Five-gear manual gear shifting gearbox assembly with power takeoff interface

Abstract

The utility model relates to the technical field of transmissions, in particular to a five-gear manual gear shifting gearbox assembly with a power takeoff interface. Comprising a front shell and a rear cover, an input shaft penetrates through the left side of the shell, a transmission shaft penetrates through the right side of the rear cover, an output shaft is connected between the input shaft and the transmission shaft, and a middle shaft is arranged below the output shaft in parallel; a power takeoff is arranged below the shell and connected with a driven gear of the intermediate shaft through a gear of the power takeoff. The whole shell structure is improved, the shell is divided into the front shell and the rear shell, a middle shaft type compact structure is achieved through three sections, so that the center distance is controlled to be 85 mm, the precision of manual five-gear shifting is improved by combining a high-hardness carburized gear, and the maximum input torque ranges from 280 NM to 310 NM; and the power takeoff is externally connected through the interface, so that the power on the intermediate shaft can be fully utilized, and the double requirements of driving and driving auxiliary equipment are met at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of transmission, specifically relates to a five gear manual gear shift transmission assembly with a power takeoff interface. BACKGROUND

[0002] The conventional transmission structure has limitations in gear shift precision, power utilization and function expansion. In terms of power utilization, it is difficult to reasonably distribute the power of the intermediate shaft, and it is impossible to simultaneously meet the needs of vehicle driving and driving auxiliary equipment. To solve these problems, existing improved patents such as the Chinese patent with the authorized announcement number CN210661228U disclose a multi-gear transmission with a power takeoff structure, which adjusts the power of the power takeoff through eight gear positions, realizing multi-gear power takeoff. However, this scheme still has deficiencies, the overall structure is not compact enough, occupies a large space, and is not conducive to vehicle space layout; the gear shift precision of some transmissions is insufficient, the gear shift is not smooth, and the driving experience is affected. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a five gear manual gear shift transmission assembly with a power takeoff interface.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A five gear manual gear shift transmission assembly with a power takeoff interface, comprising a front shell and a rear cover, an input shaft is arranged through the left side of the shell, a transmission shaft is arranged through the right side of the rear cover, an output shaft is connected between the input shaft and the transmission shaft, and an intermediate shaft is arranged in parallel below the output shaft; the intermediate shaft is connected to the input shaft through a constant mesh gear, and a plurality of gears are arranged on the output shaft; a gear shift mechanism is fixed to the upper side of the shell, and the gear shift mechanism is connected to the gears on the output shaft through a synchronizer; a driven gear is arranged on the intermediate shaft, the driven gear is matched with the gears on the output shaft, and the right end of the output shaft outputs torque to the transmission shaft; a power takeoff is arranged below the shell, and the power takeoff is connected to the driven gear of the intermediate shaft through a self-contained gear.

[0006] The technical scheme improves the whole shell structure, divides the shell into a front shell and a rear shell, and realizes a three-section intermediate shaft compact structure, so that the center distance is controlled to be 85mm, the precision of manual five-gear shifting is improved by combining with high-hardness carburized gears, the maximum input torque is 280~310NM, and the power on the intermediate shaft can be fully utilized by externally connecting a power take-off, and the double requirements of driving and driving auxiliary equipment are met. Specifically, after the power is output from the engine, the power is transmitted to the input shaft through the clutch; the input shaft penetrates the left side of the shell, and the power of the engine is introduced into the gearbox; the intermediate shaft is connected with the input shaft through the constant mesh gear, and the intermediate shaft is driven to rotate synchronously through the constant mesh gear; the passive gear is arranged on the intermediate shaft and matched with the gear on the output shaft; when the intermediate shaft rotates, the passive gear drives the gear meshing with the passive gear on the output shaft to rotate, so that the output shaft obtains power; the right end of the output shaft outputs torque to the transmission shaft, and the transmission shaft transmits power to the driving wheel of the vehicle to realize the driving of the vehicle. In the shifting process, the synchronizer makes the gear on the output shaft and the passive gear on the intermediate shaft rotate at the same speed, and stable shifting is realized; for example, when shifting from a low gear to a high gear, the synchronizer is first separated from the gear of the low gear, and then meshed with the gear of the high gear, and the synchronizer adjusts the rotating speed of the gear to avoid shifting impact. The connection of the synchronizer and different gears is controlled by the shifting mechanism, the transmission ratio of the output shaft and the intermediate shaft is changed, and different gears are realized; for example, in the first gear, the synchronizer is connected with the gear corresponding to the first gear on the output shaft, the transmission ratio of the output shaft and the intermediate shaft is large, the vehicle obtains large torque, but the vehicle speed is low; in the fifth gear, the synchronizer is connected with the gear corresponding to the fifth gear on the output shaft, the transmission ratio is small, the vehicle obtains high speed, but the torque is relatively small. When power is required, the gear of the power take-off is meshed with the passive gear of the intermediate shaft, the power of the intermediate shaft is transmitted to the power take-off through the passive gear, and then the power take-off outputs power to the auxiliary equipment to be driven.

