CN1031249C - Transmission mechanism for cargo-transport airplane - Google Patents
Transmission mechanism for cargo-transport airplane Download PDFInfo
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- CN1031249C CN1031249C CN 94100657 CN94100657A CN1031249C CN 1031249 C CN1031249 C CN 1031249C CN 94100657 CN94100657 CN 94100657 CN 94100657 A CN94100657 A CN 94100657A CN 1031249 C CN1031249 C CN 1031249C
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- friction braking
- friction
- hydraulic
- braking mechanism
- output shaft
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- 230000007246 mechanism Effects 0.000 title claims abstract description 59
- 230000005540 biological transmission Effects 0.000 title claims abstract description 20
- 230000009471 action Effects 0.000 claims abstract description 28
- 238000011068 loading method Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 5
- 230000032258 transport Effects 0.000 description 36
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000003245 coal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
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- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The present invention relates to a transmission device for conveyors, which comprises at least one level of planet speed-reducing mechanism, a first friction clutch mechanism arranged between a driving member of the planet speed-reducing mechanism and a casing of the transmission device, and a second friction clutch mechanism arranged between an input shaft and the casing of the transmission device. The transmission device overcomes the disadvantage that conveyors gradually increase speed because of gravity action under the conditions of loading and downward sloping running by a set of clutches and a control drive assembly for controlling the operation of the clutches. When powered off under a working condition, the transmission device can realize soft braking to a conveyor, so that a conveyor system is protected. Meanwhile, the transmission device can realize the functions of soft start, etc.
Description
The present invention relates to a kind of transport plane that is used for, the especially driving device of belt transporter, comprising one-level planetary gear speed reducing mechanism at least be arranged at the first friction braking mechanism between the Transmission and gear mechanism housing in the planetary gear speed reducing mechanism.
The downward transportation of transport plane (especially belt transporter), promptly transport be directed downwards and horizontal surface between the traffic condition of certain included angle is arranged, have many problems.Because in this case, the gravity that is in the material that the quilt on the transport plane transports will produce one and be parallel to the component that transporting direction points to, and this power can drive transport plane and quicken operation.If do not controlled, this acceleration operation usually can cause accident to take place, can wash away downwards with an acceleration/accel as in the case the material that is transferred, this on the one hand might be owing to quick, a large amount of the plunking down of material damages the transport plane back miscellaneous equipment of (or following); The more important thing is, more change the fast trend that heals under the pulling of the material that is transferred, driving device is destroyed because of hypervelocity, and cause motor under the pulling of transport plane, to enter the generating mode of operation because transport plane is.And at transport plane during by sudden power, if the device that there is no need, by gravity, material also can make transport plane continue to move downward, and make driving device and motor enter above-mentioned state, object also can next be let out and descend in the situation that has no resistance in addition, smashes following equipment or injures the operator.
Equally, in the starting process of transport plane, if existing material on the transport plane, loaded starting under the situation of no any safety method then is well-known to the harm of motor, belt and driving device.
Under coal mine, usually have the situation that needs the coal of downward transportation under having adopted.And downward-sloping angle has very big difference because of the geologic condition in each colliery is different.When downward angle was very big, the problems referred to above were very serious beyond doubt.Under coal mine, need the situation of transport plane loaded starting of common occurrence especially very general.This shows that the problems referred to above are then particularly outstanding for employed transport plane in the colliery.
In sum as can be known, protection transport plane motor, belt and driving device should be considered from following two aspects, in starting state and the working process, say more properly that so-called working process refers in particular to the state that transport plane is in downward conveying objects that is:.
