KR102645826B1 - Open-type curve-shaped sliding block and sliding block assembly with the sliding block - Google Patents

Abstract

According to one embodiment of the present invention, it is a sliding block that reciprocates linearly in the longitudinal direction of the screw by rotation of the screw, and the sliding block is configured to surround at least a portion of the circumference of the screw, but is an open type that does not surround the entire circumference of the screw. It is a block and has a plurality of detachable bearing modules 200, each bearing module 200 has one main bearing 230 in contact with the inclined surface of the thread of the screw, and the main bearing of the plurality of bearing modules Disclosed is an open sliding block configured to be installed at an angle in a first direction of the screw longitudinal direction and to contact the first inclined surface of the screw bone of the screw.

Description

Open-type curve-shaped sliding block and sliding block assembly with the sliding block}

The present invention relates to a transfer device such as an orthogonal robot, and more specifically, to a sliding block that performs linear reciprocating motion by the rotation of a screw in the transfer device and a sliding block assembly including the same.

In general, a “cartesian robot” or “cartesian coordinate robot” consists of a driving part such as a screw or a belt and a guide part such as an LM guide, and combines one or more 1-axis transfer device modules that reciprocate in a straight line to create one-dimensional, two-dimensional, or It is implemented as a three-dimensional moving transport device and is used in various industrial fields due to its high mechanical strength and precision.

In a typical ball screw power transmission device, a cylindrical sliding block is installed on the outside of the screw shaft, and a number of balls are arranged along the thread or groove trace of the screw shaft inside the sliding block. When the screw shaft rotates, there is a gap between the screw shaft and the sliding block. The rolling motion of multiple balls causes the sliding block to move in a straight line.

However, since this conventional ball screw power transmission device is a cylindrical closed type in which the sliding block completely surrounds the screw shaft, it cannot support the shaft at the midpoint of the screw shaft. As the shaft becomes longer, it bends under the load, so the length of the shaft or the sliding block It has the disadvantage of having to limit the load applied to it.

In addition, in order for the rotational force of the screw shaft to be transmitted to the ball, contact must be maintained at a certain contact pressure (hereinafter referred to as "preload") to generate the friction force necessary for force transmission between the ball and the screw bone of the screw shaft. In a closed type sliding block, the balls are inside the sliding block and are not exposed to the outside, so it is difficult to adjust the preload of each ball to an appropriate level, and there is a problem in that the preload changes significantly during operation.

1. Korean Patent Publication No. 10-2019-0106298 (published on September 18, 2019)

The present invention was made to solve the above problems, and provides an open curved sliding block in which the sliding block partially surrounds a screw shaft and a method of manufacturing the same.

Another object of the present invention is to provide a sliding block assembly that can easily adjust the preload when the preload between the outer ring surface (outer peripheral surface) of the bearing and the thread of the screw is outside the appropriate range during initial assembly or operation.

According to one embodiment of the present invention, it is a sliding block that reciprocates linearly in the longitudinal direction of the screw by rotation of the screw, and the sliding block is configured to surround at least a portion of the circumference of the screw, but is an open type that does not surround the entire circumference of the screw. It is a block and has a plurality of detachable bearing modules 200, each bearing module 200 has one main bearing 230 in contact with the inclined surface of the thread of the screw, and the main bearing of the plurality of bearing modules Disclosed is an open sliding block configured to be installed at an angle in a first direction of the screw longitudinal direction and to contact the first inclined surface of the screw bone of the screw.

According to one embodiment of the present invention, a method of manufacturing a sliding block that reciprocates linearly in the longitudinal direction of the screw by rotation of the screw, in which a cylindrical member having an outer peripheral surface and an inner peripheral surface is formed in the center by forming a through hole in the longitudinal direction bisecting to form a semicircular member; forming a sliding block by milling the semicircular member, wherein the outer peripheral surface and the inner peripheral surface of the cylindrical member become the upper and lower surfaces of the sliding block, respectively; and forming a plurality of bearing module receiving portions on the surface of the sliding block.

According to one embodiment of the present invention, manufacturing the sliding block is simple and easy as the sliding block has an open curved sliding block shape that partially surrounds and surrounds the screw shaft, and the bearings are installed in a plurality of radial directions with respect to the screw axis. It can be installed to withstand high loads while reducing noise and vibration.

