HOUSING SEALING STRUCTURE AND ELECTRIC DRIVE

Abstract

The present invention provides a housing sealing structure and an electric drive and relates to the technical field of electric drives. The housing sealing structure comprises a main housing body, a busbar assembly, and a sealing ring. The main housing body has a partition plate, a first chamber, and a second chamber, each located on either side of the partition plate. A through-hole is provided in the partition plate, and the busbar assembly is guided through this through-hole. The sealing ring provides a seal between the busbar assembly and the through-hole. The main housing body is further provided with a first snap-in section. The busbar assembly is provided with a second snap-in section.The first and second locking sections interlock to ensure that the busbar assembly is fixed in a specific position relative to the main housing. This prevents the problem of seal failure caused during use by the large difference in compression on either side of the sealing ring due to the busbar assembly pivoting relative to the main housing, thus ensuring continued sealing performance.

Description

Technical area

[0001] The present invention relates to the technical field of electric drive, in particular a housing sealing structure and an electric drive. State of the art

[0002] An electric drive is a device that uses electrical energy to rotate an electric motor, thereby delivering power. Some electric drives use a T-shaped arrangement. The T-shaped arrangement is particularly characterized by the fact that a reduction gear is arranged between an electric motor and an electric motor controller. The electric motor controller converts the direct current supplied by a power battery into alternating current, and then the alternating current is supplied to a stator winding of the electric motor, thus establishing a three-phase electrical connection between the electric motor controller and the stator winding of the electric motor. To realize this electrical connection, a busbar must be provided as a structure inserted from the electric motor controller into the reduction gear.Since the inside of the reduction gear is an oil chamber and the inside of the electric motor controller is a dry chamber, a sealing structure must be arranged at a through hole through which the bus bar from the electric motor controller is inserted into the reduction gear.

[0003] Due to the long length of the busbar and the influence of assembly errors, a V-shaped sealing ring is commonly used to seal the through-hole to compensate for the influence of a large error. However, the inventor discovered through investigation that this sealing structure is prone to leakage problems. Disclosure of the invention

[0004] The following provides a brief overview of one or more aspects to provide basic knowledge of that aspect or aspects. This overview does not represent a complete summary of all aspects considered, nor does it intend to specify all essential or crucial elements of the aspects, nor to limit the scope of any or all aspects. Its sole purpose is to provide, in a simplified manner, some concepts according to one or more aspects to introduce the more detailed description below.

[0005] The object of the present invention is to provide a housing sealing structure with which the technical problem of leakage susceptibility in the prior art can be improved.

[0006] The object of the present invention is further to provide an electric drive with which the technical problem of susceptibility to leakage in the prior art can be improved.

[0007] The embodiments of the present invention can be realized in the following manner.

[0008] A housing sealing structure for an electric drive is provided, wherein the electric drive comprises an electric motor, a transmission, and an electric motor controller arranged sequentially. The housing sealing structure comprises: a housing main body having a partition plate, a first chamber and a second chamber respectively located on both sides of the partition plate, wherein the first chamber serves to accommodate a gear body to form the gear, and wherein the second chamber serves to accommodate an electric motor control body to form the electric motor control; a busbar arrangement, wherein a through-hole is provided in the partition plate, and wherein the busbar arrangement is guided through the through-hole so that the busbar arrangement passes from the second chamber into the first chamber; and a sealing ring, wherein the sealing ring is placed on the busbar arrangement and an outer peripheral surface of the sealing ring sealingly rests against a peripheral wall of the through-bore; wherein the housing main body is provided with a first engaging portion and the bus bar assembly is provided with a second engaging portion, and wherein the first engaging portion and the second engaging portion are engaged with each other to limit the relative position between the bus bar assembly and the housing main body.

[0009] Optionally, it is provided that the partition plate is provided with a locking groove as the first locking portion, and that the busbar assembly is provided with a shoulder as the second locking portion.

[0010] Optionally, the engagement groove is an annular groove provided around the through hole, and a center line of the engagement groove is collinear with a center line of the through hole.