In the prior art, though instruction is arranged, working process rarely had argumentation to how handling the problem that starting state occurs more.Usually solving down, the method for fortune hypervelocity problem is at reducer output shaft or motor output shaft brake equipment to be set, these devices all need adopt independently, the hydraulic damping system of complexity, its shortcoming is to cause the structure of whole equipment complicated greatly, cost also increases thereupon, and the simultaneous faults rate increases also thereupon and is inevitable.Prevent that because the caused problem of sudden power all is provided with independently band-type brake at the motor output shaft place, this mode is referred to as " hard brake down " and be generally.The shortcoming of this brake mode is a serious wear, at the generation glancing impact belt and driving system is all had very big impact simultaneously.Generally speaking, the method that realizes soft start in the prior art is to adopt fluid coupling, and its weak point is that volume is big, and efficient is low.
German patent DE 3821319A1 discloses a kind of actuating device that drives that is used to transship; this device is mainly used in the scraping transporter under the coal mine; though this article relates to the problem among a few thing process; it is the problem of overload protection; but do not relate to transport plane; especially belt transporter is in existing problem under the mode of operation of downward conveying objects, and the document is only instructed to be equipped with the multilayer drg and slided and pressure monitoring device provides the driving device with high adaptive capacity in different gear ranges.
The object of the present invention is to provide a kind of transport plane that is used for; especially the driving device of belt transporter; this device is when can guaranteeing whole transport plane soft start and it is carried out overload protection; can also prevent that the hypervelocity phenomenon from appearring in transport plane under the mode of operation of band year downward-sloping operation; and transport plane is realized soft braking can under above-mentioned mode of operation, cut off the power supply the time, thereby protection conveyor system.
Above-mentioned purpose of the present invention is realized by following technical proposals:
A kind of driving device that is used for transport plane, comprise one-level planetary gear speed reducing mechanism at least and be arranged in the planetary gear speed reducing mechanism the first friction braking mechanism between a Transmission and the driving device casing, also comprise the second friction braking mechanism that is arranged between input shaft and the driving device casing.
The described first and second friction braking mechanisms comprise the first and second multilayer disc type friction brakes or liquid viscosity drg respectively.
The described second friction braking mechanism comprises that the drg loading that is used for to wherein makes its closed loading spring; Be used for the second controlling and driving assembly of exerting pressure this drg is discharged to described loading spring according to the output shaft mode of operation of planetary mechanism.
The described second controlling and driving assembly comprises the sensor that is used to gather the output shaft speed signal; Be used for comparator that described speed signal is compared with given value; Hydraulic gear and hydraulic action tube by comparator output signal control.
The described first friction braking mechanism comprises and is used for this stop mechanism being discharged or the first closed controlling and driving assembly according to planetary mechanism output shaft mode of operation.
The described first controlling and driving assembly comprises the torque sensor that is used to detect planetary mechanism output shaft output torque; Be used for comparator that described torque signals is compared with given value; Hydraulic gear and hydraulic actuator by comparator output signal control.
The diameter of the friction lining of the described second friction braking mechanism is less than the diameter of the first friction braking mechanism.
Described hydraulic gear comprises pressure source and hydraulic control component.
Described in this article Transmission is meant that fixing part of relative casing in the epicyclic transmission mechanism.This part can be sun wheel, pinion carrier or external toothing.Described in a preferred embodiment of the invention Transmission is an external toothing.
According to device of the present invention, second set between input shaft and this driving device casing friction brake under normal circumstances is in open mode, and promptly it does not apply any resistance to input shaft.And in case when obtained signal surpassed predetermined value from speed sensor, hydraulic gear just made the hydraulic action tube action of this drg of control, and then reduce and to the pressure of spring this drg is suitably engaged, with this input shaft is applied resistance.
When having obliquely downwards, the transport plane loads works like this, and in transport plane pick up speed when operation gradually, appear in by gravity, can be according to the variation modulated pressure mechanism work of output shaft speed, end reaction is for to make second brake engages by spring, thereby input shaft loaded the speed of the output shaft that slows down.That is to say with this and avoided the hypervelocity downslide phenomenon of transport plane when band carries downward-sloping operation.
