WO1999041120A1

WO1999041120A1 - Locking mechanism for parking brakes

Info

Publication number: WO1999041120A1
Application number: PCT/JP1998/005831
Authority: WO
Inventors: Osamu Kuno
Original assignee: Kuno Kinzoku Kogyo Kabushiki Kaisha
Priority date: 1998-02-10
Filing date: 1998-12-21
Publication date: 1999-08-19
Also published as: JPH11222112A; JP3450174B2

Abstract

A locking mechanism for parking brakes, wherein a receiving member (7) which has outer and inner grip surfaces (8, 9) curved arcuately around a position as a center of the arc in the vicinity of the center (a) of tilt movement of a tiltably moved brake operating member (2), and which is combined with the brake operating member (2), is inserted through a through hole (11) of a locking member (10) pivotably joined to a bracket (1), the receiving member (7) being locked with respect to a returning direction with first and second locking hole edges (12, 13), which are formed on diagonal lines of a longitudinal section of the through hole (11), contacting the two grip surfaces (8, 9) and gripping the receiving member (7), the receiving member (7) being unlocked with the two locking hole edges (12, 13) leaving the two grip surfaces (8, 9) and releasing the receiving member (7).

Description

Description Lock mechanism in parking brake system

The present invention relates to a lock mechanism in a parking brake device for an automobile. Background art

Among conventional parking brake devices for automobiles, a foot-operated parking brake device has a bracket 50 fixed to the vehicle body that is tiltably supported by a support shaft 51, as shown in Fig. 12. The brake wire 52 has been pulled and the brake wire 52 has been loosened! A brake pedal 54, which is switched by a stepping operation and a release wire 53, is coupled to the tip of the brake pedal 54, and a claw portion of a holder 56, which is rotatably coupled to a bracket 50, is connected to the brake pedal 54. The ratchet 55 that stops the brake pedal 54 from rotating is fixed.

Then, when the brake pedal 54 is depressed and tilted in the direction in which the braking action is applied, the ratchet 55 is stopped from rotating by the holder 56 at the tilt end of the brake pedal 54, and the brake pedal 54 is locked at the tilt end. You. Further, when the release wire 53 is pulled to tilt the holder 56, the engagement between the holder 56 and the ratchet 55 is released, and the brake pedal 54 is returned to its original position by the spring force of the spring 58. After returning to the position, the rotation is stopped at the rotation end by the lay-out 55, and the shock force at the time of the return rotation of the brake pedal 54 is absorbed by the shock absorber 59. In the manually operated parking brake device shown in FIG. 13, the ratchet 60 fixed to the vehicle body and having the tooth portion 60 a is supported by the support shaft 61 so as to be tiltable. The base end of the brake lever 62 is connected to the brake lever 62. The brake lever 62 is connected to the release member 63 so as to correspond to the teeth 60a of the ratchet 60. The brake lever 62 is tilted to the tilting end in the direction in which the brake action is performed when the brake lever 65 is pulled and the ratchet 60 is rotated. The configuration is such that the brake lever 62 is locked by the engagement between the tooth portion 60 a and the holder 64.

In the above-described step operation type and manual operation type parking brake devices, there is a problem that the structure of the lock mechanism is complicated and the cost is increased. It is an object of the present invention to simplify the structure of the locking mechanism that locks and to enhance the locking state of the locking mechanism. Disclosure of the invention

In order to solve the above-mentioned problem, the invention according to claim 1 includes a bracket fixed to a vehicle body, the bracket having an outer gripping surface curved in a convex arc shape and an inner gripping surface curved in a concave arc shape. Alternatively, the bracket has a receiving member connected to a brake operating member that is tiltably connected to the bracket, and a through hole through which the receiving member passes, and is connected to the release member so as to be connected to the release member. An opening member that swings by operating the release member is installed such that a relative position between the receiving member and the opening member changes with the tilting operation of the brake operation member; The hole holds the receiving member in a state of being circumscribed and inscribed on the outer gripping surface and the inner gripping surface, and A first locking hole edge and a second locking hole edge which release the receiving member away from the outer gripping surface and the inner gripping surface by operating the release member. Is formed.

