Drive device and screen printing apparatus

Abstract

The utility model provides a kind of driving device and silk screen printing equipment.Driving device includes pedestal and driving part, the driving part includes fixed portion connected to the pedestal, output portion is moved relative to the fixed portion, the driving device further includes cooling plate, the cooling plate is located between the fixed portion and the pedestal, and contact at least part of the pedestal and at least part of the fixed portion.In the utility model, cooling plate can take away the heat on driving part and pedestal, and cooling plate is located between pedestal and fixed portion, can block the heat transfer of driving part to pedestal, so that driving part can work in normal temperature range, and the heat generated by driving part also avoids affecting pedestal, leading to pedestal thermal deformation, thereby ensuring the stability and motion accuracy of driving device work.

Description

Technical Field

[0001] This utility model relates to the field of solar cell manufacturing, and in particular to a driving device and screen printing equipment. Background Technology

[0002] Existing screen printing equipment used for solar cell production is typically equipped with a drive unit, which is used to move the printing table with high precision. The drive unit includes a base and a linear motor as the driving component.

[0003] During the operation of screen printing equipment, the linear motor, as the driving component, generates a lot of heat under high-frequency and long-term continuous operation. If the heat cannot be dissipated in time, the temperature of the linear motor itself will rise, affecting the normal operation of the linear motor. It will also cause the linear motor to deform due to heat, thus affecting the motion accuracy of the drive device. After the heat of the linear motor is conducted to other parts of the drive device, it will have an adverse effect on the operation of the drive device. Utility Model Content

[0004] The purpose of this invention is to provide a driving device and a screen printing equipment to solve the problem of heat dissipation in the driving components in the prior art.

[0005] To achieve the above objectives, the present invention provides a driving device, which includes a base and a driving component. The driving component includes a fixed part connected to the base and an output part that moves relative to the fixed part. The driving device also includes a cooling plate disposed between the fixed part and the base, and in contact with at least a portion of the base and at least a portion of the fixed part.

[0006] As a further improvement of this utility model, the cooling plate includes a plate body, a fluid channel formed inside the plate body, a channel inlet and a channel outlet connecting the inside and outside of the fluid channel.

[0007] As a further improvement of this utility model, a fluid channel is formed inside the cooling plate, and the fluid channel extends through both ends of the cooling plate along the length direction of the base;

[0008] The drive device also includes an exhaust hood located on one side of the cooling plate along the length of the base. The exhaust hood includes an exhaust cavity formed therein and an exhaust port connecting the inside and outside of the exhaust cavity. The fluid channel connects the exhaust cavity.

[0009] As a further improvement of this utility model, the driving device includes at least two driving members, which are respectively disposed on opposite sides of the base. The cooling plate is provided between the fixing part of the driving member on the same side and the base, and one end of the fluid channel of the two cooling plates is connected to the exhaust chamber.

[0010] As a further improvement of this utility model, the cooling plate includes a plate body, a first heat-conducting layer and a second heat-conducting layer respectively attached to both sides of the plate body in the thickness direction, the side of the first heat-conducting layer away from the plate body attached to the base, the side of the second heat-conducting layer away from the plate body attached to the fixing part, and a plurality of fluid channels of the cooling plate are provided along the height direction of the base, and the plurality of fluid channels are recessed from the side of the plate body toward the base.

[0011] As a further improvement of this utility model, the compressive strength of the first thermally conductive layer is greater than that of the second thermally conductive layer.

[0012] As a further improvement of this utility model, the base is provided with a receiving groove for accommodating at least part of the cooling plate, the side of the cooling plate away from the fixing part contacts the bottom wall of the receiving groove, and the side of the fixing part facing the cooling plate contacts the cooling plate and the base.

[0013] As a further improvement of this utility model, the base is made of marble.

[0014] As a further improvement of this utility model, the driving component is a linear motor.

[0015] As a further improvement of this utility model, the above-described driving device is included.

