CN213897299U - Variable-speed hydraulic system and electric loader - Google Patents
Variable-speed hydraulic system and electric loader Download PDFInfo
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- CN213897299U CN213897299U CN202022204159.9U CN202022204159U CN213897299U CN 213897299 U CN213897299 U CN 213897299U CN 202022204159 U CN202022204159 U CN 202022204159U CN 213897299 U CN213897299 U CN 213897299U
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Abstract
The utility model relates to a variable speed hydraulic system, in order to solve the problem how to set up the variable speed hydraulic system in the gearbox, the utility model discloses a variable speed hydraulic system and an electric loader are constructed, wherein the variable speed hydraulic system comprises a clutch arranged in the gearbox, a control valve connected with the clutch and used for controlling the clutch to disengage or engage, a triple pump, a pump driving motor used for driving the triple pump, and a motor pump; the oil inlet end of the triple pump is connected with the hydraulic oil tank, the pump port of the variable speed pump is connected with the oil inlet end of a hydraulic motor in the motor pump, and the oil outlet end of the hydraulic motor is connected with the hydraulic oil tank; the oil inlet end of a pump in the motor pump is communicated with the bottom of the gearbox through a pipeline, and the oil outlet end of the pump is communicated with the oil inlet end of the control valve through a pipeline and an oil filter. The utility model discloses variable speed hydraulic system adopts the connection configuration of variable speed pump-motor pump, has realized variable speed hydraulic system's fuel feeding, still makes things convenient for arranging of each part simultaneously.
Description
Technical Field
The utility model relates to a hydraulic system, more specifically say, relate to a variable speed hydraulic system and electronic loader.
Background
The power of the existing common loader is mostly internal combustion engine as power, the power source is from the engine, and the engine drives the gear box and various hydraulic pumps. The existing loader using the engine as a power source has the defects of energy conversion, low efficiency and the like.
In a power loader using an electric motor as a power source, a plurality of electric motors are generally distributed to drive a traveling system, a working hydraulic system, and the like, respectively, according to their functions. Therefore, the electric loader is more convenient to arrange on the power arrangement, meanwhile, each power source can work in a high-efficiency area, and the electric motor can be used for realizing the recycling of braking energy.
In the traditional loader using the engine as a power source, after the engine is started, whether the loader material is in a working state or not, and various pumps are all driven by the engine, so that a pressure pump of a hydraulic system is always in a working state when the engine starts, and pressure oil is provided for the hydraulic system. However, in the electric loader, the motor for driving the loader to travel is in a gap-operating state, and rotates only when the loader travels, and is in a non-traveling state, and the motor for travel driving is in a stopped state. However, in the case of the electric loader, the travel drive motor is in a stopped state, and a pressure oil source is still required for each hydraulic system, such as a hydraulic system for engaging and disengaging the clutch of the transmission. In the hydraulic system of the gear box, pressure oil is different from oil liquid in the working hydraulic system of the loader, the pressure oil of the hydraulic system in the gear box is extracted from the gear box, and system return oil returns to the gear box through a lubricating oil circuit in the gear box.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is how to set up the problem of variable speed hydraulic system in the gearbox, and provide a variable speed hydraulic system and electronic loader.
The utility model discloses a realize that the technical scheme of its purpose is like: the variable-speed hydraulic system is characterized by further comprising a triple pump, a pump driving motor and a motor pump, wherein the triple pump is composed of a hydraulic oil tank, a variable-speed pump, a steering pump and a working pump, and the pump driving motor is used for driving the triple pump; the oil inlet end of the triple pump is connected with the hydraulic oil tank, the pump port of the variable speed pump is connected with the oil inlet end of a hydraulic motor in the motor pump, and the oil outlet end of the hydraulic motor is connected with the hydraulic oil tank; the oil inlet end of a pump in the motor pump is communicated with the bottom of the gearbox through a pipeline, and the oil outlet end of the pump is communicated with the oil inlet end of the control valve through a pipeline and an oil filter. The utility model discloses in, variable speed hydraulic system is by motor drive trigeminy pump, and the variable speed pump drive motor pump in the trigeminy pump utilizes the pump among the motor pump to draw the gear oil in the gearbox as the joint of clutch in the gearbox and throw off with hydraulic oil. The utility model discloses in, variable speed hydraulic system adopts the connection configuration of variable speed pump-motor pump, has realized variable speed hydraulic system's fuel feeding, still makes things convenient for arranging of each part simultaneously.
