GB2561265B

GB2561265B - Single direction brake formed by a plurality of discs stacked together

Info

Publication number: GB2561265B
Application number: GB1714367.8A
Authority: GB
Inventors: Shih Sen-Tien
Original assignee: Tai-World Manufacturing Co Ltd; TAI WORLD Manufacturing CO Ltd
Current assignee: Tai-World Manufacturing Co Ltd; TAI WORLD Manufacturing CO Ltd
Priority date: 2017-09-07
Filing date: 2017-09-07
Publication date: 2019-08-28
Anticipated expiration: 2037-09-07
Also published as: GB201714367D0; GB2561265A

Description

Single direction brake formed by a plurality of discs stacked together

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a rotatable brake and, more particularly, to a rotatable brake which is applied to a power machine so as to transmit single-direction torque and rotates in a single direction.

Description of the Prior Art A conventional single-direction rotatable brake is configured to avoid reverse driving, i.e. the single-direction rotatable brake transmits torque in a single direction and its driving member idly rotates when in anti-direction, hence the single-direction rotatable brake is applicable for power machines, such as bicycles, motorcycles, or rotary tool which cannot be rotated reversely.

The single-direction rotatable brake contains a body and multiple rolling members, wherein the body is circular and has a fitting face on which multiple accommodation recesses are separately arranged so as to house the multiple rolling members respectively, and the rolling members move and roll in the multiple accommodation recesses individually. In use, the fitting face of the body fits with a rotation element, wherein one of the body and the rotation element is the driving member, and the other of the body and the rotation element is a driven member. When the driving member rotates relative to the driven member in one direction, it drives the driven member to rotate. When the driving member revolves with respect to the driven member in the other direction, it idly rotates relative to the driven member.

However, a requirement of structural strength and accuracy of the multiple accommodation recesses are extremely high, so material of high-hardness is essential. Furthermore, a computer numerical control (CNC) machine is employed to machine the single-direction rotatable brake at high production cost, and the body includes a stopper fitted thereon so as to avoid a removal of the multiple rolling members from the multiple accommodation recesses, thus having inconvenient assembly.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a rotatable brake, a loop of which is formed by multiple hollow discs which stack together, wherein multiple hollow discs of the rotatable brake are stamped, cut, and machined easily and quickly without using a computer numerical control (CNC) machine so as to reduce fabrication cost.

According to the present invention there is provided a rotatable brake as claimed in claim 1.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the exploded components of a rotatable brake in accordance with a preferred embodiment of the present invention. FIG. 2 is a perspective view showing the assembly of the rotatable brake in accordance with the preferred embodiment of the present invention. FIG. 3 is a perspective view showing the assembly of the rotatable brake in accordance with the preferred embodiment of the present invention. FIG. 4 is a cross-sectional view showing the assembly of the rotatable brake in accordance with the preferred embodiment of the present invention. FIG. 5 is another cross-sectional view showing the assembly of the rotatable brake in accordance with the preferred embodiment of the present invention. FIG. 6 is an amplified view of a portion A1 of FIG. 5. FIG. 7 is a cross-sectional view showing the operation of the rotatable brake in accordance with the preferred embodiment of the present invention. FIG. 8 is another cross-sectional view showing the operation of the rotatable brake in accordance with the preferred embodiment of the present invention. FIG. 9 is also another cross-sectional view showing the operation of the rotatable brake in accordance with the preferred embodiment of the present invention. FIG. 10 is still another cross-sectional view showing the operation of the rotatable brake in accordance with the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

Referring to the drawings and initially to FIGS. 1-6, a rotatable brake in accordance with a preferred embodiment of the present invention comprises: multiple hollow discs 10, a plurality of locking members 20, two stop caps 30; multiple springs 40 and multiple connection posts 50 which match with the plurality of locking members 20 respectively.

