KR20170046361A - Planet Gear Transmission Apparatus for Working Machine - Google Patents

Planet Gear Transmission Apparatus for Working Machine Download PDF

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Publication number
KR20170046361A
KR20170046361A KR1020150146591A KR20150146591A KR20170046361A KR 20170046361 A KR20170046361 A KR 20170046361A KR 1020150146591 A KR1020150146591 A KR 1020150146591A KR 20150146591 A KR20150146591 A KR 20150146591A KR 20170046361 A KR20170046361 A KR 20170046361A
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KR
South Korea
Prior art keywords
gear
planetary gear
working machine
double pinion
planetary
Prior art date
Application number
KR1020150146591A
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Korean (ko)
Inventor
김민수
Original Assignee
현대중공업 주식회사
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Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020150146591A priority Critical patent/KR20170046361A/en
Publication of KR20170046361A publication Critical patent/KR20170046361A/en

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    • 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
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • 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
    • B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
    • 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
    • B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
    • B60K17/24—Arrangements of mountings for shafting
    • 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
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion

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

Abstract

The present invention relates to a planetary gear transmission for a working machine, including: a double pinion planetary gear device formed on an input shaft for transmitting power of an engine of a working machine, and performing forward and backward movement; an input gear rotated by the double pinion planetary gear device; first and second clutches for controlling rotation of the double pinion planetary gear device; and an output gear formed on an output shaft for transmitting power to an axle of the working machine, and having an output gear engaged with the input gear. An object of the present invention is to provide a planetary gear transmission for a working machine capable of achieving miniaturization while minimizing the number of parts and improving fuel efficiency.

Description

TECHNICAL FIELD [0001] The present invention relates to a planetary gear transmission for a working machine,

The present invention relates to a planetary transmission for a working machine.

Due to the diversity of work to be done in the industrial field, the working machine can be divided into excavation equipment, loading equipment, conveying equipment, loading equipment, compaction equipment, foundation equipment, etc. Specifically, It is a concept that includes equipment of the kind.

In general, a forklift, which is a working machine, is a device for driving a work device by using an operation lever to lift and lower a relatively heavy load or to transport the load to a desired position in a limited working environment.

These forklifts are divided into engine forklifts and electric forklifts. Engine forklift trucks are widely used in the outdoor area, while electric forklift trucks are often used in the indoor area due to low smoke and noise.

In addition, the forklift is classified into a standard forklift, in which the mast assembly is fixed to the vehicle body, and a reach type forklift, in which the mast assembly moves back and forth with respect to the vehicle body along the rich lag. The engine type is equipped with an engine, and the electric type and the rich type forklift are so-called electric forklifts equipped with an electric motor and a battery for supplying electric power thereto.

The power transmission device of such a forklift is composed of an engine, a transmission, and an axle. Here, the transmission shifts the power generated by the engine to the required rotational force according to the speed and transmits it to the axle, and performs the driving, the power take-off (PTO), and the forward / rearward switching.

For example, for small forklift trucks of 1.5 to 3.3 tonnage, there are one for forklift trucks, two for forklift trucks of 3.5 to 4.5 tonnage, and two for forklift trucks of 3.5 to 4.5 tonnage. Three-tier for medium-sized forklift trucks, and three for large-sized forklifts with 11 to 25-ton class.

A small-sized forklift having a single-stage transmission has a forward-reverse gear ratio of 1: 1. The input shaft is provided with a forward input gear and a reverse input gear. An output shaft is provided with a forward output gear and a reverse output gear. In addition, a shift device having an idler gear for idler shaft transmission for power transmission is applied at the time of reverse travel.

As described above, the conventional transmission is constituted by three shafts, the number of parts is large, the length and weight are heavy, the cost of the forklift can not be reduced, and the electric field is long, which lowers the competitiveness of the product. And to improve the fuel efficiency while miniaturizing the size.

Korean Patent Publication No. 2002-0013364 (published on Feb. 20, 2002)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a planetary gear transmission for a working machine capable of achieving miniaturization while minimizing the number of components and improving fuel efficiency, .

A planetary gear transmission for a working machine according to an aspect of the present invention includes: a double pinion planetary gear device formed on an input shaft that transmits power of an engine of a working machine, An input gear rotated by the double pinion planetary gear set; First and second clutches for controlling rotation of the double pinion planetary gear set; And an output gear formed on an output shaft for transmitting power to the axle of the working machine, the output gear being engaged with the input gear.

