Vertical halving three-section type light five-gear manual gearbox

Abstract

The utility model relates to the technical field of gearboxes, in particular to a vertical halving three-section type light five-gear manual gearbox. The power take-off device comprises a gearbox assembly and a power take-off device assembly. The gearbox assembly is of a vertical split three-section structure and comprises a front shell, a rear shell and a rear cover, and a closed cavity is formed. An input shaft, an intermediate shaft and an output shaft are arranged in the gearbox assembly; an installation connector of the power takeoff assembly is reserved in a front shell of the gearbox assembly, and the power takeoff assembly is connected with the second-gear gear of the intermediate shaft through the installation connector. A vertical split three-section type structure is adopted, a three-fork-shaft tower type gear shifting structure is utilized to enable the gear shifting mechanism to be more compact, the front shell is provided with the installation connector connected with the power takeoff assembly, the whole power takeoff assembly is of a light-weight structure, and the power takeoff assembly is suitable for agricultural tricycles, miniature trucks, light trucks and dump trucks.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox technical field, concretely relates to a vertical split three -section type light -duty five -gear manual gearbox. BACKGROUND

[0002] The traditional manual gearbox is complex in structure, large in size, and the shift mechanism is not compact enough, which is not convenient to operate. For agricultural tricycle, micro truck, light truck and dump truck, the weight and size of the gearbox often become the bottleneck of design. For example, Chinese patent authorized publication number CN219317481U discloses an AMT gearbox assembly with hydraulic retarder, which adopts a series type liquid buffer, is installed at a lower position, can guarantee the differentiation needs of various vehicle models, integrates a side power take-off assembly and can continuously take power, although the series type liquid buffer design can meet the needs of various vehicle models and the integrated side power take-off realizes continuous power taking, but there is still room for improvement. Therefore, the market urgently needs a new type of manual gearbox, which requires more compact structure, lighter weight and more convenient shift operation to better adapt to the needs of various vehicle models. SUMMARY

[0003] The utility model solves the technical problems: overcome the prior art's insufficient, provide a vertical split three -section type light -duty five -gear manual gearbox to solve the prior art in the complex structure, size, shift mechanism is not compact and the problems such as heavy weight.

[0004] The utility model adopts the technical scheme as follows:

[0005] A vertical split three -section type light -duty five -gear manual gearbox, including gearbox assembly and power take -off assembly, the gearbox assembly adopts vertical split three -section type structure, and the gearbox assembly includes front shell body, rear shell body and rear cover, and forms a closed cavity, the shell material of gearbox assembly is aluminum or iron, the gearbox assembly is built -in input shaft, intermediate shaft and output shaft, the input shaft is connected with engine, and torque transmission is controlled through the clutch, the intermediate shaft is connected with the input shaft through the normal meshing gear, the output shaft is connected with the shift mechanism through the synchronizer, the shift mechanism adopts three -pronged shaft tower type shift structure, the shift mechanism is locked through the gear and the output shaft, and the torque output to the transmission shaft of vehicle is transmitted through the passive gear of intermediate shaft, the front shell body of gearbox assembly reserves the installation interface of power take -off assembly, and the power take -off assembly is connected with the second gear of intermediate shaft through the installation interface.

[0006] The technical scheme adopts a vertical split three-section structure, utilizes a three-prong shaft tower type gear shifting structure to make the gear shifting mechanism more compact, the front shell body is provided with a mounting interface connected with a power take-off assembly, and the whole adopts a lightweight structure, and is suitable for agricultural three-wheelers, micro trucks, light trucks and self-unloading trucks. Specifically, the vertical split three-section structure divides the gearbox into several relatively independent modules in the vertical direction, facilitating assembly, maintenance and replacement of parts; the front shell body, the rear shell body and the rear cover form a closed cavity to prevent dust and moisture from causing damage; the shell body material is selected from aluminum or iron, the aluminum material has the advantages of small density, light weight and good corrosion resistance, the whole adopts a lightweight structure, and the energy consumption of the vehicle is reduced; the input shaft is connected with the engine, torque transmission is controlled through a clutch, the clutch functions to cut off power transmission during gear shifting to avoid gear shifting impact; the intermediate shaft is connected with the input shaft through a constant mesh gear, and the output shaft is connected with the gear shifting mechanism through a synchronizer; the three-prong shaft tower type gear shifting structure makes the gear shifting mechanism more compact and flexible, the front shell body of the gearbox assembly reserves a mounting interface of the power take-off assembly, the power take-off assembly is connected with the second gear of the intermediate shaft through the mounting interface, and it is ensured that the power take-off assembly can stably and reliably obtain power input.

