A hybrid transmission system

Abstract

The application provides a hybrid gearbox transmission system, which has a large number of gears and ensures smooth and reliable operation of the whole vehicle during gear switching. The hybrid gearbox transmission system comprises a front sub-gearbox part, a main gearbox part, a rear sub-gearbox part, a first input shaft, a second input shaft and an output shaft comprising a main gearbox output shaft and a sub-gearbox output shaft. The second input shaft is a hollow input shaft, the second input shaft is located in the radial center area of the front sub-gearbox part, and a front sub-gearbox first-gear input gear, a front sub-gearbox synchronizer and a front sub-gearbox third-gear input gear are sleeved in the area corresponding to the front sub-gearbox part, the front sub-gearbox synchronizer is used for switching the front sub-gearbox first gear, the neutral gear and the third gear, and the input end of the second input shaft is externally connected with a TM motor. The first input shaft is inserted into the hollow area of the second input shaft, and the rear end of the first input shaft protrudes from the end of the second input shaft, and the rear end of the first input shaft is fixedly sleeved with a front sub-gearbox second-gear input gear.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gearbox transmission, in particular to a hybrid gearbox transmission system. BACKGROUND

[0002] The gearbox transmission structure of the power truck, the existing structure mostly only includes a main box and a sub-box, in actual transmission, the main box and the sub-box are only provided with two gear adjustments, so that the gear change of the gearbox is less, in the process of automobile gear shifting, the operation fluctuation is large when the gear is switched, so that the driving experience is poor, therefore, it is urgent to develop a gearbox transmission system with more gears and stable switching. SUMMARY

[0003] In view of the above problems, the present application provides a hybrid gearbox transmission system, which has more gears and ensures stable and reliable operation of the whole vehicle when the gears are switched.

[0004] A hybrid gearbox transmission system, characterized in that it comprises:

[0005] a front sub-box part;

[0006] a main box part;

[0007] a rear sub-box part;

[0008] a first input shaft;

[0009] a second input shaft;

[0010] and an output shaft comprising a main box output shaft and a sub-box output shaft;

[0011] The second input shaft is a hollow input shaft, a front sub-box one-gear input gear, a front sub-box synchronizer and a front sub-box three-gear input gear are sleeved in the area corresponding to the front sub-box part in the radial center area of the front sub-box part, the front sub-box synchronizer is used for switching the front sub-box one-gear, neutral gear and three-gear, and a TM motor is connected to the input end of the second input shaft;

[0012] The first input shaft is inserted into the hollow area of the second input shaft, and the rear end of the first input shaft protrudes from the end of the second input shaft, a front sub-box two-gear input gear is fixedly sleeved on the rear end of the first input shaft, the center of the end of the first input shaft is connected to the front end of the main box output shaft through a bearing, the first input shaft and the main box output shaft are coaxially arranged in front and back connection, a meshing sleeve is arranged on the rear end of the front sub-box two-gear input gear, the main box output shaft penetrates the radial center area of the main box part and extends into the rear sub-box part;

[0013] The input end of the first input shaft is sequentially connected to an IM motor, a clutch and an engine from rear to front.

[0014] The main box output shaft is sequentially sleeved with a main box direct gear and a second gear synchronizer, a main box second gear, a main box first gear, a main box first and reverse gear synchronizer, and a main box reverse gear from front to back corresponding to the main box part;

[0015] The rear sub-box is provided with a planetary gear assembly, and the planetary gear assembly further includes a high-low gear shifting assembly. The rear end of the planet carrier of the planetary gear assembly is fixedly connected to the sub-box output shaft at a radially central position. The high-low gear shifting assembly shifting ring is in a fixed position or a rotating state.

[0016] The front sub-box part and the main box part are provided with at least one set of intermediate shafts on the outer periphery corresponding to the first input shaft and the main box output shaft. The intermediate shafts are respectively fixedly sleeved with a front sub-box first gear intermediate transmission tooth, a front sub-box third gear intermediate transmission tooth, a front sub-box second gear intermediate transmission tooth, a main box second gear intermediate transmission tooth, a main box first gear transmission tooth, and a main box reverse gear transmission tooth.

