Edge covering wheel

Abstract

The utility model discloses an edge covering wheel which comprises a wheel body, a glue overflowing cavity is formed in the wheel body, an edge covering groove is formed in the peripheral face of the wheel body, the glue overflowing cavity is communicated with the edge covering groove through a glue overflowing hole, and a glue collecting groove body used for collecting edge covering glue flowing out of the edge covering groove is further formed in the peripheral face of the wheel body. A glue return channel and a glue return cavity are arranged in the wheel main body, the glue return cavity is communicated with the glue overflow cavity, and the glue return channel is respectively communicated with the glue collecting groove body and the glue return cavity; the glue returning piston is movably matched in the glue returning cavity and is suitable for driving the edge covering glue in the glue returning cavity to enter the glue overflowing cavity; and the piston driving device is in transmission connection with the glue return piston. According to the edge covering wheel, the edge covering rubber can be recycled, and the edge covering wheel has the advantages of being low in use cost, not prone to leakage, high in reliability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell sheet manufacturing, in particular to an edge wrapping wheel. Background Art

[0002] The battery cells need to be edge-wrapped before electroplating.

[0003] The hemming equipment uses an hemming wheel to move along the edge of the battery cell to perform hemming. The hemming glue is injected into the hemming wheel through the glue injection tube and enters the hemming groove through the glue overflow hole for hemming. During the hemming process, excess glue falls into the glue receiving tray under the hemming wheel and is then recovered into the waste glue barrel by the peristaltic pump. Finally, it is filtered and the viscosity is adjusted before being injected into the hemming wheel.

[0004] In the related art, the hemming equipment uses a peristaltic pump to squeeze the rubber tube through the rotor to make the glue flow. The rubber tube is prone to corrosion and solidification after contacting the hemming glue, which causes the rubber tube in the rotor extrusion part to leak easily. Moreover, since the peristaltic pump drives the glue by squeezing the rubber tube, the glue solidification is likely to hinder the flow of glue and cause blockage. When the blockage is serious, it will hinder the glue feeding and cause the glue to overflow from the glue receiving tray. On the one hand, the hemming glue is wasted, and on the other hand, the leaked and overflowing hemming glue will pollute the working environment. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an edge wrapping wheel, which can recycle the edge wrapping glue and has the advantages of low use cost, low leakage, high reliability, etc.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the utility model, a hemming wheel is proposed, the hemming wheel comprising: a wheel body, a glue overflow cavity provided in the wheel body, a hemming groove provided on the outer peripheral surface of the wheel body, the glue overflow cavity and the hemming groove being connected through a glue overflow hole, the peripheral surface of the wheel body is also provided with a glue collecting trough body for collecting the hemming glue flowing out of the hemming groove, a glue return channel and a glue return cavity are provided in the wheel body, the glue return cavity is connected with the glue overflow cavity, and the glue return channel is connected with the glue collecting trough body and the glue return cavity respectively; a glue return piston, the glue return piston is movably fitted in the glue return cavity and is suitable for driving the hemming glue in the glue return cavity into the glue overflow cavity; a piston driving device, the piston driving device is transmission connected with the glue return piston.

[0007] The hemming wheel according to the embodiment of the utility model can recycle the hemming glue and has the advantages of low use cost, low leakage, high reliability, etc.

[0008] In addition, the hemming wheel according to the above embodiment of the utility model may also have the following additional technical features:

[0009] According to one embodiment of the utility model, a glue injection port is also provided on the wheel body, and the glue injection port is connected to the glue overflow cavity. A glue blocking plate is provided between the glue injection port and the glue return cavity to prevent the edging glue from directly flowing into the glue overflow cavity from the glue injection port.

[0010] According to an embodiment of the utility model, a frustum is provided around the glue return cavity and extends radially outward and downward from the glue return cavity.

[0011] According to an embodiment of the present utility model, the glue return channel extends from the glue collecting tank body toward the glue return cavity and obliquely extends downward.

[0012] According to one embodiment of the utility model, there are multiple glue return channels and they are arranged at intervals along the circumference of the edging wheel. A glue storage groove is also provided in the wheel body. The glue storage groove is located between the glue return cavity and the glue collecting groove body in the radial direction of the edging wheel. The glue storage groove extends along the circumference of the edging wheel and is respectively connected to the multiple glue return channels.

