CN101949431A - Rear drive gearbox of micro automobile - Google Patents
Rear drive gearbox of micro automobile Download PDFInfo
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- CN101949431A CN101949431A CN2010105012346A CN201010501234A CN101949431A CN 101949431 A CN101949431 A CN 101949431A CN 2010105012346 A CN2010105012346 A CN 2010105012346A CN 201010501234 A CN201010501234 A CN 201010501234A CN 101949431 A CN101949431 A CN 101949431A
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Abstract
The invention discloses a rear drive gearbox of a micro automobile. The rear drive gearbox comprises a gearbox casing and a gear synchronizer mechanism, and is characterized in that the gear synchronizer mechanism comprises a main shaft component, an input shaft component, a middle shaft component and a reverse gear component, wherein the two ends of the main shaft component are cooperatively connected with the gearbox casing through bearings respectively; the left end of the input shaft component is cooperatively connected with the gearbox casing through the bearing, and the right end of the input shaft component is matched with an inner wall of a blind hole at the left end of a main shaft through the bearing; the two ends of the middle shaft component are cooperatively connected with the gearbox casing through the bearings; and a reverse gear idler gear shaft of the reverse gear component is cooperatively connected with the gearbox casing. The rear drive gearbox has the advantages of effectively reducing the deflection deformation of shafting, preventing over-positioning of the bearing and a cantilever beam structure, contributing to reducing noise and improving bearing capacity of the complete machine, improving the extensibility of the gearbox and improving the gear shift comfortableness, along with simple and compact structure and convenient disassembling and assembling.
Description
Technical field
The present invention relates to automotive transmission, especially relate to a kind of rear driving speed changer of minicar.
Technical background
At present, the rear driving speed changer of domestic employed minicar, the gear of its axle system is arranged all to 1-5 from front to back and is kept off, driving gear is cantilever beam structure or adopts more bearing for the requirement of satisfying intensity and support, in addition after the basic structure of speed changer is determined, 5 retainings can only (velocity ratio be 1 or (velocity ratio is less than 1 in the overgear for direct retaining.Its shortcoming: the one, the winding degree distortion of axle system is big, and speed changer easily produces noise and utters long and high-pitched sounds; Two bearings that are to use are too much, not only increased cost, are easy to generate the reliability that location (location is meant the multiple constraint excessively to part, the situation that causes locating basis to be interfered mutually excessively) reduces speed changer on the contrary; The 3rd, after transmission design that structure the is limit setting, in the difficulty that directly extends between retaining and the overgear, car load vehicle change backstay layout is difficulty comparatively.Therefore, there is further improved demand.
Summary of the invention
The rear driving speed changer that the purpose of this invention is to provide a kind of minicar, its reliability height, noise are little, and manoeuvrable is comfortable, and long service life is applicable to the rear-guard microbus of the multiple model of moment of torsion below 150Nm.
