CN201818683U

CN201818683U - Arc-shaped spring

Info

Publication number: CN201818683U
Application number: CN2010201174883U
Authority: CN
Inventors: 张涌森
Original assignee: QIANJIANG SPRING (BEIJING) CO Ltd
Current assignee: QIANJIANG SPRING (BEIJING) CO Ltd
Priority date: 2010-02-24
Filing date: 2010-02-24
Publication date: 2011-05-04
Anticipated expiration: 2020-02-24

Abstract

The utility model relates to an arc-shaped spring, which solves the problem that the arc-shaped spring of the prior art is formed by connecting a small section of straight spring with a cross connector and the cross connector is abraded and aged easily, the central line of the spring is in an arc shape, and the inner pitch formed by the natural bending of the spring is smaller than the outer pitch. The central line of the spring is in the arc shape, the inner pitch of the spring is smaller than the outer pitch, and the bending shape of the spring is identical to a channel for placing the spring, so distortion force can not be produced when the spring is contracted, and simultaneously the power loss is reduced.

Description

Arc spring

Technical field

The utility model relates to a kind of spring, especially a kind of spring of arc.

Background technique

Spring uses very extensive in machinery, some occasions paralysis part that is absolutely necessary, but spring is of a great variety, structure also has nothing in common with each other, therefore cause function also to have variation, and some special occasion also needs the spring of speciality, do not have versatility between some spring.If the spring that replaces special occasions to use with other spring, can there be variety of issue, such as automobile torque converter, inside has the passage of arc, to place spring in the passage, method commonly used is that the connecting head with cross structure between the straight spring of some segments is connected into arc, the cross connecting head generally uses rubber to make, in use because the erosion of wearing and tearing and environment, especially You existence, the easily aging or distortion of rubber can not be satisfied usage requirement after causing straight spring splicing, therefore just needs a kind of spring of arc of special use.

Patent Office of the People's Republic of China in February 27 in 2008 body announced a CN201027874Y patent, the name be called arched spring in use for hydraulic torque converter of car, the cylindrical element of arc spring is a camber line, the flour milling angle of arc spring is 29.5 ° ± 0.5 °, radius of arc is 58mm.This arc spring is just done camber in the position of cylindrical, but the interior circle of spring is unqualified, has reducing after the spring bending or has distortion power, causes power loss so in the course of the work easily.

Summary of the invention

It is to connect the cross connecting head by the straight spring of segment to be spliced that the utility model has solved in the prior art arc spring, and the cross connecting head weares and teares easily, aging shortcoming, and a kind of integrated arc spring is provided.

The utility model has solved also that in use there is distortion power in arc spring in the prior art, causes the shortcoming of power loss easily, and the center line that a kind of spring is provided is an arc, and the plain and interior round element of cylindrical is an arc all, is not easy the arc spring of wasted power.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of arc spring, the center line of spring are arc, and the interior pitch that the spring natural torsion forms is less than outer pitch.Spring is one-body molded, integral body is warp architecture, the center line of spring is that arc and the shape of placing the passage of spring match, the radian of arc and the radian of passage match, the interior pitch of spring bending guarantees the spring natural torsion less than outer pitch, and the arc of natural torsion is exactly the arc of passage, and interior pitch also meets the variation characteristic of concentric circle radian less than outer pitch, therefore in use distortion power can not occur, alleviate the extraneoas loss of power yet.

As preferably, the two ends of spring circle is also tight and polish the center line of the end face uprighting spring end that polishes.Arc spring is in work, the end of spring is a surface of contact, perhaps stress surface, the both ends of the spring circle polishes and forms smooth end face, end face is perpendicular with herein spring center line, and the active force after making end face stressed guarantees when spring is compressed it is for normal state like this along the tangent direction of center line herein, can be toward the limit upper deflecting, thus power loss alleviated.

