CN201321054Y - Brake clearance adjusting device - Google Patents
Brake clearance adjusting device Download PDFInfo
- Publication number
- CN201321054Y CN201321054Y CNU2008202145823U CN200820214582U CN201321054Y CN 201321054 Y CN201321054 Y CN 201321054Y CN U2008202145823 U CNU2008202145823 U CN U2008202145823U CN 200820214582 U CN200820214582 U CN 200820214582U CN 201321054 Y CN201321054 Y CN 201321054Y
- Authority
- CN
- China
- Prior art keywords
- brake clearance
- set screw
- self
- nut
- adjustment apparatus
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a brake clearance adjusting device, belonging to mechanical braking technical field. The brake clearance adjusting device comprises a limiting sleeve fixedly connected with a machine body; a thrust nut engendering circumferential restriction is inserted in the inner hole of the limiting sleeve; the self-locking threaded end of an adjusting bolt is screwed in the threaded hole of the thrust nut, and the other end of the adjusting bolt extends into an inner hole of an adjuster and props against the bottom of the hole; the adjusting bolt is joined with the adjustor through a unidirectional clutch mechanism; non-self-locking screw threads in the opposite screwing direction with the self-locking screw threads are arranged between two ends of the adjusting bolt; an adjusting nut is screwed on the non-self-locking screw threads; an elastic piece is arranged between the other end of the adjusting bolt and the side of the adjusting nut, which is far away from the limiting sleeve; and circumferential restriction is formed between the adjustor and the machine body. The brake clearance adjusting device ingeniously realizes the automatic adjustment of the brake clearance and is simple and compact in structure. Therefore, the brake clearance adjusting device better satisfies the development requirements of railway locomotive and rolling stock.
Description
Technical field
The utility model relates to a kind of vehicle braked device, and especially a kind of brake clearance adjustment apparatus belongs to the mechanical braking technical field.
Background technology
Understand according to the applicant, in the rail vehicles foundation brake rigging,, brake lining (or brake shoe) automatic gap adjuster is installed mostly in order to compensate the wearing and tearing of brake lining in manufacturing errors and the operational process (or brake shoe).These automatic gap adjusters have makes lock and transfers device independently to be installed in the foundation brake system, also has with brake cylinder to be made of one the component units brake cylinder.But its effect all is in order to make the gap between brake lining and the brake disc (or brake shoe and wheel tread) keep constant.Existing above-mentioned lash adjusting device adopts two multi-thread nuts to recommend regulative mode mostly, its complex structure, and volume is big, and manufacturing cost is higher.
Retrieval finds, the Chinese utility model patent that application number is 85107151, name is called " gap adjuster of railway vehicles " discloses the automatic slack adjuster that uses in a kind of railway vehicle braking unit.This adjuster has an axially movable push rod, the lead screw shaft that can transmit braking force of not rotating, the adjustment nut that mode with not self-locking is meshed with lead screw shaft and rotates against bearing, a tubular spring that acts between the leading screw.Adjustment nut master clutch place and push rod mutually clutch a locking bushing that does not rotate is wherein arranged only under the effect of locking spring to transmit braking force, move axially a command range, and in control clutch place and adjustment nut clutch mutually.In addition, the Chinese utility model patent that application number is 200420035476.0, name is called " a kind of railway locomotive, the two-way brake slack adjuster of lorry " discloses a kind of railway locomotive, the two-way brake slack adjuster of lorry, the threaded components that it adopts shell to contain, the adjustment nut cylindrical has a circle teeth groove, and it utilizes a sliding bolt to insert or withdraw from described teeth groove as required to realize the flexible adjustment of adjuster.Though the clearance adjuster of above patent disclosure respectively has advantage, but the constructional feature of this two patent applications technical scheme all is that the screw axis of not self-locking does not rotate all the time in the control process, and all need the not rotation of self lock nut of two end tooth clutch for clutch control, so structure is comparatively complicated, institute takes up space big.Especially the former axial dimension of (application number is 85107151) is big, is not suitable for the occasion of axial dimension requirement compactness, and the making of bull screw mandrel wherein and two gear clutch is all very difficult.
The utility model content
The purpose of this utility model is: at the shortcoming of above-mentioned prior art existence, propose a kind ofly can realize the brake clearance automatically regulating, and the brake clearance adjustment apparatus that structure is more simple, compact, thereby satisfy the needs that rail vehicles develops better.
