CN203348495U - Double-power-flow speed-changing box for bulldozer - Google Patents
Double-power-flow speed-changing box for bulldozer Download PDFInfo
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- CN203348495U CN203348495U CN 201320436167 CN201320436167U CN203348495U CN 203348495 U CN203348495 U CN 203348495U CN 201320436167 CN201320436167 CN 201320436167 CN 201320436167 U CN201320436167 U CN 201320436167U CN 203348495 U CN203348495 U CN 203348495U
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- hydraulic
- bulldozer
- double
- gearbox
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Abstract
The utility model discloses a double-power-flow speed-changing box for a bulldozer. The double-power-flow speed-changing box for the bulldozer comprises an input component, a machine part and an output component and further comprises a hydraulic part and a power synthesis part; two power transfer paths of the speed-changing box specifically are a mechanical transmission path and a hydraulic transmission path, wherein according to the mechanical transmission path, a part of power input by the input component is output to the power synthesis part through the machine part; according to the hydraulic transmission path, a part of power input by the input component is output to the power synthesis part through the hydraulic part; the power synthesis part and the output component are connected. Compared with the traditional hydraulic and mechanical transmission, the transmission of the speed-changing box disclosed by the utility model has the advantages that the transmission efficiency is high, the range of a high-efficiency area is wider, and the fuel consumption can be reduced; meanwhile, according to the infinitely variable speed, the efficiency of an engine can be fully absorbed in a wider vehicle speed range, and the engine greatly keeps working at the maximum efficiency point, so that the working efficiency of the whole machine and the fuel oil economy are greatly improved.
Description
Technical field
The utility model relates to technical field of engineering machinery, especially relates to a kind of bulldozer double power flow gearbox.
Background technique
The bulldozer power train extensively adopts two kinds of hydraulic machine transmissions at present, and the one, dynamic power shift gear box and fluid torque converter combination transmission, the 2nd, all-hydraulic (or hydrostatic) transmission.The hydraulic machine transmission has good dynamic property, handiness, the manufacturing efficiency advantages of higher, but its efficiency that can't realize stepless change and torque-converters is not high, bulldozer need to convert travelling speed and advance and retreat direction frequently in when operation work in addition, has more reduced its advantage on aspect overall efficiency.
Publication number be CN102359133, the application title be " a kind of hydraulic system of bulldozer " and application for a patent for invention in a kind of all-hydraulic transmission system is disclosed, the accumulator of this system connects braking in a turn valve, speed change valve, pilot handle by solution charging relief valve, and form loop between hydraulic oil container, one-way valve, working pump, operating valve, torque-converters, radiator, lubricated valve, make hydraulic oil to recycle; Hydraulic oil container, oil sources pump, filter, solution charging relief valve, accumulator connect successively, solution charging relief valve is connected with special brake valve, speed change valve, pilot handle respectively, and the braking in a turn valve connects steering box and hydraulic oil container successively, speed change valve connects gearbox and hydraulic oil container successively, and pilot handle connects operating valve.This all-hydraulic transmission not only can realize stepless change, and there is good load character under low engine speed, vehicle also can have been given play to maximum drawbar pull when the motor slow-speed of revolution, this trailed model machinery such for bulldozer is particularly important, but that shortcoming is the overall transmission efficiency of all-hydraulic transmission is not high.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming existed in prior art, the advantages such as a kind of integrated mechanical transmission high efficiency, good dynamic property and stepless speed changing with hydraulic transmission, the good advantages such as traction property double power flow gearbox are provided, and this gearbox has significantly improved operating efficiency and the fuel economy of complete machine.The technological scheme adopted is: a kind of bulldozer double power flow gearbox, comprise input block, mechanical part and output block, it is characterized in that: described gearbox also comprises hydraulic part and power coupling part, and the power transmission line of this gearbox comprises two: one is that the part power of input block input is outputed to the mechanical transmission route of power coupling part through mechanical part; Another is to export the part power of input block input the hydraulic transmission route of power coupling part to through hydraulic part, and the power coupling part is connected with described output block.
Technical characteristics of the present utility model also has: also be provided with the powershift clutch between described input block and mechanical part.
