WO2012109699A1 - A gear and clutch assembly - Google Patents
A gear and clutch assembly Download PDFInfo
- Publication number
- WO2012109699A1 WO2012109699A1 PCT/AU2012/000129 AU2012000129W WO2012109699A1 WO 2012109699 A1 WO2012109699 A1 WO 2012109699A1 AU 2012000129 W AU2012000129 W AU 2012000129W WO 2012109699 A1 WO2012109699 A1 WO 2012109699A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plate
- clutch
- assembly
- gears
- shaft
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
- F16D7/02—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type
- F16D7/024—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces
- F16D7/025—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces with flat clutching surfaces, e.g. discs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
- F16D43/21—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members
- F16D43/213—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with axially applied torque-limiting friction surfaces
- F16D43/215—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with axially applied torque-limiting friction surfaces with flat friction surfaces, e.g. discs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H2001/2881—Toothed gearings for conveying rotary motion with gears having orbital motion comprising two axially spaced central gears, i.e. ring or sun gear, engaged by at least one common orbital gear wherein one of the central gears is forming the output
Definitions
- the present invention relates to gear and clutch assemblies, and more particularly but not exclusively to gear and clutch assemblies employable in apparatus that drill holes and insert bolts in rock layers surrounding a mine tunnel.
- Drill rigs are used to drill holes and insert bolts in rock layers surrounding a mine tunnel. These drill rigs have gear assemblies that increase the torque to be applied to the drill or bolt.
- a disadvantage of these previously known drive trains is that to provide the desired torque, the size of the rigs becomes excessive. Still further previous apparatus is not adapted to limit the torque applied to the drill or roof bolt.
- gear and clutch assembly including:
- a clutch having an input and an output, the clutch input being driven by the input shaft to drive the clutch output so that the clutch input and output angularly rotate in unison until a predetermined torque is applied to the clutch input, with said clutch input then being able to rotate at a greater angled velocity than the clutch output when said predetermined torque is exceeded;
- a ring gear a second set of planetary gears, the second set of gears being meshingly engaged with the ring gear, with the second set of planetary gears being driven by the first set of planetary gears;
- a carrier supporting the second set of gears so as to be rotatably driven thereby; an output shaft, the output shaft being driven by the carrier; and wherein the input shaft and the output shaft are operatively associated so that axial forces applied to the input shaft are transmitted to the output shaft.
- the input shaft and the output shaft have a common rotational axis.
- said first set of gears consists qf three gears.
- said second set of gears consists of three gears.
- said assembly includes a housing, with said ring gear fixed to said housing so as to be stationary.
- said clutch includes a first plate, the first plate being driven by the first input shaft;
- the second plate being drivingly connected to the first sun gear and having a plurality of detents, a plurality of rotatable elements, each element being located in a respective one of the detents, and a spring urging the elements into the detents that the first plate drives the second plate.
- the elements are located in apertures of the first plates, with the elements leaving the detents when said predetermined torque is exceeded so that the first plate can rotate at a greater angular velocity than the second plate.
- said clutch includes a collar, the collar being mounted on the clutch input shaft so as to be movable axially therealong, a pressure plate, the pressure plate being located so that the first plate is located between the second plate and pressure plate, with the pressure plate engaged with the elements, and wherein said spring located between the collar and pressure plate to urge the pressure plate against the elements to aid in retaining the elements in the detents.
- Figure 1 is a schematic isometric view of a gear and clutch assembly
- Figure 2 is a schematic side elevation of the assembly of Figure 1;
- Figure 3 is a schematic sectioned side elevation of the gear and clutch assembly of Figures 1 and 2.
- a gear and clutch assembly 10 to be used in a drill rig used for the purposes of forming bolt passages within which an anchor bolt may be inserted to engage a rock layer surrounding a mine tunnel.
- the assembly 10 may also be employed in the rig to tension the anchor bolt.
- the assembly 10 includes a housing 11 including a gear housing 12 and a clutch housing 13. Fixed to the housing 11 are mountings 14 via which the assembly may be fixed to the remainder of the drill rig.
