JP3686598B2 - Solid lubricant and solid lubricant application device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a lubricant applied to the peripheral surface of a rotating shaft or a sliding shaft, and relates to a solid lubricant formed into a predetermined shape and a solid lubricant application device for applying the solid lubricant. is there.
[0002]
[Prior art]
Solid lubricants have properties such as low viscosity compared to liquid lubricants, so that they can not only sag but also have a low risk of dust being attached to the solid lubricants and damaging machinery and equipment. Therefore, in recent years, it has been used as a lubricant for various machine elements. The development of the solid lubricant itself has been disclosed in, for example, published publications such as JP-A 53-122059, JP-A 62-196351, and JP-A 10-95990. Are disclosed in, for example, Japanese Utility Model Publication No. 52-53914, Japanese Patent Publication No. 52-5137, and Japanese Patent Application Laid-Open No. 2000-142402.
[0003]
[Problems to be solved by the invention]
However, many of the developments related to the solid lubricant described above relate to components for improving the lubrication characteristics, and the solid lubricant that can be effectively applied to the rotating shaft and the sliding shaft and the solid lubricant. A solid lubricant application device for applying the agent to the rotating shaft and the sliding shaft has not been developed. In the solid lubricant application device disclosed in the Japanese Utility Model Publication No. 52-53914, the solid lubricant is applied to the sliding surface, but the number of parts is extremely large and the cost is high. I don't get it.
[0004]
Therefore, the present invention has been proposed in order to solve the problems of the above-described conventional solid lubricant and solid lubricant application device, and is effective for the rotating shaft and the sliding shaft. It is an object of the present invention to provide a solid lubricant and a solid lubricant coating device capable of coating the solid lubricant.
[0005]
[Means for Solving the Problems]
The present invention has been proposed in order to achieve the above object, and the first invention (the invention according to claim 1) is spaced apart in the direction around the axis of the rotating shaft or the sliding shaft. side by side are arranged, gradually three or more of the solid lubricant itself to wear by sliding contact with the circumferential surface of the pivot shaft or sliding shaft, on the inner surface of each of the solid lubricant itself, the A ring shape that has a sliding contact surface that is in sliding contact with the circumferential surface of the rotating shaft or the sliding contact shaft, and that urges each solid lubricant in the axial direction of the rotating shaft or the sliding contact shaft on the outer surface. A mounting portion to which the elastic material is mounted is formed.
[0006]
The solid lubricant constituting the first invention includes soft metals such as gold, silver, copper, zinc and lead, metal oxides such as PbO, sulfides such as molybdenum disulfide and tungsten disulfide, and selenium telluride. Conventionally produced or proposed materials such as halogen compounds, fluorides, nitrides, fine ceramic powders, graphite, and organic compounds can be arbitrarily used. In the present invention, an appropriate amount of wax or paraffin is added to these materials and dissolved, and then each solid lubricant is molded by a molding die or the like. The plurality of solid lubricants formed in this way are arranged and arranged at intervals in the direction around the axis of the rotating shaft or the sliding shaft, and the number thereof is at least 3 or more. It is necessary to be determined appropriately depending on the size of the rotating shaft and the sliding shaft.
[0007]
It should be noted that the rotating shaft on which the plurality of solid lubricants are disposed is not limited to whether or not a screw is formed on the circumferential surface, and the sliding shaft is also recessed on the circumferential surface such as a rail. It does not matter whether or not the stripes or ridges are formed, and includes a guide shaft. That is, the sliding contact surface constituting the present invention has a shape corresponding to the shape of the peripheral surface of the rotating shaft (for example, an arcuate curved surface) when a screw is not formed on the rotating shaft. When a screw is formed, a screw to be screwed to the screw is formed (the invention according to claim 2). In addition, when the slide shaft is not formed with a groove or protrusion, the shape corresponding to the shape of the peripheral surface of the slide shaft (for example, an arcuate curved surface or a flat surface) is formed. When the strip is formed, a convex strip corresponding to the concave strip or a concave strip corresponding to the convex strip is formed.
