Film coating clamp and automatic clamping device

Abstract

The utility model discloses a film coating clamp and an automatic clamping device. The film coating clamp comprises an elastic mechanism arranged on a frame, and the elastic mechanism is provided with a first elastic part; the first positioning part is fixedly arranged on the frame, and the second positioning part is movably arranged on the elastic mechanism and abuts against the first elastic part; the first hanging part and the second hanging part are respectively arranged on the first positioning part and the second positioning part and are oppositely arranged; when driven by the driving mechanism, the second positioning part moves close to the first positioning part to force the first elastic part to contract, so that the distance between the second hooking part and the first hooking part is reduced to a to-be-hung position so as to hang a processed object conveyed by the conveying mechanism, and after the driving force is removed, the first elastic part stretches to enable the processed object to be hung on the to-be-hung position. And the second positioning part is driven to move away from the first positioning part, so that the distance between the second hanging part and the first hanging part is increased to hang the processed object until the hung processed object is tensioned on the coating clamp to realize automatic clamping.

Description

Technical Field

[0001] The utility model relates to the technical field of coating processing, in particular to a coating fixture and an automatic clamping device. Background Art

[0002] Bipolar plates are one of the main components of the proton exchange membrane fuel cell structure. Compared with graphite and composite bipolar plates, metal bipolar plates have good mechanical strength, processing performance and conductivity. Especially considering the transportation scenario, metal bipolar plates are more resistant to mechanical shock and vibration caused by reaction gas rupture and leakage. In addition, metal bipolar plates reduce manufacturing costs with their low-cost advantage, which improves the competitiveness of metal bipolar plates in the fuel cell market.

[0003] However, metal bipolar plates are susceptible to corrosion in acidic and humid environments, which will reduce the power output of the fuel cell and greatly reduce the efficiency of the fuel cell.

[0004] The above problems can be effectively solved by coating the surface of the metal bipolar plate. However, when clamping the metal bipolar plate for coating, the following problems often occur:

[0005] (1) When using the existing coating fixture to load and unload the metal bipolar plate, it is a manual operation and the process stability is greatly affected by the personnel.

[0006] (2) The traditional coating fixture used for metal bipolar plates has low clamping efficiency.

[0007] Therefore, it is necessary to provide a new clamping technology to solve the above problems existing in the prior art. Utility Model Content

[0008] The purpose of the utility model is to overcome the above-mentioned defects in the prior art and provide a coating fixture and an automatic clamping device.

[0009] To achieve the above purpose, the technical solution of the utility model is as follows:

[0010] The utility model provides a coating fixture, comprising:

[0011] frame;

[0012] An elastic mechanism is arranged on the frame, and the elastic mechanism is provided with a first elastic part;

[0013] A first positioning portion and a second positioning portion are arranged opposite to each other, wherein the first positioning portion is fixedly arranged on the frame, and the second positioning portion is movably arranged on the elastic mechanism and contacts the first elastic portion;

[0014] The first hanging part and the second hanging part are respectively arranged on the first positioning part and the second positioning part and are arranged facing each other;

[0015] When the second positioning portion is driven, it moves close to the first positioning portion, forcing the first elastic portion to contract, so that the distance between the second hanging portion and the first hanging portion is reduced to a waiting position for hanging. After the driving force is removed, the first elastic portion stretches, driving the second positioning portion to move away from the first positioning portion, so that the distance between the second hanging portion and the first hanging portion is increased to hang and tension.

[0016] The first hanging part and the second hanging part include a hook, and the hook includes a connected cylindrical pin and a hook head. A second cap is provided on the first end of the cylindrical pin, and the hook head is connected to the second cap. A pin shaft is provided on the second end of the cylindrical pin, and both ends of the pin shaft are exposed and protrude from the side of the cylindrical pin. A gasket is provided on the movable sleeve of the cylindrical pin between the second cap and the pin shaft, and a second elastic part is provided on the movable sleeve of the cylindrical pin between the gasket and the second cap. The first positioning part and the second positioning part are respectively provided with a second end for the second end of the cylindrical pin to pass through. A mounting hole, wherein the mounting hole has a center hole and two avoidance holes connected to the first direction side of the center hole, the center hole is used for the elastic passage of the second end of the cylindrical pin, and the two avoidance holes correspond to the passage of the protruding two ends of the pin shaft, and a second limiting portion is also provided on the surface of the first positioning portion and the surface of the second positioning portion located on the passing-out side of the cylindrical pin, and the second limiting portion includes two recessed grooves connected to the second direction side of the center hole, and the two recessed grooves correspond to positionally limit the protruding two ends of the pin shaft that pass through the mounting hole and elastically fall therein after the cylindrical pin is rotated.

[0017] Furthermore, the frame includes two opposite side frames and an upper frame and a lower frame located between the two side frames, the two elastic mechanisms are respectively arranged on the two side frames, the elastic mechanism is provided with a guide column arranged in the same direction as the side frames, the first end of the guide column is movable through the second positioning portion and then connected to the upper frame, the second end of the guide column is provided with a first cap portion, the first elastic portion is sleeved on the guide column between the second positioning portion and the first cap portion, and elastically contacts the second positioning portion.

