CN219690629U - Control system for hand and foot double-control accessory and excavator - Google Patents

Abstract

The utility model relates to a hydraulic control system, which aims to solve the problem that the operation modes of the existing excavator accessory control system and assembled accessories are possibly not adapted. The excavator can be controlled by the handle operation or by the foot operation, so that a proper operation mode can be selected according to the operation convenience of the accessory, and the operation comfort level is improved.

Description

Control system for hand and foot double-control accessory and excavator

Technical Field

The utility model relates to a hydraulic control system, in particular to a hand and foot double-control accessory control system and an excavator.

Background

On an excavator, the operation control of the hydraulic actuator is generally a handle control and a foot control. Due to the flexibility of manual operation, frequently reversing operation actions such as operation actions of a working device and turning operation of an upper body on an excavator are generally realized by a handle operation control, while some simple action operations such as a walking action are controlled by a foot pedal. The pedal control is usually that a pedal directly pushes a valve rod of a foot pilot valve to move to output pilot pressure oil, so that control of a corresponding main control valve is realized. On an electrified control excavator, the handle control generally adopts an electric control handle, the electric control handle is connected with a controller, the controller is connected with an electric proportional valve, the controller outputs corresponding control current to the electric proportional valve according to an electric signal of the electric control handle, and the electric proportional valve outputs corresponding pilot pressure oil to control a corresponding main control valve, so that corresponding operation actions are realized.

The attachment of an excavator is typically a bucket, but some other attachment may be selected for work needs. The operation of part of the accessories is simpler, such as a breaking hammer, the operation of the breaking hammer adopts pedal control, and the operation of part of the accessories is more suitable for handle control to perform more refined operation, such as a clamp and the like. The existing accessory control system equipped on the excavator often adopts one of pedal control and handle control, and optional components on the excavator during the accessory, if the accessory control system configured on the excavator is not matched with the assembled accessory operation mode, the working efficiency may be reduced, or the operation is uncomfortable, and the operation experience is poor.

Disclosure of Invention

The utility model aims to solve the technical problem that the operation modes of the existing excavator accessory control system and the assembled accessory are possibly not matched, and provides a hand and foot double-control accessory control system and an excavator, so that the excavator can select the operation mode matched with the accessory operation control between handle control and pedal control.

The technical scheme for achieving the purpose of the utility model is as follows: the manual and manual double-control accessory control system is characterized by further comprising an electric control handle, an electric proportional valve, a controller for receiving an electric control handle signal and outputting control current to the electric proportional valve, and a switching slide valve, wherein two pilot control oil ports of the foot pilot valve and the electric proportional valve and two pilot control ends of the accessory control main valve are respectively connected with the switching slide valve through pipelines, and the switching slide valve enables one of the pilot control oil ports of the foot pilot valve and the pilot control oil ports of the electric proportional valve to be communicated with the two pilot control ends of the accessory control main valve through switching the working positions of the switching slide valve.

In the utility model, the switching of the working positions of the slide valve can be switched to lead the guide oil way between the two guide control ends of the main valve of the accessory control and the guide control oil port of the foot pilot valve to be conducted, or lead the guide oil way between the two guide control ends of the main valve of the accessory control and the guide control oil port of the electric proportional valve to be conducted, so that the operator can select the pedal control or the handle control according to the operation convenience of the accessory.

In the hand and foot dual control accessory control system, the switching slide valve is a two-position six-way valve or consists of a two-position three-way valve.

In the hand and foot double control accessory control system, the switching slide valve can also be a two-position eight-way valve or consists of a two-way two-position four-way valve, and the control system also comprises a second combined control main valve, wherein the pilot hydraulic control end of the second combined control main valve is connected with the switching slide valve; the switching slide valve enables the pilot control oil port of the foot pilot valve and the pilot control oil port of the electric proportional valve to be correspondingly communicated with the two pilot control ends of the accessory control main valve and the pilot hydraulic control end of the second linkage control main valve or correspondingly communicated with the pilot hydraulic control end of the second linkage control main valve and the two pilot control ends of the accessory control main valve by switching the working positions of the switching slide valve. In the present utility model, by changing the operating position of the switching spool valve, the pedal can be used to perform the attachment operation, or the pedal can be used to perform the operation associated with the second linkage control main valve. Similarly, the handle may be used to perform an attachment actuation operation, or the handle may be used to perform an actuation operation associated with the second, interconnected control main valve.

