Road roller gearbox capable of separately controlling gear shifting and reversing

Abstract

The utility model discloses a road roller gearbox capable of separately controlling gear shifting and reversing, which comprises an input shaft, an idler shaft assembly, a first intermediate transmission shaft, a second intermediate transmission shaft and an output shaft assembly which are arranged in parallel and are in transmission fit through a gear set; the pneumatic reversing device has the advantages that the structure is advanced and reasonable, the reliability is high, gear shifting and reversing can be controlled respectively, the pneumatic reversing device is suitable for road roller operation, pneumatic control is adopted for reversing, rapid and automatic reversing is achieved, and the pneumatic reversing device is convenient to operate, comfortable, light, convenient and short in time.

Description

Technical Field

[0001] The utility model relates to the technical field of gearbox equipment for road rollers, in particular to a gearbox for road rollers with gear shifting and direction reversing controlled separately. Background Art

[0002] At present, the mechanical gearbox of the engineering roller series in the prior art adopts the gear shifting operation mode of the automobile gearbox. Each gear shift requires two operation actions of gear selection and gear shifting. However, the operation characteristic of the roller is that the speed change is not allowed during driving, and the forward and reverse functions need to be used frequently. Therefore, this operation mode is not suitable for the use of the roller. The operation comfort is poor, the gear shifting time is long and laborious, and the labor intensity of the driver is increased. Therefore, a mechanical gearbox for the roller with separately controlled gear shifting and reversing is needed to solve the above problems. Utility Model Content

[0003] In order to solve the problem that the existing road roller gearbox adopts the gear shifting operation mode of the automobile gearbox in the above background technology, and each gear shift requires two operation actions of gear selection and gear shifting, a road roller gearbox with separate control of gear shifting and reversing is provided, which has an advanced and reasonable structure, high reliability, can realize separate control of gear shifting and reversing, and is suitable for the operation characteristics of the road roller. The reversing adopts pneumatic control to realize fast automatic reversing, and the operation is convenient, comfortable, light and short. The utility model provides the following technical solutions:

[0004] A road roller gearbox with separately controlled gear shifting and reversing comprises an input shaft, an idler shaft assembly, an intermediate transmission shaft one, an intermediate transmission shaft two and an output shaft assembly, wherein the input shaft, the idler shaft assembly, the intermediate transmission shaft one, the intermediate transmission shaft two and the output shaft assembly are arranged in parallel and matched through a gear set transmission; a reversing synchronizer assembly is arranged on the input shaft, and a first- and second-gear synchronizer assembly and a third-gear synchronizer are installed on the intermediate transmission shaft two.

[0005] Preferably, the idler shaft assembly is located between the input shaft and the intermediate transmission shaft, and the idler shaft assembly is meshed with gears on both the input shaft and the intermediate transmission shaft.

[0006] Preferably, the gearbox assembly includes a front housing and a rear housing, the front housing and the rear housing are connected together, the bearing cover is installed outside the bearing of the input shaft, an oil seal is installed in the bearing cover, the stopper of the clutch housing assembly is positioned by facing the outer cylindrical surface of the bearing cover, and the clutch housing assembly is fastened to the front housing of the gearbox.

[0007] Preferably, a rear flange is mounted at the rear end of the output shaft assembly, and a front flange is fixedly mounted at the front end of the output shaft assembly via splines.

[0008] Preferably, the gearbox of the road roller also includes a gearbox lubrication system, which consists of a gear oil pump, a lubrication spray oil pipe and a filter assembly. The gear oil pump is installed on the rear housing and is located on the same axis as the input shaft. The gear oil pump is connected to the input shaft through a key, and the gear oil pump is connected to the filter assembly located at the bottom of the gearbox through an oil pipe.

[0009] Preferably, the speed change mechanism assembly is mounted on the side of the front housing of the gearbox, parallel to the second intermediate transmission shaft.

