Film coating clamp and automatic clamping device

Abstract

The utility model discloses a film coating clamp and automatic clamping device, the film coating clamp comprises four elastic hanging mechanisms, every two elastic hanging mechanisms are respectively arranged on upper and lower opposite frames of a frame, each elastic hanging mechanism comprises a hook positioning part, a hook and a first elastic telescopic part, the hook positioning parts are movably arranged on the frames, and the first elastic telescopic part is arranged on the frame; the first elastic telescopic parts are limited between the frame and the hook positioning parts, the hooks are arranged on the hook positioning parts, when the hook positioning parts are driven to move, the first elastic telescopic parts are forced to contract, the distance between every two opposite hooks is reduced to the to-be-hung position, after the driving force is removed, the first elastic telescopic parts stretch, and the hooks are hung on the to-be-hung position. And the hook positioning parts are driven to move reversely, so that the distance between every two opposite hooks is increased to hang the processed object until the hung processed object is tensioned on the coating clamp to realize automatic clamping, and the completeness and quality of a coating film can be guaranteed.

Description

Technical Field

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

[0002] Metal bipolar plates have become one of the main components of proton exchange membrane fuel cell structures due to their good mechanical strength, processing performance and conductivity.

[0003] However, metal bipolar plates are also susceptible to corrosion in acidic and humid environments. Therefore, it is necessary to coat the surface of the metal bipolar plates to solve this problem. However, before coating, when clamping the metal bipolar plates, the following problems often occur:

[0004] (1) When four hooks are used to hang the upper and lower ends of the metal bipolar plate, since the hooks are the same size when customized and the positions of the hooks on the coating fixture are fixed before hanging, when the hooks are slightly deformed after repeated use (inevitable), one or two of the four hooks will have poor contact with the metal bipolar plate.

[0005] (2) The existing hooks are not strong enough and are easily deformed during use and maintenance, and the process stability is poor.

[0006] (3) Most existing hooks are of one-piece design, which not only easily interferes with surrounding structures when the hook is installed on the coating fixture, but also increases the cost of replacing the hook head after its service life expires.

[0007] (4) The existing clamping method is manual operation, the process stability is greatly affected by personnel, and the clamping efficiency is low.

[0008] Therefore, it is necessary to provide a new clamping technology to solve the above problems existing in the prior art. Utility Model Content

[0009] 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.

[0010] To achieve the above purpose, the technical solution of the utility model is as follows:

[0011] The utility model provides a coating fixture, comprising:

[0012] frame;

[0013] Four elastic hanging mechanisms are arranged in pairs on two upper and lower opposite frames of the frame, the elastic hanging mechanism comprises a hook positioning part, a hook and a first elastic telescopic part, the hook positioning part is movably arranged on the corresponding frame, the first elastic telescopic part is limited between the corresponding frame and the hook positioning part, the hook is arranged on the hook positioning part, and the hooks on the four elastic hanging mechanisms are arranged in pairs facing each other;

[0014] When the hook positioning parts on the four elastic hanging mechanisms are driven respectively, they move away from the corresponding frame, forcing the corresponding first elastic expansion part to contract, and reducing the distance between the hooks facing each other to the waiting position for hanging. After the driving force is removed, each first elastic expansion part stretches, driving the corresponding hook positioning part to move close to the corresponding frame, so that the distance between the hooks facing each other is increased for hanging and tensioning;

[0015] The hook positioning part includes a main body and a guide column connected to each other, the main body is located inside the frame, the hook is arranged on the main body, the guide column passes through the frame from the corresponding frame, a first cap portion is arranged on the passing end of the guide column, and the first elastic telescopic part is elastically sleeved on the guide column between the corresponding frame and the first cap portion;

[0016] The body is parallel to the corresponding frame, and one guide post is connected to each end of the body, each guide post vertically passes through the frame from the corresponding frame, and each guide post is elastically sleeved with the first elastic telescopic part;

[0017] The hook includes a cylindrical pin, a connecting rod and a hook head which are connected in sequence. A second cap portion is provided on the first end of the cylindrical pin, and the connecting rod is fastened to the second cap portion. A groove is provided on the top surface of the second cap portion, and a screw hole is provided on the bottom surface of the groove. The groove has a lateral opening on the top side of the second cap portion. The fastening end of the connecting rod is bent into an annular portion. By placing the annular portion into the groove, the rod body of the connecting rod is restricted by the lateral opening of the groove, and the annular portion is pressed by passing the screw through the annular hole of the annular portion and then screwing the screw into the screw hole, thereby fastening the connecting rod and the hook head connected to it to the cylindrical pin.

[0018] Furthermore, the outer cover of the first elastic telescopic part is provided with a cover body, the first end of the cover body is connected to the corresponding frame, the second end of the cover body is provided with a through hole, and the first cap part is exposed from the through hole.

[0019] Furthermore, a pin shaft is provided on the second end of the cylindrical pin, which passes through the cylindrical pin, and both ends of the pin shaft are exposed and protrude from the side surface of the cylindrical pin, a gasket is provided on the movable sleeve on the cylindrical pin between the second cap portion and the pin shaft, and a second elastic telescopic portion is provided on the movable sleeve on the cylindrical pin between the gasket and the second cap portion; a mounting hole is provided on the main body for the second end of the cylindrical pin to pass through, 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 passing of the second end of the cylindrical pin, the two avoidance holes correspond to the passing of the protruding two ends of the pin shaft, and two recessed grooves connected to the second direction side of the center hole are also provided on the surface of the main body located on the outlet side of the cylindrical pin, the two recessed grooves correspond to the position restriction of the protruding two ends of the pin shaft that pass through the mounting hole and elastically fall into them after rotating the cylindrical pin.

[0020] Furthermore, the shape of the hook head is a scimitar shape with multiple inflection points.

[0021] Furthermore, a rotating shaft is provided in the middle part of the two vertically opposite frame frames of the frame, and the rotating shaft serves as the rotation axis of the frame, and two elastic hanging mechanisms are symmetrically provided on both sides of each rotating shaft; and / or, a plurality of mounting holes are sequentially provided on the main body along the horizontal direction; and / or, the first elastic telescopic part and the second elastic telescopic part include springs.

