GB2185550A - Power take-off mechanism - Google Patents

Power take-off mechanism Download PDF

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Publication number
GB2185550A
GB2185550A GB08630866A GB8630866A GB2185550A GB 2185550 A GB2185550 A GB 2185550A GB 08630866 A GB08630866 A GB 08630866A GB 8630866 A GB8630866 A GB 8630866A GB 2185550 A GB2185550 A GB 2185550A
Authority
GB
United Kingdom
Prior art keywords
shaft
gear
tachometer
idle
power take
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.)
Granted
Application number
GB08630866A
Other versions
GB2185550B (en
GB8630866D0 (en
Inventor
Kap Soo Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kia Corp
Original Assignee
Kia Motors Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kia Motors Corp filed Critical Kia Motors Corp
Publication of GB8630866D0 publication Critical patent/GB8630866D0/en
Publication of GB2185550A publication Critical patent/GB2185550A/en
Application granted granted Critical
Publication of GB2185550B publication Critical patent/GB2185550B/en
Expired legal-status Critical Current

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
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
    • F16H3/22—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially
    • F16H3/30—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/28—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/38—Inputs being a function of speed of gearing elements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Structure Of Transmissions (AREA)
  • Gear Transmission (AREA)
  • Transmission Devices (AREA)

Abstract

An idle gear (5), which is constantly in mesh with a gear (10) on a power take-off shaft (2), is slidable along an idle shaft (4) by a hand lever into and out of mesh with a gear (3) on a sub-shaft (1) of a vehicle transmission. The speed of the power take-off shaft (2) can be monitored by a tachometer kit (11) connected via a cable (12) to a tachometer on a dashboard of the vehicle. <IMAGE>

Description

SPECIFICATION Powertake-off mechanism The present invention relates to a power take-off mechanism.
In agricultural vehicles or breakdown trucks, torque take from the transmission may be used for various work, such as water pumping, spraying, threshing or dragging a damaged or stuck car.
A conventional powertake-off mechanism has a torque-transmitting idle gear constantly in mesh with a gear mounted on a sub-shaft of a transmission, or a fork shaft and a shiftforkwhich is connected to a hand lever for bring the idle gear into and out of mesh with the gear mounted on the sub-shaftto transmit or cut offthetorque from the sub-shafttothe power take-off shaft.
In the former case, when it is not necessary to take-offthetorque,the idle gear is continuously rotated, so the power from the engine is wasted unnecessarily. In the latter case, since many members are required to cut off the transfer of the torque from the transmission, the cost is increased.
According to the invention, a power take-off mechanism for the transmission of a vehicle comprises a sub-shaft having a driving gearfixed thereon; a powertake-offshaft having a power take-offgearfixedthereon; an idle shaft positioned between the sub-shaft and the power take-off shaft; an idle gearsldably mounted on the idle shaft,the idle gear being constantly in mesh with the power take-offgearand selectively slidable into orout of mesh with the driving gear; and a hand lever for shifting the idle gear along the idle shaft.
The idle gear may have a hub including a recess for receiving a shift rod which is connected to the hand lever.
The invention also includes a vehicle having a transmission fitted with a power take-off mechanism according to the invention and preferably further comprising a tachometer kit for measuring the rotational frequency of the powertake-offshaft; a tachometer in the dashboard for indicating the measured rotational frequency; and a cable connecting the tachometer kit with the tachometer and transferring the rotational frequency to the tachometer. The tachometer kit may be connected to an end ofthe power-take-off shaft by a gear means.
With this arrangement when the transmission of torque iscut-off,the idle gear is idled out of mesh with the gear on the sub-shaft. This new mechanism can save the power from the engine ofthevehicle.
Whenthepowertake-offmechanism has a tachometer kit installed on an end ofthe power take-off shaft, and connected to the tachometer with acableforindicatingtherotational speed ofthe powertake-off shaft, the operator of the vehicle can control the rotation of the power take-off shaft in accordance with the indication of the tachometer provided in the dashboard of the vehicle.
The tachometer in the dashboard can indicate the rotational speed by suitable means such as digital or analogue equipment. If the measured rotational speed is not suitable for the desired work, the speed can be exactly controlled so as to be suitable for the work by changing the speed ratio ofthe transmission. The change of speed ratio is carried out e.g. by conventional gear charging ofthe arrangementofgears mounted on the main shaft and the sub-shaft of transmission.
When cutting off the transmission of power from the transmission, after work has been completed, the hand lever must be operated so that, e.g. a shift rod connected withthe hand lever movesthe idle gear along the idle shaft to bring the idle gear out of mesh with the drive gear.
In the accompanying drawings: Figure lisa part cross-sectional view of a power take-off mechanism in accordance with the present invention with a idle gear dismeshed from a drive gear, excluding a tachometer device; Figure2 is a part cross-sectional view taken perpendiculartothesection of Figure 1; and, Figure 3 is a cross-sectional view similar to Figure 1 but including a tachometer kit.
The illustrated power take-off mechanism includes a sub-shaft 1 of a transmission and a power take-off shaft 2.
The sub-shaft 1 ofthe transmission is provided in a conventional transmission gear box and is suitable to take offthe powerfrom it. A drive gear3 is fixed on the sub-shaft 1. The sub-shaft 1 and the power take-offshaft2 are parallel with some distance therebetween. Between the sub-shaft 1 and the powertake-offshaft 2 is arranged an idle shaft 4 on which an idle gear 5 is slidably mounted by spine means. On a hub 6 ofthe idle gear3 informed a circumferential recess in which a shift rod 8 is fitted for moving the idle gear 5 along the idle shaft4 bythe operation of a hand lever 9 which is connected with the shift rod 8. Apowertake-offgear 10 is fixed on the power take-off shaft 2 and is constantly in mesh with the idle gear 5 on the idle shaft 4.Atachometer kit 11 is installed on an end ofthe powertake-off shaft 2 by means of a gear mechanism and is connected to a tachometer (not shown) in the dashboard by a cable 12 which transfersthe rotary speed of the powertake-offshaft 2 to the tachometer.
Underthecondition shown in Figure 1,which illustrates the idle gear5 on the idle shaft4 dismeshed from the drive gear3 on the sub-shaft 1 of the transmission, the idle gear 5 is moved in the direction ofthearrowAalong the idle shaft bythe operation of the hand lever 9 and brought into mesh with the drive gear 3 on the sub-shaft 1. Then the power of the sub-shaft 1 is transmitted through the idle gear 5 to turn the powertake-off gear 1 0which is constantly in mesh with the idle gear.
The powertransmitted to the powertake-offshaft 2 rotates a power transfer means such as pulley or gearwhich is mounted on the end of an extension 13 of the powertake-offshaft 2 as desired.
The tachometer kit 11, installed on the end opposite to the extension 13 ofthe powertake-off shaft 2, measures the rotational frequency of the power take-off shaft 2 and transfers the measured rotational frequency of the shaft 2 to the tachometer (notshown) in the dashboard through the cable 12 so that the current rotational frequency can be indicated bythetachometer. If the measured rotational frequency is not suitable for the desired work, the rotational frequency can be exactly controlled until it is as desired by changing the arrangement of gears mounted on the main and the sub-shaft in the transmission.When the idle gear 5 is shifted in the direction ofthe arrow B by operating the hand lever 9, the idle gear 5 is dismeshed from the drive gear 3 on the sub-shaft 1 ofthe transmission to cut off the transfer of power from the transmission to the powertake-off shaft 2.
On the end of the extension 13 of the power take-off shaft 2 another power transferring member instead ofthe pulley or gear, can be fitted as necessaryforthe desired work. Each gear mounted on each shaft is a helical gear so that the power transfercan beeffectively and silencely achieved.
As described above the power take-off mechanism can be simply operated by the operation of the hand lever and the number of parts can be small.
Furthermore the rotational frequency ofthe power take-off shaft can be recognized by the tachometer in the dashboard and can thus be controlled forthe desired work.

Claims (6)

1. A powertake-off mechanism forthe transmission of a vehicle, the mechanism comprising a sub-shaft having a driving gearfixed thereon; a powertake-off shaft having a power take-off gear fixed thereon; an idle shaft positioned between the sub-shaft and the power take-off shaft; an idle gear slidably mounted on the idle shaft, the idle gear being constantly in mesh with the power take-off gear and selectively slidable into or out of mesh with the driving gear; and a hand leverfor shifting the idle gear along the idle shaft.
2. A mechanism according to claim 1, wherein the idle gear has a hub including a recess for receiving a shiftrod which is connected to the hand-lever.
3. Avehicle having a transmission fitted with a power take-off mechanism according to claim 1 or claim 2.
4. Avehicle according to claim 3,further comprising a tachometer kit for measuring the rotation frequency ofthe powertake-off shaft; a tachometer in the dashboard for indicating the measured rotational frequency; and a cable connecting the tachometer kit with the tachometer and transferring the rotational frequency to the tachometer.
5. Avehicle according to claim 4, wherein the tachometer kit is connected to an end of the power take-off shaft by a gear means.
6. A powertake-off mechanism, substantially as described with reference to the accompanying drawings.
GB8630866A 1985-12-26 1986-12-24 Power take-off mechanism Expired GB2185550B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR850017682 1985-12-26

Publications (3)

Publication Number Publication Date
GB8630866D0 GB8630866D0 (en) 1987-02-04
GB2185550A true GB2185550A (en) 1987-07-22
GB2185550B GB2185550B (en) 1989-11-22

Family

ID=19247557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8630866A Expired GB2185550B (en) 1985-12-26 1986-12-24 Power take-off mechanism

Country Status (2)

Country Link
GB (1) GB2185550B (en)
IN (1) IN168225B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657309A1 (en) * 1990-01-25 1991-07-26 Peugeot Transverse motorized propulsion unit equipped with a power take-off
GB2245389B (en) * 1990-06-06 1994-04-13 Advanced Door Syst Ltd Improvements in and relating to door operators

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1536921A (en) * 1976-01-15 1978-12-29 Coal Ind Auxiliary drive mechanism
GB2051299A (en) * 1979-04-27 1981-01-14 Carle & Montanari Spa Apparatus for coupling and uncoupling of a kinematic mechanism in which a stepwise rotary motion is imparted
GB2150255A (en) * 1983-11-22 1985-06-26 Dowty Meco Ltd Drive arrangement for conveyor chains

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1536921A (en) * 1976-01-15 1978-12-29 Coal Ind Auxiliary drive mechanism
GB2051299A (en) * 1979-04-27 1981-01-14 Carle & Montanari Spa Apparatus for coupling and uncoupling of a kinematic mechanism in which a stepwise rotary motion is imparted
GB2150255A (en) * 1983-11-22 1985-06-26 Dowty Meco Ltd Drive arrangement for conveyor chains

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657309A1 (en) * 1990-01-25 1991-07-26 Peugeot Transverse motorized propulsion unit equipped with a power take-off
GB2245389B (en) * 1990-06-06 1994-04-13 Advanced Door Syst Ltd Improvements in and relating to door operators

Also Published As

Publication number Publication date
GB2185550B (en) 1989-11-22
GB8630866D0 (en) 1987-02-04
IN168225B (en) 1991-02-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19941224