Blanking cover and electric drive assembly

Abstract

The utility model discloses a blanking cap and an electric drive assembly. The electric drive assembly comprises a shell, the shell is provided with a first shaft hole and a limiting groove which are arranged at an interval, and the blanking cap comprises an abutting piece, a plug and a buckle structure; the abutting piece is provided with an abutting side, and the abutting side is used for abutting against the side, provided with the first shaft hole and the limiting groove, of the shell. The plug is connected to the abutting side and inserted into the first shaft hole, and the plug is sleeved with an oil seal and is in interference fit with the oil seal. The buckle structure is connected to the abutting side, and the buckle structure is inversely buckled in the limiting groove and makes contact with the inner wall of the limiting groove. According to the technical scheme, the risk that the blanking cap is prone to falling off can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to a plugging cover and an electric drive assembly. Background Art

[0002] The differential in the electric drive assembly usually uses a plug cover to prevent foreign matter from entering the inside of the differential. The plug cover and the oil seal have an interference fit for simple sealing. During transportation, the entire machine vibrates and there is a risk of the plug cover falling off. Utility Model Content

[0003] The main purpose of the utility model is to provide a plugging cover, aiming to reduce the risk of the plugging cover easily falling off.

[0004] To achieve the above-mentioned purpose, the utility model proposes a plugging cover, which is applied to an electric drive assembly. The electric drive assembly includes a housing, and the housing is provided with a first shaft hole and a limiting groove arranged at intervals. The plugging cover includes:

[0005] An abutment member, wherein the abutment member has an abutment side, and the abutment side is used to abut against a side of the housing provided with the first shaft hole and the limiting groove;

[0006] A plug, the plug is connected to the abutting side and inserted into the first shaft hole, the plug sleeve is provided with an oil seal and has an interference fit with the oil seal;

[0007] A buckle structure, wherein the buckle structure is connected to the abutting side, the buckle structure is buckled in the limiting groove and contacts the inner wall of the limiting groove.

[0008] In an embodiment of the present invention, the buckle structure and the limiting groove are interference fit.

[0009] In an embodiment of the present invention, the buckle structure is a stepped buckle structure, so that the interference between the buckle structure and the limiting groove gradually increases from a direction close to the abutment member to a direction away from the abutment member.

[0010] In one embodiment of the utility model, the snap structure includes a connecting rod and a plurality of snap rings, one end of the connecting rod is connected to the abutting side, the snap ring is arranged on the outer periphery of the connecting rod, and the plurality of snap rings are arranged at intervals along the length direction of the connecting rod, and the outer diameters of the plurality of snap rings gradually increase in the direction from approaching the abutting member to away from the abutting member.

[0011] In an embodiment of the present invention, at least one of the plurality of snap rings is interference fit with the limiting groove, and one of the plurality of snap rings abuts against a step surface of the limiting groove.

[0012] In an embodiment of the present invention, a deformation space is formed in the connecting rod.

[0013] In an embodiment of the present invention, the axial direction of the buckle structure is parallel to the axial direction of the first axial hole.

[0014] In one embodiment of the utility model, the electric drive assembly further includes a differential, the differential is arranged in the housing, the differential is provided with a differential housing, the differential housing is provided with a second shaft hole coaxially arranged with the first shaft hole, and the plug includes:

[0015] a first mating section, the first mating section being connected to the abutting side and having an interference fit with the oil seal;

[0016] A second fitting section, wherein the second fitting section is connected to an end of the first fitting section away from the abutment member, and the second fitting section is used for clearance fitting with an inner wall of the second axial hole.

[0017] In an embodiment of the present invention, the outer diameter of the first matching section is greater than the outer diameter of the second matching section.

[0018] In one embodiment of the utility model, the plug also includes a connecting section, and the second mating section is connected to an end of the first mating section away from the abutment through the connecting section, and the outer diameter of the connecting section gradually decreases in the direction from approaching the abutment to away from the abutment.

[0019] In one embodiment of the utility model, the plug cover further includes a pull ring, at least a portion of which is disposed in the plug, and one end of the pull ring is passed through the abutment and extends to a side of the abutment facing away from the plug.