The rear driving speed changer of a kind of minicar of the present invention, comprise mission case, be located at the gear synchronizer mechanisms in the mission case, it is characterized in that: described gear synchronizer mechanisms comprises spindle part, input shaft assembly, intermediate shaft assembly and the assembly that reverses gear;
The two end part of the main shaft of spindle part are connected on mission case by the clutch shaft bearing and second bearing respectively, left end at main shaft is provided with five retaining synchro converter ring and blind holes, being provided with main shaft between the clutch shaft bearing and second bearing is the spindle transmission gear of spline fitted, the right at second bearing is provided with worm screw, this worm screw is fixed on the main shaft by pin and collar, and this worm screw provides rate signal with the worm gear engagement that is contained on the extension case for car load;
The left part of the input shaft of input shaft assembly is connected on mission case by the 3rd bearing, and the right part of input shaft cooperates with the inwall of main shaft left end blind hole by the 4th bearing; On input shaft, be provided with input first gear, input reverse gear, input second gear, input four retaining gears, four retaining synchro converter rings, high speed synchroniser, three retaining synchro converter rings, input three retaining gears and five retaining synchronizers from left to right successively; Wherein importing first gear, input reverse gear, input second gear and input shaft is overall structure, input four retaining gears and input three retaining gears are enclosed within on the input shaft by the needle bearing sky, and high speed synchroniser and five retaining synchronizers are fixed on the input shaft by spline and collar respectively;
The two end part of the jack shaft of intermediate shaft assembly are connected on mission case by the 5th bearing and the 6th bearing respectively, are provided with first gear, a retaining synchro converter ring, low speed synchronizer, reverse gear, two retaining synchro converter rings, second gear, four retaining gears, three retaining gear and driving gears on jack shaft from left to right successively; Wherein four retaining gears, three retaining gears and driving gear and jack shaft are overall structure, first gear and second gear are enclosed within on the jack shaft by the needle bearing sky, reverse gear and low speed synchronizer are overall structure, and the low speed synchronizer is fixed on the jack shaft by spline and collar;
The idling gear shaft that reverses gear of assembly of reversing gear is connected on mission case, the idler gear that reverses gear, and sky is enclosed within on the idling gear shaft that reverses gear;
The spindle transmission gear of spindle part and the driving gear of intermediate shaft assembly often mesh; The input four retaining gears of input shaft assembly and four retaining gears of intermediate shaft assembly often mesh; The input three retaining gears of input shaft assembly and three retaining gears of intermediate shaft assembly often mesh; The input second gear of input shaft assembly and the second gear of intermediate shaft assembly often mesh; The input first gear of input shaft assembly and the first gear of intermediate shaft assembly often mesh; The reverse gear of the input reverse gear of idler gear and input shaft assembly and intermediate shaft assembly of reversing gear is corresponding/engagement.When the speed changer extension reversed gear, the input reverse gear meshed with reverse gear idler gear and reverse gear respectively, realizes reversing gear.
The rear driving speed changer of described a kind of minicar also comprises the gear shift mechanism that is located at the mission case outside, gearshift and outer gearshift in this gear shift mechanism is divided into;
Interior gearshift comprises locks steel ball assembly, one or two retaining selector forks, and one or two retainings are changed lever, one or two retaining gear levels, and three or four retaining gear levels, five keep off the reverse gear gear level and the selector fork that reverses gear; Wherein keep off changing lever by one or two between one or two retaining selector forks and one or the two retaining gear levels and be connected; One or two retaining selector forks cooperate with the low speed synchronizer, and three or four retaining gear levels cooperate with high speed synchroniser, and five keep off the gear level and five that reverses gear keeps off synchronizers and cooperate;
Outer gearshift comprises the gearshift box assembly; The gearshift box assembly is made up of gearshift case, gearshift axle, return spring, gearshift fork and gearshift rocking arm; Gearshift rocking arm and gearshift fork are fixed on the gearshift axle by pin, and the return spring sky is enclosed within on the gearshift axle.
The rear driving speed changer of described a kind of minicar also comprises the gearshift mutual interlocking gear and five that the is located at mission case inside mutual interlocking gear that reverses gear;
The gearshift mutual interlocking gear is made up of interlocking steel ball, interlocking plunger, and the gear level interlocking of interact to realize shifting gears of reversing gear of this gearshift mutual interlocking gear and one or two retaining gear levels, three or four retaining gear levels and five retainings can prevent effectively that when a certain retaining of extension the while hangs another retaining again;
Five reverse gear mutual interlocking gear by reverse gear the lock cam, reverse gear the lock return spring, reverse gear the lock bolt, reverse gear the lock cam pin form, the pin on the gearshift fork that reverses gear on lock cam and the outer gearshift interacts and realizes five interlockings of reversing gear, can effectively prevent to put into gear simultaneously and the vehicle high speed driving time mistake extension reverse gear.
The rear driving speed changer of described a kind of minicar, its described mission case are divided into preceding casing, rear box, extension casing three parts vertically, link together by bolt between the three.
Beneficial effect of the present invention:
Because the gear synchronizer mechanisms top gear that radial force is little---input four retaining gears, four keep off the middle part of arrangement of gears in axle system, so, effectively reduced the rich degree distortion of axle system.
