CN114278713A - Hydraulic transmission case of small-tonnage forklift - Google Patents
Hydraulic transmission case of small-tonnage forklift Download PDFInfo
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- CN114278713A CN114278713A CN202111577273.9A CN202111577273A CN114278713A CN 114278713 A CN114278713 A CN 114278713A CN 202111577273 A CN202111577273 A CN 202111577273A CN 114278713 A CN114278713 A CN 114278713A
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- 230000005540 biological transmission Effects 0.000 title claims description 22
- 239000000446 fuel Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a hydraulic gearbox of a small-tonnage forklift, which comprises a torque converter shell, a torque converter assembly, an oil supply pump assembly, a front shell, a control valve assembly, a forward gear clutch, a rear shell and a reverse gear clutch, wherein the torque converter shell is connected with the front shell through bolts; the forward gear clutch is provided with a driving wheel and a forward gear; the reverse gear clutch is provided with a driven wheel and a reverse gear, friction plates arranged at intervals are arranged in the two clutches, the friction plates are meshed with the corresponding forward gear or reverse gear, and the driving wheel and the driven wheel are respectively connected with the forward gear clutch shaft and the reverse gear clutch shaft. The invention has compact structure and meets the demand of different markets of small-tonnage forklifts on the miniaturization of the forklifts.
Description
Technical Field
The invention relates to the technical field of forklift transmission systems, in particular to a hydraulic gearbox of a forklift.
Background
The application of industrial vehicles is still the most widely applied to small-tonnage diesel fork trucks in the material handling industry. However, the application of a hydraulic transmission (hereinafter referred to as a "transmission") on an internal combustion forklift still occupies more than half of the share, the main function of the hydraulic transmission is to meet the requirements of starting, accelerating, long-distance high-speed transportation, reversing, climbing and the like of a vehicle under various working conditions, and a hydraulic torque converter assembly (hereinafter referred to as a "torque converter") in the transmission works together with an engine to output the rotating speed and the torque required by the vehicle under various working conditions, so that the requirements of the power performance and the economy of the vehicle are met. Compared with the common gearbox, the stepless speed regulation transmission has the advantages of stepless speed regulation, stable transmission, good trafficability of the whole vehicle, good controllability and the like, thereby being widely and continuously applied.
The hydraulic transmission gearbox comprises a torque converter shell connected with an engine, a torque converter assembly, a hydraulic control system, a rear shell, a forward gear clutch, a reverse gear clutch, an output gear shaft and the like. The following problems remain with conventional hydrodynamic transmission gearbox designs and uses:
firstly, different torque converter shells need to be developed to match different engines, so that the development cost is high; secondly, the volume is large, and the miniaturization requirement of the narrow-channel forklift applied indoors cannot be met; thirdly, most of the small-ton gearboxes cannot meet the requirement of the whole vehicle on an additional power take-off (PTO); fourthly, potential safety hazards caused by the system in the using process cannot provide corresponding information prompt or solution measures for the whole vehicle; finally, the system cannot remind an operator of problems of inconvenient maintenance and the like.
Disclosure of the invention
Aiming at the problems of the prior technical scheme, the invention aims to overcome the defects of the prior gearbox, and specially provides a hydraulic transmission which is generally applicable to a small-tonnage forklift. The design of the PTO port with low torque output is realized by a simple structure and low cost, so that the PTO port can be used for driving a low-power heat dissipation pump, a rotating speed sensor capable of detecting the rotating direction is additionally arranged at the output end of a gearbox, an operating handle, a hydraulic control system and the like are also monitored while the output rotating speed is detected by an electric control system, then comprehensive judgment is carried out, and the potential safety hazard is eliminated. The gearbox has the advantages that the convenience and timeliness of maintenance are very important for improving the working efficiency in daily use, the design of the gearbox can remind an operator of timely maintenance, and parts needing to be maintained can be replaced very quickly.
