Sensing device for a linear transmission mechanism

Abstract

The utility model provides a sensing device for linear transmission mechanism contains a fixed base and a protection seat. The fixed base is fixed to a linear transmission mechanism, a sensor abutting against the linear transmission mechanism and a magnetic element adsorbing the linear transmission mechanism are arranged in the protection seat, the protection seat has a lateral embedding groove and a second fixed hole communicated with the lateral embedding groove, the protection seat is arranged in the fixed base through the lateral embedding groove, and the protection seat and the fixed base are fixed together in a detachable mode through a fixing piece. Therefore, the sensing device provided by the utility model can be detached from the fixed base together with the sensor and the magnetic element by only detaching the fixing piece without detaching the fixed base, so that the sensor can be maintained and replaced.

Description

Technical Field

[0001] This utility model relates to the field of linear transmission mechanism technology, and more particularly to a sensing device for linear transmission mechanisms. Background Technology

[0002] The solution disclosed in JP 2022-148888 A involves mounting the sensor to a bracket using screws, and then mounting the bracket to the outer end face of the nut using screws. However, in the aforementioned patent, the sensor and the nut are separated by the bracket, preventing the sensor from directly contacting the nut. This results in the sensor being unable to accurately measure the relevant data of the nut during operation, thus affecting the sensing accuracy.

[0003] The solution disclosed in JP 007412152 first uses four mounting screws to install the sensor onto the mounting component, and then uses two fastening screws to install the mounting component onto the nut, thus completing the sensor installation. However, in the aforementioned patent, the sensor and the nut are separated by the mounting component, so the sensor does not directly contact the nut. This results in the sensor being unable to accurately measure the relevant data of the nut during operation, thus affecting the sensing accuracy. In addition, if the sensor needs to be repaired, all four mounting screws must be removed one by one, which is not only time-consuming but also easily causes inconvenience in maintenance. Utility Model Content

[0004] The main objective of this invention is to provide a sensing device for linear transmission mechanisms, which has good sensing accuracy and is easy to maintain and replace.

[0005] To achieve the aforementioned main objectives, the sensing device provided by this utility model includes a fixed base, a protective base, a fixing member, a sensor, and a magnetic element. The fixed base is fixed to a linear transmission mechanism and has a first fixing hole. The protective base has a lateral groove and a second fixing hole communicating with the lateral groove. The protective base is detachably mounted to the fixed base via the lateral groove. Furthermore, the protective base has a sensor mounting groove and a magnetic element mounting groove adjacent to the sensor mounting groove. The fixing member is detachably mounted in the first fixing hole of the fixed base and the second fixing hole of the protective base, for fixing 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, for sensing relevant data of the linear transmission mechanism during operation. The magnetic element is disposed in the magnetic element mounting groove of the protective base, for attracting the linear transmission mechanism.

[0006] As described above, the sensing device of this invention allows for easy removal of the protective base, sensor, and magnetic element from the mounting base without disassembling the mounting bracket; simply by removing the fixing member, the sensor can be easily removed for maintenance or replacement. Secondly, the sensing device utilizes the magnetic element to adhere to the linear transmission mechanism, making installation and removal quite convenient. Furthermore, the sensing device ensures that the sensor directly contacts the linear transmission mechanism, preventing interference from other components and thus improving sensing accuracy.

[0007] In an embodiment of the present invention, the fixing seat has a first fixing part and a second fixing part connected to the first fixing part. The first fixing part has the first fixing hole, and the second fixing part is used to fix to the linear transmission mechanism. The protective seat is detachably provided on the second fixing part of the fixing seat along the radial direction of the first fixing hole of the fixing seat by the lateral groove.

[0008] In an embodiment of this invention, the protective base has an inner surface facing the linear transmission mechanism, and the sensor protrudes from the inner surface of the protective base to ensure that the sensor can be tightly abutted against the linear transmission mechanism. More preferably, the height of the sensor protruding from the inner surface is 0.2mm to 0.5mm.

