Linear transmission mechanism sensing device

Abstract

A sensing device for a linear transmission mechanism is provided. [Solution] The sensing device 10 comprises a fixed base and a protective base 30. The fixed base is fixed to the linear transmission mechanism. The protective base has a sensor that abuts against the linear transmission mechanism and a magnetic unit that is attracted to the linear transmission mechanism inside. The protective base also has a side fitting groove 36 and a second fixing hole that is connected to the side fitting groove. The protective base is attached to the fixed base via the side fitting groove. The protective base and fixed base are detachably fixed together by the fixing unit. Due to the above structural features, the protective base, sensor, and magnetic unit can be removed from the fixed base as a whole by simply removing the fixing unit without removing the fixed base, allowing for maintenance and replacement of the sensor.

Description

[Technical Field]

[0001] The present invention relates to a linear transmission mechanism, and more particularly to a sensing device for a linear transmission mechanism. [Background technology]

[0002] In Patent Document 1, the sensor is fastened to the stand with a screw. The stand is fastened to the outer end face of the nut with a screw while separating the sensor from the nut, so the sensor does not come into direct contact with the nut, and data related to the nut during operation cannot be reliably detected, resulting in a decrease in detection accuracy.

[0003] In Patent Document 2, the sensor is attached to the mounting member with four screws. Next, attach the mounting member to the nut using two fastening bolts to complete the sensor installation process. However, since the mounting member separates the sensor from the nut, the sensor does not come into direct contact with the nut, and data relating to the nut during operation cannot be reliably detected, resulting in reduced detection accuracy. On the other hand, maintenance of the sensor requires removing four screws, which is not only time-consuming but also makes it difficult to carry out maintenance work smoothly. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-148888 [Patent Document 2] Patent No. 7412152 Summary of the Invention [Problem to be solved by the invention]

[0005] The main object of the present invention is to provide a sensing device for a linear transmission mechanism that has good detection accuracy and is easy to maintain. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the sensing device comprises a fixed base, a protective base, a fixed unit, a sensor, and a magnetic unit. The fixed base is fixed to the linear transmission mechanism and has a first fixing hole. The protective base has a side fitting groove and a second fixing hole connected to the side fitting groove. The protective base is removably attached to the fixed base via the side fitting groove. The protective base further has a sensor mounting groove and a magnetic unit mounting groove adjacent to the sensor mounting groove. The fixing unit is removably attached to the first fixing hole of the fixed base and the second fixing hole of the protective base to fix the protective base to the fixed base. The sensor is disposed in the sensor mounting groove of the protective base and abuts against the linear transmission mechanism to detect data related to the linear transmission mechanism during operation. The magnetic unit is disposed in the magnetic unit mounting groove of the protective base and is attracted to the linear transmission mechanism.

[0007] In detail, in the sensing device of the present invention, the protective base, sensor and magnetic unit can be removed together from the fixed base by removing the fixing unit without removing the fixing base, allowing maintenance and replacement of the sensor. The sensing device of the present invention is attached to the linear transmission mechanism by a magnetic unit, making it easy to attach and detach. Furthermore, the sensor of the sensing device of the present invention is in secure contact with the linear transmission mechanism, preventing other components from interfering with the sensor and linear transmission mechanism, thereby improving detection accuracy.

[0008] In one embodiment of the present invention, the fixed base has a first fixed portion and a second fixed portion. The first fixing part has a first fixing hole, and the second fixing part is connected to the first fixing part to fix the linear transmission mechanism. The protective base is detachably attached to the second fixing portion of the fixing base along the radial direction of the first fixing hole of the fixing base via the side fitting groove.

[0009] In one embodiment of the present invention, the protective base has an inner surface facing the linear transmission mechanism. The sensor protrudes from the inner surface of the protective base and comes into close contact with the linear transmission mechanism. Furthermore, it is preferable that the height of the sensor projecting from the inner surface be 0.2 mm to 0.5 mm.

[0010] In one embodiment of the present invention, the protective base has an outer surface facing away from the linear transmission mechanism, and the outer surface has a receiving groove connected to the second fixing hole. The stationary unit has a head and a shaft. The head portion of the fixed unit is stored in a storage groove in the protective base. The shaft of the fixing unit is connected to the head portion and is inserted into the first fixing hole of the fixing base and the second fixing hole of the protective base to be in close contact with each other. Due to the above-mentioned structural features, the protective base, the sensor and the magnetic unit can be removed together from the fixed base by pulling out the fixed unit.

