Double-intermediate-shaft gearbox and pure electric vehicle

Abstract

The utility model relates to the field of automobile gearboxes, in particular to a double-intermediate-shaft gearbox and a pure electric automobile, which comprise an input shaft, a gear shifting device, an output shaft, a planetary gear system and intermediate shafts, the two intermediate shafts are arranged on the two sides of the input shaft correspondingly and connected with the input shaft in a transmission mode. Meanwhile, the tail ends of the middle shafts on the two sides are connected with the main shaft in a transmission mode. And the gear shifting device is arranged on the main shaft. According to the scheme, the requirement for efficient and reliable operation of the pure electric heavy truck under the complex working condition can be met, and carbon emission can be effectively reduced while the vehicle performance is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile gearbox, specifically, a double intermediate shaft gearbox and pure electric vehicle. BACKGROUND

[0002] Pure electric heavy truck is widely concerned by the market for its zero emission, low noise and other advantages, but at the same time, it also faces a series of technical challenges.

[0003] Heavy truck due to its high load demand, complex working environment, resulting in its operation condition is more severe than ordinary vehicles. Frequent start, stop and driving under different loads make the power system of pure electric heavy truck, especially pure electric gearbox is under great test. The gearbox design of traditional fuel vehicle is not completely suitable for pure electric heavy truck, because the working characteristics of the latter are significantly different from the former. For example, the torque characteristics of the electric motor are different from the internal combustion engine, and a more flexible and reliable transmission system is needed to adapt to different load conditions and driving requirements. In addition, the working cycle of electric heavy truck is more frequent, which also puts higher requirements on the durability and reliability of its power system.

[0004] Therefore, in the prior art, how to design a pure electric gearbox that can meet the high-efficiency and reliable operation requirements of pure electric heavy truck under complex working conditions, and effectively reduce carbon emissions while ensuring vehicle performance, has become a problem to be solved. SUMMARY

[0005] The utility model aims at providing a double intermediate shaft gearbox device, which can meet the high-efficiency and reliable operation requirements of pure electric heavy truck under complex working conditions, and effectively reduce carbon emissions while ensuring vehicle performance.

[0006] Another purpose of the utility model is to provide a pure electric vehicle, which can meet the high-efficiency and reliable operation requirements of pure electric heavy truck under complex working conditions, and effectively reduce carbon emissions while ensuring vehicle performance.

[0007] The technical scheme of the utility model is realized as follows:

[0008] A double intermediate shaft gearbox, comprising an input shaft, a shift device, a main shaft, an output shaft and a planetary gear system, further comprising an intermediate shaft;

[0009] The intermediate shaft is provided with two, and is respectively arranged on the two sides of the input shaft and is respectively connected with the input shaft for transmission;

[0010] At the same time, the ends of the intermediate shaft on both sides are respectively connected with the main shaft for transmission;

[0011] The shift device is arranged on the main shaft.

[0012] Further, a first transmission gear is mounted on the input shaft, and a second transmission gear, a third transmission gear and a fourth transmission gear are mounted on each of the intermediate shafts from left to right.

[0013] The fifth transmission gear and the sixth transmission gear are sleeved on the main shaft from left to right.

[0014] The first transmission gear is in meshing connection with the second transmission gear, the second transmission gear and the third transmission gear are double-tooth structures, the third transmission gear is in meshing connection with the fifth transmission gear, and the fourth transmission gear is in meshing connection with the sixth transmission gear.

[0015] Further, the intermediate shafts are symmetrically distributed on opposite sides of the main shaft.

[0016] Further, the gear shifting device includes a first gear shifting device and a second gear shifting device.

[0017] The first gear shifting device and the second gear shifting device are respectively arranged on the main shaft, the first gear shifting device is located between the first transmission gear and the fifth transmission gear, the second gear shifting device is located between the fifth transmission gear and the sixth transmission gear, and the first transmission gear, the fifth transmission gear and the sixth transmission gear are respectively provided with spline combination teeth matched with the first gear shifting device and the second gear shifting device.

[0018] Further, the gear shifting device further includes a third gear shifting device.

