JP3286342B2 - Emergency braking mechanism for traveling vehicles - Google Patents

Abstract

PURPOSE:To improve such drawbacks in a conventional emergency brake mechanism wherein an amount of rotational movement is large, a control spring must be expanded to an extent more than required, and a motor actuator is subjected to an excessively large load. CONSTITUTION:The braking and releasing operation of a brake cam 29 is carried out by placing a normal braking arm 7 in its turning motion by the expansion and contraction of a motor actuator 2 and by operating a brake wire 8 connected to an emergency brake arm 5 which makes its turning motion together with the normal brake arm 7 after being engaged therewith. A brake lock alleviating mechanism S is interposed in the intermediate space between the motor actuator 2 and the normal brake arm 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling vehicle brake mechanism provided with an emergency stop mechanism which can be started and stopped by an electric signal and can be stopped in an emergency.

[0002]

2. Description of the Related Art Conventionally, as in the prior application of Japanese Patent Application No. 4-61752, a disc spring for mitigating an impact generated at the time of joining a friction plate is interposed in a brake mechanism, and a brake lock relaxation mechanism is provided. The technology has been filed by the same applicant. Further, in the above-mentioned prior application, the emergency braking spring is mounted on the emergency braking arm, and the brake arm is rotated via the brake wire.
In the prior application, the maximum stroke position in the extension direction of the motor actuator is substituted for the detection of the brake release position without installing the brake position detection switch. Further, in the prior application, the time from when the brake is released to when the vehicle starts is greatly affected by the change in the elongation of the brake wire. Further, in the prior application, a dedicated microswitch for detecting the inspection and replacement time of the brake wire was provided.

[0003]

The present invention provides the following:
There is a problem to be solved. Placed to the invention of claim 1
During automatic braking of a traveling vehicle downhill,
The challenge is to get a smooth braking feeling
Is what you do . It is another object of the present invention to prevent a strong braking force from being applied at a stretch as the tire is locked, and to obtain a good braking feeling. Ma
Another object is to extend the life of the brake wire 8.
Things . Also, when the brake wire 8 is cut
Also, ensure that the emergency brake is constructed rather than all action, safety
It is an object to improve the quality . Also,
Of the actuator 2 to the brake cam 29
It is configured to be able to communicate . Also brake
A component of braking force that is too weak and unnecessary, causing a delay in operation
Is removed in advance by the impact relaxation spring 13 to provide a highly accurate control.
It is an object to perform dynamic control .

[0004] Oite to a second aspect of the invention, at the time of emergency braking
The purpose is to reduce the impact of the link.
You . Oite to the invention of claim 3, constant brake clearance amount
The challenge is to keep It is another object of the present invention to perform control with a small change in the traveling speed even for a sudden change in the traveling path, particularly a convex change from an uphill to a downhill.
Things . Also, there is no need to prepare a separate bracket for mounting the brake position detection switch 10.
And the subject .

[0005] Oite to the invention of claim 4, by detecting whether the engagement state or disengaged state of the normal brake arm 7 and the emergency brake arms 5, to detect whether or not the emergency braking state It was an issue . Another object is to use the emergency braking arm 5 or the normal braking arm 7 as a bracket without separately preparing a bracket for mounting the emergency braking arm detection switch 9. Oite to the invention of claim 5, the cutting timing of the brake wire 8, and is obtained by an object to detect the adjustment, inspection and replacement timing.

[0006]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. In the first aspect, the braking and release of the brake is performed during normal stop / start by rotating the normal brake arm 7 by the expansion and contraction of the motor actuator 2, and the emergency brake arm 5 engaged with the normal brake arm 7 is integrated. The brake wire 8 connected to the emergency braking arm 5 is operated.
Performs a braking and the release of the operation of 9, at the time of emergency braking, to release the engagement of the normal braking arm 7 and the emergency braking arm 5, emergency
In order for the brake arm 5 to be able to rotate freely,
The pulling force of the gear 8 becomes 0, and the
The emergency braking spring 1 causes the brake arm 11 to shake.
Is turned to the braking side of the brake cam 29 to perform the braking operation.
In the configuration, a brake lock relaxation mechanism S constituted by an impact relaxation spring 13 is interposed between the motor actuator 2 and the normal braking arm 7.