Because the present invention makes the second friction brake closure with spring, thereby if the contingency of sudden power, then this drg can be thoroughly closed by predetermined speed (that is little by little) under the effect of spring force, and the input shaft motor braking is lived the most at last.This also means thoroughly brakes output shaft live, and that is to say, when this unexpected state occurs, according to device of the present invention transport plane is thoroughly braked.
This following fortune conveyor belt that will avoid fully occurring under the situation of sudden power carries the phenomenon of quickening operation or the impact that hard brake down brought.
Also adopted first friction brake in the present invention, this drg is used to realize soft start and overload protection.
In when starting, the hydraulic action tube to control first friction brake loads gradually, thus make in first epicyclic transmission mechanism Transmission during starts relatively the casing of apparatus of the present invention slip is arranged.This slip will make the speed of output shaft and output torque all less than the nominal operation value, and both differences can gently reduce along with the incremental action of first friction brake and hydraulic action tube.Thereby the load of motor is increased gradually by control to the hydraulic action tube, realize soft start thus.
And under the situation of overload, the output by the slide relative that is produced between two groups of friction linings of first friction brake with motor is controlled within the rated range, has so just realized so-called overload protection.
From the above, because the present invention has adopted two groups of friction brakes that are provided with respectively, and is equipped with controlling and driving assembly separately, thereby above-mentioned purpose of the present invention is achieved.Drg related among the present invention also comprises the liquid viscosity drg except that the multilayer disc type friction brake that comprises dry type and wet type.
Below in conjunction with corresponding accompanying drawing, with the form of specific embodiment the present invention is described in detail, wherein:
Fig. 1 is the scheme drawing of expression transport plane driving device of the present invention, and the driving device among the figure adopts the two-stage epicyclic transmission mechanism;
Referring to Fig. 1, schematically shown a kind of embodiment of driving device that adopts the two-stage epicyclic transmission mechanism with the form of function symbol among this figure according to the present invention, this embodiment remains and is used for transport plane, in particular for belt transporter.
One end of input shaft 1 links to each other with the motor (not shown), and its other end then stretches in the housing 13 of driving device of the present invention.Stretching into an end of the input shaft 1 in the housing 13 and the sun wheel 14 in first epicyclic transmission mechanism 9 is fixedly linked.Input shaft 1 in housing 13 by bearings.The second friction braking mechanism 4 is arranged between housing 13 and the sun wheel 14, and two groups of friction linings 15,16 wherein respectively are arranged at respectively on input shaft 1 and the housing 13.Friction lining 15,16 constitutes second friction brake.In the second friction braking mechanism 4, be provided with the spring 2 that is used for to above-mentioned two groups of friction linings, 15,16 loadings between friction lining 15,16 of this drg and the housing 13.Spring 2 along the direction that parallels with input shaft 1 be evenly arranged in the concentric circumference of friction lining 15,16 on.Obviously, spring 2 can adopt several groups of belleville spring or the cylinder-shaped compression springs that are provided with in the radial extension of friction lining 15,16; Also can be to resemble the belleville spring that friction lining 15,16 relative input shafts 1 are provided with one heart.By attaching parts 17 end of spring 2 near friction lining 15,16 1 sides linked to each other with an end of hydraulic action tube 6, the other end of hydraulic action tube 6 then is connected with housing 13.Like this, by the fore and aft motion of hydraulic action tube 6, can 2 pairs of friction linings of controlling spring, 15,16 axial thrusts that applied.That is to say, by hydraulic action tube 6 be the may command second friction braking mechanism 4 from the action of closing.
In the present embodiment, when spring 2 is in its compression,metal-to-metal position, be 6 grades in hydraulic action tube when contracting to its end position, because spring 2 is in state basic or that be separated with friction lining 15,16 fully, thereby the second friction braking mechanism 4 is in its disengaged position at this moment.In this state, the second friction braking mechanism 4 does not apply any resistance to input shaft 1, and all torques that so just make the motor (not shown) deliver to input shaft 1 all arrive output shaft 7 by first and second epicyclic transmission mechanisms 8,9.