[0020] The utility model also provides an electric drive assembly, comprising:

[0021] A housing, wherein the housing is provided with a first shaft hole and a limiting groove arranged at intervals;

[0022] A differential, the differential is arranged in the housing and is provided with a differential housing, the differential housing is provided with a second shaft hole coaxially arranged with the first shaft hole;

[0023] As described above, the blocking cover, the abutment member of the blocking cover abuts against the side of the housing provided with the first shaft hole and the limiting groove, the plug of the blocking cover is inserted into the first shaft hole and the second shaft hole, and the buckle structure of the blocking cover is buckled in the limiting groove and contacts with the inner wall of the limiting groove;

[0024] An oil seal is sleeved on the plug and is interference fit with the plug, and the oil seal abuts against the inner wall of the first shaft hole.

[0025] In one embodiment of the utility model, the buckle structure includes a connecting rod and a plurality of snap rings, one end of the connecting rod is connected to the abutting side, the snap ring is arranged on the outer periphery of the connecting rod, and the plurality of snap rings are arranged at intervals along the length direction of the connecting rod, and the outer diameters of the plurality of snap rings gradually increase in the direction from close to the abutting piece to away from the abutting piece;

[0026] The limiting groove includes a first groove body and a second groove body, the first groove body and the second groove body are arranged from close to the abutment member to away from the abutment member, and the cross-sectional area of ​​the first groove body is smaller than the cross-sectional area of ​​the second groove body, so that a step surface is formed between the first groove body and the second groove body;

[0027] At least one of the plurality of snap rings is interference fit with the first slot body, and one of the plurality of snap rings abuts against the step surface.

[0028] In an embodiment of the present invention, the first matching section of the plug is interference-fitted with the oil seal, and the second matching section of the plug is spaced apart from the inner wall of the second axial hole.

[0029] In the plugging cover proposed by the utility model, the plugging cover includes a plug and a snap-fit ​​structure arranged on the abutment piece. When applied to the electric drive assembly, the abutting side of the abutment piece abuts against a side of the shell provided with a first axial hole and a limiting groove. At the same time, the plug is inserted into the first axial hole, and the snap-fit ​​structure can be buckled in the limiting groove and contact with the inner wall of the limiting groove. In this way, with the cooperation of the snap-fit ​​structure and the limiting groove, the installation reliability between the plugging cover and the shell can be increased, and the risk of the plugging cover falling off easily can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 This is a cross-sectional view of an embodiment of a plugging cover of the utility model;

[0032] Figure 2 It is a partial structural cross-sectional view of an embodiment of the electric drive assembly of the utility model.

[0033] Description of Figure Numbers:

[0034]

[0035]

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] The utility model provides a plugging cover 100, aiming to reduce the risk of the plugging cover 100 being easily dropped off.

[0041] The specific structure of the plugging cover 100 of the utility model will be described below:

[0042] Combined with reference Figure 1 , Figure 2In one embodiment of the plugging cover 100 of the utility model, the plugging cover 100 is applied to an electric drive assembly 1000, and the electric drive assembly 1000 includes a shell 200, and the shell 200 is provided with a first axial hole 210 and a limiting groove 220 arranged at intervals; the plugging cover 100 includes an abutment member 10, a plug 20 and a snap-fit ​​structure 30; the abutment member 10 has an abutment side 11, and the abutment side 11 is used to abut a side of the shell 200 provided with the first axial hole 210 and the limiting groove 220; the plug 20 is connected to the abutment side 11 and inserted into the first axial hole 210, and the plug 20 is sleeved with an oil seal 400 and has an interference fit with the oil seal 400; the snap-fit ​​structure 30 is connected to the abutment side 11, and the snap-fit ​​structure 30 is inverted on the limiting groove 220 and contacts with the inner wall of the limiting groove 220.

