WO2020116535A1 - Appareil de mesure de poids de véhicule - Google Patents

Appareil de mesure de poids de véhicule Download PDF

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Publication number
WO2020116535A1
WO2020116535A1 PCT/JP2019/047494 JP2019047494W WO2020116535A1 WO 2020116535 A1 WO2020116535 A1 WO 2020116535A1 JP 2019047494 W JP2019047494 W JP 2019047494W WO 2020116535 A1 WO2020116535 A1 WO 2020116535A1
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WIPO (PCT)
Prior art keywords
collar
peripheral surface
annular
moving body
recess
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Application number
PCT/JP2019/047494
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English (en)
Japanese (ja)
Inventor
秀幸 齋藤
栄作 鈴木
洋輔 下村
Original Assignee
日本精工株式会社
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Application filed by 日本精工株式会社 filed Critical 日本精工株式会社
Priority to JP2020559987A priority Critical patent/JPWO2020116535A1/ja
Publication of WO2020116535A1 publication Critical patent/WO2020116535A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
    • G01G19/10—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles having fluid weight-sensitive devices

Definitions

  • the present invention relates to a device for measuring the weight of a vehicle, for example, a device for measuring the weight of a vehicle, which is incorporated in a suspension device of an automobile and detects overloading, tilting of the vehicle, and the like.
  • Patent Document 1 Conventionally, as a device for measuring the weight of a vehicle, for example, a prior art such as Patent Document 1 has been disclosed.
  • the prior art disclosed in Patent Document 1 is a base assembly in which two welded portions are welded to different attachment positions of a load-bearing member that expands and contracts when a load is applied to the vehicle, and is supported by the base assembly and is applied to the vehicle.
  • a compressive strain detecting sensor element whose output changes as the base assembly expands and contracts in the direction in which the two welded portions approach and separate due to a change in load, and an amplifier which amplifies the output of the compressive strain detecting sensor element are mounted.
  • a simple weight measuring device configured with a circuit board to measure the weight of a vehicle by detecting compression strain.
  • the inventors of the present application succeeded in solving the above problems by providing a simple and inexpensive vehicle weight measuring device capable of measuring the load in the compression direction applied to the suspension device and having excellent durability.
  • the weight measuring device is integrally provided in the suspension device, and includes a mounting body (top plate) connected to the vehicle body side and a moving body (piston that is movable in the axial direction by a coil spring).
  • a mounting body top plate
  • a pressure sensor a sensor body mounted and fixed to the vehicle side
  • a collar fixed to the sensor body and capable of abutting the piston in the axial direction
  • the present invention has been made in order to solve the above-mentioned problems of the prior art, and its object is to provide a pad and a diaphragm that can reduce the number of parts and simplify the assembly process with a simple configuration. It is an object of the present invention to provide a vehicle weight measuring device capable of preventing wear of the vehicle.
  • the first aspect of the present invention is to provide a moving body that moves by elastic force of a spring, An attachment body attached to the vehicle side or the arm side of the suspension device, A pad provided between the moving body and the mounting body,
  • the mounting body is A diaphragm that can be pressed and deformed via the pad by the movement of the moving body,
  • a pressure sensor capable of detecting a pressure change in the oil chamber, Including,
  • the moving body and the mounting body are provided with a relative rotation blocking portion that blocks relative rotation of the moving body and the mounting body,
  • the relative rotation blocking portion has an engaging portion provided on either one of the moving body and the mounting body, and an engaged portion provided on the other of the moving body and engaging with the engaging portion.
  • This is a vehicle weight measuring device.
  • a second aspect of the present invention is the first aspect of the present invention, wherein the mounting body includes a collar arranged to face the moving body, With the vehicle weight measuring device in which the engaging portion is provided on any one of the surface portions of the moving body and the collar which face each other, and the engaged portion is provided on the other surface portion. is there.
  • a third aspect of the present invention is the vehicle weight measuring device according to the second aspect of the present invention, wherein the movable body is provided with a protrusion and the collar is provided with a recess. It was that.
  • a fourth aspect of the present invention is the vehicle weight measuring device according to the second aspect of the present invention, wherein the collar is provided with a protrusion and the moving body is provided with a recess.
