JPH10119596A - Drive axle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive axle having a fewer number of component members at a low structural and manufacturing cost. SOLUTION: This drive axle is provided with a traveling motor 4 and two reduction gear devices 17, 26 arranged at the end sections of the axle, and one of the reduction gear devices 17, 26 is provided to drive one wheel. The driving force is transmitted from the traveling motor 4 to the wheel through one input stage of the reduction gear devices 17, 26 and at least one final stage. A common single-stage planetary gear device 12 is used for the input stage of the reduction gear devices 17, 26, and the planetary gear device 12 is connected to the final stages of both reduction gear devices 17, 26 via driven shafts 15, 25 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a drive axle, comprising a traction motor and two reduction gear units arranged at the end of the axle, in particular configured as planetary gear units. One reduction gear train is provided for driving each of the two wheels, and a power transmission path to the wheels driven by the traveling motor is transmitted through an input stage of the reduction gear train and at least one last stage. In the form of

[0002]

BACKGROUND OF THE INVENTION Such drive axles are used in motor vehicles. In order to reduce the rotational speed accordingly and thus achieve an increase in the torque on the driven wheels, a reduction gearing having at least one transmission stage is arranged between the traveling motor and the driven wheels. . It is known for a drive axle according to the known art to configure the reduction gear as a multi-stage reduction gear, usually as a two-stage reduction gear, in particular as a planetary gear. In this case, the first transmission stage is the input stage and the second transmission stage forms the final stage. Therefore, in such a drive axle with a two-stage planetary gear set as a reduction gear set, two planetary gear sets having a total of four planetary stages must be provided. 2 configured as a spur gear device
In a staged reduction gear set, there are again four transmission stages. This results in significant construction costs for the drive axle.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drive axle of the type mentioned at the outset, which has a relatively small number of components and reduces construction and manufacturing costs.

[0004]

In order to solve the above-mentioned problems, according to the construction of the present invention, the input stage of the reduction gear unit is configured as a common single-stage planetary gear unit, and each of the planetary gear units has One driven shaft is connected to the last stage of both reduction gear units.

[0005] Compared to known drive axles, the drive axle according to the invention has fewer components. This is because one common transmission input stage is used instead of two multi-stage reduction gears. Thereby, the configuration of the reduction gearing, and thus also the configuration of the drive axle, can be simplified by omitting the components. Thus, manufacturing costs can be reduced.

The use of two driven shafts, each of which is operatively connected to the last stage of the reduction gearing, makes it possible simultaneously to compensate for different rotational speeds of the wheels driven in a curve. According to the invention, the input stage of the reduction gear
By replacing it with a common single-stage planetary gear set having two driven shafts, the function of the differential gear set is realized. This greatly reduces the construction costs of the drive axle. This is because a unique differential gearing can be omitted for a driving axle of a known technique. Another advantage is that
The structural space required by the drive axle is reduced.
In addition, manufacturing costs can be reduced.

In another advantageous configuration of the invention, the planetary gear set has a rotatable sun gear, a rotatable planet carrier and a rotatable internal gear, and one rotation of the planetary gear set. A possible component is drivingly coupled to the driven shaft, and a separate rotatable component of a respective one of the satellite gears is used to drive the reduction gear.
Operatively coupled to the driven shaft and the second driven shaft. Thus, the sun gear, the planet carrier and the internal gear of the planetary gear set can rotate independently of one another and have different rotational speeds. At that time, by appropriately selecting the driving element and the driven element of the planetary gear set, any speed increase and reduction between the driving element and the driven element of the planetary gear set can be achieved.

When the road condition changes or the vehicle is equipped with a drive axle according to the present invention, the vehicle is driven by a driven element based on independently rotatable driven elements of a planetary gear set. Can easily be compensated for. To this end, the drive axle according to the invention does not require a unique differential gearing, unlike the drive axles of the known art. Because the function of the differential gearing is
This is because they are incorporated in a common gearing input stage configured as a planetary gearing. The planetary gear set thus integrates the function of the differential gear set with the function of the gear set input stage of the reduction gear set. By doing this,
The number of components in the drive axle according to the invention is significantly reduced compared to drive axles of the known art.

