CN204264170U - A kind of brake clamp unit - Google Patents

A kind of brake clamp unit Download PDF

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Publication number
CN204264170U
CN204264170U CN201420733934.1U CN201420733934U CN204264170U CN 204264170 U CN204264170 U CN 204264170U CN 201420733934 U CN201420733934 U CN 201420733934U CN 204264170 U CN204264170 U CN 204264170U
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China
Prior art keywords
brake
lever
caliper
piston
clamp unit
Prior art date
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CN201420733934.1U
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Chinese (zh)
Inventor
王正杰
韩晓辉
赵春光
张思远
李业明
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.)
Locomotive and Car Research Institute of CARS
Beijing Zongheng Electromechanical Technology Development Co Ltd
Original Assignee
Locomotive and Car Research Institute of CARS
Beijing Zongheng Electromechanical Technology Development Co Ltd
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Priority to CN201420733934.1U priority Critical patent/CN204264170U/en
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Publication of CN204264170U publication Critical patent/CN204264170U/en
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Abstract

The utility model relates to a kind of brake clamp unit, it is characterized in that, comprises erecting frame; Caliper body, is connected with erecting frame by slip shaft, thus can relative to erecting frame sliding axially along slip shaft; Lever, is pivotablely arranged between erecting frame and caliper body; Brake disc, is arranged between lever and caliper body, at lever, the position relative with brake disc respectively of caliper body is provided with brake lining; And hydraulic actuating cylinder, be arranged between one end contrary with brake lining of lever and caliper body, this hydraulic actuating cylinder has reset attachment.

