WO2018230114A1 - ディスクブレーキ装置 - Google Patents
ディスクブレーキ装置 Download PDFInfo
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- WO2018230114A1 WO2018230114A1 PCT/JP2018/014633 JP2018014633W WO2018230114A1 WO 2018230114 A1 WO2018230114 A1 WO 2018230114A1 JP 2018014633 W JP2018014633 W JP 2018014633W WO 2018230114 A1 WO2018230114 A1 WO 2018230114A1
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- brake
- spindle
- disc
- lever
- levers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/2245—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/2255—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is pivoted
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
- F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/28—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged apart from the brake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
- F16D65/567—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting on a disc brake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
Definitions
- the present invention relates to a disc brake device used for a general work machine such as a hoisting machine.
- FIG. 1A and FIG. 1B are diagrams for explaining the operation of the disc brake device 1.
- 1A and 1B are enlarged views of a main part of the disc brake device 1.
- FIG. 1A shows the disc brake device 1 in a braking state
- FIG. 1B shows a disc in a state when braking is released.
- the brake device 1 is shown.
- the plane including the front, rear, left, and right directions is a horizontal plane, and the rotating shaft 100 of the brake disc 2 extends in the left-right direction.
- FIG. 1A and 1B show front views when the disc brake device 1 placed on a horizontal plane is viewed from the front-rear direction. Note that, in the drawings shown below, the same or similar parts may be denoted by the same reference numerals and redundant description may be omitted. In some drawings, unnecessary symbols may be omitted in the description.
- a pair of brake levers (3L, 3R) extending upward are opposed to each other on the left and right sides of the brake disk 2, and the left and right brake levers (3L, 3R) are respectively opposed to each other.
- Brake linings (5L, 5R) are attached via brake shoes 4 to the brake disc 2 side of the extension.
- the left and right brake levers (3L, 3R) have front and rear rotational shafts (31L, 31R) at the lower ends, and are linked via a link mechanism (not shown) connected to the upper ends. Swings left and right.
- the link mechanism is configured to be driven by a predetermined driving device.
- the disc brake device 1 swings in the direction in which the left and right brake levers (3L, 3R) approach each other, and the brake lining (5L, 5R) holds the brake disc 2 between them. And it will be in a closed state.
- the left and right brake levers (3L, 3R) swing in a direction away from each other, and between the brake disc 2 and the brake lining (5L, 5R).
- a gap (hereinafter, also referred to as a gap x) is generated in the open state.
- Patent Document 1 Japanese Patent Laid-Open No. 11-37186.
- Patent Document 1 describes a link mechanism in a disc brake device, and the basic configuration and structure of the link mechanism of the disc brake device according to the embodiment of the present invention are described in Patent Document 1. Is similar to Below, in order to contribute to an understanding of the present invention, the structure and configuration of the link mechanism in the disc brake device described in Patent Document 1 and the operation of these mechanisms will be described. For ease of explanation, the rotation center in any rotation mechanism or the structure, part, member, etc. for forming the rotation center in the rotation mechanism will be referred to as “rotation shaft” unless otherwise specified. And
- FIG. 2A and FIG. 2B are diagrams showing the overall configuration of the disc brake device 1, and are perspective views when the disc brake device 1 is viewed from different directions.
- the disc brake device 1 includes various devices and mechanisms including the brake lever (3L, 3R) attached via various brackets fixed at appropriate positions on the base plate 6.
- the two brake levers (3L, 3R) are composed of two identical plate-like members facing front and rear, and the two plate-like members are connected via bolts 32 extending in the front-rear direction. Yes.
- the lower end of each brake lever (3L, 3R) is attached via the separate rotating shaft (31L, 31R) provided in the common bracket 61.
- a link mechanism 10 that swings the left and right brake levers (3L, 3R) so as to approach and separate from each other is disposed on the upper end side of the brake lever (3L, 3R).
- the link mechanism 10 in the illustrated disc brake device 1 includes four plate-shaped levers (11a, 11b, 12a, 12b) having surfaces in the vertical and horizontal directions, and a rod-shaped coupling device 20 that extends obliquely in the horizontal direction. It is composed of The four plate-like levers (11a, 11b, 12a, 12b) are fixed to each other by bolts 13 penetrating in the front-rear direction and operate integrally. Further, the four levers (11a, 11b, 12a, 12b) have a pair of two bent levers 11 that are stretched over the left and right brake levers (3L, 3R) while facing each other in the front-rear direction. A pair of two short levers 12 which are shorter in the left-right direction than the vent lever 11 while facing in the front-rear direction are included.
- the short lever 12 is attached to the right brake lever 3R, and the left and right directions are defined. If the front and rear directions are defined so that the respective directions coincide with each other, the short lever 12 has a shape protruding downward with respect to the vent lever 11, and the right end side front of the pair of vent levers 11 is provided. Is attached. Accordingly, the four levers (11a, 11b, 12a, 12b) are formed so as to be L-shaped with the right end bent downward when viewed as an integral structure.
- the pair of two short levers 12 is disposed between the two front and rear plate-like lever members constituting the right brake lever 3R, and further, in the region below the vent lever 11, the right lever
- the brake lever 3R is pivotally supported by a rotary shaft 33 on the upper end side of the brake lever 3R.
- a rod-like connecting device 20 that constitutes a link mechanism together with the vent lever 11 and the short lever 12 extends obliquely upward to the left from between the two front and rear short levers (12a, 12b).
- crosspieces (21, 22) having rotational axes in the front-rear direction are attached to the front end surface and the rear end surface of the rectangular box-shaped block member, respectively.
- the cross piece (21, 22) shown in the figure has a shape in which a cylindrical shaft serving as a rotation shaft (23, 24) projects from both front and rear ends of a rectangular box-shaped housing, and the cross piece on the left end side.
- the rotation shaft 23 of 21 is rotatably inserted into shaft holes formed on the upper ends of the two front and rear plate-like members constituting the left brake lever 3L.
- the rotating shaft 24 is rotatably inserted into shaft holes formed in the front and rear two short levers (12a, 12b).
