WO2022050215A1 - 緩衝器 - Google Patents
緩衝器 Download PDFInfo
- Publication number
- WO2022050215A1 WO2022050215A1 PCT/JP2021/031708 JP2021031708W WO2022050215A1 WO 2022050215 A1 WO2022050215 A1 WO 2022050215A1 JP 2021031708 W JP2021031708 W JP 2021031708W WO 2022050215 A1 WO2022050215 A1 WO 2022050215A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- spring seat
- spring
- shock absorber
- rib
- Prior art date
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 58
- 230000035939 shock Effects 0.000 title claims abstract description 58
- 230000002093 peripheral effect Effects 0.000 claims abstract description 63
- 239000000725 suspension Substances 0.000 claims abstract description 37
- 238000003780 insertion Methods 0.000 claims description 22
- 230000037431 insertion Effects 0.000 claims description 22
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 description 59
- 238000005266 casting Methods 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- 238000013016 damping Methods 0.000 description 5
- 238000002788 crimping Methods 0.000 description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G3/00—Resilient suspensions for a single wheel
- B60G3/02—Resilient suspensions for a single wheel with a single pivoted arm
- B60G3/04—Resilient suspensions for a single wheel with a single pivoted arm the arm being essentially transverse to the longitudinal axis of the vehicle
- B60G3/06—Resilient suspensions for a single wheel with a single pivoted arm the arm being essentially transverse to the longitudinal axis of the vehicle the arm being rigid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
- B60G13/02—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally
- B60G13/06—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/062—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
- B60G15/063—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper characterised by the mounting of the spring on the damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/10—Independent suspensions
- B60G2200/14—Independent suspensions with lateral arms
- B60G2200/142—Independent suspensions with lateral arms with a single lateral arm, e.g. MacPherson type
Definitions
- the present invention relates to a shock absorber.
- This application claims priority based on Japanese Patent Application No. 2020-148890 filed in Japan on September 4, 2020, the contents of which are incorporated herein by reference.
- a shock absorber having a structure in which a fitting portion is formed in a cylinder, a metal sheet is fitted in the fitting portion, and a resin sheet is placed on the metal sheet is known (see, for example, Patent Document 1). Further, a shock absorber having a strut in which an inner portion made of metal and an outer portion made of a composite material including a sheet are integrally molded is known (see, for example, Patent Document 2).
- the present invention provides a shock absorber that can suppress an increase in cost.
- the shock absorber includes a bottomed cylindrical cylinder, a spring seat, and ribs.
- the spring seat is integrally formed with the cylinder.
- the spring seat projects from the cylinder in the radial direction of the cylinder to support the suspension spring.
- the rib is integrally formed with the cylinder and the spring seat.
- the rib connects the outer peripheral portion of the spring seat and the cylinder.
- the rib is provided with a surface portion at the outer end portion in the radial direction of the cylinder.
- shock absorber According to the above-mentioned shock absorber, the cost increase can be suppressed.
- FIG. 1 is a diagram schematically showing a part of a vehicle 1 including the shock absorber 10 of the first embodiment.
- the vehicle 1 has a wheel 2, an axle 3, a knuckle 4, a shock absorber 10 of the first embodiment, and a suspension spring 6.
- the axle 3 rotates integrally with the wheel 2.
- the knuckle 4 rotatably supports the axle 3.
- One end of the shock absorber 10 is connected to the knuckle 4, and the other end is connected to the vehicle body 5.
- the suspension spring 6 is arranged between the shock absorber 10 and the vehicle body 5.
- the shock absorber 10 is arranged between the vehicle body 5 and the axle 3.
- the shock absorber 10 is a shock absorber used in an automobile suspension device. Specifically, the shock absorber 10 is a shock absorber used for a strut type suspension of an automobile.
- the shock absorber 10 has a bottomed cylindrical outer member 11 and a spring receiving member 12 attached to the outer member 11. Further, as shown in FIG. 4, the shock absorber 10 has a bottomed cylindrical inner member 13 provided inside the outer member 11.
- a reservoir chamber 14 is located between the outer member 11 and the inner member 13.
- a working liquid as a working fluid is sealed inside the inner member 13.
- the reservoir chamber 14 is filled with a working liquid and a working gas as working fluids.
- the outer member 11 is an integrally molded product integrally formed seamlessly.
- the outer member 11 is made of a metal whose shape is given by heat or force. Specifically, the outer member 11 is formed from an aluminum alloy by casting.
- the outer member 11 has a bottomed cylindrical outer cylinder 17 (cylinder), a pair of main brackets 18, a support bracket 19, and a spring seat 20.
- the pair of main brackets 18 extend outward from the outer cylinder 17 in the radial direction of the outer cylinder 17.
- the support bracket 19 extends outward from the outer cylinder 17 in the radial direction of the outer cylinder 17.
- the spring seat 20 extends outward from the outer cylinder 17 in the radial direction of the outer cylinder 17. As shown in FIGS.
- the outer member 11 has a plurality of, specifically, three reinforcing ribs 22 to 24 and one mold release rib 25 (rib). ..
- these outer cylinders 17, a pair of main brackets 18, support brackets 19, spring seats 20, reinforcing ribs 22 to 24, and mold release ribs 25 are seamlessly integrally formed by casting.
- the spring seat 20 is integrally formed with the outer cylinder 17, and the mold release rib 25 is integrally formed with the outer cylinder 17 and the spring seat 20.
- the outer cylinder 17 has a cylindrical side wall portion 31, a bottom portion 32, a protruding portion 33, and an opening 35.
- the bottom portion 32 closes one end side of the side wall portion 31 in the axial direction.
- the projecting portion 33 projects inward in the radial direction of the side wall portion 31 from the bottom portion 32 side in the axial direction of the inner peripheral surface of the side wall portion 31.
- the opening 35 is located on the side opposite to the axial bottom portion 32 of the side wall portion 31. Therefore, the outer cylinder 17 has an opening 35 on one end side in the axial direction and a bottom portion 32 on the other end side in the axial direction.
- a plurality of protruding portions 33 are formed intermittently at intervals in the circumferential direction of the outer cylinder 17.
- the direction in which the central axis of the outer cylinder 17 extends is the cylinder axial direction.
- the direction orthogonal to the central axis of the outer cylinder 17 is defined as the cylinder radial direction.
- the circumferential direction around the central axis of the outer cylinder 17 is defined as the cylinder circumferential direction.
- the pair of main brackets 18 are provided on the bottom portion 32 side of the side wall portion 31 of the outer cylinder 17.
- the pair of main brackets 18 extend outward in the cylinder radial direction from positions where the outer cylinders 17 are separated from each other in the cylinder circumferential direction.
- the pair of main brackets 18 have a plate shape and are substantially parallel to each other.
- the pair of main brackets 18 extend from the outer cylinder 17 to the same side in the cylinder radial direction.
- Each of the pair of main brackets 18 extends along the cylinder axial direction and along the cylinder radial direction.
- the knuckle 4 shown in FIG. 1 is arranged between the pair of main brackets 18.
- the pair of main brackets 18 are fixed to the knuckle 4 with fasteners 40.
- each main bracket 18 is formed with two insertion holes 41 into which fasteners 40 for attachment to the knuckle 4 are inserted.
- the support bracket 19 is provided on a portion of the side wall portion 31 of the outer cylinder 17 opposite to the bottom portion 32 of the pair of main brackets 18 in the cylinder axial direction.
