CN205350141U - From reinforcement formula drum brake - Google Patents

From reinforcement formula drum brake Download PDF

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Publication number
CN205350141U
CN205350141U CN201520994348.7U CN201520994348U CN205350141U CN 205350141 U CN205350141 U CN 205350141U CN 201520994348 U CN201520994348 U CN 201520994348U CN 205350141 U CN205350141 U CN 205350141U
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CN
China
Prior art keywords
brake
shoe
braked wheel
friction plate
brake shoe
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Application number
CN201520994348.7U
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Chinese (zh)
Inventor
陈振丰
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CHONGQING YUANCHUANG AUTOMOBILE WHOLE LINE INTEGRATION Co Ltd
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CHONGQING YUANCHUANG AUTOMOBILE WHOLE LINE INTEGRATION Co Ltd
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Priority to CN201520994348.7U priority Critical patent/CN205350141U/en
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Publication of CN205350141U publication Critical patent/CN205350141U/en
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Abstract

The utility model discloses a from reinforcement formula drum brake, including the braked wheel, first brake shoe and second brake shoe, second brake shoe and outside hinged rack, be equipped with the arch on the first brake shoe, the high spot is equipped with the braking wheel cylinder, the piston of braking wheel cylinder when extension can offset with the arch, be equipped with first circular arc recess on the first brake shoe, be equipped with second circular arc recess on the second brake shoe, be equipped with the ejector pin between first circular arc recess and the second circular arc recess, still be equipped with the extension spring between first brake shoe and the second brake shoe. This scheme is compared with traditional drum brake, because the braking orientation of first brake shoe and second brake shoe is all the same with braked wheel direction of rotation, so the tangential counter -force between two brake shoes and the braked wheel all will make the packing force between brake shoe and the braked wheel increase, and then messenger's brake force between the two increases, and brake performance is better.

