CN210106513U - Planetary gearbox and engineering vehicle - Google Patents
Planetary gearbox and engineering vehicle Download PDFInfo
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- CN210106513U CN210106513U CN201920921711.0U CN201920921711U CN210106513U CN 210106513 U CN210106513 U CN 210106513U CN 201920921711 U CN201920921711 U CN 201920921711U CN 210106513 U CN210106513 U CN 210106513U
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Abstract
The utility model discloses a planetary gearbox and an engineering vehicle, which comprises a hydraulic torque converter and a gearbox output gear, wherein the hydraulic torque converter drives the gearbox output gear to rotate to output torque through a transmission mechanism; the hydraulic torque converter is provided with two output ends which respectively drive a first gear and a second gear, the transmission mechanism is provided with a transmission assembly, a third gear and a fourth gear, the first gear and the third gear are in matched transmission, the second gear and the fourth gear are in matched transmission, the third gear drives an output gear of the gearbox through the transmission assembly, and the fourth gear drives the third gear intermittently through a clutch; the wet clutch is adopted to realize that the first-stage turbine intermittently drives the second-stage turbine, and the working state of the first-stage turbine and the working state of the second-stage turbine are controlled from the outside, so that the switching between heavy load and light load is realized, the corresponding speed of the switching between the heavy load and the light load is improved, and the reliability is higher.
Description
Technical Field
The application relates to the field of vehicle transmissions, in particular to a planetary gearbox and an engineering vehicle.
Background
The planetary gearbox framework matched with the single-stage two-phase four-element hydraulic torque converter adjusts the working states of the first-stage turbine and the second-stage turbine in an overrunning clutch mode, namely the first-stage turbine and the second-stage turbine output power simultaneously through the overrunning clutch when the load is increased; when the load is reduced, the first-stage turbine idles through the overrunning clutch, and the second-stage turbine provides power independently, so that the aim of saving energy is fulfilled.
The inventor finds that the main defects of the overrunning clutch are poor reliability, high failure rate, difficult repair, assembly replacement, and high use and maintenance cost; the isolation ring overrunning clutch has the main defects that the isolation ring integrally controls all the rollers, and the rollers are difficult to realize synchronous action and recovery in actual work, so that the rollers are abraded and dislocated, and the overrunning clutch is damaged; although a single return spring is arranged in the pin ejection type overrunning clutch, the spring still has the fault that the spring cannot be recovered in time, the spring force is small, and the roller is difficult to return, so that the function is lost; the plate spring overrunning clutch has high processing difficulty and high cost, stress is easy to break at the folding position of the plate spring, so that functional failure is caused, the existing overrunning clutch is controlled mechanically, real-time control is difficult to realize, and the response flexibility and the activity are poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the defect that prior art exists, provide a planetary gearbox and engineering vehicle, realize one-level turbine intermittent type formula drive second grade turbine through adopting wet clutch, from the external operating condition who participates in control one-level turbine and second grade turbine to realize the switching of heavy load and underloading, improved the corresponding speed that the heavy load switched with underloading, the reliability is higher.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the planetary gearbox comprises a hydraulic torque converter and a gearbox output gear, wherein the hydraulic torque converter drives the gearbox output gear to rotate through a transmission mechanism to output torque; the hydraulic torque converter is provided with two output ends which drive a first gear and a second gear respectively, the transmission mechanism is provided with a transmission assembly, a third gear and a fourth gear, the first gear and the third gear are in matched transmission, the second gear and the fourth gear are in matched transmission, the third gear drives a gearbox output gear through the transmission assembly, and the fourth gear drives the third gear intermittently through a clutch.
Further, the third gear and the fourth gear are coaxially mounted, and a certain gap is reserved between the third gear and the fourth gear and used for mounting a clutch.
Furthermore, the third gear and the fourth gear are both installed on an input shaft of the transmission assembly, the third gear is in key connection and matched with the driving transmission assembly, and the fourth gear is installed on the input shaft of the transmission assembly through a bearing.
Furthermore, one side of the third gear, which is close to the fourth gear, is provided with a first connecting piece, one side of the fourth gear, which is close to the third gear, is provided with a second connecting piece, friction plates and steel sheets of the clutch are respectively installed on the first connecting piece and the second connecting piece, and the friction plates are used for holding the steel sheets tightly under the action of pressure.
Further, the clutch is a wet clutch.
Preferably, the wet clutch comprises a plurality of friction plates which are coaxially mounted, a steel sheet is correspondingly matched between every two adjacent friction plates, the friction plates are all connected with the third gear, the steel sheets are all connected with the fourth gear, and the friction plates are used for transmitting the torque of the fourth steel sheet to the third gear through the steel sheets.
Furthermore, wet clutch still is equipped with clamping mechanism and handle, clamping mechanism installs the both sides at the friction disc, and the drive friction disc is held tightly or is released the steel sheet, the handle is used for controlling clamping mechanism's clamp or release.
Further, clamping mechanism includes hydro-cylinder and fixed plate, hydro-cylinder and fixed plate set up the both sides at the friction disc respectively, the hydro-cylinder is used for pressing from both sides tight steel sheet through flexible control friction disc intermittent type nature.
The utility model also provides an engineering vehicle, including foretell planet gearbox.
Furthermore, a gearbox output gear of the planetary transmission is connected with wheels, the clutch is provided with a control switch, and the control switch is installed in the cab.
Compared with the prior art, the utility model has the advantages and positive effect be:
(1) the wet clutch is adopted to realize the mode switching of heavy load and light load, the working state of the two-stage turbine of the hydraulic torque converter is effectively controlled, the operation flexibility is increased, the original overrunning clutch is replaced, and the reliability of the gearbox is improved;
(2) the wet clutch structure is adopted as a light-load and heavy-load clutch, so that the clutch is more suitable for severe working environments, is more widely applied and improves the convenience of maintenance;
(3) when the clutch works under heavy load, the traditional overrunning clutch generates heat seriously, elements are easy to lose transmission, while the wet clutch adopts oil to cool a friction surface, and heat generated by friction in the process of jointing a friction plate and a steel sheet can be taken away by the cooling oil at any time, so that the temperature of the friction surface is effectively controlled, the abrasion of the friction surface is reduced, and the effective transmission of driving torque is ensured;
(4) the wet clutch is driven by hydraulic pressure, has quick action response and can switch heavy load and light load of the gearbox in time.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of the wheel train structure of the present invention during heavy load;
fig. 2 is a schematic view of the wheel train structure during light load of the present invention.
Wherein: 1. torque converter, 2, first gear, 3, second gear, 4, third gear, 5, clutch, 6, fourth gear, 7, gearbox output gear, 8, transmission assembly.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "upper", "lower", "left" and "right" in the present application, if any, merely indicate correspondence with the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the present invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
The terms "mounted", "connected" and "fixed" in the present invention should be understood in a broad sense, for example, they may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As introduced in the background art, the main disadvantage of the overrunning clutch of the isolating ring in the prior art is that the isolating ring integrally controls all the rollers, and the rollers are difficult to realize synchronous action and recovery in actual work, so that the rollers are worn and dislocated, and the overrunning clutch is damaged; although a single return spring is arranged in the pin ejection type overrunning clutch, the spring still has the fault that the spring cannot be recovered in time, the spring force is small, and the roller is difficult to return, so that the function is lost; the plate spring overrunning clutch has high processing difficulty and high cost, stress at the folding position of the plate spring is easy to break, so that functional failure is caused, the existing overrunning clutch is controlled mechanically, real-time control is difficult to realize, and the response flexibility and the activity are poor; the application provides a planetary gearbox and an engineering vehicle for solving the technical problems.
Example 1
In a typical embodiment of the present application, as shown in fig. 1 and 2, a planetary transmission adapted for use in a work vehicle is proposed.
The hydraulic torque converter comprises a hydraulic torque converter 1 and a transmission case output gear 7, wherein the hydraulic torque converter drives the transmission case output gear to rotate through a transmission mechanism to output torque; the hydraulic torque converter is provided with two output ends which drive a first gear 2 and a second gear 3 respectively, the transmission mechanism is provided with a transmission component 8, a third gear 4 and a fourth gear 6, the first gear and the third gear are in matched transmission, the second gear and the fourth gear are in matched transmission, the third gear drives a gearbox output gear through the transmission component, and the fourth gear drives the third gear intermittently through a clutch 5.
