WO2015121922A1 - シリンダ装置 - Google Patents
シリンダ装置 Download PDFInfo
- Publication number
- WO2015121922A1 WO2015121922A1 PCT/JP2014/053174 JP2014053174W WO2015121922A1 WO 2015121922 A1 WO2015121922 A1 WO 2015121922A1 JP 2014053174 W JP2014053174 W JP 2014053174W WO 2015121922 A1 WO2015121922 A1 WO 2015121922A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cylinder
- protective cover
- diameter
- cover
- axial direction
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0241—Fibre-reinforced plastics [FRP]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
- F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/0023—Purpose; Design features protective
Definitions
- the present invention relates to a cylinder device.
- Non-Patent Document 1 Some cylinder devices cover the rod with a protective cover (see Non-Patent Document 1, for example).
- the present invention provides a cylinder device capable of improving quality.
- the cylinder device includes a cylinder and a rod extending from the cylinder.
- a cylindrical protective cover that covers the rod and the cylinder is attached to the rod side.
- a mounting portion that is attached to the rod side is provided on one end side in the axial direction of the protective cover.
- At least the other axial end of the protective cover has a reduced diameter portion that decreases in diameter toward the distal end side of the other end, and an enlarged diameter portion that increases in diameter toward the distal end side of the other end. They are alternately formed in the axial direction through the small-diameter portions therebetween.
- the end surface on the other end side of the protective cover is configured by a surface cut at a position other than the small diameter portion. In a state where the small diameter portion closest to the end surface is in contact with the outer peripheral surface of the cylinder, the end surface is not in contact with the outer peripheral surface of the cylinder in the radial direction.
- the protective cover may be formed of a resin material.
- the mounting portion of the protective cover may be slidably fitted to the rod side.
- At least the other end side of the protective cover can be bent with flexibility.
- the protective cover has the same diameter that is larger in diameter than the small diameter portion and extends in the axial direction between the enlarged diameter portion and the reduced diameter portion. A part may be provided.
- a plurality of the small diameter portions may be partially provided in the circumferential direction.
- the protective cover may be formed by blow molding.
- the quality can be improved.
- FIG. 3 is a sectional view taken along line XX of FIG. 2 showing a protective cover of the cylinder device according to the first embodiment of the present invention. It is an expanded sectional view of the important section showing the state where the protection cover of the cylinder device of a 1st embodiment concerning the present invention contacted the cylinder. It is sectional drawing which shows the protective cover of the cylinder apparatus of 2nd Embodiment which concerns on this invention.
- a cylinder device 10 includes a cylinder 11 and a rod 12 that extends from one end in the axial direction of the cylinder 11 to the outside of the cylinder 11 with the cylinder 11 and the central axis aligned.
- a cylindrical protective cover 13 that is attached to the rod 12 side and covers the rod 12 and the cylinder 11, a disk-shaped head cap 14 for attaching the protective cover 13 to the rod 12, and the head cap 14 is fixed to the rod 12.
- an annular mounting member 15 15.
- the rod 12 is made of metal.
- the rod 12 has one end in the axial direction inserted into the cylinder 11 and the other end extending from the cylinder 11 to the outside.
- the rod 12 is formed with a small-diameter shaft portion 22 having a smaller diameter than the large-diameter shaft portion 21 on the cylinder 11 side in a predetermined range opposite to the cylinder 11 in a portion extending from the cylinder 11.
- the rod 12 has a piston (not shown) attached to an axial end portion inserted into the cylinder 11 and moves integrally with the piston.
- the cylinder device 10 is a shock absorber that generates a damping force against the movement of the rod 12 and a piston (not shown) with respect to the cylinder 11.
- the cylinder 11 includes a cylinder body 25 that contains a piston (not shown) and into which the rod 12 is inserted, and a mounting eye 26 that is fixed to the opposite side of the cylinder body 25 from the side on which the rod 12 extends in the axial direction. is doing.
- the cylinder body 25 has a cylindrical surface whose outer peripheral surface 25a has a substantially constant diameter.
- the cylinder body 25 is made of metal, and the outer surface including the outer peripheral surface 25a is painted and covered with a coating film.
- the head cap 14 is made of metal.
- the head cap 14 is formed with a tapered cone-shaped plate portion 31 that slightly protrudes in the plate thickness direction so that the protruding amount in the axial direction increases toward the central portion in the radial direction.
- the head cap 14 has a perforated disk shape in which a through hole 32 penetrating in the axial direction is formed at the center in the radial direction at the top position of the conical plate portion 31.
- the head cap 14 includes an annular intermediate flat plate portion 33 that extends radially outward from the outer peripheral edge portion of the conical plate portion 31 in a plane along the axis orthogonal direction, and a shaft extending from the outer peripheral edge portion of the intermediate flat plate portion 33.
- a ring-shaped annular portion 34 slightly protruding in the opposite direction to the conical plate portion 31 along the direction, and an end edge portion on the opposite side from the intermediate flat plate portion 33 in the axial direction of the annular portion 34 along the axis orthogonal direction.
