CN220791953U - Periodically tensioning belt transmission mechanism, transmission device and helicopter - Google Patents
Periodically tensioning belt transmission mechanism, transmission device and helicopter Download PDFInfo
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- CN220791953U CN220791953U CN202322764042.XU CN202322764042U CN220791953U CN 220791953 U CN220791953 U CN 220791953U CN 202322764042 U CN202322764042 U CN 202322764042U CN 220791953 U CN220791953 U CN 220791953U
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Abstract
The utility model discloses a periodic tensioning belt transmission mechanism, a transmission device and a helicopter, and relates to the technical field of aircraft transmission systems. The periodic tensioning belt drive comprises: the device comprises a transmission assembly, a frame and a connecting rod rocker arm tensioning mechanism; the transmission assembly comprises a first belt pulley, a second belt pulley and a belt, wherein the first belt pulley and the second belt pulley are arranged on the frame, and the first belt pulley is connected with the second belt pulley through the belt; the connecting rod rocker arm tensioning mechanism comprises a distance changing assembly, a rocker arm assembly and a tensioning wheel; one end of the rocker arm assembly is connected with the tensioning wheel, the other end of the rocker arm assembly is connected with the distance changing assembly, the distance changing assembly is installed on the frame, and the tensioning wheel is abutted to one side of the belt. The utility model can provide the regular tensioning belt transmission mechanism which has a simple structure, does not depend on external tensioning equipment, and is easy to use and maintain.
Description
Technical Field
The utility model relates to the technical field of aircraft transmission systems, in particular to a periodically-tensioned belt transmission mechanism, a transmission device and a helicopter.
Background
At present, a large number of light helicopters adopt piston engines, and due to the characteristic that the distance between an output axis of the engine and an input axis of a speed reducer is large, a belt transmission device becomes an indispensable important component part in a transmission system of the helicopter. After a period of operation, the belt drive is lost due to plastic deformation and wear of the belt, and in order to ensure proper operation of the belt drive, a tensioner is typically used to adjust the belt's operating condition.
The main belt tensioning mode in the prior art is to tension by adopting the thrust generated by the electric push rod. The prior art has the following defects:
1. the external tensioning equipment is needed, the cross-linking with the external part structure is complex, the cost is high, and the weight is heavy;
2. during belt drive operation, it is desirable to continuously provide assistance to maintain tension;
3. the force feedback device is needed to control the tension force, so that the failure rate is high.
Therefore, how to provide a periodic tensioning belt transmission mechanism which is simple in structure, independent of external tensioning equipment, easy to use and maintain is a technical problem to be solved.
Disclosure of Invention
In order to solve at least one of the problems mentioned in the background art, the utility model provides a periodic tensioning belt transmission mechanism, a transmission device and a helicopter, which can provide the periodic tensioning belt transmission mechanism which is simple in structure, independent of external tensioning equipment, easy to use and maintain.
The specific technical scheme provided by the embodiment of the utility model is as follows:
in a first aspect, there is provided a periodically tensioned belt drive comprising:
the device comprises a transmission assembly, a frame and a connecting rod rocker arm tensioning mechanism;
the transmission assembly comprises a first belt pulley, a second belt pulley and a belt, wherein the first belt pulley and the second belt pulley are arranged on the frame, and the first belt pulley is connected with the second belt pulley through the belt;
the connecting rod rocker arm tensioning mechanism comprises a distance changing assembly, a rocker arm assembly and a tensioning wheel;
one end of the rocker arm assembly is connected with the tensioning wheel, the other end of the rocker arm assembly is connected with the distance changing assembly, the distance changing assembly is installed on the frame, and the tensioning wheel is abutted to one side of the belt.
Further, the variable-pitch assembly comprises a variable-pitch pull rod, a first bearing and a second bearing;
the two ends of the variable-pitch pull rod are respectively connected with the first bearing and the second bearing;
the first bearing is arranged on the frame, and the second bearing is connected with the rocker arm assembly;
the distance-changing pull rod is used for adjusting the distance between the first bearing and the second bearing so as to adjust the tensioning degree of the tensioning wheel on the belt.
Further, the variable-pitch pull rod is in threaded connection with the first bearing through left-handed threads;
the variable-pitch pull rod is connected with the second bearing through right-handed threads.
Further, the variable-pitch pull rod is in threaded connection with the first bearing through a right-handed thread;
the variable-pitch pull rod is in threaded connection with the second bearing through left-handed threads.
Further, the variable-pitch assembly further comprises a first nut and a second nut;
the variable-pitch pull rod is in threaded connection with the first nut at the side close to the first bearing;
the variable-pitch pull rod is in threaded connection with the second nut at the side close to the second bearing.
