CN210661258U - Transmission system for realizing double-engine parallel operation based on speed reducer - Google Patents
Transmission system for realizing double-engine parallel operation based on speed reducer Download PDFInfo
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- CN210661258U CN210661258U CN201920236875.XU CN201920236875U CN210661258U CN 210661258 U CN210661258 U CN 210661258U CN 201920236875 U CN201920236875 U CN 201920236875U CN 210661258 U CN210661258 U CN 210661258U
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Abstract
The utility model discloses a transmission system for realizing double-engine parallel operation based on a speed reducer, which comprises two power output mechanisms, a parallel operation speed reducing mechanism and an output speed reducing mechanism; the two power output mechanisms are symmetrically arranged at two sides of the parallel operation speed reducing mechanism; the parallel operation speed reducing mechanism comprises a bottom box body, a rod-shaped or cylindrical middle transmission part rotatably arranged on the bottom box body, a bottom bevel gear fixedly connected with the middle transmission part, and two bevel gear shafts symmetrically arranged, wherein the bevel gear ends of the bevel gear shafts are in meshing transmission with the bottom bevel gear, and the shaft ends of the bevel gear shafts extend out of the bottom box body and are in transmission connection with a power output shaft of the power output mechanism through an overrunning clutch. The utility model discloses realize the doubling of two engines by a doubling reduction gears, improve the total output of system, two engines can simultaneous working, also can the autonomous working.
Description
Technical Field
The utility model belongs to the technical field of unmanned aerial vehicle, concretely relates to transmission system based on double-engine parallel operation is realized to reduction gear.
Background
At present, many rotor unmanned aerial vehicle on the market is mainly the fixed pitch electric drive, because the energy density of battery is less than the fuel far away, receives the restriction of battery, and many rotor of fixed pitch motor drive mainly used is taken a photograph by plane, and the time of endurance is short, and the light in weight of ability load can not satisfy the demand of other types of civilian unmanned aerial vehicle, for example: high-altitude fire fighting, pesticide spraying, heavy object conveying in narrow space and the like.
Along with the technological development progress, the feather oil moves four rotor unmanned aerial vehicle has appeared, has broken through the restriction of load and duration, but the feather oil that is used commonly at present moves four rotor unmanned aerial vehicle and is belt pulley transmission, and the single engine setting, this kind of transmission type, inefficiency, flight stability are poor, and for the single engine setting, in case the engine breaks down, the rotor can't rotate, will cause the flight accident.
To this current situation, need provide a new two oil and move unmanned aerial vehicle, make rotor unmanned aerial vehicle operation more steady, efficiency is higher, and if an engine breaks down, the continuation of the journey of short time is carried out to the conditional, guarantees that unmanned aerial vehicle steadily descends.
Chinese patent CN107010229A discloses an unmanned aerial vehicle is moved to two engines, including the frame, along a plurality of rotors of circumference evenly distributed, two be used for driving a plurality ofly the edge of a wing pivoted engine simultaneously, be used for with two distribute to a plurality of behind the power coupling of engine output the transmission system of rotor has solved many rotor unmanned aerial vehicle load and continuation of the journey to some extent, inefficiency and flight stability subalternation problem.
However, when the two engines are in parallel operation, the two engines are coupled by means of the parallel operation gear, and due to the fact that the two engines are not started synchronously and the rotating speeds are inconsistent, serious impact is caused to a transmission system, and actual output power is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a transmission system based on reduction gear realizes twin-engine parallel operation, and this transmission system based on reduction gear realizes twin-engine parallel operation has principle simple accurate, advantage that the reliability is high.
The utility model discloses a realize through following technical scheme:
a transmission system for realizing double-engine parallel operation based on a speed reducer comprises two power output mechanisms, a parallel operation speed reducing mechanism and an output speed reducing mechanism;
the two power output mechanisms are symmetrically arranged at two sides of the parallel operation speed reducing mechanism;
the parallel operation speed reducing mechanism comprises a bottom box body, a rod-shaped or cylindrical middle transmission part rotatably arranged on the bottom box body, a bottom bevel gear fixedly connected with the middle transmission part, and two bevel gear shafts symmetrically arranged, wherein the bevel gear ends of the bevel gear shafts are in meshing transmission with the bottom bevel gear, and the shaft ends of the bevel gear shafts extend out of the bottom box body and are in transmission connection with a power output shaft of the power output mechanism through an overrunning clutch.
In the above technical solution, the intermediate transmission part is provided with an upper limit ring above the bottom bevel gear, an upper limit bearing positioned by the upper cover plate of the bottom case is supported by the upper limit ring, and a lower limit bearing is provided between the bottom end of the intermediate transmission part and the lower bottom plate of the bottom case.
In the above technical solution, the bottom case further includes a supporting cylinder fixedly connected to the upper cover plate, the middle transmission part penetrates out of the supporting cylinder and a bearing is disposed on the top of the middle transmission part.
In the technical scheme, the middle transmission part is provided with a lower limiting ring for limiting the bevel gear, the upper part of a central hole of the bevel gear is in interference fit with the middle transmission part, the middle part of the central hole of the bevel gear is in spline fit with the middle transmission part, and the lower part of the central hole of the bevel gear is in transition fit with the middle transmission part.
In the technical scheme, the oil level indicator further comprises a side box body fixedly connected with the side part of the bottom box body, the bevel gear shaft is rotatably matched with the side box body, an oil level mirror is arranged on the bottom box body, and an oil drain plug is arranged on the lower box plate.
In the technical scheme, the shaft rod of the bevel gear shaft is positioned relative to the side box body through the front bearing and the rear bearing, and an oil seal is arranged between the side box body and the shaft rod of the bevel gear shaft.
In the above technical scheme, the bearing is a tapered roller bearing, and the oil seal is a double oil seal.
In the above technical solution, the output speed reducing mechanism includes a case, and an output shaft penetrating through and rotatably engaged with the case, and the intermediate transmission part extends into the case and is in transmission connection with the output shaft.
In the technical scheme, two ends of the output shaft are respectively in transmission connection with the transmission shaft, and the transmission shafts are connected through the diaphragm coupling by a plurality of sections of shafts.
The utility model discloses an advantage and beneficial effect do:
the utility model discloses realize the doubling of two engines by a doubling reduction gears, improve the total output of system, two engines can simultaneous working, also can the autonomous working. When two engines work simultaneously, if one engine fails, the engine can be disconnected with the transmission system, and the other engine continues to drive the transmission system to work. Because the probability of two engines simultaneously failing is far less than that of one engine, the reliability of the system is greatly improved. The utility model discloses increased elastic coupling and freewheel clutch between engine and the reduction gears that parallels and reduce and strike and vibrations, coordinate the rotation of two engines.
Drawings
Fig. 1 the utility model discloses a structural schematic of transmission system based on reduction gear realizes twin-engine parallel operation.
Fig. 2 is the utility model discloses a schematic diagram of structural section of transmission system based on reduction gear realizes twin-engine and car.
Fig. 3 is a partially enlarged schematic view of the transmission system for realizing twin-engine parallel operation based on the speed reducer of the present invention.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
Example one
The utility model discloses a transmission system for realizing double-engine parallel operation based on a speed reducer, which comprises two power output mechanisms 1, a parallel operation speed reducing mechanism and an output speed reducing mechanism; the power output mechanism is a rotary power output mechanism, such as a piston engine, a turboshaft engine, a motor and the like.
The two power output mechanisms are symmetrically arranged at two sides of the parallel operation speed reducing mechanism, and the power output shafts are coaxially arranged but have opposite rotating directions;
the parallel operation speed reducing mechanism comprises a bottom box body 4, a rod-shaped or cylindrical middle transmission part 41 which is rotatably arranged on the bottom box body, a bottom bevel gear 42 which is fixedly connected with the middle transmission part, and two bevel gear shafts 43 which are symmetrically arranged, wherein the bevel gear ends of the bevel gear shafts are in meshing transmission with the bottom bevel gear, and the shaft ends of the bevel gear shafts extend out of the bottom box body and are in transmission connection with a power output shaft of the power output mechanism 1 through an overrunning clutch 3. The input shaft (i.e., the bevel gear shaft) of the parallel reduction mechanism and the external connection mode include, but are not limited to, a key connection or a spline connection. A pair of bevel gears are used for transmitting motion and power, the tooth system of the bevel gears can be Greenson system tapered teeth or Clinberg system high teeth, and the rotation direction of the bevel gears can be left-handed or right-handed according to the rotation direction of an input shaft.
Meanwhile, an elastic coupling 2 is correspondingly arranged between the power output shaft and the overrunning clutch so as to reduce power transmission vibration and compensate installation errors in different directions. The overrunning clutch can adapt to the asynchronism of the two power output mechanisms, or can be automatically disconnected with the transmission system after one of the two engines stops working due to faults, so that the transmission system can still work normally, and the safety factor of the transmission system is improved.
