WO2016072426A1 - シリンダ装置及びカバー部材 - Google Patents
シリンダ装置及びカバー部材 Download PDFInfo
- Publication number
- WO2016072426A1 WO2016072426A1 PCT/JP2015/081075 JP2015081075W WO2016072426A1 WO 2016072426 A1 WO2016072426 A1 WO 2016072426A1 JP 2015081075 W JP2015081075 W JP 2015081075W WO 2016072426 A1 WO2016072426 A1 WO 2016072426A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder device
- bulging
- end side
- cover member
- dust boot
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/38—Covers for protection or appearance
-
- 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
- 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
- B60G15/07—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 damper being connected to the stub axle and the spring being arranged around the damper
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
- F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/50—Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall
- F16J15/52—Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall by means of sealing bellows or diaphragms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/04—Bellows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/04—Bellows
- F16J3/041—Non-metallic bellows
- F16J3/042—Fastening details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/12—Mounting of springs or dampers
- B60G2204/124—Mounting of coil springs
- B60G2204/1242—Mounting of coil springs on a damper, e.g. MacPerson strut
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/10—Enclosure elements, e.g. for protection
- F16F2230/105—Flexible, e.g. bellows or bladder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2234/00—Shape
- F16F2234/02—Shape cylindrical
Definitions
- the present invention relates to a cylinder device and a cover member.
- the dust boot as the cover member is held by the bump cap with the convex portion on the inner periphery being locked to the flange portion provided on the outer periphery of the bump cap.
- the above dust boot is provided with a thin skirt at the end and a convex portion that is engaged with the flange of the bump cap on the inner periphery thereof. For this reason, when the dust boot is fitted on the bump cap and pressed against the flange portion, the skirt portion is elastically deformed to increase the diameter, and after the convex portion has passed over the flange portion, the skirt portion is reduced in diameter. Thereby, the convex part of a dust boot is latched by the flange part of a bump cap. As described above, the dust boot can be easily assembled to the bump cap as the skirt portion is deformed.
- the dust boot may not be assembled to the bump cap unless the coil spring and the mount member are assembled to the cylinder.
- the present invention aims to improve the assembling property of the cover member.
- a cylinder device including a cylinder from which a piston rod extends from one end, an expandable bellows portion, and a small diameter portion whose inner diameter is smaller than the inner diameter of the bellows portion, A cylindrical cover member that protects the piston rod; and a cap member that is fitted to the cylinder and that has a convex portion that is engaged with the small-diameter portion of the cover member on the outer periphery thereof,
- the small-diameter portion is provided with a cylinder device in which a bulging portion that bulges radially outward is formed.
- the cover member has a cylindrical bellows portion that can be expanded and contracted, and an inner diameter that is larger than an inner diameter of the bellows portion that is locked to a convex portion provided on the outer periphery of the protected body.
- a cover member having a small-diameter portion having a small diameter and a bulging portion formed on the small-diameter portion and bulging outward in the radial direction.
- FIG. 1 is a partial cross-sectional view of a shock absorber according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the bump cap at the convex portion.
- FIG. 3 is a view of the dust boot as viewed from the small diameter portion side.
- FIG. 4 is a view for explaining a bulging portion of the dust boot.
- FIG. 5 is a partial cross-sectional view of a shock absorber according to the second embodiment of the present invention.
- FIG. 6 is a cross-sectional view of the bump cap projection.
- FIG. 7 is a view of the dust boot as viewed from the small diameter portion side.
- FIG. 8 is a view showing the dust boot in the VIII-VIII cross section of FIG.
- FIG. 9 is a view for explaining a bulging portion of the dust boot.
- FIG. 10 is a view showing a modified example of the dust boot.
- a shock absorber 100 as a cylinder device is attached to an automobile (not shown), positions a wheel (not shown) and generates a damping force to suppress vibration of a vehicle body (not shown). It is.