[0009] In an embodiment of this utility model, the protective base has an outer surface facing away from the linear transmission mechanism, and the outer surface has a receiving groove communicating with the second fixing hole; the fixing member has a head and a body connecting the head, the head of the fixing member is received in the receiving groove of the protective base, and the body of the fixing member is tightly fitted through the first fixing hole and the second fixing hole of the fixing base. Thus, by applying force to pull up the fixing member, the protective base, along with the sensor and the magnetic element, can be removed from the fixing base.

[0010] In an embodiment of this utility model, the protective base has an end wall and two side walls opposite to the end wall, forming a lateral groove between the end wall and the side walls. One side wall has a first through hole, and the other side wall has a first threaded hole. The fixing member has a head and a threaded portion connecting to the head. The threaded portion of the fixing member passes through the first through hole and the first fixing hole of the fixing base and is screwed into the first threaded hole. Thus, the protective base, along with the sensor and the magnetic element, can be removed from the fixing base by simply unscrewing the fixing member with a screwdriver.

[0011] In an embodiment of this utility model, the protective base further includes a second through hole communicating with the magnetic element mounting slot and a second screw hole communicating with the magnetic element mounting slot and the sensor mounting slot. A tightening screw passes through the second through hole and is screwed into the second screw hole, with its end abutting against the sensor, thereby positioning the sensor in the sensor mounting slot.

[0012] In an embodiment of this utility model, the protective base is further provided with a dustproof accessory, which is located around the sensor to prevent external factors from interfering with the sensor's sensing accuracy.

[0013] In an embodiment of this utility model, the second fixing part of the fixing base has a locking hole, and a screw passes through the locking hole and is screwed onto the linear transmission mechanism, so that the second fixing part of the fixing base is fixed to the linear transmission mechanism.

[0014] Detailed construction, features, assembly, and usage of the sensing device for linear transmission mechanisms provided by this invention will be described in the subsequent detailed description of embodiments. However, those skilled in the art will understand that these detailed descriptions and the specific embodiments listed for implementing this invention are merely illustrative and not intended to limit the scope of this patent application. Attached Figure Description

[0015] Figure 1 This is a perspective view of the sensing device installed on the ball screw according to the first embodiment of the present invention;

[0016] Figure 2 This is a perspective view of the sensing device according to the first embodiment of the present invention;

[0017] Figure 3 This is an exploded perspective view of the sensing device according to the first embodiment of the present invention;

[0018] Figure 4 This is a cross-sectional view of the sensing device according to the first embodiment of the present invention;

[0019] Figure 5 Similar Figure 1 This mainly shows the status of the protective seat after it has been removed from the fixed seat;

[0020] Figure 6 This is a perspective view of the sensing device of the first embodiment of the present invention mounted on a linear slide rail;

[0021] Figure 7 A perspective view of the sensing device of the second embodiment of this utility model installed on a single-axis robot;

[0022] Figure 8 This is a top perspective view of the sensing device according to the second embodiment of the present invention;

[0023] Figure 9 This is an exploded perspective view of the sensing device according to the second embodiment of the present invention;

[0024] Figure 10 This is a cross-sectional view of the sensing device according to the second embodiment of the present invention;

[0025] Figure 11 A bottom perspective view of the sensing device of the second embodiment of the present invention with dustproof accessories installed;

[0026] Figure 12 This is a perspective view of the sensing device according to the third embodiment of the present invention;

[0027] Figure 13 This is an exploded perspective view of the sensing device according to the third embodiment of the present invention;

[0028] Figure 14 This is a cross-sectional view of the sensing device according to the third embodiment of the present invention.

