JP2017048698A - Output shaft lubricating structure for liquid pressurizing pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an output shaft lubricating structure for a liquid pressurizing pump which is capable of maintaining favorable lubrication for a long time and effectively elongating a service life of an output shaft and/or a rotary ring.SOLUTION: In an output shaft lubricating structure for a liquid pressurizing pump, a first eccentric part 43 of an output shaft 40 acts as a maximum load receiving portion upon pressurizing a liquid and thereby motive force of the output shaft 40 itself causes a second eccentric part 45 to press an extensible piston 95 of an oil feeder 90. This causes lubricant oil inside a center hole 11 to be sucked up, then after being pressurized, the oil is fed into an oil supply deep hole 46 inside the output shaft 40 and is forcibly discharged from an oil outlet hole 47 onto the surface of the first eccentric part 43. By implementing the circulative replenishment as the above, a rotary ring 44 that comes into contact with a plunger 30 can be lubricated favorably for a long time when rotated around the first eccentric part 43, thereby a service life of the output shaft 40 and/or the rotary ring 44 can be effectively elongated.SELECTED DRAWING: Figure 4

Description

  The present invention can rotate the rotating wheel on the output shaft and maintain good lubrication between the output shaft and the rotating wheel for a long period of time, thereby reducing wear and tear between the output shaft and the rotating wheel. The present invention relates to an output shaft lubrication structure of a liquid pressurizing pump that can extend the life.

  A sprayer device used for air conditioning or horticultural use can realize an ideal spray effect when liquid is ejected from a spray head by pressurizing the liquid. The operation of pressurizing the liquid is performed by a liquid pressurizing pump. In the conventional centrifugal blade type liquid pump, infusion (lift) is mainly considered, and the liquid pressure is not high, so the sprayer device cannot realize a good spraying effect. In addition, the conventional spiral liquid pressurizing pump has a good liquid boosting effect, but requires extremely high precision for member operation.

  However, in general, the nebulizer device has an economical problem because a low manufacturing cost is required. Further, the conventional crankshaft plunger type liquid pressurizing pump has a good liquid pressure increasing effect. However, since the crankshaft driven by the motor pressurizes the liquid by pushing and pulling the plunger, it is necessary to consider that the operation of each crank on the crankshaft does not interfere with each other. Since it becomes longer, the required space becomes larger, and it is necessary to produce the liquid pressurizing part and the power machine part separately. For this reason, there are many necessary members, the entire volume is large, and it is inconvenient for the mounting arrangement. In the liquid pressurizing pump of Patent Document 1, the liquid in the chamber is pressurized by a plunger that is interlocked with an eccentric shaft.

  Although the liquid pressurization pump of patent document 1 is small, when the eccentric part of the eccentric shaft drives the plunger, a pressing rotary wheel is fitted on the eccentric part, and the rotatable pressing rotary ring is a plan. When pressing and driving the jar end surface, it is possible to reduce the frictional resistance or abrasion between the eccentric portion and the plunger end surface.

  However, due to poor lubrication between the surface of the eccentric part and the pressing rotary wheel, there is a problem that the abrasion between the eccentric shaft and / or the pressing rotary wheel is very fast. In particular, this phenomenon becomes more prominent when subjected to a working pressure of 1000 Psi or more for a long period of time. The cause is that the eccentric shaft is generally driven and rotated by a 4-pole motor (without a speed reduction mechanism) at a rotational speed of 1720 to 1740 RPM, and the eccentric part and the pressing rotary wheel are operated in a state of being immersed in lubricating oil. However, the rotational speed of both is equal to the rotational speed of the eccentric shaft, the lubricating oil is blown off by the centrifugal force generated when the eccentric part and the pressing rotary wheel rotate at high speed, and the lubricating oil on the surface of the eccentric part is washed away. The high-speed rotating eccentric part and the pressing rotating wheel blow off the lubricating oil that soaks into the surface of the eccentric part, and the lubricating oil that has flowed out is not replenished before the rotation stops, thus causing a problem of poor lubrication.

  If lubricating oil that has been blown off and washed away when the eccentric part rotates at high speed can be replenished at any time, the above-mentioned drawbacks can be solved, and the service life of the eccentric shaft and / or the pressing rotary wheel can be extended. Even when the operating pressure reaches 2600 Psi (high pressure), the eccentric shaft and the pressing rotary wheel can maintain durability.

Taiwan Patent Registration No. I394893 (European Registration No. 2405137, US Registration No. 8333572, Japanese Utility Model Registration No. 3170418, Chinese Utility Model No. 2010202633943.0)

  An object of the present invention is to provide an output shaft lubrication structure for a liquid pressurizing pump that can maintain good lubrication for a long period of time and can effectively extend the service life of an eccentric shaft and / or a pressing rotary wheel.

