Shock-absorbing device

Abstract

To provide a shock-absorbing device which can achieve a good shock absorbing function.SOLUTION: A shock-absorbing device comprises: a base part; a guide bar that is connected to the base part and extends in an axial direction; a supported body that is disposed along the guide bar and can move relative to the base part in the axial direction; a slider that is fixed to the supported body and can slide in the axial direction relative to the guide bar; and a spring member that biases against movement of the slider. The slider has a bush of which a relative angle relative to an axis can be automatically aligned with the guide bar.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a shock absorber. [Background technology]

[0002] Patent Document 1 discloses an operating device for a gear-type transmission with a buffer function. The operating device includes a fork shaft, a locking member, a shift fork, and a spring means. The fork shaft reciprocates in the axial direction. Two locking members are provided on the outer periphery of the fork shaft, spaced apart from each other in the axial direction. The root portion of the shift fork is supported by the fork shaft so as to be movable in the axial direction between the two locking members, and the tip portion of the shift fork moves a sleeve for switching the transmission gears in the axial direction. A pair of spring means are provided, each interposed between both axial sides of the root portion of the shift fork and each locking member. That is, the fork shaft is sandwiched in the axial direction by a pair of spring means. The pair of spring means elastically positions and holds the shift fork relative to the fork shaft. This suppresses the transmission of impact load between the shaft and the shift fork. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-47230 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the device described in Patent Document 1, when the fork shaft and the shift fork are tilted relative to each other, the fork shaft comes into contact with the hole of the shift fork, and strong friction prevents the fork shaft from moving relative to the axial direction, causing the problem that the shock absorbing function of the spring means is lost.

[0005] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide a shock absorber that can satisfactorily exert its shock absorbent function. [Means for solving the problem]

[0006] In order to solve the above problems, the shock absorber disclosed herein comprises a base, a guide bar connected to the base and extending in an axial direction, a supported body arranged along the guide bar and movable in the axial direction relative to the base, a slider fixed to the supported body and slidable in the axial direction relative to the guide bar, and a spring member that biases against the movement of the slider, and the slider has a bush that can automatically center the relative angle of the guide bar to the axis. Effect of the Invention

[0007] According to the shock absorber of the present disclosure, the shock absorber function can be satisfactorily exhibited. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic configuration diagram of a shock absorber according to a first embodiment of the present disclosure. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] 3 is a cross-sectional view of the slider taken along line III-III in FIG. 2. [Figure 4] FIG. 2 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] 11 is a cross-sectional view of a centering mechanism according to a second embodiment of the present disclosure, as viewed in a circumferential direction about the central axis of the supported body. FIG. [Figure 6] 11 is a cross-sectional view of a centering mechanism according to a second embodiment of the present disclosure, as viewed from the direction of the central axis of the supported body. FIG. [Figure 7] FIG. 11 is a cross-sectional view of a centering mechanism according to a third embodiment of the present disclosure, as viewed in a circumferential direction about the central axis of the supported body. [Figure 8]13 is a cross-sectional view of a centering mechanism according to a third embodiment of the present disclosure, as viewed from the direction of the central axis of the supported body. FIG. [Figure 9] 13 is a cross-sectional view of a centering mechanism according to a modified example of the third embodiment of the present disclosure, as viewed in a circumferential direction about the central axis of the supported body. FIG. [Figure 10] 13 is a cross-sectional view of a centering mechanism according to a modified example of the third embodiment of the present disclosure, as viewed from the direction of the central axis of the supported body. FIG. [Figure 11] FIG. 11 is a cross-sectional view of a centering mechanism according to a fourth embodiment of the present disclosure, as viewed in a circumferential direction about the central axis of the supported body. [Figure 12] 13 is a cross-sectional view of a centering mechanism according to a fourth embodiment of the present disclosure, as viewed from the direction of the central axis of the supported body. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] First Embodiment Hereinafter, a shock absorber 100 according to a first embodiment of the present disclosure will be described with reference to FIGS. The shock absorber 100 is used to absorb shock loads generated in equipment during operation. In this embodiment, the shock absorber 100 is installed in a furnace 1 for coal, oil, waste, etc. The vessel 2 of the furnace 1 is formed, for example, in a rectangular parallelepiped shape. In the vessel 2, deposits due to the accumulation of particles of soot, ash, minerals, and other combustion products and by-products are likely to occur. The deposition of such particles may reduce the processing capacity of the furnace 1 and may cause damage. For this reason, the vessel 2 of this embodiment is provided with a combustion tube (supported body 20 described later). The combustion tube releases a pressure wave into the vessel 2 to remove deposits in the vessel 2 and clean the inside of the vessel 2. When the combustion tube generates a pressure wave, a large shock is generated in the combustion tube due to the recoil. The shock absorber 100 of this embodiment is installed to absorb the shock generated in the combustion tube.

[0010] (Structure of shock absorber) As shown in FIG. 1, the shock absorber 100 includes a base 3, a mounting wall 4, a guide bar 10, a supported body 20, a support mechanism 30, a retaining member 5, a flange 6, a slider 40, a spring member 7, and a centering mechanism 60.

[0011] (base) The base 3 of this embodiment is a wall of the vessel 2 of the furnace 1 described above, and extends in the vertical direction. The base 3 is provided with an opening 3a that penetrates the base 3 in the horizontal direction. The opening 3a is formed in a circular shape.

