Transmission power takeoff assembly with shared lubricating structure

Abstract

The utility model relates to a transmission power takeoff assembly, and provides a transmission power takeoff assembly with a shared lubricating structure in order to overcome the defects that an existing power takeoff is tedious in operation and high in cost due to the fact that lubricating oil is independently injected into the existing power takeoff, or the problem that an existing lubricating system is low in lubricating efficiency. The power takeoff lubricating system comprises a right lubricating oil pipe connected with an oil pump, a power takeoff lubricating oil pipe connected with the right lubricating oil pipe, a third oil duct, a fourth oil duct, a fifth oil duct and a sixth oil duct. A first oil pipe hole is formed in the connecting position of the transmission shell and the rear cover body and located above the intermediate shaft rear bearing. A second oil pipe hole is formed in the end, away from the rear cover body, of the rear cover shell and located above the power takeoff input shaft. A power takeoff mounting hole is formed in the end, close to the power takeoff body, of the rear cover shell, and the first oil duct, the second oil duct, the third oil duct, the fourth oil duct, the fifth oil duct and the sixth oil duct communicate in sequence and are jointly used for lubricating the interior of the power takeoff body and the interior of the transmission body.

Description

Technical Field

[0001] The utility model relates to a transmission power take-off combination, in particular to a transmission power take-off combination with a common lubrication structure. Background Art

[0002] A power take-off (also known as a power output device) is usually composed of a gearbox, a clutch, and a controller, including one or more sets of speed gears, which are connected to the low-speed gear of the gearbox or the output shaft of the auxiliary box to output power to an external working device.

[0003] The commonly used power take-off is a through-shaft power take-off, and the input shaft of the power take-off is connected to the intermediate shaft of the transmission. When connected to the intermediate shaft at the top of the transmission, the position where the power take-off and the transmission are connected to each other is often higher than the lubricating oil level in the transmission, so that the lubricating oil cannot flow directly into the power take-off. The way to lubricate the power take-off is usually to add a two-way sealing oil seal at the connection between the power take-off and the transmission, and then add lubricating oil to the power take-off separately. Although this method can meet the lubrication needs of the power take-off, it has the disadvantages of cumbersome operation and high cost. Therefore, when the power take-off is matched with a transmission with forced lubrication, a new structure is needed to realize the shared lubrication of the power take-off and the transmission. Without adding external parts and changing the interface of the power take-off, it simplifies user operation and reduces operating costs while ensuring the lubrication needs of the daily use of the power take-off.

[0004] Chinese patent CN105351505A discloses a transmission lubrication system with a through-shaft power take-off, including a transmission, and a through-shaft power take-off connected to the rear cover of the transmission, wherein the input shaft of the through-shaft power take-off is connected to the intermediate shaft of the transmission; the bottom of the through-shaft power take-off is connected to the bottom of the transmission, so that the lubricating oil level inside the two is kept horizontal. The through-shaft power take-off is connected to the rear cover of the transmission, and the input shaft is connected to the intermediate shaft of the transmission through a spline; the bottom of the transmission and the bottom of the through-shaft power take-off are connected through a circulating oil pipe by using the communicating vessel principle, and the lubricating oil is pumped into the through-shaft power take-off instead of the oil outlet channel, and the transmission oil pump is used to meet the lubrication requirements of the transmission and the through-shaft power take-off at the same time, thereby eliminating the through-shaft power take-off oil pump itself. At the same time, ensuring that the liquid levels of the two are kept horizontal means lowering the height of the lubricating oil level inside the power take-off, thereby reducing the oil stirring loss of the power take-off and improving efficiency. However, the shortcomings of this patent are: it does not involve forced lubrication and has low lubrication efficiency. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the existing power take-off, which has the disadvantages of complicated operation and high cost, or the problem of low lubrication efficiency of the existing lubrication system, by providing a transmission that shares a lubrication structure with the power take-off.

