CN213619928U

CN213619928U - Static automatic braking structure for wheel

Info

Publication number: CN213619928U
Application number: CN202022199206.5U
Authority: CN
Inventors: 詹前灿
Original assignee: Yuanyang Industrial Co ltd
Current assignee: Yuanyang Industrial Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-07-06
Anticipated expiration: 2030-09-29

Abstract

The utility model provides a static type automatic brake structure of wheel, including a base, a cam, two support and a linkage gear that reset, install inside a car wheel hub, and be connected with a shaft of this car wheel hub. The base is installed in the wheel hub, a plurality of installation holes and three first pivot holes are formed in the base, the cam is movably pivoted in the first pivot hole, a protruding portion and two driving portions are arranged outside the cam, the two reset supports are respectively pivoted in the two remaining first pivot holes, a limiting notch is respectively formed in the two reset supports corresponding to the two driving portions, the linkage gear is fixedly arranged on the wheel shaft and meshed with the protruding portion, the two driving portions are located in the two limiting notches to form locking, when the cam moves, the linkage gear drives the protruding portion to swing, the two driving portions push the two reset supports to form a release state, and safety during use is greatly improved.

Description

Static automatic braking structure for wheel

Technical Field

The utility model relates to a transportation equipment's field especially is about one kind apply to as: the wheel static automatic brake structure for baby carriage, push cart, wheel chair and other man-powered vehicles has similar bidirectional ratchet design and can make the wheel automatically enter into brake state when it is stopped and automatically release brake state after it is moved again.

Background

Various types of human powered vehicles include: strollers, carts, wheelchairs, etc. that are manually propelled to move, particularly carts used in many industries, the photovoltaic industry and the semiconductor industry, must be continuously filled with semi-finished products, such as: wafers, glass substrates, semiconductor chips, precision electronic parts, etc. are transported between different stations, the transport cart is usually provided with a plurality of wheels for moving, and the wheels are stopped or kept in a locked state when stationary by a brake device, the brake device stops moving by a friction force generated between a brake pad and a wheel hub; however, the brake pad is frequently worn to reduce the braking effect, and the particles and debris generated by the friction between the brake pad and the wheel hub are also a pollution and a trouble in production for the industries of semiconductors, photovoltaics, etc. which must be in a clean room.

Furthermore, the brake device of these carts mostly needs to be operated by a user to maintain the locked state when the cart is stationary, so as to prevent the cart from moving and damaging the transported products due to accidental touch or collision. In addition, the same problem is also found in the manual vehicles such as strollers or wheelchairs, especially when the vehicle travels on a slope or a smooth road, the vehicle may slide down due to the careless release of hands, and the passengers may be dangerous, or the stroller or the wheelchair is designed to have an automatic brake that needs to be pressed and unlocked on one side of the wheel, but most of the vehicles must be continuously pressed to unlock the vehicle, and the vehicle can be used for a long time.

In view of this, the utility model discloses a static type automatic brake structure of wheel utilizes to install between wheel hub and shaft to the static type automatic brake structure of wheel of locking wheel hub in the relative position of shaft, and can arrange special brake block structure in pairs or groups, form the using-way of more differences, and can use the occasion of various differences, promote the security when using by a wide margin to the designer is in order to engage in brake equipment's manufacturing and the many years experience of design, and then designs.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a stationary automatic brake structure for a vehicle wheel, which utilizes a combination of a base, a cam, two reset brackets and a linkage gear, and is installed between a wheel hub and a wheel shaft, so as to lock the wheel hub at a relative position of the wheel shaft, so as to automatically enter a locked state when stationary, and unlock the wheel hub after being pushed to form a movable state, which can move forward or backward smoothly; furthermore, the utility model discloses further special gear structure of collocation and brake block connecting rod group form the using-way of more differences, and can use the occasion of various differences to reach the efficiency that promotes the security when using by a wide margin.