Further, the rocker arm assembly comprises a rocker arm body and a rotating shaft;
one end of the rocker arm body is connected with the tensioning wheel, and the other end of the rocker arm body is connected with the distance changing assembly;
the rocker arm body is movably hinged with the rotating shaft, and the rocker arm body is installed on the frame through the rotating shaft.
Further, the first pulley comprises a first transmission shaft, and the second pulley comprises a second transmission shaft;
the first belt pulley is arranged on the frame through the first transmission shaft;
the second belt wheel is arranged on the frame through the second transmission shaft.
Further, the first belt pulley further comprises a connecting flange, and the connecting flange is connected with the first transmission shaft.
In a second aspect, there is provided a transmission comprising the above-described periodically tensioned belt drive.
In a third aspect, a helicopter is provided, comprising an engine, a gearbox and the above transmission, wherein the transmission is respectively connected with the engine and the gearbox.
The embodiment of the utility model has the following beneficial effects:
according to the regular tensioning belt transmission mechanism, the transmission device and the helicopter, which are provided by the embodiment of the utility model, the tensioning wheel can be driven to tension the belt through the connecting rod rocker arm tensioning mechanism, external tensioning equipment is not needed, the structure is simple, the weight is light, the cost can be reduced, the length of the distance-changing component can be adjusted, namely the length from the frame to one end of the rocker arm component is adjusted, so that the rocker arm component drives the tensioning wheel to increase or reduce the tensioning force on the belt, different belt tensioning scenes can be flexibly dealt with, the usability and the maintainability of the whole mechanism are improved, and the use experience of a user is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic plan view of a periodic tensioning belt drive provided in accordance with an embodiment of the present utility model;
FIG. 2 illustrates a schematic perspective view of a periodic tensioning belt drive in accordance with one embodiment of the present utility model;
FIG. 3 illustrates a schematic diagram of a perspective view of a periodic tensioning belt drive in accordance with one embodiment of the utility model;
reference numerals: 1. a transmission assembly; 11. a first pulley; 111. a first drive shaft; 112. a connecting flange; 12. a second pulley; 121. a second drive shaft; 13. a belt; 2. a frame; 3. a connecting rod rocker arm tensioning mechanism; 31. a pitch varying assembly; 311. a variable-pitch pull rod; 312. a first bearing; 313. a second bearing; 314. a first nut; 315. a second nut; 32. a rocker arm assembly; 321. a rocker arm body; 322. a rotating shaft; 33. tensioning wheel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments of the present utility model. 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.
It should be understood that throughout this specification and the claims, unless the context clearly requires otherwise, the words "comprise", "comprising", and the like, are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
It should also be appreciated that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
Example 1
The present utility model provides a periodically tensioned belt drive, referring to FIG. 1, comprising: the transmission assembly 1, the frame 2 and the connecting rod rocker arm tensioning mechanism 3.
The transmission assembly 1 comprises a first belt pulley 11, a second belt pulley 12 and a belt 13, wherein the first belt pulley 11 and the second belt pulley 12 are mounted on the frame 2, and the first belt pulley 11 and the second belt pulley 12 are connected through the belt 13. Referring to fig. 2, the link rocker tensioning mechanism 3 includes a pitch change assembly 31, a rocker assembly 32, and a tensioning wheel 33. One end of the rocker arm assembly 32 is connected with the tensioning wheel 33, the other end of the rocker arm assembly 32 is connected with the distance changing assembly 31, the distance changing assembly 31 is mounted on the frame 2, and the tensioning wheel 33 is abutted with one side of the belt 13.
Specifically, the first pulley 11 and the second pulley 12 are mounted on the frame 2, and the first pulley 11 and the second pulley 12 are connected by the belt 13, so that the center distance of the belt 13 is fixed. One end of the rocker arm assembly 32 in the link rocker arm tensioning mechanism 3 is connected to the tensioning wheel 33, and the belt 13 can be tensioned by the tensioning wheel 33, so that the belt 13 can be tensioned on the outer side, and similarly, the belt 13 can be tensioned on the inner side. Hereinafter, the outer side of the belt 13 is tensioned as an example, and the principle of the inner side of the belt 13 is the same, so that the description thereof will be omitted. The other end of the rocker arm assembly 32 is connected with the pitch changing assembly 31, and the length of the pitch changing assembly 31 can be adjusted through the pitch changing assembly 31, namely, the length from the frame 2 to one end of the rocker arm assembly 32 is adjusted, so that the rocker arm assembly 32 drives the tensioning wheel 33 to increase or decrease the tensioning force on the belt 13, and the tensioning scene of the belt 13 of different types can be flexibly dealt with. Through adopting such structural style, can drive take-up pulley 33 through connecting rod rocking arm straining device 3 and carry out tensioning to belt 13, do not need outside tensioning equipment, simple structure light in weight can reduce cost, still can be through the length of adjustment displacement subassembly 31, adjust the length of frame 2 to rocking arm subassembly 32 one end promptly, thereby make rocking arm subassembly 32 drive take-up pulley 33 increase or reduce the tensioning force to belt 13, can in a flexible way deal with the belt 13 tensioning scene of different kinds, promote whole mechanism's ease of use and easy maintainability, and then promote user's use experience.
