Clamping device and screen printing machine

Abstract

The invention relates to the technical field of screen printing equipment, and discloses a clamping device and a screen printing machine with the clamping device, the clamping device comprises a support, a first clamping mechanism and a second clamping mechanism, and the first clamping mechanism and the second clamping mechanism are both arranged on the support; the first clamping mechanism comprises a first linear driving mechanism, a fixed clamping plate and a movable clamping plate hinged to the fixed clamping plate, the first linear driving mechanism is hinged to the fixed clamping plate, and the output end of the first linear driving mechanism is hinged to the movable clamping plate through a swing arm; the first linear driving mechanism is used for driving the movable clamping plate and the fixed clamping plate to open and close to loosen and clamp one end of the workpiece; the second clamping mechanism and the first clamping mechanism are the same in structure, and the second clamping mechanism is used for clamping the other end of the workpiece. Under the action of the two first linear driving mechanisms, the movable clamping plates and the fixed clamping plates of the first clamping mechanism and the second clamping mechanism can be rapidly opened and closed so as to rapidly loosen and rapidly clamp a workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of screen printing equipment, and in particular to a clamping device and a screen printing machine. Background Art

[0002] As production requirements become increasingly higher, whether the clamping of workpieces on production lines or equipment is fast, convenient and reliable has become an important link that restricts production efficiency and quality. Ordinary clamping methods are generally manual operations, using tools or clamps for clamping, which are slow and unreliable, and the workpiece is prone to slipping. For vertical screen printing machines, the clamping device for clamping basic workpieces has a simple structure, low reliability, large size, and is prone to interference with external mechanisms, resulting in low clamping efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a clamping device which is small in size and can realize fast clamping and fast release of workpieces.

[0004] The present invention also provides a screen printing machine having the above-mentioned clamping device.

[0005] A clamping device according to an embodiment of the first aspect of the present invention includes a bracket, a first clamping mechanism and a second clamping mechanism, the first clamping mechanism and the second clamping mechanism are both arranged on the bracket, the first clamping mechanism includes a first linear drive mechanism, a fixed clamping plate and a movable clamping plate hinged to the fixed clamping plate, the first linear drive mechanism is hinged to the fixed clamping plate, the output end of the first linear drive mechanism is hinged to the movable clamping plate through a swing arm, the first linear drive mechanism is used to drive the movable clamping plate and the fixed clamping plate to open and close to loosen and clamp one end of the workpiece; the second clamping mechanism has the same structure as the first clamping mechanism, and the second clamping mechanism is used to clamp the other end of the workpiece.

[0006] At least the following beneficial effects are achieved:

[0007] Under the action of the two first linear drive mechanisms, the movable clamping plates of the first clamping mechanism and the second clamping mechanism and the fixed clamping plate can be opened and closed quickly, so the first clamping mechanism and the second clamping mechanism can quickly release and clamp the workpiece. In addition, the first linear drive mechanism and the swing arm drive movable clamping plate have a small structure volume, and the first linear drive mechanism can be set as close to the movable clamping plate / the fixed clamping plate as possible, so that the width of the first clamping mechanism and the second clamping mechanism can be small, which can be suitable for the small space between the two screen frames of the vertical screen printing machine, reducing the risk of interference with the screen frame and other parts of the screen printing machine.

[0008] According to some embodiments of the present invention, it further includes a second linear drive mechanism disposed on the bracket, wherein the second linear drive mechanism is used to adjust the distance between the first clamping mechanism and the second clamping mechanism.

[0009] According to some embodiments of the present invention, it also includes a sliding seat and a third linear drive mechanism arranged on the sliding seat, the output end of the second linear drive mechanism is connected to the sliding seat, the output end of the third linear drive mechanism is connected to the fixed clamping plate of the first clamping mechanism and / or the second clamping mechanism, and the third linear drive mechanism is used to drive the first clamping mechanism and the second clamping mechanism away from each other.

