Pressing structure, power module and method for pressing parts in a pressing cavity

Abstract

The application provides a compression structure for compressing a part, a power module and a method for compressing a part in a compression cavity. The compression structure is used for compressing a part to a fixed plate, and comprises a plate structure, the part is fixed to a first surface of the plate structure, and an outer portion of the plate structure is provided with a base; at least one turning compression part is arranged between a second surface of the plate structure and the base, and is mounted on the second surface of the plate structure or the base, the turning compression part is used for converting external rotation movement around a first rotation axis into translational movement in a first direction, the first direction is perpendicular to the second surface of the plate structure, and the extension direction of the first rotation axis is perpendicular to the first direction; and at least one positioning device is mounted on a side surface of the plate structure and the base, so that the plate structure has a rotation degree of freedom around a second rotation axis relative to the base, and the extension direction of the second rotation axis is a second direction perpendicular to the first direction. The compression structure provided by the application can compress the part to the fixed plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power electronics, in particular to a compression structure. BACKGROUND

[0002] Informationization, intelligence and digitization are the current trends of human society development, which are crucial to improving the competitiveness of countries and enterprises. Meanwhile, the explosive growth of data centers as infrastructure also faces higher requirements for power supply, space management and heat dissipation. As an important part of data centers, power distribution systems are of great significance to ensure the reliable operation of data centers. Achieving high power density of power distribution systems is a breakthrough point to improve the performance of data centers.

[0003] As the core component of power distribution systems, power modules are an important link to effectively reduce the volume of power distribution systems and improve system reliability. The primary side and secondary side of the transformer are generally covered by an insulating material, which is large in volume and difficult to dissipate heat due to the poor thermal conductivity of the insulating material. Using a split transformer can effectively reduce the volume of the transformer, and the fan can directly blow to the magnetic core body and winding of the primary side and secondary side of the transformer, improving the heat dissipation capacity. However, when the transformer is used in a medium or high voltage power module, the primary side and secondary side of the transformer need to be fixed in an insulating shell. Because the operating space inside the shell cavity is small, it is difficult to install and position, making it difficult to achieve the fixation and clamping of the transformer. Moreover, due to manufacturing or assembly errors, there is a gap between the fixing plate and the magnetic core, which affects the excitation inductance value of the transformer. SUMMARY

[0004] To solve the above technical problems, the present application provides a compression structure for compressing a part, which can compress the part to a fixing plate.

[0005] To achieve the above purpose, the present application provides a compression structure for compressing a part, which is used to compress the part to a fixing plate, and the compression structure comprises:

[0006] a plate structure comprising a first face and a second face arranged oppositely, and a side face connected between the first face and the second face, the part being fixed to the first face of the plate structure, and an external base of the plate structure being provided with a base;

[0007] at least one turning compression member arranged between the second face of the plate structure and the base and mounted on the second face of the plate structure or the base, the turning compression member being used to convert the external rotational movement around a first rotation axis into translational movement in a first direction, wherein the first direction is perpendicular to the second face of the plate structure, and the extension direction of the first rotation axis is perpendicular to the first direction; and

[0008] At least one positioning device is installed on the side of the plate-shaped structure and the base, so that the plate-shaped structure has a degree of freedom of rotation around a second rotation axis relative to the base, the second rotation axis extending in a second direction perpendicular to the first direction.

[0009] In some embodiments, the compression structure is arranged in a cavity of a housing for compressing the parts in the cavity, the housing comprising four side walls connected in sequence to form the cavity.

[0010] The fixing plate is arranged in the cavity to divide the cavity into a first space and a second space, or the fixing plate is one of the four side walls.

[0011] In some embodiments, each of the turning and compressing members comprises:

[0012] A compression mechanism housing comprising a slope and a threaded hole;

[0013] A transmission slope block cooperating with the slope of the compression mechanism housing;

[0014] A tightening bolt passing through the threaded hole of the compression mechanism housing and abutting against the transmission slope block; and

[0015] A compression plate arranged on a side of the transmission slope block away from the compression mechanism housing.

[0016] When the tightening bolt is rotated along the first rotation axis, the tightening bolt moves along the extension direction of the first rotation axis to push the transmission slope block to slide along the slope of the compression mechanism housing, so that the compression plate contacts with the side wall of the housing to generate a compression force.

[0017] In some embodiments, the turning and compressing member further comprises a motion positioning block, a pin, and a first spring,

[0018] The transmission slope block and the motion positioning block are respectively arranged on two sides of the slope of the compression mechanism housing and connected by the pin.

[0019] An elongated slot is formed on the slope of the compression mechanism housing, and the pin is arranged through the elongated slot.

[0020] An elongated groove corresponding to the elongated slot is formed on the contact slope of the transmission slope block cooperating with the slope of the compression mechanism housing, and a pin hole is formed at one end of the elongated groove, and the pin is arranged in the pin hole.

[0021] The first spring is arranged between the pin hole and the other end of the long groove to provide a reset force for the sliding of the transmission wedge.