[0017] The front sub-box first gear intermediate transmission tooth engages the front sub-box first gear input gear. The front sub-box third gear intermediate transmission tooth engages the front sub-box third gear input gear. The front sub-box second gear intermediate transmission tooth engages the front sub-box second gear input gear. The main box second gear intermediate transmission tooth engages the main box second gear. The main box first gear transmission tooth engages the main box first gear. The main box reverse gear transmission tooth engages the main box reverse gear through an idler gear.

[0018] It further has the following characteristics:

[0019] The planetary gear assembly specifically includes a sun gear, a ring gear, a connecting frame, a planet carrier, a fixed limiting frame, and a plurality of planet gears. The center of the fixed limiting frame is sleeved on the main box output shaft through a bearing, and the outer ring of the fixed limiting frame is fixed. The planet carrier is sleeved on the main box output shaft through a bearing. The sun gear is fixedly sleeved on the center of the planet carrier cavity. The planet carrier is surrounded by a plurality of planet gears. The radially inner end of the planet gear engages the sun gear. The radially outer end of the planet gear engages the ring gear. The ring gear is connected to the rear sub-box synchronizer through the connecting frame.

[0020] The rear end surface of the fixed limiting frame is surrounded by a first engagement sleeve, and the front end surface of the planet carrier is surrounded by a second engagement sleeve. The rear sub-box synchronizer axially moves to engage the first engagement sleeve or the second engagement sleeve. When the rear sub-box synchronizer engages the first engagement sleeve, the planetary gear assembly outputs in a low gear position. When the rear sub-box synchronizer engages the second engagement sleeve, the planetary gear assembly outputs in a high gear position.

[0021] When the rear sub-gearbox synchronizer moves axially, at least a part of the width region of the ring gear meshes with the radially outer position of the planetary gear;

[0022] The number of the intermediate shafts is two or three;

[0023] When the number of the intermediate shafts is two, the two intermediate shafts are arranged at the two side positions of the first input shaft respectively, so that the two intermediate shafts and the first input shaft are arranged in the same horizontal plane, so that the occupied height of the whole gearbox is relatively saved, and the transmission of the two intermediate shafts ensures stable and reliable transmission;

[0024] All the meshing gear structures are helical tooth grinding structures, which reduce noise and transmission error.

[0025] After the application is adopted, the gearbox is provided with a front sub-gearbox part, a main gearbox part and a rear sub-gearbox part along the axial direction, a front sub-gearbox synchronizer is arranged in the front sub-gearbox part to switch the TM motor power output gear position, two groups of main gearbox synchronizers are arranged in the main gearbox part to switch the gear position according to the requirement, when the front sub-gearbox second gear input gear is switched, the two input shafts are directly coupled with power and then directly transmit power to the main gearbox output shaft, which is a direct gear output; in the rear sub-gearbox part, the high and low gear shifting assembly is arranged in the planetary gear assembly, so that the rear sub-gearbox output shaft is shifted again after high and low gear shifting and then externally outputs power, which makes the number of gear positions large and ensures that the vehicle runs stably and reliably when the gear position is switched. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the embodiment of the application;

[0027] The names corresponding to the serial numbers in the figure are as follows:

[0028] The first input shaft 10, the front sub-gearbox second gear input gear 11, the bearing 12, the second input shaft 20, the front sub-gearbox first gear input gear 21, the front sub-gearbox synchronizer 22, the front sub-gearbox third gear input gear 23, the TM motor 30, the engine 40, the IM motor 50, the main gearbox output shaft 60, the main gearbox direct gear and second gear synchronizer 61, the main gearbox second gear 62, the main gearbox first gear 63, the main gearbox first gear and reverse gear synchronizer 64, the main gearbox reverse gear 65, the sub-gearbox output shaft 70, the clutch 80, the planetary gear assembly 90, the planetary carrier 91, the second meshing sleeve 911, the ring gear 92, the sun gear 93, the rear sub-gearbox synchronizer 94, the connecting carrier 95, the fixed limiting carrier 96, the first meshing sleeve 961, the planetary gear 97, the gearbox part 100, the front sub-gearbox part 101, the main gearbox part 102, the rear sub-gearbox part 103, the intermediate shaft 110, the front sub-gearbox first gear intermediate transmission gear 111, the front sub-gearbox third gear intermediate transmission gear 112, the front sub-gearbox second gear intermediate transmission gear 113, the main gearbox second gear intermediate transmission gear 114, the main gearbox first gear transmission gear 115, the main gearbox reverse gear transmission gear 116, the idler gear 120. DETAILED DESCRIPTION