[0022] The utility model also provides an automatic clamping device, comprising: a driving mechanism, a transmission mechanism, and the above-mentioned coating fixture;

[0023] The driving mechanism is used to drive the four hook positioning parts to move elastically away from the corresponding frame before hanging the processing object with the hanging structure hole, so that the distance between the hooks facing each other is reduced to the waiting position for hanging, and gradually remove the driving force after the hanging structure hole is aligned with each hook, so that the four hook positioning parts each move elastically close to the corresponding frame, so that the distance between the hooks facing each other is increased to hook the hanging structure hole, and until the processing object is gradually tightened on the coating fixture;

[0024] The conveying mechanism is used to convey the processing object to the clamping working surface of the coating fixture, align the hanging structure hole with each hook by moving, and release the processing object after the driving mechanism gradually removes the driving force so that each moving hook hooks the hanging structure hole.

[0025] Furthermore, the driving mechanism includes 4 cylinders or 4 electric push rods for driving the 4 hook positioning parts respectively; and / or the conveying mechanism includes a robot.

[0026] It can be seen from the above technical scheme that the utility model sets four elastic hanging mechanisms on two upper and lower opposite frames of the coating fixture frame. Before hanging the processing object with the hanging structure hole, the driving mechanism can drive the hook positioning parts with hooks on each elastic hanging mechanism to make elastic movements away from the corresponding frame, so that the distance between the hooks facing each other is reduced to the waiting position to be hung, so as to be suitable for the processing object transmitted by the hanging transmission mechanism, and gradually remove the driving force after the hanging structure holes are aligned with each hook, so that the hook positioning parts make elastic recovery movements close to the corresponding frame, so that the distance between the hooks facing each other is increased, and after the hooks hook the hanging structure holes, the processing object is gradually tightened on the coating fixture to realize automatic clamping. The utility model has the following advantages:

[0027] (1) By combining the coating fixture with the external drive mechanism and the transmission mechanism, efficient automatic clamping operation can be achieved when coating the object to be processed, thereby optimizing the clamping process cycle, streamlining manpower, and improving process stability and efficiency.

[0028] (2) By designing the hook head of the hook to be a scimitar shape with a narrow hooking surface, the hidden danger of insufficient strength when the hook is too thin is solved, and the risk of coating shielding when the hook is too thick is avoided.

[0029] (3) By adopting a detachable split design for the hook, the cylindrical pin serving as the loading and unloading structure can be separately installed on the hook positioning portion, and then the hook head can be installed on the cylindrical pin. This not only solves the problem of interference with surrounding structures during loading and unloading when using an integrated hook, but also allows only the hook head to be replaced after the life of the hook head expires, thereby greatly reducing the replacement cost of the hook.

[0030] (4) By adopting four independently driven and controlled elastic hanging mechanisms, the hook can make adaptive adjustments to the hooking position and angle during the elastic recovery movement of each hook positioning part, thereby compensating for slight deformation of the hook, thereby eliminating the hidden danger of poor contact between the hook and the processing object. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure is a schematic structural diagram of a coating fixture according to a preferred embodiment of the utility model.

[0032] Figure 2 The figure is a schematic diagram of the installation structure of an elastic hanging mechanism on the upper frame according to a preferred embodiment of the utility model.

[0033] Figure 3 The figure is a schematic diagram of the installation structure of an elastic hanging mechanism on the lower frame according to a preferred embodiment of the utility model.

[0034] Figure 4 The figure is a structural schematic diagram of a hook according to a preferred embodiment of the utility model.

[0035] Figure 5-Figure 6 The utility model is a schematic diagram of the installation structure of a hook on a hook positioning part according to a preferred embodiment of the utility model.

[0036] Figure 7 The figure is a schematic diagram of the installation process of a hook according to a preferred embodiment of the utility model.

[0037] Figure 8 The figure is a schematic diagram of a clamping process of a preferred embodiment of the utility model.

[0038] Fig. 9 Schematic diagram comparing the hooking effect of the utility model hook and the traditional hook, in which (a) is the traditional hook and (b) is the utility model hook. DETAILED DESCRIPTION

[0039] 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.

[0040] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0041] refer to Figure 1-Figure 3 The coating fixture of the utility model comprises a frame 10 and a plurality of elastic hanging mechanisms 11 arranged on the frame 10 .

[0042] 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 10) 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 10 ). Figure 1 The front state of the frame 10 is shown, that is, the clamping working surface state of the coating fixture is shown. The coating fixture is used to clamp the processing object that needs to be coated through the clamping working surface.

[0043] The frame 10 is provided with four elastic hanging mechanisms 11. The four elastic hanging mechanisms 11 are arranged on two upper and lower opposite frames of the frame 10 in pairs. The frame 10 is provided with an upper frame 102 and a lower frame 103; the upper frame 102 and the lower frame 103 are arranged on the upper and lower sides of the frame 10 in a vertically opposite manner. Two of the four elastic hanging mechanisms 11 are arranged on the upper frame 102 and are arranged on the left and right ends of the upper frame 102; the other two of the four elastic hanging mechanisms 11 are arranged on the lower frame 103 and are arranged on the left and right ends of the lower frame 103. Thus, the four elastic hanging mechanisms 11 are arranged on the upper and lower sides of the frame 10 in pairs in a vertically opposite manner. Figure 2 Two elastic hanging mechanisms 11 are shown on the upper frame 102. Figure 3 The other two elastic hanging mechanisms 11 disposed on the lower frame 103 are shown. The elastic hanging mechanism 11 located at the left end of the upper frame 102 and the elastic hanging mechanism 11 located at the left end of the lower frame 103 are disposed in pairs facing each other; the elastic hanging mechanism 11 located at the right end of the upper frame 102 and the elastic hanging mechanism 11 located at the right end of the lower frame 103 are disposed in pairs facing each other.

