CN214743221U - Shell with breathing function, hub reduction gear and tractor - Google Patents

Abstract

The utility model relates to a shell with breathing function, a wheel-side reducer and a tractor, which comprises a steering knuckle shell and a wheel-side assembly, wherein the wheel-side assembly is horizontally arranged in a rotating way, and a lubricating cavity for lubricating oil to flow is arranged in the wheel-side assembly; one end of the wheel side assembly is provided with a connecting port communicated with the lubricating cavity, and one end of the steering knuckle shell is rotationally connected with the connecting port; the lateral wall of one end of the steering knuckle shell is provided with a breathing channel, the two ends of the breathing channel are respectively communicated with the lubricating cavity and the atmosphere, and a respirator is arranged at one end of the breathing channel communicated with the atmosphere. The utility model has the advantages that the channel connected with the outside atmosphere inside the wheel edge speed reducing assembly is reasonably built, and the oil leakage of the oil seal caused by the running of the wheel edge speed reducing assembly is avoided, thereby reducing the loss of the lubricating oil inside the cavity; meanwhile, the problem of oil channeling of the respirator in the conventional wheel-side speed reducer ventilation structure is solved, so that the loss of lubricating oil in the cavity is reduced, and the service life is prolonged.

Description

Shell with breathing function, hub reduction gear and tractor

Technical Field

The utility model relates to a tractor technical field, concretely relates to shell, wheel reduction gear and tractor with respiratory.

Background

The drive axle is positioned at the tail end of the power transmission system and mainly comprises a main speed reducer, a differential mechanism, a half shaft, a drive axle housing and the like. The universal transmission device has the main functions of transmitting the engine torque transmitted by the universal transmission device to a driving wheel through a main speed reducer, a differential mechanism, a half shaft and the like so as to realize speed reduction and torque increase; meanwhile, the transmission direction of torque is changed through a bevel gear pair of the main speed reducer, differential speed of wheels on two sides is achieved through a differential mechanism, and the effects of bearing and transmitting torque are achieved through a drive axle shell and the wheels. When a large main transmission ratio and a large ground clearance are required on a heavy, off-road or large vehicle, the gear mechanism of the second-stage speed reducer in the two-stage main speed reducer is generally made into two identical sets, and the two identical sets are respectively arranged near the driving wheels on the two sides, so that the two sets are called wheel-side speed reducers. The hub reduction gear mainly comprises a sun gear, a planet gear, a gear ring and a planet gear carrier, and has the main function of transmitting the rotating speed and the torque transmitted by the main reduction gear to wheels after speed reduction and torque increase so as to ensure that the wheels generate larger driving force under the reaction of ground adhesion, reduce the stress of each part in front of the hub reduction gear and further meet the matching requirement of the whole transmission system.

The core of the hub reduction gear assembly is a planetary gear mechanism, in order to obtain a larger transmission ratio, a sun gear is generally selected as a driving part, a planet gear carrier is taken as a driven part, and a gear ring is fixed; the driving member sun gear is connected with the half shaft, the driven member planet gear carrier is connected with the wheel, and the gear ring is connected with the shell. At present, the traditional hub reduction gear assembly has the following defects in operation: 1. in the operation process of the front axle, the temperature of the wheel edge assembly is gradually increased, the internal air pressure is increased, and oil leakage of the oil seal is caused; 2. when the front axle operates, the temperature of the wheel edge assembly is gradually increased, the internal air pressure is increased, when the internal pressure of the wheel edge assembly exceeds the opening pressure of a breather, the breather starts to work, a vent plug is opened, high-temperature and high-pressure air in the assembly is discharged out of a cavity along a channel but is limited by the structure, and the breather is designed and installed at the large end of the tapered roller bearing; during rotation, under the influence of centrifugal force, lubricating oil flows from the small end to the large end and is accumulated in the ventilation channel to form foam, and after the respirator is opened, the formed lubricating oil foam overflows from the respirator along the ventilation channel under the action of pressure to cause oil leakage of the respirator.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a shell, wheel reduction gear and tractor with respiratory is provided, aim at solving above-mentioned technical problem.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a shell with a breathing function comprises a steering knuckle shell and a wheel edge assembly, wherein the wheel edge assembly is horizontally and rotatably arranged, and a lubricating cavity for lubricating oil to flow is formed in the wheel edge assembly; a connecting port connected with the lubricating cavity is formed in one end of the wheel side assembly, and one end of the steering knuckle shell is rotatably connected with the connecting port; and a breathing passage is arranged on the side wall of one end of the steering knuckle shell, two ends of the breathing passage are respectively communicated with the lubricating cavity and the atmosphere, and a respirator is arranged at one end of the breathing passage communicated with the atmosphere.

