JP5052264B2 - Damping damper and its installation method - Google Patents

Description

  The present invention relates to a vibration damper used mainly for structures such as buildings and bridges, and a method for installing the damper.

Conventionally, a vibration damping damper, for example, a vibration damping oil damper using oil, encloses oil in a first cylinder chamber and a second cylinder chamber in a cylinder defined by a piston, and the first cylinder chamber and the second cylinder. A throttle, such as a damping valve or orifice, is provided in the middle of the oil flow path communicating with the chamber. When external force is input through the piston rod, the throttle resistance generated when oil escapes from one cylinder chamber to the other cylinder chamber. The reaction force is obtained and the vibration is attenuated. In addition, a self-aligning bearing such as a spherical bearing is used at the connection between the damping oil damper and the structure that is the installation target so that the damping oil damper can be easily installed on the installation target. Furthermore, the vibration damping force generated by the vibration damping oil damper can be efficiently transmitted to the installation target (see, for example, Patent Document 1).
Japanese Patent No. 3306399

  By the way, since the damping oil damper is installed on the structure to be installed for a long period of time, rust prevention treatment is applied by painting, and the outer wall of the structure is rust generated from the damping oil damper. This prevents the inconvenience of getting dirty. However, the self-aligning bearings, particularly the sliding surfaces on which the inner ring and the outer ring slide with each other, of the connecting portion between the vibration damping oil damper and the structure cannot be coated to maintain lubricity. . Therefore, it is conceivable to grease the self-aligning bearing to maintain lubricity and to prevent rusting. However, the grease may contaminate the outer wall of the structure, which is not preferable.

  The present invention has been made in view of the above circumstances, and the purpose of the present invention is the inconvenience that a self-aligning bearing mounted on a connection portion with an object to be installed rusts, and thus rust generated from the self-aligning bearing. Therefore, an object of the present invention is to provide a vibration damper and an installation method thereof that can prevent an inconvenience that an installation object becomes dirty.

The present invention has been proposed in order to achieve the above object. According to the present invention, a long damper body that expands and contracts along the longitudinal direction, an end of the damper body, and an installation target are provided. A damper for vibration control comprising a bracket unit for connecting an object in a rotatable state,
The bracket unit includes a first bracket mounted with a self-aligning bearing that allows the inclination of the shaft by a spherical seat, and two shaft support portions spaced apart in a bifurcated manner, and the first bracket between the two shaft support portions. A second bracket into which the bracket can be inserted, and a connecting shaft connected to both shaft support portions while being pivotally supported by the self-aligning bearing;
Either one of the first bracket or the second bracket is fastened to the end of the damper body, and the other is fastened to the object to be installed;
An annular seal ring is provided in a state where the connecting shaft is inserted inward at a position located on the outer ring side of the self-aligning bearing between the first bracket and each shaft support portion,
On one shaft support part, a connection hole that can be connected to the end of the connection shaft is opened.
In the other shaft support portion, a passage forming hole having a diameter larger than that of the connection hole is opened,
An annular seal retainer is accommodated in the passage forming hole, the outer diameter of the seal retainer is set to a dimension that fits in the passage forming hole, and the inner diameter is set to a dimension that fits the end of the connecting shaft. ,
A damper for damping vibration, wherein the end of the seal retainer is brought into contact with the seal ring, and a shaft cover member attached to the end face of the connecting shaft is brought into contact with the side of the seal retainer so that both seal rings can be compressed. It is.

According to a second aspect of the present invention, the shaft cover member includes a cover main body that covers the end surface of the connecting shaft, and protrudes from the outside of the cover main body toward the seal pressing side. A pressing protrusion that can be pressed to
2. The vibration damper according to claim 1, wherein the pressing protrusion presses the seal pressing member in a state where a gap is formed between the cover body and the end surface of the connecting shaft. .

  According to a third aspect of the present invention, there is provided the vibration damping damper according to the first or second aspect, wherein a seal presser is slidable on the outer peripheral surface of the connection shaft.

