Middle connecting plate of transmission, transmission and vehicle

Abstract

The utility model relates to a middle connecting plate of a transmission, the transmission and a vehicle, and the middle connecting plate comprises a middle connecting plate body which is provided with a first shaft through hole and a second shaft bearing mounting hole; the first valve plate and the middle connecting plate body are integrally formed, the first valve plate is provided with a first surface, a plurality of oil cavities are formed in the first surface, and the first valve plate is in surface-to-surface fit with the second valve plate. The first valve plate is integrated on the middle connecting plate body, so that the integration level can be improved, and the lengths of the middle connecting plate and the second valve plate in the thickness direction can be shortened; an oil cavity is adopted to replace a slender oil duct, the oil cavity is small in depth, large in size area, better in castability than the oil duct and good in product casting quality, the first valve plate and the second valve plate are matched in a face-to-face mode, the leakage risk is reduced, the number of the oil ducts in the middle connecting plate body is reduced, and the space occupied by auxiliary holes and a plugging structure and the number of plugging parts can be reduced; the overall dimension of the middle connecting plate is reduced, product cost is reduced, and reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, concretely relates to a middle connecting plate of transmission, transmission and vehicle. BACKGROUND

[0002] With the development of new energy vehicles, the electric drive system also develops rapidly, and higher demands are put forward for the platformization and cost of the electric drive assembly. In order to adapt to the development of the industry and improve the competitiveness, the design of the electric drive assembly develops towards low cost, integration, miniaturization and platformization.

[0003] The middle connecting plate of the hybrid transmission includes a middle connecting plate body, which is provided with an input shaft bearing seat hole, a drive motor shaft bearing seat hole and an intermediate shaft bearing seat hole; the middle connecting plate body is also provided with independent clutch pressure oil channels, clutch lubricating oil channels, drive motor shaft lubricating oil channels, electronic oil pump oil inlet channels, electronic oil pump oil outlet channels, oil cooler oil channels and cooling oil pipe oil channels. The middle connecting plate only integrates bearing seat holes and oil channels, and the integration degree is low. SUMMARY

[0004] One of the purposes of the utility model is to provide a middle connecting plate of transmission to solve the problem that the integration degree is small because the bearing seat holes and oil channels are integrated on the middle connecting plate in the prior art; the second purpose is to provide a transmission; and the third purpose is to provide a vehicle.

[0005] In order to achieve the above-mentioned purposes, the utility model adopts the following technical scheme:

[0006] A middle connecting plate of transmission includes: a middle connecting plate body having a first shaft through hole and a second shaft bearing mounting hole, the first shaft through hole penetrates the middle connecting plate body along the thickness direction of the middle connecting plate body, the first shaft through hole is used for the first shaft to pass through, and the second shaft bearing mounting hole is used for mounting the second shaft bearing; a first valve plate is integrally formed with the middle connecting plate body, the first valve plate has a first surface, a plurality of oil cavities are formed in the first surface, the first valve plate is used for surface cooperation with a second valve plate, and the first valve plate and the second valve plate form a hydraulic valve plate.

[0007] According to the above technical means, the first valve plate of the hydraulic valve plate is integrated on the middle connecting plate body, the integration degree can be improved, the length of the middle connecting plate and the second valve plate in the thickness direction can be shortened after the middle connecting plate and the second valve plate cooperate, the first surface of the first valve plate has a plurality of oil cavities, the oil cavities are used instead of the slender oil channels, the depth of the oil cavities is relatively shallow and the size area is relatively large, the castability is better than that of the oil channels, the product casting quality is good, the first valve plate and the second valve plate are surface cooperation, the number of oil channels on the middle connecting plate body is reduced, the space occupied by the process hole, the plugging structure for plugging the process hole and the number of plugging parts can be reduced, the profile size of the middle connecting plate is reduced and the product cost is reduced, and the assembly leakage point is reduced, and the reliability is improved.

[0008] Further, the first side of the middle connecting plate body is provided with an inwardly recessed and annular clutch piston mounting cavity coaxially arranged with the first shaft through hole, the first side of the middle connecting plate body and the first surface of the first valve plate are located on the same side, the clutch piston mounting cavity is provided with a clutch pressure oil passage oil outlet, the plurality of oil chambers include a clutch pressure oil chamber, the middle connecting plate body is provided with a clutch pressure oil passage, one end of the clutch pressure oil passage communicates with the clutch pressure oil chamber, and the other end of the clutch pressure oil passage communicates with the clutch pressure oil passage oil outlet.

[0009] According to the above technical means, the clutch piston is mounted in the clutch piston mounting cavity, that is, the clutch piston mounting cavity is directly integrated on the middle connecting plate, which can shorten the length of the assembly formed by the middle connecting plate and the clutch assembly in the axial direction, and the integration of the first valve plate and the clutch piston mounting cavity shortens the oil passage stroke, improves the response speed and response time of the clutch assembly.

[0010] Further, the first valve plate has a middle connecting plate oil pump outlet hole penetrating through the first valve plate in the thickness direction and communicating with the middle connecting plate body, the middle connecting plate oil pump outlet hole is used for communicating with the oil outlet of the oil pump, and the middle connecting plate oil pump outlet hole communicates with at least part of the plurality of oil chambers.