The utility model has the advantages that: in the operation process, the pressure inside the lubricating cavity is continuously increased, and after the pressure inside the lubricating cavity is increased to a certain pressure value, the pressure difference between the inside of the lubricating cavity and the atmosphere is utilized to push the respirator away, so that the pressure inside the lubricating cavity is released, the phenomenon of oil leakage of an oil seal is avoided, the waste of lubricating oil is avoided, and the lubricating oil and the cost are saved. The utility model not only reasonably builds the channel connecting the lubricating cavity in the wheel edge speed reducing assembly with the outside atmosphere, and avoids oil leakage of the oil seal when the wheel edge speed reducing assembly operates, thereby reducing the loss of the lubricating oil in the lubricating cavity; meanwhile, the problem of oil channeling of a breather in the existing wheel reduction gear ventilation structure is solved, so that the loss of lubricating oil in a lubricating cavity is reduced, and the service life is prolonged.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the breathing passage comprises a first passage and a second passage, the first passage is horizontally arranged, and one end of the first passage is communicated with the lubricating cavity; one end of the second channel is communicated with the other end of the first channel, the other end of the second channel extends upwards to be communicated with the atmosphere, and the respirator is installed at the other end of the second channel.

The beneficial effects of adopting above-mentioned further scheme are that the operation in-process, after the pressure increase of lubricated intracavity portion to certain pressure value, utilize its inside and atmospheric pressure difference to push away the respirator for the inside gas of wheel limit assembly is discharged to the atmosphere from passageway one and passageway two, with the pressure of release lubricated intracavity portion, avoids appearing the phenomenon of oil blanket oil leak, thereby avoids the waste of lubricating oil, practices thrift lubricating oil and cost.

Above-mentioned scheme can realize lubricated intracavity pressure's quick release, but the in-process of gas emission has some lubricating oil to discharge along with gas together, appears a little oil leak phenomenon.

Furthermore, the breathing passage further comprises a third passage which is horizontally arranged, and two ends of the third passage are respectively communicated with the inside of the wheel edge assembly and one end of the second passage.

The beneficial effect of the further scheme is that in the operation process, after the pressure in the lubricating cavity is increased to a certain pressure value, the pressure difference between the interior of the lubricating cavity and the atmosphere is utilized to push away the respirator, so that the gas in the lubricating cavity is discharged to the atmosphere from the first channel, the second channel and the third channel to release the pressure in the lubricating cavity; meanwhile, a little of lubricating oil in the lubricating cavity flows into the first channel along with the gas, then flows downwards into the third channel at the communication part of the first channel and the second channel, and returns to the inside of the lubricating cavity again, so that the phenomenon of oil leakage of an oil seal is avoided, the waste of the lubricating oil is avoided, and the lubricating oil and the cost are saved.

Furthermore, a mounting hole for mounting a sun gear shaft is horizontally arranged at the center of one end of the steering knuckle shell, and two ends of the mounting hole are respectively communicated with the lubricating cavity and the interior of the steering knuckle shell; the breathing passage further comprises a fourth passage, the fourth passage is vertically arranged, and two ends of the fourth passage are respectively communicated with the mounting hole and the third passage.