- an annular edge flat plate portion 35 extending radially outward in the plane.
- the edge flat plate portion 35 and the intermediate flat plate portion 33 are parallel and shifted in the axial direction, and are formed in a stepped shape including the annular portion 34.
- the head cap 14 is attached to the cylindrical protective cover 13 so as to close one end thereof. In this state, the head cap 14 is brought into contact with the end surface of the large diameter shaft portion 21 on the small diameter shaft portion 22 side by inserting the small diameter shaft portion 22 of the rod 12 through the through hole 32.
- the mounting member 15 is made of metal and has an annular shape. The mounting member 15 is press-fitted into the small diameter shaft portion 22. As a result, the head cap 14 that contacts the end face of the large-diameter shaft portion 21 of the rod 12 is sandwiched between the end face. As a result, the head cap 14 is fixed to the rod 12.
- the head cap 14 may be fixed to the rod 12 in a state of being attached to the protective cover 13 in advance. Alternatively, the protective cover 13 may be attached to the head cap 14 in a state of being attached to the rod 12 first.
- the protective cover 13 is made of synthetic resin.
- the protective cover 13 includes a cylindrical body 41 having a constant diameter formed at an intermediate portion in the axial direction, a mounting portion 42 formed at one end in the axial direction, and a substantially formed at the other end in the axial direction. And a cylindrical length adjusting portion 43.
- a length adjustment portion 43 is formed on the opposite side of the attachment portion 42 of the trunk portion 41, and the length adjustment portion 43 of the trunk portion 41 is A mounting portion 42 is formed on the opposite side.
- the attachment portion 42 includes a substantially cylindrical opening 46 formed at an end opposite to the body portion 41, and a radial direction of the protective cover 13 (hereinafter referred to as a cover radial direction) from one end side of the opening 46 in the cover axial direction. And a cylindrical plate extending in the axial direction connecting the outer peripheral edge of the locking plate 47 and one end edge of the body portion 41 in the cover axial direction. And a cylindrical portion 48 having a cylindrical shape. A plurality of locking projections 49 projecting inward in the cover radial direction are formed in the cylindrical portion 48 at intervals in the circumferential direction of the protective cover 13 (hereinafter referred to as the cover circumferential direction).
- the head cap 14 is fitted to the attachment portion 42 at the outer peripheral edge portion of the substantially cylindrical fitting cylinder portion 50 of the cylindrical portion 48 between the locking plate portion 47 and the locking projection 49. In this state, the head cap 14 is clamped from both sides in the axial direction by the locking plate portion 47 and the plurality of locking projections 49. As a result, the head cap 14 is restricted from moving in the radial direction with respect to the protective cover 13 by the fitting tube portion 50, and is restricted from moving in the axial direction by the locking plate portion 47 and the locking convex portion 49 and integrated with the protective cover 13. Is done.
- the protective cover 13 has the attachment portion 42 on one end side in the axial direction attached to the head cap 14 on the rod 12 side.
- the head cap 14 is inserted into the length adjusting portion 43 and the body portion 41, and over the locking convex portion 49 while elastically deforming the locking convex portion 49 and the fitting tube portion 50, the head cap 14 is attached to the mounting portion 42 as described above. It is attached.
- the length adjusting portion 43 is a range of at least a part of the protective cover 13 on the other end side in the cover axial direction which is opposite to the mounting portion 42 on the one end side in the cover axial direction.
- the length adjusting portion 43 includes a main cylindrical portion 61 having a cylindrical shape with an inner diameter and an outer diameter slightly larger than the inner diameter and the outer diameter of the body portion 41, and a constant diameter. It has a plurality of bulging portions 62 that are formed at intervals in the cover circumferential direction and bulge in a curved shape inward in the cover radial direction from the inner circumferential surface 61 a of the main cylinder portion 61.
- the bulging portion 62 has a center in the cover axial direction and a center in the cover circumferential direction that protrudes most from the inner peripheral surface 61a, and the protruding amount from the inner peripheral surface 61a is smaller toward both sides in the cover axial direction.
- the protrusion amount from the inner peripheral surface 61a is smaller.
- the bulging portion 62 has a substantially constant thickness, and is therefore recessed inward in the cover radial direction from the outer peripheral surface 61 b of the main cylinder portion 61.
- the bulging portion 62 has an elliptical shape that is long in the circumferential direction of the cover when viewed along the cover radial direction, and the plurality of bulging portions 62 are all the same size.
- a plurality of (specifically, eight) bulging portions 62 are formed at equal intervals in the cover circumferential direction by aligning the positions in the cover axial direction (horizontal rows). ) Are partially formed in a plurality of rows (specifically, 5 rows) at a predetermined interval in the cover axis direction as shown in FIG. A portion between the bulging portion 62 and the bulging portion 62 adjacent to each other in the cover axial direction of the main cylinder portion 61 and both outer portions of the bulging portions 62 at both ends in the cover axial direction form the bulging portion 62. It is the cylindrical same diameter part 63 extended with the same diameter in the cover axial direction which is not carried out.