Description

A kind of brake clamp unit
Technical field
The utility model relates to rail vehicle braking field, the spring energy-storage type hydraulic braking nipper units particularly in a kind of guideway vehicle.
Background technology
Fig. 1 shows the principle of work of the spring hydraulic brake clamp unit of prior art.As shown in Figure 1, its principle of work is as follows.The erecting frame 1 of nipper units is fixed on the bogie truck (not shown) of vehicle, erecting frame 1 one side connects bogie truck, one side is connected with caliper body 3 by two slip shafts stretched out 2 (slip shaft is only shown in figure), makes caliper body 3 can in the cofree slippage of slip shaft 2.During braking, hydraulic efficiency pressure system by the hydraulic fluid port on hydraulic actuating cylinder 4 by the pressure dump in hydraulic actuating cylinder 4, the piston of hydraulic actuating cylinder inside is protruding under the thrust of spring, and then promotes lever 5 around anchor shaft rotation, enables lever end promote brake lining 6 and contacts with brake disc 7.After the brake lining 6 of lever side contacts with brake disc 7, when piston is protruding again, whole caliper body 3 can be slided along slip shaft, and the brake lining of opposite side is also fitted with brake disc 7, thus produces braking effect.During alleviation, hydraulic efficiency pressure system is by hydraulic fluid port to hydraulic actuating cylinder 4 injection pressure oil, and pressure oil promotes piston compression spring, and piston is regained in cylinder body, and lever 5 is released, and brake lining 6 and brake disc 7 depart from, and brake and are alleviated.
Because the development of guideway vehicle is more and more harsher to space requirement under car, comparatively large, that dismounting the is inconvenient problem of this type brake clamp requisite space just constrains its field of application.
Utility model content
For the problems referred to above, the utility model provides a kind of brake clamp unit, comprises erecting frame; Caliper body, is connected with erecting frame by slip shaft, thus can relative to erecting frame sliding axially along slip shaft; Lever, is pivotablely arranged between erecting frame and caliper body; Brake disc, is arranged between lever and caliper body, at lever, the position relative with brake disc respectively of caliper body is provided with brake lining; And hydraulic actuating cylinder, be arranged between one end contrary with brake lining of lever and caliper body, this hydraulic actuating cylinder has reset attachment.
According to another aspect of the present utility model, the sealing member that described hydraulic actuating cylinder also comprises piston and is connected with piston, described piston lays respectively at the both sides of described sealing member.
According to another aspect of the present utility model, one end of described piston is stretched out adjacent to make described lever pivots with described lever by leading screw.
According to another aspect of the present utility model, described reset attachment is spring.
According to another aspect of the present utility model, described reset attachment is arranged on hydraulic actuating cylinder inside.
According to another aspect of the present utility model, also comprise wear compensation mechanism.
Accompanying drawing explanation
Below, will be described in more detail preferred implementation of the present utility model by reference to the accompanying drawings, wherein:
Fig. 1 is the schematic diagram of a kind of spring hydraulic brake clamp unit of prior art;
Fig. 2 is the schematic diagram of the spring energy-storage type hydraulic braking nipper units according to an embodiment of the present utility model;
Fig. 3 is the profile of the spring energy-storage type hydraulic braking nipper units according to an embodiment of the present utility model.
Fig. 4 is the inner schematic diagram of hydraulic actuating cylinder.
Fig. 5 is caliper slip compensation principle.
Detailed description of the invention
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Mention in detailed description below " on " D score " left side " " right side ", be described with reference to the direction in accompanying drawing, those of ordinary skill in the art can know and understand its implication.
Fig. 2 shows the schematic diagram of the spring energy-storage type hydraulic braking nipper units 100 according to the utility model exemplary embodiments.As shown in Figure 2, according to this embodiment, spring energy-storage type hydraulic braking nipper units 100 comprises erecting frame 1 and caliper body 3, erecting frame 1 is bolted on the bogie truck (not shown) of guideway vehicle, be connected with caliper body 3 by two slip shafts 2 (illustrate only a slip shaft in Fig. 2), caliper body 3 can be moved along slip shaft axial direction on slip shaft 2 simultaneously.Slip shaft 2 retrains all degree of freedom of caliper body 3 except the movement along slip shaft axial direction, and the moment produced when bearing braking.Nipper units 100 also comprises brake disc 7, and brake disc 7 is arranged on the side towards erecting frame 1 of caliper body 3.Caliper body 3 is provided with brake lining 6 ' in the position relative with brake disc 7.When caliper body 3 is axially moved on slip shaft 2, the brake lining 6 ' in caliper body 3 is fitted with brake disc or is separated, thus realizes braking or release.
Caliper body 3 there is corresponding hole coordinate with slip shaft 2, have lining and grease to provide lubrication in this hole, ensure slippage smooth and easy, aperture has dust ring to ensure caliper body 3 back and forth in slipping simultaneously, external dust foreign material etc. cannot invade in slip hole, affect shuffle effect.
Nipper units 100 also comprises lever 5, and lever 5 is hubbed between erecting frame 1 and brake disc 7.Illustrated in the embodiment of Fig. 2 that lever 5 is hubbed on the parts be fixedly connected with caliper body 3, but the utility model is not limited thereto.Lever 5 is non-essential to be connected with caliper body.A part for lever 5 is relative with brake disc 7, and lever 5 is provided with brake lining 6 in this position.Because lever 5 can around its pivotal point pivotable, therefore brake lining 6 can be fitted with brake disc 7 or be separated, thus realizes braking or release.