The beneficial effects of adopting above-mentioned further scheme are that simple structure, reasonable in design, the lubricating oil of exhaust backward flow passes through in the four entering mounting holes of passageway to play the lubricated effect of preferred, the lubricated effect is better to the sun gear axle.

Further, the respirator comprises a sealing seat and a sealing cover, the sealing seat is fixedly installed at one end, communicated with the atmosphere, of the breathing passage, one end of the sealing seat extends out of the breathing passage and is provided with at least one air hole penetrating through the breathing passage from inside to outside, and the sealing cover is fixedly installed at one end of the sealing seat; an air passage with two open ends and a thick upper part and a thin lower part is arranged in the sealing seat, and a sealing ball is slidably and fixedly arranged in the thick part of the air passage; sliding the sealing ball until it seals or opens the butt port of the airway.

The beneficial effect who adopts above-mentioned further scheme is when the operation, utilizes the pressure differential between the inside and atmosphere of lubricated chamber to promote the ball sealer and slide to open the port of the thick portion of air flue, make gas release away from the gas pocket, and then release pressure, convenient to use.

Further, the sealing ball is fixedly connected with the sealing cover through an elastic piece.

When the further scheme is adopted, the sealing cover is pushed to slide by utilizing the pressure difference between the inside of the lubricating cavity and the atmosphere during operation, so that the sealing ball opens the air passage to release pressure, and the elastic part is in a compressed state at the moment; after pressure release accomplished, the inside pressure in lubricated chamber equals with atmospheric pressure, and the ball sealer return under the effect of elastic component elasticity this moment, seals the air flue, convenient to use.

The utility model discloses still relate to a wheel reduction gear, reach as above including the sun gear axle the shell, sun gear axle level pivoted is installed in the one end of knuckle casing, its one end extends to in the wheel limit assembly to through drive assembly with the transmission of wheel limit assembly is connected, the other end extends to in the knuckle casing for connect the driving piece.

The beneficial effect of adopting above-mentioned further scheme is that when the operation, driving piece drive sun gear shaft and rotate, and sun gear shaft utilizes transmission assembly to drive the round of limit assembly and rotates, and the transmission is convenient, and transmission efficiency is high.

Furthermore, the transmission assembly comprises a gear ring assembly and a plurality of planet gears, the gear ring assembly is coaxially and fixedly sleeved outside one end of the sun gear shaft and is fixedly connected with one end of the steering knuckle shell; the plurality of planet gears are uniformly distributed between the gear ring component and one end of the sun gear shaft at intervals along the circumferential direction of the sun gear shaft and are respectively in rotary connection with the wheel edge assembly through planet shafts; one end of the sun wheel shaft is in a gear shape and is respectively meshed with the plurality of planet gears; the sun wheel shaft rotates to drive the plurality of planetary gears to synchronously rotate so as to drive the wheel edge assembly to rotate.

The beneficial effect of adopting above-mentioned further scheme is that when the operation, the sun gear shaft rotates and drives a plurality of planetary gear synchronous rotation to drive wheel limit assembly to rotate, and the transmission is convenient, and transmission efficiency is high.

Further, the hub assembly comprises a hub and a planet carrier, and the hub is coaxially sleeved outside the sun gear shaft and is rotationally connected with one end of the steering knuckle shell; the planet wheel carrier is sleeved outside one end of the sun wheel shaft and is fixedly connected with the wheel hub, one end of each planet shaft is fixedly connected with the planet wheel carrier, and the other end of each planet shaft is rotatably connected with the corresponding planet gear; the planet wheel carrier is provided with an oil port for lubricating oil to pass through, and the oil port is detachably provided with a plug screw.

When the scheme is adopted, the sun wheel shaft rotates to drive the plurality of planetary gears to synchronously rotate so as to drive the planetary gear carrier and the hub to rotate, so that the transmission is convenient and the transmission efficiency is high; in addition, lubricating oil passes through the oil port and gets in and out, and the oil port is sealed through the plug screw, convenient to use.

The utility model discloses still relate to a tractor, include as above the wheel reduction gear.

