CN221075144U - Gearbox semi-axis seal structure and crawler for paddy field - Google Patents

Abstract

The utility model provides a half shaft sealing structure of a gearbox and a crawler machine for paddy fields. The utility model provides a gearbox semi-axis seal structure, the gear seat, first antifriction bearing, the skeleton oil blanket, the semi-axis bridge pipe, the second antifriction bearing, the O type circle, the semi-axis end cover, floating oil blanket seat circle, floating oil blanket and functional unit all overlap and establish on the semi-axis, the gear seat is located the one end of semi-axis, first antifriction bearing and second antifriction bearing install respectively at the both ends of semi-axis bridge pipe, the skeleton oil blanket is located the one end of semi-axis bridge pipe, first antifriction bearing is located between gear seat and the skeleton oil blanket, the other end at the semi-axis bridge pipe is installed to the semi-axis end cover, the second antifriction bearing is located between semi-axis end cover and the semi-axis bridge pipe, floating oil blanket seat circle passes through the other end of O type circle installation at the semi-axis, floating oil blanket seat circle and the adjacent setting of semi-axis end cover, floating oil blanket is located between floating oil blanket seat circle and the semi-axis end cover, the other end at the semi-axis end of semi-axis is installed to functional unit.

Description

Gearbox semi-axis seal structure and crawler for paddy field

Technical Field

The utility model relates to the technical field of gearbox sealing, in particular to a half shaft sealing structure of a gearbox and a crawler machine for paddy fields.

Background

Because the crawler combine harvester needs to harvest in a muddy water environment, a sealing element at the output part of the half shaft is positioned in slurry containing fine particles, the particles in the slurry serve as abrasive particles, and under the rotation action of the half shaft, the oil seal and the oil seal matching position are worn, so that the sealing is not tight, the leakage condition is caused, and the gearbox is in lubricating oil deficiency, half shaft sintering and other faults of the gearbox; at present, a paddy field sealing structure at the output position (driving wheel position) of a gear box of a crawler machine adopts a framework oil seal multi-layer design and a compound oil seal design, but still cannot meet the requirement that mud water cannot enter 1000 hours when the paddy field works.

Disclosure of utility model

The utility model aims to solve the technical problem of overcoming the defects of the prior art and provides a half shaft sealing structure of a gearbox and a crawler machine for a paddy field.

The technical scheme for solving the technical problems is as follows: a gearbox half shaft sealing structure comprising: the gear seat, first antifriction bearing, skeleton oil blanket, semi-axis bridge pipe, semi-axis, second antifriction bearing, O type circle, semi-axis end cover, floating oil blanket seat circle, floating oil blanket, functional part, the gear seat first antifriction bearing the skeleton oil blanket the semi-axis bridge pipe the second antifriction bearing the O type circle the semi-axis end cover the floating oil blanket seat circle the floating oil blanket and the functional part all overlap and establish on the semi-axis, the gear seat is located the one end of semi-axis, first antifriction bearing and the second antifriction bearing are installed respectively the both ends of semi-axis bridge pipe, the skeleton oil blanket is located the one end of semi-axis bridge pipe, first antifriction bearing is located the gear seat with between the skeleton oil blanket, the semi-axis end cover is installed the other end of semi-axis bridge pipe, the second antifriction bearing is located the semi-axis end cover with between the semi-axis end cover, floating oil blanket seat circle is passed through the O type circle is installed the other end of semi-axis, floating oil blanket seat circle with the semi-axis end cover is located adjacent to the setting is in between the semi-axis end cover and the functional part.

The technical scheme of the utility model has the beneficial effects that: the skeleton oil seal is matched with the half shaft to form a dynamic sealing structure on the left side of the half shaft assembly, so that oil is prevented from flowing out through the position of the skeleton oil seal. The O-shaped ring is arranged between the floating oil seal seat ring and the half shaft, the floating oil seal seat ring and the half shaft are relatively static, and a static sealing structure between the half shaft and the floating oil seal seat ring is formed through extrusion deformation of the O-shaped ring, so that oil is prevented from flowing out through a gap between the half shaft and the floating oil seal seat ring. The floating oil seal forms a dynamic sealing structure. The half shaft sealing structure of the gearbox adopts an independent sealing structure, is an independent lubrication environment, is not communicated with the lubrication environment in the gearbox, and prevents oil leakage of the gearbox body. Through the organic combination and the structural improvement of skeleton oil blanket, O type circle and floating oil blanket, solve the industry difficult problem that crawler combine semi-axis oil blanket sealed effect is poor, life-span is low, solve the semi-axis oil blanket oil leak lubricating oil and lack the gearbox trouble such as the semi-axis bearing damage, semi-axis sintering, semi-axis axle tube damage that cause.