Nipper units 100 also comprises hydraulic pressure cylinder assembly, and hydraulic pressure cylinder assembly is arranged in caliper body 3 by bolt, and braking force is produced by hydraulic pressure cylinder assembly, acts on brake lining on after being changed the direction of power by lever, produces braking effect.Hydraulic pressure cylinder assembly is arranged between one end contrary with brake lining 6 of lever 5 and caliper body 3.Hydraulic pressure cylinder assembly has leading screw 8, and its one end abuts lever 5, and the other end connects the piston 9 of hydraulic pressure cylinder assembly.Reposition element 10 is provided with, such as spring 10 between this piston 9 and caliper body 3.Hydraulic actuating cylinder is provided with hydraulic fluid port, such as, on the sidewall of hydraulic actuating cylinder, thus can be annotated pressure oil or drain pressure oil by hydraulic fluid port, control the mode of operation of nipper units 100 by the pressure that changes in hydraulic actuating cylinder.
Principle of work according to nipper units 100 of the present utility model is described below.
1 without braking procedure during abrasion
Release of brake state
When vehicle normally runs, spring energy-storage type hydraulic braking nipper units 100 is in relieved state, hydraulic control device (not shown) is oily to hydraulic actuating cylinder injection pressure by the hydraulic fluid port on hydraulic actuating cylinder 4, in the embodiment of fig. 2, the piston 9 of hydraulic actuating cylinder inside and leading screw 8 is forced to move right thus Compress Spring 10.Because piston 8 moves right, no longer against lever 5, lever 5 is in free state, and brake lining 6 and brake disc 7 depart from, and form certain gap.Caliper body 3 can slidably reciprocate on slip shaft 2 along with the teeter of vehicle when relieved state, but does not apply positive pressure due to brake lining 6 and brake disc 7, therefore can not produce braking effect.
Service brake state
When vehicle needs braking, hydraulic control device is by valve discharge pressure oil, the hydraulic pressure value of hydraulic braking nipper units inside is reduced, the state of equilibrium of piston 9 and leading screw 8 is destroyed, restored by the spring compressed, piston 9 and leading screw 8 are released certain distance left, if this distance is greater than the gap between brake lining 6 and brake disc 7, then brake lining 6 is pressed on brake disc 7 by lever 5 by leading screw 8, produces braking force.The force value that piston nose hydraulic pressure produces adds that the power output of the braking force that lever feedback is returned and spring reaches state of equilibrium.
When needing to alleviate, hydraulic control device exports the hydraulic oil of certain pressure according to instruction, promotes piston compression spring.Within the scope of certain pressure, spring does not produce deformation, and just partial spring power is fallen by fluid pressure balance, and the power that lever is subject to reduces, and being reacted on brake lining and brake disc is exactly that braking force reduces.Spring can be made to produce after deformation when pressure reaches, move after piston, drive lever to regain, brake lining and brake disc are departed from, and braking mode is alleviated.
Parking brake state
When vehicle needs to carry out parked state, the hydraulic fluid port of caliper body is connected with the fuel tank of control setup by oil circuit by hydraulic control device, piston under the promotion of spring by hydraulic oil pressure oil sump tank.Now the front end of hydraulic actuating cylinder 4 is without hydraulic pressure, and spring 10 is pressed in the power on piston 9, pushes lever 5 by leading screw 8, acts directly on brake lining 6, makes brake lining 6 and brake disc 7 produce braking force.Due under this parking brake state, caliper body inside there is no hydraulic pressure, to alleviate this state, needing the hydraulic oil being filled with certain pressure to hydraulic actuating cylinder 4, therefore can ensure the situation that vehicle there will not be braking force to disappear under parking brake state.
After used a period of time, abrasion between brake lining and brake disc, will inevitably be there are in brake clamp unit.When abrasion state appears in brake lining and brake disc, if do not compensate, for clamp, the gap being equivalent to brake lining and brake disc increases, being reflected on braking liquid cylinder pressure is exactly that piston movement distance increases, and the distance of spring release increases, and the result caused is exactly that power output reduces.If this occurs, the safety of vehicle will be affected.
The compensation of abrasion is divided into two parts: the compensation of hydraulic actuating cylinder and the compensation of caliper.
The compensation of 2.1 hydraulic actuating cylinder inside
As shown in Figure 4, hydraulic actuating cylinder 4 inside has one group of gap adjustment assembly, is made up of front adjusting nut 13, leading screw 8, rear adjusting nut 15, stop nut 16 and other associate members.In the process of general release of brake, the distance after the gap of brake lining and brake disc is reflected in hydraulic actuating cylinder and is exactly between adjusting nut 15 and stop nut 16.When abrasion appear in brake lining and braking, when its gap is greater than the distance between rear adjusting nut 15 and stop nut 16, adjustment assembly in gap completes the compensation of abrasion loss in a pressure m and a pressurization alleviation process.Process is as follows: after there are abrasion, brake lining gap is greater than the distance between rear adjusting nut 15 and stop nut 16, and in pressure m process, spring 10 promotes thrust sleeve 18 and drives piston 9 to move, and meanwhile, thrust sleeve also drives front adjusting nut 13 to move.Front adjusting nut 13 inside