The novel pressure discharge and lubricating oil backflow structure has the advantages that a channel which is connected with the outside atmosphere inside the hub reduction assembly is reasonably built, and oil seal oil leakage caused by temperature rise and internal air pressure increase in the running process of the hub reduction assembly can be avoided, so that the lubricating oil loss inside the cavity is reduced, and the service life of the oil seal is prolonged; meanwhile, the problem of breather oil channeling caused by overflow of lubricating oil along a ventilation channel due to the fact that lubricating oil in the conventional wheel-side speed reducer ventilation structure is influenced by centrifugal force in the rotating process of the tapered roller bearing is solved, so that the loss of the lubricating oil in the cavity is reduced, and the service life is prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

fig. 3 is a schematic structural diagram of the breathing passage of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the steering knuckle comprises a steering knuckle shell, 2, a first channel, 3, a second channel, 4, a third channel, 5, a sun gear shaft, 6, a fourth channel, 7, a sealing seat, 8, a sealing cover, 9, an air channel, 10, a sealing ball, 11, an elastic element, 12, a gear ring component, 13, a planetary gear, 14, a planetary shaft, 15, a hub, 16, a planet carrier, 17, a plug screw, 18, a tapered roller bearing, 19 and an air hole.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 3, the utility model provides a housing with breathing function, which comprises a steering knuckle housing 1 and a wheel side assembly, wherein the wheel side assembly is horizontally arranged in a rotating way, and a lubricating cavity for lubricating oil to flow is arranged in the wheel side assembly; one end of the wheel side assembly is provided with a connecting port communicated with the lubricating cavity, and one end of the steering knuckle shell 1 is rotatably connected with the connecting port; the lateral wall of one end of the steering knuckle shell 1 is provided with a breathing channel, the two ends of the breathing channel are respectively communicated with the lubricating cavity and the atmosphere, and a respirator is arranged at one end of the breathing channel communicated with the atmosphere. In the operation process, the pressure inside the lubricating cavity is continuously increased, and after the pressure inside the lubricating cavity is increased to a certain pressure value, the pressure difference between the inside of the lubricating cavity and the atmosphere is utilized to push the respirator away, so that the pressure inside the lubricating cavity is released, the phenomenon of oil leakage of an oil seal is avoided, the waste of lubricating oil is avoided, and the lubricating oil and the cost are saved. The utility model not only reasonably builds the channel connecting the inside of the hub reduction assembly with the outside atmosphere, and avoids oil leakage of the oil seal when the hub reduction assembly operates, thereby reducing the loss of lubricating oil in the cavity; meanwhile, the problem of oil channeling of the respirator in the conventional wheel-side speed reducer ventilation structure is solved, so that the loss of lubricating oil in the cavity is reduced, and the service life is prolonged.

One end of the knuckle housing 1 is connected to the wheel side assembly in a manner that can be conceived by those skilled in the art, and the knuckle housing 1 does not rotate with the wheel side assembly and does not affect the rotation of the wheel side assembly.

Example 1

On the basis of the structure, in the embodiment, the breathing passage comprises a first passage 2 and a second passage 3, wherein the first passage 2 is horizontally arranged, and one end of the first passage is communicated with the lubricating cavity; one end of the second channel 3 is communicated with the other end of the first channel 2, the other end of the second channel extends upwards to be communicated with the atmosphere, and the respirator is installed at the other end of the second channel 3. In the operation process, after the pressure in the lubricating cavity is increased to a certain pressure value, the respirator is pushed open by utilizing the pressure difference between the inside of the lubricating cavity and the atmosphere, so that the gas in the lubricating cavity is discharged to the atmosphere from the first channel 2 and the second channel 3, the pressure in the lubricating cavity is released, the phenomenon of oil leakage of an oil seal is avoided, the waste of lubricating oil is avoided, and the lubricating oil and the cost are saved.

Above-mentioned scheme can realize lubricated intracavity pressure's quick release, but the in-process of gas emission has some lubricating oil to discharge along with gas together, appears a little oil leak phenomenon.