In some embodiments, referring to fig. 3, pitch assembly 31 includes a pitch link 311, a first bearing 312, and a second bearing 313. The two ends of the variable-pitch pull rod 311 are respectively connected with a first bearing 312 and a second bearing 313; the first bearing 312 is mounted on the frame 2, and the second bearing 313 is connected with the rocker arm assembly 32; the variable-pitch tension rod 311 is used to adjust the distance between the first bearing 312 and the second bearing 313 to adjust the degree of tension of the tension pulley 33 with respect to the belt 13.
Specifically, the two ends of the variable-pitch pull rod 311 are respectively connected with the first bearing 312 and the second bearing 313, and the distance between the first bearing 312 and the second bearing 313 is adjusted through the variable-pitch pull rod 311, namely, the length of the connection part of the variable-pitch pull rod 311 and the frame 2 and the connection part of the variable-pitch pull rod 311 and the rocker arm assembly 32 is adjusted, so that the rocker arm assembly 32 drives the tension wheel 33 to increase or decrease the tension force on the belt 13, and the tensioning scene of different types of belts 13 can be flexibly dealt with. Taking the tensioning wheel 33 tensioning the outer side of the belt 13 as an example, the rocker arm assembly 32 can be driven to press the tensioning wheel 33 more by adjusting the distance between the first bearing 312 and the second bearing 313 by adjusting the distance-changing pull rod 311, so that the tensioning force of the tensioning wheel 33 on the belt 13 is increased, and the tensioning effect is improved; by adjusting the distance between the first bearing 312 and the second bearing 313 by the distance-changing pull rod 311, the rocker arm assembly 32 can drive the tensioning wheel 33 to be far away from the belt 13, so that the tensioning force of the tensioning wheel 33 on the belt 13 is reduced, and the tensioning effect is reduced. Through adopting such structural style, can adjust the distance between first bearing 312 and the second bearing 313 through the displacement pull rod 311 to make rocking arm subassembly 32 drive take-up pulley 33 increase or reduce the tensioning force to belt 13, can deal with the belt 13 tensioning scene of different kinds in a flexible way, promote the easy usability and the easy maintainability of whole mechanism, and then promote user's use experience.
In some embodiments, the torque link 311 is threadably coupled to the first bearing 312 by left-hand threads. The variable-pitch link 311 is screwed with the second bearing 313 by right-hand threads.
In some embodiments, the torque link 311 is threadably coupled to the first bearing 312 by right-hand threads. The variable-pitch link 311 is screwed with the second bearing 313 by left-hand threads.
