CN210686798U - Scroll spring mechanism with good wear resistance - Google Patents

Abstract

The utility model discloses a volute spiral spring mechanism that wearability is good, include the body of constituteing by a plurality of vortex circles end to end, set up first bending part, the setting in the inner department of body the second bending part of outer department of body, the body certainly first bending part is that eccentric vortex is rolled to extend to the second bending part, first axis that first bending part was located will first this somatic part and second somatic part are separated into to the body, are located adjacent two of first somatic part clearance from interior to exterior grow gradually between the vortex circle is located adjacent two of second somatic part clearance between the vortex circle is approximately equal, be located adjacent two on the body the position coating of vortex contact has self-lubricating graphite layer and/or graphite composite bed. The utility model discloses at least, include following advantage: the eccentric molding structure is adopted, the self-lubricating layer is combined, so that the stress process is uniform, the friction coefficient is effectively reduced, and the fracture probability is further reduced.

Description

Scroll spring mechanism with good wear resistance

Technical Field

The utility model relates to an electric power tech field, it is a volute spiral spring mechanism that wearability is good specifically.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The volute spring is a common mode of a spring and is widely used. The volute spiral spring is generally fixed in two ways, wherein the middle hook of the volute spiral spring is fixed in the using process, and the outer end folding angle is twisted; the other mode is to fix the outer end break angle and twist the center break angle, but no matter which mode is adopted, a phenomenon can occur during twisting, and the center position of the volute spring can deviate under the stress condition.

In general, the wrap springs are in the state shown in fig. 1 in the free state, and this design is acceptable for wrap springs with low life requirement, but often fails to meet the requirement for high life requirement. Due to eccentricity under stress, one sides of the wires can contact and rub with each other, and the worn surfaces are broken; in addition, the fracture is accelerated due to uneven stress.

It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention, and is set forth for facilitating understanding of those skilled in the art. These solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present invention.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect among the prior art, the embodiment of the utility model provides a volute spiral spring mechanism that wearability is good, its setting that adopts eccentric shaping structure, combination self-lubricating layer can make the atress process comparatively even, and effectively reduces the coefficient of friction, and then reduces the probability of rupture.

The embodiment of the application discloses: the utility model provides a scroll spring mechanism that wearability is good, includes the body that comprises a plurality of vortex circles end to end, sets up the first portion of bending of department, the setting at the inner end of body, sets up the second portion of bending of outer end department of body, the body certainly first portion of bending is eccentric vortex and rolls the shape and extend to the second portion of bending, the first axis that first portion of bending was located will the body is separated into first noumenon portion and second noumenon portion, is located adjacent two of first noumenon portion the clearance between the vortex circle is crescent from inside to outside, is located adjacent two of second noumenon portion the clearance between the vortex circle is approximately equal, be located adjacent two on the body the position that the vortex circle contacted is coated with self-lubricating graphite layer and/or graphite composite bed.

Further, the soft rubber is similar to the body in shape and can be attached to the side wall of the body.

Further, the soft rubber is a sheet-shaped body and attached to the side wall of the body far away from the first bending part.

Further, the edge of the soft rubber is formed with a bent portion capable of being hung on the end of the side wall of the body.

Furthermore, the bending part and the end part of the side wall of the body adopt an interference fit connection mode.

Furthermore, a plurality of convex parts which are convex outwards and can bear stress are arranged on the soft rubber, and the convex parts are arranged in a wavy manner.

Further, the hook comprises a ring-shaped part which is arranged on the first bending part and used for hanging the hook, and the ring-shaped part is formed by bending the end part of the first bending part.

Furthermore, the annular part is integrally in a shuttle shape with a hollow-out cavity.

Borrow by above technical scheme, the beneficial effects of the utility model are as follows:

1. in the application, through the arrangement of the first body part and the second body part, when the first body part of the body is in an unstressed state, the first body part of the body is in an eccentric shape; when the body is in a stressed state, one side with a large gap can be extruded towards one side with a small gap, namely the first body part can be extruded towards the second body part, so that the body can be stressed uniformly in the stress process; due to the arrangement of the gap, the contact probability between the scroll and the volute can be reduced in the extrusion process, and the friction probability and the stress concentration probability can be effectively reduced;

2. this application is through the setting of the graphite layer of the self-lubricating of setting and/or graphite composite bed, and the self-lubricating layer can form one deck solid lubrication film and play the lubrication action on the surface at the in-process of friction. The graphite layer and/or the graphite composite layer have better softness, and the wear resistance can be improved by reducing friction factors; above-mentioned volute is at the extruded in-process, even the phenomenon that appears contacting, also can reduce coefficient of friction effectively through the setting of self-lubricating layer, and then reduces cracked probability.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a prior art overall structure;

fig. 2 is a schematic structural diagram of an overall device in an embodiment of the present invention;

fig. 3 is a cross-sectional view of a body in an embodiment of the invention;

FIG. 4 is a schematic view of the overall device structure with soft rubber of the present invention;

FIG. 5 is a schematic view of the soft rubber flat-laying structure of the present invention;

fig. 6 is a schematic view of the overall device structure having the ring portion according to the present invention.

Reference numerals of the above figures: 1. a body; 2. a first bending portion; 3. a second bending portion; 4. a gap; 5. a self-lubricating graphite layer; 6. soft rubber; 7. a boss portion; 8. an annular portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is shown between the two, and no indication or suggestion of relative importance is understood. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 2 and 3, the present embodiment discloses a volute spiral spring mechanism with good wear resistance, which includes a body 1 formed by connecting a plurality of volute coils end to end, a first bending portion 2 disposed at an inner end of the body 1, and a second bending portion 3 disposed at an outer end of the body 1. Body 1 certainly first portion of bending 2 is that eccentric vortex extends to the portion 3 is bent to the second, the first axis that first portion of bending 2 located will body 1 is separated into first body 1 portion and second body 1 portion, is located adjacent two of first body 1 portion clearance 4 from interior to exterior between the vortex circle grow gradually, is located adjacent two of second body 1 portion clearance 4 between the vortex circle is approximately equal. The self-lubricating graphite layer 5 and/or a graphite composite layer are coated on the contact part of two adjacent scrolls on the body 1.

