 503 is arranged on the clamping disc 2 and magnetically attracts the pressing plate 501, which fixes the position of the pressing plate 501 and prevents it from moving radially after pressing the workpiece 7.

[0068] In the embodiment, the jacking assembly 3 comprises an oil cylinder 301, a first guide shaft 302, an oil-free bushing 303 and a top sleeve 304. The oil cylinder 301 is arranged on the fixed support 6, and the oil-free bushing 303 and the top sleeve 304 are sleeved on the first guide shaft 302. The output end of the oil cylinder 301 is connected with the first guide shaft 302, so as to jack up the clamping disc 2 and separate the clamping disc 2 from the rotating assembly 1.

[0069] Thus, by adopting the design of the oil cylinder 301 and the first guide shaft 302, the pressure hydraulic oil is introduced into the oil cylinder 301, the cylinder rod outputs mechanical force outward with the top sleeve 304, and then the clamping disc 2 is separated from the rotating assembly 1.

[0070] In the embodiment, the rotating assembly 1 comprises a cycloidal motor 101, and a rotary connection panel 102, a first rotary connection disc 103, a rotating disc 104 and a second rotary connection disc 105 arranged coaxially in sequence. The rotating disc 104 is rotatably installed on the fixed support 6 through the second rotary connection disc 105. The cycloidal motor 101 is used to drive the rotating disc 104 to rotate. The clamping disc 2 is installed on the first rotary connection disc 103. The mounting portion of the workpiece 7 passes through the clamping disc 2 and abuts against the rotary connection panel 102.

[0071] Thus, the cycloidal motor 101 is used to drive the rotating disc 104 to rotate, so that the first rotary connection disc 103, the clamping disc 2 and the workpiece 7 installed on the rotating disc 104 rotate with the rotating disc 104, so as to perform oil control and other operations on the workpiece 7.

[0072] In the embodiment, the rotary connection panel 102 is magnetically connected with the first rotary connection disc 103 through a second magnet 107. The first magnet 503 and the second magnet 107 can be selected to have the same specifications.

[0073] In the embodiment, the rotating disc 104 adopts a worm and gear structure. The cycloidal motor 101 drives the worm to rotate, and then drives the gear to rotate, so that the first rotary connection disc 103, the clamping disc 2 and the workpiece 7 installed on the gear rotate with the gear, so as to perform oil control and other operations on the workpiece 7.

[0074] In the embodiment, the first rotary connection disc 103 has two second guide shafts 106 arranged eccentrically. The clamping disc 2 is provided with guide holes 201 matched with the second guide shafts 106.

[0075] Thus, by adopting the design that the second guide shafts 106 are matched with the guide holes 201, the clamping disc 2 is guided, so that the clamping disc 2 does not deviate from the coaxial center during the process of being separated from the rotating assembly 1.

[0076] In the embodiment, the fixed support 6 is provided with an inductive sensor for detecting the rotating state of the clamping disc 2. The inductive sensor is connected with the jacking assembly 3.

[0077] Thus: the induction sensor is used for detecting the rotating state of the clamping disc 2, when the clamping disc 2 is in the rotating state, the induction sensor outputs the rotating electric signal to the jacking assembly 3, at this time the jacking assembly 3 keeps the non-working state, and when the clamping disc 2 stops rotating and restores to the initial position, the induction sensor outputs the rotating break electric signal to the jacking assembly 3, at this time the jacking assembly 3 is allowed to start and perform the jacking operation.

[0078] In the embodiment, the induction sensor comprises a sensor support 601, an upper proximity switch 602 and a lower proximity switch 603, the sensor support 601 is arranged on the fixed support 6, the upper proximity switch 602 and the lower proximity switch 603 are arranged side by side on the sensor support 601 and are connected with the jacking assembly 3, and holes are arranged on the clamping disc 2.

[0079] Thus: by using the working principle of the proximity switch, when the clamping disc 2 approaches the induction surface to a certain distance, the switch action can be triggered, and then it is recognized that the clamping disc 2 is in the rotating state, at this time the jacking assembly 3 keeps the non-working state, when the upper proximity switch 602 or the lower proximity switch 603 is opposite to a hole, at this time the proximity switch does not sense the object, which represents that the clamping disc 2 stops rotating and restores to the initial position, at this time the jacking assembly 3 is allowed to start and perform the jacking operation.

