CN203080570U - Steering brake and bulldozer - Google Patents
Steering brake and bulldozer Download PDFInfo
- Publication number
- CN203080570U CN203080570U CN 201220628685 CN201220628685U CN203080570U CN 203080570 U CN203080570 U CN 203080570U CN 201220628685 CN201220628685 CN 201220628685 CN 201220628685 U CN201220628685 U CN 201220628685U CN 203080570 U CN203080570 U CN 203080570U
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- clutch
- brake
- hub
- output hub
- braking
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Abstract
The utility model discloses a steering brake and a bulldozer and belongs to the technical field of bulldozer components. The steering brake comprises an input shaft, an input hub which is connected with the input shaft, a hydraulic clutch, an output hub and a hydraulic brake. A clutch segment and a brake segment are arranged on the output hub. The input hub is connected with the clutch segment of the output hub through the hydraulic clutch to generate transmission. The hydraulic brake is connected with the brake segment of the output hub. The hydraulic clutch is in a brake state if the hydraulic clutch is not in a work state. An output connection structure for being connected with a subordinate transmission structure is arranged on the output hub. The steering brake has the advantages of being simple in structure, convenient to install, dismantle and maintain, simple in an oil circuit system, reliable in work, free of normal pressure building, little in power consumption of a hydraulic oil pump, free of an additional working oil cooling system, capable of being started under low temperature conditions, strong in wear-resistance, good in radiating performance, capable of preventing friction pieces from being burnt due to excessive heat, capable of prolonging service life and capable of ensuring that torque reserve coefficients of the clutch are not basically changed.
Description
Technical field
The utility model relates to a kind of bulldozer assembly, relates in particular to a kind of steering brake and bulldozer.
Background technology
Turn to brake to adopt the clutch braking in a turn in the known bulldozer track drive bridge more, existing steering cluth and brake separate, operating mechanism also is independently, so dismounting and maintenance are cumbersome, and a plurality of operating mechanisms bring certain difficulty also for driver's operation.In addition, what the steering brake that matches with steering cluth adopted is the friction band brake, braking effect is bad, be easy to generate impact, do not reach desirable effect during zig zag, steering cluth adopts cylindrical spring to compress the Wet-type multi-disc copper-base friction plate that hydraulic pressure separates, because the pressure-deformation curve of cylindrical spring is a straight line, behind the clutch friction pad wear, its thrust will reduce, cause the clutch torque reserve factor to descend, because separation process is a process with length of spring compressed in fact, so the spring stress of separation process increases, this can cause the steering force of clutch to increase, in order to improve performance of clutch, the number of turns of holddown spring is generally more, and this can make clutch axial dimension lengthening.Simultaneously, copper-base friction plate hardness height, elasticity and compressibilty are poor, cause the coefficient of kinetic friction relatively low and quiet/coefficient of kinetic friction coupling is unreasonable relatively.
Summary of the invention
The problems referred to above at existing bulldozer steering brake exists now provide a kind of steering brake and bulldozer.
Concrete technical scheme is as follows:
A kind of steering brake wherein, comprises power shaft 1, the input hub 2, hydraulic clutch, output hub 3 and the liquid braking device that are connected with described power shaft 1; Described output hub 3 is provided with clutch section 31 and braking section 32, described input hub 2 is connected with the clutch section 31 of described output hub 3 by described hydraulic clutch and forms transmission, described liquid braking device is connected with the braking section 32 of described output hub 3, and described liquid braking device is in on-position when not working; Described output hub 3 is provided with in order to connect the output syndeton of subordinate's drive mechanism.
Preferably, described power shaft 1 is connected with described input hub 2 by spline.
Preferably, described input hub 2 is sheathed in the clutch section 31 of described output hub 3, described hydraulic clutch is located on described input hub 2 outer peripheral faces, and between described input hub 2 and described output hub 3, described hydraulic clutch makes between described input hub 2 and the described output hub 3 when working and forms transmission.