In order to achieve the above object, the utility model discloses a static type automatic brake structure of wheel installs in a car wheel hub inside, and is connected with a shaft of this wheel hub, and this brake structure includes: a base, which is in a disc-shaped structure and is fixedly arranged in the wheel hub, the center of the base is provided with a shaft hole corresponding to the wheel hub, and the periphery of the shaft hole is provided with a plurality of mounting holes and three first pivoting holes; a cam, the center of which is provided with a second pivot hole for movably pivoting the cam in the first pivot hole, the periphery of the cam is provided with a convex part corresponding to the direction of the shaft hole, and two driving parts are respectively convexly arranged on two symmetrical positions of the cam; two reset brackets which are respectively pivoted in the two remaining first pivoting holes to form a pivoting end, the other ends of the two reset brackets form a movable end, the two reset brackets are arranged oppositely to each other, so that the two reset brackets rotate by taking the pivoting end as a fulcrum, and the two reset brackets are respectively provided with a limit notch corresponding to the two driving parts; and a linkage gear fixed on the wheel shaft; when the wheel is in a static state, the two driving parts respectively fall into the two limit notches to lock the wheel hub, and when the wheel rotates forwards or reversely, the linkage gear drives the protruding part of the cam to swing, so that the two driving parts are separated from the two limit notches to jack the two reset brackets, and the wheel hub is in a release moving state.

In an embodiment, the position of one side of the cam corresponding to the second pivot hole of the present invention is provided with a mounting groove for mounting a push rod, and two ends of the push rod are respectively exposed around the cam to form the two driving portions.

In another embodiment, the present invention further comprises a pair of stoppers, each of the stoppers is disposed outside each of the reset brackets, and each of the stoppers is L-shaped to press each of the reset brackets to cover the inside of each of the stoppers. Furthermore, the elastic elements are respectively hooked at the movable ends of the two reset brackets, so that the two reset brackets keep clamping the cam. Or through a pair of elastic elements and a pair of positioning blocks, the two positioning blocks are respectively arranged at the outer sides of the two reset brackets for respectively accommodating the elastic elements therein, so that the other ends of the two elastic elements respectively abut against the two reset brackets to keep clamping the cam.

In another embodiment, the two reset brackets are respectively provided with a tooth-pattern portion corresponding to the linkage gear, and when the two reset brackets are static, the two tooth-pattern portions are respectively engaged with the linkage gear, so that the locking force is increased. Or through a pair of brake shoe linkage, and a third pin joint hole is respectively arranged on the base outside the two reset supports, and each brake shoe linkage comprises a pillar, a rotating shaft, a volute spring and a brake block, wherein the pillar is arranged on the rotating shaft, the pillar can be arranged on the third pin joint hole through the rotating shaft, the volute spring is sleeved on the rotating shaft, one end of the pillar is kept to abut against the outer side of the reset support, and the other end of the pillar is connected with the brake block, so that the brake block is kept to abut against the wheel hub to form a locking state, and the locking force is increased.

Therefore, the utility model utilizes the combination mode of the base, the cam, the two reset brackets and the linkage gear, and is installed between the wheel hub and the wheel shaft, thereby locking the wheel hub at the relative position of the wheel shaft, automatically entering a locking state when in rest, and being unlocked after being pushed to form a movable state, which can move smoothly no matter in front or back; furthermore, the utility model discloses further utilize these two supports that reset to be equipped with a profile of tooth portion respectively for this interlock gear to and this brake block linkage, form the use of more differences, and can use the occasion of various differences, in order to reach the efficiency that promotes the security when using by a wide margin.

Drawings

Fig. 1 is an exploded perspective view of the preferred embodiment of the present invention.

Fig. 2 is an assembled perspective view of the preferred embodiment of the present invention.

Fig. 3 is a schematic diagram illustrating a state of the locking device according to the preferred embodiment of the present invention.

Fig. 4 is a schematic view of the release state of the preferred embodiment of the present invention.

Fig. 5 is a schematic view of another elastic element according to a preferred embodiment of the present invention.

Fig. 6 is a schematic view of the locking state according to another preferred embodiment of the present invention.

Fig. 7 is a schematic view of the release state of another preferred embodiment of the present invention.

Description of reference numerals: 1-a static automatic braking structure of a wheel; 11-a base; 111-shaft hole; 112-mounting holes; 113-a first pivot hole; 114-a third pivot hole; 12-a cam; 121-a second pivot hole; 122-a projection; 123-a drive section; 124-mounting grooves; 125-mandril; 13-a reduction support; 131-a pivot joint end; 132-a free end; 133-a limit notch; 134-a serration; 14-linkage gear; 15-a limiting block; 16-a resilient element; 17-a resilient element; 18-a positioning block; 19-brake shoe connecting rod group; 191-a strut; 192-a rotation axis; 193-volute spring; 194-a brake pad; 2-wheel hub; 21-axle.