- the assembly 10 includes an input shaft 15 that is driven by a motor, typically a hydraulic motor.
- the shaft 15 enters the housing 13 and has at its end extremity a flange 16.
- the flange 16 is engaged and supported by a bearing 17 that aids supporting the shaft 15 for rotation about the central rotational axis 18.
- the flange 16 has a splined circular passage 19 that drives a clutch input shaft 20.
- the shaft 20 is part of a clutch assembly 21 that includes a drive flange (plate) 22 and a driven flange (plate) 23, and a pressure plate 24.
- a spring or set of springs 25 is compressed against the plate 24 so as to urge the plate 24 toward to flange 23.
- the plate 24 is slidably mounted on the clutch input shaft 20 so as to be movable axially along the shaft 20.
- the flange 23 has a plurality of apertures, within each aperture there is located a spherical element 26. Each element 26 is also located in a detent in the flange 23. Until a predetermined torque is exceeded, the flanges 22 and 23 rotate in unison so as to rotate at the same angular velocity. However when a predetermined torque is exceeded, the spherical elements 26 will leave the detents in the flange 23 so that the flange 22 can rotate at a greater angular velocity than the flange 23.
- the abovementioned predetermined torque is determined by the compression forces applied to a spring 25.
- a compression collar 27 is threadably mounted on the clutch input shaft 20, so that upon any relative angular movement between the collar 27 and the shaft 20, the collar 27 will move axially along the shaft 20 to increase or decrease the compression applied to the spring 25.
- a bolt would engage the collar 27 to fix the collar 27 at the desired position on the shaft 20.
- the bolt and the collar 27 are accessible by means of apertures 29 in the housing 13.
- the shaft 28 is fixed to the flange 22 so as to drive the flange 22.
- the spring 25 urges the pressure plate 24 against the spherical elements 26 to retain the spherical elements in the detents of the flange 23. Upon a predetermined torque being exceeded, the elements 26 will move out of their respective detents as the plate 24 is slidably mounted on the shaft 20.
- a thrust bearing 29 transfers any axial load applied to the shaft 15 to the flange
- the shaft 30 has its lower end supported in the flange 23, and is supported at its upper end by a thrust bearing 31.
- the shaft 30 drives a sun gear 41 that is meshed with three planetary gears 32 arranged at equal angles about the axis 18, and therefore the shaft 30.
- Each of the gears 32 is integrally formed with a shaft 33 and a further gear 34. Accordingly there are three gears 44.
- Each of the shafts 33 is rotatably supported in a lower carriage 35 and an upper carriage 39 that are free to rotate about the axis 18 while permitting rotation of the gears 32 and 34.
- the gears 34 are meshingly engaged with a ring gear 36 that is fixed to the housing 12 so as to be stationary. Accordingly rotation of the gears 32 will cause rotation of the gears 34 about their respective rotational axis 37 (also the axes of the shaft 33 and gears 32), and therefore rotation of the carriages 35 and 39 about the axis 18.
- the upper carriage 35 is integrally formed with or provided with output shaft 38 that drives the associated drill bit.
- the thrust bearing 31 is mounted in the upper carriage 35 so that any axial thrust applied to the shaft 15 will ultimately be applied to the output shaft 38.
- the shaft 15 will drive the shaft 38 at an increased torque, but at a reduced angular velocity. This will occur until the torque applied to the shaft 15 exceeds a predetermined torque determined by the clutch 21.
- the predetermined torque is adjustable by operation of the collar 27, that is the compressive force applied to the spring 25.
- the flange 22 drives the flange 23, with the flange 23 then driving the shaft 30.
- the first set of planetary gears 32 are meshingly engaged with the sun gear 41 so as to be driven thereby.
- the first set of gears 32 drive the second set of planetary gears 34, with the gears 34 being meshingly engaged with the ring gear 36.
