CN205298476U - Axle gear box - Google Patents

Abstract

The utility model discloses an axle gear box. The box body includes an upper box body and a lower box body. The upper box body is provided with a ventilator, and the lower box body is provided with an oil dipstick; the box body is provided with a first transmission shaft and a second transmission shaft. Two transmission shafts, the bevel gear of the first transmission shaft is in orthogonal mesh with the bevel gear of the second transmission shaft; the first transmission shaft and the second transmission shaft are fixed on the box through the bearing seat, and the bottom of the box is provided with a gear oil pump, The input shaft of the gear oil pump meshes with the output gear on the second transmission shaft through the transmission gear. The axle gear box of the utility model has good mechanical properties, and can realize multi-stage transmission of power. At the same time, the gear oil pump of the lubrication system is driven by the second transmission shaft, so that the lubrication is better and the errors are less likely to occur.

Description

an axle gearbox

technical field

The utility model relates to power transmission equipment, in particular to an axle gear box.

Background technique

The existing gearbox lubrication for intercity EMUs adopts the splash lubrication method, that is, the lubricating oil stored at the bottom of the gearbox is brought to the pinion and the inner wall of the gearbox through the rotation of the driven gear, and then through the specially set oil circuit to the inner wall of the gearbox. Bearings are lubricated.

The inner ring of the driven gear bearing is directly installed on the axle through interference fit, and the outer ring is directly matched with the gear box body, that is, the bearing seat is set on the gear box body. Since the gear box body is composed of upper box body and lower box body Composition, the sub-box surface passes through the driven gear bearing seat, the machining error, assembly error of the gearbox, and the slight movement between the sub-box surfaces during the operation of the vehicle will reduce the life of the driven gear bearing, and even cause the bearing to malfunction. In addition, due to the high operating speed of the intercity EMU vehicles, the speed of the gearbox bearings and gears has also increased significantly, resulting in high air pressure inside the gearbox and poor oil return. There will be oil leakage between the outer end cover and the box body, and the oil leakage will cause poor lubrication of the driven gear bearing. At the same time, during the assembly process of the gearbox, the adjustment of the axial clearance of the driven gear bearing is realized through the matching grinding seal. This clearance adjustment method makes the assembly process of the gearbox complicated and inefficient.

At the same time, most of the existing axle gearboxes adopt a parallel transmission mode, which makes it difficult to control the transmission efficiency ratio, and is also prone to safety problems during high-speed operation. The lubrication system of the existing gearbox is independent of the drive shaft, and the oil mist formed by the lubricating oil is mostly discharged directly into the air, and the treatment of the oil mist is not appropriate.

Utility model content

The purpose of the utility model is to provide an axle gear box.

In order to achieve the above purpose, an embodiment of the utility model provides an axle gearbox, including a box body, the box body includes an upper box body and a lower box body, and the upper box body is provided with a valve for realizing gas exchange inside and outside the box body. Breather, the lower box is equipped with an oil dipstick for detecting the oil level at the bottom of the box;

The box body is provided with a first transmission shaft and a second transmission shaft, and the bevel gear of the first transmission shaft meshes orthogonally with the bevel gear of the second transmission shaft; the first transmission shaft and the second transmission shaft are fixed on the box body through the bearing seat Above, the bottom of the box body is provided with a gear oil pump, and the input shaft of the gear oil pump meshes with the output gear on the second transmission shaft through the transmission gear.

Preferably, the box body is provided with a draw arm seat and equipped with a draw arm assembly.

Preferably, the gear oil pump is a bidirectional gear oil pump.

Preferably, the distance between the centerline of the input shaft of the gear oil pump and the centerline of the second transmission shaft is 191mm.

Preferably, the first transmission shaft is perpendicular to the center line of the second transmission shaft.

Preferably, the box body is cast from ZG230-450 material, and the wall thickness of the box body is 12mm.

Preferably, the transmission ratio of the first transmission shaft to the second transmission shaft is 36:22.

Preferably, the size of the cabinet is 955 mm in length x 787 mm in width x 796 mm in height.

Preferably, the aerator includes an outer shell and an inner shell arranged inside the outer shell, the bottom of the inner shell is provided with an air intake pipe, the inner cavity of the inner shell is provided with a downwardly recessed lower arc panel, and the lowest part of the lower arc panel is provided with Drip holes, the lower arc panel is provided with air holes near the inner wall of the inner shell; the lower arc panel is provided with a screen, the upper arc panel is provided on the screen, and the middle of the upper arc panel is provided with an air outlet; the air inlet pipe and the lower A rotating plate is arranged between the arc panels, and the two ends of the rotating plate are rotatably embedded in the inner wall of the inner shell; blades are arranged on both sides of the middle part of the rotating plate, and the blades are arc-shaped blades, and the radius of the blades is along the The central line of the rotating plate gradually decreases toward the middle of the rotating plate.

The axle gear box of the utility model has good mechanical properties, and can realize multi-stage transmission of power. At the same time, the gear oil pump of the lubrication system is driven by the second transmission shaft, so that the lubrication is better and the errors are less likely to occur. At the same time, the utility model is equipped with a good ventilator, which can carry out good treatment of more oil mist.

Description of drawings

Fig. 1 is a side view of the utility model;

Fig. 2 is another side view of the utility model;

Fig. 3 is the structural representation of utility model ventilator;

Figure 4 is a schematic diagram of the internal structure of the box.

