CN2802191Y

CN2802191Y - Motor vehicle synchronous power-shift rear axle

Info

Publication number: CN2802191Y
Application number: CN 200520009464
Authority: CN
Inventors: 吴先友
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-13
Filing date: 2005-06-13
Publication date: 2006-08-02
Anticipated expiration: 2015-06-13

Abstract

The utility model relates to a synchronous gear shifting rear axle for a motor vehicle. A differential carrier (3) is fixed with basin-shaped teeth (5) engaged with an apical tooth shaft (4), and a main speed reducing casing (2) is provided with a box body (6). The inner side of the box body (6) is provided with a spline shaft (7), and the spline shaft (7) is fixedly sheathed with a low gear driving gear (8) and a high gear driving gear (9). The apical tooth shaft (4) is free sheathed with a low gear driven gear (10) and a high gear driven gear (11), and a synchronous clutch (12) is arranged between the low gear driven gear (10) and the high gear driven tooth (11). An outer sleeve of the synchronous clutch (12) is connected with a shifting fork shaft (14) through a shifting fork (13), and one side of the shifting fork shaft (14) is provided with a controller of the shifting fork shaft. The utility model can be used by being matched with a gearbox of an engine, can safely enlarge the gear shifting and moment changing range of the motor vehicle, enhances the optimal running speed and the climbing ability of the motor vehicle, can not damage the gears by beating and has the advantages of good gear shifting synchronism, compact structure, reliable operation and long service life.

Description

But Motor Vehicle synchronous mode shift back axle

Technical field

The utility model relates to a kind of vehicle rear bridge, but Motor Vehicle synchronous mode shift back axle especially.

Background technique

At present, the back axle of Motor Vehicle such as automobile or three, four-wheel motor cycle mainly is made up of rear axle housing, main deceleration shell, differential shell, corner tooth shaft, main reducing gear, differential mechanism and semiaxis etc., transmission shaft is delivered to the output torque of motor on the corner tooth shaft, is delivered to left and right half and the driving wheel rotation through main reducing gear, differential mechanism.Motor generally all is provided with a plurality of gears, can carry out gear shift according to the various road conditions and the needs that travel, to change the output speed and the moment of torsion of motor.In the design of Motor Vehicle is produced, the main structure of motor is not generally changed easily, development along with transportation network, the road conditions that Motor Vehicle faces also are diversified direction and develop, and particularly on country road or rugged mountain path, the shift scope of some motor can not satisfy the needs that travel, on the extraordinary road of road conditions, think that speed-raising but do not carry, meet steeper sloping road and the phenomenon that is short of power then occurs, the travel scope of Motor Vehicle is affected.For this reason, once there was the people on back axle, to remove original arched plate tooth-angle tooth drive mechanism, and change into two pairs of engagement spur gears are set at the two ends of differential mechanism, wherein two spur gears are fixed on the differential shell, in addition two straight-tooth byes are enclosed within on the input shaft, and between the empty cover of two on the input shaft spur gear shift shifting fork mechanism are set and realize shift.But the gearbox that the shift back axle binding engine of existing this structure carries can enlarge the shift scope of car load, improves best travelling speed of car load and grade ability.But owing to be the straight-tooth engagement, monodentate is stressed, and its shift shifting fork mechanism can not be realized synchromesh, therefore its gear ratio is little, and intensity is low, quick combination of moment between shift process middle gear, be easy to break tooth, thereby the potential safety hazard of bringing has also influenced working life of back axle.

The model utility content

But the purpose of this utility model provides a kind of Motor Vehicle synchronous mode shift back axle, but little to solve existing shift back axle gear ratio, intensity is low, can not realize synchromesh during shift and the problem of breaking tooth easily.

For addressing the above problem, but Motor Vehicle synchronous mode shift back axle described in the utility model, comprise rear axle housing, main deceleration shell, the differential shell, corner tooth shaft, left and right sides semiaxis and differential mechanism, main deceleration shell is installed on the rear axle housing, be fixed with the basin tooth on the differential shell, the angle increment engagement of basin tooth and corner tooth shaft, the other end of corner tooth shaft stretches out main deceleration shell, on the main deceleration shell casing is installed, be provided with splined shaft in the casing, corner tooth shaft and splined shaft all by bearings on casing, be installed with low-grade driving tooth and high-grade driving tooth on the splined shaft, kink has low-grade driven tooth and high-grade driven tooth on the corner tooth shaft, is provided with timing clutch between low-grade driven tooth and the high-grade driven tooth, the overcoat of timing clutch links by shift fork and declutch shift shaft, and a side of declutch shift shaft is provided with the declutch shift shaft controller.

Described declutch shift shaft controller can constitute by regulating bolt, pressure spring and bulb straight pin, regulating bolt thread is connected on the casing, regulate the chamber that bolt has an end opening, pressure spring is arranged in chamber, declutch shift shaft is provided with three sphere connected in stars, one of the bulb straight pin is arranged in pressure spring, and its bulb end and described sphere connected in star match.