According to a fourth aspect of the present invention, there is provided the vibration damping damper installation method according to any one of the first to third aspects,
Inserting between the two bracket support portions of the second bracket, the first bracket and one seal ring superposed on the opposite side of the passage forming hole across the self-aligning bearing of the first bracket, An alignment step of aligning the first bracket and the second bracket by inserting an alignment pin into the connection hole, the passage forming hole, the one seal ring, and the self-aligning bearing in this state;
A seal pressing preparation step for placing the seal pressing member in the passage forming hole while arranging the other hole through the seal forming hole between the first bracket and the shaft support portion;
A shaft insertion jig having a tapered shape is connected to the end face of the connection shaft, the tip of the shaft insertion jig is brought into contact with the end of the alignment pin on the passage forming hole side, and the connection shaft is pushed in in this state for connection. A connecting shaft insertion step of inserting the hole, the passage forming hole, both seal rings and the self-aligning bearing, and removing the alignment pin;
Remove the shaft insertion jig from the connecting shaft, engage the connecting shaft and each shaft support, and push the seal retainer toward the self-aligning bearing side to compress both seal rings along the axial direction of the connecting shaft Sealing compression process to
It is the installation method of the damper for vibration suppression characterized by installing in an installation target object through.

According to the present invention, the following excellent effects can be obtained.
According to the first aspect of the present invention, it is provided with a long damper main body that expands and contracts along the longitudinal direction, and a bracket unit that connects the end of the damper main body and the installation object in a rotatable state. The damper unit for vibration control includes a first bracket equipped with a self-aligning bearing that allows the inclination of the shaft by a spherical seat, and two shaft support portions separated in a bifurcated manner. The first bracket or the second bracket includes a second bracket in which the first bracket can be inserted between the shaft support portions, and a connection shaft connected to the both shaft support portions while being pivotally supported by the self-aligning bearing. One of the above is fixed to the end of the damper main body, the other is fixed to the installation object, and the position located on the outer ring side of the self-aligning bearing between the first bracket and each shaft support portion A ring seal ring Provided in a state where the shaft is inserted inward, one shaft support portion is provided with a connection hole to which the end of the connection shaft can be connected, and the other shaft support portion has a diameter larger than that of the connection hole. The passage forming hole is opened, an annular seal retainer is accommodated in the passage forming hole, the outer diameter of the seal retainer is set to a dimension that fits in the passage forming hole, and the inner diameter is the end of the connecting shaft. The end of the seal presser is in contact with the seal ring, and the shaft cover member attached to the end surface of the connecting shaft is in contact with the side of the seal presser so that both seal rings can be compressed. The gap between the first bracket and the second bracket connected via the self-aligning bearing can be reliably sealed, and the self-aligning bearing is exposed to atmospheric moisture, rainwater, etc., and rusts. Due to rust generated from self-aligning bearings It is possible to prevent a disadvantage that the setting target object will dirty. Further, even if the seal ring is disposed between the first bracket and the two shaft support portions, the seal ring can be compressed without any trouble by the seal presser. Therefore, even if the first bracket is inclined with respect to the shaft support portion due to the operation of the self-aligning bearing and the interval between the first bracket and the shaft support portion is widened, the compressed seal ring is restored and the first bracket or The seal state of the self-aligning bearing can be maintained without leaving the shaft support portion.

  According to the second aspect of the present invention, the shaft cover member includes a cover main body that covers the end surface of the connecting shaft, and protrudes from the outside of the cover main body toward the seal pressing side. Since the pressing protrusion is configured to press the seal press in a state where a clearance is formed between the cover body and the end surface of the connecting shaft, the sealing ring in a compressed state is provided. However, even if it is deformed over time, the seal cover can be further compressed by moving the shaft cover member. Accordingly, the sealing state of the self-aligning bearing can be easily restored without performing the replacement operation of the seal ring.

  According to the third aspect of the present invention, the seal retainer can be slid on the outer peripheral surface of the connection shaft, so that the connection shaft can also function as a movement guide for the seal retainer, and the seal ring can be compressed smoothly. can do.