Specifically, the variable-pitch link 311 may be in the form of a left-handed screw screwed to the first bearing 312, while the variable-pitch link 311 is screwed to the second bearing 313 by a right-handed screw. Illustratively, when the variable-pitch pull rod 311 rotates anticlockwise, the variable-pitch pull rod 311 is screwed into the first bearing 312 and simultaneously is screwed into the second bearing 313, at this time, the distance between the first bearing 312 and the second bearing 313 is shortened, so that the rocker arm assembly 32 drives the tension pulley 33 to be far away from the belt 13, and further the tension force of the tension pulley 33 on the belt 13 is reduced, and the tensioning effect is reduced; when the variable-pitch pull rod 311 rotates clockwise, the variable-pitch pull rod 311 rotates out of the first bearing 312 and simultaneously rotates out of the second bearing 313, at this time, the distance between the first bearing 312 and the second bearing 313 is increased, and the rocker arm assembly 32 can be driven to press the tension wheel 33 more tightly, so that the tension force of the tension wheel 33 on the belt 13 is increased, and the tensioning effect is improved. Similarly, when the distance-changing pull rod 311 is in threaded connection with the first bearing 312 by adopting a right-handed thread, and meanwhile, the distance-changing pull rod 311 is in threaded connection with the second bearing 313 by adopting a left-handed thread, and when the distance-changing pull rod 311 rotates anticlockwise, the distance-changing pull rod 311 rotates out of the first bearing 312 and simultaneously rotates out of the second bearing 313, at this time, the distance between the first bearing 312 and the second bearing 313 is increased, and the rocker arm assembly 32 can be driven to press the tensioning wheel 33 more, so that the tensioning force of the tensioning wheel 33 on the belt 13 is increased, and the tensioning effect is improved; when the variable-pitch pull rod 311 rotates clockwise, the variable-pitch pull rod 311 is screwed into the first bearing 312 and is screwed into the second bearing 313, at this time, the distance between the first bearing 312 and the second bearing 313 is shortened, so that the rocker arm assembly 32 drives the tension pulley 33 to be far away from the belt 13, the tension force of the tension pulley 33 on the belt 13 is reduced, and the tensioning effect is reduced. Through adopting such structural style, only need dispose opposite threaded connection's form at first bearing 312, second bearing 313 both ends, can realize that variable-pitch pull rod 311 adjusts the distance between first bearing 312 and the second bearing 313 to make rocking arm subassembly 32 drive take-up pulley 33 increase or reduce the tensioning force to belt 13, can deal with different belt 13 tensioning scenes in a flexible way, promote the usability and the easy maintainability of integral mechanism, and then promote user's use experience.
In some embodiments, referring to fig. 3, pitch assembly 31 further comprises a first nut 314 and a second nut 315. The variable-pitch pull rod 311 is in threaded connection with a first nut 314 at the side close to the first bearing 312; the torque rod 311 is screwed to the second nut 315 on the side closer to the second bearing 313.
Specifically, the first nut 314 and the second nut 315 are loosened before the adjustment of the variable-pitch link 311. It should be noted that the first nut 314 and the second nut 315 are respectively configured in a threaded connection corresponding to the first bearing 312 and the second bearing 313. After the first nut 314 and the second nut 315 are loosened, the variable-pitch pulling rod 311 is rotated, and the variable-pitch pulling rod 311 is simultaneously screwed in or simultaneously unscrewed from the first bearing 312 and the second bearing 313; the variable-pitch tension rod 311 is adjusted to a proper position, and after the adjustment is finished, the first nut 314 and the second nut 315 are screwed down to prevent loosening. The setting of first nut 314, second nut 315 is convenient for fix the adjustment length of displacement pull rod 311, avoids influencing the length of displacement pull rod 311 because of the disturbance that other mechanisms produced during operation, can make the displacement pull rod 311 displacement more accurate and stable.
In some embodiments, referring to fig. 2, the rocker arm assembly 32 includes a rocker arm body 321 and a rotating shaft 322. One end of the rocker arm body 321 is connected with the tensioning wheel 33, and the other end of the rocker arm body 321 is connected with the pitch changing assembly 31; the rocker arm body 321 is movably hinged with the rotating shaft 322, and the rocker arm body 321 is arranged on the frame 2 through the rotating shaft 322.
Specifically, when the rocker arm assembly 32 is in operation, the rocker arm body 321 can rotate around the rotation shaft 322 to drive the tensioning wheel 33. The pivot 322 is used for spacing rocking arm body 321 on the one hand to make rocking arm body 321 install on frame 2, on the other hand can reduce the range of motion of rocking arm subassembly 32, promote overall structure's space utilization.
In some embodiments, the first pulley 11 includes a first drive shaft 111 and the second pulley 12 includes a second drive shaft 121. The first belt pulley 11 is mounted on the frame 2 through a first transmission shaft 111; the second pulley 12 is mounted to the frame 2 via a second drive shaft 121.
In some embodiments, the first pulley 11 further comprises a connecting flange 112, the connecting flange 112 being connected with the first drive shaft 111.
Illustratively, the first pulley 11 is typically a small pulley and the second pulley 12 is typically a large pulley. The small pulley has a smaller diameter than the large pulley, the second pulley 12 can be connected with the engine through the second transmission shaft 121, and the first pulley 11 can be connected with the reduction gearbox through the connecting flange 112 on the first transmission shaft 111. The connecting flange 112 may be provided in one or more, in particular configured correspondingly to the structural arrangement of the reduction gearbox.
In this embodiment, can drive take-up pulley through connecting rod rocking arm straining device and take-up pulley to the belt tensioning, do not need outside tensioning equipment, simple structure light in weight can reduce cost, still can be through the length of adjustment displacement subassembly, adjust the length of frame to rocking arm subassembly one end promptly to make rocking arm subassembly drive take-up pulley increase or reduce the tensioning force to the belt, can deal with the belt tensioning scene of different kinds in a flexible way, promote whole mechanism's usability and easy maintainability, and then promote user's use experience.