[0011] Optionally, the locking groove is located on a side of the partition plate facing the second chamber.

[0012] Optionally, it is provided that the through-bore is provided in a groove base of the locking groove and an end of the through-bore facing the locking groove is provided with a first guide surface, wherein an opening surface enclosed by the cross section of the first guide surface tapers in the direction from the locking groove to the through-bore, so that the sealing ring is guided to reach the through-bore.

[0013] Optionally, it is provided that the locking groove is provided with a second guide surface at its opening, wherein an opening surface enclosed by the cross section of the second guide surface tapers in a direction in which the locking groove is locked to the shoulder, so that the shoulder is guided into the locking groove for locking.

[0014] Optionally, the sealing ring can be a rectangular sealing ring.

[0015] Optionally, an outer peripheral surface of the rectangular sealing ring is provided with a plurality of first projections.

[0016] Optionally, the rectangular sealing ring further comprises an inner circumferential surface which sealingly abuts the busbar arrangement and is provided with a plurality of second projections.

[0017] Optionally, the housing main body comprises a first housing part, a second housing part, and a third housing part, which are sequentially connected to each other, wherein the partition plate is formed on the second housing part; wherein the first housing part is connected to the second housing part to jointly define the first chamber; and wherein the second housing part is connected to the third housing part to jointly define the second chamber.

[0018] Optionally, it is provided that the busbar arrangement comprises a busbar body and a carrier element made of plastic, wherein the carrier element is connected to the busbar body, wherein the sealing ring is placed on the carrier element, and wherein the second latching section is provided on the carrier element.

[0019] An electric drive is provided comprising an electric motor body, a transmission body, an electric motor control body, and a housing sealing structure as described above, wherein the electric motor body and the transmission body are mounted in the first chamber and the electric motor control body is mounted in the second chamber; and wherein one end of the bus bar assembly is connected to the electric motor control body and the other end of the bus bar assembly is connected to the electric motor body.

[0020] The housing sealing structure and the electric drive according to the embodiments of the present invention offer the following advantageous effects.

[0021] The embodiments of the present invention provide a housing sealing structure comprising a housing main body, a bus bar assembly, and a sealing ring. The housing main body has a partition plate, a first chamber, and a second chamber, each located on either side of the partition plate. The first chamber accommodates a gear box to form a gear box, and the second chamber accommodates an electric motor control box to form an electric motor control box. A through-hole is provided in the partition plate, and the bus bar assembly is passed through the through-hole so that the bus bar assembly can pass from the second chamber into the first chamber. The sealing ring is fitted onto the bus bar assembly, and an outer peripheral surface of the sealing ring sealingly abuts a peripheral wall of the through-hole.The sealing ring thus seals the busbar assembly at the through-hole. The housing main body is further provided with a first locking portion. The busbar assembly is provided with a second locking portion. The first locking portion and the second locking portion are locked together, so that the busbar assembly and the housing main body are precisely positioned, thereby preventing the influence of assembly errors. Furthermore, the locking fit between the first locking portion and the second locking portion ensures that the position of the busbar assembly is fixed with respect to the housing main body.This avoids the problem of seal failure caused by the large difference in compression degree on the two sides of the seal ring during use due to the pivoting of the bus bar assembly relative to the housing main body, so that the sealing effect is further ensured.

[0022] The embodiments of the present invention further provide an electric drive including the above-described housing sealing structure. Since the electric drive includes the above-described housing sealing structure, it also has the advantageous effects of maintaining a fixed relative position of the bus bar assembly with respect to the housing main body and providing a good sealing effect. Short description of the characters

[0023] The above-described features and advantages of the present invention are better understood when the specific description of the embodiments of the present disclosure is read in conjunction with the following figures. In the figures, the components are not necessarily drawn to scale, and components that have similar relevant properties or features may be identified with the same or similar reference numerals. Fig. 1 shows a block diagram of a structure of an electric drive according to one aspect of the present invention; Fig. 2 shows a schematic partial representation of the structure of the electric drive according to one aspect of the present invention; Fig. 3 shows a schematic enlarged section of the structure of the electric drive according to one aspect of the present invention; and Fig. 4 is a schematic partial right-side view of a structure of a partition plate for a housing sealing structure according to one aspect of the present invention. List of reference symbols:

