CN101592211A - Light-duty automobile transmission with main and auxiliary cases - Google Patents

Abstract

The light automobile transmission with main and auxiliary boxes of the present invention is an intermediate shaft type fixed shaft transmission structure. The gear positions of the transmission are 4 forward gears and 1 reverse gear, and full helical gear meshing transmission is adopted; the third and fourth gears adopt lock ring type synchronizer shifting, and the first, second and reverse gears adopt meshing sleeve shifting. The auxiliary transmission is also a fixed shaft transmission structure, divided into high and low gear positions, and adopts lock ring type large capacity synchronizer shifting. The high and low gear area conversion is automatically operated and switched by the air valve. The main and auxiliary transmissions are combined to form a transmission configuration of 8 forward gears and 2 reverse gears. The present invention has the advantages of large carrying capacity, a large number of gear positions, speed ratio matching according to offset geometric series distribution, main and auxiliary box linkage operation, environmental protection and energy saving, etc. It has strong adaptability to various working conditions and road conditions and can better meet the current domestic automobile development needs.

Description

Light-duty automobile transmission with main and auxiliary cases

technical field

The invention discloses a light-duty automobile transmission with a main box and an auxiliary box, belonging to the technical field of auto parts.

Background technique

The current domestic light-duty car transmission with auxiliary box has only one gear available in the low gear area (the speed ratio of the other gears is repeated), and when switching between high and low gears, it is necessary to stop and change gears, which is inconvenient to operate, difficult to change gears, and the actual number of available gears Problems such as small size and high fuel consumption can no longer meet the needs of the rapid development of domestic light vehicles.

Contents of the invention

In order to solve the above problems, the present invention provides a light-duty vehicle transmission with main and auxiliary boxes, which has compact structure, multiple gears, large speed ratio range, reasonable matching, good meshing performance, and low price, and can meet the development needs of light-duty vehicles.

In order to achieve the above object, the technical solution adopted in the present invention is:

A light-duty automobile transmission with main and auxiliary cases, including a main transmission case, a rear case of an auxiliary transmission connected behind the case,

The first shaft of the main transmission is supported on the housing through a full cylindrical roller bearing with a stop ring on the outer ring; one end of the second shaft is supported on the inner hole of the first shaft by a full roller bearing, and the other end is through the outer Cylindrical roller bearings with stop rings are supported on the housing, each gear gear is vacantly sleeved on the second shaft through needle bearings, and each gear shifting mechanism is fixed on the second shaft through splines; the intermediate shaft passes through the cylinder The roller bearings are supported on the shell, the first and second speed gears are integrated with the intermediate shaft, and the other gears are installed on the intermediate shaft through shrink sleeves, and mesh with the gears on the second shaft one by one; the main transmission The idler shaft is located under the intermediate shaft and is directly supported on the housing. The idler is vacantly sleeved on the idler shaft through a needle bearing, with wear pads on both sides, and the idler meshes with the first gear on the intermediate shaft at the same time. The reverse gear meshes on the second shaft; the third and fourth gears are shifted by a lock ring synchronizer, and the first, second and reverse gears are shifted by an engaging sleeve; combined with the upper cover assembly and the top cover assembly, the main transmission is realized. inverted function;

The rear casing is directly connected with the casing, the auxiliary transmission input gear is fixed on the second shaft of the main transmission through a spline, one end of the output shaft is supported on the second shaft by a full roller bearing, and the other end is supported by a cylindrical roller bearing On the fixed rear casing; the auxiliary transmission double transmission gear meshes under the output gear on the output shaft; the two ends of the auxiliary transmission double transmission gear pass through tapered roller bearings, one end is supported on the casing, and the other end is supported on the rear casing On the body; a high-low gear shift synchronizer assembly is arranged between the input gear and the output gear, and a pneumatic shift mechanism controlled by a shift handle is arranged above the high and low gear shift synchronizer assembly.

The reverse tooth seat on the second shaft is integrated with the second shaft.

The high and low gear gear seats and the output shaft are integrated in the auxiliary transmission.

The main transmission and the auxiliary transmission are all helical gear meshing transmissions.