In order to achieve the purpose, the invention provides the following technical scheme:
a hydraulic gearbox of a small-tonnage forklift comprises a torque converter shell, a torque converter assembly, an oil supply pump assembly, a front shell, a control valve assembly, a forward gear clutch, a rear shell and a backward gear clutch, wherein the torque converter shell is connected with the front shell through bolts; the reverse gear clutch is provided with a driven wheel and a reverse gear; friction plates and separation plates which are arranged at intervals are arranged in the two clutches, the friction plates are meshed with corresponding forward gear gears or reverse gear gears, and the driving wheel and the driven wheel are respectively connected with the forward gear clutch shaft and the reverse gear clutch shaft through welding; an output gear shaft in the gearbox is respectively meshed with the forward gear and the backward gear, and a rotating speed sensor capable of detecting the rotating direction is arranged on the end face of the output gear shaft gear.
In a further improvement of this aspect, the turbine shaft of the torque converter assembly and the forward clutch shaft are connected by a spline to transmit power to the forward clutch.
As a further improvement of the scheme, in the advancing working condition, the advancing gear clutch is combined, and power is transmitted to the output gear shaft through the advancing gear and then transmitted to the wheels through the drive axle, so that the advancing operation of the vehicle is realized.
As a further improvement of the scheme, in the backward working condition, power passes through the forward gear clutch shaft, the driving wheel and the driven wheel transmit the power to the backward clutch shaft, and after the backward gear clutch is combined, the power is transmitted to the output gear shaft through the backward clutch gear and then transmitted to the wheel through the drive axle, so that the backward operation of the vehicle is realized.
As a further improvement of the scheme, the power drives the oil supply pump assembly through the pump hub of the torque converter assembly, so that the oil supply pump assembly is ensured to be in a working state under any working condition, and the whole-course oil supply requirement of the system is met.
As a further improvement of the scheme, a PTO port with low torque output is arranged outside the shell of the torque converter.
As a further improvement of the scheme, the coarse oil filter and the fine oil filter are respectively and correspondingly arranged on the front shell and the rear shell.
Compared with the prior art, the beneficial effects of the invention are that: 1. compared with the prior art, the three-section type shell is convenient to install, the size of the gearbox body is reduced, casting and machining are convenient, the same torque converter shell blank can be suitable for installation and connection of different engines, and development and maintenance cost is reduced.
2. The gearbox is compact in structure, free of redundant structures and redundant functions, small in size and capable of meeting the requirements of various types of forklifts on size miniaturization.
3. The PTO port capable of outputting low torque is added, a low-power heat dissipation pump can be driven, the requirement of a forklift on heat dissipation of a wet bridge is met, the high requirement is met at low cost, and meanwhile, the application range of the gearbox is widened.
4. The rotating speed sensor on the added output gear shaft detects the rotating speed and the actual running direction of the whole vehicle, when the control signal is inconsistent with the actual running direction, the system monitors and carries out safety processing in real time, and the requirement of European and American areas on higher and higher functional safety can be met.
5. The maintenance is convenient, parts needing regular maintenance such as a coarse oil filter and a fine oil filter are arranged at positions which can be reached by a tentacle, rapid and rapid replacement can be carried out, a pressure switch is arranged in the fine filter 22 on the gearbox, on-off switching value signal output can be provided for a control system, and an operator can be reminded to maintain in time.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic view of the internal construction of the transmission assembly of the present invention;
FIG. 2 is a schematic diagram of the internal components of the transmission of the present invention;
FIG. 3 is a schematic view of a transmission equipped with a coarse oil filter and a fine oil filter according to the present invention;
fig. 4 is a schematic view of the PTO port installation portion structure of the present invention.