According to one embodiment of the present invention, the bearing module attached to the sliding block can be installed by moving the installation position in the radial direction of the screw axis, so even when the screw diameter changes, the installation height of the bearing module can be adjusted using a height adjustment means such as a washer. By adjusting the pressure so that the bearing presses toward the central axis of the screw, the load of the sliding block acting on the screw is not distributed and acts on the central axis of the screw, thereby reducing vibration or noise when moving the sliding block.

In addition, the sliding block assembly according to an embodiment of the present invention has the advantage of being able to easily adjust the preload when the preload between the outer ring surface (outer peripheral surface) of the bearing and the thread of the screw is outside an appropriate range during assembly or operation.

1 and 2 are perspective views of a sliding block according to an embodiment of the present invention;
Figure 3 is a diagram explaining a sliding block according to one embodiment;
Figure 4 is a perspective view of a bearing module according to one embodiment;
Figure 5 is an exploded perspective view of a bearing module according to an embodiment;
Figure 6 is a front view of a sliding block according to one embodiment;
7 and 8 are diagrams illustrating the arrangement relationship between the bearing module and the screw in one embodiment;
Figure 9 is a diagram explaining the installation depth of the bearing module according to the size of the screw;
Figure 10 is a diagram explaining the tilt direction of the bearing according to one embodiment;
11 is a diagram illustrating a method of manufacturing a sliding block according to an embodiment;
12 is a diagram illustrating various embodiments of sliding block shapes;
Figure 13 is a perspective view of the sliding block assembly and rail assembly of one embodiment;
Figure 14 is a perspective view of a sliding block assembly according to one embodiment;
Figure 15 is an exploded perspective view of a sliding block assembly according to one embodiment;
Figure 16 is a front view of the sliding block assembly and rail assembly of one embodiment;
Figure 17 is a front view of an alternative embodiment sliding block assembly and rail assembly.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments related to the attached drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure will be thorough and complete and so that the spirit of the invention can be sufficiently conveyed to those skilled in the art.

As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. The expressions 'comprises', 'consists of', and 'consists of' used in the specification refer to the omission of one or more of the mentioned components or the presence or addition of one or more other components in addition to the mentioned components. does not rule out

In this specification, when a component is mentioned as being connected (or coupled, fastened, attached, etc.) to another component, it is either directly connected (or coupled, fastened, attached, etc.) to the other component, or there is a third party between them. This means that it can be indirectly connected (or combined, fastened, attached, etc.) through components.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing specific embodiments below, various specific details have been written to explain the invention in more detail and to aid understanding. However, the reader who has sufficient knowledge in the field to understand the present invention may You can recognize that it can be used even without specific contents. In some cases, it is mentioned in advance that when describing the invention, parts that are commonly known but are largely unrelated to the invention are not described in order to prevent confusion when explaining the invention.

1 and 2 are perspective views of the sliding block 100 equipped with the bearing module 200 according to an embodiment of the present invention, and Figure 3 is a perspective view of the sliding block 100 with the bearing module 200 excluded. am.

Referring to Figures 1 to 3, the sliding block 100 according to one embodiment may be mounted on the screw 10. The screw 10 has a screw groove formed along its surface, and the sliding block 100 is coupled to the screw 10 to enable a reciprocating sliding movement.

The sliding block 100 includes a plurality of bearing modules 200. In the illustrated embodiment, the sliding block 100 is provided with three bearing modules 200a, 200b, and 200c, but this is illustrative and in alternative embodiments, any number of bearing modules 200, two or more, may be included in the sliding block ( 100).

Each bearing module (200a, 200b, 200c) is provided with one main bearing (230a, 230b, 230c) protruding downward at the bottom, that is, on the surface facing the screw 10. Each main bearing 230 (hereinafter simply referred to as a 'bearing') is installed inclined toward the screw 10, and the outer ring (outer peripheral surface) of the bearing 230 is configured to contact the inclined surface of the thread of the screw 10. Bearing 230 may be, for example, a radial bearing.

In a preferred embodiment, the bearing 230 of the bearing module 200 is configured to contact the surface of the screw 10 in at least two radial directions of the screw 10. For example, as indicated by a dotted line in FIG. 1, a plurality of bearing modules 200 are installed along at least two columns (D1, D2) parallel to the longitudinal direction (Z direction) of the sliding block and spaced apart from each other. ) is installed. For example, in the embodiment of Figure 1, the first bearing module 200a and the third bearing module 200c are aligned and mounted along the first row D1, and the second bearing module 200b is installed along the second row D2. This is equipped.

In an alternative embodiment, when the sliding block 100 is provided with four or more bearing modules 200, the bearing modules 200 may be arranged in a zigzag manner along the longitudinal direction (Z direction). For example, 1st, 3rd, 5th,… The bearing modules 200a, 200c,... are mounted on the sliding block 100 along the first row D1 and are located in the second, fourth, sixth,... It will be understood that the bearing modules 200b,... may be mounted on the sliding block 100 along the second row D2.

Referring to Figure 3, the sliding block 100 is an approximately hexahedral-shaped member, but the upper surface 110 and the lower surface 120 may each be formed in a curved shape, and thus partially surround the screw 10 as a whole. may be a curved block.

One or more bolt holes 115 may be formed in the sliding block 100. The bolt hole 115 is formed to bolt the sliding block 100 to the assembly frame 510 described later with reference to FIGS. 13 to 17. Therefore, of course, in an alternative embodiment, when fastening to the assembly frame 510 using another fastening method, the bolt hole 115 can be omitted.

In one embodiment, the sliding block 100 is formed with a plurality of module receiving portions 130 capable of accommodating the bearing module 200. In the illustrated embodiment, the module receiving portion 130 has a through-hole shape with a circular cross-section that penetrates the sliding block 100, and accommodates the module so that the bearing module 200 can be seated and coupled to the module receiving portion 130. A stepped portion 131 is formed within the portion 130. One or more bolt holes 132 may be formed in the step portion 131, and the bearing module 200 may be attached to the module receiving portion 130 of the sliding block 100 using a fastening bolt.

Figure 4 is a perspective view of the bearing module 200 according to one embodiment, and Figure 5 is an exploded perspective view of the bearing module 200. The bearing module 200 may be detachably attached to the sliding block 100. Referring to Figures 4 and 5, the bearing module 200 according to one embodiment includes a module body 210, a downward protrusion 220, and a main bearing 230. In the illustrated embodiment, the module body 210 has a substantially hemispherical shape and the lower protrusion 220 extends downward from the module body 210 to form a single piece. The shape of the module body 210 does not necessarily have to be hemispherical, but may be, for example, a cylinder or polygonal pillar.

One side of the lower protrusion 220 is an inclined surface 225 inclined at a predetermined angle to face downward, and a bearing connection hole 227 for coupling with the bearing 230 is formed on this inclined surface 225. The bearing 230 may be, for example, a radial bearing, and is rotatably attached to the connection hole 227 by a coupling means such as a bolt.

In one embodiment, the bearing module 230 is formed with one or more bolt holes 211 penetrating in the vertical direction, and this bolt hole 211 is a stepped portion ( It corresponds to the position of the bolt hole 132 formed in 131). Therefore, the bearing module 200 can be coupled to the sliding block 100 by inserting the bearing module 200 into the module receiving portion 130 and fastening the two bolt holes 211 and 132 with the fastening bolts 240.

At this time, the protrusion fitting groove 133 area is defined by the step 131 within the module receiving portion 130 of the sliding block, and the lower protrusion 220 of the bearing module 200 is inserted into the protrusion fitting groove 133. By inserting and fitting the bearing module 200 into the module receiving portion 130, the direction of the bearing module 200 can be fixed.

In one embodiment, when the bearing module 200 is inserted into the module receiving portion 130 and fastened, it may be fastened through a washer 250 and/or a spring (not shown). When fastening through the washer 250, not only can the fastening force be increased, but the fastening height of the bearing module 200 with respect to the sliding block 100 can be adjusted. This will be described later with reference to FIGS. 6 and 9.

Additionally, when the bearing module 200 is fastened to the sliding block 100 via a spring (not shown), the plurality of bearings 230 may be engaged with the thread of the screw 10 with a uniform preload. In general, machining errors may occur when processing the sliding block 100, bearing module 200, or screw 10, and all bearings 230 may not contact the surface of the screw 10 at exactly the same height. In this case, Since the load received is different for each bearing 230, it causes noise and vibration and shortens the life of the bearing 230. However, interposing a spring between the sliding block 100 and each bearing module 200 can reduce the load deviation of the bearing 230 due to processing errors, thereby reducing noise and vibration during operation of the sliding block 100. The life of the bearing 230 can be extended.

In one embodiment, a washer 250 and a spring (not shown) may be individually interposed between the sliding block 100 and the bearing module 200. Alternatively, a spring-shaped washer ('spring washer') may be inserted into the sliding block 100 and the bearing module 200. The spring washer may, for example, be in the form of a helical spring, or alternatively, it may be a disc-shaped washer with a wavy surface, as shown in Figure 5, or other known types of washers.

Figure 6 is a front view of the sliding block and schematically shows the sliding block 100 viewed from the screw axis direction (Z direction in Figure 1).

Referring to Figure 6, the sliding block 100 according to a preferred embodiment is an 'open type' sliding block. That is, when viewed from the front view of FIG. 6, the sliding block is not a closed type that completely surrounds the screw 10 at 360 degrees, but an open type that only partially surrounds the circumference of the screw 10. For example, in FIG. 6, the sliding block 100 surrounds the screw 10 at a predetermined angle θ1, and this angle θ1 may be, for example, 180 degrees or less.

Also, in one preferred embodiment, the sliding block 100 is a 'curved' block. The surfaces of the upper surface 110 and the lower surface 120 of the sliding block 100 are not flat, and the sliding block 100 is curved to surround the screw 10 as shown in FIG. 6. The upper surface 110 and the lower surface 120 of the sliding block 100 may be formed as curved surfaces, or a plurality of planes may be continuously bent to form an overall curved shape.

In the embodiment of Figure 6, the bearing 230 is in contact with the screw 10 in two radial directions (i.e., direction A and direction B) of the screw 10. For convenience of explanation, in FIG. 6, direction A is the direction passing from the central axis AX of the screw 10 through the contact point P1 of the first bearing 230a and the screw 10, and direction B is the direction between the screw 10 and the contact point P1. ) is the direction passing from the central axis (AX) of the second bearing (230b) and the contact point (P2) of the screw (10). Also, direction C represents the direction that bisects the sliding block 100. The bearing 230 is in contact with the surface of the screw 10 in the radial A and B directions of the screw 10, and the angle between the two directions is indicated as θ2. In one embodiment, the angle θ2 between directions A and B may be 120 degrees or less, and preferably may be between 45 degrees and 90 degrees.

In one embodiment, the center point according to the curvature of the upper surface 110 of the sliding block 100 and the central point according to the curvature of the lower surface 120 may coincide. That is, when referring to FIG. 6, the center points according to the respective curvatures of the upper surface 110 and the lower surface 120 of the sliding block 100 may coincide. Additionally, in one embodiment, this center point may coincide with the central axis AX of the screw 10. For example, when manufacturing the sliding block 100, the module receiving part 130 is formed with the penetration direction of the module receiving part 130 facing the center point, and the central axis AX of the screw 10 is formed as described above. It can be placed by matching the center point. In this way, if the central axis (AX) of the screw 10 and the center point according to the curvature of the upper and lower surfaces of the sliding block 100 are configured to match, not only is the manufacturing of the sliding block 100 simple, but the screw (10) ) It is possible to reduce noise and vibration during the sliding movement of the sliding block 100 along the line.

In one embodiment, bearing 230 has a larger diameter compared to screw 10. For example, the bearing 230 may have a diameter of 1.5 to 4 times the diameter of the screw 10. Therefore, as shown in Figure 6, the bearings 230a and 230b are arranged to partially overlap when viewed from the front, and as described with reference to Figures 1 to 3, a plurality of bearing modules 200 are arranged in a plurality of rows (see Figure 1). D1, D2, etc.) are arranged in a zigzag pattern and are coupled to the sliding block 100.

Figures 7 and 8 are diagrams illustrating the arrangement relationship between the bearing module and the screw according to an embodiment. Figure 7 is a side view of the bearing module 200 and the screw 10, and Figure 8 is a schematic top view of the bearing module 200 and the screw 10. It is expressed as

Referring to Figures 7 and 8, the screw 10 has a thread 11 having a predetermined pitch distance formed on the surface, and as shown, the thread 11 has inclined surfaces 11a and 11b in both directions from the lowest point of the thread. . The angle between the two inclined surfaces 11a and 11b of the screw bone is, for example, 90 degrees, but may vary depending on the type of screw.

The bearing 230 mounted on the front inclined surface 225 of the bearing module 200 is, for example, a wheel-shaped radial bearing, and the outer ring (outer peripheral surface) 230a of the bearing 230 contacts the screw bone 11, thereby forming the sliding block 100. ) is in close contact with the screw (10). In one embodiment, the bearing 230 may be seated in contact with one inclined surface 11a of the screw thread 11 to reduce friction and resulting vibration and noise. At this time, the outer peripheral surface (230a) of the bearing 230 is in line contact with the inclined surface (11a) of the screw bone at the contact point (P).

In one embodiment, it is preferable that the load by the bearing 230 is applied to the central axis AX of the screw 10. For this purpose, for example, as shown in FIG. 8, the bearing 230 is positioned at the point where the center line (L) bisecting the bearing module 200 to the left and right and the central axis (AX) of the screw 10 meet. The bearing module 200 can be arranged so that the contact point (P) in contact with (11) is located.

Figure 9 shows a front view of the sliding block 100 and screw 10' according to an alternative embodiment. Compared to Figure 6, it can be seen that the configuration of the sliding block 100 is the same and the diameter of the screw 10' in Figure 9 is larger than that of the screw 10 in Figure 6. Therefore, since the distance between the outer peripheral surface of the screw 10' and the lower surface 120 of the sliding block 100 has become closer, the bearing 230 and the bearing module 200 supporting it are radial from the screw central axis AX. It is desirable to move in a direction away from and be coupled to the sliding block 100. Accordingly, in Figure 9, compared to Figure 6, the first bearing module 200a and the second bearing module 200b move along the A direction and the B direction, respectively, and move slightly toward the upper surface 110 of the sliding block 100. It can be seen that it protrudes and is coupled to the sliding block 100.

In one embodiment, the washer 250 may be used to adjust the fastening height of the bearing module 200 to the sliding block 100. For example, in the case of Figure 6, if the bearing module 200 is fastened to the sliding block 100 through a washer 250 of a first thickness, in Figure 9, a washer 250 of a second thickness thicker than the first thickness is used. By using the bearing module 200, the bearing module 200 can be fastened to protrude further above the upper surface 110 of the sliding block 100.

Therefore, even when using screws (10, 10') of various diameters according to a specific embodiment of the present invention, the bearing module ( Since the fastening height of 200) can be adjusted, one sliding block 100 can be used for screws 10 and 10' of various sizes. In addition, even if the thickness of the washer 250 changes, the height of the bearing module 200 is adjusted along the radial direction (i.e., A direction and B direction) from the screw central axis (AX), so the load of the sliding block 100 is applied to the screw ( 10) can be delivered stably.

Figure 10 is a diagram explaining the tilt direction of a bearing according to one embodiment. Referring to Figure 10(a), the sliding block 100 is provided with three bearing modules 200, and the first to third bearings 230a, 230b, and 230c are in contact with the screw 10. At this time, the first to third bearings 230a to 230c are all installed inclined in the same direction (leftward in the drawing) and are in contact with one inclined surface 11a of the screw thread 11.

Figure 10(b) shows an alternative embodiment, in which the sliding block 100 is provided with three bearing modules 200a, 200b, and 200c, and at least some of the bearing modules are installed in opposite directions. For example, in the illustrated embodiment, the first and third bearings 230a and 230c are tilted to the left and come into contact with the first inclined surface 11a of the screw 10, and the second bearing 230b is tilted to the right to contact the screw 10. It will be understood that the second inclined surface 11b may be contacted.

Figure 11 schematically shows a method of manufacturing a sliding block according to an embodiment. When the sliding block 100 is configured as an open curved block as in the present invention, it can be easily processed from a cylinder or cylindrical member, which has the advantage of making processing easier and reducing processing time.

First, prepare the cylindrical member 300 shown in Figure 11(a). The cylindrical member 300 has an outer peripheral surface 310 and an inner peripheral surface 320 with a through hole 305 formed at the center in the longitudinal direction (Z direction). In one embodiment, a cylindrical base material may be used, and in this case, a through hole 305 may be formed in the center of the cylindrical base material to create a cylindrical member 300 as shown in FIG. 11(a).

Thereafter, the cylindrical member 300 is vertically cut along the longitudinal direction (Z direction) to form a member 400 (hereinafter referred to as a “semi-cylindrical member”) as shown in FIG. 11(b). In one embodiment, the semi-cylindrical member 400 may be formed by cutting the cylindrical member 300 in half by cutting it with a cutting surface that includes the diameter of the cylindrical member 300. Alternatively, it may be cut with any cutting edge that does not include diameter.

The outer peripheral surface 310 and the inner peripheral surface 320 of the cylindrical member 300 of FIG. 11 (a) became the outer peripheral surface 410 and the inner peripheral surface 420 of the semi-cylindrical member 400 of FIG. 11 (b), respectively. Afterwards, the semi-cylindrical member 400 is milled to produce the sliding member 100 as shown in FIG. 11(c). For example, the sliding block 100 can be manufactured by chamfering the edges of the semi-cylindrical member 400 and forming a plurality of module receiving portions 130 and bolt holes 115 and 132, etc. At this time, in one embodiment, as described with reference to FIG. 1, at least one column in each column (D1, D2) along at least two columns (D1, D2) parallel to the longitudinal direction of the sliding block 100 and spaced apart from each other. A bearing module receiving portion 130 may be formed. Additionally, as described with reference to FIG. 6 , the module receiving portion 130 may be formed by directing the penetration direction of the module receiving portion 130 toward the center point according to the curvature of the outer peripheral surface 410 or the inner peripheral surface 420.

As the sliding block 100 is processed from the semi-cylindrical member 400, the outer peripheral surface 410 and the inner peripheral surface 420 of the semi-cylindrical member 400 are respectively formed on the upper surface 110 and the lower surface ( 120). Additionally, the thickness (i.e., the distance between the upper surface 110 and the lower surface 120) of the sliding block 100 may be adjusted by processing the outer peripheral surface 410 or the inner peripheral surface 420 as necessary.

In this way, when manufacturing the sliding block 100 according to an embodiment of the present invention from a cylindrical base material or a cylindrical base material 300, the screw 10 does not need to be separately curved on the upper surface 110 and the lower surface 120. ) can be formed into a curved block that partially surrounds the block, making processing easy and processing time shortened.

Figure 12 is a diagram explaining various embodiments of sliding block shapes.

Figure 12(a) shows a front view of the sliding block 100 of Figure 11(c), and the first bearing 230a and the second bearing 230b are schematically shown with dotted lines. Since the sliding block 100 was manufactured from a cylindrical base material or a cylindrical base material 300, no separate processing was performed on the upper surface 110 and the lower surface 120, but a curved shape partially surrounding the screw 10 as shown. has

The direction extending the contact point between the surface of the first bearing 230a and the screw 10 from the central axis of the screw (AX) is direction A, and the second bearing 230b and the screw 10 from the central axis (AX) of the screw. If the direction in which the surface contact point is extended is called direction B, the module receiving portion 130 is formed so that direction A and direction B are at a predetermined angle (θ2). In addition, it is preferable that the module receiving portion 130 is configured so that the bearing module 200 moves along the A direction and the B direction, respectively, to adjust the attachment height of the bearing module 200 to the sliding block 100.

Figure 12(b) is a front view of the sliding block 100 according to an alternative embodiment, and as shown, the upper surface 110' may be further processed to form one or more flat surfaces. Additionally, although not shown in the drawing, additional processing may be performed on the lower surface 120 to form one or more flat surfaces.

The sliding block 100 of FIG. 12(c) is configured to surround the screw 10 more than that of FIGS. 12(a) and 12(b). In this case, the bearing module 200 can be arranged in three or more radial directions around the screw central axis (AX). For example, in Figure 12(c), the bearing module 200 can be mounted by forming the module receiving portion 130 in the A direction, B direction, and C direction, and thus the first to third bearings 230a and 230b. , 230c) may contact the surface of the screw 10 while heading toward the central axis AX of the screw 10 in different directions. At this time, the angle θ3 between directions A and B may be equal to or greater than the angle θ2 in Figure 12(a) and may be less than 180 degrees.

Now, with reference to FIGS. 13 to 17, the sliding block assembly including the sliding block 10 of the above-described embodiment will be described.

FIG. 13 is a perspective view of the sliding block assembly 500 and the rail assembly 600 according to an embodiment, and FIG. 14 is a perspective view of the sliding block assembly 500 viewed from below. 13 and 14, the sliding block assembly 500 according to one embodiment includes one or more sliding blocks 100 and is mounted on the rail assembly 600 to perform a sliding reciprocating movement by rotation of the screw 10. can do.

In the illustrated embodiment, the sliding block assembly (hereinafter simply referred to as 'block assembly') 500 includes two sliding blocks 100A and 100B arranged in series in the longitudinal direction of the screw 10. Each of the first sliding block 100A and the second sliding block 100B may have the same or similar configuration as the sliding block 100 described in FIGS. 1 to 12.

In one embodiment, the block assembly 500 includes a plate-shaped assembly frame 510, and the first and second sliding blocks 100A and 100B are aligned and mounted on the assembly frame 510 in the longitudinal direction. As shown in FIG. 14, a plurality of guide bearings 520 may be installed at the lower part of the block assembly 500. The guide bearing 520 is configured to engage with the guide rail 20 of the rail assembly 600, which will be described later, and to slide along the guide rail 20.

The bearings 230 of the bearing module 200 installed on the first sliding block 100A are installed inclined in the first direction of the longitudinal direction (Z direction) of the screw 10, and the bearing modules installed on the second sliding block 100B The bearings 230 of 200 are installed inclined in the second direction of the longitudinal direction (Z direction) of the screw 10. Therefore, the bearings 230 of the first sliding block 100A are supported while contacting the first inclined surface (for example, 11a) of the screw thread 11, and the bearings 230 of the second sliding block 100B are supported by the screw thread 11. It will be understood that it is supported while in contact with the second inclined surface (eg, 11b).

Figure 15 is an exploded perspective view showing the coupling relationship between the sliding blocks 100A and 100B and the assembly frame 510 in the sliding block assembly 500. Referring to Figure 15, the assembly frame 510 is provided with block receiving portions 511a and 511b that can accommodate the first and second sliding blocks 100A and 100B, respectively. The first block receiving portion 511a can at least partially accommodate and secure the first sliding block 100A, and the second block receiving portion 511b can at least partially accommodate and secure the second sliding block 100B. You can.

The assembly frame 510 includes one or more bolt holes 513 formed around the first and second block receiving portions 511a and 511b. Each of the bolt holes 513 is formed at a position corresponding to the bolt hole 115 of the sliding blocks 100A and 100B, and therefore the sliding blocks 100A and 100B are connected to the assembly frame 510 using the bolts 530. ) can be concluded.

In one embodiment, the assembly frame 510 may further include one or more adjustment bolt holes 515 formed at the front and rear, respectively. The adjustment bolt 540 passing through the adjustment bolt hole 515 is in contact with the front or rear of the sliding block (100A, 100B), and the insertion degree of the adjustment bolt 540 inserted into each adjustment bolt hole 515 is determined. By adjusting, the longitudinal (Z-direction) positions of the sliding blocks 100A and 100B with respect to the assembly frame 510 can be finely adjusted. For this purpose, for example, there is a gap within each block receiving portion (511a, 511b) so that the sliding blocks (100A, 100B) can move within a certain range in the longitudinal direction, and also the bolt hole (115) of the sliding block (100) ) and the bolt hole 513 of the assembly frame 510 may have a gap in the longitudinal direction by having, for example, a long hole-shaped cross section.

Therefore, the first sliding block (100A) is seated on the first block receiving portion (511a), the first sliding block (100A) is initially loosely fixed using the bolt 530, and then the adjustment bolt (540) is tightened. By adjusting the degree of insertion, the longitudinal position of the first sliding block 100A with respect to the assembly frame 510 is finely adjusted so that each bearing 230 of the sliding blocks 100A and 100B is aligned with the inclined surface of the screw thread 11. 11a or 11b) with an appropriate preload, and then completely fasten the bolts 530 to secure the sliding blocks 100A and 100B to the assembly frame 510.

According to this configuration of the present invention, by using the adjustment bolt 540 to finely adjust the sliding blocks 100A and 100B in the longitudinal direction, the bearing ( When the preload between the outer peripheral surface (230a) of 230) and the screw bone (11) is outside the appropriate range, it is possible to easily adjust the preload, so that the rotational movement of the screw (10) without power loss can be converted into a linear reciprocating movement of the block assembly (500). It can be converted to .

Figure 16 schematically shows a front view of a sliding block assembly and a rail assembly according to one embodiment. Referring to Figure 16, the screw 10 is rotatably supported on the frame 610 of the rail assembly 600. For example, the frame 610 may be provided with a support portion (not shown) that rotatably supports both ends of the screw 10, and one end of the screw 10 may be coupled to a drive motor (not shown) to rotate.

