Speed reducer and all-terrain vehicle using the same

Abstract

The application discloses a reduction gearbox and an all-terrain vehicle adopting the same. The reduction gearbox comprises a shell, a bearing seat, bearings and a transmission shaft. The bearing seat is detachably connected with the shell, the bearings are installed on the bearing seat, and the transmission shaft is rotatably connected with the bearing seat through the bearings. Both the bearings and the transmission shaft are provided with at least two. The bearing seat comprises a connecting portion and at least two integrally-formed bearing mounting portions. Each bearing mounting portion is provided with a bearing hole, one bearing is installed in each bearing hole, and the axes of the at least two bearing holes do not coincide. The connecting portion is detachably connected with the shell, the connecting portion is provided with a positioning hole, the reduction gearbox further comprises a positioning piece, and the positioning piece passes through the positioning hole and the shell to position the bearing seat and the shell. The all-terrain vehicle comprises the above reduction gearbox. Through the above arrangement, the installation requirements of bearings of different shafts in the bearing seat can be met, and the assembly accuracy of the bearing seat and the shell can be improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a gearbox and an all-terrain vehicle using the gearbox. Background Technology

[0002] An all-terrain vehicle (ATV) is a vehicle designed to travel in complex terrain. ATVs typically have strong off-road capabilities and can travel on unconventional surfaces such as beaches, mud, snow, and mountains.

[0003] All-terrain vehicles typically include a frame, body panels, running gear, suspension system, powertrain, and reducer. The reducer lowers the rotational speed at which the powertrain outputs power, thereby increasing the torque. A reducer typically includes a housing, bearing housings, bearings, a driveshaft, and drive gears. Bearings are mounted within the bearing housings and connected to the driveshaft. Existing bearing housings can only accommodate multiple bearings mounted on the same shaft, and cannot meet the needs of mounting bearings on multiple different shafts.

[0004] At the same time, since the transmission of the drive shaft requires high precision, the assembly precision of the bearing housing and the housing is also required to be high.

[0005] Therefore, how to meet the bearing installation requirements of multiple different shafts while improving assembly accuracy is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this application is to provide a gearbox and an all-terrain vehicle using the gearbox, wherein the bearing housing can meet the bearing installation requirements of multiple different shafts and improve the assembly accuracy with the housing.

[0007] In a first aspect, embodiments of this application provide a gearbox, which includes a housing, a bearing housing, a bearing, and a drive shaft. The bearing housing is detachably connected to the housing, the bearing is mounted in the bearing housing, and the drive shaft is rotatably connected to the bearing housing via the bearing. At least two bearings and at least two drive shafts are provided. The bearing housing includes a connecting portion and at least two integrally formed bearing mounting portions. Each bearing mounting portion has a bearing hole, and one bearing is installed in each bearing hole; the axes of at least two bearing holes do not coincide. The connecting portion is detachably connected to the housing, and a positioning hole is provided on the connecting portion. The gearbox also includes a positioning member that passes through the positioning hole and the housing to position the bearing housing and the housing.

[0008] In one possible implementation, the axes of at least two bearing holes are substantially parallel.

[0009] In one possible implementation, the bearing mounting part is also provided with a receiving hole. In the same bearing mounting part, the receiving hole and the bearing hole are connected in the axial direction of the bearing hole. The minimum diameter of the receiving hole is greater than or equal to the diameter of the bearing hole. A transmission gear is connected to the transmission shaft and can rotate in the receiving hole.

[0010] In one possible implementation, the receiving holes on two adjacent bearing mounting portions are connected radially in the bearing bore so that the transmission gears on two adjacent transmission shafts can mesh and transmit power.

[0011] In one possible implementation, the receiving hole and the bearing hole at least partially overlap radially along the bearing hole, and the minimum diameter of the receiving hole is larger than the diameter of the bearing hole.

[0012] In one possible implementation, the bearing mounting portion is provided with a first oil passage hole, which communicates with the bearing bore in the same bearing mounting portion. The first oil passage hole is adapted to deliver lubricating oil to the bearing in the bearing bore.

[0013] In one possible implementation, the bearing mounting portion is further provided with a second oil passage hole, which is connected to the receiving hole in the same bearing mounting portion. The second oil passage hole is adapted to deliver lubricating oil to the transmission gear.

[0014] In one possible implementation, at least two bearing holes have different depths along their respective axial directions; at least two bearing holes have different diameters; and at least two bearing holes do not overlap at least partially in any bearing hole radial direction.

[0015] In one possible implementation, the connecting portion is at least partially arranged around all bearing mounting portions, and the connecting portion has multiple connecting holes that can be detachably connected to the housing.