[0044] Each elastic hanging mechanism 11 includes a hook positioning portion 112, a hook 111 ( Figure 2 and Figure 3 Only the partial structure of the hook 111 is shown in the figure) and the first elastic telescopic part 113. Among them, the hook positioning part 112 is movably arranged on the corresponding frame, and the first elastic telescopic part 113 is limited between the corresponding frame and the hook positioning part 112. For example, the hook positioning part 112 of an elastic hanging mechanism 11 located on the left end of the upper frame 102 is arranged to pass through the upper frame 102, and forms a movable fit with the upper frame 102. One end of the first elastic telescopic part 113 is limited by the protruding end of the hook positioning part 112 (the hook positioning part 112 passes through the upper end of the upper frame 102), and the other end of the first elastic telescopic part 113 is limited by the upper frame 102, so that the first elastic telescopic part 113 is limited between the upper frame 102 and the hook positioning part 112. Please refer to the above description for understanding of the arrangement of the other three elastic hanging mechanisms 11 on the corresponding frames.

[0045] The hooks 111 are arranged on the hook positioning part 112. Moreover, the hooks 111 corresponding to the four elastic hanging mechanisms 11 are arranged in pairs facing each other. That is, the hook ends (hook heads) of the hooks 111 on the four elastic hanging mechanisms 11 are arranged in pairs facing each other. The hooks 111 are used to hang the processing object.

[0046] The processing object includes a plate-shaped processing object with a mounting structural hole. For example, the processing object includes a metal bipolar plate of a fuel cell, and the metal bipolar plate has a structural hole on its surface. The structural hole can be used to mount the metal bipolar plate through the hook 111. That is, the structural hole is used as the mounting structural hole when the metal bipolar plate is mounted and clamped. However, the processing object is not limited to the metal bipolar plate, and it can be any plate-shaped product that needs to be coated and has a mounting structural hole.

[0047] 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 hooks 111. However, the present invention is not limited thereto.

[0048] In order to facilitate the clear expression of the present invention, the following Figure 8 A metal bipolar plate 20 shown in FIG. 1 is taken as an example of a treatment object, and a coating fixture (frame 10) is in Figure 1 Taking the vertical hanging and clamping of the metal bipolar plate 20 in the vertical state as an example, the specific implementation mode of the present utility model is described in detail.

[0049] Taking the example that each elastic hanging mechanism 11 is provided with a hook positioning portion 112 and a hook 111, the hanging ends (hooks) of the four hooks 111 are arranged in pairs facing each other. That is, a hook 111 on the elastic hanging mechanism 11 located at the left end of the upper frame 102 and a hook 111 on the elastic hanging mechanism 11 located at the left end of the lower frame 103 are arranged in pairs facing each other; a hook 111 on the elastic hanging mechanism 11 located at the right end of the upper frame 102 and a hook 111 on the elastic hanging mechanism 11 located at the right end of the lower frame 103 are arranged in pairs facing each other. This arrangement makes it easy for the four hooks 111 to hang the upper edge of the upper hanging structure hole 201 and the lower edge of the lower hanging structure hole 201 of the metal bipolar plate 20, respectively.

[0050] Since the hook positioning parts 112 are movably arranged on the corresponding frame, when the hook positioning parts 112 on the four elastic hanging mechanisms 11 are driven by the driving force applied from the outside, they can move away from the corresponding frame. Figure 1 In the embodiment, the two hook positioning parts 112 located on the upper frame 102 are respectively subjected to driving forces from top to bottom (refer to Figure 8 (b) when driven by the hollow arrow pointing downward), each of them can move downward away from the upper frame 102; the two hook positioning parts 112 located on the lower frame 103 are respectively driven from bottom to top (refer to Figure 8When driven by the hollow arrow pointing upward in (b), each of them can move upward away from the lower frame 103.

[0051] At the same time, since the first elastic telescopic portion 113 is restricted between the corresponding frame and the hook positioning portion 112, when each hook positioning portion 112 moves away from the frame on the corresponding side, pressure is applied to the first elastic telescopic portion 113 and the reverse elastic force of the first elastic telescopic portion 113 is overcome, forcing the corresponding first elastic telescopic portion 113 to produce elastic contraction. As a result, after each hook positioning portion 112 moves relative to each other in pairs, the distance between the upper and lower hooks 111 facing each other is reduced to the position to be hung, so as to achieve the purpose of making the distance between the two hooks 111 facing each other 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 each hook positioning portion 112 is removed, each first elastic telescopic portion 113 will stretch under the action of its own elastic recovery, and exert a pulling effect on each hook positioning portion 112, so that the corresponding hook positioning portion 112 can be driven to move in the opposite direction close to the corresponding frame, so that the distance between the two facing hooks 111 is increased for hanging, and the purpose of elastically tensioning the metal bipolar plate 20 on the hanging area within the frame 10 is achieved after the four hooks 111 are hung on the metal bipolar plate 20.

[0053] In some embodiments, the frame 10 adopts a frame shape corresponding to the shape of the metal bipolar plate 20. Taking the metal bipolar plate 20 as a rectangular shape as an example, the frame 10 adopts 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 respectively located between the upper and lower ends of the two side frames 101 and horizontally opposite to each other. The four elastic hanging mechanisms 11 are respectively arranged at the four inner corners of the rectangular frame 10, and are arranged opposite to each other in pairs, such as Figure 1 shown.

[0054] refer to Figure 2-Figure 3 , which shows Figure 1The enlarged structure of the elastic hanging mechanism 11 in the middle. In some embodiments, each hook positioning portion 112 includes a connected body 114 and a guide column 115. Among them, the body 114 is located on the inner side of the frame 10 and is arranged parallel to the upper frame 102 (lower frame 103), and the hook 111 is installed on the body 114. The guide column 115 is vertically fastened to the body 114 and passes through the frame 10 from the corresponding upper frame 102 or lower frame 103. For example, the guide column 115 of the hook positioning portion 112 near the upper frame 102 vertically passes through the frame 10 from the inner side of the upper frame 102, and the guide column 115 of the hook positioning portion 112 near the lower frame 103 vertically passes through the frame 10 from the inner side of the lower frame 103. The upper frame 102 and the lower frame 103 are provided with through holes for the corresponding guide columns 115 to pass through.

