CN114838105A - Hydraulic mechanical differential lock device and locking method - Google Patents
Hydraulic mechanical differential lock device and locking method Download PDFInfo
- Publication number
- CN114838105A CN114838105A CN202210529075.3A CN202210529075A CN114838105A CN 114838105 A CN114838105 A CN 114838105A CN 202210529075 A CN202210529075 A CN 202210529075A CN 114838105 A CN114838105 A CN 114838105A
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- differential lock
- shifting fork
- fork shaft
- shaft
- lock device
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 27
- 239000010720 hydraulic oil Substances 0.000 claims description 24
- 239000003921 oil Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000009286 beneficial effect Effects 0.000 description 16
- 230000000903 blocking effect Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/30—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means
- F16H48/32—Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means using fluid pressure actuators
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
- Retarders (AREA)
Abstract
The invention provides a hydro-mechanical differential lock device and a locking method. The hydromechanical differential lock device includes: the electromagnetic valve is connected with one end of the sealed cavity through a pipeline, one end of the shifting fork shaft is slidably mounted at the other end of the sealed cavity, one end of the shifting fork is connected with the middle of the shifting fork shaft, the other end of the shifting fork is connected with the differential lock, one end of the elastic component is connected with the box body, and the other end of the elastic component is abutted to the shifting fork. The differential lock shifting fork shaft is operated in a hydraulic operation mode, so that the layout of the differential lock device is more compact, and the space occupation of a cab is reduced. Meanwhile, the hydraulic pipeline is controlled to be switched on and off through the electromagnetic valve, continuous action is not needed during the function period of the differential lock, and the differential lock is convenient to operate.
Description
Technical Field
The invention relates to the technical field of differential lock mechanisms, in particular to a hydraulic mechanical differential lock device and a locking method.
Background
The function of the differential lock mechanism of the tractor is that when the wheels on one side slip, the differential lock is started, so that the left driving shaft and the right driving shaft are rigidly connected, most of torque is distributed to the side of the non-slip wheels, and sufficient traction force is generated.
Disclosure of Invention
The invention provides a hydraulic mechanical differential lock device and a locking method aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows: a hydro-mechanical differential lock device comprising: the electromagnetic valve is connected with one end of the sealed cavity through a pipeline, one end of the shifting fork shaft is slidably mounted at the other end of the sealed cavity, one end of the shifting fork is connected with the middle of the shifting fork shaft, the other end of the shifting fork is connected with the differential lock, one end of the elastic component is connected with the box body, and the other end of the elastic component is abutted to the shifting fork.
The technical scheme adopted by the invention has the beneficial effects that: the differential lock shifting fork shaft is operated in a hydraulic operation mode, so that the layout of the differential lock device is more compact, and the space occupation of a cab is reduced. Meanwhile, the hydraulic pipeline is controlled to be switched on and off through the electromagnetic valve, continuous action is not needed during the function period of the differential lock, and the differential lock is convenient to operate.
Further, install retaining ring and differential lock blanking cover on the box, the other end slidable mounting of declutch shift shaft is in the differential lock blanking cover, the differential lock blanking cover with the retaining ring is connected, elastomeric element's one end with the differential lock blanking cover butt.
The beneficial effect of adopting the further technical scheme is that: the arrangement of the retainer ring and the differential lock blocking cover facilitates the installation and maintenance of the shifting fork shaft and the elastic component.
Furthermore, the electromagnetic valve is connected with one end of the pipeline through a first hydraulic pipeline joint, and the other end of the pipeline is connected with one end of the sealing cavity through a second hydraulic pipeline joint.
The beneficial effect of adopting the further technical scheme is that: the hydraulic pipeline joint is convenient to install and maintain, upgrade and transformation are convenient, and the electromagnetic valve is convenient to connect with the sealing cavity.
Furthermore, one end of the shifting fork shaft is slidably mounted at the other end of the sealing cavity through an O-shaped sealing ring, and the O-shaped sealing ring is sleeved at one end of the shifting fork shaft.
The beneficial effect of adopting the further technical scheme is that: the O-shaped sealing ring is arranged, so that the shifting fork shaft is slidably mounted in the sealing cavity, the sealing performance is improved, the oil leakage of the sealing cavity is prevented, and the stability and the reliability of the hydraulic mechanical differential lock device are improved.
Further, the shift fork includes: the shifting fork body and the shifting fork shaft sleeve are of an integrally formed structure, the shifting fork body is connected with the differential lock, the shifting fork shaft sleeve is connected with the middle of the shifting fork shaft through a set screw, and one end of the set screw penetrates through the shifting fork shaft sleeve and is fixed to the middle of the shifting fork shaft.