[0007] In addition, the vertical split three-section lightweight five-gear manual gearbox according to the above-mentioned technical scheme of the utility model can further have the following additional technical features.

[0008] According to one embodiment of the utility model, the center distance of the gearbox assembly is 70mm, and the maximum input torque is 150N*m.

[0009] In the technical scheme, the center distance refers to the distance between the center lines of two adjacent gears in the gearbox; the 70mm of the gearbox assembly is a smaller center distance, which means that smaller gears and more gears are needed to achieve the required transmission ratio. The input torque refers to the maximum torque value that the input shaft of the gearbox can withstand, and the maximum input torque determines the maximum power that the gearbox can transmit.

[0010] According to one embodiment of the utility model, the gear shifting mechanism includes a three-prong shaft, each branch of the three-prong shaft is connected with one or more gear shifting forks; the gear shifting forks push or release the synchronizer by moving to form a three-dimensional, multi-level three-prong shaft tower type gear shifting structure.

[0011] In the technical solution, the shift fork is moved by the driving of the three-pronged shaft. When gear shifting is needed, the corresponding shift fork is pushed or pulled to engage or disengage with the synchronizer, and the movement of the shift fork directly acts on the synchronizer. Through the three-pronged shaft tower type gear shifting structure in three dimensions and multiple levels, the shift forks and the synchronizers are arranged at different levels to realize the gear shifting function of multiple gears. Each level corresponds to a specific gear or a group of gears. The three-dimensional layout improves the space utilization, makes the gear shifting mechanism more compact and efficient, and reduces the impact and vibration during gear shifting.

[0012] According to an embodiment of the utility model, the middle shaft adopts the stepped optical axis, is provided with driven gear which realizes different gear switching on it.

[0013] The stepped optical axis of the technical solution arranges multiple driven gears with different diameters in the limited axial space, and each step corresponds to a specific gear or a group of gears, thereby realizing the multi-gear arrangement in the compact space.

[0014] According to an embodiment of the utility model, the surface of the always meshing gear and the driven gear is covered with carburizing strengthening layer.

[0015] The carburizing strengthening layer of the technical solution significantly improves the hardness of the gear surface, reduces the friction loss when the gears mesh, improves the stress distribution inside, and enhances the fatigue strength.

[0016] According to an embodiment of the utility model, the gearbox assembly has five gears, which are divided into first gear, second gear, third gear, fourth gear and fifth gear.

[0017] In the technical solution, the gearbox provides multiple power transmission paths for the engine through different gear combinations; at low gear, power is transmitted through a larger transmission ratio to provide stronger acceleration capability; at high gear, power is transmitted through a smaller transmission ratio to maintain a higher vehicle speed and reduce fuel consumption.

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

[0019] The utility model adopts the structure of vertical bisection three sections, utilizes three-pronged shaft tower type gear shifting structure to make gear shifting mechanism more compact, the front shell body is provided with the installation interface connected with the power takeoff assembly, adopts the light weight structure as a whole, is applicable to agricultural three-wheel car, micro truck, light truck, self-unloading truck. DRAWINGS

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

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

[0022] Fig. 3 This is a side view of the present invention.

[0023] In the diagram: 1. Front housing; 2. Rear housing; 3. Rear cover; 4. Power take-off assembly; 5. Input shaft; 6. Intermediate shaft; 7. Synchronizer; 8. Gear shifting mechanism; 9. Output shaft. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] like Figs. 1-3 As shown, this embodiment provides a vertically split three-section lightweight five-speed manual transmission, including a transmission assembly and a power take-off (PTO) assembly 4. The transmission assembly adopts a vertically split three-section structure, including a front housing 1, a rear housing 2, and a rear cover 3, forming a closed cavity. The housing material of the transmission assembly is aluminum or iron. The transmission assembly has an input shaft 5, an intermediate shaft 6, and an output shaft 9. The input shaft 5 is connected to the engine, and torque transmission is controlled by a clutch. The intermediate shaft 6 is connected to the input shaft 5 through a constant mesh gear, and the output shaft 9 is connected to the shift mechanism 8 through a synchronizer 7. The shift mechanism 8 adopts a three-fork tower-type shift structure, and the shift mechanism 8 is locked to the output shaft 9 through gears. The torque transmitted by the driven gear of the intermediate shaft 6 is output to the vehicle's drive shaft. The front housing 1 of the transmission assembly has a reserved mounting interface for the PTO assembly 4, and the PTO assembly 4 is connected to the second gear of the intermediate shaft 6 through the mounting interface.

[0027] like Figs. 1-3As shown, the technical scheme adopts a vertical split three-section structure, utilizes the three-prong shaft tower type gear shifting structure to make the gear shifting mechanism 8 more compact, the front shell 1 is provided with a mounting interface connected with the power take-off assembly 4, and the whole adopts a lightweight structure, and is suitable for agricultural three-wheelers, micro trucks, light trucks and self-unloading trucks. Specifically, the vertical split three-section structure divides the gearbox into several relatively independent modules in the vertical direction, facilitating assembly, maintenance and replacement of parts; the front shell 1, the rear shell 2 and the rear cover 3 form a closed cavity to prevent dust and moisture from causing damage; the shell material is selected from aluminum or iron, the aluminum material has the advantages of small density, light weight and good corrosion resistance, the whole adopts a lightweight structure, and the energy consumption of the vehicle is reduced; the input shaft 5 is connected with the engine, the torque transmission is controlled through the clutch, the clutch functions to cut off the power transmission during gear shifting to avoid gear shifting impact; the intermediate shaft 6 is connected with the input shaft 5 through the constant mesh gear, and the output shaft 9 is connected with the gear shifting mechanism 8 through the synchronizer 7; the three-prong shaft tower type gear shifting structure makes the gear shifting mechanism 8 more compact and flexible, the front shell 1 of the gearbox assembly is provided with a mounting interface of the power take-off assembly 4, the power take-off assembly 4 is connected with the second gear of the intermediate shaft 6 through the mounting interface, and the power take-off assembly 4 can stably and reliably obtain power input.

[0028] In addition, the vertical split three-section lightweight five-gear manual gearbox according to the above-mentioned technical scheme of the utility model can further have the following additional technical features:

[0029] According to an embodiment of the utility model, the center distance of the gearbox assembly is 70mm, and the maximum input torque is 150N*m.

[0030] In the technical scheme, the center distance refers to the distance between the center lines of two adjacent gears in the gearbox; the 70mm of the gearbox assembly is a smaller center distance, which means that smaller gears and more gears are needed to achieve the required transmission ratio. The input torque refers to the maximum torque value that the input shaft 5 of the gearbox can withstand, and the maximum input torque determines the maximum power that the gearbox can transmit.

[0031] According to an embodiment of the utility model, the gear shifting mechanism 8 includes a three-prong shaft, each branch of the three-prong shaft is connected with one or more gear shifting forks; the gear shifting forks push or release the synchronizer 7 by moving to form a three-dimensional, multi-level three-prong shaft tower type gear shifting structure.

[0032] In this technical solution, the shift fork moves via a three-pronged shaft. When a gear shift is required, the corresponding fork is pushed or pulled to engage or disengage with the synchronizer 7; the movement of the shift fork directly acts on the synchronizer 7. Through a three-dimensional, multi-layered three-pronged shaft tower-type shifting structure, shift forks and synchronizers 7 are arranged at different levels, thereby realizing the function of shifting multiple gears. Each level corresponds to a specific gear or a set of gears. The three-dimensional layout improves space utilization, making the shifting mechanism 8 more compact and efficient, and reducing the impact and vibration during shifting.

[0033] According to one embodiment of the present invention, the intermediate shaft 6 is a stepped optical shaft, on which a driven gear is provided to achieve switching between different gears.

[0034] The stepped optical shaft of this technical solution arranges multiple driven gears of different diameters within a limited axial space. Each step corresponds to a specific gear or a set of gears, thus realizing a multi-gear arrangement in a compact space.

