Power takeoff supporting shell with split type oil duct

Abstract

The invention discloses a power takeoff supporting shell containing a split type oil duct, belongs to a power takeoff supporting shell, and solves the problems that in an existing power takeoff supporting shell, an oil way is formed in the shell, machining of the oil way in the shell through a conventional lathe and a numerical control machine tool becomes very difficult, and the machining cost is low. The hydraulic power takeoff supporting structure comprises a right power takeoff supporting shell, a left power takeoff supporting shell and a supporting seat, oil channels are formed in the surface of the right power takeoff supporting shell and the surface of the left power takeoff supporting shell, and the process difficulty is reduced by reasonably arranging the oil channels.

Description

Technical Field

[0001] This invention pertains to power take-off (PTO) support housings, specifically relating to a PTO support housing with a split-type oil passage. Background Art

[0002] Currently, most hydraulic automatic transmissions contain multiple functional components, such as clutches, lock-up clutches, transmission systems, and torque converter pump impellers. Consequently, the internal design of the support housing that provides the oil passages for these components has become extremely complex. This leads to the problem of manufacturability of the oil passages within the housing. Since the oil passages are contained inside the housing, it becomes very difficult to machine the internal oil passages using conventional lathes and CNC machine tools, resulting in increased production costs for hydraulic automatic transmissions. Therefore, how to rationally arrange the oil passages has become a primary issue that needs to be addressed during the development of hydraulic transmissions.

[0003] Chinese patent CN117432766A discloses a rear end cover housing structure for a hydraulic transmission system, including a rear end cover housing, a machined oil passage structure, and a cast oil passage structure. The rear end cover housing has an output shaft bearing hole and an intermediate shaft bearing hole. A power take-off (PTO) interface is provided on one side of the output shaft bearing hole. The machined oil passage structure connects to the intermediate shaft bearing hole. Structural strength reinforcing ribs are provided around both the output shaft bearing hole and the intermediate shaft bearing hole. The cast oil passage structure connects to the output shaft bearing hole. An output shaft bearing cover housing is installed on the outside of the output shaft bearing hole, and an intermediate shaft bearing cover housing is installed on the outside of the intermediate shaft bearing hole. This patent reduces the overall weight of the transmission system. The oil passages on each separate housing structure are designed with a "short, shallow, and straight" opening method, but this limits the functionality of the oil passages.

[0004] Chinese patent CN221075130U discloses a torque converter housing with a highly integrated hydraulic valve plate, including a turbine pump guide three-element mounting cavity. This cavity is located on the front housing of the torque converter, which connects to the rear housing. The front and rear housings can be machined separately and then assembled, reducing machining difficulty and improving production efficiency. It also facilitates oil-fluid separation between the front and rear housings. The rear housing has a hydraulic control module, a pump shaft hole, a lock-up clutch oil passage, an output shaft hole, and at least one power take-off (PTO) mounting hole. The hydraulic control module connects the oil circuits on the housing to the outside, enabling control of these circuits. The pump shaft hole accommodates the pump's power output shaft, the output shaft hole accommodates the turbine's output shaft, and the PTO mounting hole accommodates the PTO's output shaft. The torque converter housing has a high degree of integration, which reduces the weight of the torque converter; however, this patent is used to solve the control problem of the oil circuit inside the torque converter housing, but it cannot solve the problem of the difficulty in the oil circuit manufacturing process, which leads to the increase in the production cost of the hydraulic automatic transmission. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that in existing support housings, the oil passages are located inside the housing, making it very difficult to machine the oil passages inside the housing using conventional lathes and CNC machine tools, which in turn increases the production cost of hydraulic automatic transmissions. The invention provides a power take-off support housing with split oil passages.

[0006] The inventive concept of this invention is to rationally arrange the oil circuit and optimize the shell structure. In view of the complex design of the oil passage inside the power take-off support shell and the high difficulty of the oil passage opening process, a split combined oil passage is developed. Structurally, it mainly includes a right power take-off support shell, a left power take-off support shell and a support base, each with its own oil passage. The oil passages of the right power take-off support shell and the left power take-off support shell are opened on the surface, which reduces the difficulty of the process.

[0007] To achieve the above objectives and complete the above-mentioned inventive concept, the present invention adopts the following technical solution:

[0008] A power take-off support housing with a split oil passage is characterized in that it includes a right power take-off support housing, a left power take-off support housing, and a support base.

