JPS61127949A - Shift for vehicles - Google Patents

Abstract

PURPOSE:To make operation on a control lever ever so smooth, by installing each pulley, rotating proportionally, in a rotary shaft of the control lever and a cam drum respectively, while connecting both pulleys together in an interlocking manner via an operating wire being rolled on each pulley. CONSTITUTION:A shift is provided with a control lever 10, a cam drum 24 and shift forks 27a and 27b, while each of pulleys 16 and 29 is installed in a rotary shaft 12 of the control lever 10 and the cam drum 24, which pulleys rotate in proportion to these elements all the time. Both pulleys are interlockingly connected together via operating wires 11 and 11' being rolled on each pulley. Therefore, an operated variable in the control lever and a traveled variable in the operating wire are portionable so that smooth controllability is securable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a transmission device for a vehicle that performs a transmission operation using an operating lever inside a vehicle interior.

[Prior art]

In small vehicles called community cars, it is necessary to make the cabin space as wide as possible while reducing the outer diameter, so the transmission gear device is placed as far away from the seat as possible, and it is connected via operating wires. It is designed to be operated remotely using a control lever near the seat. The above operating wire is connected to the operating lever via an arm fixed at right angles to the rotating shaft, and is also connected to an arm fixed at right angles to the operated shaft on the speed change gear device side. It is configured to be connected.

However, according to the above configuration, the angle (included angle) between the arm fixed to the rotating shaft of the operating lever and the operating wire connected to it changes depending on the operating angle of the operating lever, and accordingly, the operation becomes difficult. The operating amount of the lever and the moving amount of the operating wire are not proportional to each other. Therefore, the operating load applied to the operating lever changes as the operating angle changes, making it difficult to obtain smooth operability.

In particular, when there are four or more shift switching points (for example, four switching points of neutral, forward, low-speed forward, and reverse), there is a drawback that the switching positions of the operating lever cannot be equally distributed.

[Purpose of the invention]

An object of the present invention is to provide a vehicle gear shift system that uses a simple structure to make the amount of operation of a control lever proportional to the amount of movement of a control wire, thereby enabling smooth operability of the control lever and equal distribution of switching positions. The goal is to provide equipment.

[Structure of the invention]

To achieve the above object, the present invention transmits engine output to the drive wheels via a transmission gear, and shifts the gear of the transmission gear by moving a shift fork by rotating a cam drum that is linked to an operating lever inside the vehicle. The vehicle is characterized in that the rotating shaft of the operating lever and the cam drum are each provided with a pulley that rotates proportionally thereto, and both pulleys are interlocked and connected via an operating wire wound around each pulley. It is.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the drawings.

In the small vehicle shown in Fig. 5, 1 is the body frame, 2
is the body. In the front, a pair of left and right steering front NI3,
3 is provided and operated by a steering handle 4. An engine 5 and a gear transmission 6 are integrally mounted on the rear part. A rear wheel 7 is supported by the gear transmission 6 as a driving wheel. The engine 5 and gear transmission 6, which are integrally coupled, are connected to the vehicle body frame 1 at the front end via an elastic material (not shown), and are elastically supported by a shock absorber 8 at the rear end. The output of the engine 5 is transmitted to the gear transmission 6 via the belt 9, and the speed change of the gear transmission 6 is remotely controlled via the operating wire 11 using the operating lever 10 provided on the side wall of the vehicle interior. be done.

FIGS. 1 to 4 show an embodiment of a transmission device of the present invention, which is comprised of the above-mentioned operating lever 10 and gear transmission device 6. As shown in FIG.

The operating lever 10 can be rotated around a rotating shaft 12 to four shift positions: neutral N, forward, low speed forward, and reverse R.

The rotating shaft 12 is rotatably supported by a bearing tube 13, and the bearing tube 13 is fixed to a wall surface 14 forming the inside of the body 2 via a metal fitting 15. A pulley 16 is fixed to the shaft end of the rotating shaft 12 that passes through the back side of the wall surface 14. A pair of left and right operating wires 11.11 are wound in opposite directions in the outer circumferential groove of this boo '716, and each end is locked to the pulley 16 via a locking upper part 11a. The pair of operating wires 11.11 pass through the outer wires llb and 11b, respectively, and extend to the gear transmission 6 at the rear of the vehicle body.

A regulating lever biased by a spring 17 is swingably supported inside the operating lever 10, and its lower end engages with a notch provided in a plate 19. This engagement restricts the operation lever 10 from switching from neutral N to reverse R and to low-speed forward movement. This regulation of the operating lever 10 is released by pushing in the push-in knob 20 and removing the regulation lever 18 from the notch in the plate 19.

