DE102021210179B3 - Transmission shaft assembly for a drive for an industrial truck and method for manufacturing a transmission assembly - Google Patents

Abstract

The invention relates to a transmission shaft assembly (160) for a drive for an industrial truck, the transmission shaft assembly (160) having a transmission shaft (170) for transmitting drive power from the drive. In addition, the transmission shaft assembly (160) comprises a spur gear (165) which is non-rotatably connected to the transmission shaft (170) and an annular balancing part (200) which is arranged on the transmission shaft (170), the balancing part (200) being acted upon a force (F) is formed plastically deformable to compensate for an axial play within the transmission shaft assembly (160).

Description

The present invention relates to a gear shaft assembly for a drive for an industrial truck and to a method for producing a gear assembly.

Industrial trucks can be driven by electric drive units with a spur bevel gear. These can be characterized by a very compact design and a high torque density. The required lifetimes can be very long. In particular, the gearing and the bearing of the bevel gear shaft on the pinion head side are the components that limit the service life. The shaft-hub connection between the bevel gear shaft and the spur gear can also be heavily loaded. The space available for storing the bevel gear shaft is limited and, depending on the design of the gear, can be specified by the permissible radius of the drive’s enveloping circle and additionally or alternatively by the required load capacity of the bevel gear set. In the EP 1 285 803 A1 a transmission is described in which the bearing of the bevel gear shaft is a tapered roller bearing in an X arrangement. The bearings are arranged outside of the bevel gear teeth and the spur gear teeth.

In this context, describes the DE 101 32 318 A1 a one-wheel drive, in particular for industrial trucks, consisting of a gear housing with at least one gear stage, a flanged drive motor and a driven impeller. In order to achieve the smallest possible installation space and simplified assembly and disassembly of the unicycle engine, it is provided that the impeller is directly connected in a rotationally fixed manner to a gear wheel and that the gear wheel is rotatably mounted on a housing part.

From the DE 10 2011 009 101 A1 a device for mounting a pinion shaft of a differential for motor vehicles is known, the pinion shaft driving the differential and having a drive pinion being rotatably mounted via two roller bearings which are inserted into a housing of the differential and are spaced apart axially, of which a first, inner roller bearing is closer to the drive pinion is arranged out as a second, outer roller bearing. The roller bearings are positioned in an O arrangement, with provision being made for a drive gear wheel to be arranged on the pinion shaft in the area between the two roller bearings, which is pushed onto the pinion shaft by means of a sliding connection and is held in a non-rotatable or form-fitting manner in the circumferential direction . In addition, the drive gear wheel is prestressed against an annular shoulder of the pinion shaft by means of a spring element via an intermediate ring that is connected to it and pushed onto the pinion shaft and via an inner ring of the outer roller bearing that is connected to the intermediate ring, with the spring element being located between the inner ring of the outer roller bearing and a circlip snapped into an annular groove of the pinion shaft.

The DE 10 2005 046 327 A1 describes a bevel gear differential with side gears. At least one side gear is supported on a differential housing via an axially prestressed, tolerance-compensating spring element.

From the CN 1 07 341 302 B a corrugated sleeve in a motor vehicle drive is known. The sleeve can be arranged on a shaft between two bearings and prestresses the bearings against one another when the bearings are assembled due to their corrugated shape.

Against this background, it is the object of the invention to propose an improved transmission shaft assembly for a drive for an industrial truck and an improved method for producing a transmission assembly.

This object is achieved according to the invention by the gear shaft assembly for a drive for an industrial truck according to claim 1, by the drive for an industrial truck according to claim 9 and by the method for producing a gear assembly according to claim 11. Advantageous configurations result from the dependent claims and the following description.

With the transmission shaft assembly presented here, a bearing is advantageously created that can be designed in such a way that it reliably meets the service life requirements of a drive and, in addition, sufficient space is available for gearings in order to optimize the service life of such gearings. In addition, the pre-assembly of the gear shaft assembly can take place outside of the drive and can be done without nuts or screws, which can advantageously increase the process reliability during assembly and the functional reliability.