[0035] According to one embodiment of the present invention, the surfaces of the constant meshing gear and the driven gear are both covered with a carburized reinforcement layer.

[0036] The carburized reinforcement layer in this technical solution significantly improves the surface hardness of the gear, reduces friction loss during gear meshing, improves the internal stress distribution, and enhances fatigue strength.

[0037] According to one embodiment of the present invention, the gearbox assembly has five gears, namely first gear, second gear, third gear, fourth gear and fifth gear.

[0038] In this technical solution, the transmission provides multiple power transmission paths to the engine through different gear combinations; in low gears, power is transmitted through a larger transmission ratio to provide stronger acceleration; in high gears, power is transmitted through a smaller transmission ratio to maintain higher vehicle speed and reduce fuel consumption.

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

[0040] like Figs. 1-3 As shown, engine power is transmitted to the gearbox via input shaft 5, driving intermediate shaft 6 to rotate through constant mesh gears. During gear shifting, the shift forks of the three-way tower shift mechanism 8 move under drive, pushing or releasing synchronizer 7, locking output shaft 9 with the corresponding gear on intermediate shaft 6, thus achieving power transmission. The front housing 1 has a reserved interface for connecting to the power take-off assembly 4, which obtains power through the second gear on intermediate shaft 6. The gearbox is vertically divided into three sections for easy assembly and maintenance; the housing material is lightweight, reducing energy consumption; the carburized reinforced gears improve hardness and wear resistance. Five gears provide different transmission ratios to adapt to different driving conditions; lower gears enhance acceleration, while higher gears improve fuel economy.

[0041] Although the utility model is described in detail by referring to the drawings and in conjunction with the preferred embodiments, the utility model is not limited thereto. Without departing from the spirit and essence of the utility model, those skilled in the art can make various equivalent modifications or replacements to the embodiments of the utility model, and these modifications or replacements should be within the scope of the utility model. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, and these changes or replacements should be within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A vertically-split three-part light-duty five-speed manual transmission, characterized by, The gearbox assembly and the power take-off assembly (4) are included; the gearbox assembly adopts vertical split three-section structure, the gearbox assembly includes front shell (1), rear shell (2) and rear cover (3), forming a closed cavity; the shell material of the gearbox assembly is aluminum or iron; the gearbox assembly is internally provided with input shaft (5), intermediate shaft (6) and output shaft (9), the input shaft (5) is connected with the engine, and the torque transmission is controlled through the clutch; the intermediate shaft (6) is connected with the input shaft (5) through the constant mesh gear, the output shaft (9) is connected with the shift mechanism (8) through the synchronizer (7), the shift mechanism (8) adopts three-prong shaft tower type shift structure, the shift mechanism (8) is locked with the output shaft (9) through the gear, and the torque of the power transmitted through the passive gear of the intermediate shaft (6) is output to the drive shaft of the vehicle; the front shell (1) of the gearbox assembly reserves the installation interface of the power take-off assembly (4), and the power take-off assembly (4) is connected with the second gear of the intermediate shaft (6) through the installation interface.

2. The vertically-split three-part light-duty five-speed manual transmission of claim 1, wherein, The center distance of the gearbox assembly is 70mm, and the maximum input torque is 150N*m.

3. The vertically-split three-part light-duty five-speed manual transmission of claim 1, wherein, The shift mechanism (8) includes a three-prong shaft, each branch of the three-prong shaft is connected with one or more shift forks; the shift fork pushes or releases the synchronizer (7) by moving, forming a three-prong shaft tower type shift structure with three-dimensional and multi-level.

4. The vertically-split three-part light-duty five-speed manual transmission of claim 1, wherein, The intermediate shaft (6) adopts stepped optical axis, and a driven gear for realizing different gear switching is arranged on the stepped optical axis.

5. The vertically-split three-part light-duty five-speed manual transmission of claim 4, wherein, The surfaces of the constant mesh gear and the driven gear are covered with carburizing strengthening layer.

6. The vertically-split three-part light-duty five-speed manual transmission of claim 1, wherein, The gearbox assembly has five gears, which are divided into first gear, second gear, third gear, fourth gear and fifth gear.

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