CN115750485A - Hydraulic system of bamboo cutting machine head and control method - Google Patents

Abstract

The invention provides a hydraulic system of a bamboo cutting machine head, which relates to the technical field of bamboo cutting equipment and comprises the following components: the saw blade hydraulic control system comprises a hydraulic oil source, a saw blade motor, a first oil cylinder, a second oil cylinder, a flow dividing valve, a first reversing valve, a second reversing valve and a third reversing valve. Wherein, the saw blade motor is used for driving the circular saw to rotate and cut the bamboo. The first oil cylinder is used for driving the material pushing clamping arm to move. The second oil cylinder is used for driving the collecting clamping arm to move. The flow divider valve is provided with an oil inlet, a first oil outlet and a second oil outlet; wherein, the oil inlet is connected with the hydraulic oil source through a pipeline. The first reversing valve is used for controlling the starting and stopping of the saw blade motor. The second reversing valve is used for controlling the extension and contraction of the first oil cylinder. The third reversing valve is arranged between the second oil outlet of the flow dividing valve and the second oil cylinder and used for controlling the second oil cylinder to stretch. The application provides a mechanized equipment of cutting down bamboo.

Description

Hydraulic system of bamboo cutting machine head and control method

Technical Field

The application relates to the technical field of bamboo cutting equipment, in particular to a hydraulic system of a bamboo cutting machine head and a control method.

Background

At present, the bamboo cutting level in China is still more original, and bamboo forest cutting equipment developed in recent years mainly comprises a grapple shear, a grapple saw and an electric bamboo cutting shear, can only realize the cutting of one bamboo at one time, has low operation efficiency and poor cutting effect, and cannot meet the use requirement of the bamboo. Therefore, the current market urgently needs to provide a mechanical felling equipment scheme to reduce the labor intensity and improve the labor production efficiency.

Disclosure of Invention

The technical problem that this application will solve lies in, to the above-mentioned not enough of prior art, provides a hydraulic system and control method of felling bamboo aircraft nose.

A hydraulic system of a bamboo cutting machine head comprises a machine head frame with a material collecting notch, a circular saw for cutting off bamboos, a material pushing clamping arm and a material collecting clamping arm; the material pushing clamp arms are used for pushing the cut bamboo into the material collecting notch; the collecting clamp arms are used for being matched with the machine head frame to clamp the bamboo pushed into the collecting notch by the pushing clamp arms; the hydraulic system includes:

a source of hydraulic oil;

the saw blade motor is used for driving the circular saw to rotate to cut the bamboo;

the first oil cylinder is used for driving the material pushing clamping arm to move;

the second oil cylinder is used for driving the collecting clamp arm to move;

the flow divider is provided with an oil inlet, a first oil outlet and a second oil outlet; the oil inlet is connected with a hydraulic oil source through a pipeline;

the first reversing valve is arranged between the first oil outlet of the flow dividing valve and the saw blade motor and used for controlling the start and stop of the saw blade motor;

the second reversing valve is arranged between the second oil outlet of the flow dividing valve and the first oil cylinder and used for controlling the extension and retraction of the first oil cylinder;

and the third reversing valve is arranged between the second oil outlet of the flow dividing valve and the second oil cylinder and used for controlling the extension and contraction of the second oil cylinder.

In one technical scheme, the first reversing valve is provided with a first oil port, a second oil port, a third oil port and a fourth oil port; when the valve core of the first reversing valve is located at the first working position, the first oil port is communicated with the third oil port, and the second oil port is communicated with the fourth oil port; when the valve core of the first reversing valve is located at the second working position, the first oil port is not communicated with the third oil port, the second oil port is not communicated with the fourth oil port, and the first oil port is communicated with the second oil port;

the first oil port of the first reversing valve is connected with the first oil outlet pipeline of the flow divider valve, the second oil port is connected with the oil tank pipeline, the third oil port is connected with the oil inlet pipeline of the saw blade motor, and the fourth oil port is connected with the oil outlet pipeline of the saw blade motor.

In one technical scheme, an oil inlet of the saw blade motor is also connected to an oil tank through a one-way valve; wherein, the oil inlet of the one-way valve is connected with one end of the oil tank, the oil outlet is connected with one end of the saw blade motor.

In one technical scheme, the first oil outlet of the flow dividing valve is also connected to an oil tank through a first overflow valve pipeline;

the oil outlet of the saw blade motor is also connected to an oil tank through a second overflow valve pipeline.

In one aspect, the second directional control valve includes: a fifth oil port, a sixth oil port, a seventh oil port and an eighth oil port; when the valve core of the second reversing valve is located at the first working position, the fifth oil port is communicated with the seventh oil port, and the sixth oil port is communicated with the eighth oil port; when the valve core of the second reversing valve is located at the second working position, the fifth oil port is communicated with the eighth oil port, and the sixth oil port is communicated with the seventh oil port; when the valve core of the second reversing valve is located at the third working position, all the oil ports are not communicated; the fifth oil port of the second reversing valve is connected with the second oil outlet of the flow divider valve through a pipeline, the sixth oil port is connected with an oil tank through a pipeline, the seventh oil port is connected with a rod cavity of the first oil cylinder through a pipeline, and the eighth oil port is connected with a rodless cavity of the first oil cylinder through a pipeline;

the third direction valve includes: a ninth oil port, a tenth oil port, an eleventh oil port and a twelfth oil port; when the valve core of the third reversing valve is located at the first working position, the ninth oil port is communicated with the eleventh oil port, and the tenth oil port is communicated with the twelfth oil port; when the valve core of the third reversing valve is located at the second working position, the ninth oil port is communicated with the twelfth oil port, and the tenth oil port is communicated with the eleventh oil port; when the valve core of the third reversing valve is positioned at the third working position, all the oil ports are not communicated; the ninth oil port of the third reversing valve is connected with the second oil outlet of the flow divider valve through a pipeline, the tenth oil port is connected with an oil tank through a pipeline, the eleventh oil port is connected with a rod cavity of the second oil cylinder through a pipeline, and the twelfth oil port is connected with a rodless cavity of the second oil cylinder through a pipeline.

