CN115821703A - Pavement milling machine - Google Patents
Pavement milling machine Download PDFInfo
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- CN115821703A CN115821703A CN202211716975.5A CN202211716975A CN115821703A CN 115821703 A CN115821703 A CN 115821703A CN 202211716975 A CN202211716975 A CN 202211716975A CN 115821703 A CN115821703 A CN 115821703A
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Abstract
The invention relates to a pavement milling machine, and belongs to the technical field of engineering machinery. The road milling machine comprises a power source, a working device and a speed change mechanism, wherein the speed change mechanism comprises a power input shaft, a first power output shaft for inputting power to a first transmission mechanism and a second power output shaft for inputting power to a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are in transmission connection with the working device; the driving shaft of the power source is connected with the power input shaft, the power input shaft is connected with the first power output shaft, the power input shaft is provided with a driving gear, the driving gear is connected with a driven gear in a meshed mode, the driven gear is arranged on the second power output shaft, the transmission ratios of the first power output shaft and the second power output shaft are different, the first power output shaft is connected with a first clutch, and the second power output shaft is connected with a second clutch. The invention ensures that the internal combustion engine stably works in the optimal rotating speed range so as to achieve the aim that the road milling machine can save energy as much as possible.
Description
Technical Field
The invention relates to a pavement milling machine, and belongs to the technical field of engineering machinery.
Background
The road milling machine is a special mechanical device for maintenance operation of highways and urban roads, and is mainly applied to milling and planing asphalt concrete surface layers of highways, airports, parking lots and the like, roughening cement road surfaces, milling and leveling staggered platforms of the surface layers and the like. One end of a transmission system of the pavement milling machine adopts a diesel internal combustion engine as a power source, and the other end adopts a milling wheel which can rotate around an axis as a working device.
The common transmission path is that a belt pulley is directly connected to an internal combustion engine to serve as a driving wheel, a clutch is arranged between the driving wheel and the internal combustion engine to control on and off of torque transmission, but in actual work, because construction media have large differences, different milling wheel rotating speeds are required, and the input rotating speed of the milling wheel must be adjusted by changing the rotating speed of the internal combustion engine in the conventional transmission mode, so that the internal combustion engine always works in a non-economic rotating speed area, and energy waste is caused.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a pavement milling machine to solve the technical problem that the energy is wasted because the input rotating speed of a working device can be adjusted only by changing the rotating speed of a power source in the related art.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
the invention provides a pavement milling machine, which comprises a power source and a working device, wherein a speed change mechanism is arranged between the power source and the working device, the speed change mechanism comprises a power input shaft, a first power output shaft for inputting power to a first transmission mechanism and a second power output shaft for inputting power to a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are in transmission connection with the working device;
the driving shaft of the power source is connected with the power input shaft, the power input shaft is connected with the first power output shaft, the power input shaft is provided with a driving gear, the driving gear is connected with a driven gear in a meshed mode, the driven gear is arranged on the second power output shaft, the transmission ratios of the first power output shaft and the second power output shaft are different, the first power output shaft is connected with a first clutch, the second power output shaft is connected with a second clutch, and when the clutch is in work, one of the first clutch and the second clutch is selected to be combined.
Furthermore, the driving gear is also meshed with a first hydraulic pump driving gear and a second hydraulic pump driving gear, the first hydraulic pump driving gear is in transmission connection with two first hydraulic pumps, and the second hydraulic pump driving gear is in transmission connection with two second hydraulic pumps.
Further, a driving shaft of the power source is connected with a power input shaft of the speed change mechanism through an elastic coupling.
Furthermore, the first transmission mechanism and the second transmission mechanism are in transmission connection with a planetary gear reduction mechanism, and the planetary gear reduction mechanism is in transmission connection with the working device.
Further, the first transmission mechanism and the second transmission mechanism both adopt a belt transmission mechanism or a chain transmission mechanism.
Further, the transmission ratios of the first transmission mechanism and the second transmission mechanism are different.
Furthermore, tensioning mechanisms are arranged on the first transmission mechanism and the second transmission mechanism.
Further, a brake mechanism is installed in a torque transmission path from a power input shaft of the speed change mechanism to the working device.
Further, the axis of the power source is parallel to the axis of the working device.