On the other hand, the gear transmission 6 has a vertically elongated gear case 21,
As shown in FIG. 4, an input shaft 22. A cam drum 24 for shift operation having a cam groove on the surface of the gear shift shaft 232 is rotatably supported. Also, there is a support shaft 25 that slidably supports the reverse idle gear 26, and a pair of shift forks 27a that engage with the cam groove of the cam drum 24.
, 27b is provided to slidably support the shifter shaft 28.

The cam drum 24 has one shaft end projected outside the gear case 21, and a pulley 29 is fixed to the projecting end.

A pair of operating wires 11° are provided in the outer peripheral groove of this pulley 29.
The wires 11'' are wound in opposite directions, and their ends are locked to a pulley 29 via a locking upper 11b'. Because it is smaller than the pulley 16, it is wound twice. The operating wires 11', 11.
° are connected via joints 30 and 30 to operating wires 11 and 11 extending from the operating lever 10 side, respectively. The joint 30 elastically connects both operating wires 11.11'' via a spring 31 to absorb elongation due to tension.

The pulley 29 also has five bins 40 arranged at equal intervals around its outer circumference.
is planted, and a cam follower 41 is in elastic contact with this bottle 4o. The cam follower 41 connects two adjacent bins 40
．． 40, the pulley 29 is set to neutral N.
, moving forward.

It is a moderation mechanism that moves forward at low speed and holds it at each position of reverse R.

The output of the engine 5 is manually supplied to the input shaft 22 via a continuously variable transmission 34 and a centrifugal clutch 35 . The continuously variable transmission 34 includes a pulley 32 whose groove width changes depending on the rotation speed,
33, and a V-belt 9 wound around this. The rotation of input shaft 22 is transmitted to transmission gear shaft 23 via gears 36,37. Reduction pinion gears 38a and 38b are rotatably supported on the speed change gear shaft 23, and a slider 39 is supported slidably in the axial direction between the reduction pinion gears 38a and 38b. The shift fork 27b is engaged with the slider 39, and the gear shift shaft 2
Smooth sliding is achieved through a ball 40 installed in the axial groove of No. 3. The left and right ends of the slider 39 and the reduction gears 38a and 38b each form a dog clutch. Therefore, when the slider 39 is selectively engaged with either one, the rotation of the speed change gear shaft 23 is transmitted via the slider 39 to the reduction gear 38a or 38b.

Further, among the reduction gears 38a, the gear 42 has a larger number of teeth than the gear 38a. This gear 42 is a reverse play gear 26 that engages with the shift fork 27a.
When one of the gears 26a is shifted as shown by the chain line in FIG. 4, it meshes with the gear 26a. Further, when the shift full oak 27a shifts the idle gear 26 to the position indicated by the chain line, the other gear 26b meshes with the gear 49 of the input shaft 22.

The two small reduction gears 38a and 38b are meshed with large reduction gears 43a and 43b having different numbers of teeth, respectively.

Both large reduction gears 43a and 43b form part of a differential gear box 44. A support shaft 45 fixed in the differential gear box 44 rotatably holds a differential pinion 46.
This differential small gear 46 has a pair of differential large gears 47a from the left and right.
, 47b are in mesh with each other. Left and right differential gears 47a, 4
7b has left and right rear wheels fi48 a, 4, respectively.
The inner ends of the rear wheel shafts 48a and 48b are connected to each other, and rear wheels 7, 7, which are driving wheels, are fixed to the outer ends of the rear wheel shafts 48a and 48b, respectively.

The differential gear box 44 also includes a gear 5 as shown in FIG.
0 is provided to rotate integrally with the speed hand, and rotation to the speed hand is taken out through a screw gear 51 meshed with this gear 50.

In the above transmission, when the operating lever 1o is in the neutral position, the slider 39 does not mesh with either of the reduction gears 38a, 38b, and the reverse idler gear 26 is in the state shown by the solid line in FIG. 4. Therefore, the input shaft 22 and the speed change gear shaft 23 only idle.

When the operating lever 10 is moved to the forward position, the cam drum 2
4, the shift fork 27b engages the slider 39 with the reduction gear 38b.

Therefore, the input shaft 22 rotates through the speed change gear shaft 23° and the slider 39. The rear wheel shaft 48a passes through the small reduction gear 38b, the large reduction gear 43b, and the differential gear box 44.

48b.