  • a fifth aspect of the present invention is the second aspect of the present invention, wherein the collar is an annular outer collar, An outer peripheral surface having a smaller diameter than the inner peripheral surface of the outer collar, and an annular inner collar that forms an annular space region between the outer peripheral surface and the inner peripheral surface,
  • the moving body has an annular sliding portion that projects toward the inside of the space region and slides on the inner peripheral surface of the outer collar and the outer peripheral surface of the inner collar, At least one of the pair of the inner peripheral surface of the outer collar and the outer peripheral surface of the annular sliding portion, or the pair of the inner peripheral surface of the annular sliding portion and the outer peripheral surface of the inner collar is the engaging portion.
  • one of the engaged parts is provided on the inner peripheral surface, and the other is provided on the outer peripheral surface.
  • a vehicle weight measuring device capable of reducing the number of parts and simplifying the assembly process with a simple structure and capable of preventing wear of pads and diaphragms.
  • FIG. 1 is a plan view showing a first embodiment of a vehicle weight measuring apparatus of the present invention.
  • FIG. 2 is a sectional view taken along line II-II of FIG. 1. It is an exploded view with the piston separated.
  • (A) is a plan view of the piston
  • (b) is a sectional view taken along the line IV-IV of (a)
  • (c) is a perspective view as seen from the plane side.
  • (A) is a plan view of the inner collar
  • (b) is a sectional view taken along the line V-V of (a)
  • (c) is a perspective view seen from the bottom side. It is a principal part expanded sectional view. It is a longitudinal section showing a second embodiment. It is an exploded view with the piston separated.
  • (A) is a plan view of the piston, (b) is a sectional view taken along the line IX-IX of (a), and (c) is a perspective view seen from the plane side.
  • (A) is a plan view of the outer collar, (b) is a sectional view taken along line XX of (a), and (c) is a perspective view seen from the bottom side. It is a principal part expanded sectional view.
  • (A) is a plan view of the piston, (b) is a cross-sectional view taken along the line XII-XII of (a), and (c) is a perspective view seen from the plane side.
  • (A) is a plan view of an outer collar
  • (b) is a sectional view taken along the line XIII-XIII of (a)
  • (c) is a perspective view seen from the bottom side. It is a perspective view showing the state where the outer collar and the inner collar are fastened and fixed to the sensor body.
  • (A) is a plan view of the piston
  • (b) is a cross-sectional view taken along the line XV-XV of (a)
  • (c) is a perspective view seen from the plane side.
  • It is a longitudinal section showing a third embodiment. It is an exploded view with the piston separated.
  • (A) is a plan view of the piston, (b) is a cross-sectional view taken along the line XIX-XIX of (a), and (c) is a perspective view seen from the plane side.
  • (A) is a plan view of the inner collar, (b) is a sectional view taken along line XX-XX of (a), and (c) is a perspective view seen from the bottom surface side. It is a principal part expanded sectional view.
  • FIGS. 7 to 11 show the second embodiment
  • FIGS. 12 to 16 show the third embodiment.
  • This embodiment shows an embodiment in which the vehicle weight measuring device 100 of the present invention is used for a suspension device (suspension) on the front wheel side of an automobile.
  • the present embodiment is an embodiment of the present invention and should not be construed as being limited thereto and the design can be changed within the scope of the present invention.
  • an upper surface side is attached to the vehicle side (indicated as VH in FIGS. 1 and 2), a mounting body (top plate) 200, and an elastic force of the coil spring 700.
  • a movable body (piston) capable of pressing a later-described diaphragm 220 provided on the attachment body (top plate) 200 in the vertical direction (also referred to as an arrow V in FIGS. 2, 3, and 6 and an axial direction).
  • the mounting body (top plate) 200 has a sensor body 250 whose upper surface side is mounted on the vehicle side, collars (outer collar 260, inner collar 240) provided on the lower surface of the sensor body 250, the sensor body 250 and the collar (outer collar 260). , An inner collar 240 ), and a diaphragm 220 sandwiched between the sensor body 250 and the diaphragm 220, and an oil chamber 290 filled with a predetermined measurement fluid (working oil) R, and a sensor.
  • the pressure sensor 300 is provided on the outer peripheral surface 252 of the body 250 and communicates with the oil chamber 290 to detect a pressure change of the measurement fluid R filled in the oil chamber 290.
  • the sensor body 250 is formed in an annular shape having a predetermined diameter and a predetermined thickness (a thickness in the vertical direction) having a hole portion 253 penetrating in the vertical direction at the center, and extends upward from the lower surface 251 side in the vertical direction.
