JPH0849743A - Damper and pedal type parking brake using this damper - Google Patents

Abstract

PURPOSE:To provide a damper fit to impart specified resistance to the rotation of a rotating member such as the pedal arm of a pedal type parking brake, a large-sized horizontal pivoted window, and the reclining seat of an automobile or the like. CONSTITUTION:A damper 1 is provided with a rotor 4 provided with a fitting part 3 in order to be fitted rotatably, a rotor 7 provided in the relatively rotatable state to the rotor 4 while forming a clearance 6 for storing a viscous body 5 between the rotors 4, 7, a gear 52 rotatably fitted to the rotor 4 in the same position as the fitting part 3, and a gear 54 fixed to the rotor 7 being meshed with the gear 52. Viscous resistance, viscous shearing resistance in this example, is thereby generated to the viscous body 5 stored in the clearance 6 in the relative rotation of the rotors 4, 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a damper, for example, a pedal arm of a foot parking brake, a large rotating window, a reclining seat of an automobile or the like, and a predetermined resistance to the rotation of the rotating member. Regarding suitable dampers.

[0002]

2. Description of the Related Art As a damper of this type, for example, a housing and a housing are rotatably provided.
A type having a rotating body that generates viscous shear resistance in a viscous body enclosed in the housing by relative rotation with respect to the housing has been conventionally proposed.

[0003]

By the way, in this conventional type of damper, when the relative rotational speed between the housing and the rotating body during operation is the same, whichever rotation of the rotating body with respect to the housing occurs. Since the generated resistance force is the same even at the position, for example, when used as a device for smoothly returning the pedal arm of the foot parking brake to the initial position, the resistance force immediately after the pedal arm is released. If it is designed as a sufficient one, the resistance force in the vicinity where the pedal arm is pivotally returned to the initial position becomes unnecessarily large, and therefore the return time to the initial position of the pedal arm is delayed. , The pedal arm is designed to have low resistance near the initial position, If the desired return time is set, the resistance force immediately after the pedal arm is released is not sufficient, and the pedal arm vigorously rotates to the initial position and the pedal arm collides with the stopper. There is a risk of damage to the pedal arm and stopper.

The present invention has been made in view of the above points, and its object is to provide a rotating member such as a pedal arm of a foot parking brake, a large rotating window, or a reclining seat of an automobile. On the other hand, it is to provide a damper suitable for giving a predetermined resistance force to the rotation.

Further, another object of the present invention is to make it possible to set a desired return rotational speed and required return time for a rotating member, and avoid a collision with a stopper or the like at an initial position. Another object of the present invention is to provide a damper that can eliminate the risk of hammering and damage due to impact.

[0006]

According to the present invention, the object is to accommodate a viscous body between a first rotating body having a mounting portion for rotatably mounting and the first rotating body. And a first gear rotatably attached to the first rotary body, and a second rotary body rotatably provided on the first rotary body with a gap formed between the first rotary body and the first rotary body. A second gear that meshes with a gear and is fixed to a second rotating body, and a viscous body housed in a gap in relative rotation between the first rotating body and the second rotating body. The first and second gears have a defect portion so as to interrupt the transmission of the rotation of the first rotating body to the second rotating body in a predetermined rotation region. Achieved by a damper having a dentition.

According to the present invention, the above object can also be achieved by a foot-operated parking brake using the damper as a pedal arm.

In a preferred example of the present invention, the center of the virtual circle drawn by the tooth row of the first gear is arranged at the center of rotation of the first rotating body, and the center of the virtual circle drawn by the tooth row of the second gear is It may be arranged at the center of rotation of the second rotating body, and, in the rotation of the first rotating body around the mounting portion, the first rotating body may have a rotation torque radius that changes with respect to the second rotating body. The center of the virtual circle drawn by the tooth row of the gear is eccentric from the rotation center of the first rotating body, and the center of the virtual circle drawn by the tooth row of the second gear is the first from the rotation center of the second rotating body. It may be eccentric in the same direction as the eccentric direction of the tooth row of the gear.

