CN203784160U - Stretching motivating device for automobile drum brake and drum brake - Google Patents
Stretching motivating device for automobile drum brake and drum brake Download PDFInfo
- Publication number
- CN203784160U CN203784160U CN201420184934.0U CN201420184934U CN203784160U CN 203784160 U CN203784160 U CN 203784160U CN 201420184934 U CN201420184934 U CN 201420184934U CN 203784160 U CN203784160 U CN 203784160U
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- brake
- circular arc
- stretching
- guiding element
- drum brake
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Abstract
The utility model discloses a stretching motivating device for an automobile drum brake and the drum brake comprising the stretching motivating device and belongs to the field of brake production. The stretching motivating device is characterized in that two symmetric radial deep grooves are formed in a center driving shaft head end, the bottoms of the grooves are provided with axial circular arc concaved faces, connection rods are inserted into the radial deep grooves in a connected mode, the two ends of each connection rod are circular arc convex faces, one end of each connection rod is matched with the corresponding axial circular arc concaved face in a sliding mode, the outer side of the center driving shaft head end is connected with a fixedly-arranged guiding part in a sleeved mode, the two ends of the guiding part are respectively provided with a guiding round hole, ejector rods matched with the guiding round holes in a sliding mode are arranged in the guiding round holes, one end of each ejector rod is a circular arc concaved face and is matched with the circular arc convex face at the outer end of the corresponding connection rod in a sliding mode, and the other end of each elector rod is a circular arc convex face. The top end of a brake shoe of the brake is provided with a stress arc face matched with the ejector rods in a sliding mode. Compared with the prior art, the stretching motivating device has the advantages of being large in stretching angle, flexible in stretching and returning and the like, and the drum brake has the advantages of being stable in braking, short in braking distance and the like.
Description
Technical field
The utility model relates to brake producing field, and specifically a kind of automobile drum brake is with actuating deploying device and drum brake.
Background technique
Existing automobile drum brake is mostly to promote two rollers 15 on two brake shoes 3 with the involute surface of central actuating shaft 6 head ends (or cam) to both sides, and then promote two support bearing pin 13 opposite direction rotatings of two brake shoes 3 on braking bottom board 8, outwards open.The friction plate 4 being arranged on brake shoe 3 outer arced surface is tightly pressed on the inner headed face of brake drum 1 of rotation, and frictionally reaches the object of car deceleration or parking.Central actuating shaft 6 and roller 15 are actuated deploying device (as shown in Figure 1) as it.The break of said structure, although simple in structure, because central actuating shaft is subject to the restriction of its involute structure, still have the following disadvantages: 1, central actuating shaft turns over same angle, and its lift is relatively too small.Once friction plate 4 serious wear, brake control power will reduce greatly, even brake failure.Can only lean on the corner of frequent adjustment central actuating shaft to make up wear extent.2, opening with return of brake shoe 3 is too slow, causes brake not in time and stopping distance is long, and braking is removed and thoroughly do not produced meaningless friction.3, the involute surface of central actuating shaft is that line contacts with the curved surface of roller 15, quick abrasion, after wearing and tearing, cause open, return resistance increase.4, consider the factor that central actuating shaft lift is relatively little, the friction plate 4 on brake shoe 3 and the gap of brake drum 1 can only be very little.This just causes a large amount of heat of friction generation not leave, and produces high temperature, causes " heat fade " of frictional force, causes brake failure.In addition high temperature causes the distortion of brake drum 1, has more aggravated meaningless friction.
For above-mentioned the deficiencies in the prior art, in the patent documentation that publication number is CN2545425Y, disclose a kind of on driving wheel the break with two-way push block, a kind of asymmetrical cam formula break is disclosed in the patent documentation that publication number is CN102878229A.Although above-mentioned two breaks have avoided existing its braking force of driving cam shaft type brake structure to be subject to the phenomenon that braking force diminishes after friction disc wear to a certain extent.But these two kinds of breaks are because the force bearing point on brake shoe is non-symmetry structure, do not reach the synchronous opening movement of two brake shoes at all, result is that a brake shoe contacts with brake drum, play braking object, another brake shoe cannot contact, do not have braking object, two brake shoes can not synchronous braking.
Summary of the invention
Technical assignment of the present utility model is for above-mentioned the deficiencies in the prior art, provide a kind of opening angle large, open return flexibly automobile drum brake with actuating deploying device.
The further technical assignment of the utility model is to provide and contains above-mentioned drum brake of actuating deploying device, and this break has the features such as braking is steady, braking distance is short.
