CN219263034U

CN219263034U - Spring brake

Info

Publication number: CN219263034U
Application number: CN202223605543.5U
Authority: CN
Inventors: 欧欢庆
Original assignee: Lewu Guangdong High Tech Technology Co ltd
Current assignee: Lewu Guangdong High Tech Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-27
Anticipated expiration: 2032-12-30

Abstract

The utility model belongs to the technical field of electric lifting mechanisms, and particularly relates to a spring brake. The friction surface in the shell is matched with the outer circumferential surface of the brake spring to achieve the effect of deceleration braking, when the main rotating member rotates along with the driving mechanism, the brake spring is contracted in the radial direction, so that a gap is formed between the outer circumferential surface of the brake spring and the friction surface, rotation during lifting transmission is not affected, the auxiliary rotating member can rotate relative to the main rotating member in the circumferential direction through the arrangement of the gap, after the driving mechanism stops rotating, the auxiliary rotating member rotates relative to the main rotating member due to the weight of the lifting member, the brake spring is expanded outwards in the radial direction at the moment, the outer circumferential surface of the brake spring is gradually close to and contacted with the friction surface, the effect of deceleration and braking is achieved, and more stable braking can be achieved by utilizing the weight of the heavier lifting member to convert the heavy lifting member into braking friction force, and safety accidents are prevented.

Description

Spring brake

Technical Field

The utility model belongs to the technical field of electric lifting mechanisms, and particularly relates to a spring brake.

Background

Along with development of science and technology, more and more intelligent furniture is in people's life, and intelligent house uses house as the unit, uses internet of things, and the ecological circle of house that comprises hardware, software system, cloud platform provides safe, convenient house living environment for the user, has improved people's quality of life and comfort level. Wherein, need drive through elevating gear among the furniture such as electronic sunshade curtain, (window) curtain, projecting apparatus screen, utilize elevating gear to hang elevating gear such as sunshade curtain, (window) curtain, projecting apparatus screen, realize the rising and the decline of elevating gear under the drive of actuating mechanism. The lifting part has weight, and the weight is increased due to the large size of the lifting part, such as a sunshade curtain and a projector screen, when the driving mechanism stops in the lifting process, the lifting part has a descending trend under the action of the gravity of the lifting part, and when the lifting part is braked by the driving mechanism, the braking close to the driving mechanism is easy to fail under the condition of large gravity of the lifting part, so that the lifting part falls down, thereby causing a safety accident.

In the prior art, a spring structure and a locking structure are additionally arranged between a driving mechanism and a lifting part to realize braking, so that the falling phenomenon is prevented, but in the actual use process of the existing braking modes, the slipping phenomenon is easy to occur, and serious consequences are caused by braking failure.

Disclosure of Invention

The utility model aims to provide a spring brake, which realizes transmission and braking through the cooperation of a main rotating piece, an auxiliary rotating piece, a braking spring and a shell, and has good braking effect.

Based on the above, the utility model provides a spring brake, which comprises a shell, a main rotating piece, an auxiliary rotating piece and a brake spring;

the shell is internally provided with a mounting cavity penetrating through two sides of the shell, and the inner wall of the mounting cavity is provided with a friction surface;

the main rotating piece is arranged on the shell and is used for being connected with the driving mechanism, and a first extension part positioned in the mounting cavity is arranged on the main rotating piece;

the auxiliary rotating piece is used for being in butt joint with the output end or the lifting part, a second extending part extending towards the direction of the main rotating piece is arranged on the auxiliary rotating piece, the auxiliary rotating piece is driven to rotate by touching the second extending part through the first extending part when the main rotating piece rotates, a gap is arranged between the first extending part and the second extending part in the circumferential direction, and the auxiliary rotating piece rotates relative to the main rotating piece through the gap by the second extending part when the main rotating piece is stationary;

the brake spring is spirally arranged on the peripheries of the first extending part and the second extending part, the periphery of the brake spring is opposite to the friction surface, a first end part and a second end part which extend towards the inner side of the brake spring are arranged on the brake spring, and the first end part and the second end part are respectively positioned at two sides of the second extending part and are both positioned in the gap;

when the main rotating piece rotates, the first extending part is contacted with the first end part or the second end part to drive the brake spring to rotate and enable the brake spring to shrink inwards, and when the main rotating piece is static and the auxiliary rotating piece rotates relative to the main rotating piece, the second extending part is contacted with the first end part or the second end part to drive the brake spring to rotate and enable the brake spring to expand outwards to be contacted with the friction surface.