[0043] It can be understood that in the plugging cover 100 proposed in the utility model, the plugging cover 100 includes a plug 20 and a snap-fit ​​structure 30 arranged on the abutment 10. When applied to the electric drive assembly 1000, the abutting side 11 of the abutment 10 abuts against a side of the shell 200 provided with a first axial hole 210 and a limiting groove 220. At the same time, the plug 20 is inserted into the first axial hole 210, and the snap-fit ​​structure 30 can be buckled in the limiting groove 220 and contact with the inner wall of the limiting groove 220; in this way, with the cooperation of the snap-fit ​​structure 30 and the limiting groove 220, the installation reliability between the plugging cover 100 and the shell 200 can be increased, and the risk of the plugging cover 100 falling off easily can be reduced; at the same time, the plugging cover 100 can be prevented from loosening and rotating, and the sealing reliability between the plugging cover 100 and the oil seal 400 can be ensured, thereby avoiding the problem of oil leakage during the transportation of oil-carrying goods.

[0044] In actual application, the plug 20 can be an integrally formed structure with the abutment 10, and the plug 20 can also be connected to the abutment side 11 of the abutment 10 by bonding, threading, etc. Of course, in some embodiments, in order to ensure the reliability of the sealed connection between the plug 20 and the abutment 10, the plug 20 and the abutment 10 can be an integrally formed structure, which can also simplify the preparation process.

[0045] In actual application, similarly, the buckle structure 30 can be an integrally formed structure with the abutment member 10, and the buckle structure 30 can also be connected to the abutment side 11 of the abutment member 10 by bonding, threaded connection, etc. Of course, in some embodiments, in order to ensure the reliability of the sealing connection between the buckle structure 30 and the abutment member 10, the buckle structure 30 and the abutment member 10 can be an integrally formed structure.

[0046] In some embodiments, the oil seal 400 may be sleeved on one end of the plug 20 close to the abutment 10. In addition, a dust lip 410 is usually provided on one side of the oil seal 400 close to the abutment 10. In order to avoid interference between the dust lip 410 of the oil seal 400 and the abutment 10, an avoidance groove 12 may be provided on the abutment side 11 of the abutment 10, so that the dust lip 410 of the oil seal 400 at least partially extends into the avoidance groove 12.

[0047] Further, see Figure 1 , Figure 2 In one embodiment of the plugging cover 100 of the present invention, the buckle structure 30 is interference-fitted with the limiting groove 220. Such a configuration can improve the limiting strength between the buckle structure 30 and the limiting groove 220, thereby increasing the installation reliability between the plugging cover 100 and the housing 200.

[0048] In actual application, in the direction from close to the abutting member 10 to away from the abutting member 10 , the interference between the buckle structure 30 and the limiting groove 220 can remain consistent or gradually increase.

[0049] Further, see Figure 1 In one embodiment of the plugging cover 100 of the present invention, the buckle structure 30 is a stepped buckle structure 30, so that the interference between the buckle structure 30 and the limiting groove 220 gradually increases from the direction close to the abutment 10 to the direction away from the abutment 10.

[0050] In this way, by setting the snap structure 30 as a stepped snap structure 30, the interference between the snap structure 30 and the limiting groove 220 can be gradually increased from the direction close to the abutment 10 to the direction away from the abutment 10, which can improve the limiting strength between the snap structure 30 and the limiting groove 220, so as to further increase the installation reliability between the blocking cover 100 and the shell 200, and can play a better role in preventing loosening, falling off and rotating the blocking cover 100.

[0051] Further, see Figure 1 In one embodiment of the plugging cover 100 of the utility model, the snap-fit ​​structure 30 includes a connecting rod 31 and a plurality of snap-fit ​​rings 32, one end of the connecting rod 31 is connected to the abutting side 11, the snap-fit ​​ring 32 is arranged on the outer periphery of the connecting rod 31, and the plurality of snap-fit ​​rings 32 are arranged at intervals along the length direction of the connecting rod 31, and the outer diameters of the plurality of snap-fit ​​rings 32 gradually increase in the direction from approaching the abutting member 10 to away from the abutting member 10.

[0052] With such arrangement, in the process of buckling the snap structure 30 inverted in the limiting groove 220, multiple snap rings 32 can be inserted into the limiting groove 220 in sequence, and the interference between the multiple snap rings 32 and the limiting groove 220 can be gradually increased, so as to effectively improve the limiting strength between the snap structure 30 and the limiting groove 220; in addition, by arranging multiple snap rings 32 at intervals along the length direction of the connecting rod 31, the force when buckling the snap structure 30 inverted in the limiting groove 220 can be reduced, which makes it easier to achieve the inverted installation of the snap structure 30.

