Electric drive axle production process, electric drive axle leakage test mechanism and production method thereof

Abstract

The invention provides an electric drive axle production process, an electric drive axle leakage test mechanism and a production method thereof, and belongs to the field of electric drive axle production. The electric drive axle leakage testing mechanism comprises a connecting main body, a first connecting part and a second connecting part, the connecting main body is of a hollow structure, the first end and the second end, which are oppositely arranged, of the connecting main body are open, and the connecting main body is further provided with an air pipe connector communicated with the hollow structure. The leakage testing pipe is used for connecting a leakage testing machine; the first connecting part is provided with a first via hole, sleeves the first end of the connecting main body, and is used for connecting a left axle leg of the electric drive axle; and the second connecting part is provided with a second via hole, sleeves the second end of the connecting main body and is used for connecting a right axle leg of the electric drive axle. The production efficiency of the electric drive axle can be improved.

Description

Technical Field

[0001] The present invention relates to the field of electric drive axle production, and particularly to an electric drive axle production process, a leak detection mechanism for an electric drive axle, and a production method thereof. Background Art

[0002] An electric drive axle is a device that converts electrical energy into mechanical energy to drive a vehicle or other means of transportation, and includes an electric motor, a speed reducer, and other related components. In the field of electric vehicles, the electric drive axle acts as the power heart, converting the electrical energy provided by the battery into the force to drive the wheels to rotate. Compared with traditional vehicles relying on internal combustion engines, the electric drive axle does not emit exhaust gas and is more environmentally friendly. At the same time, its efficient energy conversion method also helps to reduce energy consumption and costs during operation.

[0003] During the production process of an electric drive axle, it is necessary to perform airtightness detection to ensure the safety of the electric drive axle during use. In the prior art, due to the lack of a tooling for connecting the left and right axle legs of the electric drive axle, when performing airtightness detection on the electric drive axle, it is necessary to perform airtightness detection on the left and right axle legs separately, resulting in low efficiency of airtightness detection of the electric drive axle and affecting the production efficiency of the electric drive axle.

[0004] Therefore, a new method is needed to solve the above technical problems. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide an electric drive axle production process, a leak detection mechanism for an electric drive axle, and a production method thereof, which are used to solve the problem of low production efficiency of electric drive axles in the prior art.

[0006] To achieve the above purpose and other related purposes, the present invention provides a leak detection mechanism for an electric drive axle, which is specifically arranged as follows: including a connection main body, a first connection part, and a second connection part. The connection main body is set as a hollow structure, and both the first end and the second end of the connection main body arranged oppositely are set as openings. An air pipe interface communicating with the hollow structure is further arranged on the connection main body for connecting the leak detection air pipe of the leak detector; the first connection part is provided with a first through hole and sleeved on the first end of the connection main body for connecting the left axle leg of the electric drive axle; the second connection part is provided with a second through hole and sleeved on the second end of the connection main body for connecting the right axle leg of the electric drive axle.

[0007] Optionally, a lifting ring is arranged in the middle of the connection main body; and / or, both the first connection part and the second connection part are set as disc structures, and a placement platform is arranged on the outer periphery of the disc structure.

[0008] Optionally, the leak detection mechanism of the electric drive axle further includes a plurality of reinforcing ribs, which are connected to both the connecting body and the first connecting portion, and the connecting body and the second connecting portion at the same time, and the plurality of reinforcing ribs are distributed along the circumferential direction of the connecting body.

[0009] Optionally, on the side of the reinforcing rib close to the first connecting portion or the second connecting portion, the width in the radial direction of the connecting body gradually increases.

[0010] Optionally, on the sides of the first connecting portion and the second connecting portion facing away from the connecting body, there are dovetail grooves arranged circumferentially, and sealing elements are arranged in the dovetail grooves.