[0013] According to an embodiment of the present invention, the bottom wall of the glue return channel is in a downwardly concave arc shape in a cross section perpendicular to the length direction of the glue return channel.

[0014] According to one embodiment of the utility model, the glue collecting trough protrudes from the outer circumferential surface of the wheel body and is located below the edging groove, the upper edge of the outer wall of the glue collecting trough is higher than the outer end of the glue return channel and lower than the lower edge of the edging groove, and the inner circumferential surface of the outer wall of the glue collecting trough extends outwardly from bottom to top.

[0015] According to one embodiment of the utility model, the wheel body includes: an upper cover; a glue overflow shell, the glue overflow shell is connected to the upper cover and together with the upper cover defines the glue overflow cavity, the glue overflow hole is formed at the edge of the lower surface of the glue overflow shell; a base, the base is located below the glue overflow shell, the glue return channel is arranged in the base, the glue collecting tank is arranged on the outer peripheral surface of the base, the lower end of the glue return cavity is formed on the base and the upper end extends to the glue overflow cavity; a gasket, the gasket is clamped between the glue overflow shell and the base, and the gasket, the base and the glue overflow shell together define the edging groove.

[0016] According to an embodiment of the utility model, the glue return piston comprises: a piston body; a sealing sleeve, wherein the sealing sleeve is sleeved outside the piston body, and the sealing sleeve is sealed and matched with the glue return chamber.

[0017] According to one embodiment of the utility model, the glue return piston is movably engaged in the glue return chamber between a retracted position and an ejection position, the glue return piston is located below the glue return channel in the retracted position and is not lower than the upper end of the glue return chamber in the ejection position, and the glue return piston is suitable for driving the edging glue in the glue return chamber into the glue overflow chamber during the process of moving from the retracted position to the ejection position.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of an edge wrapping wheel according to a specific embodiment of the utility model.

[0021] Figure 2 It is a partial structural schematic diagram of an edge wrapping wheel according to a specific embodiment of the utility model.

[0022] Figure 3 It is a partial exploded view of an edge wrapping wheel according to a specific embodiment of the utility model.

[0023] Figure 4 It is a partial structural schematic diagram of an upper cover of an edge wrapping wheel according to a specific embodiment of the utility model.

[0024] Figure 5 It is a partial structural schematic diagram of a glue overflow shell of an edge wrapping wheel according to a specific embodiment of the utility model.

[0025] Figure 6 It is a partial structural schematic diagram of a base and a gasket of an edge wrapping wheel according to a specific embodiment of the utility model.

[0026] Figure 7 It is a partial structural schematic diagram of an edge wrapping wheel according to a specific embodiment of the utility model.

[0027] Figure 8 It is a partial exploded view of an edge wrapping wheel according to a specific embodiment of the utility model.

[0028] Fig. 9 It is a partial exploded view of an edge wrapping wheel according to another specific embodiment of the utility model.

[0029] Figure numerals: hemming wheel 1, wheel body 100, overflow glue chamber 101, hemming groove 102, return glue chamber 103, upper cover 110, glue injection port 111, glue blocking plate 112, glue injection tube 113, connecting plate 114, glue hole 115, connecting rod 116, overflow glue shell 120, overflow glue hole 121, frustum 122, base 130, glue collecting tank body 131, return glue channel 132, glue storage groove 133, mounting tube 134, pressure relief hole 135, return glue hole 136, gasket 140, return glue piston 200, piston body 210, sealing sleeve 220, pressure relief port 221, elastic member 310, spring seat 311, vent 312, electromagnet 321, ferromagnetic member 322. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The following describes an edge wrapping wheel 1 according to an embodiment of the utility model with reference to the accompanying drawings.

[0034] like Figure 1-Figure 9 As shown, the hemming wheel 1 according to the embodiment of the utility model includes a wheel body 100, a glue return piston 200 and a piston driving device.

