CN211391664U - Variable-pitch and fixed-pitch mixed lift device - Google Patents
Variable-pitch and fixed-pitch mixed lift device Download PDFInfo
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- CN211391664U CN211391664U CN201922281022.0U CN201922281022U CN211391664U CN 211391664 U CN211391664 U CN 211391664U CN 201922281022 U CN201922281022 U CN 201922281022U CN 211391664 U CN211391664 U CN 211391664U
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Abstract
The utility model discloses a variable-pitch mixed lift device, which comprises a first lift component, a second lift component and a mounting seat component positioned between the first lift component and the second lift component and playing a supporting role; at least one of the first lift assembly and the second lift assembly is a variable pitch lift assembly, and the propeller mechanisms of the first lift assembly and the second lift assembly are in a coaxial anti-propeller type motion mode. The structure not only can effectively improve the operation flexibility of the lift device, but also can give consideration to the safety of the lift device; meanwhile, the efficiency of the propeller can be greatly improved, the efficiency loss of the propeller is reduced by about 10%, and the wind resistance of the aircraft is stronger.
Description
Technical Field
The utility model relates to a lift device, concretely relates to variable pitch uses lift device thoughtlessly belongs to aircraft technical field.
Background
The gravity of aircraft is balanced to the lift that unmanned aerial vehicle etc. relied on a plurality of screws to produce, lets the aircraft can fly, controls the steady and the gesture of aircraft simultaneously through changing every motor rotor parameter. Each propeller exerts a tractive force on the drone due to the lift of the propeller, wherein the tractive force is directed upwards, and each propeller exerts a torque in a direction opposite to the direction of rotation of the propeller. In steady flight, i.e. when it appears to remain motionless in height and attitude, the propellers rotate at the same speed and the lift combines to compensate for the weight of the drone.
The invention patent with application number 201710469474.4 discloses a drone that allows this type of drone to fly not only with a rotating surface (i.e. the lift of the rotating wings), but also with fixed wings, similar to an aircraft, with the advantage of being easy to maneuver.
However, the loss of the power efficiency of the propeller (rotor) of the lifting mechanism is more than 20%, the wind resistance is poor, and once the motor fails, the whole lifting device is easy to fail.
Disclosure of Invention
The utility model aims at providing a novel variable pitch uses lift device thoughtlessly to the above-mentioned problem that exists among the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme:
a variable-pitch mixed lift device comprises a first lift assembly, a second lift assembly and a mounting seat assembly which is positioned between the first lift assembly and the second lift assembly and plays a supporting role; at least one of the first lift assembly and the second lift assembly is a variable pitch lift assembly, and propeller mechanisms of the first lift assembly and the second lift assembly are in a coaxial reverse propeller type motion mode.
Preferably, one of the first lift assembly and the second lift assembly is a variable pitch lift assembly, and the other is a fixed pitch lift assembly. As for the specific structure, the mounting mode of upper distance-fixing and lower distance-fixing can be adopted, and the mounting mode of upper distance-fixing and lower distance-fixing can also be adopted. Preferably, the pitch lift assembly is located above the mount assembly, and the distance lift assembly is located below the mount assembly, i.e. at an upper pitch and a lower pitch.
Preferably, the first lift assembly and the second lift assembly are both pitch-variable lift assemblies.
Preferably, the pitch lift assembly comprises: the variable-pitch propeller comprises a first propeller mechanism, a variable-pitch mechanism and a first motor, wherein blades of the first propeller mechanism are connected with an output shaft of the first motor, and the variable-pitch mechanism drives blade angles of the first propeller mechanism to change.
Specifically, the aforementioned first propeller mechanism includes: a first blade, a hub and a bearing, the pitch change mechanism comprising: the device comprises a linear steering engine, a variable-pitch pull rod, a variable-pitch center piece and a pair of variable-pitch connecting pieces; the linear steering engine is installed in a shell formed by the upper motor installation seat and the lower motor installation seat, a push rod of the linear steering engine is connected with the variable-pitch pull rod, the variable-pitch pull rod is connected with the variable-pitch connecting piece, the variable-pitch connecting piece is fixedly connected with the propeller hub, and the linear steering engine drives the variable-pitch pull rod to move up and down so as to drive the variable-pitch connecting piece to rotate and drive the propeller blade angle of the first propeller blade to change.
Preferably, the aforementioned distance lift assembly comprises: the propeller mechanism comprises a second propeller mechanism and a second motor, wherein blades of the second propeller mechanism are connected with an output shaft of the second motor.
More preferably, the aforementioned mount assembly includes: go up motor mount pad, motor mount pad and a plurality of motor bracing piece down, wherein one end of motor bracing piece is located the cavity casing that motor mount pad and lower motor mount pad formed, and the other end stretches out in the casing. The motor support rod can provide effective support for the mounting seat assembly, and the stability of the mechanism is guaranteed.
Still preferably, the aforementioned second propeller mechanism includes: the second paddle and the fixed connecting piece connected with the second paddle are connected with an output shaft of the second motor.
Further preferably, the blades of the propeller mechanisms of the first lift assembly and the second lift assembly have the same size and are double-blade blades.
The utility model discloses an useful part lies in:
(1) according to the variable-pitch and fixed-pitch mixed lift device, at least one of the first lift assembly and the second lift assembly is a variable-pitch lift assembly, and the propeller mechanisms of the first lift assembly and the second lift assembly are in a coaxial reverse propeller type movement mode, so that the operation flexibility of the lift device can be effectively improved, and the safety of the lift device can be considered;
(2) the lift device preferably adopts a mode of combining variable pitch and fixed pitch, so that the efficiency of the propeller can be greatly improved, the loss of the power efficiency of the propeller is reduced by about 10 percent, and the wind resistance of the aircraft is stronger;
(3) the two coaxial counter-rotating mechanisms can back up each other to prevent the failure of the whole lifting device caused by the failure of the single motor, thereby further optimizing the safety of the lifting device;
(4) the pitch-variable mechanism is ingenious and reasonable in structural design, the up-and-down motion of the linear steering engine is ingeniously converted into the rotary motion of the propeller blades through the connection and the action among the components such as the linear steering engine, the pitch-variable pull rod, the pitch-variable central part, the pitch-variable connecting piece and the propeller hub, the angle of the blades can be rapidly adjusted through the pitch-variable mechanism, the pitch is rapidly changed, and the flight under different conditions is flexibly adapted.
Drawings
Fig. 1 is a schematic structural view of an embodiment 1 of the variable pitch hybrid lift device of the present invention;
fig. 2 is an exploded view of the embodiment shown in fig. 1.
The meaning of the reference symbols in the figures:
1. the variable-pitch lift assembly comprises a variable-pitch lift assembly, 2, a fixed-pitch lift assembly, 3, a mounting seat assembly, 4, an upper motor mounting seat, 5, a lower motor mounting seat, 6, a motor supporting rod, 7, a first blade, 8, a propeller hub, 9, a linear steering engine, 10, a variable-pitch pull rod, 11, a variable-pitch center piece, 13, a first motor, 14, a second motor, 15, a second blade, 16 and a fixed connecting piece.
Detailed Description
The invention will be further described with reference to the following drawings and specific examples:
in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "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, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1 and fig. 2, the variable-pitch hybrid lift device of the present embodiment mainly includes a first lift assembly, a second lift assembly, and a mounting base assembly 3 located therebetween and used for supporting, wherein the first lift assembly and the second lift assembly are respectively disposed on the upper side and the lower side of the mounting base assembly 3, and the propeller mechanisms of the first lift assembly and the second lift assembly are in a coaxial anti-propeller type motion mode. The coaxial counter-propellers mean that transmission shafts used by propeller blades of the first lift assembly and the second lift assembly are on the same axis, but the rotation directions are opposite, so that the unidirectional rotation deflection moment is balanced, and the power efficiency loss of the propellers can be reduced by about 10%.
Furthermore, it should be noted that the blades of the propeller mechanisms of the first lift assembly and the second lift assembly are the same in size and are double-bladed paddles. And the paddles are oppositely disposed, i.e., the paddle above has its projecting face upward, and the paddle below has its projecting face downward.
The first lift assembly and the second lift assembly are mutually standby, the failure of the whole lift device caused by the fault of the single motor can be prevented, and the safety of the lift device is further optimized. Furthermore, at least one of the two lift assemblies is a pitch-variable lift assembly 1. Specifically, in this embodiment 1, the first lift assembly located above the mount assembly 3 is a variable pitch lift assembly 1, and the second lift assembly located below the mount is a fixed pitch lift assembly 2.
The mount assembly 3 effectively supports the first lift assembly and the second lift assembly, and comprises: go up motor mount pad 4, motor mount pad 5 and a plurality of motor support pole 6 down, wherein one end of motor support pole 6 is located the cavity casing that motor mount pad 4 and motor mount pad 5 formed down, and the other end stretches out in the casing. The motor support rod 6 can provide effective support for the mounting base assembly 3, and the stability of the device is guaranteed.
As shown in fig. 2, the pitch lift assembly 1 located above comprises: the variable-pitch propeller comprises a first propeller mechanism, a variable-pitch mechanism and a first motor 13, wherein blades of the first propeller mechanism are connected with an output shaft of the first motor 13, and the variable-pitch mechanism drives blade angles of the first propeller mechanism to change, namely, the variable pitch is realized. Specifically, the first propeller mechanism includes: first blade 7, hub 8 and a bearing (inside hub 8, not shown in the figures), the pitch mechanism comprising: the device comprises a linear steering engine 9, a variable-pitch pull rod 10, a variable-pitch center piece 11 and a pair of variable-pitch connecting pieces; the linear steering engine 9 is installed in a shell formed by the upper motor installation seat 4 and the lower motor installation seat 5, a push rod of the linear steering engine 9 is connected with the variable-pitch pull rod 10, the variable-pitch pull rod 10 is connected with the variable-pitch connecting piece, the variable-pitch connecting piece is fixedly connected with the propeller hub 8, and the linear steering engine 9 drives the variable-pitch pull rod 10 to move up and down so as to drive the variable-pitch connecting piece to rotate to drive the blade angle of the first blade 7 to change.
As shown in fig. 2, the hub 8 is divided into an upper piece and a lower piece which are fixedly connected, a plurality of internal thread holes are formed at the end part of the hub 8 close to the variable pitch connecting piece, and mounting holes corresponding to the positions of the internal thread holes are formed on the variable pitch connecting piece. The integral transmission component is connected together through the connection of the internal thread hole and the mounting hole. In order to optimize the structure, a center hole is formed in the variable-pitch center piece 11, a push rod of the linear steering engine 9 penetrates through the center hole to be fixedly connected with the variable-pitch pull rod 10 located above, and therefore the linear steering engine 9 can drive the variable-pitch pull rod 10 to move up and down when moving up and down. The pitch-variable central part 11 is provided with a pair of connecting rods in the direction towards the propeller blades, and the bearings and the pitch-variable connecting pieces are sleeved on the connecting rods and are sealed in the propeller hub 8.
The variable-pitch pull rod 10 comprises an installation part and two connecting parts, the center of the installation part is fixedly connected with the end part of a push rod of the linear steering engine 9, the two connecting parts are vertically arranged at two ends of the installation part, and the free ends of the connecting parts are provided with connecting structures. And a mounting structure corresponding to the connecting structure is formed on the variable-pitch connecting piece, and the connecting structure is fixedly connected with the mounting structure through screws. Thus, the variable-pitch connecting piece and the first propeller mechanism can be connected into a whole.
Further preferably, the mounting structure is a projection formed in the circumferential direction of the variable pitch connecting piece and having a through hole, the connecting structure is at least provided with a boss on one surface facing the through hole, and the boss is limited in the through hole. And the angles of the lugs on the two variable-pitch connecting pieces are staggered by 180 degrees, so that the rotating directions of the two blades are opposite, and the maximum variable pitch is realized.
The construction of the lower distance lift assembly 2 is then simpler, as shown in fig. 2, comprising: the propeller mechanism comprises a second propeller mechanism and a second motor 14, and blades of the second propeller mechanism are connected with an output shaft of the second motor 14. Specifically, the second propeller mechanism includes: the second paddle 15 and a fixed connecting piece 16 connected with the second paddle 15, wherein the fixed connecting piece 16 is connected with an output shaft of the second motor 14. In this way, the second motor 14 can drive the blades of the second propeller mechanism to rotate, generating lift.
Example 2
This example differs from example 1 in that: the first lift assembly and the second lift assembly are both variable pitch lift assemblies 1, the structure and principle thereof are the same as those in embodiment 1, and details are not described in this embodiment.