[0010] According to some embodiments of the present invention, the second linear drive mechanism includes a rotation drive mechanism and two screw pairs with identical structures, the screw pair includes a guide rod and a screw both rotatably arranged on the bracket, the guide rod and the screw are parallel to each other, a screw nut seat is provided on the screw, and the screw nut seat is slidably mounted on the guide rod, the sliding seat and the third linear drive mechanism are both two in number, the two sliding seats are respectively slidably mounted on the two guide rods and respectively connected to the two screw nut seats, the rotation drive mechanism is connected to the bracket, and the output end of the rotation drive mechanism is transmission-connected to the two screws to drive the two screws to rotate synchronously.

[0011] According to some embodiments of the present invention, the output end of the rotary drive mechanism is transmission-connected to one of the two lead screws via a belt, and the two lead screws are transmission-connected via a synchronous belt.

[0012] According to some embodiments of the present invention, a fourth linear drive mechanism is provided on the fixed splint, a sliding block is provided on the output end of the fourth linear drive mechanism, a first inclined surface is provided on the sliding block, a push block is provided on the movable splint, a second inclined surface is provided on the push block, the fourth linear drive mechanism drives the sliding block to move relative to the push block, and the first inclined surface abuts against the second inclined surface to lock the movable splint and the fixed splint together.

[0013] According to some embodiments of the present invention, the fixed splint is provided with an avoidance hole and a guide groove, the avoidance hole passes through two side surfaces of the fixed splint, the fourth linear drive mechanism is arranged in the avoidance hole, and the sliding block is arranged in the guide groove.

[0014] According to some embodiments of the present invention, the executing end of the fixed clamp and the executing end of the movable clamp are used to clamp the workpiece, and the executing ends of the fixed clamp and the movable clamp are both arc-shaped, and the distance between the executing ends of the fixed clamp and the movable clamp is smaller in an area closer to the workpiece.

[0015] According to some embodiments of the present invention, the fixed splint is hinged to the first linear drive mechanism via a connecting plate, and the first linear drive mechanism and the movable splint are respectively arranged on both sides of the fixed splint.

[0016] A screen printing machine according to a second embodiment of the present invention comprises a frame, a screen printing mechanism and a screen frame connecting mechanism all arranged on the frame, and a clamping device according to the first embodiment of the present invention.

[0017] At least the following beneficial effects are achieved:

[0018] The screen printing machine has all the beneficial effects brought by the clamping device of the above embodiment, which will not be described again.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 is a schematic cross-sectional structural diagram of a first clamping mechanism according to an embodiment of the present invention;

[0023] Figure 3 is a partial structural schematic diagram of a first clamping mechanism according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the first clamping mechanism after the cover plate is hidden in an embodiment of the present invention;

[0025] Figure 5 It is a structural schematic diagram of a first linear drive mechanism, a movable clamping plate, a swing arm, a fourth linear drive mechanism and a sliding block according to an embodiment of the present invention;

[0026] Figure 6 for Figure 5 A local enlarged schematic diagram of the middle A;

[0027] Figure Number:

[0028] Bracket 100;

[0029] The first clamping mechanism 200; the first linear drive mechanism 210; the fixed clamping plate 220; the avoidance hole 221; the guide groove 222; the connecting plate 223; the cover plate 224; the movable clamping plate 230; the swing arm 240;

[0030] A second clamping mechanism 300;

[0031] The second linear drive mechanism 400; the rotary drive mechanism 410; the guide rod 420; the lead screw 430; the lead screw nut seat 440; the belt 450; the synchronous belt 460; the tensioning wheel 470;

[0032] Sliding seat 500;

[0033] A third linear drive mechanism 600;

[0034] Fourth linear drive mechanism 700; sliding block 710; first inclined surface 711;

[0035] Push block 800; second inclined surface 810;

[0036] Hinge 900. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Reference Figure 1 The present invention discloses a clamping device, including a bracket 100 and a first clamping mechanism 200 and a second clamping mechanism 300 with the same structure. The first clamping mechanism 200 and the second clamping mechanism 300 are both arranged on the bracket 100, and the first clamping mechanism 200 and the second clamping mechanism 300 are respectively used to clamp two ends of a workpiece.