[0011] The present invention also provides a production method of the leak detection mechanism of the electric drive axle. A welding tooling is used to position the leak detection mechanism of the electric drive axle during production. The production method of the leak detection mechanism of the electric drive axle includes:

[0012] Coarsely position the first connecting portion and the second connecting portion through the base of the welding tooling, wherein the base has a first limiting groove and a second limiting groove arranged oppositely. Place the first connecting portion in the first limiting groove and place the second connecting portion in the second limiting groove;

[0013] Pass the connecting body through the first through hole of the first connecting portion and the second through hole of the second connecting portion to sleave the first connecting portion and the second connecting portion on the connecting body;

[0014] Precisely position the first connecting portion and the second connecting portion through the limiting struts of the welding tooling. Connect the two ends of the limiting struts to the first connecting portion and the second connecting portion respectively, and set the limiting struts opposite to the base;

[0015] Adopt welding to fixedly connect the first connecting portion and the second connecting portion to the connecting body respectively, and fixedly connect the air pipe interface to the connecting body.

[0016] Optionally, the production method of the leak detection mechanism of the electric drive axle further includes:

[0017] Rotate the positioning plate hinged to the base on the welding tooling until it abuts against the outer side wall of the connecting body;

[0018] Abut one side in the width direction of the lifting ring against the side wall of the positioning plate, and align one end in the length direction of the lifting ring with the end of the side wall and place them;

[0019] Adopt welding to fixedly connect the lifting ring to the outer side wall of the connecting body.

[0020] Optionally, the production method of the electric drive axle leak detection mechanism further includes:

[0021] After the welding of the electric drive axle leak detection mechanism is completed, disassemble the connection between the limit strut and the first connecting part and the second connecting part;

[0022] Place the adjusting strut of the welding fixture between the first connecting part and the second connecting part, extend the length of the adjusting strut, increase the distance between the first connecting part and the second connecting part, so as to disassemble the limit strut, and take out the electric drive axle leak detection mechanism from the welding fixture;

[0023] Shorten the length of the adjusting strut to remove the adjusting strut from the electric drive axle leak detection mechanism.

[0024] Optionally, before assembling the electric drive axle leak detection mechanism, the production method of the electric drive axle leak detection mechanism further includes:

[0025] Machine installation holes on the connection main body to determine the installation position of the air pipe interface;

[0026] Draw the welding positions of the reinforcing ribs on the first connecting part and the second connecting part to position the reinforcing ribs.

[0027] The present invention also provides an electric drive axle production process, which uses the electric drive axle leak detection mechanism described in any one of the above to assist in the production of the electric drive axle. The electric drive axle production process includes:

[0028] Connect the left bridge leg of the electric drive axle to the first connecting part, and connect the right bridge leg of the electric drive axle to the second connecting part;

[0029] Connect the leak detection air pipe to the air pipe interface to complete the leak detection of the electric drive axle;

[0030] After the leak detection is qualified, transfer the electric drive axle connected with the electric drive axle leak detection mechanism to the painting line to complete the painting of the electric drive axle;

[0031] After the painting of the electric drive axle is completed, take down the electric drive axle from the electric drive axle leak detection mechanism.

[0032] As described above, an electric drive axle production process, an electric drive axle leak detection mechanism and its production method of the present invention have the following beneficial effects:

[0033] By providing a connecting body with a first connecting part and a second connecting part sleeved at both ends thereof, the left bridge leg of the electric drive axle is connected to the first connecting part, and the right bridge leg of the electric drive axle is connected to the second connecting part. After the air pipe interface on the connecting body is connected to the air leakage test pipe of the air leakage testing machine, the left and right bridge legs of the electric drive axle can be simultaneously subjected to air leakage detection, which helps to shorten the air leakage detection time of the electric drive axle, and further helps to shorten the production time of the electric drive axle and improve the production efficiency of the electric drive axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 FIG. shows a schematic structural view of an electric drive axle according to an embodiment of the present invention;

[0035] Figure 2 FIG. shows a schematic structural view of an air leakage testing mechanism of an electric drive axle according to an embodiment of the present invention;

[0036] Figure 3 FIG. shows a schematic application structural view of an air leakage testing mechanism of an electric drive axle according to an embodiment of the present invention;

[0037] Figure 4 Shown as Figure 3 a schematic cross-sectional structural view of;

[0038] Figure 5 Shown as Figure 3 a schematic structural view of a partial area A in;

[0039] Figure 6 FIG. shows a schematic structural view of a welding tooling according to an embodiment of the present invention;

[0040] Figure 7 FIG. shows a schematic application structural view of a welding tooling according to an embodiment of the present invention;

[0041] Figure 8 Shown as Figure 7 a schematic cross-sectional structural view of;

[0042] Figure 9 FIG. shows a schematic structural view of an adjusting strut according to an embodiment of the present invention.

