CN218088825U

CN218088825U - Gantry buffer system for forward-moving forklift

Info

Publication number: CN218088825U
Application number: CN202222580344.7U
Authority: CN
Inventors: 田永超; 刘金亮; 付百康
Original assignee: Banyitong Science & Technology Developing Co ltd
Current assignee: Banyitong Science & Technology Developing Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2022-12-20
Anticipated expiration: 2032-09-28

Abstract

The utility model discloses a portal buffer system for antedisplacement formula fork truck, including setting up oil tank and the oil pump on the automobile body, oil pump intercommunication oil tank just is connected with motor drive, oil pump oil-out intercommunication multichannel switching-over valve, multichannel switching-over valve intercommunication antedisplacement hydro-cylinder, the oil return opening intercommunication oil tank of multichannel switching-over valve and antedisplacement hydro-cylinder still includes inductive switch and solenoid valve, inductive switch sets up on the portal, and with solenoid valve electric connection. The utility model discloses a set up buffer cylinder and set up inductive switch on the portal, when the portal rises, will trigger inductive switch, and then start buffer system, have energy saving and consumption reduction effect, need not to trigger any switch and control two four-way solenoid valves, arbitrary a bit stop motion in the full stroke of portal back-and-forth movement promptly, all can reduce the portal swing, and simultaneously, buffer cylinder embeds there is the spring, obviously promotes the produced damping effect of portal.

Description

Gantry buffer system for forward-moving forklift

Technical Field

The utility model relates to a fork truck portal buffering equipment technical field specifically is a portal buffer system for antedisplacement formula fork truck.

Background

Chinese patent publication no: CN102515064B discloses an electronic antedisplacement fork truck portal antedisplacement damping system, including the oil tank, be connected with into oil pipe on the oil tank, return oil pipe, advance oil pipe, return oil pipe and be connected to the multiple control valve respectively, multiple control valve external connection has the antedisplacement hydro-cylinder, be equipped with the gear pump in advancing oil pipe, the outer transmission of gear pump is connected with the motor, be equipped with two four-way solenoid valve in the connecting tube between multiple control valve and the antedisplacement hydro-cylinder, the piston rod outside of antedisplacement hydro-cylinder is equipped with travel switch, travel switch and two four-way solenoid valve control connection, when two four-way solenoid valve circular telegrams, two interfaces of two four-way solenoid valve communicate with each other. But the following disadvantages still exist in the actual using process: the vibration absorption system can be started only when the forward oil cylinder triggers the travel switch, and the vibration absorption function can not be realized at any position of the moving travel of the portal frame, so that the vibration absorption is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portal buffer system for antedisplacement formula fork truck to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a portal buffer system for antedisplacement formula fork truck, is including setting up oil tank and the oil pump on the automobile body, oil pump intercommunication oil tank and motor drive are connected, oil pump oil-out intercommunication multiple directional control valve, multiple directional control valve intercommunication antedisplacement hydro-cylinder, the oil return opening intercommunication oil tank of multiple directional control valve and antedisplacement hydro-cylinder still includes inductive switch and solenoid valve, inductive switch sets up on the portal, and with solenoid valve electric connection for detect the portal lift, the solenoid valve respectively with multiple directional control valve, antedisplacement hydro-cylinder and buffer hydro-cylinder intercommunication, buffer hydro-cylinder have the pole chamber and be provided with the spring in the no pole chamber respectively.

Preferably, the solenoid valve is a two-position four-way solenoid valve.

Preferably, the diameter and the rod diameter of the buffer oil cylinder are the same as those of the forward oil cylinder.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up buffer cylinder and set up inductive switch on the portal, when the portal rises, will trigger inductive switch, and then start buffer system, have energy saving and consumption reduction effect, need not to trigger any switch and control two four-way solenoid valves, arbitrary a bit stop motion in the full stroke of portal back-and-forth movement promptly, all can reduce the portal swing, and simultaneously, buffer cylinder embeds there is the spring, obviously promotes the produced damping effect of portal.

