CN113107795A

CN113107795A - Energy collecting device for spiral damping spring

Info

Publication number: CN113107795A
Application number: CN202110415844.2A
Authority: CN
Inventors: 张泉; 刘子玉; 李忠杰; 彭艳; 罗均; 谢少荣; 蒲华燕
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-07-13
Anticipated expiration: 2041-04-19
Also published as: CN113107795B

Abstract

The invention discloses an energy collecting device for a spiral damping spring, which comprises an upper part shell, a lower part shell and a damping spring, wherein a power generation coil is fixed at the bottom of the lower part shell, one end of a rotating shaft is assembled at a thrust bearing, the other end of the rotating shaft is connected with a volute spiral spring, and a permanent magnet positioned above the power generation coil is arranged on the rotating shaft; the outer side of the volute spiral spring is connected with a spring shell, and a ratchet wheel structure on the spring shell is matched with a ratchet ring fixedly connected with the lower part of the shell to form a ratchet wheel capable of rotating in a single direction; a transmission screw rod is arranged at the axis of the upper part shell, one end of the transmission screw rod corresponds to the rotating shaft, and the other end of the transmission screw rod is provided with a stopper; one end of the transmission screw is fixedly connected with the spring shell, a nut is assembled on the transmission screw, a limiting ring is arranged at the lower end of the transmission screw, and the outer ring of the limiting ring is fixed with the bottom end of the upper shell. The structure that adopts and coil spring coaxial arrangement has improved the utilization efficiency of energy, reduces the influence to damping spring simultaneously.

Description

Energy collecting device for spiral damping spring

Technical Field

The invention relates to the technical field of energy collection, in particular to an energy collecting device for a spiral damping spring.

Background

With the continuous development of big data and internet of things, the demand of wireless and self-powered sensors is continuously increasing. In order to monitor the change of a certain parameter for a long time, such as vibration data of bridges, geology, road surfaces and buildings, which are difficult to obtain, the sensors need to be scattered and buried in a large range, and the installation is inconvenient, such as vibration data of bridges, geology, road surfaces and buildings, which needs to distribute and dispose the sensors in a large range, and the energy supply through cables is very difficult. So we need to use self-powered devices. The existing energy collecting device has the problem of low space utilization rate, so that the size of the whole sensor is enlarged, and the practicability of the self-powered sensor is reduced because independent installation space is required for most vibration energy collecting devices. In conclusion, the energy collecting device with high space utilization rate and convenient installation has strong display significance.

Disclosure of Invention

The invention aims to provide an energy collecting device for a spiral damping spring, which solves the problems in the prior art, can effectively utilize the space of the spring damper and is convenient to install.

In order to achieve the purpose, the invention provides the following scheme: the invention provides an energy collecting device for a spiral damping spring, which comprises an upper part shell, a lower part shell and a damping spring, wherein the bottom end of the upper part shell is movably assembled in the lower part shell, and two ends of the damping spring sleeved on the outer sides of the upper part shell and the lower part shell are abutted against an end cover of the upper part shell and an end cover of the lower part shell;

a power generation coil is fixed at the bottom of the lower part shell, a thrust bearing is arranged in the center of the bottom of the lower part shell, one end of a rotating shaft is assembled at the thrust bearing, the other end of the rotating shaft is connected with a volute spiral spring, and a permanent magnet positioned above the power generation coil is installed on the rotating shaft; the outer side of the volute spiral spring is connected with a spring shell, and a ratchet wheel structure on the spring shell is matched with a ratchet ring fixedly connected with the lower part of the shell to form a ratchet wheel capable of rotating in a single direction;

a transmission screw rod is arranged at the axis of the upper part shell, one end of the transmission screw rod corresponds to the rotating shaft, and the other end of the transmission screw rod is provided with a stopper; one end of the transmission screw is fixedly connected with the spring shell, a nut is assembled on the transmission screw, a limiting ring is arranged at the lower end of the transmission screw, and the outer ring of the limiting ring is fixed with the bottom end of the upper shell.

Preferably, the permanent magnet is a plurality of fan-shaped permanent magnets.

Preferably, the rotating shaft is connected with an inner ring of the spiral spring; the outer ring of the spiral spring is connected with the spring shell.

Preferably, the scroll spring is a constant force scroll spring.

Preferably, the rotation shaft is located at an axial position of the lower housing.

Compared with the prior art, the invention has the following beneficial technical effects:

the energy collecting device for the spiral damping spring adopts a structure which is coaxially arranged with the spiral spring, can effectively utilize the available space of the spring damper and is convenient to install. When the damping spring is impacted, the built-in volute spiral spring can temporarily store energy in a mechanical energy mode, the utilization efficiency of the energy is improved, the output voltage characteristic is adjusted, and meanwhile the influence of the device on the spring characteristic of the damping spring is reduced.

Drawings

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

FIG. 1 is a schematic view of the overall structure of an energy harvesting device for a helical damper spring;

FIG. 2 is an internal cross-sectional view of an energy harvesting device for a helical damper spring;

FIG. 3 is an exploded view of an energy harvesting device for a helical-type shock absorbing spring;

wherein, 1 a damping spring; 2 an upper part housing; 3 lower part of the housing; 4, a limiter; 5, a nut; 6, a limiting ring; 7, driving a lead screw; 8 rotating the shaft; 9 a ratchet ring; 10 a spring housing; 11 a volute spiral spring; 12 a power generating coil; 13 a permanent magnet; 14 thrust bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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

As shown in fig. 1-3, the present embodiment provides an energy collecting device for a spiral damping spring, the housing of the device is divided into an upper part and a lower part, and a generating coil 12 is fixed at the bottom of the lower part housing 3 for generating electricity. The permanent magnet 13 is connected with a rotating shaft 8 and is arranged above the generating coil 12, the other end of the rotating shaft 8 is connected with a volute spiral spring 11, the volute spiral spring 11 is connected with the upper outer shell 2 through a device similar to a screw rod drive and is provided with a limiting device, and the volute spiral spring 11 and the screw rod drive nut 5 are connected with the spring outer shell 10 through a ratchet wheel device.