Further, the floating oil seal includes: the novel floating oil seal comprises a first metal ring, a first rubber sealing ring, a second metal ring and a second rubber sealing ring, wherein the first metal ring and the first rubber sealing ring are all installed on an axle end cover, the second metal ring and the second rubber sealing ring are all installed on a floating oil seal seat ring, and the first metal ring is in butt joint with the second metal ring.

The beneficial effects of adopting the further technical scheme are as follows: the first metal ring and the first rubber sealing ring are arranged on the half shaft end cover and are static metal rings; the second metal ring and the second rubber sealing ring are arranged on the floating oil seal seat ring and rotate together with the half shaft to form a rotary metal ring. And the static metal ring is attached to the rotary metal ring to form a dynamic sealing structure. Compared with a framework oil seal structure and a combined seal structure, the floating oil seal structure has the advantages that the sealing position is changed from the rotation fit of rubber and steel into the fit of precisely contacted steel surfaces and steel surfaces, the service life is longer in a slurry operation environment containing fine particles, the muddy water prevention effect is better, and the price of parts is lower.

Further, an annular protrusion is arranged on one side of the half-shaft end cover adjacent to the floating oil seal seat ring, an annular groove matched with the annular protrusion is arranged on one side of the floating oil seal seat ring adjacent to the half-shaft end cover, the annular protrusion is rotatably arranged in the annular groove, the annular protrusion is positioned on the outer peripheral side of the floating oil seal, or an annular groove is arranged on one side of the half-shaft end cover adjacent to the floating oil seal seat ring, an annular protrusion matched with the annular groove is arranged on one side of the floating oil seal seat ring adjacent to the half-shaft end cover, and the annular protrusion is rotatably arranged in the annular groove, and the annular groove is positioned on the outer peripheral side of the floating oil seal.

The beneficial effects of adopting the further technical scheme are as follows: the annular bulge of the half shaft end cover is embedded with the annular groove of the floating oil seal seat ring to form a narrow gap to form a labyrinth sealing structure, so that weed strings and large particulate matters are prevented from entering the precise sealing surface of the floating oil seal.

Further, the axial section of the floating oil seal seat ring is L-shaped, the half-shaft end cover and the floating oil seal are sleeved on the outer side of the floating oil seal seat ring, and the functional part is a track driving wheel.

The beneficial effects of adopting the further technical scheme are as follows: the structural design of the floating oil seal seat ring, the half shaft end cover and the floating oil seal improves the rotation stability and reliability and improves the sealing performance.

Further, the half-axle end cover is installed at the other end of the half-axle tube through an inner hexagonal screw and a spring gasket, the spring gasket is sleeved on the inner hexagonal screw, and sealing glue is arranged between the half-axle end cover and the half-axle tube.

The beneficial effects of adopting the further technical scheme are as follows: the axle shaft end cover is arranged on the axle tube of the axle shaft through an inner hexagon screw and a spring washer, and the joint surface of the inner hexagon screw and the spring washer is subjected to glue spraying treatment to form a static sealing structure.

Further, a pair of sliding bearings are arranged in the axle tube, the pair of sliding bearings are located between the first rolling bearing and the second rolling bearing, and the pair of sliding bearings are sleeved on the axle.

The beneficial effects of adopting the further technical scheme are as follows: the first rolling bearing and the second rolling bearing are arranged on the axle tube of the half axle and are matched with the axle journal of the roller bearing of the half axle to be used as a main rotary supporting structure of the half axle; the sliding bearing is arranged on the axle tube of the half axle and matched with the half axle to serve as an auxiliary rotary supporting structure of the half axle; under normal operating condition, main rotation bearing structure is functional, and auxiliary rotation bearing structure does not play the supporting role, when because of other causes lead to antifriction bearing to damage, antifriction bearing loses the supporting role, and auxiliary rotation support plays the supporting role at this moment, prevents that the semi-axis from eccentric other spare parts of leading to damage.