In an advantageous embodiment of the invention, the sun gear of the planetary gear set is operatively connected to the driven shaft, the planet carrier is drivingly connected to the first driven shaft, and the internal gear is driven to be connected to the second driven shaft. Are combined. This results in different rotation speeds and rotation directions on the driven shaft. In addition, it is driven via the sun gear of the planetary gear set, is driven via the planet carrier on the one hand, and is driven via the internal gear on the other hand, thereby slowly increasing the speed between the drive shaft and the driven shaft. It becomes possible to do. With this configuration, a first reduction of the input speed of the travel motor is achieved, so that one transmission step in the reduction gearing can be omitted.

In a second embodiment of the invention, the driven shaft is drivingly connected to the internal gear, and one driven shaft is connected to each of the sun gear and the planet carrier. Therefore, by appropriately selecting the form of the rotatable component,
Arbitrary speed increase between the drive shaft and each driven shaft can be achieved. When rapidly increasing the speed between the drive shaft and the driven shaft,
For example, the diameter of the driven shaft can be reduced. This is because relatively small torque needs to be transmitted to the reduction gear device. In addition, the planet carrier can be operatively connected to the drive shaft and can be provided with sun gears and internal gears as driven elements.

According to another embodiment of the invention, the reduction gear units are each configured as a single-stage planetary gear unit. When driving the sun gear of the planetary gear set and performing the first reduction of the input rotation speed in the planetary gear set, the configuration of the reduction gear set can be reduced by one transmission step. is there. Therefore, the increase of the torque to the wheels driven by the traveling motor is performed in the planetary gear unit and the reduction gear unit. Thus, the drive axle according to the invention has three planetary gear sets with only a total of three planetary stages relative to the drive axle of the known art.

Thus, by omitting the gear input stage and the unique differential gearing in the reduction gearing, additional structural space is obtained in the axle box in the axial direction for existing or additional components. Can be

The driven shafts are each configured as sun gears of a reduction gear train, the first reduction gear train is driven via a planet carrier and the internal gear is fixed relative to the axle box. It is particularly practical if the drive of the second reduction gearing takes place via an internal gear and the planet carrier is fixed relatively to the axle box. Thereby, the different rotation speeds and different rotation directions of the driven shaft in the planetary gear set are compensated by the two final stages in the reduction gear set.

In the configuration of the present invention, the reduction gear device is configured as a single-stage spur gear device, and one spur gear device is provided with a reversal of the rotation direction of the driven shaft. In this case, the last stage of the reduction gear unit is configured as a single-stage spur gear unit, and different rotation directions of the driven shaft of the planetary gear unit are compensated in the spur gear unit. This results in an arrangement that also has only three transmission stages, so that a simple construction of the drive axle according to the invention is achieved by omitting the differential gearing independent of the gearing input stage.

Here, it is particularly practical if the spur gear units each have one gear pair and one spur gear unit has an idle gear arranged between the gear pairs. With this idle gear, a reversal of the rotational direction is achieved in the spur gear device. In doing so, different rotational directions of the driven shaft of the planetary gear set can be compensated for by the spur gear set.

In a preferred embodiment of the invention, the drive shaft is designed as a hollow shaft and is arranged coaxially with the driven shaft and surrounds one driven shaft. This allows
The fact that the driven shaft extends through the center of the drive shaft and the driven shaft is arranged coaxially with the drive shaft makes it possible to reduce the radial structural space for the drive axle.

Further, the drive shaft is configured as a shaft of a traveling motor arranged in the axle box, and is supported by a rolling bearing in the axle box, and the range of the axle box in which the traveling motor is arranged is limited. It is particularly practical if hermetically sealed with respect to the planetary gear set and the reduction gear set. By doing so, it is easily achieved that, on the one hand, the reduction gearing and the planetary gearing are immersed in the lubricant and, on the other hand, the traction motor is arranged in a motor chamber which is isolated from the lubricant.