- Rotation of the gears 34 causes rotation of the carriages 35 and 39, with the upper carriage 39 being connected to the output shaft 38 so as to drive the shaft 38.
- Via the thrust bearings 29 and 31 axial forces applied to the shaft 15 are transferred to the shaft 38 so that the forces may be applied to a drill bit.
Abstract
A gear and clutch assembly (10) to be used in a mining drill rig, the assembly including a gear housing (12) and a clutch housing (13). Fixed to the housing (1 1) are mountings (14) via which assembly can be fixed to the remainder of the drill rig. The assembly (10) is adapted to limit the torque transmitted to a predetermined torque.
Description
A GEAR AND CLUTCH ASSEMBLY
Technical Field
The present invention relates to gear and clutch assemblies, and more particularly but not exclusively to gear and clutch assemblies employable in apparatus that drill holes and insert bolts in rock layers surrounding a mine tunnel.
Background of the Invention
Drill rigs are used to drill holes and insert bolts in rock layers surrounding a mine tunnel. These drill rigs have gear assemblies that increase the torque to be applied to the drill or bolt.
A disadvantage of these previously known drive trains is that to provide the desired torque, the size of the rigs becomes excessive. Still further previous apparatus is not adapted to limit the torque applied to the drill or roof bolt.
Object of the Invention
It is the object of the present invention to overcome or substantially ameliorate at least one of the above disadvantages.
Summary of the Invention
There is disclosed herein a gear and clutch assembly including:
an input shaft to be rotatably driven by a motor;
a clutch having an input and an output, the clutch input being driven by the input shaft to drive the clutch output so that the clutch input and output angularly rotate in unison until a predetermined torque is applied to the clutch input, with said clutch input then being able to rotate at a greater angled velocity than the clutch output when said predetermined torque is exceeded;
a sun gear;
a first set of planetary gears meshingly engaged with the first sun gear so as to be driven thereby;
a ring gear;
a second set of planetary gears, the second set of gears being meshingly engaged with the ring gear, with the second set of planetary gears being driven by the first set of planetary gears;
a carrier supporting the second set of gears so as to be rotatably driven thereby; an output shaft, the output shaft being driven by the carrier; and wherein the input shaft and the output shaft are operatively associated so that axial forces applied to the input shaft are transmitted to the output shaft.
Preferably, the input shaft and the output shaft have a common rotational axis.
Preferably, said first set of gears consists qf three gears.
Preferably, said second set of gears consists of three gears.
Preferably, said assembly includes a housing, with said ring gear fixed to said housing so as to be stationary.
Preferably, said clutch includes a first plate, the first plate being driven by the first input shaft;
a second plate, the second plate being drivingly connected to the first sun gear and having a plurality of detents, a plurality of rotatable elements, each element being located in a respective one of the detents, and a spring urging the elements into the detents that the first plate drives the second plate.
Preferably, the elements are located in apertures of the first plates, with the elements leaving the detents when said predetermined torque is exceeded so that the first plate can rotate at a greater angular velocity than the second plate.
Preferably, said clutch includes a collar, the collar being mounted on the clutch input shaft so as to be movable axially therealong, a pressure plate, the pressure plate being located so that the first plate is located between the second plate and pressure plate, with the pressure plate engaged with the elements, and wherein said spring located between the collar and pressure plate to urge the pressure plate against the elements to aid in retaining the elements in the detents.
Brief Description of the Drawings
A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings wherein:
Figure 1 is a schematic isometric view of a gear and clutch assembly;
Figure 2 is a schematic side elevation of the assembly of Figure 1; and
Figure 3 is a schematic sectioned side elevation of the gear and clutch assembly of Figures 1 and 2.
Detailed Description of the Preferred Embodiments In the accompany drawings there is schematically depicted a gear and clutch assembly 10 to be used in a drill rig used for the purposes of forming bolt passages within which an anchor bolt may be inserted to engage a rock layer surrounding a mine tunnel. The assembly 10 may also be employed in the rig to tension the anchor bolt.
