Shell sealing structure and electric driving device

Abstract

The invention provides a shell sealing structure and an electric driving device, and relates to the technical field of electric driving devices. The shell sealing structure comprises a shell body, a bus bar assembly and a sealing ring. The shell body is provided with a partition plate, a first cavity and a second cavity, a through hole is formed in the partition plate, the bus bar assembly penetrates through the through hole, and sealing of the bus bar assembly at the through hole is achieved through the sealing ring. The shell body is further provided with a first clamping part, the bus bar assembly is provided with a second clamping part, and the first clamping part and the second clamping part are clamped, so that the position fixation of the bus bar assembly and the shell body is ensured, and the situation that the bus bar assembly swings relative to the shell body in the use process is avoided. Therefore, the sealing effect is further ensured. The problem of sealing failure caused by large difference between the compression amounts of the two sides of the sealing ring is solved.

Description

Technical Field

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

[0002] An electric drive device is a device that uses electric energy to drive the motor to rotate and output power. Some electric drive devices adopt a T-shaped layout. Specifically, the T-shaped layout is characterized by the reduction gearbox being arranged between the motor and the motor controller. The motor controller converts the direct current provided by the power battery into alternating current, and supplies the alternating current to the stator winding of the motor. Therefore, there is a three-phase electrical connection between the motor controller and the stator winding of the motor. In order to achieve this electrical connection, the busbar needs to be set to a structure that passes from the motor controller into the reduction gearbox. Since the interior of the reduction gearbox is an oil chamber and the interior of the motor controller is a dry chamber, a sealing structure needs to be set at the through hole where the busbar passes from the motor controller into the reduction gearbox.

[0003] Due to the long length of the busbar and the influence of the assembly error, in order to offset the influence of the large error, a V-shaped sealing ring is currently mostly used to seal the through hole. However, the inventor has found that the sealing structure is prone to leakage. Summary of the invention

[0004] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

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

[0006] Another object of the present invention is to provide an electric drive device that can improve the technical problem of leakage that easily occurs in the prior art.

[0007] The embodiments of the present invention can be implemented in the following ways:

[0008] A housing sealing structure is used for an electric drive device, wherein the electric drive device comprises a motor, a transmission and a motor controller arranged in sequence; the housing sealing structure comprises:

[0009] A shell body, the shell body having a partition and a first chamber and a second chamber located on both sides of the partition, the first chamber is used to accommodate a transmission body to form the transmission, and the second chamber is used to accommodate a motor controller body to form the motor controller;

[0010] A bus bar assembly, wherein the partition is provided with a through hole, and the bus bar assembly is passed through the through hole so that the bus bar assembly enters the first cavity from the second cavity; and

[0011] A sealing ring; the sealing ring is sleeved on the busbar assembly, and the outer peripheral surface of the sealing ring is sealed and fitted with the peripheral wall of the through hole;

[0012] The shell body is provided with a first clamping portion, the bus bar assembly is provided with a second clamping portion, and the first clamping portion is clamped with the second clamping portion to limit the relative position of the bus bar assembly and the shell body.

[0013] Optionally, a clamping groove serving as the first clamping portion is formed on the partition, and a boss serving as the second clamping portion is provided on the busbar assembly.

[0014] Optionally, the clamping groove is an annular groove arranged around the through hole, and a center line of the clamping groove is colinear with a center line of the through hole.

[0015] Optionally, the snap-in groove is located on a side of the partition close to the second chamber.

[0016] Optionally, the through hole is opened at the bottom of the snap-in groove, and a first guide surface is provided at one end of the through hole close to the snap-in groove, and along the direction from the snap-in groove to the through hole, the opening area enclosed by the cross-section of the first guide surface gradually shrinks to guide the sealing ring to enter the through hole.

[0017] Optionally, a second guide surface is provided at the opening of the snap-fitting groove, and along the snap-fitting entry direction between the snap-fitting groove and the boss, the opening area enclosed by the cross section of the second guide surface gradually decreases to guide the boss to snap into the snap-fitting groove.

[0018] Optionally, the sealing ring is a rectangular sealing ring.

[0019] Optionally, a plurality of first protrusions are arranged on the outer circumferential surface of the rectangular sealing ring.