is connected with leading screw 8, and outside and rear adjusting nut 15 is connected, and in certain movement distance, front adjusting nut 13 moves together with leading screw 8 with rear adjusting nut 15.After distance between adjusting nut after move distance exceedes 15 and stop nut 16, because stop nut 16 cannot rotate, the straight-line motion of rear adjusting nut 15 is caused to be restricted, but thrust sleeve 18 is adjusting nut 13 and leading screw 8 straight-line motion before drive still, because the connection mode of rear adjusting nut 15 and front adjusting nut 13 is five head threads, when axial tension acquires a certain degree, two nuts occur relatively to rotate, and axially discharge certain distance to ensure that front adjusting nut 13 still can move forward.In the process that two nuts rotate relatively, front adjusting nut 13, due to locked by thrust sleeve 18, does not rotate, and front adjusting nut 13 does not change with the relative position of leading screw 8.After having adjusted, it is large that the feature being reacted to hydraulic actuating cylinder outside is that leading screw 8 stretches out quantitative change, the compensated distance the stretched out part of brake lining and brake disc abrasion more.When pressurization is alleviated, hydraulic oil promotes piston 9 and retreats, and piston 9 promotes thrust sleeve 18 simultaneously and moves together with front adjusting nut 13, and front adjusting nut 13 drives leading screw 8 contraction that lever is regained by negative thread, and then alleviate braking, after being driven by outside thread, adjusting nut 15 retreats together.When rear adjusting nut 15 moves to closely connected with stop nut 16, piston 9 is not returned to original position, under the effect of hydraulic pressure, before piston 9 continues promotion, adjusting nut 13 and thrust sleeve 18 retreat, because rear adjusting nut 15 cannot move or rotate, and between front adjusting nut 13 and piston 9, have one group of spring ball pin, continuing under the pressure being subject to piston, thrust sleeve 18 continues to retreat, and front adjusting nut 13 is because rear end is by rear adjusting nut 15 dieback, there will be spring cylindrical pin to be compressed, now, front adjusting nut 13 departs from thrust sleeve 18, front adjusting nut 13 is removed in the constraint of circumferencial direction, under axial, front adjusting nut rotates, relatively, adjusting nut is close, till piston revert puts in place.In the process that front adjusting nut 13 rotates, leading screw 8 alleviates the circumference constraint of bolt 17 owing to being subject to rear end hand, can not rotate, because the result of adjusting nut 13 rotation is before this to for the position on leading screw 8 being retrogressing, upper once brake time, the additional overhang of leading screw compensate for the abrasion loss of brake lining and brake disc, therefore the move distance of assembly such as hydraulic actuating cylinder 4 internal piston 9 grade can return to adjustment again before state.
The compensation of 2.2 calipers
As shown in Figure 5, because the hydraulic actuating cylinder 4 of this spring energy-storage type hydraulic braking clamp is one-sided output, the adjustment direction of hydraulic actuating cylinder 4 own is also only limitted to one-sided adjustment, and the abrasion of brake lining 6,6 ' and brake disc 7 are bilaterals, therefore, the wear compensation of opposite side is just realized by the slip of caliper.Its process is as follows: if the brake lining 6 of lever 5 side and brake disc 7 have worn away, clamp only need by the capacity of self-regulation of hydraulic actuating cylinder 4 stretch out more a certain amount of leading screw 8 can complete to abrasion compensation.If the brake lining of lever offside 6 ' and brake disc 7 wear away, because the brake lining 6 that only lever 5 promotes can move, after the brake lining 6 of lever 5 side contacts with brake disc 7, leading screw 8 continues to stretch out, the effect being reflected to caliper 3 is exactly with lever 5 side brake lining 6 for fulcrum, with the axis of slip shaft 2 for axis, is pulled in the direction of whole caliper 3 toward erecting frame 1, the brake lining 6 ' of lever offside is fitted with brake disc 7, produces braking effect.During release of brake, lever 5 is regained, and the brake lining 6 ' of lever offside is not owing to having return mechanism, can form empty subsides state, but can not produce braking force with brake disc 7.By this process, caliper 3 is pulled certain distance to make up the abrasion of lever offside brake lining 6 ' and brake disc 7.
Because brake lining and brake disc in use all there will be abrasion in both sides, therefore in practice process, two kinds of compensation ways all can exist, by the interaction of two kinds of compensation ways, complete the compensation to brake lining and brake disc abrasion, ensure to export the braking force of requirement and normal brake lining gap.
When hydraulic control device fault, when cannot alleviate braking mode for hydraulic braking clamp input hydraulic pressure is oily, need by hand pump oily to clamp input pressure, force piston to retreat to make spring-compressed, reach the object alleviated and brake.Or alleviate bolt by directly twisting the east hand coaxial with piston rod, when not changing piston position, the push rod directly driving piston to connect rotates, and makes push rod retreat to make lever regain, reaches the object alleviating braking.
According to hydraulic braking nipper units of the present utility model, effectively save installing space, and be convenient to safeguard and maintenance.
Above with reference to illustrating exemplary embodiments of the present utility model.Above-described embodiment is only for illustration of the utility model, and be not to restriction of the present utility model, the those of ordinary skill of relevant technical field, when not departing from the utility model scope, can also make a variety of changes and modification, therefore, all equivalent technical schemes also should belong to category disclosed in the utility model.