[0018] Furthermore, a first limiting portion is provided on the frame between the second positioning portion and the upper frame, for limiting a travel of the second positioning portion when moving away from the first positioning portion.

[0019] Furthermore, the upper frame is the first limiting portion.

[0020] Furthermore, the outer cover of the first elastic part is provided with a protective cover, the first end of the protective cover is connected to the second positioning part, the second end of the protective cover surrounds the first cap part, and the second end of the protective cover is provided with a through hole.

[0021] Furthermore, the lower frame is the first positioning portion.

[0022] Furthermore, a first rotating shaft is provided on the middle part of the upper frame, and a second rotating shaft is provided on the middle part of the lower frame, the first rotating shaft and the second rotating shaft constitute the rotating shaft of the frame, the mounting holes are arranged on both sides of the rotating shaft, and one or more pairs are arranged on the first positioning part and the second positioning part on any side of the rotating shaft, wherein the setting directions of the avoidance holes on any two of the mounting holes on the first positioning part or the second positioning part located on both sides of the rotating shaft are the same or different; and / or the first elastic part and the second elastic part include springs.

[0023] The utility model also provides an automated clamping device, comprising: a driving mechanism, a transmission mechanism, and the above-mentioned coating fixture;

[0024] The driving mechanism is used to drive the second positioning part to move close to the first positioning part before hanging the processing object with the hanging structure hole, forcing the first elastic part to contract, so that the distance between the second hanging part and the first hanging part is reduced to a waiting hanging position, and after the hanging structure hole is aligned with the second hanging part and the first hanging part, and the first hanging part is hung on the hanging structure hole, gradually remove the driving force, so that the second positioning part moves away from the first positioning part under the elastic extension of the first elastic part, so that the distance between the second hanging part and the first hanging part gradually increases, so that the second hanging part and the first hanging part both hang the hanging structure hole, and until the processing object is gradually tightened on the coating fixture;

[0025] The conveying mechanism is used to convey the processing object to the clamping working surface of the coating fixture, so that the hanging structure hole is aligned with the second hanging part and the first hanging part in the hanging position, and the hanging structure hole is hung on the first hanging part by moving, and after the driving mechanism gradually removes the driving force so that the moving second hanging part also hangs on the hanging structure hole, the processing object is released.

[0026] Furthermore, the driving mechanism includes a cylinder or an electric push rod, and the transmission mechanism includes a robot.

[0027] It can be seen from the above technical scheme that the utility model fixes one of the two positioning parts (first hanging part and second hanging part) for installing the hanging part by setting an elastic mechanism on the frame of the coating fixture, and the other second positioning part is elastically connected to the elastic mechanism, so that when the second positioning part is driven by the driving mechanism, it can move close to the first positioning part, and force the elastic mechanism (first elastic part) to contract, so that the distance between the second hanging part and the first hanging part is reduced to the waiting hanging position, so as to be suitable for hanging the processing object transmitted by the conveying mechanism, and after removing the driving force applied to the second positioning part, the second positioning part can be driven by the extension of the first elastic part to move away from the first positioning part, so that the distance between the second hanging part and the first hanging part is increased to hang the processing object, and until the hung processing object is tensioned on the coating fixture to achieve automatic clamping. The utility model has the following advantages:

[0028] (1) By setting up an elastic mechanism in coordination with a driving mechanism and a conveying mechanism, the positioning, clamping and releasing operations of the processing object (such as a metal bipolar plate) during clamping can be automatically and quickly completed, reducing manual participation, thereby realizing automated clamping and greatly improving the clamping efficiency and process stability, thereby improving production efficiency.

[0029] (2) By providing a plurality of pairs of mounting holes on the first positioning portion and the second positioning portion, the positions of the hooks matched with the mounting holes can be flexibly adjusted according to the size of the processing object, etc., which is conducive to meeting the clamping requirements of processing objects of various sizes.

[0030] (3) By setting a recessed groove at the mounting hole on the side where the hook passes through, the position of the pin on the hook is restricted. The elastic force of the spring on the hook and the rotation of the cylindrical pin can be used to achieve the installation positioning of the hook, and the hook can be quickly disassembled and assembled.

[0031] (4) The time taken for manual clamping using existing fixtures is generally more than 40 to 50 seconds, while the clamping time taken by the utility model is only 15 to 20 seconds, which is efficient and time-saving, and can achieve one-time coating on both sides of the treatment object (such as metal bipolar plates), and can ensure the integrity and quality of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The figure is a front structural schematic diagram of a coating fixture according to a preferred embodiment of the utility model.

[0033] Figure 2 The figure is a schematic diagram of the back structure of a coating fixture according to a preferred embodiment of the utility model.

[0034] Figure 3 The figure is a schematic side structural diagram of a coating fixture according to a preferred embodiment of the utility model.

[0035] Figure 4 The figure is a schematic structural diagram of an elastic mechanism according to a preferred embodiment of the utility model.

[0036] Figure 5 The figure is a schematic diagram of the installation and positioning state of a hook according to a preferred embodiment of the utility model.

