JP4549337B2 - Manual brake device tension adjustment mechanism - Google Patents

Description

  The present invention relates to a tension of a manual brake device that pivotally supports a brake lever on a base member and swings the brake lever to transmit a force to a braking portion via a cable to generate a braking force. It relates to an adjustment mechanism.

  Conventionally, as a tension adjusting mechanism of this type of manual brake device, for example, there is one disclosed in Patent Document 1. That is, this document discloses a technique in which a brake cable is wound around the base of a stepping brake lever, an adjusting nut mechanism is provided at the end of the brake lever, and the brake cable is pulled in for adjustment.

JP-A-5-319226

  However, in the tension adjusting mechanism of the conventional manual brake device, since the tension adjusting mechanism coincides with the axis of the brake cable, it is close to a nearby member, the tool is difficult to attach, and the tension is difficult to adjust. was there.

  The present invention has been made paying attention to such problems of the prior art, and an object thereof is to provide a tension adjusting mechanism of a manual brake device in which a tool can be easily attached and tension can be easily adjusted.

The gist of the present invention for achieving the above object lies in the following items.
[1] The brake lever (30) is pivotally supported on the base member (20), and the brake lever (30) is swung to transmit the force to the braking portion via the cable (C), thereby increasing the braking force. In the tension adjusting mechanism (50) of the manual brake device (10) to be generated,
The tension adjusting mechanism (50) is configured by connecting a pair of connecting members (51, 55) interposed between the cable (C) and the brake lever (30) with an adjuster shaft (52). 52) and any one of the connecting members (51, 55).
A manual brake device characterized in that a flexible member (53) for rotating the adjuster shaft (52) extends laterally from the axis of the cable (C), and a force applying member (54) is provided at the tip. 10) Tension adjusting mechanism (50).

[2] The brake lever (30) is pivotally supported on the base member (20), and the brake lever (30) is swung to transmit the force to the braking portion via the cable (C), thereby increasing the braking force. In the tension adjusting mechanism (50) of the manual brake device (10) to be generated,
The tension adjusting mechanism (50) includes a pair of connecting members (51, 55) of a clevis (51) and an equalizer (55) interposed between the cable (C) and the brake lever (30). And is adjusted by the amount of screwing between the adjuster shaft (52) and the equalizer (55),
A flexible member (53) for rotating the adjuster shaft (52) is positioned beside the clevis (51) projecting laterally from the axis of the cable (C), and is attached to the tip of the flexible member (53). A tension adjusting mechanism (50) of the manual brake device (10), characterized in that a pressing member (54) is provided.

Next, the operation will be described.
When the initial setting or the braking force is reduced, the tension of the cable (C) is adjusted by the tension adjusting mechanism (50). A force applying member that extends from the adjuster shaft (52) to the side of a clevis (51) that is one of a pair of connecting members (51, 55) by a flexible member (53) of a tension adjusting mechanism (50). When the adjusting nut (54) is turned with a tool, the adjuster shaft (52) connecting the pair of connecting members (51, 55) of the clevis (51) and the equalizer (55) is rotated.

  Since the screw shaft at the lower end of the adjuster shaft (52) is screwed into the connecting nut (57) pivotally attached to the equalizer (55) and rotated, the equalizer (55) is pulled up, and both ends of the equalizer (55) The cable (C) is pulled up through the connecting pins (56, 56) of the part to reduce the length. As a result, the same effect as that of shortening the cable (C) is produced, the initial braking position is raised, and the tension is adjusted. If the braking position is too high, it may be rotated in the reverse direction.

  According to the manual brake device of the present invention, since the tension adjusting force member is provided at the position protruding from the cable axis, the tool can be easily mounted, the tension adjustment workability is good, and the cable tension can be easily adjusted. Can be adjusted and maintained in an appropriate state.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 5 show an embodiment of the present invention.
The manual brake device 10 is suitable for an industrial vehicle such as a forklift. For example, a brake lever 30 is pivotally supported by a pivot 31 on a base member 20 installed near the driver's seat of the vehicle, and an arm portion 35 that extends upward from the pivot 31. And the pivot 31 constitute a toggle mechanism.

  A toggle output shaft 36 is provided at the tip of the arm portion 35, and cables C and C are connected to the toggle output shaft 36 via a clevis 51 and an equalizer 55 that constitute a tension adjusting mechanism 50. The front end side of is connected to a braking portion (not shown). The toggle output shaft 36 is inserted and connected to the connecting hole 51a of the clevis 51.

