KR890008335Y1 - A master cylinder for a motor cycle - Google Patents

Abstract

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Description

Two-wheeled master cylinder

1 is a plan view of a partial cross section showing an embodiment of a master cylinder for a two-wheeled vehicle according to the present invention.

2 is a sectional view of principal parts of the master cylinder of the present invention.

3 is a partial cross-sectional plan view showing another embodiment of the master cylinder for two-wheeled vehicle according to the present invention.

FIG. 4 is a cross-sectional view showing the fixing state of the holder and the rearview mirror support portion in FIG.

5 is a plan view showing a conventional master cylinder for a two-wheeled vehicle.

* Explanation of symbols for main parts of the drawings

1 cylinder 1a semicircular recess

2: piston 3: storage tank

4: holder 4a: fastening piece

4b: fixing piece 4c: mounting hole

5: Lever bracket 5a: Mounting hole

6 brake lever 7 support shaft

8: discharge port 9: push rod

10: supply pot 10 ': relief pot

11 bolt 12 holder holder

22: rearview mirror attachment 23: reference nut

24, 25: nut 26: arm

27: mirror holder 27a: screw portion

H: handle 31: cylinder

33: storage tank 34: handle holder

36: brake lever 37: support shaft

H ₃ : Handle 38: Piston

39 holder holder

The present invention relates to a two-wheeled master cylinder, which can prevent output loss during brake operation, significantly reduce the cost of the master cylinder, and can reduce the time and effort of replacing the rearview mirror. It is an object to provide a master cylinder.

As shown in prior art, Japanese Unexamined Utility Model Publication Sho master cylinder for a two-wheeled vehicle that is disclosed in the No. 58-46932 is a plan view in FIG. 5, the handle (H ₃₎ in front, a handle (H ₃₎ cylinders (31 with respect to the ) Is arranged in parallel, and the cylinder 31 is formed between the handle holder 34 and the brake lever fixing part (supporting shaft 37 relation part), and therefore has the following drawbacks.

That is, since the distance l ₁ between the handle fixing portion (handle holder 34 relation portion) and the brake lever fixing portion (support shaft 37 relation portion) is far, the brake lever 36 is operated toward the handle H ₃ . Since the rotation moment is applied to the R ₁ direction of the lever 36 rotation about the holder fixing part 39 at the time, a rigidity must be secured to the holder 34 part. (34) and hatching b are to be formed thick, the width a of the holder 34 side to be large, and a rigid material must be used.

Therefore, there is a drawback that the weight becomes heavy and the cost is high in addition to the above necessity.

Moreover, since the cylinder 31 is formed between the handle holder 34 and the brake lever fixing part (support shaft 37 relation part) in front of the handle H ₃ , the brake lever 36 is R When rotating in _one direction, the entire body of the master cylinder 31 is biased in the R ₁ direction about the holder fixing part 39, so that the output loss of the piston 38 against the input of the brake lever 36 is lost. There was a flaw in this greatly.

The present invention is to solve the above problems, and in order to prevent the output loss during operation of the brake lever and to significantly reduce the cost of the master cylinder, by forming the cylinder at a right angle to the handle on the handle, as in the prior art The cylinder is not formed between the handle holder and the brake lever fixing part so that the distance between the brake lever and the handle can be narrowed, and the strength is sufficiently secured without forming a cylinder in front of the handle as in the prior art. Since the cylindrical portion is formed directly on the handle, it is not necessary to increase the thickness of the handle holder portion and the hatching b portion in FIG. 5, nor to increase the dimension of the holder width a, and to have a high rigidity material. In addition to the effect of not needing, such as weight reduction and cost can be achieved.

In addition, the present invention arranges and fixes the cylinder at right angles directly above the handle, thereby reducing the bias of the entire cylinder body in this operating direction when the brake lever is operated toward the handle, thereby reducing the loss of piston output to the input of the brake lever. It is to be reduced to the minimum.

A feature of the present invention is a master cylinder for a two-wheeled vehicle having a piston which is connected to a brake lever which is freely rotated on the handle side, and a cylinder which stores the piston and is connected to a storage tank and has a discharge port for oil. To form a holder to surround the lower portion of the handle to protect the cylinder, wherein the cylinder is formed so that the operating direction of the push rod moving the piston by pressing the piston relative to the extending direction of the handle from the top of the handle There is a point.

Hereinafter, the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the main cylinder 1 is formed with a discharge port 8 connected to the wheel brake cylinder to communicate with the wheel brake cylinder, and at the rear position of the discharge port 8; A pressure chamber is formed, and the pressure chamber is configured to be connected to and communicate with the storage tank 3 at an adjacent position through a supply port 10 and a relief 10 'formed on one side thereof.