[0053] In this embodiment, one end of the connecting rod 31 is integrally formed with the abutting side 11 of the abutting member 10 , and the other end of the connecting rod 31 is extended in a direction away from the abutting member 10 .

[0054] In actual application, multiple snap rings 32 can be made to have an interference fit with the limiting groove 220; or some snap rings 32 among the multiple snap rings 32 close to the abutment 10 can be made to have an interference fit with the limiting groove 220, and some snap rings 32 among the multiple snap rings 32 far from the abutment 10 can be made to have a snap fit or a clearance fit with the limiting groove 220.

[0055] Further, see Figure 1 , Figure 2 In one embodiment of the plugging cover 100 of the present invention, at least one of the plurality of snap rings 32 is interference fit with the limiting groove 220 , and one of the plurality of snap rings 32 abuts against the step surface of the limiting groove 220 .

[0056] With such a configuration, when the snap structure 30 is buckled into the limiting groove 220, by making at least one of the multiple snap rings 32 have an interference fit with the limiting groove 220, and making one of the multiple snap rings 32 abut against the step surface of the limiting groove 220, so that the snap ring 32 is snap-fitted with the limiting groove 220, the limiting strength between the snap structure 30 and the limiting groove 220 can be further improved, so as to further increase the installation reliability between the blocking cover 100 and the shell 200, and can provide better anti-loosening, anti-falling and anti-rotation effects for the blocking cover 100.

[0057] In some embodiments, four snap rings 32 can be provided. When the snap structure 30 is buckled into the limiting groove 220, the two snap rings 32 close to the abutment 10 can be interference fit with the limiting groove 220, and the third snap ring close to the abutment 10 can be abutted against the step surface of the limiting groove 220; or, the three snap rings 32 close to the abutment 10 can be interference fit with the limiting groove 220, and the fourth snap ring 32 close to the abutment 10 can be abutted against the step surface of the limiting groove 220.

[0058] Of course, in other embodiments, the number of the snap-in rings 32 may also be three, five, etc., and the positional relationship between the plurality of snap-in rings 32 and the limiting groove 220 is not specifically limited herein, as long as at least one snap-in ring 32 can be interference fit with the limiting groove 220 and one of the snap-in rings 32 can be abutted against the step surface of the limiting groove 220.

[0059] Further, see Figure 1 In one embodiment of the plugging cover 100 of the present invention, a deformation space 311 is formed in the connecting rod 31 .

[0060] With such arrangement, when the buckle structure 30 is buckled in the limiting groove 220 , the buckle structure 30 can be deformed more easily due to the deformation space 311 formed in the connecting rod 31 , making it easier for the buckle structure 30 to be buckled in the limiting groove 220 .

[0061] In some embodiments, the deformation space 311 may be extended along the length direction of the connecting rod 31 .

[0062] Further, see Figure 1 , Figure 2 In one embodiment of the plugging cover 100 of the present invention, the axial direction of the buckle structure 30 is parallel to the axial direction of the first axial hole 210 .

[0063] With such arrangement, during the assembly process, when the plug 20 is inserted into the first axial hole 210 along the axial direction of the first axial hole 210, the snap structure 30 can also be buckled in the limiting groove 220 along its axial direction, so that the snap structure 30 can be buckled in the limiting groove 220 more smoothly.

[0064] Further, see Figure 1 , Figure 2 In one embodiment of the plug cover 100 of the utility model, the electric drive assembly 1000 also includes a differential 300, which is arranged in the housing 200, and the differential 300 is provided with a differential housing 310, and the differential housing 310 is provided with a second axial hole 310a coaxially arranged with the first axial hole 210; the plug 20 includes a first mating section 21 and a second mating section 22; the first mating section 21 is connected to the abutting side 11 and is interference fit with the oil seal 400; the second mating section 22 is connected to the end of the first mating section 21 away from the abutting member 10, and the second mating section 22 is used to fit with the inner wall clearance of the second axial hole 310a.

