阅读说明：本技术 一种高空作业平台电液一体化驱动系统 (Electro-hydraulic integrated driving system of aerial work platform ) 是由 郑加海 陈晓菲 王洪林 郝长龙 李梦龙 于 2021-09-30 设计创作，主要内容包括：本发明属于液压系统领域,具体公开了一种高空作业平台电液一体化驱动系统,包括液压泵、油箱、转向系统和举升系统；所述液压泵由驱动电机进行驱动,液压泵一侧设置有油箱,且液压泵、驱动电机和油箱均集成与液压缸表面,液压泵输出端设置有单向阀A,液压泵为转向系统和提升系统提供动力源,并独立控制转向系统和提升系统；所述转向系统包括电磁换向阀A、单向阀B、液压缸大腔、电磁换向阀B和节流阀芯；本发明将液压泵、驱动电机、阀块和液压缸一体化设计,能够在狭小的空间布置驱动系统,实现紧凑型整机的设计,满足市场的使用需求,并且本发明的多个管路为共用通道,能够节省制造成本。(The invention belongs to the field of hydraulic systems, and particularly discloses an electro-hydraulic integrated driving system of an aerial work platform, which comprises a hydraulic pump, an oil tank, a steering system and a lifting system; the hydraulic pump is driven by a driving motor, an oil tank is arranged on one side of the hydraulic pump, the driving motor and the oil tank are integrated on the surface of the hydraulic cylinder, a one-way valve A is arranged at the output end of the hydraulic pump, and the hydraulic pump provides power sources for a steering system and a lifting system and independently controls the steering system and the lifting system; the steering system comprises an electromagnetic directional valve A, a one-way valve B, a large hydraulic cylinder cavity, an electromagnetic directional valve B and a throttle valve core; the hydraulic pump, the driving motor, the valve block and the hydraulic cylinder are integrally designed, a driving system can be arranged in a narrow space, the design of a compact whole machine is realized, the use requirement of the market is met, and the plurality of pipelines are shared channels, so that the manufacturing cost can be saved.)

1. The electro-hydraulic integrated driving system of the aerial work platform is characterized in that: the hydraulic lifting system comprises a hydraulic pump (1), an oil tank (3), a steering system and a lifting system; the hydraulic pump (1) is driven by a driving motor (2), an oil tank (3) is arranged on one side of the hydraulic pump (1), the driving motor (2) and the oil tank (3) are integrated with the surface of a hydraulic cylinder, a one-way valve A (4) is arranged at the output end of the hydraulic pump (1), and the hydraulic pump (1) provides power sources for a steering system and a lifting system and independently controls the steering system and the lifting system;

the steering system comprises an electromagnetic directional valve A (7), a one-way valve B (5), a hydraulic cylinder large cavity (15), an electromagnetic directional valve B (8) and a throttle valve core (10); the hydraulic control system is characterized in that the input end of the electromagnetic directional valve A (7) is connected with the hydraulic pump (1), the output end of the electromagnetic directional valve A (7) is connected with the one-way valve A (4), the output end of the one-way valve A (4) is connected with the large hydraulic cylinder cavity (15), and the large hydraulic cylinder cavity (15) is connected with the electromagnetic directional valve B (8) through the throttle valve core (10).

2. The electro-hydraulic integrated driving system of the aerial work platform as claimed in claim 1, wherein: the lifting system comprises an electromagnetic directional valve C (9), a throttle valve A (11), a one-way valve C (6), a hydraulic cylinder rodless cavity (16), a throttle valve B (12), an overflow valve A (13) and an overflow valve B (14); the overflow valve B (14) is arranged on one side of the hydraulic pump (1) and is connected with the check valve A (4) in parallel.

3. The electro-hydraulic integrated driving system of the aerial work platform as claimed in claim 2, wherein: one line of the input end of the electromagnetic directional valve C (9) is directly connected with the hydraulic pump (1) and the overflow valve B (14), the other line of the input end of the electromagnetic directional valve C (9) is connected with the hydraulic pump (1) and the overflow valve B (14) through the throttle valve B (12), the output end of the electromagnetic directional valve C (9) is respectively connected with the rodless cavity (16) of the hydraulic cylinder and the rod cavity (17) of the hydraulic cylinder through the two throttle valves A (11), and the two throttle valves A (11) are connected in parallel.

4. The electro-hydraulic integrated driving system of the aerial work platform as claimed in claim 3, wherein: a check valve C (6) is arranged between the throttle valve A (11) and the rodless cavity (16) and the rod cavity (17) of the hydraulic cylinder, the check valve C (6) is communicated with the oil tank (3), and an overflow valve A (13) is arranged between the check valve C (6) and the oil tank (3).

5. The electro-hydraulic integrated driving system of the aerial work platform as claimed in claim 1, wherein: the output pressure of the hydraulic pump (1) is 16Mpa, and the output flow of the hydraulic pump (1) is 2.25L/min.

6. The electro-hydraulic integrated driving system of the aerial work platform as claimed in claim 1, wherein: the regulating speed of the throttle valve core (10) is 1.0-1.3 mm/s.