In addition, the piston 2, which is elastically supported by a spring (not shown) and is always pushed in the non-operation direction, is housed in the rear of the pressure chamber.

On the rear end surface of the piston 2 arranged in the opening of the cylinder 1, the front end of the push rod 9 supported by the lock pin on the brake lever 6, which will be described later, is the piston 2 It is pressed so that it can be pushed out with respect to).

Further, at the bottom of the cylinder 1, a handle holder 4 for attaching the storage tank 3 at an adjacent position including the cylinder 1 to the handle H is provided with the bolt 11. It is formed so that it can be attached to the handle H and tightened by tightening.

Corresponding to the handle holder 4, a semicircular concave portion 1a is formed at the bottom of the cylinder 1.

In this case, the handle holder 4 and the concave inlet portion 1a of the bottom of the cylinder 1 form a form in which the handle H can be fitted when both sides face each other, and both sides with respect to the handle H. It is formed in the form arrange | positioned at a right angle.

Further, in FIG. 1, at one end of the storage tank 3 integrated with the cylinder 1, the lever bracket 5 protrudes in parallel toward the front from above and below.

The upper and lower lever brackets 5 penetrate through the support shaft holes, not shown in the vertical direction.

The supporting end of the brake lever 6 is inserted into the middle space of the upper and lower lever brackets 5, and the supporting end has a hole having the same diameter as the support shaft hole of the lever bracket 5. The part is penetrated.

The support shaft 7 is loosely fitted in the vertical direction to the support end hole and the support shaft hole of the lever bracket 5, and the brake lever 6 has the support shaft 7 as a supporting point, and the horizontal direction It is assembled to allow the rotation of.

Further, the supporting portion of the push rod 9 is connected to the surface portion of the supporting end of the brake lever 6 located close to the supporting shaft 7 so that the supporting portion of the push rod 9 can swing.

When the brake lever 6 is operated, the piston 2 is connected and driven by the extrusion force of the push rod 9 so as to be compressed so that the compression operation in the cylinder 1 is possible. It consists of a cylinder.

Referring to the operation of the present embodiment as described above is as follows.

When attaching the cylinder 2 to the steering wheel H of the two-wheeled vehicle, first, the aforementioned handle holder 4 is removed from the bottom of the cylinder 1, and as shown in the plan view of FIG. After placing the bottom recess 1a of the cylinder 1 on the upper surface of the handle H, the handle holder 4 once removed at the lower position of the handle H as described above is shown in FIG. By contacting the bottom of the cylinder (1) as shown in the figure, and tightening the bolt 11 into the screw hole formed in the main body side of the cylinder (1) from the position of the hole (not shown) at both ends thereof, Just above the handle H of the wheeled vehicle, the cylinder 1 can be easily attached and fixed in a state in which the cylinder 1 is disposed at a right angle with respect to the handle H.

As described above, since the cylinder 1 is attached to the handle H at a right angle with respect to the handle H, the master cylinder directly attached to the handle H is fixed to the handle H and the brake lever fixing part (support shaft ( 7) As the cylinder 1 is not formed between the related part), the support shaft 7 serving as the support point of the brake lever 6 is as close as possible to the handle H as compared to the master cylinder of the conventional example, That is, in FIG. 1, since the distance l ₂ is short, the bending moment during the operation of the brake lever 6 is significantly smaller than in the prior art, and the handle (using the cylinder 1) having sufficient strength is secured. Since the cylinder body is fixed directly above H), the thickness of the conventional handle holder portion and hatching b portion shown in FIG. 5 need not be thickened, and the size of the holder width a need not be large. Of course, use a material with high rigidity There is no need to effect such as light-weight, and achieve a cost of the jeoryeomhwa.

In this case, by the right angle arrangement of the cylinder 1, the lever fixing portion (support shaft 7 relation portion) and the handle fixing portion (handle holder 4 relation portion) and the cylinder portion (cylinder 1 relation portion) And the positional relationship between the handle fixing part (handle 4 relation part) can be made close.

In addition, according to the present invention, as the cylinder 1 is formed at right angles directly above the handle H, as shown in FIG. 1, the entire master cylinder body centered on the holder fixing part 12 is in the R ₂ direction. Since the bias is reduced, the output loss of the piston 2 to the input of the brake lever 6 can be reduced to a minimum.

Therefore, the push rod 9 pushes the piston 2 in the direction of applying pressure through the opening of the piston 2 by the brake operation of the lever 6 as described above, and thus the cylinder compressed by the pushing operation. By this function, the smooth brake operation can be performed.

In addition, in that case, since the said cylinder 1 is arrange | positioned orthogonal to the axial direction of the handle H, the pushing operation by the push rod 9 can be performed toward the axial center of the piston 2, The piston 2 which is operated by the pushing force of the push rod 9 can also be driven in a concentric manner with the push rod 9, thereby reducing the degree of damage and abrasion of the push rod 9. will be.

