A puller for helicopter blade connecting bolts

Abstract

The present application belongs to the technical field of heavy component dismounting tool design, and relates to a puller for helicopter blade connecting bolt. The puller comprises a handle, a pin and a base. The whole is in a rod shape, the top of the base is a forked ear, the handle is connected with the base through the pin, and the handle is in a long circular ring structure and can rotate through the pin. The bottom of the base is provided with a ring-shaped tray. In use, the handle is rotated to be in a vertical state, the puller is integrally inserted into the hollow part of the helicopter blade connecting bolt from bottom to top, the ring-shaped tray is in contact with the bottom of the helicopter blade connecting bolt, and the helicopter blade connecting bolt is driven to be pulled out upward. In the use process, the base body and the tray are firmly fixed with the blade connecting bolt, the pulling force is transmitted to the base through the pin by pulling the handle, and then the blade connecting bolt is pulled out. The problems of difficulty in finding the force point, inconvenience in operation and danger caused by hand slipping are effectively solved, and the work efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of disassembly tooling design for critical components, and relates to a puller for helicopter rotor blade connecting bolts. Background Technology

[0002] Currently, most helicopters connect their main rotor blades to the main rotor hub via hollow blade connecting bolts. During the process of removing the blade connecting bolts, the main rotor blades sag naturally due to gravity while installed, causing a decrease in the clearance between the connecting bolts and the main rotor hub and blade bushings. This increases friction, making them difficult to pull out directly. Furthermore, the portion of the connecting bolts exposed outside the bushings is relatively small, making it difficult to find a leverage point when removing them, hindering operation and increasing the risk of slippage and potential danger. Summary of the Invention

[0003] This invention provides a puller for helicopter rotor blade connecting bolts. It is easy to operate, safe, efficient, and low in cost.

[0004] Technical solution

[0005] A puller for helicopter rotor blade connecting bolts includes a handle 1, a pin 2, and a base 3. The base is rod-shaped with a fork-shaped lug at the top. The handle 1 is connected to the base 3 via the pin 2. The handle 1 has an elongated ring structure and can be rotated via the pin 3. The bottom of the base 3 has an annular tray. In use, the handle 1 is rotated to a vertical position, and the puller is passed through the hollow part of the helicopter rotor blade connecting bolt from bottom to top. The annular tray contacts the bottom of the helicopter rotor blade connecting bolt, causing the helicopter rotor blade connecting bolt to be pulled upwards.

[0006] Furthermore, the base 3 is made of PA6 hard nylon to avoid damaging the helicopter rotor blade connecting bolts.

[0007] Furthermore, the handle 1 is made of 45 steel.

[0008] Furthermore, one of the long sides of the handle 1 is provided with a positioning groove. When the extractor passes through the helicopter rotor blade connecting bolt, the handle 1 is rotated to a horizontal state, and the pin 3 is inserted into the positioning groove. The force is evenly distributed during extraction, and the handle 1 is not easy to shake.

[0009] Furthermore, the pin 2 is made of 45 steel, and the pin 2 passes through the hollow part of the handle 1 and is fixed in the mounting hole of the base 3 by epoxy resin.

[0010] Furthermore, the outer diameter of the base 3 is smaller than the diameter of the hollow part of the helicopter rotor blade connecting bolt, ensuring that no interference occurs during passage.

[0011] Technical effect

[0012] The invention has a rod-shaped structure. In use, the handle is first adjusted to be parallel to the base so that the puller passes through the hollow blade connecting bolt. After the base tray contacts the bottom of the blade connecting bolt, the handle is placed horizontally so that the pin is engaged in the positioning groove of the handle.

[0013] Pulling the handle allows the rotor blade connecting bolts to be pulled out along with the helicopter rotor blade connecting bolt puller. This makes operation safer and more efficient.

[0014] During use, this invention relies on the base body and tray to be securely fixed to the blade by connecting bolts. By pulling the handle, the pulling force is transmitted to the base through the pin, thereby pulling out the blade connecting bolts. This effectively solves the problems of difficulty in finding the point of leverage, inconvenient operation, and easy slippage leading to danger, thus improving work efficiency and enhancing operational safety. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a schematic diagram of the handle of the present invention;

[0018] Figure 4 This is a schematic diagram of the upper structure of the base of the present invention;

[0019] Figure 5 This is a schematic diagram of the lower structure of the base of the present invention;

[0020] Figure 6 This is a schematic diagram of the application environment of the present invention;

[0021] Figure 7 This is a schematic diagram illustrating the use of the present invention;

[0022] Among them: 1-handle, 2-pin, 3-base. Detailed Implementation

[0023] The present invention will be further described below with reference to embodiments. The following description represents only a portion of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] In the aforementioned helicopter rotor blade connecting bolt puller, the base is made of PA6 hard nylon and is rod-shaped. One end has a square groove and mounting hole for installing a handle and pin, and the other end has a ring-shaped tray for pulling out the rotor blade connecting bolt.

