WO2022239247A1 - 鉄道車両用ディスクブレーキ装置 - Google Patents
鉄道車両用ディスクブレーキ装置 Download PDFInfo
- Publication number
- WO2022239247A1 WO2022239247A1 PCT/JP2021/018490 JP2021018490W WO2022239247A1 WO 2022239247 A1 WO2022239247 A1 WO 2022239247A1 JP 2021018490 W JP2021018490 W JP 2021018490W WO 2022239247 A1 WO2022239247 A1 WO 2022239247A1
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- WIPO (PCT)
- Prior art keywords
- hole
- disc
- fastening
- control member
- fins
- Prior art date
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 63
- 238000009423 ventilation Methods 0.000 description 13
- 238000006073 displacement reaction Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
- F16D65/124—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting adapted for mounting on the wheel of a railway vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0047—Hubs characterised by functional integration of other elements
- B60B27/0052—Hubs characterised by functional integration of other elements the element being a brake disc
-
- 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
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
-
- 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
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/128—Discs; Drums for disc brakes characterised by means for cooling
-
- 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
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/847—Features relating to cooling for disc brakes with open cooling system, e.g. cooled by air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2900/00—Purpose of invention
- B60B2900/10—Reduction of
- B60B2900/133—Noise
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B2900/00—Purpose of invention
- B60B2900/50—Improvement of
- B60B2900/513—Cooling, e.g. of brakes
-
- 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
- F16D65/0006—Noise or vibration control
Definitions
- the present disclosure relates to a disc brake device for rail vehicles.
- a disc brake device is widely used as a braking device for railway vehicles.
- a disc brake device includes an annular brake disc and a brake lining.
- the brake disc is, for example, fastened to the wheel and rotates with the wheel.
- a brake lining is pressed against the brake disc. The friction between the brake lining and the brake disc brakes the brake disc and the wheel.
- the brake discs of disc brake devices used in railway vehicles are required to have sufficient cooling performance from the perspective of ensuring their durability.
- a plurality of fins are generally radially formed on the rear surface of the brake disc. Each fin contacts the wheel and forms an air passage between the underside of the brake disc and the wheel. The air passage allows air to pass from the inner peripheral side of the brake disc to the outer peripheral side thereof when the brake disc rotates together with the wheel. The air flowing through the air passage cools the brake disc.
- Patent Literature 1 discloses a disc brake device in which fins adjacent to each other in the circumferential direction are connected by a connecting portion.
- the connecting portion forms a portion with the smallest cross-sectional area in each of the air passages between the fins. According to Patent Document 1, by setting the sum of the minimum cross-sectional areas of the air passages to 18000 mm 2 or less, aerodynamic noise during high-speed running can be reduced.
- the connecting portion for reducing aerodynamic noise is integrally formed with the disc body and fins of the brake disc. Therefore, the rigidity of the portion of the brake disc near the connecting portion is greater than that of the other portions. Therefore, when the brake lining slides against the brake disc during braking and frictional heat is generated, the portion near the connecting portion is less likely to be thermally deformed than other portions, and the brake disc is warped. As a result, the load on the fastening member that fastens the brake disc to the wheel increases.
- Patent Document 2 proposes a technique in which an aerodynamic noise reduction member (control member) separate from the brake disc is provided in the disc brake device. According to Patent Document 2, by blocking a portion of the air passage with a protrusion provided on the control member, air flow in the air passage is suppressed and aerodynamic noise generated during running of the railway vehicle is reduced. be able to. Also, since the brake disc and the control member are separate parts, the protrusion of the control member does not affect the rigidity of the brake disc.
- the control member is arranged between a rotating member such as a wheel and the brake disc, and is fastened to the rotating member together with the brake disc by a fastening member.
- a shaft portion of the fastening member extends from the brake disc to the rotating member through a through hole provided in the control member.
- control member since the control member is away from the sliding portion between the brake disc and the brake lining, it hardly deforms due to heat. Therefore, when the brake disc thermally expands and the fastening member moves accordingly, the shaft portion of the fastening member may interfere with the peripheral edge of the through hole of the control member, and an excessive load may be applied to the control member.