[0011] In one embodiment of the present invention, the protective base has an end wall, two side walls and a side fitting groove. Two side walls are connected relative to the end wall, one side wall having a first bore hole and the other side wall having a first screw hole. The fixing unit has a head portion and a threaded portion. The screw portion of the fixing unit is connected to the head portion and passes through the first bore and the first fixing hole of the fixing base and is fastened to the first screw hole. Due to the structural features described above, the protective base, sensor and magnetic unit can be removed from the fixing base together by loosening the fixing unit with a screwdriver.

[0012] In one embodiment of the present invention, the protective base further comprises a second drill hole and a second screw hole. The second bore hole is connected to the magnetic unit mounting groove. The second screw hole is connected to the magnetic unit mounting groove and the sensor mounting groove. The fastening bolt passes through the second bore hole and is fastened to the second screw hole, and the end of the fastening bolt abuts against the sensor, thereby stabilizing the sensor in the sensor mounting groove.

[0013] In one embodiment of the present invention, the protective base further includes a dust-proof part. Dustproof parts are placed around the sensor to prevent external disturbances from affecting sensing accuracy.

[0014] In one embodiment of the present invention, the second fixing portion of the fixing base has a fastening hole. By inserting the screw into the fastening hole and fastening it to the linear transmission mechanism, the second fixing portion of the fixing base is fixed to the linear transmission mechanism.

[0015] The detailed structure, features, assembly and use of the linear transmission mechanism sensor of the present invention will be made clear through the detailed description of the following embodiments. Furthermore, it should be understood by those with common sense in the field of the present invention that the following detailed description and the embodiments presented by the present invention are merely examples for explaining the present invention and cannot limit the scope of the claims of the present invention. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a state in which a sensing device according to a first embodiment of the present invention is mounted on a ball screw; [Figure 2] 1 is a perspective view of a sensing device according to a first embodiment of the present invention; [Figure 3] 1 is an exploded perspective view of a sensing device according to a first embodiment of the present invention; [Figure 4] 1 is a cross-sectional view of a sensing device according to a first embodiment of the present invention; [Figure 5] 1 is a perspective view showing a state in which the protective base of the sensing device according to the first embodiment of the present invention is removed from the fixed base; FIG. [Figure 6] 1 is a perspective view showing a state in which a sensing device according to a first embodiment of the present invention is mounted on a linear transmission mechanism; [Figure 7] 10 is a perspective view showing a state in which a sensing device according to a second embodiment of the present invention is mounted on a single-axis robot; FIG. [Figure 8] FIG. 10 is a top perspective view of a sensing device according to a second embodiment of the present invention. [Figure 9] FIG. 10 is an exploded perspective view of a sensing device according to a second embodiment of the present invention. [Figure 10] 10 is a cross-sectional view of a sensing device according to a second embodiment of the present invention. [Figure 11] 10 is a bottom perspective view of a sensing device with a dustproof part installed according to a second embodiment of the present invention; FIG. [Figure 12] FIG. 10 is a perspective view of a sensing device according to a third embodiment of the present invention. [Figure 13] FIG. 10 is an exploded perspective view of a sensing device according to a third embodiment of the present invention. [Figure 14] 10 is a cross-sectional view of a sensing device according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The linear transmission mechanism sensor of the present invention will be described below with reference to the drawings. In the specification and drawings, nouns indicating directionality are expressed based on the direction in the drawings. The same reference numerals indicate structural features of the same or similar parts.

[0018] (First embodiment) As shown in FIG. 1, the linear transmission mechanism 1 is composed of a ball screw and has a moving unit 2. The moving unit 2 is made up of a nut and is fixed to the mounting base 4 so that it can reciprocate along the ball screw 5 .

[0019] As shown in FIGS. 2 and 3, the sensing device 10 according to the first embodiment includes a fixed base 20, a protective base 30, a fixed unit 40, a sensor 50 and two magnetic members 60.

[0020] The fixed base 20 has a first fixed portion 21 and a second fixed portion 25 . The first fixing portion 21 is divided into a first straight portion 22 and a first curved portion 23 . The first linear section 22 has first perforations 24 extending through its top and bottom surfaces. The first curved portion 23 is connected to the side of the first straight portion 22 . The second fastening portion 25 is divided into a second straight section 26 and a second curved section 27 . The second linear section 26 has fastening holes 28 extending through the top and bottom surfaces. The second curved portion 27 is connected between the first straight portion 22 and the second straight portion 26 to create a height difference between the first straight portion 22 and the second straight portion 26 .