[0020] Optionally, the rectangular sealing ring further comprises an inner circumferential surface sealingly fitted with the busbar assembly, and a plurality of second protrusions are arranged on the inner circumferential surface.

[0021] Optionally, the shell body includes a first shell portion, a second shell portion and a third shell portion connected in sequence, and the partition is formed in the second shell portion; the first shell portion is connected to the second shell portion to jointly define the first chamber; the second shell portion is connected to the third shell portion to jointly define the second chamber.

[0022] Optionally, the busbar assembly includes a busbar body and a support member made of plastic material, the support member is connected to the busbar body, the sealing ring is sleeved on the support member, and the second clamping portion is arranged on the support member.

[0023] An electric drive device comprises a motor body, a transmission body, a motor controller body and the above-mentioned housing sealing structure, wherein the motor body is installed in the first chamber, the transmission body is installed in the first chamber, and the motor controller body is installed in the second chamber; one end of the bus bar assembly is connected to the motor controller body, and the other end of the bus bar assembly is connected to the motor body.

[0024] The beneficial effects of the housing sealing structure and the electric drive device provided by the embodiments of the present invention include:

[0025] An embodiment of the present invention provides a shell sealing structure, which includes a shell body, a busbar assembly and a sealing ring. The shell body has a partition and a first chamber and a second chamber located on both sides of the partition. The first chamber is used to accommodate a transmission body to form a transmission, and the second chamber is used to accommodate a motor controller body to form a motor controller. A through hole is provided on the partition, and the busbar assembly is passed through the through hole, so that the busbar assembly can enter the first chamber from the second chamber. The sealing ring is sleeved on the busbar assembly, and the outer peripheral surface of the sealing ring is sealed and fitted with the peripheral wall of the through hole, so that the sealing ring realizes the sealing of the busbar assembly at the through hole. A first clamping portion is also provided on the shell body, and a second clamping portion is provided on the bus bar assembly. The first clamping portion is clamped with the second clamping portion, so that the bus bar assembly and the shell body are accurately positioned to avoid the influence of assembly errors. At the same time, the clamping cooperation between the first clamping portion and the second clamping portion ensures that the position of the bus bar assembly and the shell body is fixed, avoiding the sealing failure problem caused by the large difference in compression on both sides of the sealing ring due to the swing of the bus bar assembly relative to the shell body during use, further ensuring the sealing effect.

[0026] The embodiment of the present invention further provides an electric drive device, which includes the above-mentioned housing sealing structure. Since the electric drive device includes the above-mentioned housing sealing structure, it also has the beneficial effects that the relative position of the busbar assembly and the housing body is fixed and the sealing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0028] Figure 1A structural block diagram of an electric drive device provided according to one aspect of the present invention is shown;

[0029] Figure 2 A partial structural schematic diagram of an electric drive device provided according to one aspect of the present invention is shown;

[0030] Figure 3 It shows an enlarged schematic diagram of a local structure of an electric drive device provided according to one aspect of the present invention;

[0031] Figure 4 A schematic diagram of the right side structure of a partition in a shell sealing structure provided according to one aspect of the present invention is shown.

[0032] Reference numerals:

[0033] 10-electric drive device; 100-shell sealing structure; 110-shell body; 111-first shell part; 112-second shell part; 113-third shell part; 114-first chamber; 115-second chamber; 116-partition; 121-first clamping part; 122-clamping groove; 123-through hole; 124-first guide surface; 125-second guide surface; 130-bus bar assembly; 131-second clamping part; 132-boss; 133-bus bar body; 134-support member; 140-sealing ring; 141-outer peripheral surface; 142-inner peripheral surface; 143-first raised portion; 144-second raised portion; 11-motor; 12-transmission; 13-motor controller. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0035] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Figure 1 This is a structural block diagram of the electric drive device 10 provided in this embodiment, Figure 2 A partial structural diagram of the electric drive device 10 provided in this embodiment, Figure 3 This is an enlarged schematic diagram of the partial structure of the electric drive device 10 provided in this embodiment. Figure 1-Figure 3 , this embodiment provides a housing sealing structure 100 , and accordingly, provides an electric drive device 10 .