[0012] (Mounting wall) The mounting wall 4 is disposed outside the container 2 and attached to the base 3. The mounting wall 4 is formed in an annular shape extending in the vertical direction and having an opening 4a penetrating in the horizontal direction. The opening 4a is formed in a circular shape. The center of the opening 4a in the mounting wall 4 coincides with the center of the opening 3a in the base 3 when viewed from the direction of the axis O described below. In addition, the diameter of the opening 4a in the mounting wall 4 is smaller than the diameter of the opening 3a in the base 3.

[0013] (Guide bar) The guide bar 10 is indirectly connected to the base 3 via the mounting wall 4. As shown in Fig. 2, a plurality of guide bars 10 (four in the illustrated example) are provided so as to surround the opening 4a from the outer periphery (the radial outside about the central axis O1 described below). These multiple guide bars 10 are arranged at equal intervals on the same circle C1. That is, the multiple guide bars 10 are arranged at equal intervals in the circumferential direction about the central axis O1.

[0014] The guide bar 10 extends in the direction of its own axis O. The axis O of the guide bar 10 extends in the same direction as the central axis of the opening 3a of the base 3. In the following, the axis O of the guide bar 10 may be simply referred to as the "axis O." Furthermore, unless otherwise specified, the radial direction about the axis O of the guide bar 10 will be simply referred to as the "radial direction," and the circumferential direction about the axis O of the guide bar 10 will be simply referred to as the "circumferential direction."

[0015] The guide bar 10 of this embodiment is formed in the shape of a shaft extending in the direction of an axis O. The guide bar 10 has a guide bar main body 11 and a locking member 12. The guide bar body 11 is formed in a cylindrical shape extending in the direction of the axis O. A fixed end 13 is provided at the end of the guide bar body 11 on the base 3 side in the direction of the axis O. A threaded portion is formed on the outer circumferential surface of the fixed end 13. The fixed end 13 is screwed into the mounting wall portion 4 and the base 3 from the direction of the axis O. In this way, the guide bar 10 is fixed to the base 3.

[0016] The locking members 12 are provided on both sides of the guide bar 10 in the direction of the axis O. That is, two locking members 12 are provided with a gap therebetween in the direction of the axis O. The locking member 12 on the base portion 3 side in the direction of the axis O abuts against the mounting wall portion 4 from the direction of the axis O.

[0017] (supported body) The supported member 20 is disposed along the guide bar 10. The supported member 20 is provided so as to be movable relative to the base 3 in the direction of the axis O.

[0018] The supported member 20 of this embodiment is a combustion tube for pressure wave cleaning the furnace 1 described above. The supported member 20 has a tubular portion 21 and an outer ring 22. The tubular portion 21 is formed in a cylindrical shape extending in the axial line O direction. The supported member 20 is installed horizontally so that the central axis O1 of the tubular portion 21 extends in the axial line O direction. The length of the tubular portion 21 in the axial line O direction is longer than the length of the guide bar 10 in the axial line O direction. The end of the tubular portion 21 on the base 3 side in the axial line O direction is inserted into the opening 4a of the mounting wall portion 4 and the opening 3a of the base 3 and is positioned in the container 2. The outer ring 22 is provided so as to surround the outer peripheral surface of the tubular portion 21 from the outer peripheral side. The outer ring 22 is provided at a position farther away from the base 3 than the two locking members 12 in the axial line O direction.

[0019] (Support mechanism) The support mechanism 30 has a fixture 31 and a wire 32. The fixture 31 is fixed to the upper surface of the tubular portion 21. A plurality of fixtures 31 (two in the illustrated example) are provided at intervals in the direction of the axis O. The number of fixtures 31 can be changed as appropriate. A plurality of fixtures 31 does not have to be provided. The two fixtures 31 are disposed at positions where they sandwich the outer ring 22 of the tubular portion 21 from both sides in the direction of the axis O. The wires 32 extend upward from each fixture 31. The support mechanism 30 suspends and supports the supported object 20 by means of the wires 32.

[0020] (Restraining member) The holding member 5 is provided at an end portion of the guide bar 10 body opposite the base portion 3 in the direction of the axis O, at a position radially overlapping with the outer ring 22 of the supported object 20. The holding member 5 is a so-called shaft holder, and is provided so as to hold down the supported object 20 from the outer periphery. The holding member 5 is disposed with a small gap between it and the outer ring 22, and is provided so as to be slidable relative to the supported object 20.

[0021] (Flange) The flange 6 is formed in an annular shape protruding from the outer circumferential surface of the tubular portion 21. The flange 6 is disposed at a position sandwiched from both sides in the axial direction O by two locking members 12 spaced apart in the axial direction O. Specifically, the flange 6 is provided between the fixture 31 on the base 3 side and the tubular portion 21 of the supported body 20 in the axial direction O. The flange 6 is provided with a plurality of engagement grooves 6a (four in the illustrated example) spaced apart in the circumferential direction about the central axis O1 of the tubular portion 21. Each engagement groove 6a opens radially outward about the central axis O1 of the tubular portion 21.

[0022] (Slider) The slider 40 is fixed to the supported body 20. Furthermore, the slider 40 is provided so as to be slidable in the axis O direction relative to the guide bar 10.

[0023] In this embodiment, one slider 40 is provided for each guide bar 10. That is, a total of four sliders 40 are provided. Each slider 40 is fitted into the fitting groove 6a of the flange 6. As shown in FIG. 3, the slider 40 has a bush 41 and an outer cylinder portion 42.

