A pressure head device and a method for installing a power module cover

Abstract

The present invention belongs to the field of power module assembly technology, and specifically relates to a pressure head device and a method for installing a power module cover plate, comprising a guide plate, four sub-pressure heads, four spiral slides and four driving mechanisms, wherein the four spiral slides are arranged in a matrix distribution on the guide plate, and two adjacent spiral slides are symmetrically arranged, and the four sub-pressure heads are correspondingly slidably arranged in the four spiral slides, and the four driving mechanisms are used to correspondingly drive the four sub-pressure heads to move along the spiral slides where they are located, and after the four sub-pressure heads move, the positions of the two adjacent sub-pressure heads in their corresponding spiral slides are symmetrical, and when pressure is applied to the target press-fitted part, the four sub-pressure heads move synchronously toward the target press-fitted part. The present invention can adapt to a variety of cover plates with different surface structural designs, has high compatibility, improves the degree of automation of the cover plate installation process, and has uniform pressure output, thereby improving the installation quality of the cover plate.

Description

Technical Field

[0001] The present invention belongs to the technical field of power module assembly, and in particular relates to a pressing head device and a method for installing a power module cover. Background Art

[0002] In the packaging structure of the power module, the tube shell and the cover plate are generally fixed by clips, and in the packaging process of the power module, the cover plate is generally pressed by driving the pressure head structure downward to make it engage with the tube shell. In order to ensure that each clip between the cover plate and the tube shell can be snapped into place, while avoiding the position of the terminals on the product lining, the pressure head structure in the current existing technology is generally a single fixed shape design adapted to a specific model of power module, which limits its application in multi-directional pressure stable output and precise control. Since the terminal positions of different models of power module products are different, in order to meet the packaging requirements of different models of power module products, the cover plate installation process in the existing packaging production line needs to design different shapes of pressure heads for backup. When switching the product to be packaged, the pressure head structure needs to be manually replaced, which is cumbersome to operate and will limit the degree of automation of the cover plate installation process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a pressure head device and a power module cover plate installation method that are adaptable to a variety of cover plates with different surface structure designs, have high compatibility, improve the degree of automation of the cover plate installation process, and have uniform pressure output to improve the installation quality of the cover plate.

[0004] The content of the present invention provides a pressing head device, including a guide plate, four sub-pressing heads, four spiral slide rails and four driving mechanisms. The four spiral slide rails are arranged in a matrix distribution on the guide plate, and the spiral slide rails adjacent to each other are symmetrically arranged. The four sub-pressing heads are correspondingly slidably arranged in the four spiral slide rails. The four driving mechanisms are used to correspondingly drive the four sub-pressing heads to move along the spiral slide rails where they are located. After the four sub-pressing heads move, the positions of the two adjacent sub-pressing heads in their corresponding spiral slide rails are symmetrical. When pressure is applied to the target press-fitted part, the four sub-pressing heads move synchronously toward the target press-fitted part.

[0005] Furthermore, each of the four sub-pressing heads is provided with a pressure sensing unit for detecting the pressure of the sub-pressing head when applying pressure to the target press-fitted part.

[0006] Furthermore, the four sub-pressing heads are each provided with a connecting piece, and the four sub-pressing heads are connected to four driving mechanisms through corresponding connecting pieces. The sub-pressing heads can move axially relative to the connecting pieces or the connecting pieces are a telescopic structure. The connecting pieces are each provided with a spring, and one end of the spring is in contact with the sub-pressing head.

[0007] Furthermore, the guide plate is provided with four spiral through grooves, and the four spiral through grooves correspond to four spiral slide rails. The four sub-pressure heads are located on one side of the guide plate, and one end of the connecting piece of the four sub-pressure heads is provided with a mating boss, and the mating boss slides through the corresponding spiral slide rails. One end of the spring is in contact with the mating boss on the sub-pressure head, and the four driving mechanisms are located on the other side of the guide plate.

