CN113374761A - Vehicle lifter hydraulic control system, control circuit and lifter - Google Patents
Vehicle lifter hydraulic control system, control circuit and lifter Download PDFInfo
- Publication number
- CN113374761A CN113374761A CN202110680371.9A CN202110680371A CN113374761A CN 113374761 A CN113374761 A CN 113374761A CN 202110680371 A CN202110680371 A CN 202110680371A CN 113374761 A CN113374761 A CN 113374761A
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- Prior art keywords
- hydraulic
- circuit
- oil
- valve
- switch circuit
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 72
- 239000010720 hydraulic oil Substances 0.000 claims description 47
- 230000009466 transformation Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
- F15B11/0426—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling the number of pumps or parallel valves switched on
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
Abstract
The technical scheme provided by the invention is as follows: vehicle machine hydraulic control system, control circuit and machine of lifting, including oil tank, oil absorption filter screen, hydraulic pump, motor, first hydraulic pressure oil circuit and second hydraulic pressure oil circuit, the hydraulic pump is through oil absorption filter screen from oil tank pump oil, the motor drive hydraulic pump, first hydraulic pressure oil circuit includes first pressure compensation valve and first two-way normally closed solenoid valve, the second hydraulic pressure oil circuit includes second pressure compensation valve and two-way normally closed solenoid valve of second, first pressure compensation valve draining volume is greater than the draining volume of second pressure compensation valve, through the work switching of first hydraulic pressure oil circuit and second hydraulic pressure oil circuit, realizes fast, medium speed and three speed confession selection at a slow speed.
Description
Technical Field
The invention relates to the technical field of vehicle lifting control, in particular to a hydraulic control system of a vehicle lifter, a control circuit and the vehicle lifter.
Background
With the development of the vehicle industry, vehicle lifts are mainly used for repairing or assembling vehicles. The number of vehicle lifting machines is increasing, but the lifting speed of the lifting machine is generally constant, so that a plurality of lifting machines with different lifting speeds are required to use the lifting machines with different lifting speeds, and the purchase cost is high. The current variable speed design of the lifting machine without the lifting speed has lower adaptability of the lifting machine.
In view of the above, there is a need to improve the lifting speed of the prior art lifter to solve the above problems.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to disclose a hydraulic control system, a control circuit and a lifting machine for a vehicle lifting machine, so as to achieve a fast, medium and slow speed regulation function of the lifting machine, so as to increase flexibility and adaptability of the lifting machine, and to solve the defect that the lifting speed of the lifting machine in the prior art cannot be adjusted.
To achieve the first object, the present invention provides a hydraulic control system for a vehicle lift, including: oil tank, oil absorption filter screen, hydraulic pump, motor, first hydraulic pressure oil circuit and second hydraulic pressure oil circuit, the hydraulic pump passes through the oil absorption filter screen and pumps oil from the oil tank, the motor drive hydraulic pump, first hydraulic pressure oil circuit includes first pressure compensation valve and first two-way normally closed solenoid valve, the second hydraulic pressure oil circuit includes two-way normally closed solenoid valve of second pressure compensation valve and second, first pressure compensation valve oil drainage volume is greater than the oil drainage volume of second pressure compensation valve.
As a further development of the invention, the hydraulic pump is provided with a non-return valve.
As a further improvement of the invention, the emergency electromagnetic valve further comprises an overflow valve, and the first two-position two-way normally closed electromagnetic valve and the second two-position two-way normally closed electromagnetic valve are both provided with emergency valves
As a further improvement of the invention, the invention also comprises an oil cylinder and a throttle valve
As a further improvement of the invention, the control system further comprises a pressure sensor, and the pressure sensor is arranged at the oil outlet.
Based on the same invention idea and in order to achieve the second object, the invention provides a hydraulic control circuit of a vehicle lifting machine, which comprises a power supply circuit, a voltage transformation circuit and a hydraulic oil path switch circuit, wherein the power supply circuit comprises a contactor KM and a contactor switch KA4, the contactor KM and the contactor switch KA4 are connected in series, the hydraulic oil path switch circuit comprises a first switch circuit and a second switch circuit, the first switch circuit comprises series-connected switches KA1-1 and KA1-2 and any one of the first hydraulic oil paths, the second switch circuit comprises series-connected switches KA2-1 and KA2-2 and any one of the second hydraulic oil paths, and the voltage transformation circuit is connected with the power supply circuit and the hydraulic oil path switch circuit.