[0008]
In the present invention, a ring-shaped elastic material that urges each solid lubricant alone in the axial direction of the rotating shaft or the sliding shaft is attached to the outer surface of each solid lubricant alone. The mounting part to be formed needs to be formed. The ring-shaped elastic material may be, for example, a coil spring or rubber, and in consideration of the mounting property to the solid lubricant, one having one end and the other end removably connected. It is preferable to use it. Therefore, the mounting portion constituting the present invention may be, for example, a concave groove or a convex portion to which the elastic material is locked as long as it can mount at least a ring-shaped elastic material.
[0009]
Therefore, according to the solid lubricant according to the first invention, not only can the lubricant be applied to the rotating shaft or the sliding shaft, but also the rotating shaft and the sliding shaft are used as elements. It can be easily incorporated into a machine tool.
[0010]
A third invention (invention according to claim 3) relates to a solid lubricant application device, which is fixed to the outside of a rotating shaft or a sliding shaft, and is described in claim 1 or 2 inside. 3. One and other case halves accommodating solid lubricant, the solid lubricant according to claim 1 or 2 accommodated in said one and other case halves, and mounting formed on said solid lubricant and a resilient member mounted on part, on at least one of the one and the other of the case halves, the sliding of the pivoting or sliding shaft in shaft above times, the solid lubricant times A restricting portion that restricts movement or sliding is formed, or a contact portion that contacts a solid lubricant that slides along the sliding shaft is formed. .
[0011]
According to the third aspect of the invention, the solid lubricant rotates in at least one of the case half and the other case half by the rotation of the rotation shaft or the sliding of the slide shaft. Or a restricting portion that restricts sliding, or an abutting portion that abuts against the one and other case halves that slide along the sliding axis. The solid lubricant rotates together by the rotation of the moving shaft, or the solid lubricant moves together by sliding of the sliding shaft, or one and the other case halves slide along the sliding shaft. When moving, it is possible to effectively prevent the solid lubricant from remaining without sliding. That is, when a screw is engraved on the peripheral surface of the rotating shaft and the regulating portion is not formed in the solid lubricant applying device, the solid lubricant is removed by rotation of the rotating shaft. It will move in the length direction of a rotating shaft, and it will become impossible to apply | coat a solid lubricant to the surrounding surface of this rotating shaft. This is the same even when a screw is not screwed on the rotating shaft. When this restricting portion is not formed, the solid lubricant rotates together with the rotating shaft at the same location. As a result, the solid lubricant cannot be applied to the peripheral surface of the rotating shaft. The restricting portion or the contact portion constituting the present invention can prevent such a situation and reliably apply the solid lubricant to the rotating shaft or the sliding shaft.
[0012]
According to a fourth invention (invention of claim 4), in the third invention, the space from the tip of the restricting portion or the contact portion to the peripheral surface of the rotating shaft or the sliding shaft is worn. It is characterized by being an insertion space through which the solid lubricant is inserted.
[0013]
According to the fourth aspect of the present invention, when the solid lubricant that is in sliding contact with the circumferential surface of the rotating shaft or the sliding shaft is gradually worn out by the elastic force of the elastic material, it will hit the restricting portion or the contact portion until then. The solid lubricant that is in contact is not regulated by the regulating part or does not come into contact with the abutting part, so that it is exposed to the outside from one and the other case halves that move by the pivoting of the pivot shaft, Or it will remain without sliding with a sliding shaft, and it will not wear any more. Therefore, according to the fourth aspect of the present invention, it is possible to easily confirm the replacement time of the solid lubricant.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the solid lubricant accommodated in each solid lubricant applicator will be described while describing the solid lubricant applicator according to each embodiment of the present invention. First, the solid lubricant coating device according to the first embodiment will be described in detail with reference to the drawings.
[0015]
As shown in FIG. 1, the solid lubricant application device 1 according to the first embodiment is arranged in an elevating device 2, and the elevating device 2 is a circuit installed upright in the center. A moving shaft 3, guide shafts 4 and 5 erected on the left and right sides of the rotating shaft 3 and parallel to the rotating shaft 3, and a motor 6 that rotates the rotating shaft 3 are provided. ing. The rotating shaft 3 is formed by screwing a screw 3a on a peripheral surface, and both upper and lower ends are rotatably supported by bearings 7 and 8, respectively. A first gear 9 is fixed to a drive shaft 6a of the motor 6 which is a driving source of the rotating shaft 2, and a first middle portion of the rotating shaft 3 is disposed in the first middle portion. A second gear 10 meshing with the gear 9 is fixed.