[0022] In some embodiments, the steering pressure device further comprises a pressure rod and a second spring.

[0023] The transmission wedge and the pressure plate are connected through the pressure rod, and the pressure rod is screwed through the transmission wedge and the pressure plate;

[0024] The second spring is sleeved on the pressure rod between the transmission wedge and the pressure plate;

[0025] The transmission wedge drives the pressure plate, the pressure rod and the second spring to slide together along the inclined surface of the pressure mechanism shell;

[0026] When the tightening bolt continues to rotate along the first rotation axis, the pressure plate compresses the second spring and presses the plate structure in the first direction until the part is pressed against the fixed plate.

[0027] In some embodiments, each positioning device comprises a positioning member and a corresponding positioning sleeve member sleeved outside the positioning member, the second rotation axis is the rotation axis of the positioning member, and the second rotation axis is perpendicular to the side surface of the plate structure.

[0028] In some embodiments, the positioning member is fixed to the side surface of the plate structure, and the positioning sleeve member is fixed to the base; or the positioning sleeve member is fixed to the side surface of the plate structure, and the positioning member is fixed to the base.

[0029] In some embodiments, a first reserved gap is provided between the positioning sleeve member and the positioning member in the second direction, and a second reserved gap is provided in a radial direction perpendicular to the second direction, so that the plate structure has a degree of freedom of rotation around the second rotation axis and a degree of freedom of rotation around a third rotation axis extending in a third direction perpendicular to the first direction and the second direction.

[0030] In some embodiments, the plate structure is provided with a heat sink for heat dissipation.

[0031] In some embodiments, the plate structure and the part are fixed by bolt connection or adhesive bonding.

[0032] In some embodiments, the base is a separate structure from the shell, located between the plate structure and the side wall of the shell, and has a through hole for the pressing plate of the turning pressing member to extend out of the through hole and abut against the side wall of the shell, and the base comprises at least one surface for fixing the positioning device.

[0033] In some embodiments, the base is formed by the side wall of the shell, and the plate structure is mounted on the side wall of the shell by the positioning device.

[0034] In some embodiments, the number of the turning pressing members is two, and the two turning pressing members are respectively arranged at the upper and lower ends of the plate structure; or

[0035] The number of the turning pressing members is one, and the turning pressing member is arranged at the middle of the plate structure.

[0036] In some embodiments, the part is a transformer or an IGBT.

[0037] The application further provides a power module, which comprises a shell, a high-voltage circuit, a low-voltage circuit and a transformer.

[0038] The shell comprises four side walls and a fixing plate, the four side walls are sequentially connected to form a cavity, and the fixing plate is arranged in the cavity to divide the cavity into a first space and a second space.

[0039] The high-voltage circuit is electrically connected to the primary side of the transformer, the low-voltage circuit is electrically connected to the secondary side of the transformer, the high-voltage circuit and the primary side of the transformer are located in the first space, and the low-voltage circuit and the secondary side of the transformer are located in the second space.

[0040] The primary side of the transformer and the secondary side of the transformer are respectively tightly attached to the fixing plate by using the pressing structure.

[0041] The application further provides a method for pressing a part in a cavity, which comprises the following steps:

[0042] A pressing structure is provided, and the pressing structure is the pressing structure as described above.

[0043] The pressing structure is placed in the cavity of the shell, and at this time, there are gaps between the part and the fixing plate and between the pressing plate of the turning pressing member and the side wall of the shell.

[0044] A screwdriver is inserted into the port of the shell, and the bolt is rotated and tightened, so that the tightening bolt moves along its axial direction to push the transmission inclined block to slide along the inclined surface, and then the compression plate on the transmission inclined block slides together with the transmission inclined block until it is attached to the side wall of the shell;

[0045] The screwdriver is continuously rotated, so that the compression plate extrudes the side wall of the shell to generate a reaction force to push the part gradually close to the fixed plate until it is attached. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0047] Figure 1-2 It is a structural schematic diagram of a power module;

[0048] Figure 3 It is a structural schematic diagram of the compression structure shown in the first embodiment of the present application;

[0049] Figure 4 It is a partial structural schematic diagram of the compression structure shown in the first embodiment of the present application, in which part of the base is omitted;

[0050] Figure 5 It is an exploded view of the compression structure shown in the first embodiment of the present application;

[0051] Figure 6 It is a structural schematic diagram of the compression structure shown in the first embodiment of the present application from another perspective;

[0052] Figure 7 (a) and (b) are structural schematic diagrams of the compression structure shown in the first embodiment of the present application before and after being installed in the shell;

[0053] Figure 8 It is a sectional view of the steering compression part shown in the first embodiment of the present application;

[0054] Figure 9 It is an exploded view of the steering compression part shown in the first embodiment of the present application;

[0055] Figure 10 It is a structural schematic diagram of the transmission inclined block and the compression mechanism shell shown in the first embodiment of the present application;