[0043] DESCRIPTION OF THE REFERENCE NUMERALS

[0044] 1 - Electric drive axle; 11 - Left bridge leg; 12 - Right bridge leg;

[0045] 2 - Connecting body; 21 - Air pipe interface; 22 - Suspension ring;

[0046] 3 - First connecting part; 31 - Placing platform; 32 - Dovetail groove; 33 - Sealing member;

[0047] 4 - Second connecting part;

[0048] 5 - Reinforcing rib;

[0049] 6 - Base; 61 - First limiting groove; 62 - Second limiting groove;

[0050] 7 - Limiting support rod;

[0051] 8 - Positioning plate; 81 - Connecting rod;

[0052] 9 - Adjusting support rod; 91 - First adjusting part; 92 - Second adjusting part. Specific implementation manner

[0053] The following uses specific specific examples to illustrate the implementation manner of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0054] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the illustrations, rather than being drawn according to the number, shape, and size of the components in actual implementation. The forms, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the layout form of the components may also be more complex. The structures, proportions, sizes, etc. shown in the illustrations of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0055] Before elaborating on the leak detection mechanism of the electric drive axle of this application in detail, first explain the structure of the electric drive axle 1. Please refer to Figure 1 The electric drive axle 1 includes a left axle leg 11 and a right axle leg 12.

[0056] Please refer to Figure 2 and Figure 3, the present invention provides a leak detection mechanism for an electric drive axle, including a connection body 2, a first connection part 3, and a second connection part 4. Among them, the connection body 2 is set as a hollow structure, and both the first end and the second end of the connection body 2 arranged oppositely are set as openings. The first connection part 3 is provided with a first through hole, through which the first connection part 3 is sleeved on the first end of the connection body 2 for connecting the left bridge leg 11 of the electric drive axle 1; the second connection part 4 is provided with a second through hole, through which the second connection part 4 is sleeved on the second end of the connection body 2 for connecting the right bridge leg 12 of the electric drive axle 1, so that both the left bridge leg 11 and the right bridge leg 12 of the electric drive axle 1 are communicated with the connection body 2. A tracheal interface 21 is also arranged on the connection body 2, and the tracheal interface 21 is communicated with the hollow structure and is used for connecting the leak detection trachea of the leak detector. When the leak detection trachea is connected to the tracheal interface 21, the leak detection of both the left bridge leg 11 and the right bridge leg 12 of the electric drive axle 1 can be carried out simultaneously, which is beneficial to shortening the leak detection time of the electric drive axle 1, and further beneficial to shortening the production time of the electric drive axle 1 and improving the production efficiency of the electric drive axle 1.

[0057] In an example, the first connection part 3 and the second connection part 4 can be set as disc structures. In order to facilitate placing the leak detection mechanism of the electric drive axle of the present application, a placement platform 31 is arranged on the outer periphery of the disc structure.

[0058] Exemplarily, the connection body 2 includes but is not limited to being set as a cylindrical structure, etc. The connection body 2, the first connection part 3, and the second connection part 4 can be connected by welding or other means.

[0059] Please refer to Figure 3 and Figure 4 , in some embodiments, in order to strengthen the stability of the connection between the first connection part 3 and the second connection part 4 and the connection body 2, reinforcing ribs 5 are installed at the connection parts between the connection body 2 and the first connection part 3, and between the connection body 2 and the second connection part 4. A plurality of such reinforcing ribs 5 are provided and distributed along the circumferential direction of the connection body 2. The number of the reinforcing ribs 5 can be set to 2, 3, 4, 5, etc., and is set according to actual needs.

[0060] In an application example, four reinforcing ribs 5 are arranged at the connection parts between the connection body 2 and the first connection part 3, and between the connection body 2 and the second connection part 4, and the above four reinforcing ribs 5 are evenly distributed along the circumferential direction of the connection body 2.