Because only support is set at the two end part of each, so, avoided bearing to cross location and cantilever beam structure, help reducing noise, improve the bearing capacity of complete machine.
Because gear shift mechanism assembles with kit form, so, simple and compact for structure, easy accessibility; Because gear shift mechanism is located at the outside of mission case, so, help the car load layout, and improved the ductility of speed changer; Because gearshift fork (wavy surface) and the effect of locking steel ball assembly, so, increase the suction sense of the gearshift of speed changer, improve shifting comfort.
Owing to outer gearshift symmetric design, help improving the ductility of complete machine, so, be applicable to most microbus, minitruck.
Description of drawings
Fig. 1 is a profile schematic representation of the present invention.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is the schematic representation of input shaft assembly.
Fig. 4 is the schematic representation of intermediate shaft assembly.
Fig. 5 is the schematic representation of spindle part.
Fig. 6 is the schematic representation of interior gearshift.
Fig. 7 is the schematic representation of outer gearshift.
Fig. 8 is the schematic representation of gearshift mutual interlocking gear.
Fig. 9 is five schematic representation that reverse gear mutual interlocking gear.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Rear driving speed changer referring to a kind of minicar illustrated in figures 1 and 2 comprises mission case, is located at the gear synchronizer mechanisms in the mission case, and its gear synchronizer mechanisms comprises spindle part, input shaft assembly, intermediate shaft assembly and the assembly that reverses gear;
Referring to Fig. 5, the two end part of the main shaft 12 of spindle part are connected on mission case by the clutch shaft bearing 31 and second bearing 32 respectively, left end at main shaft is provided with five retaining synchro converter ring 34 and blind holes, be provided with between the clutch shaft bearing and second bearing with main shaft is the spindle transmission gear 11 of spline fitted, be provided with worm screw 33 on the right of second bearing, this worm screw is fixed on the main shaft by pin and collar; This worm and wheel engagement provides rate signal for car load;
Referring to Fig. 3, the left part of the input shaft 1 of input shaft assembly is connected on mission case by the 3rd bearing 23, and the right part of input shaft cooperates with the inwall of main shaft 12 left end blind holes by the 4th bearing 35; On input shaft, be provided with input first gear 2, input reverse gear 5, input second gear 6, input four retaining gears 7, four retaining synchro converter rings 24, high speed synchroniser 8, three retaining synchro converter rings 25, input three retaining gears 9 and five retaining synchronizers 10 from left to right successively; Wherein import first gear 2, input reverse gear 5, input second gear 6 and input shaft 1 and be overall structure, input four retaining gears 7 and input three retaining gears 9 are enclosed within on the input shaft 1 by the needle bearing sky, and high speed synchroniser 8 and five retaining synchronizers 10 are fixed on the input shaft 1 by spline and collar respectively;
Referring to Fig. 4, the two end part of the jack shaft 17 of intermediate shaft assembly are connected on mission case by the 5th bearing 26 and the 6th bearing 30 respectively, are provided with first gear 21, a retaining synchro converter ring 27, low speed synchronizer 20, reverse gear 28, two retaining synchro converter rings 29, second gear 19, four retaining gears 18, three retaining gear 16 and driving gears 14 on jack shaft from left to right successively; Wherein four retaining gears, three retaining gears and driving gear and jack shaft are overall structure, first gear and second gear are enclosed within on the jack shaft by the needle bearing sky, reverse gear and low speed synchronizer are overall structure, and the low speed synchronizer is fixed on the jack shaft by spline and collar;
The idling gear shaft 3 that reverses gear of assembly of reversing gear is connected on mission case, the idler gear 4 that reverses gear, and sky is enclosed within on the idling gear shaft that reverses gear;
The spindle transmission gear 11 of spindle part often meshes with the driving gear 14 of intermediate shaft assembly; The input four retaining gears 7 of input shaft assembly often mesh with four retaining gears 18 of intermediate shaft assembly; The input three retaining gears 9 of input shaft assembly often mesh with three retaining gears 16 of intermediate shaft assembly; The input second gear 6 of input shaft assembly often meshes with the second gear 19 of intermediate shaft assembly; The input first gear 2 of input shaft assembly often meshes with the first gear 21 of intermediate shaft assembly; The reverse gear reverse gear 28 corresponding/engagements of input reverse gear 5 and intermediate shaft assembly of idler gear 4 and input shaft assembly; When the speed changer extension reversed gear, input reverse gear 5 meshed with reverse gear idler gear 4 and reverse gear 28 respectively, thereby realizes reversing gear.
Referring to Fig. 6 and Fig. 7, the rear driving speed changer of described a kind of minicar also comprises the gear shift mechanism that is located at the mission case outside, gearshift and outer gearshift in this gear shift mechanism is divided into; Interior gearshift comprises locking steel ball assembly 36,1 retaining selector forks 37, one two retainings change lever 38, one two retaining gear levels, 39, three four retaining gear levels, 40, five retainings the reverse gear gear level 41 and the selector fork 42 that reverses gear; Wherein keep off changing lever by one or two between one or two retaining selector forks 37 and one or the two retaining gear levels 39 and 38 be connected; One or two retaining selector forks 37 cooperate with low speed synchronizer 20, and three or four retaining gear levels 40 cooperate with high speed synchroniser 8, and five keep off the gear level 41 and five that reverses gear keeps off synchronizers 10 and cooperate;
Outer gearshift comprises the gearshift box assembly; The gearshift box assembly is made up of gearshift case 43, gearshift axle 44, return spring 45, gearshift fork 46 and gearshift Rocker arm 49; Gearshift Rocker arm 49 and gearshift fork 46 are fixed on the gearshift axle 44 by pin, and return spring 45 skies are enclosed within on the gearshift axle 44.
Referring to Fig. 8 and Fig. 9, the rear driving speed changer of described a kind of minicar also comprises the gearshift mutual interlocking gear and five that the is located at mission case inside mutual interlocking gear that reverses gear; The gearshift mutual interlocking gear is made up of interlocking steel ball 50, interlocking plunger 51, this gearshift mutual interlocking gear and one or two retaining gear levels 39,34 retaining gear levels 40 and the five retainings gear level 41 that reverses gear interacts and realizes the gearshift interlockings, can prevent effectively that when hanging a certain retaining the while hangs another retaining again; Five reverse gear mutual interlocking gear by reverse gear the lock cam 47, reverse gear the lock return spring 48, reverse gear the lock bolt 52, reverse gear the lock cam pin 53 form, the pin on the gearshift fork 46 that reverses gear on lock cam 47 and the outer gearshift interacts and realizes five interlockings of reversing gear, can effectively prevent to put into gear simultaneously and the vehicle high speed driving time mistake extension reverse gear.
Referring to Fig. 1, described mission case is divided into preceding casing 22, rear box 15 vertically, extends casing 13 3 parts, links together by bolt between the three.
(1) change four implementations of keeping off:
When shift of transmission four retainings, gearshift Rocker arm 49 swing---gearshift fork 46 swing---to the right left and is driven three or four and keep off gear levels and be moved to the left, driving high speed synchroniser 8 moves to input four retaining gears 7 directions, high speed synchroniser 8 extruding four retaining synchro converter rings 24, this extruding force will make four retaining synchro converter rings 24 and input four retaining gears 7 produce friction torque; This friction torque will promote or reduce the rotating speed of input shaft 1, make its rotating speed and input four retaining gears 7 identical (promptly synchronous), after input four retaining gears 7 and input shaft 1 synchronization, high speed synchroniser 8 continues to move to input shaft four retaining gears 7 directions, cooperate with input four retaining gears 7 by spline at last, finish gearshift.Speed changer change three when retaining principle with change four identically when keeping off, the direction of just shifting gears is opposite.
Torque transmission way during four retainings: input shaft 1 → high speed synchroniser 8 → input four retaining gears 7 → four retaining gears 18 → jack shaft 17 → driving gear 14 → spindle transmission gear 11 → main shaft 12.