[0008] Furthermore, the single driving mechanism includes a rotary driving assembly, a mating plate, a rotating block and a moving block, the rotating block is arranged on the surface of the mating plate and rotatably cooperates with the mating plate, the surface of the mating plate is provided with a curved slide groove around the rotating cooperation, the moving block slides and cooperates with the rotating block along the length direction of the rotating block, and the bottom of the rotating block is provided with a strip through groove extending along its own length direction, the bottom of the moving block is provided with a positioning piece, the positioning piece passes through the strip through groove and is located in the curved slide groove, and one end of the connecting piece back to the ion pressure head is connected to the moving block; the rotary driving assembly drives the rotating block and the mating plate to rotate relative to each other, and the moving block moves in the curved slide groove through the positioning piece and slides linearly along the rotating piece, thereby driving the sub-pressure head to move along the spiral slide rail.

[0009] Furthermore, the rotating block is provided with a wedge-shaped chute extending along its own length direction, the strip-shaped through groove is connected to the wedge-shaped chute, and the bottom of the moving block is provided with a wedge-shaped block, which is located in the wedge-shaped chute.

[0010] Furthermore, the sub-pressing head is made of plastic, and the end face diameter of the sub-pressing head is 5 mm.

[0011] The present invention further provides a method for installing a power module cover, which uses the above-mentioned pressing head device and includes the following steps:

[0012] S1. Identify the type of target cover to be installed, and based on the optimal pressure position preset according to the target cover type information, use four drive mechanisms to correspondingly drive four sub-pressing heads to move within corresponding spiral slides, so that the positions of the four sub-pressing heads correspond to the optimal pressure positions of the target cover;

[0013] S2. Drive the four sub-pressing heads to press down simultaneously to apply pressure to the target cover plate, so as to press the target cover plate to engage with the corresponding tube shell.

[0014] Furthermore, in S1, the type of the target cover plate to be installed is identified by the power module product identification code or the barcode of the power module tray.

[0015] Furthermore, when all four sub-pressure heads are provided with pressure sensing units, in S2, when the four sub-pressure heads press down simultaneously to apply pressure to the target cover plate, the pressure sensing units on the four sub-pressure heads detect the pressure values ​​in real time and feed back to the control system. The control system determines whether the pressures of the four sub-pressure heads are consistent and gives corresponding prompts.

[0016] The beneficial effect of the present invention is that, according to the different target cover plates, four driving mechanisms are used to drive four sub-pressing heads to move along the corresponding spiral slide rails to avoid the uneven areas and terminal holes on the target cover plates. The spiral tracks of the four sub-pressing heads can cover most of the positions on the surface of the cover plates, thereby adapting to a variety of cover plates with different surface structure designs. It has high compatibility and does not require frequent manual replacement of the press head structure when switching the required packaged products. The changeover operation process is simplified, the changeover efficiency is improved, and the degree of automation of the cover plate installation process is improved.

[0017] By having four sub-pressure heads acting on the surface of the cover plate at the same time, the positions of two adjacent sub-pressure heads in their corresponding spiral slide rails are symmetrical, which can form pressure output at four points evenly distributed on the surface of the cover plate, so that the four corners of the cover plate are pressurized evenly and stably, and can avoid the situation where the cover plate has warped corners or partially fails to fit after installation due to uneven pressure, thereby improving the installation quality of the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the first viewing angle of the pressure head device of the present invention.

[0019] Figure 2 This is a schematic structural diagram of the pressure head device of the present invention after removing the guide plate.

[0020] Figure 3 2 is a schematic structural diagram of the pressure head device of the present invention from a second perspective.

[0021] Figure 4 This is a schematic structural diagram of the pressure head device from a third perspective of the present invention.

[0022] In the figure: 1. Guide plate; 11. Spiral slide rail; 2. Sub-pressing head; 21. Matching boss; 3. Driving mechanism; 31. Matching plate; 311. Curved slide; 32. Rotating block; 321. Wedge-shaped slide; 322. Strip-shaped through groove; 33. Moving block; 331. Wedge-shaped block; 34. Transmission gear 1; 35. Drive gear 1; 36. Transmission gear 2; 37. Drive gear 2; 38. Mounting plate; 4. Connector; 5. Spring. DETAILED DESCRIPTION