Technical characteristics of the present utility model also has: described power coupling is partly planetary power confluence structure.
Technical characteristics of the present utility model also has: described planetary power confluence structure comprises sun gear (T), and the power in described mechanical transmission route inputs to described power coupling part through described sun gear (T).
Technical characteristics of the present utility model also has: described planetary power confluence structure comprises gear ring (Q), and the power in described hydraulic transmission route inputs to described power coupling part through described gear ring (Q).
Technical characteristics of the present utility model also has: the power of described power coupling part is exported by planet carrier (J).
Technical characteristics of the present utility model also has: described hydraulic part comprises oil hydraulic pump and oil hydraulic motor.
The beneficial effects of the utility model are: 1) output speed of this gearbox can change according to the variation of external load, realizes the stepless shift function of gearbox in a big way; 2) this gearbox can be by realizing pure mechanical transmission by the hydraulic transmission locking, greatly improved the total transmission efficiency of gearbox, and in low velocity zone, can make mechanical transmission be output as zero, realize pure hydraulic transmission, bulldozer hauling ability and stepless change ability are greatly improved; 3) this gearbox combines the advantages such as mechanical transmission high efficiency, good dynamic property and stepless speed changing with hydraulic transmission, good advantages such as traction property, has formed comparatively desirable transfer unit.With traditional hydraulic machine transmission, compare, its transmission efficiency is high, and efficient district scope is wide, can reduce fuel consumption.Simultaneously, its stepless change can fully absorb engine efficiency in wider vehicle speed range, makes motor remain on preferably pressure point of maximum efficiency work, has improved greatly complete machine operating efficiency and fuel economy.
The accompanying drawing explanation
Accompanying drawing 1 is the utility model structural representation, and wherein 1 is input block, the 2nd, and powershift clutch, the 3rd, mechanical part, the 4th, the power coupling part, the 5th, output block, the 6th, hydraulic part, J is planet carrier, Q is gear ring, and T is sun gear, and I, II, III, R, F mean the gear clutch.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.The utility model discloses a kind of bulldozer double power flow gearbox, comprise input block 1, powershift clutch 2, mechanical part 3, power coupling part 4 and output block 5.Wherein mechanical part 3 is comprised of dynamic power shift gear box, can realize gearshift and commutation function, R, F, III, II, I are representing respectively the gear clutch, its Main Function is shifted gears, for example when R and III clutch simultaneously in conjunction with the time gear for retreating three gears, the combination simultaneously of F and II clutch, gear is two gears that advance.Hydraulic part 6 is comprised of oil hydraulic pump and oil hydraulic motor, and power coupling part 4 is by power coupling by planetary gear train.
This double power flow gearbox has two power transmission lines, and one is by the part power of input end, by mechanical part 3, outputs to power coupling part 4.Another is that the oil hydraulic pump by hydraulic part 6 changes into hydraulic energy by mechanical energy by the part power of input end, by oil hydraulic motor, become the form of mechanical energy to be delivered to power coupling part 4 hydraulic energy transfer again, two-part power converges output in the planet differential mechanism of power coupling part 4.Mechanical transmission power is by sun gear T input, and hydraulic pressure transfer power is by gear ring Q input, and planet row is by sun gear T and gear ring Q input, planet carrier J output.Two-part power converges output in the planetary power confluence structure of power coupling part 4.
The planetary mechanism kinematical equation of power coupling part 4:
NT+αNQ=（1+α）NJ （1.1）
NT: sun gear rotating speed (r/min); NQ: gear ring rotating speed (r/min); NJ: planet carrier rotating speed (r/min);
α: the planet row characteristic parameter, α=ZQ/ZT, ZQ is the gear ring number of teeth, ZT is the sun gear number of teeth;
From formula 1.1, the rotating speed of each gear output of this double power flow gearbox is relevant with the planet row special parameter (α) of the planet row special parameter (affecting NT) of hydraulic motor rotary speed (affecting NQ) and mechanical part 3 and power coupling part 4.When the variation of external load, output speed can change and change with motor rotary speed, thereby realizes the stepless shift function in gearbox in a big way.