[0037] Figure 6 The figure is a structural schematic diagram of a hook according to a preferred embodiment of the utility model.

[0038] Figure 7 The figure is a schematic diagram of the installation process of a hook according to a preferred embodiment of the utility model.

[0039] Figure 8 The figure is a schematic diagram of a clamping process of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the utility model belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0041] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0042] refer to Figure 1-Figure 4 The coating fixture of the utility model comprises a frame 10 , an elastic mechanism 11 , a positioning portion 13 and a hanging portion 14 .

[0043] The coating fixture has a clamping working surface and a clamping back surface. Figure 1 The side of the middle frame 10 facing the drawing (front side of the frame) is clamped on the back side. Figure 1 The side of the middle frame 10 facing away from the drawing (the back side of the frame). Alternatively, the clamping working surface is Figure 2 The side of the middle frame 10 facing away from the drawing is clamped on the back side. Figure 2 The middle frame 10 faces the drawing. Figure 1 and Figure 2The front and back states of the frame 10 are shown respectively, that is, the clamping working surface and the clamping back surface states of the coating fixture are shown respectively.

[0044] The elastic mechanism 11 is arranged on the frame 10. Preferably, the elastic mechanism 11 is arranged on the reverse side (the clamping reverse side) of the frame 10 to avoid interference with the clamping.

[0045] Furthermore, the elastic mechanism 11 is provided with a first elastic portion 111, such as Figure 4 shown.

[0046] The positioning portion 13 includes a first positioning portion 131 and a second positioning portion 132 which are relatively arranged on the frame 10. The first positioning portion 131 is fixedly arranged on the frame 10, and the second positioning portion 132 is movably arranged on the elastic mechanism 11, that is, the second positioning portion 132 is movably arranged on the frame 10. Moreover, the second positioning portion 132 is arranged to be in conflict with the first elastic portion 111.

[0047] The hanging part 14 is used to hang the processing object. The processing object includes a plate-shaped processing object with a hanging structural hole, but is not limited thereto. For example, the processing object includes a metal bipolar plate of a fuel cell, and the surface of the metal bipolar plate has a structural hole. The structural hole can be used to hang the metal bipolar plate through the hanging part 14. That is, the structural hole is used as the hanging structural hole when hanging and clamping the metal bipolar plate.

[0048] Figure 8 An example of a metal bipolar plate 20 is shown, and a plurality of structural holes are provided on the surface of the metal bipolar plate 20, wherein two structural holes located at the top and two structural holes located at the bottom can be used as mounting structural holes 201 for mounting with the mounting portion 14. However, the present invention is not limited thereto.

[0049] In order to facilitate the clear expression of the present invention, the following Figure 8 Taking a metal bipolar plate 20 shown in the figure as an example of a processing object, and taking the coating fixture (frame 10) being in a vertical state to hang and clamp the metal bipolar plate 20 in a vertical direction as an example, the specific implementation method of the utility model is described in detail.

[0050] The hanging part 14 includes a first hanging part 141 and a second hanging part 142. The first hanging part 141 is arranged on the first positioning part 131, and the second hanging part 142 is arranged on the second positioning part 132, and the working end (hanging end) of the first hanging part 141 and the working end (hanging end) of the second hanging part 142 are arranged facing each other, so as to facilitate hanging the lower edge of the lower hanging structure hole 201 of the metal bipolar plate 20 and the upper edge of the upper hanging structure hole 201 respectively.

[0051] Since the second positioning portion 132 is movably disposed on the elastic mechanism 11, when the second positioning portion 132 is driven by a driving force applied from the outside, for example, Figure 1 is driven from top to bottom (cf. Figure 8 When driven by the second positioning portion 132 (in the direction indicated by the hollow arrow in (b)), it can move downward relative to the frame 10, that is, it can move close to the first positioning portion 131. At the same time, since the second positioning portion 132 is arranged to conflict with the first elastic portion 111, when the second positioning portion 132 moves downward, it will exert downward pressure on the first elastic portion 111 and overcome the reverse elastic force of the first elastic portion 111, forcing the first elastic portion 111 to undergo elastic contraction, so that the distance between the second hanging portion 142 and the first hanging portion 141 is reduced to the waiting hanging position, so as to achieve the purpose of making the second hanging portion 142 and the first hanging portion 141 suitable for hanging with the hanging structure hole 201 on the metal bipolar plate 20.

[0052] On the contrary, when the driving force applied to the second positioning portion 132 is removed, the first elastic portion 111 will overcome the gravity of the second positioning portion 132 and produce reverse elastic recovery and stretch, so that the second positioning portion 132 can be lifted up and driven to move the second positioning portion 132 away from the first positioning portion 131, so that the distance between the second hanging portion 142 and the first hanging portion 141 is increased for hanging, and after the metal bipolar plate 20 is hung, the second hanging portion 142 and the first hanging portion 141 can elastically tension the metal bipolar plate 20 on the hanging area within the frame 10.