[0007] In addition, the five-gear manual gear shifting gearbox assembly with a power take-off interface according to the above-mentioned utility model can also have the following additional technical features:

[0008] According to an embodiment of the utility model, a reverse gear mechanism is arranged below the intermediate shaft, the reverse gear mechanism is connected with the intermediate shaft through gears, the intermediate shaft is connected with the output shaft through the passive gear, and the power is transmitted to the vehicle through the transmission shaft.

[0009] The power changed in direction by the reverse gear mechanism is transmitted to the output shaft through the intermediate shaft and the passive gear, and the power is output to the driving wheel of the vehicle through the transmission shaft, and the reverse motion is completed.

[0010] According to one embodiment of the utility model, a plurality of gears are arranged on the output shaft, and the plurality of gears correspond to five manual gears controlled by the gear shifting mechanism, wherein the manual gears correspond to first gear, second gear, third gear, fourth gear and fifth gear.

[0011] The transmission ratio between the output shaft and the intermediate shaft is changed through gear shifting operation; different transmission ratios correspond to different vehicle speeds and torque output characteristics: when the transmission ratio is large, the output shaft rotates at a low speed but has a large torque, which is suitable for vehicle starting and climbing; when the transmission ratio is small, the output shaft rotates at a high speed but has a small torque, which is suitable for vehicle high-speed cruising.

[0012] According to one embodiment of the utility model, the intermediate shaft is provided with five passive gears in cooperation with the output shaft, wherein the power take-off device is engaged with the second gear passive gear of the intermediate shaft.

[0013] In the technical solution, the second gear passive gear is selected as the power take-off point, which is based on the matching of the power output characteristics at this gear position and the working requirements of the auxiliary equipment; the transmission ratio of the second gear makes the speed and torque of the intermediate shaft at this gear position meet the requirements for normal operation of the auxiliary equipment, so that the auxiliary equipment cannot work normally due to excessively high speed or excessively small torque, and the transmission box and the auxiliary equipment cannot be damaged due to excessively low speed or excessively large torque. The auxiliary equipment driven by the power take-off device includes a hydraulic pump, a generator and the like.

[0014] According to one embodiment of the utility model, the constant mesh gear, the plurality of gears on the output shaft and the passive gears on the intermediate shaft are carburized gears, and the carburized gears are provided with a carburized layer on the surface.

[0015] The carburized gears and the carburized layer on the surface thereof are used to improve the wear resistance, fatigue resistance, contact strength and gluing resistance of the gears in the transmission box, so as to adapt to the complex and changeable working conditions of the transmission box.

[0016] According to one embodiment of the utility model, the housing and the rear cover are made of aluminum / iron material, and the transmission box adopts a compact intermediate shaft structure, the center distance between the intermediate shaft and the output shaft is 85 mm, and the maximum input torque that can be borne is 280-310 NM.