[0011] According to the above technical means, the middle connecting plate oil pump outlet hole is directly machined on the first valve plate, avoiding an elongated oil passage, improving the integration degree of the system, and being conducive to reducing the overall volume, especially suitable for a transmission or powertrain system with limited space. The hydraulic valve plate formed by the first valve plate and the second valve plate is a core component of the hydraulic control system, and connects multiple oil chambers through one oil outlet hole, which is convenient for unified management and on-demand distribution of hydraulic oil. In addition, the high-pressure oil of the oil outlet of the oil pump is directly delivered to each related oil chamber through the middle connecting plate oil pump outlet hole, the path is short and the resistance is small, the pressure loss is reduced, the control instruction can be quickly responded, and the dynamic performance and response speed of the hydraulic system are improved.

[0012] Further, the middle connecting plate body is provided with an oil suction filter oil pipe mounting hole, the oil suction filter oil pipe mounting hole is arranged close to the middle connecting plate oil pump outlet hole, the oil suction filter oil pipe mounting hole and the middle connecting plate oil pump outlet hole are arranged close to the input shaft of the transmission, and the oil suction filter oil pipe mounting hole is used for communicating with the right box body oil pump inlet.

[0013] According to the above technical means, the oil suction filter oil pipe mounting hole is located below the first valve plate, the middle connecting plate oil pump outlet hole is located above the oil suction filter oil pipe mounting hole, and the positions of the oil suction filter oil pipe mounting hole and the middle connecting plate oil pump outlet hole are as close to the center of the input shaft of the transmission as possible, so that the position of the oil pump mounting hole is as much as possible to be retracted inward, thereby reducing the radial dimension of the electric drive assembly.

[0014] Further, the oil cavity includes an oil pipe inlet cavity, the first valve plate further has a cooling oil channel and an oil pipe mounting hole, one end of the cooling oil channel is communicated with the oil pipe inlet cavity, the other end of the cooling oil channel is communicated with the oil pipe mounting hole, and the oil pipe mounting hole is used for mounting a cooling oil pipe.

[0015] According to the above technical means, the middle connecting plate oil pump outlet hole is communicated with the oil pipe inlet cavity, hydraulic oil flows out of the oil pump outlet, flows into the middle connecting plate oil pump outlet hole of the first valve plate, then flows into the oil pipe inlet cavity, and then flows into the cooling oil channel, and finally flows into the cooling oil pipe through the oil pipe mounting hole, so that the gear is cooled and lubricated, the friction between the gears can be effectively reduced, and wear is reduced; and the heat on the gear can be taken away by the hydraulic oil, the gear is cooled and cooled, and the service life of the mechanical part is prolonged.

[0016] Further, the first side of the middle connecting plate body is provided with an oil collecting rib plate, and the hole wall of the second shaft bearing mounting hole is provided with an opening, and the oil collecting rib plate is used for guiding the hydraulic oil into the second shaft bearing mounting hole through the opening.

[0017] According to the above technical means, the hydraulic oil is guided to flow into the opening through the oil collecting rib plate, and then flows into the second shaft bearing mounting hole to lubricate the bearing, reduce friction resistance, prevent dry wear damage, and good lubrication can significantly reduce wear and heat generation during bearing operation, thereby prolonging the service life of the bearing and improving the operation reliability of the equipment.

[0018] Further, the middle connecting plate further includes an electromagnetic shielding structure, and the electromagnetic shielding structure includes a shielding cover covering the three-phase conductive row, and the shielding cover is integrally formed with the edge of the middle connecting plate body.

[0019] According to the above technical means, the electromagnetic shielding structure is arranged at the outlet of the three-phase conductive row, the internal and external magnetic fields are separated, electromagnetic interference between electrical parts is avoided, electromagnetic shielding effect is improved, and the problem of electromagnetic interference between electrical elements after high integration of the electric drive assembly is solved.

[0020] Further, the shielding cover includes a first shielding plate, a second shielding plate and a third shielding plate, the first side of the first shielding plate is provided with the second shielding plate, the side of the second shielding plate away from the first shielding plate is provided with the third shielding plate, and the side of the third shielding plate away from the second shielding plate is used for being attached to the shielding rib plate of the right box body.

[0021] According to the above technical means, through the combination of the three shielding plates, the three-phase copper row can be wrapped and protected from multiple directions, so that the electromagnetic interference can be effectively blocked from multiple angles, and the electromagnetic compatibility is improved.

[0022] Further, the electromagnetic shielding structure includes a plurality of shielding ribs extending in the radial direction of the middle connecting plate, the plurality of shielding ribs are arranged on the second side of the middle connecting plate body, and the plurality of shielding ribs are located on both sides of the outlet position of the three-phase conductive row.

[0023] According to the technical scheme, a plurality of shielding ribs are arranged near the outgoing line of the three-phase copper bar on the side where the tank cover is located, three shielding plates and a plurality of shielding ribs are arranged near the conductive bar, and a wrapping structure is formed, so that the electromagnetic shielding effect is better.

[0024] A transmission comprises the intermediate connecting plate, a second valve plate assembled on the first valve plate of the intermediate connecting plate, an oil suction filter fixed on the second valve plate, a right tank fixed with the intermediate connecting plate, the right tank having an oil pump mounting hole, a right tank oil pump oil inlet and a right tank oil pump oil outlet, the right tank and the second valve plate being located on both sides of the intermediate connecting plate, and an oil pump partially mounted in the oil pump mounting hole, the oil suction port of the oil pump being communicated with the right tank oil pump oil inlet, and the oil outlet of the oil pump being communicated with the right tank oil pump oil outlet.

