CN216519467U - Electro-hydraulic control wet differential lock for tractor - Google Patents
Electro-hydraulic control wet differential lock for tractor Download PDFInfo
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- CN216519467U CN216519467U CN202123397446.7U CN202123397446U CN216519467U CN 216519467 U CN216519467 U CN 216519467U CN 202123397446 U CN202123397446 U CN 202123397446U CN 216519467 U CN216519467 U CN 216519467U
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Abstract
The utility model relates to an electro-hydraulic control wet differential lock for a tractor, which belongs to the technical field of agricultural machinery and comprises a rear box body, bolts, pins, steel sheets, a differential cover, friction plates, a differential shell, a half axle gear, a differential lock piston, a differential lock oil pipe, a differential bearing seat and a sealing ring, wherein the rear box body is provided with a plurality of through holes; the differential case and the differential cover are connected through bolts; the steel sheet is connected with the differential shell and the differential cover through pins; the friction plate is connected with the half axle gear through a spline; the differential lock piston is arranged in a piston cavity of the differential mechanism shell; one end of the differential lock oil pipe is arranged on the rear box body, and the other end of the differential lock oil pipe is arranged on a differential bearing seat; the seal ring is mounted on the differential housing. The differential lock is reliable in use, convenient to install and simple and compact in structure, and can meet the use requirement of a high-power tractor.
Description
Technical Field
The utility model belongs to the technical field of agricultural machinery, and particularly relates to an electro-hydraulic control wet differential lock for a tractor.
Background
At present, on various models of wheeled tractors produced in China, a mechanical differential lock and a hydraulic differential lock are commonly adopted as a differential lock structure. When the mechanical differential lock is operated, the tractor must be stopped firstly, and a driver operates the mechanical differential lock by feet, so that the operation efficiency is influenced while the operation comfort is poor, and the mechanical differential lock is widely applied to products of small and medium-power tractors. The hydraulic differential lock utilizes hydraulic oil to push the piston to press the wet friction plate and the steel sheet tightly, so as to achieve the purpose of locking the differential mechanism. The driver can realize the combination and the separation of the differential lock by operating the button with hands, the electro-hydraulic control is realized, the operation comfort is better, the tractor does not need to stop during the operation, the operation efficiency is improved, and the differential lock is widely applied to products of high-power tractors.
Because the electro-hydraulic control hydraulic differential lock has the advantages of good operation comfort and high working efficiency of the whole tractor, the electro-hydraulic control wet differential lock for the tractor is also rapidly developed and applied, and the existing commonly used wet differential lock has the following structure:
the utility model discloses a "novel tractor wet-type differential lock structure and tractor" (application number: 201720880380.1, application date: 2017.07.18) utility model patent, differential lock piston passes through O type sealing washer seal in the piston chamber, and friction disc subassembly nestification is directly between differential side gear and differential end cover. When the differential lock works, hydraulic oil is introduced into the piston cavity to push the piston, so that the friction plate assembly and the end cover are pressed together, and locking of the differential is realized.
A novel hydraulic differential lock type differential (application No. 201921989054, X, application date: 2019.11.18) is a novel utility model patent, a differential lock piston is sealed in a piston cavity through an O-shaped sealing ring, a left gear of the differential is connected with a friction plate through a spline, and a right shell of the differential is directly connected with a steel sheet through a spline. When the differential lock works, hydraulic oil is introduced into the piston cavity to push the piston, so that the friction plate, the steel sheet and the right shell of the differential are pressed together, and the locking of the differential is realized. In the process of combining and separating the differential lock, the steel sheet reciprocates on the right shell of the differential mechanism through the splines, and spline teeth need to be processed on the right shell of the differential mechanism.