  According to the fourth aspect of the present invention, the first bracket and the self-aligning bearing of the first bracket are sandwiched between the shaft support portions of the second bracket, and are superposed on the side opposite to the passage forming hole. In this state, the alignment pin is inserted into the connection hole, the passage formation hole, the one seal ring, and the self-aligning bearing to align the first bracket and the second bracket. An alignment step to be performed; a seal press preparation step for placing the seal presser in the passage formation hole while arranging the passage formation hole between the first bracket and the passage formation shaft support portion through another seal ring; A shaft insertion jig having a tapered shape is connected to the end face of the shaft, the tip of the shaft insertion jig is brought into contact with the end of the alignment pin on the side of the passage formation hole, and in this state, the connection shaft is pushed into the connection hole and the passage. Formation hole and both sea Insert the connecting shaft through the ring and the self-aligning bearing, remove the alignment pin, remove the shaft insertion jig from the connecting shaft, engage the connecting shaft with each shaft support, and automatically seal the seal Braking with self-aligning bearings because the damping damper is installed on the installation object through a seal compression process that compresses both seal rings along the axial direction of the connecting shaft by pushing toward the aligning bearing side The damping damper can be easily installed on the installation object via the unit.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings, taking a damping oil damper as a typical damping damper as an example. FIG. 1 is a schematic view of a damping damper according to the present invention, and FIG. 2 is a cross-sectional view of a main part of a bracket unit for attaching the damping damper to an installation object.

  As shown in FIG. 1, the vibration damping oil damper 1 includes a long damper body 2 that expands and contracts along the longitudinal direction, and two bracket units 3 provided at both ends of the damper body 2. It is configured. The damper main body 2 is generally composed of a cylinder tube 5 and a rod (not shown) that moves forward and backward in the cylinder tube 5 by fixing a piston in the middle. Then, one bracket unit 3 is connected to the end of the cylinder tube 5 opposite to the rod, and the other end is connected to the end of the rod protruding from the cylinder tube 5 (specifically, the end of the rod cover 6 covering the rod). The bracket unit 3 is connected. The piston tube divides the inside of the cylinder tube 5 into a first cylinder chamber and a second cylinder chamber (both not shown), and oil is sealed in each cylinder chamber, and the first cylinder chamber, the second cylinder chamber, A restrictor such as a relief valve or an orifice is provided in the middle of the oil flow path communicating with (not shown). When an external force (external force for expanding / contracting the damper main body 2) is applied along the longitudinal direction of the damper main body 2 due to vibration generated in a building such as a building, oil is transferred from one cylinder chamber to the other cylinder chamber. The diaphragm resists when it escapes, thereby obtaining a reaction force against the external force to attenuate the vibration.

  The bracket unit 3 is a unit for connecting the damper main body 2 to the installation object 9 (for example, a building such as a building or a bridge) in a rotatable state. As shown in FIGS. 2 and 3, the bracket unit 3 is installed. A first bracket 11 fixed to the object 9, a second bracket 12 fixed to the end of the damper main body 2, and a connection shaft 13 for axially mounting the first bracket 11 and the second bracket 12. It is prepared for. The first bracket 11 is a so-called single clevis-shaped bracket, and includes a first cylindrical base bracket portion 15 erected on the surface of the installation object 9 and a short cylindrical bearing holding portion 16. A spherical bearing 18 (corresponding to a self-aligning bearing in the present invention) that allows the inclination of the shaft by a spherical seat is mounted in the holding portion 16, and the bearing hole 18 a of the spherical bearing 18 passes through the first bracket base 15. In addition, the connecting shaft 13 fitted in the bearing hole 18a can be set to extend along a direction orthogonal to the longitudinal direction of the damper main body 2. Further, C-type retaining rings 21 fitted to the inner peripheral surface of the bearing holding portion 16 are engaged with both side surfaces of the outer ring of the spherical bearing 18, thereby preventing the inconvenience that the spherical bearing 18 falls off the bearing holding portion 16. is doing.

  The second bracket 12 is a so-called double clevis-shaped bracket. As shown in FIG. 3, the second bracket 12 includes a disk-shaped second bracket base 23 that is fixed to the end of the damper main body 2. The block-shaped shaft support portions 24 (the passage non-forming shaft support portion 24a and the passage forming shaft support portion 24b) are connected to the damper main body 2 from both sides of the bracket base 23 opposite to the surface facing the damper main body 2. It projects in a bifurcated shape toward the opposite side. The distance between the two shaft support portions 24 is wider than the thickness of the first bracket 11 (thickness in the direction along the center line of the bearing hole 18a). Specifically, the first bracket 11 is centered on the spherical bearing 18. Thus, the interval is set so as to be swingable (see FIG. 4A). The passage non-forming shaft support portion 24a is opened through a connection hole 26 to which the end of the connection shaft 13 can be connected, and the passage forming shaft support portion 24b has a passage whose diameter is larger than that of the connection hole 26. It opens through the formation hole 27. The passage forming hole 27 is formed with a diameter slightly larger than an outer diameter of a seal ring 28 described later, and forms a passage that can pass through the seal ring 28.

  The connection shaft 13 is a member that is connected to both shaft support portions 24 while being supported by the spherical bearing 18. When connected to the connection hole 26, the connection shaft 13 intersects the longitudinal direction of the damper body 2 (specifically, Can extend along a direction perpendicular to the longitudinal direction of the damper body 2. Further, the fit between the connection shaft 13 and the bearing hole 18a is set to a clearance fit that allows the spherical bearing 18 to slide along the extending direction of the connection shaft 13 without rattling.

  And the bracket unit 3 seals the clearance gap produced between the 1st bracket 11 and the 2nd bracket 12, and provides the sliding surface of the spherical bearing 18 (spherical sliding surface on which an inner ring and an outer ring slide mutually). It has a structure to prevent rust. More specifically, a portion located between the first bracket 11 and each shaft support portion 24 on the outer ring side of the spherical bearing 18 (in other words, closer to the inner peripheral surface of the bearing holding portion 16) has nitrile rubber or An annular seal ring 28 (a passage non-forming side ring 28 a and a passage forming side ring 28 b) made of an elastic body such as fluororubber is provided, and the connecting shaft 13 is inserted inside the seal ring 28. Specifically, the passage non-forming side ring 28a is disposed between the first bracket 11 and the passage non-forming shaft support portion 24a, and the passage forming side ring is provided between the first bracket 11 and the passage forming shaft support portion 24b. 28b is arranged. The outer diameter of the seal ring 28 is set in accordance with the inner diameter of the bearing holding portion 16. When the seal ring 28 is fitted into the bearing holding portion 16, the outer peripheral surface of the seal ring 28 and the inner circumference of the bearing holding portion 16 are set. The surface is in close contact with the liquid-tight state. The normal thickness of the seal ring 28 (thickness when not attached to the bracket unit 3) is a dimension t that is sufficiently thicker than the gap between the first bracket 11 and the shaft support portion 24. It is sufficiently larger than the maximum separation distance L between the shaft support portion 24 and the C-shaped retaining ring 21 when the first bracket 11 swings (swings) at the maximum swing angle θ along the extending direction of the connection shaft 13. The thick dimension t is set (see FIGS. 4A and 4B).

  Furthermore, the bracket unit 3 has a configuration for compressing the seal ring 28 along the extending direction of the connecting shaft 13. More specifically, an annular seal retainer 31 is accommodated in the passage forming hole 27, and the outer diameter of the seal retainer 31 is set to a dimension that fits in the passage forming hole 27 in a slidable state. The inner diameter of the seal retainer 31 is set to a dimension that allows the end of the connecting shaft 13 to be slidable, and the end of the seal retainer 31 on the spherical bearing 18 side is in contact with the passage forming side ring 28b. . Further, a disc-shaped lid member 33 that is sufficiently larger than the connection hole 26 is attached to the end surface (left end surface in FIG. 2) of the connection shaft 13 on the non-passage shaft support portion 24a side. Bolts 34 are fastened in a detachable state. Then, the outer peripheral portion of the lid member 33 is engaged with the outside of the passage non-forming shaft support portion 24a (that is, the side opposite to the first bracket 11 across the passage non-forming shaft support portion 24a), and the connecting shaft 13 is connected to the passage 13 The movement to the forming shaft support portion 24b side is prevented. Further, the end surface (right end surface in FIG. 2) on the passage forming shaft support portion 24b side of the connecting shaft 13 is a passage side end surface 13a, and the passage side end surface 13a has a disk sufficiently larger than the passage forming hole 27. The shaft cover member 35 is engaged in a movable state along the extending direction of the connecting shaft 13.

  The shaft cover member 35 includes a cover main body 37 that covers the passage-side end surface 13a of the connecting shaft 13, and an annular pressing protrusion 38 that protrudes from the outside of the cover main body 37 toward the seal presser 31 side. The pressing protrusion 38 is in contact with the side surface of the seal presser 31. Then, a fastening member (fastening bolt) 39 is inserted into the insertion hole 37a that penetrates the central portion of the cover main body 37, the tip of the fastening member 39 is screwed into the passage-side end surface 13a, and the fastening member 39 is inserted. The shaft cover member 35 is moved along the extending direction of the connection shaft 13 by tightening the, and the seal presser 31 is pressed toward the spherical bearing 18 by the pressing protrusion 38. As a result, the end surface (left end surface in FIG. 2) of the seal retainer 31 on the first bracket 11 side is positioned on substantially the same plane as the inner side surface (side surface facing the first bracket 11) of the passage forming shaft support portion 24b. The passage forming side ring 28b is sandwiched between the outer ring (specifically, the C-shaped retaining ring 21) of the spherical bearing 18 and the seal retainer 31, and is compressed along the extending direction of the connecting shaft 13. Further, the spherical bearing 18 (first bracket 11) moves on the connection shaft 13 to the non-passage shaft support portion 24a side, and the non-passage side ring 28a is an outer ring of the spherical bearing 18 (specifically, a C-shaped retaining ring 21). ) And the non-passage-forming shaft support portion 24a and compressed along the extending direction of the connecting shaft 13. As a result, the passage non-forming side ring 28a and the passage non-forming shaft support portion 24a are in close contact with each other in a liquid-tight state, and the passage forming side ring 28b and the passage forming shaft support portion 24b are in close contact with each other in a liquid-tight state.

  Further, between the lid member 33 and the fastening member 34, there is provided a washer 40 with a seal that is covered with a sealing material, and the connection hole 26 of the passage non-forming shaft support portion 24 a and the lid member 33 side of the connection shaft 13. An O-ring 41 is mounted between the two ends. Further, a seal washer 42 covered with a sealing material is provided between the shaft cover member 35 and the fastening member 39, and the inner peripheral surface of the passage forming hole 27 and the end of the seal retainer 31 on the shaft cover member 35 side are provided. An O-ring 43 is mounted between the two parts.

  In this way, the bracket unit 3 sufficiently seals the gap between the first bracket 11 and the second bracket 12 connected via the spherical bearing 18, in other words, the spherical bearing 18 inside the bracket unit 3. And the sliding surface of the spherical bearing 18 is exposed to moisture in the atmosphere, rainwater, etc., and rusts. In addition, the installation object 9 is contaminated by the rust generated from the spherical bearing 18. Can be prevented. Even if the seal ring 28 is disposed between the first bracket 11 and the two shaft support portions 24, the seal ring 28 can be compressed without any trouble by the seal presser 31. Therefore, even when the first bracket 11 is inclined with respect to the shaft support portion 24 due to the operation of the spherical bearing 18 and the distance between the first bracket 11 and the shaft support portion 24 is widened, the compressed seal ring 28 is restored. The sealed state (sealed state) of the spherical bearing 18 can be maintained without leaving the first bracket 11 and the shaft support portion 24.

  Further, in a state where the seal ring 28 is compressed and the spherical bearing 18 is sealed in the bracket unit 3, as shown in FIG. 2, a gap is formed between the cover body 37 and the passage-side end surface 13a. Thus, the pressing projection 38 presses the seal presser 31. Therefore, even if the seal ring 28 in the compressed state is deformed over time, if the fastening member 39 is tightened and the shaft cover member 35 is moved, the seal retainer 31 is pressed by the pressing protrusion 38 to further compress the seal ring 28. can do. As a result, the sealing state of the spherical bearing 18 can be easily restored without performing the replacement work of the seal ring 28.

  Since the connecting shaft 13 is inserted inside the seal retainer 31 and the seal retainer 31 is slidable on the outer peripheral surface of the connecting shaft 13, the connecting shaft 13 can also function as a movement guide for the seal retainer 31. The seal ring 28 can be compressed smoothly.

  Next, a method for installing the above-described vibration damping oil damper 1 on the installation object 9 will be described. The first bracket 11 is fixed to the installation object 9 in advance, and the second bracket 12 is fixed to the damper main body 2 in advance, and the spherical bearing 18 is held on the bearing holding portion 16 of the first bracket 11. Keep it. In addition, an alignment pin 46 and a shaft insertion jig 47 used for installing the damping oil damper 1 are prepared. As shown in FIG. 5B, the alignment pin 46 includes a pin body 49 that is extremely slightly thinner than the connection shaft 13, and the length of the pin body 49 is set longer than that of the connection shaft 13. . Further, a tapered pin side taper portion 50 is formed at the tip of the pin body 49 so that the alignment pin 46 can be easily inserted into the connection hole 26 or the bearing hole 18a, and the formation length of the pin side taper portion 50 (pin The length (PT) along the extending direction of the main body 49) PT is set to a dimension shorter than the length of the bearing hole 18a, specifically, about half the length of the bearing hole 18a. Further, a flange portion 51 having a diameter larger than that of the connection hole 26 is provided at the proximal end of the pin main body 49.

  As shown in FIG. 5D, the shaft insertion jig 47 is a short cylindrical member formed with the same diameter as the connection shaft 13, and a connection portion 53 such as an implantation bolt is provided from one end of the shaft insertion jig 47. The connecting portion 53 is connected to the end of the connecting shaft 13 on the lid member 33 side so that the shaft inserting jig 47 and the connecting shaft 13 can be connected. Further, a tapered jig side taper portion 54 is formed at the other end of the shaft insertion jig 47 so that the shaft insertion jig 47 (specifically, the connection shaft 13 to which the shaft insertion jig 47 is connected) is connected to the connection hole 26 or the like. It is easy to insert into the bearing hole 18a. In addition, the formation length (length along the extending direction of the connecting shaft 13) JT of the jig side taper portion 54 is a dimension shorter than the length of the bearing hole 18a, and the formation length of the pin side taper portion 50. The sum with PT (see FIG. 5E) is set to be shorter than the length of the bearing hole 18a.

  In order to install the vibration damping oil damper 1 on the installation object 9, first, as shown in FIGS. 5 (a) and 5 (b), one end of the bearing holding portion 16 of the first bracket 11 is placed at one end. The end portion of the seal ring 28 (passage non-formation side ring 28a) is fitted to overlap the first bracket 11 and the non-passage formation side ring 28a, and the non-passage formation side ring 28a is attached to the non-passage formation shaft support portion 24a. The first bracket 11 is inserted between the shaft support portions 24 of the second bracket 12 in an opposing posture. When the first bracket 11 is inserted, the alignment pin 46 is moved closer from the passage non-forming shaft support portion 24a side, the connection hole 26, the inside of the non-passage forming side ring 28a, the bearing hole 18a of the spherical bearing 18, and the passage formation. The first bracket 11 and the second bracket 12 are aligned sequentially by being inserted through the holes 27, and the inclination of the inner ring of the spherical bearing 18 is restricted (alignment process). At this time, the alignment pin 46 is sufficiently inserted, the flange portion 51 comes into contact with the passage non-forming shaft support portion 24a, and the pin side taper portion 50 is protruded from the passage forming hole 27 of the passage forming shaft support portion 24b.

  If the first bracket 11 and the second bracket 12 are aligned using the alignment pin 46, the passage forming side ring 28b is attached to the protruding pin side taper portion 50 as shown in FIG. In this state, the inside of the passage forming hole 27 is moved and disposed between the first bracket 11 and the passage forming shaft support portion 24b. Further, the seal presser 31 is fitted into the protruding pin-side taper portion 50, and in this state, the seal presser 31 is pushed into the passage forming hole 27 and accommodated (seal presser preparation step). Then, the seal presser 31 is brought into contact with the passage forming side ring 28 b and pushed toward the first bracket 11, and the end portion of the passage forming side ring 28 b is fitted to the end portion of the bearing holding portion 16. Further, an O-ring 43 is mounted between the inner peripheral surface of the passage forming hole 27 and the end of the seal presser 31.

  If the passage forming side ring 28b is pushed to the first bracket 11 side by the seal presser 31, the shaft cover member 35 is attached to the passage side end surface 13a of the connecting shaft 13 by the seal washer 42 as shown in FIG. Fastened by the fitted fastening member 39, a shaft insertion jig 47 is connected to the end opposite to the passage-side end face 13a. At this time, the tightening degree of the fastening member (fastening bolt) 39 is adjusted to such an extent that the cover main body 37 does not come into surface contact with the passage-side end face 13a. Then, as shown in FIG. 5E, the tip of the shaft insertion jig 47 is brought into contact with the end of the alignment pin 46 on the passage forming hole 27 side, specifically, the end surface of the pin-side tapered portion 50, The center line of the alignment pin 46 and the center line of the connecting shaft 13 are set to be on the same straight line. In this state, the connecting shaft 13 (more specifically, a unit in which the shaft cover member 35 and the shaft insertion jig 47 are assembled to the connecting shaft 13) is pushed in, and the connecting shaft 13 is connected to the first bracket 11 and the second bracket 12, more specifically connected. The hole 26, the passage forming hole 27, both the seal ring 28, and the bearing hole 18a of the spherical bearing 18 are inserted, and the alignment pin 46 is retracted and removed from the first bracket 11 and the second bracket 12 (connection shaft insertion step). ). Then, the pressing protrusion 38 of the shaft cover member 35 abuts on the seal presser 31 and restricts the connection shaft 13 from falling off toward the passage non-forming shaft support portion 24a. Further, the shaft insertion jig 47 protrudes outward from the passage non-forming shaft support portion 24a.

  At this time, the sum of the formation length PT of the pin side taper portion 50 and the formation length JT of the jig side taper portion 54 is set to be shorter than the length of the bearing hole 18a. During the insertion process, a member thinner than the connection shaft 13 and the pin body 49 is not inserted over the entire interior of the bearing hole 18a. Therefore, there is no inconvenience that the first bracket 11 is rattled in the connecting shaft insertion step, that is, there is no possibility that the alignment state between the first bracket 11 and the second bracket 12 is released.

  When the connecting shaft 13 is inserted into the first bracket 11 and the second bracket 12, the shaft insertion jig 47 is removed from the connecting shaft 13 as shown in FIG. An O-ring 41 is mounted between the two parts. Then, the lid member 33 is fastened to the end portion of the connecting shaft 13 to which the O-ring 41 is attached by the fastening member 34 fitted with the seal washer 40, and the connecting shaft 13 and the lid member 33 are sufficiently brought into contact with each other. . When the lid member 33 is fixed to the connection shaft 13, a fixing member (fixing bolt) 39 for fixing the shaft cover member 35 is tightened. Then, the connecting shaft 13 engages with the passage non-forming shaft support portion 24 a via the lid member 33 and engages with the passage forming shaft support portion 24 b via the shaft cover member 35 and the seal presser 31. Further, the pressing projection 38 abuts against the side surface of the seal retainer 31 and pushes into the spherical bearing 18 side (first bracket 11 side), and compresses both seal rings 28 along the axial direction of the connecting shaft 13 (seal compression step). ). As a result, the spherical bearing 18 is sealed inside the bracket unit 3, and the damping oil damper 1 can be easily installed on the installation object 9 via the bracket unit 3. Note that it is preferable to adjust the tightening degree of the fastening member 39 using a torque wrench or the like because the compression amount of the seal ring 28 can be managed.

  By the way, in the said embodiment, although the 1st bracket 11 was fixed to the installation object 9, and the 2nd bracket 12 was fixed to the damper main body 2, this invention is not limited to this, The 2nd bracket 12 is installed. The first bracket 11 may be fixed to the damper main body 2 by being fixed to the object 9. In addition, as a representative example of the vibration damping damper, a vibration damping oil damper using oil has been described, but the present invention is not limited to this. In short, if it is a damper for vibration damping provided with a long damper body that expands and contracts along the longitudinal direction, and a bracket unit that connects the end of the damper body and the installation object in a rotatable state Anything is acceptable. Furthermore, although the spherical bearing 18 was mentioned and demonstrated as a self-aligning bearing with which the 1st bracket 11 is mounted | worn, this invention is not limited to this. In short, any self-aligning bearing that allows the first bracket 11 to swing along the axial direction of the connecting shaft 13 may be used. For example, a self-aligning roller bearing may be used.