[0007] According to a second aspect, the traveling according to the first aspect is provided.
In an emergency braking mechanism for a vehicle, a damper spring 20 for emergency braking is mounted on an emergency braking arm 5.

[0008] According to a third aspect, the traveling according to the first aspect is provided.
In the emergency braking mechanism of the vehicle, the brake arm 11 is detected in order to detect the release position of the brake cam 29 at the position of the brake arm 11 coupled to the brake cam 29.
Is provided with a brake position detection switch 10.

According to a fourth aspect of the present invention, the vehicle according to the first aspect is driven.
In the emergency braking mechanism of the vehicle, by detecting whether the normal braking arm 7 and the emergency braking arm 5 are engaged or disengaged on the emergency braking arm 5 or the normal braking arm 7, the emergency braking state is determined. An emergency brake arm detection switch 9 for detecting whether or not there is a switch is provided.

According to a fifth aspect, the traveling vehicle according to the third aspect.
In the emergency braking mechanism of the vehicle, a signal from the brake position detection switch 10 and a detection signal for detecting that the motor actuator 2 is at the extension side maximum position are used to detect the breakage of the brake wire 8 and the timing of adjustment / replacement. It is composed.

[0011]

Next, an embodiment will be described. FIG. 1 is an overall side view of a traveling vehicle, FIG. 2 is a side view of a braking mechanism of the traveling vehicle of the present invention, and FIG. 3 is a braking mechanism of the traveling vehicle. FIG. 4 is a side view of a brake mechanism attached to a side surface of the transmission case M, and FIG. 5 is a rear cross-sectional view of the brake mechanism.

In this embodiment shown in FIG. 1, a golf cart which is radio-controlled and can be boarded is shown as a traveling vehicle. In this configuration, the operator can operate the start / stop switch of the wireless control box even when the operator is in the traveling vehicle. The start / stop can also be performed by operating the start / stop pedal provided on the seat portion. Further, it is a matter of course that an unmanned start can be stopped by operating the switch of the radio control box at a position away from the traveling vehicle.

FIG. 1 discloses a configuration in which a shift lever 27 is disposed below a seat. The shift lever 27 operates forward and backward by sliding a shift gear in the transmission case M. This operation is usually rarely performed, and is performed only in a special case such as when the running vehicle is taken out of the garage or stored in the garage. The operation of the transmission lever 27 is transmitted to the transmission gear in the transmission case M by the transmission wire 22, and the outer receiver 35 of the transmission wire 22 is connected to a wire receiver provided on the brake case C on the side of the transmission case M. It is fixed to a bracket 21. The outer bracket 36 for the brake wire 8 is also provided on the wire receiving bracket 21.

The transmission case M is composed of left and right split transmissions, and axles 31 project left and right from the transmission case M. Mission case M
A spacer brake case 38 is interposed on the left side surface of the vehicle, and a brake case C is fixed to the outside thereof. The above-mentioned wire receiving bracket 21 is fixed to a flat portion on the upper surface of the brake case C.

Next, the details of the brake mechanism of the present invention will be described with reference to FIGS. A braking friction plate 37 is interposed at a portion where the brake shaft 39 projects into the spacer brake case 38. The brake cam shaft 25 is rotated by the operation of the brake wire 8, and the brake cam 29 at the inner end of the brake cam shaft 25 is engaged with the brake actuator 26. It turns.

A tear drop hole is formed in the brake actuator 26, and a tear drop hole is also formed inside the brake case C at an opposing position. A cam ball 28 is disposed between the teardrop holes. When the brake actuator 26 is rotated by the brake cam 29, the positions of both teardrop holes are shifted, the cam ball 28 is pushed out, and the brake actuator 26 is moved to the braking friction plate 3.
7 is pushed in the direction of pressing.

At the time of the first pressing by the brake actuator 26, a brake lock relaxation mechanism S is provided.
Since the impact relaxation spring 13 is slightly bent and a biasing force acts,
Normally, the brake arm 7 is pushed by this urging force,
Through the key wire 8 and the brake arm 11, the brake
As a result, the damper 29 is turned, and a weak braking force is applied.
By enabling this state, it becomes possible to control the traveling speed of the unmanned traveling vehicle. Next, a brake mechanism for an unmanned vehicle will be described with reference to FIGS.