[0025] According to the technical scheme, the oil outlet pipe of the oil suction filter is mounted in the oil suction filter oil pipe mounting hole, the oil outlet hole of the oil suction filter oil outlet pipe is communicated with the right tank oil pump oil inlet through the oil suction filter oil pipe mounting hole, and the oil pump is deeply buried in the oil pump mounting hole of the right tank, so that the radial dimension of the whole structure is greatly reduced, and the overall layout is more compact.

[0026] Further, an oil inlet cavity communicated with the right tank oil pump oil inlet and the oil suction port of the oil pump is formed between the oil pump mounting hole and the oil pump, the hydraulic oil in the oil inlet cavity is used for cooling the oil pump, the oil pump has an oil outlet end face, the oil outlet end face is provided with an oil outlet, and the oil outlet end face is attached to the bottom wall of the oil pump mounting hole.

[0027] According to the technical scheme, the hydraulic oil in the oil inlet cavity is not only used for oil supply, but also used for cooling the oil pump, the heat generated during the flow of the oil liquid can be taken away, local overheating is avoided, and the working reliability is improved. The oil outlet end face is tightly attached to the bottom wall of the oil pump mounting hole, good sealing performance can be achieved, high-pressure oil leakage is avoided, and the system safety and service life are improved.

[0028] Further, the transmission further comprises a first shaft, the first shaft is a clutch shaft, the clutch shaft has a gap with the first shaft through hole, the clutch shaft has an inner hole, the hole wall of the inner hole is provided with a clutch oil outlet hole penetrating to the outer wall of the clutch shaft, the clutch oil outlet hole is communicated with the gap, and the inner hole, the clutch oil outlet hole and the gap form a clutch lubricating oil path.

[0029] According to the above technical means, after the lubricating oil flows into the inner hole of the clutch shaft, the oil is sprayed out through the clutch oil outlet holes into the gap formed between the intermediate connecting plate and the clutch shaft, and the oil is distributed in different gap differences between the first shaft passing holes and the clutch shaft and the positions of the clutch oil outlet holes, so that the clutch bearing and the clutch assembly are cooled and lubricated respectively, which can effectively reduce the friction between the clutch shaft, the bearing and the clutch piston and the clutch body, and reduce the wear; and the hydraulic oil can take away the heat on the clutch bearing, the clutch shaft and the clutch assembly, so as to cool and heat the clutch bearing, the clutch shaft and the clutch assembly, and prolong the service life of the mechanical parts.

[0030] A vehicle comprising the transmission described above.

[0031] The utility model discloses beneficial effects:

[0032] Part of the valve plate oil way of the hydraulic valve plate is integrated on the lower left corner of the intermediate connecting plate, which can reduce the oil way hole on the intermediate connecting plate, shorten the axial length of the intermediate connecting plate and the hydraulic valve plate, improve the integration degree, reduce the plugging process hole and leakage point, reduce the cost and improve the reliability. Integrating the clutch piston installation cavity on the intermediate connecting plate can shorten the axial length of the assembly, and integrating the first valve plate and the clutch piston installation cavity can shorten the clutch pressure oil way stroke and improve the clutch response speed; the intermediate connecting plate oil pump oil outlet hole and the oil suction filter oil pipe mounting hole of the oil pump are arranged close to the axis of the input shaft of the transmission, so that the oil pump installation position is inwardly retracted, the radial dimension is reduced, the electric drive assembly is integrated and miniaturized, and more vehicle platforms can be matched. The shielding plate and the shielding rib are arranged on the intermediate connecting plate to improve the electromagnetic shielding effect and solve the electromagnetic interference problem between electrical elements after the electric drive assembly is highly integrated. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a structure schematic view of the front of the intermediate connecting plate of the utility model;

[0034] Figure 2 It is Figure 1 It is a partial structure schematic view of the back of the intermediate connecting plate shown in the figure;

[0035] Figure 3 It is Figure 1 It is a structure schematic view of the intermediate connecting plate, the right box body and the three-phase conductive row shown in the figure;

[0036] Figure 4 It is Figure 1 It is a partial structure schematic view of the intermediate connecting plate, the oil pump, the right box body and the oil suction filter shown in the figure;

[0037] Figure 5 It is Figure 1 It is a partial structure schematic view of the intermediate connecting plate, the second valve plate, the oil pump and the oil suction filter shown in the figure;

[0038] Figure 6 For Figure 1 Figure 2 is a partial cross-sectional view of the middle connecting plate, clutch shaft and clutch assembly.

[0039] 1. middle connecting plate; 11. middle connecting plate body; 111. round corner; 112. reinforcing rib; 12. first valve plate; 121. middle connecting plate oil pump oil outlet hole; 122. clutch pressure oil cavity; 123. clutch pressure oil channel; 124. oil pipe oil inlet cavity; 125. cooling oil channel; 126. oil pipe mounting hole; 13. clutch piston mounting cavity; 131. clutch pressure oil channel oil outlet; 14. second shaft bearing mounting hole; 141. opening; 15. first shaft through hole; 16. oil suction filter oil pipe mounting hole; 17. electromagnetic shielding structure; 171. shielding cover; 1711. first shielding plate; 1712. second shielding plate; 1713. third shielding plate; 1714. flange; 1715. joint surface; 173. shielding rib; 18. oil collecting rib plate;

[0040] 2. right case; 21. shielding rib plate; 22. right case oil pump oil inlet; 23. oil pump mounting hole; 231. oil inlet cavity; 24. right case oil pump oil outlet;

[0041] 3. oil pump; 31. oil inlet cavity sealing ring; 32. oil outlet end surface;

[0042] 4. second valve plate;

[0043] 5. oil suction filter; 51. oil suction filter oil outlet pipe;

[0044] 6. clutch assembly; 61. clutch piston; 62. clutch body;

[0045] 7. cooling oil pipe;

[0046] 8. clutch shaft; 81. clutch oil outlet hole;

[0047] 9. clutch bearing;

[0048] 10. three-phase conductive row. DETAILED DESCRIPTION

[0049] The implementation manner of the present application will be described below with reference to the drawings and preferred embodiments, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure in the present specification. The present application can also be implemented or applied in other different specific embodiments, and each detail in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, but not for limiting the protection scope of the present application.

