A 10-speed mechanical automatic transmission and a shift method

Abstract

The application belongs to the technical field of gearboxes, and relates to a 10-gear mechanical automatic gearbox and a gear shifting method. A first shaft is located in a front auxiliary gearbox, and a second shaft is located in a main gearbox. In the main gearbox, gear arrangement order adopts an axial arrangement mode of three gears, two gears, four gears, one gear and a reverse gear, instead of a reverse arrangement mode of four gears, three gears, two gears, one gear and a reverse gear. The first gear and the second gear are not arranged adjacently, the problem of an excessively long axial size of an intermediate shaft caused by an additional tool space required for processing adjacent gears by a hobbing cutter is solved, the rear auxiliary gearbox is cancelled on the premise of maintaining the 10-gear shifting function, the transmission gap of the 10-gear gearbox is reduced, a rear cover shell can be reduced when a parallel buffer is matched, the length of the gearbox is shortened, the overall structure of the gearbox is more compact, the weight of the gearbox is reduced, vehicle arrangement is facilitated, and fuel consumption is reduced.

Description

Technical Field

[0001] This invention belongs to the field of transmission technology and relates to a 10-speed mechanical automatic transmission and a shifting method. Background Technology

[0002] With the development and upgrading of the passenger transport industry, higher requirements have been placed on the comfort and economy of tour buses. As a result, the transmission system is also shifting from manual transmissions to automatic transmissions. Although AT transmissions offer good comfort, they have high fuel consumption, which does not meet the industry's requirements for cost reduction and efficiency improvement, thus limiting their promotion. AMT transmissions, on the other hand, consist of multiple pairs of gears as the main transmission component. They have the advantages of high efficiency and high reliability. Furthermore, with the increasing maturity of AMT shift control technology, they have achieved a level of comfort comparable to AT transmissions.

[0003] In bus AMT transmissions, the 10-speed transmission generally consists of a main gearbox and an auxiliary gearbox, forming a 5x2 structure. Due to the presence of the auxiliary gearbox, the transmission clearance of this type of transmission is too large, which can generate significant noise under certain operating conditions. Summary of the Invention

[0004] The purpose of this invention is to solve the problem in the prior art that the presence of the auxiliary gearbox leads to excessive transmission clearance in the entire transmission, resulting in significant noise under certain operating conditions. This invention provides a 10-speed mechanical automatic transmission and a shifting method.

[0005] To achieve the above objectives, the present invention employs the following technical solution: A 10-speed mechanical automatic transmission includes a first shaft and a second shaft arranged sequentially from the input end to the output end. Parallel intermediate shafts are respectively arranged on both sides of the first shaft and the second shaft. The first shaft is located in the front auxiliary gearbox, and the second shaft is located in the main gearbox. A first-shaft speed-distributing gear and a first-shaft gear are sequentially arranged axially on the first shaft. An intermediate shaft speed-distributing gear, an intermediate shaft transmission gear, an intermediate shaft third gear, an intermediate shaft second gear, an intermediate shaft fourth gear, an intermediate shaft first gear, and an intermediate shaft reverse gear are sequentially arranged axially on the intermediate shaft. The first-shaft speed-distributing gear meshes with the intermediate shaft speed-distributing gear, and the first-shaft gear meshes with the intermediate shaft transmission gear. The two shafts are axially arranged with a third gear, a second gear, a fourth gear, and a first gear that mesh with the gears on the intermediate shaft. A reverse gear and a shift sleeve are arranged on the two shafts. The shift sleeve moves along the two shafts to the corresponding position according to the gear switching.

[0006] A further improvement of the present invention is that: The inner cavity of the shaft gear is provided with a bearing support plate, which is distributed circumferentially along the inner wall of the shaft gear, and thrust bearings are installed on both sides of the bearing support plate.

[0007] The inner cavity of the gear and the bearing support plate are an integral structure.

[0008] The third gear is provided with a third- and fifth gear sliding sleeve on the side near the first gear, the second- and fourth gear sliding sleeves are provided between the second gear and the fourth gear, and a reverse gear sliding sleeve is provided between the first gear and the reverse gear.