[0024] 10 - electric drive; 100 - housing sealing structure; 110 - housing main body; 111 - first housing part; 112 - second housing part; 113 - third housing part; 114 - first chamber; 115 - second chamber; 116 - partition plate; 121 - first engagement portion; 122 - engagement groove; 123 - through hole; 124 - first guide surface; 125 - second guide surface; 130 - bus bar assembly; 131 - second engagement portion; 132 - shoulder; 133 - bus bar body; 134 - support member; 140 - seal ring; 141 - outer peripheral surface; 142 - inner peripheral surface; 143 - first projection; 144 - second projection; 11 - electric motor; 12 - gear box; 13 - electric motor controller. Detailed embodiments

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the aspects described below in conjunction with the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of the present invention.

[0026] It should be noted that in the description of the present invention, the direction or positioning denoted by terms such as "top," "bottom," "inside," "outside," and "vertical," etc., where used, refers to the direction or positioning shown in the respective drawing or to a direction or positioning in which the product of the present invention is typically arranged for use. These terms do not implicitly or explicitly indicate the predetermined positioning or the configuration and operation of the device or element in question in a predetermined position, and therefore do not constitute a limitation of the present invention.

[0027] At the same time, it should be noted that the terms “first”, “second” and the like, where they appear, are used only for distinguishing purposes and cannot be understood as indicating or implying relative importance.

[0028] It should be noted that the terms "attach," "connect," and "connect" in the explanation of the present invention should be understood in a broad sense unless there are clear rules or regulations. For example, it can be a fixed connection, an integrated connection, or a detachable connection. It can be a mechanical connection or an electrical connection. It can be a direct connection, an indirect connection via a medium, a connection between the interiors of two elements, etc. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

[0029] Fig. 1 is a block diagram of a structure of an electric drive 10 according to an embodiment. Fig. 2 is a schematic partial representation of the structure of the electric drive 10 according to this embodiment. Fig. 3 is a schematic enlarged section of the structure of the electric drive 10 according to this embodiment. Referring to Fig. 1 to 3, the present embodiment provides a housing sealing structure 100 and correspondingly an electric drive 10.

[0030] The electric drive 10 includes the housing sealing structure 100, an electric motor body (not shown), a gear body (not shown), and an electric motor control body (not shown).

[0031] The housing sealing structure 100 includes a housing main body 110, a bus bar assembly 130, and a sealing ring 140. The housing main body 110 has a partition plate 116, a first chamber 114, and a second chamber 115, each located on either side of the partition plate. The first chamber 114 serves to accommodate the gear box body, and the second chamber 115 serves to accommodate the electric motor control body. A through-hole 123 is provided in the partition plate 116, and the bus bar assembly 130 is guided through the through-hole 123, allowing the bus bar assembly 130 to pass from the second chamber 115 into the first chamber 114. The sealing ring 140 is placed on the busbar assembly 130, and an outer peripheral surface 141 of the sealing ring 140 sealingly abuts a peripheral wall of the through-bore 123. Thus, the sealing ring 140 seals the busbar assembly 130 at the through-bore 123.The housing main body 110 is further provided with a first engaging portion 121, and the busbar assembly 130 is provided with a second engaging portion 131. The first engaging portion 121 and the second engaging portion 131 are engaged with each other to limit the relative position between the busbar assembly 130 and the housing main body 110. Thus, on the one hand, the engagement of the first engaging portion 121 and the second engaging portion 131 enables the busbar assembly 130 and the housing main body 110 to be precisely positioned to prevent the influence of assembly errors. On the other hand, the engaging fit between the first engaging portion 121 and the second engaging portion 131 ensures that the position of the busbar assembly 130 is fixed with respect to the housing main body 110.This avoids the problem of seal failure caused during use by the large difference in the degree of compression on the two sides of the seal ring 140 due to the pivoting of the bus bar assembly 130 relative to the housing main body 110, so that the sealing effect is further ensured.