Description

Self-boosting type drum brake
Technical field
This utility model relates to drum brake, is specially a kind of self-boosting type drum brake.
Background technology
Brake is in order to produce to hinder the parts of the power of vehicle movement or movement tendency in brakes, automotive brake is except various retarding devices, it it is nearly all the friction brake of the friction generation braking moment utilizing retaining element with rotating element manipulation surface, at present, the friction brake that all kinds of automobiles are widely used is divided into drum brake and the big class of disk brake two according to the difference rotating element.
Drum brake utilizes brake-shoe extruding braked wheel to obtain brake force, in tradition drum brake, the side of two panels brake-shoe is all hinged with frame, the opposite side of brake-shoe coordinates with wheel cylinder, the brake of this structure can only make the brake-shoe direction of rotation when braking identical with the direction of braked wheel, and the direction of rotation of another brake-shoe is by contrary for the direction of rotation with braked wheel, when brake-shoe is identical with braked wheel direction of rotation, the thrust made between brake-shoe and braked wheel is increased by the tangential counter-force between brake-shoe and braked wheel, and then make brake force between the two increase, when brake-shoe is contrary with braked wheel direction of rotation, tangential counter-force between brake-shoe and braked wheel makes brake force between the two reduce, therefore the brake of this structure always has the braking effect of a brake-shoe more weak, and then cause that the braking ability of whole brake is poor.
Utility model content
This utility model is intended to provide the braking direction of a kind of two panels brake-shoe all identical with braked wheel direction of rotation, so that the better self-boosting type drum brake of the braking ability of brake.
Self-boosting type drum brake in this programme, including braked wheel, first brake-shoe and the second brake-shoe, second brake-shoe is hinged with external rack, first brake-shoe is provided with projection, high spot is provided with wheel cylinder, the piston of wheel cylinder can offset with projection when extending, the end, side of the first brake-shoe is provided with the first arc groove, second brake-shoe and the relative end, side of the first arc groove are provided with second arc groove identical with the first arc groove size, it is provided with push rod between first arc groove and the second arc groove, push rod one end and the first arc groove offset, the push rod other end and the second arc groove offset, it is additionally provided with extension spring between first brake-shoe and the second brake-shoe, extension spring one end and the first brake-shoe offset, the extension spring other end and the second brake-shoe offset.
The principle of this programme is: when not being braked, under the effect of extension spring, first brake-shoe and the second brake-shoe all separate with braked wheel, braked wheel runs well, when braked wheel is braked by needs, brake fluid is passed in wheel cylinder, outside the piston of wheel cylinder, shifting the projection with the first brake-shoe offset, under the effect of wheel cylinder piston, first brake-shoe point around push rod and the first arc groove place of offseting rotates to the direction near braked wheel inwall, until the first brake-shoe is pressed against on the inwall of braked wheel, simultaneously because push rod is to float, push rod will by offseting place to the second brake-shoe an equal amount of active force of applying with the second arc groove, second brake-shoe will rotate around pin joint and by the identical braking direction of the first brake-shoe under this active force, until the second brake-shoe and the laminating of braked wheel inwall, at the first brake-shoe and the second brake-shoe under the frictional force effect with braked wheel inwall, realize the braking action to braked wheel.
This programme is compared with tradition drum brake, owing to the braking direction of the first brake-shoe and the second brake-shoe is all identical with braked wheel direction of rotation, therefore the thrust made between brake-shoe and braked wheel is all increased by two tangential counter-forces between brake-shoe and braked wheel, and then making brake force between the two increase, braking ability is better.
Further, the first friction plate it is provided with between first brake-shoe and the inwall of braked wheel, inwall cooperation place of the second brake-shoe and braked wheel is provided with the second friction plate, friction plate is increased between brake-shoe and braked wheel inwall, can effectively increase the frictional force between brake-shoe and braked wheel inwall, improve retardation efficiency.
Further, the arc length of the first friction plate and braked wheel contact internal walls is less than the arc length of the second friction plate Yu braked wheel contact internal walls, the normal force that second friction plate bears when braking is bigger than the normal force that the first friction plate bears when braking, therefore to make the first friction plate and second friction plate pressure in unit are close, two friction plates in use even wearing, second friction plate is designed to longer than the arc length of the first friction plate Yu braked wheel contact internal walls with the arc length of braked wheel contact internal walls, namely area ratio first friction plate of the second friction plate and braked wheel contact internal walls wants big with the contact area of braked wheel inwall, thus it is close to realize two friction plates pressure in unit are.
Further, first friction plate and the first brake-shoe are attached by least one rivet, the rivet installing hole place of the first friction plate offers the first groove for placing rivet head, second friction plate and the second brake-shoe are attached by least one rivet, the rivet installing hole place of the second friction plate offers the second groove for placing rivet head, owing to two friction plates directly contact with braked wheel inwall when braking, therefore two friction plates will appear from abrasion in use for some time, in order to make two friction plates can conveniently dismantle after abrasion occurs, two are attached each through rivet between friction plate and brake-shoe, on two friction plates, offer groove simultaneously, the head of rivet is placed in groove, thus without having influence on coordinating of two friction plates and braked wheel inwall.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment.
Detailed description of the invention
Below by detailed description of the invention, this utility model is described in further detail:
Accompanying drawing labelling in Figure of description includes: braked wheel 1, wheel cylinder the 2, first friction plate the 3, first brake-shoe the 4, second friction plate the 5, second brake-shoe 6, push rod 7, bearing pin 8, extension spring 9.
Embodiment is substantially as shown in Figure 1: self-boosting type drum brake, including braked wheel 1, braked wheel 1 is boring structure, it is provided with the first brake-shoe 4 in the left side of braked wheel 1 boring structure, on the upside of first brake-shoe 4, end face is arc-shaped, in the middle part of the first brake-shoe 4, position on the upper side is provided with projection, it is provided with wheel cylinder 2 on the right side of this projection, piston on the left of wheel cylinder 2 can offset with this projection when extending, wheel cylinder 2 right side opening is provided with screwed hole, wheel cylinder 2 is attached by screw by this screwed hole and external rack, it is provided with the first arc groove in the end, downside of the first brake-shoe 4.
The first friction plate 3 it is additionally provided with between braked wheel 1 inwall and the first brake-shoe 4, first friction plate 3 radial symmetric position is provided with two the first grooves and the first rivet hole, first groove and the first rivet hole communicate, the left surface of the first friction plate 3 right flank and the first brake-shoe 4 offsets, both are attached by the two of radial symmetric rivets simultaneously, rivet head for connecting 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 arc radius.
It is provided with the second brake-shoe 6 on the right side of braked wheel 1 boring structure, second brake-shoe 6 is class moon dental structure, the upside of the second brake-shoe 6 is circular arc end face, circular arc end on the upside of the second brake-shoe 6 offers pin-and-hole, second brake-shoe 6 carries out hinged by being positioned at the bearing pin 8 at pin-and-hole place with external rack, on the downside of the second brake-shoe 6, end is provided with the second arc groove, and the second arc groove size is equal to the first arc groove.
The second friction plate 5 it is provided with between the second brake-shoe 6 and braked wheel 1 inwall, the radical length of the second friction plate 5 is more than the radical length of the first friction plate 3, second friction plate 5 radial symmetric position is provided with two the second grooves and the second rivet hole, second friction plate 5 and the second brake-shoe 6 are attached by the two of radial symmetric rivets, second groove can just put the head of rivet into simultaneously, and 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 arc structure, and the arc structure of push rod 7 end face can just be put in the first arc groove and the second arc groove.
Being provided with extension spring 9 between the upside of the upside of the first brake-shoe 4 and the second brake-shoe 6, one end of extension spring 9 is connected with the first brake-shoe 4, and the other end and second brake-shoe 6 of extension spring 9 connect.
Above-described is only embodiment of the present utility model, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the premise without departing from this utility model structure, it is also possible to make some deformation and improvement; these also should be considered as protection domain of the present utility model, and these are all without affecting effect and the practical applicability that this utility model is implemented.The protection domain that this application claims should be as the criterion with the content of its claim, and the detailed description of the invention in description etc. records the content that may be used for explaining claim.