Detailed Description

For the purpose of making the content of the present invention clear, reference is made to the accompanying drawings and the following description.

Please refer to fig. 1, fig. 2, fig. 3 to fig. 4, and fig. 5, which are a perspective exploded view of the present invention, an assembled perspective view thereof, a state diagram of the present invention when the present invention is locked and released, and a setting diagram of another elastic element of the present invention. As shown in the following figures, the automatic braking structure 1 of the present invention is installed inside a wheel hub 2 and connected to a wheel axle 21 of the wheel hub 2, and the automatic braking structure 1 of the present invention includes a base 11, a cam 12, two reset brackets 13 and a linkage gear 14.

The base 11 is a disc-shaped structure and is fixed in the wheel hub 2, and the center of the base is provided with a shaft hole 111 corresponding to the wheel hub 2, and a plurality of mounting holes 112 and three first pivot holes 113 are provided around the shaft hole 111.

The center of the cam 12 is provided with a second pivot hole 121 for movably pivoting the cam in the first pivot hole 113, and the outer periphery of the cam 12 is provided with a protrusion 122 in a direction corresponding to the axial hole 111, and two driving portions 123 are respectively protruded at two symmetrical positions of the cam 12; it should be noted that, in the present embodiment, a mounting groove 124 is disposed on a surface of the cam 12 corresponding to the second pivot hole 121 for mounting a rod 125, and two ends of the rod 125 are respectively exposed to the periphery of the cam 12 to form the two driving portions 123.

The two repositioning brackets 13 are pivotally connected to the remaining two first pivoting holes 113 to form a pivoting end 131, the other ends of the two repositioning brackets 13 form a movable end 132, the two repositioning brackets 13 are oppositely disposed, so that the two repositioning brackets 13 rotate around the pivoting end 131 as a fulcrum, and the two repositioning brackets 13 are respectively provided with a limiting notch 133 corresponding to the two driving portions 123. The two reset brackets 13 are respectively provided with a toothed portion 134 relative to the interlocking gear 14, and the two toothed portions 134 are respectively engaged with the interlocking gear 14 when the two reset brackets are stationary.

The linkage gear 14 is fixed on the wheel shaft 21; accordingly, when the wheel is stationary, the two driving portions 123 respectively fall into the two position-limiting notches 133 to lock the wheel hub 2, and when the wheel rotates in the forward or reverse direction, the linking gear 14 drives the protruding portion 122 of the cam 12 to swing, so that the two driving portions 123 are disengaged from the two position-limiting notches 133 to push the two reset brackets 13 apart, and the wheel hub 2 is in a release moving state.

Furthermore, the utility model discloses a static type self-actuating brake structure 1 of this wheel still has a pair of stopper 15, and this each stopper 15 locates the outside of this each support 13 that resets, and this each stopper 15 is the L font to with this each support 13 suppression cladding in the inside of this each stopper 15 that resets.

In addition, the static automatic brake structure 1 of the wheel of the present invention further has an elastic element 16, and the elastic element 16 is respectively hooked on the movable end of the two reset brackets 13, so that the two reset brackets 13 keep clamping the cam 12.

As shown in fig. 5, the stationary automatic brake structure 1 of the present invention further has a pair of elastic elements 17 and a pair of positioning blocks 18, the two positioning blocks 18 are respectively disposed outside the two reset brackets 13 for respectively accommodating the elastic elements 17 therein, so that the other ends of the two elastic elements 17 respectively abut against the two reset brackets 13 to hold the cam 12.