Example 2

On the basis of the first embodiment, in this embodiment, the breathing passage further includes a third passage 4 horizontally disposed, and two ends of the third passage 4 are respectively communicated with the inside of the lubrication cavity and the second passage 3. In the operation process, after the pressure in the lubricating cavity is increased to a certain pressure value, the respirator is pushed away by utilizing the pressure difference between the interior of the lubricating cavity and the atmosphere, so that the gas in the lubricating cavity is discharged into the atmosphere from the first channel 2, the second channel 3 and the third channel 4 to release the pressure in the lubricating cavity; meanwhile, a little lubricating oil in the lubricating cavity flows into the first channel 2 along with the gas, then flows downwards into the third channel 4 at the communication part of the first channel 2 and the second channel 3, and returns to the inside of the lubricating cavity again, so that the phenomenon of oil leakage of an oil seal is avoided, the waste of the lubricating oil is avoided, and the lubricating oil and the cost are saved.

Example 3

On the basis of the second embodiment, in the second embodiment, the center of one end of the knuckle housing 1 is horizontally provided with a mounting hole for mounting the sun gear shaft 5, and two ends of the mounting hole are respectively communicated with the lubricating cavity and the inside of the knuckle housing 1; the breathing passage further comprises a passage four 6, the passage four 6 is vertically arranged, and two ends of the passage four are respectively communicated with the mounting hole and the passage three 4. This scheme simple structure, reasonable in design, the lubricating oil of exhaust backward flow passes through in the four 6 entering mounting holes of passageway to play the lubricated effect of preferred, lubricated effect is better to sun gear axle 5.

The sun gear shaft 5 is rotatably connected to the knuckle housing 1 via a tapered roller bearing 18.

Example 4

On the basis of the above structure, in the present embodiment, the respirator includes a sealing seat 7 and a sealing cover 8, the sealing seat 7 is fixedly installed at one end of the breathing passage communicating with the atmosphere in a manner that will occur to those skilled in the art, one end of the sealing seat extends out of the breathing passage and is provided with at least one air hole 19 penetrating inside and outside, and the sealing cover 8 is fixedly installed at one end of the sealing seat 7; an air passage 9 with two open ends and thick upper part and thin lower part is arranged in the sealing seat 7, and a sealing ball 10 is slidably and fixedly arranged in the thick part of the air passage 9; the sealing ball 10 is slid until it seals or opens the butt end of the gas duct 9. When the gas-liquid separator operates, the sealing ball 10 is pushed to slide by utilizing the pressure difference between the inside of the lubricating cavity and the atmosphere so as to open the port of the thick part of the gas channel 9, so that gas is released from the gas hole 19, and further the pressure is released, and the gas-liquid separator is convenient to use. Example 5

On the basis of the fourth embodiment, in the present embodiment, the sealing cover 10 is fixedly connected with the sealing ball cover through the elastic member 11. When the lubricating device operates, the sealing ball 10 is pushed to move by using the pressure difference between the inside of the lubricating cavity and the atmosphere, so that the sealing ball 10 opens the thick port of the air channel 9, the air is released by the air hole 19 so as to release the pressure, and the elastic element 11 is in a compressed state; after pressure release is finished, the pressure in the lubricating cavity is equal to the atmospheric pressure, and the sealing ball 10 returns under the action of the elastic force of the elastic part 11 to seal the thick part of the air passage 9, so that the use is convenient.

Preferably, in the present embodiment, the elastic member 11 is preferably a spring, and both ends of the spring are fixedly connected with the sealing cap 8 and the sealing ball 10, respectively, in a manner that will occur to those skilled in the art.

In addition, the air passage 9 is in a structure with a thick upper part and a thin lower part, the sealing ball 10 is arranged in the thick part at the upper part of the air passage 9 in a vertically sliding way, and the sealing ball 10 is slid vertically to seal or open the upper end of the thin part at the lower part of the air passage 9, so that the structure is simple and the design is reasonable.