[0010] Preferably, the pneumatic reversing assembly is installed on the upper part of the rear housing of the gearbox, located above the input shaft and parallel thereto, the pneumatic reversing assembly is provided with a reverse air source connector and a forward air source connector, a cylinder piston is installed inside the pneumatic reversing assembly, and it is fixedly connected to the reversing fork shaft by a locking nut, and a reversing fork is installed on the reversing fork shaft and fixed by a wave-mouth elastic pin.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model adopts the separate control of gearbox reversing and speed change, and there are three sets of synchronizers inside the gearbox. One set of synchronizers controls the direction, and controls the forward and backward movement of the vehicle through the reversing synchronizer assembly. Two sets of synchronizers control the gear position, and control the different walking speeds of the vehicle through the first and second gear synchronizer assemblies and the third gear synchronizer. The gearbox adopts a five-set parallel rotating shaft transmission structure, which can achieve the reduction of wheelbase while completing power transmission. The gearbox has a compact structure, short length, high strength, and a 3-forward and 3-reverse gear arrangement, which can fully meet the various working conditions of the roller. The reversing adopts pneumatic control to realize automatic switching between forward, middle and reverse, and the reversing operation is flexible and convenient. The forward and reverse movement of each gear is driven by the same set of gears, and the speed ratios of forward and reverse are exactly the same. The vehicle has better driving stability and can improve the construction quality. The gearbox is rigidly connected, there will be no additional loss, and the transmission efficiency can reach 97%. The full mechanical transmission of the power system is realized, which has advantages in transmission efficiency, climbing ability, fuel consumption and maintenance. It has the advantages of stronger power, simple structure, low manufacturing cost, low failure rate and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a planar structural diagram of the utility model;

[0014] Figure 2 This is a rear view of the utility model;

[0015] Figure 3 It is a schematic diagram of the installation structure of the pneumatic reversing assembly in the utility model.

[0016] In the above drawings, 1-clutch housing assembly, 2-bearing cover, 3-input shaft, 4-forward gear driving gear, 5-reversing synchronizer assembly, 6-reverse gear driving gear, 7-reversing fork, 8-reversing fork shaft, 9-lubricating spray oil pipe, 10-front housing, 11-rear housing, 12-reverse air source connector, 13-cylinder piston, 14-pneumatic reversing assembly, 15-forward air source connector, 16-gear oil pump, 17-idler shaft assembly, 18-intermediate transmission shaft 1, 19-first gear gear, 20-intermediate transmission shaft 2, 21-first and second gear synchronizer assembly, 22-second gear gear, 23-rear flange, 24-parking brake, 25-filter assembly, 26-output shaft assembly, 27-front flange, 28-third gear gear, 29-third gear synchronizer, 30-speed change mechanism assembly. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] like Figure 1-3 As shown, the roller gearbox provided by the utility model includes an input shaft 3, an idler shaft assembly 17, an intermediate transmission shaft 18, an intermediate transmission shaft 20 and an output shaft assembly 26. The input shaft 3, the idler shaft assembly 17, the intermediate transmission shaft 18, the intermediate transmission shaft 20 and the output shaft assembly 26 are arranged in parallel and matched through a gear set transmission. A five-group parallel rotating shaft transmission structure is adopted, all transmission gears are supported by rolling bearings, and the gears are constantly meshed with each other. All bearings and gears are forced to be lubricated, so as to achieve a reduced wheelbase while completing power transmission.

[0020] A reversing synchronizer assembly 5 is provided on the input shaft 3, and a first- and second-gear synchronizer assembly 21 and a third-gear synchronizer 29 are installed on the intermediate transmission second shaft 20 to control the vehicle forward and backward through the reversing synchronizer assembly 5, and control the different walking speeds of the vehicle through the first- and second-gear synchronizer assembly 21 and the third-gear synchronizer 29. There are three groups of synchronizers inside the gearbox, one group of which controls the direction, and two groups of synchronizers control the gear position, so as to realize the separate control of reversing and speed changing of the gearbox of the road roller.

[0021] The specific installation relationship of the three sets of synchronizers is as follows: the input shaft 3 is equipped with a forward gear 4 and a reverse gear 6, which are supported on the journal of the input shaft 3 through needle bearings, and a reversing synchronizer assembly 5 is provided between the forward gear 4 and the reverse gear 6, which is fixedly connected to the input shaft 3 with an involute spline. The intermediate transmission shaft 18 is located inside the gearbox and below the input shaft 3. There are three gears on the intermediate transmission shaft 18, which rotate as a whole, and the two ends are supported on the front housing 10 and the rear housing 11 through cylindrical roller bearings. The intermediate transmission shaft 20 is located below the intermediate transmission shaft 18, and its two ends are supported on the front housing 10 and the rear housing 11 through cylindrical roller bearings. A long meshing gear is formed on it, which meshes with the gear on the output shaft assembly 26. The intermediate transmission shaft 20 is equipped with a first gear gear 19 and a second gear gear 22. A first and second gear synchronizer assembly 21 is provided between the first gear gear 19 and the second gear gear 22. The intermediate transmission shaft 20 is also equipped with a third gear gear 28 and a third gear synchronizer 29. Each gear gear is supported on the journal of the intermediate transmission shaft 20 through a needle bearing. Each gear on the transmission shaft 2 is respectively meshed with each corresponding gear gear on the intermediate transmission shaft 18. The first and second gear synchronizer assembly 21 and the third gear synchronizer 29 are fixedly connected to the intermediate transmission shaft 20 by an involute spline.