[0016]
And in the middle part of this rotating shaft 3, the raising / lowering plate 11 and the raising / lowering block fixed to the upper surface of this raising / lowering plate 11, the ball screw 12 (refer FIG. 2) being fixed inside, and the external shape was shape | molded in the column shape. The solid lubricant application device 1 according to this embodiment is fixed to the upper surface of the elevating block 14. In addition, four bolt holes 14a into which bolts for fixing one or the other case half to be described later to the lifting block 14 are screwed are formed on the upper surface of the lifting block 14. Further, cylindrical members 15 and 16 into which the left and right guide shafts 4 and 5 are inserted are fixed to the left and right sides of the elevating plate 11. The elevating block 14 is fixed to the upper surface of the elevating plate 11 with bolts 17.
[0017]
As shown in FIG. 3, the solid lubricant application device 1 is housed in one case half 18, the other case half 19, and the one and other case halves 18 and 19. The solid lubricant 20, the first and second elastic members 21 and 22 that urge the inner surface of the solid lubricant 20 to press against the peripheral surface of the rotating shaft 3, and the solid lubricant 20. And a regulating member 23 that regulates co-rotation. The one and the other case halves 18 and 19 are respectively cylindrical portions 18a and 19a formed in a semicylindrical shape, and top plate portions 18b and 19b formed at the upper ends of the cylindrical portions 18a and 19a. Arc-shaped notches 18c and 19c thicker than the diameter of the rotary shaft 3 are formed inside the top plate portions 18b and 19b. That is, in the state in which the one and the other case halves 18 and 19 are integrated, a cylindrical tubular portion (reference numeral is omitted) and a circular shape through which the rotating shaft 3 is inserted at the center. And a top plate portion (reference numerals are omitted) in which insertion holes (reference numerals are omitted) are formed.
[0018]
In addition, the space from the inner peripheral surface of the top plate portions 18b and 19b constituting the one and other case halves 18 and 19 to the peripheral surface of the rotating shaft 3 is worn solid lubricant 20 as will be described later. Is a space inserted through the one and the other case halves 18 and 19 to the outside. Further, the top plate portions 18b and 19b constituting the one and other case halves 18 and 19 have bolts for fixing the one or other case halves 18 and 19 to the upper surface of the elevating block 14. Two bolt insertion holes 18d, 18d, 19d, 19d through which 25, 25, 26, 26 are inserted are formed. Further, a screw hole 18e into which the restriction member 23 is screwed is formed in the cylindrical portion 18a constituting the one case half 18. The restricting member 23 screwed into the screw hole 18e is a restricting portion constituting the present invention. In the present embodiment, as shown in FIGS. Is a single solid lubricant, which will be described later, and is inserted between individual solid lubricants arranged side by side. In addition, the space from the front-end | tip of this control member 23 to the surrounding surface of the rotating shaft 3 is the insertion space which comprises this invention.
[0019]
Further, in the present embodiment, the solid lubricant 20 is composed of a total of four solid lubricants 28 as shown in FIGS. 3 and 4, and as shown in FIG. Screws 28a corresponding to the screws 3a threaded on the peripheral surface of the rotating shaft 3 are formed on the inner peripheral surfaces of the four solid lubricant single bodies 28, respectively, and two concave grooves 28b are respectively formed on the outer peripheral surface. , 28c are formed. In addition, the first elastic material 21 and the second elastic material 22 are mounted in the concave grooves 28b and 28c, respectively, and the elastic force of the first and second elastic materials 21 and 22 makes these 4 Two solid lubricant single bodies 28 are in pressure contact with the peripheral surface of the rotating shaft 3. The first and second elastic members 21 and 22 are made of coil springs in the present embodiment, and locking portions 21a, 21b, 22a, and 22b are formed at both ends, respectively. These locking portions 21a, 21b, 22a, and 22b are formed into a ring shape by locking each other.