Labeled in the drawings, 1-torque converter housing; 2-a torque converter assembly; 3-an oil supply pump assembly; 4-a front housing; 5-a control valve assembly; 6-forward clutch; 7-rear shell; 8-reverse gear clutch; 9-driving wheel; 10-; a forward gear; 11-a pump hub; a 12-turbine shaft; 13-forward gear clutch shaft; 14-friction plate; 15-a spacer; 16-output gear shaft; 17-a driven wheel; 18-reverse gear; 19-reverse gear clutch shaft; 20-rotating speed sensor. 21-rough oil filter; 22-fine oil filter; 23-PTO port.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
As shown in fig. 1-4, the hydraulic transmission for a small-tonnage forklift according to the present embodiment includes a torque converter housing 1, a torque converter assembly 2, a fuel feed pump assembly 3, a front housing 4, a control valve assembly 5, a forward gear clutch 6, a rear housing 7, and a reverse gear clutch 8, where the torque converter housing 1 is connected to the front housing 4 through bolts, the torque converter assembly 2 and the fuel feed pump assembly 3 are disposed in the torque converter housing 1, the control valve assembly 5 is disposed on an upper surface of the rear housing 7, the forward gear clutch 6 and the reverse gear clutch 8 are both disposed in the rear housing 7, the front housing 4 is connected to the rear housing 7 through bolts, and the forward gear clutch 6 is provided with a driving wheel 9 and a forward gear wheel 10; the reverse gear clutch 8 is provided with a driven wheel 17 and a reverse gear 18; friction plates 14 and separation plates 15 which are arranged at intervals are arranged in the two clutches, the friction plates 14 are meshed with corresponding forward gear gears 10 or reverse gear gears 18, and the driving wheel 9 and the driven wheel 17 are respectively connected with a forward gear clutch shaft 13 and a reverse gear clutch shaft 19 through welding; an output gear shaft 16 inside the transmission is engaged with the forward gear 10 and the reverse gear 18, respectively, and a rotation speed sensor 20 capable of detecting a rotation direction is provided on an end surface of the gear of the output gear shaft 16.
The turbine shaft 12 of the torque converter assembly 2 and the forward clutch shaft 13 are connected by a spline to transmit power to the forward clutch 6. In the forward working condition, the forward gear clutch 6 is combined, and power is transmitted to the output gear shaft 16 through the forward gear 10 and further transmitted to wheels through a drive axle, so that the forward running of the vehicle is realized. In the reverse operation mode, power is transmitted to the reverse clutch shaft 19 through the forward clutch shaft 13, the driving wheel 9 and the driven wheel 17, and after the reverse clutch 8 is engaged, the power is transmitted to the output gear shaft 16 through the reverse clutch gear 18 and further transmitted to the wheels through the drive axle, so that the reverse operation of the vehicle is realized. The power drives the oil supply pump assembly 3 through the pump hub 11 of the torque converter assembly 2, so that the oil supply pump assembly 3 is ensured to be in a working state under any working condition, and the whole-course oil supply requirement of the system is met.
In particular, the three-section type shell is convenient to install, the size of the gearbox body is reduced, the casting and the processing are convenient, the same shell blank of the torque converter can be suitable for the installation and the connection of different engines, the development and the maintenance cost are reduced,
the foregoing is merely exemplary and illustrative of the structure of the present invention and various modifications, additions and substitutions of similar embodiments may be made to the specific embodiments described by those skilled in the art without departing from the structure or scope of the invention as defined in the accompanying claims.