[0035] The wheel body 100 has an overflow glue cavity 101, and the outer peripheral surface of the wheel body 100 is provided with an edge binding groove 102. The overflow glue cavity 101 and the edge binding groove 102 are connected through an overflow glue hole 121. The peripheral surface of the wheel body 100 is also provided with a glue collecting tank body 131 for collecting the edge binding glue flowing out of the edge binding groove 102. The wheel body 100 is provided with a glue return channel 132 and a glue return cavity 103. The glue return cavity 103 is connected with the overflow glue cavity 101, and the glue return channel 132 is connected with the glue collecting tank body 131 and the glue return cavity 103 respectively. The glue return piston 200 is movably matched in the glue return cavity 103 and is suitable for driving the edge binding glue in the glue return cavity 103 into the overflow glue cavity 101. The piston drive device is transmission-connected to the glue return piston 200.

[0036] Specifically, the hemming glue is first injected into the overflow glue chamber 101, and the hemming glue in the overflow glue chamber 101 flows into the hemming groove 102 through the overflow glue hole 121 for hemming. During the hemming process, excess hemming glue overflowing from the hemming groove 102 falls into the glue collecting groove 131, and the hemming glue in the glue collecting groove 131 flows into the glue return chamber 103 along the glue return channel 132, and returns to the overflow glue chamber 101 under the drive of the glue return piston 200, thereby realizing the recycling of the hemming glue.

[0037] According to the hemming wheel 1 of the embodiment of the utility model, by providing a glue collecting tank body 131, a glue return channel 132, a glue return chamber 103 and a glue return piston 200, the glue collecting tank body 131 can be used to collect excess hemming glue overflowing from the hemming tank 102, and the hemming glue can flow into the glue return chamber 103 through the glue return channel 132, and then return to the overflow glue chamber 101 under the drive of the glue return piston 200, thereby realizing the recycling of the hemming glue, improving the utilization rate of the hemming glue, and reducing the use cost of the hemming glue.

[0038] Furthermore, by integrating the glue collecting tank 131, the glue return channel 132 and the glue return chamber 103 on the hemming wheel 1, compared with the technical solution of using external pipelines in the related art, on the one hand, the structure can be made more compact and the space utilization rate can be improved, and the use of external pipelines can be avoided, and the use of external pipelines to guide the hemming glue can be avoided, so that the hemming glue is not easy to leak.

[0039] In addition, by setting up a glue return piston 200, the glue return piston 200 is used to push the edge glue from the glue return chamber 103 into the glue overflow chamber 101. Compared with the method of using a rubber tube and a peristaltic pump to drive the edge glue in the related art, the use of a rubber tube and a peristaltic pump can be avoided. Not only can the leakage of the edge glue caused by corrosion or extrusion of the rubber tube after solidification be avoided, but also the edge glue is driven by the glue return piston 200. Compared with the method of driving by squeezing the hose with a peristaltic pump in the related art, the driving of the edge glue is not easily hindered by the solidification of the edge glue, so the glue return process is not prone to blockage, which can improve the reliability of the edge glue driving.

[0040] Therefore, the hemming wheel 1 according to the embodiment of the utility model can recycle the hemming glue, and has the advantages of low cost of use, low leakage, high reliability, etc.

[0041] The following describes an edge wrapping wheel 1 according to a specific embodiment of the utility model with reference to the accompanying drawings.

[0042] In some specific embodiments of the present invention, Figure 1-Figure 9 As shown, the hemming wheel 1 according to the embodiment of the utility model includes a wheel body 100, a glue return piston 200 and a piston driving device.

[0043] Advantageously, if Figure 2-Figure 4 As shown, the wheel body 100 is also provided with a glue injection port 111, which is connected to the overflow glue cavity 101, and a glue blocking plate 112 is provided between the glue injection port 111 and the glue return cavity 103 to prevent the edge glue from directly flowing from the glue injection port 111 into the overflow glue cavity 101. Specifically, the glue injection port 111 is connected to a glue injection tube 113, and a connecting plate 114 is provided in the glue injection tube 113. The connecting plate 114 is provided with a glue hole 115, and the glue blocking plate 112 is connected to the connecting plate 114 through a connecting rod 116. The diameter of the glue blocking plate 112 is 5-200 mm, and the thickness is 0.5-5 mm. In this way, the glue blocking plate 112 can be used to block the edge binding glue flowing into the glue injection port 111, preventing the edge binding glue from directly entering the glue return cavity 103 after entering from the glue injection port 111. After entering from the glue injection port 111, the edge binding glue can first enter the edge binding groove 102 through the glue overflow hole 121 under the stop of the glue blocking plate 112, thereby ensuring the edge binding glue supply at the edge binding groove 102.