The utility model is provided with a splined shaft as power input shaft in a side of corner tooth shaft, two pairs of driving and driven gears are set between splined shaft and corner tooth shaft, do not change the meshing engagement structure of arched plate tooth and corner tooth shaft angle increment on the differential housing, thereby can guarantee bigger gear ratio, and the intensity height.Between two driven gears of corner tooth shaft, timing clutch is set, made full use of the structural feature of timing clutch, under the control of engine clutch is coordinated, during shift, by the external tooth cover on the timing clutch with after the synchronizing ring of idle running is meshed, again by the male cone (strobilus masculinus) that matches between synchronizing ring inner conical surface and low-grade driven gear or the high-grade driven gear by pine to combining gradually tightly, realize both sides' synchronization by the frictional force between two conical surfaces, again by bilateral guiding tooth engagement.Owing to realized synchromesh, eliminated and meshed bilateral differential, thereby the powerful impact force of avoiding moment to be connected to form firmly broken tooth.By the effect of declutch shift shaft controller, declutch shift shaft all can reliably be located in neutral gear, low grade or high-grade arbitrary position, thereby can avoid the generation of trip stop phenomenon.

The beneficial effects of the utility model are: the gearbox that carries with motor is used, but the shift torque conversion range of enlarger motor-car, improve the best travelling speed and the grade ability of Motor Vehicle, and the synchronism of shift is good, the operation that can ensure safety is implemented, compact structure, reliable operation, long service life.

Description of drawings

Fig. 1 is a plan view of the present utility model;

Fig. 2 is an exploded view of the present utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

As shown in Figure 1 and Figure 2, but Motor Vehicle synchronous mode shift back axle described in the utility model is made up of rear axle housing 1, main deceleration shell 2, differential shell 3, corner tooth shaft 4, basin tooth 5, casing 6, splined shaft 7, low-grade driving tooth 8, high-grade driving tooth 9, low-grade driven tooth 10, high-grade driven tooth 11, timing clutch 12, shift fork 13, declutch shift shaft 14, adjusting bolt 15, pressure spring 16, bulb straight pin 17, land 18, synchronizing ring 19, left and right sides semiaxis 20 and differential mechanism 21 etc.Main deceleration shell 2 usefulness bolts are installed on the rear axle housing 1, and basin tooth 5 is fixed by bolts on the differential shell 3, and basin tooth 5 meshes the main deceleration part that constitutes back axle with the angle increment of corner tooth shaft 4, and the other end of corner tooth shaft 4 stretches out main deceleration shell 2.Casing 6 usefulness bolts are installed on the main deceleration shell 2, and can rotate arbitrarily angled installation as required, and casing is provided with splined shaft 7 for 6 li, corner tooth shaft 4 and splined shaft 7 all by bearings on casing 6.Low-grade driving tooth 8 and high-grade driving tooth 9 are solidly set on the splined shaft 7, and low-grade driven tooth 10 and high-grade driven tooth 11 kinks are on corner tooth shaft 4, and timing clutch 12 is located between low-grade driven tooth 10 and the high-grade driven tooth 11.Low-grade driving tooth 8 and low-grade driven tooth 10, high-grade driving tooth 9 is normal engagement with high-grade driven tooth 11, and all is designed to the helical teeth of anti-impact force.Synchronizing ring 19 is housed on the timing clutch 12, and the overcoat 12a of timing clutch 12 links by shift fork 13 and declutch shift shaft 14, and the declutch shift shaft controller is located at a side of declutch shift shaft 14.The toothholder 12b of timing clutch 12 is enclosed within on the splined shaft 7, and toothholder 12b and overcoat 12a are connected together, and synchronizing ring 19 is enclosed within on the toothholder 12b, the inside and outside conical surface for matching between synchronizing ring 19 and low-grade driven tooth 10 and the high-grade driven tooth 11.

Fig. 1, Fig. 2 illustrate the declutch shift shaft controller and constitute by regulating bolt 15, pressure spring 16 and bulb straight pin 17, regulating bolt 15 is threaded on the casing 6, regulate the chamber 15a that bolt 15 has an end opening, pressure spring 16 is arranged in chamber 15a, declutch shift shaft 14 is provided with three sphere connected in star 14a, one of bulb straight pin 17 is arranged in pressure spring 16, and its bulb end and described sphere connected in star 14a match.The height of sphere connected in star 14a is about 2/5 of bulb straight pin 17 bulb end radiuses.When promotion declutch shift shaft 14 makes sphere connected in star 14a placed in the middle cooperate with the bulb end of bulb straight pin 17, shift fork 13 is in neutral position, when top that sphere connected in star 14a cooperates with the bulb end of bulb straight pin 17, shift fork 13 is in high-grade position, when below that sphere connected in star 14a cooperated with the bulb end of bulb straight pin 17, shift fork 13 was in low gear position.Under the effect of pressure spring 16, the bulb end of bulb straight pin 17 can carry out axial limiting to declutch shift shaft 14, prevents that declutch shift shaft 14 from arbitrarily moving axially and cause trip stop.Also can act on the power that declutch shift shaft 14 footpaths make progress and adjust by regulating 15 pairs of bulb straight pins 17 of bolt.