[0021] When attaching the sensing device 10 to the linear transmission mechanism 1, as shown in Figure 1, the hexagon socket bolt 6 is inserted into the fastening hole 28 of the second fixing portion 25 of the fixed base 20 and tightened into one of the screw holes (not shown in the figure) of the moving unit 2, thereby fixing the second fixing portion 25 of the fixed base 20 to the surface 3 of the moving unit 2. In detail, since the end face of the mobile unit 2 originally has a plurality of screw holes corresponding to the mounting base 4, when fixing the fixing base 20 of the sensing device 10 to the mobile unit 2, it is not necessary to add extra screw holes to the end face of the mobile unit 2, which not only reduces manufacturing costs but also improves convenience when attaching the sensing device 10 to the mobile unit 2.

[0022] The protective base 30 has a sensor mounting groove 34, two magnetic unit mounting grooves 35, side edge fitting grooves 36 penetrating both left and right sides, a storage groove 37 and two second fixing holes 38. The sensor mounting groove 34 has a T-shaped cross section. The two magnetic unit mounting grooves 35 have a circular cross section. The two magnetic unit mounting grooves 35 are arranged on opposite sides of the sensor mounting groove 34 . The sensor mounting groove 34 and the two magnetic unit mounting grooves 35 extend from one end surface 31 of the protective base 30 to the interior and are exposed on the inner surface 32 of the protective base 30 (i.e., the surface facing the mobile unit 2). The shape of the side fitting groove 36 corresponds to the shape of the first fixing portion 21 of the fixing base 20 . As shown in FIGS. 3 and 4, the storage groove 37 is disposed on the outer surface 33 of the protective base 30 (i.e., the surface facing away from the moving unit 2). The two second fixing holes 38 are arranged relative to each other above and below. The upper second fixing hole 38 is connected to the storage groove 37 and the side fitting groove 36 . The lower second fixing hole 38 is connected to the side fitting groove 36 and the sensor mounting groove 34 .

[0023] When attaching the protective base 30 to the fixed base 20, as shown in Figures 2 and 3, the side edge fitting groove 36 of the protective base 30 fits into the first fixing portion 21 of the fixed base 20 along the radial direction of the first fixing hole 24 of the fixed base 20. The two second fixing holes 38 of the protective base 30 are connected to the opposite ends of the first fixing holes 24 of the fixing base 20 .

[0024] In the first embodiment, the fixing unit 40 has a head portion 41 and a shaft 42. The shaft 42 is connected to the head portion 41. When performing assembly work, as shown in Figures 3 and 4, the head portion 41 of the fixing unit 40 is stored in the storage groove 37 of the protective base 30, and the shaft 42 of the fixing unit 40 is inserted into the two second fixing holes 38 of the protective base 30 and the first fixing hole 24 of the fixing base 20 and brought into close contact, thereby fixing the protective base 30 to the first fixing portion 21 of the fixing base 20.

[0025] The sensor 50 includes a housing 51 , a sensing unit 52 , a plurality of wires (not shown), and a sleeve 53 . The sensing unit 52 is disposed within the housing 51 . A number of wires are inserted into the housing 51 and connected to the sensing unit 52 . A sleeve 53 covers the wires. The housing 51 and the sensor mounting groove 34 have corresponding cross-sectional shapes. When assembling, the housing 51 of the sensor 50 is fitted into the sensor mounting groove 34 of the protective base 30 as shown in FIGS. After the assembly process is completed, as shown in FIG. 4, the height H of the housing 51 protruding from the inner surface 32 of the protective base 30 is 0.2 mm to 0.5 mm, so that the sensor 50 can contact the surface 3 of the mobile unit 2 and accurately detect data such as temperature, vibration, sound, and pressure related to the mobile unit 2 during operation.

[0026] In the first embodiment, each of the two magnetic members 60 has two magnetic units 62 that abut against each other, but this is not limiting and the number of magnetic units may be at least one. The magnetic unit 62 and the magnetic unit mounting groove 35 have corresponding cross-sectional shapes, so that the magnetic member 60 can be mounted in the magnetic unit mounting groove 35 of the protective base 30 and attached to the surface 3 of the moving unit 2 . The magnetic unit 62 is a magnet, but is not limited to this and may be made of a magnetic material.