- An object of the present disclosure is to reduce the load on the control member in a railway vehicle disc brake device provided with a control member for controlling the amount of ventilation in the ventilation path.
- the disc brake device is a disc brake device for railway vehicles.
- a disc brake device includes a rotating member, a brake disc, a control member, and a fastening member.
- the rotating member is attached to the axle of the railway vehicle.
- the brake disc includes an annular disc body and a plurality of fins.
- the disk body has a back surface facing the rotating member.
- the fins are radially arranged on the back surface.
- the control member includes a base plate and a protrusion.
- a base plate is sandwiched between the rotating member and the fins.
- the protrusion protrudes from the base plate toward the disc body and is positioned between adjacent fins of the fins in the circumferential direction of the brake disc.
- a control member controls the amount of airflow between adjacent fins.
- a fastening member fastens the brake disc and the control member to the rotating member.
- At least one of the fins has a first fastening hole.
- the first fastening hole includes a large diameter portion and a small diameter portion.
- the head portion of the fastening member is arranged in the large diameter portion.
- the small diameter portion has a smaller diameter than the diameter of the large diameter portion.
- the shaft portion of the fastening member is inserted through the small diameter portion.
- the base plate has through holes.
- a through hole is provided in the base plate corresponding to the first fastening hole.
- the shaft portion of the fastening member is inserted through the through hole.
- the peripheral edge of the through hole is arranged on the outer peripheral side of the peripheral edge of the small diameter portion of the first fastening hole.
- FIG. 1 is a longitudinal sectional view showing a schematic configuration of a railroad vehicle disc brake device according to an embodiment.
- 2 is a rear view of a brake disc and a control member included in the disc brake device shown in FIG. 1.
- FIG. FIG. 3 is a cross-sectional view along III-III in FIG. 4 is a partially enlarged view of the disc brake device shown in FIG. 1.
- FIG. 5 is a graph of radial position versus axial displacement during braking for an exemplary control member.
- FIG. 6 is a graph of radial position versus axial displacement during braking for another embodiment of a control member.
- FIG. 7 is a perspective view schematically showing the control member of the analysis model used in each example.
- the disc brake device is a disc brake device for railway vehicles.
- a disc brake device includes a rotating member, a brake disc, a control member, and a fastening member.
- the rotating member is attached to the axle of the railway vehicle.
- the brake disc includes an annular disc body and a plurality of fins.
- the disk body has a back surface facing the rotating member.
- the fins are radially arranged on the back surface.
- the control member includes a base plate and a protrusion.
- a base plate is sandwiched between the rotating member and the fins.
- the protrusion protrudes from the base plate toward the disc body and is positioned between adjacent fins of the fins in the circumferential direction of the brake disc.
- a control member controls the amount of airflow between adjacent fins.
- a fastening member fastens the brake disc and the control member to the rotating member.
- At least one of the fins has a first fastening hole.
- the first fastening hole includes a large diameter portion and a small diameter portion.
- the head portion of the fastening member is arranged in the large diameter portion.
- the small diameter portion has a smaller diameter than the diameter of the large diameter portion.
- the shaft portion of the fastening member is inserted through the small diameter portion.
- the base plate has through holes.
- a through hole is provided in the base plate corresponding to the first fastening hole.
- the shaft portion of the fastening member is inserted through the through hole.
- the peripheral edge of the through hole is arranged on the outer peripheral side of the peripheral edge of the small diameter portion of the first fastening hole (first configuration).
- the control member can control the amount of ventilation between the fins adjacent in the circumferential direction on the back surface of the disc body of the brake disc. That is, in the disc brake device described above, since the protrusion of the control member is positioned between the adjacent fins, the opening area of the air passage formed by these fins together with the disc body and rotating member is partially reduced. As a result, it is possible to limit the amount of ventilation in the ventilation passage, and to reduce the aerodynamic noise that occurs when the railway vehicle is running.
- At least one of the fins provided on the brake disc has a first fastening hole.
- the first fastening hole includes a small diameter portion through which the shaft portion of the fastening member is inserted.