On the intermediate shaft of the main transmission of the present invention, the gears of the first and second speeds are integrated with the intermediate shaft; the rest of the gears on the intermediate shaft are shrunk on the shaft, and are meshed with the gears and idler gears on the first shaft and the second shaft respectively. Under the action of synchronous shifting or meshing sleeve shifting mechanism, it constitutes the four-forward and one-reverse transmission system of the main transmission; the input gear of the auxiliary transmission is sleeved on the second shaft of the main transmission, and the output gear is idle on the output shaft, respectively. The dual transmission gears on the transmission mesh with each other; under the action of the shift valve, the automatic switching between the high and low gear ranges of the transmission is realized through the pneumatic shift mechanism. Thus, the eight fronts and two reverse functions in the strict sense of the transmission are realized.

After adopting the above scheme, the present invention is a three-stage transmission with six shafts and eight gears, which realizes the power output of eight fronts and two reverses, and the maximum input torque is 450N.m. The new structure has the advantages of large load-carrying capacity, large number of gears, speed ratio matching according to the distribution of offset equal ratio series, linkage operation of main and auxiliary boxes, environmental protection and energy saving, etc., and has strong adaptability to various working conditions and road conditions, and can be compared Well meet the current domestic automobile development needs.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a preferred embodiment of the present invention;

Fig. 2 is an enlarged view of a part not shown in Fig. 1 .

Detailed ways

Shown in conjunction with Fig. 1, Fig. 2, the light-duty automobile transmission with main and auxiliary case of the present invention, comprises the housing 3 of main transmission, the rear case 14 that is connected in the auxiliary transmission of housing 3 rears.

The first shaft 1 of the main transmission is supported on the housing 3 through a full cylindrical roller bearing 2 with a snap ring on the outer ring. One end of the second shaft 4 is supported on the inner hole of the first shaft 1 by a full roller bearing, and the other end is supported on the housing 3 by a cylindrical roller bearing 7 with a stop ring on the outer ring. Bearings are vacantly sleeved on the second shaft 4, and each shifting mechanism is fixed on the second shaft 4 by splines. The intermediate shaft 16 is supported on the housing 3 through cylindrical roller bearings. The first and second speed gears are integrated with the intermediate shaft 16. The gears mesh one by one. The idler shaft 19 of the main transmission is located below the intermediate shaft 16 and is directly supported on the housing 3. The idler 18 is vacantly sleeved on the idler shaft 19 through a needle bearing, with wear pads on both sides, and the idler 18 is in the middle The first gear 23 on the shaft 16 meshes with the reverse gear 15 on the second shaft 4 at the same time. 3rd and 4th gears are shifted by lock ring synchronizer, 1st, 2nd and reverse gears are shifted by meshing sleeve. Combining the upper cover assembly 5 and the top cover assembly 6 to realize the four-forward-one-inversion function of the main transmission. What needs to be further explained here is that, in order to reliably ensure the strength of the teeth and shaft parts, and to meet the needs of selecting a large-capacity synchronizer, the tooth seat of the reverse gear 15 on the second shaft 4 is integrated with the second shaft 4 .

Under the action of the selection and shift lever of the top cover assembly 6, the shift fork system in the top cover assembly 5 starts to move back and forth, driving the gears on the synchronizer shift mechanism or the meshing sleeve shift mechanism between the gears. The sleeve moves back and forth, combined with the spline on the synchronous cone of a certain gear, so that the idle sleeve gear of a certain gear on the first shaft 1 or the second shaft 4 is integrated with the second shaft 4, and the gear on the main transmission is realized. bit power output to the auxiliary transmission. When the reverse gear sleeve moves forward and engages with the spline on the second shaft 4, the power passes through the first shaft 1 to the reduction gear 21, to the intermediate shaft 16, to the idler gear 18, to the reverse gear 15, and to the second shaft 4 , and finally output to the auxiliary transmission through the auxiliary case input gear 8.

The rear housing 14 is directly connected to the housing 3 . The auxiliary transmission input gear 8 is fixed on the second shaft 4 of the main transmission through splines, one end of the output shaft 12 is supported on the second shaft 4 by a full roller bearing, and the other end is fixed by a cylindrical roller bearing 11 on the rear casing 14 superior. The output gear 10 on the output shaft 12 is meshed with an auxiliary transmission duplex transmission gear 22 . Two ends of the auxiliary transmission duplex transmission gear 22 pass through tapered roller bearings, one end is supported on the housing 3 , and the other end is supported on the rear housing 14 . A high-low shift synchronizer assembly 9 is arranged between the input gear 8 and the output gear 10 , and a pneumatic shift mechanism 17 controlled by a shift handle 20 is arranged above the high-low shift synchronizer assembly 9 . The high and low gear gear holders and the output shaft 12 are integrated in the auxiliary transmission. The main transmission and auxiliary transmission are fully helical gear meshing transmission.