[0023] like Figures 1-4As shown, the present invention provides a pressing head device, which includes a guide plate 1, four sub-pressing heads 2, four spiral slides 11 and four driving mechanisms 3. The four spiral slides 11 are arranged on the guide plate 1 in a matrix distribution. The spiral slides 11 adjacent to each other in the length or width direction of the matrix are symmetrically arranged, and the two spiral slides 11 in the diagonal direction of the matrix are centrally symmetrically arranged. The four sub-pressing heads 2 are slidably arranged in the four spiral slides 11 one by one, and the four driving mechanisms 3 are used to correspondingly drive the four sub-pressing heads 2 to move along the spiral slides 11 where they are located. The spiral slides 11 are used to guide and position the movement of the sub-pressing heads 2 to ensure that the movement of the sub-pressing heads 2 is a stable spiral trajectory. After the four sub-pressing heads 2 move, the positions of the two adjacent sub-pressing heads 2 in their corresponding spiral slides 11 are symmetrical. When pressure is applied to the target press-fitted part, the four sub-pressing heads 2 move synchronously toward the target press-fitted part. When used for installing the cover plate of the power module, the target press-fitted part is the target cover plate to be installed.

[0024] When the pressure head device provided by the present invention is applied to the installation of the cover plate, according to the different target cover plates, the four sub-pressure heads 2 are correspondingly driven by the four driving mechanisms 3 to move along the corresponding spiral slide rails 11, avoiding the uneven areas and terminal holes on the target cover plate, and the spiral tracks of the four sub-pressure heads 2 can cover most of the positions on the cover plate surface, thereby adapting to a variety of cover plates with different surface structure designs, greatly improving the applicability of the pressure head device, and having high versatility. When switching the required packaged products, there is no need to frequently manually replace the pressure head structure, simplifying the model change operation process, improving the model change switching efficiency, and improving the degree of automation of the cover plate installation process. By the four sub-pressure heads 2 acting on the cover plate surface at the same time, the positions of the two adjacent sub-pressure heads 2 in their corresponding spiral slide rails 11 are symmetrical, and pressure output at four points evenly distributed on the cover plate surface can be formed, so that the four corners of the cover plate are evenly and stably pressurized, and the situation that the cover plate is warped or partially not engaged after installation due to uneven pressure can be avoided, thereby improving the installation quality of the cover plate.

[0025] Each of the four sub-pressing heads 2 is provided with a pressure sensing unit for detecting the pressure of the sub-pressing heads 2 when applying pressure to the cover plate. The pressure sensing unit is specifically a pressure sensor, which is electrically connected to the control system and is used to detect the pressure value in real time and feed it back to the control system. The control system determines and monitors the consistency of the pressure of the four sub-pressing heads 2 during use, and issues an alarm if there is any inconsistency, so that the operator can make timely corrections and adjustments to ensure the levelness of the four sub-pressing heads 2 and the consistency of the pressure when applying pressure.

[0026] Each of the four sub-pressing heads 2 is provided with a connector 4, and the four sub-pressing heads 2 are connected to the four driving mechanisms 3 through the corresponding connectors 4. The sub-pressing heads 2 can move axially relative to the connector 4 or the connector 4 is a telescopic structure. The former is that one end of the connector 4 is axially inserted into the sub-pressing head 2, so that the sub-pressing head 2 can move axially relative to the connector 4, and the end of the connector 4 is provided with a limit platform to limit the axial movement stroke to ensure that the connector 4 and the sub-pressing head 2 will not be separated. The latter is that the connector 4 is a telescopic rod structure. Each of the connectors 4 is provided with a spring 5, one end of the spring 5 is in contact with the sub-pressing head 2, and the other end is fixed to the connector 4 or fixed by other positioning parts. Based on the setting of the spring 5, a certain elastic force can be generated when the sub-pressing head 2 is over-pressed, so that the sub-pressing head 2 enters the over-pressure protection state, avoiding the over-pressure force directly acting on the cover plate and damaging the cover plate.

[0027] The guide plate 1 is provided with four spiral grooves, and the four spiral grooves correspond to four spiral slides 11, and the spiral slides 11 are specifically circular spiral-shaped. The four sub-pressing heads 2 are located on one side of the guide plate 1, and one end of the connecting member 4 provided on the four sub-pressing heads 2 is provided with a mating boss 21, and the mating boss 21 slides through the corresponding spiral slide 11. One end of the spring 5 is specifically in contact with the mating boss 21 on the sub-pressing head 2, and the four driving mechanisms 3 are located on the other side of the guide plate 1. Based on this embodiment, the arrangement of the spiral slide 11 and the sliding mating structure with the sub-pressing head 2 are simpler, and the driving method and installation restrictions of the driving mechanism 3 are smaller.