[0016] Beneficial effects:

[0017] In the driving device and screen printing equipment provided by this utility model, the cooling plate can remove the heat from the driving component and the base. Furthermore, the cooling plate is located between the base and the fixing part, which can block the heat transfer from the driving component to the base. In this way, the driving component can work within the normal temperature range, and the heat generated by the driving component is prevented from affecting the base and causing the base to deform due to heat. This ensures the stability and motion accuracy of the driving device. Attached Figure Description

[0018] Figure 1 This is a front view of the driving device provided in the first embodiment of the present invention;

[0019] Figure 2 for Figure 1 Side view of the drive unit;

[0020] Figure 3 for Figure 2 A magnified diagram of point A in the middle;

[0021] Figure 4 for Figure 1 A three-dimensional schematic diagram of part of the drive unit;

[0022] Figure 5 for Figure 2 A three-dimensional schematic diagram of part of the structure of the intermediate cooling plate;

[0023] Figure 6 for Figure 5 A three-dimensional schematic diagram of the intermediate cooling plate;

[0024] Figure 7 for Figure 1 A three-dimensional structural diagram of the central base;

[0025] Figure 8 A side view of the driving device provided in the second embodiment of this utility model;

[0026] Figure 9 for Figure 8 A magnified diagram of point B in the middle;

[0027] Figure 10 Figure 8 A schematic diagram of part of the structure of the drive unit.

[0028] In the picture:

[0029] 100. Drive unit;

[0030] 10. Base; 11. Receiving slot;

[0031] 20. Driving component; 21. Fixing part; 22. Output part;

[0032] 30. Sliding seat;

[0033] 40. Cooling plate; 41. Fluid channel; 411. Channel inlet; 412. Channel outlet; 413. First channel; 414. Second channel; 415. Third channel; 42. First plate body; 43. Second plate body; 44. Plate body; 45. First heat-conducting layer; 46. Second heat-conducting layer;

[0034] 50. First interface; 51. Second interface;

[0035] 60. Exhaust hood; 61. Exhaust vent; 62. Exhaust chamber.

[0036] 71. Slide rail; 72. Slider. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0038] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0039] This invention provides a screen printing device, which includes a drive unit 100. The screen printing device is used to print conductive paste with a specific pattern onto the surface of a solar cell, and is a key piece of equipment in the manufacturing process of solar cells. The drive unit 100 can be used to drive the printing table to move.

[0040] like Figure 1-7 As shown, the drive device 100 includes a base 10 and a drive member 20. The drive member 20 includes a fixed portion 21 connected to the base 10 and an output portion 22 that moves relative to the fixed portion 21. When the drive member 20 is in operation, the output portion 22 can move relative to the fixed portion 21, thereby outputting power outwards.

[0041] The drive unit 100 may further include a slide seat 30 slidably connected to the base 10, and an output portion 22 connected to the slide seat 30, so that the drive member 20 can drive the slide seat 30 to move. The drive member 20 may include two output portions 22, each of which is connected to a slide seat 30, so that the drive member 20 can drive multiple slide seats 30 to move.

[0042] The sliding seat 30 is used to connect to the printing table surface. The drive device 100 may also include a slide rail 71 connected to the base 10 and a slider 72 slidably connected to the slide rail 71, with the sliding seat 30 connected to the slider 72. The arrangement of the slide rail 71 and the slider 72 allows the sliding seat 30 to slide relative to the base 10 along a stable trajectory.

[0043] The drive device 100 also includes a cooling plate 40, which is disposed between the fixed part 21 and the base 10 and contacts at least a portion of the base 10 and at least a portion of the fixed part 21. The cooling plate 40 can remove heat from the drive member 20 and the base 10. Furthermore, the cooling plate 40 is disposed between the base 10 and the fixed part 21, with the base 10 and the fixed part 21 separated by the cooling plate 40. The cooling plate 40 can block heat transfer from the drive member 20 to the base 10. In this way, the drive member 20 can operate within a normal temperature range, and the heat generated by the drive member 20 is prevented from affecting the base 10 and causing thermal deformation of the base 10, thereby ensuring the stability and motion accuracy of the drive device 100.