[0009] The retarder driven gear, the odometer rotor, and the flange are arranged sequentially on the side of the reverse gear away from the reverse gear sleeve. The intermediate shaft is provided with an intermediate shaft reverse gear, and one side of the intermediate shaft reverse gear meshes with a reverse gear intermediate wheel.

[0010] A front and auxiliary gearbox synchronizer is provided between the primary shaft speed-dividing gear and the primary shaft gear.

[0011] A brake is installed at one end of an intermediate shaft, and an oil pump drive interface is installed at the other end of an intermediate shaft. Both the brake and the oil pump drive interface are located at the ends of the intermediate shafts near the intermediate shaft speed divider gear.

[0012] The intermediate shaft gear, intermediate shaft drive gear, intermediate shaft third gear, and intermediate shaft fourth gear are interference-fitted with the intermediate shaft, and connecting pins are installed inside the intermediate shaft gear, intermediate shaft drive gear, intermediate shaft third gear, and intermediate shaft fourth gear.

[0013] An intermediate shaft speed sensor is installed in the front auxiliary housing, and an output shaft speed sensor is installed in the main housing.

[0014] A shifting method for a 10-speed mechanical automatic transmission includes the following steps: When in first gear, the first shaft transmits power to the intermediate shaft through the first shaft speed-distributing gear and the intermediate shaft speed-distributing gear. The intermediate shaft drives the intermediate shaft first gear to rotate synchronously. The intermediate shaft first gear transmits power to the second shaft through the first gear, and the second shaft transmits power to the flange. When in second gear, the first shaft transmits power to the intermediate shaft through the first shaft gear and the intermediate shaft transmission gear. The intermediate shaft drives the intermediate shaft first gear to rotate synchronously. The intermediate shaft first gear transmits power to the second shaft through the first gear, and the second shaft transmits power to the flange. When in third gear, the first shaft transmits power to the intermediate shaft through the first shaft speed-distributing gear and the intermediate shaft speed-distributing gear. The intermediate shaft drives the intermediate shaft second gear to rotate synchronously. The intermediate shaft second gear transmits power to the second shaft through the second gear, and the second shaft transmits power to the flange. When in fourth gear, the first shaft transmits power to the intermediate shaft through the first shaft gear and the intermediate shaft transmission gear. The intermediate shaft drives the intermediate shaft second gear to rotate synchronously. The intermediate shaft second gear transmits power to the second shaft through the second gear, and the second shaft transmits power to the flange. When in fifth gear, the first shaft transmits power to the intermediate shaft through the first shaft speed-distributing gear and the intermediate shaft speed-distributing gear. The intermediate shaft drives the intermediate shaft third gear to rotate synchronously. The intermediate shaft third gear transmits power to the second shaft through the third gear, and the second shaft transmits power to the flange. When in sixth gear, the first shaft transmits power to the intermediate shaft through the first shaft gear and the intermediate shaft transmission gear. The intermediate shaft drives the intermediate shaft third gear to rotate synchronously. The intermediate shaft third gear transmits power to the second shaft through the third gear, and the second shaft transmits power to the flange. When in seventh gear, the first shaft transmits power to the intermediate shaft through the first shaft speed-distribution gear and the intermediate shaft speed-distribution gear. The intermediate shaft drives the intermediate shaft fourth gear to rotate synchronously. The intermediate shaft fourth gear transmits power to the second shaft through the fourth gear, and the second shaft transmits power to the flange. When in eighth gear, the first shaft transmits power to the intermediate shaft through the first shaft gear and the intermediate shaft transmission gear. The intermediate shaft drives the intermediate shaft fourth gear to rotate synchronously. The intermediate shaft fourth gear transmits power to the second shaft through the fourth gear. The second shaft transmits power to the flange. When in ninth gear, the first shaft transmits power to the intermediate shaft through the first shaft speed-distributing gear and the intermediate shaft speed-distributing gear. The intermediate shaft drives the intermediate shaft transmission gear to rotate synchronously. The intermediate shaft transmission gear transmits power to the second shaft through the first shaft gear. The second shaft then transmits power to the flange. When in tenth gear, the first shaft transmits power to the second shaft through the first shaft gear, and the second shaft transmits power to the flange; In reverse gear, the first shaft transmits power to the intermediate shaft through the first shaft speed-distributing gear and the intermediate shaft speed-distributing gear. The intermediate shaft drives the intermediate shaft reverse gear to rotate synchronously. The intermediate shaft reverse gear drives the reverse gear interlocking wheel to rotate. The reverse gear interlocking wheel transmits power to the second shaft through the reverse gear. The second shaft transmits power to the flange.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a 10-speed mechanical automatic transmission. One shaft is located in the front auxiliary gearbox, and the second shaft is located in the main gearbox. The gears in the main gearbox are arranged axially in the order of third gear, second gear, fourth gear, first gear, and reverse gear, instead of the traditional reverse arrangement of fourth gear, third gear, second gear, first gear, and reverse gear. This avoids placing the first gear and second gear adjacent to each other, and solves the problem of excessive axial length of the intermediate shaft caused by the need for extra tool space when machining adjacent gears with a hob. While maintaining the 10-speed transmission function, the rear auxiliary gearbox is eliminated, reducing the transmission clearance of the 10-speed transmission. When matching a parallel retarder, a section of the rear cover housing can be reduced, thereby shortening the length of the transmission and making the overall structure of the transmission more compact, reducing the weight of the transmission, facilitating vehicle layout, and reducing fuel consumption.