As a further improvement of the present invention, the first switch circuit is further connected in parallel with an indicator lamp.
As a further improvement of the present invention, when the first switch circuit and the second switch circuit are both energized, the first hydraulic oil path and the second hydraulic oil path are both opened, the oil output of the hydraulic system is the maximum, and the lifting speed is fast.
As a further improvement of the present invention, when the first switch circuit is powered on and the second switch circuit is powered off, the first pressure compensation valve is started, and because the oil drainage amount of the first pressure compensation valve of the first hydraulic oil path is large, the oil output amount of the hydraulic system is minimum, and the lifting speed is slow; when the second switch circuit is powered on and the first switch circuit is powered off, the oil drainage quantity of the second pressure compensation valve of the second hydraulic oil way is small, the oil outlet quantity of the hydraulic system is small, and the lifting speed is low.
Based on the same invention idea and to achieve the third object, the invention provides a vehicle lifting machine, which comprises the vehicle lifting machine hydraulic control system created by the first invention and the vehicle lifting machine hydraulic control circuit created by the second invention.
Compared with the prior art, the invention has the following technical effects:
the vehicle lifter is provided with a first hydraulic oil way and a second hydraulic oil way, when the first hydraulic oil way and the second hydraulic oil way work simultaneously, the oil output of a hydraulic system is the largest, and the lifter is rapid; because the oil drainage amount of the first pressure compensation valve is greater than that of the second pressure compensation valve, when only the first hydraulic oil way works, the oil outlet amount of the hydraulic system is minimum, and the lifting machine is at a low speed; when only the second hydraulic oil circuit works, the oil outlet amount of the hydraulic system is the largest, the lifting machine is at a medium speed, and three speeds of a high speed, a medium speed and a low speed are selected by switching the work of the first hydraulic oil circuit and the work of the second hydraulic oil circuit.
In addition, in order to meet the requirement of a user on the lifting speed when the lifting machine leaves a factory, the lifting speed of the lifting machine can be fixed, only the quick speed, the medium speed and the slow speed are selected, so that one set of hydraulic system can meet the user requirements of three lifting speeds, from the cost perspective of the hydraulic system, the development cost of the hydraulic systems of the lifting machine with different lifting speeds is greatly reduced, the universality of the hydraulic system is improved, the production efficiency of the lifting machine is improved, and when the lifting speed is required to be adjusted by the user, the lifting machine can be realized only by changing the setting of an oil way.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a vehicle lift hydraulic control system of the present invention.
Fig. 2 is a schematic diagram of a hydraulic control circuit for a vehicle lift according to the present invention.
Wherein, 1, an oil tank; 2. an oil absorption filter screen; 3. a motor; 4. a hydraulic pump; 5. an overflow valve; 6. a first pressure compensating valve; 7. a second pressure compensating valve; 8. the first two-position two-way normally closed electromagnetic valve; 9. a second two-position two-way normally closed solenoid valve; 10. a pressure sensor; 11. an oil cylinder; 12. a throttle valve; 13. a one-way valve; 14. an emergency valve; 15. a power supply circuit; 16. a voltage transformation circuit; 17. a hydraulic oil path switching circuit; YA, a first hydraulic oil way; YA1 and a second hydraulic oil path.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
Example 1
Referring to fig. 1, the present embodiment discloses an embodiment of a hydraulic control system (hereinafter referred to as "system") for a vehicle lift.
Vehicle machine hydraulic control system that lifts, including oil tank 1, oil absorption filter screen 2, hydraulic pump 4, motor 3, first hydraulic pressure oil circuit and second hydraulic pressure oil circuit, hydraulic pump 4 is through 1 pump oil of oil tank 2 pump oil of oil absorption filter screen, motor 3 drive hydraulic pump 4, first hydraulic pressure oil circuit includes first pressure compensating valve 6 and first two-way normally closed solenoid valve 8, the second hydraulic pressure oil circuit includes second pressure compensating valve 7 and two-way normally closed solenoid valve 9 of second, 6 oil drainage volumes of first pressure compensating valve are greater than the oil drainage volumes of second pressure compensating valve 7.