It can be understood that the above-mentioned torque converter is a torque converter commonly used in the existing vehicle speed changing system, which is a non-rigid torque converter using liquid as a working medium, and is one of the forms of hydraulic transmission, the pump impeller transmits the mechanical energy of the input shaft to the liquid, and the liquid pushes the turbine to rotate, and transmits the energy to the output shaft;
in the embodiment, a single-stage two-phase four-element hydraulic torque converter is adopted, and the single-stage two-phase four-element hydraulic torque converter is provided with a first-stage turbine, a second-stage turbine and two corresponding output gears, so that the whole output of one hydraulic torque converter is divided into two parts, and the purpose of two-stage operation is achieved.
The first gear is a two-stage turbine output gear of the hydraulic torque converter, and the second gear is a one-stage turbine output gear of the hydraulic torque converter; the third gear is a transmission mechanism input gear, and the fourth gear is a heavy-load input gear of the transmission mechanism; the transmission assembly is a conventional transmission gear train assembly in existing transmissions and is not the focus of the present application and therefore will not be described in detail.
It should be noted that the clutch mentioned above is a clutch in a broad sense, that is, only the fourth gear can intermittently output torque to the third gear in a controllable manner, and the form and structure of the clutch are not limited; the third gear is used as an intermediate piece, the fourth gear applies the output force of the first-stage turbine of the hydraulic torque converter to the third gear, so that the first-stage turbine output and the second-stage turbine output of the hydraulic edge distance device are all transmitted to the output gear of the gearbox through the transmission assembly, and the switching between light load and heavy load is completed.
Further, the third gear and the fourth gear are coaxially mounted, and a certain gap is reserved between the third gear and the fourth gear and used for mounting a clutch;
the third gear and the fourth gear are both arranged on an input shaft of the transmission assembly, the third gear is in key connection and matched with the drive transmission assembly, and the fourth gear is arranged on the input shaft of the transmission assembly through a bearing;
one side that the third gear is close to the fourth gear is equipped with first connecting piece, one side that the fourth gear is close to the third gear is equipped with the second connecting piece, the friction disc and the steel sheet of clutch are installed respectively on first connecting piece and second connecting piece, the friction disc is used for holding the steel sheet tightly under the pressure effect.
It should be noted that, since the different types of clutches are different in size and shape, the size of the gap between the third gear and the fourth gear is adjusted by the installed clutch.
The third gear and the fourth gear are in the coaxial position, the torque can be jointly output through the controllable intermittent transmission torque of the clutch, the working state of the two-stage turbine of the hydraulic torque converter can be effectively controlled, the operation flexibility is improved, the original overrunning clutch is replaced, and the reliability of the gearbox is improved.
Further, the clutch is a wet clutch; the wet clutch comprises a plurality of friction plates which are coaxially arranged, a steel sheet is correspondingly matched between every two adjacent friction plates, the friction plates are connected with a third gear, the steel sheets are connected with a fourth gear, and the friction plates are used for transmitting the torque of the fourth steel sheet to the third gear through the steel sheets; the wet clutch is also provided with a clamping mechanism and a handle, the clamping mechanism is arranged on two sides of the friction plate and drives the friction plate to tightly hold or release the steel sheet, and the handle is used for controlling the clamping or releasing of the clamping mechanism; the clamping mechanism comprises an oil cylinder and a fixing plate, the oil cylinder and the fixing plate are respectively arranged on two sides of the friction plate, and the oil cylinder is used for intermittently clamping the steel sheet through the telescopic control friction plate.
Of course, it can be understood that the conventional overrunning clutch is precise in transmission and difficult to adapt to a severe working environment, and particularly in the field of engineering vehicles, the conventional overrunning clutch often works on construction sites filled with dust and gravels;
on the other hand, engineering vehicles often need to carry out heavy-load work, for example, when a dump truck transports a large amount of gravels, the traditional overrunning clutch generates heat seriously and elements are easy to lose transmission during the heavy-load work, while the wet clutch adopts oil liquid to cool a friction surface, and heat generated by friction in the process of jointing a friction plate and a steel sheet can be taken away by cooling oil liquid at any time, so that the temperature of the friction surface is effectively controlled, the abrasion of the friction surface is reduced, and the effective transmission of driving torque is ensured; and the wet clutch is driven by hydraulic pressure, so that the action response is quick, and the heavy load and the light load of the gearbox can be switched in time.
The following explains the switching process of light load and heavy load with reference to fig. 1 and 2:
two forward gears are arranged on the planetary gearbox and respectively correspond to a light load state and a heavy load state, when the planetary gearbox is in a forward 1-gear light load mode, the secondary turbine outputs power to the third gear, the clutch does not act, the fourth gear and the third gear do not interfere with each other, and the primary turbine idles and does not load; the second-stage turbine is driven by the first gear and the third gear, so that the transmission assembly is driven to drive the output gear of the gearbox to rotate.