[0039] The electric drive device 10 includes a housing sealing structure 100 , a motor body (not shown), a transmission body (not shown), and a motor controller body (not shown).

[0040] The housing sealing structure 100 includes a housing body 110, a busbar assembly 130 and a sealing ring 140. The housing body 110 has a partition 116 and a first chamber 114 and a second chamber 115 located on both sides of the partition. The first chamber 114 is used to accommodate the transmission body, and the second chamber 115 is used to accommodate the motor controller body. The partition 116 is provided with a through hole 123, and the busbar assembly 130 is inserted through the through hole 123, so that the busbar assembly 130 can enter the first chamber 114 from the second chamber 115. The sealing ring 140 is sleeved on the busbar assembly 130, and the outer peripheral surface 141 of the sealing ring 140 is sealed and fitted with the peripheral wall of the through hole 123, and then the sealing of the busbar assembly 130 at the through hole 123 is achieved by the sealing ring 140. A first clamping portion 121 is also provided on the shell body 110, and a second clamping portion 131 is provided on the bus bar assembly 130. The first clamping portion 121 and the second clamping portion 131 are clamped together, so as to limit the relative position of the bus bar assembly 130 and the shell body 110. On the one hand, the clamping of the first clamping portion 121 and the second clamping portion 131 ensures that the bus bar assembly 130 and the shell body 110 are accurately positioned to avoid the influence of assembly errors; on the other hand, the clamping cooperation of the first clamping portion 121 and the second clamping portion 131 ensures that the position of the bus bar assembly 130 and the shell body 110 is fixed, thereby avoiding the sealing failure caused by the large difference in compression on both sides of the sealing ring 140 due to the swing of the bus bar assembly 130 relative to the shell body 110 during use, thereby further ensuring the sealing effect.

[0041] At the same time, the motor body and the transmission body of the electric drive device 10 are both installed in the first chamber 114, and the motor controller body of the electric drive device 10 is installed in the second chamber 115. Specifically, the motor body is installed in the first chamber 114, and the motor body and the part of the shell body 110 constitute the motor 11. The transmission body is installed in the first chamber 114, and the transmission body and the part of the shell body 110 constitute the transmission 12. The motor controller body is installed in the second chamber 115, and thus constitutes the motor controller 13 with the part of the shell body 110. In other words, the electric drive device 10 can also be regarded as including the motor 11, the transmission 12 and the motor controller 13 arranged in sequence. One end of the bus bar assembly 130 is connected to the motor controller body, and the other end of the bus bar assembly 130 is connected to the motor body, so that the AC power converted by the motor controller body is transmitted to the motor body through the bus bar assembly 130.

[0042] Optionally, the shell body 110 may be configured to include a first shell portion 111, a first shell portion 112, and a third shell portion 113, wherein the first shell portion 111, the second shell portion 112, and the third shell portion 113 are sequentially connected to form the shell body 110. The partition 116 is formed on the second shell portion 112, and the first shell portion 111 and the second shell portion 112 are connected to define a first chamber 114, and the second shell portion 112 and the third shell portion 113 are connected to define a second chamber 115.

[0043] It should be noted that the composition of the shell body 110 is not limited here. It can be understood that in some other embodiments, the shell body 110 can also be set as a structure with upper and lower parts, for example, where parts of the first chamber 114 and the second chamber 115 are defined by the upper part of the shell body 110, and the other parts of the first chamber 114 and the second chamber 115 are defined by the lower half of the shell body 110.

[0044] Please continue to refer to Figure 1-Figure 3 In this embodiment, a clamping groove 122 as the first clamping portion 121 is provided on the partition 116. In other words, the first clamping portion 121 is the clamping groove 122 provided on the partition 116. A boss 132 as the second clamping portion 131 is provided on the bus bar assembly 130. In other words, the second clamping portion 131 is the boss 132 provided on the bus bar assembly 130. The boss 132 is clamped with the clamping groove 122, so as to realize the positioning of the bus bar assembly 130 and the partition 116.

[0045] It should be noted that the specific structure of the first clamping portion 121 and the second clamping portion 131 is not limited here. It can be understood that in some other embodiments, other structures can also be used as the first clamping portion 121 and the second clamping portion 131. For example, the first clamping portion 121 is set as a protrusion structure on the partition 116, and the second clamping portion 131 is set as a groove structure on the bus bar assembly 130, etc.

[0046] Specifically, the busbar assembly 130 includes a busbar body 133 and a support member 134. One end of the busbar body 133 is connected to the motor body, and the other end is connected to the motor controller body, so that the motor body and the motor controller body are connected through the busbar body 133. The support member 134 can be made of plastic material, which is connected to the busbar body 133, and the sealing ring 140 is sleeved outside the support member 134. At the same time, in this embodiment, the second clamping portion 131 is also provided on the support member 134.

[0047] Please continue to combine Figure 1-Figure 3 In this embodiment, the sealing ring 140 is a rectangular sealing ring. Specifically, the rectangular sealing ring has an outer peripheral surface 141 that is sealed with the through hole 123, and also has an inner peripheral surface 142 that is sealed with the busbar assembly 130. It can be understood that in other embodiments, other types of sealing rings, such as O-type sealing rings, can also be used according to needs.

[0048] Figure 4 This is a schematic diagram of the right side structure of the partition plate 116 in the housing sealing structure 100 provided in this embodiment. Figure 1-Figure 4 Furthermore, the clamping groove 122 is an annular groove arranged around the through hole 123, and the center line of the clamping groove 122 is colinear with the center line of the through hole 123. In this way, the through hole 123 and the clamping groove 122 are processed by one clamping, thereby avoiding the error accumulation caused by multiple clamping, and by ensuring the clamping accuracy of the boss 132 and the clamping groove 122, the assembly accuracy of the support member 134 and the through hole 123 can be effectively guaranteed. At the same time, since the clamping groove 122 is an annular groove arranged around the through hole 123, the boss 132 is an annular protrusion arranged around the bus bar assembly 130, so through the clamping cooperation between the clamping groove 122 and the boss 132, the swing of the bus bar assembly 130 in all directions around the shell body 110 can be limited.

[0049] Optionally, in this embodiment, the through hole 123 is a bar-shaped hole, and the two ends of the bar-shaped hole in the length direction are arc-shaped. Correspondingly, the clamping groove 122 is a bar-shaped hole that is consistent with the shape of the through hole 123 and has a larger outline size than the through hole 123.

[0050] Furthermore, the snap-in groove 122 is located on one side of the partition 116 close to the second chamber 115. In this way, when installing, the bus bar assembly 130 can be connected to the motor controller body first, and then when the motor controller body is installed on the second housing portion 112, the bus bar assembly 130 is connected to the motor controller body. Figure 1 The bus bar assembly 130 is inserted into the through hole 123 from right to left as shown, and as the bus bar assembly 130 is inserted into the through hole 123 , the boss 132 is inserted into the engaging groove 122 .

[0051] Furthermore, the through hole 123 is provided at the bottom of the clamping groove 122. In other words, the space enclosed by the through hole 123 is connected to the space enclosed by the clamping groove 122. A first guide surface 124 is provided at one end of the through hole 123 close to the clamping groove 122. Along the direction from the clamping groove 122 to the through hole 123, the opening area enclosed by the cross section of the first guide surface 124 gradually decreases to guide the sealing ring 140 to enter the through hole 123.

[0052] Specifically, the connection between the through hole 123 and the bottom of the clamping groove 122 is set as a chamfer, and the chamfer forms a first guide surface 124 for guiding the sealing ring 140 to enter the through hole 123. In addition, in order to ensure the sealing effect, the sealing ring 140 needs to have a certain radial compression after being installed in the through hole 123. In this embodiment, the sealing ring 140 is a rectangular sealing ring, that is, the cross section of the sealing ring 140 is rectangular, and its outer peripheral surface 141 is an annular cylindrical surface with the same thickness at all places. Therefore, by setting the first guide surface 124, not only can the busbar assembly 130 be guided to enter the through hole 123, reducing the difficulty of alignment, but also the radial compression of the sealing ring 140 increases as the sealing ring 140 is installed, which is convenient for the installation of the sealing ring 140.

[0053] In this embodiment, a second guide surface 125 is provided at the opening of the snap-fitting groove 122 , and along the snap-fitting direction between the snap-fitting groove 122 and the boss 132 , the opening area enclosed by the cross section of the second guide surface 125 gradually decreases to guide the boss 132 to snap into the snap-fitting groove 122 .

[0054] Specifically, the opening of the clamping groove 122, that is, the end of the clamping groove 122 away from the through hole 123 is provided with a chamfer, and the chamfer guides the boss 132 to enter the clamping groove 122 to form a second guide surface 125. Figure 1 and Figure 2 As shown in the figure, the opening size of the second guide surface 125 gradually decreases from right to left, so that the boss 132 can be smoothly installed into the clamping groove 122 when the matching tolerance between the boss 132 and the clamping groove 122 is small.

[0055] Optionally, in order to ensure that the boss 132 and the snap-fit ​​groove 122 have a sufficiently small assembly tolerance, during processing, the snap-fit ​​groove 122 can be processed first, and then the boss 132 is processed by comparing the size of the processed snap-fit ​​groove 122 to ensure that the matching accuracy between the boss 132 and the snap-fit ​​long groove meets the requirements.

[0056] Furthermore, the groove depth of the clamping groove 122 is greater than the thickness of the boss 132. Specifically, since the second guide surface 125 is provided at the opening of the clamping groove 122, the peripheral surface of the clamping groove 122 is composed of the cylindrical surface and the second guide surface 125. The groove depth of the clamping groove 122 satisfies that after the boss 132 is clamped into the clamping groove 122, the second guide surface 125 is located on one side of the boss 132, and the peripheral surface of the boss 132 only cooperates with the cylindrical surface of the clamping groove 122. In other words, the depth corresponding to the cylindrical surface of the clamping groove 122 is greater than or equal to the thickness of the boss 132.

[0057] Furthermore, a plurality of first protrusions 143 are provided on the outer peripheral surface 141. After the sealing ring 140 is installed into the through hole 123, the first protrusions 143 are squeezed and deformed by the through hole 123, which can increase the amount of squeeze deformation between the sealing ring 140 and the through hole 123, thereby ensuring the sealing performance between the sealing ring 140 and the through hole 123. At the same time, compared with increasing the thickness of the sealing ring 140 (that is, the distance between the outer peripheral surface 141 and the inner peripheral surface 142 of the sealing ring 140), providing a plurality of first protrusions 143 helps to reduce the difficulty of installation.

[0058] Optionally, the first raised portion 143 may be an annular raised portion extending along the circumference of the sealing ring 140, and a plurality of first raised portions 143 are distributed at intervals along the axial direction of the sealing ring 140; or the first raised portion 143 may be a point-shaped raised portion arranged on the outer peripheral surface 141 of the sealing ring 140, and a plurality of first raised portions 143 are randomly distributed on the outer peripheral surface 141 of the sealing ring 140.

[0059] Furthermore, a plurality of second protrusions 144 are provided on the inner circumferential surface 142. After the sealing ring 140 is sleeved on the bus bar assembly 130 and the sealing ring 140 is installed into the through hole 123, the second protrusions 144 are elastically deformed by the extrusion force, thereby increasing the extrusion deformation between the sealing ring 140 and the bus bar assembly 130, thereby ensuring the sealing performance between the sealing ring 140 and the bus bar assembly 130. At the same time, compared with increasing the thickness of the sealing ring 140, providing a plurality of second protrusions 144 helps to reduce the difficulty of installation.

[0060] Optionally, the second raised portion 144 may be an annular raised portion extending along the circumference of the sealing ring 140, and a plurality of second raised portions 144 are distributed at intervals along the axial direction of the sealing ring 140; or the second raised portion 144 may be a point-shaped raised portion arranged on the inner circumferential surface 142 of the sealing ring 140, and a plurality of second raised portions 144 are randomly distributed on the inner circumferential surface 142 of the sealing ring 140.

[0061] The shell sealing structure 100 and the electric drive device 10 provided by the embodiment of the present invention limit the relative position of the bus bar assembly 130 and the shell body 110 by setting the first clamping part 121 and the second clamping part 131. Even when the matching error between the bus bar assembly 130 and the through hole 123 is large, it can ensure the assembly accuracy and thus ensure the sealing effect; at the same time, it ensures that the relative position between the bus bar assembly 130 and the shell body 110 is fixed during use, avoiding the sealing failure problem caused by inconsistent extrusion deformation on both sides of the sealing ring 140 due to the relative swing of the bus bar assembly 130 relative to the shell body 110, thereby improving the sealing effect. At the same time, the sealing ring 140 arranged in the shell sealing structure 100 is a rectangular sealing ring, which is used to seal the through hole 123 and the bus bar assembly 130, effectively ensuring that the sealing effect can be guaranteed when pressure changes occur in the first chamber 114 and the second chamber 115, that is, when the pressure in the first chamber 114 is greater than the pressure in the second chamber 115, and the pressure in the second chamber 115 is greater than the pressure in the first chamber 114, etc., good sealing is achieved.

[0062] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A housing sealing structure for an electric drive device, wherein the electric drive device comprises a motor, a transmission and a motor controller arranged in sequence; characterized in that: The housing sealing structure comprises: A shell body, the shell body having a partition and a first chamber and a second chamber located on both sides of the partition, the first chamber is used to accommodate a transmission body to form the transmission, and the second chamber is used to accommodate a motor controller body to form the motor controller; A bus bar assembly, wherein the partition is provided with a through hole, and the bus bar assembly is passed through the through hole so that the bus bar assembly enters the first cavity from the second cavity; and A sealing ring; the sealing ring is sleeved on the busbar assembly, and the outer peripheral surface of the sealing ring is sealed and fitted with the peripheral wall of the through hole; Wherein, a first clamping portion is provided on the shell body, and a second clamping portion is provided on the bus bar assembly, and the first clamping portion is clamped with the second clamping portion to limit the relative position of the bus bar assembly and the shell body.

2. The housing sealing structure according to claim 1, characterized in that: The partition plate is provided with a clamping groove as the first clamping portion, and the busbar assembly is provided with a boss as the second clamping portion.

3. The housing sealing structure according to claim 2, characterized in that: The clamping groove is an annular groove arranged around the through hole, and the center line of the clamping groove is colinear with the center line of the through hole.

4. The housing sealing structure according to claim 2, characterized in that: The clamping groove is located on a side of the partition plate close to the second chamber.

5. The housing sealing structure according to claim 4, characterized in that: The through hole is opened at the bottom of the clamping groove, and a first guide surface is provided at one end of the through hole close to the clamping groove. Along the direction from the clamping groove to the through hole, the opening area surrounded by the cross section of the first guide surface gradually shrinks to guide the sealing ring to enter the through hole.

6. The housing sealing structure according to claim 2, characterized in that: A second guide surface is provided at the opening of the clamping groove, and along the clamping entry direction of the clamping groove and the boss, the opening area surrounded by the cross section of the second guide surface gradually decreases to guide the boss to clamp into the clamping groove.

7. The housing sealing structure according to claim 1, characterized in that: The sealing ring is a rectangular sealing ring.

8. The housing sealing structure according to claim 7, characterized in that: A plurality of first protrusions are arranged on the outer peripheral surface of the rectangular sealing ring.

9. The housing sealing structure according to claim 7, characterized in that: The rectangular sealing ring also has an inner circumferential surface that is sealed with the busbar assembly, and a plurality of second protrusions are arranged on the inner circumferential surface.

10. The housing sealing structure according to claim 1, characterized in that: The shell body comprises a first shell part, a second shell part and a third shell part which are connected in sequence, the partition is formed in the second shell part; the first shell part is connected to the second shell part to jointly define the first chamber; The second housing portion is connected to the third housing portion to jointly define the second chamber.

11. The housing sealing structure according to claim 1, characterized in that: The busbar assembly comprises a busbar body and a support member made of plastic material, the support member is connected to the busbar body, the sealing ring is sleeved on the support member, and the second clamping portion is arranged on the support member.

12. An electric drive device, characterized in that: The electric drive device includes a motor body, a transmission body, a motor controller body and a shell sealing structure as described in any one of claims 1 to 11, the motor body is installed in the first chamber, the transmission body is installed in the first chamber, and the motor controller body is installed in the second chamber; one end of the bus bar assembly is connected to the motor controller body, and the other end of the bus bar assembly is connected to the motor body.

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