[0050] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0051] This embodiment proposes a connecting plate 1, which is part of the transmission, such as... Figures 1 to 6 As shown, the connecting plate 1 includes: a connecting plate body 11 and a first valve plate 12. The connecting plate body 11 has a first shaft through hole 15 and a second shaft bearing mounting hole 14. The first shaft through hole 15 penetrates the connecting plate body 11 along the thickness direction and is used for the passage of the first shaft. The second shaft bearing mounting hole 14 is used for mounting the second shaft bearing. The first valve plate 12 is integrally formed with the connecting plate body 11. The first valve plate 12 has a first surface and several inwardly recessed oil cavities are formed on the first surface. The first valve plate 12 is used to cooperate with the second valve plate 4. The first valve plate 12 and the second valve plate 4 form a hydraulic valve plate.

[0052] By utilizing the technical solution of this embodiment, the first valve plate 12 of the hydraulic valve plate is integrated on the middle connecting plate body 11, which can improve the integration. After the middle connecting plate 1 and the second valve plate 4 are matched, the length of the middle connecting plate 1 and the second valve plate 4 in the thickness direction can be shortened. Furthermore, the first surface of the first valve plate 12 has several oil cavities. The oil cavities replace the slender oil channels. The oil cavities are shallower and have a larger size and area, and their castability is better than that of oil channels, resulting in better product casting quality. The first valve plate 12 and the second valve plate 4 are matched face to face, which reduces the number of oil channels on the middle connecting plate body 11. This reduces the space occupied by the process holes and the number of sealing parts, thereby reducing the outline size of the middle connecting plate 1 and the product cost. At the same time, it reduces its assembly leakage points and improves reliability.

[0053] It should be noted that the thickness direction of the middle connecting plate body 11 also refers to the axial direction of the first shaft through hole 15 or the second shaft bearing mounting hole 14.

[0054] Furthermore, such as Figure 1 and Figure 6As shown, the first shaft passing hole 15 is used for the first shaft to pass through, the first shaft is the clutch shaft 8, the second shaft bearing mounting hole 14 is used for mounting the second shaft bearing, the second shaft is one shaft of the transmission, the clutch shaft 8 is arranged in the first shaft passing hole 15 and has a gap between the first shaft passing hole 15, the clutch shaft 8 has an inner hole, a plurality of clutch oil outlet holes 81 are arranged on the hole wall of the inner hole and penetrate to the outer wall of the clutch shaft 8, and the inner hole, the clutch oil outlet holes 81 and the gap form a clutch lubricating oil path. One end of the first shaft passing hole 15 is mounted with the clutch bearing 9, the clutch assembly 6 includes the clutch body 62 and the clutch piston 61, the clutch body 62 and the clutch bearing 9 are mounted on the clutch shaft 8 and located on both sides of the clutch oil outlet hole 81.

[0055] After the lubricating oil flows into the inner hole of the clutch shaft 8, the oil is sprayed out through the plurality of clutch oil outlet holes 81 into the gap formed between the intermediate connecting plate 1 and the clutch shaft 8, and the different gap differences formed between the first shaft passing hole 15 and the clutch shaft 8 and the position of the clutch oil outlet hole 81 are used for oil distribution, and the clutch bearing 9 and the clutch assembly 6 are cooled and lubricated respectively, which can effectively reduce the friction between the clutch shaft 8 and the bearing and the clutch piston 61 and the clutch body 62, and reduce the wear; and the hydraulic oil can take away the heat on the clutch bearing 9, the clutch shaft 8 and the clutch assembly 6, and cool and heat dissipate the clutch bearing 9, the clutch shaft 8 and the clutch assembly 6, thereby prolonging the service life of the mechanical parts.

[0056] In the embodiment, as shown in Figure 1 , Figure 5 and Figure 6 , the first side of the intermediate connecting plate body 11 is provided with a clutch piston mounting cavity 13 which is recessed inward and annular, the clutch piston mounting cavity 13 is coaxially arranged with the first shaft passing hole 15, the first side of the intermediate connecting plate body 11 and the first surface of the first valve plate 12 are located on the same side, the clutch piston mounting cavity 13 is provided with a clutch pressure oil channel oil outlet 131, a plurality of oil cavities include a clutch pressure oil cavity 122, the intermediate connecting plate body 11 is provided with a clutch pressure oil channel 123, one end of the clutch pressure oil channel 123 communicates with the clutch pressure oil cavity 122, and the other end of the clutch pressure oil channel 123 communicates with the clutch pressure oil channel oil outlet 131. The clutch assembly 6 includes the clutch body 62 and the clutch piston 61, in order to improve the integration and reduce the overall axial size, the clutch piston 61 is mounted in the clutch piston mounting cavity 13, that is, the clutch piston mounting cavity 13 is directly integrated on the intermediate connecting plate 1, which can shorten the length of the assembly formed by the intermediate connecting plate 1 and the clutch assembly 6 in the axial direction, and the integration of the first valve plate 12 and the clutch piston mounting cavity 13 shortens the oil path stroke, improves the response speed and response time of the clutch assembly.