Among them, 1. Upper box body; 2. Lower box body; 3. Breather; 4. Oil dipstick; 5. First transmission shaft; 6. Second transmission shaft; 7. Gear oil pump; 8. Pull arm seat; 9 , pull arm assembly; 51, bevel gear; 61, bevel gear; 62, transmission gear; 31, outer shell; 32, inner shell; 33, seal; 34, intake pipe; 36, drop hole; 37, air hole; 38 , screen mesh; 39, upper arc panel; 310, air outlet; 311, sponge; 312, air vent; 313, desiccant; 314, rotating plate.

detailed description

The utility model provides an axle gear box, which includes a box body. The box body includes an upper box body 1 and a lower box body 2. The upper box body 1 and the lower box body 2 can be fixedly connected together by bolts to form a larger space inside. Cavity box.

The upper box body 1 is provided with a ventilator 3 for realizing gas exchange inside and outside the box body, and the lower box body 2 is provided with an oil dipstick 4 for detecting the height of the oil level at the bottom of the box body.

The box is provided with a first transmission shaft 5 and a second transmission shaft 6, and the bevel gear 51 of the first transmission shaft 5 meshes orthogonally with the bevel gear 61 of the second transmission shaft 6, that is, the first transmission shaft 5 and the second transmission shaft The center line of the shaft 6 is vertical, and through the cooperation of bevel gears, the radial power input by the first transmission shaft 5 can be converted into the axial power of the second transmission shaft 6, so that the second transmission shaft 6 and the first transmission shaft 5 The installation direction is vertical. The first transmission shaft 5 and the second transmission shaft 6 can be installed on the plane where the joint surface of the upper case body 1 and the lower case body 2 is located, and the transmission ratio between the first transmission shaft 5 and the second transmission shaft 6 is 36:22.

The first transmission shaft 5 and the second transmission shaft 6 are fixed on the box body through the bearing seat to realize free rotation in the box body. The bottom of the box body is provided with a gear oil pump 7, and the input shaft of the gear oil pump 7 is connected to the second transmission shaft through a transmission gear 62 The output gear on the transmission shaft 6 meshes so that the second transmission shaft 6 can drive the gear oil pump 7 to lubricate when it rotates.

In an optimized embodiment of the present utility model, the box body is provided with a draw arm seat 8 and a draw arm assembly 9 . The gear oil pump is a two-way gear oil pump; the distance between the centerline of the input shaft of the gear oil pump and the centerline of the second transmission shaft is 191mm. The box body is cast from ZG230-450 material, and the wall thickness of the box body is 12mm; the size of the box body is 955㎜ in length x 787㎜ in width x 796㎜ in height.

The ventilator 3 of the present utility model includes an outer shell 31 and an inner shell 32 arranged inside the outer shell 31. The bottom of the inner shell 32 is provided with an air intake pipe 34, and the inner cavity of the inner shell 32 is provided with a downwardly recessed lower arc panel. The lowest part of the lower arc panel is provided with a drip hole 36, and the lower arc panel is provided with an air hole 37 near the inner wall of the inner shell 32; the lower arc panel is provided with a screen 38, and the screen 38 is provided with an upper arc panel 39. The middle part of the arc panel 39 is provided with an air outlet 310; between the air intake pipe 34 and the lower arc panel, a rotating plate 314 is arranged, and the two ends of the rotating plate 314 are rotatably embedded in the inner shell 32 inner wall; Both sides are provided with blades, the blades are arc-shaped blades, and the radius of the blades gradually decreases toward the middle of the rotating plate along the center line of the rotating plate.

The tops of the outer shell 31 and the inner shell 32 are provided with an air flow channel and a cap 33 , there is a cavity between the outer shell 31 and the inner shell 32 , a desiccant 313 is provided in the cavity, and a sponge 311 and a vent 312 are provided at the bottom. After the atomized oil formed in the box is treated by the air holes of the lower arc panel, an oil film is formed on the lower arc panel, and then flows out along the arc through the drip hole. After the incompletely removed atomized oil is treated by the upper arc panel, Treat on another curved surface to form oil dripping. The utility model allows the atomized oil to pass through two opposite arc panels to automatically process the atomized oil. The blades are arc-shaped blades, the area directly above the arc-shaped blades is the area where the air holes are located, and the area directly above the middle of the rotating plate is the position where the drip holes 36 are located. After the oil mist enters the inner shell 32, it enters the area where the air holes are located under the drainage of the arc-shaped blades, and also prolongs the walking path of the oil mist, so that it will preferentially enter the air holes.

Claims (8)

1. An axle gearbox, comprising a casing, the casing includes an upper casing and a lower casing, characterized in that: The upper box is provided with a ventilator for realizing gas exchange inside and outside the box, and the lower box is provided with an oil dipstick for detecting the oil level at the bottom of the box; The box body is provided with a first transmission shaft and a second transmission shaft, and the bevel gear of the first transmission shaft is in orthogonal mesh with the bevel gear of the second transmission shaft; the first transmission shaft and the second transmission shaft pass through The bearing seat is fixed on the box body, and the bottom of the box body is provided with a gear oil pump, and the input shaft of the gear oil pump meshes with the output gear on the second transmission shaft through a transmission gear. 2 . The axle gearbox according to claim 1 , wherein the box body is provided with a pull arm seat and a pull arm assembly. 3 . 3. The axle gearbox according to claim 1, wherein the gear oil pump is a bidirectional gear oil pump. 4. The axle gearbox according to claim 1, wherein the distance between the centerline of the input shaft of the gear oil pump and the centerline of the second transmission shaft is 191mm. 5. The axle gearbox of claim 1, wherein the first transmission shaft is perpendicular to the centerline of the second transmission shaft. 6 . The axle gearbox according to claim 1 , wherein the box body is cast from ZG230-450 material, and the wall thickness of the box body is 12 mm. 7. The axle gearbox according to claim 1, wherein the transmission ratio of the first transmission shaft to the second transmission shaft is 36:22. 8 . The axle gearbox according to claim 1 , wherein the size of the box is 955 mm in length x 787 mm in width x 796 mm in height.