[0053] In some embodiments, the frame 10 is in a frame shape corresponding to the shape of the metal bipolar plate 20. Taking the metal bipolar plate 20 as a rectangular shape, the frame 10 is a rectangular frame 10. The rectangular frame 10 includes two vertically opposite side frames 101 and an upper frame 102 and a lower frame 103 that are respectively located between the upper and lower ends of the two side frames 101 and are horizontally opposite to each other. Figure 1 and Figure 2 shown.

[0054] In some embodiments, two elastic mechanisms 11 are provided. Furthermore, the two elastic mechanisms 11 are provided on two side frames 101 and are provided close to the upper frame 102 to ensure the clamping height of the metal bipolar plate 20 .

[0055] refer to Figure 3 and Figure 4In some embodiments, each elastic mechanism 11 is provided with a guide column 112 arranged in the same direction as the side frame 101, and a first elastic portion 111. The upper end (first end) of the guide column 112 is connected to the upper frame 102 after being movable through the through hole provided on the second positioning portion 132; the lower end (second end) of the guide column 112 is provided with a first cap portion 114, the diameter of the first cap portion 114 is larger than the diameter of the guide column 112, and the first elastic portion 111 is sleeved on the guide column 112 between the second positioning portion 132 and the first cap portion 114, and elastically conflicts with the second positioning portion 132 and the first cap portion 114. When the second positioning portion 132 is driven by a driving force from top to bottom, it will move downward along the guide column 112 and exert a squeezing force on the upper end of the first elastic portion 111, while the lower end of the first elastic portion 111 is restricted by the first cap portion 114, so that the first elastic portion 111 can be forced to elastically contract as the distance between the second positioning portion 132 and the first cap portion 114 gradually decreases. When the driving force applied to the second positioning portion 132 is removed, the reverse elastic recovery and stretching generated by the first elastic portion 111 are used to lift up the second positioning portion 132, so that the second positioning portion 132 moves upward along the guide column 112 and resets. Figure 3 The second positioning portion 132 is shown in the state where it is pressed and moved down to the ready-to-hang position (the guide post 112 can be seen exposed between the second positioning portion 132 and the upper frame 102). Figure 4 The diagram shows a state where the second positioning portion 132 is elastically lifted up by the first elastic portion 111 and then moves upward to the initial position (reset).

[0056] In some embodiments, the upper end of the guide post 112 is connected to the bottom surface of the upper frame 102 by a threaded connection, and is vertically installed on the bottom surface of the upper frame 102 to facilitate disassembly and assembly of the elastic mechanism 11 .

[0057] In some embodiments, the first elastic portion 111 includes a spring.

[0058] In some embodiments, a first limiting portion is disposed on the frame 10 between the second positioning portion 132 and the upper frame 102. The first limiting portion is used to limit the travel of the second positioning portion 132 when moving away from the first positioning portion 131.

[0059] In some embodiments, the upper frame 102 serves as the first limiting portion. In the initial state, the second positioning portion 132 is elastically supported by the first elastic portion 111 and abuts against the bottom surface of the upper frame 102; when ready for hanging, the second positioning portion 132 is driven downward and moves downward, such as Figure 3 When the downward driving force is lost, the second positioning portion 132 is lifted by the first elastic portion 111 and again contacts the bottom surface of the upper frame 102 to reset, as shown Figure 4 shown.

[0060] In some embodiments, the outer cover of the first elastic part 111 is provided with a protective cover 113 to prevent sand used in the maintenance process of the coating fixture from hitting the first elastic part 111 and affecting its life. The upper end (first end) of the protective cover 113 is fixedly connected (for example, welded) to the bottom surface of the second positioning part 132, and the lower end (second end) of the protective cover 113 surrounds at least part of the first cap part 114.

[0061] In some embodiments, a through hole is provided on the lower end of the protective cover 113 to facilitate the discharge of foreign matter such as sand that enters the protective cover 113. The first cap portion 114 can be inserted into the through hole on the lower end of the protective cover 113, and the diameter of the through hole needs to be significantly larger than the diameter of the first cap portion 114 to facilitate the discharge of foreign matter such as sand that enters the protective cover 113.

[0062] In some embodiments, the lower frame 103 also serves as the first positioning portion 131. Figure 1-Figure 2 shown.

[0063] In some embodiments, the second positioning portion 132 includes a positioning rod. The positioning rod is movably disposed on the guide pillars 112 of the two elastic mechanisms 11 through two ends.

[0064] In some embodiments, the first hanging portion 141 and the second hanging portion 142 include a hook 15. The first positioning portion 131 and the second positioning portion 132 are provided with mounting holes 16 for mounting the hook 15 on their sides.