Technical assignment of the present utility model is realized in the following manner: a kind of automobile drum brake is with actuating deploying device, comprise central actuating shaft, be characterized in that central actuating shaft head end is processed with two symmetrical radially deep trouths, radially deep trouth bottom land is processed with axial circular arc concave surface, radially deep trouth place is plugged with connecting rod, connecting rod two ends are arc convex surface, its insertion end and the radially axial circular arc concave surface of deep trouth bottom land are slidably matched, the outside of central actuating shaft head end is socketed with the guiding element being fixedly installed, guiding element two ends are respectively arranged with guiding circular hole, in guiding circular hole, be provided with the push rod being slidably matched with it, one end that push rod is positioned at guiding element is circular arc concave surface, and be slidably matched with connecting rod outer end arc convex surface, one end that push rod is positioned at guiding element outside is arc convex surface.
A kind of drum brake, comprise brake drum, braking bottom board, and be arranged on and actuate deploying device and two brake shoes on braking bottom board, the lower end of two brake shoes is hinged by supporting bearing pin and braking bottom board respectively, two brake shoe outer arced surface are all provided with friction plate, between two brake shoes, return spring is installed, actuates deploying device and be arranged between two brake shoes, be characterized in being provided with the deploying device of actuating claimed in claim 1 between the top of two brake shoes.
The structure of brake drum, braking bottom board and Placement thereof, the Placement of central actuating shaft, brake shoe and braking bottom board, and Placement between friction plate, return spring and brake shoe is known technology.
For brake shoe is better coordinated with the above-mentioned deploying device of actuating, can on the relative face in two brake shoe tops, stressed cambered surface be set respectively, push rod is positioned at the one end in guiding element outside and the stressed cambered surface on brake shoe top is slidably matched.
In order to ensure two brake shoe synchronous brakings, the axle center of the stressed cambered surface on two brake shoes is preferably arranged in same level.
Guiding element is fixedly connected with braking bottom board, can rely on link to be fixed on braking bottom board, also can be cast into one with braking bottom board.
Of the present utility modelly actuate deploying device and drum brake compared with prior art has following outstanding beneficial effect:
One, brake shoe opens, return is flexible, there is no catching phenomenon, brakes sensitive.
Two, central shaft drives and turns over same angle, and the opening angle of brake shoe obviously increases, and this just makes braking effect not be subject to the effect of attrition of friction plate.
Three, because brake shoe opening angle is large, it is larger that the gap between friction plate and brake drum on brake shoe can be designed, and this is conducive to heat radiation, avoids or alleviate the phenomenon of braking force " heat fade ".
Four,, when emergency braking, can ensure maximum braking moment and shorter braking distance.
Five, because of the leading role of guiding element, two brake shoes can ensure synchronous braking, thereby make braking steadily.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of drum brake in prior art;
Accompanying drawing 2 is structural representations of the utility model drum brake;
Accompanying drawing 3 is structural representations of the central actuating shaft of drum brake shown in Fig. 2;
Accompanying drawing 4 is that the A of central actuating shaft shown in Fig. 3 is to view;
Accompanying drawing 5 is structural representations of the guiding element of drum brake shown in Fig. 2;
Accompanying drawing 6 is B-B sectional views of guiding element shown in Fig. 5;
Accompanying drawing 7 is structural representations of the push rod of drum brake shown in Fig. 2;
Accompanying drawing 8 is that the C of push rod shown in Fig. 7 is to view;
Accompanying drawing 9 is structural representations of the connecting rod of drum brake shown in Fig. 2.
Embodiment
Actuate deploying device and drum brake be described in detail below with specific embodiment to of the present utility model with reference to Figure of description.
Embodiment:
Drum brake of the present utility model is mainly by brake drum 1, braking bottom board 2, brake shoe 3, friction plate 4, return spring 5 and actuate deploying device and form.
Brake drum 1 relies on rolling bearing to be slidably connected with Automobile shaft, and braking bottom board 2 relies on link to be fixedly connected with Automobile shaft.The lower end of two brake shoes 3 is hinged with braking bottom board 2 by supporting bearing pin 13 respectively.On the relative face in two brake shoe 3 tops, be processed with respectively stressed cambered surface 14.The axle center of two stressed cambered surfaces 14 is in same level.Two friction plates 4 are separately fixed on the outer arced surface of two brake shoes 3.Return spring 5 is fixedly connected between two brake shoes 3.Actuating deploying device is arranged between two brake shoe 3 tops.
The described deploying device of actuating is mainly made up of central actuating shaft 6, guiding element 7, connecting rod 8 and push rod 9.The head end that is arranged on the central actuating shaft 6 on braking bottom board 2 is processed with two symmetrical radially deep trouths 10.Radially the bottom land of deep trouth 10 is processed with axial circular arc concave surface 11.Described connecting rod 8, its two ends are arc convex surface, and insert radially in deep trouth 10 one end wherein and be slidably matched with the axial circular arc concave surface 11 of deep trouth 10 bottom lands radially.Described guiding element 7, entirety is socketed in the outside of central actuating shaft 6 head ends, and its bottom can rely on link to be fixed on braking bottom board 2, also can be cast into one with braking bottom board 2.Guiding element 7 two ends are processed with respectively guiding circular hole 12.Two push rods 9 are separately positioned in two guiding circular holes 12 and are slidably matched with it.One end that push rod 9 is positioned at guiding element 7 is processed as circular arc concave surface, is slidably matched with connecting rod 8 outer ends.One end that push rod 9 is positioned at guiding element 7 outsides is processed with arc convex surface, is slidably matched with the stressed cambered surface 14 on brake shoe top.