When the forward 2-gear heavy-load mode is adopted, the clutch associates the fourth gear with the third gear, the input shaft of the transmission assembly is driven to rotate at the same angular speed, the first-stage turbine and the second-stage turbine output power together, so that the first gear and the second gear are driven to output, and the transmission assembly is driven to drive the output gear of the gearbox to rotate by matching with the third gear and the fourth gear.
Example 2
In another exemplary embodiment of the present invention, there is also provided an engineering vehicle, wherein the planetary transmission as described in embodiment 1 is installed on the engineering vehicle.
The output gear of the gearbox of the planetary transmission is connected with wheels, the clutch is provided with a control switch, and the control switch is installed in the cab.
When the vehicle needs heavy load, the control switch is turned on, and the clutch connects the third gear and the fourth gear for common transmission, so that the driving force under the heavy load condition is output; when the vehicle needs light load, the control switch is closed, the clutch separates the third gear from the fourth gear and drives the third gear only, and therefore driving force under the condition of light load is output.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A planetary gearbox is characterized by comprising a hydraulic torque converter and a gearbox output gear, wherein the hydraulic torque converter drives the gearbox output gear to rotate through a transmission mechanism to output torque; the hydraulic torque converter is provided with two output ends which drive a first gear and a second gear respectively, the transmission mechanism is provided with a transmission assembly, a third gear and a fourth gear, the first gear and the third gear are in matched transmission, the second gear and the fourth gear are in matched transmission, the third gear drives a gearbox output gear through the transmission assembly, and the fourth gear drives the third gear intermittently through a clutch.
2. The planetary transmission as in claim 1, wherein the third gear and the fourth gear are coaxially mounted with a gap therebetween for mounting a clutch.
3. The planetary transmission of claim 2, wherein the third gear and the fourth gear are each mounted on an input shaft of the transmission assembly, the third gear driving the transmission assembly in a keyed engagement, and the fourth gear being mounted on the input shaft of the transmission assembly by a bearing.
4. A planetary transmission as claimed in claim 3, wherein the third gear has a first connecting member on a side thereof adjacent the fourth gear and a second connecting member on a side thereof adjacent the third gear, and wherein friction plates and steel plates of the clutch are mounted on the first and second connecting members respectively, the friction plates being adapted to hold the steel plates under pressure.
5. The planetary transmission of claim 1, wherein the clutch is a wet clutch.
6. The planetary transmission as claimed in claim 5, wherein the wet clutch comprises a plurality of friction plates coaxially mounted, a steel plate is correspondingly fitted between adjacent friction plates, the friction plates are connected with the third gear, the steel plates are connected with the fourth gear, and the friction plates are used for transmitting the torque of the fourth steel plate to the third gear through the steel plates.
7. The planetary transmission as claimed in claim 6, wherein the wet clutch further comprises a clamping mechanism mounted on both sides of the friction plate for driving the friction plate to grip or release the steel plate, and a handle for controlling the clamping or releasing of the clamping mechanism.
8. The planetary transmission as claimed in claim 7, wherein the clamping mechanism comprises an oil cylinder and a fixing plate, the oil cylinder and the fixing plate are respectively provided on both sides of the friction plate, and the oil cylinder is used for intermittently clamping the steel plate by controlling the friction plate through expansion and contraction.
9. A working vehicle, characterized in that it comprises a planetary gearbox according to any of claims 1-8.
10. The work vehicle of claim 9, wherein the gearbox output gear of the planetary gearbox is connected to a wheel, and the clutch is provided with a control switch, and the control switch is installed in the cab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920921711.0U CN210106513U (en) | 2019-06-18 | 2019-06-18 | Planetary gearbox and engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920921711.0U CN210106513U (en) | 2019-06-18 | 2019-06-18 | Planetary gearbox and engineering vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210106513U true CN210106513U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920921711.0U Active CN210106513U (en) | 2019-06-18 | 2019-06-18 | Planetary gearbox and engineering vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN210106513U (en) |
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- 2019-06-18 CN CN201920921711.0U patent/CN210106513U/en active Active
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Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee after: Lovol Heavy Industry Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee before: LOVOL Engineering Machinery Group Co.,Ltd. |