CN219509999U

CN219509999U - Large-expansion transmission shaft

Info

Publication number: CN219509999U
Application number: CN202223330540.5U
Authority: CN
Inventors: 任耿鑫; 赵建国; 李永勃; 王吉龙
Original assignee: Xuzhou Heavy Machinery Co Ltd
Current assignee: Xuzhou Heavy Machinery Co Ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-08-11
Anticipated expiration: 2032-12-13

Abstract

The utility model relates to the technical field of engineering vehicles, and discloses a large-expansion transmission shaft which comprises a shaft tube, spline shaft forks and spline hubs matched with the spline shaft forks, wherein 2 pairs of spline shaft forks and spline hubs are respectively arranged at two ends of the shaft tube, are structurally and symmetrically arranged, and the spline hubs and the spline shaft forks at one end are meshed through gears to transmit torque transmitted by the spline shaft forks to the spline shaft forks at the other end through the shaft tube. The beneficial effects of the utility model are as follows: the axial expansion and contraction amount of the transmission shaft can be increased.

Description

Large-expansion transmission shaft

Technical Field

The utility model relates to the technical field of engineering vehicles, in particular to a transmission shaft with large expansion and contraction amount.

Background

The engine of the engineering vehicle not only provides enough power for running, but also provides various powers for parking operation, such as various lifting vehicles, fire-fighting vehicles, concrete mixer trucks, field operation power generation vehicles, medical vehicles and the like, and the engine is connected with a transmission shaft to output power to drive a hydraulic oil pump, a water pump and a power generator to work.

When the product is designed, the engineering vehicles with the same specification are often matched with engines or gearboxes with different types, or the positions of the power take-off ports are changed along with the difference of the wheelbases of the universal chassis, and even if the positions of the power take-off ports are slightly changed, the engineering vehicles with the same specification are required to be frequently matched with transmission shafts with different lengths, so that certain inconvenience is brought to maintenance, assembly and repair and maintenance of product information.

At present, as shown in fig. 1, after the output end of the transmission is assembled with a flange yoke 1, torque is transmitted to the other side of a transmission shaft sequentially through a universal joint assembly 2, a spline shaft yoke 3, a spline hub 4 and a shaft tube 5, one end of the shaft tube 5 is connected with the spline hub 4, the other end of the shaft tube 5 is connected with a universal joint yoke 13, and the transmission shaft adjusts the expansion and contraction amount through the contact length of the spline shaft yoke 3 and the spline hub 4; the sheath oil seal assembly 11 is arranged on the outer side of the spline hub 4, the oil nozzle 12 is arranged on the sheath oil seal assembly 11, and the arrangement of the sheath oil seal assembly 11 can regularly maintain the spline shaft yoke 3 and the spline hub 4.

However, a single spline shaft fork cannot be processed too long on the premise of ensuring the processing precision, and has no axial positioning mechanism and limited telescopic adjustment quantity; if the stretching amount is too long, the spline strength is insufficient, and even pull-off is caused.

And because the actual working length of the transmission shaft depends on the welding size of the oil pump bracket and the gearbox bracket, if the oil pump bracket and the gearbox bracket are welded or assembled with deviation, when the transmission shaft with small expansion amount is used (the expansion amount is usually within +/-30 mm), the transmission shaft has the risk of bearing certain axial force in the working process, thus accelerating dry grinding between the rolling pin and the cross shaft of the universal joint assembly, further causing ablation or flange fork fracture of the universal joint, causing shutdown failure of a vehicle, and greatly reducing the service life of the transmission shaft.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a transmission shaft with large expansion and contraction amount, which can increase the axial expansion and contraction amount of the transmission shaft.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a large-scale transmission shaft, includes central siphon, spline shaft fork and matches the spline hub that sets up with the spline shaft fork, spline shaft fork and spline hub have 2 pairs, set up in the both ends of central siphon respectively, structural symmetry sets up, and the spline hub of one end passes through the gear engagement with the spline shaft fork and passes through the moment of torsion of central siphon transmission to the spline shaft fork of other one end, realizes the bidirectional transfer of moment of torsion. The spline shaft fork and the spline hub are symmetrically arranged at two ends of the transmission shaft, so that the telescopic adjusting range of the transmission shaft is wider, and the dynamic balance is better.