  • An annular first recess 254 that is recessed at a predetermined depth is formed (see FIG. 2 ).
  • the first recess 254 has a vertical depth capable of accommodating the outer collar 260, a part of the piston 230 (annular sliding part 231) and a part of the inner collar 240 (annular part 241), respectively. It has a horizontal width (width in the direction indicated by reference sign W in the drawing) (see FIG. 2).
  • An annular second concave portion 255 is formed vertically upward from the inner peripheral surface of the first concave portion 254 with a predetermined depth.
  • the second recess 255 has a vertical depth and a horizontal width capable of accommodating a part (cylindrical portion 242) of the inner collar 240 (see FIG. 2 ).
  • a third concave portion 256 is formed which shares the inner peripheral surface of the first concave portion 254 and is vertically upwardly recessed at a predetermined depth. (See FIG. 2).
  • the third recess 256 is a recess configured to have a vertical depth and a horizontal width capable of accommodating the annular diaphragm 220 and function as a diaphragm accommodating recess.
  • An annular fourth recess (annular recess) 257 is provided at a predetermined depth toward the inside of the sensor body 250 on the inner upper surface of the third recess 256 (see FIG. 2).
  • the fourth recess (annular recess) 257 is a recess that constitutes the oil chamber 290 together with the diaphragm 220.
  • the fourth recess 257 is formed in an annular shape having an outer peripheral surface having a smaller diameter than the outer peripheral surface of the third recess 256 and an inner peripheral surface having a larger diameter than the inner peripheral surface of the third recess 256 (FIG. 2).
  • a sensor connecting portion (connecting hole) 258 for connecting and arranging the pressure sensor 300 so as to be orthogonal to the outer peripheral surface is provided as a recess.
  • the hole 258 communicates with the oil chamber 290 (see FIG. 2).
  • the sensor body 250 has a plurality of bolt through holes 250a and 250b through which connecting bolts (counter bolts) 400 and 500 for fixing the outer collar 260 and the inner collar 240, respectively, are arranged at predetermined intervals in the circumferential direction. Individually equipped.
  • the pressure sensor 300 is capable of detecting a change in pressure of the measurement fluid R filled in the oil chamber 290, and is, for example, one that measures pressure, converts it into a voltage signal, and transmits the voltage signal. It has a detection unit 302 integrally formed from a sensor main body unit 301 formed in a cylindrical shape.
  • the pressure sensor assumed in the present invention has a well-known structure and is appropriately selected and used within the scope of the present invention, and is not particularly limited to interpretation, and an optimum one within the scope of the present invention is appropriately used. It is selectable.
  • the detection portion 302 is inserted into the sensor connecting portion 258 that is recessed in the outer peripheral surface 252 of the sensor body 250, and the tip detection surface 303 is made to face the inside of the oil chamber 290 and the pressure sensor. 300 is arranged so as to be orthogonal to the outer peripheral surface 252 (see FIGS. 1 and 2). Further, the pressure sensor 300 is connected to a wiring (not shown) that transmits the converted electric signal to the display device on the vehicle body side.
  • connection between the sensor connecting portion 258 and the pressure sensor 300 needs to be connected via a predetermined sealing structure so that the measurement fluid R does not leak.
  • the sealing structure is not particularly described, the best known sealing structure is adopted within the scope of the present invention.
  • the pressure sensor 300 is not necessarily disposed on the outer peripheral surface 252 of the sensor body 250, and the sensor connecting portion 258 is provided on the upper surface or the lower surface of the sensor body 250 as long as the tip detection surface 303 faces the oil chamber 290. It is possible to provide and arrange it at an arbitrary position, and it is possible to adopt and arrange a position that does not hinder the installation.
  • the diaphragm 220 is formed in a thin annular shape that covers the opening region of the fourth recess (annular groove) 257 and forms an oil chamber 290 in a predetermined space together with the fourth recess (annular groove) 257.
  • the inner surface of the sensor body 250 in which the recess 257 is formed is clamped and clamped by an outer collar 260 and an inner collar 240 which are bolted.
  • the third recess 256 has the same thickness as the vertical depth and the same horizontal width.
  • the diaphragm 220 has an inner upper surface of the sensor body 250 and an outer collar 260 on the outer peripheral surface side of the area (oil chamber pressing area) facing the fourth recess 257 forming the oil chamber 290.