[0029] A hybrid transmission system, see Figure 1 , comprising a box part 100, a first input shaft 10, a second input shaft 20, an output shaft, a TM motor 30, an engine 40, an IM motor 50;

[0030] The box part is divided into a front auxiliary box part 101, a main box part 102, and a rear auxiliary box part 103; the output shaft comprises a main box output shaft 60 and an auxiliary box output shaft 70;

[0031] The second input shaft 20 is a hollow input shaft, and the second input shaft 20 is located in the radial center area of the front auxiliary box part 101 and is sleeved with a front auxiliary box first-gear input gear 21, a front auxiliary box synchronizer 22, and a front auxiliary box third-gear input gear 23 in the area corresponding to the front auxiliary box part 101, the front auxiliary box synchronizer 22 is used for switching the front auxiliary box first-gear, neutral gear, and third-gear, and the input end of the second input shaft 20 is circumscribed with the TM motor 30;

[0032] The first input shaft 10 is inserted into the hollow area of the second input shaft 20, and the rear end of the first input shaft 10 protrudes from the end of the second input shaft 20, the rear end of the first input shaft 10 is sleeved with the front auxiliary box second-gear input gear 11, the center of the end of the first input shaft 10 is connected to the front end of the main box output shaft 60 through a bearing 12, the first input shaft 10 and the main box output shaft 60 are coaxially arranged in front and back connection, the rear end of the front auxiliary box second-gear input gear 11 is provided with a meshing sleeve, and the main box output shaft 60 penetrates the radial center area of the main box part 102 and extends into the rear auxiliary box part 103;

[0033] The input end of the first input shaft 10 is sequentially connected to the IM motor 50, the clutch 80, and the engine 40 from rear to front;

[0034] The main box output shaft 60 is sequentially sleeved with a main box direct-gear and second-gear synchronizer 61, a main box second-gear gear 62, a main box first-gear gear 63, a main box first-gear and reverse-gear synchronizer 64, and a main box reverse-gear gear 65 from front to rear corresponding to the main box part 102;

[0035] The rear auxiliary box part 103 is provided with a planetary gear assembly 90, the planetary gear assembly 90 further comprises a high-low gear shifting assembly, the rear end of the planet carrier 91 of the planetary gear assembly 90 is fixedly installed with the auxiliary box output shaft 70, and the high-low gear shifting assembly shifting ring 92 is in a fixed position or a rotating state.

[0036] In particular implementation, the planetary gear assembly 90 specifically includes a sun gear 93, a ring gear 92, a connecting frame 95, a planetary carrier 91, a fixed limiting frame 96, a plurality of planetary gears 97, the fixed limiting frame 96 is sleeved on the main case output shaft 60 through a bearing, and the outer ring of the fixed limiting frame 96 is fixed in position, the planetary carrier 91 is sleeved on the main case output shaft 60 through a bearing, the sun gear 93 is fixedly sleeved on the central position of the cavity of the planetary carrier 91, the planetary carrier 91 is circumferentially provided with a plurality of planetary gears 97, the radial inner end of the planetary gear 97 is engaged with the sun gear 93, the radial outer end of the planetary gear 97 is engaged with the ring gear 92, and the ring gear 92 is connected with the rear sub-gearbox synchronizer 94 through the connecting frame 95; the rear end surface of the fixed limiting frame 96 is circumferentially provided with a first engagement sleeve 961, the front end surface of the planetary carrier 91 is circumferentially provided with a second engagement sleeve 911, the rear sub-gearbox synchronizer 94 is axially moved to engage with the first engagement sleeve 961 or the second engagement sleeve 911, when the rear sub-gearbox synchronizer 94 engages with the first engagement sleeve 961, the planetary gear assembly 90 outputs in a low gear position, when the rear sub-gearbox synchronizer 94 engages with the second engagement sleeve 911, the planetary gear assembly 90 outputs in a high gear position; when the rear sub-gearbox synchronizer 94 is axially moved, at least a part of the width region of the ring gear 92 is engaged with the radial outer position of the planetary gear 97, so that the ring gear 92 and the planetary gear 97 are in engagement.