- the position of the rotation shaft 24 of the cross piece 22 on the right end side is below the rotation shaft 33 that pivotally supports the short lever 12 in the right brake lever 3R.
- the vertical position where the left end cross piece 21 of the coupling device 20 is pivotally supported in the left brake lever 3L and the vertical position where the short lever 12 is pivotally supported in the right brake lever 3R are the same.
- the left and right brake levers (3L, 3R) swing so as to approach or separate from each other by interlocking with the link mechanism 10 having the above-described configuration.
- the left end of the vent lever 11 is moved up and down by a predetermined power source, so that the left and right brake levers (3L, 3R) swing so as to be separated from and close to each other.
- the thruster 40 that raises the left end side of the vent lever 11, and closed when the thruster 40 is not operating.
- a spring mechanism 50 for maintaining the state.
- the thruster 40 is constituted by an electric actuator or the like, and is configured such that when the thruster 40 is operated, a rod 41 extending in the vertical direction is extended upward.
- the thruster 40 has a rotating shaft 42 extending in the front-rear direction at the lower end, and is rotatably attached to a bracket 62 provided on the left rear side on the base plate 6. Further, a slight swing in the left-right direction accompanying the operation of the link mechanism 10 is allowed.
- a head 43 disposed between two front and rear vent levers (11a, 11b) is formed at the upper end of the rod 41.
- the head 43 has a rotation shaft 44 in the front-rear direction and has a left end of the vent lever 11. It is pivotally supported on the side.
- an appropriate rotation mechanism such as the above-described cross piece can be used.
- the spring mechanism 50 includes a hollow rectangular tube-shaped case 51 having a cylindrical axis in the vertical direction, a spring having a spiral axis in the vertical direction and housed in the housing, and a link mechanism 10 that expands and contracts the spring described later. And a connection mechanism for transmitting to the network.
- a rectangular cylindrical case (hereinafter also referred to as a spring case 51) is attached to a bracket 63 provided at the lower end side on the rear side of the base plate 6 and in the vicinity of the center of the left and right. It is pivotally supported on the bracket 63 so as to be able to swing slightly in the left-right direction with the action.
- the vent lever 11 is always urged downward through a spring and a rod (not shown) housed in the spring case 51.
- FIG. 3 shows a front view of the disc brake device 1 as viewed from the front.
- the brake levers (3L, 3R) are generally swung so that the left and right brake levers (3L, 3R) are separated and close to each other by moving the left end side of the vent lever 11 upward and downward. .
- the left end of the vent lever 11 rises against the downward biasing force of the spring mechanism 50 (s1).
- the vent lever 11 and the short lever 12 are integrally rotated clockwise with the rotation shaft 33 of the short lever 12 pivotally supported by the right brake lever 3R as a fulcrum ( s2).
- the connecting device 20 since the right end of the connecting device 20 is pivotally supported at a position below the rotation shaft 33 of the short lever 12, the connecting device is pushed to the left as the vent lever 11 and the short lever 12 rotate. (S3). Since the left end of the coupling device 20 is pivotally supported by the upper end of the left brake lever 3L, the upper end of the left brake lever 3L is urged to the left (s4). As a result, the right lever 3R also receives a reaction force and swings to the right. That is, the brake levers (3L, 3R) are swung in directions away from each other (s5), and the disc brake device 1 is in the open state in which the braking state is released.
- the vent lever 11 connected to the upper end of the rod of the spring mechanism 50 moves downward as shown by the white arrow in the figure.
- Energized (s11) the rod 41 of the thruster 40 is lowered (s12), and the vent lever 11 and the short lever 12 are integrally rotated counterclockwise around the rotating shaft 33 of the short lever 12 (s13).
- the levers (11, 12) rotate, the right end of the coupling device 20 is pushed rightward (s14), and the upper end of the left brake lever 3L that pivotally supports the left end of the coupling device 20 is the right side. (S15).
- the left and right brake levers (3L, 3R) swing in directions close to each other (s16) and the brake lining (5L, 5R) attached to the brake lever (3L, 3R) via the brake shoe 4
- the brake disc 2 is pinched and the disc brake device 1 is closed.
- the distance between the left and right brake levers (3L, 3R) in the closed state is gradually shortened as the brake linings (5L, 5R) wear. Go. Therefore, the narrow angle ⁇ of the left and right brake levers (3L, 3R) in the closed state gradually decreases. That is, the left end of the vent lever 11 in the closed state gradually falls downward. And if wear progresses and the rod 41 of the thruster 40 descends to the bottom dead center, the angle ⁇ between the left and right brake levers (3L, 3R) cannot be reduced thereafter. For this reason, the frictional force when the rotating brake disc 2 is pinched by the brake lining (5L, 5R) decreases, and there is a possibility that the brake disc 2 cannot be reliably braked.
- the disc brake device described in Patent Document 1 also includes a mechanism for rotating the left and right brake levers symmetrically with respect to the brake disc.
- the length of the connecting device is shortened by the AWA and the angle between the left and right brake levers in the open state becomes narrower, the downward biasing force by the spring is changed to the left and right with respect to the link mechanism.
- the left and right brake levers are tilted toward the right brake lever as a whole.
- the AWA is a constant angle between the left and right brake levers in the open state and the closed state, and the left and right brake levers do not always swing symmetrically with respect to the brake disc.
- the brake lining is reduced by one. Since it is necessary to replace the brake lining with a pair of left and right, the frequency of replacement of the brake lining increases, and the maintenance cost increases.
- the disc brake device disclosed in Patent Document 1 is an automatic gap distribution device (hereinafter, referred to as “automatic gap distribution device”) for automatically adjusting the left and right brake levers so as to swing symmetrically with respect to the brake disc.
- ACD also called Automatic Wear Centering Device.
- the ACD is covered with a box-like cover 7 disposed below the right brake lever 3R in the disc brake device 1 shown in FIG.
- FIG. 4 is an enlarged perspective view of the lower right side of the disc brake device 1, and shows a state where the cover 7 covering the ACD is removed.
- the main body of the ACD 70 is a rack and pinion 71 installed on the lower end side of the right brake lever 3R, and an adjustment bolt 72 having a male screw formed around the vertical direction as an axis.
- a pinion gear 73 is attached to the upper end side of the.
- the male screw of the adjusting bolt 72 is screwed from above onto a block-like member (hereinafter also referred to as a stopper 74) that protrudes toward the right outer side at the lower end of the right brake lever 3R, and the lower end is below the stopper 74. Protruding.
- a pedestal 75 that receives the lower end of the adjustment bolt 72 is provided immediately below the stopper 74.
- the bracket 61 that pivotally supports the lower ends of the left and right brake levers (3L, 3R) also serves as the pedestal 75.
- the operating principle of the ACD 70 is that when the adjusting bolt 72 is rotated in the screwing direction, the lower end of the adjusting bolt 72 is brought into contact with the pedestal 75 in the open state, and the right brake lever 3R is swung to the right. To regulate. Then, the swing of the left brake lever (FIG. 2, reference numeral 3L) coupled to the right brake lever 3R via the link mechanism (FIG. 4, reference numeral 10) is also restricted, and the brake disc (FIG. 2, reference numeral) is restricted.
- the left and right brake levers (3L, 3R) are adjusted to be symmetrical with respect to 2).
- the pinion gear 73 is attached to the upper end side of the adjustment bolt 72 via a one-way clutch. If the adjustment bolt 72 is a right-hand thread, if the pinion gear 73 is rotated in the clockwise direction when viewed from above, the adjustment bolt 72 rotates in a direction to be screwed in via a one-way clutch. In the counterclockwise direction, the one-way clutch rotates idly, and the adjustment bolt 72 does not rotate and the length protruding from the stopper 74 to the lower end is maintained. On the other hand, the rack gear 76 that meshes with the pinion gear 73 is fixed to the base plate 6.
- the pinion gear 73 is engaged with the stopper 74 by meshing with the rack gear 76. If the pinion gear 73 is rotated in the fastening direction, that is, the direction in which the pinion gear 73 is screwed, the inclination of the brake lever (3L, 3R) is restored.
- FIG. 5A to 5D show an outline of the ACD operation.
- the pinion gear 73 has a relative positional relationship in the left-right direction with respect to the rack gear 76, as indicated by a thick line arrow in the closed state shown in FIG. 5A and the closed state shown in FIG. 5B. Changes.
- the relative displacement is within the backlash W. Accordingly, when there is no wear on the brake lining, the pinion gear 73 does not rotate and the adjustment bolt 72 does not rotate.
- the one-way clutch 77 rotates the adjusting bolt 72 in the same direction when it is clockwise when viewed from above.
- the lower end of the adjustment bolt 72 protrudes larger than the stopper, and the lower end of the adjustment bolt 72 comes into contact with the upper surface of the pedestal when the rightward swinging angle of the brake lever is smaller. That is, the right brake lever is prevented from excessively tilting to the right.
- the distance between the brake disc and the brake lining in the open state can be kept constant and symmetrical.
- the disk surface of the brake disk is not necessarily perpendicular to the rotational axis over the entire surface. Even if it is very slight, there are many cases where the surface of the brake disk has minute irregularities and undulations, and the angle between the rotating shaft and the surface of the brake disk is shifted from 90 °. The position of the disc surface of the brake disc with which the brake lining comes into contact changes every time the brake disc is closed.
- the inclination of the left and right brake levers is slightly displaced in the left-right direction depending on the rotational position of the brake disc in the closed state. If the displacement exceeds the backlash allowed in the ACD, there is a possibility that the ACD malfunctions and unnecessarily rotates in the direction in which the adjustment bolt is screwed. As a result, the left and right brake levers cannot be opened and closed symmetrically.
- the left and right brake levers in the closed state generally tilt to the left, and the right brake lining is reduced.
- the open state if the left and right brake levers are generally tilted to the left, the right brake lining may touch the disc surface of the brake disc, which is not necessarily a flat surface. If the brake lining touches the rotating brake disc, there is a possibility that the operation of the driving body to be braked rotating the brake disc becomes unstable.
- the present invention can make the difference in the narrow angle between the left and right brake levers constant between braking and released state even when the brake lining is worn, and the brake lever is
- An object of the present invention is to provide a disc brake device that can be maintained symmetrically.
- One aspect of the present invention for achieving the above object is to provide a disc brake device that brakes rotation of the brake disc by holding the brake disc between the left and right brake linings facing each other in the left-right direction. Because Left and right brake levers each having a rotating shaft extending in the front-rear direction at the lower end and each having the brake lining attached thereto, A link mechanism that swings the left and right brake levers close to and away from each other; A thruster that operates the link mechanism so that the left and right brake levers are separated from each other and the brake is released; and A spring mechanism that operates the link so that the left and right brake levers are close to each other and are braked when the thruster is not operating; An automatic wear adjustment device that adjusts the narrow angle of the left and right brake levers in the open state according to the wear state of the brake lining; In an open state, an automatic gap distribution device that uniformly adjusts the left and right distances between the brake disc and the left and right brake linings, and With The link mechanism is composed of a lever mechanism and
- the connecting device is rod-shaped, has a rotating shaft extending in the front-rear direction at the other left and right ends, is pivotally supported on the upper end side of the other left and right brake levers, and is on the way to the left and right ends. It has a rotating shaft extending back and forth, and is pivotally supported on one of the left and right ends of the lever mechanism,
- the thruster includes a rod that has an upper end attached to the other left and right ends of the lever mechanism via a rotation shaft and can be moved up and down in the vertical direction.
- the spring mechanism is attached to a predetermined position of the lever mechanism via a rotating shaft, and biases the lever mechanism so as to maintain the closed state by a restoring force of a spring.
- the connecting device includes a spindle having a rotation axis in a rod-like axial direction, and the overall length is shortened by rotating the spindle in a predetermined direction
- the automatic wear adjusting device includes a one-way clutch that rotates the spindle only in one direction, and the one-way clutch is moved according to a relative displacement of the left and right ends of the lever mechanism and the coupling device.
- Rotate The automatic gap distribution device includes an adjustment bolt that passes through the stopper in the vertical direction while being screwed into a stopper protruding outward in the left and right direction at the lower end side of the left and right brake lever, and a lower end of the adjustment bolt.
- the flexible shaft is a disc brake device that is a coiled flexible shaft.
- a disc brake device in which the flexible shaft is a universal joint type flexible shaft may be used.
- a disc brake device having a transmission gear interposed between the spindle and the flexible shaft may be used.
- a disc brake device may be provided that projects the adjustment bolt downward by a predetermined length with respect to the stopper when the spindle rotates by a predetermined angle. Further, it may be a disc brake device provided with a gear mechanism for converting the rotation shaft of the spindle into a rotation shaft extending downward.
- the disc brake device of the present invention even if the brake lining is worn, the difference in the narrow angle between the left and right brake levers during braking and when the braking is released can be made constant, and the brake lever It can be maintained to be symmetrical with respect to the brake disc. Other effects will be clarified in the following description.
- AWA automatic abrasion adjusting device
- the disc brake device if the inclination of the brake lever is adjusted by ACD, the adjustment state of the inclination is maintained unless the opening / closing angle of the brake lever is readjusted by AWA.
- ACD opening / closing angle of the brake lever
- the basic configuration of the disc brake device according to the embodiment of the present invention is the same as the disc brake device described in Patent Document 1 or Non-Patent Documents 1 and 2, and the configuration and structure of the AWA are also the same. Are substantially the same as those described in the literature. However, skillful use of the mechanism and operation of the AWA can reliably prevent malfunction of the ACD.
- FIG. 6 is a diagram illustrating a connecting device that operates as an AWA.
- the figure is a view of the rod-shaped connecting device 20 as viewed from the direction orthogonal to the axis, and corresponds to the direction of arrows aa in FIG. Further, a part of the coupling device 20 shown in the figure is shown in a cross section when cut along a plane including the shaft so that the structure can be easily understood. The cross section corresponds to the cross section taken along the line bb in FIG. 3, and the cross section is shown by hatching.
- the coupling device 20 includes a spindle 120 having a male screw 121 formed on a peripheral side surface on the front end side.
- the male screw 121 on the front end side of the spindle 120 is a sleeve (hereinafter also referred to as a thread sleeve 122) disposed on the front end side of the spindle 120.
- a thread sleeve 122 a sleeve disposed on the front end side of the spindle 120.
- the cross piece 21 protruding in the front-rear direction is attached to the thread sleeve 122, and the distal end side of the connecting device 20 is pivotally supported on the upper end of the left brake lever 3L via the cross piece 21.
- a hollow cylindrical sleeve (hereinafter also referred to as a protection sleeve 124) is connected to the proximal end side of the thread sleeve 122, and an intermediate portion in the longitudinal direction of the spindle 120 is supported by the protection sleeve 124. Has been.
- the spindle 120 extends from the distal end side inserted into the thread sleeve 122 through the hollow portion of the protect sleeve 124 obliquely downward to the right and reaches the proximal end.
- the spindle 120 is inserted into a sleeve (hereinafter also referred to as a thrust sleeve 125) different from the previous two sleeves (122, 124) on the way to the base end.
- a cross piece 22 similar to the cross piece 21 attached to the thread sleeve 122 is connected to the base end side of the thrust sleeve 125.
- the cross piece 22 is pivotally supported by the short lever 12.
- the spindle 120 is inserted into the cross piece 22 via the thrust sleeve 125 and protrudes further to the right from the base end side of the cross piece 22.
- a one-way clutch 130 is attached to the protruding portion so as to be coaxial with the rotating shaft 126 of the spindle 120.
- An engagement pin 131 made of a spring pin is attached to the one-way clutch 130 so as to protrude radially outward with respect to the rotation shaft 126.
- a color stop 140 that accommodates the engaging pin 131 in a loosely fitted state is attached to one 12b of the two short levers (12a, 12b) facing in front and rear.
- a color stop 140 is attached to the rear short lever 12b.
- the color stop 140 has a hollow cylindrical shape with the front-rear direction as an axis, and an end surface on the engagement pin 131 side is open. The distal end side of the engagement pin 131 is inserted into the hollow portion 141 of the collar stop 140 from the opening.
- the diameter of the engaging pin 131 is about 1/3 of the inner diameter of the hollow portion 141 of the collar stop 140.
- the spindle 120 when viewed from the proximal end toward the distal end, when the one-way clutch 130 rotates in the clockwise direction, the spindle 120 also rotates in the same direction. When rotating in the counterclockwise direction, the one-way clutch 130 idles with respect to the spindle 120 and the spindle 120 is not rotated around the shaft 126.
- FIGS. 7A to 7D show the principle of operation of the AWA.
- 7A to 7D schematically show a state when the connecting device 20 and the short lever 12 are viewed from the right side.
- FIG. 7A to FIG. 7D show the operating states of different AWAs.
- the operations of the AWA will be described with reference to FIGS. 7A to 7D and FIGS. 3 and 6 described above.
- the short lever 12 is pivotally supported by the rotation shaft (FIG. 3, reference numeral 33) on the upper end side of the right brake lever (FIG. 3, reference numeral 3R), and the vent lever (FIG. 3, reference numeral 11). As a unit, it swings around the rotation shaft 33.
- the color stop 140 is attached to the short lever 12, and when viewed from the front, the color stop 140 draws an arc-shaped trajectory centering on the rotating shaft 33 as the short lever 12 swings. That is, when viewed from the right, the color stop 140 reciprocates in the vertical direction.
- FIGS. 7A and 7B First, the case where there is no wear on the brake lining (FIG. 3, reference numerals 5L and 5R) will be described as shown in FIGS. 7A and 7B.
- the engagement pin 131 is attached to the one-way clutch 130 and moves relatively up and down within the hollow portion 141 of the collar stop 140, but the inner surface of the hollow portion 141.
- the one-way clutch 130 does not rotate via the engagement pin 131 without contact.
- the disc brake device 1 in the closed state has a vent lever 11 compared to when the brake lining (5L, 5R) is not worn. Accordingly, the short lever 12 rotates counterclockwise at a larger rotation angle than when the brake lining (5L, 5R) is not worn when viewed from the front. That is, as shown in FIG. 7C, the collar stop 140 moves relatively higher with respect to the engagement pin 131. As a result, the engagement pin 131 is pushed up by contacting the lower side of the inner surface of the collar stop 140. At this time, the one-way clutch 130 rotates counterclockwise when viewed from the base end side, but rotates idly with respect to the spindle 120, and the spindle 120 does not rotate.
- the engaging pin 131 contacts the upper side of the inner surface of the collar stop 140 and is pushed downward, and the one-way clutch 130 is rotated clockwise as viewed from the base end side. Rotate. Thereby, the spindle 120 is screwed into the thread sleeve (reference numeral 122 in FIG. 6). As a result, the distance between the rotation axes (23-24) of the respective cross pieces (21, 22) on the distal end side and the proximal end side in the coupling device 20 (hereinafter also referred to as the total length D) is shortened.
- the narrow angle ⁇ of the left and right brake levers (3L, 3R) shown in FIG. 3 is narrowed in the open state, and the gap between the brake disc 2 and the brake lining (5L, 5R). Decrease. Thereby, the braking force applied to the brake disc 2 in the closed state is maintained in the same manner as before the brake linings (5L, 5R) are worn.
- the principle for adjusting the gap itself is the same as that of the conventional ACD. That is, by adjusting the length of the adjustment bolt protruding below the stopper by rotating the adjustment bolt, the left and right brake levers are adjusted so as to swing symmetrically with respect to the brake disc.
- the mechanism for rotating the adjusting bolt in the ACD is not a rack and pinion but a mechanism that is directly linked to the rotating operation of the spindle in the AWA.
- FIG. 8 shows a disc brake device 1a according to an embodiment of the present invention.
- the disc brake device 1 a transmits the rotating operation of the spindle 120 that rotates about the extending direction of the connecting device 20 as the shaft 126 to the adjusting bolt 72 via the flexible shaft 150.
- the flexible shaft 150 is an axis that can transmit rotation while freely changing the direction.
- a flexible shaft called a “coil-shaped flexible shaft” or “flexible shaft” (hereinafter also referred to as a flexible shaft 150) is used.
- the flexible shaft 150 has, for example, a structure in which a thin wire and a thick wire are sequentially wound in a reverse winding in a coil shape from the inner side toward the surface layer side.
- a gear box 160 incorporating a bevel gear is connected to the base end of the spindle 120, one end of the flexible shaft 150 is connected to the output shaft 161 of the gear box 160, and the other end is the adjustment bolt 72.
- the bevel gear in the gear box 160 is a reduction gear, and the output shaft 161 is rotated so that the rotation angle is a predetermined ratio with respect to the rotation angle input from the spindle 120, and the adjustment bolt is adjusted by the rotation angle. 72 is rotated.
- the flexible shaft 150 rotates the adjustment bolt 72 counterclockwise when viewed from above. Therefore, in this embodiment, the male screw of the adjusting bolt 72 and the female screw of the stopper 74 are left-handed screws.
- the flexible shaft 150 is mainly used, the reduction ratio by the gear box 160, the pitch of the male screw formed on the outer periphery of the spindle 120, the pitch of the adjusting bolt 72, and the adjustment with the spindle 120.
- the ACD function is realized by the screw direction of the bolt 72 (right screw, left screw) or the like.
- the flexible shaft 15 directly transmits the rotational movement of the spindle 120 accompanying the operation of the AWA to the adjustment bolt 72 to rotate the adjustment bolt 72. Since the spindle 120 rotates only in one direction by the above-described operation of the AWA, the adjustment bolt 72 does not rotate in the direction to return the screw.
- the adjustment bolt 72 does not rotate unless the spindle 120 rotates in a direction that shortens the total length D of the coupling device 20. Therefore, the ACD does not malfunction even if the surface of the brake disk 2 has waviness or unevenness.
- the timing at which the ACD operates is the timing at which the AWA operates to become a closed state.
- the right brake lever 3R fixing the stopper 74 is swung to the left, and the lower end of the adjustment bolt 72 screwed to the stopper 74 is floating or attached to the pedestal 75. It is in a state where it is not strongly pressed. That is, the adjustment bolt 72 can be easily rotated. Therefore, the adjustment bolt 72 rotates reliably and with high accuracy by the rotational torque of the flexible shaft 150. As a result, the gap is automatically adjusted with extremely high accuracy and the state is maintained.
- the length of the coupling device 20 is shortened according to the reduction ratio in the gear box 160 and the wear state of the brake linings (5L, 5R), and the left and right brake levers in the closed state and the open state according to the length.
- the included angle ⁇ of (3L, 3R), the pitch of the male screw formed on the outer periphery of the spindle 120, and the pitch of the adjusting bolt 72 can be appropriately changed.
- FIG. 9 is an explanatory diagram relating to dimensions and angles of each part in the disc brake device 1a.
- FIG. 9 is a front view of the disc brake device 1a according to the present embodiment as viewed from the front. In the drawing, the dimensions of each part are indicated by various symbols.
- the vertical distance from the rotation axis (31L, 31R) of the brake lever (3L, 3R) to the vertical center position of the brake lining (5L, 5R) is A, and the vertical distance of the brake lining (5L, 5R)
- the distance from the center position to the vertical position where the cross piece 21 on the distal end side of the coupling device 20 is pivotally supported by the left brake lever 3L is B, and the adjustment bolt 72 is rotated from the rotation shaft 31R of the right brake lever 3R.
- the distance in the left-right direction to the lower end is C.
- the inclination angle of the coupling device 20 with respect to the horizontal direction parallel to the horizontal plane is ⁇
- the pitch of the spindle 120 is P1
- the pitch of the adjustment bolts 72 is P2.
- the above-described AWA adjusts the total length D of the coupling device 20 so as to keep the inclination angle ⁇ constant according to the wear of the brake linings (5L, 5R).
- the rotation angle which is the difference between the dimensions and angles (A, B, C, ⁇ , P1, P2) of each part in the disc brake device 1 shown in FIGS.
- the dimensions, angles, pitches, reduction ratios, and the like of the above portions are appropriately set, and the left and right directions in each of the brake linings (5L, 5R).
- the distance between the brake pads (5L, 5R) and the brake disk 2 in the open state can be reduced by the worn thickness.
- the direction of the rotation axis of the spindle is changed to the vertical vertical direction by using the bevel gear.
- the flexible shaft is directly attached to the rotation axis of the spindle.
- the shaft may be bent downward in the direction of the rotation axis and connected to the adjustment bolt.
- a non-flexible shaft such as a metal shaft can be attached to the output shaft and adjustment bolt of the gear box, and the flexible shaft can be connected to the tip of the shaft.
- the relative positional relationship of each part may change with the opening / closing operation of the disc brake device.
- the adjusting bolt can be rotated by rotating the spindle.
- the flexible shaft is not limited to a flexible shaft, and may be a universal joint type flexible shaft in which short rigid shafts are connected by a universal joint (also referred to as a universal joint).
- a flexible shaft in which a flexible shaft and a universal joint type flexible shaft are mixed may be used.
- an appropriate flexible shaft can be adopted according to the installation environment of the disc brake device, the manufacturing cost, the durability required for the flexible shaft, and the like.
- gear mechanism for converting the spindle rotation shaft into a rotation shaft extending downward, various bevel gears (immediately bevel gears, spiral bevel gears, zero roll bevel gears, etc.), face gears, high void gears, etc.
- a gear mechanism can be employed.
- one gear mechanism may be a combination of a plurality of different gear mechanisms.
- the adjustment bolt since the pitch of the adjustment bolt used is too large, when the adjustment bolt and the spindle rotate by the same rotation angle, the adjustment bolt protrudes excessively downward with respect to the stopper. Therefore, the difference in the rotation angle between the spindle and the adjustment bolt is adjusted by the reduction ratio of the gear in the gear box so that when the spindle rotates by a predetermined angle, the adjustment bolt protrudes by a predetermined length with respect to the stopper. It was.
- the gear ratio in the gearbox is constant, if the ratio between the pitch of the spindle and the pitch of the adjusting bolt is set appropriately, the spindle can be rotated by a predetermined rotation angle.
- the adjustment bolt can be protruded downward with respect to the stopper by a desired length.
- the gear ratio by the gearbox is 1 ⁇ 2
- the gear ratio may be set to 1 and the pitch of the adjustment bolts may be halved.
- a multi-threaded screw may be adopted for the spindle and the control bolt.
- the pitch of one of the spindle and the adjusting bolt may become excessive.
- the pitch becomes excessive the dimensions of the external threads of the spindle and the adjusting bolt and the thread of the internal thread that is the counterpart of these external threads become large. If the thread becomes large, it becomes difficult to process the screw with high accuracy. Furthermore, in order to form a large thread, it is necessary to cut a large volume, which increases the time and cost required for processing.
- the spindle is also a part of the link mechanism and needs to ensure sufficient strength.
- the thread sleeve female thread that is the counterpart of the male thread of the spindle is also thin if the outer diameter is the same. Therefore, in particular, it is difficult to adopt a single-thread screw having a large pitch, which is feared of insufficient strength, for the male screw of the spindle and the female screw of the thread sleeve. Therefore, if these screws are multi-threaded, the pitch can be reduced while maintaining the leads, and the processing accuracy and strength can be ensured.
- the number of threads of the multi-thread can be appropriately set according to the ratio between the lead of the spindle and the lead of the adjusting bolt or the processing accuracy.
- the disc brake device only needs to have a configuration in which when the spindle rotates by a predetermined rotation angle, the adjustment bolt is screwed through the flexible shaft and proceeds downward by a predetermined length.
- the spindle is a right-hand thread and the adjustment bolt is a left-hand thread, so that when the spindle rotates in the direction of shortening the connecting device, the adjustment bolt rotates in the direction to be screwed into the stopper.
- the lower end side protruded further downward with respect to the stopper.
- a general right-hand thread can be used for the adjustment bolt.