- the support bracket 19 extends outward from the outer cylinder 17 in the radial direction of the cylinder.
- the support bracket 19 has a plate shape.
- the support bracket 19 extends along the cylinder axial direction and along the cylinder radial direction.
- the support bracket 19 is provided so as to be substantially 90 ° out of phase with the center position in the cylinder circumferential direction between the pair of main brackets 18 in the cylinder circumferential direction.
- the support bracket 19 is a portion that supports the stabilizer (not shown).
- the support bracket 19 is formed with one mounting hole 43. A connector (not shown) for connecting the stabilizer is attached to the mounting hole 43.
- the spring seat 20 is provided on a portion of the side wall portion 31 of the outer cylinder 17 opposite to the bottom portion 32 of the support bracket 19 in the cylinder axial direction.
- the spring seat 20 projects outward from the outer cylinder 17 in the cylinder radial direction.
- the spring seat 20 has a circular flat plate shape.
- the spring seat 20 has a circular outer peripheral end face 51.
- the spring seat 20 extends outward in the radial direction of the cylinder from the entire circumference of the side wall portion 31 in the circumferential direction of the cylinder.
- the central axis of the spring seat 20 is inclined and intersects with the central axis of the outer cylinder 17.
- the spring seat 20 In the cylinder radial direction passing through the central axis of the outer cylinder 17 and the center position of the pair of main brackets 18 in the cylinder circumferential direction, the spring seat 20 is closer to the outside of the extension direction of the pair of main brackets 18 in the cylinder axial direction. It is tilted away from the bottom 32.
- the spring seat 20 In the cylinder radial direction, the spring seat 20 is inclined so as to be closer to the bottom portion 32 in the cylinder axial direction toward the outside opposite to the extending direction of the pair of main brackets 18.
- the spring seat 20 has a first portion that is on the same side in the direction in which the pair of main brackets 18 extend from the outer cylinder 17 and the cylinder circumferential direction, and a second portion that is on the opposite side.
- the spring seat 20 is inclined so that the first portion thereof is separated from the bottom portion 32 in the cylinder axial direction with respect to the second portion.
- the outer peripheral end surface 51 of the spring seat 20 has a first portion on the same side as the direction in which the pair of main brackets 18 extend from the outer cylinder 17 in the cylinder circumferential direction, and a second portion on the opposite side. Have. In the outer peripheral end surface 51 of the spring seat 20, the first portion has a longer cylinder radial distance from the central axis of the outer cylinder 17 than the second portion. The outer peripheral end surface 51 of the spring seat 20 has the longest distance in the cylinder radial direction from the central axis of the outer cylinder 17 at a position where the central position in the cylinder circumferential direction and the phase in the cylinder circumferential direction are matched between the pair of main brackets 18. ing.
- the outer peripheral end surface 51 has the shortest distance in the cylinder radial direction from the central axis of the outer cylinder 17 at a position where the phase between the pair of main brackets 18 in the cylinder circumferential direction and the phase in the cylinder circumferential direction are different by 180 °. ing.
- the spring seat 20 has a support surface 55 and two parting lines 56 and 57.
- the support surface 55 faces the opening 35 side in the cylinder axial direction.
- the two parting lines 56 and 57 slightly project from the support surface 55 toward the opening 35 in the cylinder axial direction.
- the support surface 55 is inclined in the cylinder radial direction passing through the central axis of the outer cylinder 17 and the center position of the pair of main brackets 18 in the cylinder circumferential direction. That is, in the cylinder radial direction, the support surface 55 is inclined so as to be separated from the bottom portion 32 in the cylinder axial direction toward the outside of the extension direction of the pair of main brackets 18.
- the support surface 55 is inclined so as to be closer to the bottom portion 32 in the cylinder axial direction toward the outside opposite to the extending direction of the pair of main brackets 18.
- the two parting lines 56 and 57 are both linear extending in the radial direction of the cylinder.
- the two parting lines 56 and 57 are arranged on the same straight line.
- the two parting lines 56 and 57 are both formed on a radial line passing through the centers of both the spring seat 20 and the outer cylinder 17.
- One parting line 56 is arranged between the pair of main brackets 18 at a position where the central position in the cylinder circumferential direction and the phase in the cylinder circumferential direction match.
- the other parting line 57 is arranged at a position where the phase in the center position and the cylinder circumferential direction are different by 180 °. As shown in FIG.
- the parting lines 56 and 57 are inclined in the cylinder radial direction passing through the central axis of the outer cylinder 17 and the center position of the pair of main brackets 18 in the cylinder circumferential direction. is doing. That is, in the cylinder radial direction, the parting lines 56 and 57 are inclined so as to be separated from the bottom portion 32 in the cylinder axial direction toward the outside of the pair of main brackets 18 in the extending direction. The parting lines 56 and 57 are inclined so as to be closer to the bottom 32 in the cylinder axial direction toward the outside opposite to the extending direction of the pair of main brackets 18.
- the support surface 55 has a pair of planar slopes 58 and 59.
- the pair of slopes 58, 59 are inclined so that the height of the spring seat 20 in the axial direction becomes lower as the distance from the parting lines 56, 57 increases.
- parting lines 56 and 57 are provided at the boundary positions of the pair of slopes 58 and 59.
- the slopes 58 and 59 are inclined in the cylinder radial direction passing through the central axis of the outer cylinder 17 and the center position of the pair of main brackets 18 in the cylinder circumferential direction.
- the slopes 58 and 59 are inclined so as to be separated from the bottom portion 32 in the cylinder axial direction toward the outside of the pair of main brackets 18 in the extending direction.
- the slopes 58 and 59 are inclined so as to be closer to the bottom 32 in the cylinder axial direction toward the outside opposite to the extending direction of the pair of main brackets 18.
- the spring seat 20 is formed with a plurality of, specifically, four fitting holes 61, 62, 63, 64 at positions slightly inside the outer peripheral end surface 51 in the cylinder radial direction.
- the fitting holes 61, 62, 63, 64 are arranged in this order at a pitch of 90 ° in the circumferential direction of the spring seat 20.
- the fitting holes 61 and 62 are provided on the same side as the parting line 56 with respect to the outer cylinder 17 in the radial direction of the spring seat 20.
- the fitting holes 63 and 64 are provided on the same side as the parting line 57 with respect to the outer cylinder 17 in the radial direction of the spring seat 20.
- the fitting hole 61 is arranged on the support bracket 19 side in the cylinder circumferential direction with respect to the parting line 56.
- the fitting hole 62 is arranged on the side opposite to the support bracket 19 in the cylinder circumferential direction with respect to the parting line 56.
- the fitting hole 63 is arranged on the side opposite to the support bracket 19 in the cylinder circumferential direction with respect to the parting line 57.
- the fitting hole 64 is arranged on the support bracket 19 side in the cylinder circumferential direction with respect to the parting line 57.
- the spring receiving member 12 is attached to such a spring seat 20.
- the spring seat 20 of the outer member 11 supports the suspension spring 6 shown in FIG. 1 via the spring receiving member 12.
- the reinforcing ribs 22 to 24 and the mold release rib 25 shown in FIGS. 2 to 5 both reinforce the spring seat 20.
- the parting lines 56 and 57 are arranged on the support surface 55.
- the reinforcing ribs 22 to 24 and the mold release rib 25 are formed on the side opposite to the support surface 55 side.
