Case protection structure and inverter

Abstract

The utility model discloses a case protection structure and an inverter, the case protection structure comprises a case and a protection assembly, the case comprises an upper cover and a case body, the upper cover and the case body are of an outward-turned open type structure, and the protection assembly comprises a fastener, a protective cover and a protective cover; the pressure bearing piece is arranged on the fastening piece in a sleeving manner, and the pressure bearing piece is provided with a containing part; the sealing piece is arranged on the fastening piece in a sleeving manner and is arranged in the accommodating part; wherein a standard pressing rivet piece is arranged between the upper cover and the box body in a transition mode, the fastening piece is used for penetrating through the upper cover, the box body and the standard pressing rivet piece to achieve connection, the pressure bearing piece is located between the fastening piece and the upper cover or the box body, and the sealing piece is used for being attached to the upper cover or the box body to form sealing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inverter cabinet structure, in particular to a cabinet protection structure and an inverter. BACKGROUND

[0002] At present, in the inverter industry, the inverter cabinet includes an outwardly turned open structure. Although this structure has the advantages of convenient assembly and simple sheet metal process, the connection between the front cover and the cabinet is usually located inside the sealing ring. This layout makes it difficult for conventional general rivets to meet higher IP protection levels, such as IP66 / IP65 requirements. Therefore, the industry usually needs to customize special internal thread matching parts and matching sealing rings.

[0003] Specifically, in large power industrial and commercial models, a front locking structure is usually used, in which case the front locking screw needs to be matched with a customized die casting part and a matching sealing ring. In small power household models, a reverse locking structure is usually used, in which case the reverse locking screw needs to be customized with a die casting part and a matching sealing ring, which needs to be sleeved outside the customized die casting part to achieve sealing. However, due to differences in overall appearance, cover matching size and sealing ring compression amount of different models, such customized parts and their matching sealing rings cannot be universal, which leads to multiple non-standard specifications of the same type of materials, not only increasing the cost, but also bringing significant risk of idle materials. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a cabinet protection structure and an inverter to reduce the cost of cabinet assembly and the risk of idle materials.

[0005] To achieve the above purpose, the technical solution adopted by the present application is to provide a cabinet protection structure, which includes a cabinet and a protection assembly. The cabinet includes a cover and a cabinet body, and the cover and the cabinet body are in an outwardly turned open structure. The protection assembly includes a fastener, a pressure bearing part, and a sealing part. The pressure bearing part is sleeved on the fastener and is provided with a receiving part. The sealing part is sleeved on the fastener and is located in the receiving part. A standard rivet is provided between the cover and the cabinet body. The fastener is used to pass through the cover, the cabinet body and the standard rivet to achieve connection. The pressure bearing part is located between the fastener and the cover or the cabinet body. The sealing part is used to fit the cover or the cabinet body to form a seal.

[0006] As a preferred embodiment, the fastener is a screw structure, which includes a screw head and a screw rod connected to the screw head.

[0007] As another preferred, the screw rod part comprises a smooth rod part and a threaded part, the smooth rod part is adjacent to the screw head part, the threaded part is formed at the end of the screw rod part, so that the smooth rod part is between the screw head part and the threaded part; the pressure bearing part and the sealing part are sleeved on the smooth rod part.

[0008] Further preferably, the pressure bearing part comprises a pad plate and an annular convex wall protruding upward from the periphery of the pad plate, the pad plate and the annular convex wall jointly enclose the accommodating part.

[0009] Further preferably, the sealing part is accommodated in the accommodating part, the circumferential surface of the sealing part is fitted with the inner wall of the annular convex wall, and the bottom surface of the sealing part is fitted with the surface of the pad plate.

[0010] Preferably, when the sealing part is placed in the accommodating part, at least part of the sealing part protrudes out of the accommodating part; wherein the top surface of the sealing part protrudes a first height H1 relative to the top surface of the annular convex wall.