Fig. 6 to 7 are schematic views of various states of the operation of another preferred embodiment of the present invention. As shown in the figure, the wheel-stationary automatic brake structure 1 further includes a pair of brake shoe linkage 19, and a third pivot hole 114 is respectively formed on the base 11 outside the two reset brackets 13, and each brake shoe linkage 19 includes a support column 191, a rotating shaft 192, a volute spring 193 and a brake pad 194, the support column 191 is mounted on the rotating shaft 192, the support column 191 can be mounted behind the third pivot hole 114 through the rotating shaft 192, the volute spring 193 is sleeved on the rotating shaft 192, so that one end of the support column 191 is kept abutting against the outside of the one reset bracket 13, and the other end of the support column 191 is connected with the brake pad 194, so that the brake pad 194 is kept abutting against the inside of the wheel hub 2 to form a locking state.

Accordingly, the present invention utilizes the combination of the base 11, the cam 12, the two reset brackets 13 and the linkage gear 14, and is installed between the wheel hub 2 and the wheel shaft 21, so as to lock the relative position of the wheel hub 2 on the wheel shaft 21, automatically enter a locked state when in rest, and unlock the wheel hub after being pushed to form a movable state, which can move forward or backward smoothly; furthermore, the utility model discloses further utilize two to reset support 13 and be equipped with a profile of tooth portion 134 respectively for this interlock gear 14 to and this brake shoe linkage 19, form more different using-way, and can use the occasion of various differences, in order to reach the efficiency that promotes the security when using by a wide margin.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A static automatic braking structure of a wheel, which is installed inside a wheel hub and connected to a wheel shaft of the wheel hub, the braking structure comprising:

a base, which is in a disc-shaped structure and is fixedly arranged in the wheel hub, the center of the base is provided with a shaft hole corresponding to the wheel hub, and the periphery of the shaft hole is provided with a plurality of mounting holes and three first pivoting holes;

a cam, the center of which is provided with a second pivot hole, the second pivot hole is movably pivoted with the first pivot hole, the periphery of the cam is provided with a convex part corresponding to the direction of the shaft hole, and two symmetrical positions of the cam are respectively convexly provided with a driving part;

two reset brackets, one end of each reset bracket is respectively pivoted with the two remaining first pivoting holes to form a pivoting end, the other ends of the two reset brackets form a movable end, the two reset brackets are arranged oppositely to each other, so that the two reset brackets can rotate by taking the pivoting ends as fulcrums, and the two reset brackets are respectively provided with a limit notch corresponding to the two driving parts; and

a linkage gear fixed on the wheel shaft;

when the wheel is static, the two driving parts respectively fall into the two limit notches to lock the wheel hub, and when the wheel rotates forwards or reversely, the linkage gear drives the protruding part of the cam to swing, so that the two driving parts are separated from the two limit notches to jack the two reset brackets, and the wheel hub is in a release moving state.

2. The structure as claimed in claim 1, wherein a mounting groove is formed at a position of the cam facing the second pivot hole for mounting a push rod, and two ends of the push rod are exposed to the periphery of the cam to form the two driving portions.

3. The automatic braking structure of claim 2, further comprising a pair of limiting blocks, wherein each limiting block is disposed on the outer side of each reset bracket, and each limiting block is L-shaped to press and cover each reset bracket inside the limiting block.

4. The structure as claimed in claim 3, further comprising an elastic member, wherein two ends of the elastic member are hooked to the movable ends of the two restoring brackets respectively, so that the two restoring brackets can hold the cam.

5. The structure as claimed in claim 3, further comprising a pair of resilient members and a pair of positioning blocks, wherein the pair of positioning blocks are respectively disposed outside the two restoring brackets for respectively receiving a resilient member, such that ends of the resilient members opposite to the positioning blocks respectively abut against the two restoring brackets to retain the cam.

6. The structure of claim 4 or 5, wherein the two reset brackets are respectively provided with a tooth-pattern portion corresponding to the linkage gear, and the tooth-pattern portions respectively engage with the linkage gear at rest.

7. The structure as claimed in claim 1, further comprising a pair of brake shoe linkage sets, and a third pivot hole is formed on the base outside the two reset brackets, and each brake shoe linkage set comprises a support post, a rotating shaft, a volute spring and a brake pad, the support post is mounted on the rotating shaft, the support post can be mounted on the third pivot hole through the rotating shaft, the volute spring is sleeved on the rotating shaft, one end of the support post is kept to abut against the outside of one reset bracket, and the other end of the support post is connected to the brake pad, so that the brake pad is kept to abut against the wheel hub to form a locked state.