[0017] In the technical solution, the aluminum material has the characteristics of small density and light weight, and the use of aluminum material to manufacture part of the housing structure can effectively reduce the overall weight of the transmission box; the iron material has high strength and rigidity, and can bear a large force and torque, so that the iron material will not be deformed or damaged when bearing the maximum input torque of 280-310 NM. By setting the center distance between the intermediate shaft and the output shaft to 85 mm, the components of the transmission box can be reasonably arranged in a limited space, and the overall volume of the transmission box is reduced.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] Through improving whole shell structure, three segment type structure is adopted to realize middle axle type compact structure, so that the center distance of middle axle and output shaft can be accurately controlled at 85mm, high hardness carburizing gear is used in cooperation, the precision of manual five gear shifting is remarkably improved, the gearbox has powerful power bearing capacity, the maximum input torque can reach 280~310NM, through interface external power takeoff, the power on the middle axle can be efficiently utilized, the power requirement of vehicle normal driving is met, and the power for driving auxiliary equipment is also provided, so that dual function requirements of driving and driving auxiliary equipment are realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the sectional view of the utility model.

[0021] Fig. 2 It is the front view of the utility model.

[0022] Fig. 3 It is the side view of the utility model.

[0023] In the drawing: 1, input shaft;2, middle axle;3, shifting mechanism;4, synchronizer;5, output shaft;6, front shell;7, rear shell;8, rear cover;9, power takeoff. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Embodiment 1

[0026] As Figs. 1 to 3As shown, the embodiment provides a five-gear manual take-off interface shift gearbox assembly, which comprises a front housing and a rear cover 8, an input shaft 1 is arranged through the left side of the housing, a transmission shaft is arranged through the right side of the rear cover 8, an output shaft 5 is connected between the input shaft 1 and the transmission shaft, and a middle shaft 2 is arranged in parallel below the output shaft 5; the middle shaft 2 is connected with the input shaft 1 through a constant mesh gear, and a plurality of gears are arranged on the output shaft 5; a shift mechanism 3 is fixed on the upper side of the housing, and the shift mechanism 3 is connected with the gears on the output shaft 5 through a synchronizer 4; a driven gear is arranged on the middle shaft 2, and the driven gear is matched with the gears on the output shaft 5, and the right end of the output shaft 5 outputs torque to the transmission shaft; a take-off device 9 is arranged below the housing, and the take-off device 9 is connected with the driven gear of the middle shaft 2 through a self-gear.

[0027] As shown, Figs. 1 to 3 The technical scheme improves the whole housing structure, divides the housing into a front housing 6 and a rear housing 7, realizes a compact structure of the middle shaft 2 by three sections, thereby controlling the center distance to be 85mm, and combines high-hardness carburized gears to improve the precision of manual five-gear shifting, and the maximum input torque is 280~310NM; and the take-off device 9 is connected through the interface, which can fully utilize the power on the middle shaft 2, and simultaneously meet the double requirements of driving and driving auxiliary equipment. Specifically, after the power is output from the engine, the power is transmitted to the input shaft 1 through the clutch; the input shaft 1 is arranged through the left side of the housing, and the power of the engine is introduced into the inside of the gearbox; the middle shaft 2 is connected with the input shaft 1 through a constant mesh gear, and the constant mesh gear drives the middle shaft 2 to rotate synchronously; a driven gear is arranged on the middle shaft 2, and the driven gear is matched with the gears on the output shaft 5; when the middle shaft 2 rotates, the driven gear drives the gears on the output shaft 5 to rotate, thereby making the output shaft 5 obtain power; the right end of the output shaft 5 outputs torque to the transmission shaft, and the transmission shaft transmits power to the driving wheels of the vehicle, thereby realizing the driving of the vehicle. In the shifting process, the synchronizer 4 makes the gears on the output shaft 5 and the driven gear on the middle shaft 2 rotate at the same speed, thereby realizing smooth shifting; for example, when switching from a low gear to a high gear, the synchronizer 4 is first separated from the gears of the low gear, and then is engaged with the gears of the high gear, and the synchronizer 4 adjusts the rotating speed of the gears, thereby avoiding shifting impact. The shift mechanism 3 controls the connection between the synchronizer 4 and different gears, changes the transmission ratio of the output shaft 5 and the middle shaft 2, thereby realizing different gears; for example, in the first gear, the synchronizer 4 is connected with the gears on the output shaft 5 corresponding to the first gear, the transmission ratio of the output shaft 5 and the middle shaft 2 is large, the vehicle obtains large torque, but the vehicle speed is low; in the fifth gear, the synchronizer 4 is connected with the gears on the output shaft 5 corresponding to the fifth gear, the transmission ratio is small, the vehicle obtains high vehicle speed, but the torque is relatively small. When taking off, the self-gear of the take-off device 9 is engaged with the driven gear of the middle shaft 2, the power of the middle shaft 2 is transmitted to the take-off device 9 through the driven gear, and then the take-off device 9 outputs the power to the auxiliary equipment to be driven.