Equally because engine power is passed through machinery and the two-part transmission of hydraulic pressure, and by planet differential mechanism interflow, only Partial Power passes through hydraulic transmission, the hydraulic transmission locking can be become to pure mechanical transmission in case of necessity, so the total transmission efficiency of this double power flow gearbox improves greatly, and by powershift clutch 2, can make mechanical transmission be output as zero in low velocity zone, and become pure hydraulic transmission, bulldozer hauling ability and stepless change ability are greatly improved.
Because the transmission of power is two-part synthetic through mechanical part 3 and hydraulic part 6, so the planet row special parameter (α) of the planet row special parameter (affecting NT) of the rotating speed of each gear output and hydraulic motor rotary speed (affecting NQ) and mechanical part 3 and power coupling part 4 is relevant.When the variation of external load, output speed can change and change with motor rotary speed, thereby realizes the stepless shift function in gearbox in a big way.
Certainly; above-mentioned explanation is not limitation of the utility model; the utility model also is not limited only to above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also belong to protection domain of the present utility model.
Claims (7)
1. a bulldozer double power flow gearbox, comprise input block, mechanical part and output block, it is characterized in that: described gearbox also comprises hydraulic part and power coupling part, and the power transmission line of this gearbox comprises two: one is that the part power of input block input is outputed to the mechanical transmission route of power coupling part through mechanical part; Another is to export the part power of input block input the hydraulic transmission route of power coupling part to through hydraulic part, and the power coupling part is connected with described output block.
2. according to bulldozer claimed in claim 1 double power flow gearbox, it is characterized in that: also be provided with the powershift clutch between described input block and mechanical part.
3. according to the described bulldozer of claim 1 or 2 double power flow gearbox, it is characterized in that: described power coupling is partly planetary power confluence structure.
4. according to bulldozer claimed in claim 3 double power flow gearbox, it is characterized in that: described planetary power confluence structure comprises sun gear (T), and the power in described mechanical transmission route inputs to described power coupling part through described sun gear (T).
5. according to bulldozer claimed in claim 3 double power flow gearbox, it is characterized in that: described planetary power confluence structure comprises gear ring (Q), and the power in described hydraulic transmission route inputs to described power coupling part through described gear ring (Q).
6. according to the described bulldozer of claim 1 or 2 double power flow gearbox, it is characterized in that: the power of described power coupling part is exported by planet carrier (J).
7. according to the described bulldozer of claim 1 or 2 double power flow gearbox, it is characterized in that: described hydraulic part comprises oil hydraulic pump and oil hydraulic motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320436167 CN203348495U (en) | 2013-07-22 | 2013-07-22 | Double-power-flow speed-changing box for bulldozer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320436167 CN203348495U (en) | 2013-07-22 | 2013-07-22 | Double-power-flow speed-changing box for bulldozer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203348495U true CN203348495U (en) | 2013-12-18 |
Family
ID=49748400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320436167 Expired - Lifetime CN203348495U (en) | 2013-07-22 | 2013-07-22 | Double-power-flow speed-changing box for bulldozer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203348495U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351462A (en) * | 2015-11-24 | 2016-02-24 | 山推工程机械股份有限公司 | Transmission for bulldozer |
| CN106838154A (en) * | 2016-12-14 | 2017-06-13 | 山推工程机械股份有限公司 | A kind of manual transmission |
| CN109780147A (en) * | 2019-02-28 | 2019-05-21 | 东华大学 | A kind of bull-dozer gearbox |
-
2013
- 2013-07-22 CN CN 201320436167 patent/CN203348495U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351462A (en) * | 2015-11-24 | 2016-02-24 | 山推工程机械股份有限公司 | Transmission for bulldozer |
| CN106838154A (en) * | 2016-12-14 | 2017-06-13 | 山推工程机械股份有限公司 | A kind of manual transmission |
| CN109780147A (en) * | 2019-02-28 | 2019-05-21 | 东华大学 | A kind of bull-dozer gearbox |
| CN109780147B (en) * | 2019-02-28 | 2022-03-04 | 东华大学 | Gearbox for bulldozer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |