CN-121973924-A - High-bearing integrated sliding rail sliding retraction device

CN121973924ACN 121973924 ACN121973924 ACN 121973924ACN-121973924-A

Abstract

The invention provides a high-bearing integrated sliding rail sliding retraction device which comprises two integrated sliding rail assemblies (32), two front pulley assemblies (30) and two rear pulley assemblies (31), wherein the integrated sliding rail assemblies (32) comprise a main sliding rail (41), an upper sliding rail cover plate (42) and a lower sliding rail cover plate (44), the upper sliding rail cover plate (42) and the lower sliding rail cover plate (44) are arranged on two sides of the main sliding rail (41), the pulley assemblies comprise a door body joint, a steering frame, small vertical wheels, large vertical wheels and transverse wheels, the door body joint is connected with the steering frame in a three-lug double-lug mode, one transverse wheel, two small vertical wheels and two large vertical wheels are arranged on the steering frame, the two large vertical wheels are arranged in the main sliding rail (41), the small vertical wheels of the front pulley assemblies (30) are arranged on the upper sliding rail cover plate (42), and the small vertical wheels of the rear pulley assemblies (31) are arranged on the lower sliding rail cover plate (44). Meeting the requirements of functions, space and economy.

Inventors

DU HANG
ZHENG GUOPENG
CHANG CHENG
PENG HAIFENG
WANG XIN
LI CHENGXING
XI JIASHENG
ZHAN WEIDONG
ZOU MENG

Assignees

中国直升机设计研究所

Dates

Publication Date: 20260505
Application Date: 20251209

Claims (8)

1. The high-bearing integrated sliding rail sliding retraction device is characterized by comprising two integrated sliding rail assemblies (32), two front pulley assemblies (30) and two rear pulley assemblies (31) which are symmetrically arranged; the integrated sliding rail assembly (32) comprises a main sliding rail (41) with a U-shaped section, a sliding rail upper cover plate (42) with a Z-shaped section and a sliding rail lower cover plate (44) with a C-shaped section; The upper slide rail cover plate (42) and the lower slide rail cover plate (44) are arranged on two sides of the main slide rail (41); The pulley assemblies comprise a door body joint, a steering frame, small vertical wheels, large vertical wheels and transverse wheels, wherein the door body joint is connected with the steering frame in a three-lug double-lug mode, one transverse wheel, two small vertical wheels and two large vertical wheels are arranged on the steering frame, the two large vertical wheels are arranged in a main sliding rail (41) in a sliding mode, and the transverse wheels are arranged between the two large vertical wheels; One surface of a transverse wheel of the front pulley assembly (30) is contacted with the bottom of the main sliding rail (41), and the other surface is contacted with a flanging of the upper cover plate (42) of the sliding rail; One surface of a transverse wheel of the rear pulley assembly (31) is contacted with the bottom of the lower cover plate (44) of the sliding rail, and the other surface is contacted with the flanging of the lower cover plate (44) of the sliding rail; The small vertical wheel of the front pulley assembly (30) is arranged on the upper cover plate (42) of the sliding rail in a sliding way, and the small vertical wheel of the rear pulley assembly (31) is arranged on the lower cover plate (44) of the sliding rail in a sliding way.
2. The high-bearing integrated slide rail sliding retraction device according to claim 1 wherein the door body joint has three tab features, the middle tab inner bore diameter being larger than the joint flat head axis (57), the outer two tab inner bores each being fitted with a door body joint bushing (58); The bogie has a double lug feature, the lug bores are each fitted with a knuckle bearing (60) to ensure mounting coaxiality and balance the additional bending moment transmitted at the pulleys.
3. The high-bearing integrated sliding rail sliding retraction device according to claim 1 is characterized in that a large vertical wheel is connected with a bogie through a needle bearing (51) and a large vertical wheel flat head shaft (49), and is circumferentially limited by a large vertical wheel locking pin (54), and a small cotter pin (56) is arranged at the tail end of the large vertical wheel locking pin (54).
4. The high-bearing integrated sliding rail sliding retraction device according to claim 1 wherein the small vertical wheel (33) is directly connected with the bogie through a small vertical wheel flat head shaft (48) and is circumferentially limited by a small vertical wheel locking pin (53), and a small cotter pin (56) is arranged at the tail end of the small vertical wheel locking pin (53).
5. The high-bearing integrated sliding rail sliding retraction device according to claim 1 is characterized in that the transverse wheel is connected with the bogie through a ball bearing (52) and a transverse wheel flat head shaft (50), and is circumferentially limited by adopting a transverse wheel locking pin (55), and a small cotter pin (56) is arranged at the tail end of the transverse wheel locking pin (55).
6. The high-bearing integrated slide rail sliding retraction device according to claim 1 wherein the main slide rail (41) is provided with a converging inlet of the rear pulley assembly (31); A small platform is arranged at a position corresponding to the converging inlet of the sliding rail upper cover plate (42), and the height of the small platform is delta; The gap between the small vertical wheel on the front bogie (37) and the contact surface of the sliding rail upper cover plate (42) except the small platform position is delta 1 ; The gap between the large vertical wheel on the front bogie (37) and the upper surface of the main sliding rail (41) except for the small platform position is delta 2 ; δ 2 ＞δ-δ 1 。
7. The high-bearing-capacity integrated slide rail sliding retraction device according to claim 6 wherein the main slide rail (41) is provided with a slope at the end in front of the inlet, the slope angle being alpha, the range of alpha being 2-4 degrees.
8. The high-load-bearing integrated slide rail sliding retraction device according to claim 6 wherein the small platform extends forward along the slope of the inlet of the main slide rail (41) for a length L 1 and extends rearward along the end of the inlet of the main slide rail (41) for a length L 2 ; L 1 =L 2 =(D 1 +D 2 )/2; Wherein, D 1 is the wheelbase between two small vertical wheels, and D 2 is the wheelbase between two large vertical wheels.