In one technical scheme, the second oil outlet of the flow dividing valve is also connected to an oil tank through a fourth reversing valve; when the fourth reversing valve is positioned at the first working position, the second oil outlet of the flow dividing valve is communicated with the oil tank; when the fourth reversing valve is positioned at the second working position, the second oil outlet of the flow dividing valve is not communicated with the oil tank;

and the second oil outlet of the flow divider is also connected to an oil tank through a third overflow valve pipeline.

In one aspect, the method further comprises: the device comprises a first pressure sensor, a second pressure sensor, a rotating speed sensor, a first travel switch and a second travel switch; the first pressure sensor is used for measuring the working pressure of the saw blade motor; the second pressure sensor is used for measuring the working pressure of the first oil cylinder and the second oil cylinder; the rotating speed sensor is used for measuring the rotating speed of the saw blade motor; the first travel switch is used for measuring whether the first oil cylinder retracts to the right position or not; and the second travel switch is used for measuring whether the second oil cylinder retracts to the right position or not.

On the other hand, the application also provides a control method of the bamboo cutting machine head, the control method is applied to the hydraulic system provided by the above part, and the control method comprises the steps of automatically collecting materials:

adjusting a second reversing valve to enable the first oil cylinder to retract and drive the material pushing clamping arm to be in an open state; adjusting a third reversing valve to enable a second oil cylinder to extend out and drive the collecting clamp arm to a clamping state;

adjusting the first reversing valve to enable the saw blade motor to rotate, so that the circular saw is driven to rotate to cut off the bamboo;

adjusting a second reversing valve to enable the first oil cylinder to extend out so as to drive the material pushing clamping arm to push the sawn bamboo into the material collecting notch;

adjusting a third reversing valve to enable the second oil cylinder to retract so as to drive the collecting clamp arm to be in an open state, and then adjusting the third reversing valve again to enable the second oil cylinder to extend so as to drive the collecting clamp arm to be in a clamping state;

and adjusting the second reversing valve again to enable the first oil cylinder to retract and drive the material pushing clamping arm to be in an open state.

In one technical scheme, the control method comprises the following steps of automatic discharging:

adjusting the first reversing valve to stop the saw blade motor from rotating;

adjusting a second reversing valve to enable the first oil cylinder to retract and drive the material pushing clamping arm to be in an opening state;

and adjusting the third reversing valve to enable the second oil cylinder to retract so as to drive the collecting clamp arm to be in an open state.

In a technical scheme, the saw blade motor drives the circular saw to rotate and saw off the bamboo, and the process specifically comprises the following steps:

when the load pressure of the saw blade motor is detected to be increased, the rotating speed of an engine of an oil source is controlled to be increased, so that the oil flow for driving the saw blade motor is increased;

when the load pressure of the saw blade motor is detected to be reduced, the rotating speed of an engine of the oil source is controlled to be reduced, and therefore the oil flow for driving the saw blade motor is reduced.

The application provides a be applied to hydraulic system of felling bamboo aircraft nose, stop through opening of first switching-over valve control saw bit motor, through the flexible of first hydro-cylinder of second switching-over valve control, through the flexible of third switching-over valve control second hydro-cylinder, control the circular saw respectively, push away the material arm lock, the cooperation of collection material arm lock is carried out the action, and then through the circular saw, push away the material arm lock, the cooperation of the action between the collection material arm lock realizes automatic felling the bamboo forest. Therefore, the application provides an equipment scheme that can mechanized felling, has alleviateed artifical intensity of labour, has improved work production efficiency.

Drawings

FIG. 1 is a schematic structural diagram of a hydraulic system of a felling bamboo machine head in an embodiment of the application.

Fig. 2 is a schematic structural diagram of a felling bamboo machine head in the embodiment of the application.

FIG. 3 is another schematic structural diagram of a felling bamboo machine head in an embodiment of the present application.

FIG. 4 is a schematic structural diagram of a bamboo cutting device in the embodiment of the application.

FIG. 5 is a flow chart of a control method of a felling bamboo machine head in an embodiment of the present application.

FIG. 6 is a second flowchart of a method for controlling a felling machine head in an embodiment of the present application.

Fig. 7 is a third flowchart of a control method of a felling bamboo machine head in the embodiment of the present application.

Detailed Description

The following are specific embodiments of the present application and are further described with reference to the drawings, but the present application is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided only to facilitate a thorough understanding of embodiments of the present application. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The application provides a hydraulic system of felling bamboo aircraft nose. Referring to fig. 2 to 4, the bamboo cutting head comprises a headstock 10 with a collecting notch 11, a circular saw 40 for cutting bamboo, a pushing and clamping arm 20, a collecting and clamping arm 30; the material pushing clamping arms 20 are used for pushing the cut bamboo into the material collecting notch; the skidder arm 30 is used to cooperate with the headstock 10 to clamp the bamboo pushed into the skidder notch 11 by the pusher arm 20. The structure of the felling machine head will be described with reference to fig. 2 to 4.