Although a start / stop pedal is provided, the turning operation of the pedal is also changed to an electric signal, and the motor actuator 2 and the emergency braking solenoid 4 are operated. Actually, only the two forces of the motor actuator 2 and the emergency braking spring 1 actually operate the brake wire 8. Then, in the case of a normal start / stop signal, the operation is to extend / contract the motor actuator 2. The motor actuator 2 expands and contracts by rotation of the motor, and normally rotates the brake arm 7 right and left at a constant speed.

Therefore, the rotation speed of the normal braking arm 7 is the same when starting and stopping, and the starting and stopping of the running vehicle is performed slowly. The motor actuator 2 is pivotally supported at its left end on a bracket 3 by a pivot shaft 40, and can normally expand and contract to rotate the braking arm 7. An engaging pin arm 16 is pivotally supported by a pivot shaft 17 at the tip of the normal braking arm 7, and the engaging pin 6 projects upward from the engaging pin arm 16. The engaging pin 6 is arranged so as to be able to engage and disengage with the engaging projection 15 of the emergency braking arm 5.

Since the engagement pin 6 is engaged with the engagement projection 15 of the emergency braking arm 5, the expansion and contraction force of the motor actuator 2 is reduced by the emergency braking arm 7 from the normal braking arm 7 via the engagement pin 6. 5 is transmitted. When the emergency braking arm 5 rotates about the pivot 19, the expansion and contraction force of the motor actuator 2 is transmitted to the brake wire 8. By the operation of the emergency braking solenoid 4,
The engagement pin arm 16 rotates, and the engagement state between the engagement pin 6 and the emergency braking arm 5 is released. As a result, the emergency braking arm 5 is freely rotatable, and is rotated around the pivot shaft 19 at a stretch by the contraction force of the emergency braking spring 1 to pull the brake arm 11 to apply emergency braking.

In the present invention, the brake lock mitigation mechanism S comprises the push rod 18, the spring holder 12, the impact mitigation spring 13, the spring spacer, and the spring pin 43, and is provided between the motor actuator 2 and the normal brake arm 7. . The motor actuator 2 is connected by bolts, and the brake arm 7 is usually connected by pins. The spring holder 12 is formed in a pipe shape and has a long hole penetrated. The push rod 18 slides in the inside of the pipe, and the range of the movement of the push rod 18 is restricted by the spring pin 43 and the elongated hole.

When the brake is released, the motor actuator 2 first expands, but the impact relaxation spring 13 is contracted, and the brake arm 7 normally does not move until the guide of the impact relaxation spring 13 contacts the motor actuator 2 side. However, during this time, the brake braking force is normally a force balanced with the urging force of the impact relaxation spring 13 by the contraction of the impact relaxation spring 13.
When the brake arm 7 is pushed, the brake wire 8 and the brake
The brake cam 29 is rotated via the arm 11 and
Braking force acts. Further, the motor actuator 2
Is extended and the brake cam 29 is released when the normal braking arm 7 starts to move, enabling smooth start. In the brake braking with the motor actuator 2 contracted, the reverse braking performance described above is obtained. That is, the initial braking force is
Only deflected minute of the shock-absorbing spring 13, in normal braking arm 7 Ri by the biasing force of the shock-absorbing spring 13 is pressed, Burekiwa
Through the ear 8 and the brake arm 11, the brake cam 2
As the motor actuator 2 contracts, the bending of the shock absorbing spring 13 decreases and the braking force increases as the motor actuator 2 contracts. From the position where the spring pin 43 contacts the distal end of the spring holder 12, all components of the emergency braking spring 1 act as a braking force.

The emergency braking solenoid 4 for performing the emergency stop is supported by a solenoid bracket 30 projecting from the normal braking arm 7. The solenoid bracket 30 also serves as a push operation plate 30 of the emergency braking arm detection switch 9 fixed to the emergency braking arm 5.

The brake arm 11 connected to the brake cam 29 is composed of two arms and a boss. The emergency brake spring 1 and the brake wire 8 for releasing the braking force are mounted on each arm. Motor actuator 2
Causes the emergency braking arm 7 to rotate, and the emergency braking arm 5 is rotated integrally therewith, and the brake wire 8 is connected to the emergency braking arm 5. When the motor actuator 2 extends, a load acts on the brake wire 8, and when the load becomes larger than the emergency braking spring 1, the brake cam 29 is released. During emergency braking, the emergency brake arm 5 can rotate freely.
Becomes zero, and the emergency brake spring 1 rotates the brake arm 11 toward the braking side.

