CN114198434B - Swing arm type embedded expansion braking device - Google Patents
Swing arm type embedded expansion braking device Download PDFInfo
- Publication number
- CN114198434B CN114198434B CN202010988023.3A CN202010988023A CN114198434B CN 114198434 B CN114198434 B CN 114198434B CN 202010988023 A CN202010988023 A CN 202010988023A CN 114198434 B CN114198434 B CN 114198434B
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- wheel body
- swing arm
- swing
- brake
- brake shoes
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- 230000009471 action Effects 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 abstract description 9
- 230000001133 acceleration Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 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
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage 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
- 208000014674 injury Diseases 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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 hinged with a plurality of swing arms, and each swing arm is 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 pass through the maximum outer diameter of the wheel body; the brake shoes are distributed around the circumference of the wheel body and are of an annular structure as a whole; 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 every two brake shoes, and the tension springs always keep a stretching state. The wheel body rotates, and the swing arms swing under the action of centrifugal force, so that each brake shoe is jacked and spread in pairs, and the annular outer diameter of the brake shoes is increased to brake. 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 self-starting type braking device automatically ejects and props the brake shoes to brake, so that the effect of decelerating or limiting speed 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 part (or a moving machine), and is a mechanical component for stopping or decelerating a moving part in the machine. In the field of automobiles and other safety devices, the use of brakes is quite common, and currently, the types of brakes on the market are various, and the types adopted in different use scenes are not more.
Chinese patent publication No. CN107830082a discloses a simple balance brake in 2018, 03 and 23, which is a brake for vehicles, and uses the rotation form of a cam to push a brake shoe to brake. 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 effect in rotation to swing and eject a swing arm in high-speed rotation to prop out mutually embedded brake shoes so as to timely implement braking, thereby achieving the effect of speed reduction and speed limitation.
In order to solve the technical problems, the invention adopts the following technical scheme:
the swing arm type embedded expansion braking device comprises a wheel body and at least two braking 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 of an annular structure as a whole; 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 every two brake shoes, and the tension springs are always kept in a stretching state.
The wheel body rotates, the swing arms swing under the action of centrifugal force, and then each brake shoe is jacked up and spread in pairs, so that the annular outer diameter of the brake shoes is increased, and braking is carried out; the swing direction of the swing arm is opposite to the rotation direction of the wheel body. When in use, 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 rotation direction of the wheel body under the action of centrifugal force, so that the brake shoes are pushed and spread to brake. When the rotation speed is reduced, the centrifugal force effect is reduced, the tension spring of the brake shoe is reset, and the braking effect is reduced.
As one preferable scheme, 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. The centers of the tension spring holes of the two matched brake shoe ends are aligned so as to place the tension springs.
As one preferable scheme, a clamping block for clamping the end part of the tension spring is arranged in the tension spring hole. The clamping blocks are arranged in the tension spring holes, and two ends of the tension spring holes are respectively clamped on the clamping blocks of the tension spring holes at the end parts of the two brake shoes.
As one preferable scheme, 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 in fit connection with the brake shoe is contracted with a fit groove along the circular arc direction, and the inner side of the end part extends with a fit block along the circular arc direction; the size of the matching block is matched with that of the matching groove.
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 cutting injury are avoided. Under the action of the tension springs, the matching blocks and the matching grooves of the two brake shoes are mutually embedded. The matched brake shoes have small friction resistance, and can be used for supporting the brake by overcoming the tension of the tension spring, and the brake shoes are convenient to reset.
As one preferable scheme, the swing arms are arranged in a central symmetry way, and the center of symmetry is the center of the wheel body. The swing arms are uniformly and symmetrically arranged, and are swung and ejected to the inner wall of the brake shoe under the action of centrifugal force, so that the brake shoe is propped up.
As one preferable scheme, the swing arm is of a strip-shaped structure, a top block is arranged at one swing end of the swing arm, and the weight of the top block is larger than that of one hinged end of the swing arm. The swing arm is designed into a strip-shaped structure suitable for swinging, wherein the weight of a 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 swinging the swinging arm freely, and one side of the swinging cavity intersecting 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; the swing cavity is fixed with a fixed shaft for hinging the swing arm. The swing cavity provides a space for the swing arm to swing, and meanwhile, the swing range of the swing arm is restrained. The swing cavity is of an open structure, and one side of the swing cavity, which is intersected with the outer diameter of the wheel body, is hollowed out so that the swing arm swings out.