[0016] Furthermore, in this embodiment of the invention, the internal cavity structure of the gear shaft is improved by setting a bearing support plate distributed circumferentially along the inner wall and installing thrust bearings on both sides of the bearing support plate, thereby eliminating the original support plate parts and fixing springs, reducing the types of parts and lowering costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a simplified structural diagram of a 10-speed mechanical automatic transmission disclosed in an embodiment of the present invention; Figure 2 This is a structural diagram of the intermediate shaft assembly of a 10-speed mechanical automatic transmission disclosed in an embodiment of the present invention; Figure 3 This is a structural diagram of the intermediate shaft of a 10-speed mechanical automatic transmission disclosed in an embodiment of the present invention; Figure 4 This is a structural diagram of a single-shaft gear of a 10-speed mechanical automatic transmission disclosed in an embodiment of the present invention.

[0019] Wherein: 1-Shaft 1; 2-Shaft 1 speed divider gear; 3-Front auxiliary gearbox synchronizer; 4-Shaft 1 gear; 5-Intermediate shaft speed divider gear; 6-Intermediate shaft; 7-Intermediate shaft drive gear; 8-Intermediate shaft third gear; 9-Intermediate shaft second gear; 10-Intermediate shaft fourth gear; 11-Intermediate shaft first gear; 12-Intermediate shaft reverse gear; 13-Reverse gear intermediary wheel; 14-Odometer rotor; 15-Flange; 16-Retarder driven gear; 17 - Reverse gear; 18 - First reverse gear sleeve; 19 - First gear; 20 - Fourth gear; 21 - Second and fourth gear sleeves; 22 - Second gear; 23 - Second shaft; 24 - Third gear; 25 - Third and fifth gear sleeves; 26 - Thrust bearing; 27 - Brake; 28 - Oil pump drive interface; 29 - Connecting pin; 30 - Intermediate shaft speed sensor; 31 - Output shaft speed sensor; 32 - Front auxiliary box; 33 - Main box; 34 - Bearing support plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 1 This invention discloses a 10-speed mechanical automatic transmission, which adopts a 2x5 front auxiliary gearbox and main gearbox structure. Compared with the 5x2 main gearbox and auxiliary gearbox structure, the transmission clearance can be significantly reduced and the shifting comfort can be improved.

[0027] The 10-speed mechanical automatic transmission disclosed in this invention includes a primary shaft 1 and a secondary shaft 23 arranged sequentially from the input end to the output end; a primary shaft gear 2 and a primary shaft gear 4 are loosely fitted on the primary shaft 1; a third gear 24, a second gear 22, a fourth gear 20, a first gear 19, and a reverse gear 17 are loosely fitted on the secondary shaft 23 in sequence; a retarder driven gear 16 is fixed to the end of the secondary shaft 23 via a spline. See also... Figures 2 to 3 This invention adopts a 2X5 structure and is a new two-stage 10-speed transmission with dual intermediate shafts and helical gears in the front auxiliary gearbox and main gearbox.