A switch operation pin 14 is welded to the brake arm 11, and the switch operation pin 14 turns on and off the brake position detection switch 10 fixed to the wire receiving bracket 21. When the brake position detection switch 10 is turned on, the rotation of the motor actuator 2 is stopped. Therefore, the motor actuator 2 is stopped at a position where braking can be performed as soon as possible. The brake position detection switch 1
Since 0 is fixed to the wire receiving bracket 21,
This made it easier to adjust the brake release position and braking position.

In preparation for the vehicle to start, the motor actuator 2 is contracted, and the engaging pin 6, which is normally pivotally supported at the tip of the braking arm 7, does not hit the engaging projection of the emergency braking arm 5. Ensure a gap between them. If the gap between the engagement pin 6 and the emergency braking arm 5 is large, the starting time is delayed, and if too small, the emergency braking solenoid 4 returns, so that the engagement pin 6 reaches the position where it engages with the engagement projection 15. The return gap is eliminated, and the normal braking arm 7 and the emergency braking arm 5 cannot be rotated integrally . At the time of manufacture, this gap is adjusted to a gap having a small limit. However, when the brake wire 8 is extended, the gap becomes large, and the start delay is increased. If the contraction of the motor actuator 2 is stopped at a position where the initially set limit gap can be ensured even if the brake wire 8 extends, the starting time can be kept optimal.
The stop position of the motor actuator 2 is detected by the emergency braking arm detection switch 9.

In the conventional structure, the motor actuator 2
Because the telescopic stroke was used at almost the maximum value,
There was no room for automatic adjustment. With this configuration, there is room for the expansion and contraction stroke of the motor actuator 2.

If the brake position detection switch 10 is not turned on even though the stroke of the motor actuator 2 is at the maximum position, it is considered that the brake wire 8 has been cut or the adjustment is poor. It is displayed on the alarm device. In the conventional brake structure, since the stroke of the motor actuator 2 was used to the maximum, the motor actuator 2 was always used.
The signal of the extension limit of the wire cannot be given a special meaning as a detection signal of the wire inspection / replacement time. However, in the present invention, the emergency brake arm detection switch 9 and the brake position detection switch 10 are used. Is provided, it is possible to generate an alarm signal based on the maximum position of the brake position detection switch 10 and the motor actuator 2.

[0029]

As described above, the present invention has the following advantages. With this configuration, a smooth braking feeling can be obtained even on a steep slope due to expansion and contraction of the brake lock relaxation mechanism S in automatic braking on a downhill. In addition, since the brake lock mitigation mechanism S is interposed, a strong braking force is not applied at a stretch as the tires are locked.
Good braking feeling can be obtained. In addition, since the brake lock mitigation mechanism S constituted by the impact mitigation spring 13 is interposed between the motor actuator 2 and the normal braking arm 7, it is generated by the vibration of the vehicle body when the traveling vehicle travels, and the brake operation delay is caused. The unnecessary braking force component that is too weak, which is a cause, is removed in advance by the impact relaxation spring 13 to enable highly accurate braking control. When the emergency braking is activated, the emergency braking spring 1
When the load is applied only to the brake arm 11, the brake
The gear 8 is released when the emergency braking arm 5 is disengaged .
The emergency braking spring 1 is only pulled in the state.
Strong tensile load based on the shocking shrinkage of
This is to extend the life of the brake wire 8. Also,
Even if the brake wire 8 is cut,
The safety function improves safety.

By interposing the emergency braking arm 5 with the damper spring 20, the play of the brake wire 8 can be eliminated, and the operation of the motor actuator 2 can be controlled by the brake wire. 8 and brake arm 1
1 so that the structure can be reliably transmitted to the brake cam 29. Also, by installing the damper spring 20, it was possible to reduce the impact of the link portion during emergency braking.

Since the brake arm 11 is not affected by a change in length due to the elongation of the brake wire 8, the brake arm 11 is provided with the brake position detecting switch 10 so that the brake arm 11 can be braked. The amount of play is kept constant. Accordingly, the time from the release of the brake cam 29 to the braking can be fixed and set to the shortest time, so that a sudden change in the traveling path, particularly a convex change from an uphill to a downhill, can be achieved. Control with little change in running speed became possible.
You.