- the shock absorber 100 includes a cylinder 1 in which a piston rod 1 a extends from one end, a mount member 2 connected to the end of the piston rod 1 a, and a spring seat 3 provided on the outer periphery of the cylinder 1. And a coil spring 4 interposed between the mount member 2 and the spring seat 3, a bump stopper 5 fitted to the piston rod 1 a, and a piston rod 1 a side end of the cylinder 1.
- a bump cap 6 as a cap member and a dust boot 7 as a cylindrical cover member for protecting the piston rod 1a are provided.
- a bracket 1b for connecting the shock absorber 100 and a hub carrier (not shown) for holding wheels is provided at the end of the cylinder 1 opposite to the piston rod 1a.
- the shock absorber 100 is connected to the vehicle body by the mount member 2 and is connected to the hub carrier by the bracket 1b and assembled to the vehicle.
- the coil spring 4 is sandwiched between the mount member 2 and the spring seat 3 in a compressed state, and biases the cylinder 1 and the mount member 2 away from each other.
- An annular rubber sheet 8 is interposed between the mount member 2 and the coil spring 4 so that the mount member 2 and the coil spring 4 do not directly contact each other.
- the bump stopper 5 is formed of rubber, urethane, or the like, and contacts the top surface of the bump cap 6 when the shock absorber 100 is contracted to the most contracted length, and restricts the stroke of the shock absorber 100 on the contraction side.
- the bump cap 6 is made of a resin, and has a convex portion 6a provided at three locations in the circumferential direction equally on the outer peripheral surface, and a flange portion 6b provided on the outer peripheral side of the opening end.
- the shape of the convex portion 6a is a triangle having a vertex on the flange portion 6b side, as shown in FIG. Further, the end surface 6 c on the flange portion 6 b side of the convex portion 6 a is a flat portion orthogonal to the axial direction of the shock absorber 100. The convex portion 6a will be described later.
- the flange part 6b is provided partially, and the convex part 6a and the flange part 6b do not overlap in an axial direction. This considers the mold division for manufacturing the bump cap 6 by injection molding.
- the dust boot 7 is made of resin, and as shown in FIG. 1, the expandable bellows portion 7a, the small diameter portion 7b having an inner diameter smaller than the inner diameter of the bellows portion 7a formed at one end, and the outer periphery of the other end And a flange portion 7c formed on the side.
- a bulging portion 7d that bulges radially outward is formed in the small diameter portion 7b.
- the bulging part 7d is formed in eight places.
- a flat portion 7e extending in the shape of a flange outward in the radial direction is provided in a range excluding the bulging portion 7d at the proximal end of the small diameter portion 7b. The bulging portion 7d and the flat portion 7e will be described later.
- the dust boot 7 is manufactured by blow molding, so that the plate thickness t1 of the radial portion 7f in the bulging portion 7d is thinner than the plate thickness t2 of the circumferential portion 7g, as shown in FIG. This will be described later.
- the flange portion 7c is sandwiched between the mount member 2 and the rubber sheet 8, and the small diameter portion 7b is held between the convex portion 6a of the bump cap 6 and the flange portion 6b. And assembled to the shock absorber 100.
- the small diameter portion 7b is locked to the convex portion 6a of the bump cap 6, and when the dust boot 7 is contracted from its free length, the small diameter portion 7b. Is locked to the flange portion 6 b of the bump cap 6.
- the shock absorber 100 when the shock absorber 100 is operated and the dust boot 7 is extended, the surface pressure that the dust boot 7 receives from the convex portion 6a of the bump cap 6 can be reduced. Therefore, the strength and durability of the dust boot 7 can be improved, and the dust boot 7 can be prevented from being detached from the bump cap 6.
- the dust boot 7 When assembling the dust boot 7 to the bump cap 6, the dust boot 7 is fitted to the bump cap 6 and the small diameter portion 7b is pressed against the convex portion 6a.
- the convex portion 6a is a triangle having an apex on the flange portion 6b side, the force pressing the dust boot 7 acts as a force for expanding the small diameter portion 7b.
