CN204324382U - A kind of wheeled double-power hydraulic drive system and use the timber grab of this drive system - Google Patents

Abstract

The utility model relates to a wheel-type dual-power hydraulic drive system and a log grab using the drive system. The wheel-type dual-power hydraulic drive system includes first and second hydraulic branches arranged in parallel. A first hydraulic pump and a first one-way valve are arranged in series on the branch road, the inlet of the first one-way valve is connected with the oil outlet of the first hydraulic pump, and the power input end of the first hydraulic pump is connected to an internal combustion engine through transmission; the second hydraulic pump A second hydraulic pump and a second one-way valve are arranged in series on the branch road, the inlet of the second one-way valve communicates with the oil outlet of the second hydraulic pump, and the power input end of the second hydraulic pump is connected with an electric motor through transmission. A wheeled dual-power hydraulic drive system of the utility model not only satisfies the need for greater power in the process of moving and loading and unloading wood, and because the power demand for loading and unloading wood at a designated position is small, it is driven by a motor and avoids the need for driving. Waste of power can greatly reduce the cost of use.

Description

A wheeled dual-power hydraulic drive system and a log grab using the drive system

technical field

The utility model relates to a wheel type dual-power hydraulic drive system and a log grab using the drive system.

Background technique

At present, due to the limited space of wood processing enterprises, raw materials that are overcharged during the peak season of wood felling need to be stacked and palletized using log grabbers. Chinese patent document CN202415090U discloses a log grab, including a mechanical car body, on which a lifting arm assembly and a hydraulic pump are installed, the power input end of the hydraulic pump is connected to a diesel engine, and the lifting arm assembly is far away from the mechanical car One end of the body is equipped with a grab bucket.

When the above-mentioned mechanical vehicle body moves to the designated position to start loading and unloading wood, the diesel engine drives the hydraulic pump to output hydraulic oil to control the lifting hydraulic cylinder installed on the boom assembly and the hydraulic pressure of the grab teeth installed on the two grab teeth of the grab bucket. The action of the cylinder to realize the various actions of loading and unloading wood of the boom assembly and the grab bucket. Due to the high fuel cost of diesel engines, this increases the use cost of log grabbers.

Contents of the invention

The purpose of the utility model is to provide a wheel-type dual-power hydraulic drive system to solve the technical problem of high cost of use caused by the diesel engine as the power device in the prior art. At the same time, the utility model also provides a log grab using the wheeled dual-power hydraulic drive system.

In order to achieve the above purpose, a wheeled dual-power hydraulic drive system of the present invention adopts the following technical proposal: a wheeled dual-power hydraulic drive system includes first and second hydraulic branches arranged in parallel, the first A first hydraulic pump and a first one-way valve are arranged in series on the hydraulic branch, the inlet of the first one-way valve communicates with the oil outlet of the first hydraulic pump, and the power input end of the first hydraulic pump is connected to an internal combustion engine; A second hydraulic pump and a second one-way valve are arranged in series on the second hydraulic branch, the inlet of the second one-way valve communicates with the oil outlet of the second hydraulic pump, and the power input end of the second hydraulic pump drives A motor is connected.

The internal combustion engine is a diesel engine.

Both the first and second hydraulic pumps are plunger hydraulic pumps.

A wood grabber of the utility model adopts the following technical scheme: a wood grabber, including a hydraulic drive system, the hydraulic drive system includes first and second hydraulic branches arranged in parallel, and the first hydraulic branch is arranged in series There are a first hydraulic pump and a first one-way valve, the inlet of the first one-way valve communicates with the oil outlet of the first hydraulic pump, and the power input end of the first hydraulic pump is connected to an internal combustion engine; the second hydraulic pressure A second hydraulic pump and a second one-way valve are arranged in series on the branch, the inlet of the second one-way valve communicates with the oil outlet of the second hydraulic pump, and the power input end of the second hydraulic pump is connected to a motor through transmission.

The log grabber also includes a vehicle frame equipped with traveling wheels, the driving wheels are driven by the internal combustion engine to travel, and the upper end of the vehicle frame is equipped with a rotary table whose rotation axis extends in the up and down direction. The first and second hydraulic pumps, the internal combustion engine, and the electric motor are all installed on the rotary action table, and a hydraulic motor that drives the rotary table to rotate around the axis of rotation of the rotary table is also installed on the rotary table. The first and second hydraulic branches are connected.

A boom assembly is also installed on the rotary table, and a lifting hydraulic cylinder for driving the boom assembly to lift timber is installed on the boom assembly, which communicates with the first and second hydraulic branches.

A grab is installed on the end of the boom assembly far away from the rotary table, and the grab is installed on the grab to communicate with the first and second hydraulic branches and is used to drive the opening and closing of the grab teeth of the grab. Gripper hydraulic cylinder.