Technical Field

The invention relates to the field of hydraulic systems, in particular to an electro-hydraulic integrated driving system of an aerial work platform.

Background

The hydraulic system of the existing scissor aerial work platform comprises actuating elements, a motor, a hydraulic pump, a hydraulic oil tank, a hydraulic main control valve and a steering device, wherein the actuating elements are connected and arranged at different positions of a vehicle body through pipelines; the lifting device, the locking valve block and other accessories are placed on the upper frame.

The hydraulic pump is driven by the motor, and flows through the steering oil cylinder through the main control valve to control the steering system, and the main control valve controls the lifting oil cylinder and the whole platform to lift through the lifting control valve. This control system has problems: most control elements are integrated on a lower vehicle control valve body, the control valve is large in size, the valve body is far away from a lifting cylinder and passes through a long pipeline, pressure loss exists, and lifting weight of a platform and the like is reduced. The control valve is bulky and has poor economy. The oil tank and the hydraulic pump are independent units, oil is absorbed and returned through the pipeline, the length of the pipeline is long, and the volume of the oil tank is large.

The whole steering system and the lifting system need to have larger flow difference, the same hydraulic pump provides pressure, an overflow valve is shared, the problem of oil temperature rise exists, an oil dispersion system needs to be configured independently, and the service life of the overflow valve is greatly reduced.

The existing hydraulic system has large design volume, and can only be placed on a lower vehicle; the compact complete machine of market demand can't install, and the complete machine can't satisfy the small-size type and use.

Disclosure of Invention

The invention aims to provide an electro-hydraulic integrated driving system of an aerial work platform, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an electro-hydraulic integrated driving system of an aerial work platform comprises a hydraulic pump, an oil tank, a steering system and a lifting system; the hydraulic pump is driven by a driving motor, an oil tank is arranged on one side of the hydraulic pump, the driving motor and the oil tank are integrated on the surface of the hydraulic cylinder, a one-way valve A is arranged at the output end of the hydraulic pump, and the hydraulic pump provides power sources for a steering system and a lifting system and independently controls the steering system and the lifting system;

the steering system comprises an electromagnetic directional valve A, a one-way valve B, a large hydraulic cylinder cavity, an electromagnetic directional valve B and a throttle valve core; the input end of the electromagnetic directional valve A is connected with the hydraulic pump, the output end of the electromagnetic directional valve A is connected with the one-way valve A, the output end of the one-way valve A is connected with the large cavity of the hydraulic cylinder, and the large cavity of the hydraulic cylinder is connected with the electromagnetic directional valve B through the throttle valve core.

Preferably, the lifting system comprises an electromagnetic directional valve C, a throttle valve A, a one-way valve C, a hydraulic cylinder rodless cavity, a throttle valve B, an overflow valve A and an overflow valve B; the overflow valve B is arranged on one side of the hydraulic pump and is connected with the check valve A in parallel.

Preferably, one line of the input end of the electromagnetic directional valve C is directly connected with the hydraulic pump and the overflow valve B, the other line of the input end of the electromagnetic directional valve C is connected with the hydraulic pump and the overflow valve B through the throttle valve B, the output end of the electromagnetic directional valve C is respectively connected with the rodless cavity of the hydraulic cylinder and the rod cavity of the hydraulic cylinder through the two throttle valves A, and the two throttle valves A are connected in parallel.

Preferably, a check valve C is arranged between the throttle valve A and a rodless cavity and a rod cavity of the hydraulic cylinder, the check valve C is communicated with the oil tank, and an overflow valve A is arranged between the check valve C and the oil tank.

Preferably, the output pressure of the hydraulic pump is 16Mpa, and the output flow of the hydraulic pump is 2.25L/min.

Preferably, the regulating speed of the throttle valve core is 1.0-1.3 mm/s.

Compared with the prior art, the invention has the beneficial effects that: the hydraulic pump, the driving motor, the valve block and the hydraulic cylinder are integrally designed, a driving system can be arranged in a narrow space, the design of a compact whole machine is realized, the use requirement of the market is met, and the plurality of pipelines are shared channels, so that the manufacturing cost can be saved.

Drawings

FIG. 1 is a circuit block diagram of the present invention as a whole;

in the figure: 1. a hydraulic pump; 2. a drive motor; 3. an oil tank; 4. a one-way valve A; 5. a check valve B; 6. a check valve C; 7. an electromagnetic directional valve A; 8. an electromagnetic directional valve B (8); 9. an electromagnetic directional valve C; 10. a throttle valve cartridge; 11. a throttle valve A; 12. a throttle valve B; 13. an overflow valve A; 14. an overflow valve B; 15. a hydraulic cylinder large cavity; 16. a rodless cavity of the hydraulic cylinder; 17. the hydraulic cylinder has a rod cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in FIG. 1; the invention provides an electro-hydraulic integrated driving system of an aerial work platform, which comprises a hydraulic pump 1, an oil tank 3, a steering system and a lifting system; the hydraulic pump 1 is driven by a driving motor 2, an oil tank 3 is arranged on one side of the hydraulic pump 1, the driving motor 2 and the oil tank 3 are integrated with the surface of a hydraulic cylinder, a one-way valve A4 is arranged at the output end of the hydraulic pump 1, the hydraulic pump 1 provides a power source for a steering system and a lifting system and independently controls the steering system and the lifting system, the output pressure of the hydraulic pump 1 is 16Mpa, and the output flow of the hydraulic pump 1 is 2.25L/min;

