JPH0650683Y2 - Gear shift operation device for continuously variable vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to a gear shift operating device for a continuously variable traveling vehicle that travels by driving wheels by a traveling mission equipped with a friction continuously variable transmission.

(B) Conventional technology The input disc and the output disc are frictionally engaged with the transmission surface of the planetary cone so as to face each other, and the transmission ring is frictionally engaged with the conical surface of the planetary cone, so that the transmission ring has the conical surface of the planetary cone. The friction continuously variable transmission with a structure in which the rotational speed on the output disc side can be changed steplessly by moving the frictional engagement point with the conical surface by moving it to any position between the top and the skirt of the It has a characteristic that it is possible to perform a wide range of speed change from a low speed range including (neutral state) to a high speed range of 1,000 rpm, for example, and a self-lock function works if the friction continuously variable transmission stops. Therefore,
If a vehicle traveling mission is configured using this friction continuously variable transmission, the traveling speed of the vehicle can be continuously varied over a wide range, and when the vehicle is stopped, the body can be braked and fixed using the self-lock function of the friction continuously variable transmission. For this reason, it is convenient to construct a traveling mission of a vehicle by incorporating a friction continuously variable transmission.

And in the vehicle that uses this traveling mission,
If the drive source stops when the speed change ring of the friction continuously variable transmission is in the high speed position, the self-lock function of the friction continuously variable transmission locks the machine body in that state, but at the time of restarting Since it is dangerous to start suddenly, in order to prevent such a situation, when the drive source stops, the transmission ring automatically returns to the neutral position (no output position) and the self-lock function Is generally provided with a neutral return means for activating.

(C) Problems to be Solved by the Invention By the way, the neutral return means described above has a return spring interposed in the shift system for moving the transmission ring of the continuously variable transmission,
It is common to configure the transmission ring to automatically return to the neutral position by the spring force of the spring, but in this structure, if the spring force of the return spring is increased, the transmission ring is returned to the neutral position. The speed at which the vehicle returns quickly becomes faster, and the aircraft brakes more quickly after returning to the neutral state, resulting in a shorter braking distance. As a result, the operating force of the shift system becomes large and it becomes difficult to perform the gear shifting operation.In the end, it is necessary to set the spring force in consideration of the ease of operation, so the braking distance becomes long. There was a problem.

In view of this, the present invention reduces the braking distance until the self-lock function works by automatically returning the speed change ring to the neutral position while reducing the operating force for shifting the speed change ring of the friction continuously variable transmission in the speed increasing direction. The object of the present invention is to provide a shift operating device for a continuously variable traveling vehicle which is improved so as to be shortened.

(D) Means for Solving the Problems In order to achieve the above object, a gear shift operating device according to the present invention is a gear shift ring of a friction continuously variable transmission incorporated in a traveling mission for transmitting power from a drive source to traveling wheels. A speed change operation device for a continuously variable traveling vehicle, comprising a spring for automatically returning the speed change ring to a neutral position when the speed change operation system is released and when the drive source is stopped. In the above-mentioned shift operation system, a servo motor for assisting the return of the speed change ring, which starts operation when the drive source is stopped, stops at the position where the speed change ring returns to the neutral state, and returns to the original position by restarting the drive source. It has been incorporated.

(E) Operation and effect of the invention In the continuously variable traveling vehicle in which the device of the present invention having the above-described configuration is implemented, the operation can be performed by operating the speed change operation tool of the speed change operation system while the drive source is operating. The speed change ring of the friction continuously variable transmission is moved in the speed increasing direction according to the amount, and the speed corresponding to the amount of movement is set steplessly, the traveling wheels are driven, and the machine body travels.

Then, if the hand is released from the speed change operation tool while the machine is traveling, the speed change ring of the friction continuously variable transmission is automatically returned to the neutral position by the spring force of the spring incorporated in the speed change operation system and the machine is changed. It stops, in other words, the so-called deadman accelerator type airframe stops, and in this case, the drive source does not stop and the friction continuously variable transmission is in the operating state, so the movement resistance of the transmission ring is small. The spring force causes the spring to automatically return to the neutral position.

Next, when the drive source is stopped (including the case where the stop operation is intentionally performed), the servomotor is started by stopping the drive source, and the output of the servomotor is added to the restoring force of the spring. As a result, the synergistic force of both forces causes the transmission ring to automatically return to the Neutral position, and the servo motor stops at that position.

