Manual torque changing tool for propeller blade angle
Patent Information
- Application Number
- CN202420942690.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-30
AI Technical Summary
During the installation of aircraft propellers, when manually changing the blade state, the rotation of the torque converter valve is difficult, which easily damages the propeller torque converter mechanism.
A manual torque converter tool for propeller blade angle is designed, including a fixed sleeve, a screw and a fixed pin. It is matched with the torque converter mounting groove through the fixed pin and fixed on the torque converter. The friction force is reduced by using the screw and cone structure to achieve the smooth rotation of the torque converter.
This tool can easily and conveniently rotate the torque converter valve, avoid damage to the propeller torque converter mechanism, and operate accurately and reliably, solving the problem of the torque converter valve stuck.
Smart Images
Figure CN222627657U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of aircraft manufacturing and relates to a manual torque changing tool for propeller blade angle. Background Art
[0002] When installing the propeller oil transfer pipe assembly on an aircraft, it is necessary to manually change the propeller blades from the reverse propeller state during hoisting to the feathering state. During the manual feathering process, in order to prevent damage to the torque valve in the torque actuator assembly, the torque valve on the torque actuator assembly needs to be rotated out clockwise, and then the blades are rotated by hand until they lightly touch the feathering stopper, thereby achieving the purpose of manual torque change. The torque valve is a cylindrical thin-walled structure with a protective shell of similar structure on the outside. The gap between the torque valve and the outer protective shell is about 5mm. The operator can only pinch the thin wall of the torque valve with his hands to slowly complete the unscrewing work. When the torque valve is stuck, the copper rod can only be inserted into the torque valve installation slot and hammered with a hammer to complete the rotation. This operation method is time-consuming and labor-intensive, and it is also easy to damage the propeller torque converter mechanism when using a copper rod and a hammer to knock. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a propeller blade angle manual torque change tool, which can easily and conveniently rotate the torque change valve to avoid damaging the propeller torque change mechanism.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A propeller blade angle manual torque changing tool, comprising a fixed sleeve, a screw rod and a fixed pin;
[0006] The front end of the fixed sleeve is a cylindrical cavity, and two radial through holes are arranged on both sides of the front end, and the cylindrical cavity is connected with the sleeve; the screw rod extends into the fixed sleeve, and the front end of the screw rod is a cone, which extends into the cylindrical cavity, and the tip of the cone faces the front end of the fixed sleeve; the middle section of the screw rod is provided with an external thread matching the fixed sleeve, and the rear end extends from the rear end of the fixed sleeve; the fixing pin is a double-layer stepped cylindrical boss, the upper boss is located in the through hole, and the lower boss is located in the cylindrical cavity, and the diameter of the lower boss is larger than the through hole on the fixed sleeve.
[0007] Preferably, the front end diameter of the fixed sleeve is equal to the inner diameter of the torque converter valve.
[0008] Preferably, the inner diameter of the cylindrical cavity is larger than the inner diameter of the middle portion of the fixed sleeve, and the diameter of the rear end of the cone is larger than the inner diameter of the middle portion of the fixed sleeve.
[0009] Preferably, a handle is provided at the rear end of the screw rod.
[0010] Furthermore, an anti-slip grid is provided on the handle.
[0011] Preferably, a handle is radially arranged at the rear end of the fixed sleeve.
[0012] Furthermore, the handle is divided into two parts, which are respectively arranged on both sides of the fixed sleeve.
[0013] Preferably, the diameter of the upper boss of the fixing pin is the same as the diameter of the hole on the propeller torque converter.
[0014] Preferably, the bottom end surface of the lower boss is an inclined surface, and the inclined surface fits with the conical surface of the cone at the front end of the screw rod.
[0015] Preferably, a spring is sleeved on the outer side of the upper boss, the top end of the spring is connected to the inner wall of the cylindrical cavity, and the bottom end of the spring is connected to the top end of the lower boss.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] The utility model mainly relies on the matching of the fixed pin and the hole shape on the torque valve installation slot, and the propeller blade angle manual torque conversion tool is fixed on the torque valve installation slot and fits tightly. There is no obvious swing during the rotation process, and the use is accurate. The knob on the rear end lead screw can lock the fixed pin position, and the connection is reliable. The propeller blade angle manual torque conversion tool meets the on-site construction environment and can easily solve the problem of torque valve jamming.
[0018] Furthermore, the force arm can be increased by a handle at the rear end of the tool.
[0019] Furthermore, the inclined surface at the bottom end of the lower boss fits with the conical surface of the cone at the front end of the screw rod, thereby reducing the friction force when the cone moves.
[0020] Furthermore, the spring on the fixing pin allows the fixing pin to automatically retract into the fixing sleeve when the cone moves backward. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the structure of the propeller blade angle manual torque changing tool of the utility model;
[0022] Figure 2 It is a cross-sectional view of the front end structure of the manual torque changing tool for propeller blade angle of the utility model.
[0023] Explanation of numbers in the figure: 1. fixed sleeve; 2. screw rod; 3. handle; 4. fixed pin. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0025] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0027] like Figure 1 and Figure 2 As shown, the propeller blade angle manual torque changing tool described in the utility model is composed of four parts: a fixed sleeve 1, a screw rod 2, a handle 3 and a fixed pin 4.
[0028] The fixed sleeve 1 is a circular sleeve rigid structure, the middle of the sleeve contains an internal thread, the front end is a cylindrical cavity structure, the front end diameter is equal to the inner diameter of the torque converter valve, and two radial through holes are arranged on both sides of the front end. The cylindrical cavity is connected to the inside of the sleeve, and the inner diameter of the cylindrical cavity is larger than the inner diameter of the middle part of the fixed sleeve 1.
