CN114198434A - Swing arm type embedded expansion brake device - Google Patents
Swing arm type embedded expansion brake device Download PDFInfo
- Publication number
- CN114198434A CN114198434A CN202010988023.3A CN202010988023A CN114198434A CN 114198434 A CN114198434 A CN 114198434A CN 202010988023 A CN202010988023 A CN 202010988023A CN 114198434 A CN114198434 A CN 114198434A
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- swing arm
- wheel body
- brake
- swing
- brake shoes
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- 230000009471 action Effects 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 abstract description 8
- 230000001133 acceleration Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
- F16D51/10—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as exclusively radially-movable brake-shoes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to the technical field of brakes, in particular to a swing arm type embedded expansion brake device. The device comprises a wheel body and at least two brake shoes, wherein the wheel body is articulated with a plurality of swing arms, and the swing arms are uniformly distributed around the circumferential direction of the wheel body; one end of the swing arm is hinged with the wheel body, and the other end of the swing arm swings back and forth to penetrate through the maximum outer diameter of the wheel body; the brake shoes are distributed around the circumference direction of the wheel body and are integrally in an annular structure; tension springs are connected between the end parts of every two brake shoes, the two ends of each tension spring are respectively clamped at the end parts of the two brake shoes, and the tension springs are always kept in a stretching state. The wheel body rotates, and the swing arm swings under the action of centrifugal force, so that each brake shoe is jacked and every two brake shoes are propped open, the annular outer diameter of each brake shoe is increased, and braking is performed. The self-starting brake device provided by the invention is used as a self-starting brake device, when the rotating acceleration is too fast, the generated centrifugal force is increased, the swing arm swings against the rotating direction of the wheel body, and the brake shoe is automatically ejected out and spread to brake, so that the effect of speed reduction or speed limitation is achieved in time.
Description
Technical Field
The invention relates to the technical field of brakes, in particular to a swing arm type embedded expansion brake device.
Background
A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member (or a moving machine), and is a machine component that stops or decelerates a moving member in a machine. In the field of automobiles or other safety devices, brakes are commonly used, and at present, the types of brakes on the market are various, and the types of brakes adopted in different use situations are not many.
Chinese patent publication No. CN107830082A discloses a simple balance brake in 23.03.2018, which is a brake for a vehicle, and uses the rotation of a cam to push a brake shoe for braking. However, this brake mainly performs active braking, and requires manual operation to perform braking.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a swing arm type embedded expansion brake device, which utilizes the centrifugal force in rotation to swing and eject a swing arm in high-speed rotation so as to prop open mutually embedded brake shoes and brake in time, thereby achieving the effects of speed reduction and speed limitation.
In order to solve the technical problems, the invention adopts the technical scheme that:
a swing arm type embedded expansion brake device comprises a wheel body and at least two brake shoes, wherein the wheel body is hinged with a plurality of swing arms, and the swing arms are uniformly distributed around the circumferential direction of the wheel body; one end of the swing arm is hinged with the wheel body, and the other end of the swing arm swings back and forth to penetrate through the maximum outer diameter of the wheel body. The brake shoes are arranged around the circumference of the wheel body and are integrally in an annular structure; the tension springs are connected between the end parts of every two brake shoes, the two ends of each tension spring are respectively clamped at the end parts of the two brake shoes, and the tension springs are always kept in a stretching state.
The wheel body rotates, and the swing arm swings under the action of centrifugal force to push each brake shoe and strut the brake shoes pairwise, so that the annular outer diameter of each brake shoe is increased, and braking is performed; the swinging direction of the swing arm is opposite to the rotating direction of the wheel body. When the wheel body is used, the wheel body is connected with the external rotating shaft and synchronously rotates. When the wheel body rotates at a high speed, the brake shoes tend to expand outwards under the action of centrifugal force, and meanwhile, the swing arms on the wheel body swing against the rotating direction of the wheel body under the action of centrifugal force, so that the brake shoes are jacked to be propped open, and the brake shoes are braked. When the rotating speed is reduced, the centrifugal force action is reduced, the tension of the tension spring of the brake shoe is reset, and the braking effect is weakened.