- the bulging portions 62 in each row are formed with the same position in the cover circumferential direction.
- the bulging portion 62 has a plurality of rows (vertical rows) that are partially formed at five positions (specifically, five positions) with the positions in the cover circumferential direction aligned and spaced in the cover axial direction.
- a plurality of rows (specifically, 8 rows) are partially formed at predetermined equal intervals in the direction.
- the bulging tip positions (in other words, the center position in the cover axial direction) of the plurality of bulging portions 62 that are aligned in the cover axial direction have the smallest diameter in the length adjusting portion 43 in the virtual circle connecting them.
- This portion of each bulging portion 62 constitutes a small diameter portion 66. Therefore, similarly to the bulging portion 62, the small-diameter portion 66 is also provided in a plurality of portions (specifically, eight locations) in a row in the circumferential direction of the cover, and such rows are partially arranged in the cover axial direction.
- a plurality of columns (specifically, five columns) are provided.
- the one end side in the cover axial direction where the attachment portion 42 is formed rather than the small diameter portions 66 of the plurality of bulging portions 62 that are aligned in the cover axial direction is closer to the smaller diameter portion 66 side. It has a small diameter, and this portion of each bulging portion 62 constitutes a reduced diameter portion 67. Therefore, similarly to the bulging portion 62, the reduced diameter portion 67 is also provided partially in a row at a plurality of locations (specifically, 8 locations) in the circumferential direction of the cover. Thus, a plurality of columns (specifically, 5 columns) are provided.
- the other end side in the cover axial direction opposite to the attachment portion 42 is smaller than the small diameter portion 66 of the plurality of bulging portions 62 that are aligned in the cover axial direction.
- the diameter of the bulging portion 62 forms an enlarged diameter portion 68 as the diameter of the bulging portion 62 increases. Therefore, similarly to the bulging portion 62, the enlarged diameter portion 68 is also provided in a row at a plurality of locations (specifically, 8 locations) in the circumferential direction of the cover. Thus, a plurality of columns (specifically, 5 columns) are provided.
- the diameter-reduced portions 67 with a smaller diameter and the diameter-increased portions 68 with a larger diameter toward the tip of the other end in the cover axial direction are alternately formed in the axial direction with the small-diameter portions 66 disposed therebetween. ing. Moreover, between the enlarged diameter part 68 and the reduced diameter part 67, the same diameter part 63 extended in the axial direction with the same diameter is provided. The same diameter portion 63 has a larger diameter than the small diameter portion 66.
- the protective cover 13 is made of a synthetic resin material such as high-density polyethylene, polypropylene, or polyamide, and has a relatively high hardness (not to be deformed by gravity). It is desirable from the viewpoint of manufacturability that these materials are formed by blow molding. Although illustration is omitted, the protective cover 13 immediately after blow molding has residual portions of blow molding left at both ends in the axial direction, and these residual portions are cut and removed, whereby both axial end surfaces 13a, 13b is formed. One end surface 13 a on the side of the attachment portion 42 is formed in the opening 46. The other end surface 13 b is formed on the other end side opposite to the attachment portion 42 of the protective cover 13, that is, on the opposite side to the body portion 41 of the length adjusting portion 43.
- a synthetic resin material such as high-density polyethylene, polypropylene, or polyamide
- the end surface 13b is configured by a surface cut in a direction orthogonal to the cover axial direction at a position other than the small-diameter portion 66 of the length adjusting portion 43, and specifically, a position other than the bulging portion 62, that is, the same diameter. It is constituted by a surface cut in a direction orthogonal to the cover axial direction at the position of the portion 63.
- the protective cover 13 is attached to the rod 12 via a head cap 14 on the rod 12 side, and in a natural state where no external force is applied, the central axis coincides with the rod 12 and the cylinder 11. Let me cover them. In this state, a gap is provided between the small diameter portion 66 of the protective cover 13 and the outer peripheral surface 25 a of the cylinder body 25 of the cylinder 11.
- the protective cover 13 is made of a flexible synthetic resin, and although the mounting portion 42 is fitted to the head cap 14 on the rod 12 side, the protective cover 13 is elastically deformed so as to tilt the central axis with respect to the rod 12. It is possible to move.
- the protective cover 13 can be bent with flexibility at least at the other end opposite to the mounting portion 42.
- the protective cover 13 has a plurality of rows (specifically, five rows) of rows of a plurality of bulging portions 62 that are aligned in the cover axial direction with a space in the cover axial direction.
- a plurality of the same-diameter portions 63 are formed at intervals in the cover axial direction.
- the position of the end surface 13 b formed by cutting is selectively determined from the plurality of the same diameter portions 63 with respect to a plurality of types of cylinders 11 having different axial lengths and the like.
- the end surface 13b is formed by cutting.
