JPS6015245A - Operation device of brake - Google Patents

Abstract

PURPOSE:To prevent the return of a pedal after prevention of reverse turning of a turner, by eliminating unsteadiness between the turner and the pedal by making the turner abut against a brake pedal and providing a spring turning the above turner in the same direction in proportion to positive turning of the pedal. CONSTITUTION:A brake pedal 2 and a turner 20 turning by interlocking with the pedal 2 are connected through a link 30 with each other. A spring 68 is provided between pins 32, 34 connecting the link 30 and both the pins 32, 34 are energized through the spring 68 in the direction approaching to each other. With this construction, gaps existing among holes of the pedal 2 and the turner 20 through which each of the pins 32, 34 penetrates and each of the pins 32, 34 are eliminated and unsteadiness is not generated between the pedal 2 and the turner 20. After reverse turning, therefore, of the turner 20 has been prevented by stepping on the pedal 2, the pedal 2 does not return at all.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake operating device, and more particularly to a brake operating device that can maintain braking force by holding the pedal in its depressed position even when the brake pedal is depressed and the foot is released. .

Brakes in automobiles have two functions: decelerating and stopping the automobile, and maintaining a stopped state. In general, deceleration and stopping are done with the service brake, and maintaining a stopped state is usually done with the service brake or parking brake, but when maintaining a stopped state for a relatively short time, etc., the brake is depressed to the depressed position. A brake operating device has now been provided that can hold the pedal in its position and maintain a stopped state even when no pedal force is applied.

One type of such a brake operating device is provided with a rotating body that can rotate around a second axis that is parallel to the first axis that is the center of rotation of the pedal, and the rotating body and the brake pedal are connected, for example, by a link and a pin. When the brake pedal is rotated forward in the direction in which the brake pedal is depressed, the rotary body is rotated in the forward direction, and reverse rotation of the rotary body is prevented by, for example, an electromagnetic clutch, so that the pedal is held in the depressed position. There is something that I tried to keep.

In such devices, a gap (backlash) is intentionally provided in the force transmission system between the rotating body and the brake pedal from a design perspective, or the gap becomes large due to wear etc. Therefore, even if the brake pedal is depressed to the depressed position and the reverse rotation of the rotating body is prevented by an electromagnetic clutch, etc., when the pedal force is released, the connection system between the pedal and the rotating body will break. In some cases, the pedal rotates in the opposite direction due to the backlash, reducing the desired braking force and making it impossible to obtain the necessary braking force.

In view of the above circumstances, the present invention provides a brake operating device that can prevent the pedal from returning even slightly after the back rotation of the rotating body is prevented by eliminating the backlash between the rotating body and the brake pedal. It was made with the purpose of providing.

In order to achieve this purpose, the device according to the present invention includes:
■A brake pedal that is supported so as to be able to rotate in the forward direction and in the opposite direction from the original position toward the depressed position around the first axis; Supported so that it can rotate in both the opposite direction and the same direction,
and a rotating body that comes into contact with the brake pedal directly or indirectly through another member from the side that can prevent reverse rotation of the pedal, and (1) an operating state that prevents reverse rotation of the rotating body and a non-operating state that does not prevent reverse rotation. a rotation prevention mechanism that can be switched between states;
(2) It includes a spring that maintains the state of contact between the rotating body and the brake pedal and rotates the rotating body in the same direction as the pedal rotates in the normal direction.

In the brake operating device configured in this manner, the brake pedal and the rotating body are maintained in a state of contact with each other directly or indirectly via another member by the spring,
No rattling occurs. Furthermore, even when the brake pedal is depressed to the depressed position, the rotating body rotates along with the pedal while maintaining its contact state. Therefore, if the rotation prevention mechanism is switched to the active state and the rotation body is prevented from rotating in the opposite direction, even if the depression force is released, the rotation body will immediately prevent the pedal from rotating in the opposite direction, and the pedal will not move as expected. It is held in position with high precision.

Hereinafter, two or three embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, 2 is a brake pedal, which is suspended via a first shaft 8 from a pedal bracket 6, which is a fixed member, at the end opposite to the end where the footrest 4 is provided. It is supported around the axis of the first shaft 8 so as to be rotatable forward and backward from the original position shown in FIG. 1 toward the depressed position. When the pedal 2 is depressed to the depressed position, the bushing rod 10 moves forward,
Braking fluid pressure is generated in a mask ring (not shown) via the brake booster 12, but when the pedal force is released, the brake is returned to its original position by the brake reaction force and the biasing force of the return spring 14.