The assembly 10 includes a housing 11 including a gear housing 12 and a clutch housing 13. Fixed to the housing 11 are mountings 14 via which the assembly may be fixed to the remainder of the drill rig.
The assembly 10 includes an input shaft 15 that is driven by a motor, typically a hydraulic motor. The shaft 15 enters the housing 13 and has at its end extremity a flange 16. The flange 16 is engaged and supported by a bearing 17 that aids supporting the shaft 15 for rotation about the central rotational axis 18.
The flange 16 has a splined circular passage 19 that drives a clutch input shaft 20. The shaft 20 is part of a clutch assembly 21 that includes a drive flange (plate) 22 and a driven flange (plate) 23, and a pressure plate 24.
A spring or set of springs 25 is compressed against the plate 24 so as to urge the plate 24 toward to flange 23. The plate 24 is slidably mounted on the clutch input shaft 20 so as to be movable axially along the shaft 20.
The flange 23 has a plurality of apertures, within each aperture there is located a spherical element 26. Each element 26 is also located in a detent in the flange 23. Until a predetermined torque is exceeded, the flanges 22 and 23 rotate in unison so as to rotate at the same angular velocity. However when a predetermined torque is exceeded, the spherical elements 26 will leave the detents in the flange 23 so that the flange 22 can rotate at a greater angular velocity than the flange 23.
The abovementioned predetermined torque is determined by the compression forces applied to a spring 25.
A compression collar 27 is threadably mounted on the clutch input shaft 20, so that upon any relative angular movement between the collar 27 and the shaft 20, the collar
27 will move axially along the shaft 20 to increase or decrease the compression applied to the spring 25. Typically a bolt would engage the collar 27 to fix the collar 27 at the desired position on the shaft 20. The bolt and the collar 27 are accessible by means of apertures 29 in the housing 13. The shaft 28 is fixed to the flange 22 so as to drive the flange 22.
The spring 25 urges the pressure plate 24 against the spherical elements 26 to retain the spherical elements in the detents of the flange 23. Upon a predetermined torque being exceeded, the elements 26 will move out of their respective detents as the plate 24 is slidably mounted on the shaft 20.
A thrust bearing 29 transfers any axial load applied to the shaft 15 to the flange
23.
The flange 23, via a splined connection, drives the shaft 30. The shaft 30 has its lower end supported in the flange 23, and is supported at its upper end by a thrust bearing 31.
The shaft 30 drives a sun gear 41 that is meshed with three planetary gears 32 arranged at equal angles about the axis 18, and therefore the shaft 30. Each of the gears 32 is integrally formed with a shaft 33 and a further gear 34. Accordingly there are three gears 44.
Each of the shafts 33 is rotatably supported in a lower carriage 35 and an upper carriage 39 that are free to rotate about the axis 18 while permitting rotation of the gears 32 and 34.
The gears 34 are meshingly engaged with a ring gear 36 that is fixed to the housing 12 so as to be stationary. Accordingly rotation of the gears 32 will cause rotation of the gears 34 about their respective rotational axis 37 (also the axes of the shaft 33 and gears 32), and therefore rotation of the carriages 35 and 39 about the axis 18.
The upper carriage 35 is integrally formed with or provided with output shaft 38 that drives the associated drill bit.
The thrust bearing 31 is mounted in the upper carriage 35 so that any axial thrust applied to the shaft 15 will ultimately be applied to the output shaft 38.
In operation of the above described preferred embodiment, the shaft 15 will drive the shaft 38 at an increased torque, but at a reduced angular velocity. This will occur until
the torque applied to the shaft 15 exceeds a predetermined torque determined by the clutch 21. In that respect it should be appreciated the predetermined torque is adjustable by operation of the collar 27, that is the compressive force applied to the spring 25.