Furthermore, it has been found practical if the running motor is formed as an electric motor or a hydraulic motor. Since the motor chamber can be simply sealed with respect to the gear device component supplied with the lubricant, the driving axle according to the present invention can reduce the structural cost as compared with the known driving axle. In addition, the elimination of the differential gearing makes it possible to utilize the structural space of the electric motor additionally obtained in the axial direction of the drive axle. By doing so, it is possible, on the one hand, to mount a higher power electric motor. On the other hand, with the same magnitude of output of the electric motor, the radial dimension of the electric motor can be reduced. By doing so, the diameter of the axle box can also be reduced. This makes it possible, for example, to increase the ground clearance of a motor vehicle equipped with a drive axle according to the invention.

An advantageous embodiment of the invention lies in the fact that the planetary gear unit is provided with a brake device having a common brake operating device. In a drive axle according to the known art, there is in each case a brake device with a brake operating device in a high torque range on both two driven shafts. On the other hand, in the planetary gear device of the drive axle according to the present invention, the driven shaft and both driven shafts can easily reach and approach from one brake device. This makes it possible to arrange one brake device with a brake operating device, which acts directly on the driven shaft. In this way, by eliminating components for the braking device, the construction costs are simplified with respect to the drive axles of the known art.

Here, it has been found that it is practical to arrange the brake device in the axial direction between the traveling motor and the planetary gear device to constitute a multi-plate brake. By arranging the braking device in the area of the planetary gear set, a smaller sized braking device can be used. This is because the braking force is generated in the range of the force transmission path. In addition, the use of a multi-plate brake circulating in the lubricant of the differential gear reduces wear on the brake.

Furthermore, the sun gear and the planet carrier of the planetary gear set or the sun gear and the internal gear of the planetary gear set are each provided with at least one brake plate and non-rotatable,
It is practical to be connected so that it can move in the axial direction. Another practical configuration of the brake device is that the internal gear and the planet carrier of the planetary gear set are each connected to at least one brake plate in a non-rotatable and axially movable manner. In this way, the drive shaft and one of the two driven shafts are braked by a common brake device having a brake operating device, or act directly on the components of the planetary gear set which are operatively connected to both driven shafts. It is possible to provide a braking device.

Various systems can be used as the brake operating device, ie, a hydraulic system, a pneumatic system, an electric system or a mechanical system. However, it is advantageous if the brake actuating device is designed as an annular piston, which forms an annular space for supplying the pressure medium together with the axle box. Furthermore, the braking device can be configured as a spring brake.

This reduces the construction costs. This is because, instead of two brake devices, only one brake device having a brake operating device is present in the reduction gear device of the wheel or the drive axle. By omitting the braking device, the number of components is reduced, thereby reducing the production costs. Here, as another advantage, it can be pointed out that omitting one brake device provides additional structural space for existing components or additional components in the axial box in the axial direction.

It is particularly practical to use the drive axle according to the invention in floor transport vehicles, in particular in counterweight forklifts with electric or hydraulic drive. By using a common gearing input stage having a differential gearing function, and omitting the gearing input stage in the independent differential gearing and the reduction gearing as a result, the structural space is reduced, thereby reducing the space inside the axle box. Can be used for other components. For example, it is possible to use the obtained structural space in the axial direction of the electric motor. Thereby, it is possible to equip the floor transport vehicle with a high-output drive device. On the other hand, it is possible to radially reduce the dimensions of the electric motor and the axle box without changing the output of the electric motor. By doing this,
Increase the ground clearance of the truck above the floor. In addition, the drive axle can be located near the lifting means of the counterweight forklift, thereby reducing the size of the protrusion.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS Other advantages and details of the invention will be described below in more detail with reference to an exemplary embodiment of the invention shown in the schematic drawing.

FIG. 1 shows a drive axle according to the invention with an axle box 1. At the outer end, one housing 2 and 3 are connected to the axle box 1, respectively, in which the reduction gear units 17 and 26 are arranged. An electric motor 4 is arranged in the axle box 1, and its rotor 5 is non-rotatably connected to a drive shaft 6 formed as a hollow shaft and drives a single-stage planetary gear unit 12. The drive shaft 6 is rotatably supported in the axle box 1 by rolling bearings 7 and 8. The area in which the traveling motor of the axle box 1 is arranged is sealed by sealings 9 and 10.

The drive shaft 6 has a row of teeth at the end facing the planetary gear train 12, which forms the sun gear 11 of the planetary gear train 12. The sun gear 11 is connected to several planetary gears 13. The planet gear 13 is rotatably supported on a planet carrier 14 and rolls along an internal gear 24. The planet carrier 14 extends through the drive train 6 through the drive shaft 6 to the left in the view of the axle box 1.
Of the driven shaft 15 is driven. Internal gear 2 of planetary gear set 12
4 is non-rotatably connected to a second driven shaft 25 extending to the right side of the axle box 1.

A sun gear 16 of a reduction gear unit 17 configured as, for example, a single-stage planetary gear unit is integrally formed on the driven shaft 15 at an end opposite to the planetary gear unit 12. The planetary gear 18 of the reduction gear train 17 is rotatably arranged on a planet carrier 19. The support journal of the planet carrier 19 is formed on the axle box 1 or is non-rotatably connected thereto. The hollow shaft 20 of the reduction gear unit 17 is drivingly connected to the final driven shaft 21a.

The driven shaft 25, which is connected to the internal gear 24 of the differential gearing 12, is configured as a sun gear of a single-stage planetary gearing which also forms a reduction gearing 26 for the right-hand region in the drawing of the drive axle. . Internal gear 2 of reduction gear device 26
7 is non-rotatably connected to the housing 3. It is also possible to form the internal gear 27 on the inner wall of the housing of the housing 3. As driven element of the reduction gear train 26, a planet carrier 28 is provided which is operatively connected to the final driven shaft 21b via a tooth row.

Each of the final driven shafts 21a, 21b is formed with one wheel flange 22a, 22b provided to hold the wheel rims 23a, 23b. The final driven shafts 21a, 21b are rotatably supported in the wheel hub housings 2 and 3 by bearings 6a and 6b.

A brake device 30 is provided between the electric motor 1 and the planetary gear device 12. The brake device 30 can be configured, for example, as a multi-plate brake with several brake plates 31, 32 and 33, for example. Brake plate 31
Is fixed non-rotatably, but axially movable, to a drive shaft 6 configured as a sun gear 11 of a differential gearing 12. The brake plates 32 and 33 are operatively connected in the same manner as the planet carrier 14 and the internal gear 24 of the differential gearing 12. Brake plates 31 to 3
Between the three, one brake plate 34 is arranged. The brake plate 34 is also operatively connected to the axle box 1 or to a component that is non-rotatably connected to the axle box, but is non-rotatable but movably in the axial direction. In this case, it is sufficient to equip the drive shaft 6, the planet carrier 14 and the internal gear 24 with a brake plate. Similarly, only the planet carrier 14 and the internal gear 24 may be provided with a brake plate. Several brake plates 3 each constituting one plate package
It is also possible to provide 1, 32 and 33 respectively. An annular piston 35 is provided as a rake operating device. The annular piston 35, together with the axle box 1, forms a piston chamber 36 capable of supplying hydraulic fluid.

Therefore, according to the present invention, the electric motor 5
Drives the sun gear 11 of the planetary gear set 12 via the drive shaft 6. The drive of the reduction gear units 17 and 26 is performed by the driven shafts 15 and 25. The driven shafts 15 and 25 are operatively connected to the planet carrier 14 and the internal gear 24 of the differential gear unit 12. This arrangement makes it possible, on the one hand, to compensate for the rotational speed of the driven wheels and, on the other hand, to incorporate a first speed increase in the planetary gear set. The different speeds and directions of rotation of the planet carrier 14 and the internal gear 24, and thus of the driven shafts 15 and 25, are compensated by different speed increases in the reduction gearing 17 and 26. The drive axle therefore only has a total of three single-stage planetary gear sets 12, 17 and 26, respectively, which can significantly reduce the construction and manufacturing costs.

FIG. 2 shows a schematic view of the drive axle according to FIG.
Is driven. The planet carrier 14 and the internal gear 24 of the planetary gear set 12 are connected to one driven shaft 15 and 25, respectively, and at the same time constitute the sun gear of the reduction gear sets 17 and 26, also configured as planetary gear sets. I have. The planet carrier 19 of the reduction gear unit 17 on the left side of the figure is fixed non-rotatably to, for example, an axle box. By doing so, driving to the final driven shaft 21a is performed via the internal gear 20. On the contrary,
In the reduction gear device 26 shown on the right side in the drawing, the internal gear 27 is non-rotatably fixed to the box member, so that the final driven shaft 21b is operatively connected to the planetary gear device 28.

FIG. 3 shows a modification of the drive axle according to the present invention. In this case, the arrangement of the driven elements of the reduction gear units 17 and 26 is different from the configuration according to FIG. In the left reduction gear unit 17, the driving of the final driven shaft 21 a is performed via the planetary gear unit 19. At this time,
The internal gear 20 is non-rotatably formed on the axle box. On the other hand, in the reduction gear device on the right side, since the planet carrier 28 is fixed to the box member, the final driven shaft 21b is non-rotatably connected to the internal gear 27.

2 and 3 that the driven shafts 15 and 25 have different rotation speeds and rotation directions by appropriately setting the driven elements of the reduction gear device by two types of reduction gear devices configured as a single-stage planetary gear device. Obviously, the choice can be easily compensated.

FIG. 4 shows the configuration of a driven shaft according to the present invention having reduction gear units 17 and 26 each configured as a single-stage spur gear unit. The reduction gear unit 26 has a gear pair including a gear 40 and a gear 41. The gear 40 is non-rotatably connected to the driven shaft 25, and the gear 4
Numeral 1 is drivingly connected to the final driven shaft 21b. The reduction gear unit 17 includes a gear 42 connected to the driven shaft 15 and a gear 44 connected to the final driven shaft 21a.
An idle gear 43 is arranged between 2 and 44. Here, the idle gear 43 is rotatably supported, for example, on a journal 45 fixed to the axle box. Idle gear 43
Thereby, the reversal of the rotation direction is achieved in the reduction gear device 17. By doing so, different rotational directions of the driven shafts 15 and 25 are easily compensated for using a reduction gear train configured as a spur gear train.

For example, the planet carrier 14 and the internal gear 2
The brake device 30, which has a brake plate 34 connected to 4, can likewise be arranged radially outside the planetary gear set 12.

If, for example, the use of a low-speed traveling motor requires a relatively small deceleration from the traveling motor to the wheels driven, the driven shaft can also be directly operatively connected to the final driven shaft. In order to produce the same rotational direction and the same rotational speed of the second driven shaft, the other driven shaft is connected to a single-stage reduction gearing, for example a planetary gearing, in which an internal gear or a planet carrier is connected to the final driven shaft. Operatively coupled.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a drive axle according to the present invention.

FIG. 2 is a schematic view of a drive axle according to FIG. 1;

FIG. 3 is a schematic view of a modified example of a drive axle.

FIG. 4 is a schematic view of another modified example of the drive axle.

[Explanation of symbols]

1 axle box, 4 traction motor, 6 drive shaft, 7 rolling bearing, 8 rolling bearing, 9 sealing,
Reference Signs List 10 sealing, 11 sun gear, 12 planetary gear device, 14 planet carrier, 15 driven shaft, 1
7 reduction gear device, 20 internal gear, 24 internal gear,
25 driven shaft, 26 reduction gear device, 27 internal gear,
30 brake device, 31 brake plate, 3
2 brake plate, 33 brake plate,
35 piston, 36 annular space, 40 gear pair,
41 gear pair, 42 gear pair, 43 idle gear,
44 Gear pair

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[Procedure amendment]

[Submission date] December 9, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

7. The driven shaft (6) is formed as a hollow shaft and is arranged coaxially with the driven shaft (15, 25) and surrounds one driven shaft (15). From 1
The drive axle according to any one of claims 6 to 13.

And 8. is formed as a shaft of the running motor to drive shaft (6) is disposed in the axle box (1) in (4), by a bearing (7, 8) rolling in the axle box (1) The area where the traveling motor (4) of the axle box (1) is supported is sealed with respect to the planetary gear set (12) and the reduction gear set (17, 26). A drive axle according to any one of claims 1 to 7 .

Wherein said traveling motor (4) is configured as an electric motor or a hydraulic motor, driving axle according to claim 8.

To wherein said planetary gear unit (12), a brake system having a common brake operating device (30) is disposed, any one drive axle as claimed in claims 1 to 9.

11. said brake device (30) is disposed between the traveling motor in the axial direction (4) planetary gear (12) is configured as a multi-plate brake, according to claim 10 Drive axle as described.

12. The sun gear (11) and the planet carrier of the planetary gear unit (12) (14), or said sun gear (11) and the internal gear of the planetary gear (12) (24) , each of the at least one brake plate (31, 32, 33) and unrotatable, and attached movably in the axial direction, according to claim 10 or 11 drive axle according.

Wherein said said internal gear (24) and the planet carrier of the planetary gear (12) (14), at least one brake plate (32, 33) and unrotatable respectively, and movable in the axial direction 2. The combination of claim 1
12. Drive axle according to 0 or 11 .

14. An annular piston (35) as an operating device.
And the annular space (3) for supplying the pressure medium together with the axle box (1) is provided.
Forming a 6), any one of claims 10 to 13 for 1
The driving axle according to the item.

15. The drive axle of any one of claims 1 14, floor truck, characterized by the use in the counterweight forklift truck in particular having an electric drive or hydraulic drive, the use of the drive shaft Law.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

BACKGROUND OF THE INVENTION Such drive axles are used in motor vehicles. In order to reduce the rotational speed accordingly and thus achieve an increase in the torque on the driven wheels, a reduction gearing having at least one transmission stage is arranged between the traveling motor and the driven wheels. . It is known for a drive axle according to the prior art to configure the reduction gear as a multi-stage reduction gear, usually as a two-stage planetary gear . In this case, the first planetary stage is the input stage and the second planetary stage forms the final stage. Therefore, in such a drive axle having a two-stage planetary gear set as a reduction gear set, two planetary gear sets having a total of four planetary stages must be provided . This ensures that significant structural cost for the drive axle occurs.

[Procedure amendment 3]

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[Procedure amendment 4]

[Document name to be amended] Statement

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[Procedure amendment 5]

[Document name to be amended] Statement

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[Procedure amendment 6]

[Document name to be amended] Statement

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[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

If, for example, the use of a low-speed traveling motor requires a relatively small deceleration from the traveling motor to the wheels driven, the driven shaft can also be directly operatively connected to the final driven shaft. In order to produce the same rotational direction and the same rotational speed of the second driven shaft, the other driven shaft is a single-stage planetary gear whose internal gear or planetary carrier is connected to the final driven shaft.
It is operatively connected to the vehicle device .

[Procedure amendment 8]

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[Procedure amendment 9]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Deleted

Claims (17)

[Claims] 1. A drive axle, comprising a traveling motor (4) and two reduction gear units (17, 2) arranged at the end of the axle.
6), and one reduction gear unit (17, 26) is provided for driving one wheel, and transmission of force from the traveling motor (4) to the driven wheel. Of the type wherein the path is through one input stage and at least one last stage of said reduction gear train (17, 26), wherein said input stage of said reduction gear train (17, 26) is a common single stage A planetary gear set (12), which is connected to the last stage of both reduction gear sets (17, 26) via one driven shaft (15, 25) each. Driving axle characterized. 2. The planetary gear set (12) comprising a rotatable sun gear (11), a rotatable planet carrier (14) and a rotatable internal gear (24). Any one rotatable component (11, 14, 24) of (12) is drivingly connected to the drive shaft (6), and each one rotatable component of the satellite gearing (12). A first driven shaft (15) for driving the reduction gear device (17, 26) (11, 14, 24).
2. The drive axle according to claim 1, wherein the drive axle is operatively connected with the second driven shaft. 3. The sun gear (11) of the planetary gear set (12) is operatively connected to the drive shaft (6), and the planet carrier (14) is connected to the first driven shaft (15). A drive axle according to claim 2, wherein the internal gear (24) of the planetary gear set (12) is drivingly connected with the second driven shaft (25). 4. The drive shaft (6) is drivingly connected to the internal gear (24) of the planetary gear set (12), and the sun gear (11) of the planetary gear set (12) is connected to the second gear. 3. The drive axle according to claim 2, wherein the planetary carrier (14) of the planetary gear set (12) is operatively coupled with the second driven shaft (25). 4. . 5. The drive axle according to claim 1, wherein the reduction gear units (17, 26) are each configured as a single-stage planetary gear unit. 6. The driven shaft (15, 25) is each configured as a sun gear of the reduction gear train (17, 26), and the driven gear of the first reduction gear train (17, 26) is a planet carrier. (19, 28) and the internal gears (20, 2) of the first reduction gear train (17, 26).
7) is relatively stationary with respect to the axle box (1);
The second reduction gear train (26, 17) is driven by an internal gear (27, 20), and the planetary carriers (28, 19) of the second reduction gear train (26, 17) 6. The drive axle according to claim 5, wherein the drive axle is stationary relative to the axle box. 7. The reduction gear device (17, 26) is configured as a single-stage spur gear device, and one spur gear device is provided with a rotation direction reversal of the driven shaft (15, 25). Item 5. The drive axle according to any one of Items 1 to 4. 8. The spur gear set has a respective gear pair (40, 41:42, 44), wherein one spur gear set is disposed between the gear pair (42, 44). The drive axle according to claim 7, comprising a gear (43). 9. The driven shaft (6) is formed as a hollow shaft and is arranged coaxially with the driven shaft (15, 25) and surrounds one driven shaft (15). A drive axle according to any one of claims 1 to 8. 10. The drive shaft (6) is formed as a shaft of a travel motor (4) arranged in an axle box (1),
The range in which the traveling motor (4) of the axle box (1) is arranged is supported by the rolling bearings (7, 8) in the axle box (1). Sealed against the reduction gearing (17, 26);
A drive axle according to claim 1. 11. The drive axle according to claim 10, wherein the travel motor (4) is configured as an electric motor or a hydraulic motor. 12. The drive axle according to claim 1, wherein a brake device (30) having a common brake operating device is arranged on the planetary gear device (12). 13. The brake device (30) is arranged axially between the travel motor (4) and the planetary gear set (12) and is configured as a multi-plate brake. Drive axle as described. 14. The sun gear (11) and the planet carrier (14) of the planetary gear set (12), or the sun gear (11) and the internal gear (24) of the planetary gear set (12). 14. The drive axle according to claim 12, wherein each of said at least one brake plate (31, 32, 33) is non-rotatably and axially movably connected. 15. The internal gear (24) and the planet carrier (14) of the planetary gear set (12) are each non-rotatable and axially movable with at least one brake plate (32, 33). 2. The combination of claim 1
14. The drive axle according to 2 or 13. 16. An annular piston (35) as operating device
And the annular space (3) for supplying the pressure medium together with the axle box (1) is provided.
16. The method according to claim 12, wherein (6) is formed.
The driving axle according to the item. 17. Use of a drive axle according to any one of claims 1 to 16 for a drive axle, characterized in that it is used in a floor transport vehicle, in particular a counterweight forklift having an electric or hydraulic drive. Law.