Example 6

On the basis of the structure, the embodiment also relates to a wheel-side speed reducer, which comprises a sun wheel shaft 5 and the shell, wherein the sun wheel shaft 5 is horizontally and rotatably installed in one end of the steering knuckle shell 1, one end of the sun wheel shaft 5 extends into the wheel-side assembly and is in transmission connection with the wheel-side assembly through a transmission component, and the other end of the sun wheel shaft extends into the steering knuckle shell 1 and is used for being connected with a driving piece. When the transmission device runs, the driving piece drives the sun wheel shaft 5 to rotate, the sun wheel shaft 5 drives the wheel edge assembly to rotate by the transmission component, the transmission is convenient, and the transmission efficiency is high.

The driving member is made by the prior art, and the detailed structure and principle thereof are not described herein.

Example 7

On the basis of the sixth embodiment, in the present embodiment, the transmission assembly includes a gear ring assembly 12 and a plurality of planet gears 13, the gear ring assembly 12 is coaxially and fixedly sleeved outside one end of the sun gear shaft 5 and is fixedly connected with one end of the knuckle housing 1 through a bolt, and a spacer is arranged between the end of the bolt and the gear ring assembly 12; the plurality of planet gears 13 are uniformly distributed between the gear ring component 12 and one end of the sun gear shaft 5 at intervals along the circumferential direction of the sun gear shaft 5, and are respectively connected with the wheel edge assembly in a rotating way through the planet shafts 14, and the specific connection mode is as follows: the plurality of planet shafts 14 are fixedly connected with the wheel edge assembly, and the plurality of planet gears 13 are respectively sleeved on the planet shafts 14 in a rotating manner; one end of the sun wheel shaft 5 is in a gear shape and is respectively meshed with the plurality of planet gears 13; the sun wheel shaft 5 rotates to drive the plurality of planetary gears 13 to synchronously rotate so as to drive the wheel edge assembly to rotate. When the transmission device runs, the sun wheel shaft 5 rotates to drive the plurality of planetary gears 13 to synchronously rotate so as to drive the wheel edge assembly to rotate, the transmission is convenient, and the transmission efficiency is high.

Example 8

On the basis of the seventh embodiment, in the present embodiment, the hub assembly includes a hub 15 and a planetary carrier 16, the hub 15 is coaxially sleeved outside the sun gear shaft 5 and is rotatably connected with one end of the knuckle housing 1; the planet carrier 16 is sleeved outside one end of the sun gear shaft 5 and is fixedly connected with the hub 15 through a bolt, one end of each planet shaft 14 is in interference connection with the planet carrier 16, and each planet gear 13 is rotatably sleeved on the other end of the corresponding planet shaft 14, specifically: a pressing plate is fixed at the other end of the planet shaft 14 through a bolt, and the planet gear 13 is attached to the pressing plate to prevent the planet gear 13 and the planet shaft 14 from slipping; an oil port for lubricating oil to pass through is arranged on the planet carrier 16, and a screw plug 17 is detachably arranged at the oil port. When the planetary gear transmission device operates, the sun gear shaft 5 rotates to drive the plurality of planetary gears 13 to synchronously rotate so as to drive the planetary gear carrier 16 and the hub 15 to rotate, the transmission is convenient, and the transmission efficiency is high; in addition, lubricating oil passes through the oil port and gets in and out, and the oil port is sealed through plug screw 17, convenient to use.

In addition to the above embodiments, one end of the planetary shaft 14 may also be rotatably connected to the planetary carrier 16, and each planetary gear 13 is fixedly sleeved on the other end of the corresponding planetary shaft 14.

The principle of the power transmission is as follows: the sun gear shaft 5 rotates to drive the plurality of planetary gears 13 to rotate around the self axial direction, and meanwhile, the plurality of planetary gears 13 do circumferential motion along the gear ring component 12, so that the planetary shafts 14 are utilized to push the planetary carrier 16 to rotate.