[0019] The main shaft and the output shaft are provided with a planetary gear system, the planetary gear system includes a ring gear, a sun gear, a planet carrier, a planet wheel and a ring gear support, the sun gear is arranged at the rear end of the main shaft, the planet carrier is provided with a plurality of planet wheels, the rear end of the planet carrier is connected with the output shaft, and the third gear shifting device is arranged on the ring gear support.

[0020] Further, the first gear shifting device and the third gear shifting device each have three gears, and the second gear shifting device has two gears.

[0021] Further, the second transmission gear and the third transmission gear are in interference fit connection with the intermediate shafts.

[0022] Further, the fourth transmission gear and the intermediate shaft are an integrated gear shaft structure.

[0023] Further, the transmission is a pure electric transmission, and the input shaft is used for connecting the output end of a power motor.

[0024] A pure electric vehicle includes the double-intermediate-shaft transmission.

[0025] Compared with the prior art, the utility model has the advantages of:

[0026] The gearbox of the application adopts the structure of main gearbox double intermediate shaft and auxiliary gearbox planetary gear system, the power transmitted by the power device is divided into two intermediate shafts through the input shaft, then is transmitted to the planetary gear system after power convergence of the main shaft through the gear shifting device selecting different gears, and then the power is output from the output shaft to the rear axle, by adjusting the position of the gear shifting device, multiple forward gears with different speed ratios can be formed, the structure has large output torque, strong power and high reliability, can be widely used in the field of transmission, especially in the field of new energy heavy truck with harsh working conditions and high reliability, has broad application prospect and good practicability. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 It is a structural schematic diagram of the double intermediate shaft gearbox of the utility model.

[0029] In the drawings:

[0030] 1-Fifth transmission gear; 2-Main shaft; 3-First gear shifting device;

[0031] 4-Input shaft; 5-First transmission gear; 6-Second transmission gear;

[0032] 7-Third transmission gear; 8-Intermediate shaft; 9-Fourth transmission gear;

[0033] 10-Second gear shifting device; 11-Ring gear; 12-Planet wheel;

[0034] 13-Ring gear support; 14-Third gear shifting device; 15-Output flange;

[0035] 16-Output shaft; 17-Planet carrier; 18-Sun gear; 19-Sixth transmission gear. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0038] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0041] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] Some embodiments of the present application will be described in detail with reference to the drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0043] Embodiment 1

[0044] With reference to Figure 1 The present embodiment provides a double-intermediate-shaft gearbox, comprising an input shaft 4, a shifting device, a main shaft 2, an output shaft 16 and a planetary gear system, further comprising intermediate shafts 8;

[0045] The intermediate shafts 8 are provided in two, and are respectively arranged on both sides of the input shaft 4 and connected in transmission with the input shaft 4; the first end of the input shaft 4 is used for connecting the output end of a power device, the power device transmits power to the input shaft 4, and the input shaft 4 transmits power to the two intermediate shafts 8.

[0046] At the same time, the ends of the intermediate shafts 8 on both sides are respectively connected in transmission with the main shaft 2; the intermediate shafts 8 further transmit power to the main shaft 2.

[0047] The shifting device is arranged on the main shaft 2, and different gears are selected through the shifting device, and the power is transmitted to the planetary gear system after power convergence of the main shaft 2, and then the power is output from the output shaft 16 to the rear axle.

[0048] In the present embodiment, a first transmission gear 5 is mounted on the input shaft 4, and a second transmission gear 6, a third transmission gear 7 and a fourth transmission gear 9 are mounted on each intermediate shaft 8 in sequence from left to right;

[0049] A fifth transmission gear 1 and a sixth transmission gear 19 are sleeved on the main shaft 2 from left to right;

[0050] The first transmission gear 5 is in meshing connection with the second transmission gear 6, the second transmission gear 6 and the third transmission gear 7 are in double-tooth structure and can rotate synchronously, the third transmission gear 7 is in meshing connection with the fifth transmission gear 1, and the fourth transmission gear 9 is in meshing connection with the sixth transmission gear 19.