Claims (4)

1. a self-boosting type drum brake, including braked wheel, first brake-shoe and the second brake-shoe, described second brake-shoe is hinged with external rack, it is characterized in that: the side of described first brake-shoe is protruding, the opposite side of described first brake-shoe is provided with the first arc groove, described high spot is provided with wheel cylinder, the piston of described wheel cylinder can offset with described projection when extending, the side that described second brake-shoe is relative with described first arc groove is provided with second arc groove identical with described first arc groove size, it is provided with push rod between described first arc groove and described second arc groove, described push rod one end and described first arc groove offset, the described push rod other end and described second arc groove offset, it is additionally provided with extension spring between described first brake-shoe and described second brake-shoe, described extension spring one end and described first brake-shoe offset, the described extension spring other end and described second brake-shoe offset.
2. self-boosting type drum brake according to claim 1, it is characterised in that: it is additionally provided with the first friction plate between described first brake-shoe and the inwall of described braked wheel, between described second brake-shoe and the inwall of described braked wheel, is additionally provided with the second friction plate.
3. self-boosting type drum brake according to claim 2, it is characterised in that: the arc length of described first friction plate and described braked wheel contact internal walls is less than the arc length of described second friction plate Yu described braked wheel contact internal walls.
4. self-boosting type drum brake according to claim 3, it is characterized in that: described first friction plate and described first brake-shoe are attached by least one rivet, the rivet installing hole place of described first friction plate offers the first groove for placing rivet head, described second friction plate and described second brake-shoe are attached by least one rivet, and the rivet installing hole place of described second friction plate offers the second groove for placing rivet head.
CN201520994348.7U 2015-12-05 2015-12-05 From reinforcement formula drum brake Active CN205350141U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520994348.7U CN205350141U (en) 2015-12-05 2015-12-05 From reinforcement formula drum brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520994348.7U CN205350141U (en) 2015-12-05 2015-12-05 From reinforcement formula drum brake

Publications (1)

Publication Number Publication Date
CN205350141U true CN205350141U (en) 2016-06-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520994348.7U Active CN205350141U (en) 2015-12-05 2015-12-05 From reinforcement formula drum brake

Country Status (1)

Country Link
CN (1) CN205350141U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105299096A (en) * 2015-12-05 2016-02-03 重庆元创汽车整线集成有限公司 Self-boosting drum type brake
CN105972123A (en) * 2016-07-28 2016-09-28 肇庆高新区凯盈顺汽车设计有限公司 Drum brake

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105299096A (en) * 2015-12-05 2016-02-03 重庆元创汽车整线集成有限公司 Self-boosting drum type brake
CN105972123A (en) * 2016-07-28 2016-09-28 肇庆高新区凯盈顺汽车设计有限公司 Drum brake

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