The vehicle frame includes a fixed box frame, and the left and right crossbeams whose lengths all extend along the left and right directions are correspondingly worn on the left and right ends of the fixed box frame. The two ends respectively cooperate with the right end of the left beam and the left end of the right beam for guiding movement, and the rotary table is installed on the fixed box frame.

The fixed box frame is fixed with a left telescopic oil cylinder and a right telescopic oil cylinder whose length extends along the left and right directions, the piston rod of the left telescopic oil cylinder is hinged with the left beam, and the piston rod of the right telescopic oil cylinder is connected with the Right crossmember hinged.

A wood grabber of the utility model is provided with a hydraulic drive system. The hydraulic drive system includes first and second hydraulic branches arranged in parallel. The first hydraulic branch is provided with a first one-way valve and a first one-way The inlet of the valve is connected to the first hydraulic pump, and the second hydraulic branch is provided with a second one-way valve and a second hydraulic pump connected to the inlet of the second one-way valve. The power input end of the first hydraulic pump is connected with The power input end of the internal combustion engine and the second hydraulic pump is connected with an electric motor. This setting makes when the log grab is loading and unloading wood during the movement, the motor is powered off and the internal combustion engine operates. On the one hand, the internal combustion engine outputs power to drive the log grab. On the one hand, the first hydraulic pump is driven to output hydraulic oil. Since the second one-way valve is one-way locked, the second hydraulic branch is locked, and only the first hydraulic branch outputs hydraulic oil to complete the various actions of loading and unloading wood of the log grabber. . When the log grab moves to the designated position and starts loading and unloading wood, the diesel engine is turned off, the log grab stops moving, the electric motor starts to work, and the second hydraulic pump is driven to output hydraulic oil. Since the first check valve is one-way locked, the first hydraulic pressure The branch circuit is locked, so that only the second hydraulic branch circuit outputs hydraulic oil to complete the various actions of loading and unloading timber of the log grab. On the one hand, this setting satisfies the needs of large power for the log grabber in the process of moving and loading and unloading wood. On the other hand, because the power demand for loading and unloading wood at a designated position is small, it is driven by an electric motor and avoids the waste of driving force. Compared with the comparison file The middle log grab is always driven by a diesel engine, which can greatly reduce the cost of use. Furthermore, the above-mentioned hydraulic drive system has a simple structure, is convenient for production and processing, and is beneficial to reduce processing and manufacturing costs.

Further, the vehicle frame of the present utility model includes left and right crossbeams whose lengths all extend along the left and right directions. The left end is guided and moved. When this setting is in use, since the right end of the left beam telescopically moves at the left end of the fixed box frame, and the left end of the right beam telescopically moves at the right end of the fixed box frame, the telescopic movement of the left and right beams does not interfere with each other. This has just increased the telescopic length of left and right beams, helps to improve the stability of the log grab complete machine, has increased the application scope of a kind of log grab of the present utility model, is convenient to popularization and application.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of wood grabber of the present utility model;

Fig. 2 is a connection schematic diagram of the wheeled dual-power hydraulic drive system in Fig. 1;

Fig. 3 is the structural representation of vehicle frame among Fig. 1;

FIG. 4 is a top view of FIG. 3 .

Detailed ways

A wood grabber as shown in Figure 1-4, including a frame, on which a walking wheel 18 is installed, and a rotary table with a rotation axis extending in the up and down direction is installed on the upper end of the frame, on which a A hydraulic motor that drives the rotary platform to rotate around the rotation axis of the rotary platform.

The above-mentioned rotary table is also equipped with a boom assembly, the boom assembly includes a first boom 16 and a first lifting hydraulic cylinder 15, the piston rod of the first lifting hydraulic cylinder 15 is hinged to the middle of the first boom, The cantilever end of the first boom is hinged with a second boom 13, and the middle part of the first boom is also hinged with a second lifting hydraulic cylinder 17, and the piston rod of the second lifting hydraulic cylinder 17 is hinged on the second boom 13. In the middle of the second jib, the overhanging end of the second jib is hinged with a grab bucket 14. The above-mentioned grab bucket 14 includes two grabbing teeth and a grabbing tooth hydraulic cylinder corresponding to the two grabbing teeth. . Of course, in other embodiments, the above-mentioned boom assembly can also be provided with the number of booms and grabbing teeth according to specific conditions, and it is only necessary to set a grab bucket at the end of the boom assembly away from the rotary table.

