CN112360934B - New energy pure electric commercial transmission - Google Patents

New energy pure electric commercial transmission Download PDF

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Publication number
CN112360934B
CN112360934B CN202011389405.0A CN202011389405A CN112360934B CN 112360934 B CN112360934 B CN 112360934B CN 202011389405 A CN202011389405 A CN 202011389405A CN 112360934 B CN112360934 B CN 112360934B
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CN
China
Prior art keywords
gear
shaft
output
input
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011389405.0A
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Chinese (zh)
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CN112360934A (en
Inventor
李磊
张�浩
杨海华
杨富双
单培顺
李翠连
张婷婷
孙慧敏
陈雪峰
陈兆丰
刘诗道
王�忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Lvkon Transmission S&T Co Ltd
Original Assignee
Suzhou Lvkon Transmission S&T Co Ltd
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Priority to CN202011389405.0A priority Critical patent/CN112360934B/en
Publication of CN112360934A publication Critical patent/CN112360934A/en
Application granted granted Critical
Publication of CN112360934B publication Critical patent/CN112360934B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
    • F16H3/091—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears including a single countershaft
    • F16H3/0915—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears including a single countershaft with coaxial input and output shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors actuators or related electrical control means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/304—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/32—Gear shift yokes, e.g. shift forks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02086—Measures for reducing size of gearbox, e.g. for creating a more compact transmission casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H2061/2876—Racks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors actuators or related electrical control means therefor
    • F16H2061/326—Actuators for range selection, i.e. actuators for controlling the range selector or the manual range valve in the transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/304—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force
    • F16H2063/3059—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by electrical or magnetic force using racks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/0021—Transmissions for multiple ratios specially adapted for electric vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0043—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising four forward speeds

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

The invention provides a new energy pure electric commercial transmission, wherein an input shaft and an output shaft of the transmission are coaxially arranged, so that the transmission is simple in structure and high in system efficiency, and meanwhile, a power takeoff mechanism is arranged, so that the requirements of power matching of a commercial vehicle on a transmission system are met. The transmission comprises a transmission body, wherein the transmission body comprises a front shell and a rear shell, a speed change cavity and a power takeoff cavity are formed after the front shell and the rear shell are assembled, an input shaft, an output shaft and a middle shaft are arranged in the speed change cavity, the input shaft and the output shaft are coaxially arranged, the input end of the input shaft protrudes outwards from the position of a corresponding input hole of the front shell, the output end of the output shaft protrudes outwards from the position of a corresponding output hole of the rear shell, an inwards concave shaft center hole is formed in the shaft center of the rear end face of the input shaft, the front end of the output shaft is positioned in the shaft center hole through a front end bearing, and a four-gear output gear is fixedly sleeved on the input shaft.

Description

New energy pure electric commercial transmission
Technical Field
The invention relates to the technical field of transmission structures, in particular to a new energy pure electric commercial transmission.
Background
The prior transmission of the pure electric automobile generally comprises a main box and an auxiliary box, wherein the auxiliary box is used for installing a power takeoff structure, an input shaft, at least one intermediate shaft and an output shaft which are mutually arranged in parallel are arranged in the main box, and the pure electric automobile is required to be provided with a relatively large battery installation space, so that the prior transmission occupies a large space and does not utilize the arrangement of batteries and an electric system.
Disclosure of Invention
Aiming at the problems, the invention provides a new energy pure electric commercial transmission, wherein an input shaft and an output shaft of the new energy pure electric commercial transmission are coaxially arranged, so that the new energy pure electric commercial transmission is simple in structure and high in system efficiency, and meanwhile, a power takeoff mechanism is installed, so that the requirements of power matching of a commercial vehicle on a transmission of a transmission system are met.
A new forms of energy pure electric commercial transmission, its characterized in that: the transmission comprises a transmission body, the transmission body comprises a front shell and a rear shell, a speed change cavity and a power takeoff cavity are formed after the front shell and the rear shell are assembled, an input shaft, an output shaft and a middle shaft are arranged in the speed change cavity, the input shaft and the output shaft are coaxially arranged, the input end of the input shaft protrudes outwards from the position of a corresponding input hole of the front shell, the output end of the output shaft protrudes outwards from the position of a corresponding output hole of the rear shell, the center of a rear end surface shaft of the input shaft is provided with an inwards concave shaft center hole, the front end of the output shaft is positioned in the shaft center hole through a front end bearing, a four-gear output gear is fixedly sleeved on the input shaft, a three-gear output gear, a two-gear output gear and a first-gear output gear are sleeved on the output shaft from the front shell to the axial length direction of the rear shell in sequence through bearings, the axial region between the four-gear output gear and the three-gear output gear is sleeved with a three-four-gear output meshing sleeve, corresponding sides of the four-gear output gear and the three-gear output gear are fixedly sleeved with corresponding meshing gear rings respectively, the axial region between the two-gear output gear and the first-gear output gear is sleeved with a two-gear output meshing sleeve, corresponding sides of the two-gear output gear and the first-gear output gear are fixedly sleeved with corresponding meshing gear rings respectively, the upper cavities of the input shaft and the output shaft are also provided with a three-four-gear shifting fork shaft and a two-gear shifting fork shaft which are coaxially arranged, the three-four-gear shifting fork shaft and the two-gear shifting fork shaft are coaxially and limitedly connected through a linear spring, the three-four-gear shifting fork shaft is provided with a two-gear shifting fork corresponding to the driving groove position of the three-four-gear output meshing sleeve, the friction parts of the two shifting fork shafts corresponding to the front shell and the rear shell are respectively provided with a shifting fork shaft bushing, a normally meshed gear, an intermediate shaft third gear, an intermediate shaft second gear and an intermediate shaft first gear are fixedly sleeved on the intermediate shaft in sequence along the axial direction, the normally meshed gear is in meshed connection with the four-gear transmission gear, the intermediate shaft third gear is in meshed connection with the three-gear output gear, the intermediate shaft second gear is in meshed connection with the two-gear output gear, the intermediate shaft first gear is in meshed connection with the first-gear output gear, a power takeoff input gear and a power takeoff output shaft are arranged in a power takeoff cavity, and a transmission gear is fixedly sleeved on the power takeoff output shaft, and the power takeoff input gear is respectively in meshed connection with the intermediate shaft third gear and the transmission gear.
It is further characterized by:
the front end cover of the front shell, which corresponds to the input hole, is provided with an input shaft bearing cover, the positioning hole of the input shaft bearing cover is provided with an input shaft oil seal, the position of the input shaft, which corresponds to the input hole, is sleeved with an input shaft bearing, and the part of the input shaft, which is protruded forward of the input shaft bearing cover, is used for being externally connected with a motor;
an output shaft bearing cover is arranged on a rear end cover of the rear shell, which corresponds to the output hole, an output shaft oil seal is arranged on a positioning hole of the output shaft bearing cover, an output shaft bearing is sleeved at a position of the output shaft, which corresponds to the output hole, and an output flange is fixedly arranged at the rear end of the output shaft, which protrudes outwards from the output shaft bearing cover;
The position of the intermediate shaft relative to the rear end cover is backward convex, and an intermediate shaft rear bearing cover is covered and installed, so that convenience and rapidness in maintenance are ensured;
The three-four shift fork shaft and the two-shift fork shaft are respectively provided with a rack structure in the length direction, and an external gear shifting mechanism is meshed with the rack structures through a transmission gear;
One side of the integral shifting fork shaft formed by the three-gear shifting fork shaft and the two-gear shifting fork shaft is provided with an inwards concave locking hole, one side of the shifting fork shaft guide hole of the rear shell is provided with a locking guide hole, a locking ball spring with a steel ball is placed in the locking guide hole, the outer end of the locking ball spring is packaged through a locking hole bolt, and the steel ball is positioned in the inwards concave locking hole in a locking state, so that the gear position is ensured to be reliable in a neutral state.
After the invention is adopted, four pairs of gears are used to realize four gears, the coaxial arrangement structure of the input shaft and the output shaft is adopted, the whole transmission is small in size, the friction parts of the shifting fork shaft, the front shell and the rear shell are respectively provided with a shifting fork shaft bushing, the friction coefficient is reduced, the gear shifting damping is reduced, the wear resistance is increased, and meanwhile, the rotation speed difference of the gear to be shifted by the meshing sleeve is adjusted by controlling the rotation speed of the driving motor, so that gear shifting without rotation speed difference or gear shifting with small rotation speed difference is realized; compared with the hydraulic control gear shifting of the traditional vehicle, the invention is simplified into the meshing sleeve, so that the structure is simpler, the performance is more reliable, and meanwhile, the side part of the intermediate shaft is connected with the power takeoff structure, thereby meeting the power taking requirement in the running process of part of the commercial vehicle; in conclusion, the two-stage four-gear transmission is adopted, so that the structure is simpler, the transmission efficiency is higher, the power performance is better, and the after-sales maintenance cost is less.
Drawings
FIG. 1 is a schematic cross-sectional view of the front view of the present invention;
The names corresponding to the serial numbers in the figures are as follows:
The transmission device comprises a front shell 1, a rear shell 2, a speed changing cavity 3, a power takeoff cavity 4, an input shaft 5, an output shaft 6, an intermediate shaft 7, a front end bearing 8, a four-gear output gear 9, a three-gear output gear 10, a two-gear output gear 11, a first-gear output gear 12, a three-four-gear output engagement sleeve 13, an engagement gear ring 14, a two-gear output engagement sleeve 15, a three-four-gear fork shaft 16, a two-gear fork shaft 17, a linear spring 18, a three-four-gear fork 19, a two-gear fork 20, a fork shaft bushing 21, a constant mesh gear 22, an intermediate shaft three-gear 23, an intermediate shaft two-gear 24, an intermediate shaft one-gear 25, a power takeoff input gear 26, a power takeoff output shaft 27, a transmission gear 28, an input shaft bearing cover 29, an input shaft oil seal 30, an input shaft bearing 31, an output shaft bearing cover 32, an output shaft oil seal 33, an output shaft bearing 34, an output flange 35, an intermediate shaft rear bearing cover 36, a gear 37, concave locking holes 38, 39, a locking ball spring 40 and a locking hole 41.
Detailed Description
New energy pure electric commercial transmission, see FIG. 1: the transmission comprises a transmission body, the transmission body comprises a front shell 1 and a rear shell 2, the front shell 1 and the rear shell 2 are assembled to form a speed change cavity 3 and a power takeoff cavity 4, an input shaft 5, an output shaft 6 and an intermediate shaft 7 are arranged in the speed change cavity 3, the input shaft 5 and the output shaft 6 are coaxially arranged, the input end of the input shaft 5 protrudes outwards from the corresponding input hole position of the front shell 1, the output end of the output shaft 6 protrudes outwards from the corresponding output hole position of the rear shell 2, the center of the rear end surface shaft of the input shaft 5 is provided with an inwards concave shaft center hole, the front end of the output shaft 6 is positioned in the shaft center hole through a front end bearing 8, a four-gear output gear 9 is fixedly sleeved on the input shaft 5, a three-gear output gear 10, a two-gear output gear 11 and a first-gear output gear 12 are sequentially sleeved on the front shell 1 towards the axial length direction of the rear shell 2 through bearings, a three-four-gear output meshing sleeve 13 is sleeved on an axial region between the four-gear output gear 9 and the three-gear output gear 10, corresponding gear meshing 14 is fixedly sleeved on corresponding sides of the four-gear output gear 9 and the three-gear 20 respectively,
A second gear output meshing sleeve 15 is sleeved in an axial region between the second gear output gear 11 and the first gear output gear 12, corresponding meshing gear rings 14 are fixedly sleeved on corresponding sides of the second gear output gear 11 and the first gear output gear 12 respectively, a third gear and fourth gear shifting fork shaft 16 and a second gear shifting fork shaft 17 which are coaxially arranged are also arranged in the upper cavities of the input shaft 1 and the output shaft 2, the third gear and fourth gear shifting fork shaft 16 and the second gear shifting fork shaft 17 are coaxially and limitedly connected through a linear spring 18, a third gear and fourth gear shifting fork 19 is arranged at a driving groove position of the third gear and fourth gear shifting fork shaft 16 corresponding to the third and fourth gear output meshing sleeve 13, a second gear shifting fork 20 is arranged at a driving groove position of the second gear and fourth gear shifting fork shaft 17 corresponding to the second gear output meshing sleeve 15, a shifting fork shaft bushing 21 is arranged at friction parts of the two shifting fork shafts corresponding to the front shell 1 and the rear shell 2,
The intermediate shaft 7 is fixedly sleeved with a constant mesh gear 22, an intermediate shaft third gear 23, an intermediate shaft second gear 24 and an intermediate shaft first gear 25 in sequence along the axial direction, the constant mesh gear 22 is in mesh connection with a fourth gear transmission gear 9, the intermediate shaft third gear 23 is in mesh connection with a third gear output gear 10, the intermediate shaft second gear 24 is in mesh connection with a second gear output gear 11, the intermediate shaft first gear 25 is in mesh connection with a first gear output gear 12,
A power take-off input gear 26 and a power take-off output shaft 27 are arranged in the power take-off cavity 4, a transmission gear 28 is fixedly sleeved on the power take-off output shaft 27, and the power take-off input gear 26 is respectively connected with the intermediate shaft three-gear 23 and the transmission gear 28 in a meshed mode.
The front end cover 1 of the front shell 1 corresponding to the input hole is provided with an input shaft bearing cover 29, the positioning hole of the input shaft bearing cover 29 is provided with an input shaft oil seal 30, the position of the input shaft 5 corresponding to the input hole is sleeved with an input shaft bearing 31, and the part of the input shaft 5 protruding forward of the input shaft bearing cover 29 is used for externally connecting a motor;
The rear end cover 2 of the rear shell 2 corresponding to the output hole is provided with an output shaft bearing cover 32, a positioning hole of the output shaft bearing cover 32 is provided with an output shaft oil seal 33, the position of the output shaft 6 corresponding to the output hole is sleeved with an output shaft bearing 34, and the rear end of the output shaft 6 protruding outwards from the output shaft bearing cover 32 is fixedly provided with an output flange 35;
the position of the intermediate shaft 7 relative to the rear end cover 2 is backward convex, and an intermediate shaft rear bearing cover 36 is covered, so that the maintenance is convenient and quick;
The length directions of the three-fourth shift fork shaft 16 and the two-second shift fork shaft 17 are respectively provided with a rack structure, and an external gear shifting mechanism 37 is meshed with the rack structures through a transmission gear; the gearshift 37 is not described in detail, as it is not within the scope of the present technique;
One side of the integral shifting fork shaft formed by the three-fourth shifting fork shaft 16 and the two-second shifting fork shaft 17 is provided with an inward concave locking hole 38, one side of the shifting fork shaft guide hole of the rear shell 2 is provided with a locking guide hole, a locking ball spring 40 with a steel ball 39 is placed in the locking guide hole, the outer end of the locking ball spring 40 is packaged through a locking hole bolt 41, the steel ball 39 is positioned in the inward concave locking hole 38 in a locking state, and the gear position is ensured to be reliable in a neutral state.
The working principle is as follows:
The transmission principle of each gear is as follows:
First gear
The driving motor comprises an input shaft, a four-gear output gear, a middle shaft, a first-gear output gear of the middle shaft, a meshing gear ring, a first-gear output meshing sleeve, an output shaft and an output flange.
Second gear
Drive motor- & gt input shaft- & gt four-gear output gear- & gt jackshaft second gear- & gt second gear output gear- & gt meshing gear ring- & gt first gear output meshing sleeve- & gt output shaft- & gt output flange.
Three gear
Drive motor- & gt input shaft- & gt four-gear output gear- & gt jackshaft three-gear- & gt three-gear output gear- & gt meshing gear ring- & gt three-four-gear output meshing sleeve- & gt output shaft- & gt output flange.
Four-gear
Driving motor, input shaft, meshing gear ring, three-four gear output meshing sleeve, output shaft and output flange.