The variable-speed hydraulic system further comprises an auxiliary pump, a rotating shaft of the auxiliary pump is connected with a gear shaft in the gearbox, and the auxiliary pump is connected with the pump in the motor pump in parallel. The auxiliary pump is connected in parallel with the pump in the motor pump and used for increasing the flow rate and jointly pumping the gearbox oil for controlling the connection and disconnection of the clutch.
The above variable speed hydraulic system further comprises a second oil filter provided on an oil suction line of an oil inlet end of the pump of the motor pump.
In the speed change hydraulic system, the speed change hydraulic system comprises two control valves, two clutches are arranged in the gearbox, the two clutches are respectively arranged on two input gear shafts of the gearbox, and each clutch is correspondingly connected with one control valve.
In the variable speed hydraulic system, the control valve comprises a one-way valve, a third oil filter and an electromagnetic valve which are sequentially connected in series, and an oil return end of the electromagnetic valve is connected with the lubricating oil way. Further, the control valve also comprises a safety valve, and the oil inlet end of the safety valve is connected with the oil outlet end of the one-way valve.
The variable-speed hydraulic system further comprises an energy accumulator, and the energy accumulator is connected with the oil outlet end of the one-way valve in the control valve through the electromagnetic switch valve.
The utility model discloses a realize that the technical scheme of its purpose is like: an electric loader is constructed which is characterized by the aforementioned variable speed hydraulic system.
Compared with the prior art, the utility model discloses in, variable speed hydraulic system adopts the connection configuration of variable speed pump-motor pump, has realized variable speed hydraulic system's fuel feeding, still makes things convenient for arranging of each part simultaneously.
Drawings
Fig. 1 is a schematic diagram of a variable speed hydraulic system according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a variable speed hydraulic system according to a second embodiment of the present invention.
Fig. 3 is a schematic diagram of a variable speed hydraulic system according to a third embodiment of the present invention.
Fig. 4 is a schematic diagram of a variable speed hydraulic system according to a fourth embodiment of the present invention.
Part names and serial numbers in the figure:
the hydraulic control system comprises a gearbox 1, a gearbox inner cavity 11, a clutch 12, a gear shaft 13, an auxiliary pump 14, a second clutch 15, a lubricating oil path 16, a second oil filter 17, a pump driving motor 2, a triple pump 3, a speed changing pump 31, a steering pump 32, a working pump 33, a hydraulic oil tank 4, a motor pump 5, a motor 51, a pump 52, an oil filter 6, a control valve 7, a second control valve 70, a one-way valve 71, a third oil filter 72, an electromagnetic valve 73, a safety valve 74, an energy accumulator 8, an electromagnetic switch valve 81, a first walking driving motor 91 and a second walking driving motor 92.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
The first embodiment.
Fig. 1 illustrates a variable speed hydraulic system of an electric loader. In the loader, the output end of a gearbox 1 is connected with a front axle and a rear axle of the loader through a transmission shaft, so that the walking drive of the loader is realized. The gearbox has two input shafts connected to a first travel drive motor 91 and a second travel drive motor 92, respectively.
The transmission hydraulic system in the embodiment comprises a clutch 12, a control valve 7, a triple pump 3, a pump driving motor 2, an electromagnetic switch valve 81, an accumulator 8, an oil filter 6, a second oil filter 17 and a hydraulic oil tank 4 which are arranged in a transmission case.
The clutch 12 is provided between an input shaft connected to the first travel drive motor 91 in the transmission case 1 and the input gear Z1. When the clutch is engaged, the first travel driving motor 91 and the second travel driving motor 92 jointly output torque to drive the front axle and the rear axle through the coupling action of the gears in the gearbox 1. When the clutch 12 is disengaged, the front axle and the rear axle are driven only by the second travel drive motor 92 via the transmission output torque.