[0056] Figure 11 It is a sectional view of the compression structure along the AA direction in (b) after being installed in the shell; Figure 7 ​

[0057] Figure 12 The clamping structure for inserting a screwdriver is installed in the housing along the rear edge. Figure 7 (b) Sectional view along direction AA;

[0058] Figure 13 for Figure 12 A partial magnification of the structure shown Figure 1 ;

[0059] Figure 14 for Figure 12 A partial magnification of the structure shown Figure 2 The dashed line represents the contact slope between the transmission swashplate and the housing of the clamping mechanism;

[0060] Figure 15 for Figure 12 Layout enlargement of the structure shown Figure 3 The transformer core gradually approaches the fixing plate until it is in contact with it;

[0061] Figure 16 for Figure 12 A partial magnification of the structure shown Figure 4 The gap between the transmission swash block and the pressure plate gradually decreases.

[0062] Figure 17 (a)-17(c) are schematic diagrams of the clamping structure shown in the second embodiment of the present invention;

[0063] Figure 18 This is a schematic diagram of the overall structure when the clamping structure shown in the third embodiment of the present invention is directly fixed to the outer shell;

[0064] Figure 19 This is a schematic diagram of the overall structure from another perspective when the clamping structure shown in the third embodiment of the present invention is directly fixed to the outer shell;

[0065] Figure 20 (a)-20(b) are schematic diagrams of the clamping structure when the number of steering clamping parts is 1, as shown in the fourth embodiment of the present invention;

[0066] in:

[0067] a - Primary side of the transformer; b - Secondary side of the transformer; c - High-voltage circuit; d - Low-voltage circuit;

[0068] D - Thickness of the fixed plate; m - First rotation axis; n - Second rotation axis; r - Third rotation axis;

[0069] ll - First direction; oo - Second direction; pp - Third direction;

[0070] 1'-Outer shell; 1'1'-Fixing plate; 1'2'-First space; 1'3'-Second space;

[0071] 1 - compression structure; 11 - plate structure;

[0072] 111 - first face of plate structure; 112 - second face of plate structure; 113 - side face of plate structure; 12 - base; 121 - through hole;

[0073] 13 - steering compression member;

[0074] 131 - compression mechanism housing; 1311 - inclined surface; 1312 - threaded hole; 1313 - elongated slot;

[0075] 132 - transmission inclined block; 1321 - elongated groove; 1322 - pin hole;

[0076] 133 - tightening bolt; 134 - compression plate; 135 - movement positioning block; 136 - pin; 137 - first spring; 138 - compression rod; 139 - second spring;

[0077] 14 - positioning device; 141 - positioning member; 142 - positioning sleeve;

[0078] 143 - first reserved gap; 144 - second reserved gap; 15 - screwdriver;

[0079] 2 - housing; 21 - fixed plate; 22 - first space; 23 - second space;

[0080] 3 - part; 4 - gap between part and fixed plate; 5 - gap between compression plate and side wall of housing; 6 - gap between transmission inclined block and compression plate. DETAILED DESCRIPTION

[0081] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments, so as to further understand the purposes, solutions and effects of the present application, but not as a limitation on the protection scope of the appended claims of the present application.

[0082] In the description and the following claims, some words are used to refer to specific components or parts, and those skilled in the art should understand that the same components or parts can be referred to by different names or terms by the user or manufacturer. The description and the following claims do not distinguish components or parts by name, but by functional differences. Throughout the description and the following claims, "including" and "containing" are open terms, which should be interpreted as "including but not limited to". In addition, the term "connected" herein includes any direct and indirect electrical connection means. Indirect electrical connection means includes connection through other devices.

[0083] It should be noted that in the description of the present application, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and "about", or "approximately", "substantially", "left and right", and the like indicate the orientation or positional relationship or parameters and the like based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description content, and do not indicate or imply that the devices or elements referred to must have a particular orientation, a particular size or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0084] Referring to Figure 1-2 , Figure 1-2 is a structural schematic view of a power module. As shown in Figure 1-2 , the power module includes a shell 1', a high-voltage circuit c, a low-voltage circuit d, and a transformer, the transformer including a primary side part a and a secondary side part b, the primary side part a and the secondary side part b including a magnetic core and a winding respectively, a fixing plate 1'1' being arranged in a cavity of the shell 1', dividing the cavity of the shell 1' into a first space 1'2' and a second space 1'3', the primary side part a of the transformer and the high-voltage circuit c being located in the first space 1'2', and the secondary side part b of the transformer and the low-voltage circuit d being located in the second space 1'3'; the primary side part a and the secondary side part b of the transformer need to be fixed on both sides of the fixing plate 1'1', and due to the small operation space in the cavity, the installation and positioning of the transformer are difficult, and it is difficult to realize the fixation and clamping of the magnetic core of the transformer; and because of manufacturing or assembly errors, for example, the fixing plate 1'1' is prone to deformation, the transformer is not installed in place, resulting in that the distance between the primary side part a and the secondary side part b of the transformer is greater than the thickness D of the fixing plate 21, which will affect the excitation inductance value of the transformer. Therefore, a pressing structure is needed to tightly fix the primary side part a and the secondary side part b of the transformer to the fixing plate 21. The pressing structure will be described in detail below.

