CN1299760A - Linkage braking apparatus - Google Patents

Abstract

An interlocking brake device, a single-part top piece 25 directly in contact with the rear end of the piston rod 31a is rotatably supported on the cylinder body 30 around an axis orthogonal to a plane (the plane includes the actuating axis of the piston 31). Therefore, the master cylinder connected to the hydraulic wheel brake can be actuated corresponding to the independent brake operating part and the linked brake operating part, and at the same time, the braking force can be applied when the linked brake operating part brakes. As well as the above-mentioned master cylinder and mechanical wheel brake, in such an interlocking brake device, a top member for pushing the piston of the master cylinder is formed with a small number of parts and a simple structure.

Description

Interlock brake device

The invention relates to an improvement of a linkage braking device. The linked braking device is: corresponding to the braking operation of the independent brake operating part and the linked brake operating part, the master cylinder connected to the hydraulic wheel brake can be activated, and at the same time, the linked brake operating part can brake. In operation, the brake operating force can be applied to the above-mentioned master cylinder and mechanical wheel brake.

In the prior art, this interlocking braking device is known such as Japanese Patent Application Laid-Open Publication No. 11-91673 and the like.

In the above-mentioned existing interlocking braking device, the top piece that rotates and moves corresponding to the braking operation of the independent and interlocking brake operating member is rotatably supported on the master cylinder body, and the top piece has The push pin pushes the master cylinder piston. That is, the top member is composed of a pair of rods disposed on both sides of the piston's actuation axis, and a push pin having an axis perpendicular to the actuation axis and connecting the two rods.

In such a conventional interlocking brake device, the top member is composed of a plurality of parts, and the structure of the top member is relatively complicated.

The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide an interlocking brake device comprising a top member that pushes a master cylinder piston with a small number of parts and a simple structure.

In order to achieve the above-mentioned purpose, the interlocking brake device described in Scheme 1 of the present invention has: a master cylinder, a piston that is slidably fitted to a cylinder body formed by making the front face of the hydraulic chamber connected to the hydraulic wheel brake, and a pushable cylinder. The top piece of the rear end of the piston rod that is arranged on the above-mentioned piston, the independent brake operating part and the linked brake operating part that can perform braking operations independently of each other, and the braking operation corresponding to the linked brake operating part The set distribution ratio is a load distribution device that distributes the operating force between the mechanical wheel brake side and the top piece side, avoiding the mutual interference between the independent brake operating member and the load distribution device, and distributing the above independent brake operating member and the above load. A connecting device that is connected to the above-mentioned top member; in such an interlocking brake device, it is characterized in that the above-mentioned top member, which is a single part that directly contacts the rear end of the above-mentioned piston rod, can surround and contain the above-mentioned piston. The orthogonal axis is rotatably supported by the cylinder.

According to this constitution, since the master cylinder piston rod is directly pushed by the jack as a single part, the number of parts can be reduced and the construction of the jack can be simplified.

The interlocking braking device described in the second aspect of the present invention is characterized in that, on the basis of the invention described in the above-mentioned aspect 1, the above-mentioned top member is formed into a flat plate along the above-mentioned one plane containing the piston actuation axis. , can form a compact top piece with a simple shape.

The interlocking brake device described in the third aspect of the present invention is characterized in that, on the basis of the composition of the invention described in the above-mentioned aspect 2 or 3, the auxiliary cylinder is integrally formed on the above-mentioned cylinder body; The cylinder and auxiliary cylinder are compactly assembled.

The interlocking brake device according to claim 4 of the present invention is characterized in that, in addition to the configuration of the inventions described in claims 1 to 3, the load distribution device is disposed on one side of the plane including the axis of motion of the piston. Device and above-mentioned connecting device; As according to this structure, because can concentrate on disposing the actuating part in the interlocking braking device constituent element, carry out the layout when interlocking braking device is installed on vehicle easily.