The four pairs of gears are used for realizing four gears, the coaxial arrangement structure of the input shaft and the output shaft is adopted, the whole transmission is small in size, the friction parts of the shifting fork shaft, the front shell and the rear shell are all provided with shifting fork shaft bushings, the friction coefficient is reduced, the gear shifting damping is reduced, the wear resistance is improved, and meanwhile, the rotation speed difference of the gear to be shifted by the meshing sleeve is adjusted by controlling the rotation speed of the driving motor, so that gear shifting without rotation speed difference or gear shifting with small rotation speed difference is realized; compared with the hydraulic control gear shifting of the traditional vehicle, the invention is simplified into the meshing sleeve, so that the structure is simpler, the performance is more reliable, and meanwhile, the side part of the intermediate shaft is connected with the power takeoff structure, thereby meeting the power taking requirement in the running process of part of the commercial vehicle; in conclusion, the two-stage four-gear transmission is adopted, so that the structure is simpler, the transmission efficiency is higher, the power performance is better, and the after-sales maintenance cost is less.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention 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. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. A new forms of energy pure electric commercial transmission, its characterized in that: the transmission comprises a transmission body, the transmission body comprises a front shell and a rear shell, a speed change cavity and a power takeoff cavity are formed after the front shell and the rear shell are assembled, an input shaft, an output shaft and a middle shaft are arranged in the speed change cavity, the input shaft and the output shaft are coaxially arranged, the input end of the input shaft protrudes outwards from the position of a corresponding input hole of the front shell, the output end of the output shaft protrudes outwards from the position of a corresponding output hole of the rear shell, the center of a rear end surface shaft of the input shaft is provided with an inwards concave shaft center hole, the front end of the output shaft is positioned in the shaft center hole through a front end bearing, a four-gear output gear is fixedly sleeved on the input shaft, a three-gear output gear, a two-gear output gear and a first-gear output gear are sleeved on the output shaft from the front shell to the axial length direction of the rear shell in sequence through bearings, the axial region between the four-gear output gear and the three-gear output gear is sleeved with a three-four-gear output meshing sleeve, corresponding sides of the four-gear output gear and the three-gear output gear are fixedly sleeved with corresponding meshing gear rings respectively, the axial region between the two-gear output gear and the first-gear output gear is sleeved with a two-gear output meshing sleeve, corresponding sides of the two-gear output gear and the first-gear output gear are fixedly sleeved with corresponding meshing gear rings respectively, the upper cavities of the input shaft and the output shaft are also provided with a three-four-gear shifting fork shaft and a two-gear shifting fork shaft which are coaxially arranged, the three-four-gear shifting fork shaft and the two-gear shifting fork shaft are coaxially and limitedly connected through a linear spring, the three-four-gear shifting fork shaft is provided with a two-gear shifting fork corresponding to the driving groove position of the three-four-gear output meshing sleeve, the friction parts of the two shifting fork shafts corresponding to the front shell and the rear shell are respectively provided with a shifting fork shaft bushing, a normally meshed gear, an intermediate shaft third gear, an intermediate shaft second gear and an intermediate shaft first gear are fixedly sleeved on the intermediate shaft in sequence along the axial direction, the normally meshed gear is in meshed connection with the fourth gear output gear, the intermediate shaft third gear is in meshed connection with the third gear output gear, the intermediate shaft second gear is in meshed connection with the second gear output gear, the intermediate shaft first gear is in meshed connection with the first gear output gear, a power takeoff input gear and a power takeoff output shaft are arranged in a power takeoff cavity, a transmission gear is fixedly sleeved on the power takeoff output shaft, and the power takeoff input gear is respectively in meshed connection with the intermediate shaft third gear and the transmission gear.
2. A new energy electric only commercial transmission according to claim 1, wherein: the front end cover of the front shell, which corresponds to the input hole, is provided with an input shaft bearing cover, the positioning hole of the input shaft bearing cover is provided with an input shaft oil seal, the position of the input shaft, which corresponds to the input hole, is sleeved with an input shaft bearing, and the part of the input shaft, which protrudes forwards from the input shaft bearing cover, is used for externally connecting a motor.
3. A new energy electric only commercial transmission according to claim 1, wherein: the rear end cover of the rear shell corresponding to the output hole is provided with an output shaft bearing cover, the positioning hole of the output shaft bearing cover is provided with an output shaft oil seal, the position of the output shaft corresponding to the output hole is sleeved with an output shaft bearing, and the rear end of the output shaft protruding outwards from the output shaft bearing cover is fixedly provided with an output flange.
4. A new energy electric only commercial transmission according to claim 1, wherein: and the position of the intermediate shaft relative to the rear end cover is backward convex, and an intermediate shaft rear bearing cover is covered.
5. A new energy electric only commercial transmission according to claim 1, wherein: the three-four shift fork shaft and the two-shift fork shaft are respectively provided with a rack structure in the length direction, and an external gear shifting mechanism is meshed with the rack structures through a transmission gear.
6. A new energy electric only commercial transmission according to claim 1, wherein: one side of the integral shifting fork shaft formed by the three-fourth shift fork shaft and the two-second shift fork shaft is provided with an inwards concave locking hole, one side of the shifting fork shaft guide hole of the rear shell is provided with a locking guide hole, a locking ball spring with a steel ball is placed in the locking guide hole, the outer end of the locking ball spring is packaged through a locking hole bolt, and the steel ball is positioned in the inwards concave locking hole in a locking state.
CN202011389405.0A 2020-12-02 2020-12-02 New energy pure electric commercial transmission Active CN112360934B (en)

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