[0061] Exemplarily, on the side of the reinforcing rib 5 close to the first connecting portion 3 or the second connecting portion 4, the width in the radial direction of the connecting body 2 gradually increases. That is, the width of the side of the reinforcing rib 5 close to the middle of the connecting body 2 in the radial direction of the connecting body 2 is smaller than the width of the side of the reinforcing rib 5 close to the first connecting portion 3 or the second connecting portion 4 in the radial direction of the connecting body 2, so that the reinforcing rib 5 forms a structure similar to an "L" shape, to avoid interference between the crane and the reinforcing rib 5 when the crane hoists the electric drive axle leak detection mechanism of the present application, and to prevent safety risks such as deflection of the electric drive axle leak detection mechanism; and such a setting is beneficial to preventing the connecting body 2 from rotating, and increases the safety of the electric drive axle leak detection mechanism of the present application during the working process.

[0062] Please refer to Figure 5 , in some embodiments, on the side of the first connecting portion 3 and the second connecting portion 4 facing away from the connecting body 2, there are dovetail grooves 32 arranged circumferentially. A sealing member 33 is arranged in the dovetail groove 32 to ensure the airtightness between the left bridge leg 11 of the electric drive axle 1 and the first connecting portion 3, and between the right bridge leg 12 of the electric drive axle 1 and the second connecting portion 4 after connection, and thus ensure the smooth progress of the leak detection of the electric drive axle 1. Moreover, the width of the opening of the dovetail groove 32 is smaller than the width of the bottom of the dovetail groove 32, so that the setting of the dovetail groove 32 is beneficial to preventing the sealing member 33 from falling off.

[0063] Exemplarily, the sealing member 33 includes but is not limited to being set as a sealing ring, etc.

[0064] In some embodiments, a lifting ring 22 is arranged on the connecting body 2. During the installation of the electric drive axle 1, the left bridge leg 11 of the electric drive axle 1 and the first connecting portion 3, and the right bridge leg 12 of the electric drive axle 1 and the second connecting portion 4 are detachably connected by screws and nuts. At this time, the left bridge leg 11 of the electric drive axle 1 and the first connecting portion 3, and the right bridge leg 12 of the electric drive axle 1 and the second connecting portion 4 are fastened. The crane transports the electric drive axle leak detection mechanism with the electric drive axle 1 installed through the lifting ring 22 to the assembly line for subsequent leak detection. It should be noted that the lifting ring 22 is located in the middle of the connecting body 2 to avoid deflection or even dropping of the electric drive axle leak detection mechanism with the electric drive axle 1 installed during the hoisting process.

[0065] Exemplarily, the lifting ring 22 can be installed on the connecting body 2 by welding or other means.

[0066] The present invention also provides a production method for an electric drive axle leak detection mechanism. The above-mentioned electric drive axle leak detection mechanism of the present application is produced by welding, and is positioned by a welding fixture during the welding process. The production method of the electric drive axle leak detection mechanism of the present application can include steps S110 to S150, which are introduced in detail as follows:

[0067] Step S110, roughly position the first connecting part 3 and the second connecting part 4 through the base 6 of the welding tooling. The base 6 has a first limiting groove 61 and a second limiting groove 62 which are oppositely arranged. Place the first connecting part 3 in the first limiting groove 61 and place the second connecting part 4 in the second limiting groove 62.

[0068] Please refer to Figure 6 and Figure 7 , in some embodiments, the welding tooling includes a base 6 which has a first limiting groove 61 and a second limiting groove 62 that are oppositely arranged. Place the first connecting part 3 of the electric drive axle leak detection mechanism in the first limiting groove 61 respectively, and place the second connecting part 4 of the electric drive axle leak detection mechanism in the second limiting groove 62, so as to roughly position the positions of the first connecting part 3 and the second connecting part 4.

[0069] It should be noted that the placement platforms 31 of the first connecting part 3 and the second connecting part 4 are respectively located in the first limiting groove 61 and the second limiting groove 62, so that the first connecting part 3 is stably placed in the first limiting groove 61 and the second connecting part 4 is stably placed in the second limiting groove 62.

[0070] In one example, before roughly positioning the first connecting part 3 and the second connecting part 4, it is necessary to determine the positions for installing the reinforcing ribs 5 on the first connecting part 3 and the second connecting part 4. The installation positions of the reinforcing ribs 5 can be drawn on the first connecting part 3 and the second connecting part 4 through a scribing template. When roughly positioning the first connecting part 3 and the second connecting part 4, the sides of the first connecting part 3 and the second connecting part 4 where the installation positions of the reinforcing ribs 5 are drawn are oppositely arranged.

