RU2812368C1 - Belt gearbox - Google Patents

Abstract

FIELD: belt gearboxes.

SUBSTANCE: to transmit rotation and torque, belt gearboxes use belts located on pulleys mounted on the input and output shafts. To implement reverse transmission, an intermediate shaft and wheels mounted on the intermediate and output shafts are used, which are in contact with each other with a rubber or silicone coating.

EFFECT: creating an easy-to-maintain gearbox.

6 cl, 14 dwg

Description

The invention relates to gearboxes for vehicles and mechanisms. Can be used in small vehicles with gearboxes (bicycles, scooters), low-power cars, sports vehicles (for example, go-karts, buggies), including those intended for driving by children, and can also be used as a teaching aid to explain the operation of gearboxes and taking into account gearbox ratios, or changing the speeds of mechanisms such as pumps, fans, etc.

In the following text, instead of the phrase “belt gearbox,” the phrase “belt gearbox” or “manual gearbox” may be used.

The prior art patent CN 204828630 describes a continuously variable transmission (variator), which can operate in high-speed or low-speed mode, with the modes being switched by moving the gear bushings. Considering that the gearbox uses gears, it can be assumed that such a gearbox will require at least periodic lubrication, and the presence of a metal CVT belt will reduce the ability to manually control the speed. The differences from the stated solution are that:

- Manual transmission does not have gears, and the interaction of the shafts is ensured by belts and pulleys;

- Manual transmission has clearly separated gears;

- Manual transmission may have an automatic gear shift drive, but involves predominantly manual control.

There is a well-known patent CN 204852200, which describes a gearbox in which shifting is ensured by moving the shift gear along the shaft from gear pairs with one gear ratio to others.

The differences from the stated solution are that:

- Manual transmission does not have gears, and the interaction of the shafts is ensured by belts and pulleys;

- Manual transmission has separate gear shifting due to the tension of one or another belt.

There is a known patent US 2003162620, which describes a gearbox including a variator. In this case, the gearbox has gears to provide gears with fixed gear ratios and a variator, presented in the form of a belt on two shafts, whose diameter can change during operation.

The differences from the stated solution are that:

- Manual transmission does not have gears;

- Manual transmission has clearly separated gears;

- The belts used in manual transmissions have tensioners with the help of which the gears are engaged.

There is a well-known patent CN 107630992, which describes a three-speed gearbox in which a belt is used to transmit torque from one shaft to another, while the belt is worn between two pulleys, and the shaft responsible for shifting gears is located between the pulleys inside the belt. This shaft is equipped with three elements of different diameters and switching is done by moving the shaft and these elements relative to the belt.

The differences from the stated solution are that:

- Manual transmission has clearly separated gears;

- The belts used in manual transmissions have tensioners with the help of which the gears are engaged;

- The manual transmission has a reverse gear;

Manual transmission does not require an additional pulley attached to the gearbox;

- Manual transmission does not have a mechanism for moving the shaft along the axis, which can reduce reliability due to belt slippage.

The closest solution is patent CN 110319178, which describes a gearbox in which a belt drive is used in conjunction with a gear drive. In this case, the drive shaft is connected to the middle intermediate shaft using gears (in this case, gear shifting is ensured by the movement of gears), and the intermediate shaft is connected to the output shaft using a belt.

The differences from the stated solution are that:

- Manual transmission does not have gears;

- The belts used in manual transmissions have tensioners with the help of which the gears are engaged;

- Manual transmission does not have a mechanism for moving the shaft along the axis.

As a rule, existing and introduced gearboxes are difficult to maintain, may require gear lubrication, oil filling, have a complex shaft drive mechanism, etc. Repairing such gearboxes is difficult, and such repairs cannot be carried out by children and adolescents, who, among other things, could be trained to operate equipment using simple devices. At the same time, gearboxes used in transport or technology require initial skills in operation and repair.

The proposed invention allows us to eliminate these problems, since it has practically no lubricated parts with the exception of bearings, is easy to repair, and has a clear device on the basis of which you can gain initial skills in working with equipment and repairs.

The technical result of the claimed invention consists in the development of a gearbox that does not require liquid lubrication, with the exception of the use of lubricants in the bearings, with the possibility of reverse without the use of gear pairs, the presence of at least one gear for forward movement and with simple engagement of gears.