Drawings

FIG. 1 is a hydraulic schematic diagram of the present invention;

fig. 2 is a schematic view of the forklift of the present invention;

FIG. 3 is a graph showing the swing of the top end of the gantry during forward stacking operation without the buffering system;

fig. 4 is a graph of the swing amplitude of the top end of the gantry during forward stacking operation of the gantry with the buffer system installed.

In the figure: the hydraulic control system comprises a vehicle body 1, an oil tank 2, an oil pump 3, a motor 4, a multi-way reversing valve 5, a forward moving oil cylinder 6, an electromagnetic valve 7, a portal frame 8, a buffer oil cylinder 9 and a spring 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution:

the utility model provides a portal buffer system for antedisplacement formula fork truck, including setting up oil tank 2 and the oil pump 3 on automobile body 1, oil pump 3 intercommunication oil tank 2 and with motor 4 transmission connection, 3 oil-outs of oil pump communicate multichannel switching-over valve 5, multichannel switching-over valve 5 is by P mouthful oil feed, T mouthful oil return, A mouthful is portal lift oil circuit, the solenoid valve case function that A1, B1 correspond can be the same with A, the solenoid valve case function that B corresponds, A1, other subsidiary hydraulic functions of fork truck are connected to the B1 hydraulic fluid port. When the electromagnet a1 and the electromagnet a2 in the multi-way reversing valve 5 are not electrified, the valve core is in an O position and is in a non-operating state, and no hydraulic oil is output and flows back from the oil ports A and B. When the electromagnet a1 is electrified, the valve core is in the Y1 position, hydraulic oil with certain pressure enters the port A from the port P at the moment, the forward moving oil cylinder 6 is further pushed, and the corresponding hydraulic oil at the port B flows back to the port T and returns to the oil tank 2. When the electromagnet a2 is electrified, the valve core is in a Y2 position, hydraulic oil with certain pressure enters the port B from the port P, the forward moving oil cylinder 6 is further pushed, and the corresponding port A hydraulic oil flows back to the port T and returns to the oil tank 2;

the multi-way reversing valve 5 is communicated with a forward moving oil cylinder 6, one end of the forward moving oil cylinder 6 is fixed to a forklift body 1, the other end of the forward moving oil cylinder 6 is fixed to the bottom of a gantry 8, oil return ports of the multi-way reversing valve 5 and the forward moving oil cylinder 6 are communicated with an oil tank 2, the multi-way reversing valve further comprises an inductive switch and an electromagnetic valve 7, the electromagnetic valve 7 is a two-position four-way electromagnetic valve, the inductive switch is arranged on the gantry 8 and is electrically connected with the electromagnetic valve 7 and used for detecting lifting of the gantry 8, the electromagnetic valve 7 is respectively communicated with the multi-way reversing valve 5, the forward moving oil cylinder 6 and a buffer oil cylinder 9, a rod cavity and a rodless cavity of the buffer oil cylinder 9 are respectively provided with a spring 10, and the buffer oil cylinder 9 and the forward moving oil cylinder 6 are identical in cylinder diameter and rod diameter;

when the gantry 8 does not extend, the induction switch controls the two-position four-way solenoid valve to be in the position a, the multi-way reversing valve 5 performs forward movement or backward movement, the oil port A of the multi-way reversing valve 5, the oil port A1 of the two-position four-way solenoid valve, the oil port A2 of the two-position four-way solenoid valve and the oil port A3 of the forward oil cylinder 6 are communicated, the oil port B of the multi-way reversing valve 5, the oil port B1 of the two-position four-way solenoid valve, the oil port B2 of the two-position four-way solenoid valve and the oil port B3 of the forward oil cylinder 6 are communicated, the cylinder rod of the forward oil cylinder 6 extends or retracts, the gantry 8 moves forward or backward accordingly, the multi-way reversing valve 5 stops moving when the gantry 8 moves forward or backward, the forward oil cylinder 6 stops moving along with the gantry 6, the bottom of the gantry 8 stops moving, the top of the gantry 8 swings forwards and the operation of the forklift is not influenced by the fact that the gantry 8 does not extend.