[0051] The power received by the input shaft 4 drives the second transmission gear 6 and the third transmission gear 7 to rotate through the first transmission gear 5, and further drives the rotation of the intermediate shaft 8, so that the input shaft 4 distributes power to the two intermediate shafts 8 under the action of the first transmission gear 5, the second transmission gear 6 and the third transmission gear 7; the intermediate shaft 8 further transmits power to the main shaft 2 through the third transmission gear 7 or the fourth transmission gear 9, specifically as follows:

[0052] In the embodiment, the intermediate shafts 8 are symmetrically distributed on opposite sides of the main shaft 2, that is, the two intermediate shafts 8 are symmetrically distributed about the input shaft 4. The gear shifting device comprises a first gear shifting device 3 and a second gear shifting device 10; the first gear shifting device 3 and the second gear shifting device 10 are respectively arranged on the main shaft 2, and the first gear shifting device 3 is located between the first transmission gear 5 and the fifth transmission gear 1, and the second gear shifting device 10 is located at the rear end of the sixth transmission gear 19, and the first transmission gear 5, the fifth transmission gear 1 and the sixth transmission gear 19 are respectively provided with spline combination teeth matched with the first gear shifting device 3 and the second gear shifting device 10, the first transmission gear 5 and the fifth transmission gear 1 can be shifted by matching the spline combination teeth with the first gear shifting device 3, and the sixth transmission gear 19 can be shifted by matching the spline combination teeth with the second gear shifting device 10.

[0053] The gear shifting device further comprises a third gear shifting device 14;

[0054] The main shaft 2 and the output shaft 16 are provided with a planetary gear system, which comprises a ring gear 11, a sun gear 18, a planet carrier 17, a plurality of planet gears 12 and a ring gear support 13, the sun gear 18 is arranged at the rear end of the main shaft 2, the planet carrier 17 is provided with a plurality of planet gears 12, the planet gears 12 are engaged with the sun gear 18, and the planet gears 12 rotate around the sun gear 18 while rotating in the ring gear 11, the rear end of the planet carrier 17 is connected with the output shaft 16, and the ring gear support 13 is used for supporting the ring gear 11, and the third gear shifting device 14 is arranged on the ring gear support 13. The rear end of the planet carrier 17 is connected with the output shaft 16 and the output flange 15.

[0055] In the embodiment, the first gear shifting device 3 and the third gear shifting device 14 each have three gears, and the second gear shifting device 10 has two gears. By adjusting the gears of the first gear shifting device 3, the second gear shifting device 10 and the third gear shifting device 14 respectively, six forward gears are formed, so that the structure has large output torque, strong power and high reliability, and can be widely used in the field of transmission, especially in the field of new energy heavy trucks with harsh working conditions and high reliability, and has wide application prospect and good practicability.

[0056] In the embodiment, the second transmission gear 6 and the third transmission gear 7 are connected with the intermediate shaft 8 by interference fit to realize fixation therebetween, and the fourth transmission gear 9 is an integrated gear shaft structure with the intermediate shaft 8.

[0057] In the embodiment, the double-intermediate-shaft transmission is preferably applied to a pure electric heavy truck transmission, that is, the double-intermediate-shaft transmission is a pure electric transmission, and a power motor is used as a power device, and the output end of the power motor is connected with the input shaft 4 for transmission.

[0058] The power of the power motor is transmitted to the first transmission gear 5 through the input shaft 4, then the power is evenly distributed to two second transmission gears 6, according to the positions of the first shift device 3 and the second shift device 10, different gears are selected to transmit the power to the main shaft 2 through the fourth transmission gear 9 and the sixth transmission gear 19, the third transmission gear 7 and the fifth transmission gear 1, the first transmission gear 5, respectively forming 1st gear, 2nd gear and 3rd gear, according to the position of the third shift device 14, respectively forming high gear area and low gear area, the gearbox forms six gears with different speed ratios, and the power is transmitted to the output flange 15 from the main shaft 2 in turn through the sun gear 18, the planet carrier 17 and the output shaft 16.

[0059] The double-intermediate-shaft 8 pure electric gearbox of the application can be widely used in the field of new energy transmission, especially in the field of new energy heavy trucks with harsh working conditions and high reliability, has a broad application prospect, is good in practicability, adopts the structure of the main box being the double-intermediate-shaft 8 and the auxiliary box being the planetary gear system, is strong in bearing capacity, is convenient to install, simple in structure and high in reliability.

[0060] Embodiment 2

[0061] A pure electric vehicle comprises the double-intermediate-shaft gearbox.