In addition, the present invention can be applied to a master cylinder for clutch control.

Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4 as follows.

In the present embodiment, the same reference numerals are given to members having the same functions as in the above embodiment.

In addition, description of the same components as the above embodiment will be omitted.

The holder 4 shown below is formed in the bottom part of the cylinder 1 in order to attach the storage tank 3 of the adjoining position containing this cylinder 1 to handle H. In FIG.

Prior to this, in forming the handle (H) of the cylinder (1), the piston (1) of the cylinder (1) with respect to the extension length of the handle (H) above the handle (H) As shown in FIG. 1, it is important to form the operation direction of the push rod 9 which is pushed in such a manner that it is positioned in a right angle direction.

When the holder 4 is matched with the semicircular recessed portion 1a formed at the bottom of the cylinder 1, a circular arc capable of sandwiching the handle H as shown in FIG. A fastening piece 4b having a shape fastening piece 4a and horizontally extending at both ends of the fastening piece 4a and having a bolt hole (not shown) for fastening integrally with the cylinder 1. It is.

One of the fixing pieces 4b extends upward and is laterally extended to form an arm piece 26. The fixing piece 4b is attached to the extension mounting surface to fit the base of the rearview mirror attachment column 22 described later. The hole 4c is penetrated.

In this way, the holder 4 is threaded into a bottom surface of the cylinder 1 by abutment surfaces of the fixing pieces 4b at both ends, and a bolt life not shown in the fixing pieces 4b. It is formed so that it may be attached to and pulled out by the handle H by tightening of the yult 11.

In addition, the concave inlet portion 1a formed in the bottom of the cylinder 1 and the fastening piece 4a of the holder 4 are formed so as to be disposed at right angles to the handle H while tightened and fastened in a circular shape. have.

At one end of the storage tank 3 integrally formed with the cylinder 1, the lever bracket 5 protrudes forward to face the arm piece 26. As shown in FIG.

The lever bracket 5 penetrates the attachment hole 5a which becomes concentric in the vertical direction with the attachment hole 4c of the holder 4 described above.

The supporting end of the brake lever 6 is fitted in the space between the lever bracket 5 and the fixing piece 4b immediately below.

The rear end of the support lever of the brake lever 6 is formed with a deep hole in the upper end, as shown by a dotted line in FIG. 4, and a rearview mirror attachment column 22 having a threaded portion in the lower end thereof. It fits in the attachment hole 4c of 4b), and is fixed to this fixing piece 4b by the fastening of the nut 24 in the lower outer side.

In this way, the brake lever 6 is abutted so that rotation of the horizontal direction is possible, using this rearview mirror attachment column 22 as a support point.

In addition, the reference nut 23 is welded and fixed to the upper surface of the attachment hole 5a of the lever bracket 5 in a concentric state, and in this position, the mirror column 27 which fixes the rearview mirror (not shown in the top), It can be attached and detached by screwing the screw portion 27a at the lower end and by double nut tightening of the nut 25 on the reference nut 23, so that replacement is possible freely.

In addition, the front end of the threaded portion 27a of the mirror support 27 has a depth of the end on the rearview mirror attachment support 22 (functioning as a rotation axis of the lever 6) as shown in FIG. It is inserted in a position positioned in the hole.

In FIG. 3, the base portion of the push rod 9 is swingably connected by inserting a pin to the surface portion of the support end side of the brake lever 6 close to the rearview mirror attachment column 22. have.

When the brake lever 6 is operated, the piston 2 is driven by the extrusion force of the push rod 9 so as to allow compression operation in the cylinder 1 so that the master cylinder as a whole can be pressed. Consists of.

Referring to the operation of the present embodiment as described above is as follows.

When attaching the cylinder 1 to the steering wheel H of the two-wheeled vehicle, the holder 4 is detached from the bottom position of the cylinder 1 once, and the bottom recessed portion of the cylinder 1 is removed. In the lower position of the handle H, the holder 4 once detached as described above is brought into contact with each other as shown in FIG. By screwing the bolt 11 with the screw hole formed in the main body side, the cylinder 1 is placed on the handle H of the two wheeled vehicle at a right angle with the handle H. It can be attached easily and reliably.

When attaching or detaching the holder 4, the rear mirror attaching support 22 fitted to the fixing piece 4b of the holder 4 is a mirror support attached to the lever bracket 5 side. Since it is separate from 27), it is not necessary to attach or remove the mirror support 27 at the time of attaching or detaching the arc holder 4. It can save double time and effort.