A rod cavity and a rodless cavity in the buffer oil cylinder 9 are respectively provided with a spring 10, when oil is fed into the oil cavity on one side, the spring 10 in the oil cavity on the other side is compressed, the spring 10 generates an energy storage effect, and when the hydraulic system stops providing pressure, the spring 10 is released by the compression spring 10 to reversely push a piston in the buffer oil cylinder 9 to move. When the portal frame 8 extends out, the induction switch controls the two-position four-way solenoid valve power-on valve core machine to be in the position B, when the multi-way reversing valve 5 performs forward movement or backward movement, the oil port A of the multi-way reversing valve 5, the oil port A1 of the two-position four-way solenoid valve, the oil port A2 of the two-position four-way solenoid valve, the oil port A4 of the two-position four-way solenoid valve, the oil port A3 of the forward moving oil cylinder 6 and the oil port A5 of the buffer oil cylinder 9 are mutually communicated, the oil port B of the multi-way reversing valve 5, the oil port B1 of the two-position four-way solenoid valve, the oil port B2 of the two-position four-way solenoid valve, the oil port B4 of the forward moving oil cylinder 6, the oil port B3 of the buffer oil cylinder 9 and the oil port B5 of the buffer oil cylinder 9 are mutually communicated, the rod of the forward moving oil cylinder 6 extends out or retracts, the portal frame 8 moves forward or backward along with the oil port, the oil inlet pressure of the buffer oil cylinder 9 is consistent with the oil inlet pressure of the forward moving oil cylinder 6, the oil return port is the same, the oil return cavity pressure is greater than that of the buffer oil cavity, and the oil return cavity spring 10 is compressed. When the gantry 8 moves forwards or backwards, the multi-way reversing valve 5 stops acting, oil ports A and B of the multi-way reversing valve 5 are disconnected, and the two-position four-way electromagnetic valve, the buffer oil cylinder 9 and the forward oil cylinder 6 form a closed system. Because the multi-way reversing valve 5 does not provide pressure any more in the system, the oil return cavity of the buffer oil cylinder 9 is released by the compression spring, the piston rod of the buffer oil cylinder 9 is pushed to move reversely, the forward oil cylinder 6 is further pushed to continue to move along the original direction, meanwhile, the oil cavity on the other side of the buffer oil cylinder 9 starts to be compressed, the reciprocating motion is carried out, and the springs 10 on the two sides are continuously compressed and released to generate a continuous damping effect on the forward oil cylinder 6. When the portal 8 moves forwards or backwards, the forward oil cylinder 6 stops moving along with the action of the multi-way reversing valve 5 when the action stops, at the moment, the bottom of the portal 8 stops moving, the top of the portal 8 swings forwards and backwards due to inertia, the swinging direction of the top of the portal 8 is the same as the extending and retracting direction of the forward oil cylinder 6, the damping effect of the buffer oil cylinder 9 on the forward oil cylinder 6 counteracts the swinging of the top of the portal 8, and the actual effects that the swinging amplitude of the top of the portal 8 is reduced and the swinging time is shortened are achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a portal buffer system for antedisplacement formula fork truck, is including setting up oil tank (2) and oil pump (3) on automobile body (1), oil pump (3) intercommunication oil tank (2) and be connected with motor (4) transmission, oil pump (3) oil-out intercommunication multichannel switching-over valve (5), multichannel switching-over valve (5) intercommunication antedisplacement hydro-cylinder (6), oil return opening intercommunication oil tank (2) of multichannel switching-over valve (5) and antedisplacement hydro-cylinder (6), its characterized in that: still include inductive switch and solenoid valve (7), inductive switch sets up on portal (8), and with solenoid valve (7) electric connection for it goes up and down to detect portal (8), solenoid valve (7) communicate with multichannel switching-over valve (5), antedisplacement hydro-cylinder (6) and cushion cylinder (9) respectively, the pole chamber and the no pole intracavity of cushion cylinder (9) are provided with spring (10) respectively.

2. The mast buffering system for reach trucks of claim 1, wherein: the electromagnetic valve (7) is a two-position four-way electromagnetic valve.

3. The mast buffering system for reach trucks of claim 2, wherein: the diameter of the buffer oil cylinder (9) is the same as that of the forward oil cylinder (6).