The flange 22 drives the flange 23, with the flange 23 then driving the shaft 30. The first set of planetary gears 32 are meshingly engaged with the sun gear 41 so as to be driven thereby. The first set of gears 32 drive the second set of planetary gears 34, with the gears 34 being meshingly engaged with the ring gear 36. Rotation of the gears 34 causes rotation of the carriages 35 and 39, with the upper carriage 39 being connected to the output shaft 38 so as to drive the shaft 38. Via the thrust bearings 29 and 31, axial forces applied to the shaft 15 are transferred to the shaft 38 so that the forces may be applied to a drill bit.
Claims
1. A gear and clutch assembly including:
an input shaft to be rotatably driven by a motor;
a clutch having an input and an output, the clutch input being driven by the input shaft to drive the clutch output so that the clutch input and output angularly rotate in unison until a predetermined torque is applied to the clutch input, with said clutch input then being able to rotate at a greater angled velocity than the clutch output when said predetermined torque is exceeded;
a sun gear;
a first set of planetary gears meshingly engaged with the first sun gear so as to be driven thereby;
a ring gear;
a second set of planetary gears, the second set of gears being meshingly engaged with the ring gear, with the second set of planetary gears being driven by the first set of planetary gears;
a carrier supporting the second set of gears so as to be rotatably driven thereby; an output shaft, the output shaft being driven by the carrier; and wherein the input shaft and the output shaft are operatively associated so that axial forces applied to the input shaft are transmitted to the output shaft.
2. The assembly of claim 1, wherein the input shaft and the output shaft have a common rotational axis.
3. The assembly of claim 1 or 2, wherein said first set of gears consists of three gears.
4. The assembly of claim 1, 2 or 3, wherein said second set of gears consists of three gears.
5. The assembly of any one of claims 1 to 4, wherein said assembly includes a housing, with said ring gear fixed to said housing so as to be stationary.
6. The assembly of any one of claims 1 to 5, wherein said clutch includes a first plate, the first plate being driven by the first input shaft;
a second plate, the second plate being drivingly connected to the first sun gear and having a plurality of detents, a plurality of rotatable elements, each element being located in a respective one of the detents, and a spring urging the elements into the detents that the first plate drives the second plate.
7. The assembly of claim 6, wherein the elements are located in apertures of the first plates, with the elements leaving the detents when said predetermined torque is exceeded so that the first plate can rotate at a greater angular velocity than the second plate.
8. The assembly of any one of claims 1 to 7, wherein the clutch includes a collar, the collar being mounted on the clutch input shaft so as to be movable axially therealong, a pressure plate, the pressure plate being located so that the first plate is located between the second plate and pressure plate, with the pressure plate engaged with the elements, and wherein said spring located between the collar and pressure plate to urge the pressure plate against the elements to aid in retaining the elements in the detents.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2011900517 | 2011-02-16 | ||
| AU2011900517A AU2011900517A0 (en) | 2011-02-16 | A gear and clutch assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012109699A1 true WO2012109699A1 (en) | 2012-08-23 |
Family
ID=46671865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU2012/000129 WO2012109699A1 (en) | 2011-02-16 | 2012-02-10 | A gear and clutch assembly |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2012109699A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442880A (en) * | 2018-01-31 | 2018-08-24 | 连建腾 | A kind of drilling rig for oil exploration |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2069073A (en) * | 1980-02-11 | 1981-08-19 | Hilti Ag | Overload clutch for transmitting limited torque |
| JP2002013598A (en) * | 2000-06-30 | 2002-01-18 | Okamura Corp | Reduction gear in excavator and the like |
-
2012
- 2012-02-10 WO PCT/AU2012/000129 patent/WO2012109699A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2069073A (en) * | 1980-02-11 | 1981-08-19 | Hilti Ag | Overload clutch for transmitting limited torque |
| JP2002013598A (en) * | 2000-06-30 | 2002-01-18 | Okamura Corp | Reduction gear in excavator and the like |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442880A (en) * | 2018-01-31 | 2018-08-24 | 连建腾 | A kind of drilling rig for oil exploration |
| CN108442880B (en) * | 2018-01-31 | 2019-09-13 | 温州跨界环保科技有限公司 | A kind of drilling rig for oil exploration |
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