- the base plate of the control member is formed with a through hole through which the shaft portion of the fastening member is inserted.
- the peripheral edge of this through hole is arranged on the outer peripheral side of the peripheral edge of the small diameter portion of the first fastening hole. That is, the peripheral edge of the through hole of the control member is located farther from the shaft portion of the fastening member than the peripheral edge of the small diameter portion of the first fastening hole of the brake disc.
- the rotating member can have a second fastening hole.
- the second fastening hole is provided in the rotary member corresponding to the first fastening hole of the brake disc and the through hole of the control member.
- the shaft portion of the fastening member is inserted through the second fastening hole. It is preferable that the peripheral edge of the through hole is arranged on the outer peripheral side of the peripheral edge of the second fastening hole (second configuration).
- the peripheral edge of the through hole formed in the base plate of the control member is arranged on the outer peripheral side of the peripheral edge of the second fastening hole formed in the rotating member.
- the portion of the base plate of the control member near the through hole is sandwiched between the rotating member and the fins. Therefore, in the base plate of the control member, it is possible to suppress the portion near the through hole from falling into the second fastening hole of the rotary member due to the axial load from the head portion of the fastening member. That is, the axial displacement of the control member can be reduced.
- the distance between the peripheral edge of the through hole and the peripheral edge of the second fastening hole is preferably greater than 2.0 mm (third configuration).
- the peripheral edge of the through hole of the control member is more than 2.0 mm away from the peripheral edge of the second fastening hole of the rotating member.
- the width of the through-hole in the circumferential direction of the brake disc is preferably smaller than the maximum width of the top surface of the fin having the first fastening hole (fourth configuration).
- the width of the through-hole formed in the base plate of the control member is smaller than the maximum width of the top surface of the fin. As a result, it is possible to prevent the fins from being deformed into the through holes of the control member.
- FIG. 1 is a longitudinal sectional view showing a schematic configuration of a railroad vehicle disc brake device 100 according to the present embodiment.
- a longitudinal section refers to a section obtained by cutting the disc brake device 100 along a plane including the central axis X.
- the central axis X is the axis of the axle 200 of the railway vehicle.
- the direction in which the central axis X extends will be referred to as the axial direction.
- the disc brake device 100 includes a rotating member 10, a brake disc 20, a control member 30, and a fastening member 40.
- the rotating member 10 is attached to the axle 200 and rotates around the central axis X integrally with the axle 200 .
- the rotating member 10 is a railroad vehicle wheel and has a plate portion 11 .
- the rotating member 10 may be a disk body other than a wheel.
- the rotating member 10 has a fastening hole 12 through which the fastening member 40 is passed.
- the fastening hole 12 axially penetrates the rotary member 10 .
- the brake discs 20 are provided on both sides of the disc-shaped rotary member 10 .
- a control member 30 is arranged between the rotating member 10 and each brake disc 20 .
- These brake disc 20 and control member 30 are fastened to the plate portion 11 of the rotary member 10 by fastening members 40 .
- the fastening member 40 is typically composed of bolts and nuts.
- a brake lining 50 is provided on the outside of each brake disc 20 in the axial direction.
- FIG. 2 is a view (rear view) of one brake disc 20 and control member 30 of the brake discs 20 and the control member 30 arranged on both surfaces of the rotary member 10 as seen from the rotary member 10 side.
- FIG. 2 shows the brake disc 20 and the 1/4 circumference portion of the control member 30 .
- the circumferential direction and the radial direction of the brake disc 20 are simply referred to as the circumferential direction and the radial direction.
- brake disc 20 includes disc body 21 and a plurality of fins 22 .
- the disc body 21 is annular.
- the disk main body 21 substantially has an annular plate shape with the central axis X as the axis.
- the disc body 21 has a sliding surface 211 and a back surface 212 .
- the sliding surface 211 is a surface provided on one side of the disk body 21 in the axial direction.
- a brake lining 50 (FIG. 1) is pressed against the sliding surface 211 to generate a braking force.
- the back surface 212 is a surface provided on the other side in the axial direction of the disk body 21 and faces the rotating member 10 (FIG. 1).
- a plurality of fins 22 are radially arranged on the back surface 212 of the disk body 21 . These fins 22 radially extend from the inner side to the outer side of the disk body 21 . Each fin 22 protrudes from the rear surface 212 toward the rotary member 10 (FIG. 1). Therefore, a space is formed between the rotating member 10 , the fins 22 adjacent in the circumferential direction, and the disk body 21 . These spaces serve as air passages through which air passes when the brake disc 20 rotates together with the rotating member 10 .
- each fastening hole 222 is provided corresponding to the fastening hole 12 ( FIG. 1 ) of the rotating member 10 .
- Each fastening hole 222 penetrates the disk body 21 and the fins 22 .
- a recessed key groove 223 is formed on the top surface 221 of the other fins 22 .
- a key (not shown) for restricting relative rotation between the brake disc 20 and the rotating member 10 (FIG. 1) is fitted in the key groove 223 .
- the number of fins 22, the number of fastening holes 222, and the number of key grooves 223 can be set as appropriate. In the example of this embodiment, all the fins 22 are formed with the fastening holes 222 or the key grooves 223, but there may be some fins 22 without the fastening holes 222 and the key grooves 223 formed therein.
- control member 30 is a separate member from the brake disc 20.
- the control member 30 controls the amount of ventilation between the fins 22 adjacent in the circumferential direction.
- Control member 30 includes a base plate 31 and a plurality of protrusions 32 .
- the base plate 31 has a substantially annular plate shape and is arranged substantially coaxially with the disk main body 21 .
- Base plate 31 is sandwiched between rotating member 10 ( FIG. 1 ) and plurality of fins 22 . That is, the rotating member 10 contacts one surface of the base plate 31 , and the top surface 221 of the fin 22 contacts the other surface of the base plate 31 .
- the length of the base plate 31 in the radial direction is approximately equal to the length of the top surface 221 of the fin 22 in the radial direction.
- the length of the base plate 31 in the radial direction may be longer than the length of the top surface 221 of the fin 22 or shorter than the length of the top surface 221 of the fin 22 . If the length of the base plate 31 is shorter than the length of the top surface 221 of the fin 22 , the top surface 221 of the fin 22 may be formed with a recess for accommodating the base plate 31 .
- a plurality of through holes 311 are formed in the base plate 31 corresponding to the fastening holes 12 (FIG. 1) of the rotary member 10 and the fastening holes 222 of the brake disc 20 for inserting the fastening members 40 (FIG. 1). there is Further, the base plate 31 is formed with a plurality of openings 312 corresponding to the key grooves 223 of the brake disc 20 for inserting the aforementioned keys (not shown).
- Each through hole 311 has a width W in the circumferential direction.
- the width W of the through hole 311 is smaller than the maximum width WF of the top surface 221 of the fin 22 having the fastening hole 222 .
- the width W is the length of a straight line that connects the ends of each through hole 311 in the circumferential direction.
- the maximum width WF is the maximum value of the length of a straight line connecting both side edges of the top surface 221 of the fin 22 and perpendicular to the radial direction.
- the top surface 221 of the fin 22 has, for example, a maximum width WF in the area where the fastening holes 222 open.
- the difference between the maximum width W F of the fin and the width W of the through-hole 311 is preferably greater than 3.0 mm (W F ⁇ W>3.0 mm), more preferably greater than 4.0 mm (W F -W>4.0 mm).
- the width W of the through hole 311 is, for example, less than 47.0 mm, preferably less than 44.0 mm, and more preferably less than 43.0 mm.
- the through holes 311 can be formed in various shapes.
- the through hole 311 has a circular shape when the control member 30 is viewed from above or from the back.
- the width W of the through-hole 311 is the diameter of the through-hole 311 .
- the through hole 311 may have an elliptical shape, for example, when the control member 30 is viewed from above or from the rear.
- the through-hole 311 has an elliptical shape with a major axis in the radial direction
- the width W of the through-hole 311 is the minor axis of the through-hole 311 .
- the width W of the through-hole 311 is the major axis of the through-hole 311 .
- a plurality of projections 32 are formed on the surface of the base plate 31 on the side of the brake disc 20 among both surfaces.
- the projecting portions 32 are provided at intervals in the circumferential direction.
- Each protrusion 32 protrudes from the base plate 31 toward the disc body 21 and is positioned between the fins 22 adjacent in the circumferential direction. That is, one protruding portion 32 is arranged between the fins 22 adjacent in the circumferential direction.
- FIG. 3 is a cross-sectional view taken along line III-III in FIG.
- each protrusion 32 protrudes from the base plate 31 toward the rear surface 212 of the disc body 21 .
- the tip of the protrusion 32 does not contact the rear surface 212 of the disk body 21 .
- both side edges of the projecting portion 32 do not contact the side surfaces 225 of the fins 22 . Therefore, a substantially U-shaped space is formed between the projecting portion 32 and the brake disc 20 when viewed in the radial direction.
- the sum of the cross-sectional areas of the approximately U-shaped spaces formed between the projecting portions 32 and the brake disc 20 can be, for example, 18000 mm 2 or less.
- the total sum of the cross-sectional areas can be, for example, 2500 mm 2 or more.
- the cross-sectional area of the substantially U-shaped space is the minimum cross-sectional area along the circumferential direction of the substantially U-shaped space formed between each protrusion 32 and the brake disc 20 .
- the total cross-sectional area is a value calculated by adding up all the cross-sectional areas of each space in the circumferential direction.
- the projecting portion 32 has a substantially triangular vertical cross section (cross section along the radial direction). That is, the radially inner surface of the protruding portion 32 tilts toward the back surface 212 of the disc body 21 toward the outer peripheral side of the disc body 21 .
- the shape of the projecting portion 32 is not particularly limited.
- the protrusion 32 may be hollow or solid. From the viewpoint of smoothly guiding the air in the air passage, the surface of the projecting portion 32 preferably has a smooth shape without corners.
- the control member 30 can be made of a thin metal material having a plate thickness of 1.0 mm to 3.0 mm.
- the control member 30 is formed, for example, by pressing this thin material.
- the base plate 31 and the plurality of protrusions 32 are integrally formed.
- the projecting portion 32 can be fixed to the base plate 31 by welding or the like.
- FIG. 4 is a partially enlarged view of FIG. 1.
- the brake disc 20 and the control member 30 are fastened to the rotating member 10 by fastening members 40 .
- the fastening member 40 is inserted into the fastening hole 222 provided in the brake disc 20 , the through hole 311 provided in the control member 30 , and the fastening hole 12 provided in the rotating member 10 .
- the fastening hole 222 includes a large diameter portion 222a and a small diameter portion 222b.
- the small-diameter portion 222 b constitutes the end portion of the fin 22 on the side of the top surface 221 in the fastening hole 222 .
- the small diameter portion 222b has a diameter DBS that is smaller than the diameter DBL of the large diameter portion 222a.
- An annular bottom portion 224 is formed around the small diameter portion 222b due to the difference in diameter between the large diameter portion 222a and the small diameter portion 222b.
- the head portion 41 of the fastening member 40 is arranged in the large diameter portion 222a.
- Head 41 is a bolt head or nut.
- the head portion 41 within the large diameter portion 222a is directly or indirectly supported by the bottom portion 224.
- one or more disc springs 60 are arranged between the head portion 41 and the bottom portion 224 . That is, the head portion 41 is supported by the bottom portion 224 via the disc spring 60 .
- the thickness (length in the axial direction) of the bottom portion 224 is preferably 1.0 mm or more, and more preferably 2.0 mm or more.
- the thickness of the bottom portion 224 is, for example, 6.0 mm or less.
- the shaft portion 42 of the bolt of the fastening member 40 is inserted through the small diameter portion 222b.
- the shaft portion 42 extends axially from the head portion 41 within the large diameter portion 222 a and is inserted through the small diameter portion 222 b , the through hole 311 of the control member 30 and the fastening hole 12 of the rotating member 10 .