[0037] The outer periphery of the front sub-gearbox part 101 and the main case part 102 corresponding to the first input shaft 10 and the main case output shaft 60 is provided with at least one set of intermediate shafts 110, the intermediate shafts 110 are respectively fixedly sleeved with a front sub-gearbox first-gear intermediate transmission gear 111, a front sub-gearbox third-gear intermediate transmission gear 112, a front sub-gearbox second-gear intermediate transmission gear 113, a main case second-gear intermediate transmission gear 114, a main case first-gear transmission gear 115, and a main case reverse-gear transmission gear 116.

[0038] The front sub-gearbox first-gear intermediate transmission gear 111 engages with the front sub-gearbox first-gear input gear 21, the front sub-gearbox third-gear intermediate transmission gear 112 engages with the front sub-gearbox third-gear input gear 23, the front sub-gearbox second-gear intermediate transmission gear 113 engages with the front sub-gearbox second-gear input gear 11, the main case second-gear intermediate transmission gear 114 engages with the main case second-gear ring gear 62, the main case first-gear transmission gear 115 engages with the main case first-gear ring gear 63, and the main case reverse-gear transmission gear 116 engages with the main case reverse-gear ring gear 65 through an idler gear 120.

[0039] In particular implementation, the number of intermediate shafts 110 is two or three.

[0040] In particular implementation, as shown in the accompanying drawings, Figure 1The number of intermediate shafts 110 is two, and the two intermediate shafts 110 are arranged at the positions on both sides of the first input shaft 10, so that the two intermediate shafts 110 and the first input shaft 10 are arranged in the same horizontal plane, so that the occupied height of the whole gearbox is relatively saved, and the transmission of the two intermediate shafts 110 ensures stable and reliable transmission.

[0041] In specific implementation, all the meshing gear structures are helical tooth grinding structures, which reduce noise and transmission error.

[0042] The working principle is as follows:

[0043] The first input shaft is connected with the engine and the IM motor, and transmits power or coupled power;

[0044] The second input shaft is connected with the TM motor, and the second input end is provided with two gears, so that three mode power combinations of the front auxiliary gearbox are realized, and the power is not interrupted during gear shifting;

[0045] The rear auxiliary gearbox is provided with a two-gear planetary gear structure, which widens the low gear speed ratio, and the high gear is provided with a direct gear, so as to improve the transmission efficiency;

[0046] The main gearbox is provided with two forward gears, one direct gear and one reverse gear, which are combined with the three gears of the front auxiliary gearbox and the two gears of the rear auxiliary gearbox, so as to realize 18 forward gears and 6 reverse gears.

[0047] The beneficial effects are as follows:

[0048] Through the 7 groups of gears, 18 forward gears and 6 reverse gears are realized, the structure is compact, the power density is improved, the torque-to-inertia ratio is large, the speed ratio is wide, the speed ratio difference is small, and the power performance and economy of the hybrid vehicle are greatly improved;

[0049] The front auxiliary gearbox and the main gearbox adopt two intermediate shafts or three intermediate shafts, and the rear auxiliary gearbox adopts a large-torque planetary gear structure, so as to effectively improve the reliability of the bearing parts such as shafts, bearings and gears of the hybrid heavy truck gearbox;

[0050] The whole helical tooth and whole grinding tooth design reduces noise, reduces transmission error, improves the efficiency of the friction pair, the axial force of the helical gear is balanced, and the axial force is digested through the thrust bearing and the stress ring, so that the shell cover part no longer bears the axial force, the strength of the shell cover part is greatly improved, and the weight of the shell cover part and the gearbox assembly is reduced;

[0051] The internal circulation active lubrication precisely cools the friction pair, reduces the oil stirring loss of the gear, basically realizes dry oil pool, maximally improves the transmission efficiency, improves the fuel saving rate, the highest efficiency reaches 99.9%, and the average road standard efficiency is greater than 94%.

[0052] The front auxiliary gearbox realizes power uninterrupted gear shifting, the satellite map is predicted in advance to change the gear positions of the main gearbox and the rear auxiliary gearbox, and the driving controllability, safety, comfort and adaptability are improved.