[0029] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0030] 1-Linear transmission mechanism;

[0031] 2-Moving parts;

[0032] 3-Surface;

[0033] 4-Bearing base;

[0034] 5-Screw shaft;

[0035] 6-Hex socket head cap screw;

[0036] 7-Bearing housing;

[0037] 10 - Sensing device;

[0038] 12-Sensing device;

[0039] 14-Sensing device;

[0040] 20-Fixed base;

[0041] 21-First fixing part;

[0042] 22-First straight section;

[0043] 23 - First bend;

[0044] 24 - First fixing hole;

[0045] 25 - Second fixing part;

[0046] 26 - Second straight section;

[0047] 27 - Second bend;

[0048] 28-Locking hole;

[0049] 30 - Protective base;

[0050] 31-End face;

[0051] 32 - Inner surface;

[0052] 33 - Outer surface;

[0053] 34 - Sensor mounting slot;

[0054] 35 - Magnetic component mounting slot;

[0055] 36- Lateral groove;

[0056] 37-Container;

[0057] 38 - Second fixing hole;

[0058] 40 - Fastener;

[0059] 41-Head;

[0060] 42-Body;

[0061] 43-Factor;

[0062] 44-Head;

[0063] 45 - Threaded section;

[0064] 50-sensor;

[0065] 51 - Outer shell;

[0066] 52-Sensing element;

[0067] 53 - Sheath;

[0068] H - Height;

[0069] 60 - Magnetic component group;

[0070] 62 - Magnetic components;

[0071] 70-Fixed base;

[0072] 71-First fixing part;

[0073] 80-Protective base;

[0074] 81 - Sensor mounting slot;

[0075] 82-Magnetic component mounting slot;

[0076] 83-Side groove;

[0077] 84 - Dustproof accessories;

[0078] 85 - Rectangular frame;

[0079] 86-Plug body;

[0080] 90-Fixed base;

[0081] 91-First fixing part;

[0082] 92 - First fixing hole;

[0083] 93-Second fixing part;

[0084] 100-Protective base;

[0085] 101-end wall;

[0086] 102 - First perforation;

[0087] 103-Sidewall;

[0088] 104 - First screw hole;

[0089] 105 - Lateral groove;

[0090] 106 - Magnetic component mounting slot;

[0091] 107 - Sensor mounting slot;

[0092] 108 - Second perforation;

[0093] 109 - Second screw hole;

[0094] 110 - Tightening screw. Detailed Implementation

[0095] The applicant hereby states that throughout this specification, including the embodiments described below and the claims, all directional terms are based on the directions shown in the drawings. Secondly, in the embodiments and drawings described below, the same reference numerals represent the same or similar elements or structural features thereof.

[0096] Please refer to the following first. Figure 1 , Figure 1 The linear transmission mechanism 1 shown is a ball screw, which includes a movable member 2. The movable member 2 is formed by a nut. The movable member 2 is fixed to a bearing seat 4 and can reciprocate along a screw shaft 5.

[0097] Please continue reading. Figure 2 and Figure 3The sensing device 10 of the first embodiment of the present invention includes a fixed base 20, a protective base 30, a fixing member 40, a sensor 50, and two magnetic element groups 60.

[0098] The fixing base 20 has a first fixing part 21, which has a first straight section 22 and a first bent section 23. The first straight section 22 has a first fixing hole 24 penetrating both the top and bottom surfaces. The first bent section 23 is integrally connected to one side of the first straight section 22. The fixing base 20 also has a second fixing part 25, which has a second straight section 26 and a second bent section 27. The second straight section 26 has a locking hole 28 penetrating both the top and bottom surfaces. The second bent section 27 is integrally connected between the first straight section 22 and the second straight section 26, so that there is a height difference between the first straight section 22 and the second straight section 26.

[0099] When assembling with linear transmission mechanism 1, such as Figure 1 As shown, an internal hex screw 6 passes through the locking hole 28 of the second fixing part 25 of the fixing base 20 and is screwed into a screw hole (not shown) of the movable part 2, thereby fixing the second fixing part 25 of the fixing base 20 to the surface 3 of the movable part 2. It is worth mentioning that since the end face of the movable part 2 originally has multiple screw holes for locking to the carrier 4, when the fixing base 20 of the sensing device 10 is fixed to the movable part 2, the end face of the movable part 2 does not need to be provided with additional screw holes, which reduces the manufacturing cost of this utility model and makes it convenient for customers to install this utility model on the existing movable part 2.