- the small-diameter portion 7b is expanded in diameter in a state where the peripheral length is increased by elastic deformation of the bulging portion 7d so as to extend in the circumferential direction of the small-diameter portion 7b.
- the dust boot 7 is manufactured by blow molding, whereby the plate thickness t1 of the radial portion 7f in the bulging portion 7d can be made thinner than the plate thickness t2 of the circumferential portion 7g. According to this, since the radial portion 7f is easily deformed in the circumferential direction, when the dust boot 7 is assembled to the bump cap 6, the small diameter portion 7b of the dust boot 7 is greatly expanded.
- the small-diameter portion 7b gets over the convex portion 6a of the bump cap 6, and when the shape of the bulging portion 6d is restored by an elastic force thereafter, the small-diameter portion 7b is reduced in diameter and locked to the convex portion 6a.
- the bulging portion 7d is elastically deformed in the circumferential direction of the small diameter portion 7b.
- the small diameter portion 7b is expanded in diameter in a state in which the peripheral length is extended. According to this, even if the force pressing the dust boot 7 against the bump cap 6 is small, the small diameter portion 7b of the dust boot 7 can easily get over the convex portion 6a of the bump cap 6. Therefore, the assembling property of the dust boot 7 can be improved.
- the convex portions 6a of the bump cap 6 are provided at three locations equally in the circumferential direction. In this way, by providing the projection 6 a by dividing it into a plurality in the circumferential direction, the small diameter portion 7 b of the dust boot 7 is only partially enlarged at the position of the projection 6 a of the bump cap 6. It is possible to get over the convex portion 6a.
- the dust boot 7 is attached to the bump cap 6. Can be assembled.
- the dust boot may not be assembled to the bump cap unless the coil spring or mount member is assembled to the cylinder. In this case, the operator inserts a finger through the gap of the coil spring, and the dust boot is assembled to the bump cap only with the force of the fingertip.
- the dust boot 7 can be assembled to the bump cap 6 even if the force for pressing the dust boot 7 against the bump cap 6 is small. Even after 2 is assembled, the dust boot 7 can be easily assembled to the bump cap 6.
- the bulging portion 7d is elastically deformed in the circumferential direction of the small diameter portion 7b. For this reason, the small diameter portion 7b is expanded in diameter in a state in which the peripheral length is extended. According to this, even if the force pressing the dust boot 7 against the bump cap 6 is small, the small diameter portion 7b of the dust boot 7 can easily get over the convex portion 6a of the bump cap 6. Therefore, the assembling property of the dust boot 7 can be improved.
- the shock absorber 200 is different from the shock absorber 100 in the shape of the dust boot.
- the difference from the shock absorber 100 will be mainly described, and the same components as those of the shock absorber 100 will be denoted by the same reference numerals and description thereof will be omitted.
- the dust boot 70 provided in the shock absorber 200 is made of resin, and as shown in FIG. 5, an expandable / contractible bellows portion 70a, and a small diameter portion 70b having an inner diameter smaller than the inner diameter of the bellows portion 70a formed at one end. And a flange portion 70c formed on the outer peripheral side of the other end.
- the small diameter portion 70b is formed with a bulging portion 70d that bulges outward in the radial direction.
- the bulging part 70d is formed in eight places.
- a flat portion 70e extending like a flange outward in the radial direction is provided in a range excluding the bulging portion 70d at the proximal end of the small diameter portion 70b.
- the dust boot 70 is manufactured by blow molding, so that the plate thickness t1 of the radial portion 70f in the bulging portion 70d is thinner than the plate thickness t2 of the circumferential portion 70g.
- the flange portion 70c is sandwiched between the mount member 2 and the rubber sheet 8, and the small diameter portion 70b is held between the convex portion 6a of the bump cap 6 and the flange portion 6b. And assembled to the shock absorber 200.