[0028] Furthermore, the gears of the main gearbox are not arranged in the reverse order of fourth gear, third gear, second gear, first gear and reverse gear, but are arranged in the order of third gear, second gear, fourth gear, first gear and reverse gear. This solves the problem of excessive axial length of the intermediate shaft caused by the hob cutting when the first gear and second gear are arranged adjacently.

[0029] The 10-speed mechanical automatic transmission disclosed in this invention will be further explained below with reference to embodiments.

[0030] Example 1 See Figure 1This invention discloses a 10-speed mechanical automatic transmission, comprising a primary shaft 1 and a secondary shaft 23 arranged sequentially from the input end to the output end. Parallel intermediate shafts 6 are respectively arranged on both sides of the primary shaft 1 and the secondary shaft 23. The primary shaft 1 is located within a front auxiliary gearbox 32, and the secondary shaft 23 is located within a main gearbox 33. A primary shaft distribution gear 2 and a primary shaft gear 4 are axially arranged sequentially on the primary shaft 1. An intermediate shaft distribution gear 5, an intermediate shaft transmission gear 7, an intermediate shaft third gear 8, and an intermediate shaft second gear are axially arranged sequentially on the intermediate shaft 6. 9. A fourth gear 10, a first gear 11, and a reverse gear 12 are provided on the intermediate shaft. The first-shaft gear 2 meshes with the intermediate shaft gear 5, and the first-shaft gear 4 meshes with the intermediate shaft transmission gear 7. The second shaft 23 is axially arranged with a third gear 24, a second gear 22, a fourth gear 20, and a first gear 19 that mesh with the gears on the intermediate shaft 6. The second shaft 23 is also provided with a reverse gear 17 and a shift sleeve. The shift sleeve moves axially along the second shaft 23 to the corresponding position according to the gear shift.

[0031] Furthermore, in this embodiment, the first shaft gear 2 and the first shaft gear 4 are loosely fitted on the first shaft 1, and a front and auxiliary gearbox synchronizer 3 is provided between the first shaft gear 2 and the first shaft gear 4. The third gear 24, the second gear 22, the fourth gear 20, the first gear 19 and the reverse gear 17 are loosely fitted on the second shaft 23 in sequence.

[0032] Furthermore, in this embodiment, a shift sleeve is provided on the second shaft 23. The shift sleeve moves axially along the second shaft 23 to the corresponding position according to the gear shift, specifically including: A reverse gear sleeve 18 is provided between the reverse gear 17 and the first gear 19 on the second shaft 23. A second and fourth gear sleeve 21 is provided between the fourth gear 20 and the second gear 22. A third and fifth gear sleeve 25 is provided on the side of the third gear 24 near the first shaft gear 4.

[0033] Furthermore, in this embodiment, the intermediate shaft gear 5, intermediate shaft drive gear 7, intermediate shaft third gear 8, intermediate shaft second gear 9, and intermediate shaft fourth gear 10 are all interference-fitted with the intermediate shaft 6, and connecting pins 29 are installed inside each of the intermediate shaft gear 5, intermediate shaft drive gear 7, intermediate shaft third gear 8, and intermediate shaft fourth gear 10. During the entire operation of the transmission, the intermediate shaft 6, intermediate shaft gear 5, intermediate shaft drive gear 7, intermediate shaft fourth gear 8, and intermediate shaft third gear 10 rotate at the same speed. The intermediate shaft 6 itself has an intermediate shaft reverse gear 12, an intermediate shaft first gear 11, an intermediate shaft second gear 9, and an oil pump drive interface 28, wherein the intermediate shaft reverse gear 12 engages with a reverse gear interlocking wheel 13 on one side.

[0034] Furthermore, in this embodiment, the intermediate shaft second gear 9 and intermediate shaft third gear 10 are staggered on the intermediate shaft 6, which solves the problem that the intermediate shaft 6 is too long because the intermediate shaft second gear 9 and intermediate shaft first gear 11 are adjacent during the machining process.

[0035] See Figure 4 Furthermore, in this embodiment, the primary gear 4 integrates the spline pad function of the thrust bearing. The thrust bearing 26 is installed separately, with rollers distributed on both sides of the bearing support plate 34 of the primary gear 4. Specifically, the bearing support plate 34 is set in the inner cavity of the primary gear 4. The bearing support plate 34 is distributed circumferentially along the inner wall of the primary gear 4. The thrust bearing 26 is installed on both sides of the bearing support plate 34. The original support plate parts and fixing springs are eliminated, reducing the types of parts and lowering the cost.

