CN214776523U - Propeller variable pitch link mechanism - Google Patents
Propeller variable pitch link mechanism Download PDFInfo
- Publication number
- CN214776523U CN214776523U CN202022710452.2U CN202022710452U CN214776523U CN 214776523 U CN214776523 U CN 214776523U CN 202022710452 U CN202022710452 U CN 202022710452U CN 214776523 U CN214776523 U CN 214776523U
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- connecting rod
- piston
- spherical
- paddle
- link mechanism
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Abstract
The utility model discloses a propeller variable pitch link mechanism, which comprises a connecting rod and a spherical slide block; the small end of the connecting rod is hinged to the tail end of the piston, and the large end of the connecting rod is hinged to the eccentric pin of the paddle; the piston is connected to the guide rail in a sliding way through a spline; the eccentric pin of the paddle is eccentrically fixed on the end surface of the paddle. The utility model discloses the angular variation performance that adaptation piston circumferencial direction manufacturing tolerance brought is strong, has prevented that the part from interfering and the motion jamming, and wearing and tearing slow down has prolonged life, has reduced use cost.
Description
Technical Field
The utility model relates to a screw displacement link mechanism.
Background
The variable pitch propeller needs the blades to change the angle, the rotation of the blade angle is circular motion, and the driving force is piston linear motion, so that a connecting rod is needed to be connected between the piston linear motion and the blade circular motion to form a crank connecting rod mechanism. The piston and the guide rail in the propeller hub are prevented from rotating circumferentially through splines, the existing connecting rod mechanism is poor in performance of adapting to angle changes caused by manufacturing tolerance in the circumferential direction of the piston, parts are interfered and movement clamping stagnation phenomena frequently occur, the connecting rod mechanism is seriously abraded, the service life is short, and once the connecting rod mechanism is seriously abraded and cannot be used, the connecting rod mechanism needs to be integrally replaced, and the use cost of the connecting rod mechanism is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above-mentioned problem that exists among the prior art, provide a screw displacement link mechanism, this link mechanism adapts to the piston circumferencial direction and makes the angular variation performance that tolerance brought strong, has prevented that the part from interfering and motion jamming, and wearing and tearing become slow, have prolonged life, have reduced use cost.
In order to achieve the above object, the technical solution of the present invention is: a propeller variable pitch link mechanism comprises a connecting rod and a spherical sliding block; the small end of the connecting rod is hinged to the tail end of the piston of the hydraulic cylinder, and the large end of the connecting rod is hinged to the eccentric pin of the paddle; the hydraulic cylinder piston is slidably connected to a guide rail in the propeller hub through a spline; the eccentric pin of the paddle is eccentrically fixed on the end surface of the paddle.
Further preferably, the small end of the connecting rod is flat, the middle part of the connecting rod is provided with a through hole, the connecting rod is arranged in the groove of the piston, and the connecting rod is connected with the piston by a positioning pin penetrating through the piston and the through hole at the small end of the connecting rod.
Further preferably, the big end of the connecting rod is flat, the middle part of the connecting rod is provided with a spherical inner hole, and a spherical sliding block matched with the spherical inner hole is rotatably arranged in the spherical inner hole; two grooves with the depth larger than that of the spherical inner hole are symmetrically arranged at two ends of the spherical inner hole; the middle part of the spherical sliding block is provided with a through hole, and the paddle eccentric pin is rotatably arranged in the through hole in the middle part of the spherical sliding block.
Further preferably, the roughness of the surfaces of the spherical inner hole of the connecting rod and the spherical sliding block is not lower than 0.1. The normal work of the connecting rod assembly is better ensured.
Due to the adoption of the scheme, the connecting rod is driven to move along with the linear reciprocating of the piston, and finally the connecting rod is converted into the circular motion of the eccentric pin of the paddle. In the process, the small end of the connecting rod can rotate around the positioning pin, and the large end of the connecting rod can rotate around the eccentric pin of the blade. Wherein, the spherical slider cooperates with the spherical hole of connecting rod main aspects, forms 360 all around rotations, can adapt to because of the circumferencial direction's of piston, guide rail spline cooperation department tolerance, prevents that the part from interfering and the motion jamming, and wearing and tearing are slowed down, have prolonged life. The abrasion is particularly serious at the connecting position of the eccentric pin of the blade along with the inevitable abrasion of mechanical matching, the abrasion is reduced because the eccentric pin of the blade is connected with the connecting rod through the spherical sliding block, the abrasion is reduced, the whole connecting rod does not need to be replaced after the abrasion is finished, and the use requirement can be met only by preparing and replacing the spherical sliding block, so the use cost is reduced.