[0024] (Bush) The bushing 41 is a member having a function of automatically aligning (automatically adjusting) the relative angle θ with respect to the axis O of the guide bar 10. The bushing 41 in this embodiment is a so-called spherical bushing. The bushing 41 has an inner member 43 and an outer member 44. The inner member 43 is an annular member, and is inserted into the guide bar 10. The inner member 43 covers the guide bar 10 from the outer periphery side. The inner member 43 is attached to be slidable in the direction of the axis O relative to the outer periphery of the guide bar 10. Specifically, an inner surface 43a on the radially inner side of the inner member 43 is in slidable contact with the outer periphery of the guide bar 10. The inner member 43 also has a spherical surface 43b formed on the outer periphery side so as to protrude radially outward.

[0025] The outer member 44 is an annular member, and covers the inner member 43 from the outer periphery side. Furthermore, the outer member 44 is attached to the inner member 43 so as to be slidable along a spherical surface 43b. Specifically, an inner surface 44a on the radially inner side of the outer member 44 is in slidable contact with the spherical surface 43b of the inner member 43. By sliding the outer member 44 against the inner member 43, the relative angle θ with respect to the axis O can be automatically aligned. Moreover, the outer member 44 is fixed to the supported body 20 via the flange 6 and an outer cylindrical portion 42 which will be described later.

[0026] The central axis O2 of the outer member 44 is aligned with the axis O of the guide bar 10. The central axis O2 of the outer member 44 extends in the same direction as the central axis O1 of the supported object 20. The outer member 44 is fixed to the supported object 20. Therefore, when the supported object 20 is tilted with respect to the axis O, the outer member 44 is tilted with respect to the axis O at the same relative angle θ as the supported object 20. That is, the relative angle θ between the central axis O2 of the outer member 44 and the axis O of the guide bar 10 is the same as the relative angle between the central axis O1 of the supported object 20 and the axis O of the guide bar 10. In this embodiment, the relative angle θ with respect to the axis O at which the slider 40 can be automatically adjusted means the angle between the central axis O2 of the outer member 44 of the bush 41 and the axis O of the guide bar 10.

[0027] (Outer cylinder part) The outer cylinder portion 42 is a cylindrical member, and covers the outer member 44 of the bushing 41 from the outside in the radial direction. An inner circumferential groove 42a is formed around the entire circumference of the inner circumferential surface of the outer cylindrical portion 42. An outer member 44 of the bushing 41 is fitted into this inner circumferential groove 42a from the inside in the radial direction. The bottom surface of this inner circumferential groove 42a is in contact with an outer surface 44b of the outer member 44 with no gap.

[0028] An outer circumferential groove 42b is formed around the entire periphery of the outer circumferential surface of the outer cylinder portion 42. The slider 40 is fixed to the flange 6 by fitting the outer circumferential groove 42b into the fitting groove 6a of the flange 6. End face grooves 42c are formed on both end faces in the axis O direction of the outer cylindrical portion 42. The end face grooves 42c are formed in a circular shape when viewed from the axis O direction.

[0029] From another perspective, the outer cylinder portion 42 has a main body portion 45 and an attachment piece 46 . The main body portion 45 has a first member 45a, a second member 45b, and a third member 45c. The first member 45a is formed in an annular shape. Both end portions of the first member 45a in the direction of the axis O are located outside the flange 6 in the direction of the axis O, with the flange 6 being used as a reference. An outer circumferential groove 42b is formed in the outer circumferential surface of the first member 45a.

[0030] The second member 45b is formed in an annular shape so as to protrude radially inward from the inner circumferential surface of the first member 45a. The third member 45c is provided on the inner circumferential surface of the second member 45b at an end opposite the base 3 in the direction of the axis O. The third member 45c is formed in an annular shape so as to protrude radially inward from the inner circumferential surface of the second member 45b. One end face groove 42c is formed by the end faces of the second member 45b and the third member 45c opposite the base 3 in the direction of the axis O and the inner circumferential surface of the first member 45a. The first member 45a, the second member 45b, and the third member 45c are integrally formed to form a main body portion 45.

[0031] The attachment piece 46 is attached to an end portion of the main body portion 45 on the base portion 3 side in the direction of the axis O. The attachment piece 46 has a ring portion 46a and a flange portion 46b. The ring portion 46a is an annular member that abuts from the radially inner side against the second member 45b of the main body portion 45. The ring portion 46a protrudes toward the base portion 3 in the axis O direction further than the second member 45b. The flange portion 46b is provided on the outer circumferential surface of the ring portion 46a at an end portion on the base portion 3 side in the direction of the axis O. The flange portion 46b protrudes radially outward from the outer circumferential surface of the ring portion 46a. The flange portion 46b abuts against the second member 45b in the direction of the axis O and abuts against the inner circumferential surface of the first member 45a from the radially inner side. The ring portion 46 a and the flange portion 46 b are integrally formed to form the mounting piece 46 .

[0032] An inner circumferential groove 42a of the outer tube portion 42 is formed by the inner surface of the second member 45b, the end face of the third member 45c facing the base 3 in the direction of axis O, and the end face of the mounting piece 46 opposite the base 3 in the direction of axis O. An end face groove 42c is formed by the inner circumferential surface of the first member 45a and the end face of the mounting piece 46 on the base portion 3 side in the axis O direction.

[0033] The attachment piece 46 is provided so as to be detachable from the main body portion 45 in the direction of the axis O. For example, the attachment piece 46 may be detached from the main body portion 45 when the bushing 41 is fitted into the inner circumferential groove 42a.