[0016] Secondly, embodiments of this application provide an all-terrain vehicle, which includes a frame, a running gear, a suspension system, and a powertrain. The running gear is at least partially located below the frame, the suspension system connects the running gear to the frame, and the powertrain is supported by the frame. The all-terrain vehicle also includes the aforementioned gearbox, which drivesly connects the powertrain and the running gear.

[0017] The aforementioned gearbox and the all-terrain vehicle using the gearbox, by opening at least two bearing holes with non-coincident axes in the bearing housing, enable the installation of multiple bearings with different axes in multiple bearing holes with non-coincident axes, thereby meeting the installation requirements of multiple bearings with different axes in the bearing housing; at the same time, the positioning holes on the positioning parts and the connecting parts can improve the assembly accuracy of the bearing housing and the housing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the gearbox provided in an embodiment of this application.

[0019] Figure 2 This is a cross-sectional schematic diagram of the gearbox provided in an embodiment of this application.

[0020] Figure 3 Examples of this application Figure 2 Enlarged diagram of point A in the diagram.

[0021] Figure 4 This is a schematic diagram of the bearing housing of the gearbox provided in an embodiment of this application.

[0022] Figure 5 This is a structural schematic diagram of the bearing housing of the gearbox provided in an embodiment of this application from another perspective.

[0023] Figure 6 Examples of this application Figure 5 Schematic diagram of the cross section at point II.

[0024] Figure 7 This is a structural schematic diagram of an all-terrain vehicle provided in an embodiment of this application. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0026] like Figures 1 to 3 As shown, this application provides a gearbox 100, which includes a housing 11, a bearing housing 12, a bearing 13, and a drive shaft 14. The housing 11 forms the basic frame of the gearbox 100, supporting the bearing housing 12, the bearing 13, and the drive shaft 14. The bearing 13 is mounted on the bearing housing 12, connects to the drive shaft 14, and allows the drive shaft 14 to rotate relative to the housing 11. The drive shaft 14 transmits and outputs power to the gearbox 100.

[0027] The bearing housing 12 is detachably connected to the housing 11 to facilitate assembly and disassembly. The drive shaft 14 is rotatably connected to the bearing housing 12 via a bearing 13, allowing the bearing housing 12 to support the drive shaft 14 through the bearing 13, thereby improving the assembly stability of the drive shaft 14. More specifically, at least two bearings 13 and at least two drive shafts 14 are provided, and each drive shaft 14 is rotatably connected to the bearing housing 12 via at least one bearing 13, so that at least two bearings 13 can be arranged on different axes.

[0028] like Figure 4As shown, in this embodiment, the bearing housing 12 includes a connecting portion 122 and at least two integrally formed bearing mounting portions 121. The bearing mounting portions 121 can mount the bearing 13, and the integrally formed components can improve the structural strength of the two bearing mounting portions 121, thereby improving the overall structural strength of the bearing housing 12. The connecting portion 122 can connect the bearing mounting portions 121 to the housing 11, facilitating the assembly of the bearing housing 12.

[0029] Furthermore, since the gearbox 100 has high requirements for transmission accuracy and reliability, the assembly accuracy and reliability of the bearings 13 and bearing housings 12 within the gearbox 100 are also high, to avoid positional misalignment of the bearings 13 and bearing housings 12 that would reduce the reliability and transmission accuracy of the drive shaft 14. In this application, by integrally molding multiple bearing mounting portions 121, the structural strength of the bearing housing 12 can be improved, and positional misalignment of the bearings 13 mounted to the bearing housing 12 can be avoided, thereby improving the reliability and assembly accuracy of the bearing housing 12 and the bearings 13.

[0030] Specifically, refer to Figure 5 and Figure 6 Each bearing mounting part 121 has a bearing hole 1211, and a bearing 13 is installed in each bearing hole 1211, thereby realizing the mating installation of the bearing hole 1211 and the bearing 13. Furthermore, the axes of at least two bearing holes 1211 do not coincide.

[0031] The following explanation will be based on the example where two of each of the drive shaft 14, bearing 13, and bearing mounting part 121 are provided.

[0032] The transmission shaft 14 includes a first transmission shaft 141 and a second transmission shaft 142 with different shaft configurations; the bearing 13 includes a first bearing 131 and a second bearing 132; and the bearing mounting part 121 includes a first mounting part 1216 and a second mounting part 1217.

