JPH0682435U - Reciprocating sliding bearing - Google Patents

Abstract

(57) [Summary] [Purpose] In a reciprocating sliding bearing having a lubricant reservoir, it is possible to prevent oil shortage on the top side of the sliding bearing,
In addition, the present invention provides a reciprocating sliding bearing that efficiently scrapes the lubricant in the lubricant reservoir and moves the lubricant collected so that an excessive pressure is not applied to the lubricant. An oil ring 29 having a slit 30 and having an action of scraping up a lubricant 27 is movably fastened to a sliding shaft 21 of a reciprocating sliding bearing having a lubricant reservoir 26. A lubricant escape bypass 28 is provided on the top side of the lubricant reservoir 26 so that the lubricant 27 collected can be moved to the other lubricant reservoir 26. When the reciprocating sliding bearing moves relative to the oil ring 29 and the sliding shaft 21, the lubricant 27 present in the lubricant reservoir 26
Is collected by the oil ring 29 and fills the narrowed lubricant sump 26 with the lubricant 27, and then substantially most of the lubricant 27 passes through the lubricant escape bypass 28 and the other spread The lubricant is discharged into the lubricant reservoir 26.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reciprocating slide bearing having improved supply of lubricant, and a machine using the reciprocating slide bearing, which is a general mechanical element, such as a plastic molding machine, a food machine, an office machine, construction and civil engineering. The present invention relates to a reciprocating sliding bearing used in machines and the like.

[0002]

[Prior art]

 FIG. 5 shows a conventional reciprocating sliding bearing that slides back and forth in the axial direction.

Reference numeral 1 is a sliding shaft, 2 is a bush that contacts the sliding shaft 1 and supports the shaft, and the bush 2 is embedded in a work 3. A space enclosed by the bush 2 and the work 3 is a lubricant reservoir 6, and a grease gun 4 provided on the ground side of the work 3 allows a lubricant 7 such as grease to pass through an oil passage 5 with a grease gun. It is configured to be filled in the reservoir 6. The confirmation window 8 arranged on the top side of the work 3 is for confirming whether or not the lubricant reservoir 6 is completely filled with the lubricant 7. FIG. 6 shows a sectional view of the sliding shaft 1 in the lubricant reservoir 6.

[0004]

[Problems to be solved by the device]

 When the above-mentioned conventional reciprocating sliding bearing continues to reciprocate, the lubricant in the lubricant reservoir gradually decreases. When the amount of lubricant decreases, an unfilled space without lubricant is formed on the top side of the lubricant reservoir, and the lubricant does not spread to the sliding shaft exposed in this unfilled space. If the reciprocating slide receiver continues to operate in this state, scoring will occur on the top side of the sliding shaft, causing damage to the bearing.

In order to prevent such oil shortage on the top side of the sliding shaft, it is necessary to constantly fill the lubricant reservoir with the lubricant, and in order to do so, add more lubricant than necessary. In many cases, oil quantity is being controlled, and there was the problem of causing oil splash around the reciprocating sliding bearing.

The present inventor has devised a reciprocating sliding bearing for solving the above-mentioned problems and has already applied for it as Japanese Patent Application No. 4-55348. The invention described in the application is a reciprocating sliding bearing having a lubricant reservoir in which an oil ring having a scraping action and a squeezing action is movably fastened to a manual shaft in the lubricant reservoir. According to this reciprocating slide bearing, the relative reciprocating movement of the sliding shaft or the work causes the lubricant in the lubricant reservoir to be scraped up to fill the space in the lubricant reservoir, and is further squeezed to spatially Even if the amount of lubricant present in the lubricant reservoir is small, a substantial amount of it will move through the lubricant escape hole and slit into the lubricant reservoir on the opposite side where there is room. The lubricant will be evenly distributed at any position on the sliding shaft. Therefore, there is an effect that the lubricant is spread all over the circumference of the sliding shaft and the oil running out on the top side does not occur.

However, the reciprocating sliding bearing filed as the above-mentioned Japanese Patent Application No. 4-55348 has a lubricant escape hole in the oil ring itself. The amount of grease passing from the oil ring itself has not changed, and at slow speeds, the grease may not fill up in the lubricant pool on the side scraped by the oil ring. Furthermore, when the reciprocating movement of the sliding shaft is extremely fast, pressure is applied to the lubricant pool on the side scraped by the oil ring, so grease is supplied to the sliding part more than necessary, and the grease is exposed to the outside. There is a risk of protruding.

