JP2007230260A - Brake control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake control system for a light vehicle hardly causing the lowering of a braking force in rainy weather, restraining the generation of an uncomfortable sound in braking and capable of being manufactured at comparatively low cost. <P>SOLUTION: This brake control system has C letter shaped first, second and third rings 24, 25 and 26 capable of inserting a boss 6 inside inner side surfaces 73, 74 and 75 curved roughly circularly, braking force transmitting means 22, 23 to transmit braking forces to one end 36 of the first ring and a case 2 to store the first, second and third rings, the other end 38 of the first ring is connected to one end 42 of the second ring capable of revolving, the other end 43 of the second ring is connected to one end 69 of the third ring capable of revolving, the other end 71 of the third ring is mounted to the case capable of revolving and the braking force transmitting means is connected to the one end of the first ring so as to transmit the braking force in the other end direction from the one end of the first ring. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a braking device for a lightweight vehicle such as a bicycle (hereinafter sometimes referred to as “brake” or “braking device”).

Conventionally, a band brake is generally used as a brake for a rear wheel of a lightweight vehicle such as a bicycle. The band brake brakes by tightening the outer periphery of the boss attached to the axle with a band (brake shoe) (Patent Document 1).
In recent years, roller brakes are sometimes used mainly as brakes for sports bicycles and the like. The roller brake rotates the inner cam to push the outer rollers outward, and the pushed roller spreads the brake shoe that surrounds the outer roller and presses it against the drum to obtain braking force (Patent Document) 2, Non-Patent Document 1).
JP 55-159339 A JP-A-8-2471 Internet, http://cycle.shimano.co.jp/publish/content/cycle/sic/jp/ja/functions/rlb.html

However, the band brake has a problem that the band itself or the tightening surface of the band is formed of asbestos, resin, rubber, leather, or the like, so that the band brake is easily worn and the effect of the brake is poor in rainy weather. There is also a problem that unpleasant noise is generated during braking.
On the other hand, the roller brakes are less worn and less likely to cause a reduction in braking force during rainy weather. Moreover, generation of unpleasant sound during braking is also suppressed (Non-Patent Document 1). However, since the internal structure of the roller brake is complicated and the number of parts is large (see Patent Document 2, FIGS. 4 and 5), there is a problem that it is not easy to reduce the manufacturing cost.

  The present invention has been made in view of the above-described problems, and is a light vehicle that is less likely to cause a decrease in braking force during rainy weather, can suppress generation of unpleasant noise during braking, and can be produced at a relatively low cost. An object of the present invention is to provide a brake device for a vehicle.

In order to achieve the above object, the present invention takes the following technical means.
That is, the brake device according to the present invention is a brake device that restricts the rotation of a wheel of a light vehicle, and has an inner surface that bends in a substantially circular shape, and is a boss that is integrated with the wheel inside the inner surface. A C-shaped first ring that can be inserted, a C-shaped second ring that has an inner side surface that bends in a substantially circular shape and that can insert the boss inwardly of the inner side surface, and a substantially circular shape. A C-shaped third ring having an inner side surface that bends and capable of inserting the boss inside the inner side surface, braking force transmission means for transmitting a braking force to one end of the first ring, and A case for housing the first ring, the second ring, and the third ring, and the other end of the first ring is rotatably connected to one end of the second ring. , The other end of the second ring is pivotally connected to one end of the third ring, and the third ring The other end of the first ring is rotatably attached to the case, and the braking force transmitting means transmits one end of the first ring so as to transmit the braking force from one end of the first ring to the other end. It is connected to.

Preferably, the first ring and the second ring are arranged adjacent to each other, and the two third rings are sandwiched between both sides of the adjacent first ring and the second ring. It is arranged.
Preferably, the first ring, the second ring, and the third ring are formed of a plate material.

