JPH0849744A - 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 for storing a viscous body 5 between the rotors 4, 7, and a rotation transmission means 8 for transmitting the rotating quantity of the rotor 4 around the fitting part 3 non-linearly to the rotor 4 and changing resistance to the rotation of the rotor 4 around the fitting part 3 caused by the viscous resistance of the viscous body 5 generated by the relative rotation of the rotors 4, 7 in association with the rotation of the rotor 4 around the fitting part 3.

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 will not be sufficient immediately after the pedal arm is released, and the pedal arm will vigorously rotate to the initial position, causing the pedal arm to collide with the stopper, resulting in impact and impact. 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.

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 to prevent a collision with a stopper or the like at an initial position. (EN) It is possible to provide a damper that can be avoided to eliminate the risk of hitting sound, damage due to impact, and the like.

[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. The rotation amount of the second rotating body, which is provided rotatably relative to the first rotating body with a gap formed between the first rotating body and the first rotating body centered on the mounting portion, is nonlinear to the second rotating body. And the viscous resistance of the viscous body generated by the relative rotation of the first rotating body and the second rotating body in the rotation of the first rotating body around the attachment site. This is achieved by a damper including a rotation transmission means that changes a resistance force with respect to the rotation of the first rotating body around the mounting portion.

Further, according to the present invention, the above object is also achieved by a foot-operated parking brake using the damper as a pedal arm.

The rotation transmission means of the present invention is configured to change the resistance force based on the rotation angle between the first rotating body and the second rotating body, or May be configured so as to change the rotational torque radius of the second rotating body with respect to the rotating body to change the resistance force, and as a preferable example thereof, the first rotating body is arranged at the same position as the mounting site. A first arm having one end rotatably attached to a rotating body, a second arm having one end fixed to a second rotating body, and a second arm with respect to the other end of the first arm. The engaging means for engaging the other end of the first arm and the second arm relatively movably and rotatably can be mentioned. The fitting groove formed on the other end of one of the arms It may be provided with a piece movably fitted in the groove and a shaft body rotatably supporting the piece and provided at the other end of the other arm of the first and second arms. The fitting groove formed in the other end of one of the first and second arms, the piece movably fitted in the fitting groove, and the piece fixed to each other, Even if a shaft body rotatably provided at the other end of the other arm of the first and second arms is provided, further, at the other end of one arm of the first and second arms. The formed fitting groove,
It may be movably fitted in the fitting groove, and may have a cylindrical body or a cylindrical body provided at the other end of the other arm of the first and second arms, or may have either. The point is that the other end of the second arm is movably and rotatably engaged with the other end of the first arm.

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, viscous shear resistance may be mainly generated to obtain the damper function. As a viscous body, the viscosity coefficient is 100
A viscous body having a porosity of 0 to 400000 poise, such as silicone oil, is preferable, but the viscous body is not limited to this, and another viscous body, such as 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 second rotating body is relatively rotated with respect to the first rotating body via the rotation transmitting means. It 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. Against the member that rotates the first rotating body, for example, the pedal arm of the foot parking brake. The rotation transmitting means nonlinearly transmits the rotation amount of the first rotating body about the mounting portion to the second rotating body, and the rotation of the first rotating body about the mounting portion To change the resistance force to the rotation of the first rotating body centered on the attachment site due to the viscous resistance of the viscous body caused by the relative rotation between the rotating body of the second rotating body and the rotating body of the second rotating body. A desired rotation resistance can be obtained at an arbitrary rotation position of the first rotating body centering on the attachment site.

The invention will now be described in more detail with reference to the preferred embodiments shown in the drawings. The present invention is not limited to these specific examples.

[0012]

SPECIFIC EXAMPLE In FIGS. 1 and 2, 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. The rotation amount of the second rotating body 7 and the rotating body 4 about the mounting portion 3 is transmitted to the rotating body 7 in a non-linear manner, and the rotating body 4 rotates about the mounting portion 3 as a center. Rotation transmission means for changing the resistance force to the rotation of the rotating body 4 around the mounting portion 3 caused by the viscous resistance of the viscous body 5 caused by the relative rotation of the rotating body 4 and the rotating body 7. 8 and. In this example, viscous shear resistance is generated in the viscous body 5 by the relative rotation of the rotating body 4 and the rotating body 7.

