TWI469893B - Construction of vehicle transmission - Google Patents

Description

Vehicle transmission structure

The present invention relates to a vehicle transmission configuration, and more particularly to a transmission configuration suitable for a locomotive.

The power system and the transmission system are two important parts of the locomotive. The former is usually an internal combustion engine or a motor, while the latter has various designs such as a belt type stepless transmission mechanism, a pure gear type mechanism or the like.

The manner in which the conventional engine and the transmission mechanism are assembled is as follows. The crankcase is locked with the box of the receiving transmission mechanism, and then the whole is interlocked with the cylinder block of the engine, and finally the engine is suspended at a single point in the frame, as shown in Fig. 1 of the locomotive 90. In addition, the crankcase is connected to the shock absorber. Therefore, when the rear wheel moves up and down, the cylinder head, the cylinder block, the crankcase and the transmission mechanism case are swung with the suspension point as a pivot point.

Under the above facts, according to the general physical principle, the weight of the heavy object is also large, so the conventional design makes the stability of the vehicle greatly negative when the vehicle is walking, and also means that the rider does not control easily, and increases the safety concerns. . In addition, if the prior art is used, it is necessary to reserve the space for the engine and the transmission mechanism to sway, thus losing the flexibility of other component configurations, and obviously, the rocking motion will also accelerate the damage of the related device.

The main object of the present invention is to provide a vehicle transmission structure that can reduce the vibration problem during driving, thereby improving the problem of conventional driving instability and difficulty in handling.

To achieve the above object, the vehicle transmission structure of the present invention includes a cylinder block, a crankcase, a stepless transmission, and a gear transmission. The cylinder block is suspended and fixed on the frame of the vehicle, and the crankcase is suspended from the frame in addition to the cylinder block. The crankcase also houses a crankshaft that is free to pivot.

The above-mentioned stepless gearbox assembly is fixed to the crankcase and is provided with a stepless shifting mechanism. The stepless shifting mechanism includes an input shaft coupled to the rotary power and an output shaft coupled to the crankshaft.

The gear shifting gear houses a gear shifting mechanism. The gear shifting mechanism is coupled to the output shaft of the stepless shifting mechanism. In particular, the gearbox is pivoted to the stepless gearbox to define a pivot axis and the pivot axis is a parallel output shaft.

The invention is characterized in that not only the structural design is simple and uncomplicated, but also plays a role in limiting the swinging during driving to the gear transmission and excluding the cylinder head, the cylinder block, the crankcase and even the stepless gearbox, thereby improving the riding stability. And handling. In addition, because the engine is no longer oscillating, it also reduces its internal component loss factor.

The vehicle transmission structure of the present invention may further include a wheel, a shock absorber and an arm, wherein the wheel is coupled to the gear shifting mechanism, the arm includes a first end and a second end, and the first end is pivoted at none The segment gearbox has a second end connected to the wheel and the shock absorber. And the first end is pivotally disposed on the stepless gearbox through a bearing. Furthermore, the gearbox may include a pivoting portion pivoted through the bearing to the stepless gearbox.

The gear shifting mechanism can include a parallel plurality of gear shifting shafts. The stepless shifting mechanism can be a belt type stepless shifting mechanism.

The vehicle transmission structure may further include a clutch system disposed between the stepless shifting mechanism and the gear shifting mechanism for selectively transmitting the rotary power of the stepless shifting mechanism to the gear shifting mechanism.

Referring to Figures 2 and 3, there is shown a side view and a cross-sectional view of a vehicle transmission of a preferred embodiment. The vehicle transmission structure is mounted on a frame 40. The vehicle transmission structure mainly includes a cylinder head 11, a cylinder head 12, a cylinder block 13, a crankcase 14, a stepless gearbox 20, and A gearbox 21. The cylinder head 11 is assembled and fixed to the top of the cylinder head 12 to cover it. The fixed cylinder block 13 and the crankcase 14 are sequentially assembled from the bottom of the cylinder head 12.