It should be further explained that, referring to fig. 1, the vehicle lifting machine is provided with a first hydraulic oil path and a second hydraulic oil path, when the first hydraulic oil path and the second hydraulic oil path work simultaneously, the first pressure compensating valve 6 and the second pressure compensating valve 7 are not in a working state, no oil drainage quantity exists, the oil output of the hydraulic system is maximum, and the lifting machine is fast; because the oil drainage amount of the first pressure compensation valve 6 is greater than that of the second pressure compensation valve 7, when only the first hydraulic oil way works, the first pressure compensation valve 6 is in a working state and has a large oil drainage amount, the oil output of the hydraulic system is minimum, and the lifting machine is at a slow speed; when only the second hydraulic oil circuit works, the second pressure compensation valve 7 is in a working state, oil drainage quantity is small, oil output quantity of a hydraulic system is maximum, the lifting machine is at a medium speed, and three speeds of a high speed, a medium speed and a low speed are selected by switching work of the first hydraulic oil circuit and the second hydraulic oil circuit.
As a preferred embodiment, the hydraulic system further comprises an overflow valve 5, a pressure sensor 10, an oil cylinder 11, a throttle valve 12, a check valve 13 and an emergency valve 14; when the lifting machine is overloaded, the system is provided with an overflow valve 5, so that the safety of the system can be protected; the hydraulic pump 4 is also provided with a one-way valve 13, so that hydraulic oil is prevented from flowing backwards in the ascending process of the lifter, the gear pump is protected, and the safety of the hydraulic pump 4 in the system is improved; the pressure sensor 10 is arranged at an oil outlet of the system and can give an alarm or stop the lifting machine under the condition of overload; first two-way normally closed solenoid valve 8 and second two-way normally closed solenoid valve 9 all set up emergency valve 14, can realize opening emergency valve 14 and carry out the draining operation under emergency, can improve the security of system equally.
In order to when the lifting machine leaves the factory, satisfy the demand of user to lifting speed, can fix lifting speed of lifting machine, as long as select fast, intermediate speed and slow speed can, make one set of hydraulic system can satisfy three kinds of user demands of lifting speed, from hydraulic system's cost perspective, the development cost of different lifting speed lifting machine hydraulic system has been reduced by a wide margin, help improving hydraulic system's commonality, accelerate lifting machine's production efficiency, when the user needs the adjustment lifting speed, only need to change the setting of oil circuit and can realize.
Example 2
Referring to fig. 2, the present embodiment discloses an embodiment of a hydraulic control circuit (hereinafter referred to as "circuit") for a vehicle lift.
Referring to fig. 2, the hydraulic control circuit of the vehicle lifting machine includes a power supply circuit 15, a voltage transformation circuit 16 and a hydraulic oil path switch circuit 17, where the power supply circuit 15 includes a contactor KM and a contactor switch KA4, the contactor KM and the contactor switch KA4 are connected in series, the hydraulic oil path switch circuit 17 includes a first switch circuit and a second switch circuit, the first switch circuit includes switches KA1-1 and KA1-2 connected in series and the first hydraulic oil path described in any one of embodiments 1, the second switch circuit includes switches KA2-1 and KA2-2 connected in series and the second hydraulic oil path described in any one of embodiments 1, and the voltage transformation circuit 16 connects the power supply circuit 15 and the hydraulic oil path switch circuit 17.
It should be further noted that the circuit of embodiment 2 is a control circuit principle description of the system of embodiment 1, the power circuit 15 provides a power source for a motor of the hydraulic system, and after voltage transformation is performed by the voltage transformation circuit 16, the hydraulic oil path switching circuit 17 is controlled, specifically, the first switching circuit and the second switching circuit are controlled, the first switching circuit controls the first hydraulic oil path, and the second switching control circuit controls the second hydraulic oil path; when the first switch circuit and the second switch circuit are both electrified, the first hydraulic oil way and the second hydraulic oil way are both opened, the first pressure compensation valve 6 and the second pressure compensation valve 7 do not drain oil, the oil output of the hydraulic system is maximum, and the lifting speed is high; when the first switch circuit is powered on and the second switch circuit is powered off, the oil drainage quantity of the first pressure compensation valve 6 of the first hydraulic oil way is large, the oil outlet quantity of the hydraulic system is minimum, and the lifting speed is low; when the second switch circuit is powered on and the first switch circuit is powered off, the oil drainage quantity of a second pressure compensation valve 7 of the second hydraulic oil way is small, the oil outlet quantity of the hydraulic system is small, and the lifting speed is low; in order to remind that the lifting machine is in a working state, the first switch circuit is also connected with an indicator lamp in parallel.