[0011] Preferably, the smooth rod part is provided with a first axial thickness D1, and the annular convex wall is provided with a second axial thickness D2; the first axial thickness D1 is used to limit the locking travel of the fastener, and also limits the movement range of the pressure bearing part, and the sum of the second axial thickness D2 and the first height H1 is less than or equal to the first axial thickness D1.

[0012] Further, the pressure bearing part is specifically an annular gasket, and the outer diameter of the pressure bearing part is greater than the outer diameter of the screw head part.

[0013] Preferably, the protective assembly is arranged near one side of the outer wall of the upper cover, and the protective assembly sequentially passes through the upper cover, the standard pressure rivet and the box body arranged in mutual stacking to form a front locking structure; or, the protective assembly is arranged near one side of the outer wall of the box body, and the protective assembly sequentially passes through the box body, the standard pressure rivet and the upper cover arranged in mutual stacking to form a reverse locking structure.

[0014] Further, the present application also provides an inverter comprising the cabinet protection structure according to any one of the above, the cabinet protection structure comprising a cabinet and a protective assembly, and the cabinet is provided with a circuit function unit.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] The press-in part and the sealing part are arranged separately in the application, so that the sealing part does not need to be fixed on the press-in part without using a customized press-in part, and the positioning deviation of the sealing part after being arranged separately is solved, and the protection assembly in the application is provided with a receiving part in the pressure-bearing part to cooperate with the sealing part, so that the protection assembly in the application is applicable to any front locking or back locking structure of the case, the universality of the part is improved, the high IP protection is realized, and the material management and production cost are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic diagram of the protection assembly.

[0018] Figure 2 Fig. 2 is a structural schematic diagram of the protection assembly from a front perspective.

[0019] Figure 3 Fig. 3 is an exploded structural schematic diagram of the protection assembly.

[0020] Figure 4 Fig. 4 is another structural schematic diagram of the protection assembly.

[0021] Figure 5 Fig. 5 is a structural schematic diagram of the case in a front locking structure.

[0022] Figure 6 Fig. 6 is an exploded structural diagram of the case in the front locking structure.

[0023] Figure 7 Fig. 7 is a structural schematic diagram of the case in a back locking structure.

[0024] Figure 8 Fig. 8 is an exploded structural diagram of the case in the back locking structure.

[0025] In the figure, 100, case protection structure; 1, protection assembly; 2, case; 3, upper cover; 4, case body; 5, standard press-in part; 6, case body sealing ring; 10, fastener; 11, screw head; 12, screw rod; 121, light rod; 122, threaded part; 20, pressure-bearing part; 21, receiving part; 22, pad; 23, annular convex wall; 30, sealing part. DETAILED DESCRIPTION

[0026] Hereinafter, the application will be further described in combination with specific embodiments, and it should be noted that the embodiments described below or the technical features can be combined to form new embodiments without conflict.

[0027] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship 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, and cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0029] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] In a preferred embodiment, referring to Figures 1 to 8 The present application provides a case protection structure 100, which comprises a case 2 and a protection assembly 1. The case 2 comprises a cover 3 and a box body 4, and the cover 3 and the box body 4 are in an outwardly turned open structure. Referring to Figure 2 and Figure 3 The protection assembly 1 comprises a fastener 10, a pressure bearing piece 20, and a sealing piece 30. The pressure bearing piece 20 is sleeved on the fastener 10 and is provided with a receiving portion 21. The sealing piece 30 is sleeved on the fastener 10 and is located in the receiving portion 21. The standard pressure rivet 5 is arranged between the cover 3 and the box body 4. The fastener 10 is used to pass through the cover 3, the box body 4 and the standard pressure rivet 5 to achieve connection. The pressure bearing piece 20 is located between the fastener 10 and the cover 3 or the box body 4. The sealing piece 30 is used to fit the cover 3 or the box body 4 to form a seal.