[0027] To summarize the above, in the sensing device 10 according to the first embodiment, the sensor 50 is in close contact with the surface 3 of the mobile unit 2, which prevents other components from interfering with the sensor 50 and the mobile unit 2 and improves detection accuracy. As shown in Figure 5, when performing maintenance or replacement of the sensor 50, by pulling out the fixing unit 40 without removing the fixing base 20, the protective base 30, sensor 50 and magnetic unit 62 can be removed together from the fixing base 20 along the radial direction of the first fixing hole 24, and maintenance or replacement of the sensor 50 can be performed. In other words, the present invention can improve the convenience of maintenance. Furthermore, the protective base 30 is attached to the surface 3 of the moving unit 2 by the magnetic unit 62, making it easy to attach and detach.

[0028] The linear transmission mechanism 1 is not limited to a ball screw as shown in FIG. 1, but may be a linear rail as shown in FIG. As shown in FIG. 6, when the sensing device 10 is mounted on a linear rail, the second fixing portion 25 of the fixing base 20 is fastened to the moving unit 2 made of a block. The attachment / detachment method and the achieved effects are the same as those of the first embodiment, so a description thereof will be omitted.

[0029] (Second embodiment) As shown in FIG. 7, in order to accommodate different types of linear transmission mechanisms 1 (i.e., single-axis robots), the fixed base 70 and the protective base 80 of the sensing device 12 according to the second embodiment of the present invention are rectangular in shape. The fixed base 70 is fixed to the bearing seat 7 at one end of the single-axis robot. In other words, this invention can be used not only with ball screws but also with linear rails. In the second embodiment, as shown in FIGS. 8 and 9, the protective base 80 has only one magnetic unit mounting groove 82. In contrast, there is only one magnetic member 60. The sensor mounting groove 81 has a circular cross-sectional shape to accommodate different types of sensors 50 . As shown in FIGS. 9 and 10, the side fitting groove 83 penetrates one side surface of the protective base 80 . The protective base 80 is fitted into the first fixing portion 71 of the fixing base 70 along a single direction. In the second embodiment, dustproof parts 84 can be added according to actual needs. As shown in FIG. 11, the dustproof part 84 has a rectangular housing 85 and two paddings 86 . The rectangular housing 85 is disposed so as to cover the outer periphery of the protective base 80 and the magnetic member 60 of the sensor 50 . The two pads 86 shield the opening of the sensor mounting groove 81 and the opening of the magnetic unit mounting groove 82, thereby preventing external interference from affecting the sensing accuracy of the sensor 50. The structures and mounting methods of the other components (ie, the fixed unit 40, the sensor 60, and the magnetic member 60) and the effects achieved by combining them with the linear transmission mechanism 1 are the same as those in the first embodiment, and therefore will not be described here.

[0030] (Third embodiment) As shown in FIGS. 12 to 14, the difference between the sensing device 14 according to the third embodiment of the present invention and the sensing device 12 according to the second embodiment is the manner in which the fixed base 90 and the protective base 100 are attached and detached.

[0031] In the third embodiment, a first fixing portion 91 of a fixing base 90 has a cylindrical shape and includes a first fixing hole 92 . The second fixing portion 93 of the fixing base 90 can be formed in a ring shape according to actual needs.

[0032] The protective base 100 has an end wall 101 , two side walls 103 and a side fitting groove 105 . The end wall 101 is formed to protrude from one side of the protective base 100 . Two side walls 103 are connected relative to the end wall 101 , one side wall 103 having a first bore hole 102 and the other side wall 103 having a first screw hole 104 . The side fitting grooves 105 are formed between the end wall 101 and the two side walls 103 . As shown in FIGS. 12 and 13, the protective base 100 has a second bore hole 108 and a second screw hole 109 at one end remote from the side fitting groove 105 . The second perforation 108 is connected perpendicularly to the magnetic unit mounting groove 106 . The second screw hole 109 is connected perpendicularly to the magnetic unit mounting groove 106 and the sensor mounting groove 107 . The fastening bolt 110 passes through the second bore hole 108 and is tightened into the second screw hole 109 , and the end of the fastening bolt 110 abuts against the sleeve 53 of the sensor 50 , thereby stabilizing the sensor 50 within the sensor mounting groove 107 .

[0033] In the third embodiment, the fixing unit 43 is a bolt having a head portion 44 and a thread portion 45 . The threaded portion 45 is connected to the head portion 44 . When assembling, the side fitting groove 105 of the protective base 100 is fitted into the first fixing portion 91 of the fixing base 90 along the radial direction of the first fixing hole 92 . Next, the screw portion 45 of the fixing unit 43 is inserted into the first bore hole 102 and the first fixing hole 92 of the fixing base 90 and tightened into the first screw hole 104, whereby the protective base 100 is fixed to the first fixing portion 91 of the fixing base 90.