[0055] In some embodiments, a threaded connection hole is provided on the body 114 , and a corresponding thread is provided on the connecting end of the guide column 115 . The guide column 115 is vertically fastened to the body 114 by screwing the connecting end of the guide column 115 into the threaded connection hole on the body 114 .

[0056] In some embodiments, the protruding end of the guide post 115 away from the connection end is a free end, and a first cap portion 116 (i.e., a nut) protruding laterally is provided on the protruding end of the guide post 115, and the first elastic telescopic portion 113 is elastically sleeved on the guide post 115 between the corresponding frame and the first cap portion 116. For example, the first elastic telescopic portion 113 sleeved on the guide post 115 passing through the upper frame 102 is elastically restricted between the first cap portion 116 at the protruding end of the guide post 115 and the outer side (upper side) of the upper frame 102, and the first elastic telescopic portion 113 sleeved on the guide post 115 passing through the lower frame 103 is elastically restricted between the first cap portion 116 at the protruding end of the guide post 115 and the outer side (lower side) of the lower frame 103. The frame 10 is in a relatively fixed state. When the body 114 near the upper frame 102 is pressed from above, the body 114 and the hook 111 installed thereon will fall, and the guide post 115 connected to the body 114 will follow the fall, so that the first elastic telescopic part 113 sleeved on the guide post 115 will shrink; after the pressing force is removed, the first elastic telescopic part 113 will elastically stretch upwards, and will push up the guide post 115, so that the body 114 and the hook 111 installed thereon will rise. Similarly, when the body 114 near the lower frame 103 is pressed from below, the body 114 and the hook 111 installed thereon will rise, and the guide post 115 connected to the body 114 will follow the rise, so that the first elastic telescopic part 113 sleeved on the guide post 115 will shrink; after the pushing force is removed, the first elastic telescopic part 113 will elastically stretch downwards, and will pull down the guide post 115, so that the body 114 and the hook 111 installed thereon will follow the fall. In this way, the four hooks 111 can be moved closer to each other in pairs as needed by applying a driving force, and the four hooks 111 can be moved away from each other in pairs by removing the applied driving force.

[0057] In some embodiments, the body 114 is in the form of a strip and is arranged parallel to the corresponding upper frame 102 or lower frame 103. A guide post 115 is vertically connected to each end of the strip of the body 114. Each guide post 115 vertically passes through the frame 10 from the corresponding frame. A first elastic telescopic portion 113 is elastically sleeved on each guide post 115, and each first elastic telescopic portion 113 is restricted between the first cap portion 116 of the corresponding guide post 115 and the outer side of the frame on the corresponding side. In this way, the body 114 can maintain balance and move smoothly when moving up and down, and can avoid the rotation of the body 114, thereby ensuring the consistency of the hanging position of the hook 111.

[0058] In some embodiments, the first elastic retractable portion 113 includes a spring.

[0059] In some embodiments, the outer cover of the first elastic telescopic portion 113 is provided with a cover body 117, which is used to protect the first elastic telescopic portion 113 during operation and prevent sand used in the maintenance process of the coating fixture from hitting the first elastic telescopic portion 113 and affecting its life. The first end of the cover body 117 is fixedly connected (for example, welded) to the frame on the corresponding side, and the second end of the cover body 117 surrounds at least part of the first cap portion 116. For example, the first cap portion 116 is partially located in the cover body 117, and the top surface of the first cap portion 116 is exposed from the cover body 117. Figure 2 Four covers 117 connected to the upper frame 102 are shown, wherein the first cover 117 and the third cover 117 from left to right are displayed in a half-section manner. Figure 3 Four covers 117 connected to the lower frame 103 are shown, and all of them are displayed in a half-cut manner.

[0060] In some embodiments, a through hole is provided on the second end of the cover body 117 to facilitate the discharge of foreign matter such as sand that enters the cover body 117. The first cap portion 116 can be inserted into the through hole on the second end of the cover body 117 and can be exposed from the through hole. The diameter of the through hole needs to be significantly larger than the diameter of the first cap portion 116 to facilitate the discharge of foreign matter such as sand that enters the cover body 117.

[0061] In some embodiments, a flat groove 118 is provided on the top surface of the first cap portion 116. Figure 2 and Figure 3 When installing the hook positioning part 112, the cover body 117 can be welded to the periphery of the through hole of the upper frame 102 or the lower frame 103 first, and then the connecting end of the guide column 115 with the spring (the first elastic telescopic part 113) is passed through the through hole of the upper frame 102 or the lower frame 103 and aligned with the threaded connection hole on the body 114. Then, a flat-head spanner can be used to cooperate with the flat groove 118 on the guide column 115 to screw the threaded connecting end of the guide column 115 into the threaded connection hole on the body 114, so that the guide column 115 is vertically fastened to the body 114, and the installed hook positioning part 112 is positioned (elastically positioned) on the corresponding upper frame 102 or the lower frame 103. In other embodiments, a cross slot or an inner hexagonal slot can also be provided on the top surface of the first cap part 116, and can be installed by a cross spanner or an outer hexagonal spanner.

[0062] In some embodiments, corner guards 104 are provided at the four inner corners of the frame to improve the structural stability of the frame.

[0063] refer to Figure 4-Figure 6 Combined with reference Figure 2-Figure 3In some embodiments, the hook 111 includes a cylindrical pin 123, a connecting rod 129 and a hook head 130 connected in sequence. The four hooks 111 installed on the four elastic hanging mechanisms 11 are arranged in pairs with the hook heads 130 facing each other. The hook heads 130 serve as the hanging ends of the hooks 111. Through the hook heads 130 of the four hooks 111, 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 can be hung respectively.

