Cam pressing device for rotating table

Abstract

The present invention discloses a cam clamping device for a rotary table, which relates to the technical field of photovoltaic production equipment, and includes a matching turntable fixture assembly and a cam limiting mechanism. The turntable fixture assembly includes a turntable body, and the turntable body is provided with at least a first station, a second station, a third station, and a fourth station. The first station, the second station, the third station, and the fourth station are each provided with a clamping component connected in a vertical sliding manner, and a cam follower is rotatably connected to the clamping component. The cam limiting mechanism includes a cam limiting disc and a pressure head for pressing down the cam follower, and the cam limiting disc is provided with at least a first direction, a second direction, a third direction, and a fourth direction. The present invention cooperates with a multi-station turntable mechanism, and the degree of clamping is stable throughout the entire process, the welding effect of the welding strip is good, the power components, the air pipe, and the line are simplified, the failure rate is greatly reduced, and different working conditions are not easily occurred, thereby avoiding unstable welding effect.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic production equipment, and in particular to a cam pressing device for a rotating table. Background Art

[0002] The photovoltaic industry has a pre-welding device for solar cells, which consists of four steps: loading the cell at the first station, loading the solder strip at the second station, pre-welding at the third station, and unloading at the fourth station. Therefore, a device with a four-station turntable mechanism was developed to solve the above pre-welding problem. The traditional four-station system uses four cylinders to press the four stations respectively. Such a mechanism has several obvious shortcomings: 1. The stroke accuracy of the cylinder is not high, which easily leads to differences in the degree of compression, thus affecting the welding effect; 2. The turntable mechanism is always rotating. Too many cylinders lead to too many air pipes and wires in the entire mechanism, making the mechanism too complicated and the failure rate high; 3. The stroke of the cylinder has a certain error. In addition, its degree of compression is also related to the pressure of the compressed air. Four different cylinders are prone to different working conditions, which ultimately leads to differences in welding effects. Summary of the Invention

[0003] In order to solve the technical problems that the existing four-station turntable mechanism used for photovoltaic production has an unstable compression degree throughout the entire process, which affects the welding effect, and too many power components lead to an increased failure rate, the present invention provides a cam clamping device for a rotary table. It cooperates with a multi-station turntable mechanism, has a stable compression degree throughout the entire process, and has a good welding effect of the welding strip. It streamlines the power components and air pipes and lines, greatly reduces the failure rate, and is not prone to different working conditions, thereby avoiding unstable welding effects.

[0004] Technical Solution

[0005] In order to solve the above problems, the technical solution provided by the present invention is:

[0006] The cam clamping device for a rotating table comprises a matching turntable fixture assembly and a cam limiting mechanism, the turntable fixture assembly comprises a turntable body, the turntable body is provided with at least a first station, a second station, a third station and a fourth station, the first station, the second station, the third station and the fourth station are all provided with a vertically slidingly connected clamping component, the clamping component is rotatably connected to the cam follower, the cam limiting mechanism comprises a cam limiting disc and a pressure head for pressing down the cam follower, the cam limiting disc is provided with at least a first direction, a second direction, a third direction and a fourth direction corresponding to the first station, the second station, the third station and the fourth station respectively, the second direction is provided with a notch for passing the cam follower, the bottom of the cam limiting disc on the third direction side is rollingly engaged with the cam follower, the cam limiting disc is provided with an inclined surface for guiding the cam follower at the bottom on the fourth direction side, and the pressure head is located on the second direction side and is connected to the first power element.

[0007] Optionally, a hydraulic buffer is provided on the fourth direction side, and a buffer head of the hydraulic buffer is aligned with the outlet of the inclined surface.

[0008] Optionally, the first power element is connected to the pressure head via a moving plate, and a first photoelectric sensor for detecting the pressure head is provided next to the pressure head.