Preferably, the oil port is fixedly provided with a mounting seat, and a sealing ring is arranged between the mounting seat and the oil port; be equipped with the lubricating oil passageway in the mount pad, the one end of lubricating oil passageway is equipped with the internal thread, is equipped with the external screw thread on the plug screw 17 to with the one end threaded connection of lubricating oil passageway, in order to seal the hydraulic fluid port.

Besides the above embodiments, the screw plug 17 can be replaced by a sealing plug, and the sealing plug is directly plugged at the oil port and tightly clamped in the oil port. In this scheme, when the pressure in the lubrication cavity constantly increases, the sealing plug easily slips with the hydraulic fluid port.

Example 9

On the basis of the structure, the embodiment also relates to a tractor which comprises the wheel side speed reducer, and a novel pressure discharge and lubricating oil backflow structure is designed, so that a channel which is connected with the outside atmosphere inside the wheel side speed reducer assembly is reasonably built, and oil leakage of an oil seal caused by temperature rise and internal air pressure increase in the running process of the wheel side speed reducer assembly can be avoided, so that the lubricating oil loss inside the cavity is reduced, and the service life of the oil seal is prolonged; meanwhile, the problem of breather oil channeling caused by overflow of lubricating oil along a ventilation channel due to the fact that lubricating oil in the conventional wheel-side speed reducer ventilation structure is influenced by centrifugal force in the rotating process of the tapered roller bearing is solved, so that the loss of the lubricating oil in the cavity is reduced, and the service life is prolonged.

The working principle of the utility model is as follows:

the transmission process of power in the assembly is as follows: power is input from the end part of the sun wheel shaft 5, is output to the wheel hub 15 through the planet wheel carrier 16 after being decelerated and torque-increased by the planetary gear transmission assembly, and is output to the tire, so that the vehicle is driven to move forward, and the traveling function of a front axle is realized;

the structure of the ventilation channel of the hub reduction assembly is as follows: the breathing channel is positioned in the steering knuckle shell 1 and is formed by intersecting four pore channels, two horizontal directions and two vertical directions, wherein the pore channel direction of the respirator forms a certain angle with the vertical direction according to the integral arrangement condition;

the air pressure balancing process of the hub reduction assembly comprises the following steps: when the air pressure in the lubricating cavity exceeds the opening pressure of the respirator, the respirator starts to work, the sealing ball 10 is pushed to move by utilizing the pressure difference between the interior of the wheel edge assembly and the atmosphere, so that the sealing ball 10 opens the thick port of the air passage 9, the air is released from the air hole 19, and the high-temperature and high-pressure air in the cavity is exhausted out of the cavity along the first passage 2 and the third passage 3 (shown as routes a-b in fig. 3) under the action of the pressure, so that the internal pressure is balanced, and the purpose of preventing oil leakage of an oil seal is achieved;

the oil liquid balancing process of the wheel edge speed reducing assembly is as follows: the tapered roller bearing 18 is influenced by centrifugal force in the rotating process, lubricating oil flows from the small end to the large end, then enters the channel I2, is influenced by viscosity of the lubricating oil and is accumulated in the horizontal section; when the air pressure in the cavity reaches the starting pressure of the respirator, the breathing channel is opened, and the lubricating oil flows back to the interior of the cavity of the hub reduction gear assembly along the channel three 4 and the channel four 6 (shown as a route a-c in figure 3) under the influence of the air pressure and gravity, so that the lubricating oil is prevented from overflowing along the respirator, and the purpose of preventing the respirator from oil channeling is achieved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A shell with a breathing function is characterized in that: the steering knuckle assembly comprises a steering knuckle shell (1) and a wheel side assembly, wherein the wheel side assembly is horizontally and rotatably arranged, and a lubricating cavity for lubricating oil to flow is formed in the wheel side assembly; a connecting port communicated with the lubricating cavity is formed in one end of the wheel side assembly, and one end of the steering knuckle shell (1) is rotatably connected with the connecting port; and a breathing channel is arranged on the side wall of one end of the steering knuckle shell (1), two ends of the breathing channel are respectively communicated with the lubricating cavity and the atmosphere, and a respirator is arranged at one end of the breathing channel communicated with the atmosphere.