[0071] Step S120, pass the connecting body 2 through the first through hole of the first connecting part 3 and the second through hole of the second connecting part 4, so as to sleeved the first connecting part 3 and the second connecting part 4 on the connecting body 2.

[0072] In some embodiments, after the first connecting part 3 and the second connecting part 4 are roughly positioned, pass the connecting body 2 through the first through hole of the first connecting part 3 and the second through hole of the second connecting part 4, so that the first connecting part 3 and the second connecting part 4 are sleeved on the connecting body 2, preparing for the subsequent welding of the first connecting part 3 and the second connecting part 4 with the connecting body 2.

[0073] Step S130, precisely position the first connecting part 3 and the second connecting part 4 through the limiting strut 7 of the welding tooling. Connect the two ends of the limiting strut 7 with the first connecting part 3 and the second connecting part 4 respectively, and set the limiting strut 7 opposite to the base 6.

[0074] In some embodiments, in order to precisely position the first connection part 3 and the second connection part 4, a limiting strut 7 is connected between the first connection part 3 and the second connection part 4 by a detachable fastener, and the length of the limiting strut 7 is the same as the preset distance between the first connection part 3 and the second connection part 4, and the limiting strut 7 is arranged opposite to the base 6.

[0075] It should be noted that after the first connection part 3 and the second connection part 4 are precisely positioned, the two ends of the connection body 2 are placed flush with the sides of the first connection part 3 and the second connection part 4 facing away from the connection body 2 .

[0076] Step S140 , respectively fixing the first connection part 3 and the second connection part 4 to the connection body 2 by welding, and fixing the air pipe interface 21 to the connection body 2 .

[0077] In some embodiments, after the connection body 2, the first connection part 3 and the second connection part 4 are positioned, the connection body 2 and the first connection part 3, and the connection body 2 and the second connection part 4 are fixedly connected by full welding. The air pipe interface 21 is fixedly connected to the connection body 2.

[0078] In some embodiments, before the connection body 2 passes through the first through hole of the first connection part 3 and the second through hole of the second connection part 4, it is necessary to process a mounting hole on the connection body 2 to mount the trachea interface 21 at the mounting hole. The mounting hole can be set as a threaded hole, and the trachea interface 21 is fixed to the connection body 2 by threaded connection. After the trachea interface 21 and the connection body 2 are installed, the trachea interface 21 is connected to the hollow structure of the connection body 2.

[0079] After the main structure of the electric drive axle leak test mechanism is welded, a hook needs to be welded. Therefore, the production method of the electric drive axle leak test mechanism of the present application further includes steps S210 to S240, which are described in detail as follows:

[0080] Step S210 , rotating the positioning plate 8 hinged to the base 6 on the welding fixture until it abuts against the outer wall of the connecting body 2 .

[0081] See also Figure 6 and Figure 7 In some embodiments, the welding tool further includes a positioning plate 8 hinged on the base 6, the positioning plate 8 is hinged to the base 6 through a connecting rod 81, and can rotate relative to the base 6. When the lifting ring 22 needs to be welded, the positioning plate 8 is rotated to make the bottom of the positioning plate 8 abut against the outer wall of the connecting body 2.

[0082] Step S220 , placing one side of the hanging ring 22 in the width direction against the side wall of the positioning plate 8 , and aligning one end of the hanging ring 22 in the length direction with the end of the side wall.

[0083] Please refer to Figure 8 , in some embodiments, after the bottom of the positioning plate 8 abuts against the outer side wall of the connecting body 2, the lifting ring 22 is placed according to the position of the positioning plate 8. Specifically, one side in the width direction of the lifting ring 22 is abutted against the side wall of the positioning plate 8, and one end in the length direction of the lifting ring 22 is aligned with the end of the side wall, so as to position the position of the lifting ring 22 on the connecting body 2 through the positioning plate 8.

[0084] Exemplarily, the width of the side wall of the positioning plate 8 abutted by the lifting ring 22 may be the same as or different from the length dimension of the lifting ring 22. When the width of the side wall of the positioning plate 8 is the same as the length dimension of the lifting ring 22, one end in the length direction of the lifting ring 22 is aligned with any end of the side wall; when the width of the side wall of the positioning plate 8 is different from the length dimension of the lifting ring 22, one end in the length direction of the lifting ring 22 is aligned with the selected end of the side wall.

