HU206474B - Motor operated driving unit particularly for agricultural small tractors and agricultural processing machines e.g. lawn mowers - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to a motor drive unit, in particular for small agricultural tractors and agricultural machine tools, such as lawnmowers, in which the drive unit (2) in drive unit is driven (5) CQ EN 206 474 Scope of the description: 4 pages (including Figure 1)

Description

BACKGROUND OF THE INVENTION The present invention relates to a motor drive unit, particularly for small agricultural tractors and agricultural machinery such as lawn mowers, which is driven by a gear motor driven by two freewheeled wheels which are rotatable and have different rotation directions and speeds. in operating relationship, while the wheels are configured to provide complete rotation about an axis perpendicular to the bearing housing bearing housing. 20

As is well known, smaller farms are increasingly in need of power tractors and machine tools. However, on the one hand, these machines must be simple, inexpensive and therefore easily accessible to large masses, and on the other hand, each machine must be capable of performing several operations, otherwise the space used for storing the machines is disproportionately large and remote. significantly increases idle time due to delivery. 30

Small agricultural machines suitable for multi-purpose towing and machining are already known in the art. For example, a multipurpose agricultural tractor is known which has a freewheel driven bicycle which can be rotated by means of a sprocket, so that no reverse gear is required and the shaft of the worm wheel is equipped with a shaft end suitable for driving small agricultural machines. Such a small tractor is described, for example, in Hungarian Patent Application No. HU 196725. In this solution, the drive housing and gearbox housing are rotatable together with the front drive bike and the steering bars are secured to the engine housing, so that the operator must disengage from the chassis and reverse while walking. steer.

It is an object of the present invention to provide a small agricultural machine which, while retaining the advantages of said solution, overcomes its drawbacks.

The invention is based on the discovery that by securing the motor 50 and the gearbox to the frame while simultaneously making the worm shaft housing rotatable relative to the frame, it is possible to separate the steering shaft from the drive bicycle shaft and to separate the machining machine it is possible to rotate the steering wheel to any degree, without landing on the seat, with a bicycle consisting of freewheeled wheels fitted with a ratchet, about an axis perpendicular to the axis of the bicycle at an equidistant distance from the wheels. 60

The essence of the invention is that the gear housing is pivotally mounted on the frame by means of a pivotable steering wheel relative to the frame, while the drive motor and transmission gearbox are fixed to the frame.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention is illustrated in more detail with reference to the embodiments shown in the figure, and Figure 1 illustrates a kinematic diagram of an embodiment of the motor drive unit of the invention.

The shaft (3) of the drive motor (2) fixed in the frame (1) of the motor drive assembly according to Fig. 1 is connected to a drive shaft (6) via a transmission such as a continuous gear (4) and a transmission (5) coupled to the clutch (7) in a gear housing (8) for rotation or separation via a releasable clutch (8) in a gear housing (8), preferably a worm gear housing. The shaft (9) of the gear housing (8) consists of two wheels (10) which are freely rotatable and have different rotations and speeds relative to each other, having wheels (10) mounted in the gear housing (8). ) are designed to rotate about an axis (9) perpendicular to their connecting axis together with the gear housing (8).

The gear housing (8) engages with the steering (13) via another gear (12) and thus the gear housing (8) can be completely rotated by turning the handle (13).

The frame (l) or chassis (14), which can be rigidly connected to the frame (1), is connected to another bicycle consisting of free-wheel wheels (15). Above the wheels (15), the seat (16), which is rigidly connected to the frame (1) or to the chassis (14), is arranged such that the distance between the seat (16) and the steering wheel (13) is is defined in an enabling manner. At the end of the frame (1) traction equipment may be fitted.

In the example, the machining unit of the motor drive unit is equipped with a lawn mower. The drive of the lawnmower is structured as follows:

The shaft (3) of the drive motor (2) is through a third gear (17) with the shaft (18) of the steering wheel (13). In the second gear housing (19) disposed on the shaft (18), the other releasable coupling (20) is operable to engage the gear (17) in rotation with a fourth gear (21). The fourth gear (21) is adapted to drive a further driven shaft (22) parallel to the axis (18) of the steering wheel (13), which is provided at the lower end (23) of the driven shaft (22).

HU machine, in our example we have a lawnmower.

The motor drive unit according to the invention can be operated as follows.

When the drive motor (2) is turned on, the two clutches (7 ^ 20) are in the unlocked state, i.e. the drive unit is idle. The two couplings (7,20) can be operated independently, so the unit can only be used for towing or for stationary machining. Of course, there may be a mode like the lawnmower where simultaneous movement of the unit and machining while moving are required. In the example shown in the figure, the moving motion of the unit is controlled by actuating the clutch (7), while it is controlled by the steering (13). When the freewheel wheels (10) are set perpendicular to the axis of the unit, the unit rotates about an axis perpendicular to the axis of the rear wheels (15). If, on the other hand, the first wheels (10) are rotated 180 ° relative to the forward direction, the unit will move rearward. Transmission (5) allows the unit to move forward and backward at the same speed, with the gearless (4) gearlessly forward and backward.

Operation of the machine is independent of the drive of the moving motion and can be actuated by means of a switch (20) on the steering wheel (13). There is also no obstacle to transferring the drive to another part of the unit with further gears, and thus to other machining with the unit, or to increasing the number of gears to two or more gears, and thus to carry out several machining operations simultaneously or sequentially.

Claims (7)

1. A motor drive unit, in particular for agricultural tractors and agricultural implements such as lawn mowers, which 474 B 2 is geared via two-wheel driven freewheel drive wheels with different ratchet and speed rotation through the transmission, while the wheels are designed to allow full rotation about an axis perpendicular to the bearing housing of the drive housing, the gear housing (8) is pivotally mounted on the frame (1) by means of a pivotable steering wheel (13), while the gear motor (2) and gearbox (4) for receiving the gear (4) for the frame (1) is fixed. Motor drive unit according to claim 1, characterized in that the transmission (5) is connected to the drive shaft (9) in the gear housing (8) via a releasable clutch (7). Motor drive unit according to claim 1 or 2, characterized in that the gear unit in the gear housing (8) is a worm gear. 4. Motor drive unit according to any one of claims 1 to 3, characterized in that the second gear housing (19), which is pivotable in relation to the steering shaft (18), has a second gear housing (19) mounted on the frame (1). 2) is in contact through third gear (17). Motor drive unit according to Claim 4, characterized in that the clutch (20) in the other gear housing (19), which is operable to be axially displaced relative to the axis (18) of the steering wheel (13), is machined through a fourth gear (21). organ (23). 6. Motor drive unit according to one of claims 1 to 3, characterized in that the rear part of the frame (1) or the chassis (14) which can be rigidly connected to the frame (1) is connected to another bicycle consisting of free-wheel wheels (15). 7. Motor drive unit according to any one of claims 1 to 3, characterized in that a rigid seat (16) which is rigidly connected to the frame (1) or to the chassis (14) is provided at the rear of the frame (1) or on a chassis (14) rigidly connected to the frame (1).