CN210068634U

CN210068634U - Novel full-hydraulic walking machinery opens step device

Info

Publication number: CN210068634U
Application number: CN201921005122.4U
Authority: CN
Inventors: 洪家栋
Original assignee: HUBEI FUYI AGRICULTURAL MACHINERY MANUFACTURING Co Ltd
Current assignee: HUBEI FUYI AGRICULTURAL MACHINERY MANUFACTURING Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-02-14
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses a novel full-hydraulic walking machinery open step device relates to large-scale mechanical walking field. The scheme is provided aiming at the problems of inconvenient operation and cost increase of a user caused by multiple controls in the prior art. The control circuit can start and turn only by matching with the accelerator pedal after the walking gear is hung. The walking machine has the advantages that the travel switch is additionally arranged under the accelerator pedal of the right foot, and the walking machine does not start when the gear of the starting intermediate relay is hung. The walking machine slowly starts only when the right foot steps on the accelerator pedal. The starting rushing-out of the walking machine is reduced, the operation comfort of a user is improved, and the rushing-out damage of the walking moving parts is reduced.

Description

Novel full-hydraulic walking machinery opens step device

Technical Field

The utility model relates to a large-scale machinery walking field especially relates to a novel full-hydraulic walking machinery open a step device.

Background

When the full-hydraulic walking machine starts walking, the flow of the pump is large, the reversing valve works in a reversing mode, and the rotating speed of the walking motor is increased from zero to the rotating speed in actual flow within a few tenths of a second. Can cause great impact on the whole vehicle, reduce the driving comfort and easily damage moving parts in the chassis of the walking machine. How to reduce the impact at the start of a walk is a big problem that plagues many technicians. One proposal is that a pilot walking control valve is arranged on the left side of a cab to control the pilot oil path pressure of a walking valve plate in a multi-path reversing valve, and the pilot output pressure is controlled by the magnitude of pedal force to control the opening size of a valve core in the walking valve plate, thereby controlling the flow passing through and enabling a hydraulic motor of the walking machine to realize different rotating speeds according to the flow magnitude. However, the solution has the disadvantage that the left foot is required for control, and the left foot and the right foot are required to work simultaneously when walking. The left foot controls the flow of the walking motor, and the right foot controls the throttle of the engine. The engine outputs different rotating speeds and controls the hydraulic flow input to the walking motor, and the multiple control causes inconvenient operation and increased cost for users.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model aims to provide a novel full-hydraulic walking machinery opens step device.

The utility model relates to a novel full hydraulic walking machinery starting device, which comprises an electromagnetic directional valve and a multi-way directional valve which are connected through a multi-way directional valve oil way, wherein a throttle valve is also connected in the multi-way directional valve oil way in series; comprises an accelerator pedal arranged in a cab; the travel control device is characterized by also comprising a travel switch which is arranged below the accelerator pedal and is linked with the accelerator pedal, and a control circuit for controlling the reversing of the walking machinery;

the control circuit comprises a position switch, a high-speed intermediate relay, a low-speed intermediate relay, a starting intermediate relay, a first intermediate relay of the electromagnetic directional valve and a second intermediate relay of the electromagnetic directional valve; the control ends of the high-speed intermediate relay and the starting intermediate relay are synchronously communicated with a first gear at the gear switch, and the control end of the low-speed intermediate relay is communicated with a second gear of the gear switch; the normally open contacts of the high-speed intermediate relay and the low-speed intermediate relay are connected in parallel and then connected in series with a travel switch, and after the normally open contacts of the high-speed intermediate relay and the low-speed intermediate relay are connected in series, the normally open contacts of the high-speed intermediate relay and the low-speed intermediate relay are connected with a first intermediate relay control end of the electromagnetic directional valve through the normally open contacts of the starting intermediate relay and are connected with a second intermediate relay control end of;

the normally open contact of the first intermediate relay of the electromagnetic directional valve is connected with the first working end of the electromagnetic directional valve in series; and a normally open contact of a second intermediate relay of the electromagnetic directional valve is connected with a second working end of the electromagnetic directional valve in series.