[0057] Further, the hydraulic oil in the clutch pressure oil cavity 122 flows into the clutch pressure oil gallery 123, flows into the clutch piston installation cavity 13 through the clutch pressure oil gallery oil outlet 131, and then pushes the clutch piston 61 to move towards the clutch body 62, thereby controlling the clutch engagement.

[0058] Further, the clutch pressure oil cavity 122 is vertically through the clutch pressure oil gallery 123. The vertical through design can reduce the length and bending of the oil way, so that the hydraulic oil can flow from the oil cavity to the oil gallery or from the oil gallery to the oil cavity more quickly, which can accelerate the speed of clutch engagement or disengagement and improve the response efficiency of the whole system.

[0059] In the embodiment, as shown in Figure 1 and Figure 4 , the first valve plate 12 has a middle connecting plate oil pump oil outlet hole 121 which is vertically through the first valve plate 12 in the thickness direction and is in communication with the middle connecting plate body 11. The middle connecting plate oil pump oil outlet hole 121 is used to communicate with the oil outlet of the oil pump 3, the clutch pressure oil cavity 122, and at least part of the oil cavities. The middle connecting plate oil pump oil outlet hole 121 is directly machined on the first valve plate, avoiding the long and slender oil way, improving the integration degree of the system, and being conducive to reducing the overall volume, especially suitable for the transmission or powertrain system with limited space. The hydraulic valve plate formed by the first valve plate and the second valve plate is the core component of the hydraulic control system, which connects multiple oil cavities through one oil outlet hole, is convenient for unified management and on-demand distribution of hydraulic oil, and the high-pressure oil of the oil pump outlet is directly delivered to each related oil cavity through the middle connecting plate oil pump oil outlet hole 121, which has a short path and small resistance, reduces the pressure loss, can quickly respond to the control instruction, and improves the dynamic performance and response speed of the hydraulic system.

[0060] Specifically, the middle connecting plate oil pump oil outlet hole 121 is in communication with the clutch pressure oil cavity 122. The hydraulic oil flows out of the oil outlet of the oil pump 3, flows into the middle connecting plate oil pump oil outlet hole 121 of the first valve plate 12, then flows into the clutch pressure oil cavity 122 and the clutch pressure oil gallery 123, and finally flows into the clutch piston installation cavity 13 through the clutch pressure oil gallery oil outlet 131, thereby controlling the movement of the clutch piston 61 to control the clutch engagement.

[0061] In the embodiment, as shown in Figure 1 , Figure 4 and Figure 5 , the middle connecting plate body 11 is provided with an oil suction filter oil pipe mounting hole 16 which is arranged close to the middle connecting plate oil pump oil outlet hole 121. The oil suction filter oil pipe mounting hole 16 and the middle connecting plate oil pump oil outlet hole 121 are arranged close to the input shaft of the transmission, and the oil suction filter oil pipe mounting hole 16 is used to communicate with the right box body oil pump inlet 22. In Figure 1In the embodiment, the oil filter oil pipe mounting hole 16 is located below the first valve plate, the middle connecting plate oil pump oil outlet hole 121 is located above the oil filter oil pipe mounting hole 16, and the positions of the oil filter oil pipe mounting hole 16 and the middle connecting plate oil pump oil outlet hole 121 are as close to the center of the input shaft of the transmission as possible, so that the position of the oil pump mounting hole 23 is as close to the inside as possible, thereby reducing the radial dimension of the electric drive assembly.

[0062] In the embodiment, the oil cavities include an oil pipe oil inlet cavity 124, the first valve plate 12 further has a cooling oil channel 125 and an oil pipe mounting hole 126, one end of the cooling oil channel 125 communicates with the oil pipe oil inlet cavity 124, the other end of the cooling oil channel 125 communicates with the oil pipe mounting hole 126, and the oil pipe mounting hole 126 is used for mounting the cooling oil pipe 7. The middle connecting plate oil pump oil outlet hole 121 communicates with the oil pipe oil inlet cavity 124, the hydraulic oil flows out of the oil outlet of the oil pump 3, flows into the middle connecting plate oil pump oil outlet hole 121 of the first valve plate 12, then flows into the oil pipe oil inlet cavity 124, then flows into the cooling oil channel 125, and finally flows into the cooling oil pipe 7 from the oil pipe mounting hole 126, so as to cool and lubricate the gears, which can effectively reduce the friction between the gears and reduce the wear; and the hydraulic oil can take away the heat on the gears, cool and heat dissipate the gears, and prolong the service life of the mechanical parts.

[0063] Further, the oil pipe oil inlet cavity 124 vertically penetrates the cooling oil channel 125, the vertical penetration design can reduce the length and bending of the oil circuit, so that the hydraulic oil can flow from the oil cavity to the oil channel more quickly, and the response efficiency of the whole system is improved.

[0064] In the embodiment, the first valve plate further has a plurality of oil circuits, the middle connecting plate oil pump oil outlet hole 121 communicates with the corresponding oil cavity through the corresponding oil circuit, and the oil circuit is arranged to facilitate the communication between the middle connecting plate oil pump oil outlet hole 121 and the oil cavity. It should be noted that the oil circuit and the oil cavity need to be set according to specific needs, and are not limited thereto.

