JP2680708B2 - Transmission gearing - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a power transmission device applied to a transmission such as an industrial vehicle such as a forklift and a construction machine such as a tire roller.

[Prior Art] FIGS. 3 and 4 are skeleton diagrams of a conventional three-stage forward three-stage reverse three-stage parallel shaft type gear transmission.

FIG. 3 is described in Japanese Examined Patent Publication No. 47-21649, and the total length of this device is determined by three clutch mechanisms, and it becomes long in the front-rear direction. Also, in order to make the input and output axes the same axis, it must be done in the transfer part a,
The number of gears and shafts used increases.

FIG. 4 is described in Japanese Examined Patent Publication No. 58-42384, and the entire length of this device can be accommodated within the width of two clutch mechanisms, but like the device of FIG. The transfer part a is required for making the shafts the same axis.

[Problems to be solved by the invention]

(1) In construction machines such as tire rollers, the gear transmission is required to have an input shaft and an output shaft on the same axis line and a short overall transmission length because of the vehicle arrangement. Generally, gear transmissions often have different input / output shaft positions, and if they are arranged on the same axis, they will be
As shown in the figure, it becomes long in the front-rear direction, causing problems such as an increase in mounting space and weight.

(2) Use a common transmission for different vehicles,
Often, only the output shaft position is changed, but even in this case, according to the prior art, even the basic cases (the transfer case a in FIG. 3 and the transmission case b in FIG. 4) must be changed. There are problems such as a low ratio of common use.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a compact transmission gear device in which the input and output shafts are on the same axis and which solves the problems (1) and (2) at the same time.

[Means for solving the problem]

As shown in FIG. 1, gears 3 and 4 meshing with the input shaft gear 2.
The intermediate shafts 13 and 14 are provided with the clutch devices 5 and 6, and the output shaft 19 is disposed on the coaxial line of the input shaft 1 while avoiding interference with these clutch devices.

The clutch devices 15 and 16 having the output shaft 19 as the central axis are provided,
The gear 7 and the gear 15, and the gear 11 and the gear 17 are meshed with each other. Intermediate shaft
22 is provided with gears 20 and 21, gear 12 and gear 20, gear 18 and gear
21 bite.

[Action]

The input shaft 1 and the output shaft 19 are arranged coaxially, and the length in the front-rear direction is shortened. The output shaft 19 has a gear 15 and a clutch.
Through the 16, the gears 11 and 17, and the gears 21 and 18, the rotational force subjected to the multi-speed shifting is transmitted.

By taking out the output from the intermediate shaft 22, the distance between the input and output shafts can be changed without adding a special device, and the application of a plurality of vehicle models becomes easy.

〔Example〕

FIG. 1 is a skeleton diagram of one embodiment of three stages of forward and backward movement, and FIG. 2 is a skeleton diagram of four stages of forward and backward movement.

In FIG. 1, power from an unillustrated prime mover is transmitted to the input shaft 1 via the torque converter 26. The gear 2 is fixed on the input shaft 1 and meshes with the gears 3, 4 on the intermediate shafts 13, 14. Gears 7, 8 and clutch devices 5, 9 and 6 and 10 are fixed to the central portions of the intermediate shafts 13 and 14, respectively. The clutch device is composed of a plurality of friction plates, mating plates and pistons, and the pistons are actuated by hydraulic pressure to press the multi-plate clutches, and the gears 3, 4, 11, 12 are rotatably held on their respective intermediate shafts. It is of a known type in which it is brought into a coupled state through a spline portion at one end of the. On the output shaft 19, a similar clutch device, a gear 15 having a spline at one end and rotatably held on the shaft, and gears 17, 18 are fixed. Gears 20 and 21 are fixed to the intermediate shaft 22, and the gear 20 meshes with the gear 12 on the intermediate shaft 14,
21 meshes with gear 18 on output shaft 19.

Further, the gear 7 on the intermediate shaft 13 meshes with the gear 8 on the intermediate shaft 14 and the gear 15 on the output shaft 19, and the gear 11 on the intermediate shaft 13 meshes with the gear 17 on the output shaft 19. ing.

 Next, the operation of the present apparatus will be described.

By engaging one of the clutch devices 5 and 6 and one of the clutch devices 9, 10 and 16, a total of two clutch devices, a gear ratio of three forward gears and three reverse gears can be obtained. Table 1 shows examples of combinations of each member. The clutch devices 5 and 6 are for selecting forward and backward movement, but they can be reversed if necessary.

(1st forward speed) When the clutch devices 5 and 10 are operated,
The power of the input shaft 1 is gear 2 -gear 3 -clutch device 5-
It is transmitted to the output shaft 19 via the gear 7-gear 8-the clutch device 10-gear 12-gear 20-gear 21-gear 18, and the input shaft 1
And rotate in the same direction.

(2nd forward speed) When the clutch devices 5 and 9 are operated,
The power of the input shaft 1 is gear 2 -gear 3 -clutch device 5-
It is transmitted to the output shaft 19 via the clutch device 9-gear 11-gear 17, and rotates in the same direction as the input shaft 1.

(3rd forward speed) When the clutch devices 5 and 16 are operated,
The power of the input shaft 1 is gear 2-gear 3-gear 7-gear 15-
It is transmitted to the output shaft 19 through the clutch device 16 and rotates in the same direction as the input shaft 1.

(First reverse speed) When the clutch devices 6 and 10 are operated,
The power of the input shaft 1 is gear 2-gear 4-clutch device 6-
It is transmitted to the output shaft 19 through the clutch device 10-gear 12-gear 20-gear 21-gear 18 and rotates in the opposite direction to the input shaft 1.