It is the schematic of the oil damper for vibration suppression. It is sectional drawing of a bracket unit. It is a disassembled perspective view of a bracket unit. (A) is sectional drawing of the bracket unit in the state where the 1st bracket rock | fluctuated, (b) is the elements on larger scale of the periphery of the seal ring in (a). It is explanatory drawing of the procedure which installs the oil damper for damping | damping to an installation target object, (a) is explanatory drawing which attaches a channel | path non-formation side ring to a 1st bracket, (b) is a 1st bracket and a 2nd bracket, (C) is an explanatory diagram for attaching the passage forming side ring and the seal presser to the bracket unit, (d) is an explanatory diagram for attaching the shaft insertion jig and the shaft cover member to the connecting shaft, (E) is explanatory drawing which inserts a connecting shaft in a bracket unit, (f) is explanatory drawing which attaches a cover member to a bracket unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Damping oil damper 2 Damper main body 3 Bracket unit 5 Cylinder tube 6 Rod cover 9 Installation object 11 1st bracket 12 2nd bracket 13 Connection shaft 13a Passage side end face 15 First bracket base 16 Bearing holding part 18 Spherical bearing 18a Bearing hole 21 C-shaped retaining ring 23 Second bracket base 24 Shaft support portion 24a Passage non-forming shaft support portion 24b Passage forming shaft support portion 26 Connection hole 27 Passage forming hole 28 Seal ring 28a Passage non-forming side ring 28b Passage forming side ring 31 Seal holder 33 Lid member 34 Fastening member 35 Shaft cover member 37 Cover body 37a Insertion hole 38 Pressing projection 39 Fastening member 40 Sealed washer 41 O-ring 42 Sealed washer 43 O-ring 46 Positioning pin 47 Shaft insertion treatment Tool 49 Pin body 50 Pin side taper 51 Flange portion 53 connecting portion 54 jig-side taper portion

Claims (4)

A damping damper comprising a long damper body that expands and contracts along the longitudinal direction, and a bracket unit that connects the end of the damper body and an installation object in a rotatable state,
The bracket unit includes a first bracket mounted with a self-aligning bearing that allows the inclination of the shaft by a spherical seat, and two shaft support portions spaced apart in a bifurcated manner, and the first bracket between the two shaft support portions. A second bracket into which the bracket can be inserted, and a connecting shaft connected to both shaft support portions while being pivotally supported by the self-aligning bearing;
Either one of the first bracket or the second bracket is fastened to the end of the damper body, and the other is fastened to the object to be installed;
An annular seal ring is provided in a state where the connecting shaft is inserted inward at a position located on the outer ring side of the self-aligning bearing between the first bracket and each shaft support portion,
On one shaft support part, a connection hole that can be connected to the end of the connection shaft is opened.
In the other shaft support portion, a passage forming hole having a diameter larger than that of the connection hole is opened,
An annular seal retainer is accommodated in the passage forming hole, the outer diameter of the seal retainer is set to a dimension that fits in the passage forming hole, and the inner diameter is set to a dimension that fits the end of the connecting shaft. ,
A damper for damping vibration, wherein the end of the seal retainer is brought into contact with the seal ring, and a shaft cover member attached to the end face of the connecting shaft is brought into contact with the side of the seal retainer so that both seal rings can be compressed. . The shaft cover member includes a cover main body that covers the end surface of the connection shaft, a protrusion protruding from the outside of the cover main body toward the seal pressing side, and a pressing protrusion that can press the seal pressing toward the self-aligning bearing side; With
The vibration damper according to claim 1, wherein the pressing protrusion presses the seal pressing member in a state where a gap is formed between the cover body and the end surface of the connecting shaft.   The vibration damper according to claim 1 or 2, wherein a seal presser is slidable on the outer peripheral surface of the connection shaft. A method for installing a vibration damper according to any one of claims 1 to 3,
Inserting between the two bracket support portions of the second bracket, the first bracket and one seal ring superposed on the opposite side of the passage forming hole across the self-aligning bearing of the first bracket, An alignment step of aligning the first bracket and the second bracket by inserting an alignment pin into the connection hole, the passage forming hole, the one seal ring, and the self-aligning bearing in this state;
A seal pressing preparation step for placing the seal pressing member in the passage forming hole while arranging the other hole through the seal forming hole between the first bracket and the shaft support portion;
A shaft insertion jig having a tapered shape is connected to the end face of the connection shaft, the tip of the shaft insertion jig is brought into contact with the end of the alignment pin on the passage forming hole side, and the connection shaft is pushed in in this state for connection. A connecting shaft insertion step of inserting the hole, the passage forming hole, both seal rings and the self-aligning bearing, and removing the alignment pin;
Remove the shaft insertion jig from the connecting shaft, engage the connecting shaft and each shaft support, and push the seal retainer toward the self-aligning bearing side to compress both seal rings along the axial direction of the connecting shaft Sealing compression process to
The installation method of the damper for vibration suppression characterized by being installed in an installation target object through.

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