- the cylinder 11 having a shorter axial length than this is cut at the same diameter portion 63 between the fifth row of bulging portions 62 and the fourth row of bulging portions 62 from the body portion 41 side.
- the same-diameter portion 63 between the third row of bulging portions 62 and the second row of bulging portions 62 from the body 41 side is performed at 63 to form the end faces 13b.
- the protective cover 13 has the small-diameter portion 66 closest to the end surface 13b, even if the protective cover 13 swings or bends.
- the end surface 13b and the outer peripheral surface 25a of the cylinder 11 are configured so as not to contact in the radial direction in a state where the outer peripheral surface 25a is in contact with the outer peripheral surface 25a.
- some cylinder devices include a cylinder and a rod extending from the cylinder, and a rod-shaped protective cover that covers the rod and the cylinder is attached to the rod side.
- a rod-shaped protective cover that covers the rod and the cylinder is attached to the rod side.
- the end of the protective cover opposite to the attachment side to the rod may come into contact with the outer peripheral surface of the cylinder, which may damage the outer peripheral surface of the cylinder. is there.
- the outer peripheral surface of the cylinder is peeled off and causes quality deterioration such as rust and corrosion.
- the end surface 13b and the outer periphery of the cylinder 11 are used. It exists in the position which does not contact with the surface 25a in radial direction. For this reason, it can prevent that the edge part 13c by the side of the inner peripheral surface 61a of the end surface 13b contacts with the outer peripheral surface 25a of the cylinder 11. FIG. Thereby, it can prevent that the coating film of the outer peripheral surface 25a of the cylinder 11 is damaged by the edge part 13c, and the rust and corrosion which arise in the cylinder 11 can be suppressed. Therefore, quality can be improved.
- the length adjusting portion 43 of the protective cover 13 has a reduced diameter portion 67 whose diameter decreases toward the distal end side of the length adjusting portion 43 and a diameter that increases toward the distal end side of the length adjusting portion 43. Since the enlarged diameter portions 68 are alternately formed in the axial direction, a plurality of types of protective covers 13 having different axial lengths can be formed by changing the cutting position with respect to a common blow-molded product. . Moreover, in any type, the end surface 13b and the outer peripheral surface 25a of the cylinder 11 do not contact in the radial direction in a state where the small diameter portion 66 closest to the end surface 13b of the protective cover 13 is in contact with the outer peripheral surface 25a of the cylinder 11. Therefore, the edge portion 13c of the end surface 13b on the inner peripheral surface 61a side can be prevented from coming into contact with the outer peripheral surface 25a of the cylinder 11.
- the protective cover 13 is formed of a resin material, the protective cover 13 is liable to be swung or deformed with respect to the cylinder 11. Therefore, if the above-described configuration of the first embodiment is not adopted, the inner peripheral surface 61a side of the end surface 13b is used. The edge portion 13c is more likely to come into contact with the outer peripheral surface 25a of the cylinder 11. Therefore, the effect of adopting the above configuration of the first embodiment is high.
- a hard resin material suitable for blow molding is used, the coating on the outer peripheral surface 25a of the cylinder 11 is more easily damaged when in contact with the soft resin material. Therefore, the above-described configuration of the first embodiment is employed. The effect is high.
- the protective cover formed with a resin material it is better to use a hard resin material. This is because a soft resin material is not suitable for blow molding, and it is necessary to perform injection molding, which is poor in moldability as compared with blow molding.
- the mounting portion 42 of the protective cover 13 is swingably fitted to the head cap 14 on the rod 12 side, the inner peripheral surface 61a of the end surface 13b is not adopted unless the configuration of the first embodiment is employed.
- the side edge portion 13 c is likely to come into contact with the outer peripheral surface 25 a of the cylinder 11. Therefore, the effect of adopting the above configuration of the first embodiment is high.
- the length adjusting portion 43 on the other end side of the protective cover 13 adopts the above-described configuration of the first embodiment when at least the end portion on the side opposite to the mounting portion 42 can be bent with flexibility. Otherwise, the edge portion 13c on the inner peripheral surface 61a side of the end surface 13b is likely to come into contact with the outer peripheral surface 25a of the cylinder 11. Therefore, the effect of adopting the above configuration of the first embodiment is high.
- the protective cover 13 is provided with the same diameter portion 63 that is larger in diameter than the small diameter portion 66 and extends in the axial direction between the enlarged diameter portion 68 and the reduced diameter portion 67. If cutting for length adjustment is performed at the same diameter portion 63, this cutting becomes easy. In addition, if it is not the small diameter part 66, even if it cut
- the protective cover 13 is formed by blow molding, it can be easily formed in the above-described shape.
- the protective cover 13A is partially different from the protective cover 13 of the first embodiment.
- the length adjustment unit 43A is partially different from the length adjustment unit 43 of the first embodiment.
- the length adjusting portion 43A is at least a partial range on the other end side in the cover axial direction which is the opposite side to the mounting portion 42 on the one end side in the cover axial direction in the protective cover 13A. Yes.