[0065] Combined with reference Figure 5-Figure 7 . In some embodiments, the hook 15 includes a connected cylindrical pin 152 and a hook head 154, and the hook 15 on the first positioning portion 131 and the hook 15 on the second positioning portion 132 are arranged facing each other with their respective hook heads 154. The hook head 154 serves as the hanging end of the hook 15, and is used to hang the lower edge of the lower hanging structure hole 201 and the upper edge of the upper hanging structure hole 201 of the metal bipolar plate 20 respectively. A second cap portion 153 is provided on the first end of the cylindrical pin 152, and the hook head 154 is connected to the second cap portion 153. For example, the hook head 154 is welded in the wire groove at the top of the second cap portion 153. A pin shaft 151 is provided on the second end of the cylindrical pin 152 and passes through the cylindrical pin 152. The pin shaft 151 is fixedly inserted into the cylindrical pin 152 (for example, the pin shaft 151 passes through the cylindrical pin 152 and is welded on the cylindrical pin 152), and both ends of the pin shaft 151 are exposed and protrude from the side of the cylindrical pin 152. A gasket 156 is movably sleeved on the cylindrical pin 152 between the second cap portion 153 and the pin shaft 151. The gasket 156 can move on the cylindrical pin 152 between the second cap portion 153 and the pin shaft 151. A second elastic portion 155 is movably sleeved on the cylindrical pin 152 between the gasket 156 and the second cap portion 153.

[0066] Furthermore, mounting holes 16 for the second end of the cylindrical pin 152 to pass through are respectively provided on the side surfaces of the first positioning portion 131 and the second positioning portion 132 . Figure 5 A setting structure of the mounting hole 16 on the second positioning portion 132 is shown. The mounting hole 16 has a central hole 161 and two avoidance holes 162 connected to the first direction side of the central hole 161 (taking the mounting hole 16 located on the right side of the second positioning portion 132 as an example, the first direction is the horizontal direction, and taking the mounting hole 16 located on the left side of the second positioning portion 132 as an example, the first direction is the oblique right upper and left lower directions). Among them, the central hole 161 is used for the elastic passage of the second end of the cylindrical pin 152, and the two avoidance holes 162 are used for the passage of the protruding ends of the pin shaft 151. The diameter of the gasket 156 is larger than the long diameter of the mounting hole 16. After the second end of the cylindrical pin 152 passes through the mounting hole 16, the gasket 156 is abutted against the front side of the second positioning portion 132 (first positioning portion 131) on the loading side (front side of the frame) of the hook 15 by the elastic force of the second elastic portion 155, so that the cylindrical pin 152 can elastically pass through the mounting hole 16.

[0067] A second limiting portion is also provided on the back of the first positioning portion 131 and the back of the second positioning portion 132 located on the side where the cylindrical pin 152 passes through (the back side of the frame). The second limiting portion includes two recessed grooves 163 connected to the center hole 161 on the second direction (the second direction needs to form a certain rotation angle with the first direction, and the rotation angle is preferably 90 degrees. Taking the mounting hole 16 located on the right side of the second positioning portion 132 as an example, the first direction is the horizontal direction, and the second direction corresponds to the vertical direction. For example, taking the mounting hole 16 located on the left side of the second positioning portion 132 as an example, the first direction is obliquely to the upper right and lower left directions, and the second direction corresponds to the obliquely to the upper left and lower right directions). The two recessed grooves 163 are used to limit the positions of the protruding ends of the pin shaft 151 that pass through the mounting hole 16 and elastically fall into it after rotating the cylindrical pin 152.

[0068] Figure 7 The installation process of the hook 15 is demonstrated. First, align the protruding direction of the pin shaft 151 on the hook 15 with the direction of the avoidance hole 162 on the installation hole 16 on the loading side. Figure 7 Then, the second end of the cylindrical pin 152 is inserted into the mounting hole 16, as shown in FIG. Figure 7 Then, by squeezing the second elastic portion 155, the cylindrical pin 152 is further inserted into the mounting hole 16, and the pin shaft 151 on the second end of the cylindrical pin 152 is completely extended out of the avoidance hole 162, as shown in FIG. Figure 7Finally, by rotating the cylindrical pin 152, and under the elastic force of the second elastic part 155, the two protruding ends of the pin shaft 151 are turned into the corresponding side of the sink groove 163, and under the elastic force of the second elastic part 155, and under the cooperation of the sink groove 163 and the gasket 156, the two protruding ends of the pin shaft 151 are accurately positioned in the sink groove 163, so that the hook 15 is stably installed on the first positioning part 131 and the second positioning part 132, as shown in FIG. Figure 7 (d) As shown. The back side of the hook 15 after installation is as follows Figure 5 When the hook 15 is disassembled, only the reverse operation is required, which is convenient and quick.

[0069] In some embodiments, the second elastic portion 155 includes a spring.

[0070] refer to Figure 1-Figure 3 In some embodiments, a first rotating shaft 12 is vertically disposed on the middle of the upper frame 102, and a second rotating shaft 17 is vertically disposed on the middle of the lower frame 103. The first rotating shaft 12 and the second rotating shaft 17 constitute the rotating shaft of the frame 10. The first rotating shaft 12 and the second rotating shaft 17 are used to be installed and matched with the rotating frame in the coating equipment, so that the frame 10 of the coating fixture can revolve with the rotating frame and rotate relative to the rotating frame. During coating, the first rotating shaft 12 and the second rotating shaft 17 play the role of conducting electricity and positioning at the same time.