  • a sealed area A2 sandwiched between the inner collar 240 and the inner upper surface of the sensor body 250 is formed on the inner peripheral surface side.
  • the material of the diaphragm 220 may be any material that is flexible enough to be pressed and deformed by the movement of the piston 230 and has durability (cold resistance, abrasion resistance, oil resistance), and is not particularly limited.
  • nitrile rubber, Teflon (registered trademark), chloroprene rubber, fluorine rubber, ethylene propylene rubber, or the like is selected as a material suitable for the characteristics of the fluid.
  • a thin metal diaphragm made of stainless steel or the like may be included within the scope of the present invention.
  • the oil chamber 290 In the oil chamber 290, the movement of the piston 230 causes the oil chamber pressing region of the diaphragm 220 to be pressed and deformed toward the inside of the fourth recess (groove) 257, whereby the tip of the pressure sensor 300 facing the oil chamber 290.
  • the pressure change applied to the detection surface 303 can be detected.
  • the oil chamber 290 is filled with a predetermined measuring fluid R in a hermetically sealed manner without generating bubbles.
  • the measurement fluid R is not particularly limited, and a well-known general fluid that is hermetically filled in the oil chamber can be modified in design within the scope of the present invention.
  • the collar has an annular outer collar 260 having an outer peripheral surface that can be in close contact with the inner maximum diameter surface portion (outer peripheral surface) 254a of the first recess 254, and an outer periphery having a smaller diameter than the inner peripheral surface of the outer collar 260.
  • an annular inner collar 240 having an annular space area A1 formed between the outer collar 260 and the inner peripheral surface of the outer collar 260.
  • the outer collar 260 is formed in an annular shape having a vertical wall thickness that is substantially the same as the vertical recess depth of the first recess 254, and is fastened and fixed from the upper surface side of the sensor body 250 via the countersunk bolt 400.
  • the inner peripheral surface of the outer collar 260 has the same diameter as the outer peripheral surface of the fourth recess 257 (see FIG. 2).
  • a plurality of female screw holes 260a into which the flat head bolt 400 is screwed are provided at predetermined intervals in the circumferential direction.
  • the inner collar 240 has an annular portion 241 housed in the first concave portion 254, a diameter smaller than that of the annular portion 241, and is protruded upward in the vertical direction from the annular portion 241 to form the second concave portion. And a cylindrical portion 242 having the same vertical thickness as the vertical depth of 255 (see FIG. 2).
  • the annular portion 241 has an inner peripheral surface having the same diameter as the hole portion 253 of the sensor body 250 and an outer peripheral surface having the same diameter as the inner peripheral surface of the fourth recess 257, and has a predetermined diameter and a predetermined wall thickness. It is formed in a ring shape.
  • the wall thickness of the annular portion 241 is approximately the same as the vertical recess depth of the first recess 254.
  • the cylindrical portion 242 is formed to have an outer peripheral surface that has the same diameter as the inner peripheral surface of the annular portion 241 and can be in close contact with the inner maximum diameter (outer peripheral surface) of the second recess 255, and is directed upward in the vertical direction. Are integrally formed with the annular portion 241.
  • the inner collar 240 is integrally fastened and fixed from the upper surface side of the sensor body 250 via the flat head bolt 500. Further, a plurality of female screw holes 240a into which the flat head bolt 500 is screwed are provided at predetermined intervals in the circumferential direction.
  • a predetermined sealing member is provided to improve the sealing effect of each sealing area A2, A3 and its surroundings.
  • annular first seal groove 260b is provided on the upper surface of the outer collar 260, and the first O-ring 270 is inserted to compress the first O-ring 270 with the lower surface of the diaphragm 220.
  • the annular second seal groove 250c is formed on the upper surface of the sensor body 250 and the sealed O-ring 271 by inserting the second O-ring 271 into the upper surface of the diaphragm 220. And a compressed sealing area.
  • an annular third seal groove 240b is provided on the upper surface of the inner collar 240, and a third O-ring 272 is inserted to compress the third O-ring 272 with the lower surface of the diaphragm 220.
  • a fourth O-ring 273 is inserted into the upper surface of the sensor body 250, and a fourth O-ring 273 is inserted into the inner surface of the sensor body 250. 273 is a compressed sealing area.
