JP3122122U - Connection structure between ball screw foreign matter removal member and oil storage part - Google Patents

Abstract

An object of the present invention is to provide a connecting structure between a foreign matter removing member and an oil storage part that can be easily replaced.
The screw shaft 10 and a nut 11 are used in combination. The inner end of a foreign matter removing member 40 is connected to the nut 11 and the screw shaft 10 is screwed into the foreign matter removing member 40. 42, the foreign matter removing member 40 is inserted into the oil storage portion 60, the oil storage portion 60 is fixed and the lubricating oil imparts lubricity to the screw shaft 10, and the foreign matter removing member 40 protrudes from the outer end 63 of the oil storage portion 60. The outer end 63 is provided with a connecting structure, and an oil storage section 60 is detachably installed. The oil storage section 60 is fixed between the nut 11 and the foreign matter removing member 40 so that the replacement can be easily performed. Moreover, the stability of the connection of the oil storage part 60 can be improved.
[Selection] Figure 3

Description

The present invention relates to a connection structure between a foreign matter removing member of a ball screw and an oil storage portion, and more particularly, to a connection structure that can strengthen the connection between the foreign matter removal member and the oil storage portion and can quickly replace the oil storage portion.

The transmission structure of the screw shaft performs mechanical motion transmission using conjugate motion between the screw shaft and the nut. Already used in many machines, a ball screw having a ball interposed between a screw shaft and a nut is the most excellent transmission structure in terms of efficiency and precision. However, if a foreign object adheres to the screw shaft and enters the ball rotation path, the smooth movement of the ball is affected, and in severe cases, the thread groove is damaged and the entire ball screw becomes unusable. turn into. Therefore, there is currently a structure in which a foreign matter removing member is provided at each end of the nut, foreign matter on the screw shaft can be removed, and an oil storage part is installed directly or externally on the foreign matter removing member. There is a structure that gives lubricity to the surface.

1 and 2 are views showing a connection structure between a foreign matter removing member and an oil storage part of the latest ball screw. A nut 11 is screwed onto the screw shaft 10, and foreign matter removing members 20 are provided at both ends of the nut 11. An inner end 21 of the foreign matter removing member 20 is connected to the nut 11, and a screwing portion 22 that is screwed into the screw shaft 10 that penetrates the foreign matter removing member 20 is provided inside the foreign matter removing member 20. 20 and the nut 11 move on the screw shaft 10 together. A hooking portion 24 is provided on the peripheral surface of the outer end 23 of the foreign matter removing member 20, and a vertical groove 25 is provided between the hooking portions 24.

The oil storage unit 30 includes a C-shaped casing 31 having a predetermined length. The housing space 32 formed by the casing 31 is just covered on the outer periphery of the screw shaft 10, and a hooking portion 34 is provided on the hole wall of the inner end 33, and the hooking portion 34 corresponds to the hooking portion 24 of the foreign matter removing member 20. The oil storage part 30 inner end 33 is fixed to the outer edge of the foreign material removal member 20 and the end face of the nut 11, and the oil storage part 30, the foreign material removal member 20 and the nut 11 move together on the screw shaft 10, and the oil storage part 30. The screw shaft 10 is lubricated by the internal lubricating oil.

However, there is room for improvement in the above structure, and the structure in which the inner end 33 of the oil storage portion 30 is fixed between the outer end 23 of the foreign matter removing member 20 and the end surface of the nut 11 has the following two drawbacks. .

1. When exchanging the oil storage part 30 by using up the lubricating oil, it is inconvenient because it is necessary to first remove the screw shaft 10 and then remove the oil storage part 30 and then replace it with a new oil storage part 30. When installed in the machine, the oil storage section 30 cannot be replaced unless the screw shaft 10 is removed, which takes time and is very inconvenient.
2. Since most of the oil storage section 30 is in a suspended state, the connection is unstable, and the engaging portion 34 is deformed by the moment of force formed, which is inconvenient for removing the oil storage section 30 and installing a new oil storage section 30. is there.

The inventor of the present invention has devised the present invention after repeated research and improvement in view of the above-mentioned two drawbacks in the prior art.
Japanese Patent Laid-Open No. 11-37246

The purpose of the present invention is that the length of the foreign matter removing member is longer than the length of the oil storage portion, the outer end of the foreign matter removing member protrudes from the outer end of the oil storage portion, and the outer end of the oil storage portion is connected to the outer end of the foreign matter removing member by the connection structure. With the fixed structure, the oil storage part can be removed by operating the coupling structure without removing the screw shaft, and the convenience of oil storage part replacement can be improved. It is an object of the present invention to provide a connection structure between a foreign matter removing member of a ball screw and an oil storage part, which can improve a drawback of being installed in a floating state.