Referring to fig. 2 to 4, the felling machine head includes a headstock 10, a circular saw 40, a material pushing and clamping arm 20, a material collecting and clamping arm 30, a first driving source, and a second driving source. The headstock 10 is provided with a material collecting recess 11 capable of accommodating a plurality of bamboos. The circular saw 40 is used to cut the bamboo. Pusher arms 20 are mounted on headstock 10 for pushing severed bamboo into gathering notches 11. A skidder arm 30 is mounted on the headstock 10 for cooperating with the headstock 10 to hold the bamboo pushed into the skidder notch 11 by said pusher arm 20. The first driving source is used for driving the pushing clamp arm 20 to move. The second driving source is used for driving the collecting clamping arm 30 to move. The circular saw 40 is located below the material pushing clamping arm 20 and the material collecting clamping arm 30.

In the present embodiment, a circular saw 40 is provided near the bottom of the headstock 10 and is used to cut bamboo from its root. The circular saw drives the saw blade to rotate to do work through the saw blade motor, and the saw blade rotating at a high speed horizontally cuts off the bamboo.

After the circular saw 40 cuts the bamboo, the first driving source drives the pusher arm 20 to push the cut bamboo into the gathering notch 11. In a specific example, the first drive source is a hydraulic cylinder. The bamboo collecting notch 11 on the headstock 10 can accommodate and place a plurality of bamboos during the operation of the device, therefore, the pushing clamp arm 20 can push the plurality of bamboos into the bamboo collecting notch 11 in sequence during the operation, thereby realizing the continuous mechanical felling and collecting of the plurality of bamboos.

During operation of the apparatus, the gathering arm 30 cooperates with the headstock 10 to hold the bamboo pushed into the gathering notch 11 by said pusher arm 20. Specifically, each time the pushing arms 20 push a bamboo into the collecting notch 11, after the bamboo enters the collecting notch 11, the pushing arms 20 retreat, and a bamboo is added into the collecting notch 11. In the process of pushing the bamboo into the bamboo collection notch 11 one by the pushing clamp arm 20, the collection clamp arm 30 can be continuously moved and adjusted to keep all the bamboos in a clamped state all the time.

In some embodiments, pusher arm 20 is rotatably mounted to headstock 10; the skidder arm 30 is rotatably mounted on the headstock 10. The first driving source is a hydraulic cylinder which can drive the material pushing clamping arm 20 to rotate relative to the headstock 10; the second driving source is a hydraulic cylinder capable of driving the skidder arm 30 to rotate relative to the headstock 10. The second drive source acts on the gathering arms 30 to press the bamboo in the gathering notches 11, and in this state, when the pushing arms 20 push the bamboo into the gathering notches 11 again, the bamboo is pressed between the backs of the gathering arms 30 and the pushing arms 20, and the gathering arms 30 are clamped between the bamboo on both sides. At this time, the collecting arm 30 is driven by the second driving source to be drawn out from the bamboo, and presses all the bamboos from the outside again, thereby completing the felling and collecting of one bamboo. The circular saw 40, the pushing clamping arm 20 and the collecting clamping arm 30 can be matched with each other to realize the felling and collection of a plurality of bamboos.

Further, the collecting clamp arm 30 comprises a first knuckle arm 31 and a second knuckle arm 32; wherein, the first joint arm 31 is rotatably mounted on the headstock 10; the second driving source is used for driving the first joint arm 31 to rotate relative to the headstock 10; the second arm section 32 is movably mounted on the first arm section 31, and a spring 33 is arranged between the first arm section and the second arm section for connecting, so that the second arm section 32 is kept at a preset extending angle; when the collecting clamping arm 30 rotates and opens towards the side far away from the collecting notch 11, the second section arm 32 can be forced to reversely rotate against the elastic force of the spring 33. A hinged and spring connection is provided between the first knuckle arm 31 and the second knuckle arm 32. The hinged relationship may allow the second pitch arm 32 to rotate relative to the first pitch arm 31, and the spring connection serves to maintain the second pitch arm 32 at a preset extension angle in a free state.

When the driving skidder arms 30 of the second driving source press the bamboo in skidder pocket 11, the front of second knuckle arm 32 facing skidder pocket 11 is subjected to a reaction force, and at this time, first knuckle arm 31 and second knuckle arm 32 are locked in a limited manner with each other, and second knuckle arm 32 is held at a predetermined extension angle and pressed against the bamboo. When the skidded timber clamping arms 30 are driven by the second driving source to be drawn out of the bamboo, the skidded timber clamping arms 30 rotate and open towards the side far away from the skidded timber notch 11, the reverse side of the second section arms 32 back to the skidded timber notch 11 is subjected to the reaction force of the bamboo, and at the moment, the second section arms 32 are forced to overcome the elastic force of the springs 33 to reversely rotate, so that the skidded timber can be drawn out of the bamboo, and all the bamboo can be clamped again from the periphery.

In a specific example, the pushing clamp arms 20 and/or the collecting clamp arms 30 are provided with soft pads for bamboo contact, and the soft pads can increase the contact area in the process that the pushing clamp arms 20 and/or the collecting clamp arms 30 contact the bamboo stem and provide certain buffering, so that the bamboo is prevented from being damaged.

Further, the feller head is also provided with an overload alarm for alarming when the circular saw 40 is overloaded. The overload alarm can give an alarm when the rotating speed of the circular saw is too low. In some specific examples, the overload alarm is an audible alarm, a vibratory alarm, or a light alarm. Further, the overload alarm can also signal the main machine to take action to exit the overload condition when the circular saw 40 is overloaded.

In the embodiment of the application, after the circular saw cuts off bamboo, the pushing clamp arms push the cut bamboo into the collecting concave opening, and the collecting clamp arms are matched with the machine head frame to clamp the bamboo pushed into the collecting concave opening by the pushing clamp arms; can hold many bamboos in the skidding notch, consequently, push away material arm lock and can push away many bamboos in proper order in the skidding notch to can realize that the mechanization is felled and collects many bamboos in succession, show ground and improve the efficiency of felling the bamboo.

Referring to fig. 4, the embodiment of the present application further provides a bamboo cutting device, which includes a walking chassis 50, an arm support 60, and a bamboo cutting machine head. Wherein the arm support 60 is mounted on the walking chassis 50. The bamboo cutting machine head is arranged at the tail end of the arm support 60. In one particular example, the bamboo cutting head is attached to the end of the arm 60 by a quick connector 70.

The walking chassis 50 can be a crawler chassis suitable for walking and moving in bamboo groves, and the arm support 60 can comprise a plurality of joint arms for adjusting the position of the bamboo cutting machine head.

The bamboo cutting machine head can be integrally and quickly installed and replaced through the quick connector 70, the existing equipment is used as power and a walking device, and equipment cost is reduced. The traveling chassis 50 may be embodied as a shovel, a loader, an all-terrain vehicle, a skid steer loader, or the like. The quick connector, also called a quick-change connector and a quick connector, is used for realizing the quick connection between the arm support 60 and the bamboo cutting machine head, the principle is similar to that of a quick-change connector of an excavator, and the prior art can be referred to, and the description is omitted here.

Referring to fig. 1, the hydraulic system includes: a hydraulic oil source 101, a saw blade motor 102, a first oil cylinder 103, a second oil cylinder 104, a flow dividing valve 105, a first reversing valve 106, a second reversing valve 107 and a third reversing valve 108. Wherein, the blade motor 102 is used for driving the circular saw to rotate to cut bamboo. The first oil cylinder 103 is used for driving the pushing clamping arm to move. The second oil cylinder 104 is used for driving the collecting clamping arm to move. The flow divider 105 has an oil inlet, a first oil outlet, and a second oil outlet; wherein, the oil inlet is connected with the hydraulic oil source 101 through a pipeline. A first diverter valve 106 is arranged between the first oil outlet of the diverter valve 105 and the blade motor 102 for controlling the start-stop of the blade motor 102. The second direction valve 107 is arranged between the second oil outlet of the flow dividing valve 105 and the first oil cylinder 103, and is used for controlling the expansion and contraction of the first oil cylinder 103. The third direction valve 108 is arranged between the second oil outlet of the flow dividing valve 105 and the second oil cylinder 104, and is used for controlling the extension and contraction of the second oil cylinder 104.

In a specific example, the bamboo cutting machine head is provided with an independent hydraulic and control system, the hydraulic oil source of the cutting machine is used for controlling each action of the bamboo cutting machine head, and a complete bamboo cutting device is formed by additionally installing the bamboo cutting machine head on the cutting machine, so that the actions of cutting, grabbing, collecting, discharging and the like of the bamboo can be realized.

In the hydraulic system, the controller controls the start and stop of the saw blade motor 102 through the first reversing valve 106, controls the extension and retraction of the first oil cylinder 103 through the second reversing valve, controls the extension and retraction of the second oil cylinder 104 through the third reversing valve, respectively controls the circular saw, the material pushing clamping arm and the material collecting clamping arm to be matched and execute actions, and further realizes automatic bamboo forest cutting through the action matching among the circular saw, the material pushing clamping arm and the material collecting clamping arm.

Referring specifically to fig. 1, the first directional valve 106 has a first port p1, a second port p2, a third port p3, and a fourth port p4; when the valve core of the first reversing valve 106 is located at the first working position, the first oil port p1 is communicated with the third oil port p3, and the second oil port p2 is communicated with the fourth oil port p4; when the valve core of the first reversing valve 106 is located at the second working position, the first oil port p1 is not communicated with the third oil port p3, the second oil port p2 is not communicated with the fourth oil port p4, and the first oil port p1 is communicated with the second oil port p 2; the first oil port p1 of the first reversing valve 106 is connected with a first oil outlet pipeline of the flow divider valve 105, the second oil port p2 is connected with an oil tank pipeline, the third oil port p3 is connected with an oil inlet pipeline of the saw blade motor 102, and the fourth oil port p4 is connected with an oil outlet pipeline of the saw blade motor 102. Referring to FIG. 1, the first direction valve 106 is a two-position, two-way direction valve. The first direction valve 106 is an electrically controlled valve and is electrically connected to a controller, and the controller can control the first direction valve 106 to switch between the first working position and the second working position.

Specifically, when the valve core of the first direction valve 106 is located at the first working position, the first oil port p1 is communicated with the third oil port p3, the second oil port p2 is communicated with the fourth oil port p4, and the pressure oil output from the first oil outlet of the flow dividing valve 105 passes through the first direction valve 106 and then is injected into the saw blade motor 102 from the oil inlet to drive the saw blade motor 102 to rotate. When the valve core of the first reversing valve 106 is located at the second working position, the first oil port p1 is not communicated with the third oil port p3, the second oil port p2 is not communicated with the fourth oil port p4, the first oil port p1 is communicated with the second oil port p2, pressure oil output from the first oil outlet of the flow dividing valve 105 directly returns to the oil tank after passing through the first reversing valve 106, the pressure oil does not pass through the saw blade motor 102, and the saw blade motor 102 does not operate.

With continued reference to FIG. 1, the oil inlet of the blade motor 102 is also connected to an oil tank through a one-way valve 109; wherein, the oil inlet of the check valve 109 is connected with one end of the oil tank, and the oil outlet is connected with one end of the saw blade motor 102. Further, the first oil outlet of the flow dividing valve 105 is also connected to the oil tank through a first overflow valve 110 by a pipeline; the oil outlet of the saw blade motor 102 is also connected to an oil tank through a second overflow valve 111. When the blade motor 102 is in normal state, the first overflow valve 110 limits the highest pressure, and the system is prevented from overload damage. When the valve core of the first reversing valve 106 is adjusted from the first working position to the second working position, due to inertia of the saw blade, the saw blade motor 102 continues to rotate under the driving of the saw blade, at this time, the oil inlet of the saw blade motor 102 is replenished with oil from the oil tank, the oil in the oil tank is injected into the oil inlet of the saw blade motor 102 through the check valve 109, at this time, the oil path of the saw blade motor 102 limits the highest pressure through the second overflow valve 111, and the saw blade motor 102 decelerates under the pressure until the saw blade motor stops rotating.

With continued reference to fig. 1, the second direction valve 107 includes: a fifth oil port p5, a sixth oil port p6, a seventh oil port p7 and an eighth oil port p8; when the valve core of the second reversing valve 107 is located at the first working position, the fifth oil port p5 is communicated with the seventh oil port p7, and the sixth oil port p6 is communicated with the eighth oil port p8; when the valve core of the second reversing valve 107 is located at the second working position, the fifth oil port p5 is communicated with the eighth oil port p8, and the sixth oil port p6 is communicated with the seventh oil port p 7; when the valve core of the second reversing valve 107 is located at the third working position, all the oil ports are not communicated; the fifth oil port p5 of the second reversing valve 107 is connected with the second oil outlet pipeline of the flow dividing valve 105, the sixth oil port p6 is connected with the oil tank pipeline, the seventh oil port p7 is connected with the rod cavity pipeline of the first oil cylinder 103, and the eighth oil port p8 is connected with the rodless cavity pipeline of the first oil cylinder 103.

Specifically, when the valve core of the second reversing valve 107 is located at the first working position, the fifth oil port p5 is communicated with the seventh oil port p7, the sixth oil port p6 is communicated with the eighth oil port p8, and pressure oil output from the second oil outlet of the flow dividing valve 105 is injected into the rod cavity of the first oil cylinder 103 through the second reversing valve 107, so that the first oil cylinder 103 is driven to retract, and the material pushing clamp arm is driven to be in an open state. When the valve core of the second reversing valve 107 is located at the second working position, the fifth oil port p5 is communicated with the eighth oil port p8, the sixth oil port p6 is communicated with the seventh oil port p7, and pressure oil output from the second oil outlet of the flow dividing valve 105 is injected into the rodless cavity of the first oil cylinder 103 through the second reversing valve 107, so that the first oil cylinder 103 is driven to extend out, and the pushing clamp arm is driven to act, so that the sawn bamboo can be pushed into the bamboo collecting notch. When the valve core of the second direction valve 107 is located at the third working position, all the oil ports are not communicated, and the first oil cylinder 103 is kept still.

With continued reference to fig. 1, the third directional valve 108 includes: a ninth port p9, a tenth port p10, an eleventh port p11, and a twelfth port p12; when the valve core of the third reversing valve 108 is located at the first working position, the ninth oil port p9 is communicated with the eleventh oil port p11, and the tenth oil port p10 is communicated with the twelfth oil port p12; when the valve core of the third reversing valve 108 is located at the second working position, the ninth oil port p9 is communicated with the twelfth oil port p12, and the tenth oil port p10 is communicated with the eleventh oil port p 11; when the valve core of the third reversing valve 108 is located at the third working position, all the oil ports are not communicated with each other; the ninth oil port p9 of the third reversing valve 108 is connected with the second oil outlet of the flow dividing valve 105 through a pipeline, the tenth oil port p10 is connected with the oil tank through a pipeline, the eleventh oil port p11 is connected with the rod cavity of the second oil cylinder 104 through a pipeline, and the twelfth oil port p12 is connected with the rodless cavity of the second oil cylinder 104 through a pipeline.

Specifically, when the valve core of the third directional valve 108 is located at the first working position, the ninth oil port p9 is communicated with the eleventh oil port p11, the tenth oil port p10 is communicated with the twelfth oil port p12, and the pressure oil output from the second oil outlet of the flow dividing valve 105 is injected into the rod cavity of the second oil cylinder 104 through the third directional valve 108, so that the second oil cylinder 104 is driven to retract, and the collecting clamp arm is driven to be in an open state. When the valve core of the third directional valve 108 is located at the second working position, the ninth oil port p9 is communicated with the twelfth oil port p12, and the tenth oil port p10 is communicated with the eleventh oil port p11, so that the second oil cylinder 104 is driven to extend out, and the collecting clamp arm is driven to a clamping state. When the valve core of the third directional valve 108 is located at the third working position, all the oil ports are not communicated, and the second oil cylinder 104 is kept still.