Preferably, described liquid braking device is mainly formed by the brake end cap 42 of the housing 41 of the dish type of holding described output hub 3 braking sections 32, described housing 41 openings of sealing, the braking clutch-plate group 43, brake piston 44 and the elastomeric element 45 that are located on the annular of described output hub 3 outer peripheral faces;
Described braking clutch-plate group 43 is mainly by forming with the external tooth braking steel disc of described housing engagement and with the internal tooth brake strip space of described output hub 3 engagements, described brake piston 44 is located at the one side of described braking clutch-plate group 43 towards described housing 41 bottoms, described elastomeric element 45 is located between described brake piston 44 and described housing 41 bottom surfaces and is made described brake piston 44 to described braking clutch-plate group 43 direction activities, and described braking clutch-plate group 43 is leaned and is pressed on the described end cap 42;
Be provided with oil channel structure in the described housing 41, the one side of the described dorsad housing of described oil channel structure and described brake piston 44 41 bottom surfaces forms the braking oil pocket, makes described brake piston 44 to described housing 41 bottom surface direction activities and compress described elastomeric element 45 during described braking oil pocket oiling;
Described housing 41 bottom surfaces are provided with the hole, and the output syndeton of described output hub 3 is connected with the subordinate rotational structure by described hole.
Preferably, described hydraulic clutch is mainly formed by clutch end cap 51, the clutch-plate group 52 and the clutch piston 53 that are located on the annular of described input hub 2 outer peripheral faces;
Described clutch end cap 51 closes described input hub envelope 2 in described output hub 3 and establishes the hole with the center and pass for described power shaft 1;
Described clutch-plate group 52 is mainly by forming with the internal tooth clutch friction plate of described input hub 2 engagements and with the external tooth clutch steel disc space of described output hub 3 engagements;
Described clutch piston 53 is located at described clutch-plate group 52 one side of described end cap dorsad, form the clutch oil pocket between described clutch piston 53 and described output hub 3 bottom surfaces, during described clutch oil pocket oiling described clutch piston 53 promote described clutch-plate group 52 against and be pressed on the described clutch end cap 51.
Preferably, described internal tooth brake strip is that Wet-type paper friction material is made.
Preferably, described elastomeric element 45 is the dish spring.
Preferably, described internal tooth clutch friction plate is that Wet-type paper friction material is made.
Preferably, the output syndeton of described output hub 3 is a spline.
A kind of bulldozer wherein, comprises above-mentioned steering brake.
The beneficial effect of technique scheme is:
1, the incorporate layout of steering brake is simple in structure, makes dismounting extremely convenient, is convenient to maintenance.
2, steering cluth is by the oil pressure transfer torque, and extruding separates by fluid under centrifugal action, so oil piping system is simpler, and reliable operation.
3, brake separates by fluid by the disc spring pressing transfer torque, so oil piping system is simpler, does not set up normal pressure during work in the system, and the power that hydraulic oil pump consumes is few, and needn't add the working oil cooling system, and can guarantee the startup under cryogenic conditions.
4, owing to adopt the Wet-type paper friction plate, the abrasion resistance of steering cluth is strong, and thermal diffusivity is good, can prevent that friction plate is overheated and ablates, and has improved application life.Coefficient of kinetic friction value high and stable, quiet/coefficient of kinetic friction is approaching, the transfer torque ability is strong, frictional noise is little, cohesive process is soft steadily, anti-wear performance is good and planform is easy to design.
5, adopt the high strength disk spring in the brake, even at the end at friction disc wear, the torque reserve coefficient that still can guarantee clutch is constant substantially, when clutch carried out lock out operation, the distortion of dish spring became big, but pressure is more and more littler, handle also more and more lighter, in addition, the axial dimension of disk spring is also less, and thrust is equally distributed at circumferencial direction.