[0062] Among them, the pure electric vehicle is, for example, a pure electric heavy truck.

[0063] The beneficial effects of the technical scheme of the utility model are as follows:

[0064] The gearbox of the application adopts the structure of the main box being the double-intermediate-shaft 8 and the auxiliary box being the planetary gear system, the power transmitted by the power device is divided into two intermediate shafts 8 through the input shaft 4, then the power is transmitted to the planetary gear system after being selected by the shift device to form different gears and being converged on the main shaft 2, and then the power is output from the output shaft 16 to the rear axle, by adjusting the positions of the shift devices (the first shift device 3, the second shift device 10 and the third shift device 14), six forward gears with different speed ratios can be formed, the structure is large in output torque, strong in power and high in reliability, can be widely used in the field of transmission, especially in the field of new energy heavy trucks with harsh working conditions and high reliability, has a broad application prospect and is good in practicability.

[0065] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, rather than limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the utility model.

[0066] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double-intermediate shaft gearbox comprising an input shaft (4), a gear shift device, an output shaft (16), a main shaft (2) and a planetary gear system, characterized in that, Further comprising intermediate shafts (8); The intermediate shafts (8) are provided in two, and are respectively arranged on both sides of the input shaft (4) and are respectively connected in transmission with the input shaft (4); Meanwhile, the ends of the intermediate shafts (8) on both sides are respectively connected in transmission with the main shaft (2); The gear shifting device is arranged on the main shaft (2).

2. Double countershaft gearbox according to claim 1, characterized in that The first transmission gear (5) is mounted on the input shaft (4), and the second transmission gear (6), the third transmission gear (7) and the fourth transmission gear (9) are mounted on each intermediate shaft (8) from left to right in sequence; The fifth transmission gear (1) and the sixth transmission gear (19) are sleeved on the main shaft (2) from left to right; The first transmission gear (5) is connected in mesh with the second transmission gear (6), the second transmission gear (6) and the third transmission gear (7) are double-tooth structures, the third transmission gear (7) is connected in mesh with the fifth transmission gear (1), and the fourth transmission gear (9) is connected in mesh with the sixth transmission gear (19).

3. Double countershaft gearbox according to claim 2, characterized in that The intermediate shafts (8) are symmetrically distributed on opposite sides of the main shaft (2).

4. Double countershaft gearbox according to claim 3, characterized in that The gear shifting device comprises a first gear shifting device (3) and a second gear shifting device (10); The first gear shifting device (3) and the second gear shifting device (10) are respectively arranged on the main shaft (2), the first gear shifting device (3) is located between the first transmission gear (5) and the fifth transmission gear (1), the second gear shifting device (10) is located at the rear end of the sixth transmission gear (19), and the first transmission gear (5), the fifth transmission gear (1) and the sixth transmission gear (19) are respectively provided with spline combination teeth matched with the first gear shifting device (3) and the second gear shifting device (10).

5. Double countershaft gearbox according to claim 4, characterized in that The gear shifting device further comprises a third gear shifting device (14); A planetary gear system is arranged between the main shaft (2) and the output shaft (16), the planetary gear system comprises a ring gear (11), a sun gear (18), a planet carrier (17), a planet gear (12) and a ring gear support (13), the sun gear (18) is arranged at the rear end of the main shaft (2), the planet carrier (17) is provided with a plurality of planet gears (12), the rear end of the planet carrier (17) is connected with the output shaft (16), and the third gear shifting device (14) is arranged on the ring gear support (13).

6. Double countershaft gearbox according to claim 5, characterized in that The first gear shifting device (3) and the third gear shifting device (14) each have three gears, and the second gear shifting device (10) has two gears.

7. The double countershaft gearbox according to claim 2, characterized in that The second transmission gear (6) and the third transmission gear (7) are connected in interference fit with the intermediate shaft (8).

8. The double countershaft gearbox according to claim 2, characterized in that The fourth transmission gear (9) and the intermediate shaft (8) are an integrated gear shaft structure.

9. The double countershaft gearbox according to claim 1, characterized in that The gearbox is a pure electric gearbox, and the input shaft (4) is used for connecting the output end of a power motor.

10. A pure electric vehicle, characterized by The double-intermediate-shaft gearbox according to any one of claims 1-9 is provided.

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