[0006] To achieve the above purpose, the technical solution provided by the utility model is:

[0007] A transmission power take-off assembly with a common lubrication structure, comprising a power take-off body and a transmission body;

[0008] The transmission body includes a transmission housing, an intermediate shaft assembly arranged in the transmission housing, and a power take-off input shaft connected to the intermediate shaft; the transmission housing includes a clutch housing, a transmission housing, a rear cover body, and a rear cover housing which are connected in sequence by bolts; the power take-off body includes a power take-off housing, an input gear shaft connected to the tail of the power take-off input shaft by splines, and an output gear shaft meshing with the input gear shaft; a power take-off input shaft bearing is arranged on the rear cover housing, and a bearing seat is arranged on the power take-off housing;

[0009] The power take-off transition plate is arranged between the rear cover housing and the power take-off housing; an oil pump connected to the intermediate shaft assembly is arranged in the clutch housing; the special features thereof are:

[0010] It also includes a right lubricating oil pipe connected to the oil pump, a power take-off lubricating oil pipe connected to the right lubricating oil pipe, and a third oil passage, a fourth oil passage, a fifth oil passage and a sixth oil passage; a first oil pipe hole is provided at a connection between the transmission housing and the rear cover body, located above the rear bearing of the intermediate shaft; a second oil pipe hole is provided at one end of the rear cover housing, away from the rear cover body and located above the input shaft of the power take-off;

[0011] The right lubricating oil pipe and the power take-off lubricating oil pipe constitute the first oil passage and the second oil passage respectively, the right lubricating oil pipe passes through the first oil pipe hole and is connected to one end of the power take-off lubricating oil pipe, a plurality of spray holes are arranged on the right lubricating oil pipe, and the other end of the power take-off lubricating oil pipe is connected to the second oil pipe hole; the end of the rear cover shell body close to the power take-off body is provided with a power take-off mounting hole, and the rear cover shell body is provided with a rectangular groove connecting the second oil pipe hole and the power take-off mounting hole, and the rectangular groove constitutes the third oil passage; the outer ring of the bearing seat is evenly distributed with four oil grooves connected to the power take-off mounting hole on the circumference, the oil groove located at the bottom constitutes the fourth oil passage, and the oil groove located at the second bottom constitutes the fifth oil passage; the inner side wall of the power take-off mounting hole is provided with a groove, the position of the groove is higher than the fourth oil passage, and the groove and the outer ring of the power take-off input shaft bearing constitute the sixth oil passage; the first oil passage, the second oil passage, the third oil passage, the fourth oil passage, the fifth oil passage and the sixth oil passage are connected in sequence, and are commonly used for lubrication of the power take-off body and the transmission body.

[0012] Furthermore, the rotor in the oil pump is connected to the intermediate shaft assembly via a spline; a partition wall is provided in the clutch housing, and the oil pump is provided on the partition wall.

[0013] Furthermore, the rear cover shell and the power take-off transition plate (102) are sealed by a gasket; the power take-off shell and the power take-off transition plate are sealed by a gasket.

[0014] Furthermore, the minimum cross-sectional area of ​​the fourth oil passage and the fifth oil passage is 36 mm. 2 The cross-sectional area of ​​the right lubricating oil pipe and the power take-off lubricating oil pipe is 28.3mm 2 .

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model provides a transmission that shares a lubrication structure with a power take-off. Oil holes, rectangular grooves, grooves and four oil grooves are provided in the transmission and the power take-off, which are connected with the right lubricating oil pipe and the lubricating oil pipe of the power take-off, so that the transmission and the power take-off can be forced to be lubricated together. Moreover, the lubricating oil can flow back into the transmission after lubricating the power take-off, so that the lubricating oil can be recycled. There is no need to add lubricating oil to the power take-off separately, so the lubrication efficiency is high, the operation can be simplified and the use cost can be saved.