[0071] refer to Figure 1 , Figure 2 and Figure 5 In some embodiments, the mounting holes 16 are arranged on both sides of the rotation axis of the frame 10 (i.e., the mounting holes 16 are respectively located on the first positioning portion 131 and the second positioning portion 132 on both sides of the first rotation axis 12 and the second rotation axis 17), and one or more pairs of mounting holes 16 are arranged in pairs on the first positioning portion 131 and the second positioning portion 132 on either side of the rotation axis. For example, Figure 1 exemplarily shows that 4 pairs of mounting holes 16 are arranged in pairs on the first positioning portion 131 and the second positioning portion 132 on the right side of the rotating shaft, and another 4 pairs of mounting holes 16 are arranged in pairs on the first positioning portion 131 and the second positioning portion 132 on the left side of the rotating shaft. Among them, for a rectangular metal bipolar plate 20 of a certain size, 4 hooks 15 (2 pairs on the upper and lower sides) are generally used to hang the upper and lower four corners of the metal bipolar plate 20. By providing multiple pairs of mounting holes 16 on the first positioning portion 131 and the second positioning portion 132, the position of the hook 15 matched with the mounting hole 16 can be flexibly adjusted according to the size of the metal bipolar plate 20, etc., which is conducive to meeting the clamping requirements of metal bipolar plates 20 of various sizes.

[0072] In some embodiments, the avoidance holes 162 on any two mounting holes 16 on the first positioning portion 131 or the second positioning portion 132 on both sides of the rotation axis are arranged in the same direction. For example, the avoidance holes 162 on any two mounting holes 16 on the first positioning portion 131 or the second positioning portion 132 on both sides of the rotation axis are arranged in the horizontal direction (not shown).

[0073] In some embodiments, the avoidance holes 162 on any two mounting holes 16 on the first positioning portion 131 or the second positioning portion 132 on both sides of the rotation axis are arranged in different directions. For example, when viewed from the back of the frame 10, the avoidance hole 162 on any mounting hole 16 on the second positioning portion 132 on the right side of the rotation axis is arranged in a horizontal direction, and the avoidance hole 162 on any mounting hole 16 on the second positioning portion 132 on the left side of the rotation axis is arranged in an oblique direction to the upper right and lower left directions, such as Figure 2 and Figure 5 shown.

[0074] Furthermore, the avoidance holes 162 on any pair of mounting holes 16 on the first positioning portion 131 and the second positioning portion 132 are arranged in different directions. For example, when viewed from the back of the frame 10, among any pair of mounting holes 16, the avoidance holes 162 on any one mounting hole 16 on the second positioning portion 132 on the right side of the rotation axis are arranged in a horizontal direction, while the avoidance holes 162 on the other paired mounting hole 16 on the first positioning portion 131 on the right side of the rotation axis are arranged in an oblique direction to the upper right and lower left direction; similarly, the avoidance holes 162 on any one mounting hole 16 on the second positioning portion 132 on the left side of the rotation axis are arranged in an oblique direction to the upper right and lower left direction, while the avoidance holes 162 on the other paired mounting hole 16 on the first positioning portion 131 on the left side of the rotation axis are arranged in a horizontal direction, as shown in FIG. Figure 2 and Figure 5 shown.

[0075] Correspondingly, when the setting direction of the avoidance hole 162 on the above-mentioned mounting hole 16 is horizontal, the direction of the hook 15 installed on the mounting hole 16 is vertical (in the same direction as the side frame 101); when the setting direction of the avoidance hole 162 on the above-mentioned mounting hole 16 is obliquely toward the upper right and lower left directions, the direction of the hook 15 installed on the mounting hole 16 is obliquely toward the upper left and lower right directions, such as Figure 2 and Figure 5 shown.

[0076] The avoidance holes 162 on the mounting holes 16 are arranged in various directions in order to adapt to the shape and position of the hanging structure hole 201 on the metal bipolar plate 20, so that after hanging, when the hook 15 generates tension on the metal bipolar plate 20, it is ensured that the metal bipolar plate 20 is subjected to a relatively uniform force, while also avoiding applying obvious torque to the hook 15, so that after clamping, the metal bipolar plate 20 can be hung more evenly in the hanging area within the frame 10.

[0077] The utility model discloses an automatic clamping device, which comprises a driving mechanism, a transmission mechanism and the coating fixture of the utility model.

[0078] The driving mechanism is used to automatically apply pressure to and release pressure on the second positioning portion 132 on the coating fixture. The conveying mechanism is used to automatically convey the metal bipolar plate 20 when clamping (or unclamping).

[0079] Specifically, the driving mechanism is used to drive the second positioning portion 132 on the frame 10 to move close to the first positioning portion 131 before hanging the metal bipolar plate 20 with the hanging structure hole 201, forcing the first elastic portion 111 on the elastic mechanism 11 to contract, so that the distance between the hook 15 (second hanging portion 142) on the second positioning portion 132 and the hook 15 (first hanging portion 141) on the first positioning portion 131 is reduced to a position to be hung. The hanging structure hole 201 on the metal bipolar plate 20 is aligned with the hook 15 on the second positioning part 132 and the hook 15 on the first positioning part 131, and after the hook 15 on the first positioning part 131 is hung on the hanging structure hole 201, the driving mechanism gradually removes the driving force, so that the second positioning part 132 is driven by the elastic extension of the first elastic part 111 to move away from the first positioning part 131, so that the distance between the hook 15 on the second positioning part 132 and the hook 15 on the first positioning part 131 gradually increases, so that the hook 15 on the second positioning part 132 and the hook 15 on the first positioning part 131 hang the hanging structure hole 201 on the metal bipolar plate 20, and as the second positioning part 132 continues to move, the metal bipolar plate 20 is gradually tightened on the frame 10 of the coating fixture.