- the small diameter portion 70b is locked to the convex portion 6a of the bump cap 6, and when the dust boot 70 is contracted below its free length, the small diameter portion 70b is retained. Is locked to the flange portion 6 b of the bump cap 6.
- the shock absorber 200 when the shock absorber 200 is operated and the dust boot 70 is extended, the surface pressure that the dust boot 70 receives from the convex portion 6a of the bump cap 6 can be reduced. Therefore, the strength and durability of the dust boot 70 can be improved, and the dust boot 70 can be prevented from being detached from the bump cap 6.
- the dust boot 70 When assembling the dust boot 70 to the bump cap 6, the dust boot 70 is fitted into the bump cap 6 and the small diameter portion 70b is pressed against the convex portion 6a.
- the convex portion 6a is a triangle having a vertex on the flange portion 6b side
- the force for pressing the dust boot 70 acts as a force for expanding the small diameter portion 70b.
- the small diameter portion 70 b is expanded in diameter in a state where the peripheral length is increased by elastic deformation of the bulging portion 70 d so as to extend in the circumferential direction of the small diameter portion 70 b.
- the dust boot 70 can be manufactured by blow molding, so that the plate thickness t1 of the radial portion 70f in the bulging portion 70d can be made thinner than the plate thickness t2 of the circumferential portion 70g. According to this, since the radial portion 70f is easily deformed in the circumferential direction, when the dust boot 70 is assembled to the bump cap 6, the small diameter portion 70b of the dust boot 70 is greatly expanded.
- the small-diameter portion 70b gets over the convex portion 6a of the bump cap 6, and when the shape of the bulging portion 6d is restored by an elastic force thereafter, the small-diameter portion 70b is reduced in diameter and locked to the convex portion 6a.
- the bulging portion 70d of the dust boot 70 is formed such that the bulge on the open end side is larger than the bulge on the base end side. This indicates that the peripheral length on the open end side of the bulging portion 70d is longer than the peripheral length on the base end side, and the rigidity on the open end side is lower than the rigidity on the base end side.
- the small diameter portion 70b of the dust boot 70 when the small diameter portion 70b of the dust boot 70 is pressed against the convex portion 6a of the bump cap, the open end side of the bulging portion 70d is deformed more greatly than the base end side. For this reason, the small-diameter portion 70b expands in a taper shape with the expansion on the open end side being larger than the expansion on the base end side.
- the bulging portion 70d is elastically deformed in the circumferential direction of the small diameter portion 70b, and the peripheral length of the small diameter portion 70b is extended.
- the small-diameter portion 70b expands in a tapered shape with the opening on the open end side being larger than the expansion on the base end side. According to this, even if the force pressing the dust boot 70 against the bump cap 6 is small, the small diameter portion 70 b of the dust boot 70 can easily get over the convex portion 6 a of the bump cap 6. Therefore, the assembling property of the dust boot 70 can be improved.
- the state in which the open end side rigidity of the bulging portion 70d of the dust boot 70 is lower than the rigidity on the base end side is obtained by setting the plate thickness t3 on the open end side of the bulging portion 70d to the base end side as shown in FIG. It can also be realized by making it thinner than the plate thickness t4.
- the bulge on the open end side of the bulging portion 70d is made larger than the bulge on the base end side, and the plate thickness t3 on the open end side of the bulge portion 70d is made thinner than the plate thickness t4 on the base end side. Good.
- the convex portions 6a of the bump cap 6 are provided at three portions equally in the circumferential direction. In this way, by providing the projection 6 a by dividing it into a plurality of portions in the circumferential direction, the bump cap 6 can be obtained simply by partially expanding the small diameter portion 70 b of the dust boot 70 at the position of the projection 6 a of the bump cap 6. It is possible to get over the convex portion 6a.
- the dust boot 70 is attached to the bump cap 6. Can be assembled.
- the dust boot 70 can be assembled to the bump cap 6 even if the force for pressing the dust boot 70 against the bump cap 6 is small. Even after the spring 4 and the mount member 2 are assembled, the dust boot 70 can be easily assembled to the bump cap 6.