With this configuration, it is possible to reliably detect whether or not the vehicle is in the emergency braking state by detecting whether the normal braking arm 7 and the emergency braking arm 5 are engaged or disengaged. />. Further, the emergency braking arm 5 or the normal braking arm 7 can be used as a bracket without separately preparing a bracket for mounting the emergency braking arm detection switch 9.

According to the fifth aspect of the present invention, it is necessary to confirm the cutting, adjustment, inspection, and replacement timing of the brake wire 8 which is likely to be extended due to the application of an excessive tensile load.
Indeed, it could be detected.

[Brief description of the drawings]

FIG. 1 is an overall side view of a traveling vehicle.

FIG. 2 is a side view of a brake mechanism for a traveling vehicle according to the present invention.

FIG. 3 is a plan view of the brake mechanism of the traveling vehicle in a state where the brake is being braked by the emergency braking spring 1 and the motor actuator 2 has been completely reduced.

FIG. 4 is a side view of a brake mechanism attached to a side surface of the transmission case M;

FIG. 5 is a rear cross-sectional view of a brake mechanism.

[Explanation of symbols]

 M Transmission case 1 Emergency braking spring 2 Motor actuator 3 Bracket 4 Emergency braking solenoid 5 Emergency braking arm 6 Engagement pin 7 Normal braking arm 8 Brake wire 9 Emergency braking arm detection switch 10 Brake position detection switch 11 Brake arm 12 Spring holder 13 Impact mitigation Spring 14 Switch action pin

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI F16D 55/38 F16D 55/38 (56) References JP-A-5-263846 (JP, A) JP-A-4-364506 (JP) JP-A-51-27239 (JP, A) JP-A-2-114570 (JP, U) JP-A-49-94086 (JP, U) JP-A-49-94087 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) F16D 65/30 F16D 65/34 F16D 55/38 A63B 55/08 B60T 7/02 B60T 13/04 B60T 13/74

Claims (5)

(57) [Claims] 1. The braking and releasing of a brake is performed by a normal stop /
At the time of starting, the normal brake arm 7 is rotated by expansion and contraction of the motor actuator 2, the emergency brake arm 5 engaged with the normal brake arm 7 is integrally rotated, and the brake wire 8 connected to the emergency brake arm 5 is rotated. The brake wire 29 is operated to brake and release the brake cam 29. In the case of emergency braking, the normal braking arm 7 and the emergency braking arm 5 are disengaged, and the emergency braking arm 5 rotates freely. Yes
In order to become effective, the tensile force of the brake wire 8 becomes 0,
The emergency braking spring 1 attached to the brake arm 11
The brake arm 11 brakes the brake cam 29
The brake lock relief mechanism S constituted by an impact relief spring 13 is provided between the motor actuator 2 and the normal brake arm 7 in the configuration in which the brake operation is performed by being turned to the side.
An emergency braking mechanism for a traveling vehicle, wherein the emergency braking mechanism is interposed. 2. An emergency brake for a traveling vehicle according to claim 1.
An emergency braking mechanism for a traveling vehicle, wherein a damper spring 20 for emergency braking is mounted on the emergency braking arm 5. 3. An emergency brake for a traveling vehicle according to claim 1.
In the mechanism, the brake arm 11 is provided with a brake position detection switch 10 for detecting the release position of the brake cam 29 at the position of the brake arm 11 coupled to the brake cam 29. Emergency braking mechanism. 4. An emergency brake for a traveling vehicle according to claim 1.
The mechanism detects whether the emergency braking state is on or off by detecting whether the normal braking arm 7 and the emergency braking arm 5 are engaged or disengaged on the emergency braking arm 5 or the normal braking arm 7. An emergency braking mechanism for a traveling vehicle, comprising an emergency braking arm detection switch 9 for detecting. 5. An emergency brake for a traveling vehicle according to claim 3.
In the mechanism, it is configured to detect the disconnection of the brake wire 8 and the timing of adjustment / replacement by a signal of the brake position detection switch 10 and a detection signal for detecting that the motor actuator 2 is at the maximum position on the extension side. Characteristic emergency braking mechanism for traveling vehicles.