[0085] Step S230, fixedly connect the lifting ring 22 to the outer side wall of the connecting body 1 by welding.

[0086] In some embodiments, after the positioning of the lifting ring 22 is completed, in order to ensure the stability of the connection between the lifting ring 22 and the connecting body 2, it is preferably to fixedly connect the lifting ring 22 to the outer side wall of the connecting body 1 by full welding.

[0087] After the welding of the electric drive axle leak detection mechanism is completed, it is necessary to remove the electric drive axle leak detection mechanism from the welding fixture. Therefore, the production method of the electric drive axle leak detection mechanism of the present application further includes steps S310 to S340, which are introduced in detail as follows:

[0088] Step S310, after the welding of the electric drive axle leak detection mechanism is completed, disassemble the connection between the limit support rod 7 and the first connecting portion 3 and the second connecting portion 4.

[0089] In some embodiments, after the welding of the electric drive axle leak detection mechanism is completed, it is necessary to remove the electric drive axle leak detection mechanism from the welding fixture. First, disassemble the fasteners between the limit support rod 7 and the first connecting portion 3 and between the limit support rod 7 and the second connecting portion 4. Due to the stress deformation generated during the welding of the electric drive axle leak detection mechanism, the distance between the first connecting portion 3 and the second connecting portion 4 is reduced, so that the limit support rod 7 cannot be removed from the electric drive axle leak detection mechanism.

[0090] Step S320, place the adjusting support rod 9 of the welding fixture between the first connecting portion and the second connecting portion, extend the length of the adjusting support rod 9, increase the distance between the first connecting portion 3 and the second connecting portion 4, so as to disassemble the limit support rod 7 and take out the electric drive axle leak detection mechanism from the welding fixture.

[0091] In some embodiments, the adjusting strut 9 is a telescopic structure. After shortening the adjusting strut 9, it is placed between the first connecting portion and the second connecting portion. Subsequently, the length of the adjusting strut 9 is extended such that both ends of the adjusting strut 9 respectively abut between the first connecting portion 3 and the second connecting portion 4. The length of the adjusting strut 9 is further extended to increase the spacing between the first connecting portion 3 and the second connecting portion 4, thereby removing the limiting strut 7 and taking out the electric drive axle leak detection mechanism from the welding fixture.

[0092] It should be noted that the adjusting strut 9 can be placed near the limiting strut 7 so as to take out the limiting strut 7 from the electric drive axle leak detection mechanism. The adjusting strut 9 can also be placed near the first limiting groove 61 or the second limiting groove 62 so as to take out the electric drive axle leak detection mechanism from the welding fixture.

[0093] After both ends of the adjusting strut 9 respectively abut between the first connecting portion 3 and the second connecting portion 4, the length of the adjusting strut 9 is further extended until the limiting strut 7 can be taken out and the electric drive axle leak detection mechanism can be taken out from the welding fixture, so as to avoid damaging the connection between the connecting body 2, the first connecting portion 3 and the second connecting portion 4.

[0094] Please refer to Figure 9 , for example, the adjusting strut 9 can include a connected first adjusting portion 91 and a second adjusting portion 92, and the first adjusting portion 91 and the second adjusting portion 92 can move relatively closer or farther away from each other. When the first adjusting portion 91 and the second adjusting portion 92 move relatively closer to each other, the adjusting strut 9 is shortened. When the first adjusting portion 91 and the second adjusting portion 92 move relatively farther away from each other, the adjusting strut 8 is extended. When the adjusting strut 9 is extended, it can assist in taking out the electric drive axle leak detection mechanism from the welding fixture.

[0095] Step S330, shorten the length of the adjusting strut 9 to remove the adjusting strut 9 from the electric drive axle leak detection mechanism.

[0096] In some embodiments, after the electric drive axle leak detection mechanism is taken out from the welding fixture, the length of the adjusting strut 9 is shortened to remove the adjusting strut 9 from the electric drive axle leak detection mechanism.

[0097] The present invention also provides a production process for the electric drive axle 1.