Further, one end of the half shaft is provided with a radial groove, a clamp spring is arranged in the radial groove, the clamp spring is in butt joint with the gear seat, a slotted nut and a pressing plate are arranged at the other end of the half shaft, the pressing plate is in butt joint with the functional part, and the slotted nut is in butt joint with the pressing plate.

The beneficial effects of adopting the further technical scheme are as follows: the snap springs are embedded into radial grooves of the half shafts, so that parts on the shafts are prevented from moving rightwards; the slotted nut is screwed with the threaded end of the half shaft and is pressed on the pressing plate to prevent the parts on the shaft from moving leftwards.

Further, the other end of the half shaft is provided with a threaded end and a radial hole, the slotted nut is installed at the threaded end, the slotted nut is provided with a cotter pin, and one end of the cotter pin penetrates through the slotted nut and is inserted into the radial hole.

The beneficial effects of adopting the further technical scheme are as follows: the cotter pin penetrates into the radial hole at the thread of the half shaft to prevent the slotted nut from loosening.

Further, the axle tube is provided with an oil filling hole, an air vent and an oil drain hole, the oil filling hole, the air vent and the oil drain hole are respectively provided with a hexagonal head screw plug and a combined sealing gasket, the combined sealing gasket is sleeved on the hexagonal head screw plug, the oil filling hole and the air vent are both positioned at the top of the axle tube, and the oil drain hole is positioned at the bottom of the axle tube.

The beneficial effects of adopting the further technical scheme are as follows: and filling a prescribed amount of lubricating oil into the airtight sealed cavity through the filling oil hole to form a sealed lubricating part.

In addition, the utility model also provides a crawler machine for paddy fields, which comprises the half shaft sealing structure of the gearbox.

Additional aspects of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural diagram of a half shaft sealing structure of a gearbox according to an embodiment of the present utility model.

Fig. 2 is an enlarged view of a portion of the structure shown in fig. 1 at a.

Fig. 3 is a partial enlarged view of the structure shown in fig. 2 at B.

Fig. 4 is an enlarged view of a portion of the structure shown in fig. 2 at C.

Reference numerals illustrate: 1. clamping springs; 2. a gear seat; 3. a first rolling bearing; 4. a framework oil seal; 5. a slotted nut; 6. a hexagonal head screw plug; 7. a combined sealing gasket; 8. a half axle tube; 81. filling an oil filling hole; 82. a vent hole; 83. an oil drain hole; 9. a half shaft; 10. a second rolling bearing; 11. an O-ring; 12. a half axle end cover; 121. an annular protrusion; 13. a floating oil seal retainer; 131. an annular groove; 14. a floating oil seal; 141. a first metal ring; 142. a first rubber seal ring; 143. a second metal ring; 144. a second rubber seal ring; 15. an inner hexagon screw; 16. a spring washer; 17. a functional component; 18. a pressing plate; 19. a sliding bearing; 20. and (5) a cotter pin.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the illustrated embodiments are provided for illustration only and are not intended to limit the scope of the present utility model.

As shown in fig. 1 to 4, an embodiment of the present utility model provides a half shaft sealing structure of a gearbox, including: the gear seat 2, the first rolling bearing 3, the framework oil seal 4, the axle tube 8, the axle shaft 9, the second rolling bearing 10, the O-shaped ring 11, the axle end cover 12, the floating oil seal seat ring 13, the floating oil seal 14 and the functional component 17, wherein the gear seat 2, the first rolling bearing 3, the framework oil seal 4, the axle tube 8, the second rolling bearing 10, the O-shaped ring 11, the axle end cover 12, the floating oil seal seat ring 13, the floating oil seal 14 and the functional component 17 are all sleeved on the axle shaft 9, the gear seat 2 is positioned at one end of the axle shaft 9, the first rolling bearing 3 and the second rolling bearing 10 are respectively arranged at two ends of the axle tube 8, the framework oil seal 4 is positioned at one end of the axle tube 8, the first rolling bearing 3 is positioned between the axle seat 2 and the framework oil seal 4, the axle end cover 12 is arranged at the other end of the axle tube 8, the second rolling bearing 10 is positioned between the axle tube 12 and the axle shaft end cover 9, the floating oil seal seat ring 13 is arranged at the other end of the axle shaft end cover 12 and the axle shaft end cover 9, the floating oil seal seat ring 13 is arranged at the other end of the end cover 12, and the functional component is arranged between the axle shaft end cover 13 and the axle shaft end cover 9.