- the bulging portion 70d is elastically deformed in the circumferential direction of the small diameter portion 70b, and the peripheral length of the small diameter portion 70b is extended. It becomes a state.
- the small-diameter portion 70b expands in a tapered shape with the opening on the open end side being larger than the expansion on the base end side. According to this, even if the force pressing the dust boot 70 against the bump cap 6 is small, the small diameter portion 70 b of the dust boot 70 can easily get over the convex portion 6 a of the bump cap 6. Therefore, the assembling property of the dust boot 70 can be improved.
- the radial portion 70f of the bulging portion 70d is easily deformed in the circumferential direction, the small diameter portion of the dust boot 70 is greatly expanded when the dust boot 70 is assembled to the bump cap 6. Therefore, even if the force for pressing the dust boot 70 against the bump cap 6 is small, the dust boot 70 can be assembled to the bump cap 6.
- the dust boot 70 is in surface contact with the convex portion 6a of the bump cap 6 by the flat portion 7e. For this reason, when the shock absorber 100 is operated and the dust boot 70 is extended, the surface pressure that the dust boot 70 receives from the convex portion 6 a of the bump cap 6 can be reduced. Therefore, the strength and durability of the dust boot 70 can be improved, and the dust boot 70 can be prevented from being detached from the bump cap 6.
- the convex portion 6a of the bump cap 6 is divided into a plurality in the circumferential direction, the small diameter portion 70b of the dust boot 70 is only partially enlarged at the position of the convex portion 6a of the bump cap 6, The bump cap 6 can be moved over the convex portion 6a. Therefore, the dust boot 70 can be assembled to the bump cap 6 even if the force for pressing the dust boot 70 against the bump cap 6 is small compared to the case where the convex portions 6a of the bump cap 6 are continuously provided on the entire circumference. it can.
- the shock absorbers 100 and 200 include a cylinder 1 from which one end of a piston rod 1a extends, an extendable bellows portion 7a and 70a, and small diameter portions 7b and 70b whose inner diameter is smaller than the inner diameter of the bellows portions 7a and 70a.
- Bumps provided on the outer periphery with cylindrical dust boots 7 and 70 for protecting the piston rod 1a and convex portions 6a fitted to the cylinder 1 and engaged with the small diameter portions 7b and 70b of the dust boots 7 and 70 A cap 6, and bulging portions 7 d and 70 d bulging outward in the radial direction are formed in the small diameter portions 7 b and 70 b of the dust boots 7 and 70.
- the dust boots 7 and 70 have inner diameters that are larger than the inner diameters of the bellows portions 7 a and 70 a that are locked to the cylindrical bellows portions 7 a and 70 a that can be expanded and contracted and the convex portions 6 a that are provided on the outer periphery of the bump cap 6. It is characterized by having small small diameter portions 7b and 70b and bulging portions 7d and 70d formed on the small diameter portions 7b and 70b and bulging outward in the radial direction.
- the open end side rigidity of the bulging portion 70d of the dust boot 70 is characterized by being lower than the proximal end side rigidity of the bulging portion 70d.
- the circumferential length on the open end side of the bulging portion 70d of the dust boot 70 is longer than the circumferential length on the proximal end side of the bulging portion 70d.
- the bulge on the open end side of the bulging portion 70d of the dust boot 70 is larger than the bulge on the base end side of the bulging portion 70d.
- the plate thickness t3 on the open end side in the bulging portion 7d of the dust boot 70 is characterized by being thinner than the plate thickness t4 on the base end side in the bulging portion 70d.
- the bulging portion 70d is elastically deformed in the circumferential direction of the small diameter portion 70b, and the peripheral length of the small diameter portion 70b is extended.