[0029] The screw rod 2 is a rigid structural part. The screw rod 2 extends into the fixed sleeve 1. The front end is a cone structure. The cone extends into the cylindrical cavity. The tip of the cone faces the front end of the fixed sleeve 1. The diameter of the rear end of the cone is larger than the inner diameter of the middle part of the fixed sleeve 1. The middle section of the screw rod 2 is provided with an external thread matching the fixed sleeve 1, and the rear section extends from the rear end of the fixed sleeve 1.
[0030] A handle is provided at the rear section of the screw rod 2, and an anti-slip grid is provided on the handle.
[0031] The handle 3 is located at the rear end of the fixed sleeve 1 and is radially connected to the outer wall of the fixed sleeve 1 by welding. The handle 3 is divided into two parts, which are respectively arranged on both sides of the fixed sleeve 1.
[0032] The fixing pin 4 is a double-layer stepped cylindrical boss. The diameter of the upper boss matches the hole on the propeller torque converter mechanism and is equal to or slightly smaller than the diameter of the through hole on the fixing sleeve 1. The lower boss is located in the cylindrical cavity and has a diameter larger than the through hole on the fixing sleeve 1.
[0033] The bottom end surface of the lower boss is an inclined surface, which fits with the conical surface of the cone at the front end of the screw rod 2 to reduce the friction force when the cone moves.
[0034] A spring is sleeved on the outer side of the upper boss, the top of the spring is connected to the inner wall of the cylindrical cavity, and the bottom of the spring is connected to the top of the lower boss, so that when the cone moves backward, the fixing pin 4 is automatically retracted into the fixing sleeve 1.
[0035] When in use, rotate the handle at the rear end of the screw rod 2 counterclockwise to the maximum position, so that the screw rod 2 extends backward relative to the fixed sleeve 1, driving the cone to move backward, and the bottom end of the fixed pin 4 gradually contacts the small diameter part of the cone from the large diameter part of the cone. The fixed pin 4 moves into the cylindrical cavity under the action of the spring, so that the outer end surface of the fixed pin 4 is flush with the front end of the fixed sleeve 1. Put the propeller blade angle manual torque conversion tool into the torque conversion valve, insert the front end of the fixed sleeve 1 into the torque conversion valve, adjust the relative position of the propeller blade angle manual torque conversion tool and the torque conversion valve, and rotate the handle at the rear end of the screw rod 2 clockwise to the minimum position, so that the screw rod 2 extends forward relative to the fixed sleeve 1, driving the cone to move forward, and the cone pushes the two fixed pins 4 outward until the fixed pins 4 overcome the spring and extend into the installation groove of the torque conversion valve. Then turn the handle 3 clockwise to drive the torque conversion valve to rotate to the final position.
[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0037] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of the subject matter, nor should it be considered that the applicant has not considered the subject matter as part of the disclosed utility model subject matter.
Claims
1. A propeller blade angle manual torque changing tool, characterized in that: It comprises a fixed sleeve (1), a screw rod (2) and a fixed pin (4); The front end of the fixed sleeve (1) is a cylindrical cavity, and two radial through holes are arranged on both sides of the front end, and the cylindrical cavity is connected with the sleeve; the screw rod (2) extends into the fixed sleeve (1), and the front end of the screw rod (2) is a cone, which extends into the cylindrical cavity, and the tip of the cone faces the front end of the fixed sleeve (1); the middle section of the screw rod (2) is provided with an external thread matching the fixed sleeve (1), and the rear end extends from the rear end of the fixed sleeve (1); the fixing pin (4) is a double-layer stepped cylindrical boss, the upper boss is located in the through hole, and the lower boss is located in the cylindrical cavity, and the diameter of the lower boss is larger than the through hole on the fixed sleeve (1).
2. The propeller blade angle manual torque changing tool according to claim 1, characterized in that: The front end diameter of the fixed sleeve (1) is equal to the inner diameter of the torque converter valve.
3. The propeller blade angle manual torque changing tool according to claim 1, characterized in that: The inner diameter of the cylindrical cavity is larger than the inner diameter of the middle portion of the fixed sleeve (1), and the diameter of the rear end of the cone is larger than the inner diameter of the middle portion of the fixed sleeve (1).
4. The propeller blade angle manual torque changing tool according to claim 1, characterized in that: A handle is provided at the rear end of the screw rod (2).
5. The propeller blade angle manual torque changing tool according to claim 4, characterized in that: The handle is provided with an anti-slip grid.
6. The propeller blade angle manual torque changing tool according to claim 1, characterized in that: A handle (3) is radially arranged at the rear end of the fixed sleeve (1).
7. The propeller blade angle manual torque changing tool according to claim 6, characterized in that: The handle (3) is divided into two parts, which are respectively arranged on both sides of the fixed sleeve (1).
8. The propeller blade angle manual torque changing tool according to claim 1, characterized in that: The diameter of the upper boss of the fixing pin (4) is the same as the diameter of the hole on the propeller torque converter.
9. The propeller blade angle manual torque changing tool according to claim 1, characterized in that: The bottom end surface of the lower boss is an inclined surface, and the inclined surface fits the conical surface of the front end cone of the screw rod (2).
10. The propeller blade angle manual torque changing tool according to claim 1, characterized in that: A spring is sleeved on the outer side of the upper boss, the top end of the spring is connected to the inner wall of the cylindrical cavity, and the bottom end of the spring is connected to the top end of the lower boss.