The interlocking braking device according to claim 5 of the present invention is characterized in that, in addition to the constitution of the invention described in claim 4, the sub-cylinder disposed on the other side of the plane including the piston actuation axis is integrated. Formed in the above-mentioned cylinder block; according to this structure, the auxiliary cylinder can be configured without being restricted by the layout of the actuating part of the components of the interlocking brake device, and the volume of the auxiliary cylinder can be set larger; moreover, the main cylinder , auxiliary cylinder, load distribution device and the above-mentioned connecting device can be configured compactly as a whole.

Fig. 1 is a side view of a two-wheeled motor vehicle; Fig. 2 is a diagram of the overall structure of the interlocking brake device; Fig. 3 is an enlarged side view of the main cylinder components; Fig. 4 is a view from the 4th direction of Fig. 3; Fig. 5 is a view from the 5th direction of Fig. 3 Views; Fig. 6 is a sectional view of 6-6 of Fig. 3; Fig. 7 is a sectional view of 7-7 of Fig. 6; Fig. 8 shows the actuation situation in the operating state of the independent brake operating member, (a) is a diagram corresponding to Fig. 3 , (b) is a figure corresponding to Fig. 7; Fig. 9 shows the actuation status of the interlocking brake operating member operating state, (a) is a figure corresponding to Fig. 3, (b) is a figure corresponding to Fig. 7 .

The implementation form of the present invention will be described below by means of an embodiment of the present invention shown in the accompanying drawings.

1 to 9 show an embodiment of the present invention. Fig. 1 is a side view of a two-wheeled motor vehicle; Fig. 2 is a diagram of the overall structure of the interlocking brake device; Fig. 3 is an enlarged side view of the main cylinder components; Fig. 4 is a 4-way view of Fig. 3; Fig. 5 is a 5-way view of Fig. 3 Views; Fig. 6 is a sectional view of 6-6 of Fig. 3; Fig. 7 is a sectional view of 7-7 of Fig. 6; Fig. 8 shows the action status of the operating state of the independent brake operating member, (a) is a diagram corresponding to Fig. 3 , (b) is a figure corresponding to FIG. 7; FIG. 9 shows the action status of the interlocking brake operating member in the operating state, (a) is a figure corresponding to FIG. 3, and (b) is a figure corresponding to FIG. 7.

First, in FIG. 1 , a vehicle body frame 11 of a scooter-type motorcycle is composed of a front frame 12 and a rear frame 13 connected to the rear of the front frame 12 . The front frame 12 integrally has a head tube portion 12a that steerably supports a steering column 14a of the front fork 14 (which pivotally supports the front wheel WF), a down tube portion 12b extending downward from the head tube portion 12a, And the bottom 12c extending rearward from the lower end of the lower pipe portion 12b; and the steering handle 15 is connected to the upper end of the steering column 14a.

The rear frame 13 extends from the rear of the bottom portion 12c and is formed inclined from the middle to the rear and upward. In the middle part of the rear frame 13, the rear wheel WR is supported and the driving power unit 16 is supported vertically. A storage box 18 for storing a helmet and the like is provided on the rear frame 13 , and a seat 19 also serving as a cover is arranged on the upper surface of the storage box 18 .

Referring to Fig. 2 together, on the steering handle 15, an independent brake lever 21, which is adjacent to the right handle 20R and can be braked, is supported as an independent operating member, and adjacent to the left handle 20L, which can The brake operation pivotally supports an interlocking brake lever 22 as an interlocking operation member.

On the other hand, disc brakes BF as hydraulic wheel brakes are installed on the front wheels WF; drum brakes BR as mechanical wheel brakes are installed on the rear wheels WR; It can be used as a disc brake BF alone; by performing a braking operation on the interlocking brake lever 22, the disc brake BF and the drum brake BR can be linked to move.

On the head pipe portion 12a of the front frame 12 of the vehicle body frame 11, a master cylinder unit 23 is mounted, from which the brake hydraulic pressure is supplied to the disc brake BF in accordance with the braking operation of the independent brake lever 21; During the braking operation of the interlocking brake lever 22 , hydraulic pressure is supplied from the master cylinder member 23 to the disc brake BF, and tractive force acts on the drum brake BR.

