CN201400902Y

CN201400902Y - Automatic limiting device of movable arm of loader

Info

Publication number: CN201400902Y
Application number: CN2009201379170U
Authority: CN
Inventors: 沈光伟
Original assignee: Xiamen Jinhuaxia Engineering Machinery Co Ltd
Current assignee: Xiamen Jinhuaxia Engineering Machinery Co Ltd
Priority date: 2009-04-23
Filing date: 2009-04-23
Publication date: 2010-02-10
Anticipated expiration: 2019-04-23

Abstract

The utility model mainly discloses an automatic limiting device of a movable arm of a loader, comprising a power supply, a sensing switch, an electromagnetic coil, a sensing magnet and a return spring, wherein the sensing switch and the electromagnetic coil are connected at two ends of the power supply in series; and the sensing switch is arranged at one side of a front frame of the loader towardsthe movable arm. The sensing magnet is arranged at the inner side surface of the movable arm, the movable arm is lifted to the highest point, and the positions of the sensing magnet and the sensing switch are coincided; the electromagnetic coil is arranged in a pilot operating valve of the loader, and the pilot operating valve is connected with an operating handle; and the return spring is arranged in the pilot operating valve. The automatic limiting device can control the limiting of the movable arm of the loader and prolong the service life of a lifting cylinder.

Description

Swing arm automatic spacing device on the loader

Technical field

The utility model relates to the parts of loader, and is special relevant with swing arm automatic spacing device on the loader.

Background technology

In the proper operation of loader, wherein behind shovel material, swing arm be lifted, rise and be limited in a high position, scraper bowl is parallel, just can start loader then, operation such as turns to, move ahead.

When the operator lifts the arm operation, be allocated to raise-position to the control crank of swing arm, start the pilot control valve, the control delivery valve is to the elevating ram fuel feeding, and elevating ram lifts swing arm like this.

In the process of lifting, control crank need be in raise-position always, and the operator can only be responsible for by the observation mark post and judge whether swing arm peaks.When judging to peak, the operator dials control crank and is back to meta, stops hydraulic pump works, thereby makes swing arm be limited to a high position, no longer continues to rise.For swing arm is fully attained to a high place, operator often over-compressed control crank makes elevating ram overwork in last raise-position, thereby elevating ram is damaged.

Given this, the inventor conscientiously studies, and invents out a kind of loading arm automatic spacing device, and this case produces thus.

The utility model content

The purpose of this utility model is to provide swing arm automatic spacing device on a kind of loader, makes when swing arm rises to a high position, can stop by automatic spacing.

For achieving the above object, solution of the present utility model is:

Swing arm automatic spacing device comprises power supply, inductive switch, electromagnetic coil, induced magnet and returning spring on the loader; Inductive switch, electromagnetic coil are connected on both ends of power; Inductive switch is installed in the one side of loader front frame towards swing arm; Induced magnet is installed in the medial surface of swing arm, and swing arm lifts to peak, and induced magnet and inductive switch position are harmonious; Electromagnetic coil is installed in the pilot control valve of loader, and pilot control valve attended operation handle; Returning spring is installed in the pilot control valve.

After adopting such scheme, when the operator does when lifting the arm operation, operating grip is dialled put raise-position, electromagnetic coil is in "on" position always, and according to electric magnetisation principle, electromagnetic coil produces magnetic field on every side, and operating grip is held, and does not need artificially to pin always.When swing arm arrival peak, induced magnet and inductive switch position are harmonious, and controlled by induced magnet, the inductive switch automatic disconnection, the electromagnetic coil outage, then operating grip is not subjected to attraction, under the effect of returning spring, automatically be drawn back into meta, swing arm no longer raises, and realizes automatic spacing.The operator no longer needs the raised position of subjective judgement swing arm like this, avoids excessively causing elevating ram impaired by putting operating grip.

Description of drawings

Fig. 1 is the structural representation of the utility model preferred embodiment;

Fig. 2 is the use schematic diagram of the utility model preferred embodiment.

The specific embodiment

As shown in Figure 1, be preferred embodiment of the present utility model.Swing arm automatic spacing device comprises power supply 1, inductive switch 2, electromagnetic coil 3, induced magnet 4 and returning spring 5 on the loader.

Electric connecting relation in the present embodiment is, inductive switch 2 and electromagnetic coil 3 series connection, and power supply 1 is both power supplies, the power supply 1 in the present embodiment adopts vehicle power.

Inductive switch 2 particular locations are installed on the loader front frame 9, towards the position of swing arm 6.

Induced magnet 4 is installed in the medial surface of swing arm 6, in order to determine required spacing height and position.In the present embodiment, swing arm 6 rotates when lifting peak, and induced magnet 4 inductive switches 2 positions are harmonious.

Electromagnetic coil 3 is installed in the pilot control valve 7 of loader, and pilot control valve 7 attended operation handles 8.

The utility model also has returning spring 5, and returning spring 5 is installed on the pilot control valve 7, and operating grip 8 is played back the meta effect.

The utility model is when work, and the operator puts raise-position to 8 groups of operating grips, referring to Fig. 2.Operating grip 8 is handled pilot control valve 7, make pilot control valve 7 control delivery valves 11 to elevating ram 10 fuel feeding, thereby swing arm 6 is done the moving action of arm.

Because electromagnetic coil 3 is subjected to power supply 1 power supply, is in "on" position, according to electric magnetisation principle always, produce magnetic field around the electromagnetic coil 3, with operating grip 8 automatic adhesives, therefore, the operator does not need to pin operating grip 8 always, carries out with regard to keeping lifting the arm action always.

When induced magnet 4 idle rods 6 motion that is contained on the swing arm 6, swing arm 6 rises to when the highest, makes induced magnet 4 just be harmonious with inductive switch 2, reaches distance of reaction.At this moment, controlled by induced magnet, inductive switch 2 automatic disconnections, electromagnetic coil 3 are outage thereupon also, and final magnetic field disappears, then operating grip 8 no longer is subjected to attraction, under the effect of returning spring 5, operating grip 8 is drawn back into meta automatically, as Fig. 1, swing arm 6 also no longer continues to raise, thereby realizes automatic spacing.

Claims

1, swing arm automatic spacing device on the loader, it is its feature: comprise power supply, inductive switch, electromagnetic coil, induced magnet and returning spring; Inductive switch, electromagnetic coil are connected on both ends of power; Inductive switch is installed in the one side of loader front frame towards swing arm; Induced magnet is installed in the medial surface of swing arm, and swing arm lifts to peak, and induced magnet and inductive switch position are harmonious; Electromagnetic coil is installed in the pilot control valve of loader, and pilot control valve attended operation handle; Returning spring is installed in the pilot control valve.