[0034] In detail, in the third embodiment, when performing maintenance and replacement of the sensor 50, the protective base 100, the sensor 50 and the magnetic member 60 can be removed together from the fixed base 90 along the radial direction of the first fixed hole 92 by loosening the fixing unit 43 with a screwdriver. Subsequently, by loosening and removing the fastening bolt 101 with a screwdriver, maintenance and replacement of the sensor 50 can be performed without removing the fixing base 90. In other words, the present invention can improve the convenience of maintenance. [Explanation of symbols]

[0035] 1: Linear transmission mechanism 2: Mobile unit 3: Surface 4: Mounting base 5: Screw shaft 6: Hexagon socket head bolt 7: Bearing seat 10, 12, 14: Sensing device 20: Fixed base 21:First fixed part 22: First straight line part 23: First curved area 24:First fixing hole 25:Second fixed part 26:Second straight line part 27: Second curved area 28: Fastening hole 30: Protective base 31: End face 32: Inner surface 33:Outer surface 34:Sensor mounting groove 35: Magnetic unit mounting groove 36: Side fitting groove 37: Storage groove 38:Second fixing hole 40: Fixed unit 41: Head 42: Shaft 43: Fixed unit 44: Head 45:Threaded part 50: Sensor 51: Housing 52: Sensing unit 53: Sleeve 60: Magnetic member 62: Magnetic unit 70: Fixed base 71:First fixed part 80: Protective base 81: Sensor mounting groove 82: Magnetic unit mounting groove 83: Side fitting groove 84: Dustproof parts 85: Cabinet 86: Stuffing 90: Fixed base 91:First fixed part 92:Second fixing hole 93:Second fixed part 100: Protective base 101: End wall 102:First perforation 103: Side wall 104: First screw hole 105: Side fitting groove 106: Magnetic unit mounting groove 107: Sensor mounting groove 108:Second perforation 109: Second screw hole 110: Fastening bolt H: Height

Claims

1. The device comprises a fixed base, a protective base, a fixed unit, a sensor and a magnetic unit; the fixed base is fixed to the linear transmission mechanism and has a first fixing hole; the protective base has a side fitting groove and a second fixing hole connected to the side fitting groove; the protective base is detachably attached to the fixed base via the side edge fitting groove; the protective base further has a sensor mounting groove and a magnetic unit mounting groove in contact with the sensor mounting groove, the fixing unit is detachably attached to the first fixing hole of the fixing base and the second fixing hole of the protective base to fix the protective base to the fixing base; The sensor is disposed in the sensor mounting groove of the protective base and simultaneously contacts the linear transmission mechanism; The magnetic unit is disposed in the magnetic unit mounting groove of the protective base and is attached to the linear transmission mechanism.

2. the fixed base has a first fixed portion and a second fixed portion, the first fixed portion has the first fixed hole, and the second fixed portion is connected to the first fixed portion to fix the linear transmission mechanism; 2. The sensing device for a linear transmission mechanism as described in claim 1, wherein the protective base is detachably attached to the second fixed portion of the fixed base along the radial direction of the first fixed hole of the fixed base through the side edge fitting groove.

3. the protective base has an inner surface facing the linear transmission mechanism; 2. The sensing device for a linear transmission mechanism according to claim 1, wherein the sensor protrudes from the inner surface of the protective base to a height of 0.2 mm to 0.5 mm.

4. the protective base has an outer surface facing away from the linear transmission mechanism, and the outer surface has a storage groove connected to the second fixing hole; A sensing device for a linear transmission mechanism described in any one of claims 1 to 3, characterized in that the fixing unit has a head portion and a shaft, the head portion of the fixing unit is stored in the storage groove of the protective base, and the shaft of the fixing unit is connected to the head portion and is inserted into the first fixing hole of the fixing base and the second fixing hole of the protective base and is tightly fitted.

5. the protective base has an end wall, two side walls and the side edge fitting groove, the two side walls are connected relatively to the end wall, one of the side walls has a first perforation, the other one of the side walls has a first screw hole, and the side edge fitting groove is formed by being surrounded by the end wall and the two side walls; 4. A sensing device for a linear transmission mechanism as described in any one of claims 1 to 3, characterized in that the fixing unit has a head portion and a threaded portion, the threaded portion of the fixing unit is connected to the head portion and passes through the first borehole and the first fixing hole of the fixing base and is tightened into the first screw hole.

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