  In order to solve the above-mentioned problem, the invention of the first aspect is an output shaft lubrication structure of a liquid pressurizing pump comprising a pump body, a plurality of plunger caps, a plurality of plungers and an output shaft, and the pump body Is a machine chamber and has a center hole filled with lubricating oil, and a plurality of fixed holes are arranged radially in the radial direction of the center hole, and a liquid inlet / outlet is provided in the radial direction of each fixed hole. Each liquid inlet / outlet communicates with a check valve, and the liquid inlet check end and the liquid outlet check end of each check valve communicate with the liquid inlet connection hole and the liquid outlet connection hole, respectively. The inlet / outlet prevents the ingress liquid from flowing back by the check valve, the external liquid enters from the inlet connection hole, and each plunger cap is fitted with the cap body on the fixing hole of the pump body. The interior has a liquid pressurizing chamber and communicates with the liquid inlet / outlet in the radial direction of one end of the liquid pressurizing chamber. At least one through hole is opened, and each plunger is mounted in the liquid pressurizing chamber of the plunger cap. One end of the plunger extends to enter the center hole of the pump body, and the output shaft is a bottom cover. And fixed to both ends of the center hole of the pump body by the inner lid and hermetically mounted in the center hole, the output shaft has an output end and a main shaft body, and the output end extends to the outside of the bottom lid and is connected to the motor The main shaft body is driven by the motor to rotate in the center hole, and a first eccentric portion is formed at one end portion facing each plunger on the main shaft body, and on the first eccentric portion, A rotating wheel that is in contact with one end of the plunger is mounted, and the rotating wheel rotates in the center hole by the first eccentric portion, and each plunger is pressed in turn by the eccentric acting force of the rotating wheel. Liquid pressurization by being displaced into the liquid pressurization chamber The liquid that has entered the inside is pressurized by the plunger and discharged from the liquid inlet / outlet, and the check valve prevents the discharged liquid from flowing backward, and the pressurized liquid flows out of the outlet connection hole and is used. A mounting hole is opened at a position shifted from the radial fixing hole of the central hole of the main body, and the output shaft is mounted in the central hole by the bottom cover and the inner cover, and is positioned at a position facing the mounting hole of the main shaft body. The second eccentric portion is formed, the output shaft is mounted on the end of the inner lid, an oil supply deep hole is opened in the axial direction inside the main shaft body, and faces the oil supply deep hole of the inner cover. In the position, an oil passage through hole is opened, the oil passage through hole outside is sealed by an outer lid to form an oil supply chamber, one end of the oil supply chamber is connected to an oil pipe by a plug, The other end of the oil supply chamber communicates with the oil supply deep hole through the oil supply through hole and faces the first eccentric portion in the radial direction of the oil supply deep hole. At least one oil outlet hole penetrating to the surface of the first eccentric portion is provided, and an oil feeder is provided on the mounting hole of the pump body. Located at the end, the oil check valve is sealed and fixed, the outer end of the oil check valve is connected to the oil pipe by a pipe plug, and an oil liquid pressurizing chamber is formed inside the oil feeder, An expansion / contraction piston pressed by a compression spring is provided in the oil pressure chamber, and the expansion / contraction piston has an oil check valve portion that slides up and down in the oil pressure chamber, and the oil check valve portion One end of the pressure tube is provided with a pressing tube that extends in the direction of the center hole and abuts on the second eccentric portion of the output shaft, and one end of the pressing tube extends into the center hole. The pressure tube is provided with one or more oil absorption holes that allow the oil pressure chamber to communicate with the center hole.

  With this configuration, the first eccentric portion of the output shaft serves as the maximum load receiving force during the liquid pressurizing operation, and the second eccentric portion presses the telescopic piston of the oil feeder by the power of the output shaft itself. Actuate, suck the lubricating oil in the center hole, pressurize it, send it out into the oil supply deep hole inside the output shaft, and forcibly release it from the oil outlet hole onto the surface of the first eccentric part to perform circulation replenishment Thus, when the rotating wheel that contacts the plunger rotates on the first eccentric portion, the liquid pressurization can maintain good lubrication for a long time and can effectively extend the service life of the output shaft and / or the rotating wheel. A pump output shaft lubrication structure is provided.

  According to the second aspect of the present invention, in the first aspect, at least one oil discharge hole is opened at a position facing the first eccentric portion in the radial direction of the oil supply deep hole inside the output shaft. A concave annular groove connected to the outlet of the oil discharge hole is provided on the surface of the eccentric portion.

  With this configuration, the output annular lubrication structure of the liquid pressurizing pump is provided in which the concave annular groove is provided so that the rotating wheel mounted on the first eccentric portion is entirely lubricated.

  The invention of the third aspect is that, in the first aspect, the oil supply chamber is formed by the outer lid sealing the outside of the oil passage through hole of the inner lid, and the oil supply chamber is formed between the oil supply chamber and the oil passage through hole. The filter is attached.

  With this configuration, an impurity is removed by the filter when the filter is mounted, so that an output shaft lubrication structure of the liquid pressurizing pump that purifies the lubricating oil is provided.

