Die-casting die of electric drive shell

Abstract

The invention relates to a die-casting die of an electric drive shell, and belongs to the technical field of die-casting dies. The die-casting die comprises a movable die body, a fixed die body and a vacuum valve assembly, the vacuum valve assembly comprises a fixed valve body, a vacuum valve communicated with an inner cavity of the fixed valve body and a sealing valve element installed on the fixed valve body in a sliding mode, and an air exhaust notch communicated with the fixed valve body is formed in the end of the sealing valve element. The fixed valve body is provided with a sealing ring groove for the sealing column to abut against in a sealing mode. The sealing valve element is provided with a first station and a second station, when the sealing valve element is located at the first station, the air exhaust notch and the sealing ring groove are staggered, and the valve body and the cavity are communicated and fixed through the air exhaust notch; when the vacuum valve body is started, the sealing valve element slides towards the interior of the fixed valve body under the pushing action of the melt, when the air exhaust notch corresponds to the sealing ring groove, the sealing valve element serves as a second station, and at the moment, the fixed valve body and the cavity are isolated in a sealed mode. The effect of simplifying the structure of the vacuum pump assembly is achieved.

Description

Technical Field

[0001] This application relates to the technical field of die-casting molds, and particularly to a die-casting mold for an electric drive housing. Background Art

[0002] The electric vehicle motor housing is a key component for protecting the internal components of the motor, and is mainly used in the electric drive system of electric vehicles or rail transit.

[0003] The electric vehicle motor housing is generally manufactured by a die-casting mold. In high-pressure casting, due to a large amount of gas in the mold cavity, the gas content of the product will be relatively high, affecting the service performance of the product; the die-casting mold needs to be provided with a vacuum pump assembly at the end of the cavity for evacuating the air in the cavity. The current vacuum pump assembly includes a sealing pipe of a vacuum valve body. During die-casting, the air in the cavity is extracted through the vacuum valve body. After the aluminum liquid moves to the end of the cavity, the vacuum valve body is sealed through the sealing pipe. The above-mentioned vacuum pump assembly has a complex structure, and the aluminum liquid may overflow from the cavity under the instantaneous pressure. Summary of the Invention

[0004] In order to simplify the vacuum pump assembly and reduce the situation of aluminum liquid overflow, this application provides a die-casting mold for an electric drive housing.

[0005] The die-casting mold for an electric drive housing provided by this application adopts the following technical solutions: A die-casting mold for an electric drive housing includes a moving mold, a stationary mold, and a vacuum valve assembly provided on the moving mold. The vacuum valve assembly includes a fixed valve body, a vacuum valve communicating with the inner cavity of the fixed valve body, and a sealing valve core slidably mounted in the fixed valve body. An air extraction notch communicating with the fixed valve body is formed at the end of the sealing valve core, and the fixed valve body is provided with a sealing ring groove for the sealing column to seal and abut against. The sealing valve core has a first working position and a second working position. When the sealing valve core is in the first working position, the air extraction notch and the sealing ring groove are staggered, and the fixed valve body and the cavity are communicated through the air extraction notch; when the vacuum valve body is started, the sealing valve core slides into the fixed valve body under the pushing action of the melt. When the air extraction notch and the sealing ring groove correspond, the sealing valve core is in the second working position, and at this time, the fixed valve body and the cavity are sealed and isolated from each other.

[0006] By adopting the above technical solutions, the sealing valve core slides back and forth in the fixed valve body. When the sealing valve core is in the first working position, the cavity and the inner part of the fixed valve body are communicated. As the vacuum valve extracts the air in the cavity, the aluminum liquid in the cavity pushes the sealing valve core to slide into the fixed valve body. After the sealing valve core is in the second working position, the inside of the fixed valve body and the cavity are sealed and isolated from each other, ensuring the molding quality. The above-mentioned vacuum valve assembly has a simplified structure and an ideal sealing effect.

[0007] Optionally, the sealing valve core includes a sliding portion located within the fixed valve body and a sealing portion provided at one end of the sliding portion. The air extraction notch is provided on the outer sidewall of the sealing portion, and the outer diameter of the sealing portion is greater than or equal to that of the sliding portion. The sealing ring groove is sealingly adapted to the sealing portion.