[0064] The first end of the cylindrical pin 123 is provided with a transversely protruding second cap portion 126, one end (fastening end) of the connecting rod 129 is fastened to the second cap portion 126, and the other end of the connecting rod 129 is connected to the hook head 130 (for example, welded or integrally formed). The second end of the cylindrical pin 123 is provided with a pin shaft 122 that crosses the cylindrical pin 123, and the pin shaft 122 is fixedly inserted into the cylindrical pin 123 (for example, the pin shaft 122 passes through the cylindrical pin 123 and is welded to the cylindrical pin 123), and both ends of the pin shaft 122 are exposed and protrude from the side of the cylindrical pin 123.

[0065] A washer 124 is movably mounted on the cylindrical pin 123 between the second cap 126 and the pin 122, and the washer 124 can move on the cylindrical pin 123 between the second cap 126 and the pin 122. A second elastic telescopic portion 125 is movably mounted on the cylindrical pin 123 between the washer 124 and the second cap 126. If the washer 124 is pushed toward the second cap 126, the second elastic telescopic portion 125 can be squeezed; when the washer 124 is released, the second elastic telescopic portion 125 is elastically stretched, and the washer 124 can be pushed back toward the pin 122.

[0066] In addition, a mounting hole 119 for the second end of the cylindrical pin 123 to pass through is provided on the side of the body 114. The mounting hole 119 has a center hole 121 and two avoidance holes 120 connected to the first direction (horizontal direction) side of the center hole 121. The center hole 121 is used for the elastic passing of the second end of the cylindrical pin 123, and the two avoidance holes 120 are used for the passing of the protruding ends of the pin shaft 122. The diameter of the gasket 124 is larger than the long diameter of the mounting hole 119 (or the diameter of the center hole 121). After the second end of the cylindrical pin 123 passes through the mounting hole 119, the gasket 124 is abutted against the front side of the body 114 on the side where the hook 111 is installed (the front side of the frame 10) by the elastic force of the second elastic telescopic part 125, so that the cylindrical pin 123 can elastically pass through the mounting hole 119, and the mounting hole 119 can block the gasket 124 outside the front side of the body 114.

[0067] Two recessed grooves 133 connected to the second direction (vertical direction) side of the center hole 121 are further provided on the back side of the body 114 located at the side where the cylindrical pin 123 passes through (the back side of the frame 10). The two recessed grooves 133 are used to positionally limit the protruding ends of the pin shaft 122 that passes through the mounting hole 119 and elastically falls into the pin shaft 122 after the cylindrical pin 123 is rotated. Figure 5 The figure shows the installation state of the hook 111 on the front side of the body 114 of the hook positioning part 112 after the hook 111 passes through the installation hole 119. Figure 6 The hook 111 is shown installed on the back of the body 114 of the hook positioning part 112 after passing through the installation hole 119. The protruding ends of the pin 122 are elastically inserted into the two recessed grooves 133, so that the hook 111 is oriented. In this way, the hook 111 is ensured not to rotate or fall out during use. Figure 5 and Figure 6 The main body 114 is shown with two threaded connection holes 132 for mounting the guide column 115 .

[0068] Depend on Figure 5 and Figure 6 It can be seen that after the hook 111 is installed, the second elastic retractable part 125 is in a forced contraction state, so that the hook 111 is pressed against the body 114; the gasket 124 plays the role of elastically blocking the hook head 130 on the loading side of the body 114. When the hook 111 is slightly deformed during use, the second elastic retractable part 125 is used to make the hook 111 have a certain elasticity, and cooperate with the elastic force of the first elastic retractable part 113, so that the hook 111 can obtain a leveraging effect when it is hung with the hanging structure hole 201 on the metal bipolar plate 20, that is, the hook 111 has an adaptive adjustment function, so that it can adapt well to the hanging surface, effectively improve the contact performance between the hook 111 and the metal bipolar plate 20, and thus ensure the coating quality. Therefore, by adopting four independently driven and controlled elastic hanging mechanisms 11, the initial hanging position and angle of each hook 111 can be independently adaptively adjusted through four independent hook positioning parts 112, and during the elastic recovery movement of each hook positioning part 112, the hook 111 can further adaptively adjust the hooking position and angle, thereby compensating for the slight deformation of the hook 111, thereby eliminating the hidden danger of poor contact between the hook 111 and the metal bipolar plate 20.

[0069] It should be noted that the second direction determines the hooking direction of the hook 111, and the second direction does not necessarily have to be arranged orthogonal to the first direction. Figure 1The state that the hook 111 is arranged in the vertical direction is shown in FIG. If the direction of the hook 111 needs to be tilted so as to adapt to the special hole shape of the hanging structure hole on some metal bipolar plates, the two sinks 133 can be adjusted accordingly to offset the vertical direction.

[0070] refer to Figure 4-Figure 5 and Figure 7 In some embodiments, a groove 134 is provided on the top surface of the second cap portion 126, a screw hole 135 is provided on the bottom surface of the groove 134, and the groove 134 has a lateral opening 127 on the top side of the second cap portion 126; and the fastening end of the connecting rod 129 is bent into a ring portion 131, such as Figure 7 (a) and Figure 7 (d) As shown. By placing the annular portion 131 into the groove 134 and allowing the rod body of the connecting rod 129 to fall into the lateral opening 127 of the groove 134, the connecting rod 129 is restricted in the lateral opening 127 of the groove 134, so that the hook head 130 connected to the connecting rod 129 cannot rotate; and then by passing the screw 128 through the ring hole of the annular portion 131 and screwing it into the screw hole 135 to press the annular portion 131 to form a crimping connection, the connecting rod 129 and the hook head 130 connected thereto can be fastened to the cylindrical pin 123, as shown in FIG. Figure 4 By adopting a detachable split design for the hook 111, the cylindrical pin 123 as the loading and unloading structure of the hook 111 can be separately installed on the body 114, and then the hook head 130 can be installed on the cylindrical pin 123, which solves the problem of interference with the hook positioning part and the frame during the loading and unloading process when the integrated hook is used in the past (the hook head and the cylindrical pin are generally welded together), and after the service life of the hook head 130 expires, only the hook head 130 with the connecting rod 129 can be replaced (the integrated hook needs to replace the entire hook including the cylindrical pin), thereby greatly reducing the replacement cost of the hook 111.