[0036] Furthermore, in this embodiment, the inner cavity of the gear 4 and the bearing support plate 34 are an integral structure.

[0037] Furthermore, in this embodiment, a flange 15 is installed at the rear end of the second shaft 23. The flange 15 is splinedly connected to the second shaft 23 and is used to connect to the vehicle drive shaft. Between the rear support bearing of the second shaft 23 and the flange 15, a retarder driven gear 16 and an odometer rotor 14 are installed. The retarder driven gear 16 is splinedly connected to the second shaft 23 and is used to mesh with the retarder gear to reduce speed in the entire transmission system. The odometer rotor 14 is used for mileage counting.

[0038] Furthermore, in this embodiment, a brake 27 is provided at one end of an intermediate shaft 6 for upshifting the transmission. An oil pump drive interface 28 is provided at the other end of an intermediate shaft 6 for driving the oil pump to provide lubrication for the transmission. Both the brake 27 and the oil pump drive interface 28 are located at the ends of the intermediate shaft 6 near the intermediate shaft distribution gear 5.

[0039] The transmission disclosed in this invention, through its structural design, can significantly reduce the transmission backlash of a 10-speed transmission, thereby improving the shifting comfort of the entire transmission system. Simultaneously, the new structure can reduce a section of the rear cover housing, thus shortening the transmission's length, reducing its weight, facilitating vehicle layout, and lowering fuel consumption.

[0040] Example 2 This embodiment discloses a shifting method for a 10-speed mechanical automatic transmission. The power transmission route includes: the engine's power is transmitted to the transmission's primary shaft 1 via a clutch; the front auxiliary gearbox synchronizer 3 on the primary shaft 1 engages with the primary shaft's distribution gear 2 or primary shaft's gear 4, thereby enabling the gears on the primary shaft 1 to mesh with the intermediate shaft's distribution gear 5 or intermediate shaft's transmission gear 7, thus driving the intermediate shaft 6 and its gears. When one gear on the primary shaft 1 is working, the other gear idles on the primary shaft 1; the gears on the intermediate shaft 6 are constantly meshed with the gears on the secondary shaft 23, so the gears on the secondary shaft 23 rotate simultaneously. The gears on the secondary shaft 23 are idle, so the secondary shaft 23 does not rotate when in neutral (i.e., the first reverse gear sleeve 18, second and fourth gear sleeves 21, and third and fifth gear sleeves 25 on the secondary shaft 23 are in the middle position). When the first and reverse gear sleeves 18, the second and fourth gear sleeves 21, and the third and fifth gear sleeves 25 on the second shaft move to a certain gear position and connect the second shaft gear with the second shaft 23 as one unit, the second shaft 23 begins to rotate, and the power is output to the flange 15.