[0080] The conveying mechanism is used to convey the metal bipolar plate 20 to the clamping working surface of the coating fixture (the front side of the frame 10), so that the hanging structure hole 201 on the metal bipolar plate 20 is aligned with the hook 15 on the second positioning part 132 and the hook 15 on the first positioning part 131 after the distance is close, that is, the hook 15 on the second positioning part 132 and the hook 15 on the first positioning part 131 in the hanging position are aligned with the hanging structure hole 201 on the metal bipolar plate 20. The conveying mechanism adjusts the relative position of the metal bipolar plate 20 by moving, so that the hanging structure hole 201 of the metal bipolar plate 20 is hung on the hook 15 on the first positioning part 131, and after the driving mechanism gradually removes the driving force, so that the hook 15 on the moving second positioning part 132 also hangs on the hanging structure hole 201 of the metal bipolar plate 20, the metal bipolar plate 20 is released from the conveying mechanism, so that the second positioning part 132 continues to move away from the first positioning part 131 under the elastic extension of the first elastic part 111, and drives the metal bipolar plate 20 to be gradually tightened. After that, the coating fixture with the metal bipolar plate 20 can be sent to the coating equipment, and the clamped metal bipolar plate 20 is subjected to the coating process.

[0081] Through similar reverse operations, the metal bipolar plate 20 that has been taken out of the furnace after coating can be automatically unclamped from the coating fixture. That is, the above-mentioned automatic clamping device of the utility model also serves as an automatic unclamping device.

[0082] In some embodiments, the drive mechanism includes a pneumatic cylinder or an electric push rod.

[0083] In some embodiments, the transfer mechanism includes a robot.

[0084] Figure 8 The automated clamping process is demonstrated. First, according to the size of the metal bipolar plate 20, four hooks 15 are installed in the appropriately located mounting holes 16 on the coating fixture, and the frame 10 is placed vertically under the driving cylinder with the front side (clamping working surface) facing the robot, as shown in FIG. Figure 8 (a) shown.

[0085] Then, the cylinder is started to press down the second positioning part 132, so that the second positioning part 132 moves downward by a certain distance, so that the distance between the hook 15 on the second positioning part 132 and the hook 15 on the first positioning part 131 is reduced to the waiting position, that is, the distance between the hook 15 on the second positioning part 132 and the hook 15 on the first positioning part 131 is reduced to a suitable distance so that the four hooks 15 can be suspended in the air at the same time and aligned with the four mounting structure holes 201 of the metal bipolar plate 20, such as Figure 8 (b) shown.

[0086] Next, the robot transfers the metal bipolar plate 20 to the coating fixture, such as Figure 8 (c) shown.

[0087] Then, the manipulator moves forward to align the metal bipolar plate 20 with the four hooks 15 through each mounting structure hole 201, as shown in FIG. Figure 8 (d) At this time, the four hooks 15 are all in a relaxed state.

[0088] Next, the manipulator moves upward to adjust the relative position of the metal bipolar plate 20, so that the lower edges of the two mounting structure holes 201 below the metal bipolar plate 20 are hung on the hooks 15 on the first positioning portion 131, as shown in FIG. Figure 8 (e) shows that the two hooks 15 on the upper second positioning portion 132 are still in a relaxed state.

[0089] At this time, the cylinder slowly releases the squeezing force on the second positioning part 132, so that the second positioning part 132 gradually moves upward under the action of the spring force of the elastic mechanism 11. When the hook 15 on the moving second positioning part 132 hooks the upper edges of the two hanging structure holes 201 above the metal bipolar plate 20, the manipulator can release the metal bipolar plate 20. After that, the second positioning part 132 continues to move upward, and the metal bipolar plate 20 is gradually tightened between the four hooks 15 driven by the two hooks 15 on the moving second positioning part 132, as shown in FIG. Figure 8 As shown in (f), the second positioning portion 132 will eventually abut against the upper frame 102 to obtain reset support, thereby achieving automatic rapid clamping.

[0090] In summary, the utility model can automatically and quickly complete the positioning, clamping and releasing operations of the metal bipolar plate 20 during clamping by setting the elastic mechanism 11 in cooperation with the driving mechanism and the transmission mechanism, thereby reducing manual participation, thereby realizing automated clamping, and greatly improving the clamping efficiency and process stability, thereby improving production efficiency.

[0091] The clamping time when using the utility model only takes 15 to 20 seconds, which is efficient and time-saving. The utility model can realize one-time coating of both sides of the metal bipolar plate 20, for example, and can ensure the integrity and quality of the coating.