When the operating lever 10 is placed in the low speed forward position, the cam drum 24 causes the shift fork 27a to engage the slider 39 with the reduction gear 38a. Therefore, the input shaft 22
The rotation is caused by the speed change gear shaft 23, slider 39. Reduction pinion gear 3
8a, a large reduction gear 43a, and a differential gear box 44, the signal is transmitted to rear wheel shafts 48a and 48b.

When the operating lever 10 is placed in the reverse R position, the slider 39 becomes a neutral position in which it does not mesh with any of the reduction gears 38a and 38b, and the reverse idler gear 26 moves to the position indicated by the chain line. Therefore, the rotation of the input shaft 22 is controlled by the gear 49. Idle gear 2G is transmitted to @wheel 42, and further reduced to small gear 3
3a, the rear wheel shaft 48a via the reduction large gear 43a.

Rotate 48b in the opposite direction.

The above-mentioned cam drum 24 is driven by rotating the operating lever 10, pulling one of the operating wires 11, 11 wound around the pulley 16 of the rotating shaft 12, and loosening the other, thereby moving the joints 30, 30. ．． operation wire 11',
11'.

This is done forcibly via the Boo IJ29. At this time, the amount of movement of the operating wire 11 is proportional to the outer circumferential length of the rotation of the pulley 16 of the operating lever 10. That is, the amount of operation of the operating lever 10 and the amount of movement of the operating wire 11 are in a proportional relationship, and the pulley 29 on the cam drum 24 side also rotates in proportion to the amount of movement of the operating wires 11 and 11'.

Therefore, the operating load applied to the cam drum 24 by the operating lever 10 does not change depending on the operating angle, but is uniform by 1 degree, thereby allowing smooth operation. Further, due to such a proportional relationship, even if there are four or more shift switching points, the switching positions by the operating lever 10 can be equally distributed.

Furthermore, as in the embodiment, if the operating wire 11, 11' is provided with an elastic joint 30 having a spring 31,
Even if the gears or dogs do not mesh well due to collision between gears when changing gears, if the elastic joint 30 is extended against the elastic force and the operating lever 10 is set at a predetermined position, then one of the gears or dogs will not mesh properly. By rotation, the elastic force allows automatic engagement.

In addition, in the embodiment described above, the pulley 16 is connected to the operating lever 1.
The pulley 29 is directly fixed to the shaft end of the rotary shaft 12 of the cam drum 24, and the pulley 29 is directly fixed to the shaft end of the rotary shaft 12 of the rotary shaft 12 and the cam drum 24, respectively. It may also be indirectly attached via an idle gear or the like.

Furthermore, as the operating wire 11.11'' connecting the pulley 16 of the operating lever 10 and the pulley 29 of the cam drum 24, a pair of wires wound in opposite directions is used, but a return spring etc. If used together with
They may be connected to each other by a single wire.

〔Effect of the invention〕

As described above, the present invention transmits engine output to the driving wheels via a transmission gear, and shifts the gear of the transmission gear by moving a shift fork by rotating a cam drum that is interlocked with an operating lever inside the vehicle. In vehicles carried out by
The rotary shaft of the operating lever and the cam drum are each provided with a pulley that rotates proportionally to them, and the two pulleys are interlocked and connected via an operating wire wound around each pulley, so that the amount of operation of the operating lever can be adjusted. The amount of movement of the operating wire can be made proportional, thereby achieving equal distribution of switching positions of the operating lever and smooth operability.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the operating lever and transmission gear device of the transmission device of the present invention with parts omitted, FIG. 2 is a longitudinal sectional view showing the operating lever portion of the same device, and FIG. 3 is the same. A side view of the transmission gear unit of the device seen from the side opposite to that shown in Figure 1, Figure 4 is an exploded sectional view showing the inside of the transmission gear unit, and Figure 5 is a side view of the transmission gear unit. It is a schematic side view of the small vehicle provided. 5...Engine, 6...Transmission gear device, 7...
・Rear wheel (drive wheel), 9...belt, 10...operation lever, 11.11°...operation wire,
16゜29...Pulley, 24...Cam drum,
27a. 27b...Shift fork, 30...Joint.

Claims (1)

[Claims] Transmits engine output to the drive wheels via a transmission gear system,
In a vehicle in which the speed change of the speed change gear device is performed by moving a shift fork by rotation of a cam drum interlocked with an operating lever in a vehicle interior, a pulley that rotates proportionally to the rotating shaft of the operating lever and the cam drum is provided, respectively. What is claimed is: 1. A transmission device for a vehicle, characterized in that the two pulleys are interlocked and connected via an operating wire wound around each pulley.