As one preferable scheme, the top block is of a cylindrical structure or a spherical structure. The outer edge of the ejector block is generally an arc surface, so that friction force in the ejection process is reduced conveniently.
As one 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 each brake shoe; the outer cover is fixedly clamped with the wheel body. The outer cover covers the two sides of the wheel body and the brake shoe, so that the radial movement of the top block and the brake shoe is not influenced.
As one preferable scheme, the circumferential outer wall of the brake shoe is provided with a friction plate. The friction plate is a common component 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 braking device which can be used as self-starting braking equipment, when the rotation acceleration is too fast, the generated centrifugal force is increased, a swing arm swings against the rotation direction of a wheel body, and automatically ejects and props up a brake shoe to brake, so that the effect of decelerating or limiting the speed is achieved in time, and human errors are reduced. The brake shoes are assembled in a jogged mode, so that when the brake shoes are unfolded, the friction resistance is smaller, 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 example 1.
Fig. 3 is a schematic view of the use state of embodiment 1.
Fig. 4 is an assembled exploded view of the brake shoe end of example 1.
Fig. 5 is a block diagram of a brake shoe according to embodiment 1.
Fig. 6 is an internal structural diagram of embodiment 1.
FIG. 7 is a schematic illustration of an assembled brake shoe of example 2.
The wheel comprises a wheel body 1, a swinging cavity 11, a fixed 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 present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.
Example 1
As shown in fig. 1-3, the invention provides a swing arm type embedded expansion brake device, which comprises a wheel body 1, two brake shoes 2 and two outer covers 3, wherein the two brake shoes 2 are semicircular, the two brake shoes 2 are arranged around the circumferential direction of the wheel body 1 to form an annular structure, tension springs 5 are connected between the end parts of the two brake shoes 2, the two ends of the tension springs 5 are respectively clamped at the end parts of the two brake shoes 2, and the tension springs 5 are always kept in a stretching state. Meanwhile, friction plates 4 are arranged on the circumferential outer wall of the brake shoe 2.
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 clamping block 52 for clamping the end of the tension spring 5 is further arranged in the tension spring hole 51.
In addition, on two brake shoes 2 that interconnect, the tip outside of one brake shoe 2 extends along the circular arc direction has cooperation piece 21, and the tip inboard is in circular arc direction to be drawn in to have cooperation groove 22, and the tip outside of the brake shoe 2 that cooperates with it is in circular arc direction to be drawn in to have cooperation groove 22, and the tip inboard extends along the circular arc direction has cooperation piece 21, and cooperation piece 21 matches with cooperation groove 22's size. Under the pulling force of the tension spring 5, the end parts of the two brake shoes 2 are mutually embedded through the matching blocks 21 and the matching grooves 22.
In this embodiment, as shown in fig. 5, six swing arms 6 are hinged on the wheel body 1, each swing arm 6 is uniformly distributed around the circumferential direction of the wheel body 1, and is centrally and symmetrically arranged, and the center of symmetry is the center 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 one side of the swing cavity 11 intersecting 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, the swing cavities 11 are mutually independent, the space for the swing arms 6 to swing is provided, and meanwhile the swing range of the swing arms 6 is restrained, so that the swing arms 6 swing to pass through the maximum outer diameter of the wheel body 1 under the action of centrifugal force.
In this embodiment, the swing arm 6 has a bar-shaped structure, one end of the swing arm 6 is hinged to the fixed shaft 12, one end of the swing arm is provided with a top block 61 having a cylindrical structure, the weight of the top block 61 is greater than that of the hinged end of the swing arm 6, specifically, the weight of the top block 61 occupies more than half of the total weight of the swing arm 6, and the swing trend is more obvious under the action of centrifugal force.
In this embodiment, under the condition that the wheel body 1 rotates clockwise in an acceleration manner, the swing arm 6 on the wheel body 1 swings counterclockwise under the action of centrifugal force, so that the brake shoes 2 are pushed to be spread, the brake shoes 2 are braked, and then the brake shoes are automatically folded and reset under elasticity, so that the brake or the deceleration can be automatically implemented under emergency conditions, the additional manual control is not needed, and the control effect is better, as shown in fig. 3-4. In other conditions, the rotation angle of the swing arm 6 can be changed by changing the position of the fixed shaft 12, adapting to a clockwise braking or a counter-clockwise braking, such structural adjustment being foreseen in the art and therefore not described in detail in this implementation.