Therefore, the present invention prevents the oil from running out on the top side of the sliding shaft, efficiently scrapes the lubricant into the lubricant reservoir, and does not apply excessive pressure to the scraped lubricant, so that the sliding shaft The aim is to provide a reciprocating sliding bearing that can handle a wide range of reciprocating speeds.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a bearing having a lubricant pool in which a sliding shaft slides back and forth, and an oil ring having an action of scraping the lubricant is provided on the sliding shaft in the lubricant pool. It is characterized in that it is movably fastened and a lubricant escape bypass is provided on the top side in the lubricant reservoir of the bearing, which is a passage for moving the scraped lubricant to the other lubricant reservoir. It is a reciprocating sliding bearing.

[0010]

[Action]

 According to the present invention, in a reciprocating sliding bearing having a lubricant reservoir, when the reciprocating sliding bearing is moving relative to the oil ring and the sliding shaft, the lubricant present in the lubricant reservoir is The space in the lubricant sump, which is scraped up by the oil ring and narrowed by the relative movement of the oil ring, is filled with lubricant, and then substantially most of the lubricant is transferred to the top of the bearing sump. Through the provided lubricant escape bypass, the oil is sent out into the other lubricant reservoir that is expanded by the relative movement of the oil ring. When the relative reciprocating turnaround point of the reciprocating slide bearing is reached, a substantial majority of the lubricant movement is complete. Therefore, the lubricant is surely supplied to the top side of the sliding shaft.

The size of the lubricant escape bypass in the present invention is such that the lubricant collected in one lubricant reservoir by the oil ring moves to the other lubricant reservoir in response to changes in the reciprocating speed of the sliding shaft. However, if the lubricant is designed so that the pressure is not substantially applied, the lubricant will not be compressed even if the reciprocating speed of the sliding shaft increases. In addition, even if the reciprocating speed of the sliding shaft is slow, the lubricant escape bypass is provided on the top side of the bearing lubricant reservoir, so that the lubricant can be reliably supplied to the top side of the sliding shaft. To be done.

Since the tightening force of the oil ring can be set weakly by the shape of the slit provided on the oil ring, the lubricant pool is filled with the lubricant by scraping the oil ring. In the above, the oil ring that was previously fastened to the sliding shaft can now slide on the sliding shaft to deliver the full lubricant to the lubricant reservoir on the opposite side with a spatial margin. is there. Therefore, even by such adjustment, it is possible to prevent the lubricant from being compressed by the relative movement of the reciprocating sliding bearing.

[0013]

【Example】

 1 and 2 show a reciprocating sliding bearing of this embodiment.

Reference numeral 21 is a sliding shaft, 22 is a bush that contacts the sliding shaft 21 and supports the sliding shaft 21, and the bush 22 is embedded in a work 23. The space enclosed by the bush 22 supporting the sliding shaft 21 and the work 23 is a lubricant reservoir 26, and a lubricant 27 such as grease passes through an oil passage 25 provided on the ground side of the work 23 to collect the lubricant. 26 is configured to be filled. On the top side of the work 23, a confirmation window 31 for confirming whether or not the lubricant reservoir 26 is fully filled with the lubricant 27 is provided.

A disk donut-shaped oil ring 29 having an outer diameter slightly smaller than the inner diameter of the lubricant reservoir 26 is fitted to the sliding shaft 21 so that the sliding shaft 21 can be tightened. The tightening force is loosely tightened so that it can be moved with a certain amount of force. FIG. 3 shows an example of the oil ring 29 used in the present invention. Slots 30 are cut in the radial direction of these oil rings 29, and when fitted to the sliding shaft 21, the sliding shaft 21 is loosely fastened by the spring force acting inside.

When this oil ring 29 is set in a reciprocating sliding bearing, a very small gap 24 is formed between the inner wall of the lubricant reservoir 26 and the outer periphery of the oil ring 29. As a material for the oil ring, brass or plastic can be preferably used. The width of the slot 30 of the oil ring 29 and the gap size 24 between the work 23 and the bush 22 are preferably the smallest.

A lubricant escape bypass 28 is provided on the ceiling side in the lubricant reservoir 26 in the work 23. The size and shape of the lubricant escape bypass 28, their distribution position, and the like are appropriately set according to the conditions such as the sliding speed of the sliding shaft 21, the type of lubricant 27, the shape of the lubricant reservoir 26, and the like. Need to be formed. The lubricant escape bypass 28 can be formed, for example, by providing a recess on the top side of the work 23 as shown in FIGS. 1 and 2. FIG. 4 is a top view of the lubricant escape bypass portion 28 of the reciprocating sliding bearing of the present invention.

Although not shown, the lubricant escape bypass 28 of the present invention has a lubricant reservoir 26 in the vicinity of the holes penetrating the bush 22 and the work 23 at both ends of the reciprocating movement of the oil ring 29. It can also be formed by bypassing. Next, the operating state of the reciprocating sliding bearing of the present invention will be described with reference to FIGS.

Before the reciprocating motion, the lubricant 27 is accumulated on the ground side in the lubricant reservoir 26 in the state of FIG. When the work 23 relatively moves to the right as shown in FIG. 2, the oil ring 29, which exerts a tightening force on the sliding shaft 21, stays at the same position as the sliding shaft 21, and is shown in FIG. The lubricant 27 on the ground side is scraped off by the oil ring 29, and the left space portion of the narrowed lubricant reservoir 26 is filled with the lubricant 27.

Then, most of the filled lubricant 27 passes through the lubricant escape bypass 28, and a part of the lubricant passes through the slit 30 provided in the oil ring 29 to be expanded. It is sent to the right space portion of the lubricant reservoir 26. At the time when the lubricant 27 existing in the left space portion is substantially delivered, that is, when more than half of the total amount of lubricant has moved from the left space portion to the right space portion, 23 moves in the opposite direction, and the lubricant 27 is scraped, filled, and discharged in the same manner as described above.

By automatically repeating the same reciprocating operation every time, the lubricant 27 is evenly distributed in all parts of the sliding shaft 21 located in the lubricant reservoir 26. As long as there is a small amount of the lubricant 27 in the lubricant reservoir 26, oil will not run out over the entire circumference of the sliding shaft 21. In particular, in the present invention, since the lubricant escape bypass 28 is provided on the ceiling side in the lubricant reservoir 26 of the work 23, the lubricant 27 can be reliably moved by the forward and backward sliding of the work 23. Is supplied to the heaven side of.

In the above description, the work 23 is mainly moved, but even when the work 23 is fixed and the sliding shaft 21 reciprocates, the reciprocating slide having the oil ring 29 in the present invention is performed. The effect of the bearing is the same.

[0023]

[Effect of device]

 1. Even if the reciprocating speed of the sliding shaft or workpiece becomes faster, the lubricant pushed into one side of the narrowed lubricant reservoir will pass through the lubricant escape bypass provided on the top side in the lubricant reservoir. The lubricant is not compressed as it is delivered to the other enlarged lubricant reservoir.

2. In the thrust bearing oil ring of the present invention, the movement of the lubricant is substantially performed through the lubricant escape bypass, so that even if the lubricant is considerably reduced, the lubricant is evenly supplied to the sliding shaft. Have lasting.

3. Even if the reciprocating speed of the sliding shaft or the work becomes slower, the lubricant moves through the lubricant escape bypass provided on the top side in the lubricant reservoir. Is supplied to.

[Brief description of drawings]

FIG. 1 shows a reciprocating sliding bearing of an embodiment, showing a state before movement of a work.

FIG. 2 shows a reciprocating sliding bearing of the embodiment, showing a state after the work is moved.

FIG. 3 shows an example of an oil ring used in the present invention.

FIG. 4 is a top view of a lubricant escape bypass portion of the reciprocating sliding bearing of the present invention.

FIG. 5 shows a conventional reciprocating sliding bearing that slides back and forth in the axial direction.

FIG. 6 shows a sectional view of a sliding shaft in a lubricant reservoir.

[Explanation of symbols]

 21 Sliding Shaft 22 Bush 23 Work 24 Gap 25 Oil Path 26 Lubricant Reservoir 27 Lubricant 28 Lubricant Relief Bypass 29 Oil Ring 30 Slot 31 Confirmation Window

Claims (1)

[Scope of utility model registration request] 1. In a bearing having a lubricant reservoir in which a sliding shaft slides back and forth, an oil ring having an action of scraping the lubricant is movably fastened to the sliding shaft in the lubricant reservoir, and the bearing is also provided. The reciprocating sliding bearing is characterized in that a lubricant escape bypass, which is a passage for moving the collected lubricant to the other lubricant reservoir, is provided on the top side in the lubricant reservoir.