In FIGS. 3 to 7, the master cylinder part 23 is formed by the following components: a master cylinder 24 capable of outputting brake hydraulic pressure, a top member 25 acting on a pushing force to the master cylinder 24, an auxiliary cylinder 26, and a corresponding The load distribution lever 27 as a load distribution device that distributes the operating force to the drum brake BR side and the top piece 25 side according to the preset ratio of the braking operation of the interlocking brake lever 22 avoids the independent brake lever 21 and the top piece 25. The load distribution rod 27 creates a coupling means 28 that interferes with each other and connects the independent brake rod 21 and the load distribution rod 27 to the top piece 25 .

In the state where the master cylinder part 23 is mounted on the vehicle body frame 11, it extends up and down and closes the upper end to form a cylindrical cylinder body 30, so that the piston 31 facing the hydraulic chamber 32 at the front (that is, the upper surface) is slidably engaged with the cylinder. Body 30 becomes master cylinder 24. A hydraulic chamber 32 is formed between the closed upper end of the cylinder 30 and the upper surface of the piston 31 , and a return spring 33 for urging the piston 31 to the rear (ie, downward) side is accommodated in the hydraulic chamber 32 . Further, a stopper wheel 39 for limiting the retraction limit of the piston 31 is attached to the rear end (ie lower end) opening of the cylinder 30 .

One end of the hydraulic hose 34 leading to the hydraulic chamber 32 is connected to the upper end of the cylinder 30 through a drum joint 35, and the other end of the hydraulic hose is connected to the disc brake BF, that is, the hydraulic chamber 32 is connected to the disc brake BF on.

An annular recess 36 is provided on the outer surface of the piston 31 , and a pair of cup seals 37 , 38 are mounted on the outer surface of the piston 31 , sandwiching the annular recess 36 from both sides in the axial direction of the piston 31 . Moreover, the cup seal 37 disposed between the annular recess 36 and the hydraulic chamber 32 among the two cup seals 37 and 38 allows braking when the hydraulic pressure in the hydraulic chamber 32 is lower than the hydraulic pressure in the annular recess 36 . Fluid flows from the annular recess 36 into the hydraulic chamber 32 .

Also integrally formed on the cylinder body 30 is an auxiliary cylinder 26 which is formed by extending up and down while the main cylinder part 23 is mounted on the vehicle body frame 11 and closing its lower end; the upper end opening of the auxiliary cylinder 26 is closed by a cover member 40 .

In order to avoid the contact between the brake fluid in the auxiliary cylinder 26 and the outside air as much as possible, and to prevent the pressure change acting on the brake fluid with the change of its liquid volume, a diaphragm 41 is accommodated in the auxiliary cylinder 26; A flange portion 41 a at the upper end of the diaphragm 41 and a pressing plate 42 placed on the flange portion 41 a are sandwiched between the sub cylinder 26 and the cover member 40 . And the communication hole 43 that leads to diaphragm 41 is set in the central part of pushing plate 42; Open your mouth.

An observation window 45 is provided in the middle part of the auxiliary cylinder 26 in the up and down direction, and the observation window 45 is closed in a liquid-tight manner by a light-transmitting plate 46 made of glass or synthetic resin, through which the situation in the auxiliary cylinder 26 can be seen clearly. .

The lower part of the auxiliary cylinder 26 is provided with a supply hole 47 for supplying the brake fluid in the auxiliary cylinder 26 to the above-mentioned annular recess 36. It communicates with the release hole 48 of the auxiliary cylinder 26 .

A piston rod 31 a extending backward (ie downward) is integrally and coaxially connected to the piston 31 , and the rear end of the piston rod 31 a protrudes rearward (ie downward) from the cylinder body 30 .

The top piece 25 pushes against the rear end of the piston rod 31a because one end of the top piece 25 is rotatable by means of a fulcrum 49 having an axis orthogonal to the plane P containing the actuation axis of the piston 31. and the top piece 25 is also a part formed in a flat shape along the above-mentioned plane P, and the pushing part 25a directly contacting the rear end of the piston rod 31a is integrally formed on The middle part of the top piece 25.