While stepping on brake, the powered central actuating shaft 6 of brake cylinder rotates, actuate push rod 9 axial motions by connecting rod 8 again, thereby two brake shoes 3 are opened, friction plate 4 on brake shoe 3 is just tightly pressed on the inner headed face of brake drum 1 of rotation like this, relies on frictional force make the vehicle deceleration travelling or stop.
Claims (5)
1. an automobile drum brake is with actuating deploying device, comprise central actuating shaft, it is characterized in that: central actuating shaft head end is processed with two symmetrical radially deep trouths, radially deep trouth bottom land is processed with axial circular arc concave surface, radially deep trouth place is plugged with connecting rod, connecting rod two ends are arc convex surface, its insertion end and the radially axial circular arc concave surface of deep trouth bottom land are slidably matched, the outside of central actuating shaft head end is socketed with the guiding element being fixedly installed, guiding element two ends are respectively arranged with guiding circular hole, in guiding circular hole, be provided with the push rod being slidably matched with it, one end that push rod is positioned at guiding element is circular arc concave surface, and be slidably matched with connecting rod outer end arc convex surface, one end that push rod is positioned at guiding element outside is arc convex surface.
2. a drum brake, comprise brake drum, braking bottom board, and be arranged on and actuate deploying device and two brake shoes on braking bottom board, the lower end of two brake shoes is hinged by supporting bearing pin and braking bottom board respectively, two brake shoe outer arced surface are all provided with friction plate, between two brake shoes, return spring is installed, actuates deploying device and be arranged between two brake shoes, it is characterized in that: between the top of two brake shoes, be provided with the deploying device of actuating claimed in claim 1.
3. break according to claim 2, is characterized in that: on the relative face in two brake shoe tops, be respectively equipped with stressed cambered surface, push rod is positioned at the one end in guiding element outside and the stressed cambered surface on brake shoe top is slidably matched.
4. break according to claim 3, is characterized in that: the axle center of the stressed cambered surface on two brake shoes is in same level.
5. break according to claim 4, is characterized in that: guiding element is fixedly connected with braking bottom board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420184934.0U CN203784160U (en) | 2014-04-17 | 2014-04-17 | Stretching motivating device for automobile drum brake and drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420184934.0U CN203784160U (en) | 2014-04-17 | 2014-04-17 | Stretching motivating device for automobile drum brake and drum brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203784160U true CN203784160U (en) | 2014-08-20 |
Family
ID=51320351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420184934.0U Withdrawn - After Issue CN203784160U (en) | 2014-04-17 | 2014-04-17 | Stretching motivating device for automobile drum brake and drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203784160U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899683A (en) * | 2014-04-17 | 2014-07-02 | 周广如 | Actuating expanding device for automobile drum brake and drum brake |
| CN107588124A (en) * | 2016-07-06 | 2018-01-16 | 泰州市扬帆车件有限公司 | A kind of lock that rises of low abrasion |
| CN109372914A (en) * | 2018-12-14 | 2019-02-22 | 潘凤春 | A kind of intelligent drum brake system for automobile |
| CN109899412A (en) * | 2019-04-12 | 2019-06-18 | 靖江市恒大汽车部件制造有限公司 | Self-adjustable crank drum brake |
| US10753413B2 (en) | 2018-04-30 | 2020-08-25 | Hyundai Motor Company | S-cam brake of horizontal transferring force type |
-
2014
- 2014-04-17 CN CN201420184934.0U patent/CN203784160U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899683A (en) * | 2014-04-17 | 2014-07-02 | 周广如 | Actuating expanding device for automobile drum brake and drum brake |
| CN107588124A (en) * | 2016-07-06 | 2018-01-16 | 泰州市扬帆车件有限公司 | A kind of lock that rises of low abrasion |
| CN107588124B (en) * | 2016-07-06 | 2023-11-24 | 泰州市扬帆车件有限公司 | Low-abrasion expansion brake |
| US10753413B2 (en) | 2018-04-30 | 2020-08-25 | Hyundai Motor Company | S-cam brake of horizontal transferring force type |
| CN109372914A (en) * | 2018-12-14 | 2019-02-22 | 潘凤春 | A kind of intelligent drum brake system for automobile |
| CN109372914B (en) * | 2018-12-14 | 2020-06-02 | 福建海工车桥制造有限公司 | Intelligent drum brake device for automobile |
| CN109899412A (en) * | 2019-04-12 | 2019-06-18 | 靖江市恒大汽车部件制造有限公司 | Self-adjustable crank drum brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20180410 |