Preferably, the end of the brake shoe is provided with a tension spring hole for accommodating a tension spring, and the inner diameter of the tension spring hole is larger than the maximum outer diameter of the tension spring. The tension spring holes at the ends of the two cooperating brake shoes are centrally aligned for placement of the tension springs.
As one preferable scheme, a clamping block used for clamping the end part of the tension spring is arranged in the tension spring hole. The fixture blocks are arranged in the tension spring holes, and two ends of each tension spring hole are respectively clamped on the fixture blocks in the tension spring holes at the end parts of the two brake shoes.
As a preferable mode, the brake shoe is in a circular arc shape, and the end parts of the two brake shoes which are connected with each other are embedded; the outer side of the end part of the brake shoe extends along the arc direction to form a matching block, and the inner side of the end part is contracted along the arc direction to form a matching groove; the outer side of the end part of the brake shoe which is matched and connected with the brake shoe is provided with a matching groove along the arc direction in a shrinking mode, and the inner side of the end part is provided with a matching block along the arc direction in an extending mode; the matching block is matched with the matching groove in size.
The end parts of the two brake shoes are embedded and assembled, so that the appearance is more attractive, the sharp angle on the structure is reduced, and the scratch and the cut are avoided. Under the action of the tension spring, the matching blocks of the two brake shoes are mutually embedded with the matching grooves. The brake shoes matched in the form have small mutual friction resistance, can be unfolded to brake by overcoming the tension of the tension spring, and is convenient to reset.
As one preferable scheme, the swing arms are arranged in a central symmetry mode, and the symmetry center is the center of a circle of the wheel body. All the swing arms are uniformly and symmetrically arranged, and swing and eject to the inner wall of the brake shoe under the action of centrifugal force to push the brake shoe open.
As one of the preferred scheme, the swing arm is the bar structure, and the swing one end of swing arm is equipped with the kicking block, kicking block weight is greater than the weight of the articulated one end of swing arm. The swing arm is designed into a strip-shaped structure suitable for swinging, wherein the weight of the top block at the swinging end accounts for more than half of the total weight of the swing arm, and the swinging trend is more obvious under the action of centrifugal force.
As one preferable scheme, the wheel body is provided with a swinging cavity for the swinging arm to swing freely, and one side of the swinging cavity, which is intersected with the outer diameter of the wheel body, is hollowed; the number of the swing cavities corresponds to that of the swing arms one by one, and the swing cavities are mutually independent; and a fixed shaft for hinging the swing arm is fixed on the swing cavity. Wherein, the swing chamber provides the space of swing arm swing, has also retrained the swing range of swing arm simultaneously. The swinging cavity is an open structure, and one side of the swinging cavity, which is intersected with the outer diameter of the wheel body, is hollowed out so that the swinging arm can swing out.
As one of preferable schemes, the top block is a cylindrical structure or a spherical structure. The outer edge of the ejector block is generally an arc surface, so that the friction force in the ejection process is reduced conveniently.
As a preferable scheme, the brake device further comprises two side outer covers, wherein the outer covers cover the two axial sides of the wheel body and clamp the brake shoes; the outer cover is clamped and fixed with the wheel body. The outer cover covers the wheel body and the two side surfaces of the brake shoe, and radial movement of the ejector block and the brake shoe is not influenced.
Preferably, the circumferential outer wall of the brake shoe is provided with a friction plate. The friction plate is a commonly used part of the existing brake and is mainly used for enhancing the braking effect and the wear resistance of the brake shoe.
Compared with the prior art, the invention has the beneficial effects that: the invention discloses a swing arm type embedded expansion brake device which can be used as a self-starting brake device, when the rotating acceleration is too fast, the generated centrifugal force is increased, a swing arm swings against the rotating direction of a wheel body, and automatically ejects and props up a brake shoe for braking, so that the effect of speed reduction or speed limitation is achieved in time, and human errors are reduced. The brake shoes are assembled in an embedded mode, so that the friction resistance is smaller when the brake shoes are unfolded, and the braking effect is more sensitive.