A gear shaft assembly for a drive for an industrial truck is presented, the gear shaft assembly having a gear shaft for transmitting a drive power of the drive. In addition, the transmission shaft assembly includes a spur gear, which is non-rotatably connected to the transmission shaft, and an annular compensating part, which is arranged on the transmission shaft, wherein the compensating part under the influence of a Force is formed plastically deformable or is plastically deformed to compensate for axial play within the transmission shaft assembly. For example, the industrial truck can be a fork lift truck or a lift truck with a spur-bevel gear. It may be necessary to axially secure the splined shaft connection between the bevel gear shaft and the spur gear, since the splined shaft profile can have a small amount of play, which can lead to small movements of the spur gear on the bevel gear shaft. The slight clearance may be necessary for the assembly process. If the spur gear were held in place by a nut, for example, these movements could cause the nut to loosen. To avoid loosening the nut, additional measures to secure the nut would be required. The mother lock must be designed with corresponding process reliability. If the overall height of the drive cannot be increased, the possible safety measures would be limited to measures that require a low overall height. In the transmission shaft assembly presented here, the axial play is advantageously secured or compensated for by means of the plastically deformable compensating part. This is ring-shaped, so that the transmission shaft can be passed through the compensating part. If the transmission assembly is pre-assembled, the compensating part can still be installed undeformed in order to facilitate assembly due to the axial play. In order to ensure that the connection is axially free of play after installation, the plastically deformable compensating part can be plastically deformed after pre-assembly, for example by applying radial forces to the compensating part, which lead to an elongation of the compensating part that is so great that an existing axial play of the preassembled components advantageously disappears. A dimension of the compensating part can thus increase along the axis of rotation of the transmission shaft as a result of the plastic deformation.

According to one embodiment, the transmission shaft can be formed as a bevel gear shaft with teeth. Thus, the bevel gear shaft can have a bevel gear toothing as the toothing. For example, the drive of the industrial truck can include an electric drive unit or an electric machine with a spur-bevel gear. These are advantageously characterized by a very compact design and a high torque density.

According to the invention, it is provided that the compensating part is arranged on the transmission shaft in a rotationally fixed manner between the spur gear and an inner ring of a bearing for supporting the transmission shaft. For example, the bearing can be formed as a tapered roller bearing. The inner ring can, for example, be preassembled together with the gear shaft, the plastically deformable compensating part and the spur gear outside of the gear. Advantageously, the occurring axial play can be limited to a minimum by a preassembled inner ring, which can then be compensated for by deforming the compensating part. Due to the plastic deformation, the compensating part can be pressed between the inner ring of the bearing and the spur gear. According to one embodiment, the plastic deformation brings about the non-rotatable connection between the compensating part and the transmission shaft.

According to a further embodiment, the compensating part can be formed as a hollow body. Thus, in the installed state of the compensating part, a cavity can be arranged between the transmission shaft and an outside of the compensating part. The cavity can be delimited by a ceiling, a floor and an outer wall of the compensating part. For example, the compensating part can be shaped like a tire, with an upper side and a lower side having an opening for the transmission shaft to pass through, for example. The top and bottom can be connected through the outside, so that the cavity can be formed between the three sides of the balancer and the gear shaft. Such an embodiment can advantageously save material and achieve a defined deformability.

In addition, the outside of the compensating part can be arched in an undeformed state of the compensating part, it being possible for the arched shape to be plastically flattened under the action of the force. The outside can, for example, be curved outwards in the non-deformed state of the compensating part, that is to say away from the transmission shaft. Under the action of a force, this bulge can be pressed inwards towards the transmission shaft, as a result of which the outside can be flattened and the compensating part can be lengthened overall along the transmission shaft. A dimension of the compensating part can advantageously be changed in this way in order to compensate for the axial play without loading the material of the compensating part itself.

According to a further embodiment, the transmission shaft assembly can have a further bearing for supporting the transmission shaft, which can be arranged on a drive side of the transmission shaft assembly. For example, the transmission shaft, which can be formed as a bevel gear shaft, for example, can be mounted with two tapered roller bearings. The bevel gear teeth can be below both bearings, for example arranged, but the spur gear must be fastened between the two bearings on the bevel gear shaft. While the inner ring of the lower tapered roller bearing can rotate and the outer ring can be stationary, the outer ring of the upper tapered roller bearing can rotate and the inner ring be stationary. Advantageously, such a known design can minimize the cost and labor involved in assembly.