[0028] In addition, the five-gear manual take-off interface gearshift gearbox assembly according to the utility model also has the following additional technical features:

[0029] According to one embodiment of the utility model, the intermediate shaft 2 is provided below with a reverse gear mechanism, the reverse gear mechanism is connected with the intermediate shaft 2 through a gear, the intermediate shaft 2 is connected with the output shaft 5 through a passive gear, and power is transmitted to the vehicle through a transmission shaft.

[0030] The power changed in direction by the reverse gear mechanism is transmitted to the output shaft 5 through the intermediate shaft 2 and the passive gear, and is output to the driving wheel of the vehicle through the transmission shaft, so that the reverse motion is completed.

[0031] According to one embodiment of the utility model, a plurality of gears are arranged on the output shaft 5, and the gears correspond to five manual gears controlled by the gearshift mechanism 3, wherein the manual gears correspond to first gear, second gear, third gear, fourth gear and fifth gear.

[0032] The transmission ratio between the output shaft 5 and the intermediate shaft 2 is changed through gearshift operation; different transmission ratios correspond to different vehicle speeds and torque output characteristics: when the first gear and the second gear, the transmission ratio is large, the output shaft 5 rotates at a low speed but has a large torque, which is suitable for vehicle starting and climbing; when the fourth gear and the fifth gear, the transmission ratio is small, the output shaft 5 rotates at a high speed but has a small torque, which is suitable for vehicle high-speed cruising.

[0033] According to one embodiment of the utility model, the intermediate shaft 2 is provided with five passive gears in cooperation with the output shaft 5, wherein the take-off device 9 is engaged with the second gear passive gear of the intermediate shaft 2.

[0034] In the technical solution, the second gear passive gear is selected as the power take-off point, which is based on the matching of the power output characteristics at this gear position and the working requirements of the auxiliary equipment; the transmission ratio of the second gear makes the speed and torque of the intermediate shaft 2 at this gear position meet the requirements of normal operation of the auxiliary equipment, so that the auxiliary equipment cannot work normally due to too high speed or too small torque, and the gearbox and the auxiliary equipment are not damaged due to too low speed or too large torque. The auxiliary equipment driven by the take-off device 9 is, for example, a hydraulic pump, a generator, etc.

[0035] According to one embodiment of the utility model, the plurality of gears on the output shaft 5 and the passive gears on the intermediate shaft 2 are carburized gears, and the surface of the carburized gears is processed with a carburized layer.

[0036] The carburized gears and the carburized layer on the surface thereof are used to improve the wear resistance, fatigue resistance, contact strength and anti-gluing ability of the gears in the gearbox, so as to adapt to the complex and variable working conditions of the gearbox.

[0037] According to one embodiment of the present invention, the housing and the rear cover 8 are both made of aluminum / iron, and they adopt a compact structure with intermediate shaft 2. The center distance between intermediate shaft 2 and output shaft 5 is 85mm, and it can withstand a maximum input torque of 280~310NM.