Torque transmission way during three retainings: input shaft 1 → high speed synchroniser 8 → input three retaining gears 9 → three retaining gears 16 → jack shaft 17 → driving gear 14 → spindle transmission gear 11 → main shaft 12.
(2) change an implementation of keeping off:
When shift of transmission one retaining, the transposition assembly turns left and drives gearshift Rocker arm 49 and move to inside, because gearshift Rocker arm 49, gearshift fork 46 and gearshift axle 44 have been fixed as integral body by pin, gearshift fork 46 moves inward compression retracteding position spring 45.Finish transposition.Swing left by gearshift Rocker arm 49 then and drive gearshift fork 46 and swing drive one or two to the right and keep off gear levels 39 and move right, drive one or two and keep off 38 rotations of changing lever, driving one or two retaining selector forks 37 is moved to the left, driving low speed synchronizer 20 moves to jack shaft first gear 21 directions, low speed synchronizer 20 extruding one retaining synchro converter ring 27, this extruding force will make a retaining synchro converter ring 27 and jack shaft first gear 21 produce friction torque; This friction torque will promote or reduce the rotating speed of first gear 21, make its rotating speed identical with jack shaft 17 rotating speeds (promptly synchronous), after first gear 21 and jack shaft 17 synchronization, low speed synchronizer 20 continues to move to first gear 21 directions, cooperate with first gear 21 by spline at last, finish gearshift.Principle was with to change when retaining identical when speed changer shifted into second, and the direction of just shifting gears is opposite.
Torque transmission way during one retaining: input shaft 1 → input first gear 2 → first gear 21 → low speed synchronizer 20 → jack shaft 17 → driving gear 14 → spindle transmission gear 11 → main shaft 12.
Torque transmission way during two retainings: input shaft 1 → input second gear 6 → second gear 19 → low speed synchronizer 20 → jack shaft 17 → driving gear 14 → spindle transmission gear 11 → main shaft 12.
(3) change five implementations of keeping off:
When shift of transmission five retainings, the transposition assembly turns right and drives gearshift Rocker arm 49 and move to the outside, because gearshift Rocker arm 49, gearshift fork 46 and gearshift axle 44 have been fixed as integral body by pin, so gearshift fork 46 outwards moves compression retracteding position spring 45, finish transposition (being block selecting).Swing left by gearshift Rocker arm 49 then and drive gearshift fork 46 and swing drive five to the right and keep off the gear level 41 that reverses gear and move right, driving five retaining synchronizers 10 moves to main shaft 12 directions, five retaining synchronizers, 10 extruding, five retaining synchro converter rings 34, this extruding force will make five retaining synchro converter rings 34 and main shaft 12 produce friction torque; This friction torque will promote or reduce the rotating speed of input shaft 1, make its rotating speed identical with main shaft 12 rotating speeds (promptly synchronous), after input shaft 1 and main shaft 12 synchronization, five retaining synchronizers 10 continue to move to main shaft 12 directions, cooperate with main shaft 12 by spline at last, finish gearshift.
Torque transmission way during five retainings: input shaft 1 → five retaining synchronizer 10 → main shaft 12.
The implementation of (4) reversing gear:
Need transposition earlier when realization is reversed gear, the implementation of transposition is identical with five retainings.Gearshift was that gearshift Rocker arm 49 is swung to the right and driven gearshift fork 46 and swing left and drive five and keep off the gear level 41 that reverses gear and be moved to the left, reverse gear selector fork 42 of drive rotates, stirring the idler gear 4 that reverses gear moves right along the idling gear shaft that reverses gear, up to meshing simultaneously, finish gearshift with countershaft reverse gear 28 and input shaft reverse gear 5.
Torque transmission way when reversing gear: input shaft 1 → input reverse gear 5 → idler gear 4 → reverse gear 28 → jack shaft 17 → driving gear 14 → spindle transmission gear 11 → main shaft 12 reverses gear.