  According to a fourth aspect of the present invention, in the first aspect, the oil discharge check valve of the oil feeder has a valve base, and the valve base is in the form of a nut and is a female screw portion at the opening position of the mounting hole. A valve chamber is formed inside, and one end of the valve chamber is provided with a female screw hole to which a pipe plug is connected, and the other end of the valve chamber is pressurized with oil. There is a valve port that communicates with the chamber, and a tension spring that presses the ball and always seals the valve port is provided in the valve chamber.

  With this configuration, a tension spring is provided to provide an output shaft lubrication structure for a liquid pressurization pump that prevents the oil at the end of the tube plug from flowing back into the oil pressurization chamber.

  According to a fifth aspect of the present invention, in the first aspect, the telescopic piston of the oil feeder has an oil-filled check valve portion, and a valve chamber is formed in the oil-filled check valve portion. One end is connected to the tube hole of the pressure tube, communicates with the center hole through the oil absorption hole, and the other end of the valve chamber supports the tension spring to press the ball to A support member that seals the opening is fixed, and a through hole is formed on the support member, whereby the valve chamber and the oil pressure chamber communicate with each other.

  With this configuration, there is provided an output shaft lubrication structure for a liquid pressurizing pump that prevents the fluid in the oil pressurizing chamber from flowing back to the center hole by communicating the valve chamber and the oil pressurizing chamber. .

  According to a sixth aspect of the present invention, in the first aspect, the oil discharge check valve of the oil feeder is sealed and fixed to the opening end of the mounting hole, and a storage tube is provided at the inner end of the oil discharge check valve. An oil / liquid pressurizing chamber is formed inside the storage tube to store the compression spring and the expansion / contraction piston, and the pressure tube of the expansion / contraction piston extends from one end of the storage tube to the center hole and extends to the output shaft. Are brought into contact with and combined with the second eccentric portion.

  With this configuration, an output shaft lubrication structure for a liquid pressurizing pump is provided, in which the oil feeder can be conveniently attached to or detached from the attachment hole.

  According to a seventh aspect of the present invention, in the first aspect, the oil discharge check valve of the oil feeder is sealed and fixed to the opening end of the mounting hole, and an oil liquid additive formed at the inner end of the oil discharge check valve is formed. The pressure chamber has a first slide cover made of a material excellent in tribological characteristics that faces the expansion / contraction piston and slides the oil-filled check valve portion, and a second slide made of a material excellent in tribological characteristics that slides the pressure tube. And a cover.

  With this configuration, there is provided an output shaft lubrication structure for a liquid pressurizing pump that can reduce frictional resistance force or abrasion when the telescopic piston slides in an oil liquid pressurizing chamber.

  According to an eighth aspect of the invention, in the first aspect, a plug is provided at one end of the oil supply chamber inside the outer lid, and an oil pipe is provided at the outer end of the oil discharge check valve of the oil feeder. A pipe plug to be connected is provided, and one end of the radiator is connected to the other end of the oil pipe, and the other end of the radiator is connected to the plug by an oil pipe.

  With this configuration, there is provided an output shaft lubrication structure for a liquid pressurizing pump in which the operating temperature generated when the output shaft is operated in the center hole is easily dissipated in the process of circulating the lubricating oil in the center hole.

  ADVANTAGE OF THE INVENTION According to this invention, the output-shaft lubrication structure of the liquid pressurization pump which can maintain favorable lubrication for a long period of time and can effectively extend the service life of an eccentric shaft and / or a pressing rotary wheel is realizable.

It is a disassembled perspective view which shows the output-shaft lubrication structure of the liquid pressurization pump of one Embodiment of this invention. It is the figure which expanded the A section of FIG. It is a cross-sectional view which shows the pump main body of this invention. It is a longitudinal cross-sectional view which shows the pump main body of this invention. It is a disassembled perspective view which shows the structure of the oil feeder of this invention. It is sectional drawing which shows the oil absorption state of the oil feeder of this invention. It is sectional drawing which shows the oil-feeding state of the oil feeder of this invention. It is sectional drawing which shows the other Example of the oil feeder of this invention. It is sectional drawing which shows the state which connected the heat radiator to the oil feeder of this invention.

  The output pressure lubrication structure of the liquid pressurizing pump according to the embodiment of the present invention includes a pump body 10, a plurality of plunger caps 20, a plurality of plungers 30, and an output shaft 40, as shown in FIGS. .

  The pump body 10 is a machine chamber and has a center hole 11 that is filled with lubricating oil. In the radial direction of the center hole 11, a plurality of fixing holes 12 are arranged radially. A liquid inlet / outlet 13 is provided in the radial direction of each fixing hole 12. Each liquid inlet / outlet 13 communicates with a check valve 14. The liquid inlet check end and the liquid outlet check end of each check valve 14 communicate with the liquid inlet connection hole 15 and the liquid outlet connection hole 16. The liquid inlet / outlet 13 is prevented from flowing back by the check valve 14, and the external liquid enters from the liquid inlet / outlet hole 15.

  Each plunger cap 20 has a cap body 21 mounted on the fixing hole 12 of the pump body 10. The cap body 21 has a plurality of plunger packing rings 22 and a liquid pressurizing chamber 23 is formed. At least one through hole 24 is opened in the radial direction of one end of the liquid pressurizing chamber 23 and communicates with the liquid inlet / outlet 13.

  Each plunger 30 is mounted in the liquid pressurizing chamber 23 of the plunger cap 20, and one end of the plunger 30 extends to enter the center hole 11 of the pump body 10.

  The output shaft 40 is fixed to both ends of the center hole 11 of the pump body 10 by a bottom cover 50 and an inner cover 60, and a bearing 51 and an oil ring 52 are combined and sealed in the center hole 11. The output shaft 40 has an output end 41 and a main shaft body 42. The output end 41 extends to the outside of the bottom lid 50 and is connected to a motor (not shown). The main shaft 42 is driven by the motor and rotates in the center hole 11.

  A first eccentric portion 43 is formed at one end portion of the main shaft body 42 facing each plunger 30. On the first eccentric portion 43, a rotating wheel 44 that is in contact with one end portion of the plunger 30 is mounted. The rotating wheel 44 rotates in the center hole 11 by the first eccentric portion 43. Due to the eccentric acting force of the rotating wheel 44, the plungers 30 are sequentially pressed and displaced into the liquid pressurizing chamber 23, whereby the liquid that has entered the liquid pressurizing chamber 23 is pressurized by the plunger 30, The liquid discharged from the liquid inlet / outlet 13 is prevented from flowing back by the check valve 14, and the pressurized liquid flows out from the liquid outlet connection hole 16 and is used.

  As a feature of the present invention, a mounting hole 17 is opened at a position shifted from the radial fixing hole 12 of the central hole 11 of the pump body 10. The output shaft 40 is mounted in the center hole 11 by the bottom cover 50 and the inner cover 60, and a second eccentric portion 45 is formed at a position facing the mounting hole 17 of the main shaft body 42. The output shaft 40 is mounted on the end of the inner lid 60. An oil supply deep hole 46 is formed in the main shaft body 42 in the axial direction. An oil passage through hole 62 is opened at a position facing the oil supply deep hole 46 of the inner lid 60. The outside of the oil passage through hole 62 is sealed with an outer lid 70 to form an oil supply chamber 71.

  One end portion of the oil supply chamber 71 is connected to the oil pipe 80 by a plug 72, and the other end portion of the oil supply chamber 71 communicates with the oil supply deep hole 46 through an oil passage through hole 62. At a position facing the first eccentric portion 43 in the radial direction of the oil supply deep hole 46, at least one oil outlet hole 47 penetrating to the surface of the first eccentric portion 43 is opened.

  An oil feeder 90 is provided on the mounting hole 17 of the pump body 10. The oil feeder 90 is located at the opening end of the mounting hole 17, and the oil discharge check valve 91 is sealed and fixed. The outer end of the oil discharge check valve 91 is connected to the oil pipe 80 by a pipe plug 92, and an oil liquid pressurizing chamber 93 is formed inside the oil feeder 90.

  An expansion / contraction piston 95 that is pressed by a compression spring 94 is provided in the oil pressure chamber 93. The expansion / contraction piston 95 has a piston-shaped oil-filled check valve portion 96 that slides up and down in the oil liquid pressurizing chamber 93. A pressure pipe 97 that extends in the direction of the center hole 11 and is in contact with the second eccentric portion 45 of the output shaft 40 is provided at one end of the oil entry check valve portion 96.

  One end of the pressing tube 97 extends into the center hole 11. Further, the pressure tube 97 is provided with one or more oil absorption holes 98 that allow the oil pressure chamber 93 to communicate with the center hole 11. When the output shaft 40 is driven by a motor, the rotating wheel 44 on the first eccentric portion 43 drives each plunger 30 to reciprocate in the liquid pressurizing chamber 23 of the plunger cap 20, and the liquid pressurizing chamber. The liquid in 23 is pressurized.

  In addition, when the pressurized liquid is allowed to flow out from the end of the liquid discharge connection hole 16, as shown in FIGS. 6 and 7, the expansion / contraction piston 95 of the oil feeder 90 receives the support of the compression spring 94 and the output shaft 40. The end of the pressing tube 97 that is always in contact with the second eccentric portion 45 is intermittently pressed, and the second eccentric portion 45 rotates and the expansion / contraction piston 95 reciprocates up and down in the oil pressure chamber 93. Exercise.

  As shown in FIG. 6, when the expansion / contraction piston 95 moves out of the oil pressure chamber 93, a negative pressure is formed in the oil pressure chamber 93, and the valve of the oil check valve portion 96 is opened. The lubricating oil inside is sucked into the oil liquid pressurizing chamber 93 from the oil absorbing hole 98 and is replenished.

  Further, as shown in FIG. 7, when the expansion / contraction piston 95 moves into the oil liquid pressurizing chamber 93, a positive pressure is formed in the oil liquid pressurizing chamber 93, and the oil liquid is pressurized by the expansion / contraction piston 95, The check valve 91 is opened, injected along the oil pipe 80 into the oil supply chamber 71 inside the outer lid 70, and the oil supply deep hole 46 inside the output shaft 40 is pressurized from the end of the oil supply chamber 71. The liquid can be obtained, and the lubricating oil is forcibly discharged from the oil outlet hole 47 to the surface of the first eccentric portion 43, and the lubricating oil returns to the center hole 11.

  As shown in FIGS. 3, 6, and 7, the entire structure is such that the first eccentric portion 43 of the output shaft 40 serves as a load maximum receiving force portion during the liquid pressurizing operation. Further, the second eccentric portion 45 presses and operates the expansion and contraction piston 95 of the oil feeder 90 by the power of the output shaft 40 itself, sucks and pressurizes the lubricating oil in the center hole 11, and supplies oil inside the output shaft 40. By feeding into the deep hole 46 and forcibly releasing the oil from the oil discharge hole 47 onto the surface of the first eccentric portion 43 to perform circulation replenishment, the rotating wheel 44 that contacts the plunger 30 is placed on the first eccentric portion 43. When rotating at, good lubrication can be maintained for a long time, and the service life of the output shaft 40 and / or the rotating wheel 44 can be effectively extended.

  Based on the above-described embodiment, as shown in FIGS. 1, 2, and 4, at a position facing the first eccentric portion 43 in the radial direction of the oil supply deep hole 46 inside the output shaft 40, one or more The oil discharge hole 47 is opened. A concave annular groove 48 connected to the outlet of the oil discharge hole 47 is provided in the radial direction on the surface of the first eccentric portion 43. Accordingly, the lubricating oil can be forcibly released from the oil outlet hole 47 and flow along the concave annular groove 48, and the speed of replenishing the oil liquid flowing away from the surface of the first eccentric portion 43 can be increased. When the rotating wheel 44 mounted on the eccentric portion 43 rotates, the entire surface is lubricated.

  Based on the above-described embodiment, as shown in FIGS. 1 and 4, the outer lid 70 seals the oil passage through hole 62 of the inner lid 60 to form the oil supply chamber 71. A filter 73 is mounted between the oil supply chamber 71 and the oil passage through hole 62. As a result, the iron scraps and impurities contained in the lubricating oil in the center hole 11 are sucked up by the oil feeder 90 and are circulated under pressure to be returned from the oil discharge hole 47 into the central hole 11. In the process, since it is removed by the filter 73, the lubricating oil is purified.

  Based on the above-described embodiment, as shown in FIGS. 1, 4, and 5, the oil discharge check valve 91 of the oil feeder 90 includes a valve base 910. The valve base 910 is in the form of a nut and is screwed onto the female thread portion at the opening position of the mounting hole 17 to form a valve chamber 911 therein. A female screw hole 912 to which the pipe plug 92 is connected is provided at one end of the valve chamber 911. The other end of the valve chamber 911 has a valve port 913 communicating with the oil pressure chamber 93. In the valve chamber 911, a tension spring 914 that presses the ball 915 to always seal the valve port 913 is provided.

  As shown in FIG. 7, when the expansion / contraction piston 95 is pressed by the second eccentric portion 45 of the output shaft 40 and contracted and displaced into the oil liquid pressurizing chamber 93, the oil liquid in the oil liquid pressurizing chamber 93 is expanded. The ball 915 receives an oil liquid pressure (pressing force) and is separated from the valve port 913 to open the valve, and the pressurized oil liquid is sent to the end of the tube plug 92. On the other hand, as shown in FIG. 6, when the expansion / contraction piston 95 is returned to the outside of the oil pressure chamber 93 by the compression spring 94 and extended and displaced, the ball 915 seals the valve port 913, and the oil at the end of the tube plug 92. The liquid is prevented from flowing back into the oil liquid pressurizing chamber 93.

  Based on the above-described embodiment, as shown in FIGS. 1, 4, and 5, the telescopic piston 95 of the oil feeder 90 has an oil-filled check valve portion 96. A valve chamber 960 is formed in the oil check valve portion 96. A tube hole 970 of the pressing tube 97 is connected to one end of the valve chamber 960 and communicates with the center hole 11 through the oil absorption hole 98. A support member 961 that supports the tension spring 962 and presses the ball 963 to seal the opening of the tube hole 970 is fixed to the other end of the valve chamber 960. Further, the through-hole 964 is opened on the support member 961, so that the valve chamber 960 and the oil liquid pressurizing chamber 93 communicate with each other.

  As shown in FIG. 6, when the elastic force of the compression spring 94 extends and displaces the expansion / contraction piston 95 in the direction outside the oil / liquid pressurizing chamber 93, the oil / liquid pressurizing chamber 93 is slid by sliding on the oil-filled check valve portion 96. A negative pressure is formed on the ball 963, and the ball 963 is sucked and pulled away from the tube port of the tube hole 970 by the negative pressure, so that the valve is opened, and the lubricating oil in the center hole 11 passes through the oil absorption hole 98 into the oil liquid pressurizing chamber 93. Inhaled and replenished. On the contrary, as shown in FIG. 7, when the second eccentric portion 45 of the output shaft 40 presses the expansion / contraction piston 95 into the fluid pressurizing chamber 93 and contracts and displaces, the ball 963 opens the tube opening of the tube hole 970. Sealing is performed to prevent the oil solution in the oil solution pressurizing chamber 93 from flowing back into the center hole 11.

  Based on the above-described embodiment, the oil discharge check valve 91 of the oil feeder 90 is sealed and fixed to the opening end of the mounting hole 17 as shown in FIGS. A storage pipe 99 made of a material having excellent tribological characteristics is provided at the inner end of the oil discharge check valve 91. An oil liquid pressurizing chamber 93 is formed inside the storage tube 99 to store the compression spring 94 and the expansion / contraction piston 95. Thus, the pressing tube 97 of the expansion / contraction piston 95 extends from one end of the storage tube 99 to the center hole 11 and is brought into contact with the second eccentric portion 45 of the output shaft 40 to be combined. The storage pipe 99 allows the compression spring 94 and the expansion / contraction piston 95 to be combined and fixed on the oil discharge check valve 91, so that the oil feeder 90 can be mounted or removed from the mounting hole 17 conveniently. .

  Based on the above-described embodiment, as shown in FIG. 8, the small liquid pressurizing pump is configured such that the oil discharge check valve 91 of the oil feeder 90 is sealed and fixed to the opening end of the mounting hole 17. The oil pressure chamber 93 formed at the inner end of the valve 91 has a first slide cover 990 made of a material excellent in tribological characteristics that opposes the expansion / contraction piston 95 and slides the oil-injection check valve portion 96, and a pressure And a second slide cover 991 made of a material excellent in tribological characteristics for sliding the tube 97. Since the first slide cover 990 and the second slide cover 991 have excellent tribological characteristics, it is possible to reduce the frictional resistance force or the abrasion loss when the expansion / contraction piston 95 slides in the oil / liquid pressurizing chamber 93.

  Based on the above embodiment, as shown in FIG. 9, a plug 72 is provided at one end of the oil supply chamber 71 inside the outer lid 70. A pipe plug 92 to which an oil pipe 80A is connected is provided at the outer end of the oil discharge check valve 91 of the oil feeder 90. One end of the radiator 81 is connected to the other end of the oil pipe 80A. A plug 72 is connected to the other end of the radiator 81 by an oil pipe 80B. When the oil feeder 90 pressurizes the lubricating oil in the center hole 11 and transports it to the end of the oil supply chamber 71, the lubricating oil passing through the radiator 81 is radiated and the output shaft 40 is operated in the center hole 11. The operating temperature generated during the process is easily dissipated in the process of circulating the lubricating oil in the center hole 11.

  The above description is for explaining the present invention, and is not intended to limit the present invention. Any modifications, changes, etc. made without departing from the spirit of the present specification are covered by the protection scope of the present invention. include.

DESCRIPTION OF SYMBOLS 10 Pump main body 11 Center hole 12 Fixed hole 13 Liquid inlet / outlet 14 Check valve 15 Inlet connection hole 16 Outlet connection hole 17 Mounting hole 20 Plunger cap 21 Cap body 22 Plunger packing ring 23 Liquid pressurizing chamber 24 Through hole 30 Plunger 40 Output shaft 41 Output end 42 Main shaft body 43 First eccentric part 44 Rotating wheel 45 Second eccentric part 46 Oil supply deep hole 47 Oil discharge hole 48 Concave annular groove 50 Bottom cover 51 Bearing 52 Oil ring 60 Inner cover 61 Bearing 62 Oil passage through hole 70 Outer cover 71 Oil supply chamber 72 Plug 73 Filter 80 Oil tube 80A Oil tube 80B Oil tube 81 Radiator 90 Oil feeder 91 Oil discharge check valve 910 Valve stand 911 Valve chamber 912 Female screw hole 913 Valve port 914 Tension spring 915 Ball 92 Pipe plug 93 Oil pressure chamber 94 Compression spring 95 Telescopic piston 96 Oil filling Check valve 960 valve chamber 961 support member 962 tension spring 963 ball 964 through hole 97 pressing tube 970 lumen 98 oil hole 99 housing tube 990 first slide cover 991 second slide cover