Example two
The utility model also provides a transmission device corresponding to the embodiment, and the transmission device comprises the regular tensioning belt transmission mechanism in the embodiment. The above embodiments of the periodic tensioning belt drive are described in detail and will not be described in detail herein.
Example III
Corresponding to the embodiment, the utility model also provides a helicopter, which comprises an engine, a reduction gearbox and the transmission device, wherein the transmission device is respectively connected with the engine and the reduction gearbox.
The transmission may comprise a periodically tensioned belt drive, by means of which a second pulley in the belt drive may be connected to the engine via a second drive shaft, and a first pulley may be connected to the gearbox via a connecting flange on the first drive shaft. The connecting flange can be provided in one or more, in particular configured correspondingly to the structural arrangement of the reduction gearbox.
While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A periodically tensioning belt drive comprising:
the device comprises a transmission assembly, a frame and a connecting rod rocker arm tensioning mechanism;
the transmission assembly comprises a first belt pulley, a second belt pulley and a belt, wherein the first belt pulley and the second belt pulley are arranged on the frame, and the first belt pulley is connected with the second belt pulley through the belt;
the connecting rod rocker arm tensioning mechanism comprises a distance changing assembly, a rocker arm assembly and a tensioning wheel;
one end of the rocker arm assembly is connected with the tensioning wheel, the other end of the rocker arm assembly is connected with the distance changing assembly, the distance changing assembly is installed on the frame, and the tensioning wheel is abutted to one side of the belt.
2. The periodic tensioning belt drive of claim 1, wherein the pitch assembly comprises a pitch link, a first bearing, and a second bearing;
the two ends of the variable-pitch pull rod are respectively connected with the first bearing and the second bearing;
the first bearing is arranged on the frame, and the second bearing is connected with the rocker arm assembly;
the distance-changing pull rod is used for adjusting the distance between the first bearing and the second bearing so as to adjust the tensioning degree of the tensioning wheel on the belt.
3. The periodic tightening belt drive of claim 2, wherein the variable-pitch tie rod is threadably connected to the first bearing by left-hand threads;
the variable-pitch pull rod is connected with the second bearing through right-handed threads.
4. The periodic tightening belt drive of claim 2, wherein the variable-pitch tie rod is threadably connected to the first bearing by right-hand threads;
the variable-pitch pull rod is in threaded connection with the second bearing through left-handed threads.
5. The periodic tensioning belt drive of claim 2, wherein the pitch assembly further comprises a first nut and a second nut;
the variable-pitch pull rod is in threaded connection with the first nut at the side close to the first bearing;
the variable-pitch pull rod is in threaded connection with the second nut at the side close to the second bearing.
6. The periodic tensioning belt drive of claim 1, wherein the rocker arm assembly comprises a rocker arm body and a rotating shaft;
one end of the rocker arm body is connected with the tensioning wheel, and the other end of the rocker arm body is connected with the distance changing assembly;
the rocker arm body is movably hinged with the rotating shaft, and the rocker arm body is installed on the frame through the rotating shaft.
7. The periodic tensioning belt drive of claim 1, wherein the first pulley comprises a first drive shaft and the second pulley comprises a second drive shaft;
the first belt pulley is arranged on the frame through the first transmission shaft;
the second belt wheel is arranged on the frame through the second transmission shaft.
8. The periodic tensioning belt drive of claim 7, wherein the first pulley further comprises a connection flange connected to the first drive shaft.
9. A transmission comprising a periodically tensioned belt drive as claimed in any one of claims 1 to 8.
10. A helicopter comprising an engine, a gearbox and a transmission according to claim 9, said transmission being connected to said engine and said gearbox, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322764042.XU CN220791953U (en) | 2023-10-16 | 2023-10-16 | Periodically tensioning belt transmission mechanism, transmission device and helicopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322764042.XU CN220791953U (en) | 2023-10-16 | 2023-10-16 | Periodically tensioning belt transmission mechanism, transmission device and helicopter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220791953U true CN220791953U (en) | 2024-04-16 |
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ID=90655735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322764042.XU Active CN220791953U (en) | 2023-10-16 | 2023-10-16 | Periodically tensioning belt transmission mechanism, transmission device and helicopter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220791953U (en) |
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2023
- 2023-10-16 CN CN202322764042.XU patent/CN220791953U/en active Active
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