According to the present invention, when the first rotating body and the second rotating body rotate relative to each other, viscous resistance is generated in the viscous body accommodated in the gap, thereby obtaining a damper function. However, in a preferred example, a viscous shear resistance may be mainly generated to obtain a damper function. The viscous body has a viscosity coefficient of 1000 to 400.
A viscous body having a viscosity of about 000 poise, such as silicone oil, is preferable, but the viscous body is not limited to this, and another viscous body, such as a viscous fluid, may be used.

[0010]

In the damper of the present invention, when the first rotating body is rotated about the mounting portion, the first rotating body and the second gear mesh with each other so that the second rotating body moves relative to the first rotating body. Is relatively rotated. Due to the relative rotation between the first rotating body and the second rotating body, viscous resistance is generated in the viscous body housed in the gap, which causes the relative rotation between the first rotating body and the second rotating body. And acts as a damper against a member that rotates the first rotating body, for example, the pedal arm of the foot parking brake. Since the tooth rows of the first and second gears have a defective portion and the transmission of the rotation of the first rotating body to the second rotating body is interrupted in a predetermined rotation region, the mounting portion is centered. A desired rotation resistance can be obtained at any rotation position of the first rotating body.

[0011]

SPECIFIC EXAMPLE In FIGS. 1 to 3, the damper 1 of this example is
A first rotating body 4 having a mounting portion 3 for rotatably mounting and a gap 6 accommodating the viscous body 5 are formed between the first rotating body 4 and the first rotating body 4 so as to be rotatable relative to the rotating body 4. Second rotating body 7, a first gear 52 rotatably attached to the rotating body 4 at the same position as the attaching portion 3, and a second gear meshed with the gear 52 and fixed to the rotating body 7. 54, and the viscous body 5 housed in the gap 6 when the rotating body 4 and the rotating body 7 rotate relative to each other.
The viscous resistance, in this example, viscous shear resistance is generated.

The rotating body 4 is provided with a housing main body 11 which is one half-divided body and a lid body 12 which is the other half-divided body, and a housing chamber 13 for housing the viscous body 5 is formed therein. 14 includes a housing body 11 and a lid 1.
The two are closely fitted to each other at their mating surfaces 15 and 16 and fixed by rivets 17 so as not to separate from each other. A seal ring 18 is fitted in an annular recess 19 formed in the mating surface 16 of the lid 12 so that the viscous body 5 does not leak from the mating surfaces 15 and 16 of the housing body 11 and the lid 12. . The housing body 11 is
A substantially elliptical plate-shaped base portion 21, a cylindrical shaft portion 23 integrally formed from one surface 22 of the base portion 21, and a base portion 21 and the shaft portion 23 opened at the other surface 24 of the base portion 21. It has a fitting hole 25 that extends over the axis and is formed concentrically with the shaft portion 23, and a through hole 26 is formed in a portion corresponding to the attachment portion 3. The lid 12 is
A substantially elliptical plate-shaped base portion 31, a cylindrical portion 33 projecting integrally from one surface 32 of the base portion 31 and formed concentrically with the shaft portion 23, and an inner portion integrally formed inward from the cylindrical portion 33. A square annular flange portion 34 is provided, and a through hole 35 that is concentric with and has the same shape as the through hole 26 is provided at a portion corresponding to the attachment portion 3.
Are formed.

The rotating body 7 has an annular plate portion 41 arranged in the accommodating chamber 13, and a shaft portion 23 protruding integrally from the annular plate portion 41.
And a cylindrical portion 42 that is concentrically formed and is rotatably fitted to the shaft portion 23. In the cylindrical portion 42, a ridge 44 is formed on the outer peripheral surface of the cylindrical portion 43 having a small diameter. A plurality of them are integrally formed in the circumferential direction. A seal ring 45 is also provided between the cylindrical portion 33 and the cylindrical portion 42 so that the viscous body 5 does not leak out.