In order to solve the above-mentioned problem, the invention of the first aspect is an output shaft lubrication structure of a liquid pressurizing pump comprising a pump body, a plurality of plunger caps, a plurality of plungers and an output shaft, and the pump body Is a machine chamber and has a center hole filled with lubricating oil, and a plurality of fixed holes are arranged radially in the radial direction of the center hole, and a liquid inlet / outlet is provided in the radial direction of each fixed hole. Each liquid inlet / outlet communicates with a check valve, and the liquid inlet check end and the liquid outlet check end of each check valve communicate with the liquid inlet connection hole and the liquid outlet connection hole, respectively. The inlet / outlet prevents the ingress liquid from flowing back by the check valve, the external liquid enters from the inlet connection hole, and each plunger cap is fitted with the cap body on the fixing hole of the pump body. The interior has a liquid pressurizing chamber and communicates with the liquid inlet / outlet in the radial direction of one end of the liquid pressurizing chamber. At least one through hole is opened, and each plunger is mounted in the liquid pressurizing chamber of the plunger cap. One end of the plunger extends to enter the center hole of the pump body, and the output shaft is a bottom cover. And fixed to both ends of the center hole of the pump body by the inner lid and hermetically mounted in the center hole, the output shaft has an output end and a main shaft body, and the output end extends to the outside of the bottom lid and is connected to the motor The main shaft body is driven by the motor to rotate in the center hole, and a first eccentric portion is formed at one end portion facing each plunger on the main shaft body, and on the first eccentric portion, A rotating wheel that is in contact with one end of the plunger is mounted, and the rotating wheel rotates in the center hole by the first eccentric portion, and each plunger is pressed in turn by the eccentric acting force of the rotating wheel. Liquid pressurization by being displaced into the liquid pressurization chamber The liquid that has entered the inside is pressurized by the plunger and discharged from the liquid inlet / outlet, and the check valve prevents the discharged liquid from flowing backward, and the pressurized liquid flows out of the outlet connection hole and is used. at a position offset with fixing holes in the radial direction of the central bore of the body mounting hole is opened at a position opposed to the mounting hole of the main shaft member, the second eccentric portion is formed in the interior of the main shaft member The oil supply deep hole is opened in the axial direction, the oil passage through hole is opened at the position facing the oil supply deep hole of the inner lid, and the outside of the oil passage through hole is sealed by the outer cover. An oil chamber is formed, one end of the oil supply chamber is connected to the oil pipe by a plug, and the other end of the oil supply chamber communicates with the oil supply deep hole through the oil through-hole. At least one oil discharge hole penetrating to the surface of the first eccentric portion is opened at a position facing the first eccentric portion in the radial direction of An oil feeder is provided on the mounting hole of the main body, and the oil feeder is located at the opening end of the mounting hole. The oil discharge check valve is sealed and fixed, and the outer end of the oil discharge check valve is The oil plug is connected to the oil pipe by a pipe plug, an oil liquid pressurizing chamber is formed inside the oil feeder, and an expansion / contraction piston pressed by a compression spring is provided in the oil liquid pressurizing chamber. It has an oil-filled check valve portion that slides up and down in the fluid pressurizing chamber. One end of the oil-filled check valve portion extends in the direction of the center hole and is on the second eccentric portion of the output shaft. A pressure tube is provided, and one end of the pressure tube extends into the center hole, and the pressure tube is provided with one or more oil absorption holes that allow the oil pressure chamber to communicate with the center hole. It is done.

Claims (8)