[0028] In order to ensure the integrity of the pressing head device, the pressing head device can be provided with a mounting seat, the four driving mechanisms 3 are arranged in the mounting seat, and the guide plate 1 is fixed to the mounting seat.

[0029] The single drive mechanism 3 includes a rotary drive assembly, a mating plate 31, a rotating block 32, and a moving block 33. The rotating block 32 is located on the surface of the mating plate 31, and the bottom of one end of the rotating block 32 is rotatably engaged with the mating plate 31 via a rotating shaft. The point where the rotating shaft passes through is the point where the two rotate together. A curved sliding groove 311 is provided on the surface of the mating plate 31 around the point where the rotating shaft passes through. The direction from one end of the rotating block 32 that rotates with the mating plate 31 to the other end is the length direction of the rotating block 32. The moving block 33 slides with the rotating block 32 along the length direction of the rotating block 32, and a strip-shaped through-slot 322 is provided through the bottom of the rotating block 32. The length of the strip-shaped through-slot 322 extends along the length direction of the rotating block 32. A positioning piece is provided at the bottom of the moving block 33, which passes through the strip-shaped through groove 322 and extends into the curved slide groove 311. The end of the connecting piece 4 facing away from the ion pressure head 2 is connected to the moving block 33; the rotary drive assembly drives the rotating block 32 to rotate relative to the matching plate 31 along the surface of the matching plate 31 in the shape of a lever, and the moving block 33 moves in the curved slide groove 311 through the positioning piece and slides linearly along the rotating piece, thereby driving the sub-pressure head 2 to move along the spiral slide rail 11.

[0030] In one embodiment of the present invention, when the rotating block 32 and the mating plate 31 rotate relative to each other, the mating plate 31 remains stationary while the rotating block 32 rotates about its axis. In this embodiment, the curve of the curved chute 311 is a helical line corresponding to the shape of the spiral rail 11. The rotary drive element is a power module, which is a motor or other rotary drive structure. It directly drives the rotating block 32 via the axis, while the mating plate 31 is fixed to the mounting base.

[0031] In another embodiment of the present invention, when the rotating block 32 and the matching plate 31 rotate relative to each other, the matching plate 31 and the rotating block 32 both rotate, and the matching plate 31 and the rotating block 32 rotate at different speeds, forming a differential relative rotation. In this embodiment, the curve of the curved chute 311 is a curve extending in a spiral trend, that is, Figure 2As shown. This embodiment realizes the spiral movement trajectory of the sub-pressing block through the differential relative rotation of the matching plate 31 and the rotating block 32, and has higher stability. Preferably, the rotating drive member includes two sets of gear sets, one of which includes a transmission gear 1 34 and a drive gear 1 35 that are meshed with each other, and the other set includes a transmission gear 2 36 and a drive gear 2 37 that are meshed with each other. The transmission gear 1 34 and the drive gear 1 35 are both rotatably set on the mounting plate 38, and the transmission gear 2 36 is coaxially rotatably set on the transmission gear 1 34. The transmission gear 2 36 and the transmission gear 1 34 can rotate relative to each other, and the rotation axes of the two are on the same straight line. The matching plate 31 is fixedly set on the transmission gear 2 36, and the rotating shaft of the moving block 33 passes through the matching plate 31 and the transmission gear 2 36 and is fixed to the transmission gear 1 34. The moving block 33 rotates following the transmission gear 1 34. The drive gear 2 37 is coaxially fixed on the drive gear 1 35. The drive gear 2 37 rotates following the drive gear 1 35, and the rotation axes are on the same straight line. Transmission gear 1 34 and transmission gear 2 36 have different diameters and numbers of teeth, while drive gear 1 35 and drive gear 2 37 have different diameters and numbers of teeth. When drive gear 1 35 and drive gear 2 37 rotate, they drive transmission gear 1 34 and transmission gear 2 36 at different speeds, thereby achieving relative rotation of the rotating block 32 and the mating plate 31 at different speeds. Based on this arrangement, the same power module can drive the rotation of drive gear 1 35 and drive gear 2 37 in a single drive mechanism 3. The mounting plate 38 is fixedly mounted on the mounting base, and the power module can be mounted on the mounting plate 38 or the mounting base. The power module can be a motor or other rotary drive module.