The utility model discloses a characteristics are with one set of parallel operation reduction gear and output reduction gear realize the parallel operation of two engines, then carry preceding, back rotor respectively to power, or main rotor and tail-rotor. The two engines can work simultaneously or independently. When two engines work simultaneously, if one engine fails, the engine can be disconnected with the transmission system, and the other engine continues to drive the transmission system to work. Because the probability of two engines simultaneously failing is far less than that of one engine, the reliability of the system is greatly improved.
The two power output mechanisms are symmetrically arranged, so that the overall load is reduced, the operation stability is improved, a two-stage speed reduction structure is adopted, the speed reduction is reasonably configured, the assembly and the maintenance are convenient, the application range is wide, and the two-stage speed reduction mechanism can be widely applied to the fields of helicopters and industries and comprises but not limited to a tandem type double-rotor or single-rotor helicopter with a tail rotor.
Example two
Specifically, the intermediate transmission part 41 is provided with an upper limit ring 44 above the bottom bevel gear, an upper limit bearing positioned by the upper cover plate of the bottom case body is supported against the upper limit ring, and a lower limit bearing 45 is arranged between the bottom end of the intermediate transmission part and the lower bottom plate of the bottom case body. The design mode of upper and lower clamping and positioning is adopted, the middle transmission part is positioned stably and reliably, and smooth transmission is ensured.
The bottom box body is of a downward convex structure so as to be convenient for assembling the bearing and the oil seal, and the positioning effect on the middle transmission part is increased on the premise of not increasing the volume of the bottom box body. The bottom box body forms an oil tank so as to ensure transmission heat dissipation, and a plurality of heat dissipation convex edges are arranged on the outer wall of the bottom box body so as to improve the heat dissipation effect. The bottom box body is provided with an oil level mirror, the upper part of the bottom box body is provided with an oil filling plug, the bottom of the bottom box body is provided with an oil discharging plug, and the oil level mirror can be used for observing whether the adding amount of lubricating oil is enough or not. When the oil inlet plug is opened, the speed reducer can be subjected to oiling operation, and when the oil drain plug is opened, the speed reducer can be subjected to oil drain operation.
The bottom box body further comprises a supporting cylinder 46 fixedly connected with the upper cover plate, the middle transmission part penetrates out of the supporting cylinder, and a bearing is arranged at the top of the middle transmission part. The supporting cylinder upper end with middle transmission portion between be provided with the sealing strip, utilize the sealing strip can effectively prevent the dust entering, the setting of supporting cylinder has increased the heat radiating area of end box in fact moreover, is favorable to improving holistic radiating effect.
Preferably, the middle transmission part is provided with a lower limiting ring for limiting the bevel gear, the upper part of a central hole of the bevel gear is in interference fit with the middle transmission part, the middle part of the central hole of the bevel gear is in spline fit with the middle transmission part, and the lower part of the central hole of the bevel gear is in transition fit with the middle transmission part.
When the bevel gear shaft and bevel gear are engaged, the force applied to the bevel gear can be reduced to three forces at the midpoint of the tooth width, one horizontal leftward force F1, one vertical downward force F2, and one outward force Ft perpendicular to the plane of the paper. The bending moment generated by F1 is borne by the cylindrical interference fit part II, the bending moment generated by F2 is borne by the cylindrical transition fit part III, and the torque generated by Ft is borne by the spline I. Therefore, the stress of the connecting part of the middle transmission part is dispersed, the support rigidity of the bevel gear is better, and the bevel gear is not easy to deform.
The utility model discloses an intermediate drive portion comprises spline connection part, face of cylinder interference fit part and face of cylinder transition fit part triplex with bevel gear's transmission, effectively improves its atress and distributes, under the condition that uses the same bevel gear and intermediate drive portion, can make moment of torsion and moment of flexure bear by the connection structure of difference, the atress that reduces intermediate drive portion is concentrated to improve bevel gear's rigidity, make bevel gear's flank of tooth contact better, realize the transfer function of motion and power.
Further, the side box body 47 is fixedly connected with the side part of the bottom box body, the bevel gear shaft is rotatably matched with the side box body, a shaft rod of the bevel gear shaft is positioned relative to the side box body through a front bearing and a rear bearing, an oil seal is arranged between the shaft rod of the side box body and the shaft rod of the bevel gear shaft, the bearings are tapered roller bearings, and the oil seal is a double oil seal.
The bearing is a tapered roller bearing and has the advantage of high bearing capacity. The oil seal is a double oil seal. The double oil seals are adopted for sealing, and the double-oil seal has the advantage of good sealing performance. Adopt solitary side box structure, dismantle convenient assembly nature good.
