CN112567151A - Buffer block, buffer, and method for manufacturing buffer block - Google Patents
Buffer block, buffer, and method for manufacturing buffer block Download PDFInfo
- Publication number
- CN112567151A CN112567151A CN201980035372.9A CN201980035372A CN112567151A CN 112567151 A CN112567151 A CN 112567151A CN 201980035372 A CN201980035372 A CN 201980035372A CN 112567151 A CN112567151 A CN 112567151A
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- Prior art keywords
- cushion block
- annular groove
- cylindrical portion
- top portion
- buffer block
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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
- F16F9/58—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
Abstract
The cushion block (1) is provided with an annular top part (2), a cylindrical part (3) arranged on the outer periphery of the top part (2), and a connecting part (4) which is integrally formed by synthetic resin and has an annular groove (4a) for surrounding the outer periphery of the top part (2) at the inner side while connecting the top part (2) and the cylindrical part (3), and is configured in such a manner that the wall thickness (T1) from the bottom of the annular groove (4a) in the connecting part (4) to the outer side of the connecting part (4) is thinner than the minimum wall thickness (T2) in the top part (2).
Description
Technical Field
The invention relates to a buffer block, a buffer and a manufacturing method of the buffer block.
Background
Conventionally, a shock absorber includes an outer tube, a rod inserted into the outer tube so as to be freely inserted into and removed from the outer tube, a rubber for a shock absorber provided on the rod side, and a shock absorber provided at an end portion of the outer tube.
In such a shock absorber, when the rod is inserted into the deepest part of the outer tube, that is, in the most contracted state, the rubber for the cushion block is compressed after colliding with the cushion block, and the rubber for the cushion block exerts an elastic force, thereby alleviating the impact when the shock absorber is in the most contracted state.
The cushion block is provided with a cylindrical part which is embedded in the outer periphery of the end part of the outer pipe and has a perfect circular cross section, and an annular stop part which is arranged at the top of the cylindrical part and allows the bar surface to insert the cushion rubber, and is embedded in the outer periphery of the end part of the outer pipe.
More specifically, for example, as disclosed in JP2007-57088A, the buffer block is provided with a plurality of ribs arranged in the circumferential direction and provided on the inner periphery of the cylindrical portion, and the ribs are pressed against the outer periphery of the outer tube, thereby pressing and fixing the outer tube to the outer tube. That is, the conventional buffer block is fixed to the outer tube by press-fitting, thereby preventing it from falling off the outer tube.
Therefore, if the diameter of the cylindrical portion is reduced and the pressing force is increased, the buffer block can be firmly fixed to the outer tube, but when the buffer block is pressed against the outer periphery of the end portion of the outer tube, the buffer block may be broken due to a large stress acting on the joint portion between the top portion and the cylindrical portion. Therefore, in the conventional cushion block, an annular groove is provided on an outer peripheral portion of the top inner surface to relax stress concentrated on the joint portion.
Summary of The Invention
Such a conventional cushion block is integrally molded of synthetic resin, and as shown in fig. 6, in a mold 100 for molding the cushion block, there is a case where synthetic resin is injected from a position corresponding to the top inner periphery of the mold 100 and molded.
Since the cushion block has a plurality of ribs in the cylindrical portion, the gap corresponding to the cylindrical portion in the mold 100 for forming and producing the cushion block is wider at the portion corresponding to the ribs and narrower at the portions other than the portions corresponding to the ribs as viewed in the circumferential direction.
When the synthetic resin is injected into the mold 100, the synthetic resin rapidly enters a wide portion within the mold 100, but it takes time to enter a narrow portion. Therefore, in the narrow portion in the mold 100, the synthetic resin spreads from the wide portion while cooling to form a flow of the synthetic resin, and therefore a weld line is generated at a portion where the thickness of the cylindrical portion of the cushion block to be formed is thin.