[0042] The bracket 100 is used to connect with an external device or mechanism;

[0043] Reference Figure 2 and Figure 3 The first clamping mechanism 200 includes a first linear drive mechanism 210, a fixed clamping plate 220 and a movable clamping plate 230 hinged on the fixed clamping plate 220. The first linear drive mechanism 210 is hinged to the fixed clamping plate 220. The output end of the first linear drive mechanism 210 is hinged to the movable clamping plate 230 through a swing arm 240. The first linear drive mechanism 210 is used to drive the movable clamping plate 230 to open and close with the fixed clamping plate 220 to loosen and clamp one end of the workpiece. The movable clamping plate 230 and the fixed clamping plate 220 are hinged to each other. The fixed clamping plate 220 forms a clamping mechanism. When the first linear drive mechanism 210 drives the movable clamping plate 230 and the fixed clamping plate 220 to open, a workpiece can be put between the movable clamping plate 230 and the fixed clamping plate 220 or taken out from between the movable clamping plate 230 and the fixed clamping plate 220. When the first linear drive mechanism 210 drives the movable clamping plate 230 and the fixed clamping plate 220 to close together, the movable clamping plate 230 and the fixed clamping plate 220 can open to clamp one end of the workpiece.

[0044] The second clamping mechanism 300 is used to clamp the other end of the workpiece.

[0045] Under the action of the two first linear drive mechanisms 210, the movable clamping plate 230 and the fixed clamping plate 220 of the first clamping mechanism 200 and the second clamping mechanism 300 can be opened and closed quickly, so the first clamping mechanism 200 and the second clamping mechanism 300 can quickly release and clamp the workpiece. In addition, the first linear drive mechanism 210 and the swing arm 240 drive the movable clamping plate 230 to have a relatively small structure volume, and the first linear drive mechanism 210 can be set as close to the movable clamping plate 230 / fixed clamping plate 220 as possible, so that the width of the first clamping mechanism 200 and the second clamping mechanism 300 can be relatively small, which can be applied to the smaller space between the two screen frames of a vertical screen printing machine, reducing the risk of interference with the screen frame and other parts of the screen printing machine.

[0046] Reference Figure 1 In some embodiments, a clamping device further includes a second linear drive mechanism 400 disposed on the bracket 100, and the first clamping mechanism 200 and / or the second clamping mechanism 300 can slide on the bracket 100. When the second linear drive mechanism 400 is working, the second linear drive mechanism 400 drives the first clamping mechanism 200 and / or the second clamping mechanism 300 to slide on the bracket 100, so as to adjust the distance between the first clamping mechanism 200 and the second clamping mechanism 300, so that the first clamping mechanism 200 and the second clamping mechanism 300 can clamp workpieces of different specifications and sizes.

[0047] Reference Figure 1In some of the embodiments, a clamping device also includes a sliding seat 500 and a third linear drive mechanism 600 arranged on the sliding seat 500, the output end of the second linear drive mechanism 400 is connected to the sliding seat 500, the output end of the third linear drive mechanism 600 is connected to the fixed clamping plate 220 of the first clamping mechanism 200 and / or the second clamping mechanism 300, and the second linear drive mechanism 400 drives the first clamping mechanism 200 and / or the second clamping mechanism 300 to move through the sliding seat 500 and the third linear drive mechanism 600, thereby adjusting the distance between the first clamping mechanism 200 and the second clamping mechanism 300.

[0048] Since the output end of the third linear drive mechanism 600 is connected to the fixed clamping plate 220 of the first clamping mechanism 200 and / or the second clamping mechanism 300, when the third linear drive mechanism 600 is working, the third linear drive mechanism 600 can drive the first clamping mechanism 200 or the second clamping mechanism 300 to move, and the third linear drive mechanism 600 drives the first clamping mechanism 200 and the second clamping mechanism 300 away from each other.