The technical result is achieved by eliminating the use of gears and the use of pulleys of various diameters, on which belts are placed with the possibility of sagging; reverse is ensured by using rubber-coated wheels capable of transmitting torque to the output shaft in the opposite direction, and simple engagement of gears is ensured by pressing the tensioner against the belt, which ensures its tension and rotation of the pulleys and allows you to abandon the use of a clutch, since the belts can provide some slippage.

Special cases of manufacturing a structure are:

- Changing the size of the structure;

- Changing the shape of the structure or its elements, as well as their quantity;

- Replacement of bearings with bushings;

- Use of other types of tensioners.

Brief description of drawings:

Fig. 1 - Belt gearbox assembly, schematically the shift lever is connected to the gearbox with a cable;

Fig. 2 - Belt gearbox assembly, schematically the shift lever is connected to the gearbox by a hydraulic hose;

Fig. 3 - Side view of the manual transmission;

Fig. 4 - View of the manual transmission from the side of the tensioner axis;

Fig. 5 - manual transmission in section;

Fig. 6 - sectional view of manual transmission, view of reverse (reverse) gear;

Fig. 7 - Sectional view of rubber-coated reverse gear wheels;

Fig. 8 - cross-section of a manual transmission, side view, demonstrating the sagging of the belt in a gear that is not engaged;

Fig. 9 - Schematic representation of the manual transmission with the designation of sections, top view;

Fig. 10 - Section A-A, diagram of torque transmission in reverse gear;

Fig. 11 - Section B-B, diagram of torque transmission in the “front” gear (depending on the type and type of equipment, it is permissible to change the direction of movement of the gears in such a way that the front gears will provide backward movement or left rotation of the shaft and vice versa);

Fig. 12 - Schematic representation of manual transmission, side view with section designation;

Fig. 13 - Section B-B, diagram of torque transmission through belts, pulleys and wheels;

Fig. 14 - Diagram of a possible hydraulic cylinder for use in the design.

The following elements are shown in the images of the belt transmission:

1. Body

2. Shaft bearing

3. Shaft (the input and output shafts are similar in structure, differing mainly in their location in the gearbox)

4. Tensioner axis

5. Housing cover

6. Tensioner

7. Belt

8. Pulley

9. Cable

10. Rope schematically

11. Gearbox lever housing (schematically)

12. Gear lever

13. Spring

14. Spring mounting protrusion

15. Hydraulic cylinder

16. Hydraulic cylinder piston

17. Bolt securing the hydraulic cylinder piston to the tensioner

18. Nut

19. Hydraulic hose

20. Hydraulic hose (schematically)

21. Spacer between pulleys

22. Reversing intermediate wheel

23. Reverse gear wheel

24. Rubber coating

25. Reversing intermediate wheel axle

26. Tensioner roller

27. Tensioner roller bearing

28. Reverse gear intermediate wheel bearing

29. Retaining ring

30. Horizontal line corresponding to a tense belt

31. Direction of rotation of pulleys and wheels

32. Correspondence of the directions of rotation of the input and output shafts

33. Direction of rotation of the output shaft when reverse gear is engaged (assuming the input shaft rotates clockwise)

34. Proposed direction of torque transmission from the engine (or other drive) to the mechanism

35. Second gear engaged diagram

36. Diagram of possible connection of first or third gear

37. Diagram of reverse gear enabled

38. O-rings

39. Hydraulic fluid

The principle diagram of the operation of a manual transmission is as follows: In a quiet state, the belts 7 are located on the pulleys 8 freely with the possibility of sagging. When it is necessary to engage any gear, the tensioner roller 26 is pressed against the belt 7, which leads to the tension of the belt 7 and its better connection to the pulleys 8, and, accordingly, to the transmission of torque from the pulley 8 of the input shaft 3 through the belt 7 to the pulley 8 output shaft 3.