Above-mentioned vehicle frame comprises fixed box frame 11, and the left end of fixed box frame is equipped with left crossbeam 10, and the right end of fixed box frame is equipped with right crossbeam 12, as shown in Figure 3, 4, the length of left and right crossbeam is all along The left and right beams are staggered in the left and right directions. The left end of the fixed box frame cooperates with the right end guide movement of the above-mentioned left beam, and the right end of the fixed box frame cooperates with the left end guide movement of the above-mentioned right beam. In this embodiment, the above-mentioned left and right beams are made of channel steel, and the above-mentioned fixed box frame has a square inner wall that cooperates with the guide movement of the upper and lower sides of the left and right beams. Of course, in other embodiments, the above-mentioned left and right crossbeams can also be of tubular structure, the right end of the left crossbeam is inserted with a guide pin shaft whose length extends along the up and down direction, and the left end of the above-mentioned fixed box frame is provided with a length along the left and right sides. Direction extends up and down through the guide groove of the fixed box frame, and the right end of the left crossbeam realizes the guiding movement cooperation with the left end of the fixed box frame by the guide pin and the guide groove.

The left end of the above-mentioned left beam is fixed with a left lifting leg 8, and the right end of the right beam is fixed with a right lifting leg. The structures of the left and right lifting legs are the same. The leg includes a fixed end that is fixedly connected with the left end of the left crossbeam. A lifting cylinder is hinged on the fixed end. The piston rod of the lifting cylinder is hinged with the fixed end. The action of the piston rod of the lifting cylinder drives the lifting of the corresponding fixed end to realize the lifting of the vehicle frame. Of course, in other embodiments, the above vehicle frame includes left and right outriggers and a fixed beam bridged between the left and right outriggers.

The above-mentioned fixed box frame 11 is also fixedly provided with a left telescopic oil cylinder 9 and a right telescopic oil cylinder. The lengths of the left and right telescopic oil cylinders all extend along the left and right directions. The piston rod is hinged with the above-mentioned right crossbeam 12. When in use, the left and right crossbeam can be moved left and right by controlling the telescopic action of the piston rod of the left telescopic oil cylinder, and then drive the left and right movement of the left elevating outrigger. Similarly, the telescopic action of the piston rod of the right telescopic oil cylinder can be realized. When the right beam and the right lifting leg move left and right, when the left lifting leg moves to the left and the right lifting leg moves to the right, the overturning point of the whole machine will become larger relative to the center of the whole machine, which is beneficial to improve the wood grabbing effect. machine stability.

The above-mentioned log grab also includes a hydraulic drive system. As shown in Figure 2, the hydraulic drive system includes first and second hydraulic branches arranged in parallel, and the first hydraulic pump 4 and the second hydraulic pump are arranged in series on the first hydraulic branch. The inlet of a one-way valve communicates with the oil outlet of the first hydraulic pump, and the power input end of the first hydraulic pump is connected with the internal combustion engine 1 through transmission.

A second hydraulic pump 3 and a second one-way valve 5 are arranged in series on the above-mentioned second hydraulic branch, the inlet of the second one-way valve communicates with the oil outlet of the second hydraulic pump, and the power input end of the second hydraulic pump drives Motor 2 is connected.

The above-mentioned first and second hydraulic pumps, the internal combustion engine and the electric motor are all installed on the above-mentioned rotary action platform. In this embodiment, the above-mentioned internal combustion engine is a diesel engine, and the above-mentioned first and second hydraulic pumps are both plunger-type hydraulic pumps. Certainly, in other embodiments, the above-mentioned internal combustion engine may also be a gasoline engine.

The above-mentioned hydraulic motor is connected with the first and second hydraulic branches, the above-mentioned first lifting hydraulic cylinder is connected with the first and second hydraulic branches, and the second lifting hydraulic cylinder is connected with the first and second hydraulic branches. In communication, the above-mentioned grabbing hydraulic cylinder is in communication with the first and second hydraulic branches.

In this embodiment, the above-mentioned hydraulic drive system also includes a multi-way reversing valve 7, the outlets of the above-mentioned first and second check valves are connected in series with the multi-way reversing valve 7, the above-mentioned hydraulic motor, two The gear-grabbing hydraulic cylinder, the first lifting hydraulic cylinder and the second lifting hydraulic cylinder are arranged in parallel and are all communicated with the multi-way reversing valve. Of course, in other embodiments, the multi-way reversing valve 7 can also be eliminated.

The utility model also provides a wheel-type dual-power hydraulic drive system, the structure of which is consistent with that of the above-mentioned hydraulic drive system, and will not be repeated here.