More preferably, the curvature of the inner surface of the first ring, the second ring, and the third ring and the cross-sectional shape of the portion forming the ring are substantially the same.
Another brake device according to the present invention is a brake device that restricts rotation of a wheel of a light vehicle, and has a substantially circular inner side surface that is integrated with the wheel inside the inner side surface. A C-shaped first ring into which the boss can be inserted, a C-shaped second ring having an inner surface bent in a substantially circular shape and capable of inserting the boss inside the inner surface, and the first Braking force transmitting means for transmitting a braking force to one end of the ring, and a case for housing the first ring and the second ring, and the other end of the first ring is the second ring. The other end of the second ring is pivotally connected to one end of the ring, and the other end of the second ring is pivotally attached to the case. The braking force transmitting means substantially applies the braking force from one end of the first ring. It is connected to one end of the first ring so as to transmit in the other end direction.

  The light vehicle here refers to a relatively light vehicle such as a bicycle, a wheelchair, or a senior car.

  According to the present invention, it is possible to provide a brake device for a light vehicle that is less likely to cause a reduction in braking force during rainy weather, can suppress generation of unpleasant noise during braking, and can be produced at a relatively low cost. .

1 is a view showing the structure of a brake device 1 according to the present invention formed for a bicycle, FIG. 2 is an assembly view of the brake device 1, FIG. 3 is an external view of the brake device 1, and FIG. 5 is a perspective view of the boss 6 and the heat radiating plate 7, FIG. 6 is a front view of the heat radiating plate 7, and FIG.
1 to 3, the brake device 1 includes a case 2, a braking unit 3, a plate cover 4, a crank cover 5, a boss 6, and a heat radiating plate 7.

  The case 2 accommodates the braking portion 3 and the like in a space formed in combination with the plate cover 4 and the crank cover 5. The case 2 includes a support portion 8 and a support screw 9 for supporting the braking portion 3, an axle hole 11 through which the bicycle axle 10 passes, a pull rod support portion 12, a band attachment portion 13, and the like. The case 2 includes a side wall 14 at a right angle from the end edge around the entire end edge, and a part of the side wall 14 extends inward at a substantially right angle to form a support portion 8. Referring to FIG. 2, the case 2 has a gap between the support portion 8 and a portion below the support portion 8. Lines connecting the centers of the support portion 8 and the portion below the support portion 8 are parallel to the axle 10. Support holes 15a and 15b are provided.

The head of the support screw 9 is fixedly integrated with the case 2 at a position away from the axle 10 with the axis parallel to the axle 10. The periphery of the axle hole 11 is a substantially circular recess 16 having a center in common with the axle hole 11. The concave portion 16 accommodates first to fourth plates 24 to 27 described later.
The pull rod support portion 12 is for stabilizing the operation of the pull rod 17 that transmits the braking force of a brake lever (not shown) attached to the handle of the bicycle to the brake portion 3. The pull rod support portion 12 includes a hollow bolt 18 having a through-hole provided in the shaft center, a nut 19, and a tapped hole (not shown) provided in the side wall 14 of the case 2.

A band 21 for fixing the brake device 1 to the bicycle frame 20 is attached to the band attaching portion 13. The band 21 is attached to the band attaching portion 13 with screws.
The braking unit 3 includes a crank 22, a joint 23, a first plate 24, a second plate 25, a third plate 26, a fourth plate 27, and the like. Hereinafter, the braking unit 3 will be described with reference to FIG.

The crank 22 is a metal plate having a substantially “L” shape, and a rotation hole 28 passes through a portion intersecting at a substantially right angle. A hole 30 for connecting the pulling rod 17 is provided in the vicinity of one long extending end 29a, and a first connection hole 31 passes through the other short extending end 29b. The pull rod 17 is connected to the crank 22 by a hole 30 and pull rod stops 32a and 32b.
The joint 23 is a metal plate having a substantially “8” shape with a second connection hole 33 and a third connection hole 34 penetrating therethrough. The joint 23 is connected to the crank 22 above the first rivet 35 so that the first rivet 35 is fitted in the second connecting hole 33 and the first connecting hole 31 so as to be rotatable and cannot be extracted.

