Lubricant supply component

Abstract

To provide a lubricant supply component that has a simple structure and whose orientation and dimension are easily adjustable.SOLUTION: A first male screw part provided on a tubular body of a lubricant supply component is screwed into a first female screw part of a lubricant passage that opens into a slider constituting a linear guide device. The lubricant supply component has: the tubular body; a joint part that can be screwed into the tubular body, and can adjust a relative position and a circumferential phase with respect to the tubular body by rotating relative to the tubular body; and a nut that is screwed into the tubular body and the joint part to fix the tubular body and the joint part.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a lubricant supply component that supplies lubricant to, for example, a linear guide device. [Background technology]

[0002] A linear guide device is a device in which rolling elements roll under load in a rolling path made up of both rolling surfaces on the guide rail and the slider, causing the slider to move linearly (directly) relative to the guide rail.The slider also has a circulation section (a direction change path and a return path) that moves the rolling elements from the end point of the rolling path to the start point.The circulation section and the rolling path form a circulation path in which the rolling elements circulate infinitely.

[0003] Generally, a slider has a main body, end caps, and side seals. End caps are arranged on both ends of the main body in the linear motion direction. Side seals are arranged on the outside (both ends in the linear motion direction) of each end cap. An oil passage that guides lubricant to the direction change path is formed on the surface of the end cap facing the main body. The end caps and side seals are formed with mounting holes for grease nipples (lubricant supply components) that communicate with the oil passages.

[0004] By attaching a grease nipple to this mounting hole, lubricant is introduced from the grease nipple into the oil passage in the end cap and supplied to the direction change path.The lubricant then adheres to the rolling elements in the direction change path, and the rolling elements circulate within the circulation path, lubricating the linear guide device.

[0005] Patent Document 1 describes a linear guide device shown in Fig. 17. In this example, a female thread 18 is formed in the center of a body portion (a portion located above the guide rail 2) of an end cap 14 constituting the slider 1, into which a male thread 20a at the tip of a grease nipple 20 is threadedly engaged. A through hole 16 is formed in each of both leg portions (portions located on both sides in the width direction of the guide rail 2) of the end cap 14. A female thread is formed in the slider body 12 at a position corresponding to the through hole 16 in the end cap 14. A through hole 26 is formed in the side seal 28 at a position corresponding to the female thread 18 in the end cap 14, and a pair of through holes 24 are formed at positions corresponding to the pair of through holes 16 in the end cap 14.

[0006] The bolt 22 is threaded through the through-hole 24 of the side seal 28 and the through-hole 16 of the end cap 14 and into the female thread of the slider body 12, thereby fixing the side seal 28 and the end cap 14 to the slider body 12. The male thread portion 20a at the tip of the grease nipple 20 is threaded through the through-hole 26 of the side seal 28 and into the female thread 18 of the end cap 14, thereby fixing the grease nipple 20 to the end cap 14 via the side seal 28.

[0007] The side seal 28 has a seal lip 30 that is in slidable contact with the outer surface (including the rolling grooves 2a and 2b) of the guide rail 2. The seal lip 30 closes the gap formed between the guide rail 2 and the slider 1.

[0008] In the linear guide device described in Patent Document 1, the male thread portion 20a at the tip of the grease nipple 20 is screwed into the female thread portion 18 of the end cap 14, so the orientation of the grease nipple 20 is fixed.

[0009] In contrast, the mounting structure of a lubricant supply component to a slider of a linear guide device in Patent Document 2 aims to reliably fix the lubricant supply component to the slider in a specified orientation. To achieve this objective, the first and second surfaces of one leg of the fixed component are pressed and inserted between the bottom surface of the recess in the slider and the opposing flat surface of the grease supply component. This fixes the grease supply component to the recess in the slider body with a tightening force created by the tapered first and second surfaces of the fixed component, thereby reliably maintaining the orientation of the grease supply component. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Publication No. 11-287245 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-113349 Summary of the Invention [Problem to be solved by the invention]

[0011] However, the mounting structure of Patent Document 2 requires a fixing part for fixing the grease supply part to the slider, and a recess for fitting the fixing part must be provided on the slider. Furthermore, if the recess is not deep enough, it is difficult to fit the fixing part, while if the recess is too deep, it may affect the internal structure of the slider. Furthermore, since the dimensions of the grease supply part are fixed, it is difficult to adjust it to suit various devices.

