JPH06307442A - Device for supplying oil into direct driving mechanism part - Google Patents

Abstract

PURPOSE:To supply oil to the surface of a guide shaft by means of a member moved together with a direct driving ball bearing by forming, for a long time, the oil film on the surface of the guide shaft in a direct driving bearing mechanism which is formed in such type that the direct driving ball bearing is out-fit slidably to the guide shaft. CONSTITUTION:A space 21 opened toward an inner circumferential side is formed on a cover flame 2 which is out-fit slidably and detachably in relation to a guide shaft G, and a pad 3 having drug component such as lubricating component or rust resistance component is housed so as to be brought in contact with the surface of the guide shaft G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to oil supply to a linear motion mechanism section, and is an apparatus for supplying oil to a linear motion mechanism section comprising a combination of a guide shaft for linear drive and a linear motion bearing which forms a pair with the linear drive guide shaft. It is about.

[0002]

2. Description of the Related Art In machine tools such as milling plates and labor-saving machines, a bed (B) supporting or holding a work (W) is provided with a plurality of guide shafts (G) (see FIG. 1 and FIG. 2). A linear reciprocating mechanism (M) such as a feed screw device is interposed between the frame (G) and the bed (B) supporting the guide shafts (G) (G). And this linear motion reciprocating mechanism (M)
Is operated to reciprocate the bed (B).

Recently, in order to make this reciprocating motion smooth, linear motion rolling bearings (1) and (1) are adopted for the support portion of the bed (B) by the guide shafts (G) (G). This linear motion rolling bearing (1)
Is mounted so that it can be slidably fitted onto the guide shaft (G), and a large number of balls contained therein roll and move between the guide shaft (G) and the ball passage in the bearing body. Circulate through. Therefore, the movement resistance of the linear motion rolling bearing (1) is significantly reduced, and the movement resistance of the bed (B) supported by the plurality of linear motion rolling bearings (1) (1) is significantly reduced.

However, in the linear motion mechanism using the linear motion rolling bearings (1) (1), the guide shaft (G) cannot be used for a long period of time.
There are problems that the oil film on the surface disappears, the guide shaft (G) rusts, and the smoothness of movement of the balls in the linear motion rolling bearing (1) is impaired. Since the linear motion rolling bearing (1) is filled with a lubricant such as grease, this lubricant is applied from the linear motion rolling bearing (1) to the surface of the guide shaft (G). Since the capacity is small, the linear motion rolling bearing (1) becomes out of grease in a relatively short period of time.
Further, since it is mainly used for lubrication in the linear motion rolling bearing (1), the lubricant is not supplied to the guide shaft (G). Therefore, in order to keep the oil film always formed on the surface of the guide shaft (G), it is necessary to frequently replenish the grease etc. from the grease nipple etc. equipped in the linear motion rolling bearing (1). .

However, the location of the linear motion rolling bearing (1) is often set in a narrow place or a place where it is difficult to replenish grease, and the lubricating component on the surface of the guide shaft (G) disappears. cheap. As a result, the surface of the guide shaft (G) is rusted and the smooth operation of the balls in the linear motion rolling bearing (1) is impaired. The present invention has been made in view of these points,
In order to form an oil film on the surface of the guide shaft (G) for a long period of time in a linear motion bearing mechanism of the type in which the linear motion rolling bearing (1) is slidably fitted onto the guide shaft (G), The object is to enable lubrication of the surface of the guide shaft (G) by means of a member that moves together with the rolling bearing (1).

[0006]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is to "internally cover a cover frame (2) slidably and detachably fitted to a guide shaft (G). An open space (21) is formed, and a pad (3) containing a chemical component such as a lubricating component or an anticorrosive component is housed in this space (21) and the pad (3) is inserted into the guide shaft (G). I made it contact with the surface of.

[0007]

The above technical means operates as follows. Normal,
Bed (B) has guide shaft (G) through linear motion rolling bearing (1)
When supported by, at least a pair of linear motion rolling bearings (1) (1) are usually mounted on one guide shaft (G). Therefore, when the lubrication device having the above configuration is externally fitted between the linear motion rolling bearings (1) and (1), the pad (3) housed in the space (21) and the guide shaft (G) come into contact with each other, The cover frame (2) is moved along with the movement of the bed (B), that is, the movement of the linear motion rolling bearing (1). Therefore, the cover frame
The drug component in the pad (3) housed in (2) is applied to the surface of the guide shaft (G). In some cases, if the lubrication device with the above configuration is attached and fixed to the linear motion rolling bearing (1),
This reliably moves together with the rolling bearing (1).