[0009] Optionally, a second power element is provided on the moving plate, and the pressure head is hinged to the moving plate to form a lever structure. The output end of the second power element cooperates with the lever structure to control the pressure head. The lever structure of the pressure head is provided with two extreme positions. The pressure head at the first extreme position cooperates with the cam follower, and the pressure head at the second extreme position is offset from the cam follower.

[0010] Optionally, an elastic element for resetting is connected between the pressure head and the moving plate.

[0011] Optionally, a second photoelectric sensor for detecting the cam follower is provided at the bottom of the cam limiting disc on the second direction side.

[0012] Optionally, a radius of the cam limiting disc on the first direction side is smaller than a rotation radius of the cam follower.

[0013] Optionally, a fixing plate is fixed to the cam limiting disc via a positioning support rod, and the first power element is connected to the fixing plate via a mounting plate.

[0014] Beneficial effects

[0015] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0016] The technical solution provided by the present invention sets up a matching turntable fixture assembly and a cam limit mechanism. The clamping degree of the multi-station turntable mechanism depends on the coordination, shape and position of the cam limit disc and the cam follower. The clamping degree is stable throughout the entire process, and the welding effect of the welding strip is good. At the same time, the power components, air pipes and lines are streamlined, which greatly reduces the failure rate; further, a hydraulic buffer is provided to be aligned with the outlet of the inclined surface to prevent the cam follower from colliding hard with the device due to power or inertia after coming out of the outlet of the inclined surface, thereby damaging the device; further, a second power element is provided to control the pressure head, and the lever structure of the pressure head has two extreme positions. The pressure head at the first extreme position can press down the cam follower, and the pressure head at the second extreme position can avoid interference with the cam follower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a cam pressing device for a rotary table proposed in an embodiment of the present invention.

[0018] Figure 2 This is a structural schematic diagram of a turntable fixture assembly of a cam pressing device for a rotary table proposed in an embodiment of the present invention.

[0019] Figure 3 This is a structural schematic diagram of a pressing component of a cam pressing device for a rotary table proposed in an embodiment of the present invention.

[0020] Figure 4 This is a structural schematic diagram of a cam limiting mechanism of a cam pressing device for a rotary table proposed in an embodiment of the present invention.

[0021] Figure 5 This is a cross-sectional schematic diagram of a cam limiting mechanism of a cam pressing device for a rotary table proposed in an embodiment of the present invention.

[0022] Figure 6 This is a structural schematic diagram of a cam limiting disc of a cam pressing device for a rotary table proposed in an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the bottom structure of a cam limiting disc of a cam pressing device for a rotary table proposed in an embodiment of the present invention.

[0024] 100. Rotating power mechanism; 200. Turntable fixture assembly; 201. First workstation; 202. Second workstation; 203. Third workstation; 204. Fourth workstation; 205. Turntable body; 206. Cell and ribbon positioning fixture; 207. Pressing component; 208. Cam follower; 300. Cam limiting mechanism; 301. Cam limiting disc; 30101. First direction; 30102. Second direction; 30103. Third direction; 30104. Fourth direction; 30105. Inclined surface; 302. Hydraulic buffer; 303. Positioning support rod; 304. Fixed plate; 305. First power element; 306. First photoelectric sensor; 307. Photoelectric bracket; 308. Second power element; 309. Moving plate; 310. Press head; 311. Second photoelectric sensor; 312. Elastic element; 313. Proximity switch. DETAILED DESCRIPTION

[0025] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0026] The present application will be further described below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended solely to illustrate the relevant inventions and are not intended to limit the inventions. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the drawings. Terms such as "first" and "second" in the present application are provided for the convenience of describing the technical solutions of the present invention and do not have a specific limiting effect. They are general references and do not constitute a limitation on the technical solutions of the present invention. It should be noted that the embodiments and features therein in the present application may be combined with each other unless there is a conflict. In the description of the present invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 an indirect connection through an intermediate medium, or it can be a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0027] Example