- the reinforcing ribs 22 to 24 and the mold release rib 25 are the reinforcing rib 22, the mold release rib 25, the reinforcing rib 23, and the reinforcing rib 24 in the circumferential direction of the spring seat 20. They are arranged in order at a pitch of 90 °.
- the reinforcing rib 22 is arranged between the pair of main brackets 18 at a position where the central position in the cylinder circumferential direction and the phase in the cylinder circumferential direction match. Therefore, the reinforcing rib 22 is arranged at a position where the parting line 56 and the cylinder peripheral direction are in phase with each other.
- the spring seat 20 has a base surface 71 facing the bottom 32 side in the cylinder axial direction. The reinforcing rib 22 projects from the base surface 71 of the spring seat 20 toward the bottom portion 32 in the cylinder axial direction.
- the reinforcing rib 22 connects a position slightly inside the spring seat 20 in the radial direction with respect to the outer peripheral end surface 51 of the spring seat 20 and the outer peripheral portion of the outer cylinder 17.
- the reinforcing rib 22 extends from the outer peripheral surface of the outer cylinder 17 to the front of the outer peripheral end surface 51 of the spring seat 20.
- the reinforcing rib 22 is formed on a radial line passing through the center of the spring seat 20.
- the reinforcing rib 22 is formed on a radial line passing through the center of the outer cylinder 17.
- the reinforcing rib 22 protrudes from the base surface 71 so that the amount of protrusion from the base surface 71 increases toward the outer cylinder 17 side in the radial direction of the spring seat 20.
- the reinforcing rib 22 has an outer end edge portion 72 facing the bottom portion 32 side in the cylinder axial direction.
- the outer edge portion 72 of the reinforcing rib 22 has an arc shape.
- the reinforcing rib 23 shown in FIG. 3 is arranged at a position where the phase between the pair of main brackets 18 in the cylinder circumferential direction and the phase in the cylinder circumferential direction differ by 180 °. Therefore, as shown in FIG. 4, the reinforcing rib 23 is arranged at a position where the parting line 57 and the cylinder circumferential phase are in phase with each other. The reinforcing rib 23 projects from the base surface 71 of the spring seat 20 toward the bottom portion 32 in the cylinder axial direction.
- the reinforcing rib 23 connects a position slightly inside the spring seat 20 in the radial direction with respect to the outer peripheral end surface 51 of the spring seat 20 and the outer peripheral portion of the outer cylinder 17. In other words, the reinforcing rib 23 extends from the outer peripheral surface of the outer cylinder 17 to the front of the outer peripheral end surface 51 of the spring seat 20.
- the reinforcing rib 23 is formed on a radial line passing through the center of the spring seat 20. Further, the reinforcing rib 23 is formed on a radial line passing through the center of the outer cylinder 17.
- the reinforcing rib 23 protrudes from the base surface 71 so that the amount of protrusion from the base surface 71 increases toward the outer cylinder 17 side in the radial direction of the spring seat 20.
- the reinforcing rib 23 has an outer end edge portion 73 facing the bottom portion 32 side in the cylinder axial direction.
- the outer edge portion 73 of the reinforcing rib 23 has an arc shape.
- the reinforcing rib 24 is formed on the support bracket 19 side in the cylinder circumferential direction between the reinforcing ribs 22 and 23.
- the reinforcing rib 24 is formed slightly closer to the reinforcing rib 22 than the support bracket 19 in the cylinder circumferential direction.
- the reinforcing ribs 24 are provided slightly offset from the central axis of the outer cylinder 17 toward the pair of main brackets 18 in the cylinder radial direction passing through the central position between the pair of main brackets 18.
- the reinforcing rib 24 projects from the base surface 71 of the spring seat 20 toward the bottom portion 32 in the cylinder axial direction.
- the reinforcing rib 24 connects a position slightly inside the spring seat 20 in the radial direction with respect to the outer peripheral end surface 51 of the spring seat 20 and the outer peripheral portion of the outer cylinder 17.
- the reinforcing rib 24 extends from the outer peripheral surface of the outer cylinder 17 to the front of the outer peripheral end surface 51 of the spring seat 20.
- the reinforcing rib 24 is formed on a radial line passing through the center of the spring seat 20.
- the reinforcing rib 24 protrudes from the base surface 71 so that the amount of protrusion from the base surface 71 increases toward the outer cylinder 17 side in the radial direction of the spring seat 20.
- the reinforcing rib 24 has an outer end edge portion 74 facing the bottom portion 32 side in the cylinder axial direction.
- the outer edge portion 74 of the reinforcing rib 24 has an arc shape. As shown in FIG. 6, the reinforcing rib 24 overlaps the slope 59 in the circumferential direction of the spring seat 20.
- Each reinforcing rib 22 to 24 has an end portion located at the end position on the outer cylinder 17 side and located on the bottom 32 side in the cylinder axial direction. The ends of the reinforcing ribs 22 to 24 are arranged at substantially the same position in the cylinder axial direction.
- Each reinforcing rib 22-24 has a radial outer end of the spring seat 20. The ends of the reinforcing ribs 22 to 24 are arranged at positions substantially equidistant from the central axis of the spring seat 20. In other words, in the reinforcing ribs 22 to 24, the shortest distance from the outer peripheral end surface 51 of the outer end portion in the radial direction of the spring seat 20 is substantially the same.
- the mold release rib 25 is formed on the side opposite to the support bracket 19 in the cylinder circumferential direction between the reinforcing ribs 22 and 23.
- the release rib 25 is formed on the reinforcing rib 22 side of the position where the phase is 180 ° different from that of the support bracket 19 in the cylinder circumferential direction.
- the release rib 25 is provided slightly offset from the central axis of the outer cylinder 17 toward the pair of main brackets 18 in the cylinder radial direction passing through the central position between the pair of main brackets 18.
- the mold release rib 25 projects from the base surface 71 of the spring seat 20 toward the bottom portion 32 in the cylinder axial direction. As shown in FIG. 6, the mold release rib 25 overlaps the slope 58 in the circumferential direction of the spring seat 20.
- the mold release rib 25 connects the outer peripheral portion of the spring seat 20 and the outer peripheral portion of the outer cylinder 17.
- the mold release rib 25 extends from the outer peripheral surface of the outer cylinder 17 to the outer peripheral end surface 51 of the spring seat 20.
- the release rib 25 is formed on a radial line passing through the center of the spring seat 20.
- the release rib 25 is formed on the same diameter line passing through the center of the reinforcing rib 24 and the spring seat 20.
- the release rib 25 protrudes from the base surface 71 so that the amount of protrusion from the base surface 71 increases toward the outer cylinder 17 side in the radial direction of the spring seat 20.
- the mold release rib 25 has an outer end edge portion 75 facing the bottom portion 32 side in the cylinder axial direction.
- the outer end edge portion 75 of the release rib 25 has a planar shape.
- the mold release rib 25 is located at the end position on the outer cylinder 17 side and has the end on the bottom 32 side in the cylinder axial direction.
- the end portion of the release rib 25 is arranged on the side opposite to the bottom portion 32 in the cylinder axial direction with respect to the reinforcing ribs 22 to 24. As shown in FIG. 6, the mold release rib 25 extends in the direction perpendicular to the parting lines 56 and 57.
- the inner end portion in the radial direction of the spring seat 20 is connected to the outer peripheral surface of the outer cylinder 17.
- the release rib 25 is a surface portion 81 whose outer end portion in the radial direction of the spring seat 20 faces outward in the radial direction of the spring seat 20.