Can also see that from Fig. 1 the diameter of the first friction braking mechanism 3 is greater than the second friction braking mechanism 4, and be set in the radial outside of the second friction braking mechanism 4 by this.This structure helps the size of distilled edition contrive equipment in the axial direction.
In the first friction braking mechanism 3, be provided with alternately and be individually fixed in the external toothing 18 of first epicyclic transmission mechanism 9 and the two groups of friction linings 19,20 on the housing 13.These two groups of friction linings 19,20 constitute first friction brake.Be provided with on the end of a side of friction lining 19,20 and be used to hydraulic action tube 5 that the first friction braking mechanism 3 is loaded, the other end of this application cylinder 5 then is fixedly linked with housing 13.Like this, adopt structure as shown in Figure 1, when the transport plane that adopts apparatus of the present invention begins to start, it is progressively loaded to friction lining 19,20, external toothing 18 was rotated relative to housing 13 between the starting period by modulated pressure application cylinder 5.Like this, just can make motor the unloading phase progressively be loaded, promptly existing how much load on transport plane no matter all can realize the effect that drive motor progressively loads by the control to hydraulic action tube 5 when starting.Here it is so-called soft start function.
In another kind of embodiment according to the present invention, be to adopt the load maintainer that in the second friction braking mechanism 4, has used to come the first friction braking mechanism 3 is loaded.Promptly come two groups of friction linings 19,20 are loaded with compressed spring.In like manner, in such an embodiment, hydraulic action tube 5 is used for the control loaded spring.This structure because of with the second friction braking mechanism in used identical, so expression in the drawings.
Certainly, after motor reached its standard duty, hydraulic action tube 5 pressed together two groups of friction linings 19,20 fully, do not relatively rotate between external toothing 18 and the housing 13 or slide thereby make, and at this moment be normal mode of operation.
When the transport plane that adopts apparatus of the present invention when band carries transportation downwards, the object that betransported just applies a component that points to along transporting direction to transport plane under the effect of gravity, this power will make transport plane quicken operation downwards.Under this state, when output speed during, will utilize the second controlling and driving assembly in the second friction braking mechanism 4 to control the action of second friction brake according to device of the present invention greater than predetermined specified output speed, realize transport plane is given controlled reset.At this moment, hydraulic action tube 6 stretches out gradually, and spring 2 is stretched gradually, and thereupon with friction lining 15,16 pressings gradually.On input shaft 1, apply a damping moment like this, thereby the output shaft of motor is given certain braking.When output speed during less than predetermined rotating speed, second controlling and driving assembly control hydraulic action tube 6 wherein withdraw gradually, makes spring 2 compressions, thereby reduces to be applied to the damping moment on the input shaft 1, makes the increase of output shaft rotating speed.
In this embodiment of the present invention, when sudden power occurring, make hydraulic action tube 6 by the predetermined speed full extension with an adjustable throttling (illustrating), thereby make friction lining 15,16 closed fully under the effect of spring 2, thereby progressively input shaft 1 is braked fully, realized so-called soft braking.So just avoided the variety of issue that might occur effectively, this shows that this also is one of significant advantage of the present invention.
Can see from Fig. 1 left side, near the end of output shaft 7, also be provided with speed sensor 11 and torque sensor 10.Speed sensor 11 is controlled the action of second friction brake by the tach signal of gathering output shaft 7; Torque sensor 10 is then controlled the action of first friction brake by the torque signals of gathering output shaft 7, take this to constitute respectively first, second controlling and driving assembly of apparatus of the present invention.To be further described above-mentioned control process below.