The tensioners 6 can be activated using a gearbox lever 12 having a housing 11 (in this case, in Fig. 1 and 2 gearbox levers 12 with a housing 11 are shown, which is shown schematically, since it is assumed that one of the existing mechanisms can be installed inside the housing, therefore The specific structure of the gearshift lever mechanism is not important within the framework of this invention). Next, it is possible to attach cables 9 or hydraulic cylinders 15 to the gearbox lever housing 11 (and the corresponding mechanism). Both options are shown together in the images of manual transmissions, however, in the conditions of actual operation and production of manual transmissions, one of them is selected. The possibility of using cables 9 is shown in more detail in Fig. 1. In this case, when the gear is engaged by lever 12, cable 9 is pulled (the cable is shown schematically as element 10) inside the gearbox lever housing 11. In this case, the second end of cable 9, fixed to the plate of tensioner 6 on the reverse side, when tightened, forces tensioner 6 to rotate axis 4, while the tensioner lever 6 (at the end of which a bearing 27 and a roller 26 are installed) is pressed by a roller 26 to the belt 7, producing tension on the pulleys 8. The tensioner can also be equipped with a spring 13, which returns the tensioner 6 to its original position when it is not engaged, but it should be taken into account that the presence of a spring is not necessary, since when the transmission is turned off, the elastic forces of the belt 7 will lead to the repulsion of the tensioner 6 to an unused position, that is, the free position of the tensioner 6 will be ensured.

In the case of using a hydraulic system, as shown in Fig. 2, when the gear is engaged by lever 12, the piston 16 installed in the hydraulic cylinder 15 (which is installed on the body of the gearbox lever 11) moves, while the liquid 39 located inside the hydraulic cylinder 15 and limited by the walls of the hydraulic cylinder 15, piston 16 and sealing rings 38 is displaced in the direction of the hydraulic hose 19 ( The hydraulic hose is shown schematically at number 20) and pushes the response piston 16 located inside the hydraulic cylinder 15 mounted on the gearbox housing 1. The pushed piston 16, resting against the plate of the tensioner 6, causes the tensioner 6 to rotate on the axis 4, pressing the tensioner roller 26 against the belt 7, causing its tension on the pulleys 8. When the gear is turned off, the fluid 39 flows in the opposite direction to the hydraulic cylinder 15, which is installed on the gearbox lever housing 11. In this case, the pressure on the tensioner plate 6 is reduced and it is pushed back by the elastic forces of the belt 7 to its original position. It is also possible to return the tensioner 6 to its original position by rigidly connecting the tensioner strip 6 and the hydraulic piston 16 with a bolt 17. In this case, the reverse flow of liquid 39 and the removal of the piston 16 inside the hydraulic cylinder 15, which is installed on the gearbox housing 1, will automatically return the tensioner 6 to its original position .

Thus, activation of each of the tensioners 6 is possible using a cable 9, a cable 9 and a spring 13, a hydraulic piston 16, or a hydraulic piston 16 and a bolt 17.

If it is necessary to engage the reverse gear (which can be seen in more detail in the images of Figs. 6 and 7), the tensioner 6 is moved, which is responsible for the reverse gear. In this case, the roller 26 mounted on the tensioner 6 using bearings 27 is pressed against the belt 7 causing its tension on the pulley 8 and wheel 22. Wheel 22 is fixed on the axis of the intermediate shaft 25 using bearings 28, which ensure free rotation of wheel 22, and a retaining ring 29. The wheel 22 has two parts, one of which is made in the form of a pulley for interaction with the belt 7, and the other is covered with rubber 24 or silicone along the outer diameter.

The rubber (or silicone) coating 24 of the wheel 22 is in contact with the rubber (or silicone) coating 24 of the reverse gear wheel 23, which is mounted on the output shaft 3. Thus, by using the intermediate wheel 22 and its contact with the reverse gear wheel 23 using a rubber coating ensures reverse rotation of the output shaft 3. Moreover, since reverse rotation is ensured using wheels 22, 23 covered with rubber 24, and not gears, there is no need for lubrication, which makes servicing the manual transmission easier.

The transmission of torque and the direction of rotation of manual transmission elements is shown in the images of Fig. 10 and fig. 11. In the image of FIG. 10 shows the transmission of torque in a reverse gear with reverse rotation of the output shaft 3. As can be seen, when the input shaft 3 (which is located in the image on the right) rotates clockwise 31 and pulley 8, the belt 7 transmits rotation and torque to the idler pulley of the reverse gear. 22 which also rotates clockwise 31. In turn, the intermediate wheel 22 comes into contact with the reverse gear wheel 23 located on the output shaft 3 (located in the image on the left). Contact is provided by a rubber or silicone coating 24, which allows for elasticity and increased adhesion at the point of contact of the wheels, which avoids slipping under the loads found in the mode of transport described above. Thanks to this contact, reverse rotation 31 of the reverse gear wheel 23 is ensured.

In the image of FIG. 11, in turn, shows the transmission of torque and rotation in a conventional “forward” gear. As can be seen, when the input shaft 3 (located on the right in the image) and pulley 8 rotate clockwise 31, the belt 7 transmits rotation and torque to the pulley 8 of the output shaft 3 (located on the left in the image). In this case, the direction of rotation 31 does not change; the output shaft 3 and its pulley 8 also rotate clockwise.

The gear shift diagram is shown in Fig. 13. In the image, input shaft 3 is on the left and output shaft 3 is on the right. It is noticeable that the pulleys 8 have different sizes, which makes it possible to ensure a difference in the gear ratio in different gears. So, for example, the first gear corresponds to the transmission of torque and rotation from the small pulley 8 of the input shaft 3 to the large pulley 8 of the output shaft 3, the second gear corresponds to the transmission from the medium-sized pulley 8 on the input shaft 3 to the medium-sized pulley 8 of the output shaft 3, and The third gear corresponds to the transmission from the large pulley 8 on the input shaft 3 to the small pulley 8 on the output shaft 3.

Let us assume that the torque from the engine 34 is transmitted to the input shaft 3 which rotates clockwise 32 together with the pulleys 8 located on it. When the second gear is engaged (schematically solid line 35), the tensioned belt 7 transmits rotation to the pulley 8 of the output shaft 3 and rotation from the pulley it is transmitted accordingly to the output shaft 3, which also rotates clockwise 32 and transmits torque further (for example, to the wheels). Also in the image you can see a possible diagram of the inclusion of first and third gears (schematically 36 solid broken line). The reverse gear activation circuit is shown by dashed line 37. Thus, when the input shaft rotates clockwise 32, the output shaft rotates counterclockwise 33.

Moreover, to change gears, there is no need to engage the clutch, since when changing gears, the tensioner 6 of the engaged gear is released, the belt 7 is loosened, and the tensioner 6 of the next gear is pressed with tension on the corresponding belt 7. In this case, the design allows for slight slipping of the belt 7 on the pulleys 8.

Overall, the image of FIG. 13 complements the images of Fig. 10 and fig. 11 for a better understanding of torque and rotation transmission.

Features of the invention:

1. Bearings 2, 27, 28 - pre-lubricated closed type are used in order to prevent scattering of lubricant from the bearing during operation and there is no need to fill the manual transmission with liquid lubricant. Additionally, bearings may be replaced by bushings depending on the type of device or vehicle and the expected loads.

2. Since there are no gears in the manual transmission, and the transmission of rotation is carried out by belts 7 or rubber-coated wheels 22, 23, lubrication is not required. In addition, lubrication is strictly not recommended, as it can lead to slipping of the wheels 22, 23 relative to each other and the belts 7 on the pulleys 8.

3. To separate the pulleys 8 from each other and provide enough space for the location of the tensioners 6 in the manual transmission, spacers 21 are used on the shafts 3, located between the pulleys 8 and between the outer pulleys 8 and bearings 2.

4. The coating of wheels 22, 23 can be made of rubber or silicone.

5. Shafts 3 are made mainly with splines or keyed connections to rigidly fasten pulleys 8 and reverse gear wheel 23 to them.

6. When the gear is turned off, sagging of the belts 7 on the pulleys 8 is allowed, as shown in the image of Fig. 8, where it is visually noticeable that the belt 7 sags relative to the horizontal line 30, which is achieved by the belt 7 when it is tensioned using the tensioner 6.

7. As stated earlier, instead of driving the tensioners 6 with cables 9, it is possible to use a hydraulic system, and a possible view of the hydraulic cylinder assembly is shown in the image of FIG. 14, where inside the body of the hydraulic cylinder 15 there is a liquid 39 limited by a piston 16 having seals 38. From below, to the narrow part of the hydraulic cylinder 15, it is possible to connect a hose through which the liquid will be transferred.