A second bracket 16 is further fixed to the pedal bracket 6, and a rack gear 20 is attached to the second bracket 16 by a second shaft 18 parallel to the first shaft 8. It is supported so that it can rotate in the same direction as the rotation.

The rotational plane of this rack gear 20 is parallel to the rotational plane of the pedal 2, although it is at odds with the rotational plane, and its free end engages with a guide portion 22 provided on the second bracket 16 and rotates in the rotational direction. Movement in the right angle direction is restricted. An elongated hole 24 is formed in the middle of the rack gear 20, and rack teeth 26 are formed on one side edge of the elongated hole 24 along an arc centered on the axis of the second shaft 18. , this rack tooth 26 is engaged with a pinion 28 provided on the rotating portion of the second bracket 16. Furthermore, the free end of the rack gear 20 and the intermediate part of the pedal 2 are connected via a link 30 and a pin 32, 34.

As is clear from FIG. 2, a pinion shaft 36 is concentrically fixed to the pinion 28 by serration coupling, and a rotating cylinder 40 is provided on the outside of this shaft 36 via bearings 3B, 3B, and rotates. The tube 40 is connected to the second bracket 16
The yoke 42 is rotatably held via a bearing 44 in the center hole of a yoke 42 fixed to the yoke 42 . A clutch plate 46 is fitted to one end of the rotary cylinder 40 by spline connection so that it cannot rotate relative to the rotary cylinder 40 but can be slid a certain amount in the direction of its center line. The solenoid 50 is biased away from the solenoid 50 provided therein. The leaf spring 48 is held by a NAND 56 that is tightened to the pinion shaft 36 via a bearing 52 and a spacer 54, and is fixed to the clutch plate 46 at its outer peripheral portion. When the solenoid 50 of the electromagnetic clutch 58 is excited by an electric signal from a vehicle speed detection device or the like, the clutch plate 46 is attracted to the end surface of the yoke 42 by the magnetic force against the urging force of the leaf spring 48, and the clutch plate 46 is in a state where it cannot rotate. Further, a rotary cylinder 40 to which this clutch plate 46 is fitted so as to be relatively unrotatable.
A known one-way clutch 60 is provided between the pinion shaft 36 and the pinion shaft 36 . This one way clutch 60
For example, a structure in which a plurality of cam surfaces are formed on the inner circumferential surface of the rotary cylinder 40 to gradually reduce the gap with the outer circumferential surface of the pinion shaft 36, and a clutch roller is disposed thereon in a state where it is biased in the biting direction. When the pinion 28 rotates in the normal direction as the brake pedal 2 and the rack gear 20 rotate in the normal direction, relative rotation between the pinion shaft 36 and the rotating cylinder 40 is allowed, but when the pinion rotates in the reverse direction, the relative rotation between the two is not allowed. , the rotary cylinder 40, the clutch plate 46, and the pinion shaft 36 are rotated together. Therefore, when the solenoid 50 of the electromagnetic clutch 58 is energized and the clutch plate 46 is rendered non-rotatable, the one-way clutch 60 also renders the pinion shaft 36 non-rotatable, causing the rack gear 20 that meshes with the pinion 2 to rotate in reverse. I! 11.1
You will receive 1 yu. That is, in this embodiment, pinion 2
8. The one-way clutch 60 and the electromagnetic clutch 58 constitute a rotation prevention mechanism that clearly prevents reverse rotation of the rack gear 2o.

If the reverse rotation of the rack gear 20 is prevented, the reverse rotation of the brake pedal 2, which is connected to the rank gear 20 by the link 30 and the pin 32.degree. 34, is also prevented. This link 3o is a pin 3 installed upright on the rack gear 20.
2 and the brake pedal 2 are fitted to the pin 34 erected in the part 62 through the fitting holes 64 and 66 provided at both ends of the link, and are prevented from being removed. Due to the connection between the rack gear 20 and the pedal 2 whose dynamic planes are parallel to each other, and due to manufacturing errors 2, the link fitting holes 64 and 66 and the pin 3 are
2.34, a relatively wide gap is provided between the two.

