Thin-wall shell inner hole supporting rod device

Abstract

The invention belongs to the technical field of supporting devices, and relates to a thin-wall shell inner hole supporting rod device. The device comprises a head fixing block, a chain column, a sliding block and a center column. The lower outer edge of the head fixing block is connected with the upper end of the chain column; the lower end of the column chain is connected with a sliding block which is sleeved on the central column. The chain columns can move upwards along with the sliding blocks to be supported and move downwards to contract, and clamping grooves are formed in the chain columns so that the edges of holes in the thin-wall structure can be clamped conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of supporting devices and relates to a supporting rod device for an inner hole of a thin-walled shell. Background Art

[0002] The reliability engineering process of a helicopter runs through the entire life cycle of the helicopter. As an important comprehensive design feature of the helicopter system, product reliability is very important for helicopters. The reliability of helicopter performance parameters and design indicators should also receive sufficient attention. As helicopter manufacturing technology continues to advance, high-precision, high-standard measurement methods and measurement technologies are also being continuously applied to helicopter measurement technology. Before a helicopter is delivered from the factory, the manufacturer must test / measure the various performance parameters and design indicators of the helicopter to determine whether they meet the allowable design range given by the design unit.

[0003] Before the helicopter enters the test flight, a large number of performance testing procedures need to be carried out on the ground, including activities such as horizontal measurement, ground weighing, compass correction, and various target calibrations. Before starting these activities, most activities require the helicopter to be adjusted to a horizontal state. In addition, some activities must determine the specific projection line of the current helicopter's longitudinal axis or the ground projection position of a point on the longitudinal axis to ensure that the activities can be carried out smoothly. For the convenience of measurement, the helicopter will set up reserved holes at multiple locations on the lower part of the fuselage. The traditional method for determining the longitudinal axis (projection point) is the plumb bob method. This method uses a pin to tie the rope tightly, insert it into the reserved hole, and drop the other end of the plumb bob to the ground. The two points before and after are projected on the ground to determine the longitudinal axis. This method is easily affected by external factors and leads to large measurement errors, such as the position of the installation hole deviating from the center of the hole, excessive wind speed, and plumb bob shaking. Summary of the invention

[0004] Purpose of the invention: To provide a thin-walled shell inner hole support rod device to solve the problem of low measurement accuracy, time-consuming and labor-intensive process in determining the longitudinal axis (projection point) of the helicopter, which greatly affects the work efficiency.

[0005] Technical Solution

[0006] Provided is a thin-wall shell inner hole support rod device, comprising: a head fixing block, a chain column, a sliding block, and a center column;

[0007] The lower end surface of the head fixing block is positioned and connected with the center column, and the lower outer edge of the head fixing block is connected to the upper end of the chain column; the lower end of the column chain is connected to the slider, and the slider is sleeved on the center column; the chain column can be propped up as the slider moves upward and shrinks when it moves downward, and a slot is provided on the chain column to facilitate clamping the edge of the hole on the thin-walled structure.

[0008] Furthermore, the head fixing block, the chain column and the sliding block form a hinge structure.

[0009] Further, the chain post includes an upper chain plate, a pin and a lower chain plate;

[0010] A pair of lugs are provided at both ends of the upper and lower chain plates;

[0011] The upper ear piece of the upper chain piece is connected to the lower outer edge of the head fixing block through a pin, and the pin serves as the rotation axis of the upper chain piece; the lower ear piece of the upper chain piece is connected to the upper ear piece of the lower chain piece through a pin to realize the supporting and contraction process of the upper chain piece and the lower chain piece; the lower ear piece of the lower chain piece is connected to the upper end surface of the slider through a pin.

[0012] Furthermore, a laser device is installed on the lower surface of the central column.

[0013] Further, the device also includes: a spring sheet arranged on the central column;

[0014] The spring sheet is located on the center column corresponding to the connection position of the upper and lower chain sheets after the chain column is fully retracted.

[0015] Furthermore, a groove is cut on the outer surface of the chain piece, and the groove is parallel to the inner surface of the chain piece.