The fan-shaped gear 52 has its cylindrical portion 51 rotatably inserted into the through holes 26 and 35, and thereby rotatably attached to the rotating body 4. Cylindrical part 51
The aluminum collar 61 is fitted in the cylindrical portion 51 such that the teeth 62 and 63 formed on the inner peripheral surface of the cylindrical portion 51 and the outer peripheral surface of the collar 61 mesh with each other so as not to rotate relative to each other. ing. The fan-shaped gear 54 is fixed to the rotating body 7 so as not to rotate relative to each other, by fitting the protrusions 44 into a plurality of groove grooves 71 formed in the through hole 53. The center 76 of the virtual circle 100 having a radius r1 drawn by the tooth row 75 of the gear 52 is eccentric from the rotation center 77 of the rotating body 4 toward the rotation center 80 of the rotating body 7 by a distance L1, and the tooth row 78 of the gear 54 is formed. Virtual circle 1 of radius r2 drawn by
The center 79 of 01 is also a virtual circle 1 drawn by the tooth row 75 of the gear 52.
The eccentric direction of 00 is eccentric from the rotation center 80 of the rotating body 7 by a distance L1. The radius Y of the virtual circle 100 and the radius X of the virtual circle 101 are equal to each other in the present example, but they may be different from each other. Gears 52 and 5
4 includes tooth rows 75 and 78 having cutouts 85 and 86, respectively, so as to interrupt the transmission of the rotation of the rotating body 4 to the rotating body 7 in a predetermined rotation region. In this example, as will be described later, when the damper 1 is applied to the pedal arm of the foot parking brake, the return force of the pedal arm becomes weak as shown in FIG. 6A, in other words, the return speed of the pedal arm. In the initial position P1 of the pedal arm, which is a region where the speed is delayed, and in the vicinity of this position P1, the defective portion 85 and the defective portion 86 face each other so that the meshing between the gear 52 and the gear 54 is released. In this example, the defect portion 85
The upper surface of the concave portion 86 is convex to the outside, and the upper surface of the defective portion 86 is convex to the inside, and the engagement is eliminated by sliding between the upper surfaces of the defective portions 85 and 86.

The damper 1 formed as described above is applied to a foot parking brake 91 as shown in FIG. 4, for example. Here, the damper 1 is used by being fixed to a vehicle body 93 of an automobile by a bolt 92 inserted in a through hole 81 of a collar 61 so that the gear 52 does not rotate. And the pedal arm 94 of the foot parking brake 91
Is rotatably attached to the vehicle body 93 at the same position where the gear 52 is fixed to the vehicle body 93 of the automobile, and is connected to the rotating body 4 at the rotation center of the rotating body 7 with respect to the rotating body 4 on the other hand. So that the pedal arm 94
The shaft portion 95 that is integrally formed with is used by being fitted in the fitting hole 25. In the present invention, the pedal arm 94 does not have to be connected to the rotating body 4 at the center of rotation of the rotating body 7 with respect to the rotating body 4, and may be at another location. The pedal arm 94 is biased by the elastic means 96 so as to be returned to the initial pedal rotation position (the position shown in FIG. 4).

In the foot-operated parking brake 91 with the damper 1 constructed as described above, when the pedal 97 is stepped on, the pedal arm 94 is rotated in the R direction around the portion of the bolt 92, and together with this, the rotary body is rotated. The housing 14 which is 4 is also rotated in the R direction around the portion of the bolt 92. By the rotation of the housing 14, the gear 54 having the tooth row 78 meshing with the tooth row 75 of the gear 52 is rotated in the C direction. When the gear 54 is rotated in the C direction, the rotating body 7 fixed to the gear 54 moves to the housing 14
As a result of being relatively rotated in the C direction with respect to
1 is also rotated relative to the housing 14 in the same direction C, whereby viscous shear resistance is generated in the viscous body 5 in the storage chamber 13, and this viscous shear resistance causes pedal arm 9 to move.
The pedal arm 94 receives the maximum depression position P as shown in FIG.
1 brought to maximum braking. When the depression of the pedal 97 is released at the maximum depression position P1 as shown in FIG. 5, the elastic means 96 causes the pedal arm 9 to move.
4 is rotated in the opposite direction, and during this rotation, viscous shear resistance is generated in the viscous body 5 in the same manner as described above, and this viscous shear resistance imparts a resistance force T to the rotation of the pedal arm 94. Meanwhile, the pedal arm 94 is returned to the initial position P2 as shown in FIG. 4, abuts on a stopper (not shown), and the rotation thereof is stopped.