In the conventional operating device, the gap causes rattling, and when the pedal 2 is rotated forward toward the depressed position, the pin 34 on the pedal side as shown in FIG. There is a gap C1 between the link fitting hole 66 and the link fitting hole 66.
In addition, a gap C2 is created between the pin 32 of the rank gear example and the link fitting hole 64, and in this state, after the reverse rotation of the rack gear 20 is prevented by the rotation prevention mechanism, the depression force of the pedal 2 is 4, the pin 34 on the pedal side returns until it comes into contact with the inner peripheral surface of the hole on the opposite side within the range of the gap C1, and the link 30 is further pushed back within the range of the gap C2 to close the link fitting hole 64. Since the reverse rotation of the pedal 2 is prevented only when the inner peripheral surface on the opposite side comes into contact with the pin 32, the pedal 2 is prevented from returning from the intended position by the sum of the gaps C1 and 02. I didn't get it.

In contrast, in this embodiment, as shown in FIG. 5, a tension coil spring 68 is stretched between the pin 34 on the pedal side and the pin 32 on the rack gear side.
4 is biased in a direction that brings them closer together. Therefore, the zero tensile load of the spring 68 keeps the pins 32 and 34 in contact with the inner peripheral surfaces of the link fitting holes 64 and 66 on the sides closer to each other, as shown in FIG. is brought into contact with the side that prevents reverse rotation of the pedal 2.

The elastic force of the spring 68 overcomes the frictional force caused by the forward rotation of the rack gear 20 and the forward rotation of the pinion 28 when the pedal 2 is rotated forward toward the depressed position, causing the rack gear 20 to rotate forward. However, since forward rotation of the pinion 28 is always allowed by the one-way clutch 60 regardless of whether the clutch plate 46 is locked, the elastic force of the spring 68 is not so large. is also sufficient.

Therefore, in the brake operating device configured as described above, even when the brake pedal 2 is rotated forward from the original position toward the depressed position, the elastic force of the spring 68 allows the link engagement with the pins 32 and 34. hole 64,6
6 maintains the contact state as shown in FIG. 4, the rack 1 gear 20 is rotated in the normal direction, and the pinion 28 is rotated in the normal direction.

After the pedal 2 reaches the depressed position, when the vehicle speed drops below a predetermined speed near a stopped state, the solenoid 50 of the electromagnetic clutch 58 shown in FIG. 2 is energized based on an electrical signal from a speed detection device or the like. The yoke 42 attracts the clutch plate 46. In this state, the one-way clutch 60 allows the pinion 28 to rotate forward, but prevents it from rotating backwards, and through engagement with the rack teeth 26, reverse rotation of the rack gear 20 is also prevented. Therefore, even if the pressing force on the pedal 2 is released in this state, the reverse rotation of the pedal 2 is prevented via the pin 32° link 30 on the rack gear side and the pin 34 on the pedal side.
Braking force is maintained as is. Moreover, as shown in FIG. 4, the spring 68 maintains a contact state that can immediately prevent the pedal from rotating in the opposite direction. This is because the planned braking force is maintained without returning to the original position. Note that the return of the pedal 2 to its original position is performed by demagnetizing the solenoid 50 of the electromagnetic clutch 58, for example, by a switch activated by depression of the accelerator pedal. When the solenoid 50 is demagnetized, the clutch plate 46 becomes rotatable, and the rack gear 20 is allowed to rotate in the opposite direction, and is returned to its original position by the biasing force of the pedal 2 or the return spring 14.

In the above embodiment, the pin 32 on the rack gear side was provided closer to the original pedal position than the pin 34 on the pedal side, but as in the embodiment shown in FIG. It can also be provided at a position closer to the pedal depression direction than the pin 34 of the pedal 2. In such a case, as shown in Figures 7 and 8,
A compression spring 70 is disposed between the pins 32 and 34 with a predetermined preload to bias them in a direction that separates them. As a result, the pins 32 and 34 are brought into contact with the inner peripheral surfaces of the link fitting holes 64 and 66 on the sides far from each other, and the compression spring 70 is brought into contact without being deflected when the pedal 2 rotates in the normal direction. If the rack gear 20 is rotated in the forward direction while maintaining this state, and the reverse rotation of the rank gear 20 is prevented, a tensile force is immediately applied to the link 30 and the reverse rotation of the pedal 2 is prevented. Similar effects and effects can be obtained.

In addition to providing the pins 32 and 34 on the rack gear 20 and the pedal 2, respectively, for example, pins provided upright at both ends of the link 30 may be fitted into fitting holes formed on the rack gear 20 and the pedal 2, respectively. In that case, a tension spring or a compression spring would be disposed directly between the pedal 2 and the rack gear 20. □ Incidentally, in any of the embodiments, the link 30 is involved in preventing reverse rotation of the pedal 2, but is not involved in causing the rack gear 20 to rotate forward as the pedal 2 rotates forward. Not yet. Therefore, if a means for preventing reverse rotation of the pedal 2 is provided instead of the link 30, the link 3
For example, as shown in FIG. 9 or FIG. 10, the rack gear 20 is provided with a roller 72 that can come into contact with the pedal 2 from the side that prevents it from rotating in the opposite direction. 2
), and pedal 2 and rank gear 20
There is a tension spring 68 or a compression spring 7 between
0, the pedal 2 is moved through the roller 72.
It is also possible to maintain the state of contact between the rack gear 20 and the rack gear 20. Furthermore, it is also possible to directly bring the rank gear 20 into contact with the pedal 2 from the side that prevents reverse rotation of the pedal 2, without using the roller 72.

In addition, it is possible to replace the rank gear 20 with another rotating body, replace the rotation prevention mechanism that prevents reverse rotation of the rotating body with another known mechanism, etc. based on the knowledge of those skilled in the art. Various changes.

It goes without saying that the present invention can be carried out in a form with improvements, silk combinations, etc.

[Brief explanation of the drawing]

FIG. 1 is a front view of a brake operation device 5 which is an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line -■ in FIG. However, the spring is not shown in the diagram. FIGS. 3 and 4 are explanatory views showing the relationship between the gap between a link and a pin in a conventional brake operating device. FIG. 5 is an enlarged plan view showing a part of the apparatus shown in FIG. 1. FIG. 6 is a front view showing another embodiment of the present invention, and FIGS. 7 and 8 are an enlarged plan view and an enlarged front view showing a part of the apparatus shown in FIG. 6. 9 and 10 are simplified diagrams conceptually showing different embodiments of the present invention. 2 brake pedal 8: First shaft 18: Second shaft 20: Rank gear (rotating body) 26: Rasokku tooth 28: Pinion 30: Link 32.34: Pin 36; Pinion shaft 40: Rotating tube 58: Electromagnetic clutch 60; One-way clutch 64. 66: Link fitting hole 68: Tension spring 7o: Compression spring 6 Figure 1 [7th cause Kazuinu Wakasugi, Commissioner of the Japan Patent Office 1, Indication of the case 1982 Patent Application No. 121270 2, Invention Name of brake operating device 3, relationship with the case of the person making the amendment Patent applicant name (320) I-Yota Automobile Co., Ltd. 4, agent ■ 450 (ll Column 6 of the detailed description of the invention in the specification, amendment) Contents (1) Specification, page 3, line 18, “Decreases” is corrected to “may decrease.” (2) Page 3, line 19 [If the necessary braking force cannot be obtained] ” is deleted. Above 271-

Claims (1)

[Scope of Claims] (1, 1 A brake pedal supported so as to be rotatable in the forward direction and in the opposite direction from an original position toward a depressed position about a first axis; The brake pedal is rotatably supported around two axes in the same direction as the forward and reverse directions of the pedal, and comes into contact with the brake pedal directly or indirectly through another member from a side that can prevent reverse rotation of the pedal. a rotational body; a rotation prevention mechanism that can be switched between an activated state that prevents reverse rotation of the rotational body and a non-activated state that does not prevent the rotational body from reverse rotation; A brake operating device characterized in that it includes a spring that rotates the rotary body in the same direction as the brake pedal rotates in the forward direction. (2) Both ends of a link between the brake pedal and the rotary body are connected by pins. The brake operating device according to claim 1, wherein the brake operating device is loosely and rotatably connected, and the link and pin function as the other part key.