The coupling device 28 is composed of a first coupling member 50, a second coupling member 51, and a torsion spring 52, and is disposed on the plane P side. Among them, the first connecting member 50 is formed by extending up and down; the second connecting member 51 extends up and down longer than the first connecting member 50, and is overlapped with the first connecting member 50; the torsion spring 52 is arranged on the cylinder body 30 and the second connecting member 51;

A first elongated hole 53 extending up and down is provided at the lower portion of the first connecting member 50 , and a connecting pin 54 provided at the other end of the top member 25 is inserted through the first elongated hole 53 . A second elongated hole 55 having the same width as the first elongated hole 53 is also extended up and down on the second connecting member 51 , and the above-mentioned connecting pin 54 is also inserted through the second elongated hole 55 . And in the middle part of connecting pin 54, be provided with enlarged diameter part 54a, so that the side edges of first and second elongated holes 53, 55 make its two ends step parts slide on the opposite surface of first and second connecting member. .

One end of the first input cable 58 is connected to the independent brake lever 21 , and the cylindrical connection terminal 59 provided on the other end of the first input cable 58 is mated and connected to the upper part of the first connecting member 50 . The first input cable 58 passes through the first cable support portion 30 b integrally formed on the cylinder body 30 , and the end portion of the guide tube 60 surrounding the first input cable 58 abuts and supports the first cable support portion 30 b.

The load distribution rod 27 is arranged to extend on the same side as the coupling device 28 with respect to the plane P including the operating axis of the piston 31 . That is, the load distribution rod 27 and the connecting device 28 are disposed on one side relative to the plane P including the actuation axis of the piston 31; and the auxiliary cylinder 26 is disposed on the other side relative to the above-mentioned plane P.

One end of the load distribution rod 27 is connected to the upper part of the second connection member 51 of the connection device 28 via a connection pin 61 .

One end of the second input cable 62 is connected to the interlocking brake lever 22 , and the cylindrical connection terminal 63 provided on the other end of the second input cable 62 is mated and connected to the middle part of the load distribution lever 27 . In addition, the second input cable 62 passes through the second cable support portion 30c integrally formed in the cylinder 30, and the end portion of the guide tube 64 surrounding the second input cable 62 is abutted and supported on the second cable support portion 30c.

On the other end of the load distribution rod 27, a cylindrical connection terminal 66 arranged at one end of the output cable 65 (the output cable 65 penetrates the third cable support portion 30d integrally formed in the cylinder body 30) is fitted and connected, and surrounds the output cable 65. The end part of the guide tube 67 of the cable 65 is contact-supported by the 3rd cable support part 30d. The other end of the output cable 65 is connected to the actuating rod 68 of the drum brake BR.

One end of the torsion spring 52 of the connecting device 28 is connected to the second connecting member 51 , and the other end is abutted and connected to the cylinder body 30 , which itself surrounds the pivot 49 . The second coupling member 51 is energized to move downward by the spring force generated by the torsion spring, and the load distribution rod 27 coupled to the second coupling member 51 is energized so that one end thereof is brought to a downward position. A stopper 69 that abuts against the bottom of one end of the load distribution rod 27 and restricts the downward movement of the second connecting member 51 and the downward movement of one end of the load distribution rod 27 is integrally protruded from the cylinder body 30 .

The first cable support part 30b of the guide tube 60 supporting the first input cable 58 has been extended to the top of the second connecting member 51, and the upper end of the second connecting member 51 abuts against the second cable supporting part 30b, which can limit The upward movement of the second coupling member 51 and the upward movement of one end of the load distribution rod 27 are performed.