2. The respiratory-function housing of claim 1, wherein: the breathing passage comprises a first passage (2) and a second passage (3), the first passage (2) is horizontally arranged, and one end of the first passage is communicated with the lubricating cavity; one end of the second channel (3) is communicated with the other end of the first channel (2), the other end of the second channel extends upwards to be communicated with the atmosphere, and the respirator is installed at the other end of the second channel (3).

3. The respiratory-function housing of claim 2, wherein: the breathing passage further comprises a third passage (4) which is horizontally arranged, and two ends of the third passage (4) are respectively communicated with the lubricating cavity and one end of the second passage (3).

4. A respiratory-function housing according to claim 3, wherein: a mounting hole for mounting a sun gear shaft (5) is horizontally formed in the center of one end of the steering knuckle shell (1), and two ends of the mounting hole are respectively communicated with the lubricating cavity and the interior of the steering knuckle shell (1); the breathing passage further comprises a fourth passage (6), the fourth passage (6) is vertically arranged, and two ends of the fourth passage (6) are communicated with the mounting hole and the third passage (4) respectively.

5. A respiratory-function housing according to any one of claims 1 to 4, wherein: the respirator comprises a sealing seat (7) and a sealing cover (8), the sealing seat (7) is fixedly installed at one end of the breathing passage communicated with the atmosphere, one end of the sealing seat extends out of the breathing passage and is provided with at least one air hole (19) which penetrates through the inside and the outside, and the sealing cover (8) is fixedly installed at one end of the sealing seat (7); an air passage (9) with two open ends and thick upper part and thin lower part is arranged in the sealing seat (7), and a sealing ball (10) is slidably and fixedly arranged in the thick part of the air passage (9); sliding the sealing ball (10) until it seals or opens the butt end of the air passage (9).

6. The respiratory-function housing of claim 5, wherein: the sealing ball (10) is fixedly connected with the sealing cover (8) through an elastic piece (11).

7. A hub reduction gear, its characterized in that: comprising a sun gear shaft (5) and a housing according to any one of claims 1 to 6, the sun gear shaft (5) being mounted horizontally rotatably in one end of the knuckle housing (1), one end of which extends into the wheel-rim assembly and is in driving connection with the wheel-rim assembly via a drive element, and the other end of which extends into the knuckle housing (1) for connection with a drive element.

8. The hub reduction gear according to claim 7, characterized in that: the transmission assembly comprises a gear ring assembly (12) and a plurality of planet gears (13), the gear ring assembly (12) is coaxially and fixedly sleeved outside one end of the sun gear shaft (5) and is fixedly connected with one end of the steering knuckle shell (1); the planetary gears (13) are uniformly distributed between the gear ring component (12) and one end of the sun gear shaft (5) at intervals along the circumferential direction of the sun gear shaft (5), and are respectively in rotating connection with the wheel edge assembly through planetary shafts (14); one end of the sun wheel shaft (5) is in a gear shape and is respectively meshed with the plurality of planet gears (13); the sun wheel shaft (5) rotates to drive the plurality of planetary gears (13) to synchronously rotate so as to drive the wheel edge assembly to rotate.

9. The hub reduction gear according to claim 8, characterized in that: the hub assembly comprises a hub (15) and a planet carrier (16), the hub (15) is coaxially sleeved outside the sun wheel shaft (5) and is rotatably connected with one end of the steering knuckle shell (1); the planet wheel carrier (16) is sleeved outside one end of the sun wheel shaft (5) and is fixedly connected with the wheel hub (15), one end of each planet shaft (14) is fixedly connected with the planet wheel carrier (16), and the other end of each planet shaft is rotatably connected with the corresponding planet gear (13); an oil port for lubricating oil to pass through is arranged on the planet wheel carrier (16), and a screw plug (17) is detachably mounted at the oil port.

10. A tractor, its characterized in that: comprising a wheel hub reduction unit according to any one of claims 1 to 9.

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