At first, collect the rotating speed of output shaft 7 by speed sensor 11, and with in this tach signal input comparator 21, above-mentioned tach signal is compared with a predefined desirable numerical value in comparator 21.When being worth, just send control signal and drive hydraulic gear 12 actions, thereby to hydraulic action tube 6 feed flows, release spring 2 being so that to friction lining 15,16 pressurizations gradually by comparator 21 greater than this; When being worth less than this, hydraulic efficiency pressure system is opened second drg fully.
10 torque signals of gathering on the output shaft 7 of torque sensor, and with in this signal input comparator 21, with itself and predefined, situation and the above-mentioned tach signal of desired numeric ratio after is basic identical, but just remove modulated pressure application cylinder 5 by hydraulic gear, its detailed process repeats no more.
Above-mentioned acquisition of signal, signal relatively produce control signal driving hydraulic gear 12 actions etc. and know to those skilled in the art, and promptly those of ordinary skill can be realized above-mentioned control process according to known technology.Therefore the above-mentioned content that belongs to known technology is not described in detail at this.
Certainly, be in the present embodiment with sun wheel 14 as the input and with pinion carrier as output.But this is a kind of concrete form of implementation, does not constitute a kind of qualification.Obviously, also is fully passable with other parts in the planet circular system as input component, just the first friction braking mechanism 3 need be arranged to be arranged between input component and the housing 13 between cooresponding non-input and output part and the housing 13 and with the second friction braking mechanism 4 to get final product.
Claims (6)
1, a kind of driving device that is used for transport plane, comprise one-level planetary gear speed reducing mechanism at least and be arranged in the planetary gear speed reducing mechanism the first friction braking mechanism between a Transmission and the driving device casing, it is characterized in that, also comprise the second friction braking mechanism that is arranged between input shaft and the driving device casing, the described second friction braking mechanism comprises that the drg loading that is used for to wherein makes its closed loading spring; Be used for the second controlling and driving assembly of exerting pressure this drg is discharged to described loading spring according to the output shaft mode of operation of planetary mechanism, the described second controlling and driving assembly comprises the sensor that is used to gather the output shaft speed signal; Be used for comparator that described speed signal is compared with given value; Hydraulic gear and hydraulic action tube by comparator output signal control.
2, device as claimed in claim 1 is characterized in that, the described first and second friction braking mechanisms comprise the first and second multilayer disc type friction brakes or liquid viscosity drg respectively.
3, device as claimed in claim 2 is characterized in that, the described first friction braking mechanism comprises and is used for this stop mechanism being discharged or the first closed controlling and driving assembly according to planetary mechanism output shaft mode of operation.
4, device as claimed in claim 3 is characterized in that, the described first controlling and driving assembly comprises the torque sensor that is used to detect planetary mechanism output shaft output torque; Be used for comparator that described torque signals is compared with given value; Hydraulic gear and hydraulic actuator by comparator output signal control.
5, device as claimed in claim 1 or 2 is characterized in that, the diameter of the friction lining of the described second friction braking mechanism is less than the diameter of the first friction braking mechanism.
6, as claim 1 or 4 described devices, it is characterized in that described hydraulic gear comprises pressure source and hydraulic control component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94100657 CN1031249C (en) | 1994-01-21 | 1994-01-21 | Transmission mechanism for cargo-transport airplane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94100657 CN1031249C (en) | 1994-01-21 | 1994-01-21 | Transmission mechanism for cargo-transport airplane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1095038A CN1095038A (en) | 1994-11-16 |
| CN1031249C true CN1031249C (en) | 1996-03-13 |
Family
ID=5029765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94100657 Expired - Fee Related CN1031249C (en) | 1994-01-21 | 1994-01-21 | Transmission mechanism for cargo-transport airplane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031249C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220348412A1 (en) * | 2021-04-30 | 2022-11-03 | Cnh Industrial America Llc | Electronically controlled viscous coupler for combine harvester |
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1994
- 1994-01-21 CN CN 94100657 patent/CN1031249C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1095038A (en) | 1994-11-16 |
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