[0092] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A coating fixture, characterized in that: include: frame; An elastic mechanism is arranged on the frame, and the elastic mechanism is provided with a first elastic part; A first positioning portion and a second positioning portion are arranged opposite to each other, wherein the first positioning portion is fixedly arranged on the frame, and the second positioning portion is movably arranged on the elastic mechanism and contacts the first elastic portion; The first hanging part and the second hanging part are respectively arranged on the first positioning part and the second positioning part and are arranged facing each other; When the second positioning portion is driven, it moves close to the first positioning portion, forcing the first elastic portion to contract, so that the distance between the second hanging portion and the first hanging portion is reduced to a waiting position for hanging. After the driving force is removed, the first elastic portion stretches, driving the second positioning portion to move away from the first positioning portion, so that the distance between the second hanging portion and the first hanging portion is increased to hang and tension. The first hanging part and the second hanging part include a hook, and the hook includes a connected cylindrical pin and a hook head. A second cap is provided on the first end of the cylindrical pin, and the hook head is connected to the second cap. A pin shaft is provided on the second end of the cylindrical pin, and both ends of the pin shaft are exposed and protrude from the side of the cylindrical pin. A gasket is provided on the movable sleeve of the cylindrical pin between the second cap and the pin shaft, and a second elastic part is provided on the movable sleeve of the cylindrical pin between the gasket and the second cap. The first positioning part and the second positioning part are respectively provided with a second end for the second end of the cylindrical pin to pass through. A mounting hole, wherein the mounting hole comprises a center hole and two avoidance holes connected to the first direction side of the center hole, the center hole is used for the elastic passage of the second end of the cylindrical pin, the two avoidance holes correspond to the passage of the protruding two ends of the pin shaft, and a second limiting portion is further provided on the surface of the first positioning portion and the surface of the second positioning portion located on the passing-out side of the cylindrical pin, the second limiting portion comprises two sunken grooves connected to the second direction side of the center hole, the two sunken grooves correspond to positionally limit the protruding two ends of the pin shaft that pass through the mounting hole and elastically fall therein after the cylindrical pin is rotated; The frame includes two opposite side frames and an upper frame and a lower frame located between the two side frames. The two elastic mechanisms are respectively arranged on the two side frames. The elastic mechanism is provided with a guide column arranged in the same direction as the side frames. The first end of the guide column is connected to the upper frame after moving through the second positioning portion. The second end of the guide column is provided with a first cap portion. The first elastic portion is sleeved on the guide column between the second positioning portion and the first cap portion, and elastically contacts the second positioning portion.

2. The coating fixture according to claim 1, characterized in that: A first limiting portion is provided on the frame between the second positioning portion and the upper frame, for limiting the travel of the second positioning portion when moving away from the first positioning portion.

3. The coating fixture according to claim 2, characterized in that: The upper frame is the first limiting portion.

4. The coating fixture according to claim 1, characterized in that: The outer cover of the first elastic part is provided with a protective cover, the first end of the protective cover is connected to the second positioning part, the second end of the protective cover surrounds the first cap part, and the second end of the protective cover is provided with a through hole.

5. The coating fixture according to claim 1, characterized in that: The lower frame is the first positioning portion.

6. The coating fixture according to claim 1, characterized in that: A first rotating shaft is provided on the middle part of the upper frame, and a second rotating shaft is provided on the middle part of the lower frame, the first rotating shaft and the second rotating shaft constitute the rotating shaft of the frame, the mounting holes are arranged on both sides of the rotating shaft, and one or more pairs are arranged on the first positioning part and the second positioning part on any one side of the rotating shaft, wherein the setting directions of the avoidance holes on any two of the mounting holes on the first positioning part or the second positioning part located on both sides of the rotating shaft are the same or different; and / or the first elastic part and the second elastic part include springs.

7. An automated clamping device, characterized in that: include: A driving mechanism, a transmission mechanism, and a coating fixture as described in any one of claims 1 to 6; The driving mechanism is used to drive the second positioning part to move close to the first positioning part before hanging the processing object with the hanging structure hole, forcing the first elastic part to contract, so that the distance between the second hanging part and the first hanging part is reduced to a waiting hanging position, and after the hanging structure hole is aligned with the second hanging part and the first hanging part, and the first hanging part is hung on the hanging structure hole, gradually remove the driving force, so that the second positioning part moves away from the first positioning part under the elastic extension of the first elastic part, so that the distance between the second hanging part and the first hanging part gradually increases, so that the second hanging part and the first hanging part both hang the hanging structure hole, and until the processing object is gradually tightened on the coating fixture; The conveying mechanism is used to convey the processing object to the clamping working surface of the coating fixture, so that the hanging structure hole is aligned with the second hanging part and the first hanging part in the hanging position, and the hanging structure hole is hung on the first hanging part by moving, and after the driving mechanism gradually removes the driving force so that the moving second hanging part also hangs on the hanging structure hole, the processing object is released.

8. The automated clamping device according to claim 7, characterized in that: The driving mechanism includes a cylinder or an electric push rod, and the transmission mechanism includes a robot.

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