As described above, the master cylinder attached to the handle H has the rearview mirror attachment column 22 serving as a supporting point of the brake lever 6 because the cylinder 1 is disposed at right angles to the handle H. ) Is disposed in the state as close as possible to the handle H as compared with the conventional master cylinder.

Therefore, the lever 6 which performs the brake operation by using this attachment column 22 as a support point minimizes the bending moment at the time of the operation | movement, and can perform a brake operation smoothly and easily by this.

In this case, according to the right angle arrangement of the cylinder 1, the lever fixing portion (rear mirror attachment column 22 relational portion), the handle fixing portion (holder 4 relational portion) and the cylinder portion (cylinder 1 relational portion) And the positional relationship between the handle fixing portion and the relation between the rearview mirror attachment support 22 can be made closer.

In addition, since the push rod 9 pushes the piston 2 in the direction of applying pressure through the opening of the piston 2 by the brake operation of the lever 6 described above, the push rod 9 is extruded by the pushing operation. By the action of the cylinder, a smooth brake operation can be performed.

In addition, in this case, since the cylinder 1 is arranged in a state perpendicular to the axial direction of the handle H, the pushing operation by the push rod 9 can be performed toward the axial center of the piston 2. The piston 2, which is operated by the pushing force of the push rod 9, can also be connected and driven in the same axis state as the rod 9, thereby reducing the degree of damage and wear of the push rod 9. .

In addition, when replacing the rearview mirror, the nut 25, which is tightened on the upper surface of the lever bracket 5, is loosened once, and then rotated in the direction of releasing the mirror column 27 to be screwed into the reference nut 23. The screw portion 27a of the mirror support 27 can be loosened easily and quickly, and the mirror support 27 can be detached from the lever bracket 5.

In this case, the rearview mirror attachment column 22 immediately below is fitted between the cylinder 1 and the fixing piece 4b of the holder 4, so that the brake lever 6 is replaced at the time of replacing the rearview mirror. Since it is not necessary to take out, it is possible to reduce the labor and replacement time of the double, as in the case of attaching and detaching the cylinder 1 described above.

In addition, in this embodiment, the mirror column 27 is mounted to the lever bracket 5, and the rear view mirror attachment column 22 is mounted to the fixing piece 4b of the holder 4, respectively. Although not shown, the mounting hole 5a of the lever bracket 5 and the mounting hole 4c of the fixing piece 4b, which are not provided with the base nut 23 or the like, are not limited thereto. At the same time, a series of collars are fitted, and at the same time, the threaded portion 27a of the mirror pillar 27 is formed to have a long length so as to be inserted through the interior of the collar, thereby providing the mirror pillar 27. In the state that the large diameter portion of the supporting end of the abutment is in contact with the upper surface of the bracket (5), it is inserted through the inside of the collar, and the nut is screwed into the screw portion (27a) protruding to the lower outside of the fixing piece (4b) Even if the rearview mirror is replaced, the caller returns to its original state as the rotation axis of the brake lever 6. Since it can hold | maintain, it is possible to replace a rearview mirror, without removing a lever similarly to the said Example.

As described above, the present invention arranges the cylinder at right angles on the handle, and forms an arm piece for holding the pivot shaft of the lever in the holder of the cylinder. Therefore, when the brake lever is operated, the pressure deformation to the piston is minimized. As the loss of force is reduced, the brake operation is balanced, and the main parts can be made of resin or other material with low rigidity. This can not only significantly reduce the cost of the master cylinder, but also change the rearview mirror. As a result, the work can be performed under the original condition without removing the brake lever, which saves double time and effort, and can greatly enhance the function of this type of master cylinder.

In addition, since a cylinder portion having sufficient strength is formed directly above the handle without forming a cylinder in front of the handle as in the related art, it is not necessary to increase the thickness of the handle holder portion and the hatching b portion in FIG. Of course, it is not necessary to increase the dimension of the holder width a, and the effect of not having a material with high rigidity, etc. can be achieved, and the weight and cost can be reduced.

In addition, since the present invention arranges and fixes the cylinder at right angles directly on the handle, the bias of the entire cylinder body is reduced in this operating direction when the brake lever is operated toward the handle, thereby reducing the output loss of the piston to the pressure of the brake lever. It is to be reduced to the minimum.

Claims (1)

In the master cylinder for two-wheeled vehicle provided with the piston which drives to the brake lever installed so that rotation is free to the handle side, and the cylinder which accommodates this piston, is connected to a storage tank, and has a discharge port of oil, and handles (H) The holder (4) is formed to surround the lower side of the c) to hold the cylinder (1), and the cylinder (1) with respect to the extension length direction of the handle (H) above the handle (H). Master cylinder for a two-wheeled vehicle, characterized in that the pressing direction of the push rod (9) to move the operation direction is formed in a right direction.