The spring brake is characterized in that the first extension part is an arc-shaped enclosing baffle, and an arc-shaped notch is formed in the circumferential direction of the arc-shaped enclosing baffle;

the second extension part is provided with an arc-shaped matching block which stretches into the arc-shaped notch, the radian of the arc-shaped matching block is smaller than that of the arc-shaped notch, and a gap is formed between the arc-shaped notch and two sides of the arc-shaped matching block.

In one spring brake, as described above, the first extension portion is provided with a first step on one side of the arc-shaped notch, and the first step can accommodate the first end portion;

a second step is arranged on one side of the second extension part, and the second end part can be accommodated in the second step.

According to the spring brake, the accommodating cavity is formed in the middle of the first extension portion, the embedded portion located in the accommodating cavity is arranged on the second extension portion, and the arc-shaped matching block is located on the outer peripheral surface of the embedded portion.

The spring brake is characterized in that the main rotating piece further comprises a rotary disc, the first extending part is located at one end of the rotary disc, a first transmission gear set is arranged at the other end of the rotary disc, and a first inner tooth surface meshed with the first transmission gear set is arranged on the inner circumferential surface of the mounting cavity.

The spring brake further comprises a connecting pin, a through hole is formed in the middle of the rotary disc, a connecting hole is formed in one end, opposite to the rotary disc, of the second extension portion, and the connecting pin penetrates through the through hole to be connected into the connecting hole.

The spring brake further comprises an output transmission piece, the auxiliary rotation piece further comprises a gear shaft arranged on the other side of the embedded part, a second transmission gear set meshed with the gear shaft is arranged on one side of the output transmission piece, and a second inner tooth surface meshed with the second transmission gear set is arranged on the inner circumferential surface of the mounting cavity.

The spring brake further comprises an input transmission piece, an input rotating shaft in butt joint with the driving part and a third transmission gear set meshed with the input rotating shaft are arranged on one side of the input transmission piece, and an input gear shaft meshed with the first transmission gear set for transmission is arranged on the other side of the input transmission piece.

The spring brake is characterized in that the second extension part is an arc-shaped enclosing baffle, an arc-shaped notch is formed in the circumferential direction of the arc-shaped enclosing baffle, and the first extension part is provided with an arc-shaped matching block extending into the arc-shaped notch.

The embodiment of the utility model has the following beneficial effects:

the utility model provides a spring brake, which realizes the effect of decelerating and braking by utilizing the cooperation of a friction surface in a shell and the outer circumferential surface of a brake spring, when a main rotating member rotates along with a driving mechanism, the brake spring radially contracts, so that a gap is formed between the outer circumferential surface of the brake spring and the friction surface, the rotation during lifting transmission is not influenced, and a secondary rotating member can rotate relative to the main rotating member in the circumferential direction through the arrangement of the gap, so that after the driving mechanism stops rotating, the secondary rotating member rotates relative to the main rotating member due to the weight of a lifting member, the brake spring radially expands at the moment, the outer circumferential surface of the brake spring gradually approaches and contacts with the friction surface, thereby playing the role of decelerating and braking, and playing a role of more stable braking and preventing safety accidents by converting the weight of the heavier lifting member into braking friction force.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a spring brake according to the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is an internal structural view of the housing of FIG. 1;

FIG. 4 is an exploded view I of FIG. 3;

FIG. 5 is a second exploded view of FIG. 3;

FIG. 6 is a schematic view of the brake spring within the housing as the main rotor rotates;

FIG. 7 is a schematic view of the brake spring within the housing during braking;

fig. 8 is an internal structural view of the housing.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 8, an embodiment of the present utility model provides a spring brake including a housing 1, a main rotor 2, a sub rotor 3, and a brake spring 4; in the scheme, the main rotating piece 2 drives the auxiliary rotating piece 3 to rotate positively and negatively, so that lifting action of a lifting part is realized, and the effect of decelerating and braking is achieved by adding the braking spring 4.