[0028] Combined with attachment Figure 1-7A cam pressing device for a rotary table includes a matched turntable fixture assembly 200 and a cam limiting mechanism 300. The turntable fixture assembly 200 includes a turntable body 205. The turntable body 205 is provided with at least a first station 201, a second station 202, a third station 203 and a fourth station 204. The first station 201, the second station 202, the third station 203 and the fourth station 204 are each provided with a vertically slidingly connected pressing component 207. A cam follower 208 is rotatably connected to the pressing component 207. The cam limiting mechanism 300 includes a cam limiting disc 301 and a pressure head 310 for pressing down the cam follower 208. The cam limiting disc 301 is provided with a pressure head 310 for pressing down the cam follower 208. At least a first direction 30101, a second direction 30102, a third direction 30103 and a fourth direction 30104 are provided which correspond to the first workstation 201, the second workstation 202, the third workstation 203 and the fourth workstation 204 respectively. The second direction 30102 is provided with a notch for passing the cam follower 208. The bottom of the cam limiting disc 301 on the third direction 30103 side is rollingly engaged with the cam follower 208. The bottom of the cam limiting disc 301 on the fourth direction 30104 is provided with an inclined surface 30105 for guiding the cam follower 208. The pressure head 310 is located in the second direction 30102 and is connected to the first power element 305.

[0029] The cam pressing device is included in the overall multi-station turntable pre-welding device. This embodiment takes a four-station turntable pre-welding device as an example. A rotating power mechanism 100 is connected below the turntable fixture assembly 200 to provide rotational power for the turntable fixture assembly 200. During operation, the rotating power mechanism 100 drives the turntable body 205 to rotate to realize the switching of each station. In this embodiment, the first station 201 is for loading battery cells, the second station 202 is for loading welding strips, the third station 203 is for pre-welding, and the fourth station 204 is for unloading. Figure 1 As shown, the positions of the pressing component 207 corresponding to different processes are different. The position of the pressing component 207 has two extreme positions distributed vertically. The pressing component 207 slides between the two extreme positions, and the pressing component 207 is provided with an elastic reset structure. The first extreme position is set above the second extreme position. When the pressing component 207 is at the first extreme position, the pressing component 207 does not press the battery cell and the soldering strip; when the pressing component 207 is at the second extreme position, the pressing component 207 presses the battery cell and the soldering strip. Therefore, at the first station 201, the pressing component 207 is at the first extreme position; at the second station 202, the pressing component 207 is at the second extreme position; at the third station 203, the pressing component 207 is always at the second extreme position; at the fourth station 204, the pressing component 207 is at the first extreme position. As shown Figure 6 and 7As shown, the notch facilitates the pressing head 310 to press the cam follower 208 downward to the bottom surface of the cam stop disc 301. After the turntable body 205 rotates, the cam follower 208 moves to the bottom surface of the cam stop disc 301 in the third direction 30103. During this process, the pressing component 207 remains in the second limit position. As the turntable body 205 continues to rotate, the cam follower 208, guided by the inclined surface 30105, rises to the first limit position for unloading, completing the cycle. In this embodiment, proximity switches 313 are provided in the first direction 30101 and the fourth direction 30104 of the cam stop disc 301 to detect the position of the cam follower 208. All sensors and power components in this embodiment are connected to the controller. The first power element 305 is a first cylinder, which provides power for the up and down movement of the pressing head 310. The clamping component 207 that cooperates with the cam limit disc 301 reduces the control precision error compared to many clamping solutions controlled by power components, uses shape matching for positioning and clamping, and the clamping degree is stable throughout the whole process, and the welding effect of the welding strip is good.

[0030] A hydraulic buffer 302 is provided on the fourth direction 30104, and the buffer head of the hydraulic buffer 302 is aligned with the outlet of the inclined surface 30105 to prevent the cam follower 208 from colliding with the device due to power or inertia after coming out of the outlet of the inclined surface 30105, thereby damaging the device.