[0080] Specifically, referring to Figure 6 As shown in the figure, the holes A and B are arranged on the clamping disc 2, the holes A and B are symmetrically arranged, the number of the induction sensors is two, which are the induction sensor A and the induction sensor B, the induction sensor A and the induction sensor B are symmetrically arranged, when the hole A is opposite to the lower proximity switch 603 of the induction sensor A and the hole B is opposite to the lower proximity switch 603 of the induction sensor B, at this time the proximity switch does not sense the object, the rotating angle of the clamping disc 2 is 0° and the clamping disc 2 is in the initial position, at this time the jacking assembly 3 is allowed to start and perform the jacking operation, when the rotary disc 104 drives the clamping disc 2 to rotate, the hole A leaves the lower proximity switch 603 of the induction sensor A and the hole B leaves the lower proximity switch 603 of the induction sensor B, at this time the proximity switch senses the object, which represents that the clamping disc 2 is in the rotating state, at this time the jacking assembly 3 keeps the non-working state. Another case is that when the hole A is opposite to the upper proximity switch 602 of the induction sensor B and the hole B is opposite to the upper proximity switch 602 of the induction sensor A, at this time the proximity switch does not sense the object, the rotating angle of the clamping disc 2 is 180°, which also represents that the clamping disc 2 stops rotating and is in the initial position, at this time the jacking assembly 3 is allowed to start and perform the jacking operation.

[0081] The specific working principle of the utility model is as follows:

[0082] Referring to Figures 2 to 4As shown, the working process before clamping is as follows: Hydraulic oil is supplied to the rodless chamber of the hydraulic cylinder 301. The cylinder rod, along with the top sleeve 304, outputs mechanical force outward, separating the clamping disc 2 from the first transition disc 103 (because the clamping disc 2 is pushed outward, moving away from the sensing sensor and outside the sensing range of the upper proximity switch 602, the electrical signal is disconnected). At this time, the shoulder bolt 401 presses the disc spring 402 onto the clamping disc 2, causing the disc spring 402 to deform under pressure (i.e., become flat, see...). Figure 4 As shown, by fixing the handle 505, the pressure plate 501 is moved radially away from the center to make room for the workpiece 7. The workpiece 7 is placed, and the mounting part of the workpiece 7 passes through the clamping plate 2 and is placed on the adapter panel 102. By fixing the handle 505, the pressure plate 501 is moved radially towards the center until it is moved to a position above the mounting part of the workpiece 7 that is suitable for clamping. The upper surface of the mounting part of the workpiece 7 and the lower surface of the pressure plate 501 form a clamping gap. At this time, the first magnet 503 is magnetically attracted to the pressure plate 501.

[0083] See Figures 5 to 8 As shown, the clamping process is as follows: Hydraulic oil is supplied to the rod chamber of the hydraulic cylinder 301, causing the cylinder rod to retract along with the top sleeve 304, thus canceling the outward mechanical force. The shoulder bolt 401, along with the disc spring 402, moves the clamping disc 2 towards the first transition disc 103. Simultaneously, the clamping disc 2 expands, and the disc spring 402 returns from its deformed state to its initial state (i.e., becomes concave-convex, see...). Figure 8 As shown), the pressure plate 501 moves with the clamping disc 2 towards the first transfer disc 103, and then presses against the mounting part of the workpiece 7. (At this time, because the clamping disc 2 moves towards the first transfer disc 103, the clamping disc 2 is close to the sensing sensor and is within the sensing range of the upper proximity switch 602, and a clamping signal is sent.) The cycloidal motor 101 is supplied with pressurized hydraulic oil, which can drive the worm gear structure rotary disc 104 to rotate, so that the first transfer disc 103, the clamping disc 2, and the workpiece 7 mounted on the rotary disc 104 rotate with the rotary disc 104 to perform clamping on the workpiece 7. During operations such as oil control, the clamping disc 2 rotates, causing hole A to move away from the lower proximity switch 603 of sensor A and hole B to move away from the lower proximity switch 603 of sensor B. This indicates that the clamping disc 2 is in a rotating state, and a rotation electrical signal is sent. After the oil control operation is completed, press the reset button, and the PLC controls the cycloidal motor 101 to automatically disconnect the pressure hydraulic oil, driving the rotary disc 104 to rotate until hole A corresponds to the lower proximity switch 603 of sensor A and hole B corresponds to the lower proximity switch 603 of sensor B. The rotation electrical signal is then disconnected, and the clamping disc 2 stops at the initial position.

[0084] Compared with the prior art, the beneficial effects of this utility model are:

[0085] (1) The utility model discloses a jacking assembly 3 is set up to lift the clamping disc 2, makes the clamping disc 2 separate from the rotary assembly 1 to the space clearance of the installation workpiece 7 for the jaw to vacate,

[0086] (2) The utility model discloses a mechanical clamping mode, utilizes elastic reset assembly 4 to provide the clamping force required by clamping, ensures the safety and reliability of clamping process, effectively avoids the clamping failure problem of cylinder or hydraulic cylinder due to pressure loss, in addition, unless the strong external force overcomes the elastic force of elastic reset assembly 4 and lifts out the clamping disc 2, otherwise workpiece 7 can not be taken down, thereby guarantee the reliability and safety of clamping effect,

[0087] (3) The utility model discloses the cooperation mode of proximity switch and hole, detects the rotation state of clamping disc 2, can realize multi-angle multi-position control.

