Vehicle power takeoff mechanism

FIELD: transport engineering.

SUBSTANCE: invention relates to vehicles, preferably, tractors, equipped with power takeoff mechanism with independent drive. Proposed power takeoff mechanism contains drive shaft, bushing connected with drive shaft and arranged in groove of vehicle engine crankshaft, and pins installed in holes and connecting bushing with crankshaft. Novelty is that holes for pins are made in place of contact of bushing and crankshaft groove and are formed by longitudinal recesses on contact surfaces of bushing and groove. Engine flywheel is secured directly on end face of crankshaft.

EFFECT: simplified design of mechanism, improved manufacturability and reduced overall dimensions.

2 dwg

 

The invention relates to a transport machine-building, namely the mechanisms of power takeoff of the vehicle, and can be preferably used on tractors equipped with a PTO to drive mounted or towed equipment technology.

Known the PTO of the vehicle containing the drive shaft associated with the vehicle's engine and transmitting the power flow from the engine installed in the vehicle equipment [1]. The connection of the shaft of the drive motor is effected via the drive shaft gear connected to the driven element of the clutch.

A disadvantage of the known device is the complexity of its design. In addition, the operation of the device depends on the operation of the clutch and therefore it does not provide for the transfer to process equipment independent of power flow. Consequently, when turning off the clutch when shifting the power flow transmitted via the drive shaft, is interrupted, leading to the interruption of operation of technological equipment.

Closest to the claimed and accepted as the prototype is known to the PTO of a tractor containing a drive shaft associated with the drive shaft sleeve, the mouth is fixed in the groove of the crankshaft of the engine of the tractor, and the pins connecting the sleeve to the crankshaft [2]. Pins one end of a console installed in the longitudinal holes formed in the end of the crankshaft of the engine, and the other end fixed in the holes of the flange, which is made on the sleeve. The flange of one of its plane by means of bolts and pins attached to the end of the crankshaft, and the other plane of the flange with bolts and pins attached to the flywheel of the engine. The drive shaft of the known device is connected with a crankshaft of the engine and therefore enables the transfer of technological equipment independent of power flow.

The disadvantage of the PTO of the tractor is the complexity of its design due to the presence of the sleeve flange and its low manufacturability, as the sleeve requires high precision manufacturing, which is necessary for accurate installation and balancing of the flywheel of the engine. In addition, the location of the flange of the sleeve between the end of the crankshaft and the flywheel increases the overall longitudinal dimensions of the engine.

The basis of the invention the task is to create the PTO of the vehicle in which the new location of the holes for installing the pins connecting the sleeve to the crankshaft of the engine, and the new design of the sleeve, would simplify the design is of echanism and improve its manufacturability, that reduces the complexity of manufacture of the mechanism.

This object is achieved in that in the PTO of the vehicle, especially a tractor containing a drive shaft associated with the drive shaft sleeve disposed in the groove of the crankshaft of the vehicle engine, and pins mounted in holes and connecting the sleeve to the crankshaft, according to the invention the holes for the mounting pins can be made in place of the contact sleeve and grooves of the crankshaft and formed with longitudinal grooves on the contacting surfaces of the sleeve and grooves.

As a result of use of the invention provides the technical result consists in simplifying the structure of the mechanism and improve its maintainability.

Between the set of essential features of the claimed device and achievable technical result is the following causal link.

A distinctive feature of the invention is the new location of the holes with the pins, namely: they are executed in place of the contact sleeve and grooves of the crankshaft. This allows the sleeve new shape without flange, which simplifies the design of the whole mechanism, without compromising the reliability of the connection sleeve to the crankshaft. The absence of the bushing flange, t is bwusage precision manufacturing of its surfaces, improves the manufacturability of the sleeve and therefore the PTO as a whole. When the flywheel is mounted directly on the end of the crankshaft to reduce the longitudinal dimensions of the engine by the amount of the thickness of the flange. All the above indicates the existence of a causal link between the set of essential features of the invention and achievable technical result.

Figure 1 shows the connection of the drive shaft of the proposed PTO with the engine of the vehicle, and figure 2 - section a-a in figure 1.

The PTO of the vehicle, i.e. a tractor, includes a shaft 1 drive, located inside the hollow shaft 2, the clutch and the hollow drive shaft of a transmission (not shown). The drive shaft 1 through the gear and the friction clutch is connected with the output drive shafts of the pump and hydraulic actuator mounted or towed equipment with active working bodies (not shown). With the shaft 1 drive using the spline is connected to the sleeve 3 mounted in the axial cylindrical groove 4 of the crankshaft 5, at the end of which by means of bolts, and pins secured to the flywheel 6 of the motor vehicle. The sleeve 3 is connected to the crankshaft 5 of the engine with the help of pins 7, the condition is set out in the slotted holes, executed in place of the contact sleeve 3 and grooves 4 of the crankshaft. The holes for the mounting pins 7 are formed longitudinal grooves 8 and 9 on the contacting surfaces, respectively, of the sleeve 3 and grooves 4 of the crankshaft 5.

The PTO of the vehicle operates as follows.

With the engine running torque from the crankshaft 5 through pins 7 and the sleeve 3 is transmitted to the drive shaft 1, ensuring its constant rotation together with the crankshaft. At the same time from the engine is transmitted independent of the power flow to the output shaft of the PTO, turn the gear and friction clutch (not shown). Output shafts drive the implement or trailer technological equipment, which is provided independently from the gearbox both when and when off the clutch.

Thanks to the new location of the holes with the pins 7 and the new shape of the sleeve 3 is simplified its design and manufacture, which leads to simplification of the structure of the PTO as a whole and improve its processability. Due to the fact that the sleeve 3 does not prevent the consolidation of the flywheel 6 engine at the end of the crankshaft 5, reduced longitudinal dimensions of the engine. This allows to unify the transport engines what x means, with the PTO with independent drive, and vehicles of the same type that do not have such a mechanism.

Sources of information

1. USSR author's certificate No. 984900, IPC360 To 17/28, 1982, bull. No. 48.

2. The tractors. Under. edit Abelicea, Kiev, "Harvest", 1987, S, 252, 302 (prototype).

The PTO of the vehicle, especially a tractor containing a drive shaft associated with the drive shaft sleeve disposed in the groove of the crankshaft of the vehicle engine, and pins mounted in holes and connecting the sleeve to the crankshaft, characterized in that the holes for the mounting pins can be made in place of the contact sleeve and grooves of the crankshaft and formed with longitudinal grooves on the contacting surfaces of the sleeve and grooves, and the flywheel of the engine is fixed directly to the end of the crankshaft.



 

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FIELD: transport engineering.

SUBSTANCE: invention relates to vehicles, preferably, tractors, equipped with power takeoff mechanism with independent drive. Proposed power takeoff mechanism contains drive shaft, bushing connected with drive shaft and arranged in groove of vehicle engine crankshaft, and pins installed in holes and connecting bushing with crankshaft. Novelty is that holes for pins are made in place of contact of bushing and crankshaft groove and are formed by longitudinal recesses on contact surfaces of bushing and groove. Engine flywheel is secured directly on end face of crankshaft.

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