[0065] In the embodiment, as shown in Figure 1 , the first side of the middle connecting plate body 11 is provided with an oil collecting rib plate 18, and the hole wall of the second shaft bearing mounting hole 14 is provided with an opening 141, and the oil collecting rib plate 18 is used to guide the hydraulic oil into the second shaft bearing mounting hole 14 through the opening 141. The oil collecting rib plate 18 is located above the second shaft bearing mounting hole 14, and the hydraulic oil is guided to flow into the opening 141 through the oil collecting rib plate 18, and then flows into the second shaft bearing mounting hole 14 to lubricate the bearing, reduce the friction resistance, and prevent dry wear damage. Good lubrication can significantly reduce the wear and heat generation of the bearing during operation, thereby prolonging the service life of the bearing and improving the operation reliability of the equipment.

[0066] In the embodiment, as shown in Figure 1 , Figure 2 , and Figure 3As shown, the middle connecting plate 1 further comprises an electromagnetic shielding structure 17, which comprises a shielding cover 171 accommodating the three-phase conductive row 10, and the shielding cover 171 is integrally formed with the edge of the middle connecting plate body 11. The electromagnetic shielding structure 17 is arranged at the outlet of the three-phase conductive row 10, separates the internal and external magnetic fields, avoids electromagnetic interference between electrical components, improves the electromagnetic shielding effect, and solves the problem of electromagnetic interference between electrical components after the high integration of the electric drive assembly.

[0067] In this embodiment, the shielding cover 171 comprises a first shielding plate 1711, a second shielding plate 1712, and a third shielding plate 1713. The first side of the first shielding plate 1711 is provided with the second shielding plate 1712. The side of the second shielding plate 1712 away from the first shielding plate 1711 is provided with the third shielding plate 1713. The side of the third shielding plate 1713 away from the second shielding plate 1712 is used to be attached to the shielding rib plate 21 of the right box body 2. The three-phase conductive row 10 is specifically a three-phase copper row. Through the combination of the three shielding plates, the three-phase copper row can be wrapped and protected from multiple directions, ensuring that electromagnetic interference can be effectively blocked from multiple angles and improving electromagnetic compatibility.

[0068] Further, the side of the third shielding plate 1713 forms a joint surface 1715 that is attached to the shielding rib plate 21 of the right box body 2. This can ensure that there is no gap or only a very small gap at the joint of the shielding cover 171, thereby more effectively blocking electromagnetic interference and avoiding mutual influence of internal and external electromagnetic fields.

[0069] In this embodiment, the electromagnetic shielding structure 17 comprises a plurality of shielding ribs 173 extending in the radial direction of the middle connecting plate 1. The plurality of shielding ribs 173 are arranged on the second side of the middle connecting plate body 11 and are located on both sides of the outlet position of the three-phase conductive row 10. On the side where the joint surface 1715 is located, a plurality of shielding ribs 173 are arranged near the outlet of the three-phase copper row. Three shielding plates and a plurality of shielding ribs 173 are arranged near the conductive row, thereby forming a wrapping structure, and the electromagnetic shielding effect is better.

[0070] Further, a flange 1714 is arranged at the edge of the shielding cover 171 to enhance the structural strength of the shielding cover 171, thereby improving the structural stability of the middle connecting plate 1.

[0071] In this embodiment, as shown in Figure 1 The first side of the middle connecting plate body 11 is provided with a step from the inside to the outside along the thickness direction thereof. A round corner 111 is arranged at the connection of the step. The step is smoothly transitioned through the round corner, and a reinforcing rib 112 is arranged at the position of the plane of the step, thereby improving the structural strength of the middle connecting plate 1 and further enhancing the mechanical stability of the middle connecting plate 1.

[0072] This embodiment also proposes a transmission, as shown in Figures 1 to 6As shown, it comprises the above-mentioned middle web plate 1, the second valve plate 4, the oil suction filter 5, the right box body 2 and the oil pump 3. The second valve plate 4 is assembled on the first valve plate 12 of the middle web plate 1; the oil suction filter 5 is fixed on the second valve plate 4; the right box body 2 is fixed with the middle web plate 1, and the right box body 2 has an oil pump mounting hole 23, a right box body oil pump oil inlet 22 and a right box body oil pump oil outlet 24, and the right box body 2 and the second valve plate 4 are located on both sides of the middle web plate 1; part of the oil pump 3 is mounted in the oil pump mounting hole 23, the oil suction port of the oil pump 3 communicates with the right box body oil pump oil inlet 22, and the oil outlet of the oil pump 3 communicates with the right box body oil pump oil outlet 24. The oil suction filter oil outlet pipe 51 is mounted in the oil suction filter oil pipe mounting hole 16, the oil outlet hole of the oil suction filter oil outlet pipe 51 communicates with the right box body oil pump oil inlet 22 through the oil suction filter oil pipe mounting hole 16, and the oil pump 3 is deeply buried in the oil pump mounting hole 23 of the right box body 2, which greatly reduces the radial size of the whole structure and makes the overall layout more compact.

[0073] Further, the oil inlet of the oil suction filter 5 communicates with the inner cavity of the gearbox, which can realize direct extraction of lubricating oil from the inside of the gearbox for filtration, ensure the cleanliness of the oil entering the system, and effectively remove impurities and particulate matter.

