Method and system to produce required gear ratio and support holder

FIELD: mechanics.

SUBSTANCE: proposed method and system are peculiar in that motion transfer element (5) is selected with such a diametre which allows it to be located on preset first center-to-center distance from second motion transfer element (23) equal to said first center-to-center distance between first and second motion transfer elements (21, 23). Support holder (3) incorporates partially motion transfer element (5) and one intermediate element (37) arranged between flange (31) and gearbox (1).

EFFECT: simplified design to produce various gear ratios.

6 cl, 5 dwg

 

The present invention relates to a method and system for obtaining a certain ratio in motorized vehicle, as well as to the holder support in the PTO of the vehicle driven by the engine.

Vehicles equipped with auxiliary equipment of various types, for example, pumps and compressors, which often operate by using the power receiving drive power from the drive wheels of the vehicle transmission, usually through the transfer element in the gearbox of the vehicle.

This means PTO is known from patent Sweden SE 519053, it contains a gear wheel that is designed for the transmission of motion and installed in the holder supports in engagement with the front gear wheel on the intermediate shaft of the gearbox, as well as a means of connection, which provides connecting auxiliary equipment to bring it into action by using the PTO, for example by means of a hydraulic pump or a mechanical link. Front gear wheel on the intermediate shaft of the gearbox also communicates through an intermediate gear with the gear on the input shaft of the box before the h, while the transmission of motion from the gear to the gear wheel in the holder support. The holder of a support rigidly fixed to the side wall of the gearbox, while the connecting means attached to the rear of the transmission. The shaft is located in the PTO and passing between toothed wheel in the holder support and the connecting means provides transfer between movement from a mechanical drive. The shaft includes first and second parts, which can be located at different angles in relation respectively to the hub of the toothed wheel in the holder support and to the connecting node. This allows to use the holder support gears of different sizes and with different numbers of teeth to obtain different speeds of the output shaft, whereby a higher speed receive through the use of smaller gears and Vice versa.

Accessories driven via the power take-off, usually requires a certain vehicle speed PTO and, therefore, a given ratio between the PTO shaft and the input shaft of the transmission. Its final drive ratio depends on the corresponding relationship between the number of gear teeth and the gear wheel in the holder supports the, which currently results in a certain ratio by selecting gears in the holder support based on the number of teeth examined gears and gear. However, it would be desirable to create a more easy way of selecting gears in the holder support.

An additional problem associated with the above-described means of the PTO, is that the use of different sizes of the gears in the holder support to obtain different gear ratios requires holders of supports of different sizes, which, incidentally, leads to high production costs.

The first aim of the present invention is a method and system that provides easy getting a particular gear ratio in motorized vehicle between the first shaft in the gearbox and PTO.

The second objective of the present invention is the obtaining of different specific ratios when using the same holder support.

These goals are achieved by creating a method of obtaining a particular gear ratio in motorized vehicle between the first shaft of the gearbox and the shaft means of the PTO, which transfer to amarelinho movement from the first transmission element movement on the first shaft to transmit motion to the shaft means of the power take-off through the second transmission element movement, located between them, which forms part of the transmission and is mounted on the second shaft. According to the method selects an item transfer motion to the shaft means of the power take-off with such a diameter that it was located on a given first center-to-center distance from the second transmission element movement, which is essentially equal to the second center-to-center distance between the first and second transmission elements of the movement transmission element movement on the shaft by means of a PTO installed rotatably in the holder supports, attached to the side wall of the transmission, and at least one intermediate element installed between the flange of the holder support and the side wall to provide a first set pupillary distance.

The fact that the transmission element movement in the holder support is chosen on the basis of the center-to-center distance between the transmission element moves and the transmission element movement in the gearbox, allows to eliminate any dependence on the number of gear teeth and the transmission element movement in the holder support. Therefore, the method of obtaining a certain gear ratio will be easier than the method according to the prior art.

In addition, these goals have been achieved through the creation of a system for obtaining particularly what th ratio in motorized vehicle between the first shaft of the gearbox and the third shaft in the tool, PTO, where is the transmission of rotational motion from the first transmission element movement on the first shaft to transmit motion to the shaft means of the power take-off through the second transmission element movement, located between them, which forms part of the transmission and is mounted on the second shaft. The transmission element movement on the shaft means PTO has such a diameter that it is located at a given first center-to-center distance from the second transmission element movement, which is essentially equal to the second center-to-center distance between the first and second transmission elements of the movement. In addition, the transmission element movement on the shaft by means of the power take-off is mounted for rotation in the holder support that is attached to a side of the transmission. At least one intermediate element is installed between the flange of the holder support and the side wall to provide a given first center-to-center distance.

The claimed system allows to obtain the same advantages as above described method.

Also, these objectives are achieved through the creation of the holder support in the PTO of the vehicle driven by the engine, comprising a housing made with the possibility of at least partial placement of the transmission element movement which itself is arranged to mesh with the second transmission element movement in the gearbox, a flange encircling the body and is made with holes for fastening means for fastening the holder to support the gearbox, and bearing means protruding from the flange and located on opposite sides of the holder supports, with each of the tools mentioned is made with a hole passing through it to ensure rotation of the shaft on which you installed the transmission element movement. The holder support has at least one intermediate element located between the flange and the gearbox, to maintain the first center-to-center distance between the transmission element movement in the holder support and the second transmission element movement in the gearbox.

Thus, it is possible to provide the previously described center-to-center distance between the transmission element movement in the holder support and the second transmission element movement in the gearbox through the use of holders support the standard dimensions, which allows to reduce production costs.

Preferably, the intermediate element has the form of a single detail, because a smaller number of parts simplifies its installation. The intermediate element may be made annular to ensure optimal compliance with holder support.

Mainly, the intermediate element is made with holes to accommodate fastening means for securing the connection of the intermediate element relative to the holder bearings and gearbox.

The present invention will be described in more detail below with reference to the accompanying drawings, on which:

Figure 1 - schematic view of the means of power take-off attached to the side wall of the gearbox;

Figure 2 - schematic illustration of the interaction of the elements of the transfer movement in the gearbox and in the PTO;

Figure 3 is a perspective view of the holder support according to the present invention;

Figure 4 is an illustration of the attachment of the holder support 3 to the gearbox;

5 is a top view of the intermediate element according to the present invention.

Figure 1 schematically illustrates the tool 10 PTO attached to the box 1 transmission, which is part of the drive wheels transmission of a motorized vehicle, the tool 10 of the PTO to operate with a motor vehicle. The tool 10 PTO contains the first node 2 itself contains the holder 3 supports, which are attached by means of 4 fasteners, such as bolts, to the side wall of the box 1 transmission. The holder 3 supports comprises a transmission element movement in the form of a gear wheel 5 which is in engagement with the toothed wheel (not shown) in box 1 transmission. The tool 10 PTO also includes a shaft 6, which is held on the first node 2 to the second node 7 for transmitting rotational motion. The second node 7 means 10 PTO attached to the rear wall of the box 1 transmission and contains the connecting means of communication, for example, hydraulic motor 8 with the tool 10 of the power take-off for driving the auxiliary equipment of the vehicle.

Figure 2 schematically illustrates the transmission of rotational motion from the first shaft 22, which is located in box 1 of the gear to the shaft 6 of the PTO. As you can see, the first element of motion, mounted on the first shaft 22 and having the form of a first gear wheel 21, for example, a gear on the input shaft of the gearbox is engaged with the second transmission element motion, made in the form of the second gear wheel 23 on the second shaft 24, in this case, the intermediate gear on the intermediate shaft of the gearbox. The second gear 23 is engaged with the toothed wheel 5 in the holder support (figure 2 not shown), thereby ensuring the transmission of rotational motion from the input shaft 22 to the shaft 6 of the PTO. Figure 2 also shows two distances x and y, which hereinafter will be referred to as first and second center-to-center distance, with the first center-to-center distance x means the shortest distance between the geometric centers of the second gear 23 and the gear wheels is 5 in the holder supports while the second center-to-center distance means the shortest distance respectively between the geometric centers of the first and second gears 21, 23. It should be noted that although the gear 5, 21 and 23 in figure 2 are located along a straight line, in an alternative embodiment of the invention they can be located at an angle corresponding value.

Figure 3 and 4 shows the holder 3 supports according to Figure 1, showing the holder 3 supports, comprising a housing 30 which at least partially accommodates the gear wheel 5 and has an annular flange 31 passing around him. The flange 31 is made with holes 33 for introducing the above-mentioned 4 bolts used for fastening the holder 3 supports to the side wall 36 of the box 1 transmission. The flange 31 has a protruding from it and essentially perpendicular him two elongated bearing means 35 located on opposite sides of the holder supports, with each of the tools are made with the pass-through hole 38 in order to provide rotation of the shaft 6 by means of bearings 9. As shown in figure 3 and 4, between the flange 31 and the side wall 36 of the box 1 gear set ring intermediate element 37, which is hereinafter described in more detail with reference to Figure 5. The intermediate element 37 holds the holder 3 supports on the distance the AI from the side wall 36 of the box 1 transmission and therefore, increasing the center distance between the gear wheel 5 in the holder 3 supports and the second toothed wheel 23 without the necessity of changing the size of the holder 3 supports. Thus, it is possible to provide in the same or the same holder supports different gear ratios through the installation of wheels of different sizes for different pupillary distances from the second gear to thereby enable the reduction of the number of standard size holders supports and, therefore, reduce production costs.

The design of the toothed wheel 5 and its interaction with the shaft 6 and the second node 7 are described in more detail in SE 519053 and described here will not.

Figure 5 shows the annular intermediate element 37 according to the present invention, made in the form of a single part from a material with adequate strength, such as aluminum or steel. As shown in the drawing, the intermediate element 37 is made with holes 39 for the above bolts intended for fixing the intermediate element 37 between the holder 3 supports and side wall 36 of the box 1 transmission. It should be noted that these openings 39 are optional for each type of intermediate element, for example, you can not imagine the annular lower intermediate element mounted IU the remote bolts 4, connecting the holder 3 supports with box 1 transmission. It is also clear that it is possible to use more than one intermediate element 37 or not use them at all, that depends on the size of the holder 3 supports to ensure the desired first center-to-center distance x.

As mentioned above, the basis for selecting the gear 5 in the holder 3 supports to get a specific gear ratio between the first shaft 22 and the shaft 6 of the PTO is currently the ratio between the number of teeth of the first gear 21 and the gear 5 in the holder 3 supports. But found that the smaller the difference between the first and second center-to-center distances x and y (see Figure 2), the closer will be provided approach to a constant ratio regardless of the ratio between the number of teeth of gear wheels 5, 21 and 23, employed for the transmission of motion. Since the first and second center-to-center distances x and y, when they are equal, lead to a ratio of 1:1, from the above it follows that when choosing gear 5 in the holder 3 supports with the purpose of obtaining a ratio close to 1:1, essentially can not take into account the number of teeth of gear wheels 5, 21 and 23. Instead, it is preferable to choose a gear wheel 5 in the holder 3 supports so that it is dimensions led to the first center-to-center distance x relative to the second gear wheel 23 in box 1 gear, which is in a predetermined relationship with a second center-to-center distance y that approximates the desired ratio. Since when fitting holder 3 supports center-to-center distances x and y is easy to measure, the result will be provided an easy way to get a specific gear ratio.

For professionals it will be obvious that the above method of selecting gears is not limited to the above-described means of the PTO and can be applied in all cases in which use three gears to transfer rotational motion from the first shaft in the gearbox via a second shaft to the shaft means of the PTO. Thus we can assume that the gears in the holder supports interacting with any desired gear transmission. The holder support according to the present invention can be used in the same way in different types of PTO, other than those described above.

1. The method of obtaining a particular gear ratio in motorized vehicle between the first shaft of the gearbox and the shaft means of the PTO, which transfer rotational motion from the first transmission element movement on the first shaft to the transmission element movement in the Lu funds of the PTO via a second transmission element movement, located between them, which forms part of the transmission and is mounted on the second shaft, wherein the select element transmitting motion to the shaft means of the power take-off with such a diameter that it was located on a given first center-to-center distance from the second transmission element movement, which is essentially equal to the second center-to-center distance between the first and second transmission elements of the movement transmission element movement on the shaft by means of a PTO installed rotatably in the holder supports, attached to the side wall of the transmission, and at least one intermediate element installed between the flange the holder support and the side wall to provide a first set pupillary distance.

2. The system for the particular gear ratio in motorized vehicle between the first shaft of the gearbox and the third shaft in the PTO, in which the transmission of rotational motion from the first transmission element movement on the first shaft to transmit motion to the shaft means of the power take-off through the second transmission element movement, located between them, which forms part of the transmission and is mounted on the second shaft, wherein the transmission element d is to achieve on the shaft means PTO has such a diameter, he is on a given first center-to-center distance from the second transmission element movement, which is essentially equal to the second center-to-center distance between the first and second transmission elements of the movement transmission element movement on the shaft by means of the power take-off is mounted for rotation in the holder support, which is attached to the side wall of the transmission, and at least one intermediate element is installed between the flange of the holder support and the side wall to provide a given first center-to-center distance.

3. The holder support in the PTO of the vehicle driven by the engine, comprising a housing made with the possibility of at least partial placement of the transmission element movement, which itself is arranged to mesh with the second transmission element movement in the gearbox, flange, passing around the body and is made with holes for fastening means for fastening the holder to support the gearbox, and bearing means protruding from the flange and located on opposite sides of the holder supports, with each of the tools mentioned is made with a hole passing through it to ensure rotation of the shaft, the installed transmission element movement, different t is m, he has at least one intermediate element located between the flange and the gearbox, to maintain the first center-to-center distance between the transmission element movement in the holder support and the second transmission element movement in the gearbox.

4. The holder support according to claim 3, characterized in that the intermediate element has the form of a single detail.

5. The holder support according to claim 4, characterized in that the intermediate element is made annular.

6. The holder support according to any one of p 5, characterized in that the intermediate element is designed with holes to accommodate fastening means.



 

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