CN105972123A - Drum brake - Google Patents

Drum brake Download PDF

Info

Publication number
CN105972123A
CN105972123A CN201610607317.0A CN201610607317A CN105972123A CN 105972123 A CN105972123 A CN 105972123A CN 201610607317 A CN201610607317 A CN 201610607317A CN 105972123 A CN105972123 A CN 105972123A
Authority
CN
China
Prior art keywords
brake
shoe
friction plate
arc groove
arc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610607317.0A
Other languages
Chinese (zh)
Inventor
李满乃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhaoqing Hi-Tech Zone Yingshun Auto Design Co Ltd
Original Assignee
Zhaoqing Hi-Tech Zone Yingshun Auto Design Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhaoqing Hi-Tech Zone Yingshun Auto Design Co Ltd filed Critical Zhaoqing Hi-Tech Zone Yingshun Auto Design Co Ltd
Priority to CN201610607317.0A priority Critical patent/CN105972123A/en
Publication of CN105972123A publication Critical patent/CN105972123A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/16Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
    • F16D51/18Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes

Abstract

The invention discloses a drum brake which comprises a brake wheel, a first brake shoe and a second brake shoe. The second brake shoe is hinged to an outer machine frame. A protrusion is arranged on the first brake shoe and provided with a brake wheel cylinder. A piston of the brake wheel cylinder can abut against the protrusion when extending. A first arc-shaped groove is formed in the first brake shoe. A second arc-shaped groove is formed in the second brake shoe. An ejector rod is arranged between the first arc-shaped groove and the second arc-shaped groove. A tension spring is arranged between the first brake shoe and the second brake shoe. The friction coefficients of a first friction plate and a second friction plate are gradually increased from the end close to the tension spring to the end close to the ejector rod.

Description

A kind of drum brake
Technical field
The present invention relates to brake, be specially a kind of drum brake.
Background technology
Brake is that automotive brake is except each in order to produce the parts of the power hindering vehicle motion or movement tendency in brakes Plant outside retarding device, be nearly all the friction system of the friction generation braking moment utilizing retaining element with rotating element manipulation surface Dynamic device, at present, the widely used friction brake of all kinds of automobiles is divided into drum brake and disc type according to the difference rotating element The big class of brake two.
The brake force that on the brake-shoe of drum brake, each point provides is uneven, and its friction disc wear is asynchronous, so, makes whole The brake efficiency of individual brake-shoe is restricted, and the life-span of friction plate is shorter.
Summary of the invention
The technical scheme is that
A kind of drum brake, including braked wheel, the first brake-shoe and the second brake-shoe, described second brake-shoe and outside machine Frame is hinged, and the side of described first brake-shoe is protruding, and the opposite side of described first brake-shoe is provided with the first arc groove, described High spot is provided with wheel cylinder, can offset with described projection during the elongation of the piston of described wheel cylinder, described second brake-shoe with The side that described first arc groove is relative is provided with second arc groove identical with described first arc groove size, and described Being provided with push rod between one arc groove and described second arc groove, described push rod one end offsets with described first arc groove, The described push rod other end offsets with described second arc groove, is additionally provided with between described first brake-shoe and described second brake-shoe Extension spring, described extension spring one end offsets with described first brake-shoe, and the described extension spring other end offsets with described second brake-shoe, institute State and between the inwall of the first brake-shoe and described braked wheel, be additionally provided with the first friction plate, described second brake-shoe and described braked wheel Inwall between be additionally provided with the second friction plate, it is characterised in that: the coefficient of friction of described first friction plate and the second friction plate from It is gradually increased to the one end near push rod near one end of extension spring.
Described first friction plate is less than described second friction plate and described braked wheel with the arc length of described braked wheel contact internal walls The arc length of contact internal walls.
Described first friction plate is attached by least one rivet with described first brake-shoe, the riveting of described first friction plate Offering the first groove for placing rivet head at nail installing hole, described second friction plate passes through with described second brake-shoe At least one rivet is attached, offer at the rivet installing hole of described second friction plate for place rivet head second Groove.
The invention have the benefit that and can make friction plate uniform wear, overcome only higher-pressure region in prior art and produce relatively Big frictional force, the shortcoming of low-pressure area auxiliary friction power, improves the service life of brake.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is described, it is clear that described is only a present invention part Embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are institute under not making creative work premise The every other embodiment obtained, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, position on the upper side is provided with projection in the middle part of the first brake-shoe 4, it is provided with braking on the right side of this projection Wheel cylinder 2, the piston on the left of wheel cylinder 2 can offset with this projection when extending, and wheel cylinder 2 right side opening is provided with screwed hole, Wheel cylinder 2 is attached by screw with external rack by this screwed hole, sets in the end, downside of the first brake-shoe 4 There is the first arc groove.
The first friction plate 3, the first friction plate 3 radial symmetric position it is additionally provided with between braked wheel 1 inwall and the first brake-shoe 4 Installed two the first grooves and the first rivet hole, the first groove and the first rivet hole to communicate, the first friction plate 3 right flank with The left surface of the first brake-shoe 4 offsets, and both are attached by the two of radial symmetric rivets simultaneously, for the riveting connected Nail head just can be placed in the first groove, and the first friction plate 3 left end face arc radius is equal to braked wheel 1 inwall circular arc Radius;
Be provided with the second brake-shoe 6 on the right side of braked wheel 1 boring structure, the second brake-shoe 6 is class moon dental structure, the The upside of two brake-shoes 6 is circular arc end face, and the circular arc end on the upside of the second brake-shoe 6 offers pin-and-hole, the second braking Hoof 6 carries out hinged by being positioned at the bearing pin 8 at pin-and-hole with external rack, and on the downside of the second brake-shoe 6, end is provided with second Arc groove, the second arc groove size is equal to the first arc groove;
Being provided with the second friction plate 5 between the second brake-shoe 6 and braked wheel 1 inwall, the radical length of the second friction plate 5 is big In the radical length of the first friction plate 3, the second friction plate 5 radial symmetric position is provided with two the second grooves and the second rivet hole, Second friction plate 5 is attached by the two of radial symmetric rivets with the second brake-shoe 6, and the second groove can just be put simultaneously Entering the head of rivet, the second friction plate 5 its right end face arc radius size is equal to braked wheel 1 inwall arc radius;
Being provided with push rod 7 between the first arc groove and the second arc groove, the left and right sides end face of push rod 7 is circular arc knot Structure, the arc structure of push rod 7 end face can just be put in the first arc groove and the second arc groove;
Extension spring 9, one end of extension spring 9 and first it is provided with between the upside of the upside of the first brake-shoe 4 and the second brake-shoe 6 Brake-shoe 4 connects, and the other end and second brake-shoe 6 of extension spring 9 connect.
Owing to friction plate is little near being stressed of extension spring 9 one end, big near being stressed of one end of push rod 7, and pressure In the trend incrementally increased, therefore, the coefficient of friction of the first friction plate and the second friction plate is set from the one end near extension spring 9 It is gradually increased to the one end near push rod 7, it is possible to make friction plate uniform wear, overcomes only higher-pressure region in prior art and produce Raw bigger frictional force, the shortcoming of low-pressure area auxiliary friction power, improves the service life of brake.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail Illustrate, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all Within protection scope of the present invention should being included in.

