Oil blocking structure for preventing ventilation plug of new energy mine truck transmission from leaking oil

Abstract

The utility model discloses an oil baffle structure for preventing a new energy mine truck transmission ventilation plug from leaking oil, which comprises an air passing channel arranged on a separation rib between upper and lower adjacent cavities of a labyrinth, an air inlet channel arranged on a separation rib of a cavity at the bottom and an oil baffle plate covering openings of all the cavities, mixed oil gas in the transmission enters the cavity in the bottom of the labyrinth through the gas inlet channel, then flows through all the cavities in the upper portion through all the gas passing channels, and finally is exhausted from the vent hole. The labyrinth has the effects that mixed oil gas in a transmission can be prevented from directly entering the upper cavity of the labyrinth and is forced to enter the labyrinth from the lower cavity to be subjected to oil-gas separation step by step, so that discharged gas does not contain lubricating oil liquid drops, and oil liquid on the edge of the air pressure cap is prevented from leaking outwards; and a first-stage oil-gas separation chamber is added, so that the discharged gas is further ensured not to contain lubricating oil liquid drops.

Description

Technical Field

[0001] This utility model relates to an oil-blocking structure for preventing oil leakage from the breather plug of a new energy mining truck transmission, belonging to the field of automotive transmission technology. Background Art

[0002] Like regular car transmissions, new energy mining truck transmissions have a certain level of lubricating oil at the bottom of the transmission housing. The lubrication of all transmission components above this level relies almost entirely on the splashing lubricating oil generated by the high-speed rotation of the large gear (main reduction gear) submerged below the lubricating oil level. These splashed lubricating oil droplets form an oil-air mixture in the upper space of the transmission.

[0003] From the start-up to the shutdown of the transmission, there is a process of heating up and cooling down inside the transmission. Due to the thermal expansion and contraction of air, a pressure difference inevitably exists between the inside and outside of the transmission. When the air pressure inside the transmission is higher or lower than the external air pressure, an internal and external venting structure needs to be installed on the transmission housing. This venting structure generally consists of a vent and a pressure cap. To prevent oil in the oil-air mixture from overflowing along with the gas when the air pressure is higher than the external air pressure, a labyrinth structure for oil-air separation is installed in the area near the vent inside the transmission to separate the oil and gas mixture.

[0004] The mining truck transmission is a dual-motor transmission with a dual intermediate shaft assembly. Its labyrinth structure and ventilation structure are located in the upper right corner of the intermediate shaft assembly on the right side of the front housing. The existing technology is as follows: the labyrinth is formed by the tie rods stretched from the inner wall of the front housing towards the rear housing to form multiple chambers. The side of the multiple chambers near the rear housing is an open type. After the rear housing is closed, the high-pressure mixed oil and gas in the transmission enters each chamber through the space between the rear housing and the labyrinth opening, so that the mixed oil and gas comes into contact with the cavity wall of each chamber, causing oil droplets to condense on the cavity wall, and the gas is discharged upward through the vent.

[0005] The problem with the above structure is that the gap between the opening of the labyrinth chamber near the rear shell and the rear shell is too large, which causes a large amount of mixed oil and gas to directly enter the chamber near the vent. This prevents the oil and gas from separating and being discharged from the vent, resulting in oil leakage from the edge of the pressure cap. Utility Model Content

[0006] The technical problem to be solved by this invention is: how to prevent a large amount of mixed oil and gas from directly entering the upper chamber of the labyrinth.

[0007] To address the above problems, the technical solution proposed by this utility model is as follows:

[0008] An oil-blocking structure for preventing oil leakage from the vent plug of a new energy mining truck transmission includes an air passage provided on the partition between adjacent chambers in the labyrinth, an air inlet passage provided on the partition of the bottom chamber, and an oil baffle plate covering all chamber openings. The mixed oil and gas in the transmission enters the bottom chamber of the labyrinth through the air inlet passage, then flows through each chamber in the upper part through the air passage, and finally exits from the vent.