6, steering cluth is in normally open, even when steering hydraulic system breaks down, still can utilize tractor to wait and draw, and is shipped to the repair location place under repair.
Description of drawings
Fig. 1 is the cross-sectional view of the embodiment of a kind of steering brake of the utility model;
Fig. 2 is the perspective view of the embodiment of a kind of steering brake of the utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as qualification of the present utility model.
As depicted in figs. 1 and 2, the embodiment of a kind of steering brake of the utility model comprises power shaft 1, the input hub 2 that is connected with power shaft 1, hydraulic clutch, output hub 3 and liquid braking device; Output hub 3 is provided with clutch section 31 and braking section 32, input hub 2 is connected with the clutch section 31 of exporting hub 3 by hydraulic clutch and forms transmission, liquid braking device is connected with the braking section 32 of output hub 3, and liquid braking device is in on-position when not working; Output hub 3 is provided with in order to connect the output syndeton of subordinate's drive mechanism.
The operating principle of technique scheme is: power shaft 1 transmits power from the gearbox output of bulldozer to importing hub 2, by hydraulic clutch input hub 2 is combined with output hub 3, output hub 3 exports subordinate's drive mechanism such as whole drive mechanism to drive crawler driving whell by the output syndeton, when needing braking, hydraulic clutch makes the input hub separate with output hub 3, simultaneously, liquid braking device is braked output hub 3.This steering brake uses in pairs, each steering brake is controlled the braking in a turn of a side crawler belt, the hydraulic clutch of both sides makes input hub 2 combine with output hub 3 when needs are kept straight on, liquid braking device is in not on-position simultaneously, when turning, needs turn to the liquid braking device of a side to brake, the state that opposite side continue to keep is kept straight on turns to a side that hydraulic clutch is separated simultaneously when needs low speed is turned and liquid braking device is braked.Wherein, power shaft 1 can be connected with input hub 2 by spline.
On the technique scheme basis, further, input hub 2 is sheathed in the clutch section 31 of output hub 3, and hydraulic clutch is located on input hub 2 outer peripheral faces, and between input hub 2 and output hub 3, make during hydraulic clutch work between input hub 2 and the output hub 3 and form transmission.Wherein hydraulic clutch can be mainly formed by clutch end cap 51, the clutch-plate group 52 and the clutch piston 53 that are located on the annular of input hub 2 outer peripheral faces; Clutch end cap 51 will be imported hub envelope 2 and close in output hub 3 and establish hole confession power shaft 1 with the center and pass; Clutch-plate group 52 is mainly by forming with the internal tooth clutch friction plate of input hub 2 engagements and with the external tooth clutch steel disc space of exporting hub 3 engagements; Clutch piston 53 is located at clutch-plate group 52 one side of end cap dorsad, forms clutch oil pocket 54 between clutch piston 53 and output hub 3 bottom surfaces, during 54 oilings of clutch oil pocket clutch piston 53 promote clutch-plate groups 52 against and be pressed on the clutch end cap 51.
Under the normal condition, gapped between the external tooth clutch steel disc of clutch-plate group 52 and the internal tooth clutch friction plate, make input hub 2 and output hub 3 be in released state, when 54 oilings of clutch oil pocket, clutch piston 53 is pressed on the clutch end cap 51 clutch-plate group 52, this moment, external tooth clutch steel disc and internal tooth clutch friction plate were compacted, thereby input hub 2 is combined with output hub 3, and wherein the internal tooth clutch friction plate can adopt Wet-type paper friction material or copper-based material to make.