The hydraulic power generation device is characterized by further comprising a rack, wherein a machine room and a travelling mechanism are installed on the rack, an operation position is installed in the machine room, and a hydraulic motor and a hydraulic oil cylinder are installed on the travelling mechanism.
Compared with the prior art, the invention has the following beneficial effects:
the invention ensures that the power source stably works in the optimal rotating speed range by arranging the speed change mechanism, so that the road milling machine can save energy as much as possible.
Drawings
Fig. 1 is a schematic structural view of a road milling machine provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a transmission system provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic drive diagram of a variator provided by an embodiment of the invention;
in the figure: 1: a power source; 2: a working device; 3: a speed change mechanism; 4: a power input shaft; 5: a first transmission mechanism; 6: a first power take-off shaft; 7: a second transmission mechanism; 8: a second power take-off shaft; 9: a driving gear; 10: a driven gear; 11: a first clutch; 12: a second clutch; 13: a first hydraulic pump drive gear; 14: a second hydraulic pump drive gear; 15: a first hydraulic pump; 16: a second hydraulic pump; 17: an elastic coupling; 18: a planetary gear reduction mechanism; 19: a frame; 20: a nacelle; 21: a traveling mechanism; 22: an operation bit.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1 to 3, the present embodiment provides a road milling machine, which includes a power source 1 and a working device 2, wherein the power source 1 can drive the working device 2 to rotate to mill a road surface. A speed change mechanism 3 is arranged between the power source 1 and the working device 2 to transmit torque, and the speed change mechanism 3 can change the rotating speed and the torque from the power source 1, so that the purpose that the power source 1 stably works at an economic rotating speed to reduce energy consumption is achieved.
In the present embodiment, the speed change mechanism 3 includes a power input shaft 4, a first power output shaft 6 for inputting power to a first transmission mechanism 5, and a second power output shaft 8 for inputting power to a second transmission mechanism 7, and the first transmission mechanism 5 and the second transmission mechanism 7 are both in transmission connection with the working device 2.
In this embodiment, the driving shaft of the power source 1 is connected to the power input shaft 4, the power input shaft 4 is connected to the first power output shaft 6, the power input shaft 4 is provided with a driving gear 9, the driving gear 9 is engaged with a driven gear 10, the driven gear 10 is installed on the second power output shaft 8, the first power output shaft 6 is connected to a first clutch 11, and the second power output shaft 8 is connected to a second clutch 12.
Specifically, the connection or disconnection between the power input shaft 4 and the first power output shaft 6 is changed by the connection or disconnection of the first clutch 11, the route is a first transmission path, and power is directly transmitted from the power source 1 to the first power output shaft 6 due to the transition without a transmission member in the middle, so that the efficiency is highest.
The second power transmission path of the speed change mechanism 3 is that the power input shaft 4 firstly changes the rotation speed through a gear pair composed of a driving gear 9 and a driven gear 10 and simultaneously transmits the power to the second power output shaft 8, and the connection or disconnection of the second power transmission path is switched by controlling the connection or disconnection of the second clutch 12.
A group of gear pairs are added between the power source 1 and the second power output shaft 8, the efficiency is reduced, the influence is small, the efficiency is negligible compared with the efficiency increased when the power source 1 works at the economic rotating speed, and the energy consumption can be still effectively reduced.
In the present embodiment, the first power output shaft 6 and the second power output shaft 8 do not output power at the same time, that is, when the working device 2 is operated, only one of the first clutch 11 and the second clutch 12 can be optionally engaged.
Specifically, when the first transmission path of the transmission mechanism is operated, the first clutch 11 on the first transmission path is engaged, the second clutch 12 is disengaged, and the power input shaft 4 and the first power output shaft 6 of the transmission mechanism 3 are connected in a torque-transmitting manner so as to be rotated together at the same rotational speed.
When the second power transmission path is operated, the second clutch 12 on the second power transmission path is engaged and the first clutch 11 is disengaged, and at this time, the power input shaft 4 of the speed change mechanism 3 is connected to the second power output shaft 8 via the drive gear 9 and the driven gear 10 in a torque transmitting manner so as to be rotated together at different rotational speeds.
