CN202998796U - Hydraulic lifting device of tractor - Google Patents
Hydraulic lifting device of tractor Download PDFInfo
- Publication number
- CN202998796U CN202998796U CN 201220743232 CN201220743232U CN202998796U CN 202998796 U CN202998796 U CN 202998796U CN 201220743232 CN201220743232 CN 201220743232 CN 201220743232 U CN201220743232 U CN 201220743232U CN 202998796 U CN202998796 U CN 202998796U
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- piston
- hydraulic
- hydraulic cylinder
- housing
- oil
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- Expired - Fee Related
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Abstract
The utility model discloses a hydraulic lifting device of a tractor. The hydraulic lifting device of the tractor comprises a shell body. A lifting crank arm composed of an inner lifting arm and an outer lifting arm is assembled on the shell body in a rotating mode, wherein the inner lifting arm is arranged in the shell body, and the outer lifting arm is arranged outside the shell body. A hydraulic cylinder is further arranged in the shell body, and a piston is assembled in the hydraulic cylinder. The piston is in transmission connection with the inner lifting arm of the lifting crank arm through a piston rod, and the piston rod is hinged with the inner lifting arm of the lifting crank arm. The hydraulic cylinder is hinged with the shell body, and a hinged portion, hinged with the shell body, on the hydraulic cylinder is positioned on one end, away from a drive crank arm, of the hydraulic cylinder. According to the hydraulic lifting device of the tractor, the hydraulic cylinder, the piston rod and the inner lifting arm are all arranged in the shell body, the shell body can effectively protect a piston cylinder and the piston rod, and therefore external environment disturbance on the piston cylinder and the piston rod is not prone to happen.
Description
Technical field
The utility model belongs to the tractor technical field, is specifically related to a kind of hydraulic pressure elevator of tractor.
Background technology
Existing tractor is many to be driven the farm implements rising or descends by lifter, for in the Chinese utility model patent specification of CN2722588Y, a kind of lifter is disclosed at Granted publication number, this lifter comprise be rotatably installed on upgrade block by inside and outside lift arm by the lifting connecting lever that promotes arm axle and consist of and external hydraulic cylinder, the piston of hydraulic cylinder is hinged by piston rod and interior lift arm.During use, the piston driving piston rod moves back and forth, and realizes driving the rotation of connecting lever, thereby realizes rising or descending by driving connecting lever driving farm implements.But outside above-mentioned hydraulic rockshaft is arranged in, and the workplace of lifter is more chaotic, and hydraulic cylinder and piston rod easily are interfered, and then affect the normal use of lifter.
The utility model content
The purpose of this utility model is to provide a kind of hydraulic pressure elevator of tractor, easily is subject to the technical problem of external interference with hydraulic cylinder and piston rod in the solution prior art.
for achieving the above object, the technical scheme of hydraulic pressure elevator of tractor provided by the utility model is: hydraulic pressure elevator of tractor, comprise housing, be rotatably equipped with on housing by interior, the lifting connecting lever that outer lift arm consists of, wherein interior lift arm is arranged in housing, outer lift arm is positioned at outside housing, also be provided with hydraulic cylinder in described housing, be equipped with piston in hydraulic cylinder, piston is in transmission connection by piston rod and lifting connecting lever, piston rod is hinged with the lifting connecting lever, described hydraulic cylinder and housing are hinged, on hydraulic cylinder with the hinged hinge point of housing in hydraulic cylinder away from an end that drives connecting lever.
the hydraulic cavities of described hydraulic cylinder is separated into rising chamber and decline chamber by piston, the decline hydraulic fluid port that hydraulic cylinder is provided with the rising hydraulic fluid port that is communicated with the chamber of rising and is communicated with the decline chamber, lifter also comprises the hydraulic control system for the control piston station, hydraulic control system comprises four six logical hand-operated direction valves, four six logical hand-operated direction valves have two oil-ins, two oil return openings and two working holes, two oil-ins are communicated with oil pump by oil feeding line, two oil return openings are communicated with fuel tank by oil return circuit, two working holes of four six logical hand-operated direction valves are communicated with described rising hydraulic fluid port and decline hydraulic fluid port respectively, described four six logical hand-operated direction valves have makes the overhanging corresponding upper raise-position of piston actuated piston rod, the neutral position that makes the piston actuated piston rod inside contract corresponding decline position and piston is in hover and make piston be in unsteady floating bit.