[0100] The protective base 30 has a sensor mounting slot 34 and two magnetic element mounting slots 35. The sensor mounting slot 34 has a T-shaped cross-section, and each magnetic element mounting slot 35 has a circular cross-section. The two magnetic element mounting slots 35 are adjacent to two opposite sides of the sensor mounting slot 34. Both the sensor mounting slot 34 and the two magnetic element mounting slots 35 extend inward from one end face 31 of the protective base 30 and penetrate through the inner surface 32 of the protective base 30 (the inner surface 32 referred to here is the surface facing the moving member 2). In addition, the protective base 30 has a lateral groove 36 penetrating both left and right sides, the contour of which matches the contour of the first fixing part 21 of the fixing base 20. For example... Figure 3 and Figure 4 As shown, the protective base 30 also has a receiving groove 37 and two second fixing holes 38. The receiving groove 37 is located on the outer surface 33 of the protective base 30 (the outer surface 33 referred to here is the surface facing away from the moving member 2). The two second fixing holes 38 are opposite each other, the upper second fixing hole 38 connects the receiving groove 37 and the lateral groove 36, and the lower second fixing hole 38 connects the lateral groove 36 and the sensor mounting groove 34.

[0101] When assembling with the mounting bracket 20, such as Figure 2 and Figure 3 As shown, the protective seat 30 is fitted into the first fixing part 21 of the fixing seat 20 radially along the first fixing hole 24 of the fixing seat 20 with a lateral groove 36, so that the two second fixing holes 38 of the protective seat 30 correspond to the two ends of the first fixing hole 24 of the fixing seat 20.

[0102] In this embodiment, the fastener 40 has a head 41 and a body 42 that connects to the head 41. During assembly, as... Figure 3 and Figure 4 As shown, the head 41 of the fastener 40 is accommodated in the groove 37 of the protective seat 30, and the body 42 of the fastener 40 is inserted into the two second fixing holes 38 of the protective seat 30 and the first fixing hole 24 of the fixing seat 20 in a tight fit manner, thus fixing the protective seat 30 to the first fixing part 21 of the fixing seat 20.

[0103] The sensor 50 has a housing 51, a sensing element 52 disposed within the housing 51, and a plurality of wires (not shown) passing through the housing 51 and connected to the sensing element 52, and a sheath 53 covering the wires. During assembly, as... Figure 2 and Figure 3 As shown, because the cross-sectional shape of the housing 51 matches the cross-sectional shape of the sensor mounting slot 34, the sensor 50 can be inserted into the sensor mounting slot 34 of the protective base 30 with the housing 51 as the housing 51. After assembly, as... Figure 4 As shown, the height H of the outer shell 51 protruding from the inner surface 32 of the protective seat 30 is 0.2mm~0.5mm, so that the sensor 50 can directly abut against the surface 3 of the moving part 2 for accurately sensing relevant data of the moving part 2 during operation (such as temperature, vibration, sound and pressure).

[0104] In this embodiment, each magnetic element group 60 has two abutting magnetic elements 62 (in practice, only at least one is needed). The cross-sectional shape of each magnetic element 62 matches the cross-sectional shape of the magnetic element mounting groove 35, so that each magnetic element group 60 can be installed into the magnetic element mounting groove 35 of the protective base 30 for adsorbing the surface 3 of the movable part 2. In this embodiment, the magnetic element 62 is a magnet, but it is not limited to this and can also be other magnetic materials.

[0105] As described above, the sensing device 10 of the first embodiment of this utility model can ensure that the sensor 50 is directly and tightly in contact with the surface 3 of the moving member 2, avoiding interference from other components and thus improving sensing accuracy. Furthermore, if the sensor 50 needs to be repaired or replaced, such as... Figure 5As shown, by applying force to pull up the fixing member 40, the protective base 30, together with the sensor 50 and each magnetic element 62, can be removed from the fixing base 20 along the radial direction of the first fixing hole 24. In this way, the sensor 50 can be repaired or replaced without disassembling the fixing base 20, thereby improving the convenience of maintenance. Moreover, the protective base 30 is attached to the surface 3 of the moving member 2 by using the magnetic element 62, which is quite convenient for both installation and removal.