As preferably, the number of turns that bearing coil polishes shared spring is the 1/2-4/5 circle.The shared angle of the end circle that polishes designs according to concrete size requirement, because spring is screw type, and tight end circle can play support simultaneously, and therefore the number of turns that polishes is the 1/2-4/5 circle; Sometimes, because the requirement of using changes, the number of turns that spring polishes may occupy whole bearing coil.

As preferably, the bracing ring of both ends of the spring portion is the 1-2.5 circle.After spring is also tight, the bracing ring of spring is exactly the circle circle just second from the bottom of bearing coil the inside, the stressed back of bearing coil pressure spring, because spring is a screw type, therefore bracing ring just can support the end circle of spring, while transfer function power, spring is whole stressed even, and anti-not-go-end circle local location is stressed excessive.

As preferably, the spring wherein diameter of an end circle is less than or equal to the diameter of spring main body, and the maximum value of two diameter differences is 0.4mm.Variation between the diameter of bearing coil and the spring main diameter if make bearing coil have expansion in stressed back, also can not exceed the passage of spring, can not cause clamping stagnation.

As preferably, the maximal clearance error of the interior pitch between spring centre circle and the circle is 0.3mm.Gap error between the strict control pitch, when preventing length of spring compressed, local is stressed excessive.

As preferably, the center line of spring is c-shaped or be circular arc.The shape of spring can also be other shapes, changes according to the variation of the concrete Environmental Conditions of spring.

The beneficial effects of the utility model are: the center line of spring is an arc, and the interior pitch of spring is less than outer pitch, and the spring bending shape matches with the passage of placing spring, can not produce distortion power when spring shrinks, reduces power loss simultaneously.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is a kind of plan view of the utility model;

Fig. 3 is the wherein structural representation of an end of the utility model;

Fig. 4 is the structural representation of the utility model the other end;

Among the figure: 1, spring main body, 2, center line, 3, the right-hand member circle, 4, the left end circle, 5, outer pitch, 6, interior pitch, 7, edging, 8, bracing ring.

Embodiment

Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment: a kind of arc spring (referring to accompanying drawing 1 accompanying drawing 2), the center line 2 of spring is a circular arc, spring main body 1 is that round steel forms around the center line helical buckling, the central angle of the circular arc that spring main body 1 is shared is, the interior pitch 6 that spring main body 1 is bent to form less than outer pitch 5(referring to accompanying drawing 3 accompanying drawings 4), the two ends of spring are enclosed also tight and are polished, the number of turns that center line 2 bearing coils of the end face uprighting spring end that polishes polish shared spring is 3/4 circle, bearing coil inside is 1.5 circle bracing rings 8, bracing ring 8 and end circle and tight, the edge of spring left end circle 4 is provided with 1mmX45 ° edging 7, the diameter of the right-hand member circle 3 of spring is less than the diameter of spring main body 1, the diameter difference is 0.3mm, and the gap error in the spring between the interior pitch 6 is 0.2mm.

Above-described embodiment is a kind of preferred version of the present utility model, is not the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technological scheme that claim puts down in writing.

Claims

1. arc spring, the center line that it is characterized in that spring is an arc, the interior pitch that the spring natural torsion forms is less than outer pitch.

2. arc spring according to claim 1 is characterized in that the two ends circle of spring and tight and polish the center line of the end face uprighting spring end that polishes.

3. arc spring according to claim 2 is characterized in that the number of turns that bearing coil polishes shared spring is the 1/2-4/5 circle.

4. arc spring according to claim 1, the bracing ring that it is characterized in that both ends of the spring portion are the 1-2.5 circle.

5. according to claim 1 or 2 or 3 or 4 described arc springs, it is characterized in that spring wherein the diameter of an end circle be less than or equal to the diameter of spring main body, the maximum value of two diameter differences is 0.4mm.

6. according to claim 1 or 2 or 3 or 4 described arc springs, it is characterized in that the maximal clearance error of the interior pitch between spring centre circle and the circle is 0.3mm.

7. according to claim 1 or 2 or 3 or 4 described arc springs, it is characterized in that the center line of spring is c-shaped or be circular arc.