Guide rails 20 may be arranged in the longitudinal direction on both sides of the frame 610 in the width direction. The guide rail 20 may be engaged with the guide bearing 520 installed at the lower part of the block assembly 500, thereby allowing the block assembly 500 to slide in the longitudinal direction while being firmly coupled to the rail assembly 600. You can.

A support bearing 30 may be installed below the screw 10, which contacts the screw 10 and supports the screw. The support bearing 30 is configured to contact and support the screw 10 in an area around the outer peripheral surface of the screw 10 that does not interfere with the main bearing 230, and thus does not interfere with the movement of the block assembly 500.

One or more support bearings 30 may be installed along the longitudinal direction of the screw 10. For example, it can be installed at regular intervals along the longitudinal direction of the screw (10), and even if the length of the screw (10) becomes longer, support bearings (30) can be installed at regular intervals to prevent the screw (10) from bending. There is an advantage that there is no limit to the length of (10).

Figure 17 is a front view of a sliding block assembly and rail assembly according to an alternative embodiment. In the alternative embodiment of Figure 17, the block assembly 500' and rail assembly 600' used an LM guide structure instead of the guide rail (20 in Figure 16) and guide bearing (520 in Figure 16). For example, in Figure 17, the block assembly 500' is provided with one or more LM guides 550 on both sides of the lower part in the width direction, and the rail assembly 600' includes one or more LM guide rails engaged with each LM guide 550. (620) may be provided. As such, it will be understood that the rail assemblies 600 and 600' can guide the block assemblies 500 and 500' using one of several known guide methods as shown in FIGS. 16 and 17.

As described above, those of ordinary skill in the field to which the present invention pertains can understand that various modifications and variations are possible from the description of this specification. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the claims and equivalents thereof as well as the claims described later.

10: screw 20: guide rail
30: Support bearing
100: sliding block 130: module receiving portion
200: bearing module 230: bearing
250: Washer
300: cylindrical member 400: semi-cylindrical member
500: sliding block assembly 600: rail assembly

Claims (6)

A sliding block that reciprocates linearly in the longitudinal direction of the screw by rotation of the screw,
The sliding block is an open block of a curved shape configured to surround at least a portion of the screw, but does not surround the entire circumference of the screw, and the sliding block includes:
a plurality of bearing modules (200) each having one main bearing (230) in contact with an inclined surface of the thread of the screw and each being detachably fastened to the sliding block; and
Provided with a fastening bolt 240 for fastening each bearing module 200 to the sliding block,
The main bearings of the plurality of bearing modules are installed inclined in the first direction of the screw longitudinal direction and are configured to contact the first inclined surface of the screw bone of the screw,
The plurality of bearing modules 200 are arranged in a zigzag manner while being alternately positioned along two rows (D1, D2) parallel to the longitudinal direction of the screw and spaced apart from each other, so that the main bearings 230 of the plurality of bearing modules are aligned with the screw. It is configured to contact the screw in two radial directions (direction A and direction B), and the angle (θ2) between the two radial directions is 45 to 90 degrees,
The sliding block is provided with a module receiving portion 130 capable of accommodating each bearing module 200, and inside each module receiving portion 130, the bearing module 200 is seated and coupled to the module receiving portion 130. A stepped portion 131 is formed to enable this, and the bearing module 200 is fastened to the stepped portion 131 using the fastening bolt 240 to fasten the bearing module to the sliding block,
A washer 250 of a first thickness or a second thickness may be interposed between each bearing module 200 and the step portion 131, and the washer 250 of the first thickness or the second thickness may be used depending on the diameter size of the screw. An open sliding block, characterized in that the washers are selected and configured to be interposed. delete According to claim 1,
An open sliding block, characterized in that the sliding block is configured to surround a circumference of less than 180 degrees of the screw. According to claim 1,
Each bearing module 230 is provided with a bolt hole 211 formed corresponding to the position of the bolt hole 132 formed in the step portion 131,
An open sliding block, wherein the bearing module is coupled to the sliding block by fastening the fastening bolt (240) through the bolt hole (211, 132). According to claim 1,
An open sliding block, characterized in that each of the upper surface 110 and the lower surface 120 of the sliding block is formed as a curved surface or is formed by continuously bending a plurality of planes.
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