- each through-hole 311 provided in the base plate 31 has a minimum spanning length L.
- the length L is the length of the shortest straight line among straight lines connecting two points on the periphery of each through hole 311 and passing through the center of the through hole 311 .
- the length L is the diameter of the through hole 311 and is equal to the width W (FIG. 2).
- length L is the minor axis of through hole 311 .
- the length L of the through hole 311 is greater than the diameter DBS of the small diameter portion 222b of the fastening hole 222 provided in the brake disc 20 .
- the opening area of the through hole 311 is larger than the opening area of the small diameter portion 222b. Therefore, the peripheral edge of the through hole 311 is arranged on the outer peripheral side of the peripheral edge of the small diameter portion 222b.
- the difference between the length L of the through hole 311 and the diameter D BS of the small diameter portion 222b is preferably 6.0 mm or more (L ⁇ D BS ⁇ 6.0 mm).
- the diameter DBS of the small-diameter portion 222b is smaller than the diameter DW of the fastening hole 12 provided in the rotary member 10 .
- the length L of the through hole 311 is also greater than the diameter DW of the fastening hole 12 of the rotating member 10 .
- the opening area of the through hole 311 is larger than the opening area of the fastening hole 12 . Therefore, the peripheral edge of the through hole 311 is arranged on the outer peripheral side of the peripheral edge of the fastening hole 12 .
- the difference between the length L of the through hole 311 and the diameter D w of the fastening hole 12 is preferably greater than 4.0 mm (LD w >4.0 mm). That is, the distance d between the peripheral edge of the through hole 311 and the peripheral edge of the fastening hole 12 is preferably greater than 2.0 mm.
- the length L of the through hole 311 is, for example, greater than 18.5 mm and less than 47.0 mm.
- the length L is preferably 24.5 mm or more, more preferably greater than 26.0 mm.
- the length L is preferably less than 44.0 mm, more preferably less than 43.0 mm.
- the projecting portion 32 of the control member 30 is arranged between the fins 22 adjacent in the circumferential direction.
- the cross-sectional area of each air passage defined by the rotating member 10, the fins 22, and the disk body 21 is partially reduced. Therefore, it is possible to limit the amount of ventilation in the ventilation path, and to reduce the aerodynamic noise that occurs when the railway vehicle is running.
- the base plate 31 of the control member 30 is provided with a through hole 311 through which the shaft portion 42 of the fastening member 40 is inserted.
- the peripheral edge of the through hole 311 is arranged on the outer peripheral side of the peripheral edge of the small diameter portion 222 b of the fastening hole 222 provided in the brake disc 20 . That is, the peripheral edge of the through-hole 311 is arranged farther from the shaft portion 42 of the fastening member 40 than the peripheral edge of the small-diameter portion 222b.
- the peripheral edge of the through hole 311 of the control member 30 is arranged on the outer peripheral side of the peripheral edge of the fastening hole 12 provided in the rotary member 10 .
- the portion of the control member 30 near the through hole 311 is sandwiched between the substantial portion of the rotating member 10 (the portion other than the fastening hole 12 ) and the fins 22 . Therefore, during braking, for example, even if the bottom portion 224 of the fastening hole 222 of the brake disc 20 receives a load from the head portion 41 of the fastening member 40 via the disc spring 60, the portion of the control member 30 near the through hole 311 are supported by the substantial portion of the rotating member 10 and are unlikely to fall into the fastening hole 12 . Therefore, axial displacement of the control member 30 can be reduced.
- the distance d between the peripheral edge of the through hole 311 of the control member 30 and the peripheral edge of the fastening hole 12 is preferably greater than 2.0 mm.
- the width W of the through hole 311 of the control member 30 is smaller than the maximum width WF of the top surface 221 of the fin 22 . As a result, it is possible to prevent the fins 22 from being deformed into the through holes 311 of the control member 30 .
- the projecting portion 32 of the control member 30 is arranged near the center in the radial direction of the disk body 21, but the position of the projecting portion 32 is not limited to this.
- the projecting portion 32 may be arranged near the outer periphery of the disc main body 21 or may be arranged near the inner periphery of the disc main body 21 .
- the base plate 31 of the control member 30 has a substantially annular plate shape.
- the base plate 31 may be divided into a plurality of pieces in the circumferential direction. That is, the base plate 31 may be composed of a plurality of arcuate parts. These arc-shaped parts are circumferentially arranged between the rotating member 10 and the brake disc 20 in contact with each other or at intervals.
- the arcuate parts each have a plurality of protrusions 32 .
- the disc brake device 100 including the rotating member (wheel) 10, the brake disc 20, the control member 30, the fastening member 40, and the disc spring 60 was modeled in consideration of the symmetry in the circumferential direction.
- the brake disk 20 is an elastic plastic body and the others are an elastic body, and data measured in advance by experiments are given as material property values.
- material properties of general structural steel were used.
- the main dimensional conditions of the analysis model are as follows. ⁇ Brake disc inner diameter: 466.0mm ⁇ Brake disc outer diameter: 720.0mm ⁇ Total thickness of brake disc: 43.5mm ⁇ Thickness of disc body: 22.0 mm
- the analysis was performed under the severest seismic detection braking conditions. That is, assuming that the stop brake is applied while the railway vehicle is running at 360 km/h, the contact between the control member 30 and the fastening member 40 is determined for each diameter L of the through hole 311 of the control member 30 and the axial displacement of the control member 30 was evaluated. Table 1 shows the diameter L of the through hole 311 of the control member 30 in each analysis model.
- the peripheral edge of the through-hole 311 is separated from the peripheral edge of the small-diameter portion 222b by 3.0 mm or more. That is, the difference between the diameter L of the through hole 311 and the diameter D BS of the small diameter portion 222b is preferably 6.0 mm or more (L ⁇ D BS ⁇ 6.0 mm).
- Figures 5 and 6 are No. in Table 1, respectively. 2 and No. 3 is a graph showing the relationship between the radial position and the axial displacement during braking for the control member 30 according to No. 3.
- axial displacement of the control member 30 can be suppressed by setting L> DW and arranging the peripheral edge of the through hole 311 on the outer peripheral side of the peripheral edge of the fastening hole 12 .
- the distance d from the peripheral edge of the fastening hole 12 to the peripheral edge of the through hole 311 is greater than 2.0 mm, the axial displacement of the control member 30 can be suppressed more reliably.
- the width W of the through-hole 311 is made smaller than the maximum width W F of the top surface 221 of the fin 22 (W F >W), the deformation of the fin 22 falling into the through-hole 311 can be suppressed. .