[0032] In addition, the electric motor body and the transmission body of the electric drive 10 are each mounted in the first chamber 114, while the electric motor control body of the electric drive 10 is mounted in the second chamber 115. In particular, the electric motor body is mounted in the first chamber 114, so that the electric motor body forms an electric motor 11 with a part of the housing main body 110. The transmission body is mounted in the first chamber 114 and thus forms a transmission 12 with a part of the housing main body 110. The electric motor control body is mounted in the second chamber 115, so that it forms an electric motor control 13 with a part of the housing main body 110. In other words, the electric drive 10 can be considered a device that includes the electric motor 11, the transmission 12, and the electric motor control 13, which are provided one after the other.One end of the bus bar assembly 130 is connected to the electric motor control body and the other end of the bus bar assembly 130 is connected to the electric motor body, so that the alternating current obtained by the conversion of the electric motor control body is supplied to the electric motor body through the bus bar assembly 130.

[0033] Optionally, the housing main body 110 may be provided to include a first housing part 111, a second housing part 112, and a third housing part 113. The first housing part 111, the second housing part 112, and the third housing part 113 are sequentially connected to each other to form the housing main body 110. The partition plate 116 is formed in the second housing part 112, and the first housing part 111 is connected to the second housing part 112 to jointly define the first chamber 114, and the second housing part 112 is connected to the third housing part 113 to jointly define the second chamber 115.

[0034] It should be noted that the configuration of the housing main body 110 is not limited herein. It should be understood that in some other embodiments, the housing main body 110 may also be provided, for example, as a split structure with an upper part and a lower part. Here, one part of the first chamber 114 and the second chamber 115 is defined by the upper part of the housing main body 110, and the other part of the first chamber 114 and the second chamber 115 is defined by the lower part of the housing main body 110.

[0035] With further reference to Fig. 1 to 3, the partition plate 116 in this embodiment is provided with a locking groove 122 as the first locking portion 121. In other words, the first locking portion 121 is the locking groove 122 provided on the partition plate 116. The busbar assembly 130 is provided with a shoulder 132 as the second locking portion 131. In other words, the second locking portion 131 is the shoulder 132 provided on the busbar assembly 130. By locking the shoulder 132 with the locking groove 122, the positioning of the busbar assembly 130 and the partition plate 116 is achieved.

[0036] It should be noted that the specific configuration of the first engaging portion 121 and the second engaging portion 131 is not limited herein. It should be understood that in some other embodiments, a different structure is used for the first engaging portion 121 and the second engaging portion 131. For example, the first engaging portion 121 is provided as a protrusion structure on the partition plate 116, and the second engaging portion 131 is provided as a groove structure on the busbar assembly 130.

[0037] In particular, the busbar assembly 130 comprises a busbar body 133 and a support element 134. One end of the busbar body 133 is connected to the electric motor body, and the other end is connected to the electric motor control body, so that connection between the electric motor body and the electric motor control body is achieved through the busbar body 133. The support element 134 can be made of plastic. The support element is connected to the busbar body 133, and the sealing ring 140 is placed externally on the support element 134. Furthermore, the second engagement portion 131 is also provided on the support element 134 in this embodiment.

[0038] With further reference to Fig. 1 to 3, the sealing ring 140 in this embodiment is a rectangular sealing ring. Specifically, the rectangular sealing ring has the outer peripheral surface 141 that sealingly engages the through-hole 123 and also has an inner peripheral surface 142 that sealingly engages the busbar assembly 130. It should be understood that other types of sealing rings, such as O-rings, etc., may be used in other embodiments as needed.