[0071] In some embodiments, the second elastic retractable portion 125 includes a spring.

[0072] Figure 7 The installation process of the hook 111 is fully demonstrated. First, the second end of the cylindrical pin 123, which has not yet been installed with the hook head 130, faces the installation hole 119 of the body 114 on the installation side, and the protruding direction of the pin shaft 122 on the cylindrical pin 123 is aligned with the direction of the avoidance holes 120 on both sides of the center hole 121, and the second end of the cylindrical pin 123 is ready to be inserted into the installation hole 119. Figure 7 Then, the second end of the cylindrical pin 123 is inserted into the mounting hole 119, and the gasket 124 is pressed against the mounting side of the body 114, as shown in FIG. Figure 7(b). At this time, the connecting direction of the two opposite lateral openings 127 on the top surface of the second cap portion 126 is consistent with the protruding direction of the pin shaft 122 and the connecting direction of the two avoidance holes 120 (the two opposite lateral openings 127 are opened on the side wall of the groove 134. The advantage is that when the cylindrical pin 123 is installed, it is not necessary to distinguish the direction, and only the protruding direction of the pin shaft 122 needs to be identified, so as to facilitate the installation of the annular portion 131 of the connecting rod 129 and improve efficiency). At the same time, it can be seen from the back of the body 114 that the protruding ends of the pin shaft 122 are also located in the avoidance holes 120, as shown in FIG. Figure 7 (f) As shown. Next, continue to press the cylindrical pin 123 into the mounting hole 119, squeeze the spring (the second elastic expansion part 125), so that the cylindrical pin 123 elastically enters the mounting hole 119, and the pin shaft 122 on the second end of the cylindrical pin 123 is completely extended from the back of the body 114 to the avoidance hole 120; then, by rotating the cylindrical pin 123 90 degrees, the connection direction of the two lateral openings 127 of the groove 134 on the top surface of the second cap part 126 is orthogonal to the connection direction of the two avoidance holes 120, as shown in FIG. Figure 7 As shown in (c), under the elastic pulling action of the spring, the two protruding ends of the pin shaft 122 are rotated into the corresponding side recessed groove 133, and continue to be pulled by the elastic force of the spring, and under the cooperation of the recessed groove 133 and the gasket 124, the two protruding ends of the pin shaft 122 are accurately positioned in the recessed groove 133. Figure 7 (g) The back of the body 114 shows the positioning state of the pin 122 in the recess 133. The cylindrical pin 123 is thus installed and positioned on the body 114. Next, the hook head 130 can be installed, including first placing the annular portion 131 of the connecting rod 129 into the recess 134, and allowing the rod body of the connecting rod 129 to fall into the lateral opening 127 on the corresponding side, as shown in FIG. Figure 7 (d) as shown; then, by screwing the screw 128 into the screw hole 135 to tighten the annular portion 131 and fix the connecting rod 129, the connecting rod 129 and the hook head 130 connected thereto can be installed on the cylindrical pin 123 to complete the installation of the hook 111 and the body 114 (hook positioning portion 112), as shown in FIG. Figure 7 (e) As shown in the front view of the hook 111 after installation, Figure 5 The back side of the hook 111 after installation is as shown in FIG. Figure 6 When the hook 111 is disassembled, only the reverse operation is required, which is convenient and quick.

[0073] The body 114 and the guide post 115 can be installed after the hook 111 is installed on the body 114. Alternatively, the body 114 and the guide post 115 can be installed on the corresponding frame first, and then the hook 111 can be installed on the body 114. Both methods can realize the installation of the elastic hanging mechanism 11 on the frame 10.

[0074] Combined with reference Figure 5 In some embodiments, the hook head 130 is shaped like a scimitar with multiple inflection points 136 (turning points). For example, the hook head 130 is shaped like a scimitar with a narrow hooking surface (blade surface) and has three inflection points 136 as shown, but is not limited thereto. Figure 5 Taking the direction as an example, the second inflection point 136 located in the middle is the lowest point on the hook head 130, that is, the hanging point.

[0075] In some embodiments, the scimitar-shaped hook head 130 is flat.

[0076] In some embodiments, the cross-sectional shape of the hook head 130 is a flat rectangle with rounded corners. Alternatively, the cross-sectional shape of the hook head 130 is a trapezoidal shape with a thickness gradually widening from the scimitar-shaped blade surface to the blade back direction (refer to the cross-sectional shape of a sickle), and each corner of the cross-sectional shape has rounded corners.

[0077] Fig. 9 The figure shows the comparison of the hooking effect of the hook 111 of the utility model and the traditional hook 1. Fig. 9 As shown in (a), the hook head of the conventional hook 1 usually adopts a circular cross-section with equal diameter, and the hooking point on the metal bipolar plate 20 is generally located at an inner corner of the mounting structure hole 201. Therefore, if the hook head of the conventional hook 1 is too thin, there will be a hidden danger of insufficient strength, and it is easy to deform during use and maintenance, resulting in poor process stability. If the hook head of the conventional hook 1 is too thick, it will occupy a large hooking area, causing the risk of coating shielding.

[0078] like Fig. 9 As shown in (b), the utility model designs the hook head 130 of the hook 111 to be a scimitar shape with a narrow hanging surface. Not only does it occupy a very small area of ​​the hanging point, successfully avoiding the risk of coating shielding, but it also utilizes the relatively wide width of the scimitar-shaped blade surface (the width between the blade surface and the blade back) to effectively improve the strength of the hook 111 itself and its hanging.

[0079] refer to Figure 1-Figure 3 In some embodiments, a rotating shaft is provided in the middle of the upper frame 102 and the middle of the lower frame 103 of the frame 10. Specifically, a first rotating shaft 12 is vertically provided in the middle of the upper frame 102, and a second rotating shaft 13 is vertically provided in the middle of the lower frame 103. The first rotating shaft 12 and the second rotating shaft 13 are coaxially arranged to form the rotating shaft of the frame 10. The first rotating shaft 12 and the second rotating shaft 13 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 13 play the role of conduction and positioning at the same time.