Toggle the wrench on the gear shift handle 20 to control the air circuit conversion of the high and low gear shift valves. Under the action of compressed air, the pneumatic gear shift mechanism 17 moves back and forth, driving the high and low gear shift synchronizer assembly 9 to realize the high and low gear shift. Low range transitions. Thus finally realize the eight front two reverse functions of the speed changer. If the transmission is to work in the low gear range, the pneumatic shift mechanism 17 moves backward, driving the gear sleeve on the high and low gear shift synchronizer assembly 9 to move backward and combine with the output gear 10, at this time the output gear 10 and the output shaft 12 are integrated , the power passes through the auxiliary transmission input gear 8 to the duplex transmission gear 22 , to the output gear 10 , to the output shaft 12 , and is output through the output flange 13 .

In the present embodiment, the transmission has 8 forward gears and 2 reverse gears. The maximum speed ratio of the forward gear is 12.26, and the speed ratio of the reverse gear is 10.82; the third and fourth gears of the main transmission are shifted by lock ring synchronizers, and the first, second and reverse gears are shifted by meshing sleeves. The auxiliary transmission is divided into two gears, high and low, and the large-capacity lock ring synchronizer is used to shift gears to realize high and low range conversion.

In this embodiment, six-axis, eight-gear and three-stage transmission are adopted, all of which adopt helical gear meshing transmission, so as to realize the power output of eight fronts and two reverses.

The above-mentioned embodiments are only used to explain the inventive concept of the present invention, but not to limit the protection of the rights of the present invention. Any insubstantial changes made to the present invention by using this concept should fall within the scope of protection of the present invention.

Claims (4)

1, a kind of light vehicle transmission with major and minor case, comprise basic trnasmission housing (3), be connected the rear case (14) of the auxiliary transmission at housing (3) rear, it is characterized in that:

First (1) of described basic trnasmission is bearing on the housing (3) by the full roller bearing (2) of outer astragal stop ring; Second (4) one end is bearing on the endoporus of first (1) by full type roller bearing, the other end is bearing on the housing (3) by the roller bearing (7) of outer astragal stop ring, each shifting gear is enclosed within on second (4) by the needle bearing sky, and each gearshift mechanism is fixed on second (4) by spline; Jack shaft (16) is bearing on the housing (3) by roller bearing, and one, two-speed gear and jack shaft (16) be made of one, all the other each grade gears are installed on the jack shaft (16) by hot jacket, go up the corresponding one by one engagement of each grade gear with second (4); The idler shaft of basic trnasmission (19) is positioned at the below of jack shaft (16) and directly is bearing on the housing (3), idle pulley (18) is enclosed within on the idler shaft (19) by the needle bearing sky, both sides have holds the mill pad, and the engagement of the one grade of gear (23) on idle pulley (18) and the jack shaft (16); Three, fourth gear adopts the lock ring type synchronizer shift, and one, two, reverse gear adopts collar shift; Realize basic trnasmission four last functions in conjunction with last cap assembly (5) and top cover assembly (6);

Described rear case (14) directly is connected with housing (3), auxiliary transmission input gear (8) is fixed on second (4) of basic trnasmission by spline, output shaft (12) one ends are bearing on second (4) by full type roller bearing, and the other end passes through on the fixing rear case (14) of roller bearing (11); Output gear (10) below on the output shaft (12) is engaged with auxiliary transmission duplex driving gear (22); Auxiliary transmission duplex driving gear (22) two ends are by tapered roller bearing, and an end bearing is on housing (3), and the other end is bearing on the rear case (14); Be provided with high and low shift synchromesh unit assembly (9) between input gear (8) and the output gear (10), the top of high and low shift synchromesh unit assembly (9) is provided with the compressed air gearshift (17) by gear shifting handle (20) control.

2, the light vehicle transmission with major and minor case as claimed in claim 1 is characterized in that: reverse gear toothholder and second (4) on described second (4) are made of one.

3, the light vehicle transmission with major and minor case as claimed in claim 2 is characterized in that: high and low shift toothholder and output shaft (12) are made of one in the described auxiliary transmission.

4, the light vehicle transmission with major and minor case as claimed in claim 3 is characterized in that: described basic trnasmission, auxiliary transmission are full helical gear engagement driving.

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