A piston rod set 16 is operatively disposed within the cylinder block 13. The crankcase 14 is fixedly coupled to the bottom of the cylinder block 13 in a locking manner. Two bearings 51, 52 are embedded in the crankcase 14. A crankshaft 15 is mounted on the two bearings 51, 52 to be freely rotatable. The piston rod set 16 is coupled to the crankshaft 15 to cause the crankshaft 15 to rotate by a reciprocating displacement of the piston rod set 16 due to a combustion explosion.

The stepless transmission 20 is internally provided with a stepless shifting mechanism 22. In this example, the stepless shifting mechanism 22 is a belt type stepless shifting mechanism including an input shaft 23, a V-belt 25 and an output shaft 24. The input shaft 23 is coupled to the crankshaft 15 for synchronous rotation, and the belt 25 will The input shaft 23 is rotationally transmitted to the output shaft 24. Since the belt type stepless speed change mechanism is known, the relevant details will not be described herein. In particular, in the present embodiment, the input shaft 23 of the stepless speed change mechanism 22 is integrally formed with the crankshaft 15 in advance, and the shifting mechanism 22 also directly uses the crankshaft 15 as its input shaft 23.

A gear shifting mechanism 30 is housed in the gear transmission 21, and the gear shifting mechanism 30 has a plurality of gear shifting shafts 31a to 31e. In this example, the first gear shifting shaft 31a as the power input of the gear shifting mechanism 30 is integrated with the output shaft 24 of the stepless shifting mechanism 22, and is also equivalent to the shaft that uses the output shaft 24 of the stepless shifting mechanism 22 as the power input. . At least one transmission gear is disposed on each of the gear shifting shafts 31a to 31e, and is in a corresponding meshing state. The last gear shifting shaft 31e is coupled to a wheel 42 for synchronous rotation (specifically, the wheel axle 421), typically a rear wheel.

A clutch 44 is disposed between the stepless shifting mechanism 22 and the gear shifting mechanism 30 such that the two shifting mechanisms selectively couple and transmit power.

An elongated arm 41 has a first end 411 and a second end 412. The first end 411 is embedded with a bearing 53 and the second end 412 is coupled to the wheel 42 (specifically, the wheel axle 421). The arm 41 is pivotally mounted to the stepless gearbox 20 by bearings at its first end 411. A shock absorber 43 is also coupled to the second end 412 of the arm 41.

On the other hand, the gearbox 21 includes a pivoting portion 211. The pivoting portion 211 is also embedded with a bearing 54. The gearbox 21 is pivotally mounted to the stepless gearbox 20 by a bearing 54 of its pivoting portion 211. In this example, the arm 41, the gearbox 21 and the wheel 42 as a whole are similarly pivotably held by the U-shaped transmission 20 in a U-shaped configuration, and the two bearings 53, 54 are disposed coaxially.

Therefore, the gear transmission 21 (and the wheel 42) and the stepless transmission 20 (which have been connected to the crankcase 14, the cylinder block 13, and the cylinder head 12 as the same unit) are relatively rotatable. The pivot axis X of the gearbox 21 is parallel to the centerline C of the crankshaft 15 and the output shaft 24 of the stepless shifting mechanism 22. In the present embodiment, the gear transmission 21 and the arm 41 are swung with the first gear shifting shaft 31a as a center of rotation.

In the assembly considerations of the relevant components (such as the crankshaft 15, the stepless shifting mechanism 22, and the gear shifting mechanism 30), the crankcase 14, the stepless gearbox 20, and the gearbox 21 are all designed in combination of a plurality of components.

After the assembly is completed, the cylinder block 13 is suspended from the frame 40, as shown in Fig. 2 at the suspension point P1. The crankcase is also suspended from the frame 40, as shown in Fig. 2, which is different from the suspension points P2, P3 of the suspension point P1.