- the mold release rib 25 connects the outer peripheral end surface 51 of the outer peripheral portion of the spring seat 20 and the outer cylinder 17.
- the mold release rib 25 is provided with a surface portion 81 at the outer end portion in the cylinder radial direction.
- the surface portion 81 has a flat surface portion 82 and a pair of curved surface portions 83, 84.
- the flat surface portion 82 extends in the direction of the central axis of the outer cylinder 17.
- the pair of curved surface portions 83, 84 are provided between the flat surface portion 82 and the outer peripheral end surface 51 of the spring seat 20.
- the pair of curved surface portions 83, 84 smoothly connect the flat surface portion 82 to the outer peripheral end surface 51.
- the flat surface portion 82 is arranged so that the central position of the spring seat 20 in the circumferential direction is the same as the outer peripheral end surface 51 of the spring seat 20 in the cylinder radial direction.
- the flat surface portion 82 is connected to the outer peripheral end surface 51.
- the flat surface portion 82 extends in the tangential direction of the outer peripheral end surface 51 of the spring seat 20. In other words, the flat surface portion 82 extends perpendicular to the radial line passing through the central axis of the spring seat 20. The distance from the center of the spring seat 20 of the flat surface portion 82 is the same as the distance from the center of the spring seat 20 of the outer peripheral end surface 51.
- the flat surface portion 82 is a flat surface extending parallel to the parting lines 56 and 57 shown in FIG. 6 and parallel to the cylinder axial direction.
- the surface portion 81 has a circular mark 85 that is slightly recessed from the flat surface portion 82 inside the flat surface portion 82.
- the mark 85 is a mark generated when the outer member 11 is released from the casting mold during casting.
- the mark 85 may be distorted or the like in addition to the circular concave shape.
- the mark 85 is at least partially in the range inside the flat surface portion 82. More specifically, the mark 85 is entirely within the range inside the flat surface portion 82.
- the central axis of each of the fitting holes 61 to 64 is parallel to the central axis of the outer peripheral end surface 51 of the spring seat 20.
- the central axes of the fitting holes 61 to 64 are arranged on the same circle. This circle is a circle centered on the central axis of the outer peripheral end surface 51.
- the central axis of each of the fitting holes 61 to 64 is inclined with respect to the central axis of the outer cylinder 17.
- the fitting holes 61 and 62 on the side closer to the reinforcing rib 22 have the same distance from the central axis of the outer cylinder 17.
- the fitting holes 63 and 64 on the side closer to the reinforcing rib 23 have the same distance from the central axis of the outer cylinder 17.
- the distance from the center axis of the outer cylinder 17 of the fitting holes 61 and 62 is longer than the distance from the center axis of the outer cylinder 17 of the fitting holes 63 and 64.
- the outer member 11 is formed by casting except for four insertion holes 41, one mounting hole 43, four fitting holes 61 to 64, and the like. At that time, the outer member 11 is formed by a casting mold 100 which is divided into at least two parts in the radial direction of the cylinder, as schematically shown in FIG.
- the casting mold 100 has a first mold 101, a second mold 102, a third mold 103, and a fourth mold 104.
- the first mold 101 forms the outer half of the outer member 11 including the mold release rib 25.
- the second type 102 forms an outer half including a support bracket 19 and a reinforcing rib 24 of the outer member 11.
- the third type 103 forms an inner portion of the outer cylinder 17 of the outer member 11.
- the fourth type 104 forms a space between the pair of main brackets 18.
- the reinforcing ribs 22 and 23 are formed by the first type 101 and the second type 102 on the mating surface side of the first type 101 and the second type 102. Further, the above-mentioned parting lines 56 and 57 are formed by the mating surfaces of the first type 101 and the second type 102.
- the first type 101 is provided with a plurality of release pins 111 and 112.
- the plurality of mold release pins 111 and 112 push the outer member 11 upward in a state where the second mold 102, the third mold 103 and the fourth mold 104 are separated from the outer member 11.
- the plurality of release pins 111 and 112 rise at the same time.
- one release pin 111 comes into contact with the surface portion 81 of the release rib 25 of the outer member 11, and the other release pin 112 is on the bottom 32 side of the side wall portion 31 of the outer cylinder 17 of the outer member 11.
- Contact a predetermined position As a result, the outer member 11 is pushed upward. At that time, the outer member 11 is not completely solidified.
- the surface portion 81 is recessed at the tip end portion of the columnar mold release pin 111 to form a circular mark 85 as shown in FIGS. 3 to 5.
- the pair of slopes 58, 59 of the spring seat 20 shown in FIG. 6 is a draft for easily pulling out the outer member 11 from the first mold 101 and the second mold 102.
- the spring receiving member 12 has a substantially perforated disk shape.
- the spring receiving member 12 is seamlessly integrally molded with a resin material.
- this resin material include PA (polyamide synthetic resin) and PPS (polyphenylene sulfide resin). These resin materials are used according to the required strength and the usage environment.
- the spring receiving member 12 has a perforated circular flat plate-shaped suspension spring receiving portion 122 and a protruding wall portion 123.
- the suspension spring receiving portion 122 is formed with a circular insertion hole 121 on the inner peripheral side.
- the protruding wall portion 123 projects from the outer peripheral edge portion of the suspension spring receiving portion 122 to one side in the axial direction of the suspension spring receiving portion 122.
- the protruding wall portion 123 is not formed on the entire circumference of the suspension spring receiving portion 122, and a part thereof is a notch portion 124.
- the protruding wall portion 123 is continuous in the circumferential direction of the spring receiving member 12 except for the notch portion 124.
- the protruding wall portion 123 has a substantially conical shape whose diameter becomes larger as the distance from the suspension spring receiving portion 122 in the axial direction increases.
- the suspension spring receiving portion 122 has a spring receiving surface 125 on the side on which the protruding wall portion 123 protrudes.
- the spring receiving surface 125 is a flat surface.
- the suspension spring receiving portion 122 has a concave portion 132 on the side of the insertion hole 121 in the radial direction opposite to the protruding wall portion 123 in the axial direction.
- the concave portion 132 is recessed toward the protruding wall portion 123 in the axial direction with respect to the surrounding peripheral plate portion 131.
- the concave portion 132 has a bottom surface 133 (opposing surface) and an inner peripheral wall surface 134.
- the bottom surface 133 is located on the protruding wall portion 123 side in the axial direction.
- the inner peripheral wall surface 134 surrounds the entire circumference of the bottom surface 133.
- the inner peripheral wall surface 134 rises from the bottom surface 133 on the side opposite to the protruding wall portion 123 in the axial direction.
- linear concave portions 136 and 137 are formed in each of the concave portions 132.
- the recesses 136 and 137 are further recessed toward the protruding wall portion 123 in the axial direction of the spring receiving member 12 with respect to the bottom surface 133.
- the recess 136 in the circumferential direction of the spring receiving member 12, the recess 136 is 180 ° out of phase with the notch 124 at the center position of each other.
- the recess 137 is in phase with the notch 124 at the center position of each other.
- the recesses 136 and 137 are arranged on a radial line passing through the central axis of the spring receiving member 12.
- the recesses 136 and 137 are arranged on the same straight line.
- the bottom surface 133 is divided into two regions by forming recesses 136 and 137. Each of the two regions is a planar slope 138,139.
- the slopes 138 and 139 are slightly inclined so as to be located on the protruding wall portion 123 side in the axial direction of the spring receiving member 12 toward the recesses 136 and 137.