[0017] 2. The utility model provides a transmission that shares a lubrication structure with a power take-off, wherein the first oil passage, the second oil passage, the third oil passage, the fourth oil passage, the fifth oil passage and the sixth oil passage are all integrated in the housing of the transmission and the power take-off, without the risk of corrosion, deformation and damage, and the solution has high reliability and high integration;

[0018] 3. The utility model provides a transmission that shares a lubrication structure with a power take-off, and an O-ring is provided on the piston in the power take-off to prevent leakage of lubricating oil;

[0019] 4. The utility model provides a transmission that shares a lubrication structure with a power take-off. The outer ring of the bearing has four oil grooves evenly distributed on the circumference. When the bearing seat is installed at any angle, at least two oil grooves can be guaranteed to allow the inside of the power take-off to communicate with the transmission oil. No special requirements are made on the installation angle of the bearing seat. At the same time, the evenly distributed oil grooves can ensure that the bearing seat bears a uniform load;

[0020] 5. The utility model can provide forced lubrication for a power take-off whose installation position is higher than the center horizontal plane of the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0022] Figure 2 Partial cross-section of an embodiment of the utility model Figure 1 , where the arrow indicates the flow direction of the lubricating oil when the power take-off is lubricated;

[0023] Figure 3 Partial cross-section of an embodiment of the utility model Figure 2 , where the arrow indicates the flow direction of the return lubricating oil after lubrication of the power take-off;

[0024] Figure 4 It is a cross-sectional view of the bearing seat in the embodiment of the utility model, wherein “·” indicates that the lubricating oil flows from the transmission to the power take-off, and “×” indicates that the lubricating oil flows from the power take-off to the transmission;

[0025] Figure 5 It is a local 3D cross-sectional view of an embodiment of the present utility model.

[0026] Description of reference numerals:

[0027] 101-power take-off housing, 102-power take-off transition plate, 103-bearing seat, 104-O-ring, 105-oil seal, 106-input gear shaft, 107-output gear shaft, 108-input side front bearing, 109-input side rear bearing, 110-output side front bearing, 111-output side rear bearing, 112-piston; 201-oil pump, 202-right lubricating oil pipe, 203-power take-off lubricating oil pipe, 204-rear cover housing, 205-rear cover body, 206- Transmission housing, 207-clutch housing, 208-intermediate shaft assembly, 209-intermediate shaft front bearing, 210-intermediate shaft rear bearing, 211-power take-off input shaft, 212-power take-off input shaft bearing; 1031-fourth oil channel, 1032-fifth oil channel, 2041-sixth oil channel; 2042-third oil channel; Q1-first cavity, Q2-second cavity; k1-first oil pipe hole, k2-second oil pipe hole, k3-power take-off mounting hole; L1-rectangular groove, L2-groove. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] A transmission that shares a lubrication structure with a power take-off, see Figure 1-Figure 5 , including a power take-off body and a transmission body;

[0030] The power take-off body comprises a power take-off housing 101, a power take-off transition plate 102, a bearing seat 103 arranged on the power take-off housing 101, a piston 112 connected to one end of an input gear shaft 106, an oil seal 105 arranged between an output gear shaft 107 and the power take-off housing 101, an input gear shaft 106 connected to the rear end of a power take-off input shaft 211 by splines, an output gear shaft 107 meshing with the input gear shaft 106, and an input side front bearing 108, an input side rear bearing 109, an output side front bearing 110, and an output side rear bearing 111 arranged in the power take-off housing 101;

[0031] The transmission body includes a transmission housing, an intermediate shaft assembly 208 disposed in the transmission housing, an intermediate shaft front bearing 209 and an intermediate shaft rear bearing 210 disposed at both ends of the intermediate shaft assembly 208, a power take-off input shaft 211 spline-connected to the rear end of the intermediate shaft assembly 208, a power take-off input shaft bearing 212 disposed on the power take-off input shaft 211, a main box right lubricating oil pipe 202 connected to the oil pump 201, a power take-off lubricating oil pipe 203 connected to the main box right lubricating oil pipe 202, and a third oil passage 2042 and a fourth oil passage 2044. 1031, the fifth oil passage 1032 and the sixth oil passage 2041; the transmission housing includes a clutch housing 207, a transmission housing 206, a rear cover body 205 and a rear cover housing 204 which are connected in sequence by bolts; the power take-off transition plate 102 is arranged between the rear cover housing 204 and the power take-off housing 101; an oil pump 201 is arranged in the middle of the clutch housing 207; the oil pump 201 has a rotor which is spline-connected to the intermediate shaft assembly 208; a partition wall is arranged in the clutch housing 207, and the oil pump 201 is arranged on the partition wall.