(2nd reverse speed) When the clutch devices 6 and 9 are operated,
The power of the input shaft 1 is gear 2-gear 4-clutch device 6-
It is transmitted to the output shaft 19 via the gear 8-the gear 7-the clutch device 9-the gear 11-the gear 17 and rotates in the opposite direction to the input shaft 1.

(3rd reverse speed) When the clutch devices 6 and 16 are operated,
The power of the input shaft 1 is gear 2-gear 4-clutch device 6-
It is transmitted to the output shaft 19 via the gear 8-gear 7-gear 15-clutch device 16 and rotates in the opposite direction to the input shaft 1.

Next, the forward / backward four-speed transmission shown in FIG. 2 will be described.

As shown in FIG. 2, the clutch device 23 and the gears are mounted on the intermediate shaft 22.
By adding 24, a transmission with four forward gears and four reverse gears can be easily configured.

 Table 2 shows examples of combinations of the respective members.

In this example, the intermediate shaft 22 and the output shaft 19 are connected by the gear 21 and the gear 18, but the gear 20 may be meshed with the gear 17 or the gear 18, or the gear 21 may be meshed with the gear 17. The same effect can be obtained.

Further, it is possible to reduce the number of gear stages by reducing any number of the clutch devices 9, 10, 16, 23. Especially in the case of two forward gears and two reverse gears, the clutch devices 10, 23 of FIG.
By removing the gears 12, 18, 21, 22, 24, and the intermediate shaft 22, the number of parts can be greatly reduced, reducing the weight.
This leads to a reduction in manufacturing costs.

Although the output shaft is the shaft 19 in both FIGS. 1 and 2, even if it is output from the intermediate shaft 22, the transmission has the same number of gears and the same gear ratio. Therefore, by adjusting the positions of the shafts 19 and 22 to the output shaft positions in advance, they can be mounted on a plurality of vehicles having different output shaft positions.

〔The invention's effect〕

The transmission gear device according to the present invention includes an input gear 2 driven by an input shaft 1, a second gear 3 and a third gear 4 meshing with the input gear 2, and an intermediate shaft 13 common to the second gear 3. A fifth gear 11 rotatably held coaxially with a fourth gear 7 fixed to the third gear 4, and an intermediate shaft 14 common to the third gear 4.
The seventh gear 12 rotatably held coaxially with the sixth gear 8 fixed to the, the eighth gear 15 meshing with the fourth gear 7, and the eighth gear 15 The ninth gear 17 and the tenth gear 18, which are fixed to the output shaft 19, and the seventh gear 12
An eleventh gear 20 that meshes with the eleventh gear and an intermediate shaft common to the eleventh gear 20
12th fixed on 22 and meshed with 10th gear 18
Gear 21, a first clutch device 5 for connecting the second gear 3 and the fourth gear 7, and a second clutch for connecting the fourth gear 7 and the fifth gear 11. Device 9 and third
The third clutch device 6 capable of connecting the fourth gear 6 and the sixth gear 8, the fourth clutch device 10 capable of connecting the sixth gear 8 and the seventh gear 12, and the eighth clutch device 8. Gears 15 and 9
A fifth clutch device 16 which can be connected to the gear 17 of the third gear device 6, and a fourth gear device 7 directly connected to the first clutch device 5 and the second clutch device 9 and a third clutch device 6 And the sixth gear 8 directly coupled to the fourth clutch device 10 is adapted to mesh with the eighth gear 15 directly coupled to the fifth clutch device 16 so that two gears are thereby provided. The gears connected to the clutch device directly mesh with the gears connected to the other clutch devices to reduce the number of gears and shafts and to make the space of the transmission gear device compact.

[Brief description of the drawings]

FIG. 1 is a skeleton diagram of a forward / reverse 3 speed transmission gear device according to the present invention, FIG. 2 is a skeleton diagram of a forward / reverse 4 speed transmission gear device according to the present invention, and FIG. 3 is a skeleton showing a conventional parallel shaft type gear device. FIG. 4 and FIG. 4 are skeleton diagrams showing another conventional parallel shaft type gear device. 1 …… Input shaft 2,3,4,7,8,11,12,15,17,18,20,21 …… Gear 5,6,9,10,16 …… Crutch 13,14 …… Intermediate shaft , 19 ... Center axis and output axis

Claims (1)

(57) [Claims] 1. An input gear 2 driven by an input shaft 1,
A second gear 3 and a third gear 4 that mesh with the input gear 2;
A fifth gear 11 rotatably held coaxially with a fourth gear 7 fixed to an intermediate shaft 13 common to the second gear 3.
And a seventh gear which is rotatably held coaxially with a sixth gear 8 fixed to an intermediate shaft 14 common to the third gear 4.
12, an eighth gear 15 that meshes with the fourth gear 7, a ninth gear 17 and a tenth gear 18 that are fixed to an output shaft 19 common to the eighth gear 15, and a seventh gear 15. Eleventh gear meshing with gear 12
20, a twelfth gear 21 fixed on an intermediate shaft 22 common to the eleventh gear 20 and meshing with the tenth gear 18, a second gear 3 and a fourth gear 7. The first clutch device 5 that can be connected, the second clutch device 9 that can connect the fourth gear 7 and the fifth gear 11, and the third gear 4 and the sixth gear 8 The third clutch device 6 which can be connected, the fourth clutch device 10 which can connect the sixth gear 8 and the seventh gear 12, the eighth gear 15 and the ninth gear 17 A fourth gear 7, which comprises a fifth clutch device 16 which can be connected and is directly connected to the first clutch device 5 and the second clutch device 9, and a third clutch device 6 and a fourth clutch device 7. A sixth gear 8 directly connected to the device 10 and an eighth gear 15 both directly connected to the fifth clutch device 16
A speed change gear device characterized in that it meshes with a gear.