  The first plate 24 is a ring-shaped (C-shaped) metal plate cut at one place, and one of the interrupted portions extends in a tangential direction, and a fourth connecting hole 37 penetrates in the vicinity of the end 36. is doing. The other side 38 of the first plate 24 has a slight width, the fifth connecting hole 39 penetrates in the vicinity of the end, and the insertion hole having a cross-sectional shape of an ellipse in the tangential direction from the fifth connecting hole 39. 40 penetrates. The first plate 24 is connected to the joint 23 below the second rivet 41 so that the second rivet 41 is fitted in the third connection hole 34 and the fourth connection hole 37 so that the second rivet 41 can rotate and cannot be removed.

  The second plate 25 is a ring-shaped (C-shaped) metal plate cut at one place, and both the interrupted ends 42 and 43 extend radially outward to the respective ends 42 and 43. The sixth connecting hole 44 and the seventh connecting hole 45 pass therethrough. The second plate 25 is connected to the lower side of the first plate 24 by the third rivet 46 being fitted in the fifth connecting hole 39 and the sixth connecting hole 44 so that the third rivet 46 is rotatable and cannot be removed with the washer 47 interposed therebetween. .

  The third plate 26 and the fourth plate 27 are exactly the same, and are ring-shaped (C-shaped) metal plates that are cut at one place, and each broken end is radially outward. Each one extends longer than the other. An eighth connecting hole 48 and a tenth connecting hole 49 penetrate through one end that extends long, and a ninth connecting hole 50 and an eleventh connecting hole 51 penetrate near the other end, respectively.

  The third plate 26 is disposed below the second plate 25 and the fourth plate 27 is disposed above the first plate 24. The fourth rivet 52 includes the eleventh connection hole 51, the insertion hole 40, the seventh connection hole 45, and The ninth connecting hole 50 is fitted to the first plate 24 and the second plate 25 so as to be pivotable and not extractable. Further, the fourth rivet 52 can freely move in the insertion hole 40. In addition, washers 47 are interposed between the seventh connection hole 45 and the ninth connection hole 50 and between the eleventh connection hole 51 and the insertion hole 40.

As described above, the braking unit 3 is configured by a link mechanism having the first to fourth rivets 35, 41, 46, and 52 as slides.
A large number of small holes 53,..., 53 regularly arranged as shown in FIG. 1 are provided on the surfaces of the first to fourth plates 24-27.
Each of the washers 47,..., 47 is used to provide an appropriate interval to the overlapping of the first to fourth plates 24 to 27 so as to make the respective movements smooth.

The first to fourth plates 24 to 27 all have substantially the same curvature of the inner surface forming the ring and the cross-sectional shape of the portion forming the ring.
The first to fourth plates 24 to 27 are made of spring steel plates having a thickness of about 2.2 mm.
The plate cover 4 is for accommodating the first to fourth plates 24 to 27 and integrating them into the case 2. In FIG. 4, the plate cover 4 includes a side wall 54 at a right angle from the end edge except for a part around the end edge, and a boss hole 55 through which the boss 6 fixed to the axle 10 passes rotatably, and A rivet hole 57 is provided through which a fifth rivet 56 described later is pivotably passed. A felt (nonwoven fabric) 58 is affixed to the inner side of a portion of the side wall 54 of the plate cover 4 that is positioned below when the brake device 1 is attached to a bicycle.

The felt 58 attached to the inside of the side wall 54 prevents the later-described grease injected into the brake device 1 from leaking outside.
The crank cover 5 is for integrating the crank 22 with the case 2. The crank cover 5 is provided with a hole 59 through which the support screw 9 passes.
Now, the braking part 3 is accommodated in the case 2 such that the eighth connection hole 48 and the tenth connection hole 49 are located between the support hole 15a and the support hole 15b. Then, the plate cover 4 is put on the braking portion 3, and the fifth rivet 56 is formed in the order of the support hole 15b, the eighth connection hole 48, the tenth connection hole 49, the rivet hole 57 of the plate cover 4, and the support hole 15a. One end of the fifth rivet 56 is fixed to the support hole 15b, and the other end is prevented from coming off the support hole 15a. Grease containing molybdenum disulfide, which is a solid lubricant, is injected into a space formed by the case 2 and the plate cover 4 and accommodating the braking portion 3.