The technical scheme of the utility model has the beneficial effects that: the skeleton oil seal is matched with the half shaft to form a dynamic sealing structure on the left side of the half shaft assembly, so that oil is prevented from flowing out through the position of the skeleton oil seal. The O-shaped ring is arranged between the floating oil seal seat ring and the half shaft, the floating oil seal seat ring and the half shaft are relatively static, and a static sealing structure between the half shaft and the floating oil seal seat ring is formed through extrusion deformation of the O-shaped ring, so that oil is prevented from flowing out through a gap between the half shaft and the floating oil seal seat ring. The floating oil seal forms a dynamic sealing structure. The half shaft sealing structure of the gearbox adopts an independent sealing structure, is an independent lubrication environment, is not communicated with the lubrication environment in the gearbox, and prevents oil leakage of the gearbox body. Through the organic combination and the structural improvement of skeleton oil blanket, O type circle and floating oil blanket, solve the industry difficult problem that crawler combine semi-axis oil blanket sealed effect is poor, life-span is low, solve the semi-axis oil blanket oil leak lubricating oil and lack the gearbox trouble such as the semi-axis bearing damage, semi-axis sintering, semi-axis axle tube damage that cause.

As shown in fig. 1 to 4, further, the floating oil seal 14 includes: the first metal ring 141, the first rubber seal ring 142, the second metal ring 143 and the second rubber seal ring 144, wherein the first metal ring 141 and the first rubber seal ring 142 are all mounted on the axle end cover 12, the second metal ring 143 and the second rubber seal ring 144 are all mounted on the floating oil seal race 13, and the first metal ring 141 is abutted with the second metal ring 143.

The beneficial effects of adopting the further technical scheme are as follows: the first metal ring and the first rubber sealing ring are arranged on the half shaft end cover and are static metal rings; the second metal ring and the second rubber sealing ring are arranged on the floating oil seal seat ring and rotate together with the half shaft to form a rotary metal ring. And the static metal ring is attached to the rotary metal ring to form a dynamic sealing structure. Compared with a framework oil seal structure and a combined seal structure, the floating oil seal structure has the advantages that the sealing position is changed from the rotation fit of rubber and steel into the fit of precisely contacted steel surfaces and steel surfaces, the service life is longer in a slurry operation environment containing fine particles, the muddy water prevention effect is better, and the price of parts is lower.

The axial section of the first metal ring and the second metal ring can be L-shaped. The first rubber sealing ring can be sleeved outside the first metal ring according to actual needs, the second rubber sealing ring can be sleeved outside the second metal ring, or the first metal ring is sleeved outside the first rubber sealing ring, and the second metal ring is sleeved outside the second rubber sealing ring.

As shown in fig. 1 to 4, further, an annular protrusion 121 is provided on a side of the side end cover 12 adjacent to the floating oil seal retainer 13, an annular groove 131 adapted to the annular protrusion 121 is provided on a side of the floating oil seal retainer 13 adjacent to the side end cover 12, the annular protrusion 121 is rotatably mounted in the annular groove 131, the annular protrusion 121 is located on an outer peripheral side of the floating oil seal 14, or an annular groove is provided on a side of the side end cover adjacent to the floating oil seal retainer, an annular protrusion adapted to the annular groove is provided on a side of the floating oil seal retainer adjacent to the side end cover, and the annular protrusion is rotatably mounted in the annular groove, and the annular groove is located on an outer peripheral side of the floating oil seal.

The beneficial effects of adopting the further technical scheme are as follows: the annular bulge of the half shaft end cover is embedded with the annular groove of the floating oil seal seat ring to form a narrow gap to form a labyrinth sealing structure, so that weed strings and large particulate matters are prevented from entering the precise sealing surface of the floating oil seal.

As shown in fig. 1 to 4, further, the floating oil seal race 13 has an L-shaped axial section, the axle end cover 12 and the floating oil seal 14 are both sleeved on the outer side of the floating oil seal race 13, and the functional component 17 is a track driving wheel.

The beneficial effects of adopting the further technical scheme are as follows: the structural design of the floating oil seal seat ring, the half shaft end cover and the floating oil seal improves the rotation stability and reliability and improves the sealing performance.

As shown in fig. 1 to 4, further, the axle end cover 12 is mounted at the other end of the axle tube 8 through an inner hexagon screw 15 and a spring washer 16, the spring washer 16 is sleeved on the inner hexagon screw 15, and a sealant is arranged between the axle end cover 12 and the axle tube 8.