According to a further embodiment, the transmission shaft assembly can include a securing element for securing the spur gear. For example, the securing element can be formed as a fixing pin or securing ring, for example on the drive side of the transmission shaft assembly, and advantageously secure the transmission shaft assembly axially. Advantageously, the space required for the transmission shaft assembly can be reduced by using a locking ring, since a locking ring takes up less space than a nut or two nuts. The assembly can also be simplified as a result. In this case, for example, the plastically deformable compensating part can be designed such that the radial forces are sufficient to bring about the deformation of the plastically deformable compensating part without overloading the retaining ring. According to one embodiment, the compensating part can also be arranged between the securing element and the spur gear, that is to say in general terms, between the securing element and the bearing arranged on the output side.

According to a further embodiment, the securing element can be formed as a snap ring. For example, the locking ring can be replaced by a snap ring with a square or round cross-section. The snap ring can be installed, for example, in the non-deformed state of the plastically deformable compensating part. In the deformed state of the plastically deformable compensating part, the snap ring can be completely or partially covered by a part lying in the bracing circuit, so that the snap ring cannot jump out of a groove in which the snap ring is accommodated. For example, if the shim is deformed, the snap ring may fit into a groove in a component of the transmission shaft assembly, such as a washer, so that the snap ring cannot snap out of place. Advantageously, the installation and operational safety can be increased by this design.

According to a further embodiment, the compensating part can have at least one notch. For example, the compensating part can have a plurality of radially arranged indentations, recesses or slots. The rigidity and the load-bearing capacity of the compensating part can advantageously be optimized as a result.

In addition, a drive for an industrial truck with a variant of the previously presented transmission shaft assembly is presented. In this case, the drive has an electric machine with a drive shaft, a gear of the drive shaft meshing with the spur gear of the transmission assembly or being coupled via at least one further transmission element. For example, the drive of the industrial truck can include an electric drive unit, or the electric machine, with a spur-bevel gear. For example, the electric machine can be mounted on a frame plate. In this case, for example, a transmission of the industrial truck can be fastened with the aid of a slewing ring so that it can pivot about the axis of the electric machine. A combination of a drive with the gear shaft assembly has the advantage that all of the aforementioned advantages can be optimally implemented.

According to one embodiment, the drive can have an output shaft, which can be coupled to the transmission shaft of the transmission shaft assembly directly or via at least one additional transmission element. For example, the transmission of the drive can include a housing cover and a housing which is screwed tightly to the housing cover and which can accommodate, for example, a spur gear stage, a bevel gear stage and an output shaft. The bevel gear stage can include the transmission shaft assembly presented here in the form of a bevel gear shaft assembly. When the electric machine is operating as a motor, the transmission can advantageously transmit the drive power from the electric machine to a vehicle wheel, which can be fastened to the output shaft, for example. For example, when the vehicle is decelerating, the electric machine can operate in generator mode and braking power can be transferred from the vehicle assembly to the transmission and from there to the electric machine.

In addition, a method for producing a variant of the transmission assembly presented above is presented. The method includes a step of providing the transmission shaft, the spur gear and the balancer, and a step of arranging the balancer and the spur gear on the transmission shaft and a step of plastically deforming the balancer to advantageously compensate for axial play within the transmission shaft assembly.

According to one embodiment, in the step of plastic deformation, the compensation be partially deformed under the action of a radial force along a longitudinal axis of the transmission shaft. For example, the plastically deformable compensating part can be plastically deformed after pre-assembly by applying radial forces to the compensating part. Advantageously, these can lead to a uniform lengthening of the compensating part, which can be so great that an existing axial play of the preassembled components disappears. The compensating part can thus be deformed by the plastic deformation to such an extent that a maximum thickness of the compensating part corresponds to a maximum distance between two components of the transmission assembly, between which the compensating part is arranged.