On the technique scheme basis, further, liquid braking device can be mainly formed by the brake end cap 42 of the housing 41 of the dish type of holding output hub 3 braking sections 32, closure casing 41 openings, the braking clutch-plate group 43, brake piston 44 and the elastomeric element 45 that are located on the annular of output hub 3 outer peripheral faces; Braking clutch-plate group 43 is mainly by forming with the external tooth braking steel disc of housing engagement and with the internal tooth brake strip of exporting hub 3 engagements, brake piston 44 is located at the one side of braking clutch-plate group 43 towards housing 41 bottoms, elastomeric element 45 is located between brake piston 44 and housing 41 bottom surfaces and is made brake piston 44 to the 43 direction activities of braking clutch-plate group, will brake clutch-plate group 43 and lean and be pressed on the end cap 42; Be provided with oil channel structure in the housing 41, oil channel structure and brake piston 44 one side of housing 41 bottom surfaces dorsad form braking oil pocket 46, make brake piston 44 to housing 41 bottom surface direction activity and elasticity of compression parts 45 during 46 oilings of braking oil pocket; Housing 41 bottom surfaces are provided with the hole, and the output syndeton of output hub 3 is connected with the subordinate rotational structure by the hole.Wherein brake end cap 42 can be fixed on the frame of bulldozer.Housing 41 can form oil channel structure and braking oil pocket 46 jointly by additional other assemblies, therefore repeats no more because this is the technological means of using always.
Under the normal condition, elastomeric element 45 makes brake piston 44 compress braking clutch-plate group 43 on brake end cap 42, output hub 3 is combined with housing 41, because housing 41 is connected and fixed with brake end cap 42, therefore output hub 3 is produced braking effect, when 46 oilings of braking oil pocket, brake piston 44 promotes elastomeric element 45, braking clutch-plate group 43 is unclamped, export hub 3 this moment and throw off, the brake force of output hub 3 is eliminated with housing 41.The internal tooth brake strip can adopt Wet-type paper friction material or copper base to make.Elastomeric element 45 can adopt the dish spring simultaneously, can adopt single dish spring also can adopt many dish springs to pile up use.
The lubricated of technique scheme can adopt the mode of concentrating splash lubrication of uniting.Can on output hub 3, offer a circle radial direction through hole, make the lubricated energy between output hub 3 clutch sections 31 and the braking section 32 form more effective compensation liquid stream.Also can disc be set, under rotation status, produce lubricating fluid and splash, further strengthen lubricant effect at output hub 3 outer peripheral faces.And the bearing of output hub 3 with the housing junction can be placed in the effective splash lubrication scope, avoid opening up again lubricant passage way.
On the technique scheme basis, further, the output syndeton of output hub 3 can adopt spline 33.
Between each rotatable parts bearing can be set in the technique scheme, owing to therefore this technological means that is those skilled in the art habitually practise repeats no more.
Also comprise a kind of bulldozer among the embodiment of the present utility model, wherein, comprise above-mentioned steering brake.
The above only is the utility model preferred embodiment; be not so limit embodiment of the present utility model and protection domain; to those skilled in the art; should recognize that being equal to that all utilization the utility model manuals and diagramatic content done replace and the resulting scheme of conspicuous variation, all should be included in the protection domain of the present utility model.
Claims (10)
1. a steering brake is characterized in that, comprises power shaft (1), the input hub (2) that is connected with described power shaft (1), hydraulic clutch, output hub (3) and liquid braking device; Described output hub (3) is provided with clutch section and braking section, described input hub (2) is connected with the clutch section of described output hub (3) by described hydraulic clutch and forms transmission, described liquid braking device is connected with the braking section of described output hub (3), and described liquid braking device is in on-position when not working; Described output hub (3) is provided with in order to connect the output syndeton of subordinate's drive mechanism.
2. steering brake according to claim 1 is characterized in that described power shaft (1) is connected with described input hub (2) by spline.
3. steering brake according to claim 1, it is characterized in that, described input hub (2) is sheathed in the clutch section of described output hub (3), described hydraulic clutch is located on described input hub (2) outer peripheral face, and be positioned between described input hub (2) and the described output hub (3), described hydraulic clutch makes between described input hub (2) and the described output hub (3) when working and forms transmission.