[0044] In this embodiment, a fluid channel 41 is formed inside the cooling plate 40. Coolant flows into and out of the fluid channel 41, carrying away heat from the cooling plate 40. Specifically, the fluid channel 41 includes a channel inlet 411 and a channel outlet 412 connecting its interior and exterior. Coolant enters the fluid channel 41 through the channel inlet 411, flows through the fluid channel 41, and then flows out of the fluid channel 41 through the channel outlet 412. During the flow of coolant through the fluid channel 41, the coolant can carry away heat from the cooling plate 40. Since the cooling plate 40 is in contact with the base 10 and the fixing part 21, the heat on the base 10 and the fixing part 21 can also be carried away by the coolant.

[0045] In this embodiment, the drive device 100 further includes a first interface 50 connected to the channel inlet 411 and a second interface 51 connected to the channel outlet 412. The first interface 50 and the second interface 51 can be connected to a pipeline so that coolant can flow into the channel inlet 411 through the pipeline. After the coolant flows out of the channel outlet 412, it can also flow to a predetermined position through the pipeline. The coolant can be water or other liquids.

[0046] The fluid channel 41 is generally U-shaped, including a first channel 413, a second channel 414, and a third channel 415 connecting the ends of the first channel 413 and the second channel 414. The first channel 413 and the second channel 414 extend along the length of the base 10 and are arranged at intervals along the height of the base 10. The channel inlet 411 and the channel outlet 412 are located at the two ends of the fluid channel 41, respectively.

[0047] It should be noted that, in this article, the length direction of the base 10 is the direction in which the base 10 is located. Figure 1 The left and right directions are shown in the diagram. The height direction of the base 10 is in the direction shown in the diagram. Figure 1 The up and down directions in the shown state.

[0048] The fluid channel 41 is designed in a "U" shape, allowing the coolant to flow through a larger area of ​​the cooling plate 40, thus maintaining a consistent temperature across all parts of the cooling plate 40. The channel inlet 411 and channel outlet 412 are located at the two ends of the fluid, respectively, and their proximity allows for a centralized arrangement of the pipes connecting the fluid channel 41, optimizing the pipe layout.

[0049] The cooling plate 40 includes a first plate 42 and a second plate 43 detachably connected to the first plate 42. The first plate 42 and the second plate 43 enclose and form the aforementioned fluid channel 41. The split design of the cooling plate 40 facilitates the machining of the internal fluid channel 41. Specifically, the cooling plate 40 can be made of aluminum. Aluminum has excellent thermal conductivity and is also lightweight and easy to machine.

[0050] It is conceivable that the aforementioned fluid channel 41 is not limited to cooling the cooling plate 40 by introducing coolant, but can also cool the cooling plate 40 by introducing cooling gas.

[0051] It should be noted that in other embodiments of this utility model, the fluid channel 41 is not limited to being "U" shaped, but can also extend along other forms of paths, which are not limited here.

[0052] In this embodiment, the driving device 100 includes at least two driving members 20, which are respectively disposed on opposite sides of the base 10. A sliding seat 30 is connected to the output portion 22 of each of the at least two driving members 20. The presence of at least two driving members 20 allows the driving device 100 to drive the sliding seat 30 to move on different sides, enabling the driving device 100 to drive more devices to move. A cooling plate 40 is provided between the fixing portion 21 of the driving member 20 located on the same side and the base 10. Two cooling plates 40 are provided on different sides, and the two cooling plates 40 on different sides can respectively remove the heat generated by the two driving members 20.

[0053] Specifically, the drive device 100 includes four drive members 20, which are respectively disposed on opposite sides of the base 10. Two drive members 20 are provided on each side, and the two drive members 20 on each side are arranged along the length of the base 10. A cooling plate 40 is provided between the fixing part 21 of the two drive members 20 on the same side and the base 10.

[0054] The base 10 has a receiving groove 11 for accommodating at least part of the cooling plate 40. The side of the cooling plate 40 away from the fixing part 21 contacts the bottom wall 111 of the receiving groove 11, and the side of the fixing part 21 facing the cooling plate 40 contacts the cooling plate 40 and the base 10.