[0041] The power transmission routes for each gear in the transmission disclosed in this embodiment will be described in detail below: When in first gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with the first shaft speed distribution gear 2, the first shaft speed distribution gear 2 rotates synchronously, the first shaft speed distribution gear 2 meshes with the intermediate shaft speed distribution gear 5, the intermediate shaft speed distribution gear 5 drives the intermediate shaft 6 to rotate, the intermediate shaft 6 drives the intermediate shaft first gear 11 to rotate synchronously, the first gear 11 meshes with the first gear 19, the first reverse gear sleeve 18 engages with the first gear 19, the second shaft 23 rotates synchronously, the second shaft 23 transmits power to the flange 15; When in second gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with shaft 4, shaft 4 rotates synchronously, shaft 4 meshes with intermediate shaft transmission gear 7, intermediate shaft transmission gear 7 drives intermediate shaft 6 to rotate, intermediate shaft 6 drives intermediate shaft first gear 11 to rotate synchronously, first gear 11 meshes with first gear 19, first reverse gear sleeve 18 engages with first gear 19, shaft 23 rotates synchronously, shaft 23 transmits power to flange 15; When in third gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with the first shaft speed distribution gear 2, the first shaft speed distribution gear 2 rotates synchronously, the first shaft speed distribution gear 2 meshes with the intermediate shaft speed distribution gear 5, the intermediate shaft speed distribution gear 5 drives the intermediate shaft 6 to rotate, the intermediate shaft 6 drives the intermediate shaft second gear 9 to rotate synchronously, the intermediate shaft second gear 9 meshes with the second gear 22, the second and fourth gear sliding sleeve 21 engages with the second gear 22, the second shaft 23 rotates synchronously, the second shaft 23 transmits power to the flange 15; When in fourth gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with shaft 4, shaft 4 rotates synchronously, shaft 4 meshes with intermediate shaft transmission gear 7, intermediate shaft transmission gear 7 drives intermediate shaft 6 to rotate, intermediate shaft 6 drives intermediate shaft second gear 9 to rotate synchronously, intermediate shaft second gear 9 meshes with second gear 22, second and fourth gear sliding sleeve 21 engages with second gear 22, second shaft 23 rotates synchronously, second shaft 23 transmits power to flange 15; When in fifth gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with the first shaft speed distribution gear 2, the first shaft speed distribution gear 2 rotates synchronously, the first shaft speed distribution gear 2 meshes with the intermediate shaft speed distribution gear 5, the intermediate shaft speed distribution gear 5 drives the intermediate shaft 6 to rotate, the intermediate shaft 6 drives the intermediate shaft third gear 8 to rotate synchronously, the intermediate shaft third gear 8 meshes with the third gear 24, the third and fifth gear sliding sleeve 25 engages with the third gear 2, the second shaft 23 rotates synchronously, the second shaft 23 transmits power to the flange 15; When in sixth gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with shaft 4, shaft 4 rotates synchronously, shaft 4 meshes with intermediate shaft transmission gear 7, intermediate shaft transmission gear 7 drives intermediate shaft 6 to rotate, intermediate shaft 6 drives intermediate shaft third gear 8 to rotate synchronously, intermediate shaft third gear 8 meshes with third gear 24, third and fifth gear sleeve 25 engages with third gear 2, shaft 23 rotates synchronously, shaft 23 transmits power to flange 15; When in seventh gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with the first shaft speed distribution gear 2, the first shaft speed distribution gear 2 rotates synchronously, the first shaft speed distribution gear 2 meshes with the intermediate shaft speed distribution gear 5, the intermediate shaft speed distribution gear 5 drives the intermediate shaft 6 to rotate, the intermediate shaft 6 drives the intermediate shaft fourth gear 10 to rotate synchronously, the intermediate shaft fourth gear 10 meshes with the fourth gear 20, the second and fourth gear sliding sleeve 21 engages with the fourth gear 20, the second shaft 23 rotates synchronously, the second shaft 23 transmits power to the flange 15; When in eighth gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with shaft 4, shaft 4 rotates synchronously, shaft 4 meshes with intermediate shaft transmission gear 7, intermediate shaft transmission gear 7 drives intermediate shaft 6 to rotate, intermediate shaft 6 drives intermediate shaft fourth gear 10 to rotate synchronously, intermediate shaft fourth gear 10 meshes with fourth gear 20, second and fourth gear sliding sleeve 21 engages with fourth gear 20, second shaft 23 rotates synchronously, second shaft 23 transmits power to flange 15; When in ninth gear: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with the first shaft speed distribution gear 2, the first shaft speed distribution gear 2 rotates synchronously, the first shaft speed distribution gear 2 meshes with the intermediate shaft speed distribution gear 5, the intermediate shaft speed distribution gear 5 drives the intermediate shaft 6 to rotate, the intermediate shaft 6 drives the intermediate shaft transmission gear 7 to rotate synchronously, the intermediate shaft transmission gear 7 meshes with the first shaft gear 4, the third and fifth gear sliding sleeve 25 engages with the first shaft gear 4, the second shaft 23 begins to rotate synchronously, the second shaft 23 transmits power to the flange 15; When in tenth gear: shaft 1 rotates, front auxiliary gearbox synchronizer 3 engages with shaft 4, shaft 4 rotates synchronously, third and fifth gear sliding sleeve 25 engages with shaft 4, second shaft 23 begins to rotate synchronously, second shaft 23 transmits power to flange 15. When reverse gear is engaged: Shaft 1 rotates, the front auxiliary gearbox synchronizer 3 engages with the shaft 2, the shaft 2 rotates synchronously, the shaft 2 meshes with the intermediate shaft gear 5, the intermediate shaft gear 5 drives the intermediate shaft 6 to rotate, the intermediate shaft 6 rotates and drives the intermediate shaft reverse gear 12 to rotate, one side of the intermediate shaft reverse gear 12 meshes with the reverse gear interlocking wheel 13, the reverse gear interlocking wheel 13 meshes with the reverse gear 17, the first reverse gear sleeve 18 engages with the reverse gear 17, the second shaft 23 begins to rotate synchronously, and the second shaft 23 transmits power to the flange 15.

