JPH0557370U - Reciprocating pump - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent an increase in the number of parts and a reduction in the efficiency of assembly work due to the oil pan that stores the lubricating oil 86 that permeates the felt packing 54 that is in sliding contact with the periphery of the plunger 62. In addition, the structure prevents the lubricating oil 86 from leaking to the outside despite the leakage of the lubricating oil 86 from the oil pan to some extent without complicating the structure and increasing the number of parts. [Constitution] The oil seal holding member 52 is a crankcase.
Cylindrical wall 70 that presses in and secures the oil seal 48 inside 12.
And the cylindrical wall 70 at the end opposite to the oil seal 48.
Has an end wall portion 72 that closes the cylinder, and a storage hanging portion 74 that opens at the upper end to the inner surface side of the cylindrical wall portion 70 and stores the lubricating oil 86. The felt packing 54 is an oil seal holding member.
The projecting edge portion 84 faces the opening 78 for exposing the felt packing in the upper portion of the cylindrical wall portion 70, and the strip portion 82 is dipped in the lubricating oil 86 in the storage hanging portion 74.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a reciprocating pump used in a power sprayer, a washing machine, etc., and more particularly to a reciprocating pump having an improved structure of a portion holding a lubricating liquid permeation member for supplying a lubricating liquid to a reciprocating member. is there.

[0002]

[Prior Art]

 In a reciprocating pump used in a power sprayer, a washing machine, etc., an oil seal is fixed in the crankcase by an oil seal holding member, and slidably contacts the reciprocating member such as a plunger on the inner peripheral side to remove the oil from the crankcase. Prevents leakage of crankcase oil. In addition, the felt packing is slidably penetrated by the reciprocating member and supplies lubricating oil to the peripheral part of the reciprocating member, suppressing wear of the seal that is in sliding contact with the reciprocating member on the tip side of the felt packing. is doing.

In conventional reciprocating pumps (eg, Japanese Utility Model Laid-Open No. 63-26780 and Japanese Utility Model Laid-Open No. 2-137573), an oil pan for storing the lubricating oil of the felt packing is located below the forward / backward moving member. It is assembled by being clamped between a crankcase and a joining member such as a manifold. Further, in order to prevent the leakage of the lubricating oil from the oil pan to the outside due to the inclination or the like, the oil pan is sealed or a lubricating oil holding member is provided.

[0004]

[Problems to be solved by the device]

 In the conventional reciprocating pump, an oil pan for storing the lubricating oil of the felt packing is separately required, so that the number of parts of the entire reciprocating pump is increased and the efficiency of the assembling work is reduced. In addition, sealing the oil pan to prevent the leakage of lubricating oil from the oil pan to the outside complicates the structure and increases the product cost, and adding a lubricating oil holding member is a component. This will lead to a further increase in points.

An object of the present invention is to prevent an increase in the number of parts and a decrease in the efficiency of assembly work due to the presence of an oil pan that stores a lubricating liquid for lubricating the peripheral portion of the reciprocating member, and to prevent the structure from increasing. An object of the present invention is to provide a reciprocating pump capable of suppressing the leakage of lubricating liquid to the outside without causing complexity and addition of parts.

[0006]

[Means for Solving the Problems]

 The invention will be described using the reference numerals of the drawings corresponding to the embodiments. The reciprocating pump (10) which is the premise of the present invention has the following components (a) to (d). (A) Oil seal (48) that prevents oil leakage from the crankcase (12) against sliding contact of the reciprocating member (62) on the inner peripheral side (b) Inner end of the reciprocating member (62) Member to be joined to the crankcase (12) while being inserted into the crankcase (12) (c) The joint member (64) to the crankcase (12) is pushed to the crankcase (12) side and the oil seal is attached. The oil seal holding member (52) that holds down (48) (d) The lubricating liquid (86) is passed through the reciprocating member (62) and slidingly contacts the reciprocating member (62) to the reciprocating member (62). Lubricant penetrating member (54) supplied and received by the oil seal holding member (52)