[0055] The cooling plate 40 is disposed within the receiving groove 11, making the structure of the drive device 100 more compact. The side of the cooling plate 40 facing away from the fixing part 21 is in planar contact with the bottom wall 111 of the groove, and the side closer to the fixing part 21 is also in planar contact with the fixing part 21, resulting in a large contact area between the base 10, the fixing part 21, and the cooling plate 40. Part of the fixing part 21 contacts the cooling plate 40, and another part contacts the base 10, allowing heat from the drive component 20 to be transferred to the base 10, thus achieving a certain heat dissipation effect.

[0056] The base 10 is made of marble. Marble has a low thermal deformation rate and can reduce the impact of external vibrations on the drive component 20, thus ensuring the motion accuracy of the output part 22 on the drive component 20.

[0057] In this embodiment, the drive unit 20 is a linear motor, the fixed part 21 is the stator of the linear motor, and the output part 22 is the mover of the linear motor. Linear motors have the advantages of high response speed and high positioning accuracy, making them suitable for applications requiring rapid reciprocating motion, high-precision control, and large-stroke movement.

[0058] like Figure 8-10 The second embodiment of this utility model is shown. In the second embodiment, a fluid channel 41 is formed inside the cooling plate 40, and the fluid channel 41 extends through both ends of the cooling plate 40 along the length direction of the base 10. The driving device 100 also includes an exhaust hood 60 located on one side of the cooling plate 40 along the length direction of the base 10. The exhaust hood 60 includes an exhaust cavity 62 formed therein and an exhaust port 61 connecting the inside and outside of the exhaust cavity 62. The fluid channel 41 connects to the exhaust cavity 62.

[0059] The exhaust vent 61 is used to connect to the exhaust fan. When the exhaust fan is working, a negative pressure is generated in the exhaust chamber 62. Because the fluid channel 41 is connected to the exhaust chamber 62, when the exhaust fan is working, air can flow in from the end of the fluid channel 41 away from the exhaust hood 60, and after flowing through the fluid channel 41, it flows out from the end of the fluid channel 41 closer to the exhaust hood 60 into the exhaust chamber 62. When the air flows through the fluid channel 41, it can carry away the heat from the cooling plate 40, thus cooling the cooling plate 40.

[0060] In this embodiment, multiple fluid channels 41 are provided, and the multiple fluid channels 41 are arranged along the height direction of the base 10. Providing multiple fluid channels 41 can increase the contact area between air and the cooling plate 40, thereby improving the cooling efficiency of the cooling plate 40.

[0061] The cooling plate 40 includes a plate body 44 and a first heat-conducting layer 45 and a second heat-conducting layer 46 respectively attached to both sides of the plate body 44 in the thickness direction. The side of the first heat-conducting layer 45 facing away from the plate body 44 is attached to the base 10, and the side of the second heat-conducting layer 46 facing away from the plate body 44 is attached to the fixing part 21. The plurality of fluid channels 41 are recessed from the side of the plate body 44 toward the base 10.

[0062] The first heat-conducting layer 45 improves the heat transfer efficiency between the plate body 44 and the base 10, and the second heat-conducting layer 46 improves the heat transfer efficiency between the plate body 44 and the fixing part 21. Thus, the cooling plate 40 can quickly and effectively cool the base 10 and the fixing part 21. Multiple fluid channels 41 are designed to be recessed from the plate body 44 towards the base 10, facilitating the processing of the fluid channels 41. Furthermore, the multiple fluid channels 41 are separated from the base 10 by only one layer of the first heat-conducting layer 45, improving the cooling effect of the cooling plate 40 on the base 10.

[0063] As can be seen, the first heat-conducting layer 45 is sandwiched between the plate body 44 and the base 10, and the second heat-conducting layer 46 is sandwiched between the plate body 44 and the fixing part 21. Since the plate body 44 has a plurality of fluid channels 41 recessed on the side facing the base 10, the contact area between the plate body 44 and the first heat-conducting layer 45 is smaller than the contact area between the plate body 44 and the second heat-conducting layer 46. In this case, in order to avoid the plate body 44 crushing the first heat-conducting layer 45, in this embodiment, the compressive strength of the first heat-conducting layer 45 is greater than the compressive strength of the second heat-conducting layer 46.