The beneficial effects of adopting the further technical scheme are as follows: the axle shaft end cover is arranged on the axle tube of the axle shaft through an inner hexagon screw and a spring washer, and the joint surface of the inner hexagon screw and the spring washer is subjected to glue spraying treatment to form a static sealing structure.

As shown in fig. 1 to 4, further, a pair of sliding bearings 19 is provided in the axle tube 8, the pair of sliding bearings 19 is located between the first rolling bearing 3 and the second rolling bearing 10, and the pair of sliding bearings 19 is sleeved on the axle shaft 9.

The beneficial effects of adopting the further technical scheme are as follows: the first rolling bearing and the second rolling bearing are arranged on the axle tube of the half axle and are matched with the axle journal of the roller bearing of the half axle to be used as a main rotary supporting structure of the half axle; the sliding bearing is arranged on the axle tube of the half axle and matched with the half axle to serve as an auxiliary rotary supporting structure of the half axle; under normal operating condition, main rotation bearing structure is functional, and auxiliary rotation bearing structure does not play the supporting role, when because of other causes lead to antifriction bearing to damage, antifriction bearing loses the supporting role, and auxiliary rotation support plays the supporting role at this moment, prevents that the semi-axis from eccentric other spare parts of leading to damage.

In muddy water environment, the half shaft sealing structure (gearbox half shaft sealing structure) is inevitably damaged, and the gearbox half shaft sealing structure adopts an independent sealing structure, so that the sealing structure is an independent lubricating environment and is not communicated with the lubricating environment in the gearbox, and oil leakage of the gearbox body is prevented; even if the total loss of lubricating oil occurs, the rolling bearing fails, and the sliding bearing acts to prevent the damage of the bearing, the eccentric damage of the shaft and other parts.

As shown in fig. 1 to 4, further, one end of the half shaft 9 is provided with a radial groove, a clamp spring 1 is arranged in the radial groove, the clamp spring 1 is abutted against the gear seat 2, a slotted nut 5 and a pressing plate 18 are mounted at the other end of the half shaft 9, the pressing plate 18 is abutted against the functional component 17, and the slotted nut 5 is abutted against the pressing plate 18.

The beneficial effects of adopting the further technical scheme are as follows: the snap springs are embedded into radial grooves of the half shafts, so that parts on the shafts are prevented from moving rightwards; the slotted nut is screwed with the threaded end of the half shaft and is pressed on the pressing plate to prevent the parts on the shaft from moving leftwards.

As shown in fig. 1 to 4, further, the other end of the half shaft 9 is provided with a threaded end and a radial hole, the slotted nut 5 is mounted on the threaded end, the slotted nut 5 is provided with a cotter pin 20, and one end of the cotter pin 20 penetrates through the slotted nut 5 and is inserted into the radial hole.

The beneficial effects of adopting the further technical scheme are as follows: the cotter pin penetrates into the radial hole at the thread of the half shaft to prevent the slotted nut from loosening.

As shown in fig. 1 to 4, further, the axle tube 8 is provided with an oil filling hole 81, a vent hole 82 and an oil drain hole 83, the oil filling hole 81, the vent hole 82 and the oil drain hole 83 are respectively provided with a hexagonal head screw plug 6 and a combined sealing washer 7, the combined sealing washer 7 is sleeved on the hexagonal head screw plug 6, the oil filling hole 81 and the vent hole 82 are both positioned at the top of the axle tube 8, and the oil drain hole 83 is positioned at the bottom of the axle tube 8.

The beneficial effects of adopting the further technical scheme are as follows: and filling a prescribed amount of lubricating oil into the airtight sealed cavity through the filling oil hole to form a sealed lubricating part.

The half shaft sealing structure of the gearbox provided by the embodiment of the utility model can be applied to a half shaft sealing structure which needs to drive other parts in a paddy field working environment, and solves the industrial problems of poor sealing effect and low service life of a half shaft oil seal of a crawler combine harvester (a crawler for a paddy field), and the faults of the gearbox such as half shaft bearing damage, half shaft sintering, bridge pipe damage and the like caused by the lack of oil leakage and lubricating oil of the half shaft oil seal through the organic combination of a labyrinth sealing structure, a floating oil seal structure, a lubricating oil sleeve supporting structure and an independent sealing structure.