- the inner peripheral wall surface 134 of the concave portion 132 has a plurality of, specifically four small-diameter wall surfaces 141, 142, 143, 144, and a plurality, specifically four large-diameter wall surfaces 151, 152, 153, 154. ,have.
- the four small diameter wall surfaces 141, 142, 143, 144 are arranged on the same conical surface.
- the four large-diameter wall surfaces 151, 152, 153, 154 are arranged on the same conical surface.
- the inner peripheral wall surface 134 has a small diameter wall surface 141, a large diameter wall surface 151, a small diameter wall surface 142, a large diameter wall surface 152, a small diameter wall surface 143, a large diameter wall surface 153, a small diameter wall surface 144, and a large diameter wall surface 154 in the circumferential direction of the spring receiving member 12. They are arranged in this order.
- the four small diameter walls 141 to 144 have the same shape.
- the four large-diameter wall surfaces 151 to 154 have the same shape.
- the inner diameters of the small-diameter wall surfaces 141 to 144 are smaller toward the bottom surface 133 side.
- the inner diameters of the large-diameter wall surfaces 151 to 154 are also smaller toward the bottom surface 133 side.
- the minimum inner diameter of the small diameter walls 141 to 144 is smaller than the minimum inner diameter of the large diameter walls 151 to 154.
- the minimum inner diameter of the small diameter wall surfaces 141 to 144 is equivalent to the outer diameter of the spring seat 20 of the outer member 11, that is, the diameter of the outer peripheral end surface 51.
- one of the small diameter wall surfaces 141 to 144, the small diameter wall surface 144 is in phase with the notch portion 124 at the center position of each other.
- the other small-diameter wall surface 142 of the small-diameter wall surfaces 141 to 144 is 180 ° out of phase with the notch 124 at the center position of each other.
- the remaining two small-diameter wall surfaces 141 and 143 of the small-diameter wall surfaces 141 to 144 are 90 ° out of phase with the cutout portion 124 at the center position of the spring receiving member 12 in the circumferential direction.
- the small-diameter wall surface 142 is in phase with the recess 136 at the center position of each other.
- the small diameter wall surface 144 is in phase with the recess 137 at the center position of each other.
- the recess 136 extends from the insertion hole 121 to a position beyond the small diameter wall surface 142 in the radial direction of the spring receiving member 12.
- the recess 136 further extends through the small diameter wall surface 142 in the axial direction of the spring receiving member 12.
- the recess 137 extends from the insertion hole 121 to a position beyond the small diameter wall surface 144 in the radial direction of the spring receiving member 12.
- the recess 137 further penetrates the small diameter wall surface 144 in the axial direction of the spring receiving member 12 and extends.
- the fitting projection 161 is provided so that the large-diameter wall surface 151 and the center position of each other are in phase with each other.
- the fitting projection 162 is provided so that the large-diameter wall surface 152 and the large-diameter wall surface 152 are in phase with each other at the center positions.
- the fitting projection 163 is provided so that the large-diameter wall surface 153 and the center position of each other are in phase with each other.
- the fitting projection 164 is provided so that the large-diameter wall surface 154 and the center position of each other are in phase with each other.
- the fitting protrusions 161 to 164 project from the bottom surface 133 of the concave portion 132 to the side opposite to the protruding wall portion 123 in the axial direction of the spring receiving member 12.
- the fitting protrusions 161 to 164 have the same shape. As shown in FIG. 9, the fitting protrusions 161 to 164 have a columnar neck portion 171 protruding from the bottom surface 133, a tapered head portion 172, and a slit 173.
- the head 172 is on the opposite side of the bottom surface 133 of the neck 171.
- the head 172 has a larger diameter than the neck 171.
- the slit 173 bisects the neck 171 and the head 172 in the radial direction over the entire axial length.
- the spring receiving member 12 is placed on the support surface 55 of the spring seat 20.
- the bottom surface 133 of the concave portion 132 faces the support surface 55 of the spring seat 20 shown in FIG.
- the opening 35 side of the outer cylinder 17 of the outer member 11 is inserted into the insertion hole 121 on the inner peripheral side with respect to the spring seat 20.
- the spring seat 20 is arranged in the concave portion 132.
- the fitting protrusion 161 is fitted into the fitting hole 61 while being deformed so as to narrow the slit 173, and the head portion 172 protrudes from the base surface 71 to return to the original position. As a result, the head 172 is locked to the base surface 71.
- the fitting protrusion 162 is fitted into the fitting hole 62
- the fitting protrusion 163 is fitted into the fitting hole 63
- the fitting protrusion 164 is fitted into the fitting hole 64.
- the spring receiving member 12 sandwiches the spring seat 20 between the suspension spring receiving portion 122 and the head portions 172 of the fitting protrusions 161 to 164.
- the spring receiving member 12 is attached to the spring seat 20.
- the spring sheet 20 is fitted on the outer peripheral end surface 51 inside the small diameter wall surfaces 141 to 144 of the concave portion 132.
- the parting line 56 protruding from the support surface 55 of the spring seat 20 is fitted and accommodated in the recess 136 provided in the bottom surface 133.
- the bottom surface 133 is a surface of the spring receiving member 12 facing the spring seat 20.
- the parting line 57 protruding from the support surface 55 of the spring seat 20 is fitted and accommodated in the recess 137 also provided in the bottom surface 133.
- the spring receiving member 12 is fixed to the outer member 11 in the cylinder axial direction by fitting the fitting protrusions 161 to 164 into the fitting holes 61 to 64. Further, in the spring receiving member 12, the slope 138 and the slope 58 come into contact with each other by surface contact, and the slope 139 and the slope 59 come into contact with each other by surface contact. At the same time, the parting line 56 is fitted into the recess 136, and the parting line 57 is fitted into the recess 137. As a result, the spring receiving member 12 is fixed to the outer member 11 in the cylinder circumferential direction. In other words, the spring receiving member 12 is prevented from rotating with respect to the outer member 11.
- the spring sheet 20 is fitted on the outer peripheral end surface 51 inside the small diameter wall surfaces 141 to 144 of the concave portion 132. As a result, the spring receiving member 12 is fixed in the in-plane direction with respect to the outer member 11.
- the spring receiving member 12 attached to the spring seat 20 is fixed to the spring seat 20 without rattling in any direction.
- the notch 124 aligns the phase of the reinforcing rib 23 with the reinforcing rib 23 at the center position in the cylinder circumferential direction.
- the fitting protrusions 161 to 164 of the spring receiving member 12 are arranged on the same circle centered on the central axis of the insertion hole 121.
- the fitting holes 61 to 64 of the spring seat 20 are arranged so as to be offset from the central axis of the outer cylinder 17. Therefore, in the spring receiving member 12 attached to the spring seat 20, the insertion hole 121 is eccentric with respect to the outer cylinder 17. Specifically, the insertion hole 121 is closest to the outer cylinder 17 at a position in phase with the center position of the notch portion 124 in the circumferential direction. The insertion hole 121 is farthest from the outer cylinder 17 at a position that is 180 ° out of phase with the center position of the notch 124. In other words, the center position of the insertion hole 121 of the spring receiving member 12 is eccentric to the reinforcing rib 22 side with respect to the outer cylinder 17.
