FR2536488A1 - TRANSMISSION WITH INTERCHANGEABLE SPROCKETS, ESPECIALLY FOR AGRICULTURAL MACHINE - Google Patents

Abstract

A. INTERCHANGEABLE SPROCKET TRANSMISSION, IN PARTICULAR FOR AGRICULTURAL MACHINE. B. ONE CAN FIX ON EACH OF THE INTERCHANGEABLE WHEELS 9, 10 FOR THEIR EXCHANGE, A CHANGING DEVICE WHICH CAN BE SCREWED ON THESE WHEELS. C. THE CHANGING DEVICE PROVIDES THE MEANS OF EXERCISING ALL THE DESIRED FORCE ON THE WHEEL WHICH IS TO BE REMOVED, EVEN IF IT IS HOT.

Description

1.- "Transmission with interchangeable gears, in particular

for an agricultural machine ".

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  The present invention relates to a transmission ratio change mechanism especially for agricultural machinery, comprising, in a casing closed by a removable cover, interchangeable gear wheels,

  mounted by plugging on two parallel shafts.

  Such a mechanism is already known by the DE-

  AS 1148 79 e By switching or exchange of

  wheels of the gear shift mechanism, it is possible to

  to modify, in a simple way, the rotation speed

  However, it has been found in practice that it is not so simple, and without other measures, to make this change of speed while the machine equipped with the boot of speed in question is in use Indeed, during the march, the wheels and gears of the change of speed heats up to the point that they can not be manipulated anymore only to

  In addition, the gears of change of

  The crankcase is surrounded by the crankcase so closely, and the gears are placed so far inside the crankcase that it is not possible in practice to

achieve in their totality.

  The object of the present invention is to provide simple means which make it possible to substantially facilitate the exchange or replacement of gear wheels in e 2.-

  gearshift mechanisms.

  For this purpose, the mechanism according to the invention

  tion is characterized in that it is possible to fix on each of the interchangeable wheels for their exchange, a device for changing these wheels. With this arrangement, gearshift gears can be exchanged or replaced

  in any service condition of the machine.

  Even wheels propped on their tree can be without

  efforts or difficulties, removed from the tree.

  Other features of the invention result from

  of the following description which relate to

  examples of embodiments, described with reference to the

annexed in which:

  Figure 1 is a sectional view and 6 leva-

  side of a transmission ratio change mechanism according to the invention,

  Figure 2 is a partial representation of

  the following II-II of Figure 1, the mechanism, the cover being removed,

  Figure 3 is a side elevational view of

  of the wheel exchange device according to the invention.

tion,

  FIG. 4 is a similar elevational view

  a variant embodiment of the wheel exchange device,

  FIG. 5 is a similar view of another

variant of the device.

  The gear mechanism 1 with the mechanism

  2 is mounted, in a manner known and not shown, on the frame of a machine

  agricultural, using a fixing bracket 3.

  In the housing 4 of the gear mechanism 1, are mounted, parallel to each other, in the direction of the

  the two shafts 5 and 6 supported in such a way as to

3.-

see turning.

  The input shaft 5 protrudes forwardly out of the housing 4, and is provided with a splined profile 7 for its connection to an articulated shaft. The input shaft 5 and the shaft 6 protrude on the side rear of the housing 4 beyond the support bearings 8, by their ends 51 and 6 'On these ends 51 and 6' are placed the interchangeable toothed wheels 9 and 10 which mesh with each other and which are immobilized against axial displacement to the 11 screws The two interchangeable gear wheels

  9 and 10 form the gearshift mechanism 2.

  They are protected against contamination by the cover 12.

  On the shaft 6 is also wedged the pinion co-

  13 which meshes with another bevel gear 14 which

  is wedged on an intermediate shaft 15 arranged perpendicularly

  the two parallel trees 5 and 6

  angularism 16 formed by the two bevel gears 13 and 14 is driven an intermediate shaft which in turn causes an intermediate mechanism composed of several

  toothed wheels superimposed and meshing with each other,

  from which the various tools can be

very appliances.

  It is also possible to entrench

  such individuals from the tree 6.

  By reversing the toothed wheels 9 and 10, as well as by their replacement by other toothed wheels giving another report, it is possible to modify, at will, the

  transmission ratio of the gear mechanism l and

  if the speed of rotation of the shaft 6.

  Interchangeable gear wheels 9 and 10

  each have holes 18 provided with a thread.

  By means of these holes 18 it is possible to connect the devices

  exchange to the wheels 9 and 10 of the gear change.

  These wheel changing devices can

4.

  to take on the most varied forms of

  The device according to FIG. 3 consists of a gou-

  This stud 20 can be screwed with

  with its thread 19, in one of the threaded holes 18 of the interchangeable wheels 9 or 10 O

  The change device according to the

  re 4, is constituted in the form of a handle 21 provided

  a threaded shaft 22 which can be screwed into one of the

  threaded holes 18 of wheels 9 or 10.

  The device according to FIG.

  This handle is welded to a piece of U-shaped bent sheet metal 24. In the c-long section 25 of this piece 24 are provided elongated bores 26 by means of screws engaged in the form of a handle. these elongated holes 26, the handle 23 can be fixed by screwing on the wheels 9 or 10, the screws engaging in

the holes 18 of the wheels.

  The exchange or replacement of

  changeable 9 and 10 is carried out as follows: After removal of the cover 12, it removes

  firstly the screws 11, the spring washer and the

  Then, first screw a wheel changing device into one or both threaded holes 18

  it becomes easy to remove the interchangeable gear

  The corresponding force of the shaft Gr Ace to this wheel change device, is even sufficient force to remove the interchangeable gear wheels which are wedged after it from the shaft. After extraction of the first wheel from the shaft, the device wheel change is unscrewed and separated from the wheel and it is screwed into one of the holes or in the two holes of the other gear which can be removed from its shaft Also, it is possible to put back in place , by inverting them, the desired toothed wheels on the shafts, so as to achieve the desired transmission ratio In the illustrated example # 5.-

  it is recommended to remove the upper wheel the first

  first and put it back in last.

  After placing the wheels, they are locked by means of the screws 11, flat washers and spring washers. Finally, the lid 12 is screwed on the opening and the work can be continued with

the machine.

Claims (5)

R E V E N D I C A T IO N S   * l.-Transmission interchangeable gears, in particular for an agricultural machine, comprising, in a housing closed by a removable cover, gear wheels   interchangeable, mounted by plugging onto two parallel shafts   interlocks, characterized in that it is possible to fix on each of the interchangeable wheels (9, 10) for their exchange, a device for changing (20, 21, 23) these wheels (9, 10).   Transmission according to Claim 1, characterized in that the interchangeable wheels (9, 10) are   each provided with at least one piercing (18).   Transmission according to one of the claims   1 and 2, characterized in that the bores (18) are made   in the form of threaded bores.   4 Transmission according to any of the   Claims 1 to 3, characterized in that the devices   change made in the form of a stud (20) provided with a thread (19) can be engaged by screwing in the threaded bores (18) of the wheels.   5 Transmission according to any one of   1 to 3, characterized in that it is possible to   in the threaded holes (18) of the exchange devices   made in the form of screwable handles (21, 23).