[0080] Two elastic hanging mechanisms 11 are symmetrically arranged on both sides of each rotating shaft. For example, two elastic hanging mechanisms 11 are symmetrically arranged on the upper frame 102 on both sides of the first rotating shaft 12, and another two elastic hanging mechanisms 11 are symmetrically arranged on the lower frame 103 on both sides of the second rotating shaft 13. The elastic hanging mechanisms 11 arranged on the upper frame 102 and the elastic hanging mechanisms 11 arranged on the lower frame 103 have the same composition structure, and the only difference is that, since the hook positioning part 112 of the elastic hanging mechanism 11 arranged on the upper frame 102 often requires a greater up-and-down movement stroke than the hook positioning part 112 of the elastic hanging mechanism 11 arranged on the lower frame 103, the length of the guide column 115 of the hook positioning part 112 arranged on the upper frame 102 is greater than the length of the guide column 115 of the hook positioning part 112 arranged on the lower frame 103, and the length of the spring sleeved on the two is also correspondingly arranged in a longer upper and shorter lower form.

[0081] refer to Figure 2-Figure 3 Combined with reference Figure 5-Figure 6 . In some embodiments, a plurality of mounting holes 119 are sequentially provided on the body 114 in the horizontal direction (for the convenience of processing, each mounting hole 119 can be connected through a respective avoidance hole 120, and a cross process hole not used for mounting the hook 111 is left on the outermost side). For a rectangular metal bipolar plate 20 of a certain size, four hooks 111 (two pairs of upper and lower ones) are generally used to hang the upper and lower four corners of the metal bipolar plate 20. By providing a plurality of mounting holes 119 on the body 114 of each hook positioning portion 112, the position of the hook 111 matched with the mounting hole 119 can be flexibly adjusted according to the size of different metal bipolar plates 20, etc., which is conducive to meeting the clamping requirements of metal bipolar plates 20 of various sizes.

[0082] The following is a specific implementation method with reference to the accompanying drawings ( Figure 1-Figure 8 ), an automatic clamping device of the utility model is further described in detail.

[0083] The utility model discloses an automatic clamping device, comprising a driving mechanism, a transmission mechanism, and the coating clamp of the utility model.

[0084] The driving mechanism is used to drive the four hook positioning parts 112 installed on the frame 10 to move before hanging the metal bipolar plate 20 with the hanging structure hole 201, forcing the corresponding first elastic expansion part 113 to contract, so that the four hook positioning parts 112 are elastically moved away from the frame on the corresponding side, so that the distance between the hooks 111 facing each other on the four hook positioning parts 112 is reduced to the waiting position for hanging, so as to be suitable for hanging the hanging structure hole 201 on the metal bipolar plate 20. After the hanging structure hole 201 on the metal bipolar plate 20 is aligned with each hook 111, the driving mechanism gradually removes the driving force, so that the four hook positioning parts 112 are elastically restored to the corresponding frame under the elastic extension of the corresponding first elastic expansion part 113, so that the distance between the hooks 111 facing each other is continuously increased, so as to hook the hanging structure hole, and until the metal bipolar plate 20 is gradually hooked (tensioned) on the frame 10 of the coating fixture.

[0085] The conveying mechanism is used to convey the metal bipolar plate 20 to the clamping working surface (front face of the frame 10) of the coating fixture, and align the mounting structure holes 201 on the metal bipolar plate 20 with the hooks 111 by moving (i.e., there is no substantial connection between the mounting structure holes 201 and the hooks 111). Also, after the driving mechanism gradually removes the driving force, so that all the hooks 111 moving away from each other hook the mounting structure holes 201 on the metal bipolar plate 20, the metal bipolar plate 20 is released, that is, the metal bipolar plate 20 is released from the conveying mechanism. Finally, each hook 111 will tighten the metal bipolar plate 20 on the frame 10 of the coating fixture, completing the automatic clamping process. After that, the coating fixture with the metal bipolar plate 20 can be sent into the coating equipment, and the clamped metal bipolar plate 20 can be subjected to the coating process.

[0086] Through similar reverse operation, 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.

[0087] In some embodiments, the driving mechanism includes four cylinders or four electric push rods for driving the four hook positioning parts 112 respectively.

[0088] In some embodiments, the transfer mechanism includes a robot.

[0089] Figure 8 The automatic clamping process is demonstrated. First, according to the size of the metal bipolar plate 20, the hooks 111 (4 pieces) are installed in the mounting holes 119 at appropriate positions on the coating fixture, and the frame 10 is vertically positioned on a clamping station (also a clamping station) equipped with, for example, 4 driving cylinders, with the front side (clamping working surface) facing the robot, as shown in FIG. Figure 8(a) shown.

[0090] Then, the four driving cylinders are started to push out the four hook positioning parts 112 respectively, so that the four hook positioning parts 112 move toward each other by a certain distance, so that the distance between the hooks 111 on the four hook positioning parts 112 is reduced to the waiting position, that is, the distance between the hooks 111 on the four hook positioning parts 112 is reduced to a suitable distance so that the four hooks 111 can be suspended and aligned with the four mounting structure holes 201 of the metal bipolar plate 20 at the same time, such as Figure 8 (b) shown.

[0091] Next, the robot transfers the metal bipolar plate 20 to the coating fixture so that the surface of the metal bipolar plate 20 is parallel to the clamping working surface of the frame 10. Figure 8 (c) shown.

[0092] Then, the manipulator moves forward to align the four mounting holes 201 on the metal bipolar plate 20 with the four hooks 111, respectively, until the plate surface of the metal bipolar plate 20 and the mounting points of the hook heads 130 of the four hooks 111 are in a coplanar alignment or approximately coplanar alignment state, such as Figure 8 (d). At this time, the four hooks 111 are all in a relaxed state. Then, the four driving cylinders are slowly retracted to slowly remove the driving force on the four hook positioning parts 112, so that the four hook positioning parts 112 move in pairs away from each other (automatically return to their positions). In this process, the four hooks 111 will gradually hook the corresponding hanging structure holes 201.