- the spring receiving surface 125 of the suspension spring receiving portion 122 is located at the center of the outer cylinder 17 and the center of the pair of main brackets 18 in the cylinder circumferential direction. It is inclined in the radial direction of the cylinder passing through. That is, in the cylinder radial direction, the spring receiving surface 125 is inclined so as to be separated from the bottom portion 32 in the cylinder axial direction toward the outside in the extending direction of the pair of main brackets 18. The spring receiving surface 125 is inclined so as to be closer to the bottom portion 32 in the cylinder axial direction toward the outside opposite to the extending direction of the pair of main brackets 18.
- the spring receiving member 12 attached to the spring seat 20 accommodates the lower end of the suspension spring 6 which is a coil spring inside the protruding wall portion 123 in the radial direction.
- the spring receiving member 12 abuts on the lower end of the suspension spring 6 at the spring receiving surface 125 of the suspension spring receiving portion 122 and receives the spring receiving member 12.
- the inner member 13 is in contact with the bottom 32 of the outer member 11.
- the inner member 13 has a metal cylindrical inner cylinder 201 and a metal body 202.
- the body 202 is fitted to the inner cylinder 201 so as to close one end side of the inner cylinder 201 in the axial direction.
- the other end of the inner cylinder 201 on the opposite side of the body 202 is the opening 203.
- the outer peripheral portion of the body 202 has a stepped shape having a small diameter portion and a large diameter portion having a larger diameter.
- the end of the inner cylinder 201 opposite to the opening 203 is fitted to the small diameter portion of the body 202.
- the shock absorber 10 has a closing member 211.
- the closing member 211 closes the opening 203 of the inner member 13 and the opening 35 of the outer member 11.
- the closing member 211 includes an annular rod guide 212 and an annular sealing member 213.
- the rod guide 212 fits into both the side wall portion 31 of the outer cylinder 17 and the inner cylinder 201.
- the seal member 213 is arranged on the side opposite to the bottom portion 32 with respect to the rod guide 212.
- the seal member 213 fits into the side wall portion 31 of the outer cylinder 17.
- the outer peripheral portion of the rod guide 212 has a stepped shape having a small diameter portion and a large diameter portion having a larger diameter.
- the body 202 of the inner member 13 is fitted inside the plurality of protrusions 33 of the outer member 11 and is in contact with the bottom portion 32.
- the opening 203 of the inner member 13 fits into the small diameter portion of the outer peripheral portion of the rod guide 212.
- the large diameter portion of the outer peripheral portion of the rod guide 212 is fitted to the opening 35 side of the side wall portion 31 of the outer member 11.
- the inner member 13 is supported by the outer member 11 via the rod guide 212. In this state, the inner member 13 is coaxially arranged with respect to the outer member 11 and is positioned so as not to be movable in the radial direction.
- the outer member 11 has a crimping portion 215 formed at an end of the side wall portion 31 opposite to the bottom portion 32.
- the crimping portion 215 is cylindrical at the time of casting described above.
- the crimping portion 215 is plastically deformed inward in the radial direction by curling at the time of assembly.
- the inner member 13 is in contact with the bottom 32 of the outer member 11 in its body 202.
- the rod guide 212 fitted to the inner member 13 is positioned in the axial direction with respect to the outer member 11.
- the seal member 213 is sandwiched between the rod guide 212 thus positioned axially with respect to the outer member 11 and the crimping portion 215 of the outer member 11.
- the seal member 213 seals the opening 35 side of the outer member 11.
- the shock absorber 10 has a piston 220 provided in the inner cylinder 201 of the inner member 13.
- the piston 220 is slidably fitted in the inner cylinder 201.
- the piston 220 moves relative to the inner cylinder 201 in the axial direction.
- the piston 220 defines a first chamber 221 and a second chamber 222 in the inner member 13.
- the first chamber 221 is provided between the piston 220 and the rod guide 212 in the inner member 13.
- the second chamber 222 is provided between the piston 220 and the body 202 in the inner member 13.
- the second chamber 222 in the inner member 13 is defined as the reservoir chamber 14 by the body 202.
- the first chamber 221 and the second chamber 222 are filled with an oil liquid which is a working liquid.
- the reservoir chamber 14 is filled with a gas as a working gas and an oil liquid as a working liquid.
- the shock absorber 10 has a hollow rod 231.
- One end side of the rod 231 in the axial direction is arranged in the inner cylinder 201 and connected to the piston 220.
- the other end side of the rod 231 in the axial direction extends from the inner cylinder 201 and the outer cylinder 17 to the outside through the openings 203 and 35.
- the rod 231 moves relative to the inner cylinder 201 in the axial direction together with the piston 220.
- the rod 231 extends outward from the inner member 13 and the outer member 11 through the rod guide 212 and the seal member 213.
- the rod 231 is restricted in radial movement by the rod guide 212.
- the rod 231 moves in the axial direction integrally with the piston 220 with respect to the inner member 13 and the outer member 11.
- the seal member 213 closes between the outer member 11 and the rod 231. As a result, the seal member 213 regulates the leakage of the working liquid in the inner member 13 and the working gas and working liquid in the reservoir chamber 14 to the outside. As shown in FIG. 1, in the shock absorber 10, the rod 231 is connected to the vehicle body 5 side.
- the piston 220 is formed with a passage 241 penetrating in the axial direction and a passage (not shown). These passages 241 and passages (not shown) can communicate with the first chamber 221 and the second chamber 222.
- the shock absorber 10 has an annular disc valve 255 on the opposite side of the axial bottom 32 of the piston 220. The disc valve 255 can block the passage 241 by abutting on the piston 220. Further, the shock absorber 10 has an annular disc valve 256 on the axial bottom portion 32 side of the piston 220. The disc valve 256 can close the passage (not shown) by abutting on the piston 220.
- the piston 220 moves in the direction of narrowing the second chamber 222. Then, when the pressure in the second chamber 222 becomes higher than the pressure in the first chamber 221 by a predetermined value or more, the disc valve 255 opens the passage 241. At that time, the disc valve 255 generates a damping force.
- the rod 231 moves to the extension side that increases the amount of protrusion from the inner cylinder 201 and the outer cylinder 17, the piston 220 moves in the direction of narrowing the first chamber 221.
- the disc valve 256 opens a passage (not shown). At that time, the disc valve 256 generates a damping force. Therefore, the rod 231 and the piston 220 move relative to the inner cylinder 201 in the axial direction to generate a damping force.
- the body 202 of the inner member 13 is formed with a passage 261 and a passage 262 penetrating in the axial direction.
- the passage 261 and the passage 262 can communicate with the second chamber 222 and the reservoir chamber 14.
- the shock absorber 10 has an annular disc valve 275 and an annular disc valve 276.
- the disc valve 275 is located on the axial bottom 32 side of the body 202.
- the disc valve 275 can block the passage 261 by abutting on the body 202.
- the disc valve 276 is located on the opposite side of the axial bottom 32 of the body 202.
- the disc valve 276 can block the passage 262 by abutting on the body 202.
- the disc valve 275 opens the passage 261. At that time, the disc valve 275 generates a damping force.
- the disc valve 276 opens the passage 262. At that time, the disc valve 276 allows the working liquid to flow from the reservoir chamber 14 into the second chamber 222 without substantially generating a damping force. That is, the disc valve 276 is a suction valve.
- Patent Document 1 describes a shock absorber having a structure in which a fitting portion is formed in a cylinder, a metal sheet is fitted in the fitting portion, and a resin sheet is placed on the metal sheet.
- Patent Document 2 describes a shock absorber having a strut in which an inner portion made of metal and an outer portion made of a composite material including a sheet are integrally molded.
