CN2482512Y - Power set-power takoff for vehicle - Google Patents

Abstract

A remover which is a power removal device for vehicles is provided with a lower input shaft which can remove vehicles, the gears of the lower input shaft are meshed with the gears of a intermediate shaft to drive the gears of the upper output shaft to rotate to output a first output power source; meanwhile, the end of a lower output shaft is provided with column gears to mesh with a gear circle to drive the lower output shaft to output a second power source; and a clutch and a clutch control device which controls the clutch are arranged beside the two output shafts. With a wide range of applications, the device has the advantage of small mechanical losses.

Description

Power equipment for vehicle-power takeoff

The utility model belongs to a kind of functional component that is installed on fire extinguishing tanker or the engineering truck, and it mainly acts on is that power with driving engine is delivered to the use location rationally, effectively.

Special vehicle (comprising fire extinguishing tanker, engineering truck etc.) is transformed standard vehicle by vehicle refitting factory to form by special requirement.Fire extinguishing tanker for example, it is to install fire plants such as hydraulic giant, water pump on standard vehicle additional, makes its satisfy requirement of fire extinguishing.

Because automotive engine is passed to rear-axle differential with power by change speed gear box and is driven automobile, if devices such as water pump are directly connected, will cause device such as water pump in automobile is advanced, could work, drawn design, the manufacturing work of power takeoff like this.

Power takeoff is one of main contents of power taking system, and domestic each fire extinguishing tanker power taking mode can be divided into four classes substantially at present:

One, change speed gear box loam cake power taking.This power takeoff lubricating condition is too poor, and influences the change speed gear box operation, and assembly precision is difficult to assurance, therefore can not be as developing direction from now on.Now superseded substantially.

Two, change speed gear box countershaft power taking.Because the less output that can only satisfy smaller power in space, change speed gear box countershaft place can not be satisfied the needs of fire pump.

Three, between autoclutch and change speed gear box, add the full power power taking of gear case.This is domestic at present, most popular abroad, and is lubricated convenient, but full power output, and power taking lies in the two moving function that realizes fire extinguishing tanker, transmission efficiency height.From the eighties, China's auto trade is from the automobile gearbox of external introduction tape synchronizer, this change speed gear box speed change easily, flexibly, compact conformation, be difficult for beating tooth and cause damage.But this change speed gear box can not be realized the power taking of change speed gear box loam cake.Force us to take to research, the design effort (being commonly called as the sandwich power takeoff) of the full power power takeoff that adds gear case between autoclutch and the change speed gear box from late nineteen eighties

Four, transmission shaft power taking.Because sandwich power takeoff one end is connected with power-transfer clutch, the other end is connected with change speed gear box.Require two end interfaces must be identical with former car, in addition, each power-transfer clutch, the corresponding power takeoff of change speed gear box also be unique, even vehicle is the same like this, power takeoff is also not necessarily identical.The power taking of this feelings lower drive shaft just has its original advantage.

The power takeoff of transmission shaft power taking is to be in behind the change speed gear box to the rear-axle differential transmission shaft, and original transmission shaft is blocked, and before power takeoff mediated partially, front end was connected with change speed gear box by transmission shaft.Even this power takeoff vehicle difference, if transmission when height of center conform to and can use.Structure design is basic identical with the sandwich power takeoff.

The utility model purpose is the power takeoff that a kind of every performance of design improves greatly.

Project organization of the present utility model is: a kind of power withdrawing device---power takeoff of vehicle, has the lower end input shaft that takes out vehicle power, it is characterized in that gear and the gear mesh on the tween drive shaft on the input shaft of lower end drive the main gear rotation on the output shaft of upper end and export first propulsion source, the engagement of stud wheel and gear ring is installed in the end of lower end output shaft simultaneously drives lower end output shaft rotation and export second propulsion source, and all be equipped with to its power-transfer clutch of controlling with to the on-off control mechanism of clutch control in that two output shafts are other.