  Then, when the petal pad 37 at the tip of the brake lever 30 is stepped on and pushed down, a force is transmitted to the braking portion via the cable C to generate a braking force. Since the brake lever 30 and the cable C are connected via a toggle mechanism, the braking force by the brake lever 30 is amplified by the toggle mechanism to generate a strong braking force on the braking portion.

  Since the toggle mechanism generates a strong braking force and does not return even if there is a reaction force on the mechanism, a return spring 60 is provided to bias the brake lever 30 stopped at the braking position in the braking release direction. A lock mechanism 40 that holds the brake lever 30 to be returned by the spring 60 in the braking position is provided.

  An interposed member 38 is fixed to the brake lever 30 so as to surround the pivot 31 of the brake lever 30, and a return spring 60 is stretched between the end 39 of the interposed member 38 and the base member 20. In addition, a damper 65 is provided on the pivot 31 of the brake lever 30 so as to generate a viscous rotational resistance so as to suppress the return speed of the brake lever 30 to the release position when the brake is released.

  A square shaft 32 formed at the end of the pivot 31 is fitted in a square hole 66 of the damper 65 and is integrated with the pivot 31 of the brake lever 30. A rotation set screw 67 extended from the damper 65 is screwed into the screw hole 38 a of the interposition member 38 so that the damper 65 is interlocked with the brake lever 30.

  The locking mechanism 40 includes a locking plate 41 fixed to the brake lever 30 so as to be interlocked with the brake lever 30 and a release member 45 having a locking portion 46 with which the engaging portion 42 of the locking plate 41 is engaged and disengaged. It consists of The lock mechanism 40 is unlocked by setting the release member 45 to the release position. The rocking end of the locking plate 41 is formed in a claw shape and forms an engaging portion 42.

  The release member 45 is pivotally attached to the base member 20 by a support shaft 45a, and one end forms a locking portion 46 which is a pin with which the engaging portion 42 of the locking plate 41 is engaged and disengaged. The other end is a release end 47 to which a release cable 49 is connected, and is urged by a release spring 48 to escape when the engaging portion 42 of the locking plate 41 is engaged with and disengaged from the engaging portion 46. The release cable 49 is extended near the brake operator.

  In the tension adjustment mechanism 50 of the cable C, a pair of connecting members of the clevis 51 and the equalizer 55 are connected by an adjuster shaft 52, and the cables C and C are connected to both ends of the equalizer 55 via connecting pins 56 and 56. ing. The adjuster shaft 52 and the equalizer 55 have a lower end portion of the adjuster shaft 52 as a screw shaft, and the screw shaft is screwed to a connecting nut 57 pivotally attached to the equalizer 55. The upper end of the adjuster shaft 52 is inserted into the clevis 51 so as not to come off at the head 52a, and the flexible member 53 projects from the head 52a to the side of the clevis 51. An adjustment nut 54 is fixed to the tip of the member 53.

Next, the operation will be described.
When the petal pad 37 at the free end of the brake lever 30 pivotally supported by the base member 20 is stepped on with a foot, the brake lever 30 is pushed down and turned to change from the state shown in FIG. 4 to the state shown in FIG.

  In FIG. 4, when the arm portion 35 of the brake lever 30 is rotated, the toggle output shaft 36 of the toggle mechanism located before the pivot 31 of the brake lever 30 is raised, and the connection hole 51 a of the clevis 51 of the tension adjusting mechanism 50. Then, the clevis 51 is raised, and the cables C and C are pulled up by the adjuster shaft 52, the equalizer 55, and the connecting pins 56 and 56.

  In this way, the toggle mechanism operates by the rotation of the brake lever 30 to amplify the braking force, and when the toggle output shaft 36 of the toggle mechanism is at the top dead center of the toggle mechanism, the maximum amplified braking force is generated. . Since the brake lever 30 and the cable C are connected via a toggle mechanism, when the brake lever 30 is pushed down, the amplification factor of the braking force by the toggle mechanism increases accordingly, and a strong braking force is generated.

  Even if there is a strong braking reaction force at the dead point, the toggle mechanism stops at that position and does not return due to the braking reaction force. Therefore, the brake lever 30 stopped at the braking position can be moved in the braking release direction by the return spring 60 that biases in the release direction when returning, and the brake lever 30 is rotated against the biasing force of the return spring 60. The

  Then, the lock mechanism 40 holds the brake lever 30 in the braking position against the elastic force of the return spring 60 in the return direction. That is, when the brake lever 30 is stepped down, in the lock mechanism 40, the locking plate 41 rotates in conjunction with the brake lever 30, and the engaging member 42 of the locking plate 41 is provided on the base member 20. The brake lever 30 is held at the braking position by engaging with the locking portion 46 of 45, and the braking force is maintained.