[0049] When the workpiece has been clamped by the first clamping mechanism 200 and the second clamping mechanism 300, the third linear drive mechanism 600 drives the first clamping mechanism 200 and the second clamping mechanism 300 to move away from each other. The first clamping mechanism 200 and the second clamping mechanism 300 can tension the workpiece to prevent the workpiece from being bent, thereby ensuring the effect of the screen printing machine on the workpiece, especially for thin-walled workpieces. The clamping device is in an upright state, and the first clamping mechanism 200 and the second clamping mechanism 300 are arranged one above and one below. The first clamping mechanism 200 and the second clamping mechanism 300 can make the thin-walled workpiece in a tensioned upright state.

[0050] The third linear drive mechanism 600 is a second cylinder.

[0051] Reference Figure 1 In this embodiment, the bracket 100 is arranged upright, the second clamping mechanism 300 is arranged above the first clamping mechanism 200, the output end of the third linear drive mechanism 600 is connected to the fixed clamping plate 220 of the second clamping mechanism 300, and the third linear drive mechanism 600 drives the second clamping mechanism 300 to rise and fall, thereby adjusting the distance between the first clamping mechanism 200 and the second clamping mechanism 300.

[0052] Reference Figure 1In some embodiments, the second linear drive mechanism 400 includes a rotation drive mechanism 410 and two screw pairs with the same structure. The screw pairs include a guide rod 420 and a screw 430 both rotatably arranged on the bracket 100. The guide rod 420 and the screw 430 are parallel to each other. A screw nut seat 440 is provided on the screw 430. The screw nut seat 440 is slidingly mounted on the guide rod 420. There are two sliding seats 500 and two third linear drive mechanisms 600. The two sliding seats 500 are respectively slidingly mounted on the two guide rods 420 and are respectively connected to the two screw nut seats 440. The rotation drive mechanism 410 is connected to the bracket 100. The output end of the rotation drive mechanism 410 is transmission-connected to the two screws 430 to drive the two screws 430 to rotate synchronously.

[0053] The support 100 supports the rotary drive mechanism 410, two guide rods 420 and two lead screws 430. When the rotary drive mechanism 410 is working, the rotary drive mechanism 410 drives the two lead screws 430 to rotate synchronously, and the two lead screws 430 respectively drive the two lead screw nut seats 440 to slide on the two guide rods 420 respectively, and the two lead screw nut seats 440 respectively drive the two sliding seats 500 to slide on the two guide rods 420, and the two lead screw nut seats 440 and the two sliding seats 500 achieve synchronous sliding, and the two sliding seats 500 drive the first clamping mechanism 200 and / or the second clamping mechanism 300 to move on the support 100 through the two third linear drive mechanisms 600.

[0054] In this embodiment, the output ends of the two third linear drive mechanisms 600 are respectively connected to the two ends of the fixed clamping plate 220 of the second clamping mechanism 300 to drive the second clamping mechanism 300 away from or close to the first clamping mechanism 200 .

[0055] Reference Figure 1 The bracket 100 is frame-shaped, and the two guide rods 420, the two lead screws 430, the first clamping mechanism 200 and the second clamping mechanism 300 are all arranged in the center hole of the bracket 100. The bracket 100 can play a certain protective role for the two guide rods 420, the two lead screws 430, the first clamping mechanism 200 and the second clamping mechanism 300.

[0056] The two guide rods 420 and the two lead screws 430 are vertically arranged.

[0057] Reference Figure 1 In some of the embodiments, the output end of the rotary drive mechanism 410 is connected to one of the two lead screws 430 via a belt 450, and the two lead screws 430 are connected via a synchronous belt 460, so that one rotary drive mechanism 410 drives the two lead screws 430 to rotate synchronously.

[0058] The second linear drive mechanism 400 further includes a tensioning wheel 470 disposed on the bracket 100 . The tensioning wheel 470 abuts against the synchronous belt 460 to tension the synchronous belt 460 . The tensioned synchronous belt 460 can ensure the precision of the synchronous rotation of the two lead screws 430 .

