CN2426428Y

CN2426428Y - Automotive four-speed speed box

Info

Publication number: CN2426428Y
Application number: CN 00223300
Authority: CN
Inventors: 赵亚新
Original assignee: GUANGYA SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd CHONGQING
Current assignee: GUANGYA SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd CHONGQING
Priority date: 2000-06-15
Filing date: 2000-06-15
Publication date: 2001-04-11
Anticipated expiration: 2010-06-15

Abstract

The utility model discloses an automotive four-speed gearbox, which is structurally characterized in that a constant mesh gears 2 and 8, three-speed gears 4 and 11 and two-speed gears 21 and 22 are bevel gears; a clutch collar 9 is arranged between the constant mesh gear 8 and the three-speed gear 11; a synchronizer 13 is arranged between the three-speed gear 11 and the two-speed gear 21; the clutch collar 9 and the synchronizer 13 are respectively connected with an operating rod 17 via shifting forks 10, 15 and shifting fork shafts 12, 16; a sliding gear 20 is connected with the operating rod 17 via a shifting fork 19 and a shifting fork shaft 18. The gearbox has the advantages of simple speed changing, less noise and stable running; the utility model can fully and effectively use the power of a motor, and can also be suitable for load-carrying vehicles running in the road conditions of poor road conditions and large slope.

Description

Automobile four-speed gear shift case

The utility model relates to a kind of change speed gear box of highway communication transportation means, especially automobile four-speed gear shift case.

What the light truck of domestic 130 series adopted mostly at present is three-speed gearbox, three-speed gearbox is because its gear is few, selectable transmitting ratio is few, and the three-speed transmitting ratio differs too big, so can not give full play to the tractive performance of former car engine, the requirement that agricultural bogie is poor through the road conditions of being everlasting, the gradient is big road conditions are travelled can not be adapted to, the demand of vast farm vehicle user low-speed heave-load can not be satisfied simultaneously; Also there are shortcomings such as volume is big, cost is high, noise is big, manipulation inconvenience in the light type agricultural car change speed gear box of 130 series in addition.

The purpose of this utility model provides a kind of automobile four-speed gear shift case, is not increasing former car cost, does not change on the basis of primary car structure, and by changing gearbox designs, it is too high to overcome former three class gear box rotating speed, and output torque is too small, the shortcoming that hill climbing ability is weak.

Concrete scheme of the present utility model is: comprise casing, constant mesh gear, tween drive shaft, 3rd gear, input shaft, output shaft, toothholder, sliding hub, shift fork, declutch shift shaft, case lid, joystick, cliding gear, second speed gear, reverse gear shaft, reverse gearwheel, middle straight-tooth etc., it is characterized in that: constant mesh gear, 3rd gear, second speed gear are helical wheels; Between constant mesh gear and 3rd gear, be provided with sliding hub, between 3rd gear and second speed gear, be provided with synchro; Sliding hub, synchro connect with joystick through shift fork and declutch shift shaft respectively; Cliding gear connects with joystick through shift fork and declutch shift shaft.

Adopt such scheme, can fully effectively utilize the power of driving engine, more can adapt to the handling characteristics of light truck, its output torque is big, and hill climbing ability is strong.Simultaneously, the main gear of this change speed gear box adopts helical wheel transmission and synchronizer shift, has overcome that former three class gear box gear shift difficulty, noise are big, the shortcoming of galloping, and gear meshing performance and intensity are improved greatly.In addition, part such as most of gears is identical with the part of existing change speed gear box commonly used in this change speed gear box, can interchangeablely exchange, therefore, the buying of spare part and replacing and convenient.This change speed gear box is pressed the connection size of NJ130 change speed gear box and is made, and but has the performance of EQ140 change speed gear box, is the novel change speed gear box that a kind of performance is good, cost is low.

Below in conjunction with drawings and Examples utility model is further specified:

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

Fig. 2 is the full sectional view of synchro 13 among Fig. 1;

Fig. 3 is the full sectional view of sliding hub 9 among Fig. 1.

Please see Figure 1, the utility model mainly is made up of casing 1,

constant mesh gear

2 and 8, tween drive shaft 3,

3rd gear

4 and 11, input shaft 5, output shaft 6, toothholder 7, sliding hub 9, shift fork 10, shift fork 15, shift fork 19, declutch shift shaft 12, declutch shift shaft 16, declutch shift shaft 18, synchro 13, case lid 14, joystick 17, cliding gear 20,

second speed gear

21 and 22, reverse gear shaft 23,

reverse gearwheel

24 and 26, middle straight-tooth 25, bearing, screw etc.Structural feature of the present utility model is:

constant mesh gear

2 and 8, and

3rd gear

4 and 11,

second speed gear

21 and 22 is helical wheels; Between constant mesh gear 8 and 3rd gear 11, be provided with sliding hub 9, between 3rd gear 11 and second speed gear 21, be provided with synchro 13; Sliding hub 9, synchro 13 connect with joystick 17 through

shift fork

10,15 and

declutch shift shaft

12,16 respectively; Cliding gear 20 connects with joystick 17 through shift fork 19 and declutch shift shaft 18.