The control circuit of this embodiment is an electrical principle of the control system of embodiment 1, and embodiment 2 is not described in detail with respect to the control system.
Example 3
This embodiment discloses a specific implementation manner of a vehicle lifter, which includes the vehicle lifter hydraulic control system according to embodiment 1 and the vehicle lifter hydraulic control circuit according to embodiment 2.
Through the embodiment, the technical effects are as follows:
the machine of lifting has had fast, medium speed and low-speed three-gear speed, both can possess when the same machine of lifting, also can be according to user's selection, keep one of them first speed or two-speed, make one set of hydraulic system can satisfy three kinds of user demand who lifts speed, from hydraulic system's cost perspective, the development cost of different machine hydraulic system that lifts speed has been reduced by a wide margin, help improving hydraulic system's commonality, accelerate the production efficiency of the machine of lifting, when the user needs the adjustment to lift speed, only need change the setting of oil circuit and can realize.
Claims (10)
1. Vehicle machine hydraulic control system that lifts, its characterized in that includes oil tank, oil absorption filter screen, hydraulic pump, motor, first hydraulic pressure oil circuit and second hydraulic pressure oil circuit, the hydraulic pump is through oil absorption filter screen pump oil from the oil tank, the motor drive hydraulic pump, first hydraulic pressure oil circuit includes first pressure compensation valve and first two-way normally closed solenoid valve, the second hydraulic pressure oil circuit includes second pressure compensation valve and two-way normally closed solenoid valve of second, first pressure compensation valve oil drainage volume is greater than the oil drainage volume of second pressure compensation valve.
2. The vehicle lift hydraulic control system of claim 1, wherein said hydraulic pump is provided with a check valve.
3. The hydraulic control system of a vehicle lift according to claim 1, further comprising an overflow valve, wherein the first two-position two-way normally closed solenoid valve and the second two-position two-way normally closed solenoid valve are both provided with emergency valves.
4. The vehicle lift hydraulic control system of claim 1, further comprising a cylinder and a throttle valve.
5. The vehicle lift hydraulic control system of any one of claims 1-4, wherein the control system further includes a pressure sensor disposed at the oil outlet.
6. The hydraulic control circuit of the vehicle lifting machine is characterized by comprising a power supply circuit, a voltage transformation circuit and a hydraulic oil circuit switch circuit, wherein the power supply circuit comprises a contactor KM and a contactor switch KA4, the contactor KM and the contactor switch KA4 are connected in series, the hydraulic oil circuit switch circuit comprises a first switch circuit and a second switch circuit, the first switch circuit comprises switches KA1-1 and KA1-2 which are connected in series and the first hydraulic oil circuit of any one of claims 1 to 5, the second switch circuit comprises switches KA2-1 and KA2-2 which are connected in series and the second hydraulic oil circuit of any one of claims 1 to 5, and the voltage transformation circuit is connected with the power supply circuit and the hydraulic oil circuit switch circuit.
7. The vehicle lift hydraulic control circuit of claim 6, wherein said first switching circuit is further connected in parallel with an indicator light.
8. The hydraulic control circuit of a vehicle lift according to claim 6, wherein when the first switch circuit and the second switch circuit are both energized, the first hydraulic circuit and the second hydraulic circuit are both open, the hydraulic system has the maximum oil output, and the lifting speed is fast.
9. The hydraulic control circuit of a vehicle lift according to claim 6, wherein when the first switch circuit is powered on and the second switch circuit is powered off, the first pressure compensating valve is activated, and since the oil drainage amount of the first pressure compensating valve of the first hydraulic line is large, the oil output amount of the hydraulic system is minimum, and the lifting speed is slow; when the second switch circuit is powered on and the first switch circuit is powered off, the oil drainage quantity of the second pressure compensation valve of the second hydraulic oil way is small, the oil outlet quantity of the hydraulic system is small, and the lifting speed is low.