The concrete structure is as follows: the shell 1 is internally provided with a mounting cavity penetrating through two sides of the shell, and the inner wall of the mounting cavity is provided with a friction surface; the main rotating member 2 is arranged on the shell 1 and is used for being connected with the driving mechanism 9, and a first extension part 21 positioned in the mounting cavity is arranged on the main rotating member 2; the auxiliary rotating member 3 is used for being in butt joint with an output end or a lifting component, a second extending part 31 extending towards the direction of the main rotating member 2 is arranged on the auxiliary rotating member 3, the auxiliary rotating member 3 is driven to rotate by touching the second extending part 31 through the first extending part 21 when the main rotating member 2 rotates, a gap 301 is arranged between the first extending part 21 and the second extending part 31 in the circumferential direction, and the second extending part 31 enables the auxiliary rotating member 3 to rotate relative to the main rotating member 2 through the gap 301 when the main rotating member 2 is stationary; the brake spring 4 is spirally arranged on the outer circumferences of the first extension part 21 and the second extension part 31, the outer circumference of the brake spring 4 is opposite to the friction surface, the brake spring 4 is provided with a first end part 41 and a second end part 42 which extend towards the inner side of the brake spring 4, and the first end part 41 and the second end part 42 are respectively positioned in the gap 301 at two sides of the second extension part 31; the friction surface in the shell is matched with the outer peripheral surface of the braking spring to achieve the effect of decelerating and braking.

When the main rotating member 2 rotates, the first extending portion 21 contacts with the first end portion 41 or the second end portion 42 to drive the brake spring 4 to rotate and retract the brake spring 4, and when the main rotating member 2 is stationary and the auxiliary rotating member 3 rotates relative to the main rotating member 2, the second extending portion 31 contacts with the first end portion 41 or the second end portion 42 to drive the brake spring 4 to rotate and expand the brake spring 4 to contact with the friction surface. When the main rotating member rotates along with the driving mechanism, the braking spring is contracted along the radial direction, so that a gap is formed between the outer peripheral surface of the braking spring and the friction surface, the rotation during lifting transmission is not influenced, and the auxiliary rotating member can rotate relative to the main rotating member in the circumferential direction through the arrangement of the gap, so that after the driving mechanism stops rotating, the auxiliary rotating member rotates relative to the main rotating member due to the weight driving of the lifting member, the braking spring is expanded outwards along the radial direction, the outer peripheral surface of the braking spring is gradually close to and contacts with the friction surface, the effect of decelerating and braking is achieved, and more stable braking can be achieved for heavier lifting members by utilizing the friction force of braking converted by the weight of the heavy lifting member, and safety accidents are prevented.

The principle of the scheme is as follows: as shown in fig. 6 and 7, the cross section of the brake spring is a circular ring, and the first end 41 and the second end 42 divide the circular ring into two sections of circular arcs, wherein the first extension part 21 is positioned in one section of circular arc, and the second extension part 31 is positioned in the other section of circular arc, so that the effect that the first extension part 21 or the second extension part 31 can drive the brake spring to rotate through contacting with the first end 41 or the second end 42 in the process of forward and reverse rotation can be ensured. In this embodiment, the first end 41 and the second end 42 of the brake spring are formed by bending the two ends of the brake spring toward the center in the radial direction, so that one side of the first end 41 and the second end 42 connected with the brake spring is the inner side, and the other side is the outer side, so that the first end 41 and the second end 42 divide the circular ring into two sections of circular arcs, namely an inner circular arc and an outer circular arc, respectively, and as long as the first extension 21 is arranged on the inner circular arc, the first extension pushes the brake spring in the direction of the spiral of the brake spring in both forward rotation and reverse rotation, thereby enabling the brake spring to shrink inward in the radial direction. Similarly, the second extension 31 is provided on the outer circular arc, which pushes the brake spring in the reverse direction of the direction in which the brake spring is coiled, regardless of the normal rotation or the reverse rotation, so that the brake spring expands radially outward.

In an embodiment of the present utility model, a first embodiment of the first extension portion and the second extension portion is: the first extension part 21 is an arc-shaped enclosure, and an arc-shaped notch 201 is formed in the circumferential direction of the arc-shaped enclosure; the second extension portion 31 has an arc-shaped matching block 311 extending into the arc-shaped gap 201, the arc of the arc-shaped matching block 311 is smaller than the arc of the arc-shaped gap 201, and the gap 301 is formed between the arc-shaped gap 201 and two sides of the arc-shaped matching block 311. When the first extension part 21 rotates, the side wall of the arc-shaped notch 201 contacts with the arc-shaped matching block 311, so that the second extension part is driven to rotate together.