In the invention according to claim 1, a receiving member having an outer gripping surface curved in a convex arcuate surface and an inner gripping surface curved in a concave circular arc shape, and a hook member having a through hole through which the receiving member is inserted. Relative position changes with the tilting operation of the brake operation member. When the first locking hole edge and the second locking hole edge formed in the through hole of the lock member contact the outer gripping surface and the inner gripping surface of the receiving member, respectively, the receiving member is gripped by the locking hole edges and received. The relative positions of the member and the hook member are prevented from being shifted by the edges of the locking holes, and the brake operating member is locked. When the locking member swings due to the operation of the release member, and both locking hole edges are separated from the outer gripping surface and the inner gripping surface, respectively, the receiving member is released from the locking hole edges and the receiving member and the hook are released. The relative position of the members is allowed to shift, and the brake operating member is unlocked. When a force that shifts the relative position between the receiving member and the locking member is applied to the edges of the locking holes, the check action by the edges of the locking holes acts on the receiving member, and the opening of the brake operating member is reduced. Is strengthened.

Further, according to the invention of claim 2, in the invention of claim 1, the arc centers of the outer gripping surface and the inner gripping surface are arranged near the tilt center of the brake operating member, and the first locking hole edge and the second (2) It has a configuration in which the locking hole edge is arranged on a diagonal line of a vertical cross section of the through hole.

According to the second aspect of the present invention, when the relative position between the receiving member and the buckle member is changed by the tilting operation of the brake operating member, the relative position between the two gripping surfaces and the two locking hole edges is changed to the entire sliding of the brake operating member. The same goes for the trokes. In addition, when the lock member swings, the front projection length of the through hole increases and decreases, and the first and second locking hole edges formed in the through hole of the lock member are outside the receiving member. It comes into contact with and separates from the gripping surface and the inner gripping surface. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view of a parking brake device according to a first embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view taken along line X1-X1 in FIG. FIG. 3 is an explanatory diagram illustrating an arrangement state of the first locking hole edge and the second locking hole edge. FIG. 4 is a side view of the main part when the brake operation member is tilted to the release-side tilt end. FIG. 5 is an enlarged view taken along line X2-X2 in FIG. FIG. 6 is a side view of a main part when the brake operating member is tilted to the tilt end on the braking side. FIG. 7 is an enlarged view taken along line X3-X3 in FIG. FIG. 8 is an explanatory diagram illustrating a locked state and an unlocked state by the lock member. FIG. 9 is a side view of a parking brake device according to a second embodiment of the present invention. FIG. 10 is an enlarged sectional view taken along line X4-X4 in FIG. Figure 11 is an enlarged side view of the main part. FIG. 12 is a side view of a conventional foot-operated parking brake device, and FIG. 13 is a side view of a conventional manually-operated parking brake device. BEST MODE FOR CARRYING OUT THE INVENTION

Next, a first embodiment in which the present invention is applied to a foot-operated parking brake device will be described with reference to FIGS.

A bracket 1 fixed to the vehicle body diagonally below the driver's seat has a brake operating member (brake pedal) 2 for a parking brake, which is tiltably supported by a support shaft 3 and tilts back and forth by stepping on the foot. The brake operation member 2 is provided with a foot pedal 2a at the lower end thereof.

The brake operating member 2 has a brake The base end of the brake wire 4 whose front end is fixed to a braking member such as a kish is fixed.

The brake operating member 2 is installed with one end hooked on the bracket 1 and the other end hooked on the brake operating member 2, and is returned by the return spring 5 that tilts the brake operating member 2 backward. It is biased in the tilting direction.

When parking, the foot pedal 2a of the brake operating member 2 is depressed forward to incline the brake operating member 2 to the tilting end on the braking side, and the brake wire 4 is pulled by the brake operating member 2 to exert a braking action on the wheels. Added.