[0085] Referring to Figure 3-6 , Figure 3 is a structural schematic view of the pressing structure shown in the first embodiment of the present application; Figure 4 is a partial structural schematic view of the pressing structure shown in the first embodiment of the present application, in which part of the base is omitted; Figure 5 is an exploded view of the pressing structure shown in the first embodiment of the present application; Figure 6 is a structural schematic view of the pressing structure shown in the first embodiment of the present application from another perspective. As shown in Figure 3-6As shown, the pressing structure 1 is used to press a part 3 to a fixed plate 21 in a cavity of a shell 2, the pressing structure 1 comprises a plate structure 11, at least one turning pressing member 13 and at least one positioning device 14, the plate structure 11 comprises a first face 111, a second face 112 and a side face 113 connected between the first face 111 and the second face 112, the part 3 is fixed to the first face 111 of the plate structure 11, and a base 12 is arranged outside the plate structure 11. The turning pressing member 13 is arranged between the second face 112 of the plate structure 11 and the base 12, and is mounted on the second face 112 of the plate structure 11 or the base 12, the turning pressing member 13 is used to convert the external rotation movement around a first rotation axis m into the translational movement along a first direction l-l, wherein the first direction l-l is perpendicular to the second face 112 of the plate structure 11, and the extension direction of the first rotation axis m is perpendicular to the first direction l-l, for example, as shown in the embodiment, the extension direction of the first rotation axis m can be a second direction o-o, but in other embodiments, the extension direction of the first rotation axis m can also deviate from the second direction o-o, and the extension direction of the first rotation axis m is the insertion direction of a screwdriver 15. The positioning device 14 is mounted on the side face 113 of the plate structure 11 and the base 12, so that the plate structure 11 has the rotation freedom around a second rotation axis n relative to the base 12, and the extension direction of the second rotation axis n is the second direction o-o perpendicular to the first direction l-l. The embodiment realizes the conversion of the force direction through the turning pressing member 13, which facilitates the fastening operation in a narrow space; the plate structure 11 and the part 3 on the first face 111 thereof rotate around the second rotation axis n through the positioning device 14, so that the part 3 closely contacts the fixed plate 21, the error in the first direction l-l is reduced, and when the part 2 is a transformer, the excitation inductance of the transformer can be improved, for example, by about 5%.

[0086] In the embodiment, the pressing structure 1 is arranged in the cavity of the shell 2 and is used to press the part 3 in the cavity. However, in other embodiments, the pressing structure can also be used to press the part to the fixed plate in an open space, and is not limited to being arranged in the cavity of the shell.

[0087] In the embodiment, the second face 112 of the plate structure 11 is provided with a heat dissipation fin, which can be used to dissipate heat for the part 3, and the plate structure 11 is also a good conductor of heat. The plate structure 11 and the part 3 are fixed by the bolt connection or the adhesive connection. The part 3 is the primary side a and the secondary side b of the transformer; however, in other embodiments, the part 3 can also be an IGBT, etc. The application does not limit the types of the part 3 and the specific styles of the plate structure 11, and does not limit the fixing mode between the plate structure 11 and the part 3.

[0088] In the embodiment, each positioning device 14 comprises a positioning member 141 and a positioning sleeve member 142 corresponding to the positioning member 141, the second rotation axis n is the rotation axis of the positioning member 141, and the second rotation axis n is perpendicular to the side surface of the plate-shaped structure 11. It should be noted that the second rotation axis n in the embodiment can be parallel to the first rotation axis m or can have a certain angle with the first rotation axis m. The positioning member 141 is fixed to the side surface of the plate-shaped structure 11, and the positioning sleeve member 142 is fixed to the base 12. In other embodiments, the positioning sleeve member 142 can be fixed to the side surface of the plate-shaped structure 11, and the positioning member 141 can be fixed to the base 12.

[0089] In the embodiment, as shown in Figure 6 , the base 12 is a separate structure member different from the shell 2 and is located between the plate-shaped structure 11 and the side wall of the shell 2. The base 12 is provided with a through hole 121, so that the pressing plate 134 of the turning and pressing member 13 extends out of the through hole 121 and abuts against the side wall of the shell 2. The base 12 comprises at least one surface for fixing the positioning device 14. The base 12 can be formed by a sheet metal bending process, or can be formed by an injection molding process or a machining process. The base 12 and the plate-shaped structure 11 can be connected together by the positioning device 14 to form an integrated sub-assembly, which can be matched with different shells, is modular in design, has good universality, and can be applied to other parts that need to be clamped.

[0090] Referring to Figure 7 (a)-7(b), Figure 7 (a)-7(b) are structure schematic diagrams of the pressing structure shown in the first embodiment of the application before and after being loaded into the shell. As shown in Figure 7 (a)-7(b), the shell 2 comprises four side walls connected in sequence to form the cavity. The fixing plate 21 is arranged in the cavity and divides the cavity into a first space 22 and a second space 23. It should be noted that in other embodiments, the fixing plate 21 can also be one of the four side walls, and the pressing structure 1 of the application is used to press the part 3 against the side wall of the shell 2.

[0091] In the embodiment, when the pressing structure 1 is used to press the primary side of the transformer and the secondary side of the transformer against the fixing plate 21 respectively, the whole structure is as shown in Figure 1-2The power module shown. Specifically, the power module includes a housing 2, a high-voltage circuit c, a low-voltage circuit d and a transformer, the transformer includes a primary side a and a secondary side b. Among them, the housing 2 includes four side walls and a fixed plate 21, the four side walls are connected in turn to form a cavity, the fixed plate 21 is arranged in the cavity, the cavity is divided into a first space 22 and a second space 23; the high-voltage circuit c is electrically connected to the primary side a of the transformer, the low-voltage circuit d is electrically connected to the secondary side b of the transformer, the high-voltage circuit c and the primary side a of the transformer are located in the first space 22, and the low-voltage circuit d and the secondary side b of the transformer are located in the second space 23.

[0092] Referring to Figure 8-10 , Figure 8 is a sectional view of the steering compression member shown in the first embodiment of the present application; Figure 9 is an exploded view of the steering compression member shown in the first embodiment of the present application; Figure 10 is a structural schematic diagram of the transmission inclined block and the compression mechanism shell shown in the first embodiment of the present application. As Figure 8-10 shown, each of the steering compression members 13 in this embodiment includes a compression mechanism shell 131, a transmission inclined block 132, a tightening bolt 133 and a compression plate 134, the compression mechanism shell 131 includes a slope 1311 and a threaded hole 1312; the transmission inclined block 132 cooperates with the slope 1311 of the compression mechanism shell 131; the tightening bolt 133 passes through the threaded hole 1312 of the compression mechanism shell 131 and abuts against the transmission inclined block 132; the compression plate 134 is installed on the side of the transmission inclined block 132 away from the compression mechanism shell 131; wherein when the tightening bolt 133 is rotated along the first rotation axis m, the tightening bolt 133 moves along its axis direction to push the transmission inclined block 132 to slide along the slope 1311 of the compression mechanism shell 131, so that the compression plate 134 contacts with the side wall of the housing 2, thereby generating a compression force.

[0093] The steering pressure piece 13 in the embodiment further comprises a motion positioning block 135, a pin 136 and a first spring 137, wherein the transmission inclined block 132 and the motion positioning block 135 are respectively arranged on both sides of the inclined surface 1311 of the pressure mechanism shell 131 and are connected by the pin 136; an elongated slot 1313 is formed on the inclined surface 1311 of the pressure mechanism shell 131, and the pin 136 is arranged through the elongated slot 1313; an elongated groove 1321 corresponding to the elongated slot 1313 is formed on the contact inclined surface of the transmission inclined block 132 and the pressure mechanism shell inclined surface 1311, and a pin hole 1322 is formed at one end of the elongated groove 1321, and the pin 136 is arranged in the pin hole 1322; the first spring 137 is arranged between the pin hole 1322 and the other end of the elongated groove 1321, and is used to provide a reset force for the sliding of the transmission inclined block 132.

[0094] The steering pressure piece 13 in the embodiment further comprises a pressure rod 138 and a second spring 139; the transmission inclined block 132 and the pressure plate 134 are connected by the pressure rod 138, and the pressure rod 138 is threadedly connected through the transmission inclined block 132 and the pressure plate 134, so as to prevent the pressure plate 134 from falling off; the second spring 139 is sleeved on the pressure rod 138 between the transmission inclined block 132 and the pressure plate 134; the transmission inclined block 132 is used to drive the pressure plate 134, the pressure rod 138 and the second spring 139 to slide together along the inclined surface 1311 of the pressure mechanism shell 131; when the tightening bolt 133 is continuously rotated along the first rotation axis m, the pressure plate 134 compresses the second spring 139, and the plate-shaped structure 11 is pressed in the first direction l-l until the part 3 is pressed against the fixed plate 21.

[0095] Referring to Figure 11-16 , Figure 11 the cross-sectional view along the AA direction in (b) of the pressure structure after being arranged in the shell; Figure 7 (b) in the direction of AA; Figure 12 the cross-sectional view along the AA direction in (b) of the pressure structure after being arranged in the shell; Figure 7 (b) in the direction of AA; Figure 13 the enlarged view of the structure shown in Figure 12 ; Figure 1 ; Figure 14 the enlarged view of the structure shown in Figure 12 , wherein the dashed line is the contact inclined surface of the transmission inclined block and the pressure mechanism shell; Figure 2 the enlarged view of the structure shown in Figure 15 , wherein the transformer magnetic core gradually approaches the fixed plate until it is attached; Figure 12 the enlarged view of the structure shown in Figure 3 , wherein the transformer magnetic core gradually approaches the fixed plate until it is attached;Figure 16 For Figure 12 Partial enlargement of the structure shown Figure 4 Where the gap between the transmission inclined block and the compression plate gradually becomes smaller. As Figure 11-16 shown, another embodiment of the present application provides a method for compressing parts in the cavity of the shell, which comprises the following steps: providing a compression structure 1, which is any one of the compression structures 1 described in the previous embodiments; placing the compression structure 1 in the cavity of the shell 2, at this time, there is a gap between the part 3 and the fixed plate 21, and between the compression plate 134 of the deflection compression member 13 and the side wall of the shell 2; inserting a screwdriver 15 from the port of the shell and rotating the tightening bolt 133 to make the tightening bolt 133 move along its axis direction, i.e. the extension direction of the first rotation axis, so as to push the transmission inclined block 132 to slide along the inclined surface, and then the compression plate 134 on the transmission inclined block 132 slides together with the transmission inclined block 132 until it is attached to the side wall of the shell 2; continuing to rotate the screwdriver 15 to make the compression plate 134 press the side wall of the shell 2, thereby generating a reaction force to push the part 3 to gradually attach to the fixed plate 21 in the middle of the shell cavity until it is attached.

[0096] The method in the above embodiments is described in detail as follows, as Figure 11-13 shown, the compression structure 1 is placed in the cavity of the shell 2, at this time, there is a gap 4 between the part 3 and the fixed plate 21, and there is a gap 5 between the compression plate 134 of the deflection compression member 13 and the side wall of the shell 2; a screwdriver 15 is inserted from the port of the shell 2, and the tightening bolt 133 is started to be rotated. As Figure 14 shown, the screwdriver 15 rotates the tightening bolt 133 to make it move along its axis direction, thereby pushing the transmission inclined block 132 to slide along the inclined surface 1311, and the transmission inclined block 132, the compression plate 134, the compression rod 138 and the second spring 139 form an integral whole, so that the compression plate 134 will slide together with the transmission inclined block 132 until it is attached to the side wall of the shell 2. As Figure 15 shown, at this time, because the compression plate 134 has contacted the side wall of the shell 2, continuing to rotate the screwdriver 15 will make the compression plate 134 press the side wall of the shell 2, thereby generating a reaction force F to push the part 3 to gradually attach to the fixed plate 21 in the middle of the shell cavity until it is attached; in this process, as Figure 16As shown, continue to rotate the screwdriver 15, at this time the transmission inclined block 132 and the crimping plate 134 will generate relative motion, that is, the transmission inclined block 132 gradually approaches the crimping plate 134, that is, the gap 6 between the transmission inclined block 132 and the crimping plate 134 gradually becomes smaller, at this time the second spring 139 is compressed, and finally the tightening bolt 133 is tightened, at this time the compression amount of the second spring 139 is L, the elastic coefficient of the second spring is k, and the elastic force generated by the second spring is F1=F1=kL, according to the force analysis, the pressure received by the part 3 is also F1. By adjusting the elastic coefficient k of the second spring 139, the compression amount L can be adjusted in size according to the definition, and the elastic coefficient can also be defined according to the demand, so adjusting the size of the elastic coefficient k and the compression amount L can control the size of the elastic force F1 of the second spring 139, that is, the size of the final compression force can be accurately controlled to achieve accurate control.

[0097] Referring to Figure 17 (a)-17(c), Figure 17 (a)-17(c) is a structural schematic diagram of a compression structure according to the second embodiment of the present application, as Figure 17 As shown in (a)-17(c), in the second embodiment of the present application, a first reserved gap 143 is arranged between the positioning sleeve 142 and the positioning piece 141 along the second direction o-o, and a second reserved gap 144 is arranged along the radial direction perpendicular to the second direction o-o, so that the plate-shaped structure 11 has a degree of freedom of rotation around the second rotation axis n and a degree of freedom of rotation around the third rotation axis r extending along the third direction p-p perpendicular to the first direction l-l and the second direction o-o. In this embodiment, the positioning piece 141 and the positioning sleeve 142 cooperate to enable the plate-shaped structure 11 to rotate around the second rotation axis n parallel to the second direction o-o, and at the same time, due to the existence of the first reserved gap 143 and the second reserved gap 144, the rotation axis of the positioning piece 141 can move in all directions within the positioning sleeve 142, thereby enabling the plate-shaped structure 11 to rotate around the third rotation axis r parallel to the third direction p-p. Since the plate-shaped structure 11 can translate in all directions and rotate around all axes, the plate-shaped structure 11 can be fine-tuned in more directions and angles, thereby ensuring that the part 3 (for example, the magnetic core of the transformer) is tightly attached to the fixed plate 21, and further improving the excitation inductance of the transformer.

[0098] Referring to Figure 18-19 , Figure 18 Fig. 5 is a schematic diagram of the overall structure of the compression structure according to the third embodiment of the present application when directly fixed on the shell; Figure 19 Fig. 6 is a schematic diagram of the overall structure of the compression structure according to the third embodiment of the present application from another perspective when directly fixed on the shell. As Figure 18-19As shown, in the present embodiment, the base 12 is constituted by the side wall of the shell 2, and the side wall of the shell 2 is provided with an opening for mounting the positioning device 14, and the plate-shaped structure 11 is mounted on the side wall of the shell 2 through the positioning device 14. By using the side wall of the shell 2 instead of a separate base 12, the structure is simple, and can be used for low-voltage products with low requirements for electrical clearance and creepage.

[0099] As shown, in the present embodiment, the base 12 is constituted by the side wall of the shell 2, and the side wall of the shell 2 is provided with an opening for mounting the positioning device 14, and the plate-shaped structure 11 is mounted on the side wall of the shell 2 through the positioning device 14. By using the side wall of the shell 2 instead of a separate base 12, the structure is simple, and can be used for low-voltage products with low requirements for electrical clearance and creepage.

[0100] The present application provides a fourth embodiment, which is shown in Figure 20 (a)-20(b), Figure 20 (a)-20(b) is a structural schematic diagram of the pressing structure when the number of the turning pressing members is 1 in the fourth embodiment of the present application. As shown in Figure 20 As shown in (a)-20(b), in the present embodiment, the number of the turning pressing members 13 can be one, and the turning pressing member 13 is arranged at the middle position of the plate-shaped structure 11. By arranging the turning pressing member 13 at the middle position of the plate-shaped structure 11 and reducing the number to one, the structure is simplified, and the number of parts is reduced, thereby reducing the cost. It should be noted that, in order to ensure that the parts are pressed, the width of the turning pressing member 13 needs to be appropriately increased.

[0101] In summary, the pressing structure provided by the embodiments of the present application can press the parts to the fixing plate, so that there is no gap between the parts and the fixing plate of the shell, and at the same time, the clamping force is provided to ensure that the parts and the fixing plate of the shell will not be separated in the vibration state. Especially in the technical field of power distribution system parts, the pressing of the transformer inside the power module can be effectively realized, so that the traditional integrated cast transformer is converted into a split type, thereby effectively reducing the volume of the module, the primary side and the secondary side of the transformer are closely fixed to the fixing plate, there is no gap between the primary side and the secondary side of the transformer and the fixing plate, the gap size of the magnetic core between the primary side and the secondary side is ensured, and a certain clamping force is provided to ensure that the magnetic core and the fixing plate will not be separated in the vibration state. At the same time, it is beneficial to heat dissipation, so that the power module can further improve the power, and the overall competitiveness of the product is also improved, thereby improving the market share.

[0102] By setting the reserved gap between the positioning assembly and the positioning piece, the plate-shaped structure and the parts on the first surface thereof can be rotated, the magnetic core is tightly fitted with the insulating plate, the error is reduced, and the excitation inductance of the transformer is improved; the force is diverted by the turning and pressing piece, so that the fastening operation in a narrow space is facilitated; by selecting the elastic coefficient of the spring inside the turning and pressing piece, the pressure between the magnetic core and the fixed plate of the insulation can be controlled; by connecting the base and the plate-shaped structure, an integrated sub-assembly is formed, which can be matched with different housings, is modularized in design, is good in universality, and can be applied to other parts that need to be clamped.

[0103] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any person skilled in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application, according to the technical essence of the present application, still belongs to the protection scope of the technical solution of the present application.

Claims

1. A clamping structure of a clamping member, characterized by: The pressing structure is used for pressing a part to a fixed plate, and comprises: a plate structure comprising a first surface and a second surface arranged oppositely, and a side surface connected between the first surface and the second surface, the part being fixed to the first surface of the plate structure, and an external base being arranged on the plate structure; at least one turning pressing member arranged between the second surface of the plate structure and the base, and mounted on the second surface of the plate structure or the base, the turning pressing member being used for converting an external turning movement around a first rotation axis into a translational movement in a first direction, wherein the first direction is perpendicular to the second surface of the plate structure, and an extension direction of the first rotation axis is perpendicular to the first direction; each of the turning pressing members comprises: a pressing mechanism housing comprising a slope and a threaded hole; a transmission slope block matched with the slope of the pressing mechanism housing; a tightening bolt passing through the threaded hole of the pressing mechanism housing and abutting against the transmission slope block; and a pressing plate mounted on a surface of the transmission slope block away from the pressing mechanism housing; and at least one positioning device mounted on the side surface of the plate structure and the base, so that the plate structure has a degree of freedom of turning around a second rotation axis relative to the base, and an extension direction of the second rotation axis is a second direction perpendicular to the first direction; each of the positioning devices comprises a positioning member and a positioning sleeve member corresponding to the positioning member and sleeved outside the positioning member, the second rotation axis being an axis of rotation of the positioning member, and the second rotation axis being perpendicular to the side surface of the plate structure; wherein the positioning member is fixed to the side surface of the plate structure, and the positioning sleeve member is fixed to the base, or the positioning sleeve member is fixed to the side surface of the plate structure, and the positioning member is fixed to the base.