- the small-diameter portion 70b expands in a tapered shape with the opening on the open end side being larger than the expansion on the base end side. According to this, even if the force pressing the dust boot 70 against the bump cap 6 is small, the small diameter portion 70 b of the dust boot 70 can easily get over the convex portion 6 a of the bump cap 6. Therefore, the assembling property of the dust boot 70 can be improved.
- the plate thickness t1 of the radial direction portions 7f and 70f in the bulging portions 7d and 70d of the dust boots 7 and 70 is characterized by being thinner than the plate thickness t2 of the circumferential direction portions 7g and 70g.
- flat end portions 7e and 70e extending in a radial shape outwardly and hooked to the convex portion 6a of the bump cap 6 are formed at the proximal end portions of the small diameter portions 7b and 70b of the dust boots 7 and 70, respectively. Further, it is provided in a range excluding the bulging portions 7d and 70d.
- the dust boots 7 and 70 are in surface contact with the convex portions 6a of the bump cap 6 by the flat portions 7e and 70e. For this reason, when the shock absorbers 100 and 200 are operated and the dust boots 7 and 70 are extended, the surface pressure that the dust boots 7 and 70 receive from the convex portion 6a of the bump cap 6 can be reduced. Therefore, the strength and durability of the dust boots 7 and 70 can be improved, and the dust boots 7 and 70 can be prevented from being detached from the bump cap 6.
- the convex portion 6a of the bump cap 6 is provided by being divided into a plurality in the circumferential direction.
- the small-diameter portions 7b and 70b of the dust boots 7 and 70 are able to get over the convex portion 6a of the bump cap 6 only by partially expanding the diameter at the position of the convex portion 6a of the bump cap 6. Therefore, even if the force for pressing the dust boots 7 and 70 against the bump cap 6 is small, the dust boots 7 and 70 can be assembled to the bump cap 6.
- the piston rod 1a is attached to a shock absorber 100, 200 having a cylinder 1 with a piston rod 1a extending from one end and a bump cap 6 fitted to the cylinder 1 and provided with a convex portion 6a on the outer periphery.
- the dust boots 7 and 70 for protecting the bellows are expandable / contractible bellows portions 7a and 70a, and small-diameter portions 7b and 70b whose inner diameter is smaller than the inner diameter of the bellows portions 7a and 70a locked to the convex portion 6a of the bump cap 6.
- the bulging portions 7d and 70d are formed on the small-diameter portions 7b and 70b and bulge outward in the radial direction, and the rigidity on the open end side of the bulging portions 7d and 70d is the base end of the bulging portions 7d and 70d. It is characterized by being lower than the side rigidity.
- the bulging portions 7d and 70d are elastically deformed in the circumferential direction of the small diameter portions 7b and 70b, and the peripheral lengths of the small diameter portions 7b and 70b are extended. It becomes.
- the small-diameter portions 7b and 70b are expanded in a tapered shape with the open end side expanding larger than the base end side expanding. .
- the small diameter portions 7 b and 70 b of the dust boots 7 and 70 can easily get over the convex portion 6 a of the bump cap 6. Therefore, the assembling property of the dust boots 7 and 70 can be improved.
- the cylinder device is described as shock absorbers 100 and 200 for automobiles.
- the cylinder device may be used for two-wheeled vehicles, railroad vehicles, homes, home appliances, industrial machinery, and shipping electric machines. It may be dexterous.
- the cylinder device may be an actuator or the like, for example.
- the cover member is described as the dust covers 7 and 70 of the shock absorbers 100 and 200. It can also be set as a dust cover used for each part of a vessel or the like. In addition to the dust cover, a harness cover, a hose cover, or the like can be used.
- the dust boots 7 and 70 are made of resin. However, if the bulging portions 7d and 70d can be elastically deformed in the circumferential direction of the small diameter portions 7b and 70b, a material other than resin is used. Also good. Accordingly, various materials such as rubber, spring steel, and cloth can be used as the material of the dust boots 7 and 70, for example.
- the shock absorbers 100 and 200 are described as strut type shock absorbers.