8. The images show a manual transmission with three forward gears and one reverse gear. In real conditions, the number of gears is practically unlimited for both forward and reverse gears, subject to the rotation and torque transmission scheme. The minimum manual transmission must contain one forward gear and one reverse gear.

9. Since the gear shift scheme is quite simple, the manual transmission allows the structure to be rotated 180 degrees as needed, provided that the tensioners 6 are correctly connected to the gearbox lever.

Examples of using:

Let's assume that a manual transmission is installed on a certain mechanism and a person needs to accelerate the mechanism to maximum speed and then engage reverse.

In this case, when the input shaft is spun by a mechanism (for example, an engine), the person engages first gear using the gearbox lever 12, while the cable 9 is pulled with one end towards the body of the gearbox lever 11, and with the other end fixed to the tensioner plate 6, it tightens this plate forcing the tensioner 6 to rotate on the shaft 4, ensuring that the roller 26 is pressed against the first gear belt 7. The first gear belt 7 is tensioned, providing better contact with the first gear pulleys 8 of the input and output shaft 3, which are secured to these shafts using splines. Next, the output shaft 3 spins up to the required speed, performing and transmitting the useful action.

When engaging the second gear, the person moves the gearshift lever 12 to the neutral position, thereby causing the cable 9 to loosen and the tensioner 6 to return to its original position (for example, due to the elastic forces of the belt 7). Then the second gear is engaged and the cable 9 of the second gear is retracted in the direction of the gearbox lever housing 11, and the second end fixed to the plate of the tensioner 6 pulls this plate, forcing the tensioner 6 of the second gear to rotate on the shaft 4, ensuring that the roller 26 is pressed against the belt 7 of the second gear. The belt 7 of the second gear is tensioned providing better contact with the pulleys 8 of the second gear of the input and output shaft 3 (depending on the speed achieved, the belt 7 may slip on the pulleys 8 until a balance is reached in revolutions between the input and output shafts according to the gear ratio), which secured to the specified shafts using splines. Next, the output shaft 3 spins up to the required speed, performing and transmitting the useful action.

When engaging third gear, the process is similar. The person moves the gearbox lever 12 to the neutral position, thereby causing the cable 9 to loosen and the tensioner 6 to return to its original position (for example, due to the elastic forces of the belt 7). Then the third gear is engaged and the cable 9 of the third gear is retracted in the direction of the gearbox lever housing 11, and the second end fixed to the plate of the tensioner 6 pulls this plate, forcing the tensioner 6 of the third gear to rotate on the shaft 4, ensuring that the roller 26 is pressed against the belt 7 of the third gear. The belt 7 of the third gear is tensioned providing better contact with the pulleys 8 of the third gear of the input and output shaft 3 (depending on the speed achieved, the belt 7 may slip on the pulleys 8 until a balance is reached in revolutions between the input and output shafts according to the gear ratio), which secured to the specified shafts using splines. Next, the output shaft 3 spins up to the required speed, performing and transmitting the useful action.

If it is necessary to engage the reverse gear, the person moves the lever 12 to the position corresponding to the reverse gear, while the reverse gear cable 9 is pulled at one end towards the body of the gearbox lever 11, and with the other end fixed to the tensioner plate 6, it tightens this plate, forcing the tensioner 6 to rotate on the shaft 4, ensuring pressing the roller 26 to the reverse gear belt 7. The reverse gear belt 7 is tensioned, providing better contact with the reverse gear pulley 8 of the input shaft 3, secured using splines, and the wheel 22 of the intermediate shaft 25. Next, the wheel 22 of the intermediate shaft 25, using an applied rubber coating 24, transmits rotation to the reverse gear wheel 23, mounted on output shaft 3 using splines through the rubber coating 24 applied to it (23). Next, the output shaft 3 spins to the required revolutions in the opposite direction, performing and transmitting the useful action.

In general, the above example is basic and describes the full operation of a manual transmission, however, taking into account possible design changes, additional examples should be taken into account. Additional examples will be given without taking into account the need to change gears, since the actions in different gears are similar.

When using a silicone coating instead of rubber 24: If it is necessary to engage reverse gear, a person moves lever 12 to the position corresponding to reverse gear... (the description in this part corresponds to the main example)... Next, the wheel 22 of the intermediate shaft 25, using the applied silicone coating 24, transmits rotation to the reverse gear wheel 23, installed on the output shaft 3 using splines, through a silicone coating 24 applied to it (23). Next, the output shaft 3 spins to the required revolutions in the opposite direction, performing and transmitting the useful action.

When using a keyed connection:

A person engages the first gear using the gearshift lever 12... (the description in this part corresponds to the main example).... The first gear belt 7 is tensioned, providing better contact with the first gear pulleys 8 of the input and output shaft 3, which are mounted on the indicated shafts with using a keyed connection(s). Next, the output shaft 3 spins up to the required speed, performing and transmitting the useful action.

If it is necessary to engage reverse gear, a person moves lever 12 to the position corresponding to reverse gear... (the description in this part corresponds to the main example)... The reverse gear belt 7 is tensioned, providing better contact with the reverse gear pulley 8 of the input shaft 3, secured using a keyed connection, and the wheel 22 of the intermediate shaft 25. Next, the wheel 22 of the intermediate shaft 25, using the applied rubber coating 24, transmits rotation to the reverse gear wheel 23, installed on the output shaft 3 using a keyed connection, through the rubber coating 24 applied to it (23). Next, the output shaft 3 unwinds up to the required revolutions in the opposite direction, performing and transmitting a useful action.

When using a silicone coating instead of a 24 rubber and keyed connection:

If it is necessary to engage reverse gear, a person moves lever 12 to the position corresponding to reverse gear... (the description in this part corresponds to the main example)... The reverse gear belt 7 is tensioned, providing better contact with the reverse gear pulley 8 of the input shaft 3, secured using a keyed connection, and the wheel 22 of the intermediate shaft 25. Next, the wheel 22 of the intermediate shaft 25, using the applied silicone coating 24, transmits rotation to the reverse gear wheel 23, installed on the output shaft 3 using a keyed connection, through the silicone coating 24 applied to it (23). Next, the output shaft 3 unwinds up to the required revolutions in the opposite direction, performing and transmitting a useful action.

When using a hydraulic drive instead of cables 9, the example will look like this:

The person engages the first gear using the gearbox lever 12, while pressing the piston 16 of the hydraulic cylinder 15 mounted on the body of the gearbox lever 11, which causes the fluid 39 to move through the hydraulic hose 19 to the hydraulic cylinder 15 installed on the gearbox housing 1. The hydraulic piston 16 pushed out by the fluid 39 rests against the tensioner plate 6 forces it to rotate on the shaft 4, ensuring that the roller 26 is pressed against the belt 7 of the first gear... (the description in this part corresponds to the main example)... Next, the output shaft 3 spins to the required speed, performing and transmitting the useful action.

If it is necessary to engage reverse gear, a person engages first gear using the gearbox lever 12, while pressing the piston 16 of the hydraulic cylinder 15 mounted on the body of the gearbox lever 11, which causes the movement of fluid 39 through the hydraulic hose 19 to the hydraulic cylinder 15 installed on the gearbox body 1. Pushed out by the liquid 39 the hydraulic piston 16 resting against the plate of the tensioner 6 causes it to rotate on the shaft 4, ensuring that the roller 26 is pressed against the reverse transmission belt 7... (the description in this part corresponds to the main example)... Next, the output shaft 3 spins to the required revolutions in the opposite direction, performing and transmitting the useful action .

When using a hydraulic drive instead of a cable 9 and a silicone coating instead of a rubber one 24:

If it is necessary to engage reverse gear, a person engages first gear using the gearbox lever 12, while pressing the piston 16 of the hydraulic cylinder 15 mounted on the body of the gearbox lever 11, which causes the movement of fluid 39 through the hydraulic hose 19 to the hydraulic cylinder 15 installed on the gearbox body 1. Pushed out by the liquid 39, the hydraulic piston 16 resting against the plate of the tensioner 6 forces it to rotate on the shaft 4, ensuring that the roller 26 is pressed against the reverse gear belt 7…. (the description in this part corresponds to the main example) ... Next, the wheel 22 of the intermediate shaft 25, using the applied silicone coating 24, transmits rotation to the reverse gear wheel 23, mounted on the output shaft 3 using splines, through the silicone coating 24 applied to it (23). Next output shaft 3 spins to the required speed in the opposite direction, performing and transmitting a useful action.

When using a hydraulic drive and a keyed connection: A person engages first gear using the gearbox lever 12, while pressing the piston 16 of the hydraulic cylinder 15 mounted on the body of the gearbox lever 11, which causes the fluid 39 to move through the hydraulic hose 19 to the hydraulic cylinder 15 mounted on the gearbox body 1. The hydraulic piston 16 pushed out by the liquid 39, resting against the plate of the tensioner 6, forces it to rotate on the shaft 4, ensuring that the roller 26 is pressed against the first gear belt 7. The first gear belt 7 is tensioned, providing better contact with the first gear pulleys 8 of the input and output shaft 3, which are secured to these shafts using a keyed connection. Next, the output shaft 3 spins up to the required speed, performing and transmitting the useful action.

If it is necessary to engage reverse gear, a person engages first gear using the gearbox lever 12, while pressing the piston 16 of the hydraulic cylinder 15 mounted on the body of the gearbox lever 11, which causes the movement of fluid 39 through the hydraulic hose 19 to the hydraulic cylinder 15 installed on the gearbox body 1. Pushed out by the liquid 39, the hydraulic piston 16 resting against the plate of the tensioner 6 forces it to rotate on the shaft 4, ensuring that the roller 26 is pressed against the reverse gear belt 7. The reverse gear belt 7 is tensioned, providing better contact with the reverse gear pulley 8 of the input shaft 3, secured using a key connection, and the wheel 22 of the intermediate shaft 25. Next, the wheel 22 of the intermediate shaft 25, using an applied rubber coating 24, transmits rotation to the reverse gear wheel 23 installed on the output shaft 3 using a keyed connection, through the rubber coating 24 applied to it (23). Next, the output shaft 3 spins to the required revolutions in the opposite direction, performing and transmitting the useful action.

Using hydraulic drive, silicone coating and keyed connection:

If it is necessary to engage reverse gear, a person engages first gear using the gearbox lever 12, while pressing the piston 16 of the hydraulic cylinder 15 mounted on the body of the gearbox lever 11, which causes the movement of fluid 39 through the hydraulic hose 19 to the hydraulic cylinder 15 installed on the gearbox body 1. Pushed out by the liquid 39, the hydraulic piston 16 resting against the plate of the tensioner 6 forces it to rotate on the shaft 4, ensuring that the roller 26 is pressed against the reverse gear belt 7. The reverse gear belt 7 is tensioned, providing better contact with the reverse gear pulley 8 of the input shaft 3, secured using a key connection, and the wheel 22 of the intermediate shaft 25. Next, the wheel 22 of the intermediate shaft 25, using an applied silicone coating 24, transmits rotation to the reverse gear wheel 23 installed on the output shaft 3 using a keyed connection, through the silicone coating 24 applied to it (23). Next, the output shaft 3 spins to the required revolutions in the opposite direction, performing and transmitting the useful action.

Claims (6)

1. Belt gearbox, including a housing, bearings, shafts, pulleys, wheels, belts and tensioners, characterized in that closed type bearings are used, the shafts are made with splines or a keyed connection, when the gear is engaged, the tensioner is activated by a cable or hydraulic drive , tensions the belt on the pulleys, ensuring the transmission of rotation and torque from the input shaft to the output shaft, and when reverse gear is engaged, torque is additionally transmitted through the intermediate shaft, using rubber-coated or silicone-coated wheels that come into contact, changing the direction of rotation of the output shaft 2. Belt gearbox according to claim 1, characterized in that the tensioner is equipped with a return spring. 3. Belt gearbox according to claim 1, characterized in that the hydraulic piston is connected to the tensioner with a bolt. 4. Belt gearbox according to claim 1, characterized in that the tensioner is equipped with a roller secured using bearings. 5. Belt gearbox according to claim 1, characterized in that the intermediate wheel of the reverse gear has a part made in the form of a pulley. 6. Belt gearbox according to claim 1, characterized in that spacers are used between the pulleys and between the outer pulleys and bearings.