Each of the multiple hollow discs 10 is made of metal material and is plane, wherein each hollow disc 10 includes a plurality of accommodation recesses 11 arranged around an inner rim thereof, each of the plurality of accommodation recesses 11 has an engagement segment 111 defined at a clockwise end of each accommodation recess 11, and the engagement segment 111 has a first depth hi. Each accommodation recess 11 has a disengagement segment 112 defined at a counterclockwise end thereof, and the disengagement segment 112 has a second depth h2, wherein the first depth hi of the engagement segment 111 is less than the second depth h2 of the disengagement segment 112. Each hollow disc 10 includes multiple first orifices 12 arranged between the inner rim and an outer rim of each hollow disc 10 and not communicating with the plurality of accommodation recesses 11. The multiple hollow discs 10 stack together so as to form a loop 10A, wherein the plurality of accommodation recesses 11 correspond to the multiple first orifices 12 individually, and the loop 10A includes a through hole 10B defined on a central position thereof.

The loop 10A includes threads 10C formed on an outer wall thereof.

Each of the plurality of locking members 20 includes a circular column 21 with an outer diameter d1, and each locking member 20 also includes two limitation parts 22 respectively extending outward from two ends thereof, wherein a diameter of each of the two limitation parts 22 is less than the outer diameter d1 of the circular column 21. The circular column 21 of each locking member 20 accommodates in accommodation recesses 11 which are formed by stacking the multiple hollow discs 10 together, wherein the circular column 21 of each locking member 20 moves between the engagement segment 111 and the disengagement segment 112 of each accommodation recess 11.

The two stop caps 30 cover on two surfaces of the loop 10A respectively, each of the two stop caps 30 includes multiple elongated dead apertures 31 corresponding to the plurality of accommodation recesses 11 individually, wherein the length of each of the multiple elongated dead apertures 31 matches with the first depth hi of the engagement segment 111 and the second depth h2 of the disengagement 112, and each elongated dead aperture 31 has a notch 32 not passing through each elongated dead aperture 31 and adjacent to the disengagement segment 112. Each stop cap 30 further includes multiple second orifices 33 corresponding to the multiple first orifices 12 of each hollow disc 10 individually, wherein the two limitation parts 22 of each locking member 20 are located in each elongated dead aperture 31, and the two stop caps 30 fix the plurality of locking members 20.

Each of the multiple springs 40 is housed in the notch 32 of each elongated dead aperture 31 and pushes each limitation part 22 of each locking member 20 so that each locking member 20 abuts against each elongated dead aperture 111.

Each of the multiple connection posts 50 connects with each of the multiple second orifices 33 via each of the multiple first orifices 12 so as to connect the multiple hollow discs 10 and the two stop caps 30 together.

Each stop cap 30 further includes at least one fixing disc 30A and a covering disc 30B which are made of metal material and are plane, wherein each elongated dead aperture 31 and the notch 32 of each elongated dead aperture 31 are defined on the at least one fixing disc 30A, and the covering disc 30B is away from the loop 10A and does not pass through each elongated dead aperture 31 and the notch 32. In this embodiment, three fixing discs 30A are stacked together, and each of notches 32 of a middle one of the three fixing discs 30A has an extension 34 extending from a central position thereof, such that when each spring 40 is housed in the notch 32 of each elongated dead aperture 31, a part of each spring 40 fits on the extension 34.

As shown in FIGS. 5 and 6, in use, the threads 10C of the loop 10A screw with a fixer 60, the through hole 10B accommodates a braking part 70 which contacts with the circular column 21 of each locking member 20. With reference to FIGS. 7 and 8, when the rotatable brake and the braking part 70 rotate in one direction, each locking member 20 is pushed to the disengagement segment 112 from the engagement segment 111 and moves to the second depth h2 from the first depth hi so that each locking member 20 does not interfere a rotation of the braking part 70, and each spring 40 is pressed by each limitation part 22 of each locking member 20. Referring to FIGS. 9 and 10, when the rotatable brake and the braking part 70 rotate in the other direction, a pushing force of each locking member 20 disappears so that each spring 40 pushes each limitation part 22 outwardly, and each locking member 20 is pushed to the engagement segment 111 from the disengagement segment 112 and moves to the first depth hi from the second depth h2, such that the circular column 21 of each locking member 20 limits the rotation of the braking part 70, and the rotatable brake, the fixer 60, and the braking part 70 are locked by one another.

