Oil duct structure for actively lubricating bearing on partition plate at rear end of main box of gearbox

Abstract

The utility model discloses an oil duct structure for actively lubricating a bearing on a partition plate at the rear end of a main box of a gearbox, which comprises a mechanical pump and an oil suction pipe extending to the bottom of the gearbox, the mechanical pump is arranged on the partition plate at the rear end of the main box of the gearbox, and a closed output oil duct is arranged on the mechanical pump. And at least oil is supplied to a left intermediate shaft rear bearing position, an output shaft front bearing position and a right intermediate shaft rear bearing position which are arranged on the partition plate. Therefore, reliable oil supply guarantee can be provided through an active lubrication mode of pump pressure output for a bearing with a larger inner cavity perpendicular to the axial tangent plane of the gearbox, and the bearing is installed on the partition plate at the rear end of the main shell. Meanwhile, for other parts which are installed outside the partition plate at the rear end of the main shell and are difficult to depend on splashing lubricating oil to supply oil, reliable common guarantee can be provided by extending the oil duct in the oil duct structure in a forked mode.

Description

Technical Field

[0001] The utility model relates to an oil passage structure for actively lubricating a bearing on the rear end partition of the main box of a gearbox, belonging to the technical field of gearbox lubrication. Background Technique

[0002] Driven by the lightweight trend of new energy electric drive products for commercial vehicles, motors are developing rapidly towards high speeds. On the one hand, when the power of the motor is the same, increasing the speed can reduce the torque of the product, thereby making the motor smaller and achieving weight reduction. On the other hand, the high speed of the motor can reduce the number of gearbox gears, thus simplifying the gearbox.

[0003] However, the high speed of the motor will cause the speed of the input end gear shaft inside the gearbox to increase, resulting in higher lubrication requirements. Especially for the bearings installed on the main housing partition, due to the relatively large vertical cross-section of the inner cavity perpendicular to the gearbox axis, even if oil guiding ribs are designed at the bearing installation position and oil guiding grooves are opened for the bearing holes to drain lubricating oil, the splash lubrication effect is still not good, and there is a risk of poor bearing lubrication and high-temperature burning. During the design of the housing, the lubrication of the bearings installed on the partition of the main housing (main box) is an important aspect that needs to be considered in the housing structure design. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is: how to provide reliable and sufficient lubrication for bearings with poor splash lubrication effect.

[0005] In view of the above problems, the technical solution proposed by the utility model is:

[0006] An oil passage structure for actively lubricating a bearing on the rear end partition of the main box of a gearbox, including a mechanical pump and an oil suction pipe extending to the bottom of the gearbox. The mechanical pump is arranged on the partition at the rear end of the main box of the gearbox, and a closed output oil passage is provided from the mechanical pump to supply oil to at least the rear bearing position of the left intermediate shaft, the front bearing position of the output shaft, and the rear bearing position of the right intermediate shaft arranged on the partition.

[0007] The mechanical pump is provided with an output oil hole 1 to supply oil to the rear bearing position of the left intermediate shaft with an opening facing forward on the back of the mechanical pump. An input oil port 1 is arranged at the rear bearing position of the left intermediate shaft. The output oil passage includes a straight oil passage 1 arranged between the output oil hole 1 and the input oil port 1.

[0008] The mechanical pump is also provided with an output oil hole 2 to supply oil to the front bearing position of the output shaft with an opening facing backward behind the partition. An input oil port 2 is arranged at the front bearing position of the output shaft. The output oil passage also includes an oil passage 2 arranged between the output oil hole 2 and the input oil port 2.

[0009] There is an input oil port three at the right middle shaft rear bearing position in front of the partition board with the opening facing forward, and the output oil passage further includes an oil passage three that bifurcates from the oil passage two to the input oil port three.

[0010] The mechanical pump is also provided with an output oil hole three, and the output oil passage further includes an external oil delivery passage that extends from the output oil hole three to other components to be lubricated outside the partition board.

[0011] All the output oil passages are arranged in the board body of the partition board in the way of drilling. Advantages

[0012] 1. For the bearing with a relatively large inner cavity perpendicular to the axial section of the transmission on the rear partition board of the main housing, a reliable oil supply guarantee can be provided through the active lubrication method of pump pressure output;

[0013] 2. For other components installed outside the rear partition board of the main housing that are difficult to rely on splash lubricating oil for oil supply, reliable oil supply guarantee can also be provided by bifurcating and extending the oil passages in this oil passage structure. Description of the Drawings

[0014] Figure 1 It is a three-dimensional schematic diagram of the horizontal section of the transmission housing;

[0015] Figure 2 It is a rear view schematic diagram of the main housing of the main box of the transmission;

[0016] Figure 3 It is a front view schematic diagram of the main housing of the main box of the transmission;

[0017] Figure 4 It is a three-dimensional schematic diagram of the area where the mechanical pump is arranged on the partition board;

[0018] Figure 5 It is a schematic diagram of the oil passage structure.