[0031] Referring to Figures 5 to 8 The standard pressure rivet 5 is arranged at the outwardly turned open transition of the cover 3 and the box body 4, without using a customized pressure rivet. During assembly, the fastener 10 passes through the cover 3, the standard pressure rivet 5 and the box body 4 in sequence to achieve mechanical connection among them. The pressure bearing piece 20 is arranged between the head of the fastener 10 and the outer surface of the cover 3 or the box body 4. The sealing piece 30 is pressed in the receiving portion 21 during the locking process of the fastener 10, so that the surface of the sealing piece 30 and the contact surface of the cover 3 or the box body 4 form a reliable seal.

[0032] The key of the present embodiment is that a standardized sealing connection structure is constructed by the combination design of the pressure bearing piece 20, the sealing piece 30 and the industry general standard rivet 5; the structure effectively solves the problems caused by relying on customized internal thread parts in the prior art, for example, the customized internal thread parts need to be produced by opening the mold, and the size is fixed and cannot be adapted to the changes caused by the differences in the overall appearance, the box cover matching size and the sealing ring compression amount in different machine types, thereby causing the parts to be not universal, the material types to be numerous, the cost to be high and the idle materials to be easily produced; therefore, in the present application, the rivet and the sealing piece 30 are separately arranged, so that the customized rivet is not needed, the sealing piece 30 does not need to be fixed on the rivet, and for the positioning offset problem of the sealing piece 30 after being separately arranged, the protective assembly 1 in the present application is provided with the accommodating part 21 in the pressure bearing piece 20 to cooperate with the sealing piece 30, the change from customized design to standard configuration is realized, the protective assembly 1 in the present application is applicable to any front locking or reverse locking structure of the machine box 2, the universality of the parts is significantly improved, and the material management and production cost are reduced.

[0033] As a preferred, referring to Figure 3 and Figure 4 , the fastener 10 is specifically a screw structure, which includes a screw head part 11 and a screw rod part 12 connected with the screw head part 11.

[0034] The screw rod part 12 includes a smooth rod part 121 and a threaded part 122, the smooth rod part 121 is adjacent to the screw head part 11, and the threaded part 122 is formed at the end of the screw rod part 12, so that the smooth rod part 121 is located between the screw head part 11 and the threaded part 122; the pressure bearing piece 20 and the sealing piece 30 are sleeved on the smooth rod part 121.

[0035] The smooth rod part 121 provides a smooth and size-accurate axial positioning reference for the pressure bearing piece 20 and the sealing piece 30, so that they can be quickly and accurately centered during assembly, avoiding the deflection caused by being directly sleeved on the thread; at the same time, the setting of the smooth rod part 121 avoids the direct contact and scraping of the sharp edges of the thread with the sealing piece 30, especially the elastic body such as the O-ring, during assembly, effectively preventing the sealing piece 30 from being scratched or sheared during installation, thereby ensuring the sealing integrity and service life.

[0036] Further preferably, referring to Figure 3 , the pressure bearing piece 20 includes a pad plate 22 and an annular convex wall 23 protruding upward from the periphery of the pad plate 22, and the pad plate 22 and the annular convex wall 23 jointly enclose an accommodating part 21 with an open top.

[0037] Further preferably, the sealing member 30 is accommodated in the accommodating portion 21, and a circumferential surface of the sealing member 30 is in abutment with an inner wall of the annular convex wall 23, and a bottom surface of the sealing member 30 is in abutment with a surface of the backing plate 22.

[0038] The inner wall of the annular convex wall 23 wraps around the circumferential surface of the sealing member 30, thereby providing accurate radial positioning and effectively preventing the sealing member 30 from being laterally displaced or rolled during assembly or use; at the same time, the backing plate 22 provides reliable axial positioning for the sealing member 30, thereby effectively avoiding wear caused by direct contact between the sealing member 30 and the head portion 11 of the screw.

[0039] Further, the sealing member 30 is limited in a predetermined space formed by the backing plate 22 and the annular convex wall 23, and when the fastener 10 is locked, the sealing member 30 can only be compressed in the axial direction, and the deformation path and deformation amount of the sealing member 30 can be effectively controlled, thereby preventing the sealing member 30 from being excessively displaced in the axial direction along the screw shank portion 12, ensuring the accuracy of the installation position of the sealing member 30, and ultimately forming a stable and uniform sealing ring belt.