In the reciprocating pump (10) of the present invention, the oil seal holding member (52) has the following components (c1) to (c4). (C1) An annular wall portion (70) abutting against the oil seal (48) at one end side (c2) An end wall portion (72) which penetrates the reciprocating member (62) and covers the other end side of the annular wall portion (70) (C3) The inside of the annular wall portion (70) is opened to hang down from the annular wall portion (70) to store the lubricating liquid (86) and the lower end portion (82) of the lubricating liquid permeation member (54) is inserted. The storage hanging part (74) (c4) is opened to the upper part of the annular wall part (70) and the upper part (84) of the lubricating liquid permeating member (54) in the oil seal holding member (52) is replaced with the annular wall part (70). Opening (78) exposed on the outside of the

[0008]

[Action]

 The oil seal holding member (52) contains the lubricating liquid permeation member (54) inside, and also has the storage hanging part (74) for storing the lubricating liquid (86) and the annular wall part (70). And so on. The oil seal holding member (52) is pushed into the crankcase (12) by pushing the annular wall (70) toward the crankcase (12) as the joining member (64) is joined to the crankcase (12). ) And the joining member (64). The lubricating liquid (86) in the storage droop (74) penetrates into the lubricating liquid permeation member (54) from the lower end (82) of the lubricating liquid permeation member (54), and the lubricating liquid permeation member ( 54), and is supplied to the peripheral portion of the reciprocating member (62) via the lubricant permeation member (54).

When replenishing the lubricating liquid (86) to the storage droop (74), the lubricating liquid (86) passes through the opening (78) of the oil seal holding member (52) and the lubricating liquid penetrating member (54). ) Of the lubricating liquid permeation member (54) while penetrating into the synovial fluid permeation member (54) and guided to the lower part of the lubricating liquid permeation member (54). 74). If the lubricating fluid (86) overflows a little from the top of the storage droop (74) after filling the storage droop (74) due to a little too much replenishment of the lubricant (86), The lubricating liquid (86) spreads along the lower portion on the inner surface side of the annular wall portion (70) without immediately leaking to the outside of the oil seal holding member (52). The lubricating liquid (86) that has spread to the end wall portion (72) side in the annular wall portion (70) is blocked by the end wall portion (72) and is prevented from leaking to the outside of the oil seal holding member (52). It

[0010]

【Example】

 The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 4 is a vertical vertical sectional view of the plunger pump 10. The crankcase 12 of the plunger pump 10 is closed by a cover 14 on one end side, and the drain plug 15 is detachably screwed to the lower part of the cover 14 and is removed from the cover 14 when the oil in the crankcase 12 is drained. Be done. The crankshaft 16 extends in the horizontal direction and is rotatably supported by the crankcase 12 at both ends. The crosshead 20 is movably supported in the crankcase 12 in a horizontal direction perpendicular to the axial direction of the crankshaft 16, and is connected to the crankshaft 16 via a rod 22. The plunger 62 is screwed into the crosshead 20 at the base end side, and the manifold 64 is inserted into the crankcase 12 side so that the tip end side of the plunger 62 can be inserted / removed inside, and the crankcase is tightened with a tightening bolt (not shown). It is detachably joined to 12.

The oil seal 48 is fitted into the crankcase 12 from the manifold 64 side until it hits the retaining ring 50 in the crankcase 12, and is slidably contacted with the plunger 62 on the inner peripheral side, so that the oil in the crankcase 12 leaks out. Are prevented. The oil seal pressing member 52 is arranged on the manifold 64 side of the oil seal 48 and presses the oil seal 48 against the retaining ring 50. The felt packing 54 penetrates the plunger 62 and is housed in the oil seal pressing member 52. The lubrication port 68 is bored in the portion of the manifold 64 corresponding to the upper end of the felt packing 54, and the lubricating oil 86 (Fig. 1) is supplied to the felt packing 54 from the outside of the plunger pump 10 through the lubrication port 68. Be done. The manifold 64 has a suction port 40 and a discharge port 46 at a lower portion and an upper portion, respectively, and partitions the pump chamber 42 at a position on the tip side of the plunger 62. The seal case 56 is fitted into the manifold 64 from the crank case 12 side, and when the manifold 64 is joined to the crank case 12, the seal case 56 comes into contact with the oil seal holding member 52, and the oil seal holding member 52 is oiled. Push towards the seal 48. The U-packing 58 is fitted and fixed to the step portion on the inner peripheral side of the seal case 52, and seals against the sliding contact of the plunger 62 on the inner peripheral side. The suction valve 66 is arranged at the boundary between the suction port 40 and the pump chamber 42, and allows only the flow of the liquid from the suction port 40 to the pump chamber 42. The discharge valve 44 is arranged at the boundary between the pump chamber 42 and the discharge port 46 and allows only the flow of the liquid from the pump chamber 42 to the discharge port 46.