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Abstract
Description
本出願は平成29年6月16日付けで出願した特願2017-118666、および平成29年10月10日付けで出願した特願2017-1197147に基づく優先権を主張し、その開示全体を本出願に援用するものである。
それぞれが下端に前後方向に延長する回転軸を有して立設されているとともに、それぞれに前記ブレーキライニングが取り付けられてなる左方および右方のブレーキレバーと、
左方と右方の前記ブレーキレバーを互いに近接および離間させるように揺動させるリンク機構と、
左右の前記ブレーキレバーが互いに離間して制動が解除された開状態となるように前記リンク機構を動作させるスラスターと、
前記スラスターが動作していないときに左右の前記ブレーキレバーが互いに近接して制動が掛かる閉状態となるように前記リンクを動作させるスプリング機構と、
前記ブレーキライニングの摩耗状態に応じて開状態における左右の前記ブレーキレバーの狭角を調整する自動摩耗調整装置と、
開状態において、前記ブレーキディスクと左方および右方のそれぞれの前記ブレーキライニングまでの左右方向の間隔を均一に調整する自動ギャップ振り分け装置と、
を備え、
前記リンク機構は、左右の前記ブレーキレバーの上方に左右方向に架け渡されたレバー機構と連結装置とにより構成され、
前記レバー機構は、左右一方の端部に前後方向に延長する回転軸を有して左右一方のブレーキレバーの上端側に軸支されているとともに左右他方のブレーキレバーの上端側に向かって架け渡されてなり、
前記連結装置は、棒状で、左右他方の端部に前後方向に延長する回転軸を有して左右他方のブレーキレバーの上端側に軸支されているとともに、左右一方の端部に至る途上に前後に延長する回転軸を有して前記レバー機構の左右一方の端部に軸支されてなり、
前記スラスターは、上端が前記レバー機構における左右他方の端部に回転軸を介して取り付けられて上下方向に昇降可能なロッドを備え、当該ロッドを上昇させることで前記開状態とし、
前記スプリング機構は、前記レバー機構の所定位置に回転軸を介して取り付けられて、スプリングの復元力により前記閉状態を維持するように前記レバー機構を付勢し、
前記連結装置は、棒状の軸方向に回転軸を有するスピンドルを備え、当該スピンドルが所定方向に回転することで全長が短縮し、
前記自動摩耗調整装置は、前記スピンドルを一方向にのみ回転させる一方向クラッチを備え、前記レバー機構および前記連結装置のそれぞれの左右一方の端部の位置の相対的な変位に従って前記一方向クラッチを回転させ、
前記自動ギャップ振り分け装置は、左右一方の前記ブレーキレバーの下端側に左右一方の外方向に向かって突出するストッパーに螺着されつつ当該ストッパーを上下方向に貫通する調整ボルトと、調整ボルトの下端を下支えする台座と、前記スピンドルと前記調整ボルトとの間に介在して当該スピンドルと前記調整ボルトの回転を連動させるたわみ軸とを備え、前記スピンドルが前記連結装置を短縮させるよう回転するのに従って、前記調整ボルトを前記ストッパーに対して下方に突出させるように回転させる。
===実施例について===
従来のディスクブレーキ装置では、AWAによってブレーキレバーの開閉角度が一定に維持されていても、ACDによって調整したブレーキレバーの傾斜の修正状態がディスクブレーキ装置を動作させている過程で狂ってくる可能性があった。そこで、本発明の実施例に係るディスクブレーキ装置では、ACDによってブレーキレバーの傾斜が調整されたならば、AWAによってブレーキレバーの開閉角度が再調整されない限り、その傾斜の調整状態を維持する、との技術思想に基づいた構成や構造を備えている。概略的には、本発明の実施例に係るディスクブレーキ装置の基本構成は、上記特許文献1あるいは上記非特許文献1および2に記載のディスクブレーキ装置と同様であり、AWAの構成や構造もこれらの文献に記載のものと実質的に同じである。しかし、AWAの機構や動作を巧みに利用することでACDの誤動作を確実に抑止できるようになっている。そこで以下では、まず、AWAの機構や動作について詳しく説明し、その上で、本実施例に係るディスクブレーキの構成、構造、および動作について説明する。
===AWA===
図6は、AWAとして動作する連結装置を示す図である。当該図は、棒状の連結装置20を、軸に対して直交する方向から見たときの図であり、図3におけるa-a矢視方向に相当する。また、図示した連結装置20の一部については、構造が容易に理解できるように、軸を含む面で切断したときの断面で示した。なお、断面は、図3におけるb-b矢視断面に相当し、断面をハッチングで示した。ここで、右方から左方に向かって斜め下方に延長する連結装置20および、連結装置20を構成する各部材について、右方の端部を基端、左方の端部を先端とすると、連結装置20は、先端側の周囲側面に雄ねじ121が形成されたスピンドル120を備え、スピンドル120の先端側の雄ねじ121が、当該スピンドル120の先端側に配置されたスリーブ(以下、スレッドスリーブ122とも言う)の内面に形成された雌ねじ123に螺合されている。それによってスピンドル120の先端側がスレッドスリーブ122の基端側に挿入されている。
ここでまず、ブレーキライニング(図3、符号5L,5R)に摩耗がない場合について説明すると、図7A、図7Bに示したように、カラーストップ140が上下に回動しても一方向クラッチ130に取り付けられて係合ピン131は、カラーストップ140の中空部141内で相対的に上下動するものの、中空部141の内面に当接せず、係合ピン131を介して一方向クラッチ130が回動することはない。
===AWA-ACD連動機構===
本実施例のディスクブレーキ装置は、AWAとACDを直接連動させる機構に特徴を有する。AWAについては、上述したように、従来のディスクブレーキ装置と同様の機構によって動作する。本実施例のディスクブレーキ装置におけるACDについては、ギャップを調整するための原理自体は従来のACDと同様である。すなわち、調整ボルトを回転させてストッパーの下方に突出する調整ボルトの長さを変化させることで、左右のブレーキレバーがブレーキディスクに対して左右対称に揺動するように調整する。しかし、本実施例のディスクブレーキ装置では、ACDにおける調整ボルトを回転させるための機構が、ラック・アンド・ピニオンではなく、AWAにおけるスピンドルの回転動作に直接連動させる機構によって構成されている。
===その他の実施例===
上記実施例では、傘歯車を用いてスピンドルの回転軸の方向をほぼ鉛直上下方向に変換していたが、ディスクブレーキ装置の設置スペースが許せば、フレキシブルシャフトをスピンドルの回転軸に直接取り付け、フレキシブルシャフトを当該回転軸方向に延長させつつ下方に向かって湾曲させて調整ボルトに接続してもよい。あるいは、ギアボックスの出力軸や調整ボルトに金属製のシャフトなど、可撓性を有しないシャフトを取り付け、そのシャフトの先端にフレキシブルシャフトを接続することもできる。いずれにしても、スピンドルの基端から調整ボルトまでの経路の一部にフレキシブルシャフトが介在していれば、ディスクブレーキ装置の開閉動作に伴って各部位の相対的な位置関係が変化してもスピンドルの回転によって調整ボルトを回転させることができる。
3L,3R ブレーキレバー、4 ブレーキシュー、5L,5R ブレーキライニング、6 ベースプレート、10 リンク機構、11,11a,11b ベントレバー、
