CN110905910A

CN110905910A - Power-assisted shaft

Info

Publication number: CN110905910A
Application number: CN201911356265.4A
Authority: CN
Inventors: 金忠成
Original assignee: Xiamen Jiahexi Creative Design Co Ltd
Current assignee: Guli Xiamen Technology Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-03-24

Abstract

The invention discloses a power-assisted shaft, which comprises: a rotating shaft, a connecting shaft and a torsion spring; a large shaft section is arranged in the middle of the connecting shaft, and small shaft sections are arranged at two ends of the connecting shaft; the two rotating shafts are respectively and rotatably arranged on the small shaft sections at two sides of the connecting shaft; the torsion spring is coaxially arranged on the large shaft section and positioned between the two rotating shafts, and two ends of the torsion spring are respectively and fixedly arranged on the rotating shafts on two sides; the power-assisted shaft can serve as a hinge to fixedly connect the body and the cover plate and can provide power assistance to enable the cover plate to be labor-saving in the opening process.

Description

Power-assisted shaft

Technical Field

The invention relates to a mechanical structure, in particular to a power-assisted shaft.

Background

Have many article in the life to set up the lid, be connected through the hinge mechanism between lid and the body, its effect has: the garbage can is used for packaging, preventing dust, preventing moisture, preventing odor and the like for the articles in the garbage can, for example, the garbage can is provided with a garbage can cover so as to prevent the garbage in the garbage can from emitting odor; the piano is provided with a key cover plate so as to prevent dust from entering the piano keys to influence tone; the toilet is provided with a cover plate in order to prevent the odor inside from being emitted to the air. People have among the prior art to consider that a lot of apron can cause very big sound because bulky, heavy in weight at the in-process that falls to and fall rapidly and have the risk of pressing from both sides hindering, consequently installed the attenuator on the hinge, the attenuator has the damping effect, makes the apron can not fall fast, reaches silence and safe effect, but the attenuator has only solved the safety problem that the apron falls, but can't solve the apron and lift hard problem. The hinge is installed on the hinge through the torsional spring in a pre-tightening mode in the prior art, the cover plate is fastened at one end, the body is fastened at one end, the torsional spring is exposed, the appearance is rough and not attractive, the torsional spring is easy to rust in the air and influences the service life of the torsional spring, the torsional spring is inconvenient to install, and the powerful elasticity of the torsional spring has certain danger, so that the specially designed rotating shaft capable of assisting power is very important, the rotating shaft can be applied to a heavy cover plate, such as a cover plate of a large garbage can, or a piano key cover plate, or a toilet cover plate made of urea-formaldehyde materials, and people can save labor when opening the cover plate.

Disclosure of Invention

The technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the prior art. The power-assisted shaft can serve as a hinge to fixedly connect the body and the cover plate and can provide power assistance to enable the cover plate to be labor-saving in the opening process.

In order to achieve the purpose, the invention adopts the technical scheme that: a rotating shaft, a connecting shaft and a torsion spring; a large shaft section is arranged in the middle of the connecting shaft, and small shaft sections are arranged at two ends of the connecting shaft; the two rotating shafts are respectively and rotatably arranged on the small shaft sections at two sides of the connecting shaft; the torsion spring is coaxially arranged on the large shaft section and is positioned between the two rotating shafts, and two ends of the torsion spring are respectively and fixedly arranged on the rotating shafts on two sides. The pivot of one side is fixed on the body in the installation, and the pivot of opposite side is fixed on the apron, and the torsional spring takes place to warp when the apron is covered and produces torsion, and when lifting up the apron, torsional spring release torsion produces the helping hand, consequently reaches laborsaving purpose, and the torsion of torsional spring can use different specifications according to the gravity of apron, and in order to reach better helping hand effect simultaneously, the torsional spring just can install helping hand epaxially in the preloading, more so in helping hand axle installation in body and apron.