the steering system comprises an electromagnetic directional valve A7, a one-way valve B5, a hydraulic cylinder large cavity 15, an electromagnetic directional valve B8 and a throttle valve core 10; the input end of the electromagnetic directional valve A7 is connected with the hydraulic pump 1, the output end of the electromagnetic directional valve A7 is connected with the one-way valve A4, the output end of the one-way valve A4 is connected with the large hydraulic cylinder cavity 15, the large hydraulic cylinder cavity 15 is connected with the electromagnetic directional valve B8 through the throttle valve core 10, and the adjusting speed of the throttle valve core 10 is 1.0-1.3 mm/s.

The lifting system comprises a solenoid directional valve C9, a throttle valve A11, a check valve C6, a hydraulic cylinder rodless cavity 16, a throttle valve B12, an overflow valve A13 and an overflow valve B14; the overflow valve B14 is arranged on one side of the hydraulic pump 1 and is connected with the check valve A4 in parallel, one line of the input end of the electromagnetic directional valve C9 is directly connected with the hydraulic pump 1 and the overflow valve B14, the other line of the input end of the electromagnetic directional valve C9 is connected with the hydraulic pump 1 and the overflow valve B14 through the throttle valve B12, the output end of the electromagnetic directional valve C9 is respectively connected with the hydraulic cylinder rodless cavity 16 and the hydraulic cylinder rod cavity 17 through the two throttle valves A11, the two throttle valves A11 are connected in parallel, the check valve C6 is arranged between the throttle valve A11 and the hydraulic cylinder rodless cavity 16 and the hydraulic cylinder rod cavity 17, the check valve C6 is communicated with the oil tank 3, and the overflow valve A13 is arranged between the check valve C6 and the oil tank 3.

The working principle is as follows: after the hydraulic pump 1 absorbs oil in the oil tank 3, hydraulic oil passes through a one-way valve A4 to jointly provide 2.25L/Mmin and 16Mpa pressure for a steering system and a lifting system;

platform lifting process: hydraulic oil enters the electromagnetic directional valve A7 through the hydraulic pump 1 and the one-way valve A4, at the moment, the electromagnetic directional valve A7 works, the oil enters the large cavity 15 of the hydraulic cylinder through the one-way valve B5, so that the hydraulic cylinder drives the platform to lift, the stopping, sudden power failure or pipeline blasting at any position in the process cannot cause the platform to rapidly drop, and because the valve block and the hydraulic cylinder are integrated, an oil path fast channel is formed between the hydraulic pump 1 and the hydraulic cylinder, and the oil leakage condition cannot occur;

a platform descending process: the platform falls through self weight, oil enters the electromagnetic reversing valve B8 from the hydraulic cylinder, the electromagnetic reversing valve B8 works at the moment, the descending speed is regulated to 1.0-1.3 mm/s through the throttle valve core 10, the oil enters the oil tank 3 through the throttle valve core 10 to finish the descending process, and sudden power failure or valve block failure in the process can finish the reversing process through a mechanical wire drawing device of the electromagnetic reversing valve B8;

and (3) right steering process: hydraulic oil enters an electromagnetic directional valve C9 through a hydraulic pump 1 and a one-way valve A4, an overflow valve B14 is connected in parallel in the process, the oil speed can be adjusted, at the moment, the electromagnetic directional valve C9 works, the oil enters a hydraulic cylinder rodless cavity 16 through a left throttle valve A11 to finish the right turning process, and meanwhile, the oil in a hydraulic cylinder rod cavity 17 enters an oil tank 3 through a right throttle valve A11;

left steering process: hydraulic oil enters an electromagnetic directional valve C9 through a hydraulic pump 1 and a one-way valve A4, an overflow valve B14 is connected in parallel in the process, the oil speed can be adjusted, at the moment, the electromagnetic directional valve C works, the oil enters a rod cavity 17 of the hydraulic cylinder through a right throttle valve A11 to finish the left turning process, and meanwhile, the oil in a rodless cavity 16 of the hydraulic cylinder enters an oil tank 3 through a left throttle valve A11;

in the left steering process and the right steering process, the rodless cavity 16 of the hydraulic cylinder is communicated with the rod cavity 17 of the hydraulic cylinder, and the rodless cavity and the rod cavity of the hydraulic cylinder both return to the tank 3 through the overflow valve A13 through two check valves C6 which are installed in opposite directions.

It is worth noting that: the whole device is controlled by the master control button, and the equipment matched with the control button is common equipment, so that the device belongs to the prior art, and the electrical connection relation and the specific circuit structure of the device are not repeated.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.