In order to solve the above-described problems, the present invention provides a connection structure between a foreign matter removing member for a ball screw and an oil storage portion having the following characteristics.

The connection structure between the foreign matter removing member of the ball screw and the oil storage portion according to claim 1 is used for a screw shaft in which a nut is screwed, and an inner end of the foreign matter removing member is connected to a nut end face, A threaded portion into which a screw shaft is screwed is provided inside the foreign matter removing member, and the outer end of the foreign matter removing member penetrates the oil storage portion and protrudes from the outer end of the oil storage portion. A connecting structure is provided at the end, and the connecting structure is fixed to the outer end of the oil storage part, and the oil storage part is detachably installed.

The connection structure between the foreign matter removing member of the ball screw and the oil storage part according to claim 2 is the case of claim 1, wherein the oil storage part is formed of a C-shaped casing having a predetermined length, and is formed by the casing. The accommodation space is covered so as to correspond to both ends of the foreign matter removing member.

The connection structure between the foreign matter removing member of the ball screw and the oil storage part according to claim 3 is the case of claim 1, wherein the connecting structure is such that the fixing ring is screwed into the outer edge of the foreign matter removing member. An external thread groove is provided, the external thread groove at the outer end of the foreign matter removing member protrudes from the outer end of the oil storage part, the fixing ring is screwed, and the fixing ring is detachably installed at the position of the outer end of the oil storage part It is characterized by being.

The connection structure between the foreign matter removing member and oil storage part of the ball screw according to claim 4 is the case of claim 1, wherein the connecting structure is provided with a hooking portion on a peripheral surface of the outer end of the foreign matter removing member, The hooking portion is provided with a slanted collar portion on the outside and inside, a vertical groove is provided at the position of the hooking portion of the foreign matter removing member, and the hooking portion is hooked on the outer end of the oil storage portion. To do.

The connection structure between the foreign matter removing member of the ball screw and the oil storage portion according to claim 5 is the engaging ring groove in which the engaging ring is engaged with the outer edge of the foreign matter removing member in the case of claim 1. The engagement ring groove of the foreign matter removing member protrudes from the outer end of the oil storage portion, the engagement ring is engaged, and the engagement ring is detachably installed at the position of the outer end of the oil storage portion. .

The length of the foreign matter removing member of the present invention is longer than the length of the oil storage portion, the outer end of the foreign matter removing member protrudes from the outer end of the oil storage portion, and the outer end of the oil storage portion is fixed to the outer end of the foreign matter removing member by the connection structure Depending on the structure, the oil storage part can be removed by operating the coupling structure without removing the screw shaft, making it easier to replace the oil storage part, and the oil storage part floats in the air as in the prior art It was possible to improve the defects that were installed in a hot condition.

Embodiments showing the objects, features, and effects of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 3 and 4, the present invention is used for a screw shaft 10 in which a nut 11 is screwed. Two foreign matter removing members 40 are installed at both ends of the nut 11, and the inner end 41 of the foreign matter removing member 40 is connected to the nut 11 by a method such as screwing or fitting, and then the screw shaft 10 is attached to the foreign matter removing member 40. The threaded portion 42 is threadedly engaged with the screw shaft 10, and the foreign matter removing member 40 and the nut 11 move integrally on the screw shaft 10. A connecting structure is provided at the outer end of the foreign matter removing member 40, and the structure is configured by providing an external thread groove 52 into which the fixing ring is screwed to the outer end edge of the foreign matter removing member 40.

The two oil storage portions 60 are constituted by a C-shaped casing 61 having a predetermined length, the axial length is shorter than the axial length of the foreign matter removing member 40, and the housing space 62 formed by the casing 61 is just a foreign matter. The external thread groove 52 at the outer end of the foreign matter removing member 40 protrudes from the outer end 63 of the oil removing part 40 and is covered between both ends of the removing member 40, and the fixing ring 51 of the connecting structure is screwed together so that the oil storing part 60 can be removed. Is installed at the position of the outer end 63.

The axial direction of the oil storage section 60 of the present invention is sandwiched between the nut 11 and the fixing ring 51 to improve the unstable structure in which the oil storage section in the prior art floats in the air. More importantly, by simply removing the fixing ring 51, the oil storage part 60 can be removed directly without removing the screw shaft 10, which increases the convenience of exchanging the oil storage part 60. In particular, the screw shaft is already installed in the machine. If so, its convenience is very high.

5, 6, and 7 are diagrams in which the shape of the fixing ring 51 of the connecting structure according to the present invention is changed, and it is only necessary to screw into the external thread groove 52 on the outer edge of the foreign matter removing member 40. Belongs to the invention.