Described hydraulic control system also comprises the overflow valve that is arranged between oil feeding line and oil return circuit.
Described oil feeding line has and two two branch roads that oil-in is corresponding, and described hydraulic control system also comprises the check valve that is arranged on branch road.
Described housing along continuous straight runs extends, and described hydraulic cylinder along continuous straight runs is arranged in described housing.
Described housing is made of Plate Welding.
The beneficial effects of the utility model are: the hydraulic cylinder in lifter provided by the utility model and piston rod and interior lift arm all are placed in housing, and housing can effectively be protected piston cylinder and piston rod, make it be not easy to be subject to the interference of external environment.And piston rod and driving connecting lever are hinged, hydraulic cylinder and housing are hinged, like this when the piston driving piston rod moves back and forth, piston rod drives and promotes the connecting lever action, piston rod will drive hydraulic cylinder and synchronize with the hinged center line of housing around hydraulic cylinder under the guiding that drives connecting lever and rotate, the service life of assurance hydraulic cylinder and piston rod.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of hydraulic pressure elevator of tractor provided by the utility model;
Fig. 2 is the hydraulic control system schematic diagram of hydraulic rockshaft described in Fig. 1.
Embodiment
as Fig. 1, shown in Figure 2, a kind of embodiment of hydraulic pressure elevator of tractor, lifter in this embodiment comprises housing 1, be rotatably equipped with on housing 1 by interior lift arm 4, the lifting connecting lever 8 that outer lift arm 2 and lifting arm axle 3 consist of, be provided with hydraulic cylinder 5 in housing 1, the mobile piston that is equipped with in hydraulic cylinder 5, piston is in transmission connection by piston rod 6 and the interior lift arm 4 that promotes connecting lever 8, piston rod 6 is hinged with interior lift arm 4, hydraulic cylinder 5 herein is hinged by jointed shaft 9 and housing 1, on hydraulic cylinder 5 with housing 1 hinged articulated section 7 be positioned at hydraulic cylinder 5 away from an end that drives connecting lever 8.Carry the tilling depth limit valve on described hydraulic cylinder 5.
The present embodiment middle shell 1 along continuous straight runs extends, and hydraulic cylinder along continuous straight runs is arranged in described housing.Housing 1 is made of Plate Welding, and is easy to process.
in the present embodiment, lifter also comprises the hydraulic control system for the control piston station, this hydraulic control system comprises four six logical hand-operated direction valves 14, overflow valve 12 and check valve 13, four six logical hand-operated direction valves 14 have two oil-ins, two oil return openings and two working holes, two oil-ins are communicated with oil pump 11 by oil feeding line, two oil return openings are communicated with fuel tank 10 by oil return circuit, described overflow valve 12 is arranged between oil feeding line and oil return circuit, oil feeding line herein has and two two branch roads that oil-in is corresponding, described check valve 13 is arranged on one of them branch road.The hydraulic cavities 15 of hydraulic cylinder 5 is separated into rising chamber 16 and decline chamber 17 by piston, the decline hydraulic fluid port that hydraulic cylinder 5 is provided with the rising hydraulic fluid port that is communicated with the chamber 16 of rising and is communicated with decline chamber 17, rising hydraulic fluid port and decline hydraulic fluid port are communicated with two working holes of four six logical hand-operated direction valves 14 respectively by oil circuit.Herein four six logical hand-operated direction valves have to be made the overhanging corresponding upper raise-position of piston actuated piston rod, make the piston actuated piston rod inside contract corresponding decline position and piston is in the neutral position that hovers and makes piston be in unsteady floating bit.