When the working device 2 is in different working conditions, the power source 1 is ensured to work at a stable economic rotating speed, and the energy consumption and pollution are reduced.
In the present embodiment, the first power take-off shaft 6 and the second power take-off shaft 8 have different gear ratios.
Specifically, the transmission ratio of the first power output shaft 6 is 1, and the power provided by the power source 1 is not transmitted through any gear in the speed change mechanism 3, but is directly output to the first power output shaft 6 through the power input shaft 4 of the speed change mechanism 3.
The transmission ratio of the second power take-off shaft 8 is not equal to 1,
the transmission ratio of the first power output shaft 6 and the second power output shaft 8 can be adjusted by changing the number of teeth, and the number of teeth of the driven gear 10 is greater than that of the driving gear 9.
In the present embodiment, the driving gear 9 is further engaged with a first hydraulic pump driving gear 13 and a second hydraulic pump driving gear 14, the first hydraulic pump driving gear 13 is drivingly connected with two first hydraulic pumps 15, and the second hydraulic pump driving gear 14 is drivingly connected with two second hydraulic pumps 16.
Specifically, the driving gear 9 is used for driving the two first hydraulic pumps 15 and the two second hydraulic pumps 16 to rotate, the engagement and disengagement of the first clutch 11 and the second clutch 12 are controlled by hydraulic pressure, and the two first hydraulic pumps 15 and the two second hydraulic pumps 16 can generate hydraulic pressure required by the operation of the speed change structure 3 through the driving of the power source 1.
In the present embodiment, the drive shaft of the power source 1 and the power input shaft 4 of the speed change mechanism 3 are connected by an elastic coupling 17.
Specifically, the power source 1 and the speed change mechanism 3 can be transited by the elastic coupling 17, so that the impact load of a working medium to the power source 1 during working can be reduced while power is transmitted, and the reliability of the power source 1 is improved.
In the present embodiment, the first transmission mechanism 5 and the second transmission mechanism 7 are both in transmission connection with a planetary gear reduction mechanism 18, and the planetary gear reduction mechanism 18 is in transmission connection with the working device 2.
Specifically, the planetary gear reduction mechanism 18 is configured to reduce the input rotation speed of the working device 2 and increase the input torque.
In the present embodiment, the first transmission mechanism 5 and the second transmission mechanism 7 both adopt a belt transmission mechanism or a chain transmission mechanism.
In this embodiment, the first transmission mechanism 5 and the second transmission mechanism 7 are both provided with a tensioning mechanism, and the tensioning mechanism is used for providing a tensioning force for the first transmission mechanism 5 and the second transmission mechanism 7.
If a belt transmission mechanism is adopted, the tensioning mechanism can ensure that the belt has enough wrap angle and power transmission capacity; if a chain transmission mechanism is adopted, the tensioning mechanism can prevent poor meshing.
Specifically, a first driving wheel is mounted on a first power output shaft 6 of the speed change mechanism 3, a second driving wheel is mounted on a second power output shaft 8, a driven wheel is mounted on the planetary gear reduction mechanism 18, a first belt or a first chain is connected between the first driving wheel and the driven wheel, and a second belt or a second chain is connected between the second driving wheel and the driven wheel.
In the present embodiment, the gear ratios of the first gear mechanism 5 and the second gear mechanism 7 are different.
Specifically, the diameters of the first driving wheel of the first transmission mechanism 5 and the second driving wheel of the second transmission mechanism 7 are different, so that the transmission ratio can be further changed according to requirements.
In the present embodiment, a brake mechanism is installed in a torque transmission path from the power input shaft 4 of the transmission mechanism 3 to the working device 2.
In particular, the working device 2 can be stopped by a braking device when the torque transmission path is interrupted, in order to avoid a reverse transmission of drag torque.
In this embodiment, the road milling machine further includes a frame 19, a cabin 20 and a traveling mechanism 21 are mounted on the frame 19, an operation position 22 is mounted in the cabin 20, and a hydraulic motor and a hydraulic cylinder are mounted on the traveling mechanism 21.