[0044] More advantageously, if Figure 2 , Figure 3 and Figure 5As shown, a cone 122 is provided around the glue return cavity 103, extending radially outward and downward from the glue return cavity 103 (the up and down directions are shown by the arrows in the figure). Specifically, the cone 122 has a taper of 1-10 degrees and a height of 0.5-10 mm. In this way, after the glue return piston 200 pushes the hemming glue in the glue return cavity 103 into the glue overflow cavity 101, the hemming glue can flow outward along the cone 122 under the action of gravity, prompting the returned hemming glue to flow to the glue overflow hole 121, and then flow into the hemming groove 102 again to continue to participate in the hemming.

[0045] Furthermore, if Figure 2 , Figure 3 and Figure 6 As shown, the glue return channel 132 extends from the glue collecting tank 131 to the glue return cavity 103 and extends downwardly in an inclined manner, so that the edge glue in the glue collecting tank 131 can flow into the glue return cavity 103 under the action of gravity.

[0046] Specifically, the glue injection port 111 and the glue return cavity 103 are coaxially arranged, and the glue injection port 111 and the glue return cavity 103 are located at the radial center of the wheel body 100. At this time, the cone 122 extends outward and tilted downward along the radial direction of the hemming wheel 1. The glue return channel 132 extends inward and tilted downward along the radial direction of the hemming wheel 1. In this way, the distribution of the hemming glue can be more uniform, and the uniformity of the hemming can be improved.

[0047] Specifically, Figure 2 , Figure 3 and Figure 6 As shown, there are multiple glue return channels 132 and they are arranged at intervals along the circumference of the hemming wheel 1. A glue storage groove 133 is also provided in the wheel body 100. The glue storage groove 133 is located between the glue return cavity 103 and the glue collecting tank body 131 in the radial direction of the hemming wheel 1. The glue storage groove 133 extends along the circumference of the hemming wheel 1 and is respectively connected with multiple glue return channels 132. In this way, the hemming glue in the glue collecting tank body 131 can be guided to the glue return cavity 103 by using multiple glue return channels 132, so that the hemming glue in the glue collecting tank body 131 is more evenly distributed. Moreover, by providing the glue storage groove 133, on the one hand, the glue storage groove 133 can be used to temporarily store the returned hemming glue. On the other hand, the glue storage groove 133 can further improve the uniformity of the hemming glue distribution between the multiple glue return channels 132 by connecting the multiple glue return channels 132, so as to avoid overflow caused by excessive hemming glue in the glue collecting tank body 131.

[0048] Alternatively, if Figure 6 As shown, the bottom wall of the glue return channel 132 is a downwardly concave arc in the cross section perpendicular to the length direction of the glue return channel 132. In other words, the bottom wall of the glue return channel 132 is an arc-shaped surface that is concave downward on both sides of the middle part in the width direction. This can facilitate the flow of the edge glue along the glue return channel 132, reduce the resistance of the edge glue flow, and make the edge glue flow more smoothly.

[0049] More specifically, Figure 1-Figure 3 and Figure 6 As shown, the glue collecting tank body 131 protrudes from the outer circumference of the wheel body 100 and is located below the edge wrapping groove 102. The upper edge of the outer wall of the glue collecting tank body 131 is higher than the outer end of the glue return channel 132 and lower than the lower edge of the edge wrapping groove 102. The inner circumference of the outer wall of the glue collecting tank body 131 extends outwardly from bottom to top. In this way, the glue collecting tank body 131 can be prevented from blocking the edge wrapping groove 102, making it easier to extend the edge of the battery cell into the edge wrapping groove 102 for edge wrapping, and the edge wrapping glue in the glue collecting tank body 131 can be urged to enter the glue return channel 132, preventing the edge wrapping glue from overflowing the glue collecting tank body 131.

[0050] Figure 1-Figure 9 FIG. 1 shows some examples of hemming wheels 1 according to the present invention. Figure 1-Figure 6 As shown, the wheel body 100 includes an upper cover 110, a glue overflow shell 120, a base 130 and a gasket 140. The glue overflow shell 120 is connected to the upper cover 110 and defines a glue overflow cavity 101 together with the upper cover 110. The glue overflow hole 121 is formed at the edge of the lower surface of the glue overflow shell 120. The base 130 is located below the glue overflow shell 120, the glue return channel 132 is arranged in the base 130, the glue collecting tank body 131 is arranged on the outer peripheral surface of the base 130, the lower end of the glue return cavity 103 is formed on the base 130 and the upper end extends to the glue overflow cavity 101. The gasket 140 is clamped between the glue overflow shell 120 and the base 130, and the gasket 140, the base 130 and the glue overflow shell 120 define the edging groove 102 together. Specifically, the outer peripheral surface of the gasket 140, the outer edge portion of the upper surface of the base 130 and the outer edge portion of the lower surface of the overflow shell 120 jointly define the edging groove 102. In this way, each component of the wheel body 100 can be processed independently, reducing the processing difficulty and facilitating the processing and manufacturing of the wheel body 100.

[0051] Specifically, the thickness of the gasket 140 can be adjusted according to actual needs to adjust the width of the edging groove 102. Here, the thickness of the gasket 140 is preferably 0.2-5 mm.

[0052] Specifically, Figure 7-Figure 9 As shown, the glue return piston 200 includes a piston body 210 and a sealing sleeve 220. The sealing sleeve 220 is sleeved outside the piston body 210, and the sealing sleeve 220 is sealed with the glue return chamber. Specifically, the sealing sleeve 220 moves with the piston body 210, and the sealing sleeve 220 is a self-lubricating and corrosion-resistant material. The peripheral wall of the glue return chamber 103 is a self-lubricating and corrosion-resistant material. In this way, it can be ensured that the glue return piston 200 pushes the hemming glue in the piston body 210 into the overflow glue chamber 101.

[0053] More specifically, the glue return piston 200 is movably engaged in the glue return chamber 103 between a retracted position and an ejected position, and the glue return piston 200 is located below the glue return channel 132 at the retracted position (e.g., Figure 7 As shown in the figure, and in the ejection position not lower than the upper end of the glue return chamber 103, the glue return piston 200 is suitable for driving the hemming glue in the glue return chamber 103 into the glue overflow chamber 101 during the process of moving from the retracted position to the ejection position. In this way, the hemming glue flowing into the glue return chamber 103 through the glue return channel 132 can be continuously pushed into the glue overflow chamber 101 through the reciprocating motion of the glue return piston 200.

[0054] In some embodiments, the piston driving device is a pneumatic driving device and is suitable for driving the glue return piston 200 to reciprocate. In other words, the pneumatic driving device is suitable for driving the glue return piston 200 to move from the retracted position to the ejection position and is suitable for driving the glue return piston 200 to move from the ejection position to the retracted position.

[0055] In some embodiments, the piston driving device is an electromagnetic driving device and is suitable for driving the glue return piston 200 to reciprocate. In other words, the electromagnetic driving device is suitable for driving the glue return piston 200 to move from the retracted position to the ejection position and is suitable for driving the glue return piston 200 to move from the ejection position to the retracted position.

[0056] In some embodiments, Figure 7-Figure 9 As shown, the piston driving device includes an elastic member 310, which is used to drive the glue return piston 200 to move from the retracted position to the ejection position or is suitable for driving the glue return piston 200 to move from the ejection position to the retracted position.

[0057] In some embodiments, Figure 7-Figure 8 As shown, the piston driving device includes an elastic member 310 and a pneumatic driving device. The pneumatic driving device is suitable for driving the glue return piston 200 to move from the retracted position to the ejection position and the elastic member 310 is suitable for driving the glue return piston 200 to move from the ejection position to the retracted position, or the pneumatic driving device is suitable for driving the glue return piston 200 to move from the ejection position to the retracted position and the elastic member 310 is suitable for driving the glue return piston 200 to move from the retracted position to the ejection position.