(5) interlocking implementation:
By above-mentioned gearshift implementation as can be known, during shift of transmission, the corresponding gear level of this gear will move to the left or to the right, when speed changer changed a retaining, one or two retaining gear levels 39 moved right, and former interlocking steel ball 50 in one or two retaining gear level 39V shape grooves is extruded, interlocking steel ball 50 is forced to three or four retaining gear levels 40 and is rolled, and extruding interlocking plunger 51 moves to five gear level 41 directions of reversing gear, and interlocking plunger 51 will push another interlocking steel ball 50 again and move to five gear level 41 directions of reversing gear
After gearshift was finished, interlocking steel ball 50 was extruded to respectively that three or four retaining gear levels 40 and five reverse gear in the V-type groove of gear level 41 and is fixing, can't realize interlocking to moving owing to there is interlocking steel ball 50 to block three or four retaining gear levels 40, five gear level 41 that reverses gear.Interlocking principle was same as described above when speed changer changed other gears.
Misoperation is hung and is reversed gear when preventing the gearshift of speed changer five retaining, and speed changer is provided with five mutual interlocking gears that reverse gear.It realizes that principle is: when speed changer when five reverse gear the direction transposition, pin on the gearshift fork 46 reverses gear extruding and locks cam 47, the lock cam 47 that reverses gear clockwise rotates along the lock bolt that reverses gear, pin when speed changer is hung five retainings on the gearshift fork 46 will slide into the below of the lock cam 47 that reverses gear, as hanging the pin return not on the fork 46 of promptly shifting gears that reverses gear by force, directly upwards upset, its with drive reverse gear the lock cam 47 rotate counterclockwise together, at this moment will bump against the lock cam pin 53 that reverses gear can't be rotated further, and promptly can't hang and reverse gear.Five interlocking functions that reverse gear have been realized.
Claims (4)
1. the rear driving speed changer of a minicar comprises mission case, is located at the gear synchronizer mechanisms in the mission case, and it is characterized in that: described gear synchronizer mechanisms comprises spindle part, input shaft assembly, intermediate shaft assembly and the assembly that reverses gear;
The two end part of the main shaft of spindle part (12) are connected on mission case by clutch shaft bearing (31) and second bearing (32) respectively, left end at main shaft is provided with five retaining synchro converter ring (34) and blind holes, be provided with between the clutch shaft bearing and second bearing with main shaft is the spindle transmission gear (11) of spline fitted, be provided with worm screw (33) on the right of second bearing, this worm screw is fixed on the main shaft by pin and collar;
The left part of the input shaft of input shaft assembly (1) is connected on mission case by the 3rd bearing (23), and the right part of input shaft cooperates with the inwall of main shaft (12) left end blind hole by the 4th bearing (35); On input shaft, be provided with input first gear (2), input reverse gear (5), input second gear (6), input four retaining gears (7), four retaining synchro converter rings (24), high speed synchroniser (8), three retaining synchro converter rings (25), input three retaining gears (9) and five retaining synchronizers (10) from left to right successively; Wherein import first gear (2), input reverse gear (5), input second gear (6) and input shaft (1) and be overall structure, input four retaining gears (7) and input three retaining gears (9) are enclosed within on the input shaft (1) by the needle bearing sky, and high speed synchroniser (8) and five retaining synchronizers (10) are fixed on the input shaft (1) by spline and collar respectively;
The two end part of the jack shaft of intermediate shaft assembly (17) are connected on mission case by the 5th bearing (26) and the 6th bearing (30) respectively, are provided with first gear (21), a retaining synchro converter ring (27), low speed synchronizer (20), reverse gear (28), two retaining synchro converter rings (29), second gear (19), four retaining gears (18), three retaining gear (16) and driving gears (14) on jack shaft from left to right successively; Wherein four retaining gears, three retaining gears and driving gear and jack shaft are overall structure, first gear and second gear are enclosed within on the jack shaft by the needle bearing sky, reverse gear and low speed synchronizer are overall structure, and the low speed synchronizer is fixed on the jack shaft by spline and collar;
The idling gear shaft that reverses gear (3) of assembly of reversing gear is connected on mission case, the idler gear (4) that reverses gear, and sky is enclosed within on the idling gear shaft that reverses gear;
Spindle transmission gear of spindle part (11) and the normal engagement of the driving gear (14) of intermediate shaft assembly; The input four retaining gears (7) of input shaft assembly and the normal engagement of four retaining gears (18) of intermediate shaft assembly; The input three retaining gears (9) of input shaft assembly and the normal engagement of three retaining gears (16) of intermediate shaft assembly; The input second gear (6) of input shaft assembly and the normal engagement of the second gear (19) of intermediate shaft assembly; The input first gear (2) of input shaft assembly and the normal engagement of the first gear (21) of intermediate shaft assembly; The reverse gear (28) of the input reverse gear (5) of idler gear (4) and input shaft assembly and intermediate shaft assembly of reversing gear is corresponding/engagement.