The working principle of the above-mentioned hydraulic drive system is: when the grab grabs wood and moves with the road wheels, the motor is powered off, and the output shaft of the diesel engine is connected to a transfer case. One power output shaft, wherein one power output shaft is connected with the driving wheel to drive the road wheel to move, and the other power output shaft is connected with the power input shaft of the first hydraulic pump 4, and the first hydraulic pump 4 starts to work and output hydraulic oil. After the hydraulic oil flows through the first one-way valve 6, part of it enters the multi-way reversing valve 7, and the other part flows to the second one-way valve 5. Since the second one-way valve 5 is one-way locked, the second hydraulic branch locks closed, the hydraulic oil can only enter the multi-way reversing valve 7, and supply oil to the hydraulic motor, the first and second lifting hydraulic cylinders and the two grabbing hydraulic cylinders to complete the rotation of the rotary platform driven by the hydraulic motor. The lifting hydraulic cylinder drives the first and second booms to go up and down, and the two grabbing hydraulic cylinders drive the opening and closing of the two grabbing teeth.

When the above-mentioned walking wheels move to the designated position and start loading and unloading wood, the diesel engine is turned off, the movement of the walking wheels is terminated, the electric motor starts to work, the second hydraulic pump 3 starts to work and output hydraulic oil, and the hydraulic oil flows through the second one-way valve 5 , one part enters the multi-way reversing valve 7, and the other part flows to the first one-way valve 6. Since the first one-way valve 6 is one-way locked and the first hydraulic branch is locked, the hydraulic oil can only enter the multi-way reversing valve. Valve 7 supplies oil to the hydraulic motor, the first and second lifting hydraulic cylinders and the two grabbing hydraulic cylinders to complete the rotation of the rotary platform driven by the hydraulic motor, and the first and second lifting hydraulic cylinders drive the first and second lifting hydraulic cylinders. The arm is raised and lowered, and the two gripper hydraulic cylinders drive the two grippers to open and close.

Claims (9)

1. A wheeled dual-power hydraulic drive system, characterized in that: comprising first and second hydraulic branches arranged in parallel, the first hydraulic branch is provided with a first hydraulic pump and a first one-way valve in series, The inlet of the first one-way valve communicates with the oil outlet of the first hydraulic pump, and the power input end of the first hydraulic pump is connected to the internal combustion engine; the second hydraulic branch is provided with a second hydraulic pump, a second A one-way valve, the inlet of the second one-way valve communicates with the oil outlet of the second hydraulic pump, and the power input end of the second hydraulic pump is connected to the electric motor through transmission. 2. A wheeled dual power hydraulic drive system according to claim 1, characterized in that: said internal combustion engine is a diesel engine. 3. A wheeled dual-power hydraulic drive system according to claim 1, characterized in that: the first and second hydraulic pumps are plunger hydraulic pumps. 4. A wood grabber, characterized in that: it includes a hydraulic drive system, the hydraulic drive system includes first and second hydraulic branches arranged in parallel, and the first hydraulic pump, the first hydraulic pump, and the first hydraulic branch are arranged in series on the first hydraulic branch. One-way valve, the inlet of the first one-way valve communicates with the oil outlet of the first hydraulic pump, and the power input end of the first hydraulic pump is connected to the internal combustion engine; A pump and a second one-way valve, the inlet of the second one-way valve communicates with the oil outlet of the second hydraulic pump, and the power input end of the second hydraulic pump is connected to a motor through transmission. 5. A log grab according to claim 4, characterized in that: said log grab also includes a vehicle frame equipped with traveling wheels, said traveling wheels are driven by said internal combustion engine to travel, said The upper end of the vehicle frame is equipped with a rotary table whose rotation axis extends in the vertical direction. The first and second hydraulic pumps, the internal combustion engine and the electric motor are all installed on the rotary table, and the rotary table is also equipped with a drive. The rotary table rotates around the rotary axis of the hydraulic motor, and the hydraulic motor communicates with the first and second hydraulic branches. 6. A log grab according to claim 5, characterized in that: a boom assembly is installed on the rotary table, and the boom assembly is installed with the first and second hydraulic support The lifting hydraulic cylinder used to drive the lifting arm assembly to lift timber is connected with each other. 7. A log grab according to claim 6, characterized in that: a grab is installed on the end of the boom assembly away from the rotary table, and the grab is installed with the first, The grab teeth hydraulic cylinders used to drive the grab teeth of the grab bucket are connected to the second hydraulic branches. 8. A wood grabber according to claim 5, 6 or 7, characterized in that: the vehicle frame includes a fixed box frame, and the left and right ends of the fixed box frame are correspondingly equipped with a wooden frame whose length extends along the left and right directions Left and right crossbeams, the left and right crossbeams are staggered in the left and right directions, the left and right ends of the fixed box frame are respectively matched with the right end of the left crossbeam and the left end of the right crossbeam for guiding movement, and the rotary table is installed on the on the fixed box frame mentioned above. 9. A log grab according to claim 8, characterized in that: the fixed box frame is fixed with a left telescopic oil cylinder and a right telescopic oil cylinder whose lengths extend along the left and right directions, and the piston of the left telescopic oil cylinder The rod is hinged with the left beam, and the piston rod of the right telescopic oil cylinder is hinged with the right beam.