[0032] The connection between the transmission housing 206 and the rear cover body 205 is located above the intermediate shaft rear bearing 210 and is provided with a first oil pipe hole k1. The rear cover housing 204 is located at one end away from the rear cover body 205 and above the power take-off input shaft 211 and is provided with a second oil pipe hole k2; the right lubricating oil pipe 202 and the power take-off lubricating oil pipe 203 respectively constitute the first oil channel and the second oil channel, the right lubricating oil pipe 202 passes through the first oil pipe hole k1 and is connected to one end of the power take-off lubricating oil pipe 203, a plurality of spray holes are provided on the right lubricating oil pipe 202, and the other end of the power take-off lubricating oil pipe 203 is connected to the second oil pipe hole k2; the rear cover housing 204 is provided with a power take-off mounting hole k3 at one end close to the power take-off body, and the rear cover housing 204 is provided with a connection for the second oil The rectangular groove L1 of the tube hole k2 and the power take-off mounting hole k3, the rectangular groove L1 constitutes the third oil passage 2042; the outer ring of the bearing seat 103 is evenly distributed on the circumference with four oil grooves connected with the power take-off mounting hole k3, the oil groove located at the bottom constitutes the fourth oil passage 1031, and the oil groove located at the second bottom constitutes the fifth oil passage 1032; the rear cover shell 204 is provided with a groove L2 on the side wall of the power take-off mounting hole k3 at a position 20 mm higher than its lower edge, and the groove L2 and the outer ring of the power take-off input shaft bearing 212 constitute the sixth oil passage 2041; the first oil passage, the second oil passage, the third oil passage 2042, the fourth oil passage 1031, the fifth oil passage 1032 and the sixth oil passage are connected in sequence, and are commonly used for lubrication of the power take-off body and the transmission body.

[0033] The piston sealing structure includes two annular grooves arranged at the end of the piston 112 away from the input gear shaft 106, and an O-ring 104 is arranged in each annular groove. The rear cover housing 204 and the power take-off transition plate 102, as well as the power take-off housing 101 and the power take-off transition plate 102 are sealed by gaskets. A sealed second cavity Q2 is formed between the piston 112 and the power take-off housing 101, so that the lubricating oil does not flow into the air cavity.

[0034] In this embodiment, the cross-sectional area of ​​the fourth oil passage 1031 and the fifth oil passage 1032 are both 36 mm 2 The cross-sectional area of ​​the right lubricating oil pipe 202 and the power take-off lubricating oil pipe 203 are both 28.3mm 2 , will not limit the oil inlet and outlet of the power take-off.

[0035] The lubrication method of the transmission sharing the lubrication structure with the power take-off comprises the following steps:

[0036] Step 1: When the transmission is working, the inner rotor of the oil pump 201 rotates with the intermediate shaft to deliver part of the lubricating oil to the right lubricating oil pipe 202 of the main box. After the oil pipe finishes spraying multiple gears on the intermediate shaft assembly 208, the oil is delivered to the power take-off lubricating oil pipe 203.

[0037] Step 2: See Figure 2 After the lubricating oil passes through the lubricating oil pipe 203, it will flow through the oil passages of the rear cover housing 204 and the power take-off transition plate 102, and enter the first cavity Q1 where the power take-off body and the transmission body are connected. Part of the lubricating oil flows to the left here to lubricate the power take-off input shaft bearing 212; the other part flows into the power take-off through the internal gap of the input side front bearing 108 and the fourth oil passage 1031 of the bearing seat 103, and then fills the space in the lower half of the power take-off housing 101, soaking and lubricating the power take-off output gear 107 and the output side front bearing 110 and the output side rear bearing 111 mounted thereon; when the power take-off is working, the output gear shaft 107 will stir up the lubricating oil, splashing and lubricating the power take-off input gear shaft 106 and the input side rear bearing 109;

[0038] Step 3: See Figure 3 and Figure 4 When the lubricating oil level inside the power take-off reaches a certain height, it can flow out of the power take-off housing 101 through the fifth oil passage 1032 on the bearing seat 103, and then flow back into the transmission body through the sixth oil passage 2041 on the rear cover housing 204, and return to the circulation of the transmission's lubrication system.

