TWM547038U - Structure of oil seal - Google Patents

Description

Oil seal structure

This creation is about a pump, especially an oil seal structure.

Most of the daily life of the pump is used to pump water from one place to another, such as a pumping motor. Alternatively, the lower pressure fluid can be drawn in and then sprayed in a high pressure mode, which can be used for rinsing or spraying, such as high pressure pumps and power sprayers. Among them, in the pump, there will be a crankcase to drive the plug rod to perform repeated linear motion to pump water and pressure drainage, and in order to avoid liquid penetration during the operation of the plug rod and to lubricate the plug rod, a plug will be provided at the plug rod. The oil seal structure, such as the pump disclosed in Taiwan Patent Nos. M396332 and 553315, has a similar structure.

In such conventional patents, the oil seal structure usually does not have any special structural design, and most of them only use ordinary ring rubber rings, so the lubricity is not good, and often the heat is deformed and hardened due to the repeated friction of the plug rod, thereby causing Poor adhesion, moisture easily enters the internal structure of the pump, causing major problems such as rust, and there are drawbacks that need to be improved.

Therefore, it is necessary to provide a novel and progressive oil seal structure to solve the above problems.

The main purpose of this creation is to provide an oil seal structure, which can effectively increase the oil content to increase the lubrication cooling effect, keep the structure of the oil seal ring intact, and maintain the existing tightness.

In order to achieve the above object, the present invention provides an oil seal structure for a mounting portion of a cylinder of a pump, and a plug rod is passed through in a direction in which the plug rod can be inserted. The direction is reciprocating linear motion relative to the oil seal structure, the oil seal structure comprising: a base ring and an oil seal assembly. The base ring is disposed on the inner wall of the mounting portion; the oil seal assembly is stacked on the base ring, the oil seal assembly includes a plurality of oil seal rings and at least one oil-containing gasket, wherein the at least one oil-impregnated washer is sandwiched between the oil seals Between the rings, each of the oil-impregnated gaskets is provided with a plurality of first holes.

The structural features of the present invention and the intended effects thereof will be described by way of example only, but are not intended to limit the scope of the present invention.

Referring to FIG. 1 to FIG. 4, an embodiment of the present invention is shown. The oil seal structure of the present invention is provided in a mounting portion 82 of a cylinder 81 of a pump 8 and is provided with a plug 83 along a The sealing rod 83 is reciprocally linearly moved relative to the oil seal structure along the wearing direction 85. The oil seal structure comprises a base ring 1 and an oil seal assembly 2.

The base ring 1 is disposed to abut against the inner wall of the mounting portion 82, and the oil seal assembly 2 is stacked on the base ring 1. The oil seal assembly 2 includes a plurality of oil seal rings 3 and at least one oil-containing washer 4, wherein At least one oil-containing gasket 4 is interposed between the two oil seal rings 3, and each of the oil-containing gaskets 4 is provided with a plurality of first holes 41.

It can be understood that the lubricating oil has a viscous property, and the design of the plurality of first holes 41 can greatly increase the contact area of the oil-containing gasket 4 with the lubricating oil, and more lubricating oil can be attached to the oil-containing gasket 4 Moreover, the space for accommodating the lubricating oil can be increased, thereby increasing the oil content of the entire oil seal assembly 2. In this way, when the plug rod 83 performs repeated linear motion, sufficient lubricating oil can be provided to lubricate the surface of the plug rod 83 to reduce friction, reduce heat generation, and prevent the oil seal ring 3 from being overheated. It is deformed by heat.

Preferably, each of the first hole portions 41 penetrates the oil-containing gasket 4 in a consistent direction so that the lubricating oil can flow smoothly and rapidly with the movement of the plug rod 83 to sufficiently perform more comprehensive lubrication. In this embodiment, each of the first hole portions 41 includes two circular holes and two straight holes that communicate with each other, and one of the straight holes penetrates the oil-impregnated gasket 4 obliquely in the extending direction.

Of course, the aspect of the plurality of first holes 41 is not limited to the above. Referring to another embodiment of FIG. 5, the plurality of first holes 41A are arranged to form a grid unit 9, the grid unit 9 The oil-containing gasket 4A is spread throughout the oil-impregnated gasket 4A so that the oil-containing gasket 4A has excellent oil-containing ability. Specifically, the oil-containing gasket 4A may be composed of a gauze or the like.

Referring to FIG. 1 to FIG. 4 again, in another preferred embodiment, the number of the at least one oil-containing gasket 4 is one less than the number of the plurality of oil seal rings 3, so that the oil-containing gasket is disposed between any two of the oil seal rings 3 4. To improve the oil content of the entire oil seal assembly 2 and to provide lubrication more evenly. In this embodiment, the number of the plurality of oil seal rings 3 is three.