[0008] By adopting the above technical solution, the structural composition of the sealing valve core is specifically disclosed. The outer diameter of the sealing portion is greater than that of the sliding portion, so that when the sealing valve core is in the second working position, the sealing contact area between the sealing valve body and the fixed valve body is increased, and the sealing stability of the sealing valve core is improved.

[0009] Optionally, a limiting portion is provided at the other end of the sealing valve core. The fixed valve body is provided with a sealing chamber for arranging the sliding portion and a limiting chamber for sealingly arranging the limiting portion. The sealing chamber corresponds to the vacuum valve. The fixed valve body is provided with a limiting block for axially limiting the limiting portion in the limiting chamber.

[0010] By adopting the above technical solution, the cooperation setting of the limiting portion and the limiting block can limit the axial sliding of the sealing valve core. At the same time, the sealing contact between the limiting portion and the limiting chamber realizes the sealing effect at the other end of the sealing valve core.

[0011] Optionally, the air extraction notch is symmetrically arranged along the axis of the sealing portion, and the air extraction notch has a concave arc surface on the side facing the axis of the sealing portion.

[0012] By adopting the above technical solution, the air extraction notch is symmetrically arranged along the axis of the sealing portion to ensure the uniformity of air extraction. At the same time, the setting of the concave arc surface can further increase the air extraction volume in the same time compared with the horizontal plane, improving the air extraction effect.

[0013] Optionally, an inner groove for being pushed by molten aluminum is provided at the end of the sealing portion.

[0014] By adopting the above technical solution, the setting of the inner groove enables the flowing molten aluminum to be stored in the inner groove, improving the pushing effect of the molten aluminum on the sealing valve core.

[0015] Optionally, the vacuum valve assembly further includes an overflow connection block connecting the cavity and the fixed valve body. The overflow connection block is provided with an installation jack for inserting the fixed valve body, and the overflow connection block is provided with a connecting pipeline connecting the cavity.

[0016] By adopting the above technical solution, the setting of the overflow connection block connects the vacuum valve assembly and the cavity. The fixed valve body is inserted into the installation jack, simplifying the installation structure of the fixed valve body and improving the stability of the fixed valve body. The setting of the connecting pipeline can reduce the probability of molten aluminum overflowing and leaking out.

[0017] Optionally, the connecting pipeline includes a conveying channel and an overflow channel. Both ends of the conveying channel communicate with the cavity and the inner groove. One end of the conveying channel is provided with a conveying sink for arranging the sealing part. The axial length of the conveying sink is greater than the moving distance of the limiting part. The overflow channels are arranged at intervals on opposite sides of the conveying channel.

[0018] By adopting the above technical solution, the composition of the connecting pipeline is further disclosed. The conveying channel directly communicates with the cavity and the inner groove, enabling the molten aluminum to directly push the sealing valve core, and the pushing effect is more ideal. The setting of the overflow channel can store the overflow of the molten aluminum conveyed subsequently.

[0019] Optionally, the fixed valve body is provided with an annular arrangement groove in the sealing ring groove, and an annular sealing ring is arranged in the annular arrangement groove. The inner diameter of the annular sealing ring is smaller than the inner diameter of the sealing ring groove. The outer side wall of the sealing part is provided with a pressing groove for cooperating with the annular sealing ring.

[0020] By adopting the above technical solution, the setting of the annular sealing ring in the annular arrangement groove and the inner diameter of the annular sealing ring being smaller than that of the sealing ring groove enable the annular sealing ring to be pressed and deformed under the action of the sealing part and finally snap into the pressing groove after the sealing valve core moves to the second working position, improving the sealing effect between the sealing part and the fixed valve body.

[0021] Optionally, the fixed valve body is provided with a connecting part at one end far from the sealing part, and a sliding driving part is arranged at one end of the fixed valve body far from the cavity. A connecting block is arranged between the sliding driving part and the connecting part.

[0022] By adopting the above technical solution, the fixed valve body can axially move under the action of the sliding driving part. The fixed valve body and the sliding driving part are fixed by cooperation with the connecting block. When the product is demolded, the sliding driving part is started to drive the fixed valve body and the sealing valve core to move simultaneously, so that the sealing valve core disengages from the conveying sink, facilitating the demolding of the product.