Since the portion where the weld line is generated is weak in strength, if the weld line is generated in a portion where the cylindrical portion of the buffer block is thin, the buffer block may be broken when the buffer block is pressed into the outer tube.
The object of the invention is therefore: to provide a buffer block which can prevent breakage when it is attached to the outer periphery of the end portion of an outer tube, and a buffer provided with such a buffer block; also provided is a method for manufacturing the buffer block, which can prevent the buffer block from cracking when the buffer block is mounted on the outer periphery of the end part of the outer tube.
In order to solve the above-described object, a cushion block according to the present invention includes an annular top portion, a cylindrical portion disposed on an outer periphery of the top portion, and a connecting portion integrally formed of a synthetic resin and having an annular groove on an inner side thereof for surrounding an outer periphery of the top portion, and is configured such that a wall thickness from a bottom of the annular groove in the connecting portion to an outer side of the connecting portion is thinner than a minimum wall thickness in the top portion.
Drawings
Fig. 1 is a side view of a shock absorber including a shock absorbing block according to an embodiment of the present invention.
Fig. 2 is an enlarged sectional view of a buffer block in an embodiment of the present invention.
Fig. 3 is an enlarged bottom view of a buffer block in an embodiment of the present invention.
Fig. 4(a) is a diagram for explaining the flow of the synthetic resin injected into the mold for molding the buffer block in the embodiment of the present invention. Fig. 4(b) is a view for explaining the subsequent flow of the synthetic resin injected into the mold for molding the buffer block in the embodiment of the present invention.
Fig. 5 is a partially enlarged sectional view of a buffer block in a modification of the embodiment of the present invention.
Fig. 6 is a diagram for explaining a process of manufacturing a conventional buffer block.
Detailed Description
The present invention will be described below with reference to embodiments shown in the drawings. As shown in fig. 1, a cushion block 1 of an embodiment is mounted on an outer peripheral end portion of an outer tube 10 in a bumper D, facing a cushion rubber 13 mounted on a front end of a rod 11 of the bumper D. Further, when the shock absorber D contracts to the preset position, the cushion block 1 abuts on the lower end of the cushion rubber 13 in fig. 1, compresses the cushion rubber 13, and causes the cushion rubber 13 to exert the elastic force for suppressing the contraction of the shock absorber D. In this way, the cushion block 1 cooperates with the cushion rubber 13 to alleviate the impact when the bumper D is in the most contracted state.
The buffer D includes: a damper body 9 including a cylindrical outer tube 10, a rod 11 inserted into the outer tube 10 so as to be freely inserted thereinto and withdrawn therefrom, and a damper block 1; and exerts a damping force when the rod 11 is moved and contracted in the axial direction with respect to the outer tube 10. Further, the cushion block 1 is mounted at the outer periphery of the end portion of the outer tube 10 at the upper side in fig. 1 by press-fitting.
Although not shown in detail in the drawings, the shock absorber D includes a cylinder for being accommodated in the outer tube 10, and a piston connected to the rod 11 and movably inserted into the cylinder to divide the cylinder into an expansion-side chamber and a compression-side chamber, and a reservoir is provided between the cylinder and the outer tube 10. Further, the liquid reservoir is filled with a liquid and a gas in addition to the liquid in the extension-side chamber and the compression-side chamber. Further, the shock absorber D is provided with a passage for communicating the expansion-side chamber and the compression-side chamber, and a passage for communicating the compression-side chamber and the reservoir, and a damping valve or a check valve for exerting a damping force is appropriately provided in these passages. When the shock absorber D configured in this manner extends, the damping valve exerts a damping force to damp the extension by applying a resistance to the flow of the liquid flowing from the contracted extension-side chamber to the expanded compression-side chamber. In contrast, when the shock absorber D is contracting, the rod 11 enters the inside of the cylinder and pushes out the liquid from the cylinder, and the damping valve exerts a damping force for damping contraction by applying resistance to the flow of the liquid flowing from the compression-side chamber to the reservoir.
In the above description, the damper D has been described as a multi-cylinder damper, but the damper D is not limited to the multi-cylinder damper, and the rod 11 may exert a damping force when it moves in and out of the outer tube 10. Therefore, the damper D may also be a single cylinder (single tube) type damper in which a piston is directly inserted into the outer tube 10 and an extension-side chamber and a compression-side chamber are provided in the outer tube 10. Further, the bumper D may be a single-rod type bumper or a double-rod type bumper. In addition, the liquid used in the damper D may be a liquid such as a magnetorheological fluid, an electrorheological fluid, water, or an aqueous solution, in addition to the hydraulic oil, and in the case of using a magnetorheological fluid or an electrorheological fluid, a device that applies a magnetic field or an electric field to the passage may be used instead of the damper valve.
Further, a cylindrical cushion rubber 13 is attached to the outer periphery of the front end of the rod 11. As shown in fig. 1, the cushion rubber 13 is formed of synthetic resin, rubber, or the like, has a cylindrical shape with corrugations, and faces the cushion block 1 at the lower end in fig. 1.
The cushion block 1 is made of synthetic resin in the present embodiment, and as shown in fig. 1 to 3, includes: a circular top 2 having a rod 11 inserted into the inner periphery thereof; a cylindrical portion 3 disposed on the outer periphery of the top portion 2; and a connection part 4 provided with an annular groove 4a at an inner side while connecting the top part 2 and the cylindrical part 3.
When the cushion block 1 presses the cylindrical portion 3 to the outer periphery of the end portion of the outer tube 10 in the bumper D and is mounted on the outer tube 10, the top portion 2 faces the lower end of the cushion rubber 13. Further, when the shock absorber D is in the most contracted state, the cushion block 1 abuts on the cushion rubber 13, compresses the cushion rubber 13 and causes the cushion rubber 13 to exert an elastic force for suppressing the contraction of the shock absorber D.
Next, the buffer block 1 will be described in detail. The top portion 2 has an annular shape and includes a plurality of protrusions 2a provided at equal intervals in the circumferential direction on the inner side, i.e., on the lower end in fig. 2. In the present embodiment, 6 projections 2a are provided on the top 2, but the number of the projections 2a provided is arbitrary. When the cushion block 1 is mounted to the outer tube 10, the protrusions 2a abut on the outer tube 10 and are positioned outside the top 2, i.e., at the upper end in fig. 1. If the protrusions 2a are provided in this manner, when the top 2 abuts against the cushion rubber 13 at the upper end in fig. 1, the cushion rubber 13 can be prevented from interfering with the sealing member 14 for sealing the outer periphery of the rod 11 of the bumper D on the inner periphery of the top 2. Further, when the protrusions 2a are provided, the wall thickness of the top portion 2 can be partially thickened, so that this is advantageous in terms of strength.
Further, a plurality of ribs 3a are provided inside the cylindrical portion 3 at equal intervals in the circumferential direction. The ribs 3a are provided on the cylindrical portion 3 in 6 numbers, and are provided at positions overlapping the protrusions 2a in the radial direction. In addition, the number of the ribs 3a is arbitrary, and may also be provided between the protrusions 2a and 2a as viewed in the circumferential direction. In this way, if the rib 3a is provided inside the cylindrical portion 3, when the rib 3a is press-fitted to the outer periphery of the outer tube 10, the rib 3a abuts against the outer periphery of the outer tube 10, and the press-fitting operation is facilitated even if the pressing force of the cushion block 1 against the outer tube 10 is increased.