[0031] The first power element 305 is connected to the pressure head 310 through a moving plate 309. A first photoelectric sensor 306 for detecting the pressure head 310 is provided next to the pressure head 310. The first photoelectric sensor 306 is used to detect whether the pressure head 310 and the pressing component 207 are in the first limit position of the pressing component 207. Figure 5 shown.

[0032] The moving plate 309 is provided with a second power element 308. The ram 310 is hinged to the moving plate 309 to form a lever structure. The output end of the second power element 308 cooperates with the lever structure to control the ram 310. The lever structure of the ram 310 has two extreme positions: in the first extreme position, the ram 310 cooperates with the cam follower 208; in the second extreme position, the ram 310 is offset from the cam follower 208. The lever structure of the ram 310 has two extreme positions: in the first extreme position, the ram 310 can press down on the cam follower 208; in the second extreme position, the ram 310 avoids interference with the cam follower 208. When the turntable body 205 rotates, if the cylinder above the ram 310 retracts too slowly just before the cam follower 208 of the next station rotates to the current station, a collision may occur. This design is to avoid interference and collision. A resilient element 312 is connected between the ram 310 and the moving plate 309 for resetting.

[0033] A second photoelectric sensor 311 for detecting the cam follower 208 is provided at the bottom of the cam limiting disc 301 in the second direction 30102. The second photoelectric sensor 311 is used to detect the second limit position of the pressing component 207 to prevent it from losing its position.

[0034] The radius of the cam stop disc 301 on the first direction 30101 side is smaller than the rotation radius of the cam follower 208. The first direction 30101 corresponds to the first workstation 201. The first workstation 201 is used for unloading. The pressing component 207 must be in the first extreme position. Therefore, the cam follower 208 is located above the cam stop disc 301. The radius of the cam stop disc 301 on the first direction 30101 side is smaller than the rotation radius of the cam follower 208 to avoid interference.

[0035] The cam limiting disc 301 is fixedly connected to a fixing plate 304 via a positioning support rod 303. The first power element 305 is connected to the fixing plate 304 via a mounting plate. The fixing plate 304 serves as a structural support, greatly reducing the number of tooling, streamlining the structure, saving costs, and facilitating subsequent maintenance.

[0036] In this embodiment, only two power elements are used for cam compression, which greatly reduces the number of power elements, thereby reducing air pipes and lines, greatly reducing the failure rate, and facilitating maintenance and repair.

[0037] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A cam pressing device for a rotary table, characterized in that: The cam limiter is a device for producing a plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations of the plurality of rotations A hydraulic buffer is provided on the fourth direction side, and a buffer head of the hydraulic buffer is aligned with the outlet of the inclined surface; The first power element is connected to the pressure head through a moving plate, and a first photoelectric sensor for detecting the pressure head is provided next to the pressure head.

2. A cam pressing device for a rotary table according to claim 1, characterized in that: A second power element is provided on the moving plate, and the pressure head is hinged to the moving plate to form a lever structure. The output end of the second power element cooperates with the lever structure to control the pressure head. The lever structure of the pressure head is provided with two extreme positions. The pressure head at the first extreme position cooperates with the cam follower, and the pressure head at the second extreme position is misaligned with the cam follower.

3. A cam pressing device for a rotary table according to claim 2, characterized in that: An elastic element for resetting is connected between the pressure head and the moving plate.

4. The cam pressing device for a rotary table according to claim 1, characterized in that: The cam limiting disc is provided with a second photoelectric sensor at the bottom on the second direction side for detecting the cam follower.

5. The cam pressing device for a rotary table according to claim 1, characterized in that: The radius of the cam limiting disc on the first direction side is smaller than the rotation radius of the cam follower.

6. A cam pressing device for a rotary table according to any one of claims 1 to 5, characterized in that: A fixing plate is fixedly connected to the cam limiting disc via a positioning support rod, and the first power element is connected to the fixing plate via a mounting plate.

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