In a state where the brake operating member 2 is returned and tilted to the tilting end on the releasing side by the repulsive force of the return spring 5, the braking action on the wheels is released.

To the upper end of the brake operating member 2, a receiving member 7 which is cantilevered and tiltably supported by a support shaft 6 fixed to the upper end is connected.

The receiving member 7 moves in an arc to a rearward moving end and a frontward moving end in accordance with the tilting operation of the brake operating member 2 to the tilting end on the braking side and the tilting end on the releasing side.

The receiving member 7 has a vertically long rectangular cross-sectional shape. The receiving member 7 has an outer gripping surface 8 curved in a convex arc shape around the tilt center a of the brake operating member 2 as an arc center. The receiving member 7, which is disposed inside the gripping surface 8 and is formed in parallel with the inner gripping surface 9 which is concentric with the outer gripping surface 8 and is curved in a concave arc shape, has both gripping surfaces when tilted. The arc centers of 8, 9 are arranged so as to move in an arc through the tilt center a of the brake operating member 2.

In the vicinity of the upper end of bracket 1, the brake operating member cooperates with the receiving member 7. Locking member 10 for locking and unlocking 2 is connected, and this locking member 10 can be swung upward and backward by supporting pins 15 penetrated at its upper end and fixed to bracket 1. It is supported by. The mouthpiece 10 includes a rectangular plate-shaped base piece 10a, and a pair of side pieces 10b connected to both side edges of the base piece 10a, respectively. It is formed in a U shape.

The release lever 16 connected to the tip of the lip member 10 is connected to the base end of a release member (release wire) 17 that is pulled and operated by the driver. The release lever 16 is urged forward by the spring 18.

The buckle member 10 is disengaged from the spring 18 when the brake operating member 2 is tilted to the release-side tilting end and the release lever 16 is released from the pulling action of the release member 17. It swings forward and downward by the elastic force and is held at the forward and downward swinging end, the brake operating member 2 tilts to the release side tilting end, and the release lever 16 is pulled backward by the release member 17. In this state, it swings rearward and upward to come into contact with the stopper 19 and is held at the swinging end of the rear upper part.

The base piece 10a of the lip member 10 has a rectangular hole rim shape substantially equal to the cross-sectional shape of the receiving member 7, and the receiving member 7 is formed in a state where a slight gap can be formed. There is a through hole 11 through which is inserted.

When the brake operating member 2 is tilted to the tilting end on the braking side and the receiving member 7 moves in an arc to the rearward moving end, the vicinity of the distal end of the receiving member 7 is inserted into the through hole 11 of the lock member 10 and the brake operation is performed. When the member 2 tilts to the tilting end on the release side and the receiving member 7 moves in an arc toward the front moving end, the vicinity of the base end of the receiving member 7 is inserted into the through hole 11 of the lock member 10.

The lock member 10 is inserted into the through hole 11 of the lock member 10. When the rocker is released from the pulling operation by 7 and returns to the front swinging end and swings, it grips the receiving member 7 from the outside and the inside while circumscribing and inscribed on the outer gripping surface 8 and the inner gripping surface 9 of the receiving member 7. To prevent the movement of the receiving member 7 and the shift of the relative position between the receiving member 7 and the lock member 10, and the buckle member 10 swings to the rear swing end by pulling the release member 17. When it comes into contact with the stopper 19, it is allowed to move away from the outer gripping surface 8 and inner gripping surface 9 of the receiving member 7 and to shift the relative position between the receiving member 7 and the lock member 10. A first locking hole edge 12 and a second locking hole edge 13 are formed.

The first locking hole edge 12 is formed at the base end of the opening end face 11a on one side of the through hole 11 among the hole edges of the through hole 11, and the second locking hole edge 13 is Of the hole edge of the hole 11, formed at the tip end of the open end surface 1 1 b opposite to the through hole 11 1, both locking hole edges 1 2, 13 diagonally cross the cross section of the through hole 11 It is arranged on the diagonal line i.