As shown in Figure 3: sliding hub 9 is internal tooth casings, has fork slot on sliding hub 9 outer toroid.Shift fork 10 inserts in this groove.

As shown in Figure 2: synchro 13 is made up of lock pin 27, sliding hub 28, friction conical ring 29, locating dowel pin 30, cone of friction dish 31, wherein cone of friction dish 31 is positioned at the outside of friction conical ring 29, through locating dowel pin 30 sliding hub 28 is installed between the two friction conical rings 29, have fork slot on these sliding hub 28 outer shrouds, shift fork 15 inserts in this groove.

As shown in Figure 1: a side of constant mesh gear 8 has boss, and the outside face of boss is distributed with thin straight-tooth.The left side of the right side of 3rd gear 11 and second speed gear 21 is a boss, is distributed with thin straight-tooth on the boss.

The utility model is performed such work:

One grade: on the basis of neutral gear position (other each grade and reverse gear are herewith), the cliding gear on the output shaft 6 20 is moved to left, make it to be meshed with middle straight-tooth 25 by joystick 17 and declutch shift shaft 18, shift fork 19.The moment of torsion that power-transfer clutch transmits driving engine promptly by input shaft 5 by

constant mesh gear

8 and 2 and middle straight-tooth 25 and cliding gear 20 pass to output shaft 6, and outwards output thus.

Second gear: by shift fork 15 sliding hub in the synchro on the output shaft 6 13 28 is moved to right, the second speed gear 21 on the output shaft 6 is meshed with second speed gear 22 on the tween drive shaft 3.Power passes to output shaft 6 through

gear

8,2,22,21 successively by input shaft 5.

Third gear: by shift fork 15 sliding hub in the synchro on the output shaft 6 13 28 is moved to left, the 3rd gear 11 on the output shaft 6 is meshed with 3rd gear 4 on the tween drive shaft 3.Power passes to output shaft 6 through

gear

8,2,4,11 successively by input shaft 5.

Fourth gear (direct speed): by shift fork 10 sliding hub on the output shaft 69 is moved to left, engage with the boss straight-tooth and the toothholder 7 of input shaft constant mesh gear 8 one sides, make input shaft 5 and output shaft 6 be unified into a rigid unitary with its internal tooth.Power is directly passed to output shaft 6 by input shaft 5, and without any other gear transmission.

Reverse gear: by joystick 17 and declutch shift shaft 18, shift fork 19 cliding gear on the output shaft 6 20 is moved to right, make it to be meshed with reverse gearwheel 26 on the reverse gear shaft 23.Power is passed to output shaft 6 through

gear

8 and 2,25 and 24,26 and 20 these three pairs of gears successively from input shaft 5, so output shaft 6 is opposite with the hand of rotation of input shaft 5.

Claims

1. automobile four-speed gear shift case, comprise casing (1), constant mesh gear (2) and (8), tween drive shaft (3), 3rd gear (4) and (11), input shaft (5), output shaft (6), toothholder (7), sliding hub (9), shift fork (19), declutch shift shaft (18), case lid (14), joystick (17), cliding gear (20), second speed gear (21) and (22), reverse gear shaft (23), reverse gearwheel (24) and (26), middle straight-tooth (25) etc., it is characterized in that: constant mesh gear (2) and (8), 3rd gear (4) and (11), second speed gear (21) and (22) they are helical wheels; Between constant mesh gear (8) and 3rd gear (11), be provided with sliding hub (9), between 3rd gear (11) and second speed gear (21), be provided with synchro (13); Sliding hub (9), synchro (13) connect with joystick (17) through shift fork (10,15) and declutch shift shaft (12,16) respectively; Cliding gear (20) connects with joystick (17) through shift fork (19) and declutch shift shaft (18).

2. automobile four-speed gear shift case according to claim 1 is characterized in that: sliding hub (9) is an internal tooth casing, has fork slot on the outer toroid of sliding hub (9).

3. automobile four-speed gear shift case according to claim 1, it is characterized in that: synchro (13) is made up of lock pin (27), sliding hub (28), friction conical ring (29), locating dowel pin (30), cone of friction dish (31), wherein cone of friction dish (31) is positioned at the outside of friction conical ring (29), through locating dowel pin (30) sliding hub (28) is installed between the two friction conical rings (29), is had fork slot on this sliding hub (28) outer shroud.

4. automobile four-speed gear shift case according to claim 1 is characterized in that: a side of constant mesh gear (8) has boss, and the outside face of boss is distributed with thin straight-tooth.

5. automobile four-speed gear shift case according to claim 1 is characterized in that: the left side of the right side of 3rd gear (11) and second speed gear (21) is a boss, is distributed with thin straight-tooth on the boss.