[0033] The first bearing 131 is installed into the bearing hole 1211 of the first mounting part 1216, and the first drive shaft 141 is rotatably connected to the first mounting part 1216 via the first bearing 131. The second bearing 132 is installed into the bearing hole 1211 of the second mounting part 1217, and the second drive shaft 142 is rotatably connected to the second mounting part 1217 via the second bearing 132. Since the axes of the bearing holes 1211 of the first mounting part 1216 and the second mounting part 1217 do not coincide, that is, the bearing holes 1211 of the first mounting part 1216 and the second mounting part 1217 are not set on the same axis, the first drive shaft 141 and the second drive shaft 142, which are set on different axes, can be rotatably connected to the first mounting part 1216 and the second mounting part 1217 respectively via the first bearing 131 and the second bearing 132. This allows the bearing housing 12 to meet the installation requirements of multiple bearings 13 with different axes, which is beneficial to improving the practicality of the bearing housing 12.

[0034] More specifically, the connecting part 122 is detachably connected to the housing 11. This arrangement facilitates the assembly and disassembly of the bearing housing 12 and the housing 11, thereby improving the ease of assembly of the bearing housing 12.

[0035] It should be noted that existing bearing housings are positioned with the housing using a stop, but the stop requires high machining accuracy for both the bearing housing and the housing, and the machining is difficult. Therefore, the connecting part 122 of this application is provided with a positioning hole 1222, which can position the bearing housing 12 and the housing 11. With this design, the bearing housing 12 and the housing 11 can be positioned without machining the stop, which simplifies the machining process of positioning the bearing housing 12 and the housing 11 and reduces the machining difficulty.

[0036] In some embodiments, the gearbox 100 further includes a positioning member 10, which passes through the positioning hole 1222 and the housing 11 to position the bearing seat 12 and the housing 11, thereby improving the assembly accuracy and assembly efficiency of the bearing seat 12.

[0037] In some embodiments, the positioning element 10 may be a pin.

[0038] In some embodiments, multiple positioning holes 1222 may be provided, and multiple positioning elements 10 may also be provided. Each positioning element 10 passes through the housing 11 and a positioning hole 1222, thereby further improving the assembly accuracy of the housing 11 and the bearing seat 12.

[0039] In summary, this application, by providing multiple bearing holes 1211 with non-coincident axes, facilitates the assembly of multiple bearings 13 with different axes into the bearing housing 12, thereby meeting the assembly requirements of multiple bearings 13 with different axes. Secondly, the connecting part 122 improves the ease of assembly of the bearing housing 12, which is beneficial for the maintenance and replacement of components such as the bearing housing 12 and bearings 13. In addition, the positioning hole 1222 and the positioning element 10 improve the assembly accuracy between the bearing housing 12 and the housing 11, and reduce the machining difficulty of the bearing housing 12 and the housing 11.

[0040] In one embodiment, the connecting portion 122 and the bearing hole 1211 are arranged without overlapping in the radial direction of the bearing hole 1211. This arrangement avoids interference between the connecting portion 122 and the assembly of the bearing 13 and the bearing hole 1211, thus facilitating the overall assembly of the gearbox 100. In this application, the connecting portion 122 and the bearing hole 1211 may also be arranged with at least partial overlap in the radial direction of the bearing hole 1211, as long as the connecting portion 122 does not interfere with the assembly of components within the bearing housing 12.

[0041] In one implementation, the axes of at least two bearing holes 1211 are substantially parallel. This arrangement ensures that the axes of the bearings 13 installed in the bearing holes 1211 are substantially parallel, thereby making the drive shafts 14 connected to the bearings 13 substantially parallel. Furthermore, since drive gears 15 are connected to the drive shafts 14, the substantially parallel drive shafts 14 facilitate meshing transmission between the drive gears 15 on different drive shafts 14, thereby improving the operational stability of the gearbox 100.

[0042] In one embodiment, the bearing mounting part 121 is also provided with a receiving hole 1212, which can provide mounting space for the transmission gear 15 so that the transmission gear 15 can rotate within the receiving hole 1212.

[0043] Specifically, in the same bearing mounting portion 121, the receiving hole 1212 and the bearing hole 1211 are axially connected in the bearing hole 1211. This arrangement allows the bearing 13 to be assembled into the bearing hole 1211 from the receiving hole 1212. More specifically, the minimum diameter of the receiving hole 1212 is greater than or equal to the diameter of the bearing hole 1211. Since the diameter of the bearing 13 is the same as the diameter of the bearing hole 1211, this arrangement prevents the bearing 13 from being unable to pass through the receiving hole 1212 and thus avoids the bearing 13 being unable to be assembled into the bearing hole 1211, thereby facilitating the assembly of the bearing 13 within the bearing housing 12. Secondly, the diameter of the drive shaft 14 in this application is smaller than the diameter of the bearing hole 1211. This arrangement prevents interference between the receiving hole 1212 and the drive shaft 14, thus facilitating the normal rotation of the drive shaft 14. Furthermore, the diameter of the receiving hole 1212 in this application is greater than or equal to the diameter of the transmission gear 15, which can prevent the transmission gear 15 from interfering with the receiving hole 1212, thus facilitating the normal operation of the transmission gear 15.