2. The compacted structure of claim 1, wherein: The pressing structure is arranged in a cavity of a shell, and is used for pressing the part in the cavity, the shell comprising four side walls connected in sequence to form the cavity; the fixed plate is arranged in the cavity to divide the cavity into a first space and a second space; or the fixed plate is one of the four side walls.

3. The compacted structure of claim 2, wherein: When the tightening bolt is rotated along the first rotation axis, the tightening bolt moves along the extension direction of the first rotation axis to push the transmission slope block to slide along the slope of the pressing mechanism housing, so that the pressing plate contacts with the side wall of the shell to generate a pressing force.

4. The compacted structure of claim 3, wherein: The turning pressing member further comprises a movement positioning block, a pin, and a first spring, wherein the transmission slope block and the movement positioning block are arranged on two sides of the slope of the pressing mechanism housing respectively, and are connected by the pin; an elongated slot is arranged on the slope of the pressing mechanism housing, and the pin passes through the elongated slot; an elongated groove corresponding to the elongated slot is arranged on a contact slope of the transmission slope block matched with the slope of the pressing mechanism housing, and a pin hole is arranged at one end of the elongated groove, and the pin is arranged in the pin hole; The first spring is arranged between the pin hole and the other end of the long groove to provide a reset force for the transmission wedge to slide.

5. The compacted structure of claim 4, wherein: The steering compression member further comprises a compression rod and a second spring; The transmission wedge and the compression plate are connected through the compression rod, and the compression rod is threadedly connected through the transmission wedge and the compression plate; The second spring is sleeved on the compression rod between the transmission wedge and the compression plate; The transmission wedge drives the compression plate, the compression rod and the second spring to slide along the inclined surface of the compression mechanism shell together; When the tightening bolt continues to rotate along the first rotation axis, the compression plate compresses the second spring and compresses the plate structure in the first direction until the part is compressed against the fixed plate.

6. The compacted structure of claim 1, wherein: A first reserved gap is arranged between the positioning sleeve and the positioning member in the second direction, and a second reserved gap is arranged in a radial direction perpendicular to the second direction, so that the plate structure has a degree of freedom of rotation around the second rotation axis and a degree of freedom of rotation around a third rotation axis extending in a third direction perpendicular to the first direction and the second direction.

7. The compacted structure of claim 1, wherein: The plate structure is provided with a heat sink for heat dissipation.

8. The compacted structure of claim 1, wherein: The plate structure and the part are fixed by bolt connection or adhesive fixation.

9. The compacted structure of claim 2, wherein: The base is a separate structure member different from the shell, located between the plate structure and the side wall of the shell, and a through hole is formed in the base, so that the compression plate of the steering compression member extends out of the through hole to abut against the side wall of the shell, and the base comprises at least one surface for fixing the positioning device.

10. The compacted structure of claim 2, wherein: The base is formed by the side wall of the shell, and the plate structure is mounted on the side wall of the shell through the positioning device.

11. The compacted structure of claim 1, wherein: The number of steering compression members is two, and the two steering compression members are respectively arranged at upper and lower ends of the plate structure; or The number of steering compression members is one, and the steering compression member is arranged at a middle position of the plate structure.

12. The compacted structure of claim 1, wherein: The part is a transformer or an IGBT.

13. A power module, characterized by: The transformer comprises a shell, a high-voltage circuit, a low-voltage circuit and a transformer, The shell comprises four side walls and a fixed plate, the four side walls are sequentially connected to form a cavity, and the fixed plate is arranged in the cavity to divide the cavity into a first space and a second space; The high-voltage circuit is electrically connected to the primary side of the transformer, the low-voltage circuit is electrically connected to the secondary side of the transformer, the high-voltage circuit and the primary side of the transformer are located in the first space, and the low-voltage circuit and the secondary side of the transformer are located in the second space; The primary side of the transformer and the secondary side of the transformer are respectively tightly attached to the fixed plate by using the compression structure of any one of claims 1-12.

14. A method of compressing a part within a cavity, the method comprising: The method comprises the following steps: A compression structure is provided, and the compression structure is the compression structure of any one of claims 2-5 and 9-10. The method comprises the following steps: The compression structure is placed in the cavity of the shell, at this time, there are gaps between the part and the fixing plate, and between the compression plate of the steering compression piece and the side wall of the shell; A screwdriver is inserted into the port of the shell, and the bolt is rotated and tightened, so that the tightening bolt moves along its axis direction to push the transmission inclined block to slide along the inclined surface, and then the compression plate on the transmission inclined block slides together with the transmission inclined block until it is attached to the side wall of the shell; Continue to rotate the screwdriver, so that the compression plate extrudes the side wall of the shell, thereby generating a reaction force to push the part to gradually approach the fixing plate until they are attached.

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