EXAMPLE III
The output speed reducing mechanism comprises a box body 50 and an output shaft 5 which penetrates through the box body and is in rotatable fit with the box body, the middle transmission part extends into the box body and is in transmission connection with the output shaft 5, two ends of the output shaft are in transmission connection with transmission shafts respectively, the transmission shafts 6 are connected through diaphragm couplers by multiple sections of shafts, if the transmission shafts are three sections of shafts, the diaphragm couplers are arranged between the shafts, and the installation difficulty is reduced.
The transmission connection can be formed by a bevel gear transmission mechanism, a cylindrical gear transmission mechanism, a planetary gear train transmission mechanism or a combination of the above mechanisms. When the bevel gear transmission is adopted, an output bevel gear 51 is fixedly arranged on the output shaft, a bevel gear 52 in transmission connection with the output bevel gear is arranged at the end part of the middle transmission, namely, the reversing speed reduction function is realized, and the speed reduction is realized in the same direction by adopting other mechanisms.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.
Claims (8)
1. The utility model provides a transmission system based on reduction gear realizes twin-engine and car, its characterized in that: the system comprises two power output mechanisms, a parallel operation speed reducing mechanism and an output speed reducing mechanism;
the two power output mechanisms are symmetrically arranged at two sides of the parallel operation speed reducing mechanism;
the parallel operation speed reducing mechanism comprises a bottom box body, a rod-shaped or cylindrical middle transmission part rotatably arranged on the bottom box body, a bottom bevel gear fixedly connected with the middle transmission part, and two bevel gear shafts symmetrically arranged, wherein the bevel gear ends of the bevel gear shafts are in meshing transmission with the bottom bevel gear, and the shaft ends of the bevel gear shafts extend out of the bottom box body and are in transmission connection with a power output shaft of the power output mechanism through an overrunning clutch.
2. The transmission system for realizing the double-engine parallel operation based on the speed reducer as claimed in claim 1, wherein: the middle transmission part is provided with an upper limit ring above the bottom gear shaft, an upper limit bearing positioned by an upper cover plate of the bottom box body is propped against the upper limit ring, and a lower limit bearing is arranged between the bottom end of the middle transmission part and a lower bottom plate of the bottom box body.
3. The transmission system for realizing the double-engine parallel operation based on the speed reducer as claimed in claim 2, is characterized in that: the bottom box body also comprises a supporting cylinder fixedly connected with the upper cover plate, and the middle transmission part penetrates out of the supporting cylinder and is provided with a bearing at the top.
4. The transmission system for realizing the double-engine parallel operation based on the speed reducer as claimed in claim 1, wherein: the middle transmission part is provided with a lower limiting ring for limiting the bevel gear, the upper part of a central hole of the bevel gear is in interference fit with the middle transmission part, the middle part of the central hole of the bevel gear is in spline fit with the middle transmission part, and the lower part of the central hole of the bevel gear is in transition fit with the middle transmission part.
5. The transmission system for realizing the double-engine parallel operation based on the speed reducer as claimed in claim 1, wherein: the shaft lever of the bevel gear shaft is positioned relative to the side box body through a front bearing and a rear bearing, and an oil seal is arranged between the side box body and the shaft lever of the bevel gear shaft.
6. The transmission system for realizing the double-engine parallel operation based on the speed reducer as claimed in claim 5, wherein: the bearing is a tapered roller bearing, and the oil seal is a double oil seal.
7. The transmission system for realizing the double-engine parallel operation based on the speed reducer as claimed in claim 1, wherein: the output speed reducing mechanism comprises a box body and an output shaft which penetrates through the box body and is rotatably matched with the box body, and the intermediate transmission part extends into the box body and is in transmission connection with the output shaft.
8. The transmission system for realizing the double-engine parallel operation based on the speed reducer as claimed in claim 1, wherein: the two ends of the output shaft are respectively connected with the transmission shaft in a transmission way, and the transmission shaft is connected by a plurality of sections of shafts through a diaphragm coupling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920236875.XU CN210661258U (en) | 2019-02-22 | 2019-02-22 | Transmission system for realizing double-engine parallel operation based on speed reducer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920236875.XU CN210661258U (en) | 2019-02-22 | 2019-02-22 | Transmission system for realizing double-engine parallel operation based on speed reducer |
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| CN210661258U true CN210661258U (en) | 2020-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915565A (en) * | 2019-02-22 | 2019-06-21 | 一飞智控(天津)科技有限公司 | Twin-engined and vehicle transmission system is realized based on retarder |
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2019
- 2019-02-22 CN CN201920236875.XU patent/CN210661258U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915565A (en) * | 2019-02-22 | 2019-06-21 | 一飞智控(天津)科技有限公司 | Twin-engined and vehicle transmission system is realized based on retarder |
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