In the manual and foot dual-control accessory control system, the control system further comprises two oil inlet ends, corresponding to a shuttle valve communicated with two hydraulic control ends of a main accessory control valve, wherein the oil outlet end of the shuttle valve is provided with a pressure sensor connected with the controller, and the hydraulic pump is a variable pump with a displacement control input end connected with the controller. The controller can judge whether the accessory has operation action or not through the pilot pressure signal led out by the shuttle valve, and if the accessory has operation action, the controller outputs control current to the variable pump to enable the hydraulic pump to exit from the idle state

The technical scheme for achieving the purpose of the utility model is as follows: the excavator is characterized by comprising the hand and foot double-control accessory control system.

Compared with the prior art, the excavator can be controlled by the handle operation and can also be controlled by the pedal operation, so that a proper operation mode can be selected according to the operation convenience of the accessory, and the operation comfort level is improved.

Drawings

FIG. 1 is a schematic diagram of a dual hand and foot control system of the present utility model.

Part names and serial numbers in the figure:

the hydraulic pump 1, the accessory control main valve 2, the accessory hydraulic actuator 3, the controller 4, the electric control handle 5, the foot pilot valve 6, the electric proportional valve 7, the switching slide valve 8, the shuttle valve 9 and the pressure sensor 10.

Detailed Description

The following describes specific embodiments with reference to the drawings.

Embodiment one.

As shown in fig. 1, the manual and manual dual-control tool control system in an embodiment of the present utility model includes a tool control main valve 2 for controlling a tool hydraulic actuator, a hydraulic pump 1 for supplying hydraulic oil to the tool control main valve 2, a manual pilot valve 6, an electric control handle 5, an electric proportional valve 4, a controller 4 for receiving an electric signal from the electric control handle 5 and outputting a control current to the electric proportional valve 7, a switching spool 8, two pilot control ports of the manual pilot valve 6 and the electric proportional valve 7, and two pilot control ports of the tool control main valve 2 are respectively connected to the switching spool 8 through pipes, and the switching spool 8 selectively connects one of the two pilot control ports of the manual pilot valve 6 and the two pilot control ports of the electric proportional valve 7 to the two pilot control ports of the tool control main valve 2 by switching its working positions.

In this embodiment, the switching spool valve 8 is preferably a two-position eight-way valve, and the control system further includes a second linkage control main valve (not shown in the figure), where two pilot hydraulic control ends of the second linkage control main valve are connected to the number 7 and number 8 oil ports of the switching spool valve through pipelines; the two pilot control oil ports of the foot pilot valve are connected with the oil ports No. 1 and No. 2 of the switching slide valve through pipelines; the two pilot control oil ports of the electric proportional valve are connected with the oil ports No. 3 and No. 4 of the switching slide valve through pipelines; the two pilot control ends of the attachment control main valve are connected with the No. 5 and No. 6 oil ports of the switching slide valve through pipelines.

The switching slide valve 8 is a slide valve and is provided with two working positions, when the switching slide valve is in a first working position, an oil port 1 is communicated with an oil port 5, an oil port 2 is communicated with an oil port 6, an oil port 3 is communicated with an oil port 7, an oil port 4 is communicated with an oil port 8, and a pilot oil path is communicated between two pilot control oil ports of the foot pilot valve 6 and two pilot control ends of the accessory control main valve 2, so that the accessory control main valve 2 can be controlled by the foot pilot valve 6 to realize the action of the accessory; the two pilot control oil ports of the electric proportional valve 7 are communicated with the pilot oil paths between the two pilot hydraulic control ends of the second linkage control main valve, and the second linkage control main valve can be controlled by the electric control handle 5 to realize the operation action of a hydraulic executing piece connected with the second linkage control main valve.