[0065] With such a configuration, when the plug cover 100 is applied to the electric drive assembly 1000, the first mating section 21 of the plug 20 is inserted into the first axial hole 210 of the housing 200, and is interference fit with the oil seal 400 at the first axial hole 210, so as to ensure the sealing reliability between the plug cover 100 and the oil seal 400, thereby avoiding the problem of oil leakage during the transportation of oil-containing goods; at the same time, the second mating section 22 of the plug 20 is inserted into the second axial hole 310a of the differential housing 310, and is gap fit with the inner wall of the second axial hole 310a, which can prevent the differential housing 310 from scratching the plug 20 and causing the plug 20 to fall off, thereby affecting the cleanliness of the inside of the differential 300.

[0066] In actual application, the inner diameter of the first matching segment 21 may be consistent with the inner diameter of the second matching segment 22 , or may be larger than the inner diameter of the second matching segment 22 .

[0067] Further, see Figure 1 In one embodiment of the plug cover 100 of the utility model, the outer diameter of the first mating section 21 is greater than the outer diameter of the second mating section 22; thus, the second mating section 22 can first pass through the first axial hole 210 of the housing 200 and then be inserted into the second axial hole 310a of the differential housing 310.

[0068] Further, see Figure 1 In one embodiment of the plug cover 100 of the utility model, the plug 20 also includes a connecting section 23, and the second matching section 22 is connected to the end of the first matching section 21 away from the abutment 10 through the connecting section 23. In the direction from approaching the abutment 10 to away from the abutment 10, the outer diameter of the connecting section 23 gradually decreases.

[0069] In this configuration, the second mating section 22 is connected to the first mating section 21 by using the connecting section 23 with a gradually changing outer diameter. In the process of buckling the snap structure 30 inverted in the limiting groove 220, the connecting section 23 with a gradually decreasing outer diameter can play a guiding role, so that the first mating section 21 can be smoothly introduced into the oil seal 400 to achieve an interference fit with the oil seal 400.

[0070] Further, see Figure 1 In one embodiment of the plugging cover 100 of the utility model, the plugging cover 100 also includes a pull ring 40, at least part of the pull ring 40 is arranged in the plug 20, and one end of the pull ring 40 is passed through the abutment 10 and extends to the side of the abutment 10 facing away from the plug 20.

[0071] With such arrangement, when installing or removing the plugging cover 100 , the user can manually pull the pull ring 40 of the plugging cover 100 , so as to better install the plugging cover 100 on the housing 200 , or better remove the plugging cover 100 from the housing 200 .

[0072] In some embodiments, a pull hole may be provided at one end of the pull ring 40 extending to the side of the abutment member 10 facing away from the plug 20 , and the user may hold the pull hole with his fingers.

[0073] Combined with reference Figure 2 The embodiment of the utility model further provides an electric drive assembly 1000, which includes a housing 200, a differential 300, an oil seal 400 and the plug cover 100 as described above. The specific structure of the plug cover 100 is detailed in the above embodiment. Since the drive system adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by all the technical solutions of all the above embodiments, which will not be described one by one here.

[0074] Among them, the housing 200 is provided with a first axial hole 210 and a limiting groove 220 which are arranged at intervals; the differential 300 is arranged in the housing 200, and is provided with a differential housing 310, and the differential housing 310 is provided with a second axial hole 310a which is coaxially arranged with the first axial hole 210; the abutment 10 of the plugging cover 100 abuts against a side of the housing 200 which is provided with the first axial hole 210 and the limiting groove 220, the plug 20 of the plugging cover 100 is inserted into the first axial hole 210 and the second axial hole 310a, and the snap structure 30 of the plugging cover 100 is inverted in the limiting groove 220 and contacts with the inner wall of the limiting groove 220; the oil seal 400 is sleeved on the plug 20, and has an interference fit with the plug 20, and the oil seal 400 abuts against the inner wall of the first axial hole 210.