Example 3
This example differs from example 1 in that: the first lift assembly located above is a fixed-distance lift assembly 2, and the second lift assembly located below is a variable-distance lift assembly 1, and the structure and principle of the first lift assembly are also the same as those in embodiment 1, which is not described in detail in this embodiment.
To sum up, the utility model discloses an among the variable pitch lift device that uses in mixture, have at least one for variable pitch lift subassembly 1 in its first lift subassembly and the second lift subassembly, and screw mechanism between them is coaxial anti-oar formula motion mode, not only can effectively improve the operation flexibility of lift device, can also compromise the security of lift device. Moreover, the lift force device can greatly improve the efficiency of the propeller, reduce the power efficiency loss of the propeller by about 10 percent, and simultaneously enable the wind resistance of the aircraft to be stronger.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a variable pitch uses lift device thoughtlessly which characterized in that: the lift assembly comprises a first lift assembly, a second lift assembly and a supporting mounting seat assembly positioned between the first lift assembly and the second lift assembly; at least one of the first lift assembly and the second lift assembly is a variable pitch lift assembly, and propeller mechanisms of the first lift assembly and the second lift assembly are in a coaxial reverse propeller type motion mode.
2. The variable-pitch hybrid lift device according to claim 1, wherein: one of the first lift assembly and the second lift assembly is a variable-pitch lift assembly, and the other one of the first lift assembly and the second lift assembly is a fixed-pitch lift assembly.
3. The variable-pitch hybrid lift device according to claim 1, wherein: the first lift assembly and the second lift assembly are both variable-pitch lift assemblies.
4. The variable-pitch hybrid lift device according to claim 1, wherein: the pitch lift assembly comprises: the variable-pitch propeller comprises a first propeller mechanism, a variable-pitch mechanism and a first motor, wherein blades of the first propeller mechanism are connected with an output shaft of the first motor, and the variable-pitch mechanism drives blade angles of the first propeller mechanism to change.
5. The variable-pitch hybrid lift device according to claim 2, wherein: the distance lift assembly comprises: the propeller mechanism comprises a second propeller mechanism and a second motor, wherein blades of the second propeller mechanism are connected with an output shaft of the second motor.
6. The variable-pitch hybrid lift device according to claim 2, wherein: the variable-pitch lift assembly is located above the mounting seat assembly, and the fixed-pitch lift assembly is located below the mounting seat assembly.
7. The variable-pitch hybrid lift device according to claim 4, wherein: the mount assembly includes: go up motor mount pad, motor mount pad and a plurality of motor bracing piece down, wherein one end of motor bracing piece is located the cavity casing that motor mount pad and lower motor mount pad formed, and the other end stretches out in the casing.
8. The variable pitch hybrid lift device of claim 7, wherein: the first propeller mechanism includes: a first blade, a hub and a bearing, the pitch change mechanism comprising: the device comprises a linear steering engine, a variable-pitch pull rod, a variable-pitch center piece and a pair of variable-pitch connecting pieces; the linear steering engine is installed in a shell formed by the upper motor installation seat and the lower motor installation seat, a push rod of the linear steering engine is connected with the variable-pitch pull rod, the variable-pitch pull rod is connected with the variable-pitch connecting piece, the variable-pitch connecting piece is fixedly connected with the propeller hub, and the linear steering engine drives the variable-pitch pull rod to move up and down so as to drive the variable-pitch connecting piece to rotate and drive the propeller blade angle of the first propeller blade to change.
9. The variable pitch hybrid lift device of claim 5, wherein said second propeller means comprises: the second paddle and the fixed connecting piece connected with the second paddle are connected with an output shaft of the second motor.
10. The variable-pitch mixed lift device according to any one of claims 1 to 9, wherein the propeller mechanisms of the first lift assembly and the second lift assembly have the same size and are double-bladed propellers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922281022.0U CN211391664U (en) | 2019-12-18 | 2019-12-18 | Variable-pitch and fixed-pitch mixed lift device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922281022.0U CN211391664U (en) | 2019-12-18 | 2019-12-18 | Variable-pitch and fixed-pitch mixed lift device |
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| Publication Number | Publication Date |
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| CN211391664U true CN211391664U (en) | 2020-09-01 |
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| CN201922281022.0U Active CN211391664U (en) | 2019-12-18 | 2019-12-18 | Variable-pitch and fixed-pitch mixed lift device |
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