  To release the brake from the braking state, when the release cable 49 is pulled, the release end 47 of the release member 45 is pulled, the release member 45 is rotated, and the release member 45 is in the release position. As a result, the engaging portion 42 of the locking plate 41 is disengaged from the engaging portion 46 of the release member 45 and unlocked, and the brake lever 30 is released to release the brake from the braking position. The release member 45 returns to the original position by the urging force of the release spring 48.

  When the brake is released, the brake lever 30 is returned to the original position by the urging force of the return spring 60. At this time, the return speed of the brake lever 30 to the release position is suppressed by the damper 65, and the brake lever 30 is silently returned to the brake release position.

  When the initial setting or the braking force is reduced, the tension of the cable C is adjusted by the tension adjusting mechanism 50. When the adjustment nut 54 extending from the adjuster shaft 52 and extending from the adjuster shaft 52 to the side of the clevis 51 which is one of the pair of connecting members by the flexible member 53 of the tension adjusting mechanism 50 is turned with a tool, a pair of the clevis 51 and the equalizer 55 is paired. The adjuster shaft 52 connecting the connecting members is rotated.

  Since the screw shaft at the lower end portion of the adjuster shaft 52 is screwed into a connecting nut 57 pivotally attached to the equalizer 55 and rotated, the equalizer 55 is pulled up and connected via connecting pins 56 and 56 at both ends of the equalizer 55. The cables C and C are pulled up to reduce the length. This produces the same effect as shortening the cables C and C, and the initial braking position is raised and the tension is adjusted. If the braking position is too high, it may be rotated in the reverse direction.

1 is an exploded perspective view showing a manual brake device according to an embodiment of the present invention. 1 is a perspective view showing a manual brake device according to an embodiment of the present invention. 1 is a front view of a manual brake device according to an embodiment of the present invention. 1 is a side view of a manual brake device according to an embodiment of the present invention. It is a side view which shows the braking state of the manual brake device which concerns on one embodiment of this invention.

Explanation of symbols

C ... Cable 10 ... Manual brake device 20 ... Base member 30 ... Brake lever 31 ... Pivot shaft 32 ... Square shaft 35 ... Arm part 36 ... Toggle output shaft 37 ... Petal pad 38 ... Interposition member 38a ... Screw hole 39 ... End 40 DESCRIPTION OF SYMBOLS ... Locking mechanism 41 ... Locking plate 42 ... Engagement part 45 ... Release member 45a ... Support shaft 46 ... Locking part 47 ... Release end 48 ... Release spring 49 ... Release cable 50 ... Tension adjusting mechanism 51 ... Clevis 51a ... Connection hole 52 ... Adjuster shaft 52a ... Head 53 ... Flexible member 54 ... Adjustment nut 55 ... Equalizer 56 ... Connection pin 57 ... Connection nut 60 ... Return spring 65 ... Damper 66 ... Square hole 67 ... Rotation set screw

Claims (2)

In a tension adjusting mechanism of a manual brake device that generates a braking force by transmitting a force to a braking unit via a cable by pivotally supporting a brake lever on a base member and swinging the brake lever.
The tension adjustment mechanism is configured by connecting a pair of connecting members interposed between the cable and the brake lever with an adjuster shaft, and is adjusted by an amount of screwing between the adjuster shaft and one of the connecting members,
A tension adjusting mechanism for a manual brake device, characterized in that a flexible member for rotating the adjuster shaft projects laterally from the axis of the cable and a force applying member is provided at the tip. In a tension adjusting mechanism of a manual brake device that generates a braking force by transmitting a force to a braking unit via a cable by pivotally supporting a brake lever on a base member and swinging the brake lever.
The tension adjusting mechanism is configured by connecting a pair of connecting members of a clevis and an equalizer interposed between a cable and the brake lever by an adjuster shaft, and is adjusted by an amount of screwing between the adjuster shaft and the equalizer. Yes,
A manual brake device characterized in that a flexible member for rotating the adjuster shaft is positioned beside the clevis projecting laterally from the axis of the cable, and a force applying member is provided at the tip of the flexible member. Tension adjustment mechanism.

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