When the braking operation of the independent brake lever 21 is performed by such a load distribution lever 27 and the connecting device 28, as shown in Figure 8 (a), (b), by the traction of the first input cable 58, the connecting device 28 The upper first connecting member 50 is pulled upward. The upward movement of the first connecting member is transmitted to the top piece 25 through the connecting pin 54 coupled to the lower edge of the first elongated hole 53: the top piece 25 pushes the piston rod 31a of the master cylinder 24 and surrounds the axis of the fulcrum 49 Turning, the brake hydraulic pressure generated in the hydraulic pressure chamber 32 of the master cylinder 24 acts on the disc brake BF. At this time, the connecting pin 54 only moves upward in the second elongated hole 55 of the second connecting member 51, and the second connecting member 51 does not move upward, nor does it move from the connecting device 28 to the load distribution rod 27 side. A brake operating force acts on the independent brake lever 21 .

9 (a) and (b) are described with reference to Fig. 9 (a) and (b) for the actuation status during the brake operation of the linkage brake lever 22. When the brake operation corresponding to the linkage brake lever 22, the second input cable 62 is pulled, the load When the middle portion of the distribution rod 27 was pulled upwards, at first, because the elastic force of the torsion spring 52 acted on one end side of the load distribution rod 27, the load distribution rod 27 was a fulcrum with the connecting pin 61 on its one end side, as shown in Fig. 9 (a ) to rotate like a double dot dash line. Thus, the output cable 65 is pulled, and the drum brake BR mounted on the rear wheel WR is braked prior to the disc brake BF of the front wheel WF, so that the actuation time of the disc brake BF of the front wheel WF is shorter than that of the rear wheel. WR's drum brake BR is later, and can effectively obtain a good braking feeling of a motorized two-wheeler.

By increasing the braking operating force of the interlocking brake lever 22, the force acting on the second connecting member 51 from the second input cable 62 through the load distribution lever 27 exceeds the set load of the torsion spring 52, as shown in Figure 9 (a ) shown by the solid line, the load distribution lever 27 is pulled up entirely, and the operating force acts on the second connecting member 51 and the output according to the distribution ratio of the distance between the connecting pin 61 and the connecting terminal 63 and the distance between the connecting terminals 63 and 66. Cable 65 on. Thus, the drum brake BR of the rear wheel WR continues to brake, and at the same time, the second connecting member 51 is pulled upwards, and the top member 25 surrounds the support through the connecting pin 54 coupled to the lower edge of the second elongated hole 55. The axis of the shaft 49 rotates and pushes the piston rod 31a, and the brake hydraulic pressure generated in the hydraulic chamber 32 acts on the disc brake BF. At this time, the connecting pin 54 only moves upward in the first elongated hole 53 of the first connecting member 50, and the first connecting member 50 does not move upward, nor does it affect the movement from the connecting device 28 to the independent brake lever. 21 side effects.

When the brake operation force of the interlocking brake lever 22 is further increased, the second connecting member 51 abuts against the first cable support portion 30b, and the upward movement of the second connecting member 51 is restricted, the load distribution lever 27 can The fulcrum of connecting pin 61 rotates again. Thereby, it is possible to further increase the braking force by the drum brake BR of the rear wheel WR, and at the same time, even in the case of an out-of-adjustment situation such as a hydraulic pressure loss of the disc brake BF of the front wheel WF, the braking force on the side of the rear wheel WR can be ensured. Braking force.

A detected portion 27a protruding downward is integrally provided at the middle portion of the load distribution rod 27, and a first brake switch 70 having a detection piece 70a contacting the detected portion 27a is supported on a first switch support provided on the cylinder 30. part 30e. And one end of the top member 25 is integrally provided with a detected portion 25b that is slightly L-shaped in side view, and the second brake switch 71 having a detection member 71a in contact with the detected portion 25b is supported on the cylinder body 30. on the second switch supporting part 30f.

The first brake switch 70 detects the upward movement of the brake operation load distribution lever 27 corresponding to the linked brake lever 22; When at least one of the brakes is operated, the top member 25 presses the piston rod 31a to rotate.