Further, as shown in fig. 2, the top portion 2 and the cylindrical portion 3 are connected by a connecting portion 4 for connecting the outer periphery of the top portion 2 and the upper end of the cylindrical portion 3. The connecting portion 4 is a portion that is just in contact with the shoulder portion of the cushion block 1, and is located between the top portion 2 and the cylindrical portion 3. This connecting portion 4 is provided with an annular groove 4a so as to surround the outer periphery of the top portion 2 on the inner side facing the cushion block 1. Also, the wall thickness T1 from the bottom of this annular groove 4a to the outside of the connecting portion 4 is thinner than the minimum wall thickness T2 in the top portion. In the present embodiment, the minimum thickness of the cylindrical portion 3 is a portion other than the rib 3a of the cylindrical portion 3 as shown by the broken line in fig. 2, but the thickness T1 from the bottom of the annular groove 4a to the outside of the connecting portion 4 is equal to or less than the minimum thickness T3 of the cylindrical portion 3. In the present embodiment, the annular recessed groove 4a has an annular shape as shown in fig. 3, but may have a shape other than an annular shape as long as it surrounds the outer periphery of the ceiling portion 2.
As shown in fig. 4, the cushion block 1 configured in this manner is molded by injecting synthetic resin into a mold M. The die M has a gap inside that conforms to the outer shape of the cushion block 1, and is divided into a plurality of parts, although not shown. Further, in forming the cushion block 1, for easy understanding, in fig. 4, the left half shows a cross section of a portion where the rib 3a of the cylindrical portion 3 in the mold M is formed, and the right half shows a cross section of a portion other than the rib 3a where the cylindrical portion 3 in the mold M is formed.
When a synthetic resin is injected into the mold M, the top portion 2, the cylindrical portion 3, and the connecting portion 4 are integrally molded, and the cushion block 1 is resin-molded.
As shown in fig. 4, within the mold M, the synthetic resin R is injected from a plurality of positions corresponding to the inner periphery of the top portion 2 in the mold M. The number of positions where the synthetic resin is injected into the mold M is arbitrary, but 3 or more positions are set to suppress the occurrence of weld lines.
When the synthetic resin R is injected into the mold M, as shown in fig. 4(a), first, the synthetic resin R is filled in a portion of the mold M corresponding to the top 2 of the cushion block 1. Further, when the synthetic resin R is injected into the mold M, as shown in fig. 4(b), it is difficult for the synthetic resin R to pass through the narrow gap S1 corresponding to the annular groove 4a of the connecting portion 4, and therefore the synthetic resin R will be blocked by the narrow gap at one end, but when the synthetic resin R enters the wide gap corresponding to the cylindrical portion 3 after passing through the narrow gap, it can quickly fill the gap. In this way, the synthetic resin R is extruded through the narrow gap S1 corresponding to the annular groove 4a of the die M, and is filled in the gap corresponding to the cylindrical portion 3. Therefore, the synthetic resin R can be quickly filled into the wide gap S2 corresponding to the rib 3a in the cylindrical portion 3 in the mold M and the gap S3 narrower than the gap S2 corresponding to the portion other than the rib 3 a. That is, since the annular groove 4a is provided in the connecting portion 4 between the top portion 2 and the cylindrical portion 3 of the cushion block 1 to provide a portion having a wall thickness thinner than the minimum wall thickness of the top portion 2, a narrow gap S1 is provided at a portion corresponding to the connecting portion 4 in the mold M for exerting a squeezing action on the synthetic resin R injected into the mold M. Thus, as described above, the synthetic resin R can be quickly filled into not only the space S2 corresponding to the rib 3a but also the space S3 corresponding to the portion other than the rib 3a in the space corresponding to the portion of the mold M corresponding to the cylindrical portion 3. Therefore, in the narrow gap S3 corresponding to the portion of the cylindrical portion 3 other than the rib 3a in the mold M, not only the gap S1 but also the synthetic resin R can be prevented from flowing into the wide gap S2 corresponding to the rib 3a, and the weld line can be prevented from being generated in the thin portion of the cylindrical portion 3.