[0032] The sliding cooperation structure of the rotating block 32 and the moving block 33 is specifically as follows: a wedge-shaped slot 321 is provided on the rotating block 32, and the wedge-shaped slot 321 is a slot with a wedge-shaped end face. The length direction of the wedge-shaped slot 321 extends along the length direction of the rotating block 32, and the strip-shaped through groove 322 is connected to the wedge-shaped slot 321. A wedge block 331 is provided at the bottom of the moving block 33, and the wedge block 331 is located in the wedge slot 321, that is, the corresponding sliding cooperation is achieved by the cooperation between the wedge block 331 and the wedge slot 321. This cooperation method is simple and can play a role of limiting in the vertical direction, thereby ensuring the reliability of its cooperation structure.

[0033] The sub-pressing head 2 is made of plastic, which has a certain hardness to ensure a good service life and avoid damage to the cover surface. The end diameter of the sub-pressing head 2 is preferably 5mm, ensuring that it can flexibly avoid uneven areas and pin holes on the cover while providing sufficient contact area for pressing down.

[0034] In the present invention, the downward pressure of the four sub-pressing heads 2 applies pressure to the cover plate, which in turn moves the entire press head assembly. During operation, the press head assembly is mounted on a downward pressure drive device in the cover plate installation station. This downward pressure drive device is electrically connected to a control system, which presets and controls the downward pressure height of the press head assembly. Within the press head assembly, the power modules of the four drive mechanisms 3 are all electrically connected to the control system, which coordinates and controls the corresponding control.

[0035] The present invention also provides a method for installing a power module cover, which uses the above-mentioned pressing head device and includes the following steps:

[0036] S1. Identify the type of target cover to be installed. Based on the optimal pressure position preset according to the type information of the target cover, drive the four sub-pressing heads 2 to move in the corresponding spiral slides 11 via the four driving mechanisms 3 so that the positions of the four sub-pressing heads 2 correspond to the optimal pressure positions of the target cover;

[0037] S2. Drive the four sub-pressing heads 2 to press down simultaneously to apply pressure to the target cover plate, so as to press the target cover plate to engage with the corresponding tube shell.

[0038] The power module cover installation method provided by the present invention can, based on the identified target cover type information, drive four sub-pressing heads 2 along corresponding spiral guide rails 11 to preset optimal positions via four drive mechanisms 3, avoiding uneven areas and terminal holes on the target cover. This method offers high compatibility and eliminates the need for frequent manual replacement of the press head structure when switching between packages. This simplifies the model change process, improves model switching efficiency, and enhances the automation level of the cover installation process. Furthermore, it can generate evenly distributed pressure output at four points on the cover surface, ensuring uniform and stable pressure at the four corners of the cover, thereby improving the quality of the cover installation.

[0039] In S1, the type of target cover to be installed is identified using the power module product identification code or the barcode on its pallet. The pallet is the tray used by the production line to support the corresponding structural components to be installed during power module installation. The identification tool is a barcode / identification code scanner or a vision system.

[0040] When all four sub-pressing heads 2 are equipped with pressure sensing units, in S2, when the four sub-pressing heads 2 simultaneously press down to apply pressure to the target cover plate, the pressure sensing units on the four sub-pressing heads 2 detect the pressure values ​​in real time and feed it back to the control system. The control system determines whether the pressures of the four sub-pressing heads 2 are consistent and issues an alarm if they are inconsistent, allowing the operator to make timely corrections and adjustments, ensuring the levelness of the four sub-pressing heads 2 and the consistency of the pressure when applying pressure, thereby further ensuring the installation quality of the cover plate. The judgment of pressure consistency can be preset within a certain error range. When the pressure difference of the four sub-pressing heads 2 is within this error range, the pressure is considered consistent.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0042] The one or more embodiments of this application are intended to encompass all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this application should be included in the scope of protection of this application.