[0040] At the same time, the integrated accommodating portion 21 enables the pressure-bearing member 20 and the sealing member 30 to be combined into an integral module during the pre-assembly stage, thereby greatly facilitating subsequent picking and automated assembly operations, improving production efficiency, and reducing the risk of assembly errors caused by inaccurate placement of the sealing member 30 by hand.

[0041] Preferably, referring to Figure 2 and Figure 4 When the sealing member 30 is placed in the accommodating portion 21, at least part of the sealing member 30 protrudes out of the accommodating portion 21; wherein the top surface of the sealing member 30 protrudes a first height H1 relative to the top surface of the annular convex wall 23. Specifically, when the sealing member 30 is accommodated in the accommodating portion 21 and is in a free state, the top surface of the sealing member 30 protrudes the first height H1 relative to the top surface of the annular convex wall 23, thereby indicating that the sealing member 30 has a pre-protrusion amount before the fastener 10 is locked relative to the upper cover 3 or the box body 4.

[0042] Preferably, the light shank portion 121 has a first axial thickness D1, and the annular convex wall 23 has a second axial thickness D2; the first axial thickness D1 is used to limit the locking stroke of the fastener 10, and also limits the movement range of the pressure-bearing member 20, and the sum of the second axial thickness D2 and the first height H1 is less than or equal to the first axial thickness D1, thereby ensuring that the pressure-bearing member 20 and the sealing member 30 can be stationary in the light shank portion 121 or have a certain axial movement space, so as to ensure that the pressure-bearing member 20 and the sealing member 30 do not interfere with the threaded portion 122.

[0043] Meanwhile, the first axial thickness D1 is sized to mechanically limit the final locking travel of the fastener 10 and to limit the axial movement of the pressure-bearing member 20 on the polished rod portion 121; to achieve the best sealing and stress effect, preferably, the sum of the second axial thickness D2 and the first height H1 is equal to the first axial thickness D1.

[0044] Specifically, as the most preferred embodiment, the size parameters satisfy the relationship that the sum of the second axial thickness D2 and the first height H1 is equal to the first axial thickness D1; that is, when the protective assembly 1 is assembled to the cabinet 2 and the locking is completed, this specific size relationship ensures that the pressure-bearing member 20 is completely constrained in the axial direction, the lower end surface of the pressure-bearing member 20 is in close contact with the surface of the cabinet 4 or the surface of the upper cover 3, and the upper end surface is fixed by the head of the fastener 10, thereby maximizing the inhibition of the shaking phenomenon of the assembly under vibration conditions.

[0045] Further, referring to Figure 2 , the pressure-bearing member 20 is specifically an annular gasket, and the outer diameter d2 of the pressure-bearing member 20 is greater than the outer diameter d1 of the screw head 11.

[0046] Specifically, the pressure-bearing member 20 as an independent intermediate member can disperse the axial pre-tightening force borne by the fastener 10 to a larger area than the direct contact of the screw head 11 when the fastener 10 is locked. This effectively reduces the pressure on the surface of the plate material of the cabinet 2, avoiding surface crushing or plastic deformation caused by stress concentration, and is especially suitable for thinner or softer cabinet 4 materials.

[0047] Further, referring to Figures 5 to 8 , the present application also provides an inverter comprising the cabinet protection structure 100 according to any one of the above, the cabinet protection structure 100 comprising a cabinet 2 and a protective assembly 1, the cabinet 2 comprising an upper cover 3 and a cabinet body 4, a standard pressure rivet 5 being arranged between the upper cover 3 and the cabinet body 4, and a circuit functional unit being arranged in the cabinet 2.

[0048] Preferably, the protective assembly 1 is arranged close to the outer wall of the upper cover 3, and the protective assembly 1 sequentially penetrates the upper cover 3, the standard pressure rivet 5, and the cabinet body 4 arranged in a stacked manner to form a front locking structure; or, the protective assembly 1 is arranged close to the outer wall of the cabinet body 4, and the protective assembly 1 sequentially penetrates the cabinet body 4, the standard pressure rivet 5, and the upper cover 3 arranged in a stacked manner to form a reverse locking structure.