During use, by the operation hand-operated direction valve, hand-operated direction valve is in respectively raise-position, descend position, neutral position and floating bit, makes the outer lift arm of lifter be in rising, decline, neutrality and unsteady state.When piston driving piston rod 6 moves back and forth, in piston rod 3 will drive, lift arm 4 rotates around promoting arm axle 3, at this moment, under the drive of interior lift arm 4, piston rod 6 will drive hydraulic cylinder 5 and synchronously rotate around the hinged center line of jointed shaft 9, avoid additional wear occurring between piston rod 6 and hydraulic cylinder 5, guarantee the service life of hydraulic cylinder and piston rod.
Claims (6)
1. hydraulic pressure elevator of tractor, it is characterized in that: comprise housing, be rotatably equipped with the lifting connecting lever that is consisted of by inside and outside lift arm on housing, wherein interior lift arm is arranged in housing, outer lift arm is positioned at outside housing, also be provided with hydraulic cylinder in described housing, be equipped with piston in hydraulic cylinder, piston is in transmission connection by piston rod and the interior lift arm that promotes connecting lever, piston rod is hinged with the interior lift arm that promotes connecting lever, described hydraulic cylinder and housing are hinged, on hydraulic cylinder with the hinged hinge point of housing in hydraulic cylinder away from an end that drives connecting lever.
2. hydraulic pressure elevator of tractor according to claim 1, it is characterized in that: the hydraulic cavities of described hydraulic cylinder is separated into rising chamber and decline chamber by piston, the decline hydraulic fluid port that hydraulic cylinder is provided with the rising hydraulic fluid port that is communicated with the chamber of rising and is communicated with the decline chamber, lifter also comprises the hydraulic control system for the control piston station, hydraulic control system comprises four six logical hand-operated direction valves, four six logical hand-operated direction valves have two oil-ins, two oil return openings and two working holes, two oil-ins are communicated with oil pump by oil feeding line, two oil return openings are communicated with fuel tank by oil return circuit, two working holes of four six logical hand-operated direction valves are communicated with described rising hydraulic fluid port and decline hydraulic fluid port respectively, described four six logical hand-operated direction valves have makes the overhanging corresponding upper raise-position of piston actuated piston rod, the neutral position that makes the piston actuated piston rod inside contract corresponding decline position and piston is in hover and make piston be in unsteady floating bit.
3. hydraulic pressure elevator of tractor according to claim 2, it is characterized in that: described hydraulic control system also comprises the overflow valve that is arranged between oil feeding line and oil return circuit.
4. hydraulic pressure elevator of tractor according to claim 2, it is characterized in that: described oil feeding line has and two two branch roads that oil-in is corresponding, and described hydraulic control system also comprises the check valve that is arranged on branch road.
5. the described hydraulic pressure elevator of tractor of any one according to claim 1 to 4 is characterized in that: described housing along continuous straight runs extends, and described hydraulic cylinder along continuous straight runs is arranged in described housing.
6. the described hydraulic pressure elevator of tractor of any one according to claim 1 to 4, it is characterized in that: described housing is made of Plate Welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220743232 CN202998796U (en) | 2012-12-31 | 2012-12-31 | Hydraulic lifting device of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220743232 CN202998796U (en) | 2012-12-31 | 2012-12-31 | Hydraulic lifting device of tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202998796U true CN202998796U (en) | 2013-06-19 |
Family
ID=48590446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220743232 Expired - Fee Related CN202998796U (en) | 2012-12-31 | 2012-12-31 | Hydraulic lifting device of tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202998796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982560A (en) * | 2017-06-01 | 2017-07-28 | 东洋重工机（大连）有限公司 | A kind of medium-and-large-sized farm tractor hydraulic rockshaft |
-
2012
- 2012-12-31 CN CN 201220743232 patent/CN202998796U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982560A (en) * | 2017-06-01 | 2017-07-28 | 东洋重工机（大连）有限公司 | A kind of medium-and-large-sized farm tractor hydraulic rockshaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20201231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |