JP2013113402A - Lubricating device for hydraulic shock absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable injection of oil, by one-time work, to a piston chamber and a reservoir chamber in a cylinder of a double-cylinder type.SOLUTION: In a lubrication member 19 of a lubricating device 11 for a hydraulic shock absorber for injecting oil from an inner cylinder 2A and an outer cylinder 2B to a cylinder 2 of a hydraulic shock absorber 1 formed in a double cylinder shape, on a lower surface 22A2 of a disk part 22A of a lower case 22, an inner lubricating port 24 is provided which is positioned inside in a radial direction and injects oil to a piston chamber 4 within the inner cylinder 2A, and an outer lubricating port 25 is provided which is positioned outside in the radial direction rather than the inner lubricating port 24 and injects oil to a reservoir chamber 5 between the inner cylinder 2A and the outer cylinder 2B. Therefore, when the oil is supplied to the lubrication member 19, the oil can be injected at one time to the piston chamber 4 within the inner cylinder 2A and the reservoir chamber 5 between the inner cylinder 2A and the outer cylinder 2B by the inner lubricating port 24 and the outer lubricating port 25.

Description

  The present invention relates to an oiling device for a hydraulic shock absorber used for injecting an oil liquid into a cylinder forming a hydraulic shock absorber.

  Oil is injected into a cylinder forming the hydraulic shock absorber by a hydraulic shock absorber lubrication device. This hydraulic shock absorber lubrication device is configured to inject a predetermined amount of oil into the cylinder by discharging the supplied oil from one nozzle into the cylinder (see, for example, Patent Document 1). ).

JP 2009-127678 A

  According to Patent Document 1, since there is a single nozzle for lubrication, for a multi-cylinder cylinder composed of an inner cylinder and an outer cylinder, the piston chamber in the inner cylinder, the inner cylinder, and the outer cylinder Lubrication cannot be performed at two locations with the reservoir chamber at the same time, and the lubrication work takes time and productivity is reduced. An object of the present invention is to provide an oiling device for a hydraulic shock absorber that can inject an oil liquid into a double cylinder type cylinder in a single operation.

  In order to solve the above-described problem, the feature of the configuration adopted by the present invention is that the piston chamber in the inner cylinder and the cylinder of the hydraulic shock absorber formed in a double cylinder shape from the inner cylinder and the outer cylinder An oiling device for a hydraulic shock absorber that injects oil into a reservoir chamber between an inner cylinder and an outer cylinder, wherein an oiling member is provided on the upper side of the cylinder that is erected with the upper side opened, The member is provided with an inflow port through which oil liquid flows in from the outside, and the lower surface of the oil supply member facing the cylinder is provided with an inner oil supply port that is located on the inner side in the radial direction and that supplies oil to the piston chamber, The piston chamber and the reservoir chamber are provided by disposing an outer lubrication port that is located radially outside the inner lubrication port and that lubricates the reservoir chamber, and discharging oil from the inner lubrication port and the outer lubrication port. That it is configured to lubricate at once. That.

  According to the present invention, it is possible to inject an oil liquid into a double cylinder type cylinder in one operation.

It is sectional drawing which shows the double cylinder type hydraulic shock absorber used as the lubrication object of the lubricating device for hydraulic shock absorbers by embodiment of this invention. It is a whole lineblock diagram showing the oiling device for hydraulic shock absorbers by an embodiment of the invention. It is sectional drawing which expands and shows the oil supply member and cutoff valve in FIG. It is sectional drawing which expands and shows the oil supply member in FIG. It is a disassembled sectional view shown in the state which decomposed the oil supply member. It is the bottom view which looked at the oil supply member from the lower side. It is sectional drawing which shows several types of adjustment nozzles exchanged and attached to each oil supply port of an oil supply member. It is a top view which shows the resistance member in FIG. 5 alone.

  Hereinafter, a hydraulic shock absorber lubrication device according to an embodiment of the present invention will be described in detail with reference to FIGS.

  A configuration of a hydraulic shock absorber 1 including a double cylinder cylinder 2 into which an oil liquid is injected by a hydraulic shock absorber oil supply device 11 according to the present embodiment will be described with reference to FIG.

  The double-cylinder cylinder 2 constituting the outer shape of the hydraulic shock absorber 1 forms a double cylinder structure with a small-diameter inner cylinder 2A and a large-diameter outer cylinder 2B arranged coaxially outside the inner cylinder 2A. The lower part is closed by the bottom cap 2C. On the other hand, the upper part of the cylinder 2 is closed by a rod guide 3.

  Here, the inside of the inner cylinder 2A of the cylinder 2 is a piston chamber 4 that accommodates a piston 6 that will be described later, and between the inner cylinder 2A and the outer cylinder 2B, oil fluid corresponding to the entry volume of the piston rod 7 that will be described later is released. An annular reservoir chamber 5 is provided. A predetermined amount of oil is injected into the piston chamber 4 and the reservoir chamber 5 by a hydraulic shock absorber lubrication device 11 to be described later with the upper side opened before the rod guide 3 is attached.

  In the inner cylinder 2A of the cylinder 2, that is, in the piston chamber 4, a piston 6 is inserted so as to be movable in the axial direction. One end side of the piston rod 7 entering the inner cylinder 2A is attached to the piston 6 in the axial direction, and the other end side of the piston rod 7 protrudes from the cylinder 2 via the rod guide 3 so as to extend and contract. Yes.

  Next, an oiling device for a hydraulic shock absorber for injecting oil into the piston chamber 4 in the inner cylinder 2A and the reservoir chamber 5 between the inner cylinder 2A and the outer cylinder 2B, targeting the above-described double cylinder type cylinder 2. 11 will be described with reference to FIGS.

  FIG. 2 shows an oiling device 11 for a hydraulic shock absorber that injects oil into the piston chamber 4 and the reservoir chamber 5 of the cylinder 2. This hydraulic shock absorber lubrication device 11 has an oil storage tank 12 for storing oil to be supplied to the cylinder 2, and the oil storage tank 12 is connected to a downstream pump mechanism 14 via a first conduit 13. Has been. The pump mechanism 14 includes a pump portion 14A connected to the oil storage tank 12 via the first pipe 13 and an actuator 14B that drives the pump portion 14A. The operating range of the actuator 14B is limited by a stopper 14C. By doing so, the flow rate of the oil discharged from the pump unit 14A can be set appropriately.

  The pump portion 14 </ b> A of the pump mechanism 14 has a discharge side connected to a later-described shut-off valve 18 located on the downstream side via the second pipe 15. Here, the first conduit 13 is provided with a check valve 16 for circulating the oil only from the oil storage tank 12 toward the pump mechanism 14. The second conduit 15 is provided with a check valve 17 for allowing the oil liquid to flow only from the pump mechanism 14 toward the shutoff valve 18.

  The shut-off valve 18 provided on the downstream side of the second pipe line 15 opens when the pump mechanism 14 is supplying the oil liquid, and communicates between the second pipe line 15 and an oil supply member 19 described later. When the supply is stopped, the valve is closed to shut off the second pipe 15 and the lubricating member 19.

  That is, as shown in FIG. 3, the shut-off valve 18 includes a cylindrical casing 18A extending upward and downward, an annular valve seat 18C provided in an oil liquid passage 18B in the casing 18A, and the oil A valve body 18D that is located in the liquid passage 18B and is separated from and seated on the valve seat 18C to communicate and block the oil passage 18B. The oil liquid passage 18B extends upward and downward in the center portion of the casing 18A, and extends in the radial direction at a position upstream of the valve seat 18C to form a pipe connection portion 18B1. On the other hand, the lower end portion on the downstream side of the oil liquid passage 18B is an oil supply member mounting hole 18B2 formed of a female screw hole.

  Here, in the shutoff valve 18 according to the present embodiment, the valve body 18D is disposed on the oil supply member 19 side below the valve seat 18C, so that the valve body 18D is on the side opposite to the oil supply direction. It is displaced upward and seated on the valve seat 18C. Thus, when the valve body 18D is displaced upward and closed, when the valve body 18D is seated on the valve seat 18C, a part of the oil is drawn to the upstream side of the valve seat 18C. The oil liquid staying in the downstream side of 18B or in the oil supply member 19 can be pulled up to the upstream side.

  Next, the configuration of an oiling member 19 provided for simultaneously injecting oil into the piston chamber 4 and the reservoir chamber 5 of the cylinder 2 will be described.

  An oiling member 19 is provided at the lower end of the shut-off valve 18. As shown in FIG. 2, the oil supply member 19 is disposed on the upper side of the cylinder 2 erected with the upper side opened at a predetermined oil supply position, and discharges the oil toward the cylinder 2 at this position. It is. In this case, the lubricating member 19 can simultaneously lubricate the piston chamber 4 in the inner cylinder 2A and the reservoir chamber 5 between the inner cylinder 2A and the outer cylinder 2B in one operation. As shown in FIGS. 3 and 4, the oiling member 19 includes an upper case 20, a lower case 22, an inner oiling port 24, an outer oiling port 25, adjustment nozzles 26, 27 and 28, a resistance member 29, and the like which will be described later. Has been.

  As shown in FIG. 5, the upper case 20 of the lubricating member 19 is formed in a stepped cylindrical shape by a large diameter portion 20A located at the upper portion and a small diameter portion 20B located at the lower portion, and an axial direction is formed at the center portion thereof. A female screw hole 20C is formed. The lower surface 20D of the upper case 20 is formed with an expanded portion 20E that expands in a trumpet shape from the lower end portion of the female screw hole 20C toward the lower surface so that oil can be supplied to the outer oil filling port 25 described later. . Furthermore, a male screw 20F is engraved on the outer peripheral surface of the small diameter portion 20B.

  The lower part of the connecting pipe 21 is connected to the female screw hole 20 </ b> C of the upper case 20. The upper portion of the connection pipe 21 is screwed into the oil supply member mounting hole 18B2 of the oil liquid passage 18B constituting the shutoff valve 18. Inside the oil supply member 19 is an inflow port 21A for allowing the oil liquid to flow in from the shut-off valve 18 located outside.

  As shown in FIG. 4, the lower case 22 that forms the lower portion of the lubricating member 19 includes a disk portion 22 </ b> A provided facing the lower surface 20 </ b> D of the upper case 20 and a small diameter portion 20 </ b> B of the upper case 20. A cylindrical portion with a bottom is formed from a cylindrical portion 22B extending upward from the outer periphery of the disc portion 22A so as to surround. The disk portion 22A has an upper surface 22A1 and a lower surface 22A2 each formed as a flat surface. On the other hand, the inner peripheral surface of the cylindrical portion 22B is engraved with a female screw 22C that is screwed into the male screw 20F of the upper case 20.

  The lower case 22 has a female screw 22C in the cylindrical portion 22B screwed to a male screw 20F on the outer periphery of the small diameter portion 20B of the upper case 20. Thereby, the upper case 20 and the lower case 22 can be assembled together.

  Thus, in a state in which the upper case 20 and the lower case 22 are assembled, a buffer portion formed of a truncated cone space between the small diameter portion 20B (expanded portion 20E) and the upper surface 22A1 of the disc portion 22A. 23 can be formed. The buffer portion 23 communicates with the inlet 21A of the connection pipe 21, the inner oil supply port 24 and the outer oil supply port 25 of the lower case 22, and temporarily stores the oil supplied from the connection pipe 21. The oil liquid is circulated through the inner and outer oil filling ports 24 and 25 almost evenly.

  The disk portion 22A on the lower surface side of the oil supply member 19 is provided with an inner oil supply port 24 that is located on the inner side in the radial direction and penetrates upward and downward. The inner lubrication port 24 is disposed on the upper side of the piston chamber 4 located in the inner cylinder 2A which is the inner side of the cylinder 2 when the cylinder 2 is disposed at a predetermined lubrication position. As shown in FIG. 6, for example, eight inner oil filling ports 24 are provided at predetermined intervals in the circumferential direction so as to be concentric with the disk portion 22A, for example. Note that the number of the inner lubrication ports 24 is set according to conditions such as the size of the cylinder 2 to be lubricated, the amount of lubrication, and the like, and may be configured to be 1 to 7 or 9 or more.

  Furthermore, each inner oil filling port 24 has a female screw portion 24A on the lower side from the axial intermediate portion. The female screw portion 24A is formed in the same screw shape as a female screw portion 25A of the outer oil filling port 25 to be described later, whereby the female screw portion 24A of the inner oil filling port 24 and the female screw portion 25A of the outer oil filling port 25 are shared. A thread selected from a plurality of types of adjustment nozzles 26, 27, and 28, which will be described later, can be screwed into each of the female thread portions 24A and 25A.

  On the outer side in the radial direction of the disc portion 22 </ b> A that is on the outer side of each inner lubrication port 24, an outer lubrication port 25 that penetrates upward and downward is provided. Here, the outer oil filling port 25 is arranged above the reservoir chamber 5 located between the inner cylinder 2A and the outer cylinder 2B which are outside the cylinder 2 when the cylinder 2 is arranged at a predetermined oiling position. It is what is done. The outer oil filling port 25 has a female screw portion 25 </ b> A similar to the female screw portion 24 </ b> A of the inner oil filling port 24 on the lower side from the intermediate portion in the axial direction. For example, eight outer lubrication ports 25 are provided at a predetermined interval in the circumferential direction so as to draw a double circle by being arranged outside the inner lubrication port 24. As in the case of the inner lubrication port 24 described above, the outer lubrication port 25 may be provided with one or more, seven or less, or nine or more.

  In the present embodiment, common adjustment nozzles 26, 27, and 28 are attached to the inner oil supply port 24 and the outer oil supply port 25 of the oil supply member 19. That is, by attaching the adjustment nozzles 26, 27, 28 to the oil supply ports 24, 25, the cross-sectional areas of the passages of the oil supply ports 24, 25 can be adjusted. Therefore, the adjustment nozzles 26, 27, and 28 that form part of the inner oil filling port 24 and the outer oil filling port 25 will be described.

  As shown in FIG. 7, in the present embodiment, for example, three types of adjustment nozzles 26, 27, and 28 are prepared as nozzles provided in the respective oil filling ports 24 and 25. These adjusting nozzles 26, 27, and 28 are used by appropriately replacing and adjusting the cross-sectional area of the passage through which the oil liquid flows.

  The adjustment nozzle 26 shown in FIG. 7A has a large-diameter oil hole 26A penetrating in the axial direction, and a large amount of oil liquid can be discharged from the oil hole 26A within a predetermined time. . The outer peripheral side of the adjustment nozzle 26 is a male screw portion 26B that can be screwed to the female screw portion 24A of the inner oil supply port 24 or the female screw portion 25A of the outer oil supply port 25.

  On the other hand, the adjustment nozzle 27 shown in FIG. 7B has an oil hole 27A having a smaller diameter than the oil hole 26A having a large diameter, and a small amount of oil is discharged from the oil hole 27A within a predetermined time. can do. The outer peripheral side of the adjustment nozzle 27 is a male screw portion 27B.

  Further, the adjustment nozzle 28 shown in FIG. 7C is a plug (plug) having no oil hole, and can prevent the discharge of the oil liquid. The outer peripheral side of the adjustment nozzle 28 is a male screw portion 28A.

  The three types of adjustment nozzles 26, 27, and 28 are formed longer than the female screw portions 24 </ b> A and 25 </ b> A of the oil filling ports 24 and 25. As a result, as shown in FIG. 4, the adjustment nozzles 26, 27, and 28 are attached to the inner oil supply port 24 or the outer oil supply port 25, and the lower end portion of the disk portion that constitutes the lower case 22. The lower surface 22A2 of 22A can be projected downward by a dimension H. Further, the adjustment nozzles 26, 27, and 28 are formed as conical tapered portions 26C, 27C, and 28B by reducing the diameter of the protruding tip portions.

  As described above, the adjustment nozzles 26, 27, and 28 have conical tapered portions 26C, 27C, and 28B, and the tapered portions 26C, 27C, and 28B are located below the lower surface 22A2 of the disk portion 22A. Protruding. As a result, the tip end portions serving as the oil discharge ends of the adjustment nozzles 26, 27, and 28 can be disposed at positions away from the lower surface 22A2 of the disc portion 22A. Therefore, the oil liquid remaining in the adjustment nozzles 26 and 27 and It is possible to prevent the oil liquid adhering to the lower surface 22A2 of the disk portion 22A from coming into contact with the oil liquid. In addition, since the tapered portions 26C and 27C can increase the distance between the tip portions of the adjustment nozzles 26 and 27, it is possible to prevent the oil liquid from coming into contact with each other between the oil holes 26A and 27A.

  When a plurality of oil liquid particles are combined, the weight of one oil liquid particle after the combination is increased and cannot be supported by the surface tension, so that the surface tension collapses and the oil liquid drips down. On the other hand, since the adjustment nozzles 26, 27, and 28 can prevent the oil liquid particles from coming into contact with each other as described above, the adjustment of the oil liquid can be suppressed by maintaining the surface tension. it can.

  In the present embodiment, the case where only the adjustment nozzle 26 is attached to each inner oil supply port 24 and outer oil supply port 25 of the lower case 22 is illustrated. However, in addition to the adjustment nozzle 26, the adjustment nozzle 27 is attached to reduce the injection amount of the oil liquid, or the adjustment nozzle 28 is attached to stop the injection of the oil liquid, whereby the cross-sectional area of the passage through which the oil liquid circulates. Can be adjusted. By arranging the adjustment nozzles 26, 27, and 28 in an appropriate combination, it is possible to inject oil into a plurality of types of cylinders 2 having different specifications by a single oil supply member 19.

  The buffer member 23 of the oil supply member 19 is provided with a resistance member 29. This resistance member 29 gives resistance to the oil liquid and makes it difficult to flow to the respective oil inlets 24 and 25 when supply of the oil liquid to the oil inlets 24 and 25 is stopped. The resistance member 29 is provided in the buffer unit 23 so as to cover the oil filling ports 24 and 25 of the lower case 22 from the upstream side. As shown in FIG. 8, the resistance member 29 is configured as a grid-like (mesh-like) circular plate, and has a large number of small holes due to this grid structure.

  Here, since the resistance member 29 has a large number of small holes, the entire surface tension can be enhanced by the surface tension acting on each small hole. Thereby, in the state which stopped discharge of the oil liquid from each oil supply port 24 and 25, the flow to each oil supply port 24 and 25 side is blocked | prevented by the surface tension by the resistance member 29, and a dripping of oil liquid is prevented. can do.

  Next, an oiling method for injecting an oil solution into the cylinder 2 of the hydraulic shock absorber 1 using the hydraulic shock absorber lubricating device 11 will be described.

  The cylinder 2 with the upper side opened is arranged in a vertical position with the upper side opened at a lubricating position by the hydraulic shock absorber lubricating device 11. When the cylinder 2 is arranged at the oil supply position, the actuator 14B of the pump mechanism 14 is reduced, and the oil liquid in the oil storage tank 12 flows into the pump portion 14A via the first pipe 13 and the check valve 16. Next, when the amount of oil set by the stopper 14C flows into the pump unit 14A, the actuator 14B is extended to allow the oil in the pump unit 14A to pass through the second conduit 15 and the check valve 17. Supplied to the shut-off valve 18 side. At this time, the shutoff valve 18 is in an open state, and the oil supplied to the shutoff valve 18 is supplied to the oil supply member 19 through the oil passage 18B and the inlet 21A of the connection pipe 21.

  In the oil supply member 19, the supplied oil liquid is caused to flow into the buffer unit 23, thereby discharging the oil liquid from the inner oil supply port 24 and the outer oil supply port 25 arranged in a double circular shape toward the cylinder 2. . In this case, the lubrication member 19 is directed from the inner lubrication port 24 disposed on the inner side in the radial direction toward the piston chamber 4 in the inner cylinder 2A and from the outer lubrication port 25 disposed on the outer side in the radial direction to the outer cylinder 2A The oil liquid can be injected at a time toward the reservoir chamber 5 between the cylinder 2B.

  When a predetermined amount of oil is injected into the cylinder 2 from the pump portion 14A of the pump mechanism 14, the valve body 18D of the shutoff valve 18 is seated on the valve seat 18C and closed. At this time, the valve body 18D is displaced to the upper side on the upstream side and closed, thereby drawing a part of the oil liquid staying in the oil liquid passage 18B to the upstream side of the valve seat 18C. Along with this, the oil liquid staying in the oil solution passage 18B, the buffer portion 23 in the oil supply member 19 and the oil supply ports 24, 25 is also pulled up upstream, so that it is attached to the oil supply ports 24, 25. The oil liquid can be retracted so that the oil liquid does not spill from the tips of the oil holes 26A and 27A of the adjustment nozzles 26 and 27.

  When the supply of the oil liquid to the oil inlets 24 and 25 is stopped, the surface tension acting on the resistance member 29 in the buffer portion 23 also acts on the oil liquid in the oil holes 26A and 27A of the adjustment nozzles 26 and 27. To prevent oil from dripping from the tip. Furthermore, since the tip portions of the adjustment nozzles 26, 27, and 28 are conical tapered portions 26C, 27C, and 28B, the adjustment nozzles 26, 27 are projected downward from the lower surface 22A2 of the disk portion 22A. It is possible to prevent the oil remaining on the inside and the oil adhering to the lower surface 22A2 from coming into contact with each other, and preventing the oil from coming into contact with each other between the oil holes 26A and 27A. Also in this respect, dripping of the oil can be suppressed.

  Thus, according to the present embodiment, the oil supply member 19 of the oil supply device 11 for the hydraulic shock absorber that injects the oil liquid from the inner cylinder 2A and the outer cylinder 2B into the cylinder 2 of the hydraulic shock absorber 1 formed in a double cylinder shape. Is located on the lower surface 22A2 of the lower case 22 on the inner side in the radial direction and lubricated into the piston chamber 4 in the inner cylinder 2A, and on the outer side in the radial direction from the inner oil supply port 24. Thus, an outer oil filling port 25 for lubricating the reservoir chamber 5 between the inner tube 2A and the outer tube 2B is provided.

  Therefore, when the oil liquid is supplied to the oil supply member 19, the inner oil supply port 24 and the outer oil supply port 25 are used for the piston chamber 4 in the inner cylinder 2A and the reservoir chamber 5 between the inner cylinder 2A and the outer cylinder 2B. Oil solution can be injected at once.

  As a result, the hydraulic shock absorber lubrication device 11 applies the oil liquid to the piston chamber 4 and the reservoir chamber 5 in one operation even for the multi-cylinder cylinder 2 including the inner cylinder 2A and the outer cylinder 2B. Can be injected at the same time. Thereby, workability | operativity at the time of oiling work can be improved and productivity can be improved. Further, since the oil liquid can be simultaneously injected into the piston chamber 4 and the reservoir chamber 5, the oil liquid can be prevented from scattering due to the movement of the cylinder 2 or the lubricating member 19, and the working environment can be kept clean. .

  In addition, three types of adjustment nozzles 26, 27, and 28 having different cross-sectional areas of passages through which the oil liquid flows are appropriately selected and attached to the inner oil supply port 24 and the outer oil supply port 25. Therefore, the amount of oil supplied to the piston chamber 4 and the amount of oil supplied to the reservoir chamber 5 can be adjusted by appropriately combining the adjustment nozzles 26, 27, and 28 and attaching them to the inner oil supply port 24 and the outer oil supply port 25. As a result, the oil liquid can be injected into a plurality of types of cylinders 2 having different specifications depending on the single oil supply member 19.

  On the other hand, the adjustment nozzles 26, 27, 28 constituting a part of each of the oil filling ports 24, 25 protrude downward by a dimension H from the lower surface 22 A 2 of the disk portion 22 A of the lower case 22 constituting the oil filling member 19. The configuration is to let As a result, the tip portions of the adjustment nozzles 26, 27, and 28 serving as the oil discharge ends can be disposed at positions away from the lower surface 22A2 of the disc portion 22A, so that the inside of the oil holes 26A and 27A of the adjustment nozzles 26 and 27 It is possible to prevent the oil remaining on the oil and the oil adhering to the lower surface 22A2 of the disk portion 22A from coming into contact with each other. In addition, since the tips of the adjustment nozzles 26 and 27 are tapered portions 26C and 27C, the distance between the tip portions of the adjustment nozzles 26 and 27 can be increased, so that the oil liquid contacts and coalesces between the oil holes 26A and 27A. Can be prevented.

  As a result, since a plurality of oil liquid particles can be prevented from being combined and dripping, an accurate amount of oil liquid can be injected into the cylinder 2, improving the performance of the hydraulic shock absorber 1 and reducing manufacturing costs. Etc. can be achieved.

  Further, in the buffer portion 23 of the oil supply member 19, a lattice-like resistance member 29 having a large number of small holes is provided on the upstream side of the oil supply ports 24 and 25. Therefore, when the supply of the oil liquid to the respective oil filling ports 24 and 25 is stopped, the oil liquid can be given resistance by the action of the surface tension acting on the resistance member 29, and the oil liquid staying in the buffer portion 23 is It can prevent flowing to the oil filling ports 24 and 25 side. Also in this respect, the oil liquid can be prevented from dripping.

  Further, the connection pipe 21 of the oil supply member 19 is provided with a shutoff valve 18 that blocks the oil liquid passage 18 </ b> B through which the oil liquid flows toward the oil supply member 19. When the shut-off valve 18 is closed, the second pipe line 15 and the oil supply member 19 can be separated, and the oil liquid staying in the oil supply member 19 is retained in the second pipe line 15. It is possible to prevent such a situation that it is pushed out by the weight of the material.

  Moreover, in the shut-off valve 18, when the valve body 18D is closed, the shut-off valve 18 is displaced by being displaced to the upstream side and closed. Accordingly, when the valve body 18D is closed, a part of the oil liquid staying in the oil liquid passage 18B can be drawn to the upstream side of the valve seat 18C. The oil liquid staying in the buffer portion 23 and the oil filling ports 24 and 25 in the 19 can also be pulled up to the upstream side. Thereby, dripping of an oil liquid can be prevented.

  In addition, in embodiment, the case where it is set as the structure which provides the inner side oil supply port 24 and the outer side oil supply port 25 in the circumferential direction so that a double circle may be drawn is illustrated. However, the present invention is not limited to this, and one or more inner lubrication ports 24 and outer lubrication ports 25 may be provided in a number of 1 to 7 or 9 or more. Moreover, not only a double circle but a triple circle, a quadruple circle, or an irregular arrangement may be employed.

  In the embodiment, an example in which three adjustment nozzles 26, 27, and 28 having different passage cross-sectional areas are selectively attached to the inner oil supply port 24 and the outer oil supply port 25 of the oil supply member 19 is an example. And explained. However, the present invention is not limited to this, and the adjustment nozzle may be eliminated. Further, one type, two types, or four or more types of adjustment nozzles may be provided and attached to the inner oil supply port 24 and the outer oil supply port 25 in a replaceable manner.

  Furthermore, in the embodiment, the case where the resistance member 29 is formed as a lattice-like (mesh-like) circular plate is illustrated. However, the present invention is not limited to this. For example, the resistance member may be formed by forming a large number of small holes in a circular plate.