Secondly, if the effect of the present embodiment is to be described, since the single-part top piece 25 directly in contact with the rear end of the piston rod 31a of the master cylinder 24 can be perpendicular to the plane P (the plane P includes the actuating axis of the piston 31) The axis of the shaft is rotatably supported on the cylinder body 30, that is, the piston 31a of the master cylinder 24 is directly pushed by a single top piece 25, so that the number of parts can be reduced and the top piece 25 is simplified by using a plurality of parts to form the top piece. composition.

Since the top piece 25 is formed into a flat plate shape along the above-mentioned plane P, the shape of the top piece 25 can be simplified, and the structure of the top piece 25 can be made compact.

Since the auxiliary cylinder 26 is integrally formed on the cylinder body 30, the main cylinder 24 and the auxiliary cylinder 26 can be compactly formed together.

Since the load distribution rod 27 and the connecting device 28 are arranged on the side of the above-mentioned plane P, the actuating parts among the constituent elements of the interlocking brake device can be concentratedly arranged like this, and the layout is easy when the interlocking brake device is assembled on the vehicle.

Since the auxiliary cylinder 26 is arranged on the other side of the above-mentioned plane P, the auxiliary cylinder 26 can be configured without being restricted by the layout of the actuating part in the constituent elements of the interlocking braking device, and the volume of the auxiliary cylinder 26 can be set to bigger. Furthermore, the master cylinder 24, the sub cylinder 26, the load distribution rod 27, and the coupling device 28 can be arranged compactly as a whole.

The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the present invention described in the claims.

According to the invention described in the above-mentioned scheme 1, since the piston rod of the master cylinder can be directly pushed by the top piece of a single part, the number of parts can be reduced and the construction of the top piece can be simplified.

According to the invention described in claim 2 above, the top member can be configured compactly in a simple shape.

According to the invention described in the above-mentioned claim 3, the main cylinder and the auxiliary cylinder can be configured compactly and collectively.

According to the invention described in Claim 4 above, the actuating parts among the constituent elements of the interlocking brake device can be collectively arranged, so that the layout of the interlocking brake device when assembled on the vehicle is easy.

According to the method described in the above-mentioned scheme 5, because the auxiliary cylinder can be configured without being restricted by the layout of the actuating part in the constituent elements of the interlocking brake device, and the volume of the auxiliary cylinder can be set larger, so the master cylinder, The auxiliary cylinder, the load distributing device and the above-mentioned connecting device are arranged compactly as a whole.

Claims (5)

1. A linkage brake device, which has: a master cylinder ( 24), can push the top piece (25) that is connected to the rear end of the piston rod (31a) of the above-mentioned piston (31), the independent brake operating part (21) and the linkage brake operation that can perform brake operations independently of each other Part (22), corresponding to the brake operation of the interlocking brake operating part (22), is a load distribution device that distributes the operating force to the mechanical wheel brake (BR) side and the top part (25) side according to a predetermined distribution ratio. (27), avoiding the mutual interference between the independent brake operating member (21) and the load distribution device (27), and connecting the above-mentioned independent brake operation member (21) and the above-mentioned load distribution device (27) to the above-mentioned top member ( 25) on the connecting device (28); it is characterized in that the above-mentioned top piece (25) that can directly contact the rear end of the above-mentioned piston rod (31a) and is a single part can surround the working part that is orthogonal to the above-mentioned piston (31) The cylinder (30) is rotatably supported around the axis of a plane (P) of the moving axis. 2. The interlocking braking device according to claim 1, characterized in that said top member (25) is in the shape of a flat plate along said plane (P) including the actuation axis of the piston (31). 3. The linked braking device according to claim 1 or 2, characterized in that the auxiliary cylinder (26) is integrally formed on the cylinder body (30). 4. The interlocking braking device according to any one of claims 1 to 3, characterized in that, on one side of the plane (P) including the actuation axis of the piston (31), the load distribution The device (27) is connected with the above-mentioned connecting device (28). 5. According to the interlocking brake device described in claim 4, it is characterized in that the auxiliary cylinder (26) arranged on the other side of the above-mentioned one plane (P) including the actuating axis of the above-mentioned piston (31) is integrally Formed on the cylinder body (30).

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