When the switching slide valve 8 is in the second working position, the No. 1 oil port is communicated with the No. 7 oil port, the No. 2 oil port is communicated with the No. 8 oil port, the No. 3 oil port is communicated with the No. 5 oil port, the No. 4 oil port is communicated with the No. 6 oil port, and a pilot oil path is communicated between two pilot control oil ports of the foot pilot valve 6 and two pilot control ends of the second pilot control main valve, so that the foot pilot valve 6 can control the second pilot control main valve to realize the operation action of a hydraulic executing part connected with the second pilot control main valve; the two pilot control oil ports of the electric proportional valve 7 are communicated with the pilot oil path between the two pilot hydraulic control ends of the main valve 2 for controlling the accessory, and the main valve 2 for controlling the accessory can be controlled by the electric control handle 5 to realize the operation action with the accessory.

In some embodiments, the switching spool valve may also be a two-position six-way valve, i.e., the port No. 7 and port No. 8 of the switching spool valve are not connected to the pilot-operated end of the second pilot-operated main valve, or the port No. 7 and port No. 8 are not provided.

In some embodiments, the switching spool valve may also be formed by a two-in-two-position four-way valve or a two-position three-way valve combination.

In some embodiments, the control system further comprises two oil inlet ends, corresponding to a shuttle valve 9 communicated with two hydraulic control ends of the main valve 2 of the accessory, wherein the oil outlet end of the shuttle valve 9 is provided with a pressure sensor 10 connected with the controller, and the hydraulic pump 1 is a variable pump with a displacement control input end connected with the controller 4. The controller 4 can determine whether or not the accessory has an operation action by the pilot pressure signal from the shuttle valve 9, and if the operation action is present, the controller 4 outputs a control current to the hydraulic pump to cause the hydraulic pump 1 to exit the idle state.

Embodiment two.

The embodiment provides an excavator, which is provided with the hand and foot double-control accessory control system. In the excavator, for example, if the arranged accessory is a breaking hammer, the switching slide valve can be switched to the first working position, and the pedal of the foot-operated pilot valve is adopted to perform the operation of the breaking hammer. When the fixture or other accessory needing to realize accurate and complex actions is configured, the switching slide valve can be switched to the second working position, and the operation control is performed on the accessory through the electric control handle.

Claims (7)

1. The hand and foot double-control accessory control system comprises an accessory control main valve for controlling an accessory hydraulic executive component, a hydraulic pump for supplying working pressure oil to the accessory control main valve, a foot pilot valve, an electric control handle, an electric proportional valve, a controller for receiving an electric signal of the electric control handle and outputting control current to the electric proportional valve, and a switching slide valve, wherein two pilot control oil ports of the foot pilot valve and the electric proportional valve and two pilot control ends of the accessory control main valve are respectively connected with the switching slide valve through pipelines, and the switching slide valve enables one of the pilot control oil ports of the foot pilot valve and the pilot control oil ports of the electric proportional valve to be communicated with the two pilot control ends of the accessory control main valve through switching of working positions of the switching slide valve.

2. The dual hand and foot control accessory control system of claim 1, wherein the shift spool is a two-position six-way valve.

3. The hand and foot dual control accessory control system of claim 2, wherein the switching spool valve is comprised of a two-in-two three-way valve.

4. The hand and foot dual control accessory control system of claim 1, further comprising a second dual control main valve, the switching spool valve being a two-position eight-way valve, a pilot end of the second dual control main valve being connected to the switching spool valve; the switching slide valve enables the pilot control oil port of the foot pilot valve and the pilot control oil port of the electric proportional valve to be correspondingly communicated with the two pilot control ends of the accessory control main valve and the pilot hydraulic control end of the second linkage control main valve or correspondingly communicated with the pilot hydraulic control end of the second linkage control main valve and the two pilot control ends of the accessory control main valve by switching the working positions of the switching slide valve.

5. The dual control hand and foot accessory control system of claim 4, wherein the switching spool valve comprises a two-in-two-position four-way valve.

6. The hand and foot dual control accessory control system according to any one of claims 1 to 5, further comprising two oil inlet ends, corresponding to a shuttle valve communicated with two hydraulic control ends of the main accessory control valve, wherein an oil outlet end of the shuttle valve is provided with a pressure sensor connected with the controller, and the hydraulic pump is a variable pump with a displacement control input end connected with the controller.

7. An excavator characterized by having the dual control accessory control system of any one of claims 1 to 6.