  Next, the invention included in the above embodiment will be described. In other words, in the present invention, the inner and outer oil filling ports are configured so that the cross-sectional area of the passage through which the oil liquid flows can be adjusted. As a result, the amount of oil supplied to the piston chamber and the amount of oil supplied to the reservoir chamber can be adjusted, so that the oil liquid can be injected into a plurality of types of cylinders having different specifications depending on one oil supply member.

  Further, according to the present invention, the inner oil supply port and the outer oil supply port are configured to protrude below the lower surface of the oil supply member. Therefore, since the tip of each lubrication port can be arranged at a position away from the lower surface of the lubrication member, the oil remaining in each lubrication port and the fluid adhering to the lower surface of the lubrication member come into contact and merge. Can be prevented. Thereby, since it can prevent that the particle | grains of a some oil liquid unite | combine and drop, an exact quantity of oil liquid can be inject | poured with respect to a cylinder.

  According to the present invention, the oil supply member is provided with a resistance member having a large number of small holes at a position covering each oil supply port from the upstream side, and when the resistance member stops the supply of the oil liquid to each oil supply port The oil liquid is resisted to prevent the flow to each oil inlet side. Thereby, it is possible to prevent the oil liquid staying in the oil supply member from flowing to the respective oil supply ports.

  According to the present invention, a shut-off valve that shuts off an oil liquid flow path for allowing the oil liquid to flow toward the oil supply member is connected to the inlet of the oil supply member. As a result, when the shut-off valve is closed, the oil supply line and the oil supply member can be separated from each other, and the oil remaining in the oil supply member is the weight of the oil remaining in the pipe. It is possible to prevent the situation where it is pushed out in

DESCRIPTION OF SYMBOLS 1 Hydraulic buffer 2 Cylinder 2A Inner cylinder 2B Outer cylinder 4 Piston chamber 5 Reservoir chamber 6 Piston 7 Piston rod 11 Lubricator for hydraulic buffer 18 Shut-off valve 18B Oil liquid passage 19 Lubrication member 20 Upper case 21 Connection pipe 21A Inlet 22 Below Side case 22A Disc part 22A2 Lower face 23 Buffer part 24 Inner oil supply port 25 Outer oil supply port 26, 27, 28 Adjustment nozzle 26A, 27A Oil hole 29 Resistance member H Nozzle protrusion size

Claims (5)

For a hydraulic shock absorber that injects oil into the piston chamber in the inner cylinder and the reservoir chamber between the inner cylinder and the outer cylinder with respect to the cylinder of the hydraulic shock absorber formed in a double cylinder shape from the inner cylinder and the outer cylinder A lubrication device,
An oiling member is provided on the upper side of the cylinder that is erected with the upper side opened,
The oil supply member is provided with an inlet through which oil liquid flows from the outside,
Provided on the lower surface of the oil supply member facing the cylinder is an inner oil supply port located on the inside in the radial direction for lubricating the piston chamber, and located on the outer side in the radial direction with respect to the inner oil supply port. Provide an external lubrication port to lubricate the chamber,
An oil supply device for a hydraulic shock absorber configured to supply oil to the piston chamber and the reservoir chamber at a time by discharging oil from the inner oil supply port and the outer oil supply port.   The oil injection device for a hydraulic shock absorber according to claim 1, wherein the inner oil supply port and the outer oil supply port are configured to be capable of adjusting a cross-sectional area of a passage through which an oil liquid flows.   The oil supply device for a hydraulic shock absorber according to claim 1 or 2, wherein the inner oil supply port and the outer oil supply port are configured to protrude below the lower surface of the oil supply member. The oil supply member is provided with a resistance member having a large number of small holes at a position covering each oil supply port from the upstream side,
The said resistance member becomes a structure which gives a resistance to an oil liquid and stops the flow to each said oil inlet side, when supply of the oil liquid to each said oil inlet is stopped. Lubricating device for hydraulic shock absorber as described in 1.   5. The hydraulic shock absorber according to claim 1, 2, 3, or 4, wherein a shutoff valve configured to shut off an oil liquid flow path through which an oil liquid flows toward the oil supply member is connected to the inlet of the oil supply member. Oiling device for dexterity.

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