4. steering brake according to claim 1, it is characterized in that described liquid braking device is mainly formed by housing (41), the brake end cap (42) that seals described housing (41) opening, the braking clutch-plate group (43) that is located on the annular of described output hub (3) outer peripheral face, brake piston (44) and the elastomeric element (45) of the dish type of holding described output hub (3) braking section;
Described braking clutch-plate group (43) is mainly by forming with the external tooth braking steel disc of described housing engagement and with the internal tooth brake strip space of described output hub (3) engagement, described brake piston (44) is located at the one side of described braking clutch-plate group (43) towards described housing (41) bottom, described elastomeric element (45) is located between described brake piston (44) and described housing (41) bottom surface and is made described brake piston (44) to described braking clutch-plate group (43) direction activity, and described braking clutch-plate group (43) is leaned and is pressed on the described end cap (42);
Described housing is provided with oil channel structure in (41), the one side of described oil channel structure and the described dorsad housing of described brake piston (44) (41) bottom surface forms the braking oil pocket, makes described brake piston (44) to described housing (41) bottom surface direction activity and compress described elastomeric element (45) during described braking oil pocket oiling;
Described housing (41) bottom surface is provided with the hole, and the output syndeton of described output hub (3) is connected with the subordinate rotational structure by described hole.
5. as steering brake as described in the claim 3, it is characterized in that described hydraulic clutch is mainly formed by clutch end cap (51), the clutch-plate group (52) and the clutch piston (53) that are located on the annular of described input hub (2) outer peripheral face;
Described clutch end cap (51) seals (2) with described input hub and closes in described output hub (3) and establish the hole with the center and pass for described power shaft (1);
Described clutch-plate group (52) is mainly by forming with the internal tooth clutch friction plate of described input hub (2) engagement and with the external tooth clutch steel disc space of described output hub (3) engagement;
Described clutch piston (53) is located at described clutch-plate group (52) one side of described end cap dorsad, form the clutch oil pocket between described clutch piston (53) and described output hub (3) bottom surface, during described clutch oil pocket oiling described clutch piston (53) promote described clutch-plate groups (52) against and be pressed on the described clutch end cap (51).
6. as steering brake as described in the claim 4, it is characterized in that described internal tooth brake strip is that Wet-type paper friction material is made.
7. as steering brake as described in the claim 4, it is characterized in that described elastomeric element (45) is the dish spring.
8. as steering brake as described in the claim 5, it is characterized in that described internal tooth clutch friction plate is that Wet-type paper friction material is made.
9. as steering brake as described in arbitrary among the claim 1-8, it is characterized in that the output syndeton of described output hub (3) is a spline.
10. a bulldozer is characterized in that, comprises as steering brake as described in arbitrary among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220628685 CN203080570U (en) | 2012-11-23 | 2012-11-23 | Steering brake and bulldozer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220628685 CN203080570U (en) | 2012-11-23 | 2012-11-23 | Steering brake and bulldozer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203080570U true CN203080570U (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220628685 Expired - Fee Related CN203080570U (en) | 2012-11-23 | 2012-11-23 | Steering brake and bulldozer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203080570U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139853A (en) * | 2018-08-30 | 2019-01-04 | 山推工程机械股份有限公司 | A kind of end drive mechanism, bull-dozer and Servo Control method |
| CN109849417A (en) * | 2019-03-06 | 2019-06-07 | 浙江易锻精密机械有限公司 | A kind of circulating cooling brake |
-
2012
- 2012-11-23 CN CN 201220628685 patent/CN203080570U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139853A (en) * | 2018-08-30 | 2019-01-04 | 山推工程机械股份有限公司 | A kind of end drive mechanism, bull-dozer and Servo Control method |
| CN109849417A (en) * | 2019-03-06 | 2019-06-07 | 浙江易锻精密机械有限公司 | A kind of circulating cooling brake |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20151123 |