The rotating body 4 is provided with a housing body 11 which is one half-divided body and a lid body 12 which is the other half-divided body, and has a housing chamber 13 for housing the viscous body 5 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.

In this example, the rotation transmitting means 8 has a first arm 52 having one end 51 rotatably attached to the rotating body 4 at the same position as the attachment portion 3, and one end 53 fixed to the rotating body 7. A second arm 54 and an engaging means 57 for engaging the other end 55 of the arm 52 with the other end 56 of the arm 54 so as to be movable in the A direction and rotatable in the B direction. It has. One end 5 of arm 52
1 is formed in a cylindrical shape, is rotatably inserted into the through holes 26 and 35, and is thereby rotatably attached to the rotating body 4. At one end 51 of the cylindrical shape, an aluminum collar 61 is prevented from rotating relative to each other by meshing of teeth 62 and 63 formed on the inner peripheral surface of the one end 51 and the outer peripheral surface of the collar 61, respectively. , It is fitted. One end 53 of the arm 54 formed in a cylindrical shape is
The ridges 44 are fitted in a plurality of ridge grooves 71 formed on the inner peripheral surface of the ridge 44 and fixed to the rotating body 7 so as not to rotate relative to each other. The engagement means 57 is, in this example, the fitting groove 7 formed in the other end 56 of the arm 54 so as to extend in the A direction.
6, a rectangular parallelepiped piece 77 that is fitted in the fitting groove 76 so as to be movable in the A direction, and a piece 77 that is rotatably supported in the B direction and is integrally provided on the other end 55 of the arm 52. And a columnar shaft body 79.

The damper 1 formed as described above is applied to a foot parking brake 81 as shown in FIG. 3, for example. Here, the damper 1 uses the bolt 83 inserted into the through hole 82 of the collar 61 to fix the one end 5 of the arm 52.
1 is used by being fixed to a vehicle body 84 of an automobile so as not to rotate. The pedal arm 85 of the stepping parking brake 81, on the other hand, at the same position where one end 51 of the arm 52 is fixed to the vehicle body 84 of the automobile,
On the other hand, the shaft portion 91 integrally formed with the pedal arm 85 is fitted into the fitting hole 25 so as 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. Is used. In the present invention,
The pedal arm 85 does not need 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 85 is biased by the elastic means 92 so that the pedal arm 85 is pivotally returned to the pedal initial pivot position (the position shown in FIG. 3). In this example, the arm 52
A line 95 connecting the rotation center 93 of the arm 54 and the rotation center 94 of the arm 54, a line 97 connecting the rotation center 93 of the arm 52 and the rotation center 96 of the bridge 77, and the intersection angle α are 50 ° at the pedal initial rotation position. The damper 1 and the pedal arm 85 are attached so that the maximum pedaling position (position shown in FIG. 4) becomes 0 °.

In the foot-operated parking brake 81 with the damper 1 configured as described above, when the pedal 98 is stepped on, the pedal arm 85 is rotated in the R direction around the portion of the bolt 83, and together with this, the housing 14 Is also rotated in the R direction around the portion of the bolt 83. The other end 5 of the arm 52 is rotated by the rotation of the housing 14.
5 which engages with the other end 56 via the engaging means 57
4 is rotated in the C direction. During this rotation in the C direction, the bridge 77 rotatably attached to the other end 55 of the arm 52 via the shaft 79 is rotated and along the fitting groove 76 formed in the other end 56 of the arm 54. Move in direction A. When the arm 54 is rotated in the C direction, the rotating body 7 to which one end 53 of the arm 54 is fixed is relatively rotated in the C direction with respect to the housing 14, and as a result, the annular plate portion 41 is also attached to the housing 14. On the other hand, it is also relatively rotated in the C direction, so that viscous shear resistance is generated in the viscous body 5 of the storage chamber 13,
The viscous shearing resistance gives a resistance force to the rotation of the pedal arm 85, and the pedal arm 85 is brought to the maximum depression position as shown in FIG. 4, and the maximum brake is applied. When the depression on the pedal 98 is released at the maximum depression position as shown in FIG. 4, the elastic means 92 causes the pedal arm 85 to rotate in the opposite direction to the above, and during this rotation, the viscous body 5 is moved in the same manner as described above. A viscous shear resistance is generated on the pedal arm 85, and the pedal arm 85 is returned to the initial position as shown in FIG.
And the rotation is stopped.