• 1 eine schematische Querschnittsdarstellung eines Antriebs für ein Flurförderfahrzeug gemäß einem Ausführungsbeispiel;
• 2 eine schematische Querschnittsdarstellung einer Getriebewellenbaugruppe gemäß einem Ausführungsbeispiel;
• 3 eine schematische Querschnittsdarstellung einer Getriebewellenbaugruppe mit einem verformten Ausgleichsteil gemäß einem Ausführungsbeispiel;
• 4A eine schematische Querschnittsdarstellung eines unverformten Ausgleichsteils gemäß einem Ausführungsbeispiel;
• 4B eine schematische Querschnittsdarstellung eines verformten Ausgleichsteils gemäß einem Ausführungsbeispiel;
• 5 eine schräge Draufsichtsdarstellung eines Ausgleichsteil ist gemäß einem Ausführungsbeispiel;
• 6 eine schematische Querschnittsdarstellung einer Getriebewellenbaugruppe gemäß einem Ausführungsbeispiel; und
• 7 ein Ausführungsbeispiel eines Verfahrens zum Herstellen einer Getriebebaugruppe.

The invention is explained in more detail by way of example with reference to the attached drawings. Show it:

• 1 a schematic cross-sectional view of a drive for an industrial truck according to an embodiment;
• 2 a schematic cross-sectional view of a transmission shaft assembly according to an embodiment;
• 3 a schematic cross-sectional view of a transmission shaft assembly with a deformed compensation part according to an embodiment;
• 4A a schematic cross-sectional view of an undeformed compensating part according to an embodiment;
• 4B a schematic cross-sectional view of a deformed compensating part according to an embodiment;
• 5 Figure 12 is an oblique top view illustration of a shim according to one embodiment;
• 6 a schematic cross-sectional view of a transmission shaft assembly according to an embodiment; and
• 7 an embodiment of a method for manufacturing a transmission assembly.

In the following description of preferred exemplary embodiments of the present invention, the same or similar reference symbols are used for the elements which are shown in the various figures and have a similar effect, with a repeated description of these elements being dispensed with.

1 shows a schematic cross-sectional view of a drive 100 for an industrial truck 102 according to an embodiment. In this exemplary embodiment, the drive 100 comprises an electric machine 105 with a drive shaft 107 and a transmission 110. The electric machine 105 is fixed on a frame plate 115 purely by way of example. In this exemplary embodiment, the transmission 110 is fastened with the aid of a rotary connection 120 so as to be pivotable about an axis 125 of the electric machine 105 . The transmission 110 comprises, merely by way of example, a housing cover 130 and a housing 135 firmly screwed to the housing cover 130 , which in this embodiment comprises a spur gear stage 140 , a bevel gear stage 145 and an output shaft 150 . In this case, the bevel gear stage 145 includes a gear shaft assembly 160 , a gear wheel 162 of the drive shaft 107 meshing with a spur gear 165 of the gear shaft assembly 160 . By way of example only, the gear shaft assembly 160 includes a gear shaft 170 in the form of a bevel gear shaft, which is supported by a bearing 172 and a further bearing 175 . In this exemplary embodiment, both bearings 172, 175 are designed as tapered roller bearings, with a toothing 177 of the gear shaft 170, which is designed here as a bevel gear toothing, in the figure shown here outside, here on the output side below both bearings 172, 175, but the spur gear 165 between two bearings 172, 175 on the bevel gear shaft. In this exemplary embodiment, the transmission 110 is designed to transmit the drive power from the electric machine 105 to a vehicle wheel, which can be fastened to the output shaft 150 , when the electric machine 105 is operating as a motor. When the vehicle decelerates, drive 100 is designed to allow electric machine 105 to operate in generator mode and to transmit the braking power from the vehicle wheel to transmission 110 and from there to electric machine 105 .

According to an alternative exemplary embodiment, the drive shaft 107 and the spur gear 165 of the transmission shaft assembly 160 are not coupled to one another directly, but via at least one further transmission element. Correspondingly, the output shaft 150 and the bevel gear stage 145 can alternatively be coupled to one another via at least one further transmission element.