[0016] Furthermore, the spring sheet is installed on the central column through a groove on the central column.

[0017] Furthermore, the chain columns have multiple links, and the overall structure needs to be symmetrically distributed to ensure high concentricity.

[0018] Beneficial effects:

[0019] 1. The overall structure of the present invention is completely symmetrical and has a high degree of concentricity. The structure can be shrunk into a cylinder, which is convenient for carrying. At the same time, the disassembly of the device does not require auxiliary tools, which is convenient for the staff to operate, thereby improving the efficiency of disassembly and assembly of the device.

[0020] 2. The hinge structure of the present invention can be unfolded to adapt to thin-walled shells with various apertures. The three-column structure is symmetrically arranged to achieve stable support. At the same time, the chain column groove design is affected by gravity during use, and the groove can stably clamp the surface of the thin-walled shell, thereby ensuring the stability of the device and preventing the device from being affected by the external environment.

[0021] 3. The lower end column of the present invention can be provided with connection structures such as threads according to task requirements, and other measuring equipment can be added through threaded connection to improve the scalability of the support rod device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following is a brief description of the contents and symbols in the drawings of this specification:

[0023] Figure 1 It is a schematic diagram of the unfolded structure of a thin-walled shell inner hole support rod device according to the present invention;

[0024] Figure 2 It is a schematic diagram of the contraction structure of a thin-walled shell inner hole support rod device according to the present invention;

[0025] Figure 3 It is an exploded view of a thin-walled shell inner hole support rod device according to the present invention;

[0026] Figure 4 This is an example diagram of a thin-walled shell inner hole support rod device equipped with a laser device as described in the present invention.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Head fixing block; 2. Chain column; 3. Sliding block; 4. Center column; 5. Spring sheet; 6. Pin; 7. Thin-walled inner hole; 8. Laser device. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-4 The specific implementation methods of the present invention, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operation and use methods, are further described below to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0031] Provided is a thin-walled shell inner hole support rod device, comprising: a head fixing block 1, a chain column 2, a sliding block 3, and a center column 4;

[0032] The lower end surface of the head fixing block is positioned and connected with the center column, and the lower outer edge of the head fixing block is connected to the upper end of the chain column; the lower end of the column chain is connected to the slider, and the slider is sleeved on the center column; the chain column can be propped up as the slider moves upward and shrinks when it moves downward, and a slot is provided on the chain column to facilitate clamping the edge of the hole on the thin-walled structure.

[0033] Furthermore, the head fixing block, the chain column and the sliding block form a hinge structure.

[0034] Further, the chain column includes an upper chain plate, a pin 6 and a lower chain plate;

[0035] A pair of lugs are provided at both ends of the upper and lower chain plates;

[0036] The upper ear piece of the upper chain piece is connected to the lower outer edge of the head fixing block through a pin, and the pin serves as the rotation axis of the upper chain piece; the lower ear piece of the upper chain piece is connected to the upper ear piece of the lower chain piece through a pin to realize the supporting and contraction process of the upper chain piece and the lower chain piece; the lower ear piece of the lower chain piece is connected to the upper end surface of the slider through a pin.

[0037] Furthermore, a laser device 8 is installed on the lower surface of the central column.

[0038] Furthermore, the device also includes: a spring sheet 5 arranged on the central column;

[0039] The spring sheet is located on the center column corresponding to the connection position of the upper and lower chain sheets after the chain column is fully retracted.

[0040] Furthermore, a groove is cut on the outer surface of the chain piece, and the groove is parallel to the inner surface of the chain piece.

[0041] Furthermore, the spring sheet is installed on the central column through a groove on the central column.

[0042] Furthermore, the chain columns have multiple links, and the overall structure needs to be symmetrically distributed to ensure high concentricity.