In the above arrangement, when the body 1 is in a non-stressed state, the first body 1 portion of the body 1 is eccentric; when the body is in a stressed state, one side with a large gap 4 can be extruded towards one side with a small gap 4, namely the first body 1 can be extruded towards the second body 1, so that the body 1 can be stressed uniformly in the stress process; and because the setting of clearance 4 can reduce the contact probability between vortex and the vortex at the in-process of extrusion, and then can reduce friction probability and stress concentration probability effectively.

In the aforesaid setting mode, through the setting of the graphite layer and/or the graphite composite bed of self-lubricating, the in-process of self-lubricating layer at friction can form one deck solid lubrication film and play the lubrication action on the surface. And the graphite layer and/or the graphite composite layer have better softness, and can increase the wear resistance by reducing friction factors. Above-mentioned volute is at the extruded in-process, even the phenomenon that appears contacting, also can reduce coefficient of friction effectively through the setting of self-lubricating layer, and then reduces cracked probability.

In this embodiment, the first bending portion 2 and the second bending portion 3 are both replaced by long strips, and the first bending portion 2 and the second bending portion 3 may be integrally formed with the body 1, or may be fixedly connected to the body 1 by a connection method such as welding. Preferably, the first bending portion 2 extends vertically upward from the inner end of the body 1, and the second bending portion 3 extends vertically downward from the outer end of the body 1.

As shown in fig. 4, the spiral spring mechanism includes a soft rubber 6 having a shape similar to the body 1 and capable of being attached to a side wall of the body 1. Specifically, soft rubber 6 is the platelike body, and attached keeping away from on the body 1 the lateral wall of first portion 2 that bends, just soft rubber 6's edge portion is formed with and can hangs the portion of bending of the lateral wall tip of body 1. In the installation process, firstly, the body 1 of the volute spring is horizontally placed, the starting end of the soft rubber 6 is fixedly arranged at the inner end of the body 1 in a manual or automatic mode, and the soft rubber 6 is gradually attached to the side wall of the body 1 in a spiral winding mode. Preferably, the bending part and the end part of the side wall of the body 1 adopt an interference fit connection mode. In the winding process, the soft rubber 6 is fixed relative to the body 1 by directly buckling the bent part on the end part of the side wall of the body 1. The arrangement mode can effectively reduce the introduction of connecting pieces such as glue, screws and the like, and the installation and the disassembly are convenient. Meanwhile, the soft rubber 6 can effectively play a good noise reduction function.

As shown in fig. 5, the soft rubber 6 is provided with a plurality of protrusions 7 protruding outward to bear stress, and the plurality of protrusions 7 are arranged in a wave shape. In the arrangement mode, when the body 1 is stressed to deform and two adjacent scrolls are in contact, the protruding parts 7 corresponding to the scrolls can be in contact with the scrolls in advance, and the arrangement mode is wavy, so that the phenomenon of stress concentration can be effectively reduced, and the probability of breakage of the scrolls is further reduced.

As shown in fig. 6, the coil spring mechanism further includes a ring-shaped portion 8 provided on the first bent portion 2 for hanging the hook, and the ring-shaped portion 8 is formed by bending an end portion of the first bent portion 2. Preferably, the annular portion 8 is shaped like a shuttle with a hollow cavity. In the above-described arrangement, in order to achieve a preferable taking operation in the process of carrying or sorting, the scroll spring mechanism is suspended from the external hook by the annular portion 8, and the above-described operation requirement can be achieved.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (8)

1. The scroll spring mechanism is characterized by comprising a body, a first bending part and a second bending part, wherein the body is formed by connecting a plurality of scrolls end to end, the first bending part is arranged at the inner end of the body, the second bending part is arranged at the outer end of the body, the body extends to the second bending part in an eccentric scroll mode from the first bending part, a first axis where the first bending part is located divides the body into a first body part and a second body part, a gap between two adjacent scrolls positioned on the first body part is gradually enlarged from inside to outside, the gap between two adjacent scrolls positioned on the second body part is approximately equal, and self-lubricating graphite layers and/or graphite composite layers are coated on the contact parts of the two adjacent scrolls on the body.

2. The well-wearable volute spiral spring mechanism of claim 1, comprising a soft rubber having a shape similar to the body and capable of adhering to the side wall of the body.

3. The well-wearable volute spiral spring mechanism of claim 2, wherein the soft rubber is in the form of a sheet and is attached to a side wall of the body away from the first bending portion.

4. The scroll spring mechanism having high wear resistance as claimed in claim 2, wherein a bent portion capable of being hung from an end portion of the side wall of the body is formed at an edge portion of the soft rubber.

5. The well-wearable volute spiral spring mechanism of claim 4, wherein the bending portion is connected with the end portion of the side wall of the body in an interference fit manner.

6. The well-wearable spiral spring mechanism as claimed in claim 2, wherein the soft rubber is provided with a plurality of protrusions protruding outward to bear stress, and the plurality of protrusions are arranged in a wave shape.

7. The abrasion-resistant spiral spring mechanism according to claim 1, further comprising a ring portion provided on the first bent portion for hanging the hook, the ring portion being formed by bending an end portion of the first bent portion.

8. The wear resistant volute spiral spring mechanism of claim 7, wherein the annular portion is generally in the shape of a shuttle having a hollow bore.

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