In a state in which the edges 12 and 13 of the locking holes are in contact with the gripping surfaces 8 and 9, both end surfaces 11 a and 11 b of the through hole 11 are outside the edges 12 of the first locking hole. It is substantially parallel to a line segment b connecting the contact point c with the gripping surface 8 and the tilt center a of the brake operating member 2.

In FIG. 3, among the diagonal lines of the longitudinal cross section of the through hole 11, the diagonal line connecting both the locking hole edges 12 and 13 is denoted by i, and the lock member 10 swings to the swinging end on the unlock side and the two members are locked. The open end face 11a of the through hole 11 on the unlock side of the through hole 11 with the stopper hole edges 12 and 13 separated from the gripping surfaces 8 and 9 is defined as a reference plane, and the inclination of a diagonal line i with respect to the reference plane is defined as A. Let g be the front projection length of the through hole 11 with respect to the reference plane when the diagonal i is further inclined by B (the horizontal component of the diagonal i), and the front projection length of the through hole 11 when unlocked with respect to the reference plane. Is e * cos A, g is e.cos (A + B) Becomes f.

Therefore, the front projection length g of the through hole 11 decreases as the inclination of the diagonal line i increases.

When the buckle member 10 swings to the rear swinging end, the front projection length of the through hole 11 with respect to the reference plane becomes the maximum, and the locking hole edges 1 2 and 1 3 are respectively gripped outside. The state is separated from the surface 8 and the inner gripping surface 9.

When the buckle member 10 swings forward, the through hole 11 is inclined, the front projection length of the through hole 11 is reduced, and the horizontal component of the diagonal line i is shortened, so that both locking hole edges 1 2, 1 3 is in a temporary lock state in contact with the outer gripping surface 8 and the inner gripping surface 9 respectively.

When the first locking hole edge 12 is circumscribing the outer gripping surface 8 at an arbitrary position, the second locking hole edge 13 is connected to the contact point between the first locking hole edge 12 and the outer gripping surface c. And the receiving member 7 is inscribed in the inner gripping surface 9 at a position shifted from the line segment b connecting the tilting center a of the brake operating member 2 It is in a state of being caught.

When the edges 12 and 13 of the locking holes are in contact with the outer gripping surface 8 and the inner gripping surface 9 respectively, the edges 12 and 13 of the locking holes act as a one-way clutch, and the locking member 10 is moved rearward. The receiving member 7 is allowed to move in the locking direction to move the first locking edge 12 in a circular arc backward by pushing the locking member 10 forward, but the locking member 10 is pressed forward to move the first locking edge 12 to the first locking edge. The movement of the receiving member 7 in the unlocking direction for moving the 1 2 in a circular arc forward, that is, the movement of the receiving member 7 in the returning direction is prevented by the non-return action of the locking hole edges 1 2 and 1 3. The non-return action of the locking holes 12 and 13 is enhanced as the pressing force for pressing the hook member 10 in the return direction increases.

During the lock operation to release the lock state of the receiving member Ί and the brake operating member 2, the brake operating member 2 tilted to the tilting end on the braking side is slightly Pushing forward, the receiving member 7 is pulled back slightly backward, and both locking hole edges 1 2, 13 strongly biting into the outer gripping surface 8 and the inner gripping surface 9 are released from the biting position. The receiving member 7 is rocked to the rear rocking end in contact with the stopper 19 by pulling the storage member 17.

When the receiving member 7 swings rearward and upward and comes into contact with the stopper 19, the edges 12 and 13 of the two locking holes separate from the outer gripping surface 8 and the inner gripping surface 9 and the first locking hole edge 1 2 and the outer gripping surface 8, and between the second locking hole edge 13 and the inner gripping surface 9, a narrow slit-like gap is formed, and the receiving member 7 is formed with both locking holes. The receiving members 7 and the brake operating member 2 are released from the gripping state by the edges 12 and 13 and are in the unlocked state.

When parking the car, release the lock member 10 by pulling the release member 17 and swing it to the front swinging end, and then depress the foot pedal 2a of the brake ÷ operation member 2 forward. When the brake operating member 2 is tilted to the tilting end on the braking side, the locking edges 12 and 13 of the lock member come into contact with the gripping surfaces 8 and 9 of the receiving member 7 and the temporary holding member 7 is held. In the locked state, the receiving member 7 moves backward in an arc. When the receiving member 7 is moved to the rear moving end, the movement of the receiving member 7 in the return direction is blocked by both locking hole edges 12 and 13, and the brake operating member 2 is tilted at the braking side. Is locked against the return direction.

In this state, when the hook member 10 is rocked rearward and upward by the pulling operation of the release member 17, both locking hole edges 12, 13 are separated from both gripping surfaces 8, 9, and the receiving hole is stopped. The member 7 is released from the gripping state by the two locking hole edges 12 and 13 and is unlocked, and the brake operating member 2 is unlocked and the elastic force of the return spring 5 causes the tilting end on the release side to be released. Return tilt.

In FIG. 3, the outer gripping surface 8 of the receiving member 7 and the first The contact point between the stop hole edge 1 and 2 is c, the contact point between the inner gripping surface 9 and the second locking hole edge 13 is d, and the opening edge face of the through hole 1 1 1 Let h be the edge of the locking hole, and let t be the depth dimension of the through hole 11 (the thickness of the base 10a of the lock member 10), and let the diagonal i be inclined by B to the reference plane. Assuming that the front projection length of the hole 1 1 is g,

e = (t 2 + (g + f) 2) 1/2

A =-t a n t / (g + f)

A + B = c os g / e

B = c os g / e + A

If g = 20 mm, f = 0.2 mm, = 3.2 mm, then e = 20.45 2 mm, A = 9.02 ° B = 3 ° 4'6 " According to the above-described embodiment, the number of parts of the lock mechanism for locking the brake operating member 2 of the parking brake device can be reduced, the structure can be simplified, and the cost of the lock mechanism can be reduced. .

Further, in the conventional lock mechanism, the lock position of the brake operating member is gradually changed due to the engagement between the ratchet and the claw portion of the holder, and play occurs in the engagement portion. Since the locking holes 12 and 13 contact the arc-shaped gripping surfaces 8 and 9 to grip the receiving member 7, the lock position of the brake operating member 2 is shifted steplessly to brake. The operation member 2 can be accurately locked at an arbitrary position, and a trouble caused by play of the joint can be eliminated. Furthermore, in the conventional lock mechanism, a mating sound is generated when the mating position between the ratchet and the claw portion of the holder is changed, but the mating sound can be eliminated with the lock mechanism.

Also, when the edges 12 and 13 of the locking holes are in contact with the gripping surfaces 8 and 9, if the relative position between the receiving member 7 and the locking member 10 is to be shifted, the receiving The non-return action is applied to the member 7 by the two locking hole edges 12 and 13 so that the two locking hole edges 12 and 13 strengthen the check force that prevents the receiving member 7 from moving. Accordingly, the movement of the brake operation member 2 in the return direction can be accurately prevented, and the locked state of the brake operation member 2 can be strengthened and stabilized.

Further, when the relative position between the receiving member 7 and the lock member 10 is shifted by the tilting operation of the brake operating member 2, the relative position between the two gripping surfaces 8, 9 and both the locking hole edges 12, 13 is determined. In the same manner, the stroke in which both locking hole edges 12 and 13 come into contact with and separate from both gripping surfaces 8 and 9 over the entire stroke of the brake operating member 2 should be the same over the entire stroke of the brake operating member 2. As a result, the switching operation between the locked state and the unlocked state can be simplified.

Furthermore, the size of the through hole 11 and the receiving member 7 can be reduced, and the amount of displacement of the locking member 10 to the locking position and the unlocking position can be reduced, so that the locking mechanism is compact. And the space occupied by the lock mechanism can be reduced.

Next, a second embodiment in which the present invention is applied to the manually operated parking device shown in FIGS. 9 to 11 will be described.

A sleeve 25 is rotatably fitted to a support shaft 3A that is installed through the bracket 1A fixed to the vehicle body and supported by the bracket 1A.