[0022] The idler shaft assembly 17 is located between the input shaft 3 and the intermediate transmission shaft 18. Two gears are formed on the idler shaft assembly 17. The idler shaft assembly 17 is meshed with the gears on the input shaft 3 and the intermediate transmission shaft 18 at the same time. Both ends are supported on the front housing 10 and the rear housing 11 through ball bearings. The idler shaft assembly 17 is used to change the rotation direction of the passive gear to realize the reverse function of the gearbox.

[0023] The gearbox assembly includes a front housing 10 and a rear housing 11, which are connected together. The bearing cover 2 is installed outside the bearing of the input shaft 3. An oil seal is installed in the bearing cover 2. The stopper of the clutch housing assembly 1 is positioned by centering with the outer cylindrical surface of the bearing cover 2. The clutch housing assembly 1 is fastened to the front housing 10 of the gearbox. The input shaft 3 is located at the upper end of the gearbox. The front end of the input shaft 3 is supported in the bearing hole of the engine crankshaft. The rear end of the input shaft 3 is supported in the bearing holes of the front housing 10 and the rear housing 11 of the gearbox through a cylindrical roller bearing. The spline at the front end is inserted into the clutch driven disc hub, and the power of the engine is input into the gearbox through the control of the clutch.

[0024] The output shaft assembly 26 is located below the intermediate transmission second shaft 20. Both ends of the output shaft assembly 26 are supported on the front housing 10 and the rear housing 11 through tapered roller bearings. A rear flange 23 is fixedly mounted at the rear end of the output shaft assembly 26 through a spline. A parking brake 24 is bolted to the rear flange 23 for parking brake. A front flange 27 is fixedly mounted at the front end of the output shaft assembly 26 through a spline. The front flange 27 is connected to the transmission shaft of the roller through bolts to output power.

[0025] The lubrication system of the gearbox is composed of a gear oil pump 16, a lubrication spray oil pipe 9 and a filter assembly 25. The gear oil pump 16 is installed on the rear housing 11. The gear oil pump 16 and the input shaft 3 are located on the same axis. The gear oil pump 16 is connected to the input shaft 3 through a key. When the input shaft 3 rotates, the gear oil pump 16 is driven to work. The gear oil pump 16 is connected to the filter assembly 25 located at the bottom of the gearbox through an oil pipe, and the filtered lubricating oil is pumped into the lubricating spray oil pipe 9, and then the lubricating oil is sprayed to the bearings, gears and other parts that need lubrication through the oil nozzle on the lubricating spray oil pipe 9.

[0026] The speed change mechanism assembly 30 is installed on the side of the front housing 10 of the gearbox, parallel to the intermediate transmission second shaft 20. The driver can shift into the desired gear and select the gear by operating the speed change mechanism assembly 30 through the shift lever to change the driving speed of the roller to meet the needs of different road conditions and driving conditions.

[0027] The pneumatic reversing assembly 14 is installed on the upper part of the rear housing 11 of the gearbox, located above the input shaft 3 and parallel to it. The pneumatic reversing assembly 14 is provided with a reverse air source connector 12 and a forward air source connector 15, which are respectively connected to the vehicle-mounted air tank and controlled by the pneumatic control system. The pneumatic reversing assembly 14 is equipped with a cylinder piston 13, which is fixedly connected to the reversing fork shaft 8 through a locking nut. The reversing fork shaft 8 is equipped with a reversing fork 7, which is fixed by a wave elastic pin.