Description

High-bearing integrated sliding rail sliding retraction device Technical Field The invention belongs to the technical field of aircraft structural design, and particularly relates to a high-bearing integrated sliding rail sliding retraction device. Background In the aircraft structural design field, for satisfying the functional demands such as personnel business turn over, cargo transportation, equipment maintenance, weapon deployment, often need the belly department to provide large-size opening to can close the opening through the winding and unwinding devices, thereby effectively isolated cabin outside adverse circumstances, keep the organism appearance simultaneously. Because of the pressure difference between the inside and the outside of the engine room, the retraction device can bear huge pneumatic impact at the moment of opening, and under the extreme conditions of emergency landing and the like, the retraction device also needs to bear load generated by overload, machine body deformation and even part of structural damage, and the larger the size of the machine body opening is, the higher the requirement on the carrying capacity of the retraction device is. In addition to the carrying capacity, space utilization and dimensional coordination are also important for the design of the retraction device. Common retraction devices include sliding retraction devices, link retraction devices, and the like, which can save space required for swinging outward or inward as compared to other configurations. The design of traditional slip receive and release device is as shown in fig. 1, a bogie has been respectively arranged in door body four corners, the bogie adopts single ears cooperation with door body joint, the pulley passes through the crew cut axle and ball bearing installs on the bogie, vertical wheel bears Z to the load, the transverse wheel bears Y to the load, four slide rails are relative door body symmetry, the unilateral is staggered and the front end is crooked mutually, before the door body is opened, the slide rail bending part is all arranged in to the front and back assembly pulley, when the door body is opened, the front and back assembly pulley moves to the inboard and the rear side of fuselage along the slide rail simultaneously. Practical application and experiments show that the traditional design has the following defects that 1) the bearing capacity is limited, the ball bearing is not suitable for high bearing requirements under special working conditions, indentation is easy to generate under the action of high load, vibration and noise are caused during operation, material peeling can occur on the surface of the bearing after continuous working, and finally bearing locking is caused, 2) the single-lug joint of the bogie is required to bear additional bending moment transmitted by a pulley, damage such as hole edge abrasion, lug bending and the like can occur after long-term use, clamping failure is caused, 3) double-slide rail configuration arranged in a staggered manner from top to bottom occupies large space, is easy to be constrained by a machine body structure, and can cause large difference in size and poor coordination of the front and rear bogie joints, 4) the traditional slide rail has complex cross section form, a milling cutter is required to be customized during machining, the cost is high, and meanwhile, the space is reserved for screw installation, and the cross section size is large, so that the weight cost is high. Disclosure of Invention The invention aims to provide the high-bearing integrated sliding rail sliding retraction device which meets the requirements of functions, space and economy. The invention provides a high-bearing integrated sliding rail sliding retraction device which comprises two integrated sliding rail assemblies 32, two front pulley assemblies 30 and two rear pulley assemblies 31 which are symmetrically arranged; The integrated slide rail assembly 32 comprises a main slide rail 41 with a U-shaped cross section, a slide rail upper cover plate 42 with a Z-shaped cross section and a slide rail lower cover plate 44 with a C-shaped cross section; the slide rail upper cover plate 42 and the slide rail lower cover plate 44 are arranged on two sides of the main slide rail 41; The pulley assemblies comprise a door body joint, a steering frame, small vertical wheels, large vertical wheels and transverse wheels, wherein the door body joint is connected with the steering frame in a three-lug double-lug mode, one transverse wheel, two small vertical wheels and two large vertical wheels are arranged on the steering frame, the two large vertical wheels are arranged in a main sliding rail 41 in a sliding mode, and the transverse wheels are arranged between the two large vertical wheels; One surface of a transverse wheel of the front pulley assembly 30 is contacted with the bottom of the main sliding rail 41, and the other surface is contacted with the flanging