[0064] In this embodiment, the main body 44 can be made of aluminum. Aluminum has excellent thermal conductivity and is also lightweight and easy to process. The first thermally conductive layer 45 can be made of thermally conductive foam, and the second thermally conductive layer 46 can be made of thermally conductive silicone.

[0065] In other embodiments of this utility model, the plurality of fluid channels 41 may also be recessed from the side of the plate body 44 near the fixing part 21. In this case, the first heat-conducting layer 45 is disposed between the plate body 44 and the fixing part 21, and the second heat-conducting layer 46 is disposed between the plate body 44 and the base 10.

[0066] In this embodiment, the driving device 100 includes at least two driving members 20, which are respectively disposed on opposite sides of the base 10. A sliding seat 30 is connected to the output portion 22 of each of the at least two driving members 20. The presence of at least two driving members 20 allows the driving device 100 to drive the sliding seat 30 to move on different sides, enabling the driving device 100 to drive more devices to move. A cooling plate 40 is provided between the fixing portion 21 of the driving member 20 located on the same side and the base 10. Two cooling plates 40 are provided on different sides, and the two cooling plates 40 on different sides can cool the two driving members 20 respectively.

[0067] One end of the fluid channel 41 of both cooling plates 40 is connected to the exhaust chamber 62. Thus, by setting an exhaust hood 60, air can flow within the fluid channel 41 of the two cooling plates 40.

[0068] Specifically, the driving device 100 includes four driving members 20, which are respectively disposed on opposite sides of the base 10. Two driving members 20 are provided on each side, and the two driving members 20 on each side are arranged along the length direction of the base 10. A cooling plate 40 is provided between the fixing part 21 of the two driving members 20 on the same side and the base 10. Other features of this embodiment can be referred to in the first embodiment, and will not be repeated here.

[0069] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0070] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A driving device, characterized in that, The device includes a base and a drive unit. The drive unit includes a fixed part connected to the base and an output part that moves relative to the fixed part. The drive device also includes a cooling plate disposed between the fixed part and the base, and in contact with at least a portion of the base and at least a portion of the fixed part.

2. The driving device according to claim 1, characterized in that, The cooling plate includes a plate body, a fluid channel formed inside the plate body, a channel inlet and a channel outlet connecting the inside and outside of the fluid channel.

3. The driving device according to claim 1, characterized in that, A fluid channel is formed within the cooling plate, and the fluid channel extends along the length of the base to both ends of the cooling plate; The drive device also includes an exhaust hood located on one side of the cooling plate along the length of the base. The exhaust hood includes an exhaust cavity formed therein and an exhaust port connecting the inside and outside of the exhaust cavity. The fluid channel connects the exhaust cavity.

4. The driving device according to claim 3, characterized in that, The driving device includes at least two driving members, which are respectively disposed on opposite sides of the base. The cooling plate is provided between the fixing part of the driving member on the same side and the base. One end of the fluid channel of the two cooling plates is connected to the exhaust chamber.

5. The driving device according to claim 3, characterized in that, The cooling plate includes a plate body, a first heat-conducting layer and a second heat-conducting layer respectively attached to both sides of the plate body in the thickness direction. The side of the first heat-conducting layer away from the plate body is attached to the base, and the side of the second heat-conducting layer away from the plate body is attached to the fixing part. The cooling plate has a plurality of fluid channels arranged along the height direction of the base, and the plurality of fluid channels are recessed from the side of the plate body facing the base.

6. The driving device according to claim 5, characterized in that, The compressive strength of the first thermally conductive layer is greater than that of the second thermally conductive layer.

7. The driving device according to claim 1, characterized in that, The base has a receiving groove for accommodating at least a portion of the cooling plate. The side of the cooling plate away from the fixing part contacts the bottom wall of the receiving groove, and the side of the fixing part facing the cooling plate contacts the cooling plate and the base.

8. The driving device according to claim 1, characterized in that, The base is made of marble.

9. The driving device according to claim 1, characterized in that, The driving component is a linear motor.

10. A screen printing device, characterized in that, Includes the drive device described in any one of claims 1-9.

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