The oil inlet end of the clutch 12 is connected with the oil outlet end of the control valve 7 through a pipeline. The control valve 7 includes a check valve 71, a third oil filter 72, a solenoid valve 73, and a relief valve 74. The check valve 71, the third oil filter 72 and the electromagnetic valve 73 are sequentially connected between the oil inlet end and the oil outlet end of the control valve 7, the oil inlet end of the relief valve 74 is connected with the oil outlet end of the check valve 71, and the oil outlet end of the relief valve 74 is connected with the lubricating oil passage 16 in the transmission. The solenoid valve 73 is a two-position three-way valve, and the oil return end thereof is connected to the lubricating oil passage 16 in the transmission. The accumulator 8 is connected to the oil outlet end of the check valve 71 via the electromagnetic on-off valve 81. When the pressure at the outlet end of the check valve 71 is greater than the pressure set by the relief valve 74, the relief valve overflows and the overflowing oil enters the lubrication passage 16. When the clutch is disconnected, the return oil in the clutch also enters the lubrication oil passage 16 through the oil return end of the solenoid valve 73. The oil in the lubricating oil path 16 flows to the accommodating space of the friction plate and the dual steel sheet of the clutch to cool and lubricate the friction plate and the dual steel sheet of the clutch.
The triple pump 3 is composed of a variable speed pump 31, a steering pump 32 and a working pump 33, and the triple pump 3 is driven by a pump driving motor 2. The steering pump 32 supplies oil to a steering system of the loader, and the working pump 33 supplies oil to a working hydraulic system of the loader for driving a boom cylinder, a bucket cylinder, or other accessories. The oil inlet end of each pump in the triple pump 3 is connected with the hydraulic oil tank 4.
The rotating shaft of the motor 51 in the motor pump 5 is rigidly connected with the rotating shaft of the pump 52, the oil inlet end of the motor 51 is connected with the oil outlet end of the variable speed pump 31 in the triple pump 3, the oil outlet end of the motor 51 in the motor pump is connected with the hydraulic oil tank 4, and the motor 51 is driven by the hydraulic oil output by the variable speed pump 31.
The oil inlet end of the pump 52 in the motor pump is connected with the second oil filter 17, and the transmission oil in the transmission 1 is sucked from the bottom of the transmission cavity 11. The oil outlet end of the pump 51 of the motor pump is connected to the oil inlet end of the control valve 7 through an oil filter 6.
In the speed-changing hydraulic system of the embodiment, the pump driving motor 2 drives the triple pump 3, the speed-changing pump 31 in the triple pump 3 sucks hydraulic oil from the hydraulic oil tank 4 and outputs the hydraulic oil to drive the motor 51 in the motor pump 5, and the motor in the motor pump 5 drives the pump 52 in the motor pump to rotate. The pump 52 in the motor pump sucks the gearbox oil in the gearbox from the bottom of the gearbox accommodating cavity 11, and the gearbox oil enters the pump 52 in the motor pump after being filtered by the second oil filter 17 and then is output by the pump. The transmission oil output from the pump 52 of the motor pump is filtered by the oil filter 6 and then enters the control valve 7, the control valve 7 can charge the accumulator 8 through the electromagnetic switch valve 81, and the accumulator 8 can also provide the control valve 7 with pressure oil for the combination of the clutch 12 through the electromagnetic switch valve 81. When the clutch is required to be engaged, the electromagnetic valve 73 in the control valve 7 is in the right position, and the control valve 7 outputs oil to engage the clutch 12; when the clutch needs to be disconnected, the electromagnetic valve 73 is in the left position, oil in the clutch 12 enters the lubricating oil path 16 through the electromagnetic valve 73, and the lubricating oil path 16 is guided to the clutch 12 through a pipeline to lubricate a friction plate and a dual steel plate of the clutch.
Example two.