The plunger 62 reciprocates as the crankshaft 16 rotates. In the discharge stroke in which the plunger 62 moves to the pump chamber 42 side, the volume of the pump chamber 42 decreases, the suction valve 66 and the discharge valve 44 are closed and opened, respectively, and the liquid in the pump chamber 42 is discharged from the discharge port 46. Is discharged to. Further, in the suction stroke in which the plunger 62 moves toward the crankshaft 16, the volume of the pump chamber 42 increases, the suction valve 66 and the discharge valve 44 are opened and closed, respectively, and the liquid in the suction port 40 is stored in the pump chamber. Introduced to 42.

FIG. 1 and FIG. 2 are a side view showing a partial cross section of the oil seal pressing member 52 and a perspective view of the oil seal pressing member 52. In FIG. 1, the left and right ends are the pump chamber 42 side and the oil seal 48 side of FIG. 4, respectively, and the cylindrical wall portion 70 is opened on the oil seal 48 side and abuts against the oil seal 48. The pump chamber 42 side is covered with the end wall portion 72 and abuts on the seal case 56 (FIG. 4). The storage hanging part 74 is continuous on the wall surface on the side of the end wall part 72 so as to form the same plane as the wall surface of the end wall part 72, hangs downward from the cylindrical wall part 70 by an appropriate length, and is closed except for the upper part. The upper part opens into the cylindrical wall portion 70. The penetrating cylindrical wall 76 is provided in the center of the end wall portion 72, has an inner diameter slightly larger than the diameter of the plunger 62, and penetrates the plunger 62. The opening 78 for exposing the felt packing is formed in the upper end portion of the cylindrical wall portion 70 adjacent to the end wall portion 72.

FIG. 3 is a front view of the felt packing 54. The felt packing 54 has a circumferential portion 80 that is penetrated by the plunger 62 so as to be in sliding contact with the plunger 62 (FIG. 1) at the inner peripheral edge, a belt portion 82 that hangs from the circumferential portion 80, and a circumferential portion 80. And a projecting edge portion 84 formed at the upper end.

Referring back to FIGS. 1 and 2, the felt packing 54 has the projecting edge portion 84 facing the opening 78 for exposing the felt packing, and the belt portion 82 is inserted into the storage hanging portion 74 by a sufficient depth. As described above, the oil seal holder 52 is housed in the oil seal holder 52, penetrated by the plunger 62 at the center of the circumferential portion 80, and is in sliding contact with the plunger 62. The lubricating oil 86 is stored in the storage droop 74.

The operation of the embodiment will be described. The oil seal pressing member 52 accommodates the felt packing 54 inside and also integrally has a storage hanging portion 74 that stores the lubricating oil 86 together with the cylindrical wall portion 70 and the end wall portion 72. .. When the manifold 64 is joined to the crankcase 12, the oil seal retainer member 52 is pushed toward the crankcase 12 due to the contact with the seal case 56 on the manifold 64 side, and the oil seal holding member 52 is oiled at the end of the cylindrical wall portion 70. The seal 48 is pressed and fixed, and is assembled in the crankcase 12 and the manifold 64. The lubricating oil 86 in the storage hanging part 74 permeates into the band part 82 of the felt packing 54, rises in the band part 82 due to the capillary phenomenon, reaches the circumferential part 80, and reaches the inner peripheral edge of the circumferential part 80. Supplied to the circumference of the plunger 62. The lubricating oil 86 that wets the peripheral portion of the plunger 62 lubricates the U packing 58 and suppresses wear of the U packing 58.

When replenishing the lubricating oil 86 to the storage hanging portion 74, the lubricating oil 86 is dripped from the lubrication port 68 of the manifold 64 to the projecting edge portion 84 of the felt packing 54. While penetrating, it reaches the belt portion 82 via the circumferential portion 80, is guided from the belt portion 82 to the storage hanging portion 74, and is stored in the storage hanging portion 74. If the lubricating oil 86 slightly leaks from the upper end of the storage droop 74 because the amount of the lubricating oil 86 supplied is too large or the plunger pump 10 is tilted, etc. The oil seal holding member 52 does not immediately leak and spreads along the lower portion of the inner surface side of the cylindrical wall portion 70. The lubricating oil 86 that has spread to the end wall portion 72 side in the cylindrical wall portion 70 is blocked by the end wall portion 72 and is prevented from leaking to the outside of the oil seal pressing member 52.