[0009] A threaded hole is provided on the rib of the maze, and a bolt hole corresponding to the threaded hole is provided on the oil baffle plate. The oil baffle plate is fixed by the bolt through the bolt hole and the threaded hole.

[0010] On the outer side of the cover plate of the oil baffle, there is a folded edge formed by bending the oil baffle at 90°. The folded edge is close to the outer perimeter of the labyrinth ribs to restrict the rotation of the oil baffle.

[0011] Below the maze, there is an additional bracing. The bracing, the side wall of the front shell, and the baffle at the bottom of the maze form a bay area with an opening to the left. The oil baffle and its folded edge extend downward to the bracing, covering most of the upper side of the bay area to form a new chamber. An air inlet is set at the oil baffle close to the bracing.

[0012] The folded edge of the oil baffle extends downward to the left close to the tie rod, and the upper part of the folded edge extends downward horizontally to form an overlapping plate that is pressed against the tie rod. The air inlet is located between the oil baffle and the overlapping plate.

[0013] The tie rod has a second threaded hole, and the lap plate has a second bolt hole. The lap plate is fixed by the second bolt through the second bolt hole and the second threaded hole. Beneficial effects

[0014] 1. It can prevent the mixed oil and gas in the transmission from directly entering the upper chamber of the labyrinth, forcing it to enter from the lower chamber for step-by-step oil and gas separation, so that the discharged gas does not contain lubricating oil droplets, and prevents oil from leaking out from the edge of the pressure cap;

[0015] 2. An additional oil-gas separation chamber has been added to further ensure that the discharged gas does not contain lubricating oil droplets. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the labyrinth structure inside the front housing of the transmission, showing the chamber structure without the oil baffle installed.

[0017] Figure 2 for Figure 1 A partial schematic diagram;

[0018] Figure 3 This is a schematic diagram of the labyrinth structure inside the front housing of the transmission, showing the situation when the oil baffle is installed;

[0019] Figure 4 This is a three-dimensional schematic diagram of the oil baffle.

[0020] In the diagram: 1. Transmission; 101. Front housing; 2. Vent hole; 3. Chamber; 4. New chamber; 5. Rib; 501. Threaded hole one; 502. Air passage; 503. Air inlet passage; 6. Tie; 601. Threaded hole two; 7. Oil baffle; 701. Folded edge; 702. Overlap plate; 703. Bolt hole one; 704. Bolt hole two; 705. Air inlet; 8. Bolt one; 9. Bolt two. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] like Figure 1 As shown in Figure 4, an oil-blocking structure for preventing oil leakage from the vent plug of a new energy mining truck transmission includes an air passage 502 provided on the partition 5 between adjacent chambers 3 in the labyrinth, an air inlet passage 503 provided on the partition 5 of the bottom chamber 3, and an oil baffle 7 covering the openings of all chambers 3. The mixed oil and gas in the transmission 1 enters the bottom chamber 3 of the labyrinth through the air inlet passage 503, then flows through each of the upper chambers through the air passages 502, and finally exits from the vent 2. This prevents the mixed oil and gas in the transmission 1 from directly entering the upper chamber 3 of the labyrinth, forcing it to pass through each chamber 3 step by step from the lower chamber 3, separating the oil and gas at each stage, so that the discharged gas does not contain lubricating oil droplets and prevents oil leakage from the edge of the pressure cap.

[0023] The maze typically has multiple chambers 3; this application shows two as examples.

[0024] A threaded hole 501 is provided on the rib 5 of the maze, and a bolt hole 703 corresponding to the threaded hole 501 is provided on the oil baffle 7. The oil baffle 7 is fixed by a bolt 8 through the bolt hole 703 and the threaded hole 501.

[0025] On the outer side of the cover plate of the oil baffle 7, there is a folded edge 701 formed by bending the oil baffle 90°. The folded edge 701 is close to the outer periphery of the labyrinth rib 5 to restrict the rotation of the oil baffle 7.