An output shaft lubrication structure of a liquid pressurization pump comprising a pump body, a plurality of plunger caps, a plurality of plungers and an output shaft,
The pump body has a center hole that is a machine chamber and is filled with lubricating oil, and a plurality of fixed holes are arranged radially in the radial direction of the center hole, and in the radial direction of each of the fixed holes, A liquid inlet / outlet is provided, and each liquid inlet / outlet communicates with a check valve. In communication with the hole, the liquid inlet / outlet is prevented from flowing back into the liquid by the check valve, and external liquid enters from the liquid inlet connection hole,
Each plunger cap has a cap body mounted on the fixing hole of the pump main body, the cap body has a liquid pressurizing chamber, and in the radial direction of one end of the liquid pressurizing chamber , At least one through hole communicating with the liquid inlet / outlet is opened,
Each plunger is mounted in a liquid pressurizing chamber of the plunger cap, one end of the plunger extends and enters the center hole of the pump body,
The output shaft is fixed to both ends of the center hole of the pump body by a bottom cover and an inner cover and is hermetically mounted in the center hole. The output shaft has an output end and a main shaft body, and the output end is , Extending to the outside of the bottom lid, connected to a motor, the main shaft body is driven by the motor to rotate in the central hole, and at one end portion facing each plunger on the main shaft body A first eccentric portion is formed, and a rotating wheel that contacts one end of the plunger is mounted on the first eccentric portion, and the rotating wheel is centered by the first eccentric portion. The plunger is rotated in the hole, and the plungers are pressed in sequence by the eccentric acting force of the rotating wheel and displaced into the liquid pressurizing chamber, so that the liquid entering the liquid pressurizing chamber is moved to the plunger. From the liquid inlet / outlet Issued, the discharge liquid by the check valve is prevented from flowing backward, pressurized liquid from the liquid-leaving connecting hole is used to flow out,
A mounting hole is opened at a position shifted from the fixed hole in the radial direction of the central hole of the pump body, and the output shaft is mounted in the central hole by the bottom cover and the inner cover, and the main shaft body A second eccentric portion is formed at a position opposite to the mounting hole, the output shaft is mounted on the end of the inner lid, and an oil supply deep hole is opened in the axial direction inside the main shaft body. An oil passage through hole is formed at a position of the inner lid facing the oil supply deep hole, and the oil passage through hole outside is sealed by the outer lid to form an oil supply chamber. One end of the oil supply chamber is connected to an oil pipe by a plug, and the other end of the oil supply chamber communicates with the oil supply deep hole through the oil passage through hole, and the diameter of the oil supply deep hole is At a position facing the first eccentric portion in the direction, there is at least one oil discharge hole penetrating to the surface of the first eccentric portion. An oil feeder is provided on the mounting hole of the pump body, the oil feeder is located at an opening end of the mounting hole, and an oil discharge check valve is sealed and fixed; The outer end of the check valve is connected to the oil pipe by a pipe plug, an oil pressure chamber is formed in the oil feeder, and the oil pressure chamber is expanded and contracted by a compression spring. A piston is provided, and the expansion / contraction piston has an oil check valve portion that slides up and down in the fluid pressurizing chamber, and one end portion of the oil check valve portion is provided in the center hole. A pressing tube is provided that extends in the direction of and is in contact with the second eccentric portion of the output shaft, and one end of the pressing tube extends into the center hole, and the pressing tube includes: One or more oil absorption holes for communicating the oil liquid pressurizing chamber with the central hole are provided. Structure.   One or more oil discharge holes are opened at a position facing the first eccentric portion in the radial direction of the oil supply deep hole in the output shaft, and the surface of the first eccentric portion has the oil discharge hole. 2. The output shaft lubrication structure for a liquid pressurizing pump according to claim 1, further comprising a concave annular groove connected to the outlet.   An oil supply chamber is formed by the outer lid sealing the outside of the oil passage through hole of the inner lid, and a filter is mounted between the oil supply chamber and the oil passage through hole. The output shaft lubrication structure of the liquid pressurizing pump according to claim 1.   The oil check valve of the oil feeder has a valve base, the valve base is in the form of a nut and is screwed onto a female thread portion at the opening position of the mounting hole, and a valve chamber is formed therein. Formed at one end of the valve chamber is provided with a female screw hole to which the pipe plug is connected, and the other end of the valve chamber has a valve port communicating with the oil pressure chamber. 2. The output pressure lubrication structure for a liquid pressurizing pump according to claim 1, wherein a tension spring is provided in the valve chamber for pressing the ball and always sealing the valve port.   The telescopic piston of the oil feeder has an oil-filled check valve portion, a valve chamber is formed in the oil-filled check valve portion, and one end portion of the valve chamber has A tube hole is connected, communicates with the center hole through the oil absorption hole, and supports the tension spring at the other end of the valve chamber to press the ball to seal the opening of the tube hole. 2. The liquid pressurizing pump according to claim 1, wherein a support member is fixed and a through hole is formed on the support member, whereby the valve chamber communicates with the oil liquid pressurizing chamber. Output shaft lubrication structure.   The oil check valve of the oil feeder is sealed and fixed to the opening end of the mounting hole, a storage pipe is provided at the inner end of the oil check valve, An oil liquid pressurizing chamber is formed to store the compression spring and the expansion / contraction piston, and a pressing tube of the expansion / contraction piston extends from one end of the storage tube to the center hole and extends to the second of the output shaft. 2. The output shaft lubrication structure for a liquid pressurizing pump according to claim 1, wherein the output shaft lubrication structure is brought into contact with the eccentric portion and combined.   An oil discharge check valve of the oil feeder is sealed and fixed to an opening end of the mounting hole, and an oil liquid pressurizing chamber formed at an inner end of the oil discharge check valve is opposed to the telescopic piston. The first slide cover made of a material excellent in tribological characteristics for sliding the oil-injection check valve portion, and the second slide cover made of a material excellent in tribological characteristics for sliding the press tube are provided. The output shaft lubrication structure of the liquid pressurization pump according to claim 1 characterized by things.   A plug is provided at one end of the oil supply chamber inside the outer lid, and a pipe plug to which an oil pipe is connected is provided at the outer end of the oil discharge check valve of the oil feeder. The liquid pressurization according to claim 1, wherein one end of a radiator is connected to the other end, and the other end of the radiator is connected to the plug by an oil pipe. Pump output shaft lubrication structure.