It should be emphasized that the hardness of the base ring 1 is preferably greater than the hardness of each of the oil seal rings 3 to provide a stable supporting force to the oil seal assembly 2, and the oil seal ring 3 or the oil-containing gasket 4 can be prevented from following the plug rod. 83 moves and twists. The base ring 1 is provided with a bottom surface 11 which has a planar structure for abutting against the inner wall of the mounting portion 82 to increase stability.

Preferably, the bottom surface 11 is recessed with a recess 12, and a leak-proof ring 6 is embedded in the recess 12 to ensure that the bottom surface 11 and the inner wall of the mounting portion 82 have no gap, and the sealing degree is better. So that the lubricating oil will not leak out and the external liquid will not enter. Further, the base ring 1 is provided with a plurality of second hole portions 13, and similarly, a contact area with the lubricating oil can be provided to increase the oil content.

A first protrusion 14 is protruded from the base ring 1 , and a second protrusion 31 and a recess 32 are respectively disposed on opposite sides of the base ring 1 . The first protrusion 14 can be respectively disposed on the opposite sides. Optionally, a recess 32 is embedded, and each of the oil-impregnated washers 4 is interposed between a recess 32 of the oil seal ring 3 and a second protrusion 31 of the other seal ring 3. In the embodiment, each of the second holes 13 is a circular hole, and the plurality of second holes 13 are provided in the first protrusion 14 and do not penetrate the base ring 1 .

In addition, since the plug 83 is intended to squeeze water out to generate a large force, the oil seal structure has a specific mounting direction to resist the force. Therefore, in the embodiment, the bottom surface 11 is For the water inlet 84 of the pump 8, the first convex portion 14 and the second convex portion 31 are facing away from the water inlet 84. The cross section of the oil seal ring 3 is generally "<" shaped, and the cross section of the oil containing washer 4 is "" shaped.

Preferably, at least part of the size of the first protrusion 14 is greater than or equal to the size of the recess 321 of the recess 32, and the first protrusion 14 can expand the recess 32 to make the first protrusion A first gap 51 is formed between the recess 14 and the recess 32 to add space to accommodate the lubricating oil. Similarly, at least part of the size of the oil-containing gasket 4 is preferably greater than or equal to the size of the recess 321 of the recess 32, and a second gap 52 is formed between the oil-impregnated gasket 4 and the other recess 32.

It is to be noted that the oil seal structure further includes a limiting component 7 for abutting against the inner wall of the mounting portion 82. The limiting component 7 is disposed on the opposite side of the base ring 1 and then the base ring 1 The oil seal assembly 2 is interposed in the insertion direction 85 to limit the oil seal assembly 2 so as not to be eccentrically deformed with the plug rod 83, thereby ensuring assemblability and adhesion.

The limiting component 7 includes a ring 71 and a pressing member 72. The collar 71 is disposed in an inner ring wall 721 of the pressing member 72. The pressing member 72 is pressed against the wearing direction 85. In the oil seal assembly 2. In this embodiment, the outer diameter of the collar 71 is larger than the inner diameter of the inner ring wall 721, and the collar 71 is provided with a plurality of openings 711, so that the collar 71 can change part of the diameter to facilitate smoothness. The inner ring wall 721 is installed. It should be additionally noted that the lubricating oil may also penetrate into the inner ring wall 721 to increase the oil content of the entire oil seal structure.

In summary, the oil seal structure of the present invention can maintain sufficient lubricating oil to lubricate the plug rod, and can smoothly move the plug rod repeatedly. Moreover, more lubricating oil can reduce friction and reduce heat, so the oil seal assembly can be maintained at an appropriate temperature during use, and there is no problem that the structure deteriorates due to heat.

1‧‧‧Base ring
11‧‧‧ bottom
12‧‧‧Inlay
13‧‧‧Second hole
14‧‧‧First convex
2‧‧‧ oil seal assembly
3‧‧‧ oil seal ring
31‧‧‧second convex
32‧‧‧ recess
321‧‧‧ notch
4,4A‧‧‧oil gasket
41, 41A‧‧‧ first hole
51‧‧‧First gap
52‧‧‧Second gap
6‧‧‧ leaking ring
7‧‧‧Limited components
71‧‧‧ collar
711‧‧‧ incision
72‧‧‧Parts
721‧‧‧ inner ring wall
8‧‧‧ pump
81‧‧‧ cylinder
82‧‧‧Installation Department
83‧‧‧ plug
84‧‧‧ Inlet
85‧‧‧Distance direction
9‧‧‧ Grid unit

1 is a partial cross-sectional view of a pump according to an embodiment of the present invention. Figure 2 is a partial enlarged view of Figure 1. Fig. 3 is an exploded side elevational cross-sectional view showing the oil seal structure of an embodiment of the present invention. Figure 4 is a perspective view of Figure 3. Fig. 5 is an exploded perspective view showing the oil seal structure of another embodiment of the present invention.

1‧‧‧Base ring

2‧‧‧ oil seal assembly

7‧‧‧Limited components

8‧‧‧ pump

81‧‧‧ cylinder

82‧‧‧Installation Department

83‧‧‧ plug

84‧‧‧ Inlet

Claims (14)

An oil seal structure is provided in a mounting portion of a cylinder of a pump, and a plug rod is disposed through a plugging direction, and the plug rod can reciprocate relative to the oil seal structure along the wearing direction In the linear motion, the oil seal structure comprises: a base ring for abutting against an inner wall of the mounting portion; an oil seal assembly stacked on the base ring, comprising a plurality of oil seal rings and at least one oil-containing washer, the at least one oil-containing washer The oil-containing gasket is disposed between the two oil seal rings, and each of the oil-containing gaskets is provided with a plurality of first holes. The oil seal structure of claim 1, wherein the base ring is provided with a plurality of second holes. The oil seal structure of claim 1, wherein the base ring has a first convex portion protruding from the base ring, and each of the oil seal rings is respectively provided with a second convex portion and a concave portion on opposite sides, the first A convex portion is selectively embedded in the concave portion, and each of the oil-containing gaskets is interposed between a concave portion of the oil seal ring and a second convex portion of the other oil seal ring. The oil seal structure of claim 3, wherein at least a portion of the size of the first protrusion is greater than or equal to a size of a recess of the recess. The oil seal structure of claim 3, wherein a first gap is formed between the first convex portion and the concave portion, and a second gap is formed between the oil-containing gasket and the other of the concave portions. The oil seal structure of claim 1, wherein the hardness of the base ring is greater than the hardness of each of the oil seal rings. The oil seal structure of claim 1, wherein the base ring is provided with a bottom surface, and the bottom surface has a planar structure for abutting against an inner wall of the mounting portion. The oil seal structure of claim 7, wherein a recess is formed in the bottom surface, and a leak stop ring is embedded in the recess. The oil seal structure of claim 1, wherein the number of the at least one oil-containing gasket is one less than the number of the plurality of oil seal rings, and the oil-containing gasket is disposed between any two of the oil seal rings. The oil seal structure of claim 5, wherein the base ring is provided with a plurality of second holes; at least part of the size of the first protrusions is greater than or equal to the size of one of the recesses; the hardness of the base ring The base ring is provided with a bottom surface, and the bottom surface has a planar structure for abutting against the inner wall of the mounting portion; a recessed groove is recessed in the bottom surface, and a leak stop ring is embedded in the bottom surface a tank; the number of the at least one oil-containing gasket is less than the number of the plurality of oil seal rings; and the oil seal is disposed between the oil seal rings; each of the second holes is a circular hole; the plurality of second holes Provided in the first protrusion and not penetrating the base ring; the number of the plurality of oil seal rings is three; the bottom surface is for facing one of the water inlets of the pump, the first protrusion and the second protrusion are back To the water inlet; the cross-section of the oil seal ring is "<" shaped, and the cross-section of the oil-impregnated washer is "("-shaped; at least part of the size of the oil-impregnated washer is greater than or equal to the recess size of the recess . The oil seal structure according to claim 10, wherein each of the first hole portions penetrates the oil-impregnated gasket in a consistent direction, and each of the first hole portions includes two circular holes and two straight holes that communicate with each other, and one of the linear holes The oil-impregnated gasket is penetrated obliquely in the through direction. The oil seal structure of claim 10, wherein the plurality of first holes are arranged to form a grid unit, the grid unit being distributed throughout the oil-impregnated gasket. The oil seal structure according to any one of claims 1 to 12, further comprising a limiting component for abutting against an inner wall of the mounting portion, the limiting component being disposed on an opposite side of the base ring and further opposite to the base The ring seals the oil seal assembly in the direction of the insertion. The limit assembly includes a ring and a pressing member, and the ring is disposed to be located in an inner ring wall of the pressing member, and the pressing member is The sealing direction is pressed against the oil seal assembly. The oil seal structure according to claim 13, wherein the outer diameter of the collar is larger than the inner diameter of the inner ring wall, and the ring is provided with a plurality of openings.