[0098] Before describing the production process of the electric drive axle of the present application in detail, the production process of the electric drive axle in the prior art will be described first. In the prior art, the electric drive axle 1 needs to be installed on the spraying tooling for online spraying; after spraying, the electric drive axle 1 is taken off the painting line, transported to the leak detection area, and removed from the spraying tooling; then, the left axle leg 11 or the right axle leg 12 of the electric drive axle 1 is hermetically assembled respectively for leak detection. In the above production process, the left axle leg 11 and the right axle leg 12 of the electric drive axle 1 need to be repeatedly installed and disassembled, which seriously reduces the production efficiency of the electric drive axle 1.

[0099] The production process of the electric drive axle of the present application specifically includes steps S410 to S440, which are introduced in detail as follows.

[0100] Step S410: Connect the left axle leg 11 of the electric drive axle 1 to the first connection part 3, and connect the right axle leg 12 of the electric drive axle 1 to the second connection part 4.

[0101] In some embodiments, in the case of having the above-mentioned electric drive axle leak detection mechanism, before performing leak detection, the left axle leg 11 of the electric drive axle 1 is installed together with the first connection part 3 of the electric drive axle leak detection mechanism, and the right axle leg 12 of the electric drive axle 1 is installed together with the second connection part 4 of the electric drive axle leak detection mechanism, so that the electric drive axle 1 is installed on the electric drive axle leak detection mechanism for leak detection.

[0102] In an application example, the electric drive axle 1 is locked on the electric drive axle leak detection mechanism by artificial using fasteners. At this time, the electric drive axle 1 and the electric drive axle leak detection mechanism are completely fastened. Then, the electric drive axle leak detection mechanism connected with the electric drive axle 1 is transported to the assembly line by hooking the lifting ring 22 on the electric drive axle leak detection mechanism by a crane for leak detection.

[0103] Step S420: Connect the leak detection air pipe to the air pipe interface 21 to complete the leak detection of the electric drive axle 1.

[0104] In some embodiments, after the electric drive axle 1 and the electric drive axle leak detection mechanism are completely fastened, the electric drive axle 1 is transported to the leak detection area. Then, the leak detection air pipe of the leak detector is connected to the air pipe interface 21 of the electric drive axle leak detection mechanism to complete the leak detection of the electric drive axle 1.

[0105] Step S430: After the leak detection is qualified, the electric drive axle 1 connected with the electric drive axle leak detection mechanism is transported to the painting line to complete the painting of the electric drive axle 1.

[0106] In some embodiments, after the leak detection of the electric drive axle 1 is qualified, the electric drive axle 1 connected with the electric drive axle leak detection mechanism is transported to the painting line to perform painting operations on the electric drive axle 1. That is, after the leak detection of the electric drive axle 1 is qualified, it does not need to be taken offline, nor does it need to be disassembled from the electric drive axle leak detection mechanism, and the time for installing the painting tooling is also saved. It can directly enter the painting line, which is beneficial to shortening the production time of the electric drive axle 1 and improving the production efficiency of the electric drive axle 1. And when painting, the electric drive axle leak detection mechanism acts as a painting tooling, and a separate painting tooling is no longer needed, which is beneficial to reducing costs.

[0107] It should be noted that for the electric drive axle 1 with unqualified leak detection, it needs to be returned for repair or scrapped.

[0108] Step S440, after the painting of the electric drive axle 1 is completed, the electric drive axle 1 is removed from the electric drive axle leak detection mechanism.

[0109] In some embodiments, after the painting of the electric drive axle 1 is completed and the paint on the electric drive axle 1 is dried, the electric drive axle 1 is disassembled from the electric drive axle leak detection mechanism so that the electric drive axle leak detection mechanism can be put into use for the leak detection and painting of the next electric drive axle 1.

[0110] In the above production process of the electric drive axle 1, the electric drive axle 1 only needs to be installed once to complete the leak detection and painting of the electric drive axle 1, and the electric drive axle 1 does not need to be taken offline from the crane throughout the process, which is beneficial to improving the production efficiency of the electric drive axle 1.

[0111] The above embodiments only illustrate the principles and effects of the present invention by way of example, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An electric drive axle leak testing mechanism, characterized in that: include: The connecting body is configured as a hollow structure, and the first end and the second end of the connecting body are both configured to be open, and the connecting body is also provided with an air pipe interface connected to the hollow structure, which is used to connect the leak test air pipe of the leak tester; A first connecting portion, provided with a first through hole and sleeved on a first end of the connecting body, for connecting a left bridge leg of the electric drive bridge; The second connecting portion is provided with a second through hole and is sleeved on the second end of the connecting body, and is used for connecting the right bridge leg of the electric drive bridge.