[0106] It should be noted that the linear transmission mechanism 1 is not limited to the following: Figure 1 The ball screw shown can also be as follows: Figure 6 The linear guide rail shown. In conjunction with, for example... Figure 6 When the linear guide rail shown is in use, the second fixing part 25 of the fixing base 20 is locked to the moving part 2 formed by a slider. As for the assembly and disassembly methods and the overall effects achieved, they are the same as in the above embodiment, and will not be repeated here.

[0107] To cope with different linear transmission mechanisms 1 (such as...) Figure 7 The single-axis robot shown in the second embodiment of this utility model has a rectangular design for the sensing device 12, with the fixed base 70 and the protective base 80 fixed to the bearing seat 7 at one end. However, this embodiment can also be applied to ball screws and linear guides. Furthermore, in this embodiment, as... Figure 8 and Figure 9 As shown, the protective base 80 has only one magnetic element mounting slot 82, therefore, in this embodiment, only one magnetic element group 60 is configured. Furthermore, the sensor mounting slot 81 should also be designed with a circular cross-section to accommodate different sensors 50. Secondly, as... Figure 9 and Figure 10 As shown, in this embodiment, the lateral groove 83 penetrates one side of the protective seat 80, and the protective seat 80 can only be fitted into the first fixing part 71 of the fixing seat 70 in a single direction. It is worth mentioning that this embodiment can be configured with a dustproof accessory 84 according to actual needs, such as... Figure 11 As shown, the dustproof accessory 84 has a rectangular frame 85 and two plugs 86. The rectangular frame 85 is located on the outer periphery of the protective base 80 and surrounds the sensor 50 and the magnetic element assembly 60. The two plugs 86 respectively close the opening of the sensor mounting groove 81 and the opening of the magnetic element mounting groove 82 to prevent external factors from interfering with the sensing accuracy of the sensor 50. The detailed structure, assembly method, and the effects achieved when used with the linear transmission mechanism 1 of the other components (fixed member 40, sensor 50, and magnetic element assembly 60) are the same as in the first embodiment described above, and will not be repeated here.

[0108] Please continue reading. Figures 12 to 14The sensing device 14 of the third embodiment of this utility model is structurally similar to that of the second embodiment described above, except that the mounting and disassembly methods of the fixed base 90 and the protective base 100 are different.

[0109] In this embodiment, the first fixing part 91 of the fixing base 90 is in the shape of a cylindrical tube and has a first fixing hole 92, and the second fixing part 93 of the fixing base 90 is designed as a ring to meet different needs.

[0110] One side of the protective base 100 protrudes outward from an end wall 101 and two opposing side walls 103 connected to the end wall 101. A lateral groove 105 is formed between the end wall 101 and the two side walls 103. One side wall has a first through hole 102, and the other side wall 103 has a first screw hole 104. Furthermore, as... Figure 12 and Figure 13 As shown, the protective base 100 has a second through hole 108 at the end away from the lateral recess 105, which is vertically connected to the magnetic element mounting groove 106, and a second screw hole 109 at the end that is vertically connected to the magnetic element mounting groove 106 and the sensor mounting groove 107. A tightening screw 110 passes through the second through hole 108 and is screwed into the second screw hole 109, so that the end of the tightening screw 110 abuts against the sheath 53 of the sensor 50, thereby ensuring that the sensor 50 is securely positioned in the sensor mounting groove 107.

[0111] In this embodiment, the fastener 43 is a screw with a head 44 and a threaded portion 45 connecting the head 44. During assembly, the protective seat 100 is fitted into the first fixing portion 91 of the fixing seat 90 radially along the first fixing hole 92 with a lateral groove 105. Then, the threaded portion 45 of the fastener 43 passes through the first through hole 102 and the first fixing hole 92 of the fixing seat 90 and is screwed into the first screw hole 104, so that the protective seat 100 is fixed to the first fixing portion 91 of the fixing seat 90.