[0059] In another embodiment, the two lead screws 430 and the two guide rods 420 are both arranged vertically, the lead screw 430 can adopt a structure in which the thread directions at both ends are opposite, a lead screw nut seat 440 is provided on both ends of the lead screw 430, two sliding seats 500 are provided on the two lead screws 430, four lead screw nut seats 440 and four sliding seats 500 are arranged one by one, and a third linear drive mechanism 600 is provided on the four sliding seats 500, and the two ends of the fixed clamping plate 220 of the first clamping mechanism 200 are respectively connected to the output ends of the two third linear drive mechanisms 600 located below, The two ends of the fixed clamping plates 220 of the second clamping mechanisms 300 are respectively connected to the output ends of the two third linear drive mechanisms 600 located above. When the lead screw 430 rotates, the movement directions of the two lead screw nut seats 440 located above and the two lead screw nut seats 440 located below are opposite, so that the first clamping mechanism 200 and the second clamping mechanism 300 can move at the same time and the movement directions of the first clamping mechanism 200 and the second clamping mechanism 300 are opposite, that is, the first clamping mechanism 200 and the second clamping mechanism 300 can move closer to or away from each other.

[0060] Reference Figures 4 to 6 In some embodiments, a fourth linear drive mechanism 700 is provided on the fixed splint 220, a sliding block 710 is provided on the output end of the fourth linear drive mechanism 700, a first inclined surface 711 is provided on the sliding block 710, a push block 800 is provided on the movable splint 230, a second inclined surface 810 is provided on the push block 800, the fourth linear drive mechanism 700 drives the sliding block 710 to move relative to the push block 800, and the first inclined surface 711 abuts against the second inclined surface 810 to lock the movable splint 230 and the fixed splint 220 together.

[0061] When the movable clamp 230 rotates to press the workpiece against the fixed clamp 220, and the fixed clamp 220 and the movable clamp 230 clamp the workpiece, the fourth linear drive mechanism 700 drives the sliding block 710 to move relative to the push block 800, so that the first inclined surface 711 abuts against the second inclined surface 810. At this time, the first inclined surface 711 and the second inclined surface 810 form a self-locking, and the sliding block 710 drives the push block 800 and the movable clamp 230 to rotate through the first inclined surface 711 and the second inclined surface 810, thereby ensuring that the movable clamp 230 stably presses the workpiece against the fixed clamp 220, thereby ensuring the reliability of clamping the workpiece.

[0062] Since the first inclined surface 711 and the second inclined surface 810 are self-locking, that is, a dead angle is formed between the first inclined surface 711 and the second inclined surface 810, the first inclined surface 711 and the second inclined surface 810 cannot move relative to each other without external force. When the workpiece needs to be released, the fourth linear drive mechanism 700 first drives the sliding block 710 to move in the opposite direction relative to the push block 800, so that the first inclined surface 711 and the second inclined surface 810 are separated, that is, the self-locking is released, and then the first linear drive mechanism 210 drives the fixed clamping plate 220 and the movable clamping plate 230 to separate from each other.

[0063] It can be understood that the fixed clamping plate 220 and the movable clamping plate 230 are arranged one after the other, the length direction of the fixed clamping plate 220 and the movable clamping plate 230 is the left-right direction, and a plurality of push blocks 800 are arranged on the movable clamping plate 230 along the left-right direction, the number of the first inclined surfaces 711, the number of the push blocks 800, and the number of the second inclined surfaces 810 are equal, and the plurality of first inclined surfaces 711 and the plurality of second inclined surfaces 810 are arranged one-to-one. The plurality of push blocks 800, the plurality of second inclined surfaces 810, and the plurality of first inclined surfaces 711 can balance the forces in each area on the length square of the movable clamping plate 230, and ensure that each area of ​​the fixed clamping plate 220 and the movable clamping plate 230 can firmly clamp the workpiece.

[0064] Reference Figure 3 and Figure 4 In some of the embodiments, a avoidance hole 221 is provided on the fixed clamp plate 220, and the avoidance hole 221 passes through two side surfaces of the fixed clamp plate 220. The fourth linear drive mechanism 700 is provided in the avoidance hole 221. The avoidance hole 221 serves to accommodate the fourth linear drive mechanism 700, so that the width of the clamping device can be smaller.