[0075] It can be understood that in the electric drive assembly 1000 proposed in the utility model, the plug 100 includes a plug 20 and a snap-fit ​​structure 30 arranged on the abutment 10, and the abutment side 11 of the abutment 10 abuts against a side of the shell 200 provided with a first axial hole 210 and a limiting groove 220. At the same time, the plug 20 is inserted into the first axial hole 210, and the snap-fit ​​structure 30 can be buckled in the limiting groove 220 and contact with the inner wall of the limiting groove 220; in this way, with the cooperation of the snap-fit ​​structure 30 and the limiting groove 220, the installation reliability between the plug 100 and the shell 200 can be increased, and the risk of the plug 100 falling off easily can be reduced; at the same time, the plug 100 can be prevented from loosening and rotating, and the sealing reliability between the plug 100 and the oil seal 400 can be ensured, thereby avoiding the problem of oil leakage during the transportation of oil-carrying goods.

[0076] Further, see Figure 2 In one embodiment of the electric drive assembly 1000 of the utility model, the buckle structure 30 includes a connecting rod 31 and a plurality of snap rings 32. One end of the connecting rod 31 is connected to the abutting side 11. The snap ring 32 is arranged on the outer periphery of the connecting rod 31. The plurality of snap rings 32 are arranged at intervals along the length direction of the connecting rod 31. In the direction from close to the abutting member 10 to away from the abutting member 10, the outer diameters of the plurality of snap rings 32 gradually increase.

[0077] The limiting groove 220 includes a first groove body 220a and a second groove body 220b, and the first groove body 220a and the second groove body 220b are arranged from close to the abutment 10 to away from the abutment 10. The cross-sectional area of ​​the first groove body 220a is smaller than the cross-sectional area of ​​the second groove body 220b, so that a step surface is formed between the first groove body 220a and the second groove body 220b; at least one of the multiple snap rings 32 is interference fit with the first groove body 220a, and one of the multiple snap rings 32 abuts against the step surface.

[0078] With such a configuration, when the snap structure 30 is buckled into the limiting groove 220, by making at least one of the multiple snap rings 32 have an interference fit with the first groove body 220a, and making one of the multiple snap rings 32 abut against the step surface, so that the snap ring 32 is snap-fitted with the second groove body 220b, the limiting strength between the snap structure 30 and the limiting groove 220 can be further improved, so as to further increase the installation reliability between the blocking cover 100 and the shell 200, and can provide better anti-loosening, anti-falling and anti-rotation effects for the blocking cover 100.

[0079] In some embodiments, four snap rings 32 can be provided. When the snap structure 30 is buckled in the limiting groove 220, the two snap rings 32 close to the abutment 10 can be interference fit with the first groove body 220a, and the third snap ring and the fourth snap ring close to the abutment 10 can be located in the second groove body 220b, so that the third snap ring close to the abutment 10 can abut against the step surface; or, the three snap rings 32 close to the abutment 10 can be interference fit with the first groove body 220a, and the fourth snap ring 32 close to the abutment 10 can be located in the second groove body 220b, so that the fourth snap ring 32 close to the abutment 10 can abut against the step surface.

[0080] Further, see Figure 2 In one embodiment of the electric drive assembly 1000 of the present utility model, the first matching section 21 of the plug 20 is interference fit with the oil seal 400, and the second matching section 22 of the plug 20 is spaced apart from the inner wall of the second shaft hole 310a.

[0081] In this way, by inserting the first mating section 21 of the plug 20 into the first axial hole 210 of the housing 200 and interference fitting with the oil seal 400 at the first axial hole 210, the sealing reliability between the plug cover 100 and the oil seal 400 can be ensured, thereby avoiding the problem of oil leakage during the transportation of oil-containing goods; at the same time, by inserting the second mating section 22 of the plug 20 into the second axial hole 310a of the differential housing 310 and gap fitting with the inner wall of the second axial hole 310a, it can be prevented that the differential housing 310 scratches the plug 20 and causes the plug 20 to fall off, thereby affecting the cleanliness of the inside of the differential 300.

[0082] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A plugging cover, applied to an electric drive assembly, the electric drive assembly comprising a housing, the housing being provided with a first shaft hole and a limiting groove arranged at intervals, characterized in that: The plugging cover comprises: An abutment member, wherein the abutment member has an abutment side, and the abutment side is used to abut against a side of the housing provided with the first shaft hole and the limiting groove; A plug, the plug is connected to the abutting side and inserted into the first shaft hole, the plug sleeve is provided with an oil seal and has an interference fit with the oil seal; A buckle structure, wherein the buckle structure is connected to the abutting side, the buckle structure is buckled in the limiting groove and contacts the inner wall of the limiting groove.