Preferably, the rotating shaft is provided with a clamping hole, and the clamping hole is arranged on the end face, close to the inner side, of the rotating shaft; the extension parts are arranged at two ends of the torsion spring, the extension direction of the extension parts is the rotation axis direction of the torsion spring, and the extension parts at two ends are respectively fixedly inserted in the clamping holes. The arrangement of the clamping hole and the arrangement of the extending part saves the most space under the condition of ensuring the realization of the function, the clamping hole can also be a clamping groove, the extending direction of the corresponding extending part can be perpendicular to the rotating axis of the torsion spring, and the extending part is clamped into the clamping groove to transmit the torsion force well.

Preferably, the protective shell is cylindrical and comprises a middle limiting section and sealing sections on two sides, and the diameter of the limiting section is smaller than that of the sealing sections; the rotating shaft is provided with a round shaft section and a flat shaft section, and the flat shaft section is arranged in the directions of two ends of the resistance shaft; the sealing sections on the two sides of the protective shell are in rotating transition fit with the circular shaft sections on the two sides of the rotating shaft respectively, and the end faces at the two ends of the limiting section are in abutting fit with the rotating shaft on the two sides respectively. Can keep apart the fine and external world of torsional spring through setting up the protective case, prevent that dirty entering torsional spring from influencing the life-span of torsional spring, if the torsional spring collapses absolutely by accident simultaneously, also can not hinder the people. Meanwhile, the protective shell can be integrally formed with the rotating shaft on one side, and the torsional spring can be wrapped and isolated from the outside.

Preferably, the connecting shaft further comprises fixing pieces, and the fixing pieces are arranged on two sides of the connecting shaft to prevent the rotating shaft from separating from the connecting shaft. Through setting up dismantled and assembled mounting, after-sale maintenance that can be convenient, also can restrict the pivot on the connecting axle through riveting technology under the condition of no mounting certainly.

Preferably, the fixing piece is a clamp spring, clamping grooves are formed in two ends of the connecting shaft, and the clamp spring is clamped on the clamping grooves and limits the rotating shaft.

Preferably, the fixing piece is a screw, locking holes are formed in two ends of the connecting shaft, and the screw is locked in the locking holes to limit the rotating shaft.

Preferably, the connecting shaft is provided with a stop pin, the rotating shaft is correspondingly provided with a stop boss matched with the stop pin, and the stop pin and the stop boss limit the relative rotation angle of the connecting shaft and the rotating shaft. The position stopping pin and the position stopping boss are arranged to keep the consistency of the relative angles of the rotating shafts on the left side and the right side, batch errors can be caused due to the processing of the torsion spring, if the position stopping pin and the position stopping boss are not arranged, the relative angles of the two rotating shafts depend on the relative angles of the extending parts at the two ends of the torsion spring, and due to the fact that the position stopping pin and the position stopping boss are arranged, after the torsion spring is installed in a pre-tightening mode, different pre-tightening forces are achieved, the relative angles of the torsion spring are also unchanged, and the installation of the power-assisted shaft.

Preferably, a first sealing ring is arranged between the rotating shaft and the connecting shaft, a second sealing ring is arranged between the rotating shaft and the protective shell, the first sealing ring and the second sealing ring seal a cavity in which the torsion spring moves, and lubricating oil is filled in the cavity. The protection of the torsion spring can be more facilitated by arranging the sealing ring, the characteristic of lubricating oil can be kept after the lubricating oil is added, and the lubricating and rust prevention of the torsion spring cannot be influenced by the loss caused by the change of the climate temperature.

Preferably, the cross section of torsional spring is rectangle or circular, and the pitch of torsional spring is greater than the length of torsional spring cross section axis direction, because the torsional spring is twisting the in-process, the pitch can diminish, and the pitch also can diminish, predetermines the clearance in advance and can avoid the friction between torsional spring layer and the layer to influence the smoothness nature and the life-span of its torsional force.

Preferably, the rotating shaft and the connecting shaft on one side are fixedly connected and integrally formed.

The invention has the beneficial effects that:

1. the power-assisted shaft is formed by the two rotating shafts and the torsion spring, so that the power-assisted shaft is simple in structure and easy to install, can be installed in the body and the cover plate to serve as hinges, has a power-assisted function, and can save labor when the cover is opened;

2. the protective shell is arranged to wrap the torsion spring, so that the protective effect is achieved, the appearance is more attractive, the service life is longer, and the use is safer;

3. the lubricating oil is arranged, so that the torsion spring is lubricated in the working process, and the service life of the torsion spring is prolonged;

4. the invention limits the relative angle between the rotating shafts by arranging the stop boss and the stop pin, can realize the pre-tightening installation of the torsion spring, can be adapted to cover plates with different weights, has wider application range of products and saves energy.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a perspective view of a power assist shaft according to embodiment 1 of the present invention;

FIG. 2 is a perspective exploded view of a power assist shaft according to embodiment 1 of the present invention;

FIGS. 3 and 4 are sectional views of a power assist shaft according to embodiment 1 of the present invention;

FIG. 5 is a perspective view of embodiment 2 of the present invention;

fig. 6 is a perspective exploded view of embodiment 2 of the present invention;

FIGS. 7 and 8 are sectional views of embodiment 2 of the present invention;

fig. 9 is a cross-sectional view of embodiment 3 of the present invention.

In the figure:

100-a rotating shaft; 110-shaft hole; 111-a movable slot; 112-stop boss; 120-flat shaft section; 130-round shaft section; 140-a clamping hole; 150-seal groove A; 160-a counter bore; 170-fixing hole

200-torsion spring; 210-extension

300-a connecting shaft; 310-big shaft section; 311-stop pin; 320-small shaft section; 321-seal groove B; 322-card slot; 330-locking hole

410-a first seal ring; 420-second sealing ring

510-a clamp spring; 520-screw

600-protecting the shell; 610-a limiting section; 620-seal section.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. The embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any inventive work, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to analogous items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those of ordinary skill in the art.

The following examples are given to illustrate the present invention.

As shown in fig. 1 to 4, a power assist shaft 1 according to an embodiment of the present invention includes: a rotating shaft 100, a connecting shaft 300 and a torsion spring 200; a large shaft section 310 is arranged in the middle of the connecting shaft 300, and small shaft sections 320 are arranged at two ends of the connecting shaft; the rotating shaft 100 is provided with two shaft holes 110 matched with the small shaft sections 320, and the two rotating shafts 100 are respectively and rotatably arranged on the small shaft sections 320 at two sides of the connecting shaft 300; the torsion spring 200 is coaxially disposed on the large shaft section 310 and located between the two rotating shafts 100, and two ends of the torsion spring are respectively and fixedly disposed on the rotating shafts 100 at two sides. When the power assisting device is installed, the rotating shaft 100 on one side is fixed on the body, the rotating shaft 100 on the other side is fixed on the cover plate, when the cover plate is covered, the torsion spring 200 deforms to generate torsion, when the cover plate is lifted, the torsion spring 200 releases the torsion to generate power assisting, so that the purpose of saving labor is achieved, the torsion of the torsion spring 200 can use different specifications according to the gravity of the cover plate, meanwhile, in order to achieve a better power assisting effect, the torsion spring 200 can be installed on the power assisting shaft in a pre-assembling mode in a pre-tightening mode, and therefore the power assisting shaft is more convenient to install in the body and the cover plate.

In this embodiment, the rotating shaft 100 is provided with a fastening hole 140, and the fastening hole 140 is disposed on an end surface of the rotating shaft 100 near the inner side; the two ends of the torsion spring 200 are provided with extending portions 210, the extending direction of the extending portions 210 is the direction of the rotation axis 100 of the torsion spring 200, and the extending portions 210 at the two ends are respectively fixed to the locking holes 140 in an inserting manner. The arrangement is most space-saving under the condition of ensuring function realization, of course, the card hole 140 may also be a card slot 322, correspondingly, the extending direction of the extending portion 210 may be perpendicular to the rotation axis 100 of the torsion spring 200, and the extending portion 210 is also clamped into the card slot 322 to transmit torque force well.

In this embodiment, the protective casing 600 is further included, the protective casing 600 is cylindrical, and includes a middle limiting section 610 and sealing sections 620 on two sides, and the diameter of the limiting section 610 is smaller than that of the sealing sections 620; the rotating shaft 100 is provided with a round shaft section 130 and a flat shaft section 120, the flat shaft section 120 is used for being fixed in a cover plate or a body and used for transmitting torque force, so the shape of the flat shaft can be D-shaped or polygonal, and the flat shaft section 120 is arranged at two ends of the resistance shaft; the sealing sections 620 on the two sides of the casing 600 are respectively in transition fit with the rotating shaft sections 130 of the rotating shaft 100 on the two sides, and the end surfaces on the two ends of the limiting section 610 are respectively in abutting fit with the rotating shaft 100 on the two sides. Through setting up the protective case 600 can with the torsional spring 200 is fine to be kept apart with the external world, prevents dirty entering torsional spring 200, the influence the life-span of torsional spring 200, simultaneously torsional spring 200 if the accident collapses absolutely, also can not hinder the people. Meanwhile, the protective case 600 may be integrally formed with the rotating shaft 100 on one side thereof, as long as the torsion spring 200 can be wrapped and isolated from the outside.

In this embodiment, the present invention further includes a fixing member, which is disposed on two sides of the connecting shaft 300 to prevent the rotating shaft 100 from separating from the connecting shaft 300. By arranging the fixing member which is detachable, after-sale maintenance can be facilitated, and the rotating shaft 100 can be limited on the connecting shaft 300 by a riveting process even without the fixing member.

In this embodiment, the fixing member is a snap spring 510, two ends of the connecting shaft 300 are provided with a snap groove 322, and the snap spring 510 is clamped on the snap groove 322 to limit the rotating shaft 100.

In this embodiment, the connecting shaft 300 is provided with a stop pin 311, the corresponding rotating shaft 100 is provided with a stop boss 112 matched with the stop pin 311, and the stop pin 311 and the stop boss 112 limit the relative rotation angle between the connecting shaft 300 and the rotating shaft 100. The stop pin 311 and the stop boss 112 can keep the consistency of the relative angles of the rotating shafts 100 on the left and right sides, because the torsion spring 200 is processed with batch errors, if the stop pin 311 and the stop boss 112 are not arranged, the relative angles of the two rotating shafts 100 depend on the relative angles of the extension parts 210 at the two ends of the torsion spring 200, and due to the arrangement of the stop pin 311 and the stop boss 112, different pre-tightening forces are applied to the torsion spring 200 after the torsion spring 200 is pre-tightened and the relative angles are not changed, so that the assistance shaft can be installed in the body and the cover plate.

In this embodiment, the stop pin 311 is disposed at the junction of the large shaft segment 310 and the small shaft segment 320, and is a fan-shaped protruding block fixedly connected with and extending from the large shaft segment 310; one side of the shaft hole 110 close to the circular shaft section 130 is provided with a movable groove 111, and the movable groove 111 is provided with the stop boss 112.

In this embodiment, a first sealing ring 410 is disposed between the rotating shaft 100 and the connecting shaft 300, a second sealing ring 420 is disposed between the rotating shaft 100 and the casing 600, the first sealing ring 410 and the second sealing ring 420 seal a movable cavity of the torsion spring 200, and the cavity is filled with lubricating oil. Can be more favorable to through setting up the sealing washer the protection of torsional spring 200, after adding lubricating oil, can keep the characteristic of lubricating oil, can not cause because of the change of climatic temperature and run off the influence torsional spring 200's lubrication and rust-resistant.

In this embodiment, a seal groove a150 is disposed on the small shaft segment 320 of the connecting shaft 300, and the first seal ring 410 is fixedly disposed on the seal groove a150 and is in interference fit with the shaft hole 110 of the rotating shaft 100; a sealing groove B321 is disposed on a circumferential wall of the large shaft segment 310 of the rotating shaft 100, and the second sealing ring 420 is fixedly disposed on the sealing groove B321 and is in interference fit with the sealing segment 620 of the casing 600.

In this embodiment, the cross section of torsional spring 200 is the rectangle, and certainly also can be circular, can select according to the actual production needs, just torsional spring 200's pitch is greater than the length of torsional spring 200 cross-section axis direction, because torsional spring 200 is twisting the in-process, and the pitch can also diminish, and the clearance is predetermine in advance and can be avoided torsional spring 200 layer and the friction between the layer to influence the smoothness and the life-span of its torsional force.