[0058] Figure 7-Figure 8In the illustrated embodiment, a mounting tube 134 is connected to the lower surface of the base 130, the mounting tube 134 is in communication with the glue return chamber 103, a pressure relief hole 135 is provided on the mounting tube 134, a spring seat 311 is installed in the mounting tube 134, the elastic member 310 is a tension spring and is respectively connected to the spring seat 311 and the piston body 210 and often drives the glue return piston 200 to move from the ejection position to the retracted position, a vent hole 312 is provided on the spring seat 311, and a pressure relief port 221 is provided on the sealing sleeve 220. When the glue return piston 200 is in the ejection position, the pressure relief hole 135 is in communication with the pressure relief port 221. In this way, the glue return piston 200 can be pushed upward by injecting compressed air into the vent hole 312. When reaching the ejection position, the pressure relief hole 135 and the pressure relief port 221 are connected to release pressure. The glue return piston 200 returns to the retracted position under the action of the elastic member 310, completing one glue return. The glue return piston continues to reciprocate under the continuous push of compressed air to achieve continuous glue return.

[0059] The elastic member 310 may also be a compression spring and often drives the glue return piston 200 to move from the retracted position to the ejection position. The pressure relief hole 135 and the pressure relief port 221 are connected when the glue return piston 200 moves to the retracted position. The glue return piston 200 moves downward by pumping air through the vent hole 312. When the glue return piston 200 reaches the retracted position, the pressure relief hole 135 and the pressure relief port 221 are connected to release pressure. The glue return piston 200 returns to the ejection position under the action of the elastic member 310, and a glue return is completed. The glue return piston 200 continuously reciprocates under the drive of continuous pumping to achieve continuous glue return.

[0060] The elastic member 310 may also be connected to the piston body 210 and the upper cover 110 respectively and adjust the stretching or compression direction according to the driving direction.

[0061] In some embodiments, Fig. 9 As shown, the piston driving device includes an elastic member 310 and an electromagnetic driving device.

[0062] Fig. 9In the illustrated embodiment, the lower surface of the base 130 is connected with a mounting tube 134, the mounting tube 134 is connected with the glue return chamber 103, a spring seat 311 is installed in the mounting tube 134, the elastic member 310 is a tension spring and is respectively connected with the spring seat 311 and the piston body 210 and often drives the glue return piston 200 to move from the ejection position to the retracted position. An electromagnet 321 is provided on one of the piston body 210 and the spring seat 311, and a ferromagnetic member 322 is provided on the other, and the electromagnet 321 and the ferromagnetic member 322 are suitable for adsorption to each other. In this way, the electromagnet 321 can be energized to make the electromagnet 321 adsorb the ferromagnetic member 322, so that the glue return piston 200 moves downward to the retracted position, and then the electromagnet 321 is de-energized, and the glue return piston 200 returns to the ejection position under the action of the elastic member 310, completing a glue return, and reciprocating motion is performed under the continuous on and off of the electromagnet, so as to achieve continuous glue return.

[0063] The elastic member 310 may also be a compression spring and always drives the glue return piston 200 to move from the retracted position to the ejection position. The ferromagnetic member 322 may be a permanent magnet and repel the polarity of the electromagnet 321. In this way, the electromagnet 321 can be powered on to push the ferromagnetic member 322, so that the glue return piston 200 moves upward to the ejection position. After that, the electromagnet 321 is powered off, and the glue return piston 200 returns to the retracted position under the action of the elastic member 310, completing one glue return. The electromagnet is continuously powered on and off to perform reciprocating motion, so as to achieve continuous glue return.

[0064] The elastic member 310 may also be connected to the piston body 210 and the upper cover 110 respectively and adjust the stretching or compression direction according to the driving direction.

[0065] It should be understood here that the piston drive device can also be a combination of a pneumatic drive device, an electromagnetic drive device and an elastic member.

[0066] Of course, the piston driving device may also be other driving devices, such as a motor, a cylinder, etc.