Claims

1. A pressure head device, characterized in that: The invention comprises a guide plate (1), four sub-pressing heads (2), four spiral slides (11) and four driving mechanisms (3), wherein the four spiral slides (11) are arranged on the guide plate (1) in a matrix distribution, and the two adjacent spiral slides (11) are symmetrically arranged, and the four sub-pressing heads (2) are correspondingly slidably arranged in the four spiral slides (11), and the four driving mechanisms (3) are used to correspondingly drive the four sub-pressing heads (2) to move along the spiral slides (11) where they are located, and after the four sub-pressing heads (2) move, the two adjacent sub-pressing heads (2) are symmetrically positioned in their corresponding spiral slides (11), and when pressure is applied to a target press-fitted part, the four sub-pressing heads (2) move synchronously toward the target press-fitted part; The guide plate (1) is provided with four spiral through grooves, and the four spiral through grooves form four spiral slide rails (11) correspondingly. The four sub-pressing heads (2) are located on one side of the guide plate (1), and the four driving mechanisms (3) are located on the other side of the guide plate (1). Connecting members (4) are provided on the four sub-pressing heads (2), and the four sub-pressing heads (2) are connected to the four driving mechanisms (3) via corresponding connecting members (4). The single driving mechanism (3) comprises a rotary driving assembly, a matching plate (31), a rotating block (32) and a moving block (33); the rotating block (32) is arranged on the surface of the matching plate (31) and is rotationally matched with the matching plate (31); a curved sliding groove (311) is arranged on the surface of the matching plate (31) around the rotational matching position; the moving block (33) is slidably matched with the rotating block (32) along the length direction of the rotating block (32); and a strip-shaped through groove extending along the length direction of the rotating block (32) is provided through the bottom of the rotating block (32). (322), a positioning piece is provided at the bottom of the moving block (33), the positioning piece passes through the strip-shaped through groove (322) and is located in the curved slide groove (311), and one end of the connecting piece (4) backing the ion pressure head (2) is connected to the moving block (33); the rotary drive assembly drives the rotating block (32) and the matching plate (31) to rotate relative to each other, and the moving block (33) moves in the curved slide groove (311) through the positioning piece and slides linearly along the rotating piece, thereby driving the sub-pressure head (2) to move along the spiral slide rail (11).

2. The pressure head device according to claim 1, wherein: Each of the four sub-pressing heads (2) is provided with a pressure sensing unit for detecting the pressure of the sub-pressing head (2) when applying pressure to the target press-fitted part.

3. The pressure head device according to claim 1 or 2, characterized in that: The sub-pressing head (2) can move axially relative to the connecting member (4) or the connecting member (4) is a telescopic structure. A spring (5) is sleeved on the connecting member (4), and one end of the spring (5) abuts against the sub-pressing head (2).

4. The pressure head device according to claim 3, characterized in that: One end of the connecting piece (4) of each of the four sub-pressing heads (2) is provided with a matching boss (21), the matching boss (21) is slidably inserted into the corresponding spiral slide rail (11), and one end of the spring (5) is in contact with the matching boss (21) on the sub-pressing head (2).

5. The pressure head device according to claim 1, wherein: The rotating block (32) is provided with a wedge-shaped chute (321) extending along its length direction, the strip-shaped through groove (322) is connected to the wedge-shaped chute (321), and the bottom of the moving block (33) is provided with a wedge-shaped block (331), which is located in the wedge-shaped chute (321).

6. The pressure head device according to any one of claims 1, 2, 4 and 5, characterized in that: The sub-pressing head (2) is made of plastic, and the end face diameter of the sub-pressing head (2) is 5 mm.

7. A method for installing a power module cover, characterized in that: The installation method uses the pressure head device according to any one of claims 1 to 6 and includes the following steps: S1, identifying the type of target cover plate to be installed, and according to the optimal pressure position preset by the type information of the target cover plate, driving the four sub-pressing heads (2) to move in the corresponding spiral slide rails (11) through the four driving mechanisms (3), so that the positions of the four sub-pressing heads (2) correspond to the optimal pressure positions of the target cover plate; S2, driving the four sub-pressing heads (2) to press down simultaneously, applying pressure to the target cover plate, so as to press the target cover plate to engage with the corresponding tube shell.

8. The method for installing a power module cover according to claim 7, wherein: In S1, the type of the target cover plate to be installed is identified by the power module product identification code or the barcode of the power module tray.

9. The method for installing a power module cover according to claim 7, wherein: When the four sub-pressure heads (2) are all provided with pressure sensing units, in said S2, when the four sub-pressure heads (2) are pressed down simultaneously to apply pressure to the target cover plate, the pressure sensing units on the four sub-pressure heads (2) detect the pressure values ​​in real time and feed back to the control system, and the control system determines whether the pressures of the four sub-pressure heads (2) are consistent and gives corresponding prompts.

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