Specifically, the double pinion planetary gear device includes: a sun gear formed on the input shaft that transmits power of the engine; A plurality of inner planetary gears engaged with the sun gear and revolving or revolving along the circumferential direction of the sun gear; A plurality of outer planetary gears engaged with the inner planetary gear and revolving or revolving along the circumferential direction of the sun gear; A carrier to which the inner and outer planetary gears are rotatably coupled; And a ring gear that rotates in engagement with the outer planetary gear.

Specifically, the double pinion planetary gear set has one inner pinion structure and one outer pinion structure as a double pinion structure so as to realize a forward / reverse gear ratio of 1: 1, and the one set of double pinion structures are spaced apart at regular intervals ≪ / RTI >

Specifically, the first clutch is operated by the first return spring and the hydraulic pressure, and can be installed between the ring gear and the gear case.

Specifically, the second clutch is operated by the second return spring and the hydraulic pressure, and can be installed between the input shaft and the carrier.

Specifically, the second clutch is actuated by a second return spring and hydraulic pressure, and can be installed between the carrier and the ring gear.

Specifically, in the parking mode of the working machine, the first and second return springs are filled with pressurized oil, respectively, so that the first and second clutches are pushed, respectively, and the first and second clutches are engaged So that power transmission is not made from the input shaft to the output shaft.

Specifically, when the working machine is in the forward mode, the first clutch is disengaged from the first clutch by the pressure of the first return spring, and the second clutch held in the engaged state maintains the double- The input gear, the output gear, and the output shaft, in which power transmission is integrated with the input shaft, by rotating the entire gear device integrally with the input shaft.

Specifically, when the working machine is in the reverse mode, the second clutch is disengaged from the second clutch due to the pressure loss of the second return spring, and the first clutch held in the engaged state releases the ring gear The power transmission may be performed in the order of the input shaft, the sun gear, the inner planetary gear, the outer planetary gear, the carrier, the input gear, the output gear, and the output shaft.

Specifically, the working machine may be a small forklift having a forward / reverse gear ratio of 1: 1 and a single shift speed.

The planetary gear transmission for a working machine according to the present invention is provided with a double pinion planetary gear structure on the input shaft so as to maintain a forward / reverse gear ratio of 1: 1 and one output gear on the output shaft, The structure can be simplified to a biaxial structure, cost can be reduced, miniaturization can be achieved on the electric field side, and fuel efficiency can be improved.

1 is a configuration diagram of a power transmitting apparatus of a work machine to which a planetary gear transmission for a working machine is applied according to an embodiment of the present invention.
2 is a sectional view of a planetary gear transmission for a working machine according to an embodiment of the present invention.
3 is a partially cutaway perspective view showing a gear structure provided on an input shaft and an output shaft of a planetary gear transmission for a working machine according to an embodiment of the present invention.
4 is a perspective view showing a double pinion planetary gear device of a planetary gear transmission for a working machine according to an embodiment of the present invention.
5 is a sectional view of a planetary transmission for a working machine according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of a planetary gear transmission for a working machine according to an embodiment of the present invention; FIG. 2 is a cross-sectional view of a planetary gear transmission for a working machine according to an embodiment of the present invention; And FIG. 3 is a partially cutaway perspective view illustrating a gear structure provided on an input shaft and an output shaft of a planetary gear transmission for a working machine according to an embodiment of the present invention. FIG. Fig. 5 is a sectional view of a planetary gear transmission for a working machine according to another embodiment of the present invention. Fig. 5 is a perspective view showing a double pinion planetary gear set of the planetary gear set.

As shown in Fig. 1, the planetary transmission 100 for a work machine according to the embodiment of the present invention can be applied to the power transmission device 10 of the work machine 1. Fig. Here, the working machine 1 may be a forklift, a bulldozer, an excavator, or the like.

The planetary transmission 100 for a working machine according to the present invention can be applied to a small work machine and has a forward gear ratio of 1: May be desirable.

The power transmitting apparatus 10 may be constituted by an engine 11, a planetary transmission 100, and an axle 12. [

The planetary transmission 100 is connected to the engine 11 by an input shaft 101 and to the axle 12 by an output shaft 102.

This planetary transmission device 100 can change the power generated by the engine 11 to the required rotational force according to the speed and transmit it to the axle 12 and can take charge of the running, the power take- And will be described in detail below.

2 to 4, a planetary gear transmission 100 for a working machine according to an embodiment of the present invention includes a double pinion planetary gear set 110, an input gear 120, a first clutch 130, a second clutch 140, and an output gear 150. The planetary transmission device 100 may be installed inside the gear case 103 that forms the skeleton and the appearance.