The differential lock structure is an electro-hydraulic control wet differential lock, and both the differential lock structure and the electro-hydraulic control wet differential lock structure can achieve the locking function of the differential mechanism comfortably and conveniently. However, the two differential lock pistons are sealed by the O-shaped sealing ring in the piston cavity, the piston with the O-shaped sealing ring needs to be carefully assembled, otherwise the O-shaped sealing ring is easily cut to damage the O-shaped ring; among the above-mentioned differential lock structure, the steel sheet all with differential mechanism casing lug connection, need to process spline tooth etc. on differential mechanism casing and be used for connecting the steel sheet, be limited to differential mechanism casing material and bearing capacity, need design more spline tooth on the differential mechanism casing circumference, it is long to lead to the processing worker of casing, the bearing capacity of casing also receives certain restriction, simultaneously because the reason of differential mechanism casing material self hardness, after differential lock work a period, extruded furrow arris can appear in casing spline mating surface, influence the combination and the separation of differential lock.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of the differential lock structure, the utility model aims to provide an electro-hydraulic control hydraulic differential lock which is reliable in use, convenient to install and simple and compact in structure so as to meet the use requirements of a high-power tractor.
The utility model adopts the following specific scheme:
an electro-hydraulic control wet differential lock for a tractor comprises a rear box body, a bolt, a pin, a steel sheet, a differential cover, a friction plate, a differential shell, a half axle gear, a differential lock piston, a differential lock oil pipe, a differential bearing seat and a sealing ring;
the differential case and the differential cover are connected through bolts; the steel sheet is connected with the differential shell and the differential cover through pins; the friction plate is connected with the half axle gear through a spline; the steel sheets and the friction plates are sequentially arranged at intervals; the differential lock piston is arranged in a piston cavity of the differential mechanism shell; one end of the differential lock oil pipe is arranged on the rear box body, and the other end of the differential lock oil pipe is arranged on a differential bearing seat; the sealing ring is arranged on the differential shell;
the differential lock piston is provided with an outer sealing lip and an inner sealing lip, and the outer sealing lip and the inner sealing lip are matched and sealed with two radial circumferential surfaces of a piston cavity of the differential shell.
As a further optimization of the differential lock, a plurality of U-shaped notches are formed in the steel sheet along the periphery; the differential shell comprises a first oil inlet channel, a second oil inlet channel, a piston cavity, a differential shell pin hole and an arc notch; the arc notch is arranged at the pin hole of the differential shell; the arc notches correspond to the U-shaped notches one by one;
the differential cover is provided with a differential cover pin hole; one end of the pin is inserted into a pin hole of the differential shell, and the other end of the pin is inserted into a pin hole of the differential cover; a plurality of U-shaped gaps on the steel sheets are matched and connected with a plurality of pins, and a plurality of steel sheets are sleeved on the pins.
As a further optimization of the differential lock, six U-shaped notches are uniformly distributed on the steel sheet along the periphery.
The utility model has the following technical characteristics and beneficial effects:
1. the differential lock piston in the differential lock structure adopts an integrated structure, and the sealing lips are arranged inside and outside the piston, so that the piston has a sealing function in the reciprocating motion process, an O-shaped sealing ring on the existing differential lock piston is cancelled, the problem that the O-shaped ring is easy to damage in the installation process of the piston is avoided, meanwhile, the integrated piston is convenient and time-saving to install, and the assembly efficiency is improved;
2. the mode that the steel sheet is indirectly connected with the differential shell and the differential cover by the plurality of pins is adopted, only pin holes matched with the pins need to be processed on the differential shell and the differential cover, spline teeth and the like do not need to be processed on the differential shell, the processing technology of the differential shell is simplified, and the processing efficiency is improved; meanwhile, the processing quality of the pin is easy to control, and the hardness and the strength of the pin can be improved after heat treatment, so that the problem of clamping stagnation between the steel sheet and the pin is solved, and the rapid combination and separation of the differential lock can be ensured for a long time.