[0065] It is understandable that the fourth linear drive mechanism 700 is a third cylinder. The driving direction of the fourth linear drive mechanism 700 is the left-right direction. The avoidance hole 221 penetrates the front and rear sides of the fixing clamp plate 220 .

[0066] Reference Figure 4 In some embodiments, the fixed clamp plate 220 is further provided with a guide groove 222, and the sliding block 710 is passed through the guide groove 222, and the guide groove 222 serves to guide the movement of the sliding block 710. It should be understood that the length direction of the guide groove 222 and the sliding block 710 is both the left-right direction.

[0067] Reference Figure 3 It can be understood that the fixed splint 220 is connected to an upper baffle and a lower baffle distributed up and down, and the upper baffle and the lower baffle are connected to a cover plate 224. The fixed splint 220, the upper baffle, the cover plate 224 and the lower baffle form a guide groove 222, and the sliding block 710 can be installed and removed by removing the cover plate 224.

[0068] Reference Figure 2 In some embodiments, the actuating end of the fixed clamp 220 and the actuating end of the movable clamp 230 are used to clamp the workpiece, and the actuating ends of the fixed clamp 220 and the movable clamp 230 are both arc-shaped, and the distance between the actuating ends of the fixed clamp 220 and the movable clamp 230 is smaller in an area closer to the workpiece.

[0069] The execution end of the fixed clamping plate 220 refers to the end of the fixed clamping plate 220 that contacts the workpiece, and the execution end of the movable clamping plate 230 refers to the end of the movable clamping plate 230 that contacts the workpiece.

[0070] The execution ends of the fixed splint 220 and the movable splint 230 are both arc-shaped, and the distance between the execution ends of the fixed splint 220 and the movable splint 230 is smaller the closer to the workpiece, which is beneficial for the scraper of the silk screen printing mechanism to press the silk screen of the screen frame against the area of ​​the workpiece close to the fixed splint 220 and the movable splint 230, avoiding the formation of dead corners in the area of ​​the workpiece close to the fixed splint 220 and the movable splint 230, thereby avoiding the situation of ink storage in the dead corners.

[0071] Reference Figures 2 to 5 In some embodiments, the fixed clamping plate 220 is hinged to the first linear drive mechanism 210 through a connecting plate 223. The first linear drive mechanism 210 and the movable clamping plate 230 are disposed on both sides of the fixed clamping plate 220, which is beneficial to reducing the width of the entire clamping device.

[0072] It can be understood that the third linear drive mechanism 600 is a first cylinder. One end of the swing arm 240 is fixedly connected to the execution end of the movable clamping plate 230, and the other end of the swing arm 240 is hinged to the output end of the first linear drive mechanism 210, and an acute angle is formed between the swing arm 240 and the movable clamping plate 230, so that the first linear drive mechanism 210 can drive the movable clamping plate 230 to rotate on the fixed clamping plate 220 through the swing arm 240.

[0073] Reference Figures 2 to 4 The fixed splint 220 is hinged to the movable splint 230 through a plurality of hinges 900, so that the movable splint 230 rotates on the fixed splint 220, that is, the movable splint 230 and the fixed splint 220 are opened and closed.

[0074] The invention discloses a screen printing machine, comprising a frame, a screen printing mechanism, a screen frame connecting mechanism and the above-mentioned clamping device, all of which are arranged on the frame. The screen frame connecting mechanism is used to fix the screen frame, and the screen printing mechanism cooperates with the screen frame to screen print the ink on the screen frame onto a workpiece on the clamping device.

[0075] The screen printing machine has all the beneficial effects brought by the clamping device of the above embodiment, which will not be described again.

[0076] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A clamping device, characterized in that: include: Bracket (100); A first clamping mechanism (200) is arranged on the bracket (100), the first clamping mechanism (200) comprises a first linear drive mechanism (210), a fixed clamping plate (220) and a movable clamping plate (230) hinged to the fixed clamping plate (220), the first linear drive mechanism (210) is hinged to the fixed clamping plate (220), an output end of the first linear drive mechanism (210) is hinged to the movable clamping plate (230) via a swing arm (240), and the first linear drive mechanism (210) is used to drive the movable clamping plate (230) and the fixed clamping plate (220) to open and close so as to loosen and clamp one end of a workpiece; The second clamping mechanism (300) has the same structure as the first clamping mechanism (200), and the second clamping mechanism (300) is used to clamp the other end of the workpiece.