By the way, the initial rotation position P1 of the pedal arm 94 and the facing portions of the defective portions 85 and 86 are generated in the vicinity of this position to prevent the gear 52 and the gear 54 from meshing with each other. At the moving position P1 and in the vicinity of this position, the annular plate portion 41 is not rotated, and as a result, the resistance force T to the rotation of the pedal arm 94 due to the viscous shear resistance is increased.
Is not given. Further, the center 76 of the tooth row 75 of the gear 52
Is eccentric by a distance L1 from the rotation center 77 of the rotating body 4,
The center 79 of the tooth row 78 of the gear 54 is also the tooth row 75 of the gear 52.
Since the eccentric direction is eccentric from the rotation center 80 of the rotating body 7 by the distance L1, the rotating torque radius X of the rotating body 7 (the gears 52 and 54 The distance between the meshing part of (1) and the rotation center 80 of the rotating body 7 will change so as to increase. On the other hand, the distance Y between the meshing parts of the gears 52 and 54 and the rotation center 77 of the rotating body 4 changes so as to become shorter when the rotating body 4 rotates in the direction opposite to the R direction. Therefore, when the rotating body 4 rotates at a constant speed from the maximum pedal depression position P1 to the pedal initial rotation position P2, the rotating speed of the rotating body 7 gradually decreases. This means that the rotational resistance T of the rotating body 4 caused by the viscous shear resistance of the viscous body 5 is the pedal initial rotation position P1 when the rotating body 4 is rotated at a constant speed around the portion of the bolt 92. It means that it becomes smaller as it gets closer to the
Considering in relation to the spring force of 6, the rotation resistance T of a magnitude corresponding to the magnitude of the spring force of the elastic means 96 is obtained for the rotating body 4.

Further, the resistance force T against the rotation of the pedal arm 94 in the direction toward the pedal initial rotation position P1 by the spring force of the elastic means 96 is defined as F, which is the viscous shear resistance force generated by the viscous body 5. The resistance force (torque) T1 against the rotation of the rotating body 7 due to the force F is T1 = F · X
Then, T = F · Y, and therefore damper 1
Then, when the pedal arm 94 is rotated from the maximum pedal depression position P2 to the pedal initial rotation position P1 by the elastic means 96, the pedal arm 94 is moved to the pedal initial rotation position P.
As the rotation torque radius X gradually increases and the distance Y gradually decreases as the value approaches 1, the resistance force T to the pedal arm 94 is as shown in FIG. 6A.
It gets smaller and smaller. Further, at the initial rotation position P1 and in the vicinity of this position, the meshing between the gear 52 and the gear 54 is released and the annular plate portion 41 is not rotated. Not given As described above, in the damper 1, as shown in FIG. 6A, at the beginning of the operation of returning the pedal arm 94 from the maximum depression position P2 to the initial position P1, the pedal arm 9
4 is rotated relatively slowly due to the large resistance T. On the other hand, when the pedal arm 94 is rotated near the initial position P1, even if the elastic force of the elastic means 96 becomes weak,
Due to the small resistance force T, the pedal arm 94 is rotated relatively quickly. In addition, at the initial rotation position P1 and in the vicinity of this position, the gear 52 and the gear 54 do not mesh with each other, so that the resistance force T is not given, and even if the elastic force of the elastic means 96 becomes weak as described above. The pedal arm 94 is quickly and smoothly rotated to return to the initial rotation position. Thus, the foot-operated parking brake 9 equipped with the damper 1
1, the damper 1 is designed such that the pedal arm 94 can be prevented from crashing into the stopper and the like, and the pedal arm 94 can be swung in the vicinity of the initial position as desired.
Since the pedal arm 94 is relatively slowly rotated in the direction opposite to the R direction from the beginning of the return rotation to the initial position, the collision of the pedal arm 94 with the stopper by the first high-speed rotation is ensured. It can be lost.