Claims (3)

1. a drum brake, including braked wheel, the first brake-shoe and the second brake-shoe, described second brake-shoe is with outside Frame is hinged, and the side of described first brake-shoe is protruding, and the opposite side of described first brake-shoe is provided with the first arc groove, institute Stating high spot and be provided with wheel cylinder, the piston of described wheel cylinder can offset with described projection when extending, described second brake-shoe The side relative with described first arc groove is provided with second arc groove identical with described first arc groove size, described Push rod, described push rod one end and described first arc groove phase it is provided with between first arc groove and described second arc groove Supporting, the described push rod other end offsets with described second arc groove, between described first brake-shoe and described second brake-shoe also Being provided with extension spring, described extension spring one end offsets with described first brake-shoe, and the described extension spring other end offsets with described second brake-shoe, The first friction plate, described second brake-shoe and described braking it is additionally provided with between described first brake-shoe and the inwall of described braked wheel It is additionally provided with the second friction plate between the inwall of wheel, it is characterised in that: described first friction plate and the coefficient of friction of the second friction plate It is gradually increased to the one end near push rod near one end of extension spring.
Drum brake the most according to claim 1, it is characterised in that: in described first friction plate and described braked wheel The arc length of wall contact is less than the arc length of described second friction plate with described braked wheel contact internal walls.
Drum brake the most according to claim 2, it is characterised in that: described first friction plate and described first braking Hoof is attached by least one rivet, offers for placing rivet head at the rivet installing hole of described first friction plate The first groove, described second friction plate is attached by least one rivet with described second brake-shoe, and described second rubs The second groove for placing rivet head is offered at the rivet installing hole of pad.
CN201610607317.0A 2016-07-28 2016-07-28 Drum brake Pending CN105972123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610607317.0A CN105972123A (en) 2016-07-28 2016-07-28 Drum brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610607317.0A CN105972123A (en) 2016-07-28 2016-07-28 Drum brake

Publications (1)

Publication Number Publication Date
CN105972123A true CN105972123A (en) 2016-09-28

Family

ID=56951164

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610607317.0A Pending CN105972123A (en) 2016-07-28 2016-07-28 Drum brake

Country Status (1)

Country Link
CN (1) CN105972123A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102840255A (en) * 2012-09-20 2012-12-26 湖南中联重科车桥有限公司 Brake shoe, arrester and engineering vehicle
CN204610624U (en) * 2015-02-13 2015-09-02 江西弘旺汽车制动器制造有限公司 A kind of self compensation drum brake
CN105402282A (en) * 2015-12-15 2016-03-16 重庆亘宇园林景观工程有限公司 Self-reinforcing drum brake with ventilating and cooling device
CN105465237A (en) * 2015-12-20 2016-04-06 重庆泽田汽车部件有限责任公司 Drum brake with automatic alarm function
CN205350141U (en) * 2015-12-05 2016-06-29 重庆元创汽车整线集成有限公司 From reinforcement formula drum brake

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102840255A (en) * 2012-09-20 2012-12-26 湖南中联重科车桥有限公司 Brake shoe, arrester and engineering vehicle
CN204610624U (en) * 2015-02-13 2015-09-02 江西弘旺汽车制动器制造有限公司 A kind of self compensation drum brake
CN205350141U (en) * 2015-12-05 2016-06-29 重庆元创汽车整线集成有限公司 From reinforcement formula drum brake
CN105402282A (en) * 2015-12-15 2016-03-16 重庆亘宇园林景观工程有限公司 Self-reinforcing drum brake with ventilating and cooling device
CN105465237A (en) * 2015-12-20 2016-04-06 重庆泽田汽车部件有限责任公司 Drum brake with automatic alarm function

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Application publication date: 20160928

WD01 Invention patent application deemed withdrawn after publication