Therefore, even though the friction continuously variable transmission is stopped due to the stop of the drive source and the movement resistance of the speed change ring is in a large state, the speed change ring is automatically and quickly returned to the neutral position, and the neutral state is achieved. After that, the self-locking function of the friction continuously variable transmission will be maintained, so compared to the conventional structure that relied solely on the spring return force, the transmission ring will return to the neutral position. The time until the self-lock function works is significantly shortened, the braking distance of the aircraft is shortened, and safety is improved.

Then, the servo motor is temporarily stopped and maintained at the position where the speed change ring is returned to the neutral state, and does not return to the original position unless the drive source is restarted.Therefore, when restarting the aircraft, the speed change operation is performed first. It is possible to prevent the sudden start of the machine body caused by starting the drive source after shifting the system to the high speed state, and further improve the safety.

(F) Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

The embodiment shows the case where the continuously variable traveling vehicle is a moving X-ray vehicle, and this moving X-ray vehicle is located below the vehicle body (1) as shown in FIGS. 4 and 5. The traveling wheels (2) and (2) are arranged on both sides of the vehicle body, and the caster wheels (3) and (3) are arranged on both sides of the lower rear portion of the vehicle body (1). Necessary devices such as a battery (not shown in the figure) are provided, and a driving section (4) is provided at the rear part of the vehicle body to construct the traveling wheels (2).
(2) is configured to be driven and rotated by a traveling mission (6) having an electric motor as a drive source (5).

A friction continuously variable transmission (RC) is incorporated in the traveling mission (6).

As shown in the skeleton diagram in FIG. 1, the friction variable continuously variable machine (RC) is incorporated in the input part of the entire traveling mission (6), and its input shaft (7) is output from the drive source (5). The output shaft (8) is slidably fitted to the output shaft (8) side, and the clutch gear (9) transmits power to the differential mechanism (10) so that the power can be intermittently connected. Differential mechanism (1
Left and right output shafts (11) (1)
1) is driven, and the traveling wheels (2) and (2) are driven from the respective output shafts (11) and (11) via the final reduction mechanism (12) and (12).
Power is transmitted to each of them to drive them differentially.

In the friction continuously variable transmission (RC) itself, the input disk on the input shaft (7) side and the output disk on the output shaft (8) side are opposed to each other on the transmission surface of the planet cone group (13) arranged in the planet. In addition to frictionally engaging, the speed change ring (14) is frictionally engaged with the conical surface of the planetary cone group (13), and the speed change ring (14)
The shift speed of the power taken out to the output shaft side is infinite by moving the to the arbitrary position between the top and the skirt of the conical surface of the planetary cone by changing the frictional engagement point with the conical surface Can be changed to.

The shifter is composed of a holder that holds the shift ring and a shift shaft (15) that supports the shift ring and moves in the axial direction, and the shift shaft (15) connects the shift ring and the case wall of the traveling mission. It is provided with a spring (16) interposed between the neutral position (non-output position) so that it is elastically biased to return.

Further, the shifter of the clutch gear (9) is connected to a clutch lever (not shown) of the operating unit (4) by an operation line so that the clutch lever can be continuously operated, and the friction continuously variable transmission ( A brake (17) is provided on the side opposite to the output shaft (8) of the RC), and this is a dead man brake lever (1) of the driving section (4) by the operation rope (18).
It is connected to 9) so that the driving section (4) can perform braking and braking release operations.

1 and 2 and 3, the shift shaft (15)
A speed change hook (20) is axially attached to one end of the, and a torsion spring (21) interposed in the axial attachment portion is provided to return to a normal position by elastically biasing. Further, a gear shift lever (24) pivotally mounted (23) to an appropriate fixing member (22) is installed correspondingly in the vicinity of the gear shift hook (20). The (24a) is engaged with the engaging recess of the speed change hook (20), and the return spring (25) is interposed in the shaft mount (23).

Then, one extending arm (24b) of the speed change lever (24)
A pin (26) is planted in the pin, one end of a return spring (27) is locked to the pin, and the other end of the return spring (27) is an operating arm of the servo motor (28) for automatic return. (2
9) is locked. The servomotor (28) is attached to a support base (30) fixed to an arbitrary fixing member.

On the other hand, the inner end of the operation rope (31) is locked to the other extension arm (24c) of the speed change lever (24), and the operation rope (31)
The other end of the shaft is extended toward the driving part (4), and the shaft (32)
It is connected to one arm of a bell crank (33) which is swingably supported by the arm (see Fig. 6).

In FIG. 6 and FIG. 7, a pin (34) is horizontally mounted on the other arm of the bell crank (33).
The forward holes of the forward speed change arm (35) and the reverse speed change arm (36) are locked in the long holes (37) and (38) with play. The long holes (37) (38) have different lengths so that they do not interfere with each other's movement.