The upper and lower part housings can be nested in the damping spring 1, and the inner diameter of the lower part housing 3 is slightly larger than the outer diameter of the upper part housing 2. The drive nut, which is located inside the housing 2 of the upper part, can move within a certain range of the upper part, allowing the nut 5 to disengage from the toothed structure of the upper part and the toothed groove of the housing. The tooth-shaped structure of the upper part is integrated with the upper part shell 2, and when the tooth-shaped structure of the nut 5 is meshed with the upper part shell 2, the tooth-shaped structure and the upper part shell are connected and can be regarded as an integral body; when the upper housing part 2 is moved upwards, the two are disengaged, allowing the device to be reset from the compressed state. The tooth-like structure has a one-way transmission function, and when the tooth-like structure is rotated to the other direction, the nut 5 is engaged with the spring shell 10, and the transmission direction is opposite to that of the ratchet device.

The axis of the damping device can be used as a through center shaft which does not have any function, and the center shaft can be replaced by a center shaft structure commonly used in damping springs in actual use, so that the weakening of the damping device to the stability of the original damping device is reduced.

When the device is used, the lower part shell 3 and the upper part shell 2 are respectively arranged in the damping spring 1 after the device is assembled. The housing will follow the movements of both ends of the damping spring 1.

The generating coil 12 is fixedly connected with the lower shell 3, a thrust bearing 14 is fixed on the lower shell 3, and a plurality of fan-shaped permanent magnets 13 are fixedly connected on the rotating shaft 8. The rotating shaft 8 is connected with the inner ring of the volute spiral spring 11, the outer ring of the volute spiral spring 11 is connected with the spring shell 10, the ratchet wheel structure on the spring shell 10 is matched with the ratchet ring 9 fixedly connected with the lower portion of the shell to form a ratchet wheel capable of rotating in a single direction, the rotating shaft 8 is not matched with the spring shell 10, and relative rotation can be achieved between the rotating shaft 8 and the spring shell 10. The ratchet 9 is fixed to the lower housing 3 and the spring housing 10 is integral with the ratchet 9, with the effect that the spring case can only be rotated in one direction relative to the housing, so that when the upper screw is rotated, the spring case cannot be rotated in reverse to store energy. The using effect is the same as that of winding. It is conceivable that the lead screw and spring case are wound knobs, the spring connected below stores energy, and the last rotating magnet consumes energy. The spring shell 10 is fixedly connected with a transmission screw 7, the transmission screw 7 and the nut 5 form a screw nut transmission pair, the upper end of the nut 5 can be matched with the same tooth-shaped structure of the upper part shell 2, and the lower end of the nut is prevented from being separated from the upper part shell by a limit ring 6.

The specific dimensions of the above-mentioned components are set according to the length of the damper spring 1. In addition, the nut 5 and the transmission screw 7 do not have a self-locking relationship and can perform bidirectional transmission.

This example is the application occasion of compression damping spring, and when damping spring 1 was compressed, upper portion shell 2 and nut 5 contacted cooperation to drive lead screw 7 and rotate, made spiral spring 11 outer lane rotatory, and the spring inner circle drives rotation axis 8 rotatory simultaneously, and permanent magnet 13 rotates, thereby produces induced electromotive force at electricity generation coil 12. During the return stroke, the upper part shell 2 moves upwards under the thrust of the spring, the nut 5 is separated from the shell and is pushed by the limit ring 6 to return together with the shell to the position set by the limit device 4, and in the process, the nut 5 rotates relative to the upper part shell 2, but the transmission lead screw 7 does not rotate. Thereby completing one duty cycle.

The permanent magnets 13 are arranged in a conventional manner such that N poles and S poles are alternately arranged, the number of the generating coils 12 corresponds to the number of magnetic poles, and the generating coils are disposed on the upper and lower sides of the magnets to maximize the use of space and the permanent magnets. The magnetism isolating component can be properly added according to the use environment so as to reduce the influence of the alternating magnetic field on other devices during power generation.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. An energy harvesting device for a helical damper spring, comprising: the damping device comprises an upper part shell, a lower part shell and a damping spring, wherein the bottom end of the upper part shell is movably assembled in the lower part shell, and two ends of the damping spring sleeved on the outer sides of the upper part shell and the lower part shell are abutted against an end cover of the upper part shell and an end cover of the lower part shell;

2. The energy harvesting device for a helical damping spring according to claim 1, wherein: the permanent magnet is a plurality of fan-shaped permanent magnets.

3. The energy harvesting device for a helical damping spring according to claim 1, wherein: the rotating shaft is connected with the inner ring of the volute spiral spring; the outer ring of the spiral spring is connected with the spring shell.

4. The energy harvesting device for a helical damping spring according to claim 1, wherein: the volute spiral spring is a constant-force volute spiral spring.

5. The energy harvesting device for a helical damping spring according to claim 1, wherein: the rotating shaft is located at the axis position of the lower housing part.