Since the cover frame (2) is detachably fitted to the guide shaft (G), the pad frame
When the oil content in (3) is exhausted, remove it and replace it entirely, or replenish the pad (3) with drug components.

[0009]

[Effect] Since the cover frame (2) is simply configured to accommodate the pad (3) impregnated with the oily component, the entire structure can be inexpensively formed by injection molding of synthetic resin or the like. Further, since the drug component impregnated in the pad (3) is constantly supplied to the surface of the guide shaft (G), the oil film on the surface of the guide shaft (G) does not easily disappear. Furthermore, when the impregnated drug component in the pad (3) disappears, it is simply removed and replenished with the drug component or replaced with a new lubrication device. Easy to do.

Therefore, in maintenance of a labor-saving machine or the like, it is easy to take measures to maintain the surface of the guide shaft (G) in the oil film-forming state at all times.

[0011]

Embodiments of the present invention described above will now be described in detail with reference to the drawings. The first embodiment shown in FIGS. 3 to 5 is such that an oil supply device (P) including a cover frame (2) and a pad (3) can be mounted on a guide shaft (G) having a circular cross section.
The cover frame (2) is composed of a pair of frame halves (2a) (2a) and the pad (3) is composed of a pair of pad halves (3a) (3a).
And the oil supply device (P) is constituted by the oil supply device halves (P ₁ ) (P ₁ ).

For this reason, the frame half (2a) constituting each oil supply device half (P ₁ ) is formed in a semicircular shape as a whole, and the inner circumference radius thereof is slightly smaller than the radius of the guide shaft (G). The two halves have the same configuration.
The cross-sectional shape of the frame half body (2a) is formed in a U-shaped cross-section that opens to the inner peripheral side, and the pad half body (3a) that is a rectangular cross section that is just accommodated in this cross section and has a semicircular shape as a whole is formed. It is housed in each frame half (2a).

The pad half (3a) is one of the pads (3) whose rectangular cross section is continuous in a donut shape divided into two by a diameter line, and the inner circumference radius thereof is the diameter of the guide shaft (G). It is set to be slightly smaller than, and is made of a material such as sponge, non-woven fabric, felt, etc., which has a high impregnation property of the drug component, and is impregnated with a predetermined amount of lubricating oil or the like. A pair of protrusions (22) and (22) project from one end of the frame half body (2a) in the circumferential direction, and an engaging hole (23) is formed at the other end at a position symmetrical to the protrusion. ) (23) is formed. The forming direction of the engaging hole (23) is set parallel to the protrusion (22).

As shown in FIGS. 4 and 5, the refueling device (P) of the above-described embodiment is arranged so that the pair of refueling device halves (P ₁ ) (P ₁ ) face each other and the bed (B) is directly moved. It is used by being fitted onto the guide shaft (G) between the rolling bearings (1) (1). When installing this external fitting,
The lubricator halves (P ₁ ) (P ₁ ) face each other and are externally fitted to the guide shaft (G), and the protrusions (22) of the frame half (2a) engage with the engaging holes of the opposite frame half (2a). Insert each into (23). Incidentally, the protrusion
The fitting relationship between the (22) and the engagement hole (23) is maintained by the forced press-fitting and the projection is generated by forcibly separating.
(22) is pulled out from the engagement hole (23), and the protrusion (2
2) When the (22) and (22) are fitted into the engagement holes (23) and (23) and connected, the frame halves (2a) and (2a) are connected in an annular shape to cover the frame.
(2) is configured, and the oil supply device (P) is externally fitted and attached to the guide shaft (G). In this state, the pad halves (3a) and (3a) housed in each frame half (2a) are also connected annularly to form a pad (3), which is in close contact with the surface of the guide shaft (G). .