The half shaft sealing structure of the gearbox can be a rotating shaft structure, and the function is to transmit the rotating motion and power in the gearbox to the functional component 17 (the functional component can be a crawler belt driving wheel) through the half shaft 9, the power and the motion are transmitted to the half shaft 9 through the gear seat 2, the driving wheel of the functional component 17 is driven to rotate through a spline structure, and the crawler belt or other components are driven to realize the driving function.

According to the structural features, it can be divided into the following parts:

(1) Sealing the lubrication portion;

(2) A rotation support portion;

(3) Functional structural parts.

1. Sealing and lubricating part:

The framework oil seal 4 is arranged on the axle tube 8 of the half axle and is matched with the grinding journal of the half axle 9 to form a dynamic sealing structure on the left side of the half axle assembly, so that oil is prevented from flowing out through the position of the framework oil seal 4; the O-shaped ring 11 is arranged between the floating oil seal seat ring 13 and the half shaft 9, the floating oil seal seat ring 13 and the half shaft 9 are relatively static, and a static sealing structure between the half shaft 9 and the floating oil seal seat ring 13 is formed through extrusion deformation of the O-shaped ring 11, so that oil is prevented from flowing out through a gap between the half shaft 9 and the floating oil seal seat ring 13; the floating oil seal 14 is composed of 2 floating metal rings (a first metal ring and a second metal ring, hereinafter referred to as metal rings) and 2 rubber sealing rings (a first rubber sealing ring and a second rubber sealing ring), one side metal ring and the same side rubber sealing ring form a group, the left side metal ring (the first metal ring) and the rubber sealing ring (the first rubber sealing ring) are installed on the half shaft end cover 12 and are static metal rings, and the right side metal ring (the second metal ring) and the rubber sealing ring (the second rubber sealing ring) are installed on the floating oil seal seat ring 13 and rotate together with the half shaft 9 and are rotary metal rings; the static metal ring is attached to the rotary metal ring to form a dynamic sealing structure; the protruding part (annular protrusion) of the half shaft end cover 12 is embedded with the recessed part (annular groove) of the floating oil seal seat ring 13 to form a narrow gap, so as to form a labyrinth sealing structure, and prevent weed strings and large particulate matters from entering the precise sealing surface of the floating oil seal 14; the axle shaft end cover 12 is arranged on the axle tube 8 through a fastener inner hexagon screw 15 and a standard spring washer (spring washer 16), and the joint surface of the two is subjected to glue spraying treatment to form a static sealing structure.

The dynamic sealing structure and the static sealing structure form a sealed cavity, the hexagonal head screw plug 6 and the combined sealing gasket 7 are arranged at three positions in total, the upper end is an oil filling plug (hexagonal head screw plug at an oil filling hole) and a ventilation plug (hexagonal head screw plug at an air vent hole), and the lower end is an oil drain plug (hexagonal head screw plug at an oil drain hole); the system (a half shaft sealing structure of the gearbox) is formed by filling a specified dosage of lubricating oil into a closed sealing cavity through a filling plug hole (a hexagonal head screw plug at a filling oil hole).

2. A rotation support portion:

The first rolling bearing 3 and the second rolling bearing 10 are arranged on the axle tube 8 and are matched with the roller bearing journal of the axle shaft 9 to serve as a main rotary supporting structure of the axle shaft 9; the sliding bearings 19 (two positions) are arranged on the axle tube 8 and are matched with the sliding bearing journals of the axle shafts 9 to serve as auxiliary rotation supporting structures of the axle shafts 9; the whole system (gearbox half shaft sealing structure) is under normal operating condition, and main rotation bearing structure is functional, and auxiliary rotation bearing structure does not play a supporting role, when because of other causes lead to antifriction bearing to damage, antifriction bearing loses the supporting role, and auxiliary rotation support plays supporting role at this moment, prevents semi-axis 9 eccentric, causes the damage to other spare part.

3. Functional structural part

The clamp spring 1 is embedded into a radial groove of the half shaft 9, so that parts on the shaft are prevented from moving rightwards; the slotted nut 5 is screwed with the threaded end of the half shaft 9 and is pressed on the pressing plate 18 to prevent the parts on the shaft from moving leftwards; cotter pin 20 penetrates into radial hole at the thread of half shaft 9 to prevent the loosening of slotted nut 5.

In addition, the utility model also provides a crawler machine for paddy fields, which comprises the half shaft sealing structure of the gearbox.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A gearbox half shaft sealing structure, characterized by comprising: the gear seat, first antifriction bearing, skeleton oil blanket, semi-axis bridge pipe, semi-axis, second antifriction bearing, O type circle, semi-axis end cover, floating oil blanket seat circle, floating oil blanket, functional part, the gear seat first antifriction bearing the skeleton oil blanket the semi-axis bridge pipe the second antifriction bearing the O type circle the semi-axis end cover the floating oil blanket seat circle the floating oil blanket and the functional part all overlap and establish on the semi-axis, the gear seat is located the one end of semi-axis, first antifriction bearing and the second antifriction bearing are installed respectively the both ends of semi-axis bridge pipe, the skeleton oil blanket is located the one end of semi-axis bridge pipe, first antifriction bearing is located the gear seat with between the skeleton oil blanket, the semi-axis end cover is installed the other end of semi-axis bridge pipe, the second antifriction bearing is located the semi-axis end cover with between the semi-axis end cover, floating oil blanket seat circle is passed through the O type circle is installed the other end of semi-axis, floating oil blanket seat circle with the semi-axis end cover is located adjacent to the setting is in between the semi-axis end cover and the functional part.

2. The transmission half shaft sealing structure according to claim 1, wherein the floating oil seal comprises: the novel floating oil seal comprises a first metal ring, a first rubber sealing ring, a second metal ring and a second rubber sealing ring, wherein the first metal ring and the first rubber sealing ring are all installed on an axle end cover, the second metal ring and the second rubber sealing ring are all installed on a floating oil seal seat ring, and the first metal ring is in butt joint with the second metal ring.

3. The half shaft sealing structure of a gearbox according to claim 1, wherein an annular protrusion is arranged on one side of the half shaft end cover adjacent to the floating oil seal retainer, an annular groove matched with the annular protrusion is arranged on one side of the floating oil seal retainer adjacent to the half shaft end cover, the annular protrusion is rotatably arranged in the annular groove, the annular protrusion is located on the outer peripheral side of the floating oil seal, or an annular groove is arranged on one side of the half shaft end cover adjacent to the floating oil seal retainer, an annular protrusion matched with the annular groove is arranged on one side of the floating oil seal retainer adjacent to the half shaft end cover, the annular protrusion is rotatably arranged in the annular groove, and the annular groove is located on the outer peripheral side of the floating oil seal.

4. The axle shaft seal structure of a transmission of claim 1, wherein the axial section of the floating oil seal retainer is L-shaped, the axle shaft end cover and the floating oil seal are both sleeved on the outer side of the floating oil seal retainer, and the functional component is a track driving wheel.

5. The half shaft sealing structure of a gearbox according to claim 1, wherein the half shaft end cover is mounted at the other end of the half shaft tube through an inner hexagonal screw and a spring washer, the spring washer is sleeved on the inner hexagonal screw, and sealing glue is arranged between the half shaft end cover and the half shaft tube.

6. The axle housing axle seal arrangement of claim 1 wherein said axle housing tube has a pair of slide bearings disposed therein, said pair of slide bearings being positioned between said first and second rolling bearings, said pair of slide bearings being sleeved on said axle housing.

7. The gearbox half shaft sealing structure according to claim 1, wherein one end of the half shaft is provided with a radial groove, a clamp spring is arranged in the radial groove, the clamp spring is abutted to the gear seat, a slotted nut and a pressing plate are arranged at the other end of the half shaft, the pressing plate is abutted to the functional component, and the slotted nut is abutted to the pressing plate.

8. The transmission half shaft sealing structure according to claim 7, wherein the other end of the half shaft is provided with a threaded end and a radial hole, the slotted nut is mounted on the threaded end, the slotted nut is provided with a cotter pin, and one end of the cotter pin penetrates through the slotted nut and is inserted into the radial hole.

9. The half-shaft sealing structure of a gearbox according to claim 1, wherein the half-shaft bridge pipe is provided with an oil filling hole, an air vent hole and an oil drain hole, a hexagonal head screw plug and a combined sealing gasket are respectively arranged in the oil filling hole, the air vent hole and the oil drain hole, the combined sealing gasket is sleeved on the hexagonal head screw plug, the oil filling hole and the air vent hole are both positioned at the top of the half-shaft bridge pipe, and the oil drain hole is positioned at the bottom of the half-shaft bridge pipe.

10. A crawler belt machine for paddy fields, characterized by comprising a half shaft sealing structure of a gearbox according to any one of the above claims 1 to 9.