The beneficial effect of adopting the further technical scheme is that: the setting of shift fork body and shift fork axle sleeve, the shift fork of being convenient for is connected with shift fork axle and differential lock respectively, prevents that the shift fork from rocking, improves the intensity of shift fork, improves hydromechanical type differential lock device's stability and reliability. Due to the arrangement of the fastening screw, the shifting fork can be conveniently fixed on the shifting fork shaft, the shifting fork can be prevented from being pulled out and sliding, and the stability and the reliability of the shifting fork can be improved.
Furthermore, the pipeline is a steel pipe, the elastic component is a spring, and the elastic component is sleeved on the outer side wall of the shifting fork shaft.
The beneficial effect of adopting the further technical scheme is that: the pipeline is the steel pipe, improves the intensity of pipeline, and elastomeric element is the spring, and reduce cost, elastomeric element cover prevent that the declutch shift axle from rocking on the lateral wall of declutch shift axle, prevent declutch shift axle jamming, improve the stability and the reliability of declutch shift axle.
Furthermore, the electromagnetic valve is connected with an oil pump through a pipeline, the oil pump is connected with a hydraulic oil tank through a pipeline, and hydraulic oil is loaded in the hydraulic oil tank.
In addition, the present invention further provides a method for locking a hydro-mechanical differential lock, based on any one of the above-mentioned hydro-mechanical differential lock devices, the method for locking a hydro-mechanical differential lock comprising:
when the differential lock is required to work, the electromagnetic valve is opened,
the hydraulic oil in the hydraulic oil tank enters the sealing cavity through the electromagnetic valve and the pipeline,
the hydraulic oil entering the sealing cavity pushes the shifting fork shaft to move rightwards along the axial direction of the shifting fork shaft,
the shifting fork compresses the elastic part, and simultaneously, the shifting fork shaft drives the differential lock to move rightwards through the shifting fork.
The technical scheme adopted by the invention has the beneficial effects that: the differential lock shifting fork shaft is operated in a hydraulic operation mode, so that the structural layout of the differential lock is more compact, and the space occupation of a cab is reduced. Meanwhile, the hydraulic pipeline is controlled to be switched on and off through the electromagnetic valve, continuous action is not needed during the function period of the differential lock, and the differential lock is convenient to operate.
Further, still include: when the differential lock needs to be released, the electromagnetic valve is closed,
the elastic component stretches under the action of elasticity and pushes the shifting fork,
the shifting fork drives the shifting fork shaft to move leftwards along the axial direction of the shifting fork shaft,
the shifting fork shaft pushes the hydraulic oil to flow back to the electromagnetic valve from the sealing cavity and the pipeline,
the shifting fork shaft drives the differential lock to move leftwards through the shifting fork.
The beneficial effect of adopting the further technical scheme is that: after the electromagnetic valve is closed, the automatic return is realized through the elastic action of the elastic component, the reliability of the hydraulic mechanical differential lock device is improved, and the user experience is improved.
Advantages of additional aspects of the invention 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 invention.
Drawings
Fig. 1 is a schematic structural view of a hydro-mechanical differential lock device according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a locking method of a hydro-mechanical differential lock according to an embodiment of the invention.
The reference numbers illustrate: 1. an electromagnetic valve; 2. a fork shaft; 3. a shifting fork; 4. a differential lock; 5. an elastic member; 6. a box body; 7. sealing the cavity; 8. a retainer ring; 9. a differential lock blocking cover; 10. a first hydraulic line connector; 11. a pipeline; 12. a second hydraulic line connection; 13. an O-shaped sealing ring; 14. a shifting fork body; 15. a shift fork shaft sleeve; 16. and (5) tightening the screw.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a hydro-mechanical differential lock device, which includes: solenoid valve 1, declutch shift shaft 2, shift fork 3, differential lock 4, elastomeric element 5, box 6, be provided with sealed chamber 7 on the box 6, solenoid valve 1 pass through pipeline 11 with the one end in sealed chamber 7 is connected, the one end slidable mounting of declutch shift shaft 2 is in the other end in sealed chamber 7, the one end of shift fork 3 with the middle part of declutch shift shaft 2 is connected, the other end of shift fork 3 with differential lock 4 is connected, elastomeric element 5's one end with box 6 is connected, elastomeric element 5's the other end with 3 butts of shift fork.