It should be noted that: in the utility model, the spline shaft yoke and the spline hub are arranged in 2 pairs, which are symmetrical in structure, but the sizes of the spline shaft yoke and the spline hub in 2 pairs can be consistent or inconsistent.

Further, the transmission shaft of the utility model further comprises a flange fork and a universal joint assembly, wherein the flange fork is connected with one end of the universal joint assembly, and the other end of the universal joint assembly is connected with the fork head end of the spline shaft fork.

Further, the shaft end of the spline shaft fork is provided with a shaft fork baffle, the length or the diameter of the shaft fork baffle is larger than the diameter of the shaft part of the spline shaft fork, and the spline shaft fork can be placed in the arrangement of the shaft fork baffle to be pulled out.

Further, the bearing retainer ring is arranged in the universal joint assembly, the axial movement of the universal joint assembly and the spline shaft fork can be avoided through the arrangement of the bearing retainer ring, and the ablation risk of the universal joint assembly is reduced.

Furthermore, the transmission shaft further comprises a spline sheath, one end of the spline sheath is connected with the spline hub end of the shaft tube or the near shaft tube through the clamp, the other end of the spline sheath is connected with the fork head part of the spline shaft fork through the clamp welding sleeve, dust can be prevented from entering the shaft part of the spline shaft fork through the arrangement of the spline sheath, and the spline sheath is wide in dustproof area and good in dustproof effect.

Further, a sheath oil seal assembly is further arranged between the spline sheath and the spline hub and used for regularly maintaining the spline shaft yoke and the spline hub.

Compared with the prior art, the utility model provides the transmission shaft with large expansion amount, which has the following beneficial effects:

(1) According to the large-expansion-amount transmission shaft, under the condition that the radial size and the installation mode of the original structure are not changed, the spline shaft fork and the spline hub are symmetrically arranged, so that the axial expansion amount of the transmission shaft can be increased, the structure is compact, the product replaceability and the universality are greatly improved, the expansion amount adjustment range is large, the risk that the transmission shaft bears axial force is avoided, the failure risk of the transmission shaft is greatly reduced, and the reliability of the product is improved.

(2) The large-expansion transmission shaft disclosed by the utility model has the advantages that the expansion amount can be more than +/-30 mm, so that the adjustment range of the transmission shaft is wide, the type selection type of the transmission shaft can be greatly reduced, the product standardization requirement is met to the greatest extent, and the maintenance cost is reduced.

(3) According to the large-expansion transmission shaft, the spline shaft fork can be effectively prevented from falling off in the assembly or use process through the arrangement of the shaft fork baffle plate.

Drawings

FIG. 1 is a schematic view of a prior art propeller shaft;

fig. 2 is a schematic structural view of a transmission shaft according to the present utility model.

The meaning of the reference numerals in the figures is:

1-a flange yoke; 2-universal joint assembly; 3-spline shaft yoke; a 4-spline hub; 5-shaft tube; 6-a shaft fork baffle; 7-clamping; 8-spline sheath; 9-clamping and welding the sleeve; 10-a bearing retainer ring; 11-a sheath oil seal assembly; 12-oil nozzle; 13-universal joint fork.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may also include different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present utility model.

As shown in fig. 2, the transmission shaft comprises a shaft tube 5, a spline shaft fork 3 and a spline hub 4 matched with the spline shaft fork 3, wherein 2 pairs of spline shaft fork 3 and spline hub 4 are respectively arranged at two ends of the shaft tube 5, are structurally and symmetrically arranged, and the spline hub 4 and the spline shaft fork 3 at one end are meshed through gears to transmit torque transmitted by the spline shaft fork 3 to the spline shaft fork 3 at the other end through the shaft tube 5, so that bidirectional transmission of the torque is realized. The spline shaft fork 3 and the spline hub 4 are symmetrically arranged at two ends of the transmission shaft, so that the telescopic adjustment range of the transmission shaft is wider, and the dynamic balance is better.

It should be noted that: in the utility model, the spline shaft yoke 3 and the spline hub 4 are arranged in 2 pairs and are symmetrical in structure, but the sizes of the spline shaft yoke 3 and the spline hub 4 in 2 pairs can be consistent or inconsistent. For example, when the mounting positions are different or when one side of the transmission shaft is closer to the heat source, the spline shaft yoke and the spline hub on the heat source side can be made shorter in size so as to enable the shaft tube to be positioned nearby the heat source in order to avoid the acceleration failure of the spline sheath.