[0012] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lubricant supply component that has a simple structure and is easy to adjust in orientation and dimensions. [Means for solving the problem]

[0013] The above object of the present invention can be achieved by the following configuration. (1) A lubricant supply component in which a first male threaded portion provided on a tubular body of the lubricant supply component is screwed into a first female threaded portion of a lubricant passage that opens into a slider constituting a linear guide device, The lubricant supply component is The tubular body; a joint portion that can be threadedly engaged with the tubular body, and that can rotate relative to the tubular body to adjust a relative position and a circumferential phase of the joint portion with respect to the tubular body; a nut that is threadedly engaged with the tubular body and the joint portion to fix the tubular body and the joint portion together; have A lubricant supply component characterized by: (2) The outer peripheral surface of the tubular body has the first male threaded portion formed on one axial side and a second male threaded portion formed on the other axial side, The inner circumferential surface of the tubular body has a second female thread portion formed on the other axial side, the outer peripheral surface of the joint portion has a third male thread portion formed on one axial side and a fourth male thread portion formed on the other axial side, The inner peripheral surface of the nut has a third female thread portion formed on one axial side and a fourth female thread portion formed on the other axial side, The second female threaded portion of the tubular body and the third male threaded portion of the joint portion are threadedly engaged with each other, The second male threaded portion of the tubular body and the third female threaded portion of the nut are threadedly engaged with each other, The fourth male thread portion of the joint portion and the fourth female thread portion of the nut are threadedly engaged with each other. The lubricant supply component according to (1). (3) The second male thread portion of the tubular body and the third female thread portion of the nut are either left-handed or right-handed, The second female thread portion of the tubular body, the third male thread portion of the joint portion, the fourth male thread portion of the joint portion, and the fourth female thread portion of the nut are the other of a left-handed thread and a right-handed thread. (2) The lubricant supply component according to (1). (4) The second female threaded portion of the tubular body, the third male threaded portion of the joint portion, the second male threaded portion of the tubular body, and the third female threaded portion of the nut are either left-handed or right-handed threads, The fourth male thread portion of the joint portion and the fourth female thread portion of the nut are the other of a left-handed thread and a right-handed thread. (2) The lubricant supply component according to (1). (5) The second to fourth male threaded portions and the second to fourth female threaded portions are either left-handed or right-handed. a thread pitch of the second male threaded portion of the tubular body and the third female threaded portion of the nut; a thread pitch between the fourth male thread portion of the joint portion and the fourth female thread portion of the nut; is different (2) The lubricant supply component according to (1). (6) The second to fourth male threaded portions and the second to fourth female threaded portions are either left-handed or right-handed. a thread pitch of the second female thread portion of the tubular body and the third male thread portion of the joint portion; a thread pitch of the second male threaded portion of the tubular body, the third female threaded portion of the nut, the fourth male threaded portion of the joint portion, and the fourth female threaded portion of the nut; is different (2) The lubricant supply component according to (1). [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a lubricant supply component that has a simple configuration and whose orientation and dimensions are easily adjustable. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a plan view showing a linear guide device in a state where a lubricant supplying component is attached to the side surface of a slider. [Figure 2] FIG. 2 is a plan view showing the linear guide device before the lubricant supplying component is attached to the side surface of the slider. [Figure 3] FIG. 3 is an exploded plan view of the lubricant supplying part according to the first embodiment. [Figure 4] FIG. 4 is a cross-sectional view of the nut. [Figure 5] FIG. 5 is a diagram illustrating a method for attaching the tubular body and the nut to each other. [Figure 6] FIG. 6 is a diagram illustrating a method for attaching the tubular body and nut to the joint portion. [Figure 7] FIG. 7 is a diagram illustrating a method for fixing the tubular body and the joint portion by rotating the nut. [Figure 8] 8(a) and (b) are diagrams showing an example in which the orientation (circumferential phase) of the joint portion of the lubricant supplying component is shifted by 180°. [Figure 9] 9(a) and 9(b) are diagrams showing examples in which the length of the lubricant supplying component is increased or decreased. [Figure 10] FIG. 10 is a diagram for explaining a method for attaching the joint portion and the nut to each other. [Figure 11] FIG. 11 is a diagram illustrating a method for attaching the joint portion and nut to the tubular body. [Figure 12] FIG. 12 is a diagram illustrating a method for fixing the tubular body and the joint portion by rotating the nut. [Figure 13] FIG. 13 is a diagram illustrating a method for attaching the tubular body and the nut to each other. [Figure 14] FIG. 14 is a diagram illustrating a method for attaching the tubular body and nut to the joint portion. [Figure 15] FIG. 15 is a diagram illustrating a method for rotating the nut to screw the nut onto the tubular body and the joint portion. [Figure 16] FIG. 16 is a diagram illustrating a method for fixing the tubular body and the joint portion to each other by rotating the joint portion. [Figure 17] FIG. 17 is a perspective view of a conventional linear guide device. DETAILED DESCRIPTION OF THE INVENTION

[0016] [First embodiment] A first embodiment will be described with reference to Figures 1 to 3. In the first embodiment, an example of a mounting structure in which a lubricant supplying part is mounted on the side surface of a slider that constitutes a linear guide device will be described.