[0074] In this embodiment, as shown in Figure 1 , Figure 4 and Figure 5 , an oil inlet cavity 231 is formed between the oil pump mounting hole 23 and the oil pump 3, which communicates the right box body oil pump oil inlet 22 and the oil suction port of the oil pump 3, and the hydraulic oil in the oil inlet cavity 231 can cool the oil pump 3. The oil pump 3 has an oil outlet end face 32, the oil outlet end face 32 is provided with an oil outlet, and the oil outlet end face 32 is tightly attached to the bottom wall of the oil pump mounting hole 23. The hydraulic oil in the oil inlet cavity 231 is not only used for oil supply, but also plays a cooling role for the oil pump 3. During the flow of the oil, the heat generated by the operation of the oil pump can be removed, avoiding local overheating and improving the working reliability. The oil outlet end face 32 is tightly attached to the bottom wall of the oil pump mounting hole 23, which can achieve good sealing performance, avoid high-pressure oil leakage, and improve the stability of the system.

[0075] Specifically, when the oil pump 3 is working, the hydraulic oil in the gearbox flows into the oil suction filter 5 through the oil inlet of the oil suction filter 5, and after being filtered by the oil suction filter 5, the hydraulic oil flows out from the oil outlet hole of the oil suction filter oil outlet pipe 51, flows into the oil inlet cavity 231 through the oil suction filter oil pipe mounting hole 16 and the right box body oil pump oil inlet 22, and the oil inlet cavity 231 is filled with oil, which can cool the oil pump 3; after the oil suction port of the oil pump 3 sucks the hydraulic oil in the oil inlet cavity 231 into the inside, the hydraulic oil is pushed to the oil outlet along with the movement of the rotating parts (such as gears, vanes or plungers) of the oil pump 3, and then flows out of the oil pump 3 through the right box body oil pump oil outlet 24, the middle web plate oil pump outlet hole 121 and finally flows into the hydraulic valve plate, which is finally distributed to each oil circuit through the hydraulic valve plate.

[0076] Further, the oil pump 3 is sleeved with an oil inlet cavity sealing ring 31, the side wall of the oil pump mounting hole 23, the oil inlet cavity sealing ring 31, the bottom wall of the oil pump mounting hole 23 and the outer wall of the oil pump 3 form an oil inlet cavity 231, the oil outlet end face 32 and the bottom wall of the oil pump mounting hole 23 are sealed by the sealing ring, which avoids leakage of oil and ensures normal operation of the system.

[0077] Specifically, the oil pump 3 is fixed on the right box body 2 by bolts, which can provide a firm and reliable connection, ensure that the oil pump 3 remains stable during operation, and reduce displacement or looseness caused by vibration or impact.

[0078] In the related art, the oil channel of the middle connecting plate needs to be cored and machined, which increases the manufacturing difficulty of the middle connecting plate, and the integration degree of the integrated oil channel hole is small, and the size of the part can still be reduced; the plugging of each process hole of the oil channel needs to increase the parts, which increases the cost and the risk of leakage; the connection of the oil channel hole increases the oil path, which affects the response speed of the hydraulic control system; and the middle connecting plate has no electromagnetic shielding structure, which has electromagnetic interference risk.

[0079] To reduce the overall size and reduce the number of oil channels, in this embodiment, part of the hydraulic valve plate oil circuit is integrated on the lower left corner of the middle connecting plate 1, which can reduce the oil circuit hole on the middle connecting plate 1, shorten the axial length of the middle connecting plate 1 and the hydraulic valve plate, improve the integration degree, reduce the plugging process hole and leakage point, reduce the cost and improve the reliability. Integrating the clutch piston installation cavity 13 on the middle connecting plate 1 will shorten the overall assembly axial length, and integrating the first valve plate 12 and the clutch piston installation cavity 13 shortens the clutch pressure oil channel 123 stroke, improving the clutch response speed; The middle connecting plate oil pump oil outlet hole 121 and the oil filter oil pipe mounting hole 16 of the oil pump 3 are arranged close to the axis of the input shaft of the transmission, so that the oil pump 3 installation position is inward, the radial size is reduced, the electric drive assembly is integrated and miniaturized, and more vehicle platforms are matched. The shielding plate and shielding rib 173 are arranged on the middle connecting plate 1 to improve the electromagnetic shielding effect, so as to solve the problem of electromagnetic interference between electrical elements after the electric drive assembly is highly integrated.

[0080] It should be noted that the hydraulic valve plate and the hydraulic valve installed on the hydraulic valve plate form a hydraulic control module, which controls the flow direction and pressure of the hydraulic oil through the hydraulic control module.

[0081] The embodiment also provides a vehicle comprising the transmission.

[0082] Further, the vehicle is specifically a hybrid vehicle, and the transmission is specifically a hybrid transmission. It can be understood that the transmission can also be applied to a fuel vehicle or a pure electric vehicle.

[0083] The above examples are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or transformations made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A connecting plate for a transmission, characterized in that, include: The connecting plate body (11) has a first shaft through hole (15) and a second shaft bearing mounting hole (14). The first shaft through hole (15) penetrates the connecting plate body (11) along the thickness direction. The first shaft through hole (15) is used for the passage of the first shaft, and the second shaft bearing mounting hole (14) is used for mounting the second shaft bearing. The first valve plate (12) is integrally formed with the connecting plate body (11). The first valve plate (12) has a first surface. Several inwardly recessed oil cavities are formed on the first surface. The first valve plate (12) is used to cooperate with the second valve plate (4). The first valve plate (12) and the second valve plate (4) form a hydraulic valve plate.