Claims (7)
1. A hydraulic gearbox of a small-tonnage forklift comprises a torque converter shell (1), a torque converter assembly (2), a fuel feed pump assembly (3), a front shell (4), a control valve assembly (5), a forward gear clutch (6), a rear shell (7) and a backward gear clutch (8), and is characterized in that the torque converter shell (1) is connected with the front shell (4) through bolts, the torque converter assembly (2) and the fuel feed pump assembly (3) are arranged in the torque converter shell (1), the control valve assembly (5) is arranged on the upper surface of the rear shell (7), the forward gear clutch (6) and the backward gear clutch (8) are both arranged in the rear shell (7), the front shell (4) is connected with the rear shell (7) through bolts, and a driving wheel (9) and a forward gear (10) are arranged on the forward gear clutch (6); a driven wheel (17) and a reverse gear (18) are arranged on the reverse gear clutch (8); friction plates (14) and separation pieces (15) which are arranged at intervals are arranged in the two clutches, the friction plates (14) are meshed with corresponding forward gear gears (10) or reverse gear gears (18), and the driving wheel (9) and the driven wheel (17) are respectively connected with a forward gear clutch shaft (13) and a reverse gear clutch shaft (19) through welding; an output gear shaft (16) inside the gearbox is respectively meshed with the forward gear (10) and the reverse gear (18), and a rotating speed sensor (20) capable of detecting the rotating direction is arranged on the end face of the gear of the output gear shaft (16).
2. The hydraulic transmission of a small tonnage forklift truck as set forth in claim 1, characterized in that the turbine shaft (12) of the torque converter assembly (2) and the forward clutch shaft (13) transmit power to the forward clutch (6) through a spline connection.
3. The hydraulic transmission case for the small-tonnage forklift truck as recited in claim 2, characterized in that in the forward working condition, the forward clutch (6) is engaged, and the power is transmitted to the output gear shaft (16) through the forward gear (10) and then transmitted to the wheels through the drive axle, so as to realize the forward running of the vehicle.
4. The hydraulic transmission case for the small-tonnage forklift truck as recited in claim 2, characterized in that in the backward operation mode, the power is transmitted to the backward clutch shaft (19) through the forward clutch shaft (13), the driving wheel (9) and the driven wheel (17), and after the backward clutch (8) is combined, the power is transmitted to the output gear shaft (16) through the backward clutch gear (18) and then transmitted to the wheels through the drive axle, so as to realize the backward operation of the vehicle.
5. The hydraulic transmission case for the small-tonnage forklift truck as recited in claim 1, characterized in that power drives the fuel feed pump assembly (3) through the pump hub (11) of the torque converter assembly (2) at the same time, ensuring that the fuel feed pump assembly (3) is in working condition under any working condition, so as to meet the whole-course fuel feed requirement of the system.
6. The hydraulic gearbox of small-tonnage forklift truck as recited in claim 1, characterized in that a PTO port (23) for low torque output is provided outside said torque converter housing (1).
7. The hydraulic transmission of a small-tonnage forklift truck as recited in claim 1, characterized in that the coarse oil filter (21) and the fine oil filter (22) are respectively and correspondingly disposed on the front housing (4) and the rear housing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111577273.9A CN114278713A (en) | 2021-12-22 | 2021-12-22 | Hydraulic transmission case of small-tonnage forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111577273.9A CN114278713A (en) | 2021-12-22 | 2021-12-22 | Hydraulic transmission case of small-tonnage forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114278713A true CN114278713A (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111577273.9A Pending CN114278713A (en) | 2021-12-22 | 2021-12-22 | Hydraulic transmission case of small-tonnage forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114278713A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07246847A (en) * | 1994-03-09 | 1995-09-26 | Toyo Umpanki Co Ltd | Power transmission device for small-sized loading vehicle |