In the embodiment of the present utility model, the second embodiment of the first extension portion and the second extension portion is: the second extension portion 31 is an arc-shaped enclosure, an arc-shaped gap 201 is formed in the circumferential direction of the arc-shaped enclosure, and the first extension portion 21 is provided with an arc-shaped matching block 311 extending into the arc-shaped gap 201. The principle is the same as in the first embodiment, except that the two components are in opposite manifestations.

In this embodiment, a first step 202 is disposed on a side of the first extension portion 21 located on the arc-shaped notch 201, and the first step 202 can accommodate the first end 41;

a second step 302 is provided on one side of the second extension 31, and the second step 302 can accommodate the second end 42. By the arrangement of the first step 202 and the second step 302, the effect of giving way during rotation is achieved, that is, the first end 41 and the second end 42 can fall into the first step 202 and the second step 302 respectively, so that the contact between the side edge of the first extension 21 and the side edge of the arc-shaped matching block 311 during rotation is not affected.

In the embodiment of the present utility model, in order to enable the auxiliary rotating member 3 to stably rotate along with the main rotating member, the middle portion of the first extending portion 21 is provided with the accommodating cavity 210, the second extending portion 31 is provided with the embedded portion 310 located in the accommodating cavity 210, and the arc-shaped matching block 311 is located on the outer peripheral surface of the embedded portion 310. The engagement of the receiving chamber 210 with the insertion portion 310 corresponds to the definition of the auxiliary rotary member 3 in the radial direction.

Of course, in order to further define the cooperation, in this solution, as shown in fig. 4 and 5, the device further includes a connection pin 8, a through hole is provided in the middle of the turntable 29, a connection hole is provided on an end of the second extension 31 opposite to the turntable 29, and the connection pin 8 is connected into the connection hole through the through hole.

In the embodiment of the present utility model, in order to improve stability in the transmission process, the main rotating member 2 further includes a turntable 29, the first extension portion 21 is located at one end of the turntable 29, a first transmission gear set 51 is disposed at the other end of the turntable 29, and a first inner tooth surface meshed with the first transmission gear set 51 is disposed on an inner circumferential surface of the installation cavity. Specifically, in the scheme, the first transmission gear set 51 adopts a planetary gear structure, all gears are meshed all the time during transmission, the friction and abrasion are small, and the service life is long; and the structure is simple and compact, the load is distributed to a plurality of teeth, and the strength is high.

In addition, in the embodiment of the present utility model, the spring brake further includes an output transmission member 6, the auxiliary rotation member 3 further includes a gear shaft 312 disposed on the other side of the embedded portion 310, one side of the output transmission member 6 is provided with a second transmission gear set 52 meshed with the gear shaft 312, and an inner circumferential surface of the installation cavity is provided with a second inner tooth surface meshed with the second transmission gear set 52. The second drive gear set 52 is also of planetary construction, providing the same advantages as described above. In addition, the output transmission part 6 is in butt joint with an output end or a lifting part through a polygonal output shaft.

Further, in the embodiment of the present utility model, the spring brake further includes an input transmission member 7, an input rotation shaft 71 abutting against the driving member and a third transmission gear set 53 meshed with the input rotation shaft 71 are disposed on one side of the input transmission member 7, and an input gear shaft 72 meshed with the first transmission gear set 51 and driven is disposed on the other side of the input transmission member 7. The third drive gear set 53 is also of planetary construction, and has the same advantages as described above.

It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the utility model. Furthermore, references to orientations or positional relationships of the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc. are based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

While the foregoing is directed to the preferred embodiments of the present utility model, it should be noted that modifications and variations could be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and variations are to be regarded as being within the scope of the utility model.