[0034] (Spring material) The spring member 7 biases the slider 40 against movement. The spring member 7 in this embodiment is a coil spring that can expand and contract in the direction of the axis O. A guide bar 10 is inserted through the spring member 7. The spring members 7 are provided on both sides of each slider 40 in the direction of the axis O. An end of the spring member 7 on the slider 40 side in the direction of the axis O is fixed in the end face groove 42c of the outer member 44. An end of the spring member 7 on the opposite side to the slider 40 in the direction of the axis O is fixed to the locking member 12.

[0035] When the supported member 20 generates a pressure wave in the direction of the axis O toward the vessel 2 of the furnace 1, an impact load in the direction of the axis O is generated in the supported member 20 due to a reaction. The impact load passes through the load path L as shown in FIG. 3 and is transmitted to the slider 40 and the spring member 7. As a result, the slider 40 moves in the direction of the axis O along the guide bar 10. Then, the spring member 7 expands and contracts in the direction of the axis O, and biases the slider 40 and the supported member 20 in a direction to cancel out the impact load. In this way, the impact load is mitigated.

[0036] (Centering mechanism) As shown in FIG. 4, the centering mechanism 60 is fixed to the base 3 and disposed outside the supported object 20. The centering mechanism 60 is provided so as to be able to contact the supported object 20 from a direction intersecting the axis O direction and to be able to slide in the axis O direction relative to the supported object 20. Specifically, the centering mechanism 60 is fixed to the base 3 via the mounting wall 4. The centering mechanism 60 is also disposed on the outer periphery side of the supported object 20 (outside in the radial direction with respect to the central axis O1), and a plurality of centering mechanisms (four in the illustrated example) are provided around the supported object 20. These centering mechanisms 60 are disposed at equal intervals on the same circle C2. That is, the centering mechanisms 60 are disposed at equal intervals in the circumferential direction with respect to the central axis O1. The circle C2 on which the centering mechanisms 60 are located is located inside the circle C1 on which the above-mentioned guide bars 10 are located. More specifically, the centering mechanisms 60 are provided on both sides of the supported body 20 in the vertical direction and on both sides in the horizontal direction perpendicular to the axis O direction (on both sides of the supported body 20 in the left and right direction).

[0037] (Action and effect) In this embodiment, the shock absorber 100 includes a base 3, a guide bar 10, a supported object 20, a slider 40, and a spring member 7. The guide bar 10 is connected to the base 3 and extends in the direction of the axis O. The supported object 20 is disposed along the guide bar 10 and is provided so as to be movable relative to the base 3 in the direction of the axis O. The slider 40 is fixed to the supported object 20 and is provided so as to be slidable in the direction of the axis O relative to the guide bar 10. The spring member 7 biases the slider 40 against the movement of the slider 40. Furthermore, the slider 40 has a bush 41 that can automatically align a relative angle θ with respect to the axis O with respect to the guide bar 10.

[0038] Since the slider 40 moves in the direction of the axis O along the guide bar 10, it is possible to suppress the displacement of the supported object 20 in a direction intersecting the direction of the axis O. As a result, it is possible to maintain the posture of the supported object 20 while allowing the movement of the supported object 20 in the direction of the axis O. Therefore, it is possible to suppress the supported object 20 and the base 3 from coming into strong contact in a direction intersecting the direction of the axis O. In other words, it is possible to avoid the occurrence of strong friction between the supported object 20 and the base 3. Furthermore, the slider 40 can automatically center the relative angle θ with respect to the axis O with respect to the guide bar 10 by the bush 41. As a result, even if the axis O of the guide bar 10 and the central axis O2 of the slider 40 are not completely parallel, the sliding of the slider 40 is not hindered. Therefore, even if the posture of the supported object 20 is slightly tilted, the slider 40 can move relatively along the guide bar 10, and the spring member 7 can also expand and contract in the direction of the axis O. Therefore, regardless of the posture of the supported body 20, the spring member 7 can bias the supported body 20 in the direction opposite to the impact load, and therefore the shock absorbing function can be satisfactorily exhibited. Furthermore, the self-aligning function of the bushing 41 eliminates the need for alignment adjustment when installing the shock absorber 100. Alternatively, the required accuracy for alignment when installing the shock absorber 100 can be relaxed, and the alignment of the shock absorber 100 can be easily adjusted.

[0039] In this embodiment, the bush 41 has an inner member 43 and an outer member 44. The inner member 43 covers the guide bar 10 from the outer periphery side, is attached to be slidable in the axis O direction relative to the outer periphery surface of the guide bar 10, and has a spherical surface 43b formed on the outer periphery side. The outer member 44 covers the inner member 43 from the outer periphery side, is attached to be slidable along the spherical surface 43b relative to the inner member 43, and is fixed to the supported body 20.

[0040] The inner member 43 is attached to the guide bar 10 so as to be slidable in the direction of the axis O. Therefore, the slider 40 is permitted to move in the direction of the axis O along the guide bar 10. Furthermore, the outer member 44 is permitted to move relative to the inner member 43 along the spherical surface 43b. This allows the bush 41 to automatically adjust the inclination with respect to the axis O. Therefore, even if the supported object 20 is inclined with respect to the axis O, the inclination is automatically absorbed by the outer member 44 sliding along the spherical surface 43b of the inner member 43. In addition, it is possible to suppress the occurrence of local frictional force due to contact between the outer member 44 and the guide bar 10. Therefore, the slider 40 can move smoothly along the guide bar 10.

[0041] In this embodiment, the supported body 20 is formed in a cylindrical shape extending in the axis O direction.

[0042] This makes it easier to arrange the sliders 40 evenly around the supported body 20. This makes it easier to improve the installation accuracy of the shock absorber 100. Furthermore, since the supported body 20 is hollow, the shock absorber 100 can be made lighter.