In this embodiment, the number of the locking holes 140 is 6, and the axis of the rotating shaft 100 is used as the axis array, so that the extension portions of the torsion spring of the same type are inserted and fixed in different locking holes, and the auxiliary torsion value can be adjusted to match different cover plate weights.

As shown in fig. 5 to 8, in embodiment 2 of the power-assisted shaft of the present invention, in this embodiment, the fixing member is a screw 520, locking holes 330 are disposed at two ends of the connecting shaft 300, a counter bore 160 and a fixing hole 170 are disposed on the end surface of the rotating shaft 100 near the flat shaft section 120, the depth of the counter bore 160 is greater than the thickness of the head of the screw 520 for accommodating the head of the screw 520, the diameter of the fixing hole 170 is smaller than the diameter of the head of the screw 520 and greater than the diameter of the rod of the screw 520, and the screw 520 is locked on the locking hole 330 to limit the rotating shaft 100.

As shown in fig. 9, in embodiment 3 of the power-assisted shaft of the present invention, the rotating shaft 100 and the connecting shaft 300 on one side are fixedly connected and integrally formed.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A power assist shaft, comprising: a rotating shaft, a connecting shaft and a torsion spring;

a large shaft section is arranged in the middle of the connecting shaft, and small shaft sections are arranged at two ends of the connecting shaft;

the two rotating shafts are respectively and rotatably arranged on the small shaft sections at two sides of the connecting shaft;

the torsion spring is coaxially arranged on the large shaft section and is positioned between the two rotating shafts, and two ends of the torsion spring are respectively and fixedly arranged on the rotating shafts on two sides.

2. The power-assisted shaft according to claim 1, wherein the shaft is provided with a locking hole, and the locking hole is arranged on an end surface of the shaft close to the inner side;

the extension parts are arranged at two ends of the torsion spring, the extension direction of the extension parts is the rotation axis direction of the torsion spring, and the extension parts at two ends are respectively fixedly inserted in the clamping holes.

3. The power-assisted shaft according to claim 1 or 2, further comprising a protective shell, wherein the protective shell is cylindrical and comprises a middle limiting section and sealing sections at two sides, and the diameter of the limiting section is smaller than that of the sealing sections; the rotating shaft is provided with a round shaft section and a flat shaft section, and the flat shaft section is arranged in the directions of two ends of the resistance shaft; the sealing sections on the two sides of the protective shell are in rotating transition fit with the circular shaft sections on the two sides of the rotating shaft respectively, and the end faces at the two ends of the limiting section are in abutting fit with the rotating shaft on the two sides respectively.

4. The power-assisted shaft according to claim 3, further comprising fixing members disposed at both sides of the connecting shaft to prevent the rotation shaft from being separated from the connecting shaft.

5. The power-assisted shaft according to claim 4, wherein the fixing member is a snap spring, two ends of the connecting shaft are provided with clamping grooves, and the snap spring is clamped on the clamping grooves to limit the rotating shaft.

6. The power-assisted shaft according to claim 4, wherein the fixing member is a screw, locking holes are formed at both ends of the connecting shaft, and the screw is locked in the locking hole to limit the rotating shaft.

7. The power-assisted shaft according to any one of claims 1, 2, 4, 5 and 6, wherein the connecting shaft is provided with a stop pin, the corresponding rotating shaft is provided with a stop boss matched with the stop pin, and the stop pin and the stop boss limit the relative rotation angle of the connecting shaft and the rotating shaft.

8. The power-assisted shaft according to claim 7, wherein a first seal ring is disposed between the rotating shaft and the connecting shaft, a second seal ring is disposed between the rotating shaft and the protective shell, the first seal ring and the second seal ring seal a cavity in which the torsion spring moves, and lubricating oil is filled in the cavity.

9. A power assist shaft as claimed in claim 8, wherein said torsion spring is rectangular or circular in cross-section.

10. The power assisting shaft as claimed in claim 9, wherein the rotation shaft and the connecting shaft are integrally formed.