Drawings
Fig. 1 is a front view of the overall structure of the present invention.
FIG. 2 is an overall view of embodiment 1.
FIG. 3 is a schematic view of the state of use of example 1.
Fig. 4 is an exploded view of the assembly of the brake shoe end of example 1.
Fig. 5 is a structural view of a brake shoe of embodiment 1.
FIG. 6 is an internal structural view of embodiment 1.
Fig. 7 is a schematic assembly view of a brake shoe according to embodiment 2.
The brake shoe comprises a wheel body 1, a swinging cavity 11, a fixing shaft 12, a brake shoe 2, a matching block 21, a matching groove 22, an outer cover 3, a friction plate 4, a tension spring 5, a tension spring hole 51, a clamping block 52, a swinging arm 6 and a jacking block 61.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Example 1
As shown in fig. 1-3, the present invention provides a swing arm type embedded expansion brake device, which comprises a wheel body 1, two brake shoes 2 and two side outer covers 3, wherein the two brake shoes 2 are semicircular, the two brake shoes 2 are arranged around the wheel body 1 in the circumferential direction to form an annular structure, tension springs 5 are connected between the end portions of every two brake shoes 2, two ends of each tension spring 5 are respectively clamped to the end portions of the two brake shoes 2, and the tension springs 5 are always kept in a tension state. Meanwhile, the circumferential outer wall of the brake shoe 2 is provided with a friction plate 4.
Specifically, as shown in fig. 4-5, the end of the brake shoe 2 is provided with a tension spring hole 51 for accommodating the tension spring 5, the tension spring hole 51 is located at the center of the end, the inner diameter of the tension spring hole 51 is larger than the maximum outer diameter of the tension spring 5, and a latch 52 for latching the end of the tension spring 5 is further arranged in the tension spring hole 51.
In addition, on two connected brake shoes 2, the outer side of the end of one brake shoe 2 extends along the arc direction to form a matching block 21, the inner side of the end is provided with a matching groove 22 in a shrinking mode along the arc direction, the outer side of the end of the brake shoe 2 matched and connected with the end is provided with a matching groove 22 in a shrinking mode along the arc direction, the inner side of the end is provided with a matching block 21 in an extending mode along the arc direction, and the matching block 21 is matched with the matching groove 22 in size. The ends of the two brake shoes 2 are fitted to each other by the engaging block 21 and the engaging groove 22 under the tensile force of the tension spring 5.
In this embodiment, as shown in fig. 5, six swing arms 6 are hinged to the wheel body 1, and each swing arm 6 is uniformly distributed around the circumferential direction of the wheel body 1 and is arranged in a central symmetry manner, where the symmetry center is the center of the circle of the wheel body 1. Specifically, the wheel body 1 is provided with a swing cavity 11 for the swing arm 6 to swing freely, a fixed shaft 12 for hinging the swing arm 6 is fixed in the swing cavity 11, and the side of the swing cavity 11, which is intersected with the outer diameter of the wheel body 1, is hollowed out so that the swing arm 6 swings out. Moreover, the number of the swing cavities 11 corresponds to that of the swing arms 6 one by one, and the swing cavities 11 are independent of each other, so that the swing space of the swing arms 6 is provided, and meanwhile, the swing range of the swing arms 6 is restrained, so that the swing arms 6 swing to penetrate through the maximum outer diameter of the wheel body 1 under the action of centrifugal force.
In this embodiment, swing arm 6 is bar structure, and swing arm 6's one end is articulated with fixed axle 12, and wobbling one end then is equipped with the kicking block 61 of cylindrical structure, and kicking block 61 weight is greater than the weight of the articulated one end of swing arm 6, and specifically, kicking block 61 weight accounts for more than half of the swing arm 6 total weight, and under the effect of centrifugal force, the swing trend is more obvious.