[0019] In the figure: 1. Partition board; 2. Mechanical pump; 201. Output oil hole one; 202. Output oil hole two; 203. Output oil hole three; 204. Suction oil pipe; 301. Oil passage one; 302. Oil passage two; 303. Oil passage three; 304. External oil delivery passage; 4. Left middle shaft rear bearing position; 401. Input oil port one; 5. Output shaft front bearing position; 501. Input oil port two; 6. Right middle shaft rear bearing position; 601. Input oil port three. Specific Embodiments

[0020] The following further describes the present invention in conjunction with the drawings:

[0021] Such as Figure 1As shown in Fig. 3, an oil passage structure for actively lubricating the bearings on the rear partition of the main gearbox includes a mechanical pump 2 and an oil suction pipe 204 extending to the bottom of the gearbox. The mechanical pump 2 is arranged on the partition 1 at the rear end of the main gearbox of the gearbox, and a closed output oil passage is set from the mechanical pump 2 to supply oil to at least the rear bearing position 4 of the left intermediate shaft, the front bearing position 5 of the output shaft, and the rear bearing position 6 of the right intermediate shaft arranged on the partition 1. In this way, the rear bearing position 4 of the left intermediate shaft, the front bearing position 5 of the output shaft, and the rear bearing position 6 of the right intermediate shaft do not need to rely on splashing lubricating oil for lubrication, but a reliable oil supply guarantee is provided through the active lubrication method of pumping and outputting by the mechanical oil pump arranged in the gearbox.

[0022] As shown in Figure 2 Fig. 5, the mechanical pump 2 is provided with an output oil hole 1 201 to supply oil to the rear bearing position 4 of the left intermediate shaft with an opening facing forward arranged on the back of the mechanical pump 2. An input oil port 1 401 is arranged at the rear bearing position 4 of the left intermediate shaft. The output oil passage includes a straight oil passage 1 301 arranged between the output oil hole 1 201 and the input oil port 1 401. A part of the lubricating oil pumped out by the mechanical pump 2 enters the rear bearing position 4 of the left intermediate shaft through the oil passage 1 301 to supply lubricating oil for the rear bearing of the left intermediate shaft.

[0023] The mechanical pump 2 is also provided with an output oil hole 2 202 to supply oil to the front bearing position 5 of the output shaft with an opening facing backward arranged behind the partition 1. An input oil port 2 501 is arranged at the front bearing position 5 of the output shaft. The output oil passage also includes an oil passage 2 302 arranged between the output oil hole 2 202 and the input oil port 2 501. A part of the lubricating oil pumped out by the mechanical pump 2 enters the front bearing position 5 of the output shaft through the oil passage 2 302 to supply lubricating oil for the front bearing of the output shaft.

[0024] The rear bearing position 6 of the right intermediate shaft with an opening facing forward arranged in front of the partition 1 is provided with an input oil port 3 601. The output oil passage also includes an oil passage 3 303 branched from the oil passage 2 302 to the input oil port 3 601. A part of the lubricating oil pumped out by the mechanical pump 2 enters the front bearing position 5 of the output shaft through the oil passage 3 303 to supply lubricating oil for the rear bearing of the right intermediate shaft.

[0025] The mechanical pump 2 is also provided with an output oil hole 3 203. The output oil passage also includes an external oil delivery passage 304 extending from the output oil hole 3 203 to other components to be lubricated outside the partition 1.

[0026] The output oil passages are all arranged in the plate body of the partition 1 by drilling.

[0027] The above embodiments are only used to describe the present invention more clearly and should not be regarded as limiting the protection scope covered by the present invention. Any modification in an equivalent form should be regarded as falling within the protection scope covered by the present invention.

Claims

1. An oil channel structure for actively lubricating a bearing on a rear end partition of a gearbox main box, comprising a mechanical pump (2) and an oil suction pipe (204) extending to the bottom of the gearbox, characterized in that: The mechanical pump (2) is arranged on a partition (1) at the rear end of the gearbox main box, and a closed output oil passage is arranged from the mechanical pump (2) to supply oil to at least a left intermediate shaft rear bearing position (4), an output shaft front bearing position (5) and a right intermediate shaft rear bearing position (6) arranged on the partition (1).

2. The oil passage structure for actively lubricating the bearing on the rear end partition of the gearbox main box according to claim 1 is characterized in that: The mechanical pump (2) is provided with an output oil hole (201) for supplying oil to a left intermediate shaft rear bearing position (4) which is located on the back of the mechanical pump (2) and opens forward. An input oil port (401) is provided at the left intermediate shaft rear bearing position (4). The output oil passage comprises a straight oil passage (301) provided between the output oil hole (201) and the input oil port (401).

3. The oil passage structure for actively lubricating the bearing on the rear end partition of the gearbox main box according to claim 1 is characterized in that: The mechanical pump (2) is further provided with a second output oil hole (202) for supplying oil to an output shaft front bearing position (5) which is opened rearwardly of the partition plate (1). A second input oil port (501) is provided at the output shaft front bearing position (5). The output oil passage further comprises a second oil passage (302) provided between the second output oil hole (202) and the second input oil port (501).

4. The oil passage structure for actively lubricating the bearing on the rear end partition of the gearbox main box according to claim 3 is characterized in that: An input oil port 3 (601) is provided at the right intermediate shaft rear bearing position (6) which is opened forward and is arranged in front of the partition plate (1). The output oil passage also includes an oil passage 3 (303) which branches from the oil passage 2 (302) to the input oil port 3 (601).

5. The oil passage structure for actively lubricating the bearing on the rear end partition of the gearbox main box according to claim 1 is characterized in that: The mechanical pump (2) is also provided with a third output oil hole (203), and the output oil passage also includes an external oil passage (304) extending from the third output oil hole (203) to other parts to be lubricated outside the partition (1).

6. The oil passage structure for actively lubricating the bearing on the rear end partition of the gearbox main box according to any one of claims 2 to 4, characterized in that: The output oil passages are all provided in the plate body of the partition plate (1) in the form of drilling holes.

Images