Specifically, as shown in fig. 2, the outer covers 3 on both sides cover both sides of the wheel body 1 in the axial direction, and clamp each brake shoe 2, and in this embodiment, the outer covers 3 cover both sides of the wheel body 1 and the brake shoes 2. Simultaneously, enclosing cover 3 and wheel body 1 joint are fixed, and wheel body 1, the center of enclosing cover 3 all leaves the shaft hole, and the shaft hole mainly used wheel body 1, enclosing cover 3 are connected with outside pivot synchronization.
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 arms 6 on the wheel body 1 swing against the rotation direction of the wheel body 1 under the action of centrifugal force, and the ejector blocks 61 on the swing arms 6 push each brake shoe 2 and prop the brake shoes 2 apart from each other, so that the annular outer diameter of the brake shoes 2 is increased, and the speed is reduced and braked.
When the brake shoe 2 is opened, the tension spring 5 is pulled, and the end part of the brake shoe 2 is separated from the matching block 21 and the matching groove 22. 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 of the brake shoe 2 are re-embedded and reset under the tension of the tension spring 5, and the brake shoe 2 is folded and reset.
Example 2
The present embodiment also provides a swing arm 6 type embedded expansion brake device, and the brake principle and structure are similar to those of embodiment 1, and the difference is that the number of the brake shoes 2 in the present embodiment is more than two, the brake shoes 2 are circular arc, the end parts of each brake shoe 2 are connected end to end through the tension spring 5 to form an annular structure, as shown in fig. 7, when braking, each brake shoe 2 is pushed by the swing arm 6 and simultaneously is outwards opened to brake.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. A swing arm type embedded expansion braking device is characterized in that: the wheel body is hinged with a plurality of swing arms, and each swing arm is 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 of an annular structure as a whole; 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 every two brake shoes, and the tension springs are always kept in a stretched state;
the wheel body rotates, the swing arms swing under the action of centrifugal force, and then each brake shoe is jacked up to overcome the tension of the tension springs and enable the brake shoes to be spread in pairs, so that the annular outer diameter of the brake shoes is increased, and braking is carried out;
the swing direction of the swing arm is opposite to the rotation direction of the wheel body;
the swing arm is of a strip-shaped structure, a jacking block is arranged at one swing end of the swing arm, and the weight of the jacking block is larger than that of one hinged end of the swing arm; the wheel body is provided with a swing cavity for the swing arm to swing freely, and one side of the swing cavity intersecting 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; the swing cavity is fixed with a fixed shaft for hinging the swing arm; the top block is of a cylindrical structure or a spherical structure.
2. The swing arm type chimeric extension brake 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 swing arm type chimeric extension brake according to 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. A swing arm type chimeric extension brake 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 in fit connection with the brake shoe is contracted with a fit groove along the circular arc direction, and the inner side of the end part extends with a fit block along the circular arc direction; the size of the matching block is matched with that of the matching groove.
5. The swing arm type chimeric extension brake according to claim 1 or 4, wherein: the swing arms are arranged in a central symmetry mode, and the center of symmetry is the center of the wheel body.
6. The swing arm type chimeric extension brake according to any one of claims 1 to 5, wherein: the brake shoe is characterized by further comprising two outer covers, wherein the outer covers cover the two axial sides of the wheel body and clamp each brake shoe; the outer cover is fixedly clamped with the wheel body.
7. The swing arm type chimeric extension brake according to claim 6, wherein: 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 CN114198434A (en) | 2022-03-18 |
| CN114198434B true 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0842369A1 (en) * | 1995-08-22 | 1998-05-20 | Tensator Limited | Speed governor for a rotational drive |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001159434A (en) * | 1999-12-01 | 2001-06-12 | Wakayama Nainenki Co Ltd | Emergency brake device |
-
2020
- 2020-09-18 CN CN202010988023.3A patent/CN114198434B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0842369A1 (en) * | 1995-08-22 | 1998-05-20 | Tensator Limited | Speed governor for a rotational drive |
| 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 |
|---|---|
| CN114198434A (en) | 2022-03-18 |
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