In order to reach above purpose, brake clearance adjustment apparatus of the present utility model comprises the stop collar (C64) of captiveing joint with body (C33), plug-in mounting forms the thrust nut (C32) of circumferential constraint in the endoporus of described stop collar, the self-locking thread end of spinning set screw (C34) in the tapped bore of described thrust nut (C32), the other end of described set screw (C34) stretches in the endoporus of regulator body (C38) and is resisted against at the bottom of the hole, be connected by one-way clutch mechanism between described set screw (C34) and the regulator body, be shaped on the non-self-locking thread (T1) opposite between the two ends of described set screw (C34) with the self-locking thread rotation direction, spinning setting nut (C37) on the described non-self-locking thread, described setting nut (C37) deviates between the other end of the one side of stop collar and described set screw (C34) elastic component (009) is housed, and forms circumferentially constraint between described regulator body (C38) and the body (C33).
After the installation, form brake clearance S between the outer end of thrust nut and the fixed stop, and form prepsetting gap A between stop collar and the setting nut.As brake clearance S greater than prepsetting gap A, regulator body is after the distance of mobile prepsetting gap A under the promotion of actuation mechanism braking force F, contact with thrust nut and to make it also to move the distance that equates, this moment since brake clearance S greater than prepsetting gap A, therefore regulator body will continue to move, and contact with fixed stop until thrust nut.In this process, elastic component is compressed, setting nut is pressed on the stop collar, can not move and to rotate, thereby force set screw to be rotated to the direction that one-way clutch mechanism allows, because self-locking thread is opposite with non-self-locking thread rotation direction, and thrust nut can not rotate, make set screw screw out thrust nut, the result dwindles brake clearance.During alleviation, regulator body resets, and setting nut and stop collar disengage, under the effect of elastic component, setting nut is returned to the initial position in regulator body, under the restriction of one-way clutch mechanism, set screw is not changeed, thus guaranteed brake clearance reduce be worth constant.Like this, through several times braking and alleviation, brake clearance S will reduce gradually, up to equating with prepsetting gap A.
This shows, the ingenious automatically regulating of realizing brake clearance of the utility model, compared with prior art, can in regulating control, rotate the adjustment that realizes brake clearance by set screw with the opposite self-locking thread of rotation direction and non-self-locking thread, and only adopting a clutch structure---setting nut contacts with stop collar, and need not two end tooth clutch structures, therefore structure is obviously simplified, the processing and manufacturing of part is also relatively easy, can satisfy the needs of rail vehicles development better.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of a preferred embodiment of the utility model.
The specific embodiment
Embodiment one
Present embodiment is the adjuster that is used for rolling stock foundation brake rigging brake clearance, and its concrete structure as shown in Figure 1.The body C33 that does not all illustrate among the figure can be that lock is transferred body, brake cylinder casing or caliper body etc.Stop collar C64 is captiveed joint the T-shaped thrust nut C32 in plug-in mounting cross section in the interior outer end of hole by the screw 169 of its flange border with body C33.The cylindrical of thrust nut C32 is shaped on draw-in groove, and by the fixing end of corrugated dust protecting cap C67 of clip 264, the other end of dust protecting cap C67 is fixed on the body C33.Dust protecting cap both can prevent dust, and can prevent that also thrust nut from rotating.The self-locking thread end of spinning set screw C34 in the tapped bore of thrust nut C32, the other end of set screw C34 stretches in the endoporus of regulator body C38, at the bottom of the surface bearing 77 by contact with it is resisted against the hole.The torsion spring C73 of the two-way rotation of restriction set screw C34 is housed between the endoporus of set screw C34 and regulator body C38, constitutes free-wheel clutch; In other words, the torsion spring C73 that this free-wheel clutch (Couple) is arranged in the set screw C34 of regulator body C38 endoporus by regulator body C38, an end and is installed in the two-way rotation of regulator body C38 endoporus restriction set screw C34 forms, makes that set screw C34 can only be towards a direction rotation.Be shaped on the non-self-locking thread T1 of the bull opposite with the self-locking thread rotation direction between the two ends of set screw C34, non-self-locking thread T1 goes up spinning setting nut C37.The outer end of setting nut C37 is spacing by the circlip for bore C66 that is stuck in regulator body C38 endoporus, and the inner surface bearing C74 that axially passes through is connected with packing ring C65, between the outer shroud 1 of this packing ring and set screw C34 dish spring 009 is housed.One end of the contiguous body of regulator body C38 forms flange end, this flange end has guide groove (or hole), form circumferentially constraint between guide finger C31 on the body and the body C33 by being fixed on, make regulator body C38 under the braking force effect relatively body C33 move axially, and can not rotate.Regulator body C38 links to each other with actuation mechanism away from an end of body.