On-off control mechanism adopts manually or pneumatic mode, but also can have single clutch to handle and many clutches maneuverability pattern, to satisfy user's selection.Oil pump is installed on power takeoff gives its fuel feeding lubricated.Strengthened lubricant effect like this, reduced mechanical loss, made the power takeoff temperature rise obtain stable control.

The utility model advantage is the transformation that is applicable to various vehicle, and the power takeoff cost is lower, and mechanical loss is little.

Description of drawings:

Fig. 1 is the power takeoff principle schematic of transmission shaft power taking.

Fig. 2 is a sandwich power takeoff principle schematic.

Fig. 3 is the utility model structural representation.

Embodiment: below the utility model has been paid special attention to when specific design some:

One, the noise of power takeoff

In the initial design,, have only the way that improves the accuracy of gear to solve in order to reduce noise.Through practice and research in a few years.The structure design of finding power takeoff is also very big to the influence of noise.For the equal accuracy gear, design rational in infrastructure can reduce by 5 ~ 10 decibels than original design noise.Certainly improve the precision of gear, the precision of casing so that the grade of bearing, can have substantial degradation to the noise of gear case, but cost also is multiplied, and therefore reasonably design at first is that cost is low.

Two, the temperature rise of power takeoff

The fire extinguishing tanker standard code, fire extinguishing tanker must be less than 100 ℃ in the temperature rise of four hours test under load rear power takeoffs.This is the very harsh requirement of item.The design at initial stage mainly is by the way of adding forced cooling device (cooling water pipe leads to high pressure water) in the power takeoff power takeoff temperature to be controlled at below 100 ℃ reluctantly.Through serious analysis, a large amount of experiments, the main reason that draws the power takeoff temperature rise is due to the heat that produces of lubrication by atomization.Design at this situation back reduces oil level greatly, adopts pump fuel feed lubricated, has strengthened lubricant effect, has reduced mechanical loss, makes the power takeoff temperature rise obtain stable control.

Three, maneuverability pattern

According to user's needs, the maneuverability pattern of power takeoff is designed to manually and pneumatic two kinds of forms, and also have single clutch handle and many clutches maneuverability pattern for user's selection.M/C is that the bar handle of power-transfer clutch is inserted in the operator's compartment, has pilot control to reach variable speed operation; Compressed-air control is to drive cylinder piston by the automobile source of the gas, through piston, shift fork power-transfer clutch is promoted, and reaches variable speed operation.

Four, process

The power takeoff output speed is higher, and general gear linear velocity surpasses 10m/s, and is excessive for fear of the power takeoff vibrating noise so the power takeoff accuracy of gear is selected 7-6-6 level or 6 grades for use, adopts gear-grinding process processing.Casing adopts Italian INF company resin sand device modeling, and uses the machining center essence to cut processing, and coaxial and parallel with guard box body opening axial line makes error control in allowed band.

Principle of work of the present utility model is as follows:

1, transmission shaft power taking: this form power takeoff takes out power by propeller-shaft, and needs device driven (seeing accompanying drawing 1) through the delivery port supply of power takeoff

2, sandwich power taking: this form power takeoff takes out power by autoclutch, and needs device driven (seeing accompanying drawing 2) through the delivery port supply of power takeoff.

Claims (3)

1, a kind of power withdrawing device---power takeoff of vehicle, has the lower end input shaft that takes out vehicle power, it is characterized in that gear and the gear mesh on the tween drive shaft on the input shaft of lower end drive the main gear rotation on the output shaft of upper end and export first propulsion source, the engagement of stud wheel and gear ring is installed in the end of lower end output shaft simultaneously drives lower end output shaft rotation and export second propulsion source, and all be equipped with to its power-transfer clutch of controlling with to the on-off control mechanism of clutch control in that two output shafts are other.

2, power takeoff according to claim 1 is characterized in that on-off control mechanism adopts manually or pneumatic mode.

3, power takeoff according to claim 1 is characterized in that being equipped with oil pump and gives its fuel feeding lubricated on power takeoff.

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