In the above description, the centers 76 and 79 of the tooth rows 75 and 78 are eccentric, but instead of this, the centers 76 and 79 of the tooth rows 75 and 78 are respectively eccentric.
The center of rotation 77 of the rotating bodies 4 and 7 is not eccentric.
And 80, and a damper exhibiting the characteristics as shown in FIG. 6B may be used. Further, in the above description, the defective portion 85 is provided only in the initial rotation position P1 of the pedal arm 94 and in the vicinity of this position P1. Gears 52 and 5 such that 86 and 86 face each other.
However, instead of this, the gears 52 and 54 may be configured to have defective portions in a plurality of regions, and a damper having the characteristics as shown in FIG. 6C or 6D may be used. That is, it is sufficient to configure a damper that exhibits characteristics that match the object to be used.

[0020]

As described above, according to the present invention, the first and second gears are damaged so that the rotation of the first rotating body is interrupted from being transmitted to the second rotating body in a predetermined rotation region. Since it has a tooth row having parts, a predetermined resistance force is given to the rotation of a rotating member such as a pedal arm of a foot parking brake, a large rotating window, a reclining seat of an automobile, etc. In addition, it is possible to achieve desired return rotational speed and required return time for the rotating member, and it is possible to avoid collision with a stopper or the like at the initial position, and The risk of damage due to impact can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view of a preferred embodiment of the present invention.

FIG. 2 is a front view of the specific example shown in FIG.

FIG. 3 is an enlarged partial front view of the specific example shown in FIG.

FIG. 4 is an explanatory view of an example in which the specific example shown in FIG. 1 is used for a pedal arm of a foot parking brake.

5 is an operation explanatory diagram of the example of FIG. 4. FIG.

6 is a characteristic diagram of various preferable specific examples of the present invention, (a) is a characteristic diagram of the specific example shown in FIG. 1, (b),
(C) And (d) is a characteristic view of another specific example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Damper 3 Attachment part 4 1st rotary body 5 Viscous body 6 Gap 7 2nd rotary body 52 1st gear 54 Second gear 85,86 Defective part

Claims (5)

[Claims] 1. A first rotary body having a mounting portion for rotatably mounting, and a gap for accommodating a viscous body formed between the first rotary body and the first rotary body, and the first rotary body is opposed to the first rotary body. Second rotator that is rotatably provided, a first gear that is rotatably attached to the first rotator, and a first gear that meshes with and is fixed to the second rotator. A second gear, and when the first rotating body and the second rotating body rotate relative to each other, viscous resistance is generated in the viscous body housed in the gap. And the second gear includes a tooth row having a defective portion so as to interrupt the transmission of the rotation of the first rotating body to the second rotating body in a predetermined rotation region. 2. The damper according to claim 1, wherein when the first rotating body and the second rotating body rotate relative to each other, viscous shear resistance is generated in the viscous body housed in the gap. . 3. The center of the virtual circle drawn by the tooth row of the first gear is eccentric from the rotation center of the first rotating body, and the center of the virtual circle drawn by the tooth row of the second gear is the second center. 3. The damper according to claim 1, wherein the damper is eccentric in the same direction as the eccentric direction of the virtual circle drawn by the tooth row of the first gear from the rotation center of the rotating body. 4. The center of a virtual circle drawn by the tooth row of the first gear is arranged at the center of rotation of the first rotating body, and the center of the virtual circle drawn by the tooth row of the second gear is The damper according to claim 1 or 2, which is arranged at the center of rotation of the second rotating body. 5. A foot-operated parking brake using the damper according to any one of claims 1 to 4 for a pedal arm.