[0023] Optionally, connecting grooves for the cooperation and fixation of the connecting part and the sliding driving part are arranged on both opposite sides of the connecting block. An induction block is further arranged on the top of the connecting block. Two groups of micro switches are arranged on the moving die on one side of the induction block and along the axial direction of the sealing valve core, and the stroke of the fixed valve body is monitored through the micro switches.

[0024] By adopting the above technical solution, the induction block is arranged on the connecting block, and the induction block cooperates with the two groups of micro switches to improve the stability of the stroke signal.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the concave arc surface on the air extraction notch in the present application, the air extraction volume is increased, the air extraction efficiency is improved, and the forming effect of the product is improved; 2. The overall structure of this application is simple, the concentricity between the sealed valve core and the fixed valve body is relatively ideal, and it is convenient to disassemble and assemble; 3. The cooperation mode between the overflow connection block and the fixed valve body of this application is simple, ensuring concentricity and sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the vacuum valve assembly of the embodiment of this application installed on the moving mold.

[0027] Figure 2 is a schematic structural diagram of the vacuum valve assembly of the embodiment of this application.

[0028] Figure 3 is a schematic cross-sectional view of the sealed valve core in the first working position of the embodiment of this application.

[0029] Figure 4 is Figure 3 a partial enlarged schematic view of part A in

[0030] Figure 5 is a schematic structural diagram of the sealed valve core of the embodiment of this application.

[0031] Figure 6 is a schematic cross-sectional view of the sealed valve core in the second working position of the embodiment of this application.

[0032] Figure 7 is a schematic structural diagram of the installation component of the embodiment of this application.

[0033] Figure 8 is a schematic structural diagram of the overflow structure of the embodiment of this application.

[0034] Figure 9 is a schematic cross-sectional view of the annular arrangement groove of the embodiment of this application.

[0035] Description of the reference numerals: 1, moving die; 11, mounting component; 111, mounting block; 1111, mounting groove; 112, guiding block; 2, vacuum valve assembly; 3, fixed valve body; 31, sealing chamber; 32, limiting chamber; 33, limiting block; 34, radial fixing member; 341, fixing member; 342, locking spring; 343, fixed ball head; 35, radial groove; 36, sealing ring groove; 37, reset elastic member; 38, connecting portion; 39, annular arrangement groove; 391, annular sealing ring; 4, vacuum valve; 5, sealing valve core; 51, sliding portion; 52, sealing portion; 521, air extraction notch; 5211, concave arc surface; 522, inner groove; 523, pressing groove; 53, limiting portion; 531, sealing abutting surface; 532, fixing surface; 6, overflow connecting block; 61, conveying channel; 611, conveying sink; 6111, first groove body; 6112, second groove body; 62, overflow channel; 621, collecting sink; 622, ejecting through hole; 63, mounting jack; 7, sliding driving member; 71, connecting block; 711, connecting groove; 72, sensing block; 721, sensing portion; 73, micro switch. Detailed implementation manners

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the disclosed embodiments of the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the gravity direction. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0037] The following is further described in detail with reference to the attached Figure 1-9 drawings to further illustrate the present application.

[0038] An embodiment of the present application discloses a die-casting mold for an electric drive housing.

[0039] Referring to Figure 1 and Figure 2 , a die-casting mold for an electric drive housing includes a moving die 1, a fixed die (not marked in the figure), and a vacuum valve assembly 2 provided on the moving die 1. The cavity formed by the moving die 1 and the fixed die communicates with the vacuum valve assembly 2, and the air in the cavity is extracted through the vacuum valve assembly 2 to improve the product forming quality.

[0040] The vacuum valve assembly 2 includes a fixed valve body 3, a vacuum valve 4, a sealing valve core 5, and an overflow connection block 6. The fixed valve body 3 is integrally in the shape of a cylindrical tube, and it has a sealing chamber 31 and a limiting chamber 32 in sequence along the axial direction inside. The sealing chamber 31 is located at one end of the fixed valve body 3 close to the cavity, and the end of the sealing chamber 31 penetrates through the side wall of the fixed valve body 3. The vacuum valve 4 is fixedly installed on the top of the fixed valve body 3, and its output end communicates with the sealing chamber 31.

[0041] Referring to Figure 3 and Figure 4 , the sealing valve core 5 is slidably installed in the fixed valve body 3, and it includes a sliding part 51, a sealing part 52, and a limiting part 53. The sliding part 51 is located in the sealing chamber 31, and its outer diameter is smaller than the inner diameter of the sealing chamber 31. The limiting part 53 is located in the limiting chamber 32, and both ends thereof have sealing abutting surfaces 531 that seal and abut against the inner wall of the limiting chamber 32. A limiting block 33 corresponding to the limiting chamber 32 is provided on the fixed valve body 3, and the limiting block 33 is arranged between the two sealing abutting surfaces 531, and the axial displacement distance of the sealing valve core 5 is limited by the limiting block 33.

[0042] On the side of the fixed valve body 3 away from the sealing part 52 of the limiting block 33, a radial fixing member 34 is further provided. The radial fixing member 34 includes a fixing member 341, a locking spring 342, and a fixed ball head 343. A radial groove 35 for arranging the radial fixing member 34 is formed in the fixed valve body 3 in the radial direction, and the radial groove 35 communicates with the limiting chamber 32. The limiting part 53 has a fixing surface 532 against which the fixed ball head 343 always abuts. The outer diameter of the fixing surface 532 is smaller than that of the sealing abutting surface 531.

[0043] The sealing part 52 is located at the end of the sliding part 51. The outer diameter of the sealing part 52 is larger than that of the sliding part 51, and a sealing ring groove 36 is provided at the opening of the sealing chamber 31 of the fixed valve body 3, and the sealing ring groove 36 is in sealing cooperation with the sealing part 52.

[0044] Referring to Figure 5 , an air extraction notch 521 is provided on the outer side wall of the sealing part 52, and one end of the air extraction notch 521 penetrates through the side wall of the sealing part 52 facing the sliding part 51. In this embodiment, two groups of air extraction notches 521 are provided on the sealing part 52, and the two groups of air extraction notches 521 are symmetrically arranged along the axis of the sealing part 52. The air extraction notch 521 has a concave arc surface 5211 on the side facing the axis of the sealing part 52, which can improve the air extraction volume in the same time and improve the air extraction efficiency compared with the horizontal plane. Among them, an inner groove 522 is further provided at the end of the sealing part 52 to improve the pushing effect of the molten aluminum on the sealing valve core 5.

[0045] Referring to Figure 3 and Figure 6, the sliding of the sealing valve core 5 on the fixed valve body 3 enables the sealing valve core 5 to have a first working position and a second working position. When the sealing valve core 5 is in the first working position, the whole sealing part 52 is located outside the sealing valve body, the air extraction notch 521 and the sealing ring groove 36 are staggered, and the fixed valve body 3 and the cavity are communicated through the air extraction notch 521, and the sealing chamber 31 and the cavity are communicated with each other; The vacuum valve 4 is started, and the air in the cavity is extracted to form a negative pressure. The sealing valve core 5 slides into the fixed valve body 3 under the pushing action of the melt. When the air extraction notch 521 corresponds to the sealing ring groove 36, the sealing head seals and abuts against the sealing ring groove 36, and the fixed valve body 3 and the cavity are isolated from each other. At this time, the sealing valve core 5 is in the second working position.

[0046] In order to realize the automatic reset of the sealing valve core 5, a reset elastic member 37 is further arranged in the fixed valve core. In this embodiment, the reset elastic member 37 is a rectangular spring, and its two ends respectively abut against the limiting portion 53 and the inner wall of the limiting chamber 32, so that after the air pressure in the cavity is restored, the sealing valve core 5 automatically resets to the first working position under the action of the reset elastic member 37.

[0047] Refer to Figure 7 , an installation assembly 11 for installing the fixed valve body 3 is installed on the moving mold 1. The installation assembly 11 includes an installation block 111 and a guide block 112. The top of the installation block 111 is provided with an installation groove body 1111 for arranging the fixed valve body 3, and the width of the installation groove body 1111 is greater than the outer diameter of the fixed valve body 3. The guide block 112 is fixed to the opposite sides of the installation groove body 1111 by bolts, and the fixed valve body 3 is located between the two guide blocks 112.

[0048] The fixed valve body 3 further has a connection portion 38 at one end far from the sealing portion 52. A sliding driving member 7 for connecting and positioning is fixedly installed on the installation block 111. The fixed valve body 3 is slid back and forth through the sliding driving member 7 so that the sealing valve core 5 is disengaged from the second groove body 6112. In this embodiment, the sliding driving member 7 is an oil cylinder member, and a connecting block 71 is arranged between the output end of the sliding driving member 7 and the connection portion 38. Connection grooves 711 for clamping and cooperating with the connection portion 38 and the sliding driving member 7 are arranged on the opposite sides of the connecting block 71.

[0049] An induction block 72 is bolted to the top of the connecting block 71. Two groups of micro switches 73 are arranged at intervals along the sliding direction of the fixed valve body 3 on the top of the guide block 112. An induction portion 721 for abutting and cooperating with the micro switch 73 is arranged on the side wall of the induction block 72, and guide inclined surfaces are arranged on the opposite sides of the induction portion 721 so that when the induction block 72 moves, it abuts against the two micro switches 73 in sequence.

[0050] Refer to Figure 6 and Figure 8, the overflow connection block 6 is arranged at one end of the installation component 11 close to the cavity. The overflow connection blocks 6 are installed on both the moving die 1 and the fixed die. A communication pipeline connecting the cavities is formed between the two overflow connection blocks 6, and the communication pipeline includes a conveying channel 61 and an overflow channel 62. The overflow connection block 6 has an installation jack 63 for installing the fixed valve body 3.

[0051] The conveying channel 61 is a straight channel, and its two ends correspond to the cavity and the inner groove 522 respectively. A conveying sink 611 for arranging the sealing part 52 is arranged on one side of the conveying channel 61 close to the fixed valve body 3, and the conveying sink 611 is a stepped groove. The stepped groove is successively a first groove body 6111 and a second groove body 6112 along the axis of the sealing valve core 5. The inner diameter of the first groove body 6111 is smaller than that of the second groove body 6112. When the sealing valve core 5 is in the first position, the outer wall of the sealing part 52 abuts against the inner wall of the first groove body 6111. When the sealing valve core 5 is in the second position, the sealing part 52 corresponds to the second groove body 6112.

[0052] The overflow channel 62 is a bent channel. Two groups of overflow channels 62 are arranged on both opposite sides of the conveying channel 61. The ends of the two groups of overflow channels 62 far from the conveying channel 61 have a collecting sink 621. The depth of the collecting sink 621 is greater than that of the overflow channel 62. Among them, the overflow connection block 6 is provided with ejector through holes 622 on the bottom walls of the conveying channel 61 and the overflow channel 62, and ejector rods connecting to the ejector rod mechanism are arranged at the ejector through holes 622 to push the aluminum liquid solidified in the communication pipeline.

[0053] Referring to Figure 9 , in other embodiments, in order to improve the sealing effect, the fixed valve body 3 is provided with an annular arrangement groove 39 on the inner wall of the sealing ring groove 36, and an annular sealing ring 391 is installed in the annular arrangement groove 39. The inner diameter of the annular sealing ring 391 is smaller than the inner diameter of the sealing ring groove 36. The outer side wall of the sealing part 52 has a pressing groove 523 for cooperating with the annular sealing ring 391.

[0054] The implementation principle of the die-casting mold for an electric drive housing in this application embodiment is as follows: The sealing valve core 5 is in the first position under normal conditions. When die-casting the product, the air in the cavity is extracted through the vacuum valve 4, and the cavity is in a negative pressure state. The aluminum liquid in the cavity is conveyed to the overflow connection block 6. The aluminum liquid is first conveyed along the conveying channel 61, pushing the sealing valve core 5 to slide into the fixed valve body 3. When the sealing valve core 5 moves to the second position, the cavity and the sealing chamber 31 are isolated; After the mold is demolded, the sliding driving part 7 is started to drive the fixed valve body 3 to move, so that the fixed valve body 3 and the sealing valve core 5 are separated from the conveying sink 611, facilitating the ejector rod mechanism to eject the aluminum liquid block solidified in the conveying channel 61. After the aluminum liquid block is ejected, the sealing valve core 5 is reset to the first position under the action of the reset elastic part 37 to prepare for the next operation.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A die-casting mold for an electric drive housing, characterized in that, It includes a moving mold (1), a stationary mold, and a vacuum valve assembly (2) provided on the moving mold (1). The vacuum valve assembly (2) includes a fixed valve body (3), a vacuum valve (4) communicating with the inner cavity of the fixed valve body (3), and a sealing valve core (5) slidably mounted on the fixed valve body (3). An air extraction notch (521) communicating with the fixed valve body (3) is provided at the end of the sealing valve core (5), and the fixed valve body (3) is provided with a sealing ring groove (36) for the sealing valve core (5) to seal against. The sealing valve core (5) has a first working position and a second working position. When the sealing valve core (5) is in the first working position, the air extraction notch (521) and the sealing ring groove (36) are staggered, and the fixed valve body (3) is communicated with the cavity through the air extraction notch (521). When the vacuum valve (4) is started, the sealing valve core (5) slides into the fixed valve body (3) under the pushing action of the melt. When the air extraction notch (521) and the sealing ring groove (36) correspond, the sealing valve core (5) is in the second working position, and at this time, the fixed valve body (3) and the cavity are sealed and isolated.

2. The die-casting mold for an electric drive housing according to claim 1, characterized in that, The sealing valve core (5) includes a sliding part (51) located in the fixed valve body (3) and a sealing part (52) provided at one end of the sliding part (51). The air extraction notch (521) is provided on the outer side wall of the sealing part (52), and the outer diameter of the sealing part (52) is greater than or equal to that of the sliding part (51), and the sealing ring groove (36) is sealingly adapted to the sealing part (52).

3. The die-casting mold for an electric drive housing according to claim 2, characterized in that, A limiting part (53) is provided at the other end of the sealing valve core (5). The fixed valve body (3) is provided with a sealing chamber (31) for arranging the sliding part (51) and a limiting chamber (32) for sealingly arranging the limiting part (53). The sealing chamber (31) corresponds to the vacuum valve (4), and the fixed valve body (3) is provided with a limiting block (33) for axially limiting the limiting part (53) in the limiting chamber (32).

4. A die-casting mold for an electric drive housing according to claim 2, characterized in that, The air extraction notch (521) is symmetrically arranged along the axis of the sealing part (52), and the air extraction notch (521) has a concave arc surface (5211) on the side facing the axis of the sealing part (52).

5. The die-casting mold for an electric drive housing according to claim 4, characterized in that, An inner groove (522) for the aluminum liquid to push is provided at the end of the sealing part (52).

6. The die-casting mold for an electric drive housing according to claim 2, characterized in that, The fixed valve body (3) is provided with an annular arrangement groove (39) in the sealing ring groove (36), and an annular sealing ring (391) is provided in the annular arrangement groove (39). The inner diameter of the annular sealing ring (391) is smaller than the inner diameter of the sealing ring groove (36), and a pressing groove (523) for cooperating with the annular sealing ring (391) is provided on the outer side wall of the sealing part (52).

7. A die-casting mold for an electric drive housing according to claim 3, characterized in that, The vacuum valve assembly (2) further includes an overflow connection block (6) communicating the cavity and the fixed valve body (3). The overflow connection block (6) is provided with an installation jack (63) for the fixed valve body (3) to be inserted, and the overflow connection block (6) is provided with a communication pipeline communicating with the cavity.

8. A die-casting mold for an electric drive housing according to claim 7, characterized in that, The connecting pipeline includes a conveying channel (61) and an overflow channel (62). The two ends of the conveying channel (61) are communicated with the cavity and the inner groove (522). One end of the conveying channel (61) is provided with a conveying sink (611) for arranging the sealing part (52). The axial length of the conveying sink (611) is greater than the moving distance of the limiting part (53). The overflow channels (62) are arranged at intervals on the opposite sides of the conveying channel (61).

9. A die-casting mold for an electric drive housing according to claim 2, characterized in that, The fixed valve body (3) is provided with a connecting part (38) at one end far from the sealing part (52). The fixed valve body (3) is provided with a sliding driving part (7) at one end far from the cavity. A connecting block (71) is arranged between the sliding driving part (7) and the connecting part (38).

10. The die-casting mold for an electric drive housing according to claim 9, characterized in that, Both opposite sides of the connecting block (71) are provided with connecting grooves (711) for the connecting part (38) and the sliding driving part (7) to be fixedly matched. An induction block (72) is further arranged at the top of the connecting block (71). Two groups of microswitches (73) are arranged on the moving mold (1) on one side of the induction block (72) and along the axial direction of the sealing valve core (5). The stroke of the fixed valve body (3) is monitored through the microswitches (73).

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