[0042] The 10-speed mechanical automatic transmission disclosed in this invention has a 2x5 front auxiliary gearbox and main gearbox structure. Compared with the 5x2 10-speed transmission, the rear auxiliary gearbox is eliminated, reducing the transmission clearance of the 10-speed transmission. While matching the parallel retarder, a section of the rear cover housing can be reduced, thereby shortening the length of the transmission, reducing the weight of the transmission, facilitating vehicle layout, and reducing fuel consumption.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A 10-speed mechanical automatic transmission, characterized in that, It includes a first shaft (1) and a second shaft (23) arranged sequentially from the input end to the output end. Parallel intermediate shafts (6) are respectively arranged on both sides of the first shaft (1) and the second shaft (23). The first shaft (1) is located in the front auxiliary box (32), and the second shaft (23) is located in the main box (33). A first-shaft gear (2) and a first-shaft gear (4) are arranged axially in sequence on the first shaft (1). An intermediate shaft gear (5), an intermediate shaft transmission gear (7), an intermediate shaft third gear (8), an intermediate shaft second gear (9), an intermediate shaft fourth gear (10), an intermediate shaft first gear (11), and an intermediate shaft reverse gear (12) are arranged axially in sequence on the intermediate shaft (6). The first-shaft gear (2) meshes with the intermediate shaft gear (5), and the first-shaft gear (4) meshes with the intermediate shaft transmission gear (7). The second shaft (23) is axially arranged with a third gear (24), a second gear (22), a fourth gear (20) and a first gear (19) that mesh with the gears on the intermediate shaft (6); the second shaft (23) is also provided with a reverse gear (17) and a shift sleeve, which moves axially along the second shaft (23) to the corresponding position according to the gear switching.

2. The 10-speed mechanical automatic transmission according to claim 1, characterized in that, The inner cavity of the shaft gear (4) is provided with a bearing support plate (34), which is distributed circumferentially along the inner wall of the shaft gear (4). Thrust bearings (26) are installed on both sides of the bearing support plate (34).

3. A 10-speed mechanical automatic transmission according to claim 2, characterized in that, The inner cavity of the shaft gear (4) and the bearing support plate (34) are an integral structure.

4. A 10-speed mechanical automatic transmission according to claim 1, characterized in that, The third gear (24) is provided with a third-to-fifth gear sliding sleeve (25) on the side near the first gear (4), the second-to-fourth gear sliding sleeve (21) is provided between the second gear (22) and the fourth gear (20), and a reverse gear sliding sleeve (18) is provided between the first gear (19) and the reverse gear (17).

5. A 10-speed mechanical automatic transmission according to claim 4, characterized in that, The reverse gear (17) is provided with a retarder driven gear (16), an odometer rotor (14) and a flange (15) on the side away from the reverse gear sleeve (18). The intermediate shaft (6) is provided with an intermediate shaft reverse gear (12), and one side of the intermediate shaft reverse gear (12) meshes with a reverse gear intermediate wheel (13).

6. A 10-speed mechanical automatic transmission according to claim 1, characterized in that, A front and auxiliary gearbox synchronizer (3) is provided between the first shaft speed-dividing gear (2) and the first shaft gear (4).

7. A 10-speed mechanical automatic transmission according to claim 1, characterized in that, A brake (27) is provided at one end of an intermediate shaft (6), and an oil pump drive interface (28) is provided at the other end of an intermediate shaft (6). Both the brake (27) and the oil pump drive interface (28) are located at the end of the intermediate shaft (6) near the intermediate shaft speed divider gear (5).