As shown in fig. 2, compared with the first embodiment, the speed-changing hydraulic system in the present embodiment is different in that an auxiliary pump 14 is disposed on the transmission case 1, the auxiliary pump 14 is driven by a gear shaft 13 in the transmission case 1, the auxiliary pump 14 is connected in parallel with a pump 52 in the motor pump, the auxiliary pump 14 mainly functions to increase flow, and under a high-speed driving condition, the flow required by the working hydraulic system is small, so that the rotation speed of the pump driving motor 2 can be reduced, energy is saved, and the oil output by the auxiliary pump can increase the flow in the speed-changing hydraulic system to meet the speed-changing requirement.
Example three.
As shown in fig. 3, compared with the first embodiment, the hydraulic transmission system of the present embodiment is different in that a second clutch 15 is further provided in the transmission, the hydraulic transmission system further includes a second control valve 70, the clutch 12 is connected to the control valve 7, the second clutch 15 is connected to the second control valve 70, the oil outlet side of the oil filter 6 is connected to both the control valve 7 and the second control valve 70, and the accumulator 8 is connected to both the control valve 7 and the second control valve 70 via an electromagnetic opening/closing valve 81.
Example four.
As shown in fig. 4, compared with the embodiment, the variable speed hydraulic system in the present embodiment is different in that an auxiliary pump 14 is provided on the transmission case, the auxiliary pump 14 is driven by a gear shaft 13 in the transmission case 1, the auxiliary pump 14 is connected in parallel with a pump 52 in the motor pump, and the auxiliary pump 14 mainly functions to increase the flow rate.
Claims (8)
1. A speed change hydraulic system comprises a clutch arranged in a gearbox, a control valve connected with the clutch and used for controlling the clutch to be disengaged or engaged, and an oil return end of the control valve is connected with a lubricating oil path of the gearbox, and is characterized by further comprising a triple pump consisting of a hydraulic oil tank, a speed change pump, a steering pump and a working pump, a pump driving motor used for driving the triple pump, and a motor pump; the oil inlet end of the triple pump is connected with the hydraulic oil tank, the pump port of the variable speed pump is connected with the oil inlet end of a hydraulic motor in the motor pump, and the oil outlet end of the hydraulic motor is connected with the hydraulic oil tank; the oil inlet end of a pump in the motor pump is communicated with the bottom of the gearbox through a pipeline, and the oil outlet end of the pump is communicated with the oil inlet end of the control valve through a pipeline and an oil filter.
2. The variable speed hydraulic system of claim 1, further comprising an auxiliary pump having a shaft coupled to a gear shaft in the transmission, the auxiliary pump being coupled in parallel with the pump in the motor pump.
3. The variable speed hydraulic system according to claim 1, further comprising a second oil filter disposed on an oil suction line at an oil feed end of a pump of the motor pump.
4. The variable speed hydraulic system according to claim 1, wherein the variable speed hydraulic system comprises two control valves, two clutches are arranged in the variable speed case, the two clutches are respectively arranged on two input gear shafts of the variable speed case, and each clutch is correspondingly connected with one control valve.
5. The variable speed hydraulic system according to any one of claims 1 to 4, wherein the control valve comprises a check valve, a third oil filter, and a solenoid valve connected in series in this order, and a return end of the solenoid valve is connected to a lubrication oil passage.
6. The variable speed hydraulic system of claim 5, wherein the control valve further comprises a relief valve, an oil inlet end of the relief valve being connected to an oil outlet end of the check valve.
7. The variable speed hydraulic system of claim 5, further comprising an accumulator connected to the outlet port of the one-way valve in the control valve via a solenoid switch valve.
8. An electric loader characterized by having the variable speed hydraulic system of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022204159.9U CN213897299U (en) | 2020-09-30 | 2020-09-30 | Variable-speed hydraulic system and electric loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022204159.9U CN213897299U (en) | 2020-09-30 | 2020-09-30 | Variable-speed hydraulic system and electric loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213897299U true CN213897299U (en) | 2021-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022204159.9U Active CN213897299U (en) | 2020-09-30 | 2020-09-30 | Variable-speed hydraulic system and electric loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213897299U (en) |
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2020
- 2020-09-30 CN CN202022204159.9U patent/CN213897299U/en active Active
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