Drawings
FIG. 1 is a schematic view of a variable pitch propeller configuration;
FIG. 2 is a schematic view of the internal structure of the middle connecting rod and the spherical sliding block of the present invention;
FIG. 3 is a front view of the connecting rod of the present invention;
FIG. 4 is a cross-sectional view AA in FIG. 3;
FIG. 5 is a front view of the spherical slider of the present invention;
fig. 6 is a BB cross-sectional view of fig. 5.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 6, the present embodiment includes a link 1 and a spherical slider 6. The small end 51 of the connecting rod 1 is hinged on the end of the piston 3, and the large end 52 thereof is hinged on the blade eccentric pin 2. Preferably, the connecting rod 1 has a flat small end 51 and a through hole 53 in the middle, and is mounted in a groove of the piston 3 and connected with the piston 3 by a positioning pin 7 passing through the piston 3 and the through hole 53 in the small end. Preferably, the big end 52 of the connecting rod 1 is flat, the middle part is provided with a spherical inner hole 54, and the spherical sliding block 6 matched with the spherical inner hole 54 is rotatably arranged in the spherical inner hole 54; two grooves 55 with the depth larger than that of the spherical inner hole 54 are symmetrically arranged at two ends of the spherical inner hole 54; the middle part of the spherical sliding block 6 is provided with a through hole, and the paddle eccentric pin 2 is rotatably arranged in the through hole in the middle part of the spherical sliding block. Preferably, the surface roughness of the spherical inner hole 54 of the connecting rod and the spherical sliding block 6 is not lower than 0.1. The piston 3 is slidable on the hub guide 4 by means of splines. The blade eccentric pin 2 is eccentrically fixed on the end surface of the blade.
Naturally, the invention also relates to other embodiments, and those skilled in the art can make corresponding changes and modifications according to the invention without departing from the spirit and substance of the invention, and these corresponding changes and modifications should be considered as improvements in the equivalent technology, and fall within the scope of protection of the claims of the invention.
Claims (5)
1. A propeller variable pitch link mechanism is characterized in that: it comprises a connecting rod and a spherical sliding block; the small end of the connecting rod is hinged to the tail end of the piston of the hydraulic cylinder, and the large end of the connecting rod is hinged to the eccentric pin of the paddle; the hydraulic cylinder piston is slidably connected to a guide rail in the propeller hub through a spline; the eccentric pin of the paddle is eccentrically fixed on the end surface of the paddle.
2. The propeller pitch link mechanism of claim 1, wherein: the small end of the connecting rod is flat, the middle part of the connecting rod is provided with a through hole, the connecting rod is arranged in the groove of the piston, and the connecting rod penetrates through the piston and the through hole at the small end of the connecting rod through a positioning pin so as to be connected with the piston.
3. A propeller pitch link mechanism according to claim 1 or 2, wherein: the big end of the connecting rod is flat, the middle part of the connecting rod is provided with a spherical inner hole, and a spherical sliding block matched with the spherical inner hole for use is rotatably arranged in the spherical inner hole; two grooves with the depth larger than that of the spherical inner hole are symmetrically arranged at two ends of the spherical inner hole; the middle part of the spherical sliding block is provided with a through hole, and the paddle eccentric pin is rotatably arranged in the through hole in the middle part of the spherical sliding block.
4. A propeller pitch link mechanism according to claim 3, wherein: the roughness of the spherical inner hole of the connecting rod and the surface of the spherical sliding block is not lower than 0.1.
5. A propeller pitch link mechanism according to claim 1 or 2, wherein: the roughness of the spherical inner hole of the connecting rod and the surface of the spherical sliding block is not lower than 0.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710452.2U CN214776523U (en) | 2020-11-20 | 2020-11-20 | Propeller variable pitch link mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710452.2U CN214776523U (en) | 2020-11-20 | 2020-11-20 | Propeller variable pitch link mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214776523U true CN214776523U (en) | 2021-11-19 |
Family
ID=78664654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022710452.2U Active CN214776523U (en) | 2020-11-20 | 2020-11-20 | Propeller variable pitch link mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214776523U (en) |
-
2020
- 2020-11-20 CN CN202022710452.2U patent/CN214776523U/en active Active
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