- Disc brake device 10 Rotating member 12: Fastening hole 20: Brake disc 21: Disc body 212: Back surface 22: Fin 221: Top surface 222: Fastening hole 222a: Large diameter portion 222b: Small diameter portion 30: Control member 31: Base plate 311: Through hole 32: Protrusion 40: Fastening member 41: Head 42: Shaft
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
図1は、本実施形態に係る鉄道車両用ディスクブレーキ装置100の概略構成を示す縦断面図である。縦断面とは、中心軸Xを含む平面でディスクブレーキ装置100を切断した断面をいう。中心軸Xは、鉄道車両の車軸200の軸心である。以下、中心軸Xが延びる方向を軸方向という。
図2は、回転部材10の両面上に配置されたブレーキディスク20及び制御部材30のうち、一方のブレーキディスク20及び制御部材30を回転部材10側から見た図(裏面図)である。図2では、ブレーキディスク20及び制御部材30の1/4周部分を示している。以下、ブレーキディスク20の周方向及び径方向を単に周方向及び径方向という。
本実施形態に係るディスクブレーキ装置100では、周方向において隣り合う各フィン22の間に、制御部材30の突出部32が配置されている。これにより、回転部材10と、フィン22と、ディスク本体21とで画定される各通気路の断面積が部分的に小さくなる。よって、通気路内の通気量を制限することができ、鉄道車両の走行時に発生する空力音を低減することができる。
・ブレーキディスクの内径:466.0mm
・ブレーキディスクの外径:720.0mm
・ブレーキディスクの全厚み:43.5mm
・ディスク本体の厚み:22.0mm
10:回転部材
12:締結孔
20:ブレーキディスク
21:ディスク本体
212:裏面
22:フィン
221:頂面
222:締結孔
222a:大径部
222b:小径部
30:制御部材
31:ベースプレート
311:貫通孔
32:突出部
40:締結部材
41:頭部
42:軸部
Claims (4)
- 鉄道車両用のディスクブレーキ装置であって、
前記鉄道車両の車軸に取り付けられる回転部材と、
前記回転部材に対向する裏面を有する環状のディスク本体と、前記裏面上に放射状に配置される複数のフィンと、を含むブレーキディスクと、
前記回転部材と前記フィンとの間に挟まれるベースプレートと、前記ベースプレートから前記ディスク本体に向かって突出して前記フィンのうち前記ブレーキディスクの周方向において隣り合うフィンの間に位置付けられる突出部と、を含み、前記隣り合うフィンの間の通気量を制御する制御部材と、
前記ブレーキディスク及び前記制御部材を前記回転部材に締結する締結部材と、
を備え、
前記フィンの少なくとも1つは、前記締結部材の頭部が配置される大径部と、前記大径部の直径よりも小さい直径を有し、前記締結部材の軸部が挿通される小径部と、を含む第1締結孔を有し、
前記ベースプレートは、前記第1締結孔に対応して設けられ、前記軸部が挿通される貫通孔を有し、
前記貫通孔の周縁は、前記第1締結孔の前記小径部の周縁の外周側に配置される、ディスクブレーキ装置。 - 請求項1に記載のディスクブレーキ装置であって、
前記回転部材は、前記第1締結孔及び前記貫通孔に対応して設けられ、前記軸部が挿通される第2締結孔を有し、
前記貫通孔の前記周縁は、前記第2締結孔の周縁の外周側に配置される、ディスクブレーキ装置。 - 請求項2に記載のディスクブレーキ装置であって、
前記貫通孔の前記周縁と、前記第2締結孔の前記周縁との距離は、2.0mmよりも大きい、ディスクブレーキ装置。 - 請求項1から3のいずれか1項に記載のディスクブレーキ装置であって、
前記周方向における前記貫通孔の幅は、前記第1締結孔を有する前記フィンの頂面の最大幅よりも小さい、ディスクブレーキ装置。
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PCT/JP2021/018490 WO2022239247A1 (ja) | 2021-05-14 | 2021-05-14 | 鉄道車両用ディスクブレーキ装置 |
US18/554,045 US20240183415A1 (en) | 2021-05-14 | 2021-05-14 | Disc brake device for railway vehicle |
CN202180098229.1A CN117321315A (zh) | 2021-05-14 | 2021-05-14 | 铁路车辆用盘式制动器装置 |
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PCT/JP2021/018490 WO2022239247A1 (ja) | 2021-05-14 | 2021-05-14 | 鉄道車両用ディスクブレーキ装置 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09100852A (ja) * | 1995-10-02 | 1997-04-15 | Akebono Brake Ind Co Ltd | ブレーキディスクの装着装置 |
WO2019194203A1 (ja) * | 2018-04-03 | 2019-10-10 | 日本製鉄株式会社 | 空力音低減部材、鉄道車両用ブレーキディスクユニット、鉄道車両用ディスクブレーキ、鉄道車両用車輪および鉄道車両 |
-
2021
- 2021-05-14 US US18/554,045 patent/US20240183415A1/en active Pending
- 2021-05-14 CN CN202180098229.1A patent/CN117321315A/zh active Pending
- 2021-05-14 WO PCT/JP2021/018490 patent/WO2022239247A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09100852A (ja) * | 1995-10-02 | 1997-04-15 | Akebono Brake Ind Co Ltd | ブレーキディスクの装着装置 |
WO2019194203A1 (ja) * | 2018-04-03 | 2019-10-10 | 日本製鉄株式会社 | 空力音低減部材、鉄道車両用ブレーキディスクユニット、鉄道車両用ディスクブレーキ、鉄道車両用車輪および鉄道車両 |
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