- the mold may cause galling of the spring seat, which may reduce the yield.
- the spring seat is thin, it is difficult to push the outer circumference thereof with a release pin. Therefore, it is necessary to perform mold release with more mold release pins. In this case, the maintenance cost of the release pin increases, and the running cost may increase.
- the shock absorber 10 of the first embodiment has a bottomed cylindrical outer cylinder 17, a spring seat 20, and a mold release rib 25.
- the spring seat 20 is integrally formed with the outer cylinder 17.
- the spring seat 20 projects from the outer cylinder 17 in the radial direction of the outer cylinder 17 to support the suspension spring 6.
- the release rib 25 is integrally formed with the outer cylinder 17 and the spring seat 20.
- the release rib 25 connects the outer peripheral portion of the spring seat 20 and the outer cylinder 17.
- the mold release rib 25 is provided with a surface portion 81 at the outer end portion in the radial direction of the outer cylinder 17.
- the surface portion 81 of the mold release rib 25 can be pressed by the mold release pin 111 to remove the outer member 11 from the first mold 101. Therefore, even if the spring seat 20 is thin, the spring seat 20 can be smoothly pulled out from the first mold 101 by pressing the mold release rib 25 integrally adjacent to the spring seat 20 with the mold release pin 111. ..
- a mark 85 is formed on the surface portion 81 of the mold release rib 25. This means that the outer member 11 is a member in which the surface portion 81 of the mold release rib 25 is pressed by the mold release pin 111 and pulled out from the first mold 101.
- the number of release pins can be suppressed. Therefore, the maintenance cost of the release pin can be suppressed, and the running cost at the time of manufacturing the outer member 11 can be reduced. Moreover, the length of the release pin 111 can be shortened. Therefore, breakage of the release pin 111 can be suppressed. From this point as well, the running cost at the time of manufacturing the outer member 11 can be reduced. Therefore, the cost increase can be suppressed.
- the ribs required for reinforcing the spring seat 20 are the release ribs 25, it is possible to suppress an increase in weight and the like.
- the shock absorber 10 has a structure in which a separate spring receiving member 12 formed of a resin material is placed on a spring seat 20 of a metal outer member 11.
- the spring receiving member 12 has an insertion hole 121 on the inner peripheral side through which the outer cylinder 17 is inserted.
- the spring receiving member 12 has a suspension spring receiving portion 122 that receives the suspension spring 6 on the outer peripheral side. Therefore, the suspension spring 6 is received by the spring receiving member 12, and the strength of the portion that receives the suspension spring 6 can be secured.
- the spring receiving member 12 eccentricizes the insertion hole 121 with respect to the outer cylinder 17.
- the weight of the suspension spring receiving portion 122 can be reduced as compared with the case where the insertion hole 121 is formed coaxially with the outer cylinder 17. That is, the weight of the spring receiving member 12 can be reduced by making the size of the suspension spring receiving portion 122 a size necessary for receiving the suspension spring 6. Further, since the size of the insertion hole 121 can be increased, the drainage property through the insertion hole 121 can be improved.
- the spring receiving member 12 is provided with recesses 136 and 137 on the bottom surface 133 of the concave portion 132 facing the spring seat 20.
- the recesses 136 and 137 accommodate the parting lines 56 and 57. Therefore, the parting lines 56 and 57 can be used to prevent rotation.
- the spring seat 20 is formed by the first mold 101 and the second mold 102 divided into two in the radial direction thereof, two parting lines 56 and 57 are provided.
- the spring seat 20 is formed in a mold divided into three in the radial direction thereof, three parting lines are provided. That is, the spring seat 20 has at least two parting lines depending on how the mold is split.
- the spring receiving member 12 may be formed with the same number of recesses as the parting line.
- the surface portion 81 of the release rib 25 has a flat surface portion 82 extending in the central axis direction of the outer cylinder 17. Therefore, the spring seat 20 can be pulled out from the first mold 101 more smoothly by pressing the inside of the flat surface portion 82 with the release pin 111. In this case, at least a part of the mark 85 is formed in the inner range of the flat surface portion 82.
- the outer member 11A is used instead of the outer member 11 of the first embodiment.
- the outer member 11A has a mold release rib 25A.
- the release rib 25A is formed at the same position as the release rib 25 with respect to the spring seat 20.
- the release rib 25A protrudes from the base surface 71 so that the amount of protrusion from the base surface 71 increases toward the outer cylinder 17 side in the radial direction of the spring seat 20.
- the mold release rib 25A has an outer end edge portion 75A facing the bottom portion 32 side in the cylinder axial direction.
- the outer edge portion 75A of the release rib 25A has an arc shape instead of a flat shape.
- the release rib 25A has an end portion on the bottom 32 side in the cylinder axial direction at the end position on the outer cylinder 17 side.
- the end portion of the release rib 25A is arranged at substantially the same position as the end portion on the same side of the reinforcing ribs 22 and 24.
- the mold release rib 25A also has a surface portion 81 similar to the mold release rib 25.
- connection portion of the release rib 25A to the outer cylinder 17 is longer in the cylinder axial direction than the release rib 25. Therefore, the spring seat 20 can be reinforced with a higher strength than the release rib 25.
- the shock absorber is arranged between the vehicle body and the axle.
- the shock absorber includes a bottomed cylindrical cylinder, a spring seat, and ribs.
- the spring seat is integrally formed with the cylinder.
- the spring seat projects from the cylinder in the radial direction of the cylinder to support the suspension spring.
- the rib is integrally formed with the cylinder and the spring seat.
- the rib connects the outer peripheral portion of the spring seat and the cylinder.
- the rib is provided with a surface portion at the outer end portion in the radial direction of the cylinder.
- a mark formed at the time of mold release is formed on the surface portion.
- a spring receiving member formed of a resin material is placed on the spring seat.
- the spring receiving member has an insertion hole on the inner peripheral side through which the cylinder is inserted.
- the spring receiving member has a suspension spring receiving portion that receives the suspension spring on the outer peripheral side.
- the insertion hole is eccentric with respect to the cylinder.
- the spring seat has at least two parting lines.
- the spring receiving member is provided with a recess for accommodating the parting line on the surface facing the spring seat.
- a sixth aspect is in any one of the first to fifth aspects, the surface portion has a flat surface portion extending in the central axis direction of the cylinder.