By the way, the transmission characteristic relating to the rotation amount of the rotation transmission means 8 of the present example is described by referring to the rotation center 94 of the arm 54 and the piece 7.
Crossing angle β between the line 99 connecting the rotation center 96 of 7 and the line 95
From the relationship between the above and the crossing angle α, Equation 1 is obtained.

[0019]

(Equation 1)

Here, L is the center of rotation 93 and the center of rotation 94.
And M is the distance between the center of rotation 93 and the center of rotation 96. And as an example, the distance L = 43.13 mm, M
= 27.63 mm, Table 1 shows the relationship between the crossing angle α and the crossing angle β. As described above, the rotation transmitting means 8 of the present example transmits the rotation amount of the rotating body 4 to the rotating body 7 in a non-linear manner as represented by Expression 1.

[0021]

Table 1 Cross angle α ° Cross angle β ° 0 0 10 16.77 20 28.83 30 35.73 40 40.96 50 39.84

As is clear from Table 1, in the damper 1, the maximum pedal depression position (α = 0 °, β = 0 °) to the pedal initial rotation position (α = 50 °, β = 39.84).
In the process of returning to α), while the angle α changes from 0 ° to 10 °, the angle β changes by 16.77 °.
Is only changed by 0.88 ° during the change of 40 ° to 50 °, therefore, the rotation of the rotating body 4 at a constant speed from the maximum pedal depression position to the pedal initial rotation position causes the rotating body 7 to rotate. The rotation speed gradually decreases. This means that the rotational resistance of the rotating body 4 caused by the viscous shear resistance of the viscous body 5 approaches the pedal initial rotation position when the rotating body 4 is rotated at a constant speed around the portion of the bolt 83. When it is considered in relation to the spring force of the elastic means 92 for returning, a rotation resistance of a magnitude corresponding to the magnitude of the spring force of the elastic means 92 is applied to the rotating body 4. Will be obtained.

In the rotation transmission means 8, the relationship between the rotation torque radius X (distance between the rotation center 94 and the rotation center 96) and the angles α and β with respect to the rotating body 7 is Msin α = Xs.
in β, where X = L−M when α = 0 °. As a result, the rotational torque radius X becomes minimum at the maximum pedal depression position (α = 0 °, β = 0 °), and becomes maximum at the pedal initial rotation position (α = 50 °, β = 39.84 °). That is, the rotational torque radius X increases as the pedal initial rotation position approaches. On the other hand, the sum (α + β) of the angle α of the rotating body 4 and the angle β of the rotating body 7 is minimum at the maximum pedal depression position and maximum at the pedal initial rotation position. That is, the sum of the angle α of the rotating body 4 and the angle β of the rotating body 7 (α +
β) becomes large. By the way, as is apparent from FIG. 5, the resistance force (torque) T against the rotation of the pedal arm 85 in the direction toward the pedal initial rotation position by the spring force of the elastic means 92 is the viscous shear resistance force generated by the viscous body 5. Is defined as F1 and the viscous shear resistance force F1 causes the rotor 7 to rotate.
Resistance (torque) T1 to the rotation of T1 = F1 · X
Then, it becomes like Formula 2.

[0024]

(Equation 2)

Therefore, in the damper 1, the pedal arm 8
When 5 is rotated by the elastic means 92 from the pedal maximum depression position to the pedal initial rotation position, the pedal arm 85
Is closer to the pedal initial rotation position, the rotational torque radius X gradually increases, and the sum (α + β) of the angle α of the rotating body 4 and the angle β of the rotating body 7 gradually increases. As described above, the resistance force (torque) T to the pedal arm 85 gradually decreases. That is, in the damper 1, the rotation transmission means 8 rotates the rotating body 4 about the portion of the bolt 83 caused by the viscous resistance of the viscous body 5 caused by the relative rotation of the rotating body 4 and the rotating body 7. The resistance force T against is changed based on the rotation angles α and β between the rotating body 4 and the rotating body 7. In this example, the rotating body 4
Of the angle α and the angle β of the rotating body 7 (α + β), and the resistance force T is changed by changing the rotational torque radius X of the rotating body 7 with respect to the rotating body 4. In this example, it is configured to be changed so as to become gradually smaller. As described above, in the footstep parking brake 81 including the damper 1, the resistance force (torque) T to the pedal arm 85 gradually decreases as the pedal arm 85 approaches the pedal initial rotation position. In combination with the function, the pedal arm 8 is associated with the spring force of the elastic means 92.
It is possible to avoid the collision of the stopper 5 with the stopper 5 and to speed up the rotation of the pedal arm 85 near the initial position as desired.