[0025] In the aforementioned helicopter rotor blade connecting bolt puller, the handle is made of No. 45 steel and is a hollow strip with a positioning groove on one of its long sides.

[0026] In the aforementioned helicopter rotor blade connecting bolt puller, the pin is made of No. 45 steel, passes through the hollow part of the handle, and is fixed in the mounting hole of the base by epoxy resin.

[0027] Example 1

[0028] A puller for helicopter rotor blade connecting bolts includes three parts: a handle (1), a pin (2), and a base (3), forming a structure as follows: Figure 1-7 As shown.

[0029] The aforementioned helicopter rotor blade connecting bolt puller has a base made of PA6 hard nylon, and is a cylinder with a radius of 15mm and a length of 335mm. One end has a 10mm thick square groove and a 2.5mm radius mounting hole for installing a handle and pin, while the other end has a ring-shaped tray for pulling out the rotor blade connecting bolts.

[0030] In the aforementioned helicopter rotor blade connecting bolt puller, the handle is made of 45# steel, and is a long strip with a radius of 8mm and a center-to-center distance of 140mm. The hollow part is a long strip hollow structure with a radius of 3mm and a center-to-center distance of 140mm. A positioning groove with an angle of 126 degrees is provided on one long side of the handle.

[0031] In the aforementioned helicopter rotor blade connecting bolt puller, the pin is made of 45# steel and is cylindrical with a radius of 2.5mm and a length of 14mm. The pin passes through the hollow part of the handle and is fixed in the mounting hole of the base with epoxy resin.

[0032] Usage process

[0033] Step 1: When using, first adjust the handle (1) to be parallel to the base (3) so that the puller passes through the hollow propeller connecting bolt.

[0034] Step 2: Push the puller upwards until the tray of the base (3) contacts the bottom of the blade connecting bolt;

[0035] Step 3: Place the handle (1) horizontally and make the pin (2) lock in the positioning groove of the handle (1);

[0036] Step 4: Pull up the handle to pull out the rotor blade connection bolts along with the helicopter rotor blade connection bolt puller;

[0037] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein. The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A puller for extracting helicopter rotor blade connecting bolts, characterized in that, The device includes a handle, a pin, and a base. The base is rod-shaped with a fork-shaped lug at the top. The handle is connected to the base via a pin and has a long, circular ring structure that allows it to rotate via the pin. The bottom of the base has a ring-shaped tray. In use, the handle is rotated to a vertical position, and the puller is passed from bottom to top through the hollow part of the helicopter rotor blade connecting bolt. The puller contacts the bottom of the helicopter rotor blade connecting bolt through the ring-shaped tray, causing the helicopter rotor blade connecting bolt to be pulled upwards. One of the long sides of the handle has a positioning groove.

2. The helicopter rotor blade connecting bolt puller according to claim 1, characterized in that, The base is made of PA hard nylon.

3. A puller for extracting helicopter rotor blade connecting bolts according to claim 2, characterized in that, The handle is made of 45 steel.

4. A puller for extracting helicopter rotor blade connecting bolts according to claim 3, characterized in that, After the extractor passes through the helicopter rotor blade connecting bolt, the handle is rotated to a horizontal position, and the pin is engaged in the positioning groove, so that the force is evenly distributed during extraction.

5. A puller for extracting helicopter rotor blade connecting bolts according to claim 4, characterized in that, The pin is made of No. 45 steel.

6. A puller for extracting helicopter rotor blade connecting bolts according to claim 5, characterized in that, The pin passes through the hollow part of the handle and is fixed to the mounting hole in the base with epoxy resin.

7. A puller for extracting helicopter rotor blade connecting bolts according to claim 6, characterized in that, The outer diameter of the base is smaller than the diameter of the hollow part of the helicopter rotor blade connecting bolt, ensuring that no interference occurs during passage.

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