  • the second O-ring 271 is compressed in the sealing area A2, and the fourth O-ring 273 is compressed in the sealing area A3, so that the sealing area A2 in the vicinity of the oil chamber 290 is compressed. , A3 are sealed, it is possible to sufficiently prevent the measurement fluid R from leaking from the oil chamber 290.
  • the annular fifth seal groove 260c is provided on the upper surface of the outer collar 260 closer to the outer peripheral surface than the first seal groove 260b, and the fifth O-ring 274 is inserted to insert the first seal groove 260c.
  • the fifth O-ring 274 is compressed between itself and the lower surface of the concave portion 254 to form the sealed area A4. As a result, it is possible to further prevent the measurement fluid R from leaking.
  • the sealing reliability is extremely high. Further, in the present embodiment, since the sealing structure is provided in the area where there is no relative movement as described above, the seal durability is high. Further, the diaphragm 220 is formed to be thicker than the third recess (diaphragm accommodating recess) 256, and can be compressed and sealed when sandwiched between the sensor body 250 and the collar (outer collar 260, inner collar 240). If a sealing structure having a large thickness is provided, the sealing reliability can be further enhanced.
  • the moving body (piston) 230 has an annular base portion 232 whose outer peripheral surface has a larger diameter than the inner peripheral surface of the outer collar 260, and a predetermined upper surface position of the annular base portion 232. From the inner peripheral surface of the outer collar 260 and the outer peripheral surface of the inner collar 240 to a predetermined height in the vertical direction toward the inside of the space area A1, and slides on the inner peripheral surface and the outer peripheral surface. And an annular sliding portion 231 that is arranged so as to be possible.
  • the inner peripheral surface of the annular base portion 232 has substantially the same diameter as the inner peripheral surface of the cylindrical portion 242 of the inner collar 240.
  • the coil base 700 presses the annular base 232 side so that the entire piston 230 can move in the vertical direction.
  • a holding structure 280 having a predetermined shape is provided on the upper surface of the annular sliding portion 231 of the moving body (piston) 230, that is, on the annular surface portion on the side facing the pad 210 (see FIG. 3 ).
  • the holding structure 280 is an annular groove formed in a substantially V shape in a sectional view capable of abutting and holding the pad 210.
  • the holding structure 280 is an annular inner tapered surface 281 and an annular outer surface having a larger diameter than the inner tapered surface 281. And a tapered surface 282.
  • the inclination angle between the inner taper surface 281 and the outer taper surface 282 is not particularly limited and the design can be changed arbitrarily.
  • the pad 210 is provided between the piston 230 and the diaphragm 220 so as to face the oil chamber 290.
  • the fourth recess 257 that is, an annular upper surface that is opposed to the annular opening region 291 of the oil chamber 290 and is formed flat so as to come into close contact with the diaphragm 220 (with respect to the diaphragm 220).
  • the contact area 211 is formed with an inner peripheral surface and an outer peripheral surface that fit within the annular opening area 291 of the oil chamber 290, and the retained structure (projection) 212 is integrally provided on the upper surface 211 in an annular shape.
  • the held structure (convex portion) 212 abuts and is held by the holding structure (annular groove) 280 of the piston 230.
  • the held structure (convex portion) 212 is formed in a V-shaped cross-sectional view capable of contacting and holding the holding structure (annular groove) 280 of the piston 230.
  • an inner taper surface 214 and an outer taper surface 215 that have a diameter that gradually decreases downward (decreases downward) via a short annular portion 213 that is integrally hung from the upper surface 211.
  • an annular flat surface (bottom surface) 216 provided between the lower end of the inner tapered surface 214 and the lower end of the outer tapered surface 215 has a narrow annular shape with respect to the annular upper surface 211. Has been formed.
  • the pad 210 is accommodated and held in contact with the holding structure (annular groove) 280 of the piston 230, and when the piston 230 is in a non-pressed state, the upper surface 211 of the pad 210 contacts without contacting the diaphragm 220. It is configured to be in the state of being.
  • the relative rotation blocking portion 600 is provided on either one of the piston 230 and the inner collar 240 (see FIG. 4) and on the other, so that the projection 610 can move in the vertical direction. It is constituted by a concave portion 620 (see FIG. 5) to be fitted and prevents relative rotation between the piston (moving body) 230 and the mounting body 200 including the inner collar 240.
  • the protrusion 610 is provided on the inner peripheral surface of the piston 230, and the concave portion 620 into which the protrusion 610 is fitted is provided on the outer peripheral surface of the inner collar 240. Specifically, the following configuration is adopted.