As can be seen from the above, the present invention changes the design of the conventional stepless gearbox and the gearbox into a relatively rotatable body, which not only reduces the weight of the rocker during the vehicle trip (only the gearbox is rocking, the cylinder head) The cylinder block, the crankcase and the stepless gearbox are fixed by the same unit and are fixed by hanging on the frame. The swing is also reduced, which helps to improve the stability and ride of the whole vehicle. The convenience of the passenger control does not require a large swing space, which greatly enhances the flexibility of the space configuration. In addition, it also has the advantage of reducing damage to the components of the device due to rocking.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

90. . . locomotive

11. . . cylinder head

12. . . Cylinder head

13. . . Cylinder block

14. . . Crankcase

15. . . Crankshaft

16. . . Piston connecting rod set

20. . . Stepless gearbox

twenty one. . . Gear transmission

211. . . Pivot

twenty two. . . Stepless speed change mechanism

twenty three. . . Input shaft

twenty four. . . Output shaft

25. . . Belt

30. . . Gear shifting mechanism

31a, 31b, 31c, 31d, 31e. . . Gear shifting shaft

40. . . Frame

41. . . Arm

411. . . First end

412. . . Second end

42. . . wheel

421. . . Wheel axle

43. . . Shock Absorbers

44. . . clutch

51,52,53,54. . . Bearing

C. . . Center line

P1, P2, P3. . . Suspension point

X. . . Pivot axis

Figure 1 is a side view of a conventional locomotive.

2 is a side view showing the construction of a vehicle transmission according to a preferred embodiment of the present invention.

3 is a cross-sectional view showing the structure of a vehicle transmission device in accordance with a preferred embodiment of the present invention.

11. . . cylinder head

12. . . Cylinder head

13. . . Cylinder block

14. . . Crankcase

15. . . Crankshaft

16. . . Piston connecting rod set

20. . . Stepless gearbox

twenty one. . . Gear transmission

211. . . Pivot

twenty two. . . Stepless speed change mechanism

twenty three. . . Input shaft

twenty four. . . Output shaft

25. . . Belt

30. . . Gear shifting mechanism

41. . . Arm

31a, 31b, 31c, 31d, 31e. . . Gear shifting shaft

411. . . First end

412. . . Second end

42. . . wheel

421. . . Wheel axle

44. . . clutch

51,52,53,54. . . Bearing

C. . . Center line

X. . . Pivot axis

Claims (7)

A vehicle transmission structure is mounted on a frame, comprising: a cylinder block fixed to the frame; a crankcase fixed to the cylinder block and suspended from the frame, and being freely pivotable a crankshaft; a stepless gearbox, assembled and fixed to the crankcase, and having a stepless shifting mechanism, the stepless shifting mechanism comprising an input shaft coupled to transmit rotational power and an output shaft, the input shaft Coupling to the crankshaft; and a gearbox having a gear shifting mechanism coupled to the output shaft of the stepless shifting mechanism; wherein the gearbox is pivotally disposed on the stepless gearbox to define a pivot The axis of rotation is parallel to the output shaft, the same centerline, and the gearbox is swung relative to the cylinder block, the crankcase, and the stepless gearbox according to the pivot axis. The vehicle transmission structure of claim 1, further comprising a wheel, a shock absorber and an arm coupled to the gear shifting mechanism, the arm including a first end and a second The first end is pivotally disposed on the stepless gearbox, and the second end is coupled to the wheel and the shock absorber. The vehicle transmission structure of claim 2, wherein the first end is pivotally mounted to the stepless transmission through a bearing. The vehicle transmission structure of claim 1, wherein the gear transmission includes a pivoting portion that transmits through a shaft It is pivoted to the stepless gearbox. The vehicle transmission configuration of claim 1, wherein the gear shifting mechanism comprises a parallel plurality of gear shifting shafts. The vehicle transmission structure of claim 1, further comprising a clutch system disposed between the stepless shifting mechanism and the gear shifting mechanism. The vehicle transmission structure according to claim 1, wherein the stepless speed change mechanism is a belt type stepless speed change mechanism.