2. the rear driving speed changer of a kind of minicar according to claim 1 is characterized in that: also comprise the gear shift mechanism that is located at the mission case outside, gearshift and outer gearshift in this gear shift mechanism is divided into;
Interior gearshift comprises locks steel ball assembly (36), one or two retaining selector forks (37), and one or two retainings are changed lever (38), one or two retaining gear levels (39), and three or four retaining gear levels (40), five keep off reverse gear gear level (41) and the selector fork that reverses gear (42); Wherein keeping off change lever (38) by one or two between one or two retaining selector forks (37) and one or two retainings gear levels (39) is connected; One or two retaining selector forks (37) cooperate with low speed synchronizer (20), and three or four retaining gear levels (40) cooperate with high speed synchroniser (8), and five keep off the gear level (41) and five that reverses gear keeps off synchronizers (10) and cooperate;
Outer gearshift comprises the gearshift box assembly; The gearshift box assembly is made up of gearshift case (43), gearshift axle (44), return spring (45), gearshift fork (46) and gearshift rocking arm (49); Gearshift rocking arm (49) and gearshift fork (46) are fixed on the gearshift axle (44) by pin, and return spring (45) sky is enclosed within on the gearshift axle (44).
3. the rear driving speed changer of a kind of minicar according to claim 1 and 2 is characterized in that: also comprise the gearshift mutual interlocking gear and five that is located at the mission case outside mutual interlocking gear that reverses gear;
The gearshift mutual interlocking gear is made up of interlocking steel ball (50), interlocking plunger (51), this gearshift mutual interlocking gear and one or two retaining gear levels (39), three or four retaining gear levels (40) and the five retainings gear level (41) that reverses gear interact to be realized the gearshift interlocking, can prevent effectively that when hanging a certain retaining the while hangs another retaining again;
Five mutual interlocking gears that reverse gear are made up of the lock cam (47) that reverses gear, the lock return spring (48) that reverses gear, the lock bolt (52) that reverses gear, the lock cam pin (53) that reverses gear, the pin interaction realization five on the fork (46) of shifting gears on reverse gear lock cam (47) and the outer gearshift interlocking of reversing gear.
4. the rear driving speed changer of a kind of minicar according to claim 1 and 2, it is characterized in that: described mission case is divided into preceding casing (22), rear box (15) vertically, extends casing (13) three parts, links together by bolt between the three.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105012346A CN101949431B (en) | 2010-10-09 | 2010-10-09 | Rear drive gearbox of micro automobile |
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| CN2010105012346A CN101949431B (en) | 2010-10-09 | 2010-10-09 | Rear drive gearbox of micro automobile |
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| CN101949431A true CN101949431A (en) | 2011-01-19 |
| CN101949431B CN101949431B (en) | 2012-07-04 |
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| CN2288102Y (en) * | 1996-11-28 | 1998-08-19 | 山东省德州生建机械厂 | Variable speed gear for agricultural motor-vehicle |
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| CN109681589A (en) * | 2019-03-06 | 2019-04-26 | 重庆茂捷汽车变速器有限公司 | A kind of automobile gears speed changer |
| CN109764094A (en) * | 2019-03-06 | 2019-05-17 | 重庆茂捷汽车变速器有限公司 | A kind of automobile transmission axis |
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