Linear module with position sensing

Abstract

The application relates to a linear module with position sensing, relates to the technical field of machining, and comprises a guide rail, a motor module slidably connected to the guide rail, a magnetic scale assembly comprising an incremental magnetic track and an absolute magnetic track, the incremental magnetic track and the absolute magnetic track being fixedly connected to different two side walls of the guide rail respectively, a sensor assembly comprising an incremental sensor and an absolute sensor, the incremental sensor and the absolute sensor being fixedly connected to the motor module, the incremental sensor being arranged towards the incremental magnetic track, and the absolute sensor being arranged towards the absolute magnetic track, and a data processing system arranged outside the guide rail and electrically connected to the incremental sensor and the absolute sensor. The application has the effect that the incremental magnetic track and the absolute magnetic track are arranged on different side walls of the guide rail, the overall space occupancy of the magnetic scale assembly is greatly reduced, and the surface mounting demand of the small-size guide rail is more adapted.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to a linear module with position sensing. Background Technology

[0002] Linear modules are core transmission components for achieving precise linear motion and are widely used in machine tools, automated production lines, semiconductor equipment, medical instruments, and other fields. As industrial manufacturing moves towards miniaturization and high precision, precision equipment demands miniaturization of linear modules while maintaining excellent positioning and detection accuracy to meet the requirements of precision operations.

[0003] In related technologies, Chinese Patent Publication No. CN223076021U discloses an integrated intelligent rolling linear guide pair, including a guide rail, a motor module assembly, and a data processing system. A combined magnetic grating ruler is provided on the lower groove of the guide rail. The motor module assembly is mounted on the guide rail and slides back and forth along it. It includes a motor module body and a composite sensor. The composite sensor is embedded in the inner wall of the motor module body and is positioned towards the combined magnetic grating ruler. The data processing system is located outside the guide rail. It receives data from the composite sensor, processes it, and feeds it back to the terminal device.

[0004] Regarding the aforementioned technologies, it is necessary to ensure that the magnetic scale has a certain width to guarantee the stability of the magnetic field signal and the detection sensitivity. When the size of the linear module with position sensing is small and the width of the combined magnetic scale is greater than the thickness of the guide rail, if the combined magnetic scale is forcibly installed against the surface of the guide rail, it will cause the combined magnetic scale to exceed the guide rail contour, interfere with the movement of the motor module, and destroy the compact structure of the guide rail pair. There is still room for improvement. Utility Model Content

[0005] To address the problem that it is difficult to mount a combined magnetic scale onto the guide rail surface of a small-sized linear module with position sensing, thus hindering the miniaturization of an integrated intelligent rolling belt position sensing linear module, this application provides a linear module with position sensing.

[0006] The linear module with position sensing provided in this application adopts the following technical solution: A linear module with position sensing, comprising: guide; The motor module is slidably connected to the guide rail; The magnetic scale assembly includes an incremental magnetic track and an absolute magnetic track, which are respectively fixedly connected to two different guide rail walls of the guide rail. The sensor assembly includes an incremental sensor and an absolute sensor, both of which are fixedly connected to the motor module. The incremental sensor is arranged facing the incremental magnetic track, and the absolute sensor is arranged facing the absolute magnetic track.

[0007] By adopting the above technical solution, the incremental magnetic track and the absolute magnetic track are set on different rail walls, breaking the space limitation of the traditional combined magnetic scale stacking arrangement. It does not require occupying the installation thickness on the same side of the rail, greatly reducing the overall space occupancy of the magnetic scale assembly, thus making it more suitable for the surface mounting requirements of small-sized rails.

[0008] Optionally, the motor module includes a motor module body and a mounting bracket fixedly connected to the motor module body.

[0009] By adopting the above technical solution, the mounting bracket provides a stable mounting carrier for incremental and absolute sensors, which facilitates flexible adjustment of the sensor's fixed posture according to the position of the magnetic track, ensuring that the sensor maintains a precise sensing distance with the corresponding magnetic track. At the same time, it simplifies the assembly process of the sensor and motor module and improves the integration of the overall structure.

[0010] Optionally, the incremental track and the absolute track are fixedly connected to two adjacent rail walls of the guide rail.

