CN209908215U - Door control system and working machine - Google Patents
Door control system and working machine Download PDFInfo
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- CN209908215U CN209908215U CN201920358777.3U CN201920358777U CN209908215U CN 209908215 U CN209908215 U CN 209908215U CN 201920358777 U CN201920358777 U CN 201920358777U CN 209908215 U CN209908215 U CN 209908215U
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- door
- control system
- side door
- door control
- hydraulic oil
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Abstract
The utility model relates to a door control system and operation machinery are difficult to arrange the shortcoming in the aircraft bonnet outside with debris when solving current operation machinery's radiator fan reversal clean radiator, the utility model discloses construct a door control system, include through the hinge rotate the side door of installing at the platform, hydraulic cylinder that its characterized in that passes through the solenoid valve and is connected with the pressure oil source, hydraulic cylinder's first end is through round pin axle and platform rotation installation, the second end with the side door is connected, the flexible promotion of hydraulic cylinder the side door rotates to open and shut. The utility model discloses can realize opening the side door automatically when clean to the radiator, conveniently carry out the clean operation of radiator.
Description
Technical Field
The utility model relates to a door control system, more specifically say, relate to a door control system and operation machinery that is used for operation machinery to cover piece upper side door.
Background
The main engine of the excavator matched with different accessories is widely applied to the construction of projects such as mining, building, farmland and the like. The existing excavator generally adopts an air suction type heat dissipation system, a side door is arranged on a covering part of the excavator, a ventilation grating and a filter screen are arranged on the side door, a radiator is arranged between a heat dissipation fan and the side door, air outside the excavator enters an engine hood through the grating and the filter screen on the side door under the driving of the fan and flows through a cooler to cool coolant and hydraulic oil.
Host computers of excavators have high heat dissipation requirements, but during construction in farmlands and forests, catkins and leaf fragments floating in the air are blocked in the cooler along with the air flowing through the cooler by fins of the cooler, so that the cooler is not ventilated smoothly, and further the heat dissipation capacity of the whole excavator is reduced. When the radiator is blocked, the rotating direction of the fan can be changed, the direction of the airflow flowing through the radiator is changed, and then sundries sucked into the radiator are blown out of the radiator.
The side door on the outer side of the radiator is provided with a filter screen for filtering sundries, and when air flows into the whole machine, the filter screen and the side door can effectively prevent impurities outside the whole machine from entering the hood. However, similarly, when the air flows out of the whole machine in the reverse direction, the impurities blown out of the radiator by the airflow are blocked by the side door and the filter screen, and are difficult to be effectively discharged to the outside of the hood. Meanwhile, the filter screen on the side door can increase the wind resistance, reduce the wind speed of the fan during back blowing and further reduce the cleaning effect.
The above problems are also present in other working machines such as agricultural machines and the like which are constructed in farmlands and forests.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that sundries are difficult to be discharged to the outer side of a hood when a cooling fan of the prior operation machine reversely rotates to clean a radiator, and provides a door control system of an upper side door of a covering part on the operation machine and the operation machine.
The utility model discloses a realize that the technical scheme of its purpose is like: a door control system is constructed, and comprises a side door rotatably mounted on a platform through a hinge, and is characterized by further comprising a hydraulic oil cylinder connected with a pressure oil source through an electromagnetic valve, wherein the first end of the hydraulic oil cylinder is rotatably mounted on the platform through a pin shaft, the second end of the hydraulic oil cylinder is connected with the side door, and the hydraulic oil cylinder stretches and pushes the side door to rotate to open and close. The utility model discloses in, the platform is the fixed part of a relative side door, can be the frame or fix the skeleton etc. at the aircraft bonnet.
Furthermore, the door control system further comprises a rocker and a connecting rod, wherein the first end of the rocker is rotatably connected with the platform, the second end of the rocker is hinged with the second end of the hydraulic oil cylinder and the first end of the connecting rod, and the second end of the connecting rod is rotatably connected with the side door.
Furthermore, in the door control system, a door lock is arranged on the inner side of the side door, and the second end of the connecting rod is connected with an unlocking pull rod of the door lock.
Further, in the door control system, a second end of the connecting rod is provided with a long groove, the side door is connected with the connecting rod through a rotating shaft sliding in the long groove, and the moving stroke of the rotating shaft in the long groove is equal to the unlocking stroke of the unlocking pull rod of the door lock.
Furthermore, the door control system further comprises a controller for controlling the electromagnetic valve, a door closing limit switch connected with the controller for limiting door closing and a door opening limit switch for limiting door opening.
Further, in the door control system, when the door opening limit switch changes from a non-trigger state to a trigger state, the controller controls the electromagnetic valve to change the direction so that the electromagnetic valve is connected with two oil ports of the hydraulic oil cylinder through a pipeline and is communicated with an oil return port of the electromagnetic valve.
Further, in the door control system, when the door closing limit switch changes from a non-trigger state to a trigger state, the controller controls the electromagnetic valve to change the direction so that the electromagnetic valve is communicated with the oil return port of the electromagnetic valve through two oil ports of the pipeline connection hydraulic oil cylinder.
Further, in the above gate control system, the solenoid valve is a four-position four-way solenoid valve.
The utility model discloses a realize that the technical scheme of its purpose is like: a working machine is constructed comprising a bonnet, characterized in that the bonnet is provided with a door control system as described above, wherein the side door is hinged to a frame or to a frame of the bonnet.
Compared with the prior art, the utility model discloses can realize opening the side door to the radiator is automatic when clean, conveniently carry out the clean operation of radiator.
Drawings
Fig. 1 is a schematic view of the door control system of the present invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 1, in the door control system hydraulic oil cylinder 2 of the embodiment, a first end of the hydraulic oil cylinder 2 is hinged on a bracket 1 of a hood, and a second end is hinged with a second end of a rocker 4 and a first end of a connecting rod 5. The first end of the rocker 4 is hinged on the bracket 1. The second end of the connecting rod 5 is provided with a long groove and is hinged on the side door through the long groove and a rotating shaft C on the side door 8. The side door 8 is hinged on the bracket 1. The bracket 1 is provided with a door closing limit switch 7 and a door opening limit switch 9, and the door closing limit switch 7 and the door opening limit switch 9 are connected with a controller 10 and send corresponding signals to the controller 10. When the door is closed, the door closing limit switch 7 is triggered. When the door is opened to the maximum opening angle, the door opening limit switch 9 is triggered. The controller 10 is connected with the control end of the electromagnetic valve 3 and controls the action of the electromagnetic valve 3, the electromagnetic valve 3 is a three-position four-way electromagnetic valve, wherein the port A is a high-pressure side and is connected with pressure oil, and the port B is a low-pressure side and is connected with an oil tank loop. A door lock 6 is arranged on the side door, and an unlocking pull rod D of the door lock 6 is connected with the second end of the connecting rod 5.
When the side door needs to be opened, the controller 10 enables the electromagnetic valve 3 to be in the position a, hydraulic oil flows into the rodless cavity of the hydraulic oil cylinder 2, and a piston rod of the hydraulic oil cylinder 2 extends out. In the process of extending a piston rod of the hydraulic oil cylinder 2, the rocker 4 is pushed to swing around a hinged point of the rocker 4 and the support 1, the connecting rod 5 is pushed to move in the swinging process of the rocker 4, a pin shaft C on a side door moves along a long groove on the second end of the connecting rod 5, and the connecting rod 5 pushes a pull rod D on a door lock 6 in the moving process, so that the door lock is in an unlocking state. After unlocking, the connecting rod 5 further moves and is blocked by the rotating shaft C on the side door, and then the side door 8 is pushed to open. When the side door 8 is opened to the maximum opening angle, the door closing limit switch 9 is triggered, after the signal is received, the controller 10 enables the electromagnetic valve 3 to be located at the b position, and when the electromagnetic valve is located at the b position, the electromagnetic valve is connected with two oil ports of the hydraulic oil cylinder through pipelines and is communicated with an oil return port of the electromagnetic valve.
When the side door needs to be closed, the controller 10 enables the electromagnetic valve 3 to be in the position c, hydraulic oil flows into the rod cavity of the hydraulic oil cylinder 3, and a piston rod of the hydraulic oil cylinder 2 retracts. In the retraction process of a piston rod of the hydraulic oil cylinder 2, the rocker 4 is pulled to swing around a hinged point of the rocker and the support 1, the connecting rod 5 is pulled to move along the long groove on the hinged point of the side door in the swinging process of the rocker 4, and the pull rod D on the door lock 6 is released in the moving process of the connecting rod 5, so that the door lock is in a free state. The connecting rod 5 moves further and is blocked by a rotating shaft C on the side door, and the side door 8 is pulled to be closed. When the door is closed, the door lock 6 automatically locks the side door. Meanwhile, after the side door is closed, the door closing limit switch 7 is triggered, the controller 10 enables the electromagnetic valve 3 to be in the position b, the oil cylinder 2 is kept in a large cavity and small cavity communicated state, and the side door is kept in a closed state by a door lock.
When the whole machine is maintained and the door needs to be opened manually, a handle outside the side door 8 is pulled to push the door lock pull rod D to swing, and unlocking is completed. Further pulling the handle outside the side door opens the door. In the process of opening the door, the electro-valve 3 is positioned at the position b, and the rod cavity and the rodless cavity of the hydraulic oil cylinder 2 are communicated with the oil tank and can be pulled by the connecting rod 5 and the rocker 4 to move freely.
The door control system in the embodiment can be used for operation machinery, such as an excavator, forestry machinery and the like, a side door, a hydraulic oil cylinder and the like are arranged on a bracket of a hood, and the side door and the hydraulic oil cylinder can be opened together with the hood or can be opened independently for machine maintenance. The side doors and hydraulic cylinders may also be hinged to the frame.
Claims (10)
1. The door control system comprises a side door rotatably installed on a platform through a hinge, and is characterized by further comprising a hydraulic oil cylinder connected with a pressure oil source through an electromagnetic valve, wherein the first end of the hydraulic oil cylinder is rotatably installed on the platform through a pin shaft, the second end of the hydraulic oil cylinder is connected with the side door, and the hydraulic oil cylinder stretches and pushes the side door to rotate to open and close.
2. The door control system of claim 1, further comprising a rocker and a linkage, wherein a first end of the rocker is pivotally connected to the platform, a second end of the rocker is simultaneously hinged to a second end of the hydraulic cylinder and to a first end of the linkage, and a second end of the linkage is pivotally connected to the side door.
3. The door control system according to claim 2, wherein a door lock is provided on an inner side of the side door, and a second end of the connecting rod is connected to an unlocking lever of the door lock.
4. The door control system according to claim 3, wherein the second end of the connecting rod is provided with a long slot, the side door is connected with the second end of the connecting rod through a rotating shaft sliding in the long slot, and the stroke of the rotating shaft moving in the long slot is equal to the stroke of the door lock unlocking pull rod.
5. The door control system according to any one of claims 1 to 4, further comprising a controller for controlling said solenoid, a door closing limit switch connected to the controller for a door closing limit and a door opening limit switch for a door opening limit.
6. The door control system according to claim 5, wherein the controller controls the electromagnetic valve to be switched to conduct the two oil ports of the hydraulic oil cylinder with the oil return port of the electromagnetic valve through a pipeline when the door opening limit switch is changed from the non-triggering state to the triggering state.
7. The door control system according to claim 5, wherein the controller controls the electromagnetic valve to be switched to conduct the two oil ports of the hydraulic oil cylinder and the oil return port of the electromagnetic valve through a pipeline when the door closing limit switch is changed from a non-triggering state to a triggering state.
8. The door control system according to claim 6 or 7, wherein the solenoid valve is a three-position, four-way solenoid valve.
9. A work machine comprising a hood, characterized in that the hood is provided with a door control system according to any one of claims 1 to 8.
10. The work machine of claim 9, wherein said side door is hinged to a frame or a hood frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920358777.3U CN209908215U (en) | 2019-03-21 | 2019-03-21 | Door control system and working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920358777.3U CN209908215U (en) | 2019-03-21 | 2019-03-21 | Door control system and working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209908215U true CN209908215U (en) | 2020-01-07 |
Family
ID=69033142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920358777.3U Active CN209908215U (en) | 2019-03-21 | 2019-03-21 | Door control system and working machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209908215U (en) |
-
2019
- 2019-03-21 CN CN201920358777.3U patent/CN209908215U/en active Active
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