Therefore, when the bed (B) moves,
Since the rolling bearing (1) (1) moves, the reciprocating movement of this
Consists of cover frame (2) and pad (3)
The lubricator (P) is moved back and forth, and the pad (3) moves through the guide shaft.
The surface of (G) will be lubricated. And the prescribed usage
The drug component in the pad (3) disappeared after the usage period
In this state, the projection (22) and the engagement hole (23) are fitted and engaged.
And refueling device half (P₁) (P ₁) Is separated from the
The device (P) can be removed from the guide shaft (G). new
When replacing the oil supply device (P) with a new one, follow the same procedure as above.
Reinstall the lubricator (P) between the linear motion rolling bearings (1), (1).
In some cases, the pad (3) may be supplemented with chemical components such as lubricating oil.
Supply and refit.

Incidentally, FIG. 4 shows a mode in which the oil supply device halves (P ₁ ) and (P ₁ ) are vertically combined, but actually, they are combined left and right as shown in FIG. As a result, it is easy to assemble and disassemble the oil supply device halves (P ₁ ) (P ₁ ) even below the bed (B). [Embodiment 2] In this embodiment, the rail (R) having a substantially rectangular cross section as shown in FIGS. 6 and 7 can be used.
Usually, the rail (R) is composed of a guide rail portion (R ₁ ) that functions as a guide shaft having an inverted trapezoidal cross section, and a base functional portion (R ₂ ) that is continuously provided below this guide rail portion. (R ₂ ) is placed on the base of the equipment, etc., and the entire rail (R) is fixed. Then, the linear motion rolling bearing (1) (1) is mounted in such a manner that the linear motion rolling bearing (1) (1) is fitted onto the guide rail portion (R ₁ ), and the linear motion rolling bearing (1) (1)
The bed (B) is attached to the upper surface of the.

Balls (11) and (11) accommodated in the linear motion rolling bearing (1) are provided at both upper ends of the cross section of the guide rail portion (R ₁ ).
Ball grooves (L) (L) that the groups are in contact with each other are formed in the axial direction. In order to apply this rail (R), in this example,
As shown in FIG. 8, the cover frame (2) consisting of the frame halves (2a) and (2a) of the oil supply device (P) has a structure in which an open portion is partially provided, and the cover frame (2) is the guide rail. It has a shape that fits over the portion (R ₁ ).

The frame half (2a) is generally L
The outer peripheral wall is a shape bent in a letter shape, and the outer peripheral wall has a horizontal plate portion (24) having protrusions (22) and engagement holes (23) formed on both sides of one end, and a vertical plate hanging from the other end portion of the horizontal plate portion (24). It consists of a wall part (25), an inclined wall part (26) that inclines obliquely inward from the lower end of the wall part, and a pair of mutually symmetrical side plate parts (27) and (27) that are connected to the front and rear sides of the wall part (25). , The inner peripheral side of this side plate part (27) is the guide rail part (R ₁ )
Is set to be slightly larger than the shape obtained by dividing the cross-sectional contour of the vertical section into two.

The space formed by these respective parts becomes a space (21) which is open to the inner peripheral side, and the half L-shaped pad (3a) as a whole is accommodated therein, and the half of the oil supply device (P ₁ )
Is configured. The cross-sectional inner peripheral shape of this pad half (3a) corresponds to the shape of the guide rail section (R ₁ ) which is divided into two longitudinal sections of the cross section, and this pad half (3) including the ball grooves (L) (L) 3a)
The inner peripheral portion of is shaped so as to be in close contact with the upper surface of the guide rail portion (R ₁ ) and the side portions in the vicinity thereof.

A pair of oil supply device halves configured as described above
When (P ₁ ) and (P ₁ ) face each other and are externally fitted to the guide rail portion (R ₁ ), the protrusions (22) and (22) are press-fitted into the engagement holes (23) and (23). As shown in FIG. 9, the guide rail (R ₁ ) is provided with an oil supply device.
(P) will be fitted externally. When the mounting position of the lubricator (P) is set in the same manner as in the first embodiment, the chemical component impregnated in the pad (3) built in the lubricator (P) moves the linear motion rolling bearing (1). Along with this, it will be applied to the surface of the guide rail portion (R ₁ ).