  • the protrusion 610 is provided on the inner periphery of the annular sliding portion 231 of the piston 230 on the proximal side and continuously from the upper surface of the annular base 232 at a predetermined height in the vertical direction.
  • the annular sliding portion 231 is provided in a semi-cylindrical shape protruding inward from the inner circumference of the base end side of the annular sliding portion 231 in a semicircular shape in a plan view (see FIG. 4 ).
  • the height of the protrusion 610 in the vertical direction is formed to be about 1/3 of the height of the annular sliding portion 231 (FIGS. 2 to 4 and 5).
  • four protrusions 610 are provided at equal intervals (every 90 degrees) in the circumferential direction (see (a) of FIG. 4 ).
  • the recessed portion 620 is provided so as to extend upward in the vertical direction from the bottom surface (piston facing surface) of the annular portion 241 of the inner collar 240 to the outer peripheral surface with a predetermined height. In the present embodiment, it is recessed in a semi-circular semi-cylindrical shape in a plan view, and is formed to such an extent that the protrusion 610 fits with play.
  • the concave portion 620 has an insertion opening into which the protrusion 610 is inserted on the bottom surface of the annular portion 241 of the inner collar 240, and the load is set so that the piston 230 can move vertically in the vertical direction.
  • a gap L1 is formed between the top surface of the protrusion 610 and the ceiling surface of the recess 620 in a state in which the gap is not applied.
  • a gap L2 is also formed between the vertical outer peripheral surface of the protrusion 610 and the vertical inner peripheral surface of the recess 620.
  • the projection 610 and the recess 620 are not limited to the shapes of the present embodiment, and the projection 610 and the recess 620 are fitted to each other so as to be relatively movable in the vertical direction, so that relative rotation in the circumferential direction (horizontal direction) is achieved. As long as it is a structure capable of blocking, it may be long or short in the circumferential direction, and the degree of protrusion inward or upward is also arbitrary, and all are within the scope of the present invention.
  • the design can be changed. Moreover, the number of each arrangement may be one set or two or more sets, and the design can be arbitrarily changed. If a large number of sets are arranged, the rotational torque can be dispersed and reduced.
  • the relative rotation blocking portion 600 including the protrusion 610 provided on the piston 230 and the recess 620 provided on the inner collar 240 is provided, the piston 230 (moving body) and the inner collar are provided. Only by assembling 240 (mounting body), relative rotation in the circumferential direction (horizontal direction) between piston 230 (moving body) and inner collar 240 (mounting body) can be prevented.
  • the relative rotation blocking portion 600 in which the protrusion 610 is fitted into the recess 620 by adopting the piston 230 is adopted, the relative rotation between the piston 230 (moving body) and the inner collar 240 (mounting body) is blocked. Therefore, there is no need for a new component separately. Therefore, the cost can be reduced by reducing the number of parts and simplifying the assembly process.
  • a recess 620 is provided on the inner peripheral surface of the annular sliding portion 231 of the piston 230 on the base end side, and a protrusion that fits into the recess is formed on the outer peripheral surface of the annular portion 241 of the inner collar 240. It is within the scope of the present invention that the form in which 610 is provided may be used.
  • the held structure (convex portion) 212 of the pad 210 abuts and is held by the holding structure (annular groove) 280 of the piston 230, so that the piston 230 is lifted and lowered by the coil spring 700. Even if movement occurs, the pad 210 is held without being displaced from the holding structure (annular groove) 280 of the piston 230. Therefore, the pad 210 can be sufficiently held, and uneven wear of the pad 210 due to displacement (movement) can be prevented.
  • ⁇ Second embodiment> 7 to 11 show a second embodiment of the present invention.
  • a concave portion 620 that constitutes the relative rotation preventing portion 600 is provided on the outer circumference of the annular sliding portion 231 of the piston 230, and a protrusion 610 is provided on the inner circumference of the outer collar 260. It is an embodiment of the present invention. Since the present embodiment has a characteristic part different from that of the first embodiment in the configuration of the relative rotation blocking part 600, only the description of the relative rotation blocking part 600 will be described, and the description of the other components will be the description of the first embodiment. The description here is omitted.
  • the protrusion 610 is provided on the inner peripheral surface of the outer collar 260 so as to protrude inward (horizontal direction) from a position closer to the bottom surface.