[0009] The right power take-off support housing and support base are both coaxially provided with drive gear holes. The outer wall of one end of the support base is sleeved with the left power take-off support housing. The side of the left power take-off support housing away from the support base is attached to the side of the right power take-off support housing. Both the right power take-off support housing and the left power take-off support housing are provided with coaxial driven gear holes.

[0010] The surface of the right power take-off support housing has n oil passages a along the periphery of the drive gear hole, and this surface is the side that fits the left power take-off support housing, where n≥3;

[0011] The left power take-off support housing has n oil inlet holes, each oil inlet hole corresponding to one end of an oil passage a;

[0012] The surface of the left power take-off support housing has n oil passages b along the periphery of the drive gear hole of the support seat. One end of each oil passage b corresponds to the other end of an oil passage a, and the other end of each oil passage b extends to the connection with the support seat.

[0013] An oil passage c is opened at the other end of each oil passage b in the support seat;

[0014] The n oil inlet holes are connected to the n oil channels a, b, and c, respectively, forming n oil inlet channels.

[0015] In this invention, the support housing is divided into three parts, wherein the oil passages of the right power take-off support housing and the left power take-off support housing are opened on the surface, which reduces the difficulty of the process; the number of oil passages is set according to the function of the hydraulic automatic transmission.

[0016] Furthermore, when n=5, the oil passages within the right power take-off support housing, the left power take-off support housing, and the support base are specifically as follows:

[0017] The right power take-off support housing surface is provided with a first oil passage a, a second oil passage a, a third oil passage a, a fourth oil passage a, and a fifth oil passage a along the periphery of the drive gear hole;

[0018] The left power take-off support housing has a first oil inlet, a second oil inlet, a third oil inlet, a fourth oil inlet, and a fifth oil inlet. On the surface of the left power take-off support housing near the right power take-off support housing, a first oil passage b, a second oil passage b, a third oil passage b, a fourth oil passage b, and a fifth oil passage b are respectively formed along the periphery of the drive gear hole, extending to the connection point with the support base. The first oil inlet, the second oil inlet, the third oil inlet, the fourth oil inlet, and the fifth oil inlet correspond to one end of the first oil passage a, the second oil passage a, the third oil passage a, the fourth oil passage a, and the fifth oil passage a, respectively. One end of the first oil passage b, the second oil passage b, the third oil passage b, the fourth oil passage b, and the fifth oil passage b correspond to the other end of the first oil passage a, the second oil passage a, the third oil passage a, the fourth oil passage a, and the fifth oil passage a, respectively.

[0019] The support base is provided with a first oil passage c, a second oil passage c, a third oil passage c, a fourth oil passage c, and a fifth oil passage c, respectively, corresponding to the first oil passage b, the second oil passage b, the third oil passage b, the fourth oil passage c, and the fifth oil passage b.

[0020] The first oil inlet hole, the first oil passage a, the first oil passage b and the first oil passage c are connected in sequence to form the main lubricating oil inlet channel;

[0021] The second oil inlet, the second oil passage a, the second oil passage b and the second oil passage c are connected in sequence to form the clutch control oil circuit inlet channel;

[0022] The third oil inlet, third oil passage a, third oil passage b and third oil passage c are connected in sequence to form the oil inlet channel of the lock-up clutch control oil circuit.

[0023] The fourth oil inlet, fourth oil passage a, fourth oil passage b and fourth oil passage c are connected in sequence to form the torque converter pump wheel oil inlet channel.

[0024] The fifth oil inlet, fifth oil passage a, fifth oil passage b, and fifth oil passage c are connected in sequence to form the oil inlet channel of the pump wheel support seat.

[0025] Furthermore, a pressure relief valve is provided on the left power take-off support housing, which is connected to the fourth oil passage b, thereby stabilizing the oil pressure inside the torque converter.

[0026] Furthermore, the first oil passage c, the second oil passage c, the third oil passage c, the fourth oil passage c, and the fifth oil passage c within the support are all cast oil passages, further overcoming the problem of machining difficulties for complex oil passages.

[0027] Furthermore, on the other side of the right power take-off support housing and the left power take-off support housing, near the positions of the driving gear hole and the driven gear hole, multiple triangular reinforcing ribs are uniformly arranged axially to enhance the strength of the right power take-off support housing and the left power take-off support housing.