[0026] Below the maze, there is an additional reinforcing rib 6. The reinforcing rib 6, the side wall of the front shell 101, and the partition rib 5 at the bottom of the maze form a bay area with an opening to the left. The oil baffle 7 and its folded edge 701 extend downward to the reinforcing rib 6, covering most of the upper side of the bay area to form a new chamber 4. An air inlet 705 is set at the oil baffle 7 close to the reinforcing rib 6. This is equivalent to adding a chamber and adding an oil-gas separation stage, further enhancing the oil-gas separation effect.

[0027] The folded edge 701 of the oil baffle 7 extends downwards to the left near the tie rod, and the upper part of the left-folded edge extends horizontally downwards to form an overlapping plate 702 that presses against the tie rod 6. The air inlet 705 is located between the oil baffle 7 and the overlapping plate 702. A threaded hole 601 is provided on the tie rod 6, and a bolt hole 704 is provided on the overlapping plate 702. Bolts 9 are used to fix the overlapping plate 702 through the bolt hole 704 and the threaded hole 601. This adds a first stage of oil-gas separation and also makes the fixation of the oil baffle 7 more stable.

[0028] The above embodiments are only used to describe the present invention more clearly, and should not be regarded as limiting the scope of protection covered by the present invention. Any equivalent modifications should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. An oil-blocking structure for preventing oil leakage from the breather plug of a new energy mining truck transmission, characterized in that: The system includes an air passage (502) provided on the partition (5) between adjacent chambers (3) in the labyrinth, an air inlet passage (503) provided on the partition (5) of the bottom chamber (3), and an oil baffle (7) covering the openings of all chambers (3). The mixed oil and gas in the transmission (1) enters the bottom chamber (3) of the labyrinth through the air inlet passage (503), then flows through each chamber in the upper part through each air passage (502), and finally exits from the vent (2).

2. The oil-blocking structure for preventing oil leakage from the breather plug of a new energy mining truck transmission according to claim 1, characterized in that: A threaded hole (501) is provided on the rib (5) of the maze, and a bolt hole (703) corresponding to the threaded hole (501) is provided on the oil baffle (7). The oil baffle (7) is fixed by the bolt (8) through the bolt hole (703) and the threaded hole (501).

3. The oil-blocking structure for preventing oil leakage from the breather plug of a new energy mining truck transmission according to claim 2, characterized in that: On the outside of the cover plate of the oil baffle (7), there is a folded edge (701) formed by bending the oil baffle 90°. The folded edge (701) is close to the periphery of the labyrinth rib (5) to restrict the rotation of the oil baffle (7).

4. The oil-blocking structure for preventing oil leakage from the breather plug of a new energy mining truck transmission according to claim 3, characterized in that: Below the maze, there is an additional bracing (6), which forms a bay area with an opening to the left by the bracing (6), the side wall of the front shell (101) and the partition (5) at the bottom of the maze. The oil baffle (7) and its folded edge (701) extend downward to the bracing (6), covering most of the upper side of the bay area to form a new chamber (4). An air inlet (705) is provided at the oil baffle (7) close to the bracing (6).

5. The oil-blocking structure for preventing oil leakage from the breather plug of a new energy mining truck transmission according to claim 4, characterized in that: The folded edge (701) of the oil baffle (7) extends downward to the left close to the tie rod, and the upper part of the folded edge extends downward horizontally to form an overlapping plate (702) that is pressed against the tie rod (6). The air inlet (705) is located between the oil baffle (7) and the overlapping plate (702).

6. The oil-blocking structure for preventing oil leakage from the breather plug of a new energy mining truck transmission according to claim 4, characterized in that: A threaded hole (601) is provided on the tie rod (6), and a bolt hole (704) is provided on the lap plate (702). The lap plate (702) is fixed by the bolt (9) through the bolt hole () and the threaded hole (601).

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