[0067] Specifically, the diameter of the overflow glue hole 121 is 0.3-1 mm, and the number is 60-360, so that the edge glue can flow into the edge glue groove 102. The diameter of the glue return cavity 103 is 5-200 mm to store and return the edge glue.

[0068] The circumference of the base 130 may be provided with a plurality of glue return holes 136 connecting the glue collecting tank 131 and the glue return channel 132. The glue return holes 136 are arranged adjacent to the bottom wall of the glue collecting tank 131 so that the hemming glue in the glue collecting tank 131 can enter the glue return channel 132.

[0069] Other structures and operations of the hemming wheel 1 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hemming wheel, characterized in that: include: A wheel body, wherein the wheel body has an overflow glue cavity, an outer peripheral surface of the wheel body is provided with an edge binding groove, the overflow glue cavity and the edge binding groove are connected through an overflow glue hole, the peripheral surface of the wheel body is also provided with a glue collecting groove body for collecting the edge binding glue flowing out of the edge binding groove, a glue return channel and a glue return cavity are provided in the wheel body, the glue return cavity is connected with the overflow glue cavity, and the glue return channel is respectively connected with the glue collecting groove body and the glue return cavity; A glue return piston, the glue return piston is movably engaged in the glue return chamber and is suitable for driving the hemming glue in the glue return chamber into the glue overflow chamber; A piston driving device is drivingly connected to the rubber return piston.

2. The hemming wheel according to claim 1, characterized in that: The wheel body is also provided with a glue injection port, which is communicated with the overflow glue cavity. A glue blocking plate is provided between the glue injection port and the glue return cavity to prevent the edge glue from directly flowing into the overflow glue cavity from the glue injection port.

3. The hemming wheel according to claim 1, characterized in that: A frustum is arranged around the glue return cavity and extends radially outward and downward from the glue return cavity.

4. The hemming wheel according to claim 1, characterized in that: The glue return channel extends from the glue collecting tank body toward the glue return cavity and obliquely extends downward.

5. The hemming wheel according to claim 1, characterized in that: There are multiple glue return channels and they are spaced apart along the circumference of the hemming wheel. A glue storage groove is also provided in the wheel body. The glue storage groove is located between the glue return cavity and the glue collecting groove body in the radial direction of the hemming wheel. The glue storage groove extends along the circumference of the hemming wheel and is respectively connected to the multiple glue return channels.

6. The hemming wheel according to claim 1, characterized in that: The bottom wall of the glue return channel is in a downwardly concave arc shape in a cross section perpendicular to the length direction of the glue return channel.

7. The hemming wheel according to claim 1, characterized in that: The glue collecting trough protrudes from the outer circumference of the wheel body and is located below the edging groove. The upper edge of the outer wall of the glue collecting trough is higher than the outer end of the glue return channel and lower than the lower edge of the edging groove. The inner circumference of the outer wall of the glue collecting trough extends outwardly from bottom to top.

8. The hemming wheel according to claim 1, characterized in that: The wheel body comprises: Upper cover; An overflowing glue shell, the overflowing glue shell is connected to the upper cover and defines the overflowing glue cavity together with the upper cover, and the overflowing glue hole is formed at the edge of the lower surface of the overflowing glue shell; A base, wherein the base is located below the overflow glue shell, the glue return channel is arranged in the base, the glue collecting tank is arranged on the outer peripheral surface of the base, the lower end of the glue return cavity is formed on the base and the upper end extends to the overflow glue cavity; A gasket is clamped between the overflowing plastic shell and the base, and the gasket, the base and the overflowing plastic shell jointly define the edging groove.

9. The hemming wheel according to claim 1, characterized in that: The glue return piston comprises: Piston body; A sealing sleeve is arranged outside the piston body and is sealed with the rubber return cavity.

10. The hemming wheel according to claim 1, characterized in that: The glue return piston is movably engaged in the glue return chamber between a retracted position and an ejection position. The glue return piston is located below the glue return channel at the retracted position and is not lower than the upper end of the glue return chamber at the ejection position. The glue return piston is suitable for driving the hemming glue in the glue return chamber into the glue overflow chamber during the movement from the retracted position to the ejection position.

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