The sleeve 25 has a base end of a brake operating member (brake lever) 2 A that is tiltably supported by a support shaft 3 A and is tilted by being gripped by hand, and a base end of a brake wire 26. The tilting member 27 whose part is locked is fixed.

A receiving member 7A supported by a connecting pin 28 inserted into the lower end of the bracket 1A is tiltably connected to the front end of the bracket 1A. The receiving member 7A has an outer gripping surface 8A curved in a convex arc shape with the center of the tilt of the brake operating member 2A near the arc a, and an outer gripping surface arranged inside the outer gripping surface 8A. An inner gripping surface 9A which is concentric with the surface 8A and curved in a concave arc shape is formed in parallel.

The brake operating member 2A is connected to a hook member 10A which is supported by a support pin 29 so as to be able to swing obliquely upward and obliquely downward and urged obliquely upward by a spring 30. I have.

The protruding piece 32 protruding from the base end of the mouth member 10 A has a release member 17 equipped with a release spot that swings the lock member 1 OA diagonally downward. The base end of the release member 17 A Are combined.

The mouth member 10A has a through hole 11A through which the receiving member 7A is inserted, and the through hole 11A is provided with a lock member 10A and a release member 17A. Is released from the spring and swings obliquely upward due to the spring force of the spring 30, it circumscribes and inscribes the outer gripping surface 8A and the inner gripping surface 9A of the receiving member 7A and grips the receiving member 7A. In this state, the lock member 10 OA is prevented from moving in the return direction, and the relative position between the receiving member 7 and the lock member 10 A is prevented from shifting. When pressed by A and swings obliquely downward, it separates from the outer gripping surface 8A and inner gripping surface 9A of the receiving member 7A, releases the gripping state on the receiving member 7A, and moves the lock member 10A. The first locking hole edge 12A and the second locking hole edge 13A are formed to allow the relative position between the receiving member 7A and the lock member 10A to be shifted. The first locking hole edge 12 A is formed at the base end of the opening end face 11 aA on one side of the through hole 11 A among the hole edges of the through hole 11 A. The stop hole edge 13 A is formed on the distal end side of the opening end face 11 bA opposite to the through hole 11 A among the hole edges of the through hole 11 A. 1 3 A is through hole 1 1 A longitudinal It is located on the diagonal line i of the surface.

When the first locking hole edge 12A is in circumscribed contact with the outer gripping surface 8A of the receiving member 7A, the second locking hole edge 13A is outer gripped with the first locking hole edge 12A. The inner gripping surface 9A is inscribed at a position shifted from the line segment b connecting the contact point with the surface 8A and the tilt center a of the brake operating member 2A, and the movement of the lock member 1 OA and the brake operating member 2 The tilting of A is stopped by the check action of both locking hole edges 12 A and 13 A, and the hook member 10 A and the brake operating member 2 A are locked in the return direction.

Claims

The scope of the claims

1. A bracket that has an outer gripping surface curved in a convex arcuate surface and an inner gripping surface curved in a concave arcuate surface, and is fixed to the vehicle body, or a brake operation that is tiltably connected to this bracket. The brake includes: a receiving member coupled to the member; and a lock member having a through hole through which the receiving member is passed, the lock member being connected to the release member, and swinging by operation of the release member. It is installed so that the relative position between the receiving member and the hook member changes with the tilting operation of the operating member, and the through holes are circumscribed and inscribed in the outer gripping surface and the inner gripping surface. In this state, the receiving member is grasped to prevent the relative position between the receiving member and the lock member from shifting, and the receiving member is separated from the outer gripping surface and the inner gripping surface by operating the release member. Release parts Mouth click mechanism in the parking brakes device formed a Kakaritomeanaen and second Kakaritomeanaen.

2. Arrange the arc centers of the outer gripping surface and the inner gripping surface near the tilting center of the brake operating member, and set the first locking hole edge and the second locking hole edge in the vertical cross section of the through hole. The parking brake according to claim 1, which is arranged diagonally.

—Mouth mechanism in key device.