CN210715693U

CN210715693U - Extension spring assembly

Info

Publication number: CN210715693U
Application number: CN201921340720.7U
Authority: CN
Inventors: 王晓花; 孙江同; 周孟申
Original assignee: Xian Aircraft Industry Group Co Ltd
Current assignee: Xian Aircraft Industry Group Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-06-09
Anticipated expiration: 2029-08-16

Abstract

The utility model provides an extension spring subassembly, contains the isokinetic spring of even number and connects two rocking arms at isokinetic spring both ends, and wherein half spring of quantity is left-handed spring, and the spring of half quantity is right-handed spring, two rocking arms each other be symmetrical structure, the center of every rocking arm is equipped with the spring subassembly connecting hole, is equipped with the spring pilot hole around this connecting hole in the outside symmetry of rocking arm, and the both ends of left-handed spring and right-handed spring alternate connection respectively form the extension spring subassembly in the pilot hole of two rocking arms.

Description

Extension spring assembly

Technical Field

This patent relates to machinery extension spring technique, specifically is an extension spring subassembly.

Background

At present, the extension spring is mostly a single spring, and spring wires at two ends are bent into an arc shape and are connected with other parts through arc-shaped parts. When a large pulling force needs to be generated, a thick spring steel wire needs to be selected, the diameter of the spring also has to be large, the occupied space of the spring is large, and the processing difficulty is large when the spring is wound. When large pulling force is needed in a narrow space, a single extension spring cannot meet the requirements of space and force value at the same time, and higher requirements are provided for spring manufacturing. Particularly, when an airplane is designed and manufactured, a spring with a large tensile force is often needed and is limited by the space of the airplane, and a technical problem in designing the spring is how to increase the elastic force of the spring as much as possible and reduce the volume of the spring as much as possible.

Disclosure of Invention

The utility model aims at providing an extension spring subassembly, the minor diameter spring of being wound by the finer spring wire of even number is parallelly connected to provide great pulling force.

The utility model provides an extension spring subassembly, its characterized in that contains an even number isokinetic spring and connects two rocking arms at isokinetic spring both ends, and wherein half spring of quantity is left-handed spring, and the spring of half quantity is right-handed spring, two rocking arms each other be symmetrical structure, the center of every rocking arm is equipped with the spring subassembly connecting hole, is equipped with the spring assembly hole around this connecting hole outside symmetry of rocking arm, and the both ends of left-handed spring and right-handed spring are alternate respectively in the pilot hole of two rocking arms, form the extension spring subassembly.

The rocker arm center be equipped with spring unit's connecting hole, be equipped with the spring pilot hole of symmetry respectively in the both sides of connecting hole, there is the straightway at the both ends of every spring, is equipped with connecting thread on the straightway, the both ends of every spring are fixed on the spring pilot hole of rocker arm through self-locking nut respectively, form extension spring unit spare.

The hole axis direction of the spring assembly connecting hole of the rocker arm and the hole axis direction of the spring assembly hole can be perpendicular to each other or parallel to each other.

The beneficial effect of this application lies in: 1) this patent adopts extension spring parallel mode, and spring unit can provide bigger pulling force. 2) Under the condition that this patent spring unit provided same elasticity, the extension spring size that needs was littleer, the spring steel wire is thinner, reduces the manufacturing degree of difficulty of spring. 3) The spring passes behind the through-hole of rocking arm both sides and connects both with gasket and self-locking nut among this patent spring unit, and it is simple and convenient to change the spring. 4) The rocker arm center is provided with the spring unit connecting hole among this patent spring unit, and spring unit passes through the connecting hole to be connected with other spare parts, connects reliably, and spring unit dismantles the convenience. 5) Spring is the same except that turning to other parameters outward in this patent spring unit, and half of spring is the levogyration, and half is the dextrorotation, and levogyration spring and dextrorotation spring alternate distribution to guarantee the stability of spring during operation. 6) The design of spring both ends has straightway and screw thread among this patent spring unit, and when spring length differed, the parallel of two rocking arms is guaranteed to the position of adjustable self-locking nut on the screw thread, and the length requirement to every spring is not high, reduces the spring processing degree of difficulty.