8. A 10-speed mechanical automatic transmission according to claim 1, characterized in that, The intermediate shaft speed-dividing gear (5), intermediate shaft transmission gear (7), intermediate shaft third gear (8) and intermediate shaft fourth gear (10) are interference-fitted with the intermediate shaft (6), and connecting pins (29) are installed inside the intermediate shaft speed-dividing gear (5), intermediate shaft transmission gear (7), intermediate shaft third gear (8) and intermediate shaft fourth gear (10).

9. A 10-speed mechanical automatic transmission according to claim 1, characterized in that, An intermediate shaft speed sensor (30) is installed in the front auxiliary box (32), and an output shaft speed sensor (31) is installed in the main box (33).

10. A shifting method for a 10-speed mechanical automatic transmission, characterized in that, Includes the following steps: When in first gear, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft speed-distributing gear (2) and the intermediate shaft speed-distributing gear (5). The intermediate shaft (6) drives the intermediate shaft first gear (11) to rotate synchronously. The intermediate shaft first gear (11) transmits power to the second shaft (23) through the first gear (19). The second shaft (23) transmits power to the flange (15). When in second gear, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft gear (4) and the intermediate shaft transmission gear (7). The intermediate shaft (6) drives the intermediate shaft first gear gear (11) to rotate synchronously. The intermediate shaft first gear gear (11) transmits power to the second shaft (23) through the first gear gear (19). The second shaft (23) transmits power to the flange (15). When in third gear, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft speed-distributing gear (2) and the intermediate shaft speed-distributing gear (5). The intermediate shaft (6) drives the intermediate shaft second gear (9) to rotate synchronously. The intermediate shaft second gear (9) transmits power to the second shaft (23) through the second gear (22). The second shaft (23) transmits power to the flange (15). When in fourth gear, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft gear (4) and the intermediate shaft transmission gear (7). The intermediate shaft (6) drives the intermediate shaft second gear (9) to rotate synchronously. The intermediate shaft second gear (9) transmits power to the second shaft (23) through the second gear (22). The second shaft (23) transmits power to the flange (15). When in fifth gear, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft speed-distributing gear (2) and the intermediate shaft speed-distributing gear (5). The intermediate shaft (6) drives the intermediate shaft third gear (8) to rotate synchronously. The intermediate shaft third gear (8) transmits power to the second shaft (23) through the third gear (24). The second shaft (23) transmits power to the flange (15). When the sixth gear is engaged, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft gear (4) and the intermediate shaft transmission gear (7). The intermediate shaft (6) drives the intermediate shaft third gear (8) to rotate synchronously. The intermediate shaft third gear (8) transmits power to the second shaft (23) through the third gear (24). The second shaft (23) transmits power to the flange (15). When the seventh gear is engaged, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft speed distribution gear (2) and the intermediate shaft speed distribution gear (5). The intermediate shaft (6) drives the intermediate shaft fourth gear (10) to rotate synchronously. The intermediate shaft fourth gear (10) transmits power to the second shaft (23) through the fourth gear (20). The second shaft (23) transmits power to the flange (15). When the eighth gear is engaged, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft gear (4) and the intermediate shaft transmission gear (7). The intermediate shaft (6) drives the intermediate shaft fourth gear (10) to rotate synchronously. The intermediate shaft fourth gear (10) transmits power to the second shaft (23) through the fourth gear (20). The second shaft (23) transmits power to the flange (15). When the ninth gear is engaged, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft speed-distributing gear (2) and the intermediate shaft speed-distributing gear (5). The intermediate shaft (6) drives the intermediate shaft transmission gear (7) to rotate synchronously. The intermediate shaft transmission gear (7) transmits power to the second shaft (23) through the first shaft gear (4). The second shaft (23) transmits power to the flange (15). When in tenth gear, the first shaft (1) transmits power to the second shaft (23) through the first shaft gear (4), and the second shaft (23) transmits power to the flange (15). In reverse gear, the first shaft (1) transmits power to the intermediate shaft (6) through the first shaft speed-distributing gear (2) and the intermediate shaft speed-distributing gear (5). The intermediate shaft (6) drives the intermediate shaft reverse gear (12) to rotate synchronously. The intermediate shaft reverse gear (12) drives the reverse gear intermediate wheel (13) to rotate. The reverse gear intermediate wheel (13) transmits power to the second shaft (23) through the reverse gear (17). The second shaft (23) transmits power to the flange (15).

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