- a shock absorber other than the strut type may be used, for example, a shock absorber in which a coil spring is disposed separately. .
- the convex part 6a of the bump cap 6 is provided in the circumferential direction equally divided three places in the outer peripheral surface of the bump cap 6, the number of the convex parts 6a may be two or less. And four or more. Moreover, the arrangement
- the bulging parts 7d and 70d of the dust boots 7 and 70 are provided in eight places, the number of the bulging parts 7d and 70d may be seven or less, and 9 There may be more than one.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Sealing Devices (AREA)
- Actuator (AREA)
- Vehicle Body Suspensions (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
以下、図1~図4を参照しながら本発明の第1実施形態に係るショックアブソーバ100について説明する。
続いて、図5~図9を参照しながら本発明の第2実施形態に係るショックアブソーバ200について説明する。
Claims (10)
- シリンダ装置であって、
一端からピストンロッドが延出するシリンダと、
伸縮可能な蛇腹部と前記蛇腹部の内径よりも内径が小さい小径部とを有し、前記ピストンロッドを保護する筒状のカバー部材と、
前記シリンダに嵌装され、前記カバー部材の前記小径部が係止される凸部が外周に設けられたキャップ部材と、
を備え、
前記カバー部材の前記小径部には、径方向外側に膨らむ膨出部が形成される、
シリンダ装置。 - 請求項1に記載のシリンダ装置であって、
前記膨出部における開放端側の剛性は、前記膨出部における基端側の剛性よりも低い、
シリンダ装置。 - 請求項2に記載のシリンダ装置であって、
前記カバー部材の前記膨出部における前記開放端側の周長は、前記膨出部における前記基端側の周長よりも長い、
シリンダ装置。 - 請求項2に記載のシリンダ装置であって、
前記カバー部材の前記膨出部における前記開放端側の膨らみは、前記膨出部における前記基端側の膨らみよりも大きい、
シリンダ装置。 - 請求項2に記載のシリンダ装置であって、
前記カバー部材の前記膨出部における前記開放端側の板厚は、前記膨出部における前記基端側の板厚よりも薄い、
シリンダ装置。 - 請求項2に記載のシリンダ装置であって、
前記カバー部材の前記膨出部における径方向部の板厚は、前記膨出部における周方向部の板厚よりも薄い、
シリンダ装置。 - 請求項2に記載のシリンダ装置であって、
前記カバー部材の前記小径部における前記基端側の端部には、径方向外側に鍔状に延びて前記キャップ部材の前記凸部に係止される平坦部が、前記膨出部を除いた範囲に設けられる、
シリンダ装置。 - 請求項2に記載のシリンダ装置であって、
前記キャップ部材の前記凸部は、周方向に複数に分割して設けられる、
シリンダ装置。 - カバー部材であって、
伸縮可能な筒状の蛇腹部と、
被保護体の外周に設けられた凸部に係止される前記蛇腹部の内径よりも内径が小さい小径部と、
前記小径部に形成された径方向外側に膨らむ膨出部と、
を有するカバー部材。 - 請求項9に記載のカバー部材であって、
一端からピストンロッドが延出するシリンダと、前記シリンダに嵌装され、外周に前記凸部が設けられたキャップ部材と、を備えるシリンダ装置に取り付けられて前記ピストンロッドを保護し、
前記膨出部における開放端側の剛性は、前記膨出部における基端側の剛性よりも低い、
カバー部材。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI2017701456A MY189976A (en) | 2014-11-04 | 2015-11-04 | Cylinder device and cover member |
BR112017008425-2A BR112017008425B1 (pt) | 2014-11-04 | 2015-11-04 | Dispositivo cilíndrico e elemento de cobertura |
US15/524,260 US10167919B2 (en) | 2014-11-04 | 2015-11-04 | Cylinder device and cover member |
CA2964841A CA2964841C (en) | 2014-11-04 | 2015-11-04 | Cylinder device and cover member |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-224630 | 2014-11-04 | ||
JP2014224623A JP6353767B2 (ja) | 2014-11-04 | 2014-11-04 | シリンダ装置及びカバー部材 |
JP2014-224623 | 2014-11-04 | ||
JP2014224630A JP6397726B2 (ja) | 2014-11-04 | 2014-11-04 | シリンダ装置及びカバー部材 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016072426A1 true WO2016072426A1 (ja) | 2016-05-12 |