12,12a,12b ショートレバー、20 連結装置、
21,22 連結装置のクロスピース、40 スラスター、50 スプリング機構、
72 調整ボルト、74 ストッパー、75 台座、120 スピンドル、
130 一方向クラッチ、140 カラーストップ、
150 フレキシブルシャフト(たわみ軸)、160 ギアボックス
Claims (6)
- ブレーキディスクを左右方向で互いに対面する左方および右方の前記ブレーキライニングに狭持させることで前記ブレーキディスクの回転に制動を掛けるディスクブレーキ装置であって、
それぞれが下端に前後方向に延長する回転軸を有して立設されているとともに、それぞれに前記ブレーキライニング取り付けられてなる左方および右方のブレーキレバーと、
左方と右方の前記ブレーキレバーを互いに近接および離間させるように揺動させるリンク機構と、
左右の前記ブレーキレバーが互いに離間して制動が解除された開状態となるように前記リンク機構を動作させるスラスターと、
前記スラスターが動作していないときに左右の前記ブレーキレバーが互いに近接して制動が掛かる閉状態となるように前記リンク機構を動作させるスプリング機構と、
前記ブレーキライニングの摩耗状態に応じて開状態における左右の前記ブレーキレバーの狭角を調整する自動摩耗調整装置と、
開状態において、前記ブレーキディスクと左方および右方のそれぞれの前記ブレーキライニングまでの左右方向の間隔を均一に調整する自動ギャップ振り分け装置と、
を備え、
前記リンク機構は、左右の前記ブレーキレバーの上方に左右方向に架け渡されたレバー機構と連結装置とにより構成され、
前記レバー機構は、左右一方の端部に前後方向に延長する回転軸を有して左右一方のブレーキレバーの上端側に軸支されているとともに左右他方のブレーキレバーの上端側に向かって架け渡されてなり、
前記連結装置は、棒状で、左右他方の端部に前後方向に延長する回転軸を有して左右他方のブレーキレバーの上端側に軸支されているとともに、左右一方の端部に至る途上に前後に延長する回転軸を有して前記レバー機構の左右一方の端部に軸支されてなり、
前記スラスターは、上端が前記レバー機構における左右他方の端部に回転軸を介して取り付けられて上下方向に昇降可能なロッドを備え、当該ロッドを上昇させることで前記開状態とし、
前記スプリング機構は、前記レバー機構の所定位置に回転軸を介して取り付けられて、スプリングの復元力により前記閉状態を維持するように前記レバー機構を付勢し、
前記連結装置は、棒状の軸方向に回転軸を有するスピンドルを備え、当該スピンドルが所定方向に回転することで全長が短縮し、
前記自動摩耗調整装置は、前記スピンドルを一方向にのみ回転させる一方向クラッチを備え、前記レバー機構および前記連結装置のそれぞれの左右一方の端部の位置の相対的な変位に従って前記一方向クラッチを回転させ、
前記自動ギャップ振り分け装置は、左右一方の前記ブレーキレバーの下端側に左右一方の外方向に向かって突出するストッパーに螺着されつつ当該ストッパーを上下方向に貫通する調整ボルトと、当該調整ボルトの下端を下支えする台座と、前記スピンドルと前記調整ボルトとの間に介在して当該スピンドルと前記調整ボルトの回転を連動させるたわみ軸とを備え、前記スピンドルが前記連結装置を短縮させるよう回転するのに従って、前記調整ボルトを前記ストッパーに対して下方に突出させるように回転させる、
ディスクブレーキ装置。 - 請求項1において、前記たわみ軸がコイル型たわみ軸であるディスクブレーキ装置。
- 請求項1において、前記たわみ軸が自在継手形たわみ軸であるディスクブレーキ装置。
- 請求項1において、前記スピンドルと前記たわみ軸との間に介在する変速ギアを備えているディスクブレーキ装置。
- 請求項1において、
前記自動ギャップ振り分け装置は、前記スピンドルのピッチと前記制御ボルトのピッチとの比にしたがって、前記スピンドルが所定の角度だけ回転すると前記調整ボルトを前記ストッパーに対して所定の長さだけ下方に突出させる、
ディスクブレーキ装置。 - 請求項1において、前記スピンドルの回転軸を下方向に延長する回転軸に変換するギア機構を備えたディスクブレーキ装置。
Priority Applications (7)
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MYPI2019007246A MY197098A (en) | 2017-06-16 | 2018-04-05 | Disc brake device |
US16/621,241 US11173881B2 (en) | 2017-06-16 | 2018-04-05 | Disc brake device |
JP2019525129A JP6767064B2 (ja) | 2017-06-16 | 2018-04-05 | ディスクブレーキ装置 |
CN201880040006.8A CN110770461B (zh) | 2017-06-16 | 2018-04-05 | 盘式制动装置 |
EP18816641.7A EP3640495B1 (en) | 2017-06-16 | 2018-04-05 | Disc brake device |
KR1020207000582A KR102217662B1 (ko) | 2017-06-16 | 2018-04-05 | 디스크 브레이크 장치 |
SG11201912123YA SG11201912123YA (en) | 2017-06-16 | 2018-04-05 | Disc brake device |
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EP (1) | EP3640495B1 (ja) |
JP (1) | JP6767064B2 (ja) |
KR (1) | KR102217662B1 (ja) |
CN (1) | CN110770461B (ja) |
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- 2018-04-05 KR KR1020207000582A patent/KR102217662B1/ko active IP Right Grant
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JP6767064B2 (ja) | 2020-10-14 |
US20200101947A1 (en) | 2020-04-02 |
CN110770461A (zh) | 2020-02-07 |
SG11201912123YA (en) | 2020-01-30 |
MY197098A (en) | 2023-05-24 |
KR102217662B1 (ko) | 2021-02-19 |
EP3640495A4 (en) | 2020-11-04 |
US11173881B2 (en) | 2021-11-16 |
EP3640495A1 (en) | 2020-04-22 |
KR20200014912A (ko) | 2020-02-11 |
EP3640495B1 (en) | 2022-05-04 |
JPWO2018230114A1 (ja) | 2020-04-16 |
CN110770461B (zh) | 2021-02-26 |
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