[0020]
Therefore, in the lifting device 2 described above, when the motor 6 constituting the lifting device 2 is driven and the rotation shaft 3 is rotated, the lifting block 14 having the ball screw 12 fixed therein has the left and right guide shafts 4. .5, the solid lubricant application device 1 is also lifted and lowered as the lifting block 14 is lifted and lowered. At this time, the inner peripheral surface of the four solid lubricant single bodies 28 (the solid lubricant 20 comprising the solid lubricant 20) housed in the one and other case halves 18 and 19 of the solid lubricant application device 1 is a rotating shaft. 3 and is pressed against the peripheral surface of the rotating shaft 3 by the elastic force of the first and second elastic members 21 and 22, and the solid lubricant 20 is made up of a regulating member. 23, the co-rotation is restricted, so that the solid lubricant 20 is not broken in the one and the other case halves 18 and 19, and the circumferential surface of the rotary shaft 3 is solid lubricated. The agent 20 is reliably applied, and the durability of the ball screw 12 can be improved.
[0021]
Then, the lifting / lowering device 2 is driven for a long time or a long time, and the solid lubricant 20 stored in the solid lubricant application device 1 is worn, and the peripheral surface of the rotating shaft 3 starts from the tip of the regulating member 23. When the thickness of the solid lubricant 20 becomes shorter than the length of the up-and-down block 14, the solid lubricant 20 is released from the co-rotation restriction by the restriction member 23, and is moved up and down by the turning shaft 3. In addition, it does not descend with the other case halves 18 and 19 and is left on the rotating shaft 3 as it is through the space from the inner peripheral surface of the top plate portions 18 b and 19 b to the peripheral surface of the rotating shaft 3. . That is, according to the solid lubricant application device 1, when the solid lubricant 20 housed therein is worn and needs to be replaced, it is automatically taken out (exposed) through the space. Therefore, it becomes possible to replenish a new solid lubricant in a stage before it wears out and disappears.
[0022]
In particular, in the above-described embodiment, the restricting portion constituting the present invention is the restricting member 23 that can be screwed and unscrewed with respect to the screw hole 18 e formed in one case half 18, and the solid lubricant 20 Since the range in which the joint rotation can be regulated can be adjusted as appropriate by the screwing or screwing operation of the regulating member 23, the component (or hardness) of the solid lubricant 20 and the rotation speed of the rotating shaft 3 are adjusted. Or the replacement | exchange time of this solid lubricant 20 can be changed with the raising / lowering stroke length of the raising / lowering block 14 with which the ball screw 12 was fixed inside.
[0023]
In the above embodiment, the solid lubricant according to the present invention (or constituting the present invention) is composed of the four solid lubricant simplexes 28, but the number of solid lubricants constituting the present invention is as follows : The number may be three, or may be five or more. In the first embodiment, the restricting member 23 made of the bolt is illustrated as the restricting portion constituting the present invention. However, the restricting member 23 is not necessarily required to be configured as described above. , 19 may be provided with convex portions or projecting pieces (not shown) as restricting portions constituting the present invention.
[0024]
Next, the solid lubricant coating device 30 according to the second embodiment of the present invention will be described in detail. As shown in FIGS. 5 and 6, the solid lubricant application device 30 according to the second embodiment is fixed to a linear motion device 31, and slides constituting the linear motion device 31. A solid lubricant is applied to the shaft 32. The linear motion device 31 includes a sliding shaft 32 whose both ends are fixed to fixing brackets 33 and 34, and a moving block 35 that is attached to the sliding shaft 32 and moves while being guided by the sliding shaft 32. Is. The sliding shaft 32 is not formed by screwing a screw 3a on the peripheral surface like the rotating shaft 3 described in the first embodiment. Further, the sliding block 35 has a built-in drive mechanism (not shown), and is configured to move in the left-right direction in FIG. 5 by driving the drive mechanism.
[0025]
A moving table 38 is fixed to the upper surface of the moving block 35 via bolts 36 and 37. The length of the moving table 38 in the moving direction is formed to be longer than the length of the moving block 35 in the moving direction, and the lower surface on one end side and the lower surface on the other end side are provided with the present invention. The solid lubricant application devices 30 and 30 are fixed by bolts 39, respectively. As shown in FIG. 7, the solid lubricant application device 30 includes one case half 40, the other case half 41, and a solid housed in the one and other case halves 40 and 41. A lubricant 42 and an elastic material 43 that presses the solid lubricant 42 against the peripheral surface of the sliding shaft 32 are configured.