[0028] Furthermore, the outer wall of the other end of the support is fitted with the inner ring of the tapered roller bearing, and the outer wall of the outer ring of the tapered roller bearing is used to fit the drive gear of the power take-off.

[0029] The outer ring of a rolling bearing is connected inside the driven gear hole of the left power take-off support housing. The inner ring of the rolling bearing is connected to the driven gear of the power take-off via a threaded shaft. The pressure relief port of the pressure relief valve corresponds to the meshing point of the driven gear and the driving gear of the power take-off.

[0030] Furthermore, the end of the threaded shaft away from the driven gear of the power take-off passes through a rolling bearing and is connected to a locking nut. A locking washer is fitted over the locking nut, and the driven gear is locked by the locking nut, while the locking washer is used to fix the locking nut.

[0031] Furthermore, the outer ring of a cylindrical roller bearing is connected inside the drive gear hole of the right power take-off support housing, and the inner ring of the cylindrical roller bearing is used to connect the input shaft for conveying / outputting functional oil.

[0032] Furthermore, an O-ring is provided at the connection between the support base and the left power take-off support housing to increase the sealing performance of the oil passage.

[0033] Furthermore, the right power take-off support housing and the left power take-off support housing are connected by multiple bolts to increase the stability of the overall structure; the support base is positioned and connected to the left power take-off support housing by a cylindrical pin.

[0034] The beneficial effects of this invention are:

[0035] 1. This invention provides a power take-off (PTO) support housing with split-type oil channels. It rationally arranges the oil circuits and develops a split-type combined oil channel. Structurally, it mainly includes a right PTO support housing, a left PTO support housing, and a support base, each with its own oil channels. The oil channels of the right and left PTO support housings are located on their surfaces, reducing manufacturing complexity. Disassembling the two housings allows for clear observation of the oil circuit layout and facilitates cleaning of the oil channels.

[0036] 2. In the power take-off support housing with split oil channels of the present invention, multiple oil channels are opened on the surface of the right power take-off support housing and the left power take-off support housing. The thickness requirements of the two housings are not high, which can reduce the overall weight.

[0037] 3. In the power take-off support housing with split oil channels of the present invention, the oil channels in the support base are all cast oil channels, which further overcomes the problem of machining difficulties of complex oil channels.

[0038] 4. In the power take-off support housing with split oil passage of the present invention, the right power take-off support housing and the left power take-off support housing are both connected with multiple triangular reinforcing ribs along the circumference near the positions of the driving gear hole and the driven gear hole, which improves the strength of the support housing and ensures the safety of the power take-off transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is an external view of Embodiment 1 of the power take-off support housing with a split oil passage according to the present invention;

[0040] Figure 2 This is a cross-sectional view of Embodiment 1 of the power take-off support housing with a split oil passage according to the present invention;

[0041] Figure 3 This is a schematic diagram of the right power take-off support housing in Embodiment 1 of the present invention, which is a power take-off support housing with a split oil passage.

[0042] Figure 4 This is a schematic diagram of the structure of the left power take-off support housing away from the right power take-off support housing in Embodiment 1 of the present invention, which includes a split oil passage;

[0043] Figure 5 This is a schematic diagram of the structure of the left power take-off support housing connected to the right power take-off support housing in Embodiment 1 of the present invention, which includes a split oil passage.

[0044] Figure 6 This is a cross-sectional view of the support base in Embodiment 1 of the power take-off support housing with split oil passages according to the present invention;

[0045] Figure 7This is another cross-sectional view of the support base in Embodiment 1 of the power take-off support housing with split oil passages of the present invention;

[0046] Figure 8 This is a cross-sectional view of the input shaft in Embodiment 1 of the power take-off support housing with a split oil passage according to the present invention;

[0047] Figure 9 This is a cross-sectional view of a second embodiment of the power take-off support housing with a split oil passage according to the present invention.