[0044] In one embodiment, the receiving holes 1212 on two adjacent bearing mounting portions 121 are radially connected to the bearing holes 1211. This arrangement allows the transmission gears 15 installed in the receiving holes 1212 to connect at the connection point of the two receiving holes 1212, so that the transmission gears 15 on two adjacent transmission shafts 14 can mesh and transmit power.

[0045] In one implementation, at least two bearing holes 1211 do not overlap at least partially in the radial direction of any bearing hole 1211. This arrangement allows at least two bearing holes 1211 to be staggered axially in any bearing hole 1211 to meet the assembly requirements of different mounting positions of the bearing 13.

[0046] In order for the two adjacent bearing holes 1211 to mesh with the corresponding transmission gears 15 on the transmission shaft 14, the relative positions of the two transmission gears 15 are fixed, thereby fixing the position of the receiving holes 1212 for mounting the two transmission gears 15.

[0047] Since the positions of two adjacent receiving holes 1212 are fixed, the two staggered bearing holes 1211 may have coaxially arranged bearing holes 1211 that are close to or far from the receiving hole 1212. In some embodiments, if the coaxially arranged bearing hole 1211 is too close to the receiving hole 1212, the coaxially arranged receiving hole 1212 and the bearing hole 1211 will at least partially overlap radially along the bearing hole 1211.

[0048] To prevent the coaxially arranged receiving hole 1212 from overlapping with the bearing hole 1211 and thus causing radial communication between them, the minimum diameter of the receiving hole 1212 in this embodiment is larger than the diameter of the bearing hole 1211. This arrangement separates the receiving hole 1212 from the bearing hole 1211, preventing communication between them and thus avoiding collisions and interference between the transmission gear 15 and the bearing 13 during assembly and operation. This is beneficial for the normal operation of the transmission gear 15 and the bearing 13.

[0049] In one embodiment, the bearing mounting portion 121 is provided with a first oil passage 1213, and the oil supply pipe in the gearbox 100 can spray lubricating oil into the first oil passage 1213. Specifically, in the same bearing mounting portion 121, the first oil passage 1213 communicates with the bearing hole 1211, and the first oil passage 1213 is adapted to deliver lubricating oil to the bearing 13 inside the bearing hole 1211. With this arrangement, the lubricating oil can lubricate the bearing 13 and the drive shaft 14, thereby improving the service life of the bearing 13 and the drive shaft 14. Secondly, the lubricating oil can also cool the bearing 13 and the drive shaft 14, thereby improving the heat dissipation effect of the gearbox 100.

[0050] like Figure 4 As shown, in one embodiment, the bearing mounting portion 121 is also provided with a second oil passage 1214, and the oil supply pipe in the gearbox 100 can spray lubricating oil into the second oil passage 1214. Specifically, in the same bearing mounting portion 121, the second oil passage 1214 communicates with the receiving hole 1212, and the second oil passage 1214 is adapted to deliver lubricating oil to the transmission gear 15. With this arrangement, the lubricating oil can lubricate the transmission gear 15 and the transmission shaft 14, thereby improving the service life of the transmission gear 15 and the transmission shaft 14. Secondly, the lubricating oil can also cool the transmission gear 15 and the transmission shaft 14, further improving the heat dissipation effect of the gearbox 100.

[0051] In one implementation, at least two bearing holes 1211 have different depths along their respective axial directions. This arrangement can meet the assembly requirements of bearings 13 with different thicknesses, thereby improving the versatility of the bearing housing 12.

[0052] In one implementation, at least two bearing holes 1211 have different diameters. This arrangement can meet the assembly requirements of bearings 13 with different diameters and further improve the versatility of the bearing housing 12.

[0053] like Figure 5 and Figure 6As shown, in one embodiment, the connecting portion 122 is provided at least partially around all bearing mounting portions 121. This arrangement allows each bearing mounting portion 121 to be connected to the housing 11 via the connecting portion 122, thereby improving the connection stability between the bearing housing 12 and the housing 11.