In the illustrated embodiment, the plunger pump 10 is shown as a reciprocating pump, but the invention can be applied to other reciprocating pumps such as a forced valve type piston pump. In the forced valve type piston pump, a cylinder pipe or the like is joined to the crankcase 12 as a joining member instead of the manifold 64.

[0019]

[Effect of the device]

 The effects of this invention are as follows. (A) The oil pan that stores the lubricating liquid of the lubricating liquid permeation member is formed on the oil seal holding member as a storage hanging portion of the oil seal holding member for fixing the oil seal, and is used for assembling the oil seal holding member. Since they are assembled together, the number of parts can be reduced and the assembling work can be made more efficient. As a result, the manufacturing cost can be reduced. (B) The hanging part for storing the lubricating liquid is designed to open into the annular wall part, and the annular wall part has the end wall part at the end opposite to the oil seal. , If the amount of lubricating liquid supplied to the storage droop is a little too high or if the reciprocating pump is temporarily tilted and the lubrication liquid leaks from the storage droop, the lubricating liquid is Since it does not leak to the outside of the oil seal holding member immediately after spreading inside, it is possible to prevent the contamination and waste of the lubricating liquid due to the lubricating liquid outside the reciprocating pump. (C) In obtaining the effect of (b) above, it is not necessary to prepare an oil pan or an oil holding member in a hermetically sealed state, so that it is possible to avoid a complicated structure and an increase in the number of parts. (D) Since the lubricant permeation member is housed in the oil seal retainer, it is possible to prevent the lubricant permeation member from being lost, which makes it possible to rationalize storage and to prevent the lubricant permeation member from becoming contaminated with the lubricant. It is possible to reduce the touching situation.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross section of an oil seal pressing member.

FIG. 2 is a perspective view of an oil seal pressing member.

FIG. 3 is a front view of the felt packing.

FIG. 4 is a vertical longitudinal sectional view of the plunger pump.

[Explanation of symbols]

 10 Plunger Pump (Reciprocating Pump) 12 Crankcase 48 Oil Seal 52 Oil Seal Holding Member 54 Felt Packing (Lubricant Penetrating Member) 62 Plunger (Reciprocating Member) 64 Manifold (Joining Member) 70 Cylindrical Wall Part (Ring Wall Part) 72 End wall portion 74 Storage hanging portion 78 Felt packing exposing opening (opening portion) 82 Band portion (lower end portion) 84 Projected edge portion (upper end portion) 86 Lubricating oil (lubricant)

Claims (1)

[Scope of utility model registration request] 1. An oil seal (48) for preventing oil leakage from the crankcase (12) against sliding contact of the reciprocating member (62) on the inner peripheral side, and a tip end side of the reciprocating member (62). A joining member (64) that is joined to the crankcase (12) while being inserted inward, and to the crankcase (12) side with the joining of the joining member (64) to the crankcase (12). The reciprocating member (62) is slidably contacted with the reciprocating member (62) penetrated by the reciprocating member (62) and the oil seal pressing member (52) that is pushed to press the oil seal (48). In the reciprocating pump (10) having a lubricating liquid permeation member (54) which is supplied with the lubricating liquid (86) and is received by the oil seal pressing member (52), the oil seal pressing member (52) is
An annular wall portion (70) that contacts the oil seal (48) at one end side, and an end wall portion (72) that covers the other end side of the annular wall portion (70) while being penetrated by the reciprocating member (62). An opening into the annular wall portion (70) and hanging down from the annular wall portion (70) to store the lubricating liquid (86) and insert the lower end portion (82) of the lubricating liquid permeation member (54). The storage hanging part (74) and the oil seal holding member (52) which is opened in the upper part of the annular wall part (70).
The upper portion (84) of the lubricating liquid permeation member (54) in the annular wall portion
A reciprocating pump having an opening (78) exposed on the outer surface side of (70).