[0039] Fig. Fig. 4 is a schematic partial right-side view of the structure of the partition plate 116 for the housing sealing structure 100 in this embodiment. Referring to Fig. 1 to 4, it is further provided that the engagement groove 122 is an annular groove provided around the through-hole 123, and that a center line of the engagement groove 122 is collinear with a center line of the through-hole 123. In this way, the machining of the through-hole 123 and the engagement groove 122 is performed by clamping once, thereby avoiding the accumulation of errors due to repeated clamping. By ensuring the accuracy of the engagement of the shoulder 132 and the engagement groove 122, the assembly accuracy of the support member 134 and the through-hole 123 can be effectively ensured.Furthermore, since the engagement groove 122 is an annular groove provided around the through hole 123, and the shoulder 132 is an annular protrusion provided around the bus bar assembly 130, the locking fit between the engagement groove 122 and the shoulder 132 can achieve the limitation of the pivoting of the bus bar assembly 130 relative to the housing main body 110 in any direction.

[0040] Optionally, the through-hole 123 in this embodiment is formed as a strip-shaped hole, both ends of which are curved in the longitudinal direction. Accordingly, the engagement groove 122 is such a strip-shaped groove, the shape of which matches the shape of the through-hole 123 and the profile size of which is larger than that of the through-hole 123.

[0041] Furthermore, it is provided that the engagement groove 122 is located on a side of the partition plate 116 facing the second chamber 115. Thus, during installation, the busbar assembly 130 can first be connected to the electric motor control body. Then, with the electric motor control body attached to the second housing part 112, the busbar assembly 130 is inserted from right to left (see FIG. Fig. 1) is inserted into the through-hole 123. During the insertion of the busbar assembly 130 into the through-hole 123, the shoulder 132 is inserted into the locking groove 122.

[0042] Furthermore, it is provided that the through-bore 123 is provided in a groove base of the locking groove 122. In other words, a space enclosed by the through-bore 123 is connected to a space enclosed by the locking groove 122. An end of the through-bore 123 facing the locking groove 122 is provided with a first guide surface 124. An opening area enclosed by the cross-section of the first guide surface 124 tapers in the direction from the locking groove 122 to the through-bore 123, so that the sealing ring 140 is guided into the through-bore 123.

[0043] In particular, the connection point between the through-hole 123 and the groove bottom of the engagement groove 122 is formed as a chamfer, which serves as the first guide surface 124 for guiding the sealing ring 140 into the through-hole 123. To ensure the sealing effect, the sealing ring 140 must also have a certain degree of radial compression after being fitted into the through-hole 123. In this embodiment, the sealing ring 140 is a rectangular sealing ring, i.e., this sealing ring 140 has a rectangular cross-section, an annular cylindrical surface as the outer peripheral surface 141, and thus a uniform thickness at every point.Thus, the provision of the first guide surface 124 not only enables the busbar assembly 130 to be guided into the through-hole 123 to reduce the difficulty of alignment, but also increases the degree of radial compression of the sealing ring 140 upon installation of the sealing ring 140, thereby facilitating the installation of the sealing ring 140.

[0044] In this embodiment, the locking groove 122 is provided with a second guide surface 125 at its opening. An opening surface enclosed by the cross section of the second guide surface 125 tapers in a direction in which the locking groove 122 is locked to the shoulder 132, so that the shoulder 132 is guided into the locking groove 122 for locking.

[0045] In particular, a chamfer is provided at the opening of the engagement groove 122, i.e., at the end of the engagement groove 122 facing away from the through-hole 123, which chamfer is designed as the second guide surface 125 for guiding the shoulder 132 into the engagement groove 122. The opening size of the second guide surface 125 decreases along the direction from right to left (cf. Fig. 1 and Fig. 2), so that with a small fit tolerance between the shoulder 132 and the engagement groove 122, it can be ensured that the shoulder 132 can be smoothly fitted into the engagement groove 122.

[0046] To ensure that the shoulder 132 has a sufficiently small assembly tolerance with the engagement groove 122, the engagement groove 122 can optionally be machined first during machining. The shoulder 132 can then be machined with reference to the dimension of the finished engagement groove 122 to ensure that the fit between the shoulder 132 and the elongated engagement groove meets the requirements.