[0088] The above-mentioned ideal embodiment according to the utility model is inspired, and through the above-mentioned description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined by the scope of claims.

Claims

1. A safe and reliable clamping workpiece structure for clamping a workpiece (7), characterized in that, The utility model relates to a kind of workpiece clamping device, including: Fixed support (6); Swing assembly (1), the swing assembly (1) is installed on the fixed support (6); Clamping disc (2), the clamping disc (2) is coaxially arranged on the swing assembly (1), the clamping disc (2) is provided with claw (5) on the side away from the swing assembly (1); Jack-up assembly (3), the jack-up assembly (3) is provided on the fixed support (6), and is used to lift the clamping disc (2), so that the clamping disc (2) is separated from the swing assembly (1); Elastic reset assembly (4), one end of the elastic reset assembly (4) is installed on the clamping disc (2), and the other end of the elastic reset assembly (4) is connected with the swing assembly (1); Wherein, the mounting portion of the workpiece (7) passes through the clamping disc (2) and abuts on the swing assembly (1), and the claw (5) is operable to press on the mounting portion of the workpiece (7).

2. The structure for securely clamping a workpiece according to claim 1, wherein The elastic reset assembly (4) includes shoulder bolt (401) and disc spring (402), the disc spring (402) is installed on the clamping disc (2) and is sleeved on the shoulder bolt (401), one end of the shoulder bolt (401) abuts on one side of the disc spring (402), and the other end of the shoulder bolt (401) passes through the disc spring (402) and is connected with the swing assembly (1).

3. The structure for securely clamping a workpiece according to claim 2, wherein The number of the disc spring (402) is multiple, and multiple disc springs (402) are arranged in parallel, in straight line or in parallel and in straight line combination.

4. The structure for securely clamping a workpiece according to claim 1, wherein The number of the claw (5) is multiple, and multiple claws (5) are arranged around the central spoke of the clamping disc (2), each claw (5) includes a radially movable pressing plate (501), and the pressing plate (501) is used to press the mounting portion of the workpiece (7).

5. The structure for securely clamping a workpiece according to claim 4, wherein Each claw (5) further includes a fixed handle (505), a connecting bolt (502), a first magnet (503) and a ball head plunger (504), the fixed handle (505) is arranged on the pressing plate (501), the first magnet (503) and the ball head plunger (504) are arranged on the clamping disc (2) and contact with the pressing plate (501), and the pressing plate (501) is installed on the clamping disc (2) by the connecting bolt (502).

6. The structure for securely clamping a workpiece according to claim 1, wherein The jack-up assembly (3) includes oil cylinder (301), first guide shaft (302), oil-free bushing (303) and top sleeve (304), the oil cylinder (301) is arranged on the fixed support (6), the oil-free bushing (303) and the top sleeve (304) are sleeved on the first guide shaft (302), and the output end of the oil cylinder (301) is connected with the first guide shaft (302), so as to lift the clamping disc (2), so that the clamping disc (2) is separated from the swing assembly (1).

7. The structure for securely clamping a workpiece according to claim 1, wherein The rotary assembly (1) comprises a cycloid motor (101), and a rotary panel (102), a first rotary disc (103), a rotary disc (104) and a second rotary disc (105) arranged coaxially in sequence, the rotary disc (104) is rotatably installed on the fixed support (6) through the second rotary disc (105), the cycloid motor (101) is used for driving the rotary disc (104) to rotate, the clamping disc (2) is installed on the first rotary disc (103), and the mounting portion of the workpiece (7) passes through the clamping disc (2) and abuts against the rotary panel (102).

8. The structure for securely clamping a workpiece according to claim 7, wherein The first rotary disc (103) is provided with a second guide shaft (106) arranged eccentrically, and the clamping disc (2) is provided with a guide hole (201) matched with the second guide shaft (106).

9. The structure for securely clamping a workpiece according to Claim 1, wherein The fixed support (6) is provided with an inductive sensor for detecting the rotating state of the clamping disc (2), and the inductive sensor is connected with the jacking assembly (3).

10. The structure for securely clamping a workpiece according to Claim 9, wherein The inductive sensor comprises a sensor support (601), an upper proximity switch (602) and a lower proximity switch (603), the sensor support (601) is arranged on the fixed support (6), the upper proximity switch (602) and the lower proximity switch (603) are arranged side by side on the sensor support (601) and connected with the jacking assembly (3), and the clamping disc (2) is provided with a hole (202).

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