By the way, in the above description, the piece 77 is rotatably attached to the shaft 79, but instead of this, the piece 77 is attached to the shaft 7.
9, the shaft 79 may be rotatably provided on the other end 55 of the arm 52, or the piece 77 may be rotatably provided on the shaft 79 so that the shaft 79 also has the other end 55 of the arm 52. However, in the above description, in order to increase the mechanical strength, the engaging means 57 is configured by using the piece 77 arranged in the fitting groove 76 so as to make surface contact. Instead of using the piece 77, a cylindrical body or a cylindrical body may be provided at the other end 55 of the arm 52 so as to make a line contact in the fitting groove 76 to constitute the engaging means. The cylindrical body or the cylindrical body may be rotatably attached or fixed to the other end 55 of the arm 52, but it is preferably rotatably attached to ensure smooth movement and rotation.

[0027]

As described above, according to the present invention, the rotation amount of the first rotating body centering on the mounting portion is transmitted to the second rotating body in a non-linear manner, and the first rotating body centering on the mounting portion is used. In the rotation of the first rotating body, the rotation of the first rotating body centered on the attachment site due to the viscous resistance of the viscous body caused by the relative rotation between the first rotating body and the second rotating body Since a rotation transmission means for changing the resistance force to the vehicle is provided, the rotation of the pedal arm of the foot parking brake, a large rotating window, a reclining seat of an automobile, etc. Resistance force can be applied, and the return rotation speed and return required time for the rotating member can be set to desired values, and collision with a stopper or the like at the initial position can be avoided. Can be made, tapping sound, impulse It can eliminate the risk of breakage of the depends on.

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

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

5 is an operation explanatory diagram of the example of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Damper 3 Attachment site 4 First rotating body 5 Viscous body 6 Gap 7 Second rotating body 8 Rotation transmission means

Claims (9)

[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. The second rotating body, which is rotatably provided, and the rotation amount of the first rotating body centered on the mounting portion are transmitted to the second rotating body in a non-linear manner, and In the rotation of the first rotating body, the rotation of the first rotating body centered on the attachment site due to the viscous resistance of the viscous body caused by the relative rotation between the first rotating body and the second rotating body A damper having a rotation transmitting means for changing the resistance force against the damper. 2. The damper according to claim 1, wherein the rotation transmitting means is configured to change the resistance force based on a rotation angle between the first rotating body and the second rotating body. 3. The damper according to claim 1, wherein the rotation transmission means is configured to change a resistance torque by changing a rotation torque radius of the second rotating body with respect to the first rotating body. . 4. The rotation transmitting means comprises a first arm having one end rotatably attached to the first rotating body at the same position as the attachment portion, and a first arm having one end fixed to the second rotating body. A second arm, and an engagement means for engaging the other end of the second arm with the other end of the first arm so as to be movable and rotatable relative to each other.
The damper according to any one of 1. 5. The engaging means includes a fitting groove formed in the other end of one of the first and second arms, a piece movably fitted in the fitting groove, and The damper according to claim 4, further comprising a shaft member that rotatably supports the bridge and that is provided at the other end of the other arm of the first and second arms. 6. The engagement means includes a fitting groove formed in the other end of one of the first and second arms, a piece movably fitted in the fitting groove, and The pieces are fixed,
The damper according to claim 4, further comprising a shaft body rotatably provided at the other end of the other arm of the first and second arms. 7. The engagement means includes a fitting groove formed in the other end of one of the first and second arms and a fitting groove movably fitted in the fitting groove. The damper according to claim 4, further comprising a cylindrical body or a cylindrical body provided at the other end of the other arm of the second arms. 8. The viscous shear resistance is generated in the viscous body housed in the gap when the first rotating body and the second rotating body are rotated relative to each other. The damper described in paragraph 1. 9. A foot-operated parking brake using the damper according to claim 1 for a pedal arm.