[0047] Furthermore, it is provided that the groove depth of the locking groove 122 is greater than the thickness of the shoulder 132. In particular, because the second guide surface 125 is provided at the opening of the locking groove 122, the peripheral surface of the locking groove 122 consists of a cylindrical surface and the second guide surface 125. The groove depth of the locking groove 122 thus ensures that, after the shoulder 132 has engaged in the locking groove 122, the second guide surface 125 lies on one side of the shoulder 132 and the peripheral surface of the shoulder 132 only fits with the cylindrical surface of the locking groove 122. In other words, the depth of the locking groove 122, relative to the cylindrical surface, is greater than or equal to the thickness of the shoulder 132.

[0048] Furthermore, the outer peripheral surface 141 is provided with a plurality of first protrusions 143. After the seal ring 140 is installed in the through-hole 123, the first protrusions 143 deform due to the pressure of the through-hole 123. This can increase the degree of compression deformation between the seal ring 140 and the through-hole 123, which in turn ensures the sealing performance between the seal ring 140 and the through-hole 123. Furthermore, compared to increasing the thickness of the seal ring 140 (i.e., the distance between the outer peripheral surface 141 and the inner peripheral surface 142 of the seal ring 140), the difficulty of installation is reduced by providing a plurality of first protrusions 143.

[0049] Optionally, the first protrusion 143 may be an annular protrusion extending circumferentially along the sealing ring 140. In this case, the plurality of first protrusions 143 are distributed axially spaced apart along the sealing ring 140. Alternatively, the first protrusion 143 may be a point-shaped protrusion provided on the outer peripheral surface 141 of the sealing ring 140. In this case, the plurality of first protrusions 143 are randomly distributed on the outer peripheral surface 141 of the sealing ring 140.

[0050] Furthermore, the inner peripheral surface 142 is provided with a plurality of second protrusions 144. After the sealing ring 140 is placed on the busbar assembly 130 and the sealing ring 140 is installed in the through-hole 123, the second protrusions 144 are each subjected to elastic deformation under the action of the compressive force. This can increase the degree of compressive deformation between the sealing ring 140 and the busbar assembly 130, thus ensuring the sealing performance between the sealing ring 140 and the busbar assembly 130. Compared to increasing the thickness of the sealing ring 140, the difficulty of installation is reduced by providing a plurality of second protrusions 144.

[0051] Optionally, the second protrusion 144 may be an annular protrusion extending circumferentially along the sealing ring 140. In this case, the plurality of second protrusions 144 are distributed axially spaced apart along the sealing ring 140. Alternatively, the second protrusion 144 may be a point-shaped protrusion provided on the inner circumferential surface 142 of the sealing ring 140.

[0052] In this case, the plurality of second projections 144 are randomly distributed on the inner peripheral surface 142 of the sealing ring 140.

[0053] According to the embodiments of the present invention, the housing sealing structure 100 and the electric drive 10 are provided such that, by providing the engagement of the first engagement portion 121 with the second engagement portion 131, the relative position between the busbar assembly 130 and the housing main body 110 is limited, whereby the assembly accuracy and thus the sealing effect can be ensured even with a large fit error between the busbar assembly 130 and the through-hole 123. Furthermore, it is ensured that the relative position of the busbar assembly 130 with respect to the housing main body 110 is fixed during use.This avoids the problem of seal failure caused by the inconsistency of the compression deformation degrees on the two sides of the seal ring 140 due to the relative pivoting of the bus bar assembly 130 relative to the housing main body 110, thus improving the sealing effect. Furthermore, the seal ring 140 in the housing sealing structure 100 is a rectangular seal ring. Sealing between the through-hole 123 and the bus bar assembly 130 by means of the rectangular seal ring effectively ensures that the sealing effect can be maintained even when pressure changes occur in the first chamber 114 and the second chamber 115. That is, a good seal is maintained in a pressure situation where the pressure in the first chamber 114 is greater than the pressure in the second chamber 115, or the pressure in the second chamber 115 is greater than the pressure in the first chamber 114, etc.

