Gearbox applied to all-terrain vehicle

Abstract

The utility model provides a gearbox applied to an all-terrain vehicle, and relates to the technical field of gearboxes for all-terrain vehicles. The device comprises a gearbox shell, and an input shaft and an output shaft which are in transmission connection in the gearbox shell, and further comprises a first gear, a second gear and a third gear which are coaxially and fixedly connected to the input shaft in sequence in the axial direction; the fourth gear is rotationally connected into the gearbox shell and is meshed with the second gear; the combination gear is rotationally connected into the gearbox shell and slidably connected into the gearbox shell in the direction parallel to the input shaft, the first gear and the output shaft are in transmission corresponding to a low-speed gear through the combination gear, and the second gear and the output shaft are in transmission corresponding to a reverse gear through the fourth gear and the combination gear. And the third gear and the output shaft transmit corresponding high-speed gears through the combined gear. The structure is simple and compact, the reliability is good, the large-torque and high-speed requirements can be met, and different road working conditions are adapted.

Description

TECHNICAL FIELD

[0001] The utility model relates to all terrain vehicle gearbox technical field especially is related to a gearbox for all terrain vehicle. BACKGROUND

[0002] All terrain vehicle is a kind of all-weather, all-terrain four-wheel transport vehicle with bucket.The torque of the gearbox of traditional all terrain vehicle is small, can only be applied to low-torque low-speed situation, and cannot meet the requirements of all terrain vehicle to various road conditions in the face of complex terrain environment.

[0003] Therefore, a gearbox for all terrain vehicle, which is simple and compact in structure, realizes low-speed gear or reverse gear or high-speed gear conversion, is urgently needed. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of gearboxes for all terrain vehicle, solve the technical problem that the torque of gearbox in prior art is small.The many technical effects that the preferred technical solution in the many technical solutions provided by the utility model can produce are described in the following.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] The utility model provides a kind of gearbox for all terrain vehicle, including gearbox shell and the input shaft and output shaft transmission connection in the gearbox shell, further include:

[0007] First gear, second gear and third gear, the first gear, second gear and the third gear are coaxially fixedly connected on the input shaft in sequence along the axial direction;

[0008] Fourth gear, the fourth gear is rotationally connected in the gearbox shell, and is meshed with the second gear;

[0009] Combination gear, the combination gear is rotationally connected in the gearbox shell, and is slidingly connected in the gearbox shell along the parallel direction of the input shaft, the first gear is transmission corresponding low-speed gear with the output shaft by the combination gear, the second gear is transmission corresponding reverse gear with the output shaft by the fourth gear and the combination gear, the third gear is transmission corresponding high-speed gear with the output shaft by combination gear.

[0010] Preferably, further include:

[0011] First transmission shaft, the first transmission shaft is rotationally connected in the gearbox shell, and is transmission connection between the output shaft, the combination gear is axially sleeved on the first transmission shaft, and is synchronously rotated with the first transmission shaft.

[0012] Preferably, the combination gear comprises:

[0013] A speed reduction gear and a speed increase gear, the speed reduction gear and the speed increase gear are coaxially fixedly connected along the direction of the first gear to the third gear, and are coaxially arranged on the first transmission shaft and rotate synchronously with the first transmission shaft, the first gear is engaged with the speed reduction gear to correspond to the low speed gear, the fourth gear is engaged with the speed increase gear to correspond to the reverse gear, and the third gear is engaged with the speed increase gear to correspond to the high speed gear.

[0014] Preferably, further comprising:

[0015] A second transmission shaft, the second transmission shaft is rotatably connected to the transmission case, and the first transmission shaft is drivingly connected to the output shaft through the second transmission shaft.

[0016] Preferably, further comprising:

[0017] A sixth gear, the sixth gear is coaxially fixedly connected to the first transmission shaft;

[0018] A seventh gear, the seventh gear is coaxially fixedly connected to the second transmission shaft and is engaged with the sixth gear, and the second transmission shaft is drivingly connected to the output shaft through the seventh gear.

[0019] Preferably, further comprising:

[0020] An eighth gear, the eighth gear is coaxially fixedly connected to the output shaft and is arranged in engagement with the seventh gear.

[0021] Preferably, the output shaft is coaxially provided with two groups, and the two groups of output shafts are connected through a synchronizer.

[0022] Preferably, further comprising:

[0023] A third transmission shaft, the third transmission shaft is rotatably connected to the transmission case, and the fourth gear is coaxially fixedly connected to the third transmission shaft.

[0024] In the technical scheme of the utility model, when in the parking state, the position of the combination gear is adjusted to be engaged with the first gear or the second gear or the third gear, so that the low speed gear or the reverse gear or the high speed gear is converted, meanwhile, the application has simple and compact structure, good reliability, can satisfy the demand of high speed of big torque, and adapts to different road working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 is a schematic diagram of the gearbox housing of the present application;

[0027] Figure 2 is a schematic diagram of the engagement of the sixth gear, the seventh gear and the eighth gear of the present application;

[0028] Figure 3 is a schematic diagram of the engagement of the second gear, the fourth gear and the speed increasing gear of the present application;

[0029] Figure 4 is a schematic diagram of the reverse gear of the present application;

[0030] Figure 5 is a schematic diagram of the low speed gear of the present application;

[0031] Figure 6 is a schematic diagram of the high speed gear of the present application;

[0032] Figure 7 is a schematic diagram of the shift fork and the combined gear of the present application.

[0033] In the figure, 1 is a gearbox housing; 2 is an input shaft; 3 is an output shaft; 4 is a first gear; 5 is a third gear; 6 is a first transmission shaft; 7 is a speed increasing gear; 8 is a speed reducing gear; 9 is a sixth gear; 10 is a second transmission shaft; 11 is a seventh gear; 12 is an eighth gear; 13 is a third transmission shaft; 14 is a synchronizer; 15 is a second gear; 16 is a fourth gear; 17 is a shift fork; and 18 is a shift shaft. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described in detail as follows. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0035] Reference Figures 1-7 The specific embodiment of the present application provides a gearbox applied to an all-terrain vehicle, which comprises a gearbox housing 1 and an input shaft 2 and an output shaft 3 in transmission connection in the gearbox housing 1, and further comprises:

[0036] The first gear 4, the second gear 15 and the third gear 5 are fixedly connected coaxially in sequence along the axial direction on the input shaft 2;

[0037] The fourth gear 16 is rotationally connected in the transmission housing 1 and is arranged in meshing with the second gear 15;

[0038] The combined gear is rotationally connected in the transmission housing 1 and is slidingly connected in the parallel direction of the input shaft 2 in the transmission housing 1, the first gear 4 is in transmission with the output shaft 3 through the combined gear corresponding to the low speed gear, the second gear 15 is in transmission with the output shaft 3 through the fourth gear 16 and the combined gear corresponding to the reverse gear, and the third gear 5 is in transmission with the output shaft 3 through the combined gear corresponding to the high speed gear.

[0039] The transmission torque of the conventional all-terrain vehicle is small, which can only be applied to low-torque and low-speed conditions, and cannot meet the requirements of all-terrain vehicles on various road conditions in the face of complex terrain environment. In the present application, when in the parking state, the position of the combined gear is adjusted to mesh with the first gear 4 or the second gear 15 or the third gear 5, so as to realize the conversion of the low speed gear or the reverse gear or the high speed gear; at the same time, the structure of the present application is simple and compact, and has good reliability, which can meet the demand of large torque and high speed and adapt to different road conditions.

[0040] Further optimization scheme further comprises:

[0041] The first transmission shaft 6 is rotationally connected in the transmission housing 1 and is in transmission connection with the output shaft 3, and the combined gear is sleeved on the first transmission shaft 6 in the axial direction and rotates synchronously with the first transmission shaft 6.

[0042] The main function of the first transmission shaft 6 is to transmit the power of the input shaft 2 to the output shaft 3 through the combined gear.

[0043] Further optimization scheme, the combined gear comprises:

[0044] The speed reducing gear 8 and the speed increasing gear 7 are fixedly connected coaxially along the direction from the first gear 4 to the third gear 5, are sleeved (through the spline connection) on the first transmission shaft 6 in the axial direction and rotate synchronously with the first transmission shaft 6, the first gear 4 is in meshing with the speed reducing gear 8 corresponding to the low speed gear, the fourth gear 16 is in meshing with the speed increasing gear 7 corresponding to the reverse gear, and the third gear 5 is in meshing with the speed increasing gear 7 corresponding to the high speed gear.

[0045] When the reduction gear 8 and the increase gear 7 are located between the first gear 4 and the second gear 15, the reduction gear 8 and the increase gear 7 are not engaged with other gears, and the position is neutral, which can be changed to neutral after parking. When the vehicle is started and changed to low gear, the reduction gear 8 is engaged with the first gear 4, and the increase gear 7 is idling at this time; when changed to high gear, the increase gear 7 is engaged with the third gear 5, and the reduction gear 8 is idling at this time; when changed to reverse gear, the increase gear 7 is engaged with the fourth gear 16, and the reduction gear 8 is idling at this time.

[0046] Further optimization scheme, still includes:

[0047] The second transmission shaft 10 is rotatably connected to the transmission housing 1, and the first transmission shaft 6 is drivingly connected to the output shaft 3 through the second transmission shaft 10.

[0048] Further optimization scheme, still includes:

[0049] The sixth gear 9 is coaxially and fixedly connected to the first transmission shaft 6.

[0050] The seventh gear 11 is coaxially and fixedly connected to the second transmission shaft 10 and engaged with the sixth gear 9, and the second transmission shaft 10 is drivingly connected to the output shaft 3 through the seventh gear 11.

[0051] Further optimization scheme, still includes:

[0052] The eighth gear 12 is coaxially and fixedly connected to the output shaft 3 and arranged in engagement with the seventh gear 11.

[0053] Further optimization scheme, the output shaft 3 is coaxially provided with two groups, and the two groups of output shafts 3 are connected through the synchronizer 14.

[0054] Through the synchronizer 14, one group of output shafts 3 can drive the front wheels, and the other group of output shafts 3 can drive the rear wheels, realizing front drive (or rear drive) or front and rear dual drive (four-wheel drive).

[0055] Further optimization scheme, still includes:

[0056] The third transmission shaft 13 is rotatably connected in the transmission housing 1, and the fourth gear 16 is coaxially and fixedly connected to the third transmission shaft 13.

[0057] Further optimization scheme, still includes:

[0058] The shift shaft 18 penetrates the transmission housing 1 in the parallel direction of the input shaft 2.

[0059] The shift fork 17 is fixedly connected to the shift shaft 18 and is limited (axially limited) in the clamping groove (not labeled in the figure) between the reduction gear 8 and the speed-up gear 7.

[0060] The arc on the shift fork 17 is in contact with the arc in the clamping groove; the shift shaft 18 is axially moved manually or by electricity, and the combined gear is moved by the shift fork 17 to realize the conversion of the low gear, the reverse gear, the high gear, or the neutral gear.

[0061] In this article, the shafts and gears in fixed connection are all integrated structures.

[0062] Overall, all the gear transmissions are carried out in the gearbox housing 1, and the transmission gears between the input shaft 2 and the output shaft 3 are as follows:

[0063] Low gear: the reduction gear 8 is engaged with the first gear 4, and is transmitted to the second transmission shaft 10 through the first transmission shaft 6, the sixth gear 9, and the seventh gear 11, and is then transmitted to the output shaft 3 through the seventh gear 11 and the eighth gear 12, thereby realizing front drive (or rear drive) or front-rear dual drive (four-wheel drive) through the synchronizer 14.

[0064] High gear: the speed-up gear 7 is engaged with the third gear 5, and is transmitted to the second transmission shaft 10 through the first transmission shaft 6, the sixth gear 9, and the seventh gear 11, and is then transmitted to the output shaft 3 through the seventh gear 11 and the eighth gear 12, thereby realizing front drive (or rear drive) or front-rear dual drive (four-wheel drive) through the synchronizer 14.