[0038] In this technical solution, aluminum, with its low density and light weight, effectively reduces the overall weight of the gearbox by using it to construct some of the housing structures. Iron, with its high strength and rigidity, can withstand significant forces and torques, ensuring it will not deform or be damaged when subjected to a maximum input torque of 280~310 Nm. By setting the center distance between the intermediate shaft 2 and the output shaft 5 to 85 mm, the various components of the gearbox can be arranged rationally within a limited space, reducing the overall size of the gearbox.

[0039] The usage process of the above embodiments is as follows:

[0040] like Figs. 1 to 3 As shown, engine power is transmitted to input shaft 1 via clutch, and input shaft 1 drives intermediate shaft 2 to rotate synchronously via a normally engaged gear. During gear shifting, shifting mechanism 3 controls different gear positions on output shaft 5 to mesh with the driven gear on intermediate shaft 2 via synchronizer 4, changing the transmission ratio to achieve gear shifting. The driven gear on intermediate shaft 2 engages with the gear on output shaft 5, enabling output shaft 5 to obtain power. Its right end outputs torque to the drive shaft, driving the vehicle. During power take-off, the power take-off unit 9's own gear meshes with the second-gear driven gear on intermediate shaft 2 to obtain power to drive auxiliary equipment. Each gear is carburized to improve performance, and the housing is made of aluminum / iron to reduce weight and ensure strength. The compact structure controls the center distance to be 85mm and can withstand a maximum input torque of 280~310NM.

Claims

1. A five-gear manual take-off interface shift transmission assembly, characterized by, The housing including the front part and the rear cover (8) of the rear part, the left side of the housing is provided with an input shaft (1), the right side of the rear cover (8) is provided with a transmission shaft, the input shaft (1) and the transmission shaft are connected with an output shaft (5), the output shaft (5) is provided with an intermediate shaft (2) below; the intermediate shaft (2) is connected with the input shaft (1) through the constant gear, the output shaft (5) is provided with a plurality of gears; the upper side of the housing is fixed with a shift mechanism (3), the shift mechanism (3) is connected with the gear on the output shaft (5) through the synchronizer (4); the intermediate shaft (2) is provided with a driven gear, the driven gear is matched with the gear of the output shaft (5), the right end of the output shaft (5) outputs the torque to the transmission shaft; The lower side of the housing is provided with a power takeoff (9), the power takeoff (9) is connected with the driven gear of the intermediate shaft (2) through the self gear.

2. The five-gear manual belt take-off interface shift transmission assembly of claim 1, wherein, The lower side of the intermediate shaft (2) is provided with a reverse gear mechanism, the reverse gear mechanism is connected with the intermediate shaft (2) through the gear, the intermediate shaft (2) is connected with the output shaft (5) through the driven gear, and the power is transmitted to the vehicle through the transmission shaft.

3. The five-gear manual belt take-off interface shift transmission assembly of claim 1, wherein, The output shaft (5) is provided with a plurality of gears, which correspond to five manual gears controlled by the shift mechanism (3), wherein the manual gears correspond to first gear, second gear, third gear, fourth gear and fifth gear.

4. The five-gear manual belt take-off interface shift transmission assembly of claim 3, wherein, The intermediate shaft (2) is provided with five driven gears matched with the output shaft (5), wherein the power takeoff (9) is engaged with the second gear driven gear of the intermediate shaft (2).

5. The five speed manual belt take-off interface shift transmission assembly of claim 4, wherein, The constant gear, the plurality of gears on the output shaft (5) and the driven gear on the intermediate shaft (2) are carburizing gears, and the surface of the carburizing gear is processed with a carburizing layer.

6. The five-gear manual belt take-off interface shift transmission assembly of claim 1, wherein, The housing and the rear cover (8) are made of aluminum / iron material, which adopts the intermediate shaft (2) type compact structure, the center distance between the intermediate shaft (2) and the output shaft (5) is 85mm, and the maximum input torque is 280~310NM.

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