The technical scheme adopted by the invention has the beneficial effects that: the differential lock shifting fork shaft is operated in a hydraulic operation mode, so that the layout of the differential lock device is more compact, and the space occupation of a cab is reduced. Meanwhile, the hydraulic pipeline is controlled to be switched on and off through the electromagnetic valve, continuous action is not needed during the function period of the differential lock, and the differential lock is convenient to operate.
The box body can be a bearing structure of the differential lock control component, and the sealing cavity can be directly arranged on the box body.
As shown in fig. 1, a retainer ring 8 and a differential lock cover 9 are further mounted on the box 6, the other end of the shift fork shaft 2 is slidably mounted in the differential lock cover 9, the differential lock cover 9 is connected with the retainer ring 8, and one end of the elastic member 5 abuts against the differential lock cover 9.
The beneficial effect of adopting the further technical scheme is that: the arrangement of the retainer ring and the differential lock blocking cover facilitates the installation and maintenance of the shifting fork shaft and the elastic component.
As shown in fig. 1, the solenoid valve 1 is further connected to one end of a pipeline 11 through a first hydraulic pipeline joint 10, and the other end of the pipeline 11 is connected to one end of the sealed chamber 7 through a second hydraulic pipeline joint 12.
The beneficial effect of adopting the further technical scheme is that: the hydraulic pipeline joint is convenient to install and maintain, upgrade and transformation are convenient, and the electromagnetic valve is convenient to connect with the sealing cavity.
As shown in fig. 1, further, one end of the shift fork shaft 2 is slidably mounted at the other end of the seal cavity 7 through an O-ring 13, and the O-ring 13 is sleeved on one end of the shift fork shaft 2.
The beneficial effect of adopting the further technical scheme is that: the O-shaped sealing ring is arranged, so that the shifting fork shaft is slidably mounted in the sealing cavity, the sealing performance is improved, the oil leakage of the sealing cavity is prevented, and the stability and the reliability of the hydraulic mechanical differential lock device are improved.
As shown in fig. 1, further, the shift fork 3 includes: the shifting fork comprises a shifting fork body 14 and a shifting fork shaft sleeve 15, wherein the shifting fork body 14 and the shifting fork shaft sleeve 15 are of an integrated structure, the shifting fork body 14 is connected with the differential lock 4, the shifting fork shaft sleeve 15 is connected with the middle of the shifting fork shaft 2 through a set screw 16, and one end of the set screw 16 penetrates through the shifting fork shaft sleeve 15 and is fixed to the middle of the shifting fork shaft 2.
The beneficial effect of adopting the further technical scheme is that: the shifting fork body with the setting of shifting fork axle sleeve, the shifting fork of being convenient for is connected with shifting fork axle and differential lock respectively, prevents that the shifting fork from rocking, improves the intensity of shifting fork, improves hydromechanical type differential lock device's stability and reliability. The setting screw is convenient for the shift fork to fix on the shift fork axle, prevents to extract the slip, improves the stability and the reliability of shift fork.
As shown in fig. 1, the pipeline 11 is a steel pipe, the elastic member 5 is a spring, and the elastic member 5 is sleeved on an outer side wall of the fork shaft 2.
The beneficial effect of adopting the further technical scheme is that: the pipeline is the steel pipe, improves the intensity of pipeline, and elastomeric element is the spring, and reduce cost, elastomeric element cover prevent that the declutch shift axle from rocking on the lateral wall of declutch shift axle, prevent declutch shift axle jamming, improve the stability and the reliability of declutch shift axle.
Furthermore, the electromagnetic valve is connected with an oil pump through a pipeline, the oil pump is connected with a hydraulic oil tank through a pipeline, and hydraulic oil is loaded in the hydraulic oil tank.
The invention adopts a hydraulic and mechanical mode to realize the operation of the differential lock, adopts a hydraulic operation mode to realize the operation of the shifting fork shaft of the differential lock, and replaces a series of mechanical operation mechanisms, so that the layout of the differential lock device is more compact, and the space occupation of a cab is reduced. Meanwhile, the hydraulic pipeline is controlled to be switched on and off through the electromagnetic valve, continuous action is not needed during the function period of the differential lock, and the differential lock is convenient to operate.
The differential lock device is of a hydraulic mechanical type and is divided into a hydraulic part and a mechanical part, wherein the hydraulic part comprises a pipeline, a joint and an electromagnetic valve, and the mechanical part comprises a differential lock, a shifting fork shaft, a spring and the like.