2. The plugging cover according to claim 1, characterized in that: The buckle structure is interference fit with the limiting groove.

3. The plugging cover according to claim 2, characterized in that: The buckle structure is a stepped buckle structure, so that the interference between the buckle structure and the limiting groove gradually increases from a direction close to the abutment member to a direction away from the abutment member.

4. The plugging cover according to claim 3, characterized in that: The snap structure includes a connecting rod and a plurality of snap rings, one end of the connecting rod is connected to the abutting side, the snap ring is arranged on the outer periphery of the connecting rod, and the plurality of snap rings are arranged at intervals along the length direction of the connecting rod. In the direction from approaching the abutting part to away from the abutting part, the outer diameters of the plurality of snap rings gradually increase.

5. The plugging cover according to claim 4, characterized in that: At least one of the plurality of snap rings is interference fit with the limiting groove, and one of the plurality of snap rings is in contact with the step surface of the limiting groove.

6. The plugging cover according to claim 4, characterized in that: A deformation space is formed in the connecting rod.

7. The plugging cover according to any one of claims 1 to 6, characterized in that: The axial direction of the buckle structure is parallel to the axial direction of the first axial hole.

8. The plugging cover according to any one of claims 1 to 6, characterized in that: The electric drive assembly further includes a differential, the differential is arranged in the housing, the differential is provided with a differential housing, the differential housing is provided with a second shaft hole coaxially arranged with the first shaft hole, and the plug includes: a first mating section, the first mating section being connected to the abutting side and having an interference fit with the oil seal; A second fitting section, wherein the second fitting section is connected to an end of the first fitting section away from the abutment member, and the second fitting section is used for clearance fitting with an inner wall of the second axial hole.

9. The plugging cover according to claim 8, characterized in that: The outer diameter of the first fitting section is greater than the outer diameter of the second fitting section.

10. The plugging cover according to claim 9, characterized in that: The plug further includes a connecting section, through which the second fitting section is connected to an end of the first fitting section away from the abutment, and the outer diameter of the connecting section gradually decreases in a direction from approaching the abutment to away from the abutment.

11. The plugging cover according to any one of claims 1 to 6, characterized in that: The plug cover also includes a pull ring, at least part of which is arranged in the plug, and one end of the pull ring is passed through the abutment and extends to a side of the abutment facing away from the plug.

12. An electric drive assembly, characterized in that: include: A housing, wherein the housing is provided with a first shaft hole and a limiting groove arranged at intervals; A differential, the differential is arranged in the housing and is provided with a differential housing, the differential housing is provided with a second shaft hole coaxially arranged with the first shaft hole; The blocking cover according to any one of claims 1 to 11, wherein the abutment member of the blocking cover abuts against a side of the housing provided with the first shaft hole and the limiting groove, the plug of the blocking cover is inserted into the first shaft hole and the second shaft hole, and the buckle structure of the blocking cover is buckled in the limiting groove and contacts the inner wall of the limiting groove; An oil seal is sleeved on the plug and is interference fit with the plug, and the oil seal abuts against the inner wall of the first shaft hole.

13. The electric drive assembly according to claim 12, characterized in that: The buckle structure comprises a connecting rod and a plurality of snap rings, one end of the connecting rod is connected to the abutting side, the snap ring is arranged on the outer periphery of the connecting rod, and the plurality of snap rings are arranged at intervals along the length direction of the connecting rod, and the outer diameters of the plurality of snap rings gradually increase in the direction from close to the abutting piece to far away from the abutting piece; The limiting groove includes a first groove body and a second groove body, the first groove body and the second groove body are arranged from close to the abutment member to away from the abutment member, and the cross-sectional area of ​​the first groove body is smaller than the cross-sectional area of ​​the second groove body, so that a step surface is formed between the first groove body and the second groove body; At least one of the plurality of snap rings is interference fit with the first slot body, and one of the plurality of snap rings abuts against the step surface.

14. The electric drive assembly according to claim 12, characterized in that: The first matching section of the plug is interference-fitted with the oil seal, and the second matching section of the plug is spaced apart from the inner wall of the second shaft hole.

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