In addition, a large number of small holes 53,..., 53 regularly arranged on the surfaces of the first to fourth plates 24 to 27 hold appropriate grease on the surfaces of the first to fourth plates 24 to 27. The first to fourth plates 24 to 27 are provided for smooth operation.
The crank 22 is rotatably attached to the support screw 9 of the case 2 with the rotation hole 28 having the spring 68 in the middle, and the crank cover 5 is covered with the support screw 9 passing through the hole 59 from above. . A nut 60 is screwed onto the support screw 9 from above the crank cover 5, and the crank 22 is rotatably supported by the case 2.

Here, the spring 68 is attached so as to urge the crank 22 in a direction that prevents the braking operation by the braking unit 3. A torsion coil spring is used as the spring 68, one end is locked inside the side wall 14 of the case 2, and the other end is formed in a “U” shape and locked to the crank 22.
5 and 6, a ring-shaped fitting groove 61 is provided on one surface of the boss 6. Further, on the outer periphery of the boss 6, there is a grease reservoir 62 which is a thin spiral groove. The boss 6 is fixed to the axle 10 and is disposed inside a ring formed by the first to fourth plates 24 to 27 and is accommodated in a space formed by the case 2 and the plate cover 4.

The heat radiating plate 7 includes a donut-shaped heat radiating portion 63 and a ring-shaped fitting portion 64 that protrudes in one axial direction from a circular edge inside the heat radiating portion 63. The heat radiating portion 63 is provided with a number of lightening holes 65,..., 65 in the circumferential direction for weight reduction, and a number of convex fins 66,. It extends in the tangential direction while bending.
The boss 6 and the heat radiating plate 7 are integrated by fitting the fitting portion 64 into the fitting groove 61 and tightening the hexagon socket set screws 67 and 67 from the outside of the boss 6.

Both the boss 6 and the heat radiating plate 7 are made of metal.
As shown in FIG. 3, the brake device is attached to the bicycle frame 20 by a band 21.
Next, the operation of the brake device 1 will be described with reference to FIG.
When a brake lever (not shown) is operated, one end 29a of the crank 22 fixed to the pull rod 17 is pulled in the P1 direction, and the crank 22 rotates to move the other end 29b in the P2 direction.

  Since the crank 22 and the joint 23, and the joint 23 and the first plate 24 are rotatably connected, the end 36 of the first plate 24 moves in the direction P3, and accordingly, the end 36 on the other side 38 A force to move in the P4 direction is applied. That is, the joint 23 is coupled to the end 36 of the first plate 24 so as to transmit the braking force from the end 36 of the first plate 24 toward the other end 38.

Since the second plate 25 is rotatably connected to the first plate 24 by the third rivet 46, the ends 42 and 43 of the second plate 25 are caused by a force to move the end 38 of the first plate 24. Is applied with a force to move in substantially the same direction (P5 direction and P6 direction).
Due to the force to move the ends 42, 43 of the second plate 25, the end 69 of the third plate 26 and the end 70 of the fourth plate 27, which are pivotally connected to the second plate 25, respectively in the P7 direction. Force to move is added.

  Here, the other end 71 of the third plate 26 and the other end 72 of the fourth plate 27 are both rotatably attached to the case 2 by the fifth rivet 56, and the respective one ends 69, 70 are provided. Cannot move even if moves. The reaction force R1 from the fifth rivet 56 is applied to the third plate 26 and the fourth plate 27, and the ends 69 and 70 are pushed back in the direction opposite to the P7 direction. Therefore, the third plate 26 and the fourth plate 27 bend in the direction of narrowing the ring formed by each.

  The reaction force from the fifth rivet 56 generates a force in the direction opposite to the P6 direction at the end 43 of the second plate 25 connected to the third plate 26 and the fourth plate 27, and the second plate 25 forms. Bend in the direction to narrow the ring. Due to the reaction force from the fifth rivet 56, a force in the direction opposite to the P4 direction acts on the end 38 of the first plate 24 connected to the end 42 of the second plate 25, and the ring formed by the first plate 24. Bend in the direction of narrowing.

  As for the 1st-4th plates 24-27 bent in the direction which narrows a ring, each inner surface 73-76 touches the outer periphery of the boss | hub 6 strongly, and rotation of the boss | hub 6 is restrict | limited by the frictional force. The first to fourth plates 24 to 27 all have the same cross-sectional shape and ring diameter of the portion forming the ring, and the degree of bending during the braking operation is the same. Therefore, the first to fourth plates 24 to 27 can press the inner side surfaces 73 to 76 against the boss 6 with substantially equal strength, and can strongly brake the boss 6. Further, since the first to fourth plates 24 to 27 are connected to each other (the fourth connecting hole 37 to the tenth connecting hole 49) so as not to overlap each other, each of them moves differently. The entire outer periphery of 6 can be braked. For example, when the first to fourth plates 24 to 27 are bent, the rings do not become perfect circles and the distribution of the braking force is generated in the respective inner side surfaces 73 to 76. As a whole, the boss 6 can be braked with a uniform distribution of the braking force.

  In the brake device 1, the heat radiating plate 7 functions to radiate frictional heat generated when the inner side surfaces 73 to 76 of the first to fourth plates 24 to 27 press the outer peripheral surface of the boss 6 during braking. Further, the grease collected in the grease reservoir 62 provided on the outer periphery of the boss 6 allows the brake device 1 to stop the bicycle safely without causing unpleasant noise during braking and without suddenly braking the boss 6. it can.

Since the brake device 1 does not require high processing accuracy and does not use expensive materials, it can be manufactured at a relatively low cost. Since the first to fourth plates 24 to 27 are made of metal, they are used for a long time. Even the braking force can be maintained.
The number of plates constituting the braking unit 3 can be 2 or 3 or 5 or more.
FIG. 8 is a diagram illustrating a configuration of a braking unit 3B according to another embodiment.

  In FIG. 8, the parts denoted by the same reference numerals as those in FIGS. 2 and 7 are the same as the braking unit 3. The braking unit 3B is different from the braking unit 3 in that it does not have the third plate 26 provided in the braking unit 3. The operation of the braking unit 3B is the same as the operation of the braking unit 3 except that the third plate 26 does not contribute to braking. Also in the braking portion 3B, the first plate 24B, the second plate 25B, and the third plate 27B have the curvature of the inner surface that forms the ring and the cross-sectional shape of the portion that forms the ring in order to align the degree of bending of each. Preferably they are the same.

FIG. 9 is a diagram showing a configuration of a braking portion 3C according to another embodiment.
9, the part which attached | subjected the code | symbol same as FIG. 2 and FIG. 7 is the same as the brake part 3 in the brake device 1. FIG. The braking portion 3C is rotatably connected to a rivet 56C fixed to the case, in that the braking plate 3 does not have the third plate 26 and the fourth plate 27 provided in the braking portion 3, and one end 43C of the second plate 25C. It differs from the braking part 3 in that it is.