[0048] In the diagram, 1-right PTO support housing, 2-left PTO support housing, 3-support base, 4-input shaft, 5-O-ring seal, 6-PTO drive gear, 7-PTO driven gear, 8-locking washer, 9-lock nut, 10-tapered roller bearing, 11-cylindrical roller bearing, 12-pressure relief valve, 13-drive gear bore, 14-input shaft locking clutch oil passage, 15-cylindrical pin, 16-pressure relief valve bore, 17-driven gear bore, 18-first oil inlet, 19-second oil inlet, 20-third oil inlet 21-Fourth oil inlet, 22-Fifth oil inlet, 23-Input shaft main lubrication oil passage, 24-Input shaft clutch control oil passage, 25-First oil passage a, 26-Second oil passage a, 27-Third oil passage a, 28-Fourth oil passage a, 29-Fifth oil passage a, 30-First oil passage b, 31-Second oil passage b, 32-Third oil passage b, 33-Fourth oil passage b, 34-Fifth oil passage b, 35-First oil passage c, 36-Second oil passage c, 37-Third oil passage c, 38-Fourth oil passage c, 39-Fifth oil passage c. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] This embodiment provides a power take-off (PTO) support housing with split oil passages. Five oil passages are required between the torque converter and clutch in the transmission: a main lubricating oil inlet passage, a clutch control oil passage, a lock-up clutch control oil passage, a torque converter pump wheel inlet passage, and a support seat pump wheel inlet passage. Therefore, this embodiment provides a PTO support housing with split oil passages, such as... Figure 1 As shown, it includes a right power take-off support housing 1, a left power take-off support housing 2, and a support base 3.

[0052] like Figure 2As shown, the right power take-off support housing 1 and support base 3 are both coaxially provided with drive gear holes 13. The outer wall of one end of the support base 3 is sleeved with the left power take-off support housing 2 through a cylindrical pin 15, which can play a positioning role for the support base 3. The outer wall of the other end is sleeved with the inner ring of the tapered roller bearing 10. The outer wall of the outer ring of the tapered roller bearing 10 is sleeved with the drive gear 6 of the power take-off, which provides radial support and axial positioning for the drive gear 6 of the power take-off through the tapered roller bearing 10.

[0053] The side of the left power take-off support housing 2 facing away from the support base 3 is attached to the side of the right power take-off support housing 1 by bolts. Both the right power take-off support housing 1 and the left power take-off support housing 2 have coaxial driven gear holes 17. The outer ring of the rolling bearing is connected inside the driven gear hole 17 of the left power take-off support housing 2. The inner ring of the rolling bearing is connected to the power take-off driven gear 7 through a threaded shaft. The power take-off driven gear 7 meshes with the power take-off driving gear 6.

[0054] The end of the threaded shaft away from the driven gear 7 of the power take-off passes through the rolling bearing and is connected to the locking nut 9. The locking nut 9 is fitted with a locking washer 8, which can start and fix the driven gear 7 of the power take-off.

[0055] On the other side of the right power take-off support housing 1 and the left power take-off support housing 2, near the positions of the drive gear hole and the driven gear hole, there are multiple triangular reinforcing ribs connected around the circumference to enhance the strength of the right power take-off support housing 1 and the left power take-off support housing 2.

[0056] like Figure 3 As shown, the right power take-off support housing 1 has five oil passages a on the surface facing the left power take-off support housing 2 along the periphery of the drive gear hole 13: first oil passage a25, second oil passage a26, third oil passage a27, fourth oil passage a28 and fifth oil passage a29.

[0057] like Figure 4 As shown, five oil inlet holes are opened on one end of the left power take-off support housing 2 corresponding to an oil passage a: first oil inlet hole 18, second oil inlet hole 19, third oil inlet hole 20, fourth oil inlet hole 21, and fifth oil inlet hole 22.

[0058] like Figure 5 As shown, the surface of the left power take-off support housing 2 corresponds to the other end of an oil passage a, and five oil passages b are opened along the periphery of the drive gear hole 13 of the support base 3: the first oil passage b30, the second oil passage b31, the third oil passage b32, the fourth oil passage b33 and the fifth oil passage b34; the other end of the five oil passages b extends to the connection with the support base 3.

[0059] like Figure 6 、 Figure 7As shown, five oil passages c are cast inside the support base 3 relative to the first oil passage b30, the second oil passage b31, the third oil passage b32, the fourth oil passage b33, and the fifth oil passage b34: the first oil passage c35, the second oil passage c36, the third oil passage c37, the fourth oil passage c38, and the fifth oil passage c39. The casting method avoids the need for machining of complex oil holes.

[0060] To increase the sealing performance of the oil passage, an O-ring 5 is installed at the connection between the support base 3 and the left power take-off support housing 2.

