JP2540282Y2 - Reciprocating sliding bearing - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating sliding bearing having an improved lubricant supply, and a machine using a reciprocating sliding bearing as a general mechanical element, for example, a plastic molding machine, a food machine, The present invention relates to a reciprocating sliding bearing used for office machines, construction and civil engineering machines, and the like.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional reciprocating sliding bearing which reciprocates and slides in an axial direction. 1 is a sliding shaft, 2 is a bush which contacts the sliding shaft 1 and supports the shaft, and the bush 2 is embedded in the workpiece 3. The space sealed by the bush 2 and the work 3 is a lubricant reservoir 6. From a grease cup 4 provided on the ground side of the work 3, a lubricant 7 such as grease is passed through an oil passage 5 by a grease gun through a lubricant path 5. The reservoir 6 is configured to be filled. The confirmation window 8 arranged on the top side of the work 3 is for confirming whether or not the lubricant reservoir 6 is fully filled with the lubricant 7. FIG. 6 shows a sectional view of the sliding shaft 1 in the lubricant reservoir 6.

[0003]

As the conventional reciprocating sliding bearing continues to reciprocate, the amount of lubricant in the lubricant pool gradually decreases. When the amount of the lubricant decreases, an unfilled space without lubricant is formed on the top side of the lubricant pool, and the lubricant does not reach the sliding shaft exposed in the unfilled space. If the operation of the reciprocating slide receiver is continued in this state, galling occurs on the top side of the sliding shaft, which causes damage to the bearing.

[0004] In order to prevent such running out of oil on the top side of the sliding shaft, it is necessary to always fill the lubricant reservoir with the lubricant, and in order to do so, add more lubricant than necessary. In many cases, the amount of oil is controlled to cause oil scattering around the reciprocating sliding bearing. Therefore, an object of the present invention is to provide a reciprocating sliding bearing that prevents running out of oil on the top side of a sliding shaft.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a reciprocating sliding bearing having a lubricant reservoir, in which an oil ring having a scraping action and a squeezing action is slid in the lubricant reservoir. A reciprocating sliding bearing characterized by being movably fastened to a driving shaft.

[0006] The oil ring used in the present invention is formed with a lubricant escape hole comprising a notch and / or a through hole and a slot.

[0007]

According to the present invention, in a reciprocating sliding bearing having a lubricant reservoir, when the reciprocating sliding bearing moves relatively to the oil ring and the sliding shaft, the reciprocating sliding bearing exists in the lubricant reservoir. The lubricant is raked up by the oil ring, and the space within the lubricant pool narrowed by the relative movement of the oil ring is filled with the lubricant, and then substantially most of the lubricant is removed from the lubricant escape hole and the slit. Is squeezed out into the other lubricant reservoir which is expanded by the relative movement of the oil ring. When the turning point of the relative reciprocating movement of the reciprocating sliding bearing has been reached, the substantial majority of the lubricant has been squeezed out. Therefore, the oil is supplied to the top side of the sliding shaft.

[0008] Since the tightening force of the oil ring is originally set to be weak, the oil that has been tightened to the sliding shaft until the lubricant is filled in the lubricant pool by scraping the oil ring is considered. The ring then squeezes out the full lubricant to the opposite side of the lubrication pool where there is room in space while sliding on the sliding shaft, and the relative movement of the reciprocating sliding bearing causes more oil to be released. There is no compression.

[0009]

Embodiment 1 FIGS. 1 and 2 show a reciprocating sliding bearing according to Embodiment 1. FIG. Reference numeral 21 denotes a sliding shaft, 22 denotes 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 sealed 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 and stores the lubricant. 26 are filled. A check window (not shown) is provided on the top side of the work 23 for checking whether or not the lubricant reservoir 26 is filled with the lubricant 27 fully.

A donut-shaped disk-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 as to be tightened. Loosely tightened to allow movement by force. 3 and 4 show examples of the oil ring 29 used in the present invention. These oil rings 2
A slit 30 is cut in the radial direction of the sliding shaft 9, and when fitted to the sliding shaft 21, the spring force acts on the inside to loosely tighten the sliding shaft 21. Further, these oil rings 29 are formed with a lubricant escape hole 31 such as a notch or a small hole penetrating through the thickness direction of the disk.
FIG. 3 shows an example in which the lubricant escape hole 31 is a notch, and FIG. 4 shows an example of a small hole.

The number and size of the lubricant escape holes 31 formed in the oil ring 29, their distribution position, and the like, and the tightening force of the oil ring are determined by the sliding speed of the sliding shaft 21, the type of the lubricant 27, and the lubrication. It is necessary to appropriately select and adjust the optimum one according to conditions such as the shape of the agent reservoir 26. For example,
Even if the amount of the lubricant 27 present in the lubricant reservoir 26 is small, in order to efficiently supply the lubricant 27 to the entire circumference of the sliding shaft 21, the size of the lubricant escape hole 31 is required.
It is better to make the ground side smaller and the ceiling side larger sequentially.

When the oil ring 29 is set on 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 the material of the oil ring, brass, plastic, or the like can be suitably used. 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 stored on the ground side in the lubricant pool 26 in the state of FIG. When the work 23 relatively moves rightward as shown in FIG. 2, the oil ring 29, which exerts a tightening force on the sliding shaft 21, stays at the same position together with the sliding shaft 21, and the ground shown in FIG. The lubricant 27 on the side is scraped off by an oil ring 29, and a narrowed lubricant pool 26 is formed.
Is filled with the lubricant 27.

Next, the filled lubricant 27 passes through the lubricant escape hole 31 and the slit 30, and is squeezed out to the right space of the enlarged lubricant reservoir 26. At the time when the lubricant 27 existing in the left space was substantially squeezed out, that is, when more than half of the total amount of the lubricant moved from the left space to the right space, the work 23 moves in the opposite direction to the previous, and the lubricant 2
7, scraping, filling, and squeezing are performed. 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. Lubricant pool 2
As long as there is a small amount of the lubricant 27 in 6, running out of oil does not occur on the entire circumference of the sliding shaft 21.

In the above description, the work 23 is mainly moved, but the work 23 is fixed,
Even when the sliding shaft 21 reciprocates, the effect of the reciprocating sliding bearing having the oil ring 29 in the present invention is the same. Further, the notch or small hole serving as the lubricant escape hole 31 is twisted in the thickness direction of the oil ring 29 so that the squeezed lubricant 27 proceeds so as to be applied to the entire circumference of the sliding shaft 21. Therefore, the effect of supplying the lubricant 27 increases.

[0015]

According to the present invention, as described above, the lubricant in the lubricant pool is raked up by the relative reciprocating movement of the sliding shaft or the work to fill the space of the lubricant pool. Since a substantial majority of the lubricant squeezed out and travels through the lubricant escape holes and slots into the space on the opposite side where there is room for space, the amount of lubricant present in the lubricant pool is reduced. Even if the amount is small, the lubricant is uniformly supplied to any position of the sliding shaft.
Therefore, the lubricant spreads over the entire circumference of the sliding shaft, and the top side does not run out of oil.

Further, even if the amount of the lubricant in the lubricant reservoir is greatly reduced, the lubricant can be supplied to the entire circumference of the sliding shaft, so that the lubrication of the lubricant can be easily managed. Since an excessive amount of lubricant is not supplied, the amount of lubricant is reduced, and the effect of preventing oil scattering caused by excessive use of lubricant is obtained.

[Brief description of the drawings]

FIG. 1 shows a reciprocating sliding bearing according to a first embodiment, showing a state before a workpiece is moved.

FIG. 2 shows a reciprocating sliding bearing according to the first embodiment, showing a state after a workpiece is moved.

FIG. 3 shows an example of an oil ring when a lubricant escape hole is a notch.

FIG. 4 shows an example of an oil ring when a lubricant escape hole is a small hole.

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]

 DESCRIPTION OF SYMBOLS 21 Sliding shaft 22 Bush 23 Work 25 Oil path 24 Gap 26 Lubricant pool 27 Lubricant 29 Oil ring 30 Slot 31 Lubricant escape hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A reciprocating sliding bearing having a lubricant reservoir, wherein an oil ring having a scraping action and a squeezing action is movably fastened to a sliding shaft in the lubricant reservoir. bearing. 2. A reciprocating sliding bearing according to claim 1, wherein said oil ring is formed with a lubricant escape hole comprising a notch and / or a through hole and a slot.