[0043] In this embodiment, the buffer device 100 further includes a centering mechanism 60 that is fixed to the base 3, is positioned outside the supported body 20, is capable of contacting the supported body 20 from a direction intersecting the axis O direction, and is capable of sliding in the axis O direction relative to the supported body 20.

[0044] This allows the centering mechanism 60 to adjust the posture of the supported body 20 so that it is aligned with the guide bar 10. Furthermore, it is possible to prevent the posture of the supported body 20 from swinging in a direction intersecting the axis O direction. As in this embodiment, when an impact load occurs on the supported object 20 suspended in midair, the supported object 20 vibrates (yawing or pitching) around its center of gravity. In this embodiment, the centering mechanism 60 is fixed to the base 3 where the end of the supported object 20 in the direction of the axis O is located. In other words, the centering mechanism 60 is fixed to a position spaced apart from the center of gravity of the supported object 20 in the direction of the axis O. Therefore, the supported object 20 can effectively suppress vibration around its center of gravity. In addition, the base 3 to which the centering mechanism 60 is fixed is a stable and strong wall portion constituting the vessel 2 of the furnace 1. Therefore, the centering mechanism 60 can receive the contact reaction force caused by the vibration of the supported body 20 with high supporting rigidity.

[0045] In this embodiment, a coil spring is used as the spring member 7. This allows the manufacturing costs of the shock absorber 100 to be reduced.

[0046] <Second embodiment> Hereinafter, a shock absorber 200 according to a second embodiment of the present disclosure will be described with reference to Fig. 5 and Fig. 6. Configurations similar to those in the above-described embodiment will be given similar names and reference numerals, and descriptions thereof will be omitted as appropriate.

[0047] In this embodiment as well, the centering mechanisms 260 are provided on both sides of the supported body 20 in the vertical direction and on both sides in the horizontal direction perpendicular to the axis O direction (both sides in the left and right direction of the supported body 20). The centering mechanisms 260 in this embodiment are so-called leveling blocks. The centering mechanism 260 has a casing 261, a first block 262, a second block 263, a first bolt 264, a second bolt 265, and a sliding portion 270. The casing 261 is fixed to the base 3 via the mounting wall 4. The casing 261 is fixed to an end face of the mounting wall 4 opposite to the base 3 in the direction of the axis O. The casing 261 is formed with a storage recess 261a that opens to the supported body 20 side.

[0048] The first block 262 is stored in the storage recess 261a. The entire first block 262 is disposed in the storage recess 261a. The first block 262 is stored in the storage recess 261a with spaces left on both sides in the direction of the axis O. This allows the first block 262 to move in the direction of the axis O within the storage recess 261a. An inner surface 262a of the first block 262 facing the supported body 20 is formed in a flat shape that gradually approaches the supported body 20 as it approaches the base 3 in the direction of the axis O.

[0049] The second block 263 is stored in the storage recess 261a and placed on the first block 262. Both end faces of the second block 263 in the axis O direction are in contact with the inner side of the storage recess 261a. The second block 263 protrudes from the storage recess 261a toward the supported object 20. The second block 263 has a main body 263a and a protrusion 263b. The main body 263a is placed on the first block 262. An outer surface 263c of the main body 263a facing the opposite side to the supported object 20 is formed in a flat shape that gradually approaches the supported object 20 as it approaches the base 3 in the axis O direction. The outer surface 263c of the main body 263a is formed to follow the inner surface 262a of the first block 262. The protrusion 263b protrudes from the end of the main body 263a on the supported body 20 side in the direction of the axis O opposite to the base 3. The protrusion 263b and the main body 263a are integrally formed to form one second block 263.

[0050] The first bolt 264 is inserted in a direction from the bottom surface of the casing 261 toward the supported body 20 (radially inward with respect to the central axis O1). The first bolt 264 penetrates the casing 261 and the first block 262, and a tip portion thereof is screwed into the second block 263. A thread portion is formed on the outer peripheral surface of the first bolt 264.

[0051] The second bolt 265 is inserted from a side surface of the casing 261 opposite the base 3 in the direction of the axis O in a direction toward the base 3 in the direction of the axis O. The second bolt 265 penetrates the casing 261, and the first bolt 264 is inserted into the tip of the second bolt 265. The second bolt 265 is disposed on both circumferential sides of the first bolt 264 about the central axis O1. A thread portion is formed on the outer circumferential surface of the second bolt 265.

[0052] The sliding part 270 is disposed opposite to the supported object 20. The sliding part 270 is a member that is slidable in the direction of the axis O relative to the supported object 20 and is flexibly deformable. The sliding part 270 in this embodiment is a sliding material 271 that has a lower rigidity than the supported object 20 and is formed in a flat plate shape. An example of the sliding material 271 is PTFE (Poly Tetra Fluoro Ethylene) or the like.

[0053] The surface of the sliding material 271 facing the supported object 20 is formed into a shape that follows the outer circumferential surface of the supported object 20. The sliding material 271 is structured in advance assuming that it will be worn down by sliding with the supported object 20. For example, the thickness t of the sliding material 271 is set to be thick enough to maintain the sliding function of the centering mechanism 260 even if it is worn down by sliding with the supported object 20. Furthermore, a block material that is resistant to wear may be used as the sliding material 271.