The gear switch is a double-pole double-switch, the control end of the high-speed intermediate relay is connected with a first contact of the first switch blade, the control end of the low-speed intermediate relay is connected with a second contact of the first switch blade, the control end of the starting intermediate relay is connected with a first contact of the second switch blade, and the second contact of the second switch blade is suspended.

A novel full-hydraulic walking machinery open device, its advantage lies in, increases travel switch under the accelerator pedal of right foot, when hanging the fender position that opens step auxiliary relay, walking machinery does not open step. The walking machine slowly starts only when the right foot steps on the accelerator pedal. The starting rushing-out of the walking machine is reduced, the operation comfort of a user is improved, and the rushing-out damage of the walking moving parts is reduced.

Drawings

Fig. 1 is a schematic diagram of an oil path structure of a starting device of the novel full hydraulic walking machine of the invention;

fig. 2 is a schematic circuit structure diagram of the starting device of the novel full hydraulic walking machine of the present invention.

Reference numerals: 11-electromagnetic directional valve, 12-multiple directional valve; 21-an oil path of an electromagnetic directional valve, 22-an oil path of a multi-path directional valve and 23-a throttle valve; k1-travel switch, K2-gear switch and Z1-high-speed intermediate relay; Z2-Low speed intermediate Relay; z3-starting intermediate relay; z4-electromagnetic directional valve first intermediate relay; z5-second intermediate relay of electromagnetic change valve.

Detailed Description

As shown in fig. 1 and 2, the starting device of the novel full hydraulic walking machine of the present invention comprises an electromagnetic directional valve 11 and a multi-directional valve 12 connected to a valve oil path 22 through multiple paths, and a throttle valve 23 is further connected in series to the valve oil path 22 through multiple paths. Comprises an accelerator pedal arranged in a cab. The walking mechanism is characterized by further comprising a travel switch K1 which is arranged below the accelerator pedal and is linked with the accelerator pedal, and a control circuit for controlling the reversing of the walking mechanism.

The control circuit comprises a gear switch K2, a high-speed intermediate relay Z1, a low-speed intermediate relay Z2, a starting intermediate relay Z3, a first intermediate relay Z4 of the electromagnetic directional valve and a second intermediate relay Z5 of the electromagnetic directional valve. The control ends of the high-speed intermediate relay Z1 and the starting intermediate relay Z3 are synchronously communicated with a first gear at a gear switch K2, and the control end of the low-speed intermediate relay Z2 is communicated with a second gear of the gear switch K2. The normally open contacts of the high-speed intermediate relay Z1 and the low-speed intermediate relay Z2 are connected in parallel and then connected in series with a travel switch K1, and after being connected in series, the normally open contacts of the high-speed intermediate relay Z3 are connected with the control end of a first intermediate relay Z4 of the electromagnetic directional valve, and the normally closed contacts of the high-speed intermediate relay Z3 are connected with the control end of a second intermediate relay Z5 of the electromagnetic directional valve.

The normally open contact of the first intermediate relay Z4 of the electromagnetic directional valve is connected in series with the first working end of the electromagnetic directional valve 11. And a normally open contact of a second intermediate relay Z5 of the electromagnetic directional valve is connected in series with a second working end of the electromagnetic directional valve 11.

The gear switch K2 is a double-pole double-brake switch, the control end of a high-speed intermediate relay Z1 is connected with a first contact of a first knife switch, the control end of a low-speed intermediate relay Z2 is connected with a second contact of the first knife switch, the control end of a start-step intermediate relay Z3 is connected with the first contact of a second knife switch, and the second contact of the second knife switch is suspended.