In each of the above-mentioned embodiments, the oil supply device (P) is mounted between the pair of linear motion rolling bearings (1) (1), but this is attached to the linear motion rolling bearing (1). You may attach so that it may be fixed. For this purpose, for example, as shown by the imaginary line in FIG. 8, a method of equipping one side of the oil supply device (P) with a fixing means such as a double-sided tape (T), or a direct movement of the oil supply device (P) It is possible to employ a system in which engaging means for engaging with the rolling bearing (1) is provided.

The third embodiment shown in FIG. 10 is an oil supply device (P).
The is obtained by allowing integrally mounted across the linear rolling bearing (1), each of the oil supply device half (P ₁₎ is the second embodiment
A pair of frame halves (2a) (2a) having the same configuration as the above are integrally connected by a connecting bar (28) at a constant interval. A pad half (3a) similar to that of Example 2 is housed.

A pair of oil supply device halves configured as described above
(P₁) (P₁) With the linear motion rolling bearing (1) sandwiched between them.
Drail part (R₁), The oil supply device
(P) is installed with the linear motion rolling bearing (1) in between,
Position (P) reliably moves with linear motion rolling bearing (1)
Will be things. As a modified example of the third embodiment, as shown in FIG.
As shown in 2, each refueling device half (P ₁) Engaging hook (28
a) and the engaged hook (28b)
good. In this case, the engaging hook (28a) and the engaged hook
When (28b) and (28b) are engaged with each other, as shown in
The oil device (P) is₁) Is installed. In addition,
In this case, the protrusions (22) (22) and the engaging holes (23) (23) are unnecessary.
However, the protrusions (22) (22) and the engagement holes (23) (23) may be used together.
Yes.

In any of the above embodiments, the bed
From the left and right of the guide shaft (G) or rail (R) without removing (B) from the equipment, the lubricator half (P ₁ ) (P ₁ )
To removably mount the lubricator half (P ₁ ) (P
It goes without saying that the thickness of the upper part of ₁ ) is set smaller than the gap between the guide shaft (G) and the bed (B).

[Brief description of drawings]

FIG. 1 is an explanatory view of a linear motion bearing mechanism.

FIG. 2 is a sectional view taken along line XX.

FIG. 3 is an exploded view of the first embodiment of the present invention.

FIG. 4 is an explanatory diagram of its usage state.

FIG. 5 is a cross-sectional view of a main part of the first embodiment.

FIG. 6 is an explanatory diagram of a linear motion bearing mechanism to which the second embodiment is applied.

FIG. 7 is a sectional view of the main part of the linear motion bearing mechanism.

FIG. 8 is an exploded view of the second embodiment.

FIG. 9 is a cross-sectional view of the main part of the usage state of the device.

FIG. 10 is a perspective view of a main part of the third embodiment.

FIG. 11 is a plan view of the usage state of this.

FIG. 12 is a plan view of a usage state of another embodiment.

[Explanation of symbols]

 (G) ・ ・ ・ Guide shaft (1) ・ ・ ・ Linear motion rolling bearing (2) ・ ・ ・ Cover frame (21) ・ ・ ・ Space (3) ・ ・ ・ Pad (2a) ・ ・ ・ Half frame ( 3a) ... Pad half

Claims (2)

[Claims] 1. A lubrication device for a linear motion mechanism of a type in which a linear motion rolling bearing (1) is slidably fitted onto a guide shaft (G) so that the linear motion rolling bearing (1) is slidable with respect to the guide shaft (G). In addition, a space (21) that opens to the inner peripheral side is formed in the cover frame (2) that is detachably fitted, and a pad (3) that holds a chemical component such as a lubricating component or an anticorrosive component is formed in this space (21). ) Accommodates this pad (3)
A device for supplying oil to the linear motion mechanism section, in which the oil is brought into contact with the surface of the guide shaft (G). 2. The cover frame (2) is composed of a pair of frame halves (2a) (2a) capable of contacting and separating in the direction perpendicular to the axis, and the pad (3) is provided in the cover frame.
The straight pad according to claim 1, comprising a pair of pad halves (3a) (3a) divided similarly to (2), wherein the frame halves (2a) (2a) are detachably engaged with each other. Lubrication device for the dynamic mechanism.