In this embodiment, under the condition that the wheel body 1 rotates clockwise in an accelerated manner, the swing arm 6 on the wheel body 1 swings counterclockwise under the action of centrifugal force, so as to push the brake shoes 2, so that the brake shoes 2 are spread for braking, and then automatically retract and reset under elasticity, so that braking or deceleration can be automatically performed under emergency conditions, additional manual control is not required, and the control effect is better, as shown in fig. 3-4. Under other conditions, the rotation angle of the swing arm 6 can be changed by changing the position of the fixed shaft 12 to adapt to clockwise braking or counterclockwise braking, and such structural adjustment is foreseeable in the art, and therefore the present embodiment is not specifically described.
Specifically, as shown in fig. 2, the two-side covers 3 cover the two axial sides of the wheel body 1 and clamp the brake shoes 2, and the covers 3 cover both sides of the wheel body 1 and the brake shoes 2 in this embodiment. Simultaneously, enclosing cover 3 is fixed with wheel body 1 joint, and the axle hole all is left at the center of wheel body 1, enclosing cover 3, and the axle hole mainly used wheel body 1, enclosing cover 3 and outside pivot synchronous connection.
The specific process is as follows: when the rotational acceleration of the wheel body 1 reaches a certain value, the generated centrifugal force also reaches the trigger point of the braking device, and the brake shoe 2 tends to expand outwards under the action of the centrifugal force. At this time, the swing arm 6 on the wheel body 1 swings against the rotation direction of the wheel body 1 under the action of centrifugal force, and the ejector blocks 61 on the swing arm 6 push each brake shoe 2 and push the brake shoes 2 apart in pairs, so that the annular outer diameter of the brake shoes 2 is increased, and deceleration and braking are performed.
When the brake shoe 2 is spread, the tension spring 5 is pulled open, and the engagement piece 21 and the engagement groove 22 at the end of the brake shoe 2 are separated. When the rotation acceleration of the wheel body 1 is reduced, the centrifugal force of the swing arm 6 is reduced, the end part matching block 21 and the matching groove 22 are re-embedded and reset under the pulling force of the tension spring 5 of the brake shoe 2, and the brake shoe 2 is folded and reset.
Example 2
The embodiment also provides a swing arm 6 type embedded expansion brake device, the braking principle and the structure are similar to those of the embodiment 1, the difference is that the number of the brake shoes 2 in the embodiment is more than two, the brake shoes 2 are arc-shaped, the end parts of the brake shoes 2 are connected end to end through tension springs 5 to form an annular structure, and as shown in fig. 7, when braking is carried out, the brake shoes 2 are pushed by the swing arm 6 and are simultaneously outwards spread to brake.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a swing arm formula gomphosis extension arresting gear which characterized in that: the brake shoe comprises a wheel body and at least two brake shoes, wherein the wheel body is hinged with a plurality of swing arms, and the swing arms are uniformly distributed around the circumferential direction of the wheel body; one end of the swing arm is hinged with the wheel body, and the other end of the swing arm swings back and forth to penetrate through the maximum outer diameter of the wheel body;
the brake shoes are arranged around the circumference of the wheel body and are integrally in an annular structure; tension springs are connected between the end parts of every two brake shoes, two ends of each tension spring are respectively clamped at the end parts of the two brake shoes, and the tension springs are always kept in a stretching state;
the wheel body rotates, the swing arm swings under the action of centrifugal force to push each brake shoe, tension of the tension spring is overcome, and the brake shoes are propped open pairwise, so that the annular outer diameter of each brake shoe is increased, and braking is performed;
the swinging direction of the swing arm is opposite to the rotating direction of the wheel body.
2. The swing arm type fitting expansion brake device according to claim 1, wherein: the end part of the brake shoe is provided with a tension spring hole for accommodating a tension spring, and the inner diameter of the tension spring hole is larger than the maximum outer diameter of the tension spring.