[0053] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0054] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A hybrid transmission drivetrain system, characterized by, It includes: Front auxiliary box part; Main box part; Rear auxiliary box part; First input shaft; Second input shaft; And output shaft, including main box output shaft, auxiliary box output shaft; The second input shaft is a hollow input shaft, the second input shaft is located in the radial center area of the front auxiliary box part, and the front auxiliary box one gear, the front auxiliary box synchronizer, the front auxiliary box three gears are sleeved in the area corresponding to the front auxiliary box part, the front auxiliary box synchronizer is used for switching the front auxiliary box one gear, neutral gear, three gears, and the input end of the second input shaft is circumscribed by TM motor; The first input shaft is inserted into the hollow area of the second input shaft, and the rear end of the first input shaft is protruded from the end of the second input shaft, the rear end of the first input shaft is sleeved with the front auxiliary box two gears, the center of the end of the first input shaft is connected with the front end of the main box output shaft through a bearing, the first input shaft and the main box output shaft are coaxially arranged in front and back connection, the rear end of the front auxiliary box two gears is provided with a meshing sleeve, and the main box output shaft penetrates the radial center area of the main box part and extends into the rear auxiliary box part; The input end of the first input shaft is sequentially connected with IM motor, clutch and engine from rear to front; The main box output shaft is sequentially sleeved with main box direct gear and two gear synchronizer, main box two gear, main box one gear, main box one gear and reverse synchronizer, main box reverse gear from front to back corresponding to the main box part; The rear auxiliary box is provided with a planetary gear assembly, the planetary gear assembly further includes a high-low gear shifting assembly, the rear end of the planet carrier of the planetary gear assembly is fixedly connected with the auxiliary box output shaft, and the high-low gear shifting assembly shifting gear ring is in fixed position or rotating state; At least one set of intermediate shaft is arranged on the outer periphery of the front auxiliary box part and the main box part corresponding to the first input shaft and the main box output shaft, and the intermediate shaft is respectively sleeved with front auxiliary box one intermediate transmission gear, front auxiliary box three intermediate transmission gear, front auxiliary box two intermediate transmission gear, main box two intermediate transmission gear, main box one gear transmission gear and main box reverse gear transmission gear; The front auxiliary box one intermediate transmission gear meshes with the front auxiliary box one gear, the front auxiliary box three intermediate transmission gear meshes with the front auxiliary box three gears, the front auxiliary box two intermediate transmission gear meshes with the front auxiliary box two gears, the main box two intermediate transmission gear meshes with the main box two gears, the main box one gear transmission gear meshes with the main box one gear, and the main box reverse gear transmission gear meshes with the main box reverse gear through idler.

2. A hybrid transmission system as claimed in claim 1, characterized in that: The planetary gear assembly specifically comprises a sun gear, a ring gear, a connecting frame, a planet carrier, a fixed limiting frame, and a plurality of planet gears, the center of the fixed limiting frame is sleeved on the main box output shaft through a bearing, and the outer ring of the fixed limiting frame is fixed in position, the planet carrier is sleeved on the main box output shaft through a bearing, the sun gear is fixedly sleeved on the central position of the planet carrier cavity into which the main box output shaft is inserted, the planet carrier is surrounded by a plurality of planet gears, the radial inner end of the planet gear is engaged with the sun gear, the radial outer end of the planet gear is engaged with the ring gear, and the ring gear is connected with the rear auxiliary box synchronizer through the connecting frame.

3. A hybrid transmission system as claimed in claim 2, wherein: The rear end surface of the fixed limiting frame is surrounded by a first engagement sleeve, the front end surface of the planet carrier is surrounded by a second engagement sleeve, the rear auxiliary box synchronizer is axially moved to switch engagement with the first engagement sleeve or the second engagement sleeve, when the rear auxiliary box synchronizer is engaged with the first engagement sleeve, the planetary gear assembly outputs in a low gear position, and when the rear auxiliary box synchronizer is engaged with the second engagement sleeve, the planetary gear assembly outputs in a high gear position.

4. A hybrid transmission system as claimed in claim 1, characterized in that: The number of the intermediate shafts is two or three.

5. A hybrid transmission system as claimed in claim 4, wherein: When the number of the intermediate shafts is two, the two intermediate shafts are arranged at two side positions of the first input shaft, so that the two intermediate shafts and the first input shaft are arranged in the same horizontal plane.

6. A hybrid transmission system as claimed in claim 1 or 2, characterized in that: All the engagement gear structures are helical tooth gear structures.

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