Then, the forward speed change arm (35) and the reverse speed change arm (36)
The other end of each is connected in a predetermined manner to a speed change blip (39) erected on the driving section (4) so as to be rotatable in the front-rear direction.

This connecting structure will be described in more detail. The speed change grip (39) is rotatably supported in the front-rear direction by a support shaft laterally supported by the frame body of the driving section (4), and one shaft end portion thereof is supported. The mounting part having a slightly smaller diameter is continuously connected to the.

Further, a backward bracket (40) and a forward bracket (41) having a fan-shaped side view are fixedly mounted on the mounting portion with a predetermined angular phase difference in the rotational direction of the speed change blip (39) to advance. The end of the forward speed change arm (35) is rotatably attached to a predetermined position of the bracket (41) and the end of the reverse speed change arm (36) is rotatable on the reverse bracket (40). Is connected to the shaft.

Further, a torque spring (42) is fitted in the mounting portion, and both spring end portions thereof are two parallel spring fixing pins fixed to the advance bracket (41) and the fixing frame (43). (44)
(45) is provided so as to be clamped so as to be sandwiched, and when the speed change grip (39) is released, the speed change blip (39) is returned to the neutral position by the restoring force of the torque spring (42). In addition, both spring ends of the torque spring (42) are connected to the forward movement changeover switch (46) and the backward movement changeover switch (47) at the initial stage of rotating the gear shift grip (39) forward or backward. If both switches (46) and (47) are actuated selectively by the contact, and the shift grip (39) returns to the neutral position, both switches (4
6) Both (47) are inactivated.

Both switches (46) (47) are control circuits (48) for the electric motor that control forward / reverse switching / stop control of the electric motor (5).
If the forward changeover switch (46) of the two switches (46) (47) that is normally kept inactive is connected, the electric motor (5) will rotate normally, and When the reverse switch (47) is connected, the electric motor (5) rotates in the reverse direction.

Further, the control circuit (48) is connected to a servo motor control circuit (49) which is activated when the electric motor (5) is stopped unexpectedly or intentionally stopped.

When the servo motor control circuit (49) enters the operating state, the servo motor (28) starts operating and its operating arm (2
9) operates a predetermined stroke in the direction of the arrow in Fig. 2, and its movement is transmitted through the return spring (27) to the speed change lever (24).
Is transmitted to the shift shaft (15), that is, the shift ring (14) that moves coaxially, is automatically returned to the neutral position (no output position) by moving the shift hook (20) engaged with the shift hook (20) in the deceleration direction. The servo motor (28) is once stopped at the position, and when the electric motor (5) is restarted, the servo motor (28) is returned to its original pre-operation state.

Therefore, when the speed change ring (14) is in the acceleration position,
When the electric motor (5), which is the drive source, stops, the friction continuously variable transmission (RC) also stops, and the shift shaft (15) is moved by the spring (16) even though the movement resistance of the transmission ring (14) increases. ) Is assisted by the servo motor (28), a quick and reliable automatic recovery is performed, and the self-locking action of the friction continuously variable transmission works to fix the machine body by braking. Since the servo motor (28) is maintained in the operating position unless 5) is restarted, it is possible to reliably prevent an erroneous operation such as a speed-up operation before the vehicle starts.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing the main structure of the device of the present invention, and FIG.
FIG. 3 is an enlarged plan view of a servo motor portion of the device of the present invention, FIG. 3 is a side view of the same, FIG. 4 is a schematic plan view of a continuously variable traveling vehicle in which the device of the present invention is implemented, and FIG. FIG. 6 and FIG. 6 are side sectional views of the essential parts of the speed change grip portion, and FIG. 7 is a plan sectional view of the essential parts of the speed change grip. (2) ... traveling wheel, (5) ... driving source (6) ... traveling mission, (14) ... transmission ring (16) ... spring, (28) ... servomotor (39) ... shift operation tool (RC) ... friction Continuously variable transmission

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. When a speed change operation tool of the speed change operation system is released to a speed change operation system that moves a speed change ring of a friction continuously variable transmission incorporated in a travel mission that transmits power from a drive source to travel wheels. In a speed change operation device for a continuously variable traveling vehicle, which is configured by interposing a spring that automatically returns the speed change ring to a neutral position when the power source stops,
Incorporating a speed change ring return assist servomotor that starts operation when the drive source is stopped, stops at the position where the speed change ring returns to the neutral state, and returns to the original position by restarting the drive source in the speed change operation system. A gear shifting operation device for a continuously variable traveling vehicle characterized by being provided.