Fig. 1, Fig. 2 also illustrate casing 6 and are made up of main box body 6a, case lid 6b and shift fork lid 6c, and case lid 6b is by being bolted on the main box body 6a, and shift fork lid 6c is by being bolted between main box body 6a and the case lid 6b.Casing 6 is divided into this three part, is convenient to dismounting and maintenance.

Also can find out from Fig. 1, Fig. 2: the power intake of splined shaft 7 is equipped with land 18, is used for connecting transmission shaft, is the moment of torsion transmission more reliable between transmission shaft and the splined shaft 7.

Working principle: when shift fork 13 is in neutral position, be that timing clutch 12 is in the neutral position between low-grade driven tooth 10 and the high-grade driven tooth 11, timing clutch 12 is not had an effect with low-grade driven tooth 10 and high-grade driven tooth 11, two groups of main driven gear vice division chiefs are in free bonding state, and this back axle is transferring power not.During motor-driven vehicle going, timing clutch 12 will combine transmitting torque with low-grade driven tooth 10 or high-grade driven tooth 11.When Motor Vehicle is thought speed-raising under steam, to reach best travelling speed, motor has reached the most high-grade if back axle is in low gear position, can stir declutch shift shaft 14, making shift fork 13 drive timing clutch 12 combines with high-grade driven tooth 11, moment of torsion on the splined shaft 7 is delivered on the corner tooth shaft 4 by high-grade driving tooth 9, high-grade driven tooth 11 and timing clutch 12, realizes speedup.Certainly, motor also can be realized speedup by allowing back axle switch to top grade from low grade in other grade.When the Motor Vehicle climbing, or travel in the field and when occurring being short of power, motor has been in low gear (a grade) if back axle is in high-grade position, can stir declutch shift shaft 14, make shift fork 13 drive timing clutch 12 to low-grade driven tooth 11 1 side shiftings, the inner conical surface of synchronizing ring 12c is combined with the male cone (strobilus masculinus) of low-grade driven tooth 11, the moment of torsion on the splined shaft 7 is delivered on the corner tooth shaft 4 by low-grade driving tooth 9, low-grade driven tooth 11 and timing clutch 12, realize slowing down, power is strengthened.Certainly, motor also can be realized slowing down and carries square in other grade by allowing back axle switch to low grade from top grade.This back axle is used in combination with the starting motor-driven vehicle machine gearbox (during the back axle shift, engine clutch need break away from power source), shift scope that can double enlarger motor-car, because as the shift clutch mechanism, any gear that can be implemented in engine mission is put this back axle is carried out shift with timing clutch 12.

Claims

1, but a kind of Motor Vehicle synchronous mode shift back axle, comprise rear axle housing (1), main deceleration shell (2), differential shell (3), corner tooth shaft (4), left and right sides semiaxis (20) and differential mechanism (21), main deceleration shell (2) is installed on the rear axle housing (1), be fixed with basin tooth (5) on the differential shell (3), basin tooth (5) meshes with the angle increment of corner tooth shaft (4), the other end of corner tooth shaft (4) stretches out main deceleration shell (2), it is characterized in that: casing (6) is installed on the main deceleration shell (2), casing (6) lining is provided with splined shaft (7), corner tooth shaft (4) and splined shaft (7) all by bearings on casing (6), be installed with low-grade driving tooth (8) and high-grade driving tooth (9) on the splined shaft (7), corner tooth shaft (4) is gone up kink low-grade driven tooth (10) and high-grade driven tooth (11), be provided with timing clutch (12) between low-grade driven tooth (10) and the high-grade driven tooth (11), the overcoat (12a) of timing clutch (12) links by shift fork (13) and declutch shift shaft (14), and a side of declutch shift shaft (14) is provided with the declutch shift shaft controller.

But 2, Motor Vehicle synchronous mode shift back axle according to claim 1, it is characterized in that: described declutch shift shaft controller constitutes by regulating bolt (15), pressure spring (16) and bulb straight pin (17), regulating bolt (15) is threaded on the casing (6), regulate the chamber (15a) that bolt (15) has an end opening, pressure spring (16) is arranged in chamber (15a), declutch shift shaft (14) is provided with three sphere connected in stars (14a), one of bulb straight pin (17) is arranged in pressure spring (16), and its bulb end and described sphere connected in star (14a) match.

But 3, Motor Vehicle synchronous mode shift back axle according to claim 1, it is characterized in that: described casing (6) is made up of main box body (6a), case lid (6b) and shift fork lid (6c), case lid (6b) is by being bolted on the main box body (6a), and shift fork lid (6c) is by being bolted between main box body (6a) and the case lid (6b).

But 4, Motor Vehicle synchronous mode shift back axle according to claim 1, it is characterized in that: the power intake of described splined shaft (7) is equipped with land (18).