With continued reference to fig. 1, the second oil outlet of the flow dividing valve 105 is also connected to the oil tank through a fourth direction changing valve 112; when the fourth reversing valve 112 is in the first working position, the second oil outlet of the flow dividing valve 105 is communicated with the oil tank; when the fourth reversing valve 112 is in the second working position, the second oil outlet of the flow dividing valve 105 is not communicated with the oil tank; the second oil outlet of the flow dividing valve 105 is also connected to the oil tank through a third overflow valve 113.

Specifically, when the fourth direction valve 112 is at the first working position, the second oil outlet of the flow dividing valve 105 is communicated with the oil tank, and the oil output from the second oil outlet of the flow dividing valve 105 directly returns to the oil tank through the fourth direction valve 112. When the fourth direction valve 112 is at the second working position, the second oil outlet of the flow dividing valve 105 is not communicated with the oil tank, and the oil output from the second oil outlet of the flow dividing valve 105 can be used for driving the first oil cylinder 103 and the second oil cylinder 104. Third relief valve 113 may be used to limit the maximum pressure and prevent overloading the system.

The hydraulic system further includes: a first pressure sensor 114, a second pressure sensor 115, a rotational speed sensor 116, a first travel switch 117, a second travel switch 118; wherein, the first pressure sensor 114 is used for measuring the working pressure of the saw blade motor 102; the second pressure sensor 115 is used for measuring the working pressure of the first oil cylinder 103 and the second oil cylinder 104; a speed sensor 116 for measuring the speed of rotation of the blade motor 102; the first travel switch 117 is used for measuring whether the first oil cylinder 103 retracts to the right; the second travel switch 118 measures whether the second cylinder 104 is retracted into position.

With reference to fig. 5, the present application provides a control method of a felling bamboo machine head, applied to a hydraulic system provided in the above section, comprising the steps of automatic material collection, in particular comprising the following steps S501 to S505.

Step S501, adjusting a second reversing valve 107 to enable a first oil cylinder 103 to retract, and driving a material pushing clamping arm to be in an open state; and adjusting a third reversing valve 108 to extend the second oil cylinder 104 and drive the collecting clamp arm to a clamping state.

Step S502, the first direction valve 106 is adjusted to rotate the blade motor 102, so as to drive the circular saw to rotate and cut off the bamboo.

Step S503, adjusting the second reversing valve 107 to extend the first oil cylinder 103 so as to drive the material pushing clamp arm to push the sawn bamboo into the material collecting notch.

Step S504, adjust the third directional valve 108 to retract the second cylinder 104 to drive the gathering arm to the open state, and then adjust the third directional valve 108 again to extend the second cylinder 104 to drive the gathering arm to the gripping state.

And step S505, adjusting the second reversing valve 107 again to enable the first oil cylinder 103 to retract, and driving the material pushing clamping arm to be in an open state.

Specifically, step S501 and step S502 are initial states, the controller controls the first direction valve 106, the second direction valve 107, and the third direction valve 108 to open the material pushing clamp arm and clamp the material collecting clamp arm, and the circular saw cuts off the bamboo by rotating.

In the initial state, the first cylinder 103 is in the fully retracted state, and the second cylinder 104 is in the fully extended state. When a grabbing key of the controller is pressed down, the controller controls a valve core of the second reversing valve 107 to be adjusted to a second working position, oil enters a rodless cavity of the first oil cylinder 103, the first oil cylinder 103 extends out, and the pushing clamping arm is driven to push the sawn bamboo into the bamboo collecting notch. After pushing away the material arm clamp and compressing tightly the bamboo, the oil circuit can produce high pressure, and after second pressure sensor 115 detected high pressure signal this moment, control second switching-over valve 107's case to third operating position, first hydro-cylinder 103 keeps motionless. Then, the valve core of the third reversing valve 108 is controlled to the first working position, the second oil cylinder 104 retracts to drive the collecting clamp arm to an open state, and then the valve core of the third reversing valve 108 is controlled to the second working position, so that the second oil cylinder 104 extends to drive the collecting clamp arm to a clamping state until the second pressure sensor 115 detects a high-pressure signal, which indicates that the collecting clamp arm has collected the bamboo. After the material collection is finished, the valve core of the third reversing valve 108 is controlled to be adjusted to the third working position, and the material collection state is maintained. Finally, the controller controls the valve core of the second reversing valve 107 to adjust to the first working position, drives the first oil cylinder 103 to retract, and drives the material pushing clamping arm to be in an open state. And returning to the initial state and completing the material collecting circulation process.

With further reference to fig. 6, the control method comprises the steps of automated discharging:

in step S601, the first diverter valve 106 is adjusted to stop the blade motor 102.

Step S602, adjusting the second directional valve 107 to retract the first cylinder 103, and driving the material pushing clamp arm to an open state.

Step S603, the third directional valve 108 is adjusted to retract the second cylinder 104, so as to drive the skidder arm to an open state.

At this time, the circular saw stops rotating, the pushing arms and the collecting arms are opened, and the bamboos in the collecting notch 11 of the headstock 10 are unloaded.

With further reference to fig. 7, the process of sawing bamboo by rotating the circular saw driven by the blade motor 102 specifically includes:

step S701, when the load pressure of the saw blade motor 102 is detected to be increased, controlling the engine rotating speed of an oil source to be increased, and increasing the oil flow for driving the saw blade motor 102;

in step S702, when a decrease in the load pressure of the blade motor 102 is detected, the engine speed of the oil source is controlled to decrease, thereby decreasing the oil flow rate for driving the blade motor 102.