Specifically, the whole machine runs on a road surface needing to work, the power source 1 adopts an internal combustion engine and is arranged in the engine room 20 to provide power for the whole machine, the working device 2 rotates around the axis I to mill the road surface, the walking direction of the whole machine is vertical to the axis of the working device 2 during work, and the axis of the power source 1 and the axis of the working device 2 are arranged in parallel to ensure the stability of power transmission.
The two first hydraulic pumps 15 and the two second hydraulic pumps 16 are used for supplying power to the hydraulic motors to drive the whole machine to run, and supplying power to the hydraulic cylinders to adjust the milling depth of the whole machine, and the whole machine can be controlled to work by an operator at an operation position 22.
In the present embodiment, even if one of the torque transmission paths is damaged, the working device 2 can be connected to the power source 1 by the other torque transmission path to continue operation, and at this time, although the rotation speed of the working device 2 may not be optimal for the current working condition, the present embodiment can ensure that the working device 2 can still be driven to continue operation under most conditions, compared with the prior art, the reliability is greatly improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A pavement milling machine is characterized by comprising a power source (1) and a working device (2), wherein a speed change mechanism (3) is arranged between the power source (1) and the working device (2), the speed change mechanism (3) comprises a power input shaft (4), a first power output shaft (6) for inputting power to a first transmission mechanism (5) and a second power output shaft (8) for inputting power to a second transmission mechanism (7), and the first transmission mechanism (5) and the second transmission mechanism (7) are in transmission connection with the working device (2);
the driving shaft of the power source (1) is connected with the power input shaft (4), the power input shaft (4) is connected with the first power output shaft (6), a driving gear (9) is installed on the power input shaft (4), the driving gear (9) is meshed with a driven gear (10), the driven gear (10) is installed on the second power output shaft (8), the transmission ratios of the first power output shaft (6) and the second power output shaft (8) are different, a first clutch (11) is connected onto the first power output shaft (6), a second clutch (12) is connected onto the second power output shaft (8), and during work, one of the first clutch (11) and the second clutch (12) is selected to be combined.
2. The road milling machine as claimed in claim 1, characterized in that the drive gear (9) is also in meshing connection with a first hydraulic pump drive gear (13) and a second hydraulic pump drive gear (14), the first hydraulic pump drive gear (13) being in driving connection with two first hydraulic pumps (15), the second hydraulic pump drive gear (14) being in driving connection with two second hydraulic pumps (16).
3. The road milling machine according to claim 1, characterized in that the connection between the drive shaft of the power source (1) and the power input shaft (4) of the gear change mechanism (3) is via an elastic coupling (17).
4. The road milling machine according to claim 1, characterized in that the first transmission (5) and the second transmission (7) are each in transmission connection with a planetary gear reduction (18), the planetary gear reduction (18) being in transmission connection with the working device (2).
5. The road milling machine as claimed in claim 1, characterized in that the first transmission (5) and the second transmission (7) each employ a belt transmission or a chain transmission.
6. Road milling machine according to claim 5, characterised in that the transmission ratio of the first transmission (5) and the second transmission (7) is different.
7. The road milling machine as claimed in claim 5, characterized in that a tensioning mechanism is provided on both the first transmission mechanism (5) and the second transmission mechanism (7).
8. The road milling machine as claimed in claim 1, characterized in that a braking mechanism is installed in the torque transmission path of the power input shaft (4) of the gear change mechanism (3) to the working device (2).
9. The road milling machine as claimed in claim 1, characterised in that the power source (1) is arranged with its axis parallel to the axis of the working device (2).
10. The road milling machine as claimed in claim 1, further comprising a machine frame (19), wherein a cabin (20) and a travelling mechanism (21) are mounted on the machine frame (19), an operation position (22) is mounted in the cabin (20), and a hydraulic motor and a hydraulic oil cylinder are mounted on the travelling mechanism (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211716975.5A CN115821703A (en) | 2022-12-30 | 2022-12-30 | Pavement milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211716975.5A CN115821703A (en) | 2022-12-30 | 2022-12-30 | Pavement milling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115821703A true CN115821703A (en) | 2023-03-21 |
Family
ID=85519510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211716975.5A Pending CN115821703A (en) | 2022-12-30 | 2022-12-30 | Pavement milling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115821703A (en) |
-
2022
- 2022-12-30 CN CN202211716975.5A patent/CN115821703A/en active Pending
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