[0061] In the aforementioned oil passage, the first oil inlet 18, the first oil passage a25, the first oil passage b30, and the first oil passage c35 are sequentially connected to form the main lubricating oil inlet channel, which is used to transport the main lubricating oil of the transmission.

[0062] The second oil inlet 19, the second oil passage a26, the second oil passage b31 and the second oil passage c36 are connected in sequence to form the clutch control oil circuit inlet channel, which is used to transport the C1 clutch control oil.

[0063] The third oil inlet 20, the third oil passage a27, the third oil passage b32 and the third oil passage c37 are connected in sequence to form the oil inlet channel of the lock-up clutch control oil circuit, which is used to transport lock-up clutch oil.

[0064] The fourth oil inlet 21, the fourth oil passage a28, the fourth oil passage b33 and the fourth oil passage c38 are connected in sequence to form the torque converter pump wheel oil inlet channel, which is used to transport torque converter pump wheel oil.

[0065] The fifth oil inlet 22, the fifth oil passage a29, the fifth oil passage b34 and the fifth oil passage c39 are connected in sequence to form the oil inlet channel of the support seat pump wheel, which is used to recover the oil used in the lock-up clutch control oil circuit.

[0066] In this embodiment, the housing is designed with five oil passages, including the main lubricating oil inlet passage, the clutch control oil circuit inlet passage, the lock-up clutch control oil circuit inlet passage, the torque converter pump wheel inlet passage, and the support seat pump wheel inlet passage. The oil passages are rationally arranged, and a split-type combined oil passage is developed. Structurally, it mainly includes a right power take-off support housing, a left power take-off support housing, and a support seat, each with its own oil passages. The oil passages of the right power take-off support housing 1 and the left power take-off support housing 2 are opened on the surface, which reduces the manufacturing difficulty. After the two housings are disassembled, the direction of the oil passages can be clearly observed, and the oil passages are easy to clean.

[0067] In addition, the oil inlet channels of the torque converter pump wheel, the oil inlet channel of the lock-up clutch control circuit, and the oil inlet channel of the clutch control circuit are high-pressure control oil circuits. When the oil passages are set on the right power take-off support housing 1, the left power take-off support housing 2, and the support base 3, the oil passage length can be shortened to shorten the response time. The other two oil passages are low-pressure control oil passages, and the oil passage length can be increased to extend the response time.

[0068] like Figure 8 As shown, the input shaft 4 of the power take-off support housing in the hydraulic automatic transmission has an input shaft lock-up clutch oil passage 14 opened inward at one end; oil ring grooves a and b are opened on the middle surface of the input shaft 4, and an input shaft main lubrication oil passage 23 communicating with oil ring groove a and an input shaft clutch control oil passage 24 communicating with oil ring groove b are opened inside the input shaft 4.

[0069] When in use, the structure of input shaft 4 is as follows: Figure 2 As shown, the input shaft 4 passes sequentially through the center of the power take-off drive gear 6, the drive gear hole 13 of the support base 3, and the inner ring of the cylindrical roller bearing 11. The outer ring of the cylindrical roller bearing 11 is connected inside the drive gear hole 13 of the right power take-off support housing 1, providing radial support and axial positioning for the input shaft 4. The input shaft locking clutch oil passage 14 is aligned and connected with the third oil passage c37, the input shaft main lubrication oil passage 23 is aligned and connected with the first oil passage c35, and the input shaft clutch control oil passage 24 is aligned and connected with the second oil passage c36. The fourth oil passage c38 is connected to the torque converter pump wheel oil input end, and the fifth oil passage c39 is aligned with the torque converter pump wheel oil output end.

[0070] The oil transmission path is as follows:

[0071] ① The main lubricating oil of the transmission enters the first oil inlet 18, the first oil passage a25, the first oil passage b30 and the first oil passage c35 in sequence, and finally passes through the main lubricating oil passage 23 of the input shaft to be transmitted to the transmission system for subsequent gear and bearing cooling and lubrication.

[0072] ②The clutch control oil enters the second oil inlet 19, the second oil passage a26, the second oil passage b31 and the second oil passage c36 in sequence, and finally is transmitted to the clutch filling port through the clutch control oil passage 24 on the input shaft to complete the clutch action control.

[0073] ③ The lock-up clutch fluid sequentially enters the third oil inlet 20, the third oil passage a27, the third oil passage b32, and the third oil passage c37, and finally flows to the front of the transmission through the input shaft lock-up clutch oil passage 14. When the torque converter increases torque to enable the vehicle to reach the target speed, in order to remove the drag loss of the torque converter, the lock-up clutch is closed to realize the direct torque transmission between the engine and the transmission. The closure of the lock-up clutch is achieved through the above-mentioned oil passage.

[0074] ④ The oil in the torque converter pump wheel enters the fourth oil inlet 21, the fourth oil passage a28, the fourth oil passage b33 and the fourth oil passage c38 in sequence, and finally flows into the torque converter pump wheel. The torque converter pump wheel is connected to the engine. The engine drives the pump wheel to rotate, and the pump wheel drives the oil inside to rotate. Through the continuous acceleration of the oil, it impacts the torque converter turbine, thereby increasing the torque.

[0075] ⑤ The torque converter pump wheel oil after impacting the torque converter turbine enters the fifth oil passage c39, the fifth oil passage b34, the fifth oil passage a29, and the fifth oil inlet 22 in sequence, completing the oil drainage and recovery of the torque converter pump wheel oil.

[0076] Example 2

[0077] Unlike Example 1, as Figure 9 As shown, to stabilize the internal oil pressure of the torque converter and prevent damage to the torque converter due to excessive pressure, a pressure relief valve hole 16 is provided on the left power take-off support housing 2 facing the fourth oil passage b33 in this embodiment. A pressure relief valve 12 is connected in the pressure relief valve hole 16, and the pressure relief valve 12 is connected to the fourth oil passage b33. When the oil pressure is greater than the set pressure, the pressure relief valve opens to release the oil pressure, thereby ensuring the stability of the downstream pressure. At the same time, since the position of the pressure relief valve 12 corresponds to the meshing point of the power take-off driven gear 7 and the power take-off driving gear 6, the sprayed oil can also play a role in lubrication and cooling of the entire gear pair.

[0078] The above description is merely a specific embodiment of the present invention and a comparison of the effects of the specific embodiments with relevant comparative examples. However, the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A power take-off support housing with a split oil passage, characterized in that: It comprises a right power take-off support housing (1), a left power take-off support housing (2) and a support seat (3); The right power take-off support housing (1) and the support seat (3) are both coaxially provided with a driving gear hole (13); the outer wall of one end of the support seat (3) is sleeved with the left power take-off support housing (2); a side of the left power take-off support housing (2) facing away from the support seat (3) is closely connected to a side of the right power take-off support housing (1); and the right power take-off support housing (1) and the left power take-off support housing (2) are both coaxially provided with a driven gear hole (17); The surface of the right power take-off support housing (1) is provided with n oil passages a along the periphery of the driving gear hole (13), and the surface is a surface that is in contact with the left power take-off support housing (2), wherein n≥3; The left power take-off support housing (2) is provided with n oil inlet holes, each of which corresponds to one end of an oil passage a; The surface of the left power take-off support housing (2) is provided with n oil passages b along the periphery of the driving gear hole (13) of the support seat (3), one end of each oil passage b corresponds to the other end of an oil passage a, and the other end of each oil passage b extends to the connection with the support seat (3); An oil passage c is provided in the support seat (3) corresponding to each oil passage b; The n oil inlet holes are respectively connected with the n oil passages a, the n oil passages b and the n oil passages c, forming n oil inlet passages.

2. A power take-off support housing with a split oil passage according to claim 1, characterized in that: When n=5, the oil passages in the right power take-off support housing (1), the left power take-off support housing (2) and the support seat (3) are specifically as follows: The surface of the right power take-off support housing (1) is provided with a first oil passage a (25), a second oil passage a (26), a third oil passage a (27), a fourth oil passage a (28) and a fifth oil passage a (29) along the periphery of the driving gear hole (13); The left power take-off support housing (2) is provided with a first oil inlet hole (18), a second oil inlet hole (19), a third oil inlet hole (20), a fourth oil inlet hole (21) and a fifth oil inlet hole (22); a first oil passage b (30), a second oil passage b (31), a third oil passage b (32), a fourth oil passage b (33) and a fifth oil passage b (34) are respectively provided on a surface of the left power take-off support housing (2) close to the right power take-off support housing (1) along the periphery of the driving gear hole (13), and extend to the connection with the support seat (3); the first oil inlet hole (18), the second oil inlet hole (19), The third oil inlet hole (20), the fourth oil inlet hole (21) and the fifth oil inlet hole (22) correspond to one end of the first oil passage a (25), the second oil passage a (26), the third oil passage a (27), the fourth oil passage a (28) and the fifth oil passage a (29) respectively, and one end of the first oil passage b (30), the second oil passage b (31), the third oil passage b (32), the fourth oil passage b (33) and the fifth oil passage b (34) correspond to the other end of the first oil passage a (25), the second oil passage a (26), the third oil passage a (27), the fourth oil passage a (28) and the fifth oil passage a (29) respectively; A first oil passage c (35), a second oil passage c (36), a third oil passage c (37), a fourth oil passage c (38) and a fifth oil passage c (39) are respectively arranged at the other end of the support seat (3) corresponding to the first oil passage b (30), the second oil passage b (31), the third oil passage b (32), the fourth oil passage b (33) and the fifth oil passage b (34); The first oil inlet hole (18), the first oil passage a (25), the first oil passage b (30) and the first oil passage c (35) are connected in sequence to form a main lubricating oil inlet passage; The second oil inlet hole (19), the second oil passage a (26), the second oil passage b (31) and the second oil passage c (36) are connected in sequence to form an oil inlet passage for the clutch control oil circuit; The third oil inlet hole (20), the third oil passage a (27), the third oil passage b (32) and the third oil passage c (37) are connected in sequence to form an oil inlet passage for the locking clutch control oil circuit; The fourth oil inlet hole (21), the fourth oil passage a (28), the fourth oil passage b (33) and the fourth oil passage c (38) are connected in sequence to form an oil inlet passage for the torque converter pump wheel; The fifth oil inlet hole (22), the fifth oil passage a (29), the fifth oil passage b (34) and the fifth oil passage c (39) are connected in sequence to form an oil inlet passage of the support seat pump wheel.

3. A power take-off support housing with a split oil passage according to claim 2, characterized in that: The left power take-off support housing (2) is provided with a pressure relief valve (12), and the pressure relief valve (12) is connected to the fourth oil passage b (33).

4. A power take-off support housing with a split oil passage according to claim 2, characterized in that: The first oil passage c (35), the second oil passage c (36), the third oil passage c (37), the fourth oil passage c (38) and the fifth oil passage c (39) in the support seat (3) are all cast oil passages.

5. A power take-off support housing with a split oil passage according to any one of claims 1 to 4, characterized in that: On the other side of the right power take-off support shell (1) and the left power take-off support shell (2), a plurality of triangular reinforcing ribs are evenly arranged along the axial direction near the driving gear hole and the driven gear hole, so as to improve the strength of the right power take-off support shell (1) and the left power take-off support shell (2).

6. A power take-off support housing with a split oil passage according to claim 3, characterized in that: The outer wall of the other end of the support seat (3) is sleeved with the inner ring of the tapered roller bearing (10), and the outer wall of the outer ring of the tapered roller bearing (10) is used to sleeve the driving gear (6) of the power take-off; The passive gear hole (17) of the left power take-off support housing (2) is connected to the outer ring of a rolling bearing, the inner ring of the rolling bearing is connected to the power take-off passive gear (7) via a threaded shaft, and the power take-off passive gear (7) meshes with the power take-off active gear (6); the pressure relief port of the pressure relief valve (12) corresponds to the meshing position of the power take-off passive gear (7) and the power take-off active gear (6).

7. A power take-off support housing with a split oil passage according to claim 6, characterized in that: One end of the threaded shaft away from the power take-off driven gear (7) passes through a rolling bearing and is connected to a locking nut (9), and a locking washer (8) is externally connected to the locking nut (9).

8. A power take-off support housing with a split oil passage according to claim 1, characterized in that: The outer ring of the cylindrical roller bearing (11) is connected to the driving gear hole of the right power take-off support housing (1).

9. A power take-off support housing with a split oil passage according to claim 1, characterized in that: An O-type sealing ring (5) is also provided at the connection position between the support seat (3) and the left power take-off support housing (2).

10. A power take-off support housing with a split oil passage according to claim 1 or 2, characterized in that: The right power take-off support housing (1) and the left power take-off support housing (2) are connected via a plurality of bolts, and the support seat (3) and the left power take-off support housing (2) are connected via a cylindrical pin (15).

Images