10. A vehicle lift comprising a vehicle lift hydraulic control system according to any one of claims 1 to 5 and a vehicle lift hydraulic control circuit according to any one of claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110680371.9A CN113374761B (en) | 2021-06-18 | 2021-06-18 | Hydraulic control system and control circuit of vehicle lifter and lifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110680371.9A CN113374761B (en) | 2021-06-18 | 2021-06-18 | Hydraulic control system and control circuit of vehicle lifter and lifter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113374761A true CN113374761A (en) | 2021-09-10 |
| CN113374761B CN113374761B (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110680371.9A Active CN113374761B (en) | 2021-06-18 | 2021-06-18 | Hydraulic control system and control circuit of vehicle lifter and lifter |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011057436A (en) * | 2009-09-14 | 2011-03-24 | Sugiyasu Corp | Lift hydraulic circuit for vehicle maintenance |
| CN103693584A (en) * | 2013-12-23 | 2014-04-02 | 常熟通润汽车零部件股份有限公司 | Double shear lifter capable of compensating for height difference |
| CN204082724U (en) * | 2014-09-11 | 2015-01-07 | 宁波力达物流设备有限公司 | The hydraulic system of forklift |
| CN204386982U (en) * | 2014-12-31 | 2015-06-10 | 淮安威博液压有限公司 | A kind of lifting machine double pump hydraulic unloading power unit |
| CN207033867U (en) * | 2017-08-02 | 2018-02-23 | 奥莱特汽车科技有限公司 | A kind of double live hydraulic systems of Superthin scissor lift |
| CN207212799U (en) * | 2017-09-13 | 2018-04-10 | 广州高昌机电股份有限公司 | A kind of soft oil route controller of shearing type lifter |
| CN108317115A (en) * | 2018-04-09 | 2018-07-24 | 中山市颉榕汽车维修检测设备有限公司 | Shearing type lifter levelling device, hoisting system and shearing type lifter |
| CN207701491U (en) * | 2017-12-18 | 2018-08-07 | 无锡市德力流体科技有限公司 | Double speed down type hydraulic power unit |
| CN207795714U (en) * | 2017-12-29 | 2018-08-31 | 江苏威博液压股份有限公司 | A kind of lifting machine double pump power unit |
| CN110734000A (en) * | 2018-07-18 | 2020-01-31 | 中山市颉榕汽车维修检测设备有限公司 | PLC (programmable logic controller) controlled automatic leveling system for vehicle scissor lift |
-
2021
- 2021-06-18 CN CN202110680371.9A patent/CN113374761B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011057436A (en) * | 2009-09-14 | 2011-03-24 | Sugiyasu Corp | Lift hydraulic circuit for vehicle maintenance |
| CN103693584A (en) * | 2013-12-23 | 2014-04-02 | 常熟通润汽车零部件股份有限公司 | Double shear lifter capable of compensating for height difference |
| CN204082724U (en) * | 2014-09-11 | 2015-01-07 | 宁波力达物流设备有限公司 | The hydraulic system of forklift |
| CN204386982U (en) * | 2014-12-31 | 2015-06-10 | 淮安威博液压有限公司 | A kind of lifting machine double pump hydraulic unloading power unit |
| CN207033867U (en) * | 2017-08-02 | 2018-02-23 | 奥莱特汽车科技有限公司 | A kind of double live hydraulic systems of Superthin scissor lift |
| CN207212799U (en) * | 2017-09-13 | 2018-04-10 | 广州高昌机电股份有限公司 | A kind of soft oil route controller of shearing type lifter |
| CN207701491U (en) * | 2017-12-18 | 2018-08-07 | 无锡市德力流体科技有限公司 | Double speed down type hydraulic power unit |
| CN207795714U (en) * | 2017-12-29 | 2018-08-31 | 江苏威博液压股份有限公司 | A kind of lifting machine double pump power unit |
| CN108317115A (en) * | 2018-04-09 | 2018-07-24 | 中山市颉榕汽车维修检测设备有限公司 | Shearing type lifter levelling device, hoisting system and shearing type lifter |
| CN110734000A (en) * | 2018-07-18 | 2020-01-31 | 中山市颉榕汽车维修检测设备有限公司 | PLC (programmable logic controller) controlled automatic leveling system for vehicle scissor lift |
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| CN113374761B (en) | 2024-01-05 |
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