Accordingly, the rotatable brake of the present invention has the following advantages: 1. The loop 10A of the rotatable brake is formed by the multiple hollow discs 10 which stack together, wherein the multiple hollow discs 10 are stamped, cut, and machined easily and quickly without using a computer numerical control (CNC) machine so as to reduce fabrication cost. 2. Each locking member 20 includes the two limitation parts 22 respectively extending outward from two ends thereof, the two stop caps 30 cover on the two surfaces of the loop 10A respectively, each stop cap 30 includes the multiple elongated dead apertures 31 corresponding to the plurality of accommodation recesses 11 individually so that the two limitation parts 22 of each locking member 20 move in each elongated dead aperture 31, and a position and a movement of each locking member 20 are limited by each elongated dead aperture 31 easily.

Claims

WHAT IS CLAIMED IS:

1. A rotatable brake comprising: multiple hollow discs made of metal material and being plane, each of the multiple hollow discs including a plurality of accommodation recesses arranged around an inner rim of each hollow disc, each of the plurality of accommodation recesses having an engagement segment defined at a clockwise end thereof, each engagement segment having a first depth, each accommodation recess having a disengagement segment defined at a counterclockwise end thereof, and each disengagement segment having a second depth, wherein the first depth of each engagement segment is less than the second depth of each disengagement segment, each hollow disc includes multiple first orifices arranged between the inner rim and the outer rim of each hollow disc and not communicating with the plurality of accommodation recesses, wherein the multiple hollow discs stack together so as to form a loop, the plurality of accommodation recesses correspond to the multiple first orifices individually, and the loop includes a through hole defined on a central position thereof, wherein the loop includes threads formed on an outer wall thereof; a plurality of locking members, each of the plurality of locking members including a circular column with an outer diameter, and each locking member also including two limitation parts respectively extending outward from two ends of each locking member, wherein a diameter of each of the two limitation parts is less than the outer diameter of the circular column, the circular column of each locking member being accommodated in the accommodation recesses which are formed by stacking the multiple hollow discs together, wherein the circular column of each locking member moves between the engagement segment and the disengagement segment of each accommodation recess; two stop caps covering on two surfaces of the loop respectively, each of the two stop caps including multiple elongated dead apertures corresponding to the plurality of accommodation recesses individually, wherein a length of each of the multiple elongated dead apertures matches with the first depth of the engagement segment and the second depth of the disengagement, the two limitation parts of each locking member are located in each elongated dead aperture, and each elongated dead aperture has a notch not passing through each elongated dead aperture and adjacent to the disengagement segment; multiple springs mating with the plurality of locking members respectively, wherein each of the multiple springs is housed in the notch of each elongated dead aperture and pushes each limitation part of each locking member so that each locking member abuts against each elongated dead aperture; and multiple connection posts, each of the multiple connection posts connecting with second orifices in the stop caps via each of the multiple first orifices so as to connect the multiple hollow discs and the two stop caps together to form the rotatable brake.

2. The rotatable brake of claim 1, wherein each elongated dead aperture does not pass through each stop cap.

3. The rotatable brake of claim 1, wherein each stop cap further includes multiple second orifices corresponding to the multiple first orifices of each hollow disc individually, and each connection post passes through each first orifice of each hollow disc and each second orifice of each stop cap.

4. The rotatable brake of claim 1, wherein each stop cap further includes at least one fixing disc made of metal material and being plane, and each elongated dead aperture and the notch of each elongated dead aperture are defined on the at least one fixing disc.

5. The rotatable brake of claim 1, wherein each stop cap further includes at least one fixing disc and a covering disc which are made of metal material and are plane, each elongated dead aperture and the notch of each elongated dead aperture are defined on the at least one fixing disc, and the covering disc is away from the loop and does not pass through each elongated dead aperture and the notch.

6. The rotatable brake of claim 1, wherein the notch has an extension extending from a central position thereof so that when each spring is housed in the notch of each elongated dead aperture, a part of each spring fits on the extension.

7. The rotatable brake of claim 4, wherein the notch has an extension extending from a central position thereof so that when each spring is housed in the notch of each elongated dead aperture, a part of each spring fits on the extension.

8. The rotatable brake of claim 5, wherein the notch has an extension extending from a central position thereof so that when each spring is housed in the notch of each elongated dead aperture, a part of each spring fits on the extension.