[0017] FIG. 1 is a plan view showing a linear guide device with a grease supply component 4 as a lubricant supply component attached to the side surface of a slider 1. FIG. 2 is a plan view showing the linear guide device before the grease supply component 4 is attached to the side surface of the slider 1. FIG. 3 is an exploded plan view showing the grease supply component 4 according to the first embodiment. Note that, of the components of the slider 1, components that are the same as those of the conventional slider shown in FIG. 17 are given the same reference numerals and descriptions thereof will be omitted.

[0018] 1 and 2, grease supply paths (lubricant paths) 121, 122 are formed inside slider body 12 that constitutes slider 1. These grease supply paths 121, 122 extend in directions perpendicular to each other and communicate with each other at the center of slider body 12.

[0019] One end of one grease supply passage 121 opens to the end cap 14 side. The other grease supply passage 122 opens to the side surface 12a of the slider body 12. A first female thread portion 122a is formed at the end of the grease supply passage 122 on the side surface 12a side. A first male thread portion 54 of a grease supply component 4 serving as a lubricant supply component, which will be described later, is threadedly engaged with this first female thread portion 122a.

[0020] As shown in Figure 3, the grease supply part 4, which serves as a lubricant supply part, has a tubular body 5, a joint part 6 that can be threaded onto the tubular body 5 and that can adjust its relative position and circumferential phase with respect to the tubular body 5 by rotating relative to the tubular body 5, and a nut 7 that threads onto the tubular body 5 and the joint part 6 to fix the tubular body 5 and the joint part 6 together.

[0021] The tubular body 5 is a tubular member extending in the axial direction (the vertical direction in Figs. 1 to 3), and has a grease supply passage 5a that penetrates the interior of the tubular body 5 in the axial direction. A small diameter section 51 is arranged on one axial side of the tubular body 5 (the upper side in Figs. 1 to 2, the lower side in Fig. 3), and a large diameter section 52, which has a larger diameter than the small diameter section 51, is arranged on the other axial side (the lower side in Figs. 1 to 2, the upper side in Fig. 3). The small diameter section 51 and the large diameter section 52 are connected in the axial direction by a step section 53. As shown in Fig. 1, the step section 53 abuts against the side surface 12a of the slider body 12, thereby positioning the grease supply part 4 relative to the slider body 12.

[0022] The outer peripheral surface of the tubular body 5 has a first male threaded portion 54 formed on one axial side, a second male threaded portion 55 formed on the other axial side, and a non-threaded portion 56 formed in an intermediate portion of the axial direction. More specifically, the first male threaded portion 54 is formed on the outer peripheral surface of the small diameter portion 51, the second male threaded portion 55 is formed on the other axial side of the outer peripheral surface of the large diameter portion 52, and the non-threaded portion 56 is formed on one axial side of the outer peripheral surface of the large diameter portion 52.

[0023] The inner circumferential surface of the tubular body 5 has a second female thread portion 57 formed on the other axial side. More specifically, the second female thread portion 57 is formed on the other axial side of the inner circumferential surface of the large diameter portion 52, at a position corresponding to the axial position where the second male thread portion 55 is formed. The second female thread portion 57 forms part of the oil supply passage 5a.

[0024] The joint portion 6 has a tubular small diameter portion 61 arranged on one axial side, a tubular large diameter portion 62 having a larger diameter than the small diameter portion 61 and arranged connected to the other axial side of the small diameter portion 61, and a box-shaped main body portion 63 arranged connected to the other axial side of the large diameter portion 62.

[0025] The outer peripheral surface of the joint portion 6 has a third male thread portion 64 formed on one axial side and a fourth male thread portion 65 formed on the other axial side of the third male thread portion 64. More specifically, the third male thread portion 64 is formed on the outer peripheral surface of the small diameter portion 61, and the fourth male thread portion 65 is formed on the outer peripheral surface of the large diameter portion 62.

[0026] The main body 63 has a recess 63c having a fifth female thread portion 63b formed on a side surface 63a facing perpendicular to the axial direction (left-right direction in FIG. 3). The recess 63c functions as a lubricant supply port, and a male thread portion (not shown) of a grease nipple or the like connected to the lubrication component 4 can be threadedly engaged with the fifth female thread portion 63b of the recess 63c. Furthermore, a grease supply passage 6a extending in the axial direction is formed inside the small diameter portion 61, the large diameter portion 62, and the main body 63. The grease supply passage 6a extends in the axial direction from one axial end portion (the lower end in FIG. 3) of the small diameter portion 61 through the large diameter portion 62 and the main body 63, and communicates with the recess 63c of the main body 63.

[0027] 4 shows a cross-sectional view of the nut 7. The inner peripheral surface of the nut 7 has a third female thread portion 71 formed on one axial side, a fourth female thread portion 72 formed on the other axial side, and a groove portion 73 formed in the middle portion in the axial direction.

[0028] The groove 73 is located radially outward of the third female thread portion 71 and the fourth female thread portion 72. The provision of the groove 73 makes it possible to prevent an incomplete thread portion from being formed in the axial middle portion of the nut 7 when thread machining to form the third female thread portion 71 and the fourth female thread portion 72 is performed from both axial sides of the nut 7.

[0029] The second to fourth male threaded portions 55, 64, 65 and the second to fourth female threaded portions 57, 71, 72 formed as described above are threadedly engaged with the second female threaded portion 57 of the tubular body 5 and the third male threaded portion 64 of the joint portion 6, the second male threaded portion 55 of the tubular body 5 and the third female threaded portion 71 of the nut 7, and the fourth male threaded portion 65 of the joint portion 6 and the fourth female threaded portion 72 of the nut 7 by the process described below.

[0030] Here, the second male threaded portion 55 of the tubular body 5 and the third female threaded portion 71 of the nut 7 are either left-handed or right-handed threads (for example, left-handed threads in this embodiment) and have the same thread pitch. On the other hand, the second female threaded portion 57 of the tubular body 5, the third male threaded portion 64 of the joint part 6, the fourth male threaded portion 65 of the joint part 6, and the fourth female threaded portion 72 of the nut 7 are the other of left-handed or right-handed threads (for example, right-handed threads in this embodiment) and have the same thread pitch.

[0031] The following describes a method for assembling the lubrication part 4. Fig. 5 is a diagram for explaining a method for attaching the tubular body 5 and the nut 7 to each other. Fig. 6 is a diagram for explaining a method for attaching the tubular body 5 and the nut 7 to the joint part 6 to each other. Fig. 7 is a diagram for explaining a method for fixing the tubular body 5 and the joint part 6 by rotating the nut 7.

[0032] First, as shown in FIG. 5, the second male threaded portion 55 of the tubular body 5 and the third female threaded portion 71 of the nut 7 are screwed together to attach the tubular body 5 and the nut 7 to each other.

[0033] 6, the third male thread portion 64 of the joint 6 is threadedly engaged with the second female thread portion 57 of the tubular body 5, thereby attaching the joint 6 and the tubular body 5 to each other, and the fourth male thread portion 65 of the joint 6 is threadedly engaged with the fourth female thread portion 72 of the nut 7, thereby attaching the joint 6 and the nut 7 to each other. As a result, the oil supply passage 5a of the tubular body 5 and the oil supply passage 6a of the joint 6 are connected to each other.

[0034] Here, by rotating the joint part 6 relative to the tubular body 5 and the nut 7, it is possible to adjust the axial relative position and circumferential phase of the joint part 6 with respect to the tubular body 5 and the nut 7. In other words, since it is possible to adjust the relative position and circumferential phase of the joint part 6 with respect to the slider body 12 to which the tubular body 5 is fixed, it is possible to set the relative position and circumferential phase of the fifth female thread part 63b provided on the joint part 6 with respect to the slider body 12 as desired.

[0035] As described above, the second female thread portion 57 of the tubular body 5, the third male thread portion 64 of the joint portion 6, the fourth male thread portion 65 of the joint portion 6, and the fourth female thread portion 72 of the nut 7 are all right-handed threads with the same thread pitch. Therefore, it is easy to adjust the relative position and circumferential phase by rotating the joint portion 6 relative to the tubular body 5 and the nut 7. In other words, the orientation and dimensions of the lubrication part 4 are easy to adjust.

[0036] Here, the tubular body 5 is threadedly engaged with the nut 7 via the second male thread portion 55, which is a left-handed thread, and the joint portion 6 is threadedly engaged with the nut 7 via the fourth male thread portion 65, which is a right-handed thread. Therefore, as shown in FIG. 7 , when the nut 7 is rotated in one direction with the phase of the joint portion 6 fixed relative to the tubular body 5, the tubular body 5 and the joint portion 6 attempt to move relative to each other, either toward or away from each other. Here, because the second female thread portion 57 of the tubular body 5 and the third male thread portion 64 of the joint portion 6 are already threadedly engaged, when the tubular body 5 and the joint portion 6 attempt to move relative to each other, there is no gap between the threads of the second female thread portion 57 and the third male thread portion 64, and the threads come into contact with each other. Furthermore, when the nut 7 is rotated, frictional force is generated between the second female thread portion 57 and the third male thread portion 64. Similarly, a frictional force is generated between the second male thread portion 55 of the tubular body 5 and the third female thread portion 71 of the nut 7, and a frictional force is generated between the fourth male thread portion 65 of the joint portion 6 and the fourth female thread portion 72 of the nut 7. In this way, the nut 7 fixes the joint portion 6 at a desired relative position and circumferential phase with respect to the tubular body 5.

[0037] 8(a) and (b) show an example in which the orientation (circumferential phase) of the joint portion 6 of the lubrication part 4 is shifted by 180°. In this way, the orientation of the recess 63c serving as the lubricant supply port can be determined arbitrarily and then fixed with the nut 7, making phase alignment easy.

[0038] 9(a) and (b) show examples in which the length of the grease supply part 4 is increased or decreased. In this way, the length of the grease supply part 4 can be adjusted and then fixed with the nut 7, allowing for flexible adaptation to the device.

[0039] As described above, according to the greasing component 4 of this embodiment, the first male thread portion 54 provided on the tubular body of the greasing component is threadedly engaged with the first female thread portion 122a of the greasing passage 122 that opens to the slider 1 that constitutes the linear guide device. The greasing component 4 further includes a tubular body 5, a joint portion 6 that can be threadedly engaged with the tubular body 5 and that can adjust its relative position and circumferential phase with respect to the tubular body 5 by rotating relative to the tubular body 5, and a nut 7 that threadably engages with the tubular body 5 and the joint portion 6 to fix the tubular body 5 and the joint portion 6 together. Therefore, it is possible to provide a greasing component 4 that has a simple configuration and is easy to adjust its orientation and dimensions.

[0040] The outer peripheral surface of the tubular body 5 has a first male threaded portion 54 formed on one axial side and a second male threaded portion 55 formed on the other axial side, the inner peripheral surface of the tubular body 5 has a second female threaded portion 57 formed on the other axial side, the outer peripheral surface of the coupling portion 6 has a third male threaded portion 64 formed on one axial side and a fourth male threaded portion 65 formed on the other axial side, and the inner peripheral surface of the nut 7 has a third female threaded portion 71 formed on one axial side and a fourth female threaded portion 72 formed on the other axial side. The second female threaded portion 57 of the tubular body 5 is threadedly engaged with the third male threaded portion 64 of the coupling portion 6, the second male threaded portion 55 of the tubular body 5 is threadedly engaged with the third female threaded portion 71 of the nut 7, and the fourth male threaded portion 65 of the coupling portion 6 is threadedly engaged with the fourth female threaded portion 72 of the nut 7. In this way, a lubrication part 4 can be provided that has a simple configuration and is easy to adjust in orientation and dimensions.

[0041] Furthermore, the second male threaded portion 55 of the tubular body 5 and the third female threaded portion 71 of the nut 7 are either left-handed or right-handed threads (for example, left-handed threads in this embodiment), and the second female threaded portion 57 of the tubular body 5, the third male threaded portion 64 of the joint portion 6, the fourth male threaded portion 65 of the joint portion 6, and the fourth female threaded portion 72 of the nut 7 are the other of left-handed or right-handed threads (for example, right-handed threads in this embodiment). Therefore, when the nut 7 is rotated, the tubular body 5 and the joint portion 6 attempt to move relatively closer to or farther away from each other, generating frictional forces between the mating threaded portions (the second male threaded portion 55 and the third female threaded portion 71; the third male threaded portion 64 and the second female threaded portion 57; the fourth male threaded portion 65 and the fourth female threaded portion 72), and the tubular body 5 and the joint portion 6 can be fixed via the nut 7.

[0042] [Second embodiment] In the lubrication part 4 of the first embodiment, the second male threaded portion 55 of the tubular body 5 and the third female threaded portion 71 of the nut 7 are one of left-handed and right-handed threads (for example, left-handed threads in this embodiment), and the second female threaded portion 57 of the tubular body 5, the third male threaded portion 64 of the joint part 6, the fourth male threaded portion 65 of the joint part 6, and the fourth female threaded portion 72 of the nut 7 are the other of left-handed and right-handed threads (for example, right-handed threads in this embodiment). However, the thread orientations of the second to fourth male threaded portions 55, 64, 65 and the second to fourth female threaded portions 57, 71, 72 may be configured as in the second embodiment described below.

[0043] In the lubrication part 4 of the second embodiment, the second female threaded portion 57 of the tubular body 5, the third male threaded portion 64 of the joint part 6, the second male threaded portion 55 of the tubular body 5, and the third female threaded portion 71 of the nut 7 are either left-handed or right-handed threads (for example, right-handed threads in this embodiment) and have the same thread pitch. Also, the fourth male threaded portion 65 of the joint part 6 and the fourth female threaded portion 72 of the nut 7 are the other left-handed or right-handed threads (for example, left-handed threads in this embodiment) and have the same thread pitch.

[0044] The following describes a method for assembling the lubrication part 4. Fig. 10 is a diagram for explaining a method for attaching the joint part 6 and the nut 7 to each other. Fig. 11 is a diagram for explaining a method for attaching the joint part 6 and the nut 7 to the tubular body 5 to each other. Fig. 12 is a diagram for explaining a method for fixing the tubular body 5 to the joint part 6 by rotating the nut 7.

[0045] First, as shown in FIG. 10, the fourth male thread portion 65 of the joint portion 6 and the fourth female thread portion 72 of the nut 7 are screwed together to attach the joint portion 6 and the nut 7 to each other.

[0046] 11 , the second male threaded portion 55 of the tubular body 5 is threadedly engaged with the third female threaded portion 71 of the nut 7 to attach the tubular body 5 to the nut 7, and the third male threaded portion 64 of the joint portion 6 is threadedly engaged with the second female threaded portion 57 of the tubular body 5 to attach the joint portion 6 to the tubular body 5. This allows the oil supply passage 5a of the tubular body 5 and the oil supply passage 6a of the joint portion 6 to communicate with each other.

[0047] Here, by rotating the joint part 6 relative to the tubular body 5 and the nut 7, it is possible to adjust the axial relative position and circumferential phase of the joint part 6 with respect to the tubular body 5 and the nut 7. In other words, since it is possible to adjust the relative position and circumferential phase of the joint part 6 with respect to the slider body 12 to which the tubular body 5 is fixed, it is possible to set the position and circumferential phase of the fifth female thread part 63b provided on the joint part 6 as desired.

[0048] Here, the tubular body 5 is threaded onto the nut 7 with the second male thread portion 55, which is a right-handed thread, and the joint portion 6 is threaded onto the nut 7 with the fourth male thread portion 65, which is a left-handed thread. Therefore, as shown in FIG. 12 , when the nut 7 is rotated in one direction with the phase of the joint portion 6 adjusted relative to the tubular body 5, the tubular body 5 and the joint portion 6 attempt to move toward or away from each other. Here, because the second female thread portion 57 of the tubular body 5 and the third male thread portion 64 of the joint portion 6 are already threadedly engaged, when the tubular body 5 and the joint portion 6 attempt to move relative to each other, there is no gap between the threads of the second female thread portion 57 and the third male thread portion 64, and the threads come into contact with each other. Furthermore, when the nut 7 is rotated, frictional force is generated between the second female thread portion 57 and the third male thread portion 64. Similarly, a frictional force is generated between the second male thread portion 55 of the tubular body 5 and the third female thread portion 71 of the nut 7, and a frictional force is generated between the fourth male thread portion 65 of the joint portion 6 and the fourth female thread portion 72 of the nut 7. In this way, the nut 7 fixes the joint portion 6 at a desired relative position and circumferential phase with respect to the tubular body 5.

[0049] As described above, according to the lubrication part 4 of this embodiment, the second female threaded portion 57 of the tubular body 5, the third male threaded portion 64 of the joint portion 6, the second male threaded portion 55 of the tubular body 5, and the third female threaded portion 71 of the nut 7 are one of left-handed and right-handed threads (for example, right-handed threads in this embodiment), and the fourth male threaded portion 65 of the joint portion 6 and the fourth female threaded portion 72 of the nut 7 are the other of left-handed and right-handed threads (for example, left-handed threads in this embodiment), and have the same thread pitch. Therefore, when the nut 7 is rotated, the tubular body 5 and the joint portion 6 attempt to move toward or away from each other, generating frictional forces between the mating threaded portions (the second male threaded portion 55 and the third female threaded portion 71; the third male threaded portion 64 and the second female threaded portion 57; the fourth male threaded portion 65 and the fourth female threaded portion 72), and the tubular body 5 and the joint portion 6 can be fixed via the nut 7.

[0050] [Third embodiment] In the third embodiment, the second to fourth male threaded portions 55, 64, 65 and the second to fourth female threaded portions 57, 71, 72 may be either left-handed or right-handed (for example, right-handed in this embodiment), and all of the thread directions may be the same. In this case, the thread pitch of the second male threaded portion 55 of the tubular body 5 and the third female threaded portion 71 of the nut 7 is configured to be different from the thread pitch of the fourth male threaded portion 65 of the joint portion 6 and the fourth female threaded portion 72 of the nut 7. For example, the thread pitch of the former is set to be coarse (large pitch), and the thread pitch of the latter is set to be fine (small pitch). Note that the thread pitch of the second female threaded portion 57 of the tubular body 5 and the third male threaded portion 64 of the joint portion 6 is set to be the same as either the thread pitch of the former or the thread pitch of the latter.

[0051] In this embodiment, the tubular body 5, the nut 7, and the joint portion 6 are screwed together in the same manner as in the first or second embodiment, and the axial relative position and circumferential phase of the joint portion 6 with respect to the tubular body 5 and the nut 7 are adjusted. Then, the nut 7 is rotated to fix the tubular body 5 and the joint portion 6 together.

[0052] That is, because the second male threaded portion 55 of the tubular body 5 that threads onto the nut 7 and the fourth male threaded portion 65 of the joint portion 6 have different thread pitches, when the nut 7 is rotated in one direction, the tubular body 5 and the joint portion 6 attempt to move relatively closer to or farther away from each other. This generates frictional force between the threaded portions that thread together (the second male threaded portion 55 and the third female threaded portion 71; the third male threaded portion 64 and the second female threaded portion 57; the fourth male threaded portion 65 and the fourth female threaded portion 72), allowing the tubular body 5 and the joint portion 6 to be fixed together via the nut 7.

[0053] [Fourth embodiment] In the fourth embodiment, the second to fourth male threaded portions 55, 64, 65 and the second to fourth female threaded portions 57, 71, 72 may be either left-handed or right-handed (for example, right-handed in this embodiment), and all of the threads may have the same direction. The thread pitch of the second female threaded portion 57 of the tubular body 5 and the third male threaded portion 64 of the joint portion 6 is configured to be different from the thread pitch of the second male threaded portion 55 of the tubular body 5, the third female threaded portion 71 of the nut 7, the fourth male threaded portion 65 of the joint portion 6, and the fourth female threaded portion 72 of the nut 7. The thread pitch of the former may be coarse (large pitch) and the thread pitch of the latter fine (small pitch); however, since the nominal diameter of the former is usually smaller, it is preferable that the thread pitch of the former be fine (small pitch) and the thread pitch of the latter be coarse (large pitch).

[0054] Fig. 13 is a diagram illustrating a method for attaching the tubular body 5 and the nut 7 to each other. Fig. 14 is a diagram illustrating a method for attaching the tubular body 5 and the nut 7 to the joint portion 6 to each other. Fig. 15 is a diagram illustrating a method for rotating the nut 7 to screw the nut 7 onto the tubular body 5 and the joint portion 6. Fig. 16 is a diagram illustrating a method for fixing the tubular body 5 and the joint portion 6 to each other by rotating the joint portion 6.

[0055] 13, the tubular body 5 and the nut 7 are attached to each other by threading the second male threaded portion 55 of the tubular body 5 into the third female threaded portion 71 and the fourth female threaded portion 72 of the nut 7. At this time, the large diameter portion 52 of the tubular body 5 penetrates the nut 7, and the tip end of the large diameter portion 52 is located on the other axial side (upper side in the figure) than the nut 7.

[0056] In this embodiment, since the third female thread portion 71 and the fourth female thread portion 72 of the nut 7 have the same thread direction and thread pitch, the groove portion 73 is not provided in the nut 7, and the third female thread portion 71 and the fourth female thread portion 72 are made into one continuous female thread portion. Therefore, a nut 7 of a normal shape can be used.

[0057] Next, as shown in Figure 14, the third male thread portion 64 of the joint 6 is threadedly engaged with the second female thread portion 57 of the tubular body 5, thereby attaching the joint 6 and the tubular body 5 to each other. This allows the oil supply passage 5a of the tubular body 5 to communicate with the oil supply passage 6a of the joint 6. At this stage, the fourth male thread portion 65 of the joint 6 has not yet been threadedly engaged with the fourth female thread portion 72 of the nut 7. Because only the third male thread portion 64 of the joint 6 is threadedly engaged with the second female thread portion 57 of the tubular body 5, the relative position and circumferential phase of the joint 6 can be easily adjusted by rotating the joint 6.

[0058] 15 , the nut 7 is rotated and moved to the other axial side, and the fourth female thread portion 72 of the nut 7 is threadedly engaged with the fourth male thread portion 65 of the joint part 6, thereby attaching the nut 7 and the joint part 6 to each other. As a result, the nut 7 is attached to the joint part 6 in addition to the tubular body 5.

[0059] As described above, the third male thread portion 64 and the fourth male thread portion 65 of the joint portion 6 are both right-handed threads, but the thread pitch of the third male thread portion 64 is smaller than the thread pitch of the fourth male thread portion 65.

[0060] 16 , when the joint part 6 is rotated in one direction, a difference occurs between the amount of relative movement of the joint part 6 with respect to the tubular body 5 that is threadedly engaged with the third male thread part 64 and the amount of relative movement of the joint part 6 with respect to the nut that is threadedly engaged with the fourth male thread part 65. This generates a frictional force between the threaded parts that are threadedly engaged with each other (the second male thread part 55 and the third female thread part 71; the third male thread part 64 and the second female thread part 57; the fourth male thread part 65 and the fourth female thread part 72), and the tubular body 5 and the joint part 6 can be fixed together via the nut 7. [Explanation of symbols]

[0061] 1 slider 12 Slider body 12a side 14 End cap 16 through holes 18 Female thread 121,122 Grease passage (lubricant passage) 122a First female thread 2 Guide rails 2a, 2b Rolling groove 20 Grease nipple 20a male thread 22 volts 24 through holes 26 Through hole 28 Side seal 30 Sealing Lip 4. Grease parts (lubricant supply parts) 5 Tubular body 5a Greasing path 51 Small diameter section 52 Large diameter section 53 Step part 54 First male thread 55 Second male thread 56 Non-threaded part 57 Second female thread 6 Joint 6a Greasing path 61 Small diameter section 62 Large diameter section 63 Main body 63a side 63b Fifth female thread 63c Recess 64 Third male thread 65 Fourth male thread 7 Nuts 71 Third female thread 72 Fourth female thread 73 Groove

Claims

1. A lubricant supply component, in which a first male thread portion provided on a tubular body of the lubricant supply component is screwed into a first female thread portion of a lubricant passage that opens into a slider constituting a linear guide device, The lubricant supply component includes: The tubular body; a joint portion that can be screwed to the tubular body, and that can adjust a relative position and a circumferential phase with respect to the tubular body by rotating relatively to the tubular body; a nut that is screwed onto the tubular body and the joint portion to fix the tubular body and the joint portion; have A lubricant supply component characterized by:

2. The outer circumferential surface of the tubular body has the first male threaded portion formed on one axial side and a second male threaded portion formed on the other axial side, The inner circumferential surface of the tubular body has a second female thread portion formed on the other axial side, The outer circumferential surface of the joint portion has a third male thread portion formed on one axial side and a fourth male thread portion formed on the other axial side, The inner peripheral surface of the nut has a third female thread portion formed on one axial side and a fourth female thread portion formed on the other axial side, The second female threaded portion of the tubular body and the third male threaded portion of the joint portion are screwed together, The second male threaded portion of the tubular body and the third female threaded portion of the nut are screwed together, The fourth male thread portion of the joint portion and the fourth female thread portion of the nut are screwed together. The lubricant supply component of claim 1 .

3. The second male threaded portion of the tubular body and the third female threaded portion of the nut are one of left-handed threads and right-handed threads, The second female thread portion of the tubular body, the third male thread portion of the joint portion, the fourth male thread portion of the joint portion, and the fourth female thread portion of the nut are the other of a left-handed thread and a right-handed thread. The lubricant supply component of claim 2.

4. the second female threaded portion of the tubular body, the third male threaded portion of the joint portion, the second male threaded portion of the tubular body, and the third female threaded portion of the nut are one of left-handed threads and right-handed threads; The fourth male thread portion of the joint portion and the fourth female thread portion of the nut are the other of a left-handed thread and a right-handed thread. The lubricant supply component of claim 2.

5. The second to fourth male threaded portions and the second to fourth female threaded portions are either left-handed or right-handed. a thread pitch of the second male threaded portion of the tubular body and the third female threaded portion of the nut; A thread pitch between the fourth male thread portion of the joint portion and the fourth female thread portion of the nut; and Different The lubricant supply component of claim 2.

6. The second to fourth male threaded portions and the second to fourth female threaded portions are either left-handed or right-handed. A thread pitch of the second female thread portion of the tubular body and the third male thread portion of the joint portion; The second male threaded portion of the tubular body, the third female threaded portion of the nut, the fourth male threaded portion of the joint portion, and the fourth female threaded portion of the nut; and a thread pitch of the fourth male threaded portion of the tubular body, the third female threaded portion of the nut, the fourth male threaded portion of the joint portion, and the fourth female threaded portion of the nut. Different The lubricant supply component of claim 2.

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