3. The rotary extension brake apparatus of claim 2, wherein: and a clamping block used for clamping the end part of the tension spring is arranged in the tension spring hole.
4. The swing arm type fitting expansion brake device according to claim 3, wherein: the brake shoes are arc-shaped, and the end parts of the two brake shoes which are connected with each other are embedded; the outer side of the end part of the brake shoe extends along the arc direction to form a matching block, and the inner side of the end part is contracted along the arc direction to form a matching groove; the outer side of the end part of the brake shoe which is matched and connected with the brake shoe is provided with a matching groove along the arc direction in a shrinking mode, and the inner side of the end part is provided with a matching block along the arc direction in an extending mode; the matching block is matched with the matching groove in size.
5. The swing arm type fitting expansion brake device according to claim 1 or 4, wherein: the swing arms are arranged in a central symmetry mode, and the symmetry center is the circle center of the wheel body.
6. The swing arm type fitting expansion brake device according to claim 5, wherein: the swing arm is bar structure, and the swing one end of swing arm is equipped with the kicking block, kicking block weight is greater than the weight of the articulated one end of swing arm.
7. The swing arm type fitting expansion brake device according to claim 6, wherein: the wheel body is provided with a swing cavity for the swing arm to swing freely, and one side of the swing cavity, which is intersected with the outer diameter of the wheel body, is hollowed; the number of the swing cavities corresponds to that of the swing arms one by one, and the swing cavities are mutually independent; and a fixed shaft for hinging the swing arm is fixed on the swing cavity.
8. The swing arm type fitting expansion brake device according to claim 7, wherein: the top block is of a cylindrical structure or a spherical structure.
9. The swing arm type engagement expansion brake device according to any one of claims 1 to 8, wherein: the outer covers cover the two axial sides of the wheel body and clamp the brake shoes; the outer cover is clamped and fixed with the wheel body.
10. The swing arm type fitting expansion brake device according to claim 9, wherein: and friction plates are arranged on the circumferential outer wall of the brake shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010988023.3A CN114198434B (en) | 2020-09-18 | 2020-09-18 | Swing arm type embedded expansion braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010988023.3A CN114198434B (en) | 2020-09-18 | 2020-09-18 | Swing arm type embedded expansion braking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114198434A true CN114198434A (en) | 2022-03-18 |
| CN114198434B CN114198434B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010988023.3A Active CN114198434B (en) | 2020-09-18 | 2020-09-18 | Swing arm type embedded expansion braking device |
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| CN (1) | CN114198434B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0842369A1 (en) * | 1995-08-22 | 1998-05-20 | Tensator Limited | Speed governor for a rotational drive |
| US20020046815A1 (en) * | 1999-12-01 | 2002-04-25 | Naoya Taniguchi | Emergency brake mechanism |
| CN103615482A (en) * | 2013-12-03 | 2014-03-05 | 北京航空航天大学 | Micro-miniature type mechanical centrifugal friction speed limiter |
| CN110454520A (en) * | 2019-07-22 | 2019-11-15 | 高邮市顺达动力机电有限公司 | A kind of novel three brake-shoes drum brake mechanism |
-
2020
- 2020-09-18 CN CN202010988023.3A patent/CN114198434B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0842369A1 (en) * | 1995-08-22 | 1998-05-20 | Tensator Limited | Speed governor for a rotational drive |
| US20020046815A1 (en) * | 1999-12-01 | 2002-04-25 | Naoya Taniguchi | Emergency brake mechanism |
| CN103615482A (en) * | 2013-12-03 | 2014-03-05 | 北京航空航天大学 | Micro-miniature type mechanical centrifugal friction speed limiter |
| CN110454520A (en) * | 2019-07-22 | 2019-11-15 | 高邮市顺达动力机电有限公司 | A kind of novel three brake-shoes drum brake mechanism |
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| Publication number | Publication date |
|---|---|
| CN114198434B (en) | 2024-03-26 |
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