[0011] By adopting the above technical solution, the spatial layout of the adjacent walls of the guide rail is utilized to make the incremental magnetic track and the absolute magnetic track distributed perpendicularly or at an angle in space, avoiding spatial overlap in the same plane, making full use of the corner area of ​​the guide rail, further compressing the space occupied by the magnetic scale assembly, and improving the space utilization rate of the guide rail surface.

[0012] Optionally, the mounting bracket includes a vertically arranged first mounting part and a horizontally arranged second mounting part, and the incremental sensor and the absolute sensor are respectively fixedly connected to the first mounting part and the second mounting part in a one-to-one correspondence.

[0013] By adopting the above technical solution, the horizontal and vertical mounting structure is adapted to the spatial orientation of the adjacent wall of the guide rail, which allows the incremental sensor and the absolute sensor to be accurately aligned with the incremental magnetic track and the absolute magnetic track on the adjacent wall at corresponding angles, thereby improving the stability of the sensing signal.

[0014] Optionally, the incremental track and the absolute track are fixedly connected to the two opposite guide rail walls of the guide rail.

[0015] By adopting the above technical solution, the incremental magnetic track and the absolute magnetic track are set on opposite sides of the guide rail, which can balance the load distribution on both sides of the guide rail, reduce the problem of uneven force on the guide rail caused by the installation of magnetic track on one side, and improve the balance of force on the guide rail.

[0016] Optionally, the mounting bracket includes two third mounting portions arranged one-to-one on both sides of the motor module body, and the incremental sensor and the absolute sensor are fixedly connected one-to-one to the two third mounting portions.

[0017] By adopting the above technical solution, the two third installation parts are arranged on the two guide rail walls opposite each other, so that the incremental sensor and the absolute sensor are accurately aligned with their respective incremental magnetic track and absolute magnetic track, ensuring stable acquisition of the sensing signal; on the other hand, the sensors are set on both sides of the motor module body, avoiding the space congestion caused by centralized installation on one side, and adapting to the compact layout requirements of small linear modules.

[0018] Optionally, the mounting bracket may further include a connecting portion that connects the two third mounting portions.

[0019] By adopting the above technical solution, the connecting part connects the two third mounting parts into a whole, which greatly improves the structural rigidity and deformation resistance of the mounting frame. It can effectively resist external forces such as vibration and impact during the sliding process of the motor module. Moreover, the integrated structure enhances the stability of the connection between the mounting frame and the main body of the motor module, reduces the risk of sensor loosening after long-term use, and ensures the long-term reliability of position detection.

[0020] Optionally, the incremental sensor includes an incremental housing with an opening on one side, an incremental sensing head detachably mounted on the side of the incremental housing near the opening, and an incremental detection element arranged inside the incremental housing. The incremental sensing head is provided with a mating surface adapted to the guide rail.

[0021] By adopting the above technical solution, the fitting design between the contact surface and the guide rail can reduce the gap between the incremental sensing head and the guide rail surface, ensuring that the incremental sensing head and the incremental magnetic track always maintain a stable sensing distance, thus improving the accuracy of incremental detection. On the other hand, the detachable incremental sensing head makes it easy to replace the appropriate model according to the guide rail size, enhancing the versatility of the sensor.

[0022] Optionally, the incremental housing has grooves on both sides near the opening, and the incremental sensing head has protrusions that correspond one-to-one with the grooves. The protrusions and the bottom of the grooves are connected by bolts.

[0023] By adopting the above technical solution, the interlocking structure of the groove and the protrusion provides precise pre-positioning for the installation of the incremental sensing head and the incremental housing, improving the convenience of aligning the two positions; the bolt connection strengthens the connection between the two, reduces the relative displacement caused by factors such as vibration and impact during use, improves the relative position stability of the incremental sensing head and the incremental detection element, and thus improves the accuracy and stability of incremental detection.

[0024] Optionally, the linear module with position sensing also includes a data processing system fixedly connected to the motor module, the data processing system being electrically connected to both the incremental sensor and the absolute sensor.