[0054] Only detailed embodiments of the present invention have been described above, and these are not intended to limit the scope of the present invention. Modifications or substitutions readily conceivable by those skilled in the art within the technical field disclosed by the present invention are intended to be included within the scope of the present invention.

Claims

[1] Housing sealing structure for an electric drive comprising an electric motor, a transmission and an electric motor controller arranged one after the other; characterized by that the housing sealing structure includes: a housing main body having a partition plate, a first chamber and a second chamber respectively located on both sides of the partition plate, wherein the first chamber serves to accommodate a gear body to form the gear, and wherein the second chamber serves to accommodate an electric motor control body to form the electric motor control; a busbar arrangement, wherein a through-hole is provided in the partition plate, and wherein the busbar arrangement is guided through the through-hole so that the busbar arrangement passes from the second chamber into the first chamber; and a sealing ring, wherein the sealing ring is placed on the busbar arrangement and an outer peripheral surface of the sealing ring sealingly rests against a peripheral wall of the through-bore; wherein the housing main body is provided with a first engaging portion and the bus bar assembly is provided with a second engaging portion, and wherein the first engaging portion and the second engaging portion are engaged with each other to limit the relative position between the bus bar assembly and the housing main body. [2] Housing sealing structure according to claim 1, characterized by that the partition plate is provided with a locking groove as the first locking portion, and that the busbar assembly is provided with a shoulder as the second locking portion. [3] Housing sealing structure according to claim 2, characterized bythat the engagement groove is an annular groove provided around the through hole, and that a center line of the engagement groove is collinear with a center line of the through hole. [4] Housing sealing structure according to claim 2, characterized by that the locking groove is located on a side of the partition plate facing the second chamber. [5] Housing sealing structure according to claim 4, characterized by that the through-bore is provided in a groove base of the locking groove and an end of the through-bore facing the locking groove is provided with a first guide surface, wherein an opening surface enclosed by the cross-section of the first guide surface tapers in the direction from the locking groove to the through-bore, so that the sealing ring is guided into the through-bore to reach the. [6] Housing sealing structure according to claim 2, characterized bythat the locking groove is provided with a second guide surface at its opening, wherein an opening surface enclosed by the cross-section of the second guide surface tapers in a direction in which the locking groove is locked to the shoulder, so that the shoulder is guided into the locking groove for locking. [7] Housing sealing structure according to claim 1, characterized by that the sealing ring is a rectangular sealing ring. [8] Housing sealing structure according to claim 7, characterized by that an outer peripheral surface of the rectangular sealing ring is provided with a plurality of first projections. [9] Housing sealing structure according to claim 7, characterized by that the rectangular sealing ring further has an inner peripheral surface which sealingly rests against the busbar arrangement and is provided with a plurality of second projections. [10] Housing sealing structure according to claim 1, characterized bythat the housing main body comprises a first housing part, a second housing part, and a third housing part which are sequentially connected to each other, wherein the partition plate is formed on the second housing part; wherein the first housing part is connected to the second housing part to jointly define the first chamber; and wherein the second housing part is connected to the third housing part to jointly define the second chamber. [11] Housing sealing structure according to claim 1, characterized by that the busbar arrangement comprises a busbar body and a carrier element made of plastic, wherein the carrier element is connected to the busbar body, wherein the sealing ring is placed on the carrier element, and wherein the second latching section is provided on the carrier element. [12] Electric drive, characterized bythat it comprises an electric motor body, a gear body, an electric motor control body, and a housing sealing structure according to one of claims 1 to 11, wherein the electric motor body and the gear body are mounted in the first chamber and the electric motor control body is mounted in the second chamber; and wherein one end of the bus bar assembly is connected to the electric motor control body and the other end of the bus bar assembly is connected to the electric motor body.

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