Eccentric pin adjusting device for assisting installation of air inlet channel
By designing an eccentric pin adjustment device that includes a limiting plate, a fixed pin, a pressure plate, and a movable pin, the problem of unclear eccentric pin adjustment in enclosed spaces was solved, achieving rapid and accurate positioning, avoiding assembly damage, and improving production efficiency.
Patent Information
- Application Number
- CN202423067542.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-12
AI Technical Summary
The fit between the eccentric pin and the pin hole cannot be observed in an enclosed space, which leads to unclear adjustment direction of the eccentric pin, resulting in repeated assembly and damage to machine components.
Design an eccentric pin adjustment device including a limiting plate, a fixed pin, a pressure plate, a movable pin, and a fixing bolt. Through the combination of the limiting plate and the movable pin, the eccentric pin can be accurately positioned and matched with the end hole of the machine body structure.
It improves the speed and accuracy of eccentric pin adjustment, avoids friction damage during assembly, increases production efficiency, and meets the needs of assembly adjustment.
Smart Images
Figure CN223617087U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aircraft fuselage component assembly technology, specifically to a device for adjusting eccentric pins in enclosed spaces. Background Technology
[0002] Currently, the intake duct assembly and structural assembly of a certain type of helicopter engine in China are installed using a double eccentric pin and pin hole fit (this part is a high-frequency vibration zone, so it is designed for precision fit). During assembly, it is necessary to fine-tune the eccentric pins on the intake duct assembly to ensure that the two eccentric pins fit properly with the holes on the structural assembly.
[0003] During the assembly of the intake duct assembly, the eccentric pin area is a closed space during the engagement of the intake duct assembly with the structural end. The fit between the eccentric pin and the pin hole cannot be observed, making it impossible to determine the adjustment direction of the eccentric pin. Therefore, a special device is needed to acquire and lock the relative positions of the two pin holes at the structural end, and quickly transfer this positional relationship to the eccentric pin of the intake duct assembly. Utility Model Content
[0004] The purpose of this invention is to solve the adjustment speed of the eccentric pin in the engine intake manifold and avoid damage to machine components caused by repeated assembly due to improper adjustment of the eccentric pin.
[0005] The technical solution of this utility model is:
[0006] An eccentric pin adjustment device for assisting in the installation of an air intake is provided, comprising a limiting plate 21, a fixing pin 5, a pressure plate 23, a movable pin 2, and a fixing bolt 22;
[0007] The limiting plate 21 has a through hole at the left end and an oblong hole at the right end. The two ends of the fixed pin are coaxial pin heads and pin holes, and the two ends of the movable pin are coaxial pin heads and pin holes. The middle of the movable pin is a limiting flange.
[0008] The fixed pin passes through the through hole and is fixed to the through hole; the movable pin passes through the waist-shaped hole and can slide in the waist-shaped hole, and the flange limits the movable pin in the waist-shaped hole; the pin head of the fixed pin and the pin head of the movable pin are both located on one side of the limiting plate, and the pin hole of the fixed pin and the pin hole of the movable pin are both located on the other side of the limiting plate.
[0009] The limiting plate has a threaded hole, and the pressure plate 23 has a through hole. The fixing bolt passes through the through hole of the pressure plate and is threadedly engaged with the threaded hole. The pressure plate and the limiting plate are located on both sides of the flange. Rotating the fixing bolt can cause the pressure plate to press and fix the flange on the limiting plate, thereby fixing the movable pin.
[0010] The pin holes of the fixed pin and the movable pin are adapted to install the eccentric pin 1 of the air intake duct 4. The pin heads of the fixed pin and the movable pin are adapted to the mounting holes at the fuselage structure end. After inserting the pin heads of the fixed pin and the movable pin into the mounting holes at the fuselage structure end, the pressure plate is fixed, which can guide the position between the mounting holes at the fuselage structure end 3. By adjusting the eccentric pin, the eccentric pin can be matched with the pin holes of the fixed pin and the movable pin, thus achieving the matching between the eccentric pin and the mounting holes at the fuselage structure end.
[0011] Furthermore, the pressure plate has a central through hole, and the movable pin passes through the central through hole.
[0012] Furthermore, the number of bolts is multiple.
[0013] Furthermore, the limiting plate is made of aluminum alloy.
[0014] Furthermore, a gasket is provided between the flange and the limiting plate.
[0015] Furthermore, the pin head is a tapered pin head.
[0016] The advantages of this utility model are: 1. This device can realize the function of acquiring, fixing and transferring the relative position between two parallel pin holes, which can meet the needs of auxiliary assembly adjustment and improve production efficiency.
[0017] 2. The precision of the two bidirectional shaft pin assemblies in this device is equal to that of the structural pin holes. This satisfies the assembly and adjustment requirements while solving the collision and friction problem between the intake manifold pin and the pin hole on the machine during the original adjustment process, thus avoiding wear on the pin and pin hole assemblies.
[0018] 3. This device uses high-strength, wear-resistant metal materials and undergoes surface treatment to ensure the durability of the tooling.
