CN203856004U - Bulldozer driver safe seating device - Google Patents

Abstract

The utility model provides a bulldozer driver safe seating device. A seat of a cab is supported through a seat spring on a fixed bottom plate, a seating switch is arranged under the seat, the seating switch consists of a normally open contact, a normally closed contact and a movable press plate, in addition, an elastic press rod is fixedly arranged under the seat and consists of a sheath pipe, a pressure ejection rod, an ejection rod spring, the pressure ejection rod is inserted into an inner hole of the sheath pipe and realizes the downward limited position limitation, the ejection rod spring is arranged between the pressure ejection rod and the sheath pipe, the lower end of the pressure ejection rod is aligned with a position above the movable press plate. According to the characteristic that the body height of an adult driver is different from that of a child, whether the normally opened contact of the seating switch is closed or not during seating is used as detection signals, and whether a bulldozer can operate or not is controlled through an ECM (electronic control module). The occurrence of the condition that the whole bulldozer is out of control due to playing of children in the cab or other reasons can be avoided, the safety of the bulldozer or the personnel is ensured, the method is simple and convenient, the implementation is easy, the structural design is reasonable and practical, and other performance of the whole bulldozer is not influenced.

Description

Bulldozer driver safety sitting device

Technical field

The utility model relates to a kind of bulldozer driver safety sitting device, belongs to vehicle safety precautionary technology field, thereby is that a kind of safety switch by driver's seat place is connected the machine ECM control driving system of car load and the device of work system.

Background technology

At present, more and more higher to the security requirement of vehicle operating in the world, bulldozer is as a kind of Large Construction class machinery, blindly handles bulldozer very dangerous, especially for the joyful children of nature for being unfamiliar with the people of its operating process.Everyone has general idea carelessness time, adds the upper Shortcomings of safety understanding, and bulldozer drivers have and forget the experience of pulling out key and just leave car, and this just brings certain potential safety hazard.Easily occur to climb up because children are joyful and in driver's cabin, play after bulldozer or dangerous situation that other reason causes bulldozer to lose manipulation occurs.Although current bulldozer is provided with self-locking safety device, still have the possibility of blindly being opened by children.

Summary of the invention

The purpose of this utility model is to provide a kind of bulldozer driver safety sitting device, and solution children play in driver's cabin or other reason causes bulldozer problem out of control.

The purpose of this utility model realizes as follows: on fixed base plate, support the seat of driver's cabin by seat spring, and the under-seat setting switch of taking one's seat, the switch of taking one's seat is made up of constant open contact, constant close contact and movable pressing board; Separately below seat, fix elastic pressure bar, the lower end aligned of elastic pressure bar is above movable pressing board.

Elastic pressure bar is made up of protecting pipe, pressure mandril, push rod spring, and pressure mandril is inserted in protecting pipe endoporus and is spacing to limit inferior, between pressure mandril and protecting pipe, push rod spring is set.Push rod spring can be arranged on protecting pipe inner top or be enclosed within protecting pipe outside.