[0049] When the upper cover and the cabinet body 4 are connected as front locking screws, that is, as shown in Figure 5 and Figure 6 , the assembly process sequence of this structure is: cabinet body 4, cabinet sealing ring 6, upper cover 3, protective assembly 1; when the upper cover 3 and the cabinet body 4 are connected as reverse locking screws, as shown inFigure 7 With Figure 8 As shown in the figure, the structure assembly process sequence is: protective assembly 1, box 4, box sealing ring 6, upper cover 3.

[0050] Figures 5 to 8 Both are actual use structure, box 4 comes with standard pressure rivet 5 in advance, then the box 4 and the front cover are assembled, finally the protective assembly 1 is locked, so as to realize the high IP protection effect of the case 2.

[0051] Among them, different models of conventional general standard pressure rivet 5 can be selected to adapt to different sizes of case 2 models, which will not cause the diversification and differentiation of materials.

[0052] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A cabinet protection structure, characterized in that, a cabinet and a protection assembly are included, the cabinet includes a cover and a box body, the cover and the box body are in an outwardly turned open structure; the protection assembly includes: a fastener; a pressure bearing piece, the pressure bearing piece is sleeved on the fastener, and the pressure bearing piece is provided with a receiving part; a sealing piece, the sealing piece is sleeved on the fastener and is placed in the receiving part; wherein a standard pressure rivet is provided between the cover and the box body, the fastener is used to pass through the cover, the box body and the standard pressure rivet to achieve connection, the pressure bearing piece is located between the fastener and the cover or the box body, and the sealing piece is used to fit the cover or the box body to form a seal.

2. The cabinet protection structure of claim 1, characterized in that, the fastener is specifically a screw structure, the screw structure includes a screw head and a screw rod connected with the screw head.

3. The cabinet protection structure of claim 2, characterized in that, the screw rod includes a light rod portion and a threaded portion, the light rod portion is adjacent to the screw head, and the threaded portion is formed at the end of the screw rod, so that the light rod portion is located between the screw head and the threaded portion; the pressure bearing piece and the sealing piece are sleeved on the light rod portion.

4. The cabinet protection structure of claim 3, characterized in that, the pressure bearing piece includes a gasket and an annular convex wall protruding upward from the periphery of the gasket, and the gasket and the annular convex wall jointly enclose the receiving part.

5. The cabinet protection structure of claim 4, characterized in that, the sealing piece is accommodated in the receiving part, the circumferential surface of the sealing piece is fitted with the inner wall of the annular convex wall, and the bottom surface of the sealing piece is fitted with the surface of the gasket.

6. The cabinet protection structure of claim 5, characterized in that, when the sealing piece is placed in the receiving part, at least part of the sealing piece protrudes out of the receiving part; wherein the top surface of the sealing piece protrudes a first height H1 relative to the top surface of the annular convex wall.

7. The cabinet protection structure of claim 6, characterized in that, the light rod portion is provided with a first axial thickness D1, and the annular convex wall is provided with a second axial thickness D2; the first axial thickness D1 is used to limit the locking travel of the fastener, and the sum of the second axial thickness D2 and the first height H1 is less than or equal to the first axial thickness D1.

8. The cabinet protection structure of any one of claims 2-7, characterized in that, the pressure bearing piece is specifically an annular gasket, and the outer diameter of the pressure bearing piece is greater than the outer diameter of the screw head.

9. The cabinet protection structure of any one of claims 1-7, characterized in that, the protection assembly is arranged close to one side of the outer wall of the cover, and the protection assembly passes through the cover, the standard pressure rivet and the box body arranged in sequence to form a front locking structure; or, The protection assembly is arranged close to one side of the outer wall of the box body, and sequentially penetrates the box body, the standard rivet and the upper cover arranged in a stacked manner to form a reverse lock structure.

10. An inverter, characterized by comprising: The protection assembly comprises: The machine case protection structure according to any one of claims 1-9.

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