2. The electric drive axle leak testing mechanism according to claim 1, characterized in that: A lifting ring is arranged in the middle of the connecting body; and / or, the first connecting part and the second connecting part are both arranged as disc structures, and a placing platform is arranged on the periphery of the disc structure.

3. The electric drive axle leak testing mechanism according to claim 1 or 2, characterized in that: The electric drive axle leak test mechanism also includes a plurality of reinforcing ribs, which are simultaneously connected to the connection body and the first connection portion, and the connection body and the second connection portion, and the plurality of reinforcing ribs are distributed along the circumference of the connection body.

4. The electric drive axle leak test mechanism according to claim 3, characterized in that: The width of the reinforcing rib on one side close to the first connecting portion or the second connecting portion along the radial direction of the connecting body gradually increases.

5. The electric drive axle leak testing mechanism according to claim 3, characterized in that: The first connection part and the second connection part each have a dovetail groove arranged circumferentially on one side away from the connection body, and a sealing member is arranged in the dovetail groove.

6. A method for producing an electric drive axle leak test mechanism, characterized in that: The electric drive axle leak test mechanism according to any one of claims 1 to 5 is positioned during the production process by using welding tooling, and the production method of the electric drive axle leak test mechanism comprises: The first connection part and the second connection part are roughly positioned by a base of a welding tool, wherein the base has a first limiting groove and a second limiting groove arranged opposite to each other, the first connection part is placed in the first limiting groove, and the second connection part is placed in the second limiting groove; Pass the connection body through the first through hole of the first connection part and the second through hole of the second connection part, so as to sleeve the first connection part and the second connection part on the connection body; The first connection part and the second connection part are precisely positioned by the limiting strut of the welding tool, the two ends of the limiting strut are respectively connected to the first connection part and the second connection part, and the limiting strut is arranged opposite to the base; the first connection part and the second connection part are respectively fixed to the connection body by welding, and the air pipe interface is fixed to the connection body.

7. The method for producing the electric drive axle leak test mechanism according to claim 6, characterized in that: The production method of the electric drive axle leak testing mechanism also includes: Rotate the positioning plate on the welding fixture that is hinged to the base until it abuts against the outer side wall of the connecting body; Place one side of the lifting ring in the width direction against the side wall of the positioning plate, and align one end of the lifting ring in the length direction with the end of the side wall; The lifting ring is fixedly connected to the outer side wall of the connecting body by welding.

8. The method for producing the electric drive axle leak test mechanism according to claim 7, characterized in that: The production method of the electric drive axle leak testing mechanism also includes: After the welding of the electric drive axle leak test mechanism is completed, the connection between the limit support rod and the first connection part and the second connection part is disassembled; Placing the adjusting strut of the welding tool between the first connecting part and the second connecting part, extending the length of the adjusting strut, and increasing the distance between the first connecting part and the second connecting part, so as to disassemble the limiting strut, and take out the electric drive axle leakage test mechanism from the welding tool; The length of the adjusting strut is shortened to remove the adjusting strut from the electric drive axle leak testing mechanism.

9. The method for producing the electric drive axle leak test mechanism according to any one of claims 6 to 8, characterized in that: Before the electric drive axle leak test mechanism is assembled, the production method of the electric drive axle leak test mechanism further includes: Processing a mounting hole on the connecting body to determine the mounting position of the trachea interface; The welding positions of the reinforcing ribs are marked on the first connecting portion and the second connecting portion to locate the reinforcing ribs.

10. A production process for an electric drive axle, characterized in that: The electric drive axle leakage test mechanism as claimed in any one of claims 1 to 5 is used to assist in the production of the electric drive axle, and the electric drive axle production process includes: Connect the left bridge leg of the electric drive axle to the first connection portion, and connect the right bridge leg of the electric drive axle to the second connection portion; Connecting the leak test air pipe to the air pipe interface to complete the leak test of the electric drive axle; After the leak test is qualified, the electric drive axle connected with the electric drive axle leak test mechanism is transported to a coating line to complete the coating of the electric drive axle; After the electric drive axle is painted, the electric drive axle is removed from the electric drive axle leak testing mechanism.

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