In a specific implementation of this embodiment, the transmission shaft of the present utility model further includes a flange yoke 1 and a universal joint assembly 2, where the flange yoke 1 is connected to one end of the universal joint assembly 2, and the other end of the universal joint assembly 2 is connected to a fork end of the spline shaft yoke 3.

In a specific implementation manner of this embodiment, the shaft end of the spline shaft yoke 3 is provided with a shaft yoke baffle 6, and the length or the diameter of the shaft yoke baffle 6 is greater than the shaft diameter of the spline shaft yoke 3, and the spline shaft yoke 3 can be pulled off by the arrangement of the shaft yoke baffle 6.

In a specific implementation manner of this embodiment, the bearing retainer ring 10 is disposed in the universal joint assembly 2, and the arrangement of the bearing retainer ring 10 can avoid the axial play of the universal joint assembly 2 and the spline shaft yoke 3, so as to reduce the ablation risk of the universal joint assembly.

In a specific implementation manner of the embodiment, the transmission shaft further comprises a spline sheath 8, one end of the spline sheath 8 is connected with the end of the spline hub 4 of the shaft tube 5 or the near-shaft tube 5 through a clamp 7, the other end of the spline sheath 8 is connected with the fork head of the spline shaft fork 3 through a clamp welding sleeve 9, dust can be prevented from entering the shaft part of the spline shaft fork 3 through the arrangement of the spline sheath 8, and the spline sheath 8 has a wide dustproof area and a good dustproof effect.

In a specific implementation of this embodiment, a sheath oil seal assembly (not shown in fig. 2) is further disposed between the spline sheath 8 and the spline hub 4, and the sheath oil seal assembly is used for performing periodic maintenance on the spline shaft yoke 3 and the spline hub 4.

According to the large-expansion-amount transmission shaft, under the condition that the radial size and the installation mode of the original structure are not changed, the spline shaft fork 3 and the spline hub 4 are symmetrically arranged, so that the axial expansion amount of the transmission shaft can be increased, the structure is compact, the product replaceability and the universality are greatly improved, the expansion amount adjustment range is large, the risk that the transmission shaft bears axial force is avoided, the failure risk of the transmission shaft is greatly reduced, and the reliability of the product is improved.

It is noted that in the present utility model, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A large-expansion transmission shaft, which is characterized in that: the spline shaft fork comprises a shaft tube, spline shaft forks and spline hubs matched with the spline shaft forks, wherein 2 pairs of spline shaft forks and spline hubs are arranged at two ends of the shaft tube respectively, the spline hubs and the spline shaft forks at one end are symmetrically arranged structurally, and torque transmitted by the spline shaft forks is transmitted to the spline shaft forks at the other end through the shaft tube in a gear meshing mode.

2. A high-expansion drive shaft according to claim 1, wherein: the universal joint assembly comprises a spline shaft fork, and is characterized by further comprising a flange fork and a universal joint assembly, wherein the flange fork is connected with one end of the universal joint assembly, and the other end of the universal joint assembly is connected with the fork head end of the spline shaft fork.

3. A high-expansion drive shaft according to claim 1 or 2, characterized in that: the shaft end of the spline shaft fork is provided with a shaft fork baffle, and the length or the diameter of the shaft fork baffle is larger than the diameter of the shaft part of the spline shaft fork.

4. A high-expansion drive shaft according to claim 2, wherein: and a bearing retainer ring is arranged in the universal joint assembly.

5. A high-expansion drive shaft according to claim 1 or 2, characterized in that: the novel spline shaft fork comprises a shaft tube, and is characterized by further comprising a spline sheath, wherein one end of the spline sheath is connected with the spline hub end of the shaft tube or the near shaft tube through a clamp, and the other end of the spline sheath is connected with the fork head of the spline shaft fork through a clamp welding sleeve.

6. A high-expansion drive shaft according to claim 5, wherein: a sheath oil seal assembly is further arranged between the spline sheath and the spline hub and used for regularly maintaining the spline shaft fork and the spline hub.