In this way, the cushion block 1 includes the annular apex portion 2, the cylindrical portion 3 disposed on the outer periphery of the apex portion 2, and the connecting portion 4 having the annular groove 4a on the inner side for surrounding the outer periphery of the apex portion 2 while connecting the apex portion 2 and the cylindrical portion 3, and is integrally molded from a synthetic resin, and is configured such that the wall thickness T1 from the bottom of the annular groove 4a in the connecting portion 4 to the outside of the connecting portion 4 is thinner than the minimum wall thickness T2 in the apex portion 2.
The cushion block 1 configured in this way can prevent a weld line from being generated in a thin portion of the cylindrical portion 3 other than the rib 3a when resin molding is performed by the mold M. Further, since the cushion block 1 configured in this way can prevent the generation of a weld line in the cylindrical portion 3, there is no fear of the cylindrical portion 3 breaking even if the pressing force of the cylindrical portion 3 on the outer tube 10 is increased. Further, since the connection portion 4 is provided with the annular groove 4a, the connection portion 4 can be flexibly deformed when the cylindrical portion 3 is press-fitted to the outer periphery of the outer tube 10, and therefore, even if the pressing force of the cylindrical portion 3 on the outer tube 10 is increased, there is no fear that the connection portion 4 is broken. Therefore, according to the buffer block 1 of the present invention, it is possible to prevent the occurrence of breakage when it is mounted on the outer periphery of the end portion of the outer tube 10. Further, according to the damper D including the damper block 1, it is possible to prevent the damper block 1 from being broken when being attached to the outer periphery of the end portion of the outer tube 10.
When the cushion block 1 is press-fitted into the outer tube 10, the rib 3a may rub against the outer periphery of the outer tube 10, thereby generating chips. However, in the cushion block 1 of the present invention, since the annular groove 4a is provided inside the connecting portion 4, the chips can be accommodated in the annular groove 4a, and the chips can be prevented from biting between the top portion 2 and the outer tube 10.
As shown in fig. 2 and 3, the annular groove 4a is formed in the vertical direction, but is not limited thereto. That is, if the shortest distance between the bottom of the annular groove 4a and the outside of the connecting portion 4 is smaller than the minimum wall thickness of the top portion 2, when the cushion block 1 is molded with the mold M, a squeezing effect can be obtained, and the synthetic resin R can be quickly filled into the entire cylindrical portion 3. Therefore, as shown by a solid line or a broken line in fig. 5, the annular groove 4a may be formed in a horizontal direction or an oblique direction with respect to the cushion block 1.
In the cushion block 1 of the present embodiment, the thickness T1 from the bottom of the annular groove 4a to the outside of the connecting portion 4 is equal to or less than the minimum thickness T3 in the cylindrical portion 3. In this way, the narrow gap S3 corresponding to the portion of the cylindrical portion 3 other than the rib 3a in the mold M is the same as or wider than the gap S1 corresponding to the portion where the annular groove 4a in the mold M is provided, and therefore, the synthetic resin R can be filled into the gap S3 more quickly. According to the cushion block 1 configured in this manner, the generation of the weld line in the cylindrical portion 3 can be effectively suppressed, and therefore, the strength of the cylindrical portion 3 is improved.
Further, in the cushion block 1 of the present embodiment, the top portion 2 has a plurality of protrusions 2a arranged in the inner circumferential direction, and the cylindrical portion 3 has a plurality of ribs 3a arranged in the inner circumferential direction. Since the bumper 1 configured in this manner is provided with the protrusions 2a and the ribs 3a, even if the pressing force is increased while the strength of the bumper 1 is increased, the portion of the cylindrical portion 3 other than the ribs 3a is easily deformed, and the press-fitting operation is facilitated.
Further, with the cushion block 1 of the present embodiment, since the projection 2a and the rib 3a are provided at positions overlapping in the radial direction, the projection 2a and the rib 3a do not hinder the water, dust, or the like that enters the annular groove 4a from being discharged from the annular groove 4 a. When the protrusions 2a and the ribs 3a are alternately arranged in the circumferential direction, the shape of the annular groove needs to avoid the protrusions 2a and the ribs 3a, and therefore, a beautiful annular shape cannot be formed, and water or dust entering the annular groove 4a is difficult to be discharged, whereas in the cushion block 1 of the present embodiment, water or dust entering the annular groove 4a can be quickly discharged.
Further, in the method of manufacturing the cushion block 1 of the present invention, the synthetic resin R is injected from a position corresponding to the inner circumference of the ceiling portion 2 of the mold M in which the cushion block 1 is formed, and the cushion block 1 is integrally formed by the synthetic resin R, wherein the cushion block 1 includes the annular ceiling portion 2, the cylindrical portion 3 disposed on the outer circumference of the ceiling portion 2, and the connecting portion 4 having the annular groove 4a provided along the outer circumference of the ceiling portion 2 on the inner side while connecting the ceiling portion 2 and the cylindrical portion 3, and the wall thickness of the cushion block 1 from the bottom of the annular groove 4a in the connecting portion 4 to the outside of the connecting portion 4 is thinner than the minimum wall thickness in the ceiling portion 2. In the manufacturing method of the cushion block 1 of the present invention, when the synthetic resin R is injected from a position corresponding to the inner periphery of the top portion 2 of the mold M, the synthetic resin R passes through the narrow gap S1 corresponding to the annular groove 4a of the connecting portion 4 of the mold M during reaching the cylindrical portion 3, so the gap S1 can exert a squeezing action, and the synthetic resin R can be quickly filled into the entire cylindrical portion 3. Therefore, according to the method of manufacturing the cushion block 1 of the present invention, the cushion block 1 can be resin-molded without generating a weld line in the cylindrical portion 3.
While the preferred embodiments of the present invention have been illustrated and described in detail, modifications, variations and changes may be made without departing from the scope of the claims.
This application claims priority based on Japanese patent application Ser. No. 2018-160268 filed by 29.8.2018 to the present patent office, the entire contents of which are incorporated herein by reference.
Claims (6)
1. A cushion block is integrally formed of a synthetic resin,
which is provided with a circular ring-shaped top part,
A cylindrical portion disposed on the outer periphery of the top portion,
And a connecting portion having an annular groove on an inner side for surrounding an outer periphery of the top portion while connecting the top portion and the cylindrical portion,
and a wall thickness from a bottom of the annular groove in the connecting portion to an outside of the connecting portion is thinner than a minimum wall thickness in the top portion.
2. The buffer block according to claim 1, wherein,
wherein the content of the first and second substances,
the wall thickness from the bottom of the annular groove in the connecting portion to the outside of the connecting portion is equal to or less than the minimum wall thickness in the cylindrical portion.
3. The buffer block according to claim 1, wherein,
wherein the content of the first and second substances,
the top portion has a plurality of protrusions arranged circumferentially on the inside,
the cylindrical portion has a plurality of ribs arranged in a circumferential direction inside.
4. The buffer block of claim 3,
the projection and the rib are provided at positions overlapping in the radial direction.
5. A buffer is provided with:
a damper main body having an outer tube and a rod that moves in and out of the outer tube, and exerting a damping force when the rod moves in and out of the outer tube;
and a buffer block according to claim 1.
6. A method for manufacturing a buffer block is provided,
the method is characterized in that: injecting synthetic resin into a mold for molding a cushion block from a position corresponding to an inner periphery of the top portion of the mold, and integrally molding the cushion block with the resin, wherein the cushion block comprises: the buffer block includes an annular top portion, a cylindrical portion disposed on an outer periphery of the top portion, and a connecting portion connecting the top portion and the cylindrical portion and having an annular groove formed along an outer periphery of the top portion on an inner side, and a wall thickness of the buffer block from a bottom of the annular groove in the connecting portion to an outer side of the connecting portion is thinner than a minimum wall thickness in the top portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018160268A JP6689332B2 (en) | 2018-08-29 | 2018-08-29 | Bump stopper, shock absorber, and bump stopper manufacturing method |
| JP2018-160268 | 2018-08-29 | ||
| PCT/JP2019/016840 WO2020044651A1 (en) | 2018-08-29 | 2019-04-19 | Bump stopper, damper, and method for manufacturing bump stopper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112567151A true CN112567151A (en) | 2021-03-26 |
| CN112567151B CN112567151B (en) | 2022-11-08 |
Family
ID=69645085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980035372.9A Active CN112567151B (en) | 2018-08-29 | 2019-04-19 | Buffer block, buffer, and method for manufacturing buffer block |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6689332B2 (en) |
| CN (1) | CN112567151B (en) |
| WO (1) | WO2020044651A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024009646A1 (en) * | 2022-07-08 | 2024-01-11 | 日立Astemo株式会社 | Bumper cap, and shock absorber |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007009968A (en) * | 2005-06-29 | 2007-01-18 | Kayaba Ind Co Ltd | Cushioning structure |
| JP2007057088A (en) * | 2005-07-29 | 2007-03-08 | Hitachi Ltd | Cylinder device |
| CN102292567A (en) * | 2009-09-29 | 2011-12-21 | 东海橡胶工业株式会社 | Upper support and method for producing same |
| JP2013139864A (en) * | 2012-01-06 | 2013-07-18 | Kyb Co Ltd | Solenoid valve and shock absorber |
| JP2013194833A (en) * | 2012-03-21 | 2013-09-30 | Kyb Co Ltd | Bump stopper |
| CN105437900A (en) * | 2014-09-22 | 2016-03-30 | 丰田自动车株式会社 | Bump stopper cap |
| WO2017010254A1 (en) * | 2015-07-16 | 2017-01-19 | Ｋｙｂ株式会社 | Bump stopper and shock damper |
| CN107143607A (en) * | 2016-03-01 | 2017-09-08 | 住友理工株式会社 | bounce limiter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009222223A (en) * | 2008-02-22 | 2009-10-01 | Showa Corp | Bump cap of hydraulic shock absorber |
| JP6047053B2 (en) * | 2013-03-29 | 2016-12-21 | 株式会社ショーワ | Suspension device and cover member |
-
2018
- 2018-08-29 JP JP2018160268A patent/JP6689332B2/en active Active
-
2019
- 2019-04-19 WO PCT/JP2019/016840 patent/WO2020044651A1/en active Application Filing
- 2019-04-19 CN CN201980035372.9A patent/CN112567151B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007009968A (en) * | 2005-06-29 | 2007-01-18 | Kayaba Ind Co Ltd | Cushioning structure |
| JP2007057088A (en) * | 2005-07-29 | 2007-03-08 | Hitachi Ltd | Cylinder device |
| CN102292567A (en) * | 2009-09-29 | 2011-12-21 | 东海橡胶工业株式会社 | Upper support and method for producing same |
| JP2013139864A (en) * | 2012-01-06 | 2013-07-18 | Kyb Co Ltd | Solenoid valve and shock absorber |
| JP2013194833A (en) * | 2012-03-21 | 2013-09-30 | Kyb Co Ltd | Bump stopper |
| CN105437900A (en) * | 2014-09-22 | 2016-03-30 | 丰田自动车株式会社 | Bump stopper cap |
| WO2017010254A1 (en) * | 2015-07-16 | 2017-01-19 | Ｋｙｂ株式会社 | Bump stopper and shock damper |
| CN107143607A (en) * | 2016-03-01 | 2017-09-08 | 住友理工株式会社 | bounce limiter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020034065A (en) | 2020-03-05 |
| WO2020044651A1 (en) | 2020-03-05 |
| CN112567151B (en) | 2022-11-08 |
| JP6689332B2 (en) | 2020-04-28 |
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