[0043] Example 1

[0044] like Figure 1-4 As shown, the present invention provides a thin-walled shell inner hole support rod device, including a head fixing block, a chain column, a slider, and a center column. The head fixing block is positioned and connected to the chain column and the center column. The chain column is divided into two layers, upper and lower, and each layer is provided with three chain columns, which are arranged at 120 degrees in pairs to form a three-chain column structure, which is installed between the head fixing block and the slider, and connected by a positioning pin to form a hinge structure. The slider is a circular ring structure, which belongs to the bottom support part of the hinge structure. It is fixed to the lower three-chain column structure by a pin, and moves vertically up and down with the transmission of the hinge structure. The upper end of the center column is positioned and connected to the head fixing block by a threaded connection. The overall structure is symmetrically distributed and has the characteristics of high concentricity.

[0045] Example 2

[0046] like Figure 1-4 As shown, the present invention provides a thin-walled shell inner hole support rod device, the outer surface of the chain column is cut with a groove, and the groove is parallel to the inner surface of the chain column. When the hinge structure is unfolded, the outer surface groove of the three-chain column structure can clamp the inner hole to achieve a stable support effect; when the hinge structure is retracted, the support rod device can be transformed into a complete cylinder. The outer wall of the center column is cut with a groove and embedded with a spring sheet, which is used to provide the support rod device with an initial horizontal tension from the retracted to the unfolded state.

[0047] Example 3

[0048] like Figure 4As shown, the present invention provides a thin-walled shell inner hole support rod device, the lower end of the center column can be processed with a threaded structure as needed, and equipped with laser devices and other equipment. The laser device can emit laser to project the required point or several points onto the ground, thereby meeting the needs of different tasks and improving the overall scalability of the device.

[0049] Working principle: With this technical solution, when the support rod of the inner hole 7 of the thin-walled shell is used, first pass the structure above the slider through the inner hole, hold the slider with your left hand, and pull down the center column with your right hand. The hinge structure is gradually expanded by the pulling force of the center column until the groove on the outer surface of the chain column catches the inner hole. At this time, the support rod device can be stably fixed on the inner hole. According to the task requirements, a laser device can be installed at the lower end of the center column to achieve accurate measurement. When the task is completed, pull the slider with your left hand and push up the center column with your right hand. The hinge structure is forced to shrink and the support rod device can be retracted and stored in a complete cylindrical shape. The structure of this device is completely symmetrical and has high concentricity. It meets the requirements of scientific measurement and is simple to operate, easy to use and convenient to carry.

Claims

1. A thin-walled shell inner hole support rod device, characterized in that: include: Head fixing block, chain column, slider, center column; The lower end surface of the head fixing block is positioned and connected with the center column, and the lower outer edge of the head fixing block is connected to the upper end of the chain column; the lower end of the column chain is connected to the slider, and the slider is sleeved on the center column; the chain column can be propped up as the slider moves upward and shrinks when it moves downward, and a slot is provided on the chain column to facilitate clamping the edge of the hole on the thin-walled structure.

2. The device according to claim 1, characterized in that The head fixing block, the chain column and the sliding block form a hinge structure.

3. The device according to claim 1, characterized in that The chain column includes an upper chain plate, a pin and a lower chain plate; A pair of lugs are provided at both ends of the upper and lower chain plates; The upper ear piece of the upper chain piece is connected to the lower outer edge of the head fixing block through a pin, and the pin serves as the rotation axis of the upper chain piece; the lower ear piece of the upper chain piece is connected to the upper ear piece of the lower chain piece through a pin to realize the supporting and contraction process of the upper chain piece and the lower chain piece; the lower ear piece of the lower chain piece is connected to the upper end surface of the slider through a pin.

4. The device according to claim 1, characterized in that A laser device is installed on the lower surface of the central column.

5. The device according to claim 1, characterized in that Also includes: A spring sheet disposed on the center column; The spring sheet is located on the center column corresponding to the connection position of the upper and lower chain sheets after the chain column is fully retracted.

6. The device according to claim 1, characterized in that The outer surface of the chain piece is cut with a groove, and the groove is parallel to the inner surface of the chain piece.

7. The device according to claim 4, characterized in that The spring leaf is mounted on the center column through a groove on the center column.

8. The device according to claim 1, characterized in that There are multiple chain columns, and the overall structure needs to be symmetrically distributed to ensure high concentricity.

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