Claims (9)

1. a brake clamp unit, is characterized in that, comprises
Erecting frame;
Caliper body, is connected with erecting frame by slip shaft, thus can relative to erecting frame sliding axially along slip shaft;
Lever, is pivotablely arranged between erecting frame and caliper body;
Brake disc, is arranged between lever and caliper body, is respectively arranged with brake lining at lever with the position relative with brake disc respectively of caliper body; With
Hydraulic actuating cylinder, be arranged between one end contrary with brake lining of lever and caliper body, this hydraulic actuating cylinder has reset attachment.
2. brake clamp unit according to claim 1, is characterized in that, the leading screw that described hydraulic actuating cylinder also comprises piston and is connected with piston, and described reset attachment is positioned at the side of described piston piece.
3. brake clamp unit according to claim 2, is characterized in that, one end of described piston is stretched out adjacent to make described lever pivots with described lever by leading screw.
4. brake clamp unit according to claim 1, is characterized in that, described reset attachment is spring.
5. brake clamp unit according to claim 1, is characterized in that, described reset attachment is arranged on hydraulic actuating cylinder inside.
6. brake clamp unit according to claim 2, is characterized in that, also comprises wear compensation mechanism.
7. brake clamp unit according to claim 6, is characterized in that, described wear compensation mechanism comprises the wear compensation mechanism being positioned at described hydraulic actuating cylinder inside.
8. brake clamp unit according to claim 7, is characterized in that, described wear compensation mechanism comprises front adjusting nut, rear adjusting nut, stop nut, and wherein said front adjusting nut inside is connected with described leading screw, and outside and rear adjusting nut is connected.
9. brake clamp unit according to claim 2, is characterized in that, the extended compensation abrasion of described leading screw.
CN201420733934.1U 2014-11-28 2014-11-28 A kind of brake clamp unit Active CN204264170U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420733934.1U CN204264170U (en) 2014-11-28 2014-11-28 A kind of brake clamp unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420733934.1U CN204264170U (en) 2014-11-28 2014-11-28 A kind of brake clamp unit

Publications (1)

Publication Number Publication Date
CN204264170U true CN204264170U (en) 2015-04-15

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Application Number Title Priority Date Filing Date
CN201420733934.1U Active CN204264170U (en) 2014-11-28 2014-11-28 A kind of brake clamp unit

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105156517A (en) * 2015-08-07 2015-12-16 青岛四方车辆研究所有限公司 Integrated driven type hydraulic braking clamp
CN105240426A (en) * 2015-10-20 2016-01-13 湘潭市恒欣实业有限公司 Adaptive brake for railway vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105156517A (en) * 2015-08-07 2015-12-16 青岛四方车辆研究所有限公司 Integrated driven type hydraulic braking clamp
CN105156517B (en) * 2015-08-07 2017-06-23 中车青岛四方车辆研究所有限公司 Integrated passive type hydraulic braking clamp
CN105240426A (en) * 2015-10-20 2016-01-13 湘潭市恒欣实业有限公司 Adaptive brake for railway vehicle
CN105240426B (en) * 2015-10-20 2018-04-17 湘潭市恒欣实业有限公司 Adaptive brake used for rail vehicle

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