- the length adjusting portion 43A is formed in an annular shape in which a bulging portion 62A that bulges in a curved shape inward in the cover radial direction from the inner peripheral surface 61a of the main cylinder portion 61 is formed in the cover circumferential direction. Yes.
- a plurality (specifically, five places) of such annular bulging portions 62A are formed at predetermined intervals in the cover axial direction.
- the center of the bulging portion 62A protrudes most from the inner peripheral surface 61a in the cover axial direction, and the protruding amount from the inner peripheral surface 61a is smaller toward both sides in the cover axial direction.
- the bulging portion 62 ⁇ / b> A has a substantially constant thickness, and thus has an annular shape and is recessed from the outer peripheral surface 61 b of the main tube portion 61 inward in the cover radial direction.
- the plurality of bulging portions 62A are all the same size.
- a portion between the bulging portion 62A and the bulging portion 62A adjacent to each other in the cover axial direction of the main cylinder portion 61 and both outer portions of the bulging portions 62 at both ends in the cover axial direction are the same as in the first embodiment. Of the same diameter.
- the bulging tip position of the bulging portion 62A (in other words, the center position in the cover axial direction) has a circular shape continuous over the entire circumference in the cover circumferential direction, and this portion has the largest diameter in the length adjusting portion 43.
- one end side in the cover axial direction in which the attachment portion 42 is formed rather than the small diameter portion 66A of the bulging portion 62A has a circular shape continuous over the entire circumference in the cover circumferential direction, and this portion has a small diameter. It is a reduced diameter portion 67A having a smaller diameter toward the portion 66 side.
- the other end side in the cover axial direction opposite to the attachment portion 42 than the small diameter portion 66A of the bulging portion 62A has a circular shape continuous over the entire circumference in the cover circumferential direction, and this portion has a diameter.
- the reduced diameter portion 67A whose diameter decreases toward the tip end at the other end in the cover axial direction as described above, and the cover axial direction
- the enlarged diameter portions 68A whose diameter increases toward the tip of the other end are alternately formed in the cover axial direction with the small diameter portions 66A disposed therebetween. Further, between the enlarged diameter portion 68A and the reduced diameter portion 67A, there is provided the same diameter portion 63 having a larger diameter than the small diameter portion 66A and extending in the cover shaft direction.
- the protective cover 13A of the second embodiment is also formed in the same manner as in the first embodiment, and its end surface 13b is a surface cut in a direction orthogonal to the cover axial direction at a position other than the small diameter portion 66A of the length adjusting portion 43A. Specifically, it is constituted by a surface cut in a direction perpendicular to the cover axial direction at a position other than the bulging portion 62A, that is, at the position of the same diameter portion 63.
- the protective cover 13A is also formed with a plurality of the same-diameter portions 63 at intervals in the cover axial direction, and the position of the end surface 13b formed by cutting is selectively determined from the plurality of the same-diameter portions 63. It is like that. And even if it is a case where the end surface 13b is formed in the position of any same diameter part 63, the protective cover 13A is in the state where the small diameter part 66A closest to the end surface 13b is in contact with the outer peripheral surface 25a of the cylinder 11. 13b and the outer peripheral surface 25a of the cylinder 11 do not contact in the radial direction.
- the bulging portion 62A of the protective cover 13A has an annular shape that is continuous in the circumferential direction of the cover, so that the strength against deformation of the protective cover 13A can be improved. Further, the mold shape at the time of blow molding is simplified, and the manufacturing cost can be reduced.
- the protective cover 13A when forming the protective cover 13A using a soft material such as synthetic rubber, it may be formed in a bellows shape.
- the protective cover 13B is partially different from the protective cover 13 of the first embodiment.
- the length adjusting unit 43B is the length of the first embodiment.
- the height adjustment unit 43 is partially different.
- the length adjusting portion 43B is a range of at least a part on the other end side in the cover axial direction which is the opposite side to the mounting portion 42 on the one end side in the cover axial direction in the protective cover 13B. Yes.
- the length adjusting portion 43B has a main cylinder portion 61B having a cylindrical shape having an inner diameter and an outer diameter that are slightly smaller than the inner diameter and the outer diameter of the body portion 41, respectively. Further, the length adjusting portion 43B is formed with a concave portion 62B that is recessed in a curved shape outward in the cover radial direction from the inner peripheral surface 61Ba of the main cylinder portion 61B so as to form an annular shape that is continuous in the cover circumferential direction. Yes. A plurality (specifically, five) of such annular concave portions 62B are formed at predetermined intervals in the cover axial direction.
- the concave portion 62B has a substantially constant thickness, and thus has a shape that bulges outward in the cover radial direction from the outer peripheral surface 61Bb of the main cylinder portion 61B.
- the concave portion 62B has a large-diameter portion 66B that is recessed most from the inner peripheral surface 61Ba at the center in the cover axial direction, and the concave amount from the inner peripheral surface 61Ba is smaller toward both sides in the cover axial direction.
- there is a small diameter portion 63B extending with the same diameter in the axial direction of the main cylinder portion 61B.
- the bottom position of the concave portion 62B (in other words, the center position in the cover axial direction) has a circular shape continuous over the entire circumference in the cover circumferential direction, and this portion has the largest radial direction in the length adjusting portion 43B. It is a large diameter portion 66B. Further, one end side in the cover axial direction where the attachment portion 42 is formed rather than the large-diameter portion 66B of the concave portion 62B has a circular shape continuous over the entire circumference in the cover circumferential direction, and this portion has a large diameter.
- the enlarged diameter portion 68B has a larger diameter toward the diameter portion 66B.
- the other end side in the cover axial direction opposite to the attachment portion 42 is larger than the large-diameter portion 66B of the concave portion 62B, and has a circular shape continuous over the entire circumference in the cover circumferential direction.
- the annular concave portions 62B are formed in a plurality of rows at intervals in the cover axial direction, the diameter-reduced portion 67B whose diameter decreases toward the distal end side of the other end in the cover axial direction as described above,
- the enlarged-diameter portions 68B whose diameter increases toward the tip end at the other end in the cover axial direction are alternately formed in the axial direction so that the small-diameter portions 63B extending in the axial direction with the same diameter are disposed therebetween.
- the small diameter portion 63B has a smaller diameter than the large diameter portion 66B.
- An R chamfer shape is formed between the reduced diameter portion 67B and the small diameter portion 63B.
- the protective cover 13B of the third embodiment is also formed in the same manner as in the first embodiment, and its end surface 13b is a surface cut in a direction orthogonal to the cover axial direction at a position other than the small diameter portion 63B of the length adjusting portion 43B. Specifically, it is constituted by a surface cut in a direction orthogonal to the cover axial direction at the position of the large-diameter portion 66B of the concave portion 62B.
- the protective cover 13B has a plurality of large-diameter portions 66B formed at intervals in the cover axial direction, and the positions of the end surfaces 13b formed by the cutting of the plurality of large-diameter portions 66B aligned in the cover axial direction. It can be selected selectively from the inside. And even if it is a case where the end surface 13b is formed in the position of any large diameter part 66B, the protective cover 13B is in the state in which the small diameter part 63B closest to the end surface 13b is in contact with the outer peripheral surface 25a of the cylinder 11. 13b and the outer peripheral surface 25a of the cylinder 11 do not contact in the radial direction.
- the protective cover 13C is partially different from the protective cover 13 of the first embodiment.
- the length adjusting unit 43C is the length of the first embodiment.
- the height adjustment unit 43 is partially different.
- the length adjusting portion 43C is a range of at least a portion of the protective cover 13C on the other end side in the cover axial direction that is opposite to the mounting portion 42 on the one end side in the cover axial direction. Yes.
- the length adjusting portion 43C has a plurality of bulging portions 62C that bulge in a quadrangular pyramid shape inward in the cover radial direction from the inner peripheral surface 61a of the main cylindrical portion 61 similar to the first embodiment. .
- the protruding portion 62C has a curved shape on the protruding tip side.
- the bulging portion 62C has the center in the cover axial direction and the center in the cover circumferential direction most protruding from the inner peripheral surface 61a, and the protruding amount from the inner peripheral surface 61a is smaller on both sides in the cover axial direction.
- the protrusion amount from the inner peripheral surface 61a is smaller.
- the bulging portion 62 ⁇ / b> C has a substantially constant thickness, and is therefore recessed inward in the cover radial direction from the outer peripheral surface 61 b of the main cylinder portion 61.
- the bulging portion 62C has a rhombus shape that is long in the circumferential direction of the cover when viewed along the cover radial direction, and the plurality of bulging portions 62C are all the same size.
- the bulging portion 62C is disposed at the same position as the bulging portion 62 of the first embodiment.
- the bulging tip positions in other words, the center position in the cover axial direction
- the virtual circle connecting them has the smallest diameter in the length adjusting portion 43C.
- This portion of each bulging portion 62C constitutes a small diameter portion 66C.
- the one end side in the cover axial direction where the attachment portion 42 is formed rather than the small diameter portions 66C of the plurality of bulged portions 62C that are aligned in the cover axial direction is closer to the smaller diameter portion 66C side in the diameter of the virtual circle connecting them.
- each bulging portion 62C constitutes a reduced diameter portion 67C.
- the other end side in the cover axial direction opposite to the attachment portion 42 is closer to the other end side than the small diameter portion 66C of the plurality of bulged portions 62C in which the positions in the cover axial direction match. It has a large diameter, and this portion of each bulging portion 62C constitutes an enlarged diameter portion 68C.
- the protective cover 13C of the fourth embodiment is also formed in the same manner as in the first embodiment, and its end surface 13b is a surface cut in a direction orthogonal to the cover axial direction at a position other than the small diameter portion 66C of the length adjusting portion 43C. Specifically, it is constituted by a surface cut in a direction perpendicular to the cover axial direction at a position other than the bulging portion 62C, that is, at the position of the same diameter portion 63.
- the end surface 13b and the outer peripheral surface 25a of the cylinder 11 do not contact in the radial direction when the small diameter portion 66C closest to the end surface 13b is in contact with the outer peripheral surface 25a of the cylinder 11 (see FIG. 1). .
- the protective cover 13C is also formed with a plurality of the same-diameter portions 63 at intervals in the cover axial direction, and the position of the end surface 13b formed by cutting is selectively determined from among the plurality of the same-diameter portions 63. It is like that. And even if it is a case where the end surface 13b is formed in the position of any same diameter part 63, the protective cover 13C is in the state where the small diameter part 66C closest to the end surface 13b is in contact with the outer peripheral surface 25a of the cylinder 11. 13b and the outer peripheral surface 25a of the cylinder 11 do not contact in the radial direction.
- the bulging portion 62C of the fourth embodiment can be changed to a bulging portion that is continuous in the cover circumferential direction as in the second embodiment with respect to the first embodiment.
- the bulging portion has a shape in which two circular tapered surfaces connect the small diameter sides.
- the present invention is not limited to this, for example, As illustrated in FIG. 8 as a modification to the first embodiment, it is possible to reduce the number of rows of the bulging portions 62 arranged at intervals in the cover axis direction, or to increase them. If the number of rows of the bulging portions 62 is reduced, the length of the same-diameter portion 63 can be increased, so that cutting at the position of the same-diameter portion 63 becomes easier.
- the protective cover 13 may be made of a material such as metal. Even when the protective cover is made of metal, it is not necessary to have multiple types of molds according to the difference in the axial length of the protective cover, and there is no time for setup change to replace the molds. Can be improved. When a metal is used, the protective cover does not normally swing, but there is a case where the protective cover swings on an extremely bad road or the like, and this embodiment is effective for a vehicle used in such a severe area.
- the embodiment described above includes a cylinder and a rod extending from the cylinder, and a cylinder-shaped protective cover that covers the rod and the cylinder is attached to the rod.
- a mounting portion that is attached to the rod side is provided on one end side in the axial direction, and at least the other axial end side of the protective cover has a reduced diameter portion that decreases in diameter toward the distal end side of the other end, Expanded portions with a diameter increasing toward the tip side of the other end are alternately formed in the axial direction via a small diameter portion therebetween, and the end surface on the other end side of the protective cover is other than the small diameter portion
- the end surface and the outer peripheral surface of the cylinder are in a position that does not contact in the radial direction in a state where the small diameter portion closest to the end surface is in contact with the outer peripheral surface of the cylinder.
- the protective cover is formed of a resin material, it is highly effective to adopt the above configuration.
- the protective cover is provided with a same-diameter portion that is larger in diameter than the small-diameter portion and extends in the axial direction between the enlarged-diameter portion and the reduced-diameter portion. This is facilitated by cutting for adjusting the length at the diameter.
- the protective cover is formed by blow molding, it can be easily formed in the above shape.
- the quality can be improved.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
本発明の第1実施形態を図1~図4を参照して以下に説明する。
次に、第2実施形態を主に図5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。なお、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。
次に、第3実施形態を主に図6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。なお、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。
次に、第4実施形態を主に図7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。なお、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。
11 シリンダ
12 ロッド
13,13A,13B,13C 保護カバー
13b 端面
63B 小径部
66,66A,66C 小径部
25a 外周面
42 取付部
67 縮径部
68 拡径部
63 同径部
Claims (7)