2 16 is a schematic cross-sectional view of a transmission shaft assembly 160 according to an embodiment. The gear shaft assembly 160 shown here corresponds or is similar to the gear shaft assembly described in the previous figure. The transmission shaft assembly 160 is designed as a bevel gear shaft assembly in this exemplary embodiment and includes a transmission shaft 170 which, in this exemplary embodiment, is formed as a bevel gear shaft with a conical toothing 177 . For example, the teeth 177 are attached to an output-side end of the transmission shaft 170 arranges. As an alternative to the toothing 177, a bevel gear can be attached to the bevel gear shaft in a rotationally fixed manner. In addition, the transmission shaft assembly 160 has a bearing 172, which can also be referred to as a tapered roller bearing, a spur gear 165 and an annular, plastically deformable compensating part 200. In this exemplary embodiment, the compensating part 200 encloses the transmission shaft 170 and is on it between an inner ring 205 of the bearing 172 and the spur gear 165 arranged. According to one exemplary embodiment, the compensating part 200 is supported on the inner ring 205 . A cavity 208 is formed between the transmission shaft 170 and an outer side 207 of the compensating part, merely by way of example. Thus, the compensating part 200 is designed as a hollow body. The outer side 207 curves away from the transmission shaft 170, so that the compensating part 200 encloses the cavity 208 in an approximately semicircular or tire-shaped manner. In this exemplary embodiment, the transmission shaft assembly 160 optionally includes a disk 210 and a securing element 215 for securing the spur gear 165, with the securing element 215 being formed as a snap ring merely by way of example.

The transmission shaft 170 and the spur gear 165 are connected to one another in a torque-proof manner. The bearing 172, the plastically deformable compensating part 200, the spur gear 165 and the disc 210 can be displaced axially on the bevel gear shaft in the illustration shown here within the scope of an axial play 220, since the compensating part 200 is still undeformed without the action of radial forces, i.e. in an undeformed state , is shown. The components of the transmission shaft assembly 160 are secured axially with the snap ring and can be braced against the latter with the aid of the plastically deformable compensation part 200 . The axial play 220 causes a gap between the components arranged to be axially displaceable on the bevel gear shaft, here for example between the compensating part 200 and the spur gear 165.

According to one embodiment, the securing element 215 is between the spur gear 165 and the in 1 shown further camp arranged. The arrangement of the compensating part 200 between the spur gear 165 and the bearing 172 is only chosen as an example. According to an alternative exemplary embodiment, the compensating part 200 is arranged, for example, between the spur gear 165 and the disk 210 or between other components which are arranged such that they can be displaced axially on the bevel gear shaft.

3 16 shows a schematic cross-sectional representation of a transmission shaft assembly 160 with a deformed compensation part 200 according to an exemplary embodiment. The transmission shaft assembly 160 shown here corresponds or is similar to the transmission shaft assembly described in the previous figures, with the difference that the ring-shaped compensation part 200 arranged on the transmission shaft 170 is deformed, i.e. in a 2 undeformed state shown is in a deformed state. The outer side 207 of the compensating part 200 is merely an example in comparison to that in the previous one 2 shown curvature flattened formed. As a result, the compensating part 200 is lengthened along the transmission shaft 170, that is to say from the inner ring 205 to the spur gear 165. In other words, the compensating part 200 in this exemplary embodiment is plastically deformed after the action of a force F, which is radially oriented merely by way of example and acts on the compensating part 200 . As a result, that is in the previous 2 described axial play along the transmission shaft 170 is prevented and neither the spur gear 165 nor the disc 210 can be displaced.

According to one exemplary embodiment, force F is applied to at least two opposite wall sections of the compensating part 200 at the same time.

The plastic deformation of the compensating part 200 increases the height of the compensating part 200, as a result of which the axial play of the components arranged between the securing element 215 and the bearing 172 that existed before the deformation is eliminated.

4A 12 shows a schematic cross-sectional illustration of an undeformed compensation part 200 according to an exemplary embodiment. The compensating part 200 shown here corresponds or is similar to that in the previous ones 2 and 3 described compensation part. The compensating part 200 is shown undeformed, ie before a force is applied. The non-deformed compensating part 200 has, merely by way of example, an outer diameter d which, in this exemplary embodiment, is approximately twice the height h of the non-deformed compensating part 200. In this exemplary embodiment, the non-deformed compensating part 200 is formed with a curved outer side 207, the Outer side 207 merely bulges away, for example, from an opening 400 for receiving a transmission shaft as described in the previous figures. Accordingly, the height h in this exemplary embodiment results from a length of the outer side 207 of the compensating part and the degree of curvature of this outer side 207.

According to one exemplary embodiment, the non-deformed compensating part 200 has an annular shape enclosing the circular opening 400 Top, an annular base enclosing the circular opening 400 and a peripheral side wall connecting the top and the bottom on the outside 207. The ceiling, the floor and the peripheral side wall enclose the cavity 208. According to one exemplary embodiment, the ceiling and the floor have a planar surface at least on a side facing away from the cavity 208. According to one exemplary embodiment, the ceiling and the floor are aligned opposite one another and parallel to one another. The outer wall is designed with an outward bulge.

According to one embodiment, the outer wall has a lower rigidity than the ceiling and the floor, so that only the outer wall and not the ceiling and the floor are deformed by the action of the force. For example, the outer wall has a smaller wall thickness or a different material than the ceiling and the floor.

4B shows a schematic cross-sectional representation of the in 4A Compensating part 200 shown, but in a deformed state according to one embodiment. In the representation shown here, the compensating part 200 is shown after the action of radial forces and correspondingly plastically deformed. By the action of force is in the previous 4A outer side 207, described as curved, is pressed in this exemplary embodiment in the direction of opening 400 and is thus flattened. Accordingly, the deformed compensating part 200 has, merely by way of example, an outer diameter d' which is smaller than the outside diameter d of the undeformed compensating part 200. At the same time, the deformed compensating part 200 has a height h' which is greater than the height h of the undeformed compensating part 200. The difference between h` and h corresponds to that in the previous one 2 described axial play.

According to an exemplary embodiment, a shape of the top and bottom of the compensation part 200 has not changed as a result of the deformation. However, a distance between the ceiling and the floor has increased by the deformation. According to one embodiment, only the outer wall connecting the ceiling and the floor was deformed by the deformation, according to one embodiment stretched.

5 FIG. 12 shows an oblique plan view illustration of a compensating part 200 according to an exemplary embodiment in the non-deformed state. The compensating part 200 shown here corresponds or is similar to that in the previous ones 2 , 3 and 4 described compensation part, with the difference that it has a plurality of notches 500. In this exemplary embodiment, the notches 500 are formed, for example, as a total of eight slots, which are arranged in a radial arrangement and at a uniform distance from one another along the outer side 207 of the compensating part 200 . The notches 500 influence the rigidity and load-bearing capacity of the compensating part 200.

According to one exemplary embodiment, the notches 500 are designed as slots running through the peripheral outer wall of the compensating part 200 . According to one exemplary embodiment, a direction in which the notches 500 extend longitudinally is aligned orthogonally to the top and the bottom of the compensating part 200 . According to one exemplary embodiment, the indentations 500 extend somewhat into the top and bottom of the compensation part 200 . For example, the indentations 500 extend into the top and bottom from the outside 207 to a third or a half of a width of the top and bottom. The peripheral outer wall is divided into a plurality of deformation segments by the indentations 500 . For example, a force is exerted on each of the deformation segments in order to deform the compensating part 200 .

6 16 is a schematic cross-sectional view of a transmission shaft assembly 160 according to an embodiment. The transmission shaft assembly 160 shown here is the same as or similar to that in the previous ones 1 , 2 and 3 described transmission shaft assembly. In this exemplary embodiment, the securing element 215 is in the form of a snap ring with a round cross section, which is merely exemplary. The snap ring is received in a circumferential groove of the transmission shaft 170 . In the representation shown here, the compensating part 200 is deformed. The disk 210 is displaced in the direction of the securing element 215 as a result of the deformation of the compensating part 200 . As a result, the securing element 215 is secured by the washer 210 according to an exemplary embodiment. For example, the disk 210 has a groove 600 on a side facing the securing element. Due to the displacement caused by the deformation of the compensating part 200, the disk 210 equipped with the open groove 600 protrudes beyond the snap ring in such a way that the latter cannot jump out of its position.

7 FIG. 7 shows an exemplary embodiment of a method 700 for producing a transmission assembly as described in the previous figures. The method 700 includes a step 705 of providing the transmission shaft, the spur gear and the compensating part, and a step 710 of arranging the out same part and the spur gear on the gear shaft. This is followed by a step 715 of plastically deforming the shim to compensate for axial play within the transmission shaft assembly. In this exemplary embodiment, step 715 of plastic deformation is carried out by way of example only under the action of a radial force, as a result of which the compensating part is deformed along a longitudinal axis of the transmission shaft. For example, the force is applied using pliers.

Reference List

100

drive

102

industrial truck

105

electric machine

107

drive shaft

110

transmission

115

frame plate

120

Slewing Ring

125

Axis of the electric machine

130

housing cover

135

Housing

150

output shaft

160

transmission shaft assembly

162

gear

165

spur gear

170

gear shaft

172

camp

175

another camp

177

gearing

200

compensating part

205

inner ring of the bearing

207

outside of the balancer

208

cavity

210

disc

215

fuse element

220

axial play

400

opening

500

notch

600

groove

700

Method of manufacturing a gear assembly

705

step of providing

710

arranging step

715

Plastic deformation step

800

contraption

805

delivery unit

810

arrangement unit

815

deformation unit

f

Power

i.e

Diameter of undeformed compensation part

d`

Diameter of the deformed compensation part

H

Height of undeformed compensation part

h`

Height of the deformed compensation part

Claims (12)

Transmission shaft assembly (160) for a drive (100) for an industrial truck (102), the transmission shaft assembly (160) having the following features: a transmission shaft (170) for transmitting a drive power of the drive (100); a spur gear (165) non-rotatably connected to the transmission shaft (170); and an annular compensating part (200) which is arranged on the transmission shaft (170), the compensating part (200) being plastically deformable under the action of a force (F) or being plastically deformed in order to have an axial play (220) within the transmission shaft assembly ( 160) characterized in that the compensating part (200) between the spur gear (165) and an inner ring (205) of a bearing (172) for supporting the transmission shaft (170) is arranged in a rotationally fixed manner on the transmission shaft (170). Transmission shaft assembly (160) according to claim 1 , wherein the transmission shaft (170) is formed as a bevel gear shaft with teeth. Transmission shaft assembly according to any one of the preceding claims, wherein the balancer (200) is formed as a hollow body. Transmission shaft assembly according to one of the preceding claims, wherein the outer side (207) of the compensating part (200) is arched in an undeformed state of the compensating part (200) and flattened in a deformed state after the force (F) has been applied. A transmission shaft assembly (160) as claimed in any preceding claim including a further bearing (175) for supporting the transmission shaft (170), the further bearing (175) being located on a drive side of the transmission shaft assembly (160). Transmission shaft assembly (160) according to any one of the preceding claims, with a securing element (215) for securing the spur gear (165). Transmission shaft assembly (160) according to claim 6 , wherein the securing element (215) is formed as a snap ring. A transmission shaft assembly (160) as claimed in any preceding claim, wherein the shim (200) includes at least one indentation (500). Drive (100) for an industrial truck (102) with a transmission shaft assembly (160) according to one of the preceding ones Claims 1 until 8th , wherein the drive (100) has an electric machine (105) with a drive shaft (107), wherein a gear (162) of the drive shaft (107) meshes with the spur gear (165) of the gear shaft assembly (160) or via at least one further gear element is coupled. Drive (100) according to claim 9 , With an output shaft (150) which is coupled to the transmission shaft (170) of the transmission shaft assembly (160) directly or via at least one further transmission element. Method (700) for manufacturing a transmission assembly according to any one of the preceding Claims 1 until 8th , wherein the method (700) has the following steps (705, 710, 715): providing (705) the transmission shaft (170), the spur gear (165) and the compensating part (200); arranging (710) the compensation part (200) and the spur gear (165) on the transmission shaft (170); and plastically deforming (715) the shim (200) to take up endplay (220) within the transmission shaft assembly (160). Method (700) according to claim 11 , wherein in the step (715) of plastic deformation, the compensating part (200) is deformed under the action of a radial force (F) along a longitudinal axis of the transmission shaft (170).

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