[0028] Working process of the utility model: when the roller is started, the engine and the clutch assembly transmit power to the input shaft 3 through the spline, and the input shaft 3 starts to rotate, driving the gear oil pump 16 to work and lubricate the bearings, gears and other parts in the gearbox. At this time, since the three sets of synchronizers are in neutral, all gears are in a static state, and only the input shaft 3 rotates. The driver operates the speed lever to select and shift gears according to the selected driving speed range and puts it in the required gear. At this time, the gears of the intermediate transmission shaft 18 and the intermediate transmission shaft 20 are connected and meshed. At this time, since the reversing synchronizer assembly 5 is still in the neutral position, all gears are still in a static state. After the driver confirms the driving direction, he releases the parking brake 24, steps on the clutch pedal, interrupts the power transmitted to the input shaft 3 by the engine, pushes down the forward switch, and the pneumatic control system is turned on. Open the forward air source channel, the compressed air in the air tank enters the right chamber of the pneumatic reversing assembly 14, pushes the cylinder piston 13 to move leftward, the cylinder piston 13 drives the reversing fork 7 to move leftward through the reversing fork shaft 8, pushes the synchronizer gear sleeve to engage in the forward gear, releases the clutch, and the power is transmitted to the forward driving gear 4 through the input shaft 3, and the roller drives forward to start compaction. When the roller drives to the end of the construction section, the driver steps on the clutch to interrupt the power transmitted to the gearbox by the engine, and presses the reverse switch at the same time. The press is reversed according to the above principle, engaged in the reverse gear, and the roller drives backward to start compaction. The pneumatic control system only allows one airway to be in a high-pressure working state, and the other airway is in a pressure-relief state. When the gearbox power output is not required, the pneumatic control system can make both independent airways in a pressure-relief state. At this time, the cylinder piston 13 returns to the middle position, that is, the neutral position of the gearbox, under the action of the springs at both ends.

[0029] According to the operating characteristics of the roller, in the construction section with the same driving speed, this gearbox only needs to operate the forward and reverse switches to complete the roller's forward and backward reciprocating operating characteristics.

Claims

1. A road roller gearbox with separate control of gear shifting and direction reversing, characterized in that: The invention comprises an input shaft (3), an idler shaft assembly (17), an intermediate transmission shaft (18), an intermediate transmission shaft (20) and an output shaft assembly (26); the input shaft (3), the idler shaft assembly (17), the intermediate transmission shaft (18), the intermediate transmission shaft (20) and the output shaft assembly (26) are arranged in parallel and are matched through a gear set; a reversing synchronizer assembly (5) is arranged on the input shaft (3), and a first- and second-gear synchronizer assembly (21) and a third-gear synchronizer (29) are arranged on the intermediate transmission shaft (20).

2. A roller gearbox with separate control of gear shifting and direction reversing according to claim 1, characterized in that: The idler shaft assembly (17) is located between the input shaft (3) and the intermediate transmission shaft (18), and the idler shaft assembly (17) is meshed with the gears on the input shaft (3) and the intermediate transmission shaft (18) at the same time.

3. A roller gearbox with separate control of gear shifting and direction reversing according to claim 1, characterized in that: The gearbox assembly comprises a front housing (10) and a rear housing (11), the front housing (10) and the rear housing (11) are connected together, a bearing cover (2) is installed outside the bearing of an input shaft (3), an oil seal is installed inside the bearing cover (2), a stopper of a clutch housing assembly (1) is positioned by being centered with an outer cylindrical surface of the bearing cover (2), and the clutch housing assembly (1) is fastened to the gearbox front housing (10).

4. A road roller gearbox with separate control of gear shifting and direction reversing according to claim 1, characterized in that: A rear flange (23) is arranged at the rear end of the output shaft assembly (26), and a front flange (27) is fixedly arranged at the front end of the output shaft assembly (26) via a spline.

5. A road roller gearbox with separate control of shifting and reversing according to claim 4, characterized in that: The gearbox of the road roller also includes a gearbox lubrication system, which is composed of a gear oil pump (16), a lubrication spray oil pipe (9) and a filter assembly (25). The gear oil pump (16) is installed on the rear housing (11) and is located on the same axis as the input shaft (3). The gear oil pump (16) is connected to the input shaft (3) through a key. The gear oil pump (16) is connected to the filter assembly (25) located at the bottom of the gearbox through an oil pipe.

6. A road roller gearbox with separate control of gear shifting and direction reversing according to claim 4, characterized in that: The speed change mechanism assembly (30) is mounted on the side of the front housing (10) of the gearbox and is parallel to the intermediate transmission second shaft (20).

7. A road roller gearbox with separate control of gear shifting and direction reversing according to claim 4, characterized in that: The pneumatic reversing assembly (14) is mounted on the upper part of the rear housing (11) of the gearbox, and is located above and parallel to the input shaft (3). The pneumatic reversing assembly (14) is provided with a reverse air source connector (12) and a forward air source connector (15). A cylinder piston (13) is arranged inside the pneumatic reversing assembly (14), and is fixedly connected to a reversing fork shaft (8) through a locking nut. A reversing fork (7) is arranged on the reversing fork shaft (8), and is fixed by a wave-mouth elastic pin.

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