The present application is described in further detail below with reference to the accompanying drawings of embodiments.

Drawings

Fig. 1 is a schematic diagram of an extension spring assembly comprising two constant force springs.

Fig. 2 is a schematic view of the spring structure of fig. 1.

Fig. 3 is a schematic view of the rocker arm structure of fig. 1.

Fig. 4 is a schematic diagram of an extension spring assembly containing four constant force springs.

Fig. 5 is a schematic diagram of an extension spring assembly containing six constant force springs.

The numbering in the figures illustrates: the self-locking mechanism comprises a left-handed spring 1, a right-handed spring 2, a rocker arm 3, a self-locking nut 4, a connecting hole 5, a straight line segment 6, a thread 7 and an assembling hole 8.

Detailed Description

Referring to the attached drawings, the tension spring assembly comprises an even number of constant force springs and two rocker arms 3 connected to two ends of the constant force springs, wherein one half of the constant force springs are left-handed springs 1, the other half of the constant force springs are right-handed springs 2, the two rocker arms 3 are of a symmetrical structure, a spring assembly connecting hole 5 is formed in the center of each rocker arm 3, spring assembly holes 8 are symmetrically formed in the outer sides of the rocker arms around the connecting hole 5, and two ends of each left-handed spring 1 and each right-handed spring 2 are connected to assembly holes 8 of the two rocker arms 3 at intervals through self-locking nuts 4 respectively to form the tension spring assembly.

The two ends of the constant force springs are provided with straight line sections 6, the straight line sections 6 are provided with connecting threads 7, and the two ends of each constant force spring are fixed on the spring assembly holes of the rocker arm through self-locking nuts respectively to form an extension spring assembly.

The hole axis direction of the spring assembly connecting hole 5 of the rocker arm and the hole axis direction of the spring assembly hole 8 can be perpendicular to each other or parallel to each other.

The equal force springs making up each extension spring assembly must be an even number and may be two, as shown in fig. 1, four, as shown in fig. 4, or six, as shown in fig. 5. All the constant force springs are connected in parallel between the rocker arms at the two ends. Half of all the constant force springs are left-handed springs and the other half are right-handed springs. The left-handed springs and the right-handed springs are arranged alternately.

Claims

1. The utility model provides an extension spring subassembly, its characterized in that contains an even number isokinetic spring and connects two rocking arms at isokinetic spring both ends, and wherein half spring of quantity is left-handed spring, and the spring of half quantity is right-handed spring, two rocking arms each other be symmetrical structure, the center of every rocking arm is equipped with the spring subassembly connecting hole, is equipped with the spring assembly hole around this connecting hole outside symmetry of rocking arm, and the both ends of left-handed spring and right-handed spring are alternate respectively in the pilot hole of two rocking arms, form the extension spring subassembly.

2. The tension spring assembly as claimed in claim 1, wherein the rocker arm is centrally provided with a connecting hole of the spring assembly, symmetrical spring assembly holes are respectively formed at both sides of the connecting hole, both ends of each spring are provided with straight segments, the straight segments are provided with connecting threads, and both ends of each spring are respectively fixed on the spring assembly holes of the rocker arm by self-locking nuts to form the tension spring assembly.

3. The extension spring assembly of claim 1 or 2, wherein the straight section of the spring passes through the through holes on both sides of the rocker arm and is connected with a gasket and a self-locking nut.

4. The extension spring assembly of claim 3, wherein a hole axis direction of the spring assembly attachment hole of the rocker arm is perpendicular to a hole axis direction of the spring assembly hole.

5. The extension spring assembly of claim 3, wherein a hole axis direction of the spring assembly attachment hole of the rocker arm is parallel to a hole axis direction of the spring assembly hole.