The working principle is that when the knife switch of the gear switch K2 is communicated with the second contact, the low-speed intermediate relay Z2 is electrified. The control circuit can be switched into a low-power working environment only by pressing the travel switch K1. The control circuit is used for sequentially conducting the low-speed intermediate relay Z2, the travel switch K1, the normally closed contact of the starting intermediate relay Z3 and the second intermediate relay Z5 of the electromagnetic directional valve. The traveling machine operates under the second operating end of the electromagnetic directional valve 11. When a knife switch of the gear switch K2 is communicated with a first contact, the low-speed intermediate relay Z2 is powered off, and the high-speed intermediate relay Z1 and the starting intermediate relay Z3 are powered on. The control circuit can be switched into a high-power working environment only by pressing the travel switch K1. The control circuit sequentially conducts the high-speed intermediate relay Z1, the travel switch K1, the normally open contact of the starting intermediate relay Z3 and the first intermediate relay Z4 of the electromagnetic directional valve. The traveling machine operates under the first operating end of the electromagnetic directional valve 11. The first working end of the electromagnetic directional valve 11 is used for controlling the electromagnetic directional valve 11 to change direction.

Open device, increase travel switch under the accelerator pedal of right foot, after hanging the auxiliary relay Z3 that opens step and keep off the position, also touched travel switch when accelerator pedal was stepped on down to the right foot. The travel switch is energized, the first intermediate relay Z4 of the electromagnetic directional valve controlled by the travel switch is also energized, and the electromagnetic directional valve 11 performs the directional operation. The hydraulic oil passes through the electromagnetic directional valve 11, then enters the small throttling hole of the throttling valve 23, and finally enters the pilot oil path of the traveling valve of the multi-path directional control valve 12. The traveling valve plate is delayed to change direction, and the hydraulic motor is slowly started and rotated.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims

1. A novel full-hydraulic walking mechanical starting device comprises an electromagnetic directional valve (11) and a multi-way directional valve (12) which are connected through a multi-way directional valve oil way (22), wherein a throttle valve (23) is also connected in the multi-way directional valve oil way (22) in series; comprises an accelerator pedal arranged in a cab; the device is characterized by also comprising a travel switch (K1) which is arranged below the accelerator pedal and is linked with the accelerator pedal, and a control circuit for controlling the reversing of the walking machinery;

the control circuit comprises a gear switch (K2), a high-speed intermediate relay (Z1), a low-speed intermediate relay (Z2), a start-step intermediate relay (Z3), a first electromagnetic directional valve intermediate relay (Z4) and a second electromagnetic directional valve intermediate relay (Z5); the control ends of the high-speed intermediate relay (Z1) and the start-step intermediate relay (Z3) are synchronously communicated with a first gear at a gear switch (K2), and the control end of the low-speed intermediate relay (Z2) is communicated with a second gear of the gear switch (K2); the normally open contacts of the high-speed intermediate relay (Z1) and the low-speed intermediate relay (Z2) are connected in parallel and then connected in series with a travel switch (K1), and after being connected in series, the normally open contact of the starting intermediate relay (Z3) is connected with the control end of a first intermediate relay (Z4) of the electromagnetic directional valve, and the normally closed contact of the starting intermediate relay (Z3) is connected with the control end of a second intermediate relay (Z5) of the electromagnetic directional valve;

the normally open contact of the first intermediate relay (Z4) of the electromagnetic directional valve is connected in series with the first working end of the electromagnetic directional valve (11); the normally open contact of the second intermediate relay (Z5) of the electromagnetic directional valve is connected in series with the second working end of the electromagnetic directional valve (11).

2. The starting device of the novel full hydraulic walking machine as claimed in claim 1, wherein the gear switch (K2) is a double-pole double-brake switch, the control end of the high-speed intermediate relay (Z1) is connected to the first contact of the first blade, the control end of the low-speed intermediate relay (Z2) is connected to the second contact of the first blade, the control end of the starting intermediate relay (Z3) is connected to the first contact of the second blade, and the second contact of the second blade is suspended.