Drawings
FIG. 1 is a structural sectional view of a wet differential lock for a tractor according to the present invention;
FIG. 2 is a structural view of a steel sheet of a wet differential lock of a tractor according to the present invention;
FIG. 3 is a schematic structural view of a differential housing of the tractor wet differential lock of the present invention;
FIG. 4 is a schematic structural view of a differential cover of a wet differential lock of the tractor according to the present invention;
FIG. 5 is an assembly view of the steel plate, differential housing and differential cover of the tractor wet differential lock of the present invention;
FIG. 6 is a cross-sectional view of the tractor wet differential lock piston of the present invention;
FIG. 7 is an enlarged view of the structure of part A of FIG. 6;
in the figure: 1. a rear box body; 2. a bolt; 3. a pin; 4. a steel sheet; 41. a U-shaped notch; 5. a differential case; 51. a differential cover pin hole; 6. a friction plate; 7. a differential housing; 71. a first oil inlet channel; 72. a second oil inlet channel; 73. a piston cavity; 74. differential housing pin holes; 75. a circular arc notch; 8. a half shaft gear; 9. a differential lock piston; 91. sealing the lip outside; 92. an inner sealing lip; 10. an oil pipe of the differential lock; 11. a differential bearing seat; 12. and (5) sealing rings.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
Example 1
As shown in figure 1, the electro-hydraulic control wet differential lock for the tractor mainly comprises a rear box body 1, bolts 2, pins 3, steel sheets 4, a differential cover 5, friction plates 6, a differential shell 7, a side gear 8, a differential lock piston 9, a differential lock oil pipe 10, a differential bearing seat 11 and a sealing ring 12.
As shown in fig. 2, the steel sheet 4 includes a plurality of U-shaped notches 41.
As shown in fig. 1 and 3, the differential case 7 includes a first oil inlet passage 71, a second oil inlet passage 72, a piston chamber 73, a differential case pin hole 74, and a circular arc notch 75.
As shown in fig. 4, the differential cover 5 includes differential cover pin holes 51.
As shown in fig. 6 and 7, the differential lock piston 9 includes an outer seal lip 91 and an inner seal lip 92.
As shown in fig. 1 and 5, the differential case 7 and the differential cover 5 are connected together by a bolt 2, one end of the pin 3 is inserted into a pin hole 74 of the differential case, the other end of the pin is inserted into a pin hole 51 of the differential cover, a plurality of U-shaped notches 41 on the steel sheet 4 are matched and connected with a plurality of pins 3, the pin 3 is sleeved with a plurality of steel sheets 4, the differential case 7 is provided with an arc notch 75 at the pin hole 74 of the differential case, when the steel sheets 4 are prevented from being sleeved, the U-shaped notches 41 interfere with the differential case 7, so that the steel sheet 4 is connected with the differential case 7 and the differential cover 5 by the pins 3, the side gear 8 is sleeved with a plurality of friction plates 6, the friction plates 6 are connected with the side gear 8 by splines, the friction plates 4 and the steel sheets 6 are sequentially arranged at intervals, the differential lock piston 9 is installed in a piston cavity 73 of the differential case 7, through the outer sealing lip 91 and the inner sealing lip 92, the piston cavity 73 is sealed in a matched mode with the two radial circumferential surfaces, so that the differential lock piston 9 has a sealing function in the reciprocating motion process in the piston cavity 73, one end of the differential lock oil pipe 10 is installed on the rear box body 1, the other end of the differential lock oil pipe is installed on the differential bearing seat 11, the sealing ring 12 is installed on the differential case 7, and hydraulic oil entering the piston cavity 73 is prevented from leaking in the rotation process of the differential case 7.
As shown in fig. 1, when a driver opens the electric control button of the differential lock, hydraulic oil is introduced into a hydraulic oil inlet, the hydraulic oil enters a piston cavity 73 through an oil pipe 10 of the differential lock, a first oil inlet 71 and a second oil inlet 72, the piston 9 of the differential lock is pushed to move leftwards under the action of hydraulic oil pressure, the piston 9 of the differential lock pushes a steel sheet 4 and a friction sheet 6 until the steel sheet and the friction sheet are pressed onto a differential cover 5, and a side gear 8 and a differential shell 7 are locked together under the action of friction force, so that left and right half shafts of a tractor are connected together and can only rotate at the same speed, and the differential lock is combined. When a driver closes the electric control button of the differential lock, no hydraulic oil is supplied in the oil pipe 10 of the differential lock, the hydraulic oil in the piston cavity 73 is unloaded, the friction plate 6 is separated under the action of rotating centrifugal force, so that the steel sheet 4 and the friction plate 6 are loosened, the locking between the half axle gear 8 and the differential mechanism shell 7 is released, at the moment, the left half axle and the right half axle of the tractor are connected through the differential mechanism and can rotate at different rotating speeds, and the differential lock is separated.
The present invention is not described in detail in the prior art.
It should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the utility model, which is defined by the appended claims. It will be apparent to those skilled in the art that certain insubstantial modifications and adaptations of the present invention can be made without departing from the spirit and scope of the utility model.
Claims (3)
1. The utility model provides an electro-hydraulic control wet-type differential lock for tractor which characterized in that: the differential gear comprises a rear box body (1), a bolt (2), a pin (3), a steel sheet (4), a differential cover (5), a friction plate (6), a differential shell (7), a half axle gear (8), a differential lock piston (9), a differential lock oil pipe (10), a differential bearing seat (11) and a sealing ring (12);
the differential case (7) and the differential cover (5) are connected through bolts (2); the steel sheet (4) is connected with the differential case (7) and the differential cover (5) through the pin (3); the friction plate (6) is connected with the half shaft gear (8) through a spline; the steel sheets (4) and the friction plates (6) are sequentially arranged at intervals; the differential lock piston (9) is arranged in a piston cavity of the differential shell (7); one end of the differential lock oil pipe (10) is arranged on the rear box body (1), and the other end of the differential lock oil pipe is arranged on the differential bearing seat (11); the sealing ring (12) is arranged on the differential shell (7);
the differential lock piston (9) is provided with an outer sealing lip (91) and an inner sealing lip (92), and the outer sealing lip (91) and the inner sealing lip (92) are matched and sealed with two radial circumferential surfaces of the piston cavity.
2. A differential lock as defined in claim 1 wherein: the steel sheet (4) is provided with a plurality of U-shaped notches (41) along the periphery; the differential case (7) comprises a first oil inlet channel (71), a second oil inlet channel (72), a piston cavity (73), a differential case pin hole (74) and an arc notch (75); the arc notch (75) is arranged at a pin hole (74) of the differential case; the arc notches (75) correspond to the U-shaped notches (41) one by one;
a differential cover pin hole (51) is formed in the differential cover (5); one end of the pin (3) is inserted into a pin hole (74) of the differential case, and the other end of the pin is inserted into a pin hole (51) of the differential cover; a plurality of U-shaped gaps (41) on the steel sheets (4) are matched and connected with a plurality of pins (3), and a plurality of steel sheets (4) are sleeved on the pins (3).
3. A differential lock as defined in claim 1 wherein: six U-shaped notches (41) are uniformly distributed on the steel sheet (4) along the periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123397446.7U CN216519467U (en) | 2021-12-31 | 2021-12-31 | Electro-hydraulic control wet differential lock for tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123397446.7U CN216519467U (en) | 2021-12-31 | 2021-12-31 | Electro-hydraulic control wet differential lock for tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216519467U true CN216519467U (en) | 2022-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123397446.7U Active CN216519467U (en) | 2021-12-31 | 2021-12-31 | Electro-hydraulic control wet differential lock for tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216519467U (en) |
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2021
- 2021-12-31 CN CN202123397446.7U patent/CN216519467U/en active Active
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