[0054] Specifically, the connecting part 122 has a plurality of connecting holes 1221. The connecting holes 1221 are detachably connected to the housing 11. In some embodiments, bolts can be installed in the connecting holes 1221 so that the bearing seat 12 and the housing 11 are fixedly connected by bolts, thereby improving the connection stability between the bearing seat 12 and the housing 11. Furthermore, the bearing seat 12 can be separated from the housing 11 by removing the bolts, which facilitates the maintenance and replacement of the bearing seat 12.

[0055] like Figure 5 and Figure 6 As shown, in one embodiment, each bearing hole 1211 has multiple weight-reducing holes 1215 on its sidewall along the circumference of the corresponding bearing hole 1211. This arrangement can reduce the overall weight of the bearing housing 12, making the gearbox 100 lighter.

[0056] like Figure 1 and Figure 7 As shown, this application provides an all-terrain vehicle 200, which includes a frame 21, a running system 22, a suspension system 23, a powertrain 24, and a reduction gearbox 100.

[0057] The frame 21 serves as the basic framework of the all-terrain vehicle 200, supporting the running gear 22, suspension system 23, powertrain 24, and reduction gearbox 100. The running gear 22 is at least partially located under the frame 21, and the suspension system 23 connects the running gear 22 to the frame 21. The reduction gearbox 100 connects the powertrain 24 and the running gear 22, enabling the powertrain 24 to drive the running gear 22 to move, thereby driving the all-terrain vehicle 200.

[0058] It should be noted that the gearbox 100 of this application can also be installed in other vehicles that require the use of the gearbox 100, such as motorcycles. This application does not limit the application scenarios of the gearbox 100.

[0059] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A gearbox, comprising: case; A bearing housing, which is detachably connected to the housing; The bearing is mounted in the bearing housing; A drive shaft, which is rotatably connected to a bearing housing via the bearing; Its features are, At least two bearings and at least two drive shafts are provided. The bearing housing includes a connecting part and at least two integrally formed bearing mounting parts. Each bearing mounting part has a bearing hole, and one bearing is installed in each bearing hole. The axes of at least two bearing holes do not coincide. The connecting part is detachably connected to the housing. The connecting part is provided with a positioning hole. The gearbox also includes a positioning member that passes through the positioning hole and the housing to position the bearing seat and the housing.

2. The gearbox according to claim 1, characterized in that, The axes of at least two of the bearing holes are substantially parallel.

3. The gearbox according to claim 1 or 2, characterized in that, The bearing mounting part is also provided with a receiving hole. In the same bearing mounting part, the receiving hole and the bearing hole are connected in the axial direction of the bearing hole. The minimum diameter of the receiving hole is greater than or equal to the diameter of the bearing hole. A transmission gear is connected to the transmission shaft, and the transmission gear can rotate in the receiving hole.

4. The gearbox according to claim 3, characterized in that, The receiving holes on two adjacent bearing mounting portions are connected radially in the bearing holes so that the transmission gears on two adjacent transmission shafts can mesh and transmit power.

5. The gearbox according to claim 3, characterized in that, The receiving hole and the bearing hole at least partially overlap radially along the bearing hole, and the minimum diameter of the receiving hole is larger than the diameter of the bearing hole.

6. The gearbox according to claim 3, characterized in that, The bearing mounting part is provided with a first oil passage hole. In the same bearing mounting part, the first oil passage hole communicates with the bearing hole. The first oil passage hole is adapted to deliver lubricating oil to the bearing in the bearing hole.

7. The gearbox according to claim 6, characterized in that, The bearing mounting part is also provided with a second oil passage hole. In the same bearing mounting part, the second oil passage hole is connected to the receiving hole. The second oil passage hole is adapted to deliver lubricating oil to the transmission gear.

8. The gearbox according to claim 1 or 2, characterized in that, At least two of the bearing holes have different depths along their respective axial directions; at least two of the bearing holes have different diameters; and at least two of the bearing holes do not overlap at least partially in any of the bearing hole radial directions.

9. The gearbox according to claim 1 or 2, characterized in that, The connecting portion is at least partially arranged around all the bearing mounting portions, and the connecting portion has a plurality of connecting holes that can be detachably connected to the housing.

10. An all-terrain vehicle, comprising: Frame; A walking system, at least partially located below the vehicle frame; A suspension system that connects the running gear to the vehicle frame; The powertrain is supported by the aforementioned chassis; Its features are, The all-terrain vehicle further includes a reduction gearbox as described in any one of claims 1 to 9, the reduction gearbox drivingly connecting the powertrain and the walking system.

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