After regulator body C38 installs, and form prepsetting gap A between the stop collar C64.The size of A can be regulated by the position of regulating between regulating control and the actuation mechanism, and actuation mechanism produces brake action makes regulator body C38 to left movement, and its stroke is greater than A.Set screw C34 forms whole by outer shroud 1, screw 2 by interference a.Because set screw C34 is bearing on the regulator body C38 by bearing C77, therefore can bear the thrust that transmits by C38.And set screw C34 radially connects with regulator body C38 mutually by torsion spring C73, constitutes free-wheel clutch, therefore makes set screw in regulator body C38 unidirectional rotation can only be arranged.
The non-self-locking thread T1 of bull is opposite with the rotation direction of the common self-locking thread T2 of single head, and the rotation direction of the torsion spring C73 that plays the free-wheel clutch effect in the free-wheel clutch (Couple) is opposite with the rotation direction of T1 simultaneously.Couple among Fig. 1 is meant the torsional spring single dicrection clutch of being made up of set screw (C34), regulator body (C38) and torsion spring (C73).When the rotation direction of set screw was identical with the torsion spring rotation direction, torsion spring passed to regulator body with rotating torque, because the rotation of regulator body is limited, so set screw can not be rotated; When opposite rotation direction when set screw was opposite with the torsion spring rotation direction, torsion spring unclamped, and rotating torque can not be passed to regulator body, and this moment, set screw was free to rotate.
The advantage that adopts above-mentioned torsional spring single dicrection clutch is to need not to move axially, and during clutch, idle travel is little, thereby can further dwindle the axial dimension of brake clearance adjustment apparatus, helps installing and using in the space of less axial dimension.And processing and manufacturing is also more convenient.
During work, has brake clearance S between fixed stop D and the thrust nut C32.If brake clearance S equals prepsetting gap A, then regulating control C is moved to the left A under the promotion of actuation mechanism braking force F on the right, drive thrust nut C32 and also be moved to the left A, because S=A, at this moment thrust nut C32 just contacts with fixed stop D, power F puts on the D by regulator body C38, surface bearing C77, set screw C34, thrust nut C32, does not need this moment regulating control C to regulate.If brake clearance S is greater than presetting gap A, when regulating control is moved to the left distance A under the effect of power F, setting nut C37 contacts with stop collar C64, the effect of the stressed F of regulating control C this moment continues to move to left, setting nut C37 with stopped by stop collar C64 can not to move to left, dish spring 009 by compression, setting nut C37 is pressed on the stop collar C64 by dish spring 009, can not move and to rotate, at this moment setting nut C37 will force set screw C34 to rotate to the direction that torsion spring C73 allows, because T2 is opposite with the T1 rotation direction, thrust nut C32 can not rotate under the effect of dust protecting cap C67, therefore thrust nut C32 will be screwed out set screw C34, be moved to the left, thereby dwindle brake clearance S; During alleviation, regulating control C resets to the right under the driving of actuation mechanism, at this moment setting nut C37 and stop collar C64 disengage, under the effect of dish spring 009, setting nut C37 rotates to the initial position in regulating control C, because of the prevention of torsion spring C73, this moment, set screw C34 did not change again, thus guaranteed S reduce be worth constant.Through repeatedly release of brake effect, S reduces gradually like this, up to equating with A.
The one-way clutch mechanism that is provided with between the set screw of present embodiment and the regulator body is except above-mentioned torsional spring clutch, also can adopt other mechanism that can limit the two-way rotation of set screw C34, for example ratchet and pawl arrangement, overrunning clutch mechanism, carve piece formula mechanism or the like.
Claims (9)
1. brake clearance adjustment apparatus, comprise the stop collar (C64) of captiveing joint with body (C33), it is characterized in that: plug-in mounting forms the thrust nut (C32) of circumferential constraint in the endoporus of described stop collar, the self-locking thread end of spinning set screw (C34) in the tapped bore of described thrust nut (C32), the other end of described set screw (C34) stretches in the endoporus of regulator body (C38) and is resisted against at the bottom of the hole, be connected by one-way clutch mechanism between described set screw (C34) and the regulator body (C38), be shaped on the non-self-locking thread (T1) opposite between the two ends of described set screw (C34) with self-locking thread (T2) rotation direction, spinning setting nut (C37) on the described non-self-locking thread, described setting nut (C37) deviates between the other end of the one side of stop collar (C32) and described set screw (C34) elastic component (009) is housed, and forms circumferentially constraint between described regulator body (C38) and the body (C33).