[0025] By adopting the above technical solution, the data processing system receives the continuous displacement change signal output by the incremental sensor and the absolute position signal output by the absolute sensor in real time. The incremental signal is used to achieve high-precision dynamic displacement tracking, and the absolute signal is used to achieve initial position calibration and position memory after power failure. This effectively makes up for the detection limitations of a single sensor and improves the overall positioning accuracy and reliability.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. This application separates the incremental magnetic track and the absolute magnetic track on different side walls of the guide rail, which greatly reduces the overall space occupancy of the magnetic scale assembly, thereby adapting to the surface mounting requirements of small-sized guide rails; 2. By utilizing the spatial layout of the adjacent walls of the guide rail, the incremental magnetic track and the absolute magnetic track are distributed perpendicularly or at an angle in space, which further reduces the space occupied by the magnetic scale assembly and improves the space utilization rate of the guide rail surface. 3. The incremental magnetic track and the absolute magnetic track are set on opposite sides of the guide rail to balance the load distribution on both sides of the guide rail and improve the balance of the force on the guide rail. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a linear module with position sensing in Embodiment 1 of this application.

[0028] Figure 2 This is an exploded view of a linear module with position sensing according to Embodiment 1 of this application.

[0029] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle.

[0030] Figure 4 This is an exploded view of the incremental sensor in Embodiment 1 of this application.

[0031] Figure 5 This is an exploded view of the absolute sensor in Embodiment 1 of this application.

[0032] Figure 6 This is an exploded view of a linear module with position sensing according to Embodiment 2 of this application.

[0033] Figure 7 yes Figure 6 A magnified structural diagram of section B.

[0034] Figure 8This is a schematic diagram of the structure of the motor module, sensor assembly, and data processing system in Embodiment 3 of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Guide rail; 11. Embedded slot; 2. Motor module; 21. Motor module body; 22. Mounting bracket; 221. First mounting part; 222. Second mounting part; 223. Third mounting part; 224. Connecting part; 3. Magnetic scale assembly; 31. Incremental magnetic track; 32. Absolute magnetic track; 4. Sensor assembly; 41. Incremental sensor; 411. Incremental housing; 4111. Groove; 412. Incremental sensing head; 4121. Protrusion; 4122. Fitting surface; 413. Incremental detection element; 42. Absolute sensor; 421. Absolute housing; 422. Absolute detection element; 43. Data cable; 5. Data processing system. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0037] This application discloses a linear module with position sensing.

[0038] Example 1 Reference Figure 1 The linear module with position sensing includes a guide rail 1, a motor module 2, a magnetic scale assembly 3, a sensor assembly 4, and a data processing system 5. The motor module 2 is slidably connected to the guide rail 1. The magnetic scale assembly 3 is fixedly connected to the guide rail 1. The sensor assembly 4 is fixedly connected to the motor module 2 to achieve synchronous movement with the motor module 2. The magnetic scale assembly 3 and the sensor assembly 4 work together to detect the sliding distance of the motor module 2. The data processing system 5 is fixedly connected to the motor module 2 and electrically connected to the sensor assembly 4 to process the detection data from the sensor assembly 4 and wirelessly transmit the results to terminal devices such as mobile phones and computers.

[0039] Reference Figure 2 Each of the two adjacent guide rail walls of the guide rail 1 has an embedded groove 11. The magnetic scale assembly 3 includes an incremental magnetic track 31 and an absolute magnetic track 32, which are fixedly connected to the bottom of the two embedded grooves 11 respectively. The side of the incremental magnetic track 31 and the absolute magnetic track 32 away from the bottom of the embedded groove 11 is flush with the side wall surface of the guide rail 1 to reduce frictional damage caused by the exposure of the incremental magnetic track 31 and the absolute magnetic track 32. To prevent the incremental magnetic track 31 and the absolute magnetic track 32 from shifting along the length of the guide rail 1 during the sliding of the motor module 2, both ends of the incremental magnetic track 31 and the absolute magnetic track 32 abut against the groove wall of the embedded groove 11.

[0040] Reference Figure 2 and Figure 3The motor module 2 includes a motor module body 21 and a mounting bracket 22. The mounting bracket 22 is fixedly connected to the motor module body 21 for mounting the sensor assembly 4. The mounting bracket 22 includes a vertically arranged first mounting portion 221 and a horizontally arranged second mounting portion 222. The sensor assembly 4 includes an incremental sensor 41 and an absolute sensor 42, which are fixedly connected to the first mounting portion 221 and the second mounting portion 222 respectively. The incremental sensor 41 is arranged facing the incremental magnetic track 31 to collect signals of continuous displacement changes. The absolute sensor 42 is arranged facing the absolute magnetic track 32 to collect absolute position signals. Data lines 43 are fixedly connected to both the incremental sensor 41 and the absolute sensor 42. The ends of the two data lines 43 away from the sensor assembly 4 are fixedly connected to the data processing system 5 to transmit the signals collected by the incremental sensor 41 and the absolute sensor 42 to the data processing system 5 for data processing.

[0041] Reference Figure 2 and Figure 4 The incremental sensor 41 includes an incremental housing 411, an incremental sensing head 412, and an incremental detection element 413. The incremental housing 411 has a cavity with an opening on one side for mounting the incremental detection element 413. The incremental housing 411 has grooves 4111 on both sides near the opening. The incremental sensing head 412 has protrusions 4121 integrally connected to both sides, with two protrusions 4121 correspondingly embedded in the two grooves 4111 and connected to the bottom of the grooves 4111 by bolts, allowing the incremental sensing head 412 to be detachably connected to the side of the incremental housing 411 near the opening. To reduce errors caused by the detection gap, the incremental sensing head 412 has a mating surface 4122 adapted to the guide rail 1, ensuring that the incremental sensing head 412 maintains a stable sensing distance with the surface of the guide rail 1.

[0042] Reference Figure 3 and Figure 5 The absolute sensor 42 includes an absolute housing 421 and several absolute detection elements 422. The several absolute detection elements 422 are arranged in a single row along the sliding direction of the motor module 2, and adjacent absolute detection elements 422 are closely fitted together to improve the continuity of the detection signal and reduce the detection blind zone.

[0043] The implementation principle of Example 1 is as follows: During the sliding process of the motor module 2 along the guide rail 1, the sensor assembly 4 moves synchronously with the motor module 2. The incremental sensor 41 cooperates with the incremental magnetic track 31 to collect the continuous displacement change signal of the motor module 2 in real time, ensuring high accuracy of dynamic displacement detection. The absolute sensor 42 cooperates with the absolute magnetic track 32 to collect the absolute position signal and realize the initial position calibration. The two signals are synchronously transmitted to the data processing system 5 to complete the high-precision real-time positioning and synchronize the results to the terminal device.

[0044] Example 2 Reference Figure 6 and Figure 7 The difference between this embodiment and Embodiment 1 lies in the installation positions of the magnetic scale assembly 3 and the sensor assembly 4. Each of the two opposing guide rail walls of the guide rail 1 has an embedding groove 11, with the incremental magnetic track 31 and the absolute magnetic track 32 respectively fixedly connected to the bottom of the two embedding grooves 11. The mounting bracket 22 includes two third mounting parts 223, which are respectively arranged on both sides of the motor module body 21. The incremental sensor 41 and the absolute sensor 42 are respectively fixedly connected to the two third mounting parts 223, so that the incremental sensor 41 faces the incremental magnetic track 31 and the absolute sensor 42 faces the absolute magnetic track 32.

[0045] The implementation principle of Example 2 is as follows: During the sliding process of the motor module 2 along the guide rail 1, the sensor assembly 4 moves synchronously with the motor module 2. The incremental sensor 41 cooperates with the incremental magnetic track 31 to collect the continuous displacement change signal of the motor module 2 in real time, ensuring high accuracy of dynamic displacement detection. The absolute sensor 42 cooperates with the absolute magnetic track 32 to collect the absolute position signal and realize the initial position calibration. The two signals are synchronously transmitted to the data processing system 5 to complete the high-precision real-time positioning and synchronize the results to the terminal device.

[0046] Example 3 Reference Figure 8 The difference between this embodiment and Embodiment 2 lies in the structure of the mounting bracket 22. The mounting bracket 22 includes two third mounting portions 223 and a connecting portion 224. The two third mounting portions 223 are respectively arranged on both sides of the motor module body 21 in a one-to-one correspondence, and the two ends of the connecting portion 224 are respectively fixedly connected to