- シリンダと、
該シリンダから延出するロッドと、を備え、
前記ロッド側に該ロッドおよび前記シリンダを覆う筒状の保護カバーが取り付けられているシリンダ装置において、
前記保護カバーの軸方向一端側には前記ロッド側に取り付けられる取付部が設けられ、
前記保護カバーの少なくとも軸方向他端側には、該他端の先端側に向けて径が小さくなる縮径部と、前記他端の先端側に向けて径が大きくなる拡径部とが、間に小径部を介して軸方向に交互に形成され、
前記保護カバーの前記他端側の端面は、前記小径部以外の位置で切断された面で構成され、
前記端面に最も近い前記小径部が前記シリンダの外周面に当接した状態で、前記端面と前記シリンダの外周面とは径方向に接触しない位置にある
シリンダ装置。 - 前記保護カバーは、樹脂材により形成されている請求項1に記載のシリンダ装置。
- 前記保護カバーの前記取付部は、前記ロッド側に対し揺動可能に嵌合されている請求項1または2に記載のシリンダ装置。
- 前記保護カバーの少なくとも前記他端側は、柔軟性を持って曲がり可能である請求項1乃至3のいずれか一項に記載のシリンダ装置。
- 前記保護カバーには、前記拡径部と前記縮径部との間に、前記小径部よりも大径であって軸方向に同径で延びる同径部が設けられている請求項1乃至4のいずれか一項に記載のシリンダ装置。
- 前記小径部は、周方向に部分的に複数設けられている請求項1乃至5のいずれか一項に記載のシリンダ装置。
- 前記保護カバーは、ブロー成形で形成されている請求項1乃至6のいずれか一項に記載のシリンダ装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015562584A JP6268199B2 (ja) | 2014-02-12 | 2014-02-12 | シリンダ装置の製造方法 |
DE112014006357.6T DE112014006357T5 (de) | 2014-02-12 | 2014-02-12 | Zylindervorrichtung |
US15/118,347 US9976623B2 (en) | 2014-02-12 | 2014-02-12 | Cylinder device |
CN201480075456.2A CN105980731B (zh) | 2014-02-12 | 2014-02-12 | 缸体装置 |
KR1020167021876A KR20160122722A (ko) | 2014-02-12 | 2014-02-12 | 실린더 장치 |
PCT/JP2014/053174 WO2015121922A1 (ja) | 2014-02-12 | 2014-02-12 | シリンダ装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2014/053174 WO2015121922A1 (ja) | 2014-02-12 | 2014-02-12 | シリンダ装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015121922A1 true WO2015121922A1 (ja) | 2015-08-20 |
Family
ID=53799692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/053174 WO2015121922A1 (ja) | 2014-02-12 | 2014-02-12 | シリンダ装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9976623B2 (ja) |
JP (1) | JP6268199B2 (ja) |
KR (1) | KR20160122722A (ja) |
CN (1) | CN105980731B (ja) |
DE (1) | DE112014006357T5 (ja) |
WO (1) | WO2015121922A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021117706A1 (ja) * | 2019-12-11 | 2021-06-17 | 日立Astemo株式会社 | 緩衝器 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11149814B2 (en) | 2019-01-25 | 2021-10-19 | Tenneco Automotive Operating Company Inc. | Cover system for damper |
WO2021077171A1 (en) | 2019-10-25 | 2021-04-29 | Chromeguard Pty Ltd | A hydraulic cylinder piston rod protection system |
US11940033B2 (en) * | 2021-10-22 | 2024-03-26 | DRiV Automotive Inc. | Two piece plastic dirt shield for shock absorbers |
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DE2920575C2 (de) | 1979-05-21 | 1981-09-17 | Siemens AG, 1000 Berlin und 8000 München | Digital-Fernmeldesystem mit mindestens einem Vierdrahtleitungsabschnitt |
JPS6116439U (ja) * | 1984-07-04 | 1986-01-30 | マツダ株式会社 | 自動車用ダンパのダストカバ− |
JP3989058B2 (ja) * | 1997-08-05 | 2007-10-10 | 株式会社ショーワ | ダストカバー取付構造 |
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JP4883279B2 (ja) * | 2006-03-17 | 2012-02-22 | 日立オートモティブシステムズ株式会社 | シリンダ装置 |
JP4844885B2 (ja) * | 2006-08-25 | 2011-12-28 | 日立オートモティブシステムズ株式会社 | シリンダ装置およびその製造方法 |
JP2011074996A (ja) * | 2009-09-30 | 2011-04-14 | Hitachi Automotive Systems Ltd | シリンダ装置 |
JP5693391B2 (ja) * | 2011-06-14 | 2015-04-01 | 株式会社ショーワ | カバー部材および懸架装置 |
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 |
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- 2014-02-12 JP JP2015562584A patent/JP6268199B2/ja not_active Expired - Fee Related
- 2014-02-12 WO PCT/JP2014/053174 patent/WO2015121922A1/ja active Application Filing
- 2014-02-12 CN CN201480075456.2A patent/CN105980731B/zh not_active Expired - Fee Related
- 2014-02-12 US US15/118,347 patent/US9976623B2/en not_active Expired - Fee Related
- 2014-02-12 DE DE112014006357.6T patent/DE112014006357T5/de not_active Withdrawn
- 2014-02-12 KR KR1020167021876A patent/KR20160122722A/ko not_active Application Discontinuation
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JPS55154838U (ja) * | 1979-04-23 | 1980-11-07 | ||
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JP2006248401A (ja) * | 2005-03-11 | 2006-09-21 | Tokai Rubber Ind Ltd | ショックアブソーバの弾性連結装置 |
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JP7220306B2 (ja) | 2019-12-11 | 2023-02-09 | 日立Astemo株式会社 | 緩衝器 |
Also Published As
Publication number | Publication date |
---|---|
CN105980731B (zh) | 2018-04-27 |
US9976623B2 (en) | 2018-05-22 |
DE112014006357T5 (de) | 2016-10-27 |
US20170175841A1 (en) | 2017-06-22 |
KR20160122722A (ko) | 2016-10-24 |
CN105980731A (zh) | 2016-09-28 |
JP6268199B2 (ja) | 2018-01-24 |
JPWO2015121922A1 (ja) | 2017-03-30 |
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