Claims

1. The utility model provides a spring brake, includes casing (1), main rotating member (2), vice rotating member (3) and braking spring (4), its characterized in that:

the shell (1) is internally provided with a mounting cavity penetrating through two sides of the shell, and the inner wall of the mounting cavity is provided with a friction surface;

the main rotating piece (2) is arranged on the shell (1) and is used for being connected with the driving mechanism (9), and a first extension part (21) positioned in the mounting cavity is arranged on the main rotating piece (2);

the auxiliary rotating piece (3) is used for being in butt joint with the output end or the lifting part, a second extending part (31) extending towards the direction of the main rotating piece (2) is arranged on the auxiliary rotating piece, the auxiliary rotating piece (3) is driven to rotate by touching the second extending part (31) through the first extending part (21) when the main rotating piece (2) rotates, a gap (301) is formed between the first extending part (21) and the second extending part (31) in the circumferential direction, and the second extending part (31) enables the auxiliary rotating piece (3) to rotate relative to the main rotating piece (2) through the gap (301) when the main rotating piece (2) is stationary;

the brake spring (4) is spirally arranged on the peripheries of the first extension part (21) and the second extension part (31), the periphery of the brake spring (4) is opposite to the friction surface, a first end part (41) and a second end part (42) which extend towards the inner side of the brake spring (4) are arranged on the brake spring (4), and the first end part (41) and the second end part (42) are respectively arranged on two sides of the second extension part (31) and are both positioned in the gap (301);

when the main rotating piece (2) rotates, the first extending part (21) is contacted with the first end part (41) or the second end part (42) to drive the brake spring (4) to rotate and enable the brake spring (4) to shrink inwards, and when the main rotating piece (2) is static and the auxiliary rotating piece (3) rotates relative to the main rotating piece (2), the second extending part (31) is contacted with the first end part (41) or the second end part (42) to drive the brake spring (4) to rotate and enable the brake spring (4) to expand outwards to be contacted with the friction surface.

2. A spring brake according to claim 1, characterized in that the first extension (21) is an arc-shaped enclosure, and an arc-shaped gap (201) is formed in the circumference of the arc-shaped enclosure;

the second extension part (31) is provided with an arc-shaped matching block (311) extending into the arc-shaped notch (201), the radian of the arc-shaped matching block (311) is smaller than that of the arc-shaped notch (201), and a gap (301) is formed between the arc-shaped notch (201) and two sides of the arc-shaped matching block (311).

3. A spring brake according to claim 2, characterized in that said first extension (21) is provided with a first step (202) on one side of said arcuate notch (201), said first step (202) being adapted to receive said first end (41);

a second step (302) is arranged on one side of the second extension (31), and the second step (302) can accommodate the second end (42).

4. A spring brake according to claim 2 or 3, wherein the first extension portion (21) has a cavity (210) formed in the middle thereof, the second extension portion (31) has an embedded portion (310) disposed in the cavity (210), and the arcuate engagement block (311) is disposed on an outer peripheral surface of the embedded portion (310).

5. A spring brake according to claim 4, wherein the main rotor (2) further comprises a turntable (29), the first extension (21) is located at one end of the turntable (29), the other end of the turntable (29) is provided with a first gear set (51), and the inner circumferential surface of the mounting cavity is provided with a first inner tooth surface engaged with the first gear set (51).

6. A spring brake according to claim 5, further comprising a connecting pin (8), the middle part of the turntable (29) being provided with a through hole, the end of the second extension (31) opposite the turntable (29) being provided with a connecting hole, the connecting pin (8) being connected into the connecting hole through the through hole.

7. A spring brake according to claim 5, further comprising an output transmission member (6), said auxiliary rotation member (3) further comprising a gear shaft (312) provided on the other side of the embedded portion (310), a second transmission gear set (52) engaged with said gear shaft (312) being provided on one side of said output transmission member (6), and a second inner tooth surface engaged with said second transmission gear set (52) being provided on an inner peripheral surface of said mounting chamber.

8. A spring brake according to claim 7, further comprising an input transmission member (7), wherein an input rotary shaft (71) abutting against a driving member and a third transmission gear set (53) meshing with the input rotary shaft (71) are provided on one side of the input transmission member (7), and an input gear shaft (72) meshing with the first transmission gear set (51) is provided on the other side of the input transmission member (7).

9. A spring brake according to claim 1, wherein the second extension (31) is an arc-shaped enclosure, an arc-shaped gap (201) is formed in the circumference of the arc-shaped enclosure, and the first extension (21) has an arc-shaped mating block (311) extending into the arc-shaped gap (201).