The hydraulic part comprises a first hydraulic pipeline joint, a steel pipe, a second hydraulic pipeline joint and an electromagnetic valve; the mechanical part comprises a shifting fork shaft, a shifting fork, a differential lock, a spring, a differential lock blocking cover, a check ring, a set screw, an O-shaped sealing ring and a box body.
When an oil inlet valve of the differential lock of the electromagnetic valve is opened, low-pressure hydraulic oil enters a sealing cavity formed by a second hydraulic pipeline joint, a shifting fork shaft, a box body and an O-shaped sealing ring through a steel pipe, the shifting fork shaft is pushed to move rightwards along the axis direction, a spring is compressed, the differential lock is driven to move rightwards through a shifting fork, and the differential shell is rigidly connected with a half axle gear.
When an oil inlet valve of a differential lock of the electromagnetic valve is closed, an oil return valve is opened, the pressure of hydraulic oil in the steel pipe is reduced, a shifting fork shaft moves leftwards along the axis direction under the action of a spring, the differential lock is driven to move leftwards through a shifting fork, the rigid connection between a differential shell and a half axle gear is removed, and the differential function is recovered.
The invention solves the problems that the external control part of the mechanical differential lock structure has a complex structure and occupies a large arrangement space. According to the invention, the differential locking function is realized by controlling hydraulic oil, continuous operation of operators is not required during the function of the differential lock, the ergonomics is better, and the user experience is improved.
As shown in fig. 2, the present invention further provides a method for locking a hydro-mechanical differential lock, based on any one of the above-mentioned devices, the method for locking a hydro-mechanical differential lock includes:
s1, when the differential lock is required to work, the electromagnetic valve is opened,
s2, hydraulic oil in the hydraulic oil tank enters the seal cavity through the electromagnetic valve and the pipeline,
s3, the hydraulic oil entering the seal cavity pushes the shifting fork shaft to move rightwards along the axial direction of the shifting fork shaft,
s4, the shifting fork compresses the elastic part, and meanwhile, the shifting fork shaft drives the differential lock to move rightwards through the shifting fork.
The technical scheme adopted by the invention has the beneficial effects that: the differential lock shifting fork shaft is operated in a hydraulic operation mode, so that the structural layout of the differential lock is more compact, and the space occupation of a cab is reduced. Meanwhile, the hydraulic pipeline is controlled to be switched on and off through the electromagnetic valve, continuous action is not needed during the function period of the differential lock, and the differential lock is convenient to operate.
As shown in fig. 2, further, the method further includes: when the differential lock needs to be released, the electromagnetic valve is closed,
the elastic component stretches under the action of elasticity and pushes the shifting fork,
the shifting fork drives the shifting fork shaft to move leftwards along the axial direction of the shifting fork shaft,
the shifting fork shaft pushes the hydraulic oil to flow back to the electromagnetic valve from the sealing cavity and the pipeline,
the shifting fork shaft drives the differential lock to move leftwards through the shifting fork.
The beneficial effect of adopting the further technical scheme is that: after the electromagnetic valve is closed, the automatic return is realized through the elastic action of the elastic component, the reliability of the hydraulic mechanical differential lock device is improved, and the user experience is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A hydromechanical differential lock apparatus, comprising: solenoid valve (1), declutch shift shaft (2), shift fork (3), differential lock (4), elastomeric element (5), box (6), be provided with sealed chamber (7) on box (6), solenoid valve (1) through pipeline (11) with the one end in sealed chamber (7) is connected, the one end slidable mounting of declutch shift shaft (2) in the other end in sealed chamber (7), the one end of shift fork (3) with the middle part of declutch shift shaft (2) is connected, the other end of shift fork (3) with differential lock (4) are connected, the one end of elastomeric element (5) with box (6) are connected, the other end of elastomeric element (5) with shift fork (3) butt.
2. A hydromechanical differential lock device as claimed in claim 1, characterized in that a retaining ring (8) and a differential lock cover (9) are mounted on the housing (6), the other end of the fork shaft (2) is slidably mounted in the differential lock cover (9), the differential lock cover (9) is connected to the retaining ring (8), and one end of the elastic member (5) abuts against the differential lock cover (9).
3. A hydromechanical differential lock device according to claim 1, characterised in that the solenoid valve (1) is connected to one end of a line (11) by means of a first hydraulic line connection (10), and the other end of the line (11) is connected to one end of the sealed chamber (7) by means of a second hydraulic line connection (12).
4. Hydromechanical differential lock device according to claim 1, in which one end of the shift fork shaft (2) is slidably mounted at the other end of the seal chamber (7) by means of an O-ring seal (13), the O-ring seal (13) being fitted over one end of the shift fork shaft (2).