2. The connecting plate according to claim 1, characterized in that, The first side of the connecting plate body (11) is provided with an inwardly recessed and annular clutch piston mounting cavity (13). The clutch piston mounting cavity (13) is coaxially arranged with the first shaft through hole (15). The first side of the connecting plate body (11) and the first surface of the first valve plate (12) are located on the same side. The clutch piston mounting cavity (13) is provided with a clutch pressure oil passage outlet (131). The plurality of oil chambers include a clutch pressure oil chamber (122). The connecting plate body (11) is provided with a clutch pressure oil passage (123). One end of the clutch pressure oil passage (123) is connected to the clutch pressure oil chamber (122), and the other end of the clutch pressure oil passage (123) is connected to the clutch pressure oil passage outlet (131).

3. The connecting plate according to claim 1, characterized in that, The first valve plate (12) has a middle connecting plate oil pump outlet hole (121) that extends through the first valve plate (12) in its thickness direction and communicates with the middle connecting plate body (11). The middle connecting plate oil pump outlet hole (121) is used to communicate with the oil outlet of the oil pump (3). The middle connecting plate oil pump outlet hole (121) is communicated with at least a portion of the plurality of oil chambers.

4. The connecting plate according to claim 3, characterized in that, The connecting plate body (11) is provided with an oil suction filter pipe mounting hole (16). The oil suction filter pipe mounting hole (16) is located near the oil pump outlet hole (121) of the connecting plate. The oil suction filter pipe mounting hole (16) and the oil pump outlet hole (121) of the connecting plate are located near the input shaft of the transmission. The oil suction filter pipe mounting hole (16) is used to communicate with the oil pump inlet (22) of the right housing.

5. The connecting plate according to any one of claims 1 to 4, characterized in that, The oil chambers include an oil pipe inlet chamber (124), and the first valve plate (12) also has a cooling oil passage (125) and an oil pipe mounting hole (126). One end of the cooling oil passage (125) is connected to the oil pipe inlet chamber (124), and the other end of the cooling oil passage (125) is connected to the oil pipe mounting hole (126). The oil pipe mounting hole (126) is used to install the cooling oil pipe (7).

6. The connecting plate according to any one of claims 1 to 4, characterized in that, The first side of the connecting plate body (11) is provided with an oil collecting rib plate (18), and the hole wall of the second shaft bearing mounting hole (14) is provided with an opening (141). The oil collecting rib plate (18) is used to guide hydraulic oil into the second shaft bearing mounting hole (14) through the opening (141).

7. The connecting plate according to claim 1, characterized in that, The connecting plate (1) further includes an electromagnetic shielding structure (17), which includes a shielding cover (171) covering the three-phase busbar (10), and the shielding cover (171) is integrally formed with the edge of the connecting plate body (11).

8. The connecting plate according to claim 7, characterized in that, The shielding cover (171) includes a first shielding plate (1711), a second shielding plate (1712) and a third shielding plate (1713). The first shielding plate (1711) has a second shielding plate (1712) on its first side. The third shielding plate (1713) is provided on the side of the second shielding plate (1712) away from the first shielding plate (1711). The side of the third shielding plate (1713) away from the second shielding plate (1712) is used to fit against the shielding rib plate (21) of the right box (2).

9. The connecting plate according to claim 7, characterized in that, The electromagnetic shielding structure (17) includes a plurality of shielding ribs (173) extending in the radial direction of the connecting plate (1). The plurality of shielding ribs (173) are disposed on the second side of the connecting plate body (11) and are located on both sides of the outlet position of the three-phase busbar (10).

10. A transmission, characterized in that, include: The connecting plate (1) according to any one of claims 1 to 9; The second valve plate (4) is assembled on the first valve plate (12) of the connecting plate (1); An oil suction filter (5) is fixed on the second valve plate (4); The right housing (2) is fixed to the middle connecting plate (1). The right housing (2) has an oil pump mounting hole (23), a right housing oil pump inlet (22) and a right housing oil pump outlet (24). The right housing (2) and the second valve plate (4) are located on both sides of the middle connecting plate (1). The oil pump (3) is partially installed in the oil pump mounting hole (23). The oil suction port of the oil pump (3) is connected to the oil inlet (22) of the right housing oil pump, and the oil outlet of the oil pump (3) is connected to the oil outlet (24) of the right housing oil pump.

11. The transmission according to claim 10, characterized in that, The oil pump mounting hole (23) and the oil pump (3) form an oil inlet chamber (231) that connects the oil pump inlet (22) of the right housing and the oil suction port of the oil pump (3). The hydraulic oil in the oil inlet chamber (231) is used to cool the oil pump (3). The oil pump (3) has an oil outlet end face (32) with an oil outlet. The oil outlet end face (32) is in contact with the bottom wall of the oil pump mounting hole (23).

12. The transmission according to claim 10, characterized in that, The transmission also includes a first shaft, which is a clutch shaft (8). The clutch shaft (8) passes through the first shaft through hole (15) and has a gap between it and the first shaft through hole (15). The clutch shaft (8) has an inner hole, and a plurality of clutch oil outlet holes (81) extending through to the outer wall of the clutch shaft (8) are provided on the wall of the inner hole. The clutch oil outlet holes (81) communicate with the gap. The inner hole, the clutch oil outlet holes (81) and the gap form a clutch lubrication oil passage.

13. A vehicle, characterized in that, Includes the transmission as described in any one of claims 10 to 12.

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