When cutting thick bamboo or trees, the load of saw bit motor can increase, detect the oil pressure power rising back when first pressure sensor 114, the corresponding engine speed who promotes the oil source, promote engine output, the hydraulic pump rotational speed of oil source also can increase this moment, the fluid flow of output can increase, in order to maintain the rotational speed of saw bit motor invariable relatively, the rotational speed of saw bit motor neither can be too high, also can too low, the rotational speed is too high influences the dynamic balance of equipment greatly, the too low cutting efficiency that can influence of rotational speed, can adjust the fluid flow who increases the saw bit motor, under the unchangeable condition of first overflow valve 110 limiting pressure, the cutting moment of torsion that the saw bit motor can provide becomes bigger. Therefore, when thick bamboos or trees are cut down, the rotating speed of an engine of the oil source is increased, the power is increased, the torque of the saw blade is increased, and the working efficiency and the maximum capability of sawing off the bamboos or the trees are improved.

When bamboo or trees with the diameter are felled, the load of the saw blade motor is reduced, and after the first pressure sensor 114 detects that the pressure of the saw blade motor is reduced, the rotating speed of the engine of the hydraulic oil source is correspondingly reduced, the output power of the engine is reduced, and therefore energy consumption is reduced. After the rotating speed of the engine is reduced, the rotating speed of a hydraulic pump of the oil source is also reduced, the output oil flow is reduced, the oil flow of the saw blade motor is adjusted and reduced in order to maintain the relatively constant rotating speed of the saw blade motor, and under the condition that the pressure of the first overflow valve 110 is not changed, the cutting torque provided by the circular saw motor is reduced, so that the circular saw motor is suitable for small-diameter bamboos or trees. Therefore, when the small-diameter bamboo or trees are felled, the rotating speed of the engine is reduced, the power is reduced, the rotating speed of the circular saw is unchanged, and the energy consumption is reduced under the condition that the working efficiency is unchanged.

Further, the third overflow valve 113 is used for limiting the maximum acting force of the two oil cylinders, and the bamboo is prevented from being pinched and broken.

Under emergency, when the vehicle is in emergency stop, the first reversing valve 106 is powered off and is adjusted to the second working position, the saw blade motor 102 can continue to rotate under the driving of the saw blade due to inertia of the saw blade, and at the moment, an oil inlet of the saw blade motor 102 can be replenished with oil through the check valve 109, so that the damage of elements caused by the fact that an oil way is emptied is avoided. The left oil path of the blade motor 102 provides pressure through the second relief valve 111, and the blade motor 102 is decelerated rapidly under the pressure until the rotation is stopped, and the blade motor 102 can be stopped within a few seconds.

It should be understood that the steps described above are not in the exact order of execution and that all changes that can be envisioned and do not affect the implementation of the functions are intended to be within the scope of the invention.

In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the present application as defined by the appended claims.

Claims (10)

1. A hydraulic system of a bamboo cutting machine head is characterized in that the bamboo cutting machine head comprises a machine head frame with a material collecting notch, a circular saw for cutting off bamboos, a material pushing clamping arm and a material collecting clamping arm; the material pushing clamp arms are used for pushing the cut bamboo into the material collecting notch; the collecting clamp arm is used for being matched with the machine head frame to clamp the bamboo pushed into the collecting notch by the material pushing clamp arm; the hydraulic system includes:

a hydraulic oil source (101);

a saw blade motor (102) for driving the circular saw to rotate to cut the bamboo;

the first oil cylinder (103) is used for driving the material pushing clamping arm to move;

the second oil cylinder (104) is used for driving the collecting clamping arm to move;

the flow divider valve (105) is provided with an oil inlet, a first oil outlet and a second oil outlet; the oil inlet is connected with a hydraulic oil source (101) through a pipeline;

the first reversing valve (106) is arranged between the first oil outlet of the flow dividing valve (105) and the saw blade motor (102) and is used for controlling the start and stop of the saw blade motor (102);

the second reversing valve (107) is arranged between the second oil outlet of the flow dividing valve (105) and the first oil cylinder (103) and is used for controlling the expansion and contraction of the first oil cylinder (103);

and the third reversing valve (108) is arranged between the second oil outlet of the flow dividing valve (105) and the second oil cylinder (104) and is used for controlling the extension and contraction of the second oil cylinder (104).

2. The hydraulic system of claim 1, wherein the first directional valve (106) has a first port (p 1), a second port (p 2), a third port (p 3), a fourth port (p 4); when the valve core of the first reversing valve (106) is located at the first working position, the first oil port (p 1) is communicated with the third oil port (p 3), and the second oil port (p 2) is communicated with the fourth oil port (p 4); when the valve core of the first reversing valve (106) is located at the second working position, the first oil port (p 1) is not communicated with the third oil port (p 3), the second oil port (p 2) is not communicated with the fourth oil port (p 4), and the first oil port (p 1) is communicated with the second oil port (p 2);

the first oil port (p 1) of the first reversing valve (106) is connected with a first oil outlet pipeline of the flow dividing valve (105), the second oil port (p 2) is connected with an oil tank pipeline, the third oil port (p 3) is connected with an oil inlet pipeline of the saw blade motor (102), and the fourth oil port (p 4) is connected with an oil outlet pipeline of the saw blade motor (102).

3. The hydraulic system of claim 2, wherein the oil inlet of the blade motor (102) is further connected to an oil tank through a one-way valve (109); wherein, the oil inlet of the one-way valve (109) is connected with one end of the oil tank, and the oil outlet is connected with one end of the saw blade motor (102).