Family
ID=55909151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/081075 WO2016072426A1 (ja) | 2014-11-04 | 2015-11-04 | シリンダ装置及びカバー部材 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10167919B2 (ja) |
BR (1) | BR112017008425B1 (ja) |
CA (1) | CA2964841C (ja) |
MY (1) | MY189976A (ja) |
WO (1) | WO2016072426A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018202831A1 (de) * | 2018-02-26 | 2019-08-29 | Zf Friedrichshafen Ag | Verstellbarer Federträger |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6160570B2 (ja) * | 2014-07-16 | 2017-07-12 | 株式会社アドヴィックス | ブレーキ倍力装置 |
CN108751056B (zh) * | 2018-08-31 | 2023-10-27 | 浙江鑫良仓储设备有限公司 | 一种运输用叉车起升油缸防护装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20050242542A1 (en) * | 2004-04-30 | 2005-11-03 | Zf Friedrichshafen Ag | Suspension strut top mount |
US20090145707A1 (en) * | 2007-12-11 | 2009-06-11 | Zf Friedrichshafen Ag | Piston-cylinder unit with piston rod protector |
JP2014185656A (ja) * | 2013-03-22 | 2014-10-02 | Tokai Rubber Ind Ltd | ダストカバー |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4634667B2 (ja) | 2001-08-24 | 2011-02-16 | 株式会社ショーワ | 油圧緩衝器のダストカバー固定構造 |
WO2014102861A1 (ja) * | 2012-12-26 | 2014-07-03 | トヨタ自動車株式会社 | 車両用サスペンション装置及び車両用サスペンション装置の組立方法 |
JP6004580B2 (ja) * | 2013-03-22 | 2016-10-12 | 住友理工株式会社 | ダストカバー組立体 |
JP5700896B1 (ja) * | 2014-03-20 | 2015-04-15 | 株式会社ショーワ | カバー部材および緩衝装置 |
JP6160583B2 (ja) * | 2014-09-16 | 2017-07-12 | トヨタ自動車株式会社 | 車両用サスペンション装置 |
-
2015
- 2015-11-04 MY MYPI2017701456A patent/MY189976A/en unknown
- 2015-11-04 BR BR112017008425-2A patent/BR112017008425B1/pt active IP Right Grant
- 2015-11-04 WO PCT/JP2015/081075 patent/WO2016072426A1/ja active Application Filing
- 2015-11-04 CA CA2964841A patent/CA2964841C/en active Active
- 2015-11-04 US US15/524,260 patent/US10167919B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050242542A1 (en) * | 2004-04-30 | 2005-11-03 | Zf Friedrichshafen Ag | Suspension strut top mount |
US20090145707A1 (en) * | 2007-12-11 | 2009-06-11 | Zf Friedrichshafen Ag | Piston-cylinder unit with piston rod protector |
JP2014185656A (ja) * | 2013-03-22 | 2014-10-02 | Tokai Rubber Ind Ltd | ダストカバー |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018202831A1 (de) * | 2018-02-26 | 2019-08-29 | Zf Friedrichshafen Ag | Verstellbarer Federträger |
Also Published As
Publication number | Publication date |
---|---|
MY189976A (en) | 2022-03-22 |
BR112017008425B1 (pt) | 2023-10-31 |
BR112017008425A2 (pt) | 2018-01-23 |
CA2964841A1 (en) | 2016-05-12 |
US10167919B2 (en) | 2019-01-01 |
US20170321779A1 (en) | 2017-11-09 |
CA2964841C (en) | 2022-10-25 |
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