Claims

1. A transmission power take-off assembly with a common lubrication structure, comprising a power take-off body and a transmission body; the transmission body comprising a transmission housing, an intermediate shaft assembly (208) disposed in the transmission housing, and a power take-off input shaft (211) connected to the intermediate shaft; the transmission housing comprising a clutch housing (207), a transmission housing (206), a rear cover body (205), and a rear cover housing (204) connected in sequence by bolts; the power take-off body comprising a power take-off housing (101), an intermediate shaft assembly (208) disposed in the transmission housing, and a power take-off input shaft (211) connected to the intermediate shaft An input gear shaft (106) connected to the rear of the clutch (211) by a spline, and an output gear shaft (107) meshing with the input gear shaft (106); a power take-off input shaft bearing (212) is arranged on the rear cover housing (204), and a bearing seat (103) is arranged on the power take-off housing (101); a power take-off transition plate (102) is arranged between the rear cover housing (204) and the power take-off housing (101); an oil pump (201) connected to the intermediate shaft assembly (208) is arranged in the clutch housing (207); the characteristics are: The invention also comprises a right lubricating oil pipe (202) connected to the oil pump (201), a power take-off lubricating oil pipe (203) connected to the right lubricating oil pipe (202), and a third oil passage (2042), a fourth oil passage (1031), a fifth oil passage (1032) and a sixth oil passage (2041); a first oil pipe hole (k1) is provided at a connection point between the transmission housing (206) and the rear cover body (205) located above the intermediate shaft rear bearing (210); the rear cover housing (204) is away from the rear cover body (2 05) and is provided with a second oil pipe hole (k2) at one end thereof and above the power take-off input shaft (211); the right lubricating oil pipe (202) and the power take-off lubricating oil pipe (203) respectively constitute a first oil passage and a second oil passage; the right lubricating oil pipe (202) passes through the first oil pipe hole (k1) and is connected to one end of the power take-off lubricating oil pipe (203); a plurality of spray holes are provided on the right lubricating oil pipe (202); the other end of the power take-off lubricating oil pipe (203) is connected to the second oil pipe hole (k2); the rear A power take-off mounting hole (k3) is provided at one end of the cover shell (204) close to the power take-off body, and a rectangular groove (L1) connecting the second oil pipe hole (k2) and the power take-off mounting hole (k3) is provided on the rear cover shell (204), and the rectangular groove (L1) constitutes a third oil passage (2042); four oil grooves connected to the power take-off mounting hole (k3) are evenly distributed on the circumference of the outer ring of the bearing seat (103), the oil groove located at the bottom constitutes a fourth oil passage (1031), and the oil groove located at the next lower constitutes a fifth oil passage (103 2); a groove (L2) is provided on the inner side wall of the power take-off mounting hole (k3); the position of the groove (L2) is higher than the fourth oil passage (1031); a sixth oil passage (2041) is formed between the groove (L2) and the outer ring of the power take-off input shaft bearing (212); the first oil passage, the second oil passage, the third oil passage (2042), the fourth oil passage (1031), the fifth oil passage (1032) and the sixth oil passage (2041) are connected in sequence and are used together for lubricating the power take-off body and the transmission body.

2. A transmission power take-off assembly with a common lubrication structure according to claim 1, characterized in that: The rotor in the oil pump (201) is connected to the intermediate shaft assembly (208) via a spline; a partition wall is provided in the clutch housing (207), and the oil pump (201) is provided on the partition wall.

3. A transmission power take-off assembly with a common lubrication structure according to claim 2, characterized in that: The rear cover shell (204) and the power take-off transition plate (102) are sealed by a gasket; the power take-off shell (101) and the power take-off transition plate (102) are sealed by a gasket.

4. A transmission power take-off assembly with a common lubrication structure according to claim 3, characterized in that: The minimum cross-sectional area of ​​the fourth oil passage (1031) and the fifth oil passage (1032) is 36 mm 2 The cross-sectional area of ​​the right lubricating oil pipe (202) and the power take-off lubricating oil pipe (203) is 28.3 mm 2 .

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