4. The hydraulic system of claim 3,

the first oil outlet of the flow divider valve (105) is connected to an oil tank through a first overflow valve (110) in a pipeline manner;

the oil outlet of the saw blade motor (102) is also connected to an oil tank through a second overflow valve (111) pipeline.

5. The hydraulic system of claim 1,

the second direction changing valve (107) includes: a fifth oil port (p 5), a sixth oil port (p 6), a seventh oil port (p 7) and an eighth oil port (p 8); when the valve core of the second reversing valve (107) is located at the first working position, the fifth oil port (p 5) is communicated with the seventh oil port (p 7), and the sixth oil port (p 6) is communicated with the eighth oil port (p 8); when the valve core of the second reversing valve (107) is located at the second working position, the fifth oil port (p 5) is communicated with the eighth oil port (p 8), and the sixth oil port (p 6) is communicated with the seventh oil port (p 7); when the valve core of the second reversing valve (107) is located at a third working position, all the oil ports are not communicated with each other; the fifth oil port (p 5) of the second reversing valve (107) is connected with a second oil outlet pipeline of the flow divider valve (105), the sixth oil port (p 6) is connected with an oil tank pipeline, the seventh oil port (p 7) is connected with a rod cavity pipeline of the first oil cylinder (103), and the eighth oil port (p 8) is connected with a rodless cavity pipeline of the first oil cylinder (103);

the third directional valve (108) includes: a ninth oil port (p 9), a tenth oil port (p 10), an eleventh oil port (p 11) and a twelfth oil port (p 12); when the valve core of the third reversing valve (108) is located at the first working position, the ninth oil port (p 9) is communicated with the eleventh oil port (p 11), and the tenth oil port (p 10) is communicated with the twelfth oil port (p 12); when the valve core of the third reversing valve (108) is located at the second working position, the ninth oil port (p 9) is communicated with the twelfth oil port (p 12), and the tenth oil port (p 10) is communicated with the eleventh oil port (p 11); when the valve core of the third reversing valve (108) is located at the third working position, all the oil ports are not communicated with each other; the ninth oil port (p 9) of the third reversing valve (108) is connected with the second oil outlet pipeline of the flow dividing valve (105), the tenth oil port (p 10) is connected with the oil tank pipeline, the eleventh oil port (p 11) is connected with the rod cavity pipeline of the second oil cylinder (104), and the twelfth oil port (p 12) is connected with the rodless cavity pipeline of the second oil cylinder (104).

6. The hydraulic system according to claim 5, characterized in that the second oil outlet of the flow dividing valve (105) is further connected to a tank through a fourth directional valve (112); when the fourth reversing valve (112) is located at the first working position, the second oil outlet of the flow dividing valve (105) is communicated with the oil tank; when the fourth reversing valve (112) is located at the second working position, the second oil outlet of the flow dividing valve (105) is not communicated with the oil tank;

the second oil outlet of the flow divider valve (105) is also connected to an oil tank through a third overflow valve (113) by a pipeline.

7. The hydraulic system of claim 1, further comprising: a first pressure sensor (114), a second pressure sensor (115), a rotating speed sensor (116), a first travel switch (117) and a second travel switch (118); wherein the first pressure sensor (114) is used for measuring the working pressure of the saw blade motor (102); the second pressure sensor (115) is used for measuring the working pressure of the first oil cylinder (103) and the second oil cylinder (104); the rotating speed sensor (116) is used for measuring the rotating speed of the saw blade motor (102); the first travel switch (117) is used for measuring whether the first oil cylinder (103) retracts to the right position; a second travel switch (118) measures whether the second cylinder (104) is retracted to the position.

8. A method for controlling a bamboo cutting machine head, characterized in that it is applied to a hydraulic system according to any one of claims 1 to 7, and in that it comprises the steps of automated log collection:

adjusting a second reversing valve (107) to enable the first oil cylinder (103) to retract and drive the material pushing clamping arm to be in an open state; adjusting a third reversing valve (108) to enable a second oil cylinder (104) to extend out and drive the collecting clamping arm to a clamping state;

adjusting a first reversing valve (106) to enable a saw blade motor (102) to rotate, so that the circular saw is driven to rotate to cut off the bamboo;

adjusting a second reversing valve (107) to extend the first oil cylinder (103) to drive a material pushing clamping arm to push the sawn bamboo into the material collecting notch;

adjusting a third reversing valve (108) to retract the second oil cylinder (104) to drive the skidder clamping arms to an open state, and then adjusting the third reversing valve (108) again to extend the second oil cylinder (104) to drive the skidder clamping arms to a clamping state;

and regulating the second reversing valve (107) again to enable the first oil cylinder (103) to retract, and driving the material pushing clamping arm to be in an open state.

9. The control method according to claim 8, characterized in that it comprises a step of automated unloading:

adjusting the first reversing valve (106) to stop the rotation of the saw blade motor (102);

adjusting a second reversing valve (107) to enable the first oil cylinder (103) to retract and drive the material pushing clamping arm to be in an open state;

adjusting a third reversing valve (108) to retract the second cylinder (104) to drive the skidder arm to an open state.

10. The method of claim 8, wherein the saw blade motor (102) drives the circular saw to rotate to cut the bamboo, the method further comprising:

when the load pressure of the saw blade motor (102) is detected to be increased, the rotating speed of an engine of the oil source is controlled to be increased, so that the oil flow for driving the saw blade motor (102) is increased;

when a decrease in the load pressure of the blade motor (102) is detected, the engine speed of the control oil source is decreased, thereby reducing the oil flow rate for driving the blade motor (102).

Images