- shock absorber According to the above-mentioned shock absorber, the cost increase can be suppressed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- General Engineering & Computer Science (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
本願は、2020年9月4日に、日本に出願された特願2020-148890号に基づき優先権を主張し、その内容をここに援用する。
本発明の第1実施形態に係る緩衝器について、図1~図10を参照しつつ以下に説明する。
次に、第2実施形態について、主に図11に基づいて、第1実施形態との相違部分を中心に説明する。また、第1実施形態と共通する部位については、同一称呼、同一の符号で表す。
5 車体
6 懸架バネ
10,10A 緩衝器
12 バネ受部材
17 外側シリンダ(シリンダ)
20 スプリングシート
25,25A 離型用リブ(リブ)
56,57 パーティングライン
81 面部
82 平面部
85 痕
121 挿通穴
122 懸架バネ受部
133 底面(対向面)
136,137 凹部
Claims (6)
- 車体と車軸との間に配置される緩衝器であって、
有底筒状のシリンダと、
前記シリンダと一体に形成され、該シリンダから該シリンダの径方向に突出して懸架バネを支持するスプリングシートと、
前記シリンダおよび前記スプリングシートと一体に形成され、該スプリングシートの外周部と前記シリンダとを連結し、前記シリンダの径方向における外端部に面部が設けられたリブと、
を有する緩衝器。 - 前記面部には、離型時に形成された痕が形成されている請求項1に記載の緩衝器。
- 前記スプリングシートには、内周側に前記シリンダが挿通される挿通穴を有すると共に外周側に懸架バネを受ける懸架バネ受部を有して樹脂材により形成されるバネ受部材が載置される請求項1または2に記載の緩衝器。
- 前記挿通穴は前記シリンダに対して偏心している請求項3に記載の緩衝器。
- 前記スプリングシートは、少なくとも2つのパーティングラインを有し、
前記バネ受部材は、前記スプリングシートとの対向面に前記パーティングラインを収容する凹部が設けられている請求項3または4に記載の緩衝器。 - 前記面部は、前記シリンダの中心軸線方向に広がる平面部を有する請求項1乃至5のいずれか一項に記載の緩衝器。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112021004631.4T DE112021004631T5 (de) | 2020-09-04 | 2021-08-30 | Stoßdämpfer |
KR1020237006311A KR102725402B1 (ko) | 2020-09-04 | 2021-08-30 | 완충기 |
JP2022546303A JP7418594B2 (ja) | 2020-09-04 | 2021-08-30 | 緩衝器 |
US18/023,943 US12115830B2 (en) | 2020-09-04 | 2021-08-30 | Shock absorber |
CN202180054491.6A CN116056920A (zh) | 2020-09-04 | 2021-08-30 | 缓冲器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-148890 | 2020-09-04 | ||
JP2020148890 | 2020-09-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022050215A1 true WO2022050215A1 (ja) | 2022-03-10 |
Family
ID=80491727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/031708 WO2022050215A1 (ja) | 2020-09-04 | 2021-08-30 | 緩衝器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US12115830B2 (ja) |
JP (1) | JP7418594B2 (ja) |
CN (1) | CN116056920A (ja) |
DE (1) | DE112021004631T5 (ja) |
WO (1) | WO2022050215A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030096621A (ko) * | 2002-06-17 | 2003-12-31 | 현대모비스 주식회사 | 차량 현가장치용 스트러트 |
US20160023529A1 (en) * | 2014-07-28 | 2016-01-28 | Tenneco Automotive Operating Company Inc. | Plastic spring seat having integrated crash member |
JP2016053409A (ja) * | 2014-09-04 | 2016-04-14 | 株式会社ショーワ | スプリングシート |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3687332B2 (ja) * | 1998-03-18 | 2005-08-24 | 東海ゴム工業株式会社 | コイルスプリング・インシュレータおよびその製造方法 |
US6398201B1 (en) * | 1998-10-09 | 2002-06-04 | Daimlerchrysler Corporation | Vehicle shock absorber pad having a spring containment flange |
US20020135213A1 (en) * | 2001-03-20 | 2002-09-26 | Delphi Technologies Inc. | Strut spring seat support |
JP2008068723A (ja) * | 2006-09-14 | 2008-03-27 | Mazda Motor Corp | サスペンション装置 |
FR3002187B1 (fr) | 2013-02-20 | 2016-07-22 | Peugeot Citroen Automobiles Sa | Dispositif d'amortissement a jambe de force hybride, pour un train avant de vehicule |
JP6482212B2 (ja) | 2014-09-04 | 2019-03-13 | 株式会社ショーワ | スプリングシート |
US9849746B2 (en) * | 2014-11-04 | 2017-12-26 | Tenneco Automotive Operating Company Inc. | Impact reinforced composite spring seat for a shock absorber |
KR102614124B1 (ko) * | 2016-12-13 | 2023-12-13 | 현대자동차주식회사 | 차량용 현가장치의 스프링 시트가 구비된 쇽업소버 |
US20220112933A1 (en) * | 2018-12-27 | 2022-04-14 | Hitachi Astemo, Ltd. | Shock absorber |
JP2020148890A (ja) | 2019-03-13 | 2020-09-17 | 富士ゼロックス株式会社 | 静電荷像現像用トナー、静電荷像現像剤、トナーカートリッジ、プロセスカートリッジ、画像形成装置及び画像形成方法 |
-
2021
- 2021-08-30 WO PCT/JP2021/031708 patent/WO2022050215A1/ja active Application Filing
- 2021-08-30 CN CN202180054491.6A patent/CN116056920A/zh active Pending
- 2021-08-30 JP JP2022546303A patent/JP7418594B2/ja active Active
- 2021-08-30 US US18/023,943 patent/US12115830B2/en active Active
- 2021-08-30 DE DE112021004631.4T patent/DE112021004631T5/de active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030096621A (ko) * | 2002-06-17 | 2003-12-31 | 현대모비스 주식회사 | 차량 현가장치용 스트러트 |
US20160023529A1 (en) * | 2014-07-28 | 2016-01-28 | Tenneco Automotive Operating Company Inc. | Plastic spring seat having integrated crash member |
JP2016053409A (ja) * | 2014-09-04 | 2016-04-14 | 株式会社ショーワ | スプリングシート |
Also Published As
Publication number | Publication date |
---|---|
US20240025220A1 (en) | 2024-01-25 |
US12115830B2 (en) | 2024-10-15 |
DE112021004631T5 (de) | 2023-06-22 |
JP7418594B2 (ja) | 2024-01-19 |
JPWO2022050215A1 (ja) | 2022-03-10 |
KR20230042099A (ko) | 2023-03-27 |
CN116056920A (zh) | 2023-05-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20110291377A1 (en) | Stabilizer bushing for vehicle | |
US9574626B1 (en) | Rigid bracket assembly for mounting a brake assembly and brake actuator | |
CN101253347A (zh) | 液压衬套 | |
JP6942185B2 (ja) | 緩衝器およびその製造方法 | |
JP4508414B2 (ja) | ピストンポンプ | |
WO2022050215A1 (ja) | 緩衝器 | |
US11162550B2 (en) | Caliper for opposed piston type disc brake | |
WO2020137218A1 (ja) | 緩衝器 | |
EP1811197A1 (en) | Piston rod of vehicle shock absorber and method of machining the same | |
JP2019158068A (ja) | ショックアブソーバ | |
JP6379219B2 (ja) | シリンダ装置 | |
KR102725402B1 (ko) | 완충기 | |
JP7504237B2 (ja) | ブラケット固定部材、緩衝器および緩衝器の製造方法 | |
CN114517819B (zh) | 单管阻尼器组件和用于其的液压回弹止动组件 | |
CN113518722A (zh) | 缸筒装置 | |
JP6526247B2 (ja) | シリンダ装置 | |
JP7071580B2 (ja) | 緩衝器 | |
CN103791019B (zh) | 减震器 | |
WO2016043069A1 (ja) | 緩衝器 | |
JP7483019B2 (ja) | 緩衝器 | |
WO2019225544A1 (ja) | 緩衝器 | |
WO2024201696A1 (ja) | 緩衝装置、懸架装置 | |
WO2024154337A1 (ja) | 緩衝装置、懸架装置 | |
WO2023219028A1 (ja) | ソレノイド、ソレノイドバルブ、懸架装置、ソレノイドの組立方法 | |
JP7584368B2 (ja) | 緩衝器の製造方法および緩衝器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21864273 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022546303 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20237006311 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18023943 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21864273 Country of ref document: EP Kind code of ref document: A1 |