[0026]
The one and the other case halves 40 and 41 are respectively formed with arcuate storage portions 40a and 41a on the front of a rectangular metal block, and both sides of the arcuate storage portions 40a and 41a. Arc-like standing portions 40b, 41b and 41c are formed in the upper part. Further, screw holes 40d and 41d into which the bolts 39 are screwed are formed on the upper surfaces of the one and the other case halves 41, respectively. When the one and the other case halves 40 and 41 are integrated as shown in FIG. 6, they are thicker than the diameter of the sliding shaft 32 by the storage portions 40a and 41a. In addition, a solid lubricant 42, which will be described later, forms a space that is thinner than the outer diameter when the solid lubricant 42 is mounted on the peripheral surface of the slide shaft 32, and the upright portions 40b, 41b, 41c provide a solid lubricant. A space having an outer diameter smaller than the outer diameter of 42 is formed. That is, the inner side surfaces of the upright portions 40b, 41b, and 41c are the contact portions that the side surfaces of the stored solid lubricant 42 come into contact with, and constitute the present invention. Moreover, the space from the end surface of these standing parts 41b, 41b, 41c to the peripheral surface of the sliding shaft 32 is a space through which the worn solid lubricant 42 is inserted, as will be described later, and the insertion constituting the present invention. It is space.
[0027]
The solid lubricant 42 is composed of a total of four solid lubricants 44, and the inner peripheral surface of these solid lubricants 44 has an arc shape corresponding to the curvature of the peripheral surface of the sliding shaft 32. A curved surface 44a is formed, the outer peripheral surface is formed in an arc shape, and a concave groove 44b in which the elastic material 43 is mounted is formed in the center. The elastic material 43 is formed of a coil spring, similar to the first and second elastic materials 21 and 22 described in the first embodiment, and is provided with locking portions 43a at both ends. , 43b are formed, and these locking portions 43a, 43b are locked to each other to form a ring shape.
[0028]
Therefore, when moving along the sliding shaft 32 by driving of a driving mechanism (not shown) that incorporates the moving block 35 that constitutes the linear motion device 31 described above, it is housed in the one and the other case halves 40 and 41. The solid lubricant 42 in which the inner peripheral surface of each solid lubricant single body 44 is pressure-contacted by the elastic force of the elastic material 43 is formed by the upright portions 40b, 41b, 41c constituting the one and other case halves 40, 41. Move while being pushed by either. Therefore, by the operation of the linear motion device 31, the solid lubricant is applied to the peripheral surface of the sliding shaft 32, and thereby the frictional resistance of each member such as a ball bearing built in the moving block 35 is reduced.
[0029]
Then, as a result of the moving block 35 being driven for a long time or a long time, the solid lubricant 42 is gradually worn out from the inner peripheral surface side, and the thickness of the solid lubricant 42 is made upright part 40b. , 41b, 41c, when the length from the end surface to the peripheral surface of the sliding shaft 32 is less than that, the contact state between any of the raised portions 40b, 41b, 41c and the solid lubricant 42 is Canceled. As a result, the solid lubricant 42 that has been sliding along the sliding shaft 32 together with the moving block 35 is exposed to the outside from the inside of the moving one and other case halves 40, 41, and the sliding shaft 32.
[0030]
Therefore, even in the case of the solid lubricant application device 30 according to the second embodiment, the periphery of the slide shaft 32 is the same as the solid lubricant application device 1 according to the first embodiment. In addition to being able to effectively apply the solid lubricant to the surface, when the solid lubricant 42 contained in the surface is worn and needs to be replaced, it automatically passes through the insertion space to the outside. Since it is taken out (exposed), it becomes possible to replenish a new solid lubricant in a stage before it is worn out and disappears.
[0031]
In the second embodiment, an example is described in which the solid lubricant application device 30 in which the solid lubricant 42 is accommodated slides with respect to the fixed slide shaft 32. However, the basic configuration of the present invention does not change at all even if the sliding shaft slides relative to the fixed solid lubricant application device.
[0039]
【The invention's effect】
As is clear from the description of each embodiment of the present invention described above, according to the present invention (the invention described in claim 1 and the invention described in claim 2), lubrication is performed with respect to the rotating shaft or the sliding shaft. In addition to being able to apply an agent, it can be easily incorporated into a machine tool having the rotation shaft and sliding shaft as an element.
[0040]
In the third invention (invention of claim 3), at least one of the case half and the other case half is rotated by the rotation of the rotation shaft or the sliding of the slide shaft. A restricting portion that restricts rotation or sliding of the solid lubricant is formed, or an abutting portion that abuts the one and the other case halves sliding along the sliding shaft is formed. Therefore, the solid lubricant rotates together by the rotation of the rotation shaft, or the solid lubricant moves together by the sliding of the slide shaft, or the one and the other case halves are moved together. When sliding along the sliding axis, it is possible to effectively prevent the solid lubricant from remaining without sliding.
[0041]
Further, according to the fourth invention (the invention described in claim 4), when the solid lubricant slidingly contacting the peripheral surface of the rotating shaft or the sliding shaft is gradually worn by the elastic force of the elastic material, The solid lubricant that has been in contact with the restricting portion or the contact portion is not restricted by the restricting portion or does not come into contact with the contact portion. It will be exposed outside from the case half or left without sliding with the sliding shaft and will not wear further. Therefore, according to the present invention, it is possible to easily confirm the replacement time of the solid lubricant.
[Brief description of the drawings]
FIG. 1 is a front view showing an elevating device to which a solid lubricant application device according to a first embodiment is fixed.
FIG. 2 is a cross-sectional view of a solid lubricant application device.
FIG. 3 is an exploded perspective view showing one and other case halves constituting the solid lubricant applying device in an exploded manner.
FIG. 4 is an exploded perspective view showing a solid lubricant and an elastic material in an exploded manner.
FIG. 5 is a side view of a linear motion device to which a solid lubricant application device according to a second embodiment is fixed.
6 is a plan view of the linear motion device shown in FIG. 5. FIG.
FIG. 7 is an exploded perspective view of a second solid lubricant application device.
FIG. 8 is a side view of a linear motion device to which a solid lubricant application device according to a third embodiment is fixed.
9 is a plan view of the linear motion device shown in FIG. 8. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Solid lubricant application apparatus 3 Rotating shaft 18 One case half 19 Other case half 20 Solid lubricant 21 1st elastic material 22 2nd elastic material 23 Control member 28 Solid lubricant single-piece | unit 28a Screw 28b, 28c Concave groove 30 Solid lubricant application device 32 Sliding shaft 40 One case half 41 The other case half 42 Solid lubricant 43 Elastic material 44 Solid lubricant alone 44a Arc-shaped curved surface 44b Concave groove

Claims (4)

Three or more solid lubricants that are arranged side by side in the direction around the axis of the rotating shaft or the sliding shaft and are gradually worn by sliding contact with the peripheral surface of the rotating shaft or the sliding shaft made from a single piece,
Each solid lubricant has a slidable contact surface on the inner side surface of the rotary shaft or a slidable contact shaft, and an outer side surface of the solid lubricant on the rotary shaft. Alternatively, a solid lubricant comprising a mounting portion on which a ring-shaped elastic material biased in the axial direction of the sliding contact shaft is mounted. In case the the rotation axis of the screw is threaded, said the inner peripheral surface of each individual lubricant alone is formed by a screw which is screwed into threaded the screw to the pivoting axis is formed The solid lubricant according to claim 1. One and other case halves fixed to the outside of the rotating shaft or the sliding shaft and containing the solid lubricant according to claim 1 or 2 inside;
The solid lubricant according to claim 1 or 2 accommodated in the one and the other case halves,
An elastic material attached to a mounting portion formed in the solid lubricant ;
With
In at least one of the one and the other case halves,
A restricting portion that restricts the solid lubricant from rotating or sliding is formed by rotating the rotating shaft or sliding the sliding shaft.
Alternatively, the solid lubricant application device is characterized in that a contact portion with which the solid lubricant sliding along the sliding shaft contacts is formed.   The space from the tip of the restricting portion or the contact portion to the circumferential surface of the rotating shaft or the sliding shaft is an insertion space into which the worn solid lubricant is inserted. Solid lubricant application device.

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