2. A clamping device according to claim 1, characterized in that: It also includes a second linear drive mechanism (400) arranged on the bracket (100), wherein the second linear drive mechanism (400) is used to adjust the distance between the first clamping mechanism (200) and the second clamping mechanism (300).

3. A clamping device according to claim 2, characterized in that: It also includes a sliding seat (500) and a third linear drive mechanism (600) arranged on the sliding seat (500), the output end of the second linear drive mechanism (400) is connected to the sliding seat (500), the output end of the third linear drive mechanism (600) is connected to the fixed clamping plate (220) of the first clamping mechanism (200) and / or the second clamping mechanism (300), and the third linear drive mechanism (600) is used to drive the first clamping mechanism (200) and the second clamping mechanism (300) to move away from each other.

4. A clamping device according to claim 3, characterized in that: The second linear drive mechanism (400) comprises a rotary drive mechanism (410) and two screw pairs with the same structure, the screw pairs comprising a guide rod (420) and a screw (430) both rotatably arranged on the bracket (100), the guide rod (420) and the screw (430) being parallel to each other, a screw nut seat (440) being provided on the screw (430), the screw nut seat (440) being slidably sleeved on the guide rod (420), the sliding seat The number of the first linear drive mechanism (500) and the third linear drive mechanism (600) is two, the two sliding seats (500) are respectively slidably mounted on the two guide rods (420) and respectively connected to the two lead screw nut seats (440), the rotary drive mechanism (410) is connected to the bracket (100), and the output end of the rotary drive mechanism (410) is transmission-connected to the two lead screws (430) to drive the two lead screws (430) to rotate synchronously.

5. A clamping device according to claim 4, characterized in that: The output end of the rotary drive mechanism (410) is transmission-connected to one of the two lead screws (430) via a belt (450), and the two lead screws (430) are transmission-connected via a synchronous belt (460).

6. A clamping device according to claim 1, characterized in that: The fixed clamping plate (220) is provided with a fourth linear drive mechanism (700), and a sliding block (710) is provided on the output end of the fourth linear drive mechanism (700), and a first inclined surface (711) is provided on the sliding block (710); the movable clamping plate (230) is provided with a push block (800), and a second inclined surface (810) is provided on the push block (800); the fourth linear drive mechanism (700) drives the sliding block (710) to move relative to the push block (800), and the first inclined surface (711) abuts against the second inclined surface (810) to lock the movable clamping plate (230) and the fixed clamping plate (220) together.

7. A clamping device according to claim 6, characterized in that: The fixed clamping plate (220) is provided with an avoidance hole (221) and a guide groove (222), the avoidance hole (221) passes through two side surfaces of the fixed clamping plate (220), the fourth linear drive mechanism (700) is arranged in the avoidance hole (221), and the sliding block (710) is arranged in the guide groove (222).

8. A clamping device according to claim 1, characterized in that: The actuating end of the fixed clamp (220) and the actuating end of the movable clamp (230) are used to clamp the workpiece, and the actuating ends of the fixed clamp (220) and the movable clamp (230) are both arc-shaped, and the distance between the actuating ends of the fixed clamp (220) and the movable clamp (230) is smaller in an area closer to the workpiece.

9. A clamping device according to claim 1, characterized in that: The fixed clamping plate (220) is hinged to the first linear drive mechanism (210) via a connecting plate (223); the first linear drive mechanism (210) and the movable clamping plate (230) are respectively arranged on both sides of the fixed clamping plate (220).

10. Screen printing machine, characterized in that, It comprises a frame, a screen printing mechanism, a screen frame connecting mechanism and a clamping device according to any one of claims 1 to 9, all of which are arranged on the frame.

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