2. brake clearance adjustment apparatus according to claim 1 is characterized in that: described one-way clutch mechanism is torsional spring single dicrection clutch (Couple).
3. brake clearance adjustment apparatus according to claim 2, it is characterized in that: described torsional spring single dicrection clutch (Couple) is arranged in the set screw (C34) of regulator body (C38) endoporus by regulator body (C38), an end and is installed in the torsion spring (C73) that regulator body (C38) endoporus limits the two-way rotation of set screw (C34) to be formed, and the rotation direction of described torsion spring (C73) is opposite with the rotation direction of non-self-locking thread (T1).
4. according to claim 1 or 2 or 3 described brake clearance adjustment apparatus, it is characterized in that: the cylindrical of described thrust nut (C32) is connected with dust protecting cap (C67), and the other end of described dust protecting cap (C67) is fixed on the body (C33).
5. brake clearance adjustment apparatus according to claim 4, it is characterized in that: be shaped on draw-in groove on the outer circumference surface of described thrust nut (C32), by the fixing end of corrugated dust protecting cap (C67) of clip (264), the other end of described dust protecting cap (C67) is fixed on the body (C33).
6. brake clearance adjustment apparatus according to claim 5 is characterized in that: the other end of described set screw (C34) is made of whole screw (2) and outer shroud (1) interference fit.
7. brake clearance adjustment apparatus according to claim 6, it is characterized in that: the outer end of described setting nut (C37) is spacing by the circlip for bore (C66) that is stuck in regulator body (C38) endoporus, the inner surface bearing (C74) that axially passes through is connected with packing ring (C65), between the outer shroud (1) of described packing ring and set screw (C34) elastic component (009) is housed.
8. brake clearance adjustment apparatus according to claim 7 is characterized in that: described elastic component is dish spring (009).
9. brake clearance adjustment apparatus according to claim 8, it is characterized in that: an end of the contiguous body of described regulator body (C38) forms flange end, described flange end has guide groove or hole, forms circumferentially constraint between guide finger (C31) on the body and the body (C33) by being fixed on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202145823U CN201321054Y (en) | 2008-12-16 | 2008-12-16 | Brake clearance adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202145823U CN201321054Y (en) | 2008-12-16 | 2008-12-16 | Brake clearance adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201321054Y true CN201321054Y (en) | 2009-10-07 |
Family
ID=41158442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202145823U Expired - Lifetime CN201321054Y (en) | 2008-12-16 | 2008-12-16 | Brake clearance adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201321054Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434245B (en) * | 2008-12-16 | 2011-09-07 | 南车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjustment apparatus |
| CN104260748A (en) * | 2014-10-20 | 2015-01-07 | 青岛思锐科技有限公司 | Track locomotive braking clamp unit brake block gap adjuster |
| CN104455119A (en) * | 2014-12-17 | 2015-03-25 | 南车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjuster |
| CN110860580A (en) * | 2019-11-05 | 2020-03-06 | 中冶陕压重工设备有限公司 | Device for adjusting gap under pressure |
-
2008
- 2008-12-16 CN CNU2008202145823U patent/CN201321054Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434245B (en) * | 2008-12-16 | 2011-09-07 | 南车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjustment apparatus |
| CN104260748A (en) * | 2014-10-20 | 2015-01-07 | 青岛思锐科技有限公司 | Track locomotive braking clamp unit brake block gap adjuster |
| CN104260748B (en) * | 2014-10-20 | 2017-06-13 | 青岛思锐科技有限公司 | Rail locomotive vehicle brake clamp unit brake lining slack adjuster |
| CN104455119A (en) * | 2014-12-17 | 2015-03-25 | 南车戚墅堰机车车辆工艺研究所有限公司 | Brake clearance adjuster |
| CN110860580A (en) * | 2019-11-05 | 2020-03-06 | 中冶陕压重工设备有限公司 | Device for adjusting gap under pressure |
| CN110860580B (en) * | 2019-11-05 | 2021-06-01 | 中冶陕压重工设备有限公司 | Device for adjusting press gap |
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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 |
Granted publication date: 20091007 Effective date of abandoning: 20081216 |