[0065] Reverse gear: the second gear 15 is engaged with the fourth gear 16 and is transmitted to the third transmission shaft 13, the fourth gear 16 is engaged with the speed-up gear 7, and is transmitted to the output shaft 3 through the first transmission shaft 6, the sixth gear 9, the seventh gear 11, the second transmission shaft 10, the seventh gear 11, and the eighth gear 12, thereby realizing front drive (or rear drive) or front-rear dual drive (four-wheel drive) through the synchronizer 14.

[0066] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicated in this article indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting this application. In addition, the terms "first", "second", "third", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0067] In the description herein, it also needs to be explained that, unless explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gearbox for an all-terrain vehicle, comprising a gearbox housing (1) and an input shaft (2) and an output shaft (3) which are drivingly connected inside the gearbox housing (1), characterized in that, Also include: The first gear (4), the second gear (15) and the third gear (5), the first gear (4), the second gear (15) and the third gear (5) are fixedly connected coaxially in sequence along the axis on the input shaft (2); The fourth gear (16) is rotatably connected in the gearbox housing (1), and is meshed with the second gear (15); The combination gear is rotatably connected in the gearbox housing (1), and is slidingly connected in the parallel direction of the input shaft (2) in the gearbox housing (1), the first gear (4) is driven by the combination gear and the output shaft (3) corresponding to the low speed gear, the second gear (15) is driven by the fourth gear (16) and the combination gear and the output shaft (3) corresponding to the reverse gear, the third gear (5) is driven by the combination gear and the output shaft (3) corresponding to the high speed gear.

2. The transmission for use in an all-terrain vehicle according to claim 1, characterized in that, Also include: The first transmission shaft (6) is rotatably connected in the gearbox housing (1), and is drivingly connected between the output shaft (3), the combination gear is axially sleeved on the first transmission shaft (6), and rotates synchronously with the first transmission shaft (6).

3. The transmission for use in an all-terrain vehicle according to claim 2, characterized in that, The combination gear includes: The reduction gear (8) and the speed increasing gear (7), the reduction gear (8) and the speed increasing gear (7) are coaxially fixedly connected along the direction of the first gear (4) to the third gear (5), and are axially sleeved on the first transmission shaft (6) and rotate synchronously with the first transmission shaft (6), the first gear (4) and the reduction gear (8) are engaged corresponding to the low speed gear, the fourth gear (16) and the speed increasing gear (7) are engaged corresponding to the reverse gear, the third gear (5) and the speed increasing gear (7) are engaged corresponding to the high speed gear.

4. The transmission for use in an all-terrain vehicle according to claim 2, characterized in that, Also include: The second transmission shaft (10) is rotatably connected in the gearbox housing (1), the first transmission shaft (6) is drivingly connected with the output shaft (3) through the second transmission shaft (10).

5. The transmission for use in an all-terrain vehicle according to claim 4, characterized in that Also include: The sixth gear (9) is coaxially fixedly connected on the first transmission shaft (6); The seventh gear (11) is coaxially fixedly connected on the second transmission shaft (10), and is engaged with the sixth gear (9), the second transmission shaft (10) is drivingly connected with the output shaft (3) through the seventh gear (11).

6. The transmission for use in an all-terrain vehicle according to claim 5, characterized in that, Also include: The eighth gear (12) is coaxially fixedly connected on the output shaft (3), and is meshed with the seventh gear (11).

7. The transmission for use in an all-terrain vehicle as defined in claim 1, characterized by The output shaft (3) is coaxially provided with two groups, and the two groups of output shafts (3) are connected through the synchronizer (14).

8. The transmission for use in an all-terrain vehicle of claim 1, wherein, Also include: The third transmission shaft (13) is rotatably connected in the gearbox housing (1), the fourth gear (16) is coaxially fixedly connected on the third transmission shaft (13).

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