  • the projecting portion 610 is continuously provided from the bottom surface of the outer collar 260, and is projectingly provided on the inner peripheral surface at a predetermined height in the vertical direction. In the present embodiment, it is provided in a semi-cylindrical shape that projects inward from the inner peripheral surface in a semi-circular shape in plan view (see FIG. 10 ).
  • the height of the protrusion 610 in the vertical direction is formed to be about 1/4 of the height of the entire outer collar 260 (see FIGS. 7, 8, 10, and 11). Further, in the present embodiment, four protrusions 610 are provided at equal intervals (every 90 degrees) in the circumferential direction (see (a) and (c) of FIG. 10 ).
  • the recess 620 is provided on the outer peripheral surface of the annular sliding portion 231 of the piston 230 so as to be continuously cut from the upper end to the base end in a long shape.
  • the projection 610 is formed in a semi-circular semi-cylindrical shape in a plan view, and is formed so that the projection 610 fits with play.
  • FIG. 14 is a perspective view showing a state in which the outer collar 260 and the inner collar 240 are fastened and fixed to the sensor body 250.
  • the annular sliding portion 231 of the piston 230 shown in FIG. 12 the protrusion 611 of the piston 23, and the concave portion of the outer collar 260. 621 is inserted in a phase in which it engages.
  • a protrusion 611 is provided on the outer peripheral surface of the annular sliding portion 231 of the piston 230 of the above-described modification 1, and a protrusion 613 is provided on the inner peripheral surface thereof, and as shown in FIG.
  • the inner peripheral surface of the collar 260 and the outer peripheral surface of the inner collar 240 may be provided with recesses 621 and 625 corresponding to the protrusions 611 and 613, respectively.
  • the protrusions 611 on the outer peripheral surface and the protrusions 613 on the inner peripheral surface of the piston 230 are provided at a plurality of positions (four peripheral positions as an example in FIG. 15) along the circumferential direction of the annular sliding portion 231 at equal intervals. Be done. Further, the protrusions 611 and 613 are arranged so that the phases thereof coincide with each other in the circumferential direction. Similarly, the concave portion 621 of the outer collar 260 and the concave portion 625 of the inner collar 240 are provided at a plurality of positions along the circumferential direction, respectively, and are in phase with each other in the circumferential direction. That is, the pair of protrusions 611 and 613 and the pair of recesses 621 and 625 arranged at the same circumferential position are arranged along the same radial direction.
  • the annular sliding portion 231 of the piston 230 is inserted into the annular space area A1 between the inner collar 240 and the outer collar 260, and the pair of protrusions 611 at each of the above-described circumferential positions and the circumferential position corresponding thereto.
  • the pair of concave portions 621 arranged in the above are engaged with each other. According to this configuration, the generated rotational torque is evenly distributed to each set of the pair of protrusions 611 and the pair of recesses 621 at a plurality of circumferential positions, and wear due to engagement can be suppressed. Further, even when the axial load is applied along with the bending load, the axial displacement is unlikely to occur, and stable support is possible.
  • ⁇ Third embodiment> 17 to 21 show a third embodiment of the present invention.
  • the protrusion 610 forming the relative rotation blocking portion 600 is provided on the inner circumference of the piston 230, and the recess 620 is formed on the inner circumference of the inner collar 240 as shown in FIG. It is one embodiment provided. Since the present embodiment has a characteristic part different from that of the first embodiment in the configuration of the relative rotation blocking part 600, only the description of the relative rotation blocking part 600 will be described, and the description of the other components will be the description of the first embodiment. The description here is omitted.
  • the projecting portion 610 is continuously projecting from the inner peripheral end of the upper surface of the annular base portion 232 forming the piston 230 upward in the vertical direction with a predetermined height.
  • the projections are formed in prismatic shapes that project in a rectangular shape in plan view (see FIG. 19).
  • the height of the protrusion 610 in the vertical direction is formed to be about 1/4 of the height of the annular sliding portion 231 (FIGS. 17 to 19 and 21).
  • four protrusions 610 are provided at equal intervals (every 90 degrees) in the circumferential direction (see (a) and (c) of FIG. 19 ).
  • the recess 620 is provided at the inner peripheral edge of the bottom surface of the inner collar so as to be cut out over the inner peripheral surface. In the present embodiment, it is recessed in a rectangular rectangular tube shape in a plan view, and is formed to such an extent that the protrusion 610 fits with play.