[0093] When the upper edges of the two hanging structure holes 201 above the metal bipolar plate 20 are hung on the two upper hooks 111, and the lower edges of the two hanging structure holes 201 below the metal bipolar plate 20 are also hung on the two lower hooks 111, the robot can release the metal bipolar plate 20. After that, the four hook positioning parts 112 continue to move up and down respectively, and the metal bipolar plate 20 is gradually hooked and tightened under the pull of the four hooks 111, as shown in FIG. Figure 8 (e) As shown. This enables automated rapid clamping.

[0094] In summary, the utility model can automatically and efficiently complete the clamping (unclamping) operation of the processing object (metal bipolar plate) by setting four elastic hanging mechanisms 11 in cooperation with the driving mechanism and the transmission mechanism, thereby realizing the process rhythm optimization, manpower streamlining and improvement of process stability, thereby improving production efficiency, eliminating the risk of coating shielding and the hidden danger of poor contact between the hook 111 and the product, and reducing the replacement cost of the hook 111.

[0095] The utility model can realize one-time double-sided coating of plate-shaped products such as metal bipolar plates, and can ensure the integrity and quality of the coating, and is suitable for promotion.

[0096] 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; Four elastic hanging mechanisms are arranged in pairs on two upper and lower opposite frames of the frame, the elastic hanging mechanism comprises a hook positioning part, a hook and a first elastic telescopic part, the hook positioning part is movably arranged on the corresponding frame, the first elastic telescopic part is limited between the corresponding frame and the hook positioning part, the hook is arranged on the hook positioning part, and the hooks on the four elastic hanging mechanisms are arranged in pairs facing each other; When the hook positioning parts on the four elastic hanging mechanisms are driven respectively, they move away from the corresponding frame, forcing the corresponding first elastic expansion part to contract, and reducing the distance between the hooks facing each other to the waiting position for hanging. After the driving force is removed, each first elastic expansion part stretches, driving the corresponding hook positioning part to move close to the corresponding frame, so that the distance between the hooks facing each other is increased for hanging and tensioning; The hook positioning part includes a main body and a guide column connected to each other, the main body is located inside the frame, the hook is arranged on the main body, the guide column passes through the frame from the corresponding frame, a first cap portion is arranged on the passing end of the guide column, and the first elastic telescopic part is elastically sleeved on the guide column between the corresponding frame and the first cap portion; The body is parallel to the corresponding frame, and one guide post is connected to each end of the body, each guide post vertically passes through the frame from the corresponding frame, and each guide post is elastically sleeved with the first elastic telescopic part; The hook includes a cylindrical pin, a connecting rod and a hook head which are connected in sequence. A second cap portion is provided on the first end of the cylindrical pin, and the connecting rod is fastened to the second cap portion. A groove is provided on the top surface of the second cap portion, and a screw hole is provided on the bottom surface of the groove. The groove has a lateral opening on the top side of the second cap portion. The fastening end of the connecting rod is bent into an annular portion. By placing the annular portion into the groove, the rod body of the connecting rod is restricted by the lateral opening of the groove, and the annular portion is pressed by passing the screw through the annular hole of the annular portion and then screwing the screw into the screw hole, thereby fastening the connecting rod and the hook head connected to it to the cylindrical pin.

2. The coating fixture according to claim 1, characterized in that: The outer cover of the first elastic telescopic part is provided with a cover body, a first end of the cover body is connected to the corresponding frame, a second end of the cover body is provided with a through hole, and the first cap part is exposed from the through hole.

3. The coating fixture according to claim 1, characterized in that: A pin shaft is provided on the second end of the cylindrical pin, which passes through the cylindrical pin, and two ends of the pin shaft are exposed and protrude from the side surface of the cylindrical pin. A gasket is provided on the movable sleeve on the cylindrical pin between the second cap portion and the pin shaft, and a second elastic telescopic portion is provided on the movable sleeve on the cylindrical pin between the gasket and the second cap portion; a mounting hole is provided on the main body for the second end of the cylindrical pin to pass through, and the mounting hole has a center hole and two avoidance holes connected to the first direction side of the center hole, and the center hole is used for the elastic passing of the second end of the cylindrical pin, and the two avoidance holes correspond to the passing of the protruding two ends of the pin shaft, and two recessed grooves connected to the second direction side of the center hole are also provided on the surface of the main body located on the outlet side of the cylindrical pin, and the two recessed grooves correspond to the position restriction of the protruding two ends of the pin shaft that pass through the mounting hole and elastically fall into them after rotating the cylindrical pin.

4. The coating fixture according to claim 1, characterized in that: The hook head is in the shape of a scimitar with multiple inflection points.

5. The coating fixture according to claim 3, characterized in that: A rotating shaft is provided in the middle part of the two vertically opposite frame frames of the frame, and the rotating shaft serves as the rotation axis of the frame. Two elastic hanging mechanisms are symmetrically provided on both sides of each rotating shaft; and / or, a plurality of mounting holes are sequentially provided on the main body along the horizontal direction; and / or, the first elastic telescopic part and the second elastic telescopic part include springs.

6. An automatic 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 5; The driving mechanism is used to drive the four hook positioning parts to move elastically away from the corresponding frame before hanging the processing object with the hanging structure hole, so that the distance between the hooks facing each other is reduced to the waiting position for hanging, and gradually remove the driving force after the hanging structure hole is aligned with each hook, so that the four hook positioning parts each move elastically close to the corresponding frame, so that the distance between the hooks facing each other is increased to hook 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, align the hanging structure hole with each hook by moving, and release the processing object after the driving mechanism gradually removes the driving force so that each moving hook hooks the hanging structure hole.

7. The automatic clamping device according to claim 6, characterized in that: The driving mechanism includes 4 cylinders or 4 electric push rods, which are used to drive the 4 hook positioning parts respectively; and / or the conveying mechanism includes a robot.

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