  In the braking portion 3C, when a brake lever (not shown) is operated, a reaction force R1C from the rivet 56C acts on one end 43C of the second plate 25C with respect to the force transmitted from the crank 26. The first plate 24C and the second plate 25C bend in the direction of narrowing the respective rings by using the third rivet 46 as a sliding joint by these forces, and the inner side surfaces 73C and 74C press the outer periphery of the boss 6 to thereby press the boss 6 Limit the rotation of

In the braking parts 3, 3 </ b> B, 3 </ b> C, any one of the first to fourth plates 24 to 27, 24 </ b> B, 25 </ b> B, 27 </ b> B, 24 </ b> C, 25 </ b> C is other than a plate material. You may form with such a metal material. The shape of the crank 22 is not limited to the above embodiment, and may be a rod-like crank 22D as shown in FIG. 10, for example.
In the above-described embodiment, each structure or overall structure of the brake device 1 and the case 2, the braking portions 3, 3 </ b> B, 3 </ b> C, the plate cover 4, the crank cover 5, the boss 6, and the heat sink 7 that constitute the brake device 1. The shape, dimensions, number, material, and the like can be appropriately changed in accordance with the spirit of the present invention.

  The present invention can be used for a braking device for a lightweight vehicle such as a bicycle.

It is a figure which shows the structure of the brake device based on this invention formed for bicycles. It is an assembly drawing of a brake device. It is a figure which shows the external appearance of a brake device. It is a front view of a plate cover. It is a perspective view of a boss | hub and a heat sink. It is a front view of a heat sink. It is a figure which shows operation | movement of a braking part. It is a figure which shows the structure of the braking part by other embodiment. It is a figure which shows the structure of the braking part by other embodiment. It is a figure which shows the crank by other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Brake device 2 Case 6 Boss 22, 22D Braking force transmission means (crank)
23 Braking force transmission means (joint)
24, 24B first ring (first plate)
24C first ring (first plate)
25, 25B Second ring (second plate)
25C second ring (second plate)
26, 27, 27B Third ring (third plate)
36 One end of first ring (end of first plate)
38 The other end of the first ring (the end of the first plate)
42 One end of second ring (end of second plate)
43 The other end of the second ring (the end of the second plate)
69 One end of the third ring (end of the third plate)
71 The other end of the third ring (the end of the third plate)
73, 73C The inner surface of the first ring (the inner surface of the first plate)
74, 74C Inner surface of second ring (inner surface of second plate)
75 Inner surface of third ring (inner surface of third plate)

Claims (5)

A brake device that regulates the rotation of wheels of a light vehicle,
A C-shaped first ring having an inner side surface that is bent in a substantially circular shape and capable of inserting a boss integrated with the wheel inside the inner side surface;
A C-shaped second ring having an inner surface bent in a substantially circular shape and capable of inserting the boss inside the inner surface;
A C-shaped third ring having an inner surface bent in a substantially circular shape and capable of inserting the boss inside the inner surface;
Braking force transmitting means for transmitting a braking force to one end of the first ring;
A case for housing the first ring, the second ring, and the third ring;
The other end of the first ring is pivotally connected to one end of the second ring;
The other end of the second ring is pivotally connected to one end of the third ring;
The other end of the third ring is rotatably attached to the case;
The braking force transmission means is
The brake device is connected to one end of the first ring so as to transmit the braking force from one end of the first ring toward the other end. The first ring and the second ring are arranged next to each other;
The brake device according to claim 1, wherein the two third rings are arranged so as to sandwich the first ring and the second ring that are adjacent to each other. The brake device according to claim 1 or 2, wherein the first ring, the second ring, and the third ring are formed of a plate material. The curvature of the inner surface of said 1st ring, said 2nd ring, and said 3rd ring and the cross-sectional shape of the part which forms a ring are substantially the same. The brake device described. A brake device that regulates the rotation of wheels of a light vehicle,
A C-shaped first ring having an inner side surface that is bent in a substantially circular shape and capable of inserting a boss integrated with the wheel inside the inner side surface;
A C-shaped second ring having an inner surface bent in a substantially circular shape and capable of inserting the boss inside the inner surface;
Braking force transmitting means for transmitting a braking force to one end of the first ring;
A case for accommodating the first ring and the second ring,
The other end of the first ring is pivotally connected to one end of the second ring;
The other end of the second ring is pivotally attached to the case;
The braking force transmission means is
The brake device is connected to one end of the first ring so as to transmit the braking force from one end of the first ring toward the other end.

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