The switch of taking one's seat is electrically connected with ECM, ECM is electronic control module (Electronic Control Module), can control whole the operation of a machine, inside modules comprises microcontroller and imput output circuit, also comprising dynamo-electric executive system etc., is the top layer control module of power drive system, steering, parking braking system and service braking system.Constant open contact, the constant close contact of switch of taking one's seat forms a series loop together with machine ECM.After driver takes one's seat, due to the effect of pressure, the spring that connects cab seat produces compressive strain, and pressure mandril presses down the movable pressing board of the switch of taking one's seat, and constant close contact disconnects, constant open contact closure.After driver leaves, the pressure acting on seat spring disappears, seat return, and pressure mandril rises, and constant close contact is again closed, and constant open contact disconnects.When bulldozer starts, the take one's seat state of switch contact of machine ECM monitoring driver.Machine ECM is according to different job requirement programmings, if the switch of taking one's seat shows that driver does not take one's seat on the seat, machine ECM can not make bulldozer driving system or actuating device control system work.Once switch shows driver and sat on seat, machine ECM can make bulldozer driving system and actuating device control system work.Once bulldozer is in motion (turn to, travel), and the switch of taking one's seat shows driver not on the seat, unless bulldozer stops, machine ECM can not forbid bulldozer driving system or equipment system.After bulldozer stops, the machine ECM on off state of can again asking to take one's seat shows that driver takes one's seat, and just can make to travel and equipment system works.The utility model is according to body weight different screen of driver from children of growing up, using 14 following children of one full year of life as forbidding crowd, show according to Shoudu Inst. of Pediatrics's research room's survey data in 2005 of growing, China's 14 one full year of life girl children average weights are 36.38Kg, boy's body weight is 39.55Kg, therefore in the utility model using 40Kg weight as constant close contact, constant open contact conversion critical value.In the time that nobody takes a seat on the seat, the contact and the constant close contact that are positioned at movable pressing board top are kept closed; After having people to take a seat, the seat effect of being stressed moves down, the pressure mandril being connected with seat bottom also moves down thereupon, wherein the distance between pressure mandril and movable pressing board is buffer distance, this length is the safe length after body weight is sat down lower than the children of 40Kg, can not contact with movable pressing board at this weight range internal pressure push rod, this distance is set according to its coefficient of elasticity by seat spring; After the people that body weight is greater than 40Kg takes a seat, pressure mandril contacts with movable pressing board and the contact of movable pressing board bottom is contacted with constant open contact.In order to prevent that pressure mandril from damaging movable pressing board by pressure, this device continues mobile safe distance after being provided with one section of pressure mandril contact movable pressing board, solved by force compresses by push rod spring.The effect of protecting pipe is to be pressure mandril guiding, avoids it to produce deflection.

The utility model can avoid vehicle operators during leaving driver's seat, because the out of control situation of car load that children play in driver's cabin or other reason causes occurs, has ensured vehicle and personnel's safety.This device is changed little to former mechanism, method is simple and convenient, easily implements, and reasonable in design practicality, does not affect other performance of car load.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Detailed description of the invention

With reference to Fig. 1, on fixed base plate 1, support the seat 6 in driver's cabin by seat spring 9, seat 6 belows arrange the switch of taking one's seat, and the switch of taking one's seat is made up of constant open contact 2, constant close contact 4 and movable pressing board 3; Separately fixing elastic pressure bar below seat 6, elastic pressure bar is made up of protecting pipe 8, pressure mandril 5, push rod spring 7, pressure mandril 5 is inserted in protecting pipe 8 endoporus and is spacing to limit inferior, between pressure mandril 5 and protecting pipe 8, push rod spring 7 is set, the lower end aligned of pressure mandril 5 is above movable pressing board 3.According to adult driver's feature different from children's body weight, the distance between the design coefficient of elasticity of seat spring 9 and pressure mandril 5, movable pressing board 3, when adult takes one's seat, pressure mandril 5 make to take one's seat constant open contact 2 closures of switch; When children take one's seat, the constant open contact 2 of the switch of taking one's seat can not be closed, and with the operation of controlling vehicle whether switching signal flows to ECM.

Claims (2)

1. a bulldozer driver safety sitting device, on fixed base plate, support the seat of driver's cabin by seat spring, it is characterized in that: seat (6) below arranges the switch of taking one's seat, the switch of taking one's seat is made up of constant open contact (2), constant close contact (4) and movable pressing board (3); Separately below seat (6), fix elastic pressure bar, the lower end aligned of elastic pressure bar is in the top of movable pressing board (3).

2. bulldozer driver safety sitting device according to claim 1, it is characterized in that: elastic pressure bar is made up of protecting pipe (8), pressure mandril (5), push rod spring (7), pressure mandril (5) is inserted in protecting pipe (8) endoporus and is spacing to limit inferior, between pressure mandril (5) and protecting pipe (8), push rod spring (7) is set.