  • the piston 230 is provided with the protrusion 610 on the inner circumference of the annular sliding portion 231, the recess 620 on the outer circumference, and the recess 620 on the outer circumference of the inner collar 240, and the inner circumference of the outer collar 260. It is also possible to adopt a form in which the protrusion 610 is provided on the.
  • the relative rotation prevention part (concavo-convex structure) 600 of the first embodiment and the relative rotation prevention part (concavo-convex structure) 600 of the third embodiment together.
  • the relative rotation prevention part (concavo-convex structure) 600 of the second embodiment and the relative rotation prevention part (concavo-convex structure) 600 of the third embodiment together. Then, the relative rotation prevention part (concavo-convex structure) 600 of the first embodiment, the relative rotation prevention part (concave structure) 600 of the second embodiment, and the relative rotation prevention part (concave structure) 600 of the third embodiment, It is also possible to adopt together.
  • a protrusion is provided on one of the upper surface of the annular base portion 232 of the piston 230 and the bottom surface of the inner collar 240 or the bottom surface of the outer collar 260 that opposes the upper surface, and a concave portion (the concave portion where the protrusion fits on the other) It is also possible to provide a hole) and prevent the relative rotation of the moving body and the mounting body by fitting the projection and the recess, which is within the scope of the present invention. Further, both the inner collar 240 and the outer collar 260 may be provided with recesses or protrusions that fit into the protrusions or recesses provided on the piston 230 side, and this is within the scope of the present invention.
  • the vehicle weight measuring device of the present invention can be used as a suspension device on the rear wheel side of an automobile and is within the scope of the present invention.
  • a well-known suspension device in which the attachment body is attached to the arm side of the suspension device is assumed, and either the protrusion or the recess portion is provided in the collar forming the attachment body side, and the recess portion or the protrusion portion into which the protrusion portion or the recess portion fits. Either of them should be installed on the piston side.
  • the present invention can be adopted not only in the form of being incorporated in the suspension device on the front wheel side but also in the form of being incorporated in the suspension device on the rear wheel side, and can also be adopted in various forms of suspension devices.
  • Weight measuring device 210 Pad 220 Diaphragm 230 Piston (moving body) 240 Inner Collar 260 Outer Collar 280 Holding Structure 290 Oil Chamber 300 Pressure Sensor 600 Relative Rotation Blocking Part 610, 611, 613 Protrusion (engaging part) 620, 621, 625 Recessed part (engaged part) 700 coil spring

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid-Damping Devices (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

La présente invention concerne un appareil de mesure de poids de véhicule comprenant : un corps mobile qui se déplace au moyen de la force de répulsion d'un ressort ; une fixation qui est fixée à un côté véhicule ou à un côté bras d'un dispositif de suspension ; et un coussinet qui est disposé entre le corps mobile et l'accessoire. La fixation comprend un diaphragme, une chambre d'huile dans laquelle une pression interne peut être changée par pression du diaphragme, et un capteur de pression qui peut détecter le changement de pression dans la chambre d'huile. Des parties de prévention de rotation relative sont fournies au corps mobile et à la fixation. Les parties de prévention de rotation relative comportent une partie de projection qui est disposée sur l'un du corps mobile et de la fixation, et une partie d'évidement qui est fournie à l'autre et dans laquelle la partie de projection s'insère.
PCT/JP2019/047494 2018-12-04 2019-12-04 Appareil de mesure de poids de véhicule WO2020116535A1 (fr)

Priority Applications (1)

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JP2020559987A JPWO2020116535A1 (ja) 2018-12-04 2019-12-04 車両の重量測定装置

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JP2018-227066 2018-12-04
JP2018227066 2018-12-04

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WO2020116535A1 true WO2020116535A1 (fr) 2020-06-11

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018009980A (ja) * 2016-06-29 2018-01-18 日本精工株式会社 車両の重量測定装置
WO2018016481A1 (fr) * 2016-07-19 2018-01-25 日本精工株式会社 Dispositif de mesure de poids de véhicule

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018009980A (ja) * 2016-06-29 2018-01-18 日本精工株式会社 車両の重量測定装置
WO2018016481A1 (fr) * 2016-07-19 2018-01-25 日本精工株式会社 Dispositif de mesure de poids de véhicule

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