[0112] As can be seen from the above, in the third embodiment of this utility model, when the sensor 50 needs to be repaired or replaced, the fixing member 43 is first unscrewed with a screwdriver, and the protective seat 100, together with the sensor 50 and the magnetic element assembly 60, can be removed from the fixing seat 90 along the radial direction of the first fixing hole 92. Then, the tightening screw 110 is removed with the same screwdriver. In this way, the sensor 50 can be repaired or replaced without disassembling the fixing seat 90, so as to improve the convenience of maintenance.

[0113] The above description is merely an optional embodiment of this utility model and should not be construed as limiting the scope of the embodiments of this utility model; that is, any equivalent changes and modifications made in accordance with the claims of this utility model should still fall within the scope of this utility model patent.

[0114] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sensing device for a linear transmission mechanism, characterized in that, Include: A fixed base is fixed to the linear transmission mechanism, and the fixed base has a first fixing hole; A protective base has a lateral groove and a second fixing hole communicating with the lateral groove. The protective base is detachably disposed on the fixing base via the lateral groove. The protective base further has a sensor mounting groove and a magnetic element mounting groove adjacent to the sensor mounting groove. A fastener is detachably disposed in the first fixing hole of the fixing base and the second fixing hole of the protective base, for fixing the protective base to the fixing base; A sensor is disposed in the sensor mounting slot of the protective base and abuts against the linear transmission mechanism; and A magnetic element is disposed in the magnetic element mounting groove of the protective base for adsorbing the linear transmission mechanism.

2. The sensing device for a linear transmission mechanism according to claim 1, characterized in that, The mounting base has a first mounting portion and a second mounting portion connected to the first mounting portion. The first mounting portion has a first mounting hole. The second mounting portion is used to fix the linear transmission mechanism. The protective seat is detachably provided on the second mounting portion of the mounting base along the radial direction of the first mounting hole of the mounting base by means of the lateral groove.

3. The sensing device for a linear transmission mechanism according to claim 1, characterized in that, The protective base has an inner surface facing the linear drive mechanism, and the sensor protrudes from the inner surface.

4. The sensing device for a linear transmission mechanism according to claim 3, characterized in that, The sensor protrudes from the inner surface by a height of 0.2mm to 0.5mm.

5. The sensing device for a linear transmission mechanism according to any one of claims 1 to 4, characterized in that, The protective base has an outer surface facing away from the linear transmission mechanism, the outer surface having a groove communicating with the second fixing hole; the fixing member has a head and a body connecting the head, the head of the fixing member being received in the groove of the protective base, and the body of the fixing member being tightly fitted through the first fixing hole and the second fixing hole of the protective base.

6. The sensing device for a linear transmission mechanism according to any one of claims 1 to 4, characterized in that, The protective base has an end wall and two side walls that are connected to the end wall. A lateral groove is formed between the end wall and the side walls. One of the side walls has a first through hole, and the other side wall has a first screw hole. The fastener has a head and a threaded portion that connects to the head. The threaded portion of the fastener passes through the first through hole and the first fixing hole of the base and is screwed into the first screw hole.

7. The sensing device for a linear transmission mechanism according to claim 6, characterized in that, The protective base further has a second through hole communicating with the magnetic element mounting slot and a second screw hole communicating with the magnetic element mounting slot and the sensor mounting slot; the sensor is positioned in the sensor mounting slot by being pushed by a tightening screw, the tightening screw passing through the second through hole and screwed into the second screw hole.

8. The sensing device for a linear transmission mechanism according to claim 1, characterized in that, It also includes a dustproof accessory, which is located on the protective base and around the sensor.

9. The sensing device for a linear transmission mechanism according to claim 2, characterized in that, The second fixing part of the fixing base has a locking hole, and the second fixing part of the fixing base is fixed to the linear transmission mechanism by a screw passing through the locking hole.

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