FIGS. 8 and 9 show a fifth embodiment of the present invention, where the modified portion is in a connecting structure, and the connecting structure is provided with a hooking portion 53 on the outer peripheral surface of the foreign matter removing member 40, and the hooking portion 53. Is provided with a hook portion obliquely toward the outside and the inside, and a vertical groove 54 is provided in the axial direction at the position of the engaging portion 53 of the foreign substance removing member 40, and allows the engaging portion 53 to penetrate the accommodation space 62 of the oil storage portion 60. When the diameter of the longitudinal groove 54 contracts and the engaging portion 53 protrudes from the outer end 63 of the oil storage portion 60, it is supported by the outer end 63 by elastic recovery and has the same effect as that shown in FIGS. Achieve.

FIGS. 10 and 11 show a sixth embodiment of the present invention, in which the modified part is in the connection structure, and the connection structure is an engagement ring groove in which a C-shaped engagement ring 55 is engaged with the outer edge of the foreign matter removing member 40. 56, the engaging ring groove 56 at the outer edge of the foreign substance removing member 40 protrudes from the outer end 63 of the oil storage portion 60, and the engaging ring 55 of the coupling structure is engaged, and is detachably installed at the position of the outer end 63 of the oil storage portion 60. Thus, the same effect as that shown in FIGS.

As can be seen from the above, the connection structure of the present invention is unprecedented, and has the advantage that the connection strength between the foreign matter removing member 40 and the oil storage part 60 can be increased and the oil storage part 60 can be replaced at the same time. Prepare.

The above description shows embodiments of the present invention, and does not limit the scope of the present invention. All changes and modifications of equivalent effects based on the application scope of the present invention are included in the present invention.

It is the three-dimensional exploded view which shows the foreign material removal member and oil storage part by a prior art. It is a perspective view which shows the state after the assembly of the foreign material removal member and oil storage part by a prior art. It is a three-dimensional exploded view showing a foreign matter removing member and an oil storage part according to the present invention. It is a perspective view which shows the state after the assembly of the foreign material removal member and oil storage part by this invention. It is a perspective view which shows the 2nd Example of the connection structure of this invention. It is a perspective view which shows the 3rd Example of the connection structure of this invention. It is a perspective view which shows the 4th Example of the connection structure of this invention. It is a three-dimensional exploded view showing a fifth embodiment of the connection structure of the present invention. It is a perspective view which shows the 5th Example of the connection structure of this invention. It is a perspective view which shows the 6th Example of the connection structure of this invention. It is a three-dimensional exploded view showing a sixth embodiment of the connection structure of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Screw shaft 11 Nut 40 Foreign material removal member 41 Inner end 42 Screw part 51 Fixing ring 52 External thread groove 53 Engagement part 54 Vertical groove 55 Engagement ring 56 Engagement ring groove 60 Oil storage part 61 Casing 62 Housing space 63 Outer end

Claims (5)

Used for a screw shaft with a nut screwed in,
An inner end of the foreign matter removing member is connected to an end surface of the nut, and a screwing portion into which a screw shaft is screwed is provided inside the foreign matter removing member, and an outer end of the foreign matter removing member passes through the oil storage portion. , Projecting from the outer end of the oil storage part, a connection structure is provided at the outer end of the foreign matter removing member, the connection structure is fixed to the outer end of the oil storage part, and the oil storage part is detachably installed Connecting structure of ball screw foreign matter removing member and oil storage part. 2. The oil storage section is constituted by a C-shaped casing having a predetermined length, and an accommodation space formed by the casing is provided so as to correspond to both ends of the foreign matter removing member. A connection structure between the foreign matter removing member of the ball screw and the oil storage part. In the connection structure, an external thread groove is mainly provided in which a fixing ring is screwed to an outer edge of the foreign matter removing member, and the external thread groove at the outer end of the foreign matter removing member protrudes from the outer end of the oil storage portion and is fixed 2. The connection structure between a foreign matter removing member of a ball screw and an oil storage part according to claim 1, wherein the ring is screwed and the fixing ring is detachably installed at the outer end of the oil storage part. In the connection structure, a hooking portion is provided on a peripheral surface of the outer end of the foreign matter removing member, the hooking portion is provided with an oblique flange portion on the outside and inside, and a vertical position is provided at a position of the hooking portion of the foreign matter removing member. 2. The connection structure between a foreign matter removing member for a ball screw and an oil storage portion according to claim 1, wherein a groove is provided, and the engagement portion is engaged with an outer end of the oil storage portion. The connecting structure is provided with a hooking ring groove on which an engaging ring is engaged with an outer edge of the foreign substance removing member, the engaging ring groove of the foreign substance removing member protrudes from the outer end of the oil storage part, and the engaging ring is engaged, 2. The connecting structure between a foreign matter removing member for a ball screw and an oil storage part according to claim 1, wherein the engagement ring is detachably installed at a position of an outer end of the oil storage part.

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