[0019] 4. The tooling is lightweight and easy to carry, weighing less than 2KG, making it convenient for large-scale installation and adjustment in the field. Attached Figure Description
[0020] Figure 1 This is a schematic diagram illustrating the use of this utility model;
[0021] Figure 2 A schematic diagram of the installation of an eccentric pin in the air intake duct according to existing technology;
[0022] Figure 3 This is a structural diagram of the movable pin;
[0023] Figure 4 This is a structural sectional view of the movable pin;
[0024] Figure 5This is a structural diagram of the fixing pin;
[0025] Figure 6 This is a structural sectional view of the fixing pin;
[0026] Figure 7 This is a schematic diagram of the structure of this utility model;
[0027] Among them: eccentric pin 1, movable pin 2, fuselage structure end 3, air intake 4, fixed pin 5, limit plate 21, fixing bolt 22, pressure plate 23. Detailed Implementation
[0028] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.
[0029] An eccentric pin adjustment device for assisting in the installation of an air intake is provided, comprising a limiting plate 21, a fixing pin 5, a pressure plate 23, a movable pin 2, and a fixing bolt 22;
[0030] The limiting plate 21 has a through hole at its left end and an oblong hole at its right end. The two ends of the fixed pin are coaxial pin heads and pin holes, respectively. The two ends of the movable pin are coaxial pin heads and pin holes, respectively. The middle of the movable pin is a limiting flange.
[0031] The fixed pin passes through the through hole and is fixed to the through hole; the movable pin passes through the waist-shaped hole and can slide in the waist-shaped hole, and the flange limits the movable pin in the waist-shaped hole; the pin head of the fixed pin and the pin head of the movable pin are both located on one side of the limiting plate, and the pin hole of the fixed pin and the pin hole of the movable pin are both located on the other side of the limiting plate.
[0032] The limiting plate has a threaded hole, and the pressure plate 23 has a through hole. The fixing bolt passes through the through hole of the pressure plate and is threadedly engaged with the threaded hole. The pressure plate and the limiting plate are located on both sides of the flange. Rotating the fixing bolt can cause the pressure plate to press and fix the flange on the limiting plate, thereby fixing the movable pin.
[0033] The pin holes of the fixed pin and the movable pin are adapted to install the eccentric pin 1 of the air intake duct 4. The pin heads of the fixed pin and the movable pin are adapted to the mounting holes at the fuselage structure end. After inserting the pin heads of the fixed pin and the movable pin into the mounting holes at the fuselage structure end, the pressure plate is fixed, which can guide the position between the mounting holes at the fuselage structure end 3. By adjusting the eccentric pin, the eccentric pin can be matched with the pin holes of the fixed pin and the movable pin, thus achieving the matching between the eccentric pin and the mounting holes at the fuselage structure end.
[0034] The pressure plate has a central through hole, and the movable pin passes through the central through hole.
[0035] The bolts are two in number and are arranged symmetrically at the center.
[0036] The limiting plate is made of aluminum alloy.
[0037] A gasket is provided between the flange and the limiting plate.
[0038] The pin is a tapered pin.
[0039] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may describe different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical application of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.
Claims
1. An eccentric pin adjustment device for assisting in the installation of an air intake duct, characterized in that: It includes a limiting plate (21), a fixing pin (5), a pressure plate (23), a movable pin (2), and a fixing bolt (22); The limiting plate (21) has a through hole at its left end and an oblong hole at its right end. The two ends of the fixed pin are coaxial pin heads and pin holes, and the two ends of the movable pin are coaxial pin heads and pin holes. The middle of the movable pin is a limiting flange. The fixed pin passes through the through hole and is fixed to the through hole; the movable pin passes through the waist-shaped hole and can slide in the waist-shaped hole, and the flange limits the movable pin in the waist-shaped hole; the pin head of the fixed pin and the pin head of the movable pin are both located on one side of the limiting plate, and the pin hole of the fixed pin and the pin hole of the movable pin are both located on the other side of the limiting plate. The limiting plate has a threaded hole, the pressure plate (23) has a through hole, the fixing bolt passes through the through hole of the pressure plate and is threadedly engaged with the threaded hole, the pressure plate and the limiting plate are located on both sides of the flange, rotating the fixing bolt can make the pressure plate press and fix the flange on the limiting plate, thereby fixing the movable pin; The pin hole of the fixed pin and the pin hole of the movable pin are adapted to install the eccentric pin (1) of the air intake (4). The pin head of the fixed pin and the pin head of the movable pin are adapted to the mounting hole at the end of the fuselage structure. After inserting the pin head of the fixed pin and the pin head of the movable pin into the mounting hole at the end of the fuselage structure, the pressure plate is fixed, which can guide the position between the mounting holes at the end of the fuselage structure (3). By adjusting the eccentric pin, the eccentric pin can be matched with the pin hole of the fixed pin and the pin hole of the movable pin, so as to achieve the matching between the eccentric pin and the mounting hole at the end of the fuselage structure.
2. The eccentric pin adjustment device for assisting in intake manifold installation as described in claim 1, characterized in that: The pressure plate has a central through hole, and the movable pin passes through the central through hole.
3. The eccentric pin adjustment device for assisting in the installation of an air intake duct as described in claim 1, characterized in that: The number of bolts is multiple.
4. The eccentric pin adjustment device for assisting in intake manifold installation as described in claim 1, characterized in that: The limiting plate is made of aluminum alloy.
5. An eccentric pin adjustment device for assisting in the installation of an air intake duct as described in claim 1, characterized in that: A gasket is provided between the flange and the limiting plate.
6. The eccentric pin adjustment device for assisting in intake manifold installation as described in claim 1, characterized in that: The pin is a tapered pin.