5. A hydromechanical differential lock device as claimed in claim 1, in which the fork (3) comprises: the shifting fork comprises a shifting fork body (14) and a shifting fork shaft sleeve (15), wherein the shifting fork body (14) and the shifting fork shaft sleeve (15) are of an integrated forming structure, the shifting fork body (14) is connected with the differential lock (4), the shifting fork shaft sleeve (15) is connected with the middle of the shifting fork shaft (2) through a set screw (16), and one end of the set screw (16) penetrates through the shifting fork shaft sleeve (15) and is fixed to the middle of the shifting fork shaft (2).
6. A hydromechanical differential lock device as claimed in claim 1, wherein the conduit (11) is a steel pipe, the resilient member (5) is a spring, and the resilient member (5) is fitted over the outer side wall of the fork shaft (2).
7. A hydromechanical differential lock device as claimed in claim 1 in which the solenoid valve is connected by a line to an oil pump, the oil pump is connected by a line to a hydraulic oil tank, and the hydraulic oil tank is filled with hydraulic oil.
8. A method for locking a hydro-mechanical differential lock, based on the hydro-mechanical differential lock device as claimed in any one of claims 1 to 7, the method comprising:
when the differential lock is required to work, the electromagnetic valve is opened,
the hydraulic oil in the hydraulic oil tank enters the sealing cavity through the electromagnetic valve and the pipeline,
the hydraulic oil entering the sealing cavity pushes the shifting fork shaft to move rightwards along the axial direction of the shifting fork shaft,
the shifting fork compresses the elastic part, and simultaneously, the shifting fork shaft drives the differential lock to move rightwards through the shifting fork.
9. The method of claim 8, further comprising: when the differential lock needs to be released, the electromagnetic valve is closed,
the elastic component stretches under the action of elasticity and pushes the shifting fork,
the shifting fork drives the shifting fork shaft to move leftwards along the axial direction of the shifting fork shaft,
the shifting fork shaft pushes the hydraulic oil to flow back to the electromagnetic valve from the sealing cavity and the pipeline,
the shifting fork shaft drives the differential lock to move leftwards through the shifting fork.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210529075.3A CN114838105A (en) | 2022-05-16 | 2022-05-16 | Hydraulic mechanical differential lock device and locking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210529075.3A CN114838105A (en) | 2022-05-16 | 2022-05-16 | Hydraulic mechanical differential lock device and locking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114838105A true CN114838105A (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210529075.3A Pending CN114838105A (en) | 2022-05-16 | 2022-05-16 | Hydraulic mechanical differential lock device and locking method |
Country Status (1)
| Country | Link |
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| CN (1) | CN114838105A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06257647A (en) * | 1993-03-03 | 1994-09-16 | Kubota Corp | Differential gear lock device |
| CN101949443A (en) * | 2010-09-26 | 2011-01-19 | 青特集团有限公司 | Integrally combined differential lock |
| CN206845879U (en) * | 2017-07-14 | 2018-01-05 | 雷沃重工股份有限公司 | Oil cylinder differential lock construction and tractor built in a kind of Novel tractor |
| CN208153659U (en) * | 2018-02-25 | 2018-11-27 | 江苏悦达智能农业装备有限公司 | Wheeled tractor differential lock device |
| CN217422095U (en) * | 2022-05-16 | 2022-09-13 | 潍柴雷沃重工股份有限公司 | Hydraulic mechanical differential lock device |
-
2022
- 2022-05-16 CN CN202210529075.3A patent/CN114838105A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06257647A (en) * | 1993-03-03 | 1994-09-16 | Kubota Corp | Differential gear lock device |
| CN101949443A (en) * | 2010-09-26 | 2011-01-19 | 青特集团有限公司 | Integrally combined differential lock |
| CN206845879U (en) * | 2017-07-14 | 2018-01-05 | 雷沃重工股份有限公司 | Oil cylinder differential lock construction and tractor built in a kind of Novel tractor |
| CN208153659U (en) * | 2018-02-25 | 2018-11-27 | 江苏悦达智能农业装备有限公司 | Wheeled tractor differential lock device |
| CN217422095U (en) * | 2022-05-16 | 2022-09-13 | 潍柴雷沃重工股份有限公司 | Hydraulic mechanical differential lock device |
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Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Applicant after: Weichai Lovol Intelligent Agricultural Technology Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Applicant before: Weichai leiwo Heavy Industry Co.,Ltd. |