| JPH09100894A (en) * | 1995-10-09 | 1997-04-15 | Toyota Motor Corp | Torque convertor with lock up clutch |
| CN201027947Y (en) * | 2007-02-09 | 2008-02-27 | 长沙航空工业中南传动机械厂 | Shaft-lowering output type hydraulic transmission gearbox for tractor |
| CN201241945Y (en) * | 2008-05-01 | 2009-05-20 | 常连生 | Speed variator for small-sized engineering machinery |
| CN102261451A (en) * | 2011-05-12 | 2011-11-30 | 安徽合力股份有限公司 | Hydrodynamic transmission for 2-3.5t hydraulic fork truck with pump mechanism |
| KR101150703B1 (en) * | 2011-09-22 | 2012-06-08 | 현대티앤에이(주) | Power train having touque convertor for forklift and construction vehicle |
| CN102758900A (en) * | 2012-07-24 | 2012-10-31 | 安徽合力股份有限公司 | Hydrodynamic transmission used for hydrodynamic forklift and provided with pump mechanism |
| KR101468564B1 (en) * | 2014-07-29 | 2014-12-04 | (주)엠에스정밀 | Driving device for industrial vehicle |
| CN109296725A (en) * | 2018-11-22 | 2019-02-01 | 浙江金道科技股份有限公司 | Small tonnage fork car double-velocity transmission |
| KR101963837B1 (en) * | 2017-12-19 | 2019-07-31 | 금아파워텍주식회사 | Hydraulic Hybrid Transmission with Hydraulic Motor and Torque Converter in Transmission |
| CN210656011U (en) * | 2019-09-04 | 2020-06-02 | 采埃孚合力传动技术(合肥)有限公司 | Fork truck hydraulic transmission case of two separation and reunion controls |
| CN211770092U (en) * | 2019-09-05 | 2020-10-27 | 采埃孚合力传动技术(合肥)有限公司 | Hydraulic control system for forklift gearbox |
| CN211901492U (en) * | 2019-12-30 | 2020-11-10 | 浙江金道科技股份有限公司 | Gearbox and filter mounting structure thereof |
| CN113324006A (en) * | 2021-06-24 | 2021-08-31 | 陕西法士特齿轮有限责任公司 | Hydraulic torque converter assembly |
-
2021
- 2021-12-22 CN CN202111577273.9A patent/CN114278713A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07246847A (en) * | 1994-03-09 | 1995-09-26 | Toyo Umpanki Co Ltd | Power transmission device for small-sized loading vehicle |
| JPH09100894A (en) * | 1995-10-09 | 1997-04-15 | Toyota Motor Corp | Torque convertor with lock up clutch |
| CN201027947Y (en) * | 2007-02-09 | 2008-02-27 | 长沙航空工业中南传动机械厂 | Shaft-lowering output type hydraulic transmission gearbox for tractor |
| CN201241945Y (en) * | 2008-05-01 | 2009-05-20 | 常连生 | Speed variator for small-sized engineering machinery |
| CN102261451A (en) * | 2011-05-12 | 2011-11-30 | 安徽合力股份有限公司 | Hydrodynamic transmission for 2-3.5t hydraulic fork truck with pump mechanism |
| KR101150703B1 (en) * | 2011-09-22 | 2012-06-08 | 현대티앤에이(주) | Power train having touque convertor for forklift and construction vehicle |
| CN102758900A (en) * | 2012-07-24 | 2012-10-31 | 安徽合力股份有限公司 | Hydrodynamic transmission used for hydrodynamic forklift and provided with pump mechanism |
| KR101468564B1 (en) * | 2014-07-29 | 2014-12-04 | (주)엠에스정밀 | Driving device for industrial vehicle |
| KR101963837B1 (en) * | 2017-12-19 | 2019-07-31 | 금아파워텍주식회사 | Hydraulic Hybrid Transmission with Hydraulic Motor and Torque Converter in Transmission |
| CN109296725A (en) * | 2018-11-22 | 2019-02-01 | 浙江金道科技股份有限公司 | Small tonnage fork car double-velocity transmission |
| CN210656011U (en) * | 2019-09-04 | 2020-06-02 | 采埃孚合力传动技术(合肥)有限公司 | Fork truck hydraulic transmission case of two separation and reunion controls |
| CN211770092U (en) * | 2019-09-05 | 2020-10-27 | 采埃孚合力传动技术(合肥)有限公司 | Hydraulic control system for forklift gearbox |
| CN211901492U (en) * | 2019-12-30 | 2020-11-10 | 浙江金道科技股份有限公司 | Gearbox and filter mounting structure thereof |
| CN113324006A (en) * | 2021-06-24 | 2021-08-31 | 陕西法士特齿轮有限责任公司 | Hydraulic torque converter assembly |
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