The double pinion planetary gear set 110 is provided in the gear case 103 and can be formed on the input shaft 101 that transmits the power of the engine 11 of the working machine 1, The inner sun gear 112 and the outer sun gear 112 so that power can be transmitted to the axle 12 through the output shaft 102 on which the output gear 150 to be described later is formed by rotating the sun gear 111, A planetary gear 113, a carrier 114, and a ring gear 115, as shown in Fig. The double pinion planetary gear set 110 can be controlled in its rotational state for forward and reverse by the first and second clutches 140, which will be described later.

The sun gear 111 can be formed on the input shaft 101 that transmits the power of the engine 11 and can be engaged with the inner planetary gear 112 to be described later.

The inner planetary gear 112 can engage with the sun gear 111 and revolve along the circumferential direction of the rotating or sun gear 111. The inner planetary gears 112 are engaged with the outer planetary gears 113 to be described later to form one set of double pinion structures, and a plurality of the inner planetary gears 112 may be provided at regular intervals.

The outer planetary gear 113 can engage with the inner planetary gear 112 and revolve with the inner planetary gear 112 along the circumferential direction of the rotating or sun gear 111. [ The outer planetary gears 113 are meshed with the inner planetary gears 112 to form one set with a double pinion structure and a plurality of the same number as the inner planetary gears 112 can be provided at regular intervals.

The carrier 114 can be coupled such that the inner planetary gear 112 and the outer planetary gear 113 are rotatable.

The ring gear 115 can be engaged with the outer planetary gear 113 and rotated.

The double pinion planetary gear set 110 having the above-described configuration has one set of the inner and outer planetary gears 112 and 113 as a double pinion structure so as to realize a forward / reverse gear ratio of 1: 1, It may be preferable that the double pinion structures are spaced apart at regular intervals so as to be constituted by three sets.

The input gear 120 may be connected to the carrier 114 so as to be rotatable by the double pinion planetary gear set 110.

The input gear 120 does not rotate when the first and second clutches 130 and 140 to be described later are engaged as in the parking mode of the working machine 1. [

The input gear 120 is configured such that when the first clutch 130 to be described later is disengaged and the second clutch 140 to be described later is fastened as in the forward mode of the working machine 1, And rotates in the same direction as the rotation of the input shaft 101.

The input gear 120 is configured such that when the first clutch 130 to be described later is engaged and the second clutch 140 to be described later is disengaged as in the reverse mode of the working machine 1, And rotates in a direction opposite to the rotation of the input shaft 101.

The first clutch 130 can be operated by the first return spring 131 and the oil pressure, and can be installed between the ring gear 115 and the gear case 103.

The first clutch 130 can control the rotation of the double pinion planetary gear set 110 according to the parking mode, the forward mode, and the reverse mode of the working machine 1. A detailed description will be given later.

The second clutch 140 can be operated by the second return spring 141 and the hydraulic pressure so that the entire double pinion planetary gear unit 110 can rotate integrally with the input shaft 101 when the double pinion planetary gear unit 110 is engaged, May be installed between the input shaft 101 and the carrier 114 as shown in Fig. 2 and may be installed between the carrier 114 and the ring gear 115 as shown in Fig.

The second clutch 140 can control the rotation of the double pinion planetary gear set 110 according to the parking mode, the forward mode, and the reverse mode of the working machine 1, and a detailed description thereof will be described later.

The output gear 150 can be formed on the output shaft 102 that transmits power to the axle 12 of the work machine 1 and can be engaged with the input gear 120.

The first clutch 130 and the second clutch 140 control the rotation of the double pinion planetary gear set 110 according to the parking mode, forward mode and reverse mode of the work machine 1, 1), parking, forward, and reverse are implemented.

In the parking mode of the working machine 1, the first and second return springs 141 are filled with pressurized oil to push the first and second clutches 130 and 140, respectively, and the first and second clutches 130 And 140 are maintained in the engaged state, so that the power transmission is not made to the output shaft 102 in the input shaft 101. At this time, the input gear 120 does not rotate and parking of the work machine 1 can be realized.

When the shift from the parking mode to the forward mode of the working machine 1 is completed, the first return spring 131 is not pressurized and the first clutch 130 is disengaged, and the second The double pinion planetary gear set 110 as a whole is rotated integrally with the input shaft 101 by the clutch 140 so that the double pinion planetary gear set 110 in which the power transmission is integrated with the input shaft 101, The output gear 150, and the output shaft 102 in this order. At this time, the input gear 120 rotates in the same direction as the rotation of the input shaft 101, so that advancement of the work machine 1 can be realized.

When the shift from the parking mode of the working machine 1 to the reverse mode is performed, the pressure oil filled in the second return spring 141 is released and the second clutch 140 is maintained in a disengaged state, The ring gear 115 is fixed by the clutch 130 so that the power transmission is transmitted to the input shaft 101, the sun gear 111, the inner planetary gear 112, the outer planetary gear 113, the carrier 114, 120, the output gear 150, and the output shaft 102 in this order.

At this time, the input gear 120 is rotated in the direction opposite to the rotation of the input shaft 101, so that the backward movement of the work machine 1 can be realized.

Thus, in this embodiment, the double pinion planetary gear structure is provided on the input shaft so as to maintain the forward / reverse gear ratio of 1: 1, and the single output gear is provided on the output shaft. So that the cost can be reduced, the fuel efficiency can be improved, and the size can be reduced on the electric field side.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art that various combinations and modifications may be made without departing from the scope of the present invention. Therefore, it should be understood that the technical contents related to the modifications and applications that can be easily derived from the embodiments of the present invention are included in the present invention.

1: work machine 10: power transmission device
11: engine 12: axle
100: planetary transmission device 101: input shaft
102: output shaft 103: gear case
110: double pinion planetary gear unit 111: sun gear
112: inner planetary gears 113: outer planetary gears
114: carrier 115: ring gear
120: input gear 130: first clutch
131: first return spring 140: second clutch
141: second return spring 150: output gear

Claims (10)

A double pinion planetary gear device formed on an input shaft for transmitting power of an engine of a working machine and realizing forward and reverse;
An input gear rotated by the double pinion planetary gear set;
First and second clutches for controlling rotation of the double pinion planetary gear set; And
And an output gear formed on an output shaft for transmitting power to an axle of the working machine, the output gear engaged with the input gear. The double-pinion type planetary gear set according to claim 1,
A sun gear formed on the input shaft for transmitting power of the engine;
A plurality of inner planetary gears engaged with the sun gear and revolving or revolving along the circumferential direction of the sun gear;
A plurality of outer planetary gears engaged with the inner planetary gear and revolving or revolving along the circumferential direction of the sun gear;
A carrier to which the inner and outer planetary gears are rotatably coupled; And
And a ring gear rotatably engaged with the outer planetary gear. 3. The double pinion planetary gear set according to claim 2,
Wherein the inner and outer planetary gears constitute one set as a double pinion structure to realize a forward gear ratio of 1: 1, and the one set of double pinion structures are constituted of three sets spaced apart at regular intervals. For planetary transmission. 3. The automatic transmission according to claim 2,
Wherein the first planetary gear mechanism is operated by a first return spring and hydraulic pressure, and is installed between the ring gear and the gear case. 5. The automatic transmission according to claim 4,
Wherein the first planetary gear mechanism is operated by a second return spring and hydraulic pressure, and is installed between the input shaft and the carrier. 5. The automatic transmission according to claim 4,
And the second planetary gear unit is operated by a second return spring and hydraulic pressure, and is installed between the carrier and the ring gear. 7. The parking brake system according to claim 5 or 6, wherein in the parking mode of the working machine,
The first and second return springs are each pressurized to press each of the first and second clutches so that the first and second clutches are engaged with each other so that the power transmission is transmitted from the input shaft to the output shaft And the planetary gear set is not formed. 8. The apparatus according to claim 7, wherein, in the forward mode of the working machine,
Pinion planetary gear set is rotated integrally with the input shaft by the second clutch held in the engaged state while the first clutch is disengaged due to the loss of the pressure oil filled in the first return spring , The double pinion planetary gear unit in which the power transmission is integrated with the input shaft, the input gear, the output gear, and the output shaft in this order. 8. The apparatus according to claim 7, wherein, in the backward mode of the working machine,
And the ring gear is fixed by the first clutch held in the engaged state, so that the power transmission is transmitted to the input shaft, the sun gear, The output gear, the output shaft, the inner planetary gear, the outer planetary gear, the carrier, the input gear, the output gear, and the output shaft. The work machine according to claim 1,
Is a small forklift having a forward / reverse gear ratio of 1: 1 and a number of stages of running speed change.
KR1020150146591A 2015-10-21 2015-10-21 Planet Gear Transmission Apparatus for Working Machine KR20170046361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150146591A KR20170046361A (en) 2015-10-21 2015-10-21 Planet Gear Transmission Apparatus for Working Machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150146591A KR20170046361A (en) 2015-10-21 2015-10-21 Planet Gear Transmission Apparatus for Working Machine

Publications (1)

Publication Number Publication Date
KR20170046361A true KR20170046361A (en) 2017-05-02

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Application Number Title Priority Date Filing Date
KR1020150146591A KR20170046361A (en) 2015-10-21 2015-10-21 Planet Gear Transmission Apparatus for Working Machine

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