[0054] In this embodiment, it is possible to adjust the position of the sliding part 270 with respect to the supported body 20. An example of a method for adjusting the position of the sliding part 270 will be described below. By turning the second bolt 265, the first block 262 moves in the direction of the axis O. This causes the second block 263 to approach or move away from the supported object 20. The sliding part 270 is placed on the second block 263, and therefore moves towards or away from the supported object 20 in conjunction with the second block 263. After the position adjustment of the sliding part 270 is completed, the first bolt 264 is inserted to fix the positions of the first block 262 and the second block 263. This fixes the position of the sliding part 270. Through the above procedure, the position adjustment of the sliding part 270 with respect to the supported object 20 is completed.

[0055] (Action and effect) In the second embodiment, the same configuration as in the first embodiment described above can achieve the same effects. In this embodiment, the centering mechanism 260 may have a sliding portion 270 that is disposed opposite the supported body 20 and is slidable relative to the supported body 20 and is deformable more flexibly than the supported body 20 . This makes it possible to provide the centering mechanism 260 with slidability relative to the supported body 20 with a simple configuration.

[0056] The sliding portion 270 of this embodiment is a sliding material 271 having a lower rigidity than the supported body 20 as in this embodiment. This makes it possible to avoid damage to the supported body 20 when the supported body 20 and the centering mechanism 260 slide against each other.

[0057] <Third embodiment> Hereinafter, a shock absorber 300 according to a third embodiment of the present disclosure will be described with reference to Fig. 7 and Fig. 8. Configurations similar to those in the above-described embodiment will be given similar names and reference numerals, and descriptions thereof will be omitted as appropriate.

[0058] In this embodiment as well, the centering mechanisms 360 are provided on both vertical sides of the supported body 20 and on both horizontal sides (both left and right sides of the supported body 20) perpendicular to the direction of the axis O. In this embodiment, the centering mechanism 360 further has a second spring member 361 in addition to the casing 261, a first block 262, a second block 263, a first bolt 264, a second bolt 265, and a sliding portion 270. In this embodiment, the inner surface of the second block 263 facing the supported body 20 is flush with the inner surface of the casing 261 facing the supported body 20.

[0059] The second spring member 361 biases the sliding portion 270 in a direction intersecting the direction of the axis O relative to the supported object 20. In this embodiment, the second spring member 361 is provided on the outer periphery side of the supported object 20, between the second block 263 and the sliding portion 270. In other words, the second spring member 361 is located on the opposite side to the supported object 20 across the sliding portion 270. The second spring member 361 biases the sliding portion 270, pressing the sliding portion 270 against the supported object 20. Examples of the second spring member 361 include elastic materials such as rubber and urethane, disc springs, bump foils, mesh foils, and the like.

[0060] (Action and effect) In the third embodiment, the same functions and effects can be achieved with respect to the configuration similar to that of the first and second embodiments described above. In this embodiment, the centering mechanism 360 further includes a second spring member 361 that biases the sliding portion 270 relative to the supported body 20 in a direction intersecting with the axis O direction.

[0061] This can reduce the impact when the supported body 20 vibrates and comes into contact with the sliding part 270 of the centering mechanism. In addition, the second spring member 361 can pre-compress the sliding part 270 and press the sliding part 270 against the supported body 20. This allows the supported body 20 and the sliding part 270 to be in constant contact with each other, and friction can be constantly applied to the supported body 20. Therefore, the vibration of the supported body 20 can be quickly attenuated. In addition, even if the sliding part 270 wears and reduces in thickness, the centering mechanism 360 can urge the sliding part 270 against the supported body 20 with the same force as before the wear by the second spring member 361.

[0062] 9 and 10, the centering mechanism 360A may have a brush 271A facing the supported body 20 side instead of the sliding member 271 as the sliding portion 270A.

[0063] <Fourth embodiment> Hereinafter, a shock absorber 400 according to a fourth embodiment of the present disclosure will be described with reference to Fig. 11 and Fig. 12. Configurations similar to those in the above-described embodiments will be given similar names and reference numerals, and descriptions thereof will be omitted as appropriate.

[0064] In this embodiment as well, the centering mechanisms 460 are provided on both vertical sides of the supported body 20 and on both horizontal sides (both left and right sides of the supported body 20) perpendicular to the direction of the axis O. In this embodiment, the centering mechanism 460 has a support part 461, a rotating shaft 462, and wheels 463 in addition to a casing 261, a first block 262, a second block 263, a first bolt 264, and a second bolt 265.

[0065] The support portion 461 is provided on the inner surface of the second block 263 facing the supported object 20. A pair of the support portions 461 are provided spaced apart in the circumferential direction about the central axis O1. The support portion 461 extends toward the supported object 20. The support portion 461 is formed in a triangular shape that tapers toward the supported object 20 when viewed in the circumferential direction about the central axis O1.

[0066] The rotating shaft 462 is provided between the pair of supporting portions 461. The rotating shaft 462 connects the tops of the pair of supporting portions 461 on the supported body 20 side.

[0067] The wheel 463 is provided between the pair of support parts 461. The wheel 463 is inserted through the rotation shaft 462. The wheel 463 is provided rotatable around the rotation shaft 462. This allows the wheel 463 to come into contact with the outer circumferential surface of the supported body 20 and roll in the direction of the axis O.

[0068] (Action and effect) In the fourth embodiment, the same functions and effects can be achieved with respect to the configurations similar to those of the first to third embodiments described above. In this embodiment, the centering mechanism 460 has wheels 463 that are in contact with the supported body 20 and can roll in the axis O direction.

[0069] As a result, the frequency of replacing the wheels 463 can be significantly reduced because the wheels 463 are less worn than the sliding material 271. This improves maintainability. In addition, if the moving speed of the supported body 20 is fast when an impact load is applied, the impact load applied to the centering mechanism 460 can be effectively deflected.

[0070] (Other embodiments) Although the embodiments of the present disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like that do not depart from the gist of the present disclosure are also included. In the above embodiment, the shock absorbers 100, 200, 300, 300A, and 400 are used in furnaces 1 for coal, oil, waste, and the like, but the present invention is not limited to this. For example, the shock absorbers 100, 200, 300, 300A, and 400 may be used in boilers, gasifiers, reactors, heat exchangers, transmissions, and the like.

[0071] In the above embodiment, the guide bar 10 is indirectly connected to the base 3 via the mounting wall 4, but this is not limited to the above. The mounting wall 4 does not have to be provided, and the guide bar 10 may be directly connected to the base 3.

[0072] In the above embodiment, the guide bar 10 of the present embodiment is formed in a shaft shape extending in the direction of the axis O, but is not limited to this. The shape of the guide bar 10 can be changed as appropriate. The guide bar 10 may be formed in, for example, a rectangular column shape extending in the direction of the axis O.

[0073] In the above embodiment, the supported body 20 is formed in a cylindrical shape extending in the direction of the axis O, but is not limited to this. The shape of the supported body 20 can be changed as appropriate. The supported body 20 may be formed in, for example, a prismatic shape or a block shape extending in the direction of the axis O.

[0074] In the above embodiment, the shock absorbers 100, 200, 300, 300A, and 400 are described as including the retaining member 5. However, the shock absorbers 100, 200, 300, 300A, and 400 do not necessarily have to include the retaining member 5.

[0075] In the above embodiment, the bushing 41 is a spherical bushing, but the present invention is not limited to this. For example, the bushing 41 may be another type of bushing, such as a rubber bushing, that is capable of automatically aligning (adjusting) the relative angle θ with respect to the axis O.

[0076] In the present embodiment, four pairs of guide bars 10 and sliders 40 are arranged on the same circle C1 when viewed from the axis O direction, but this is not limited to this. The number and arrangement of the guide bars 10 and sliders 40 can be changed as appropriate.

[0077] In this embodiment, the four centering mechanisms 60, 260, 360, 360A, 460 are arranged on the same circle C2 when viewed from the axis O direction, but this is not limited to this. The number and arrangement of the centering mechanisms 60, 260, 360, 360A, 460 can be changed as appropriate.

[0078] <Additional Notes> The shock absorbers 100, 200, 300, 300A, and 400 described in the respective embodiments can be understood, for example, as follows.

[0079] (1) A shock absorber 100, 200, 300, 300A, 400 according to a first embodiment comprises a base 3, a guide bar 10 connected to the base 3 and extending in the direction of an axis O, a supported body 20 arranged along the guide bar 10 and movable in the direction of the axis O relative to the base 3, a slider 40 fixed to the supported body 20 and slidable in the direction of the axis O relative to the guide bar 10, and a spring member 7 that biases the slider 40 against the movement of the slider 40, and the slider 40 has a bush 41 that is automatically centered with respect to the guide bar 10 at a relative angle θ with respect to the axis O. An example of the base 3 is the wall of the furnace 1 of the above-mentioned embodiment. An example of the supported body 20 is a combustion tube that generates the pressure wave in the above-described embodiment. An example of the spring member 7 is the coil spring of the above-mentioned embodiment. Examples of the bushing 41 include the spherical bushing of the above-mentioned embodiment and a rubber bushing.

[0080] Since the slider 40 moves in the direction of the axis O along the guide bar 10, it is possible to prevent the supported object 20 from shifting in a direction intersecting the direction of the axis O. Furthermore, the slider 40 can automatically align the relative angle θ with respect to the axis O with respect to the guide bar 10 by the bush 41. As a result, even if the axis O of the guide bar 10 and the central axis O1 of the slider 40 are not completely parallel, the sliding of the slider 40 is not hindered.

[0081] (2) The second aspect of the shock absorber 100, 200, 300, 300A, 400 may be the shock absorber 100, 200, 300, 300A, 400 of the first aspect, wherein the bush 41 includes an inner member 43 that covers the guide bar 10 from the outer periphery side and is attached so as to be slidable in the direction of the axis O relative to the outer periphery of the guide bar 10 and has a spherical surface 43b formed on the outer periphery side, and an outer member 44 that covers the inner member 43 from the outer periphery side and is attached so as to be slidable along the spherical surface 43b relative to the inner member 43 and is fixed to the supported body 20.

[0082] The inner member 43 is attached to the guide bar 10 so as to be slidable in the direction of the axis O. Therefore, the slider 40 is permitted to move in the direction of the axis O along the guide bar. Furthermore, the outer member 44 is permitted to move relative to the inner member 43 along the spherical surface 43b. This allows the inclination of the bush 41 with respect to the axis O to be automatically adjusted.

[0083] (3) The shock absorbers 100, 200, 300, 300A, and 400 of a third aspect are the shock absorbers 100, 200, 300, 300A, and 400 of the first or second aspect, and the supported body 20 may be formed in a cylindrical shape extending in the axis O direction.

[0084] This makes it easier to arrange the sliders 40 evenly around the supported object 20. Furthermore, since the supported object 20 is hollow, the shock absorbers 100, 200, 300, 300A, 400 can be made lighter in weight.

[0085] (4) The fourth aspect of the shock absorber 100, 200, 300, 300A, 400 may be any one of the shock absorbers 100, 200, 300, 300A, 400 of the first to third aspects, and may further include a centering mechanism 60, 260, 360, 360A, 460 that is fixed to the base 3 and arranged outside the supported object 20, can contact the supported object 20 from a direction intersecting the direction of the axis O, and can slide in the direction of the axis O relative to the supported object 20.

[0086] This makes it possible to adjust the posture of supported body 20 so that it aligns with the guide bar by centering mechanisms 60, 260, 360, 360A, 460. Furthermore, it is possible to prevent the posture of supported body 20 from swinging in a direction intersecting with the axis O direction.

[0087] (5) The fifth aspect of the shock absorber 200, 300, 300A is the shock absorber 200, 300, 300A of the fourth aspect, and the centering mechanism 260, 360, 360A may have a sliding part 270, 270A arranged opposite the supported object 20, which is slidable relative to the supported object 20 and which is deformable more flexibly than the supported object 20.

[0088] This makes it possible to impart slidability to the centering mechanisms 260, 360, 360A relative to the supported body 20 with a simple configuration. Examples of the sliding parts 270 and 270A include the sliding member 271 and the brush 271A of the above-described embodiment.

[0089] (6) The sixth aspect of the shock absorber 300, 300A is the shock absorber 300, 300A of the fifth aspect, and the centering mechanism 360, 360A may further have a second spring member 361 that urges the sliding portion 270, 270A in a direction intersecting the axis O direction relative to the supported body 20. Examples of the second spring member 361 include elastic materials such as rubber and urethane, disc springs, bump foils, mesh foils, and the like.

[0090] This makes it possible to reduce the impact when the supported body 20 vibrates and comes into contact with the sliding parts 270, 270A of the centering support. In addition, the second spring member 361 can pre-compress the sliding parts 270, 270A and press the sliding parts 270, 270A against the supported body 20. This allows the supported body 20 and the sliding parts 270, 270A to be constantly in contact with each other, and friction to be constantly applied to the supported body 20. Therefore, the vibration of the supported body 20 can be quickly attenuated.

[0091] (7) The shock absorber 400 of a seventh aspect is the shock absorber 400 of the fourth aspect, and the centering mechanism 460 may have a wheel 463 that is in contact with the supported body 20 and can roll in the direction of the axis O.

[0092] As a result, the wheels 463 are less susceptible to wear compared to the sliding material 271, and it is possible to significantly reduce the frequency of replacing the wheels 463. Furthermore, if the moving speed of the supported body 20 is fast when an impact load is applied, the impact load applied to the centering mechanism 460 can be effectively deflected. [Explanation of symbols]

[0093] 1...furnace 2...container 3...base 3a...opening 4...mounting wall 4a...opening 5...retaining member 6...flange 6a...fitting groove 7...spring member 10...guide bar 11...guide bar body 12...locking member 13...fixed end 20...supported member 21...tubular portion 22...outer ring 30...support mechanism 31...fixing device 32...wire 40...slider 41...bush 42...outer cylindrical portion 42a...inner peripheral groove 42b...outer peripheral groove 42c...end face groove 43...inner member 43a...inner surface 43b...spherical surface 44...outer member 44a...inner surface 44b...outer surface 45...main body 45a...first member 45b...second member 45c...third member 46...mounting piece 46a...ring portion 46b...flange portion 60...Centering mechanism 100...Buffer device C1...Circle C2...Circle L...Load path O...Axis O1...Central axis O2...Central axis 200: Shock absorber 260: Centering mechanism 261: Casing 261a: Storage recess 262: First block 262a: Inner surface 263: Second block 263a: Main body 263b: Projection 263c: Outer surface 264: First bolt 265: Second bolt 270: Sliding portion 271: Sliding material t: Thickness 300: Shock absorber; 360: Centering mechanism; 361: Second spring member 300A... Shock absorber 360A... Centering mechanism 270A... Sliding part 271A... Brush 400: Shock absorber; 460: Centering mechanism; 461: Support; 462: Rotating shaft; 463: Wheel

Claims

1. A base and a guide bar connected to the base and extending in an axial direction; A supported member disposed along the guide bar and movable relative to the base in the axial direction; a slider fixed to the supported body and slidable in the axial direction relative to the guide bar; a spring member for biasing the slider against movement; Equipped with The slider has a bushing that can automatically adjust the relative angle with respect to the axis of the guide bar.

2. The bushing is an inner member that covers the guide bar from an outer periphery side and is attached to be slidable in the axial direction relative to an outer periphery surface of the guide bar, the inner member having a spherical surface formed on the outer periphery side; an outer member that covers the inner member from an outer circumferential side, is attached to the inner member so as to be slidable along the spherical surface, and is fixed to the supported body; 2. The shock absorber of claim 1, further comprising:

3. The shock absorber according to claim 1 or 2, wherein the supported body is formed in a cylindrical shape extending in the axial direction.

4. The shock absorber device of claim 1 or 2, further comprising a centering mechanism fixed to the base and arranged outside the supported object, capable of contacting the supported object from a direction intersecting the axial direction and capable of sliding in the axial direction relative to the supported object.

5. The shock absorber according to claim 4 , wherein the centering mechanism has a sliding portion disposed opposite the supported object, capable of sliding relatively with respect to the supported object and capable of deforming more flexibly than the supported object.

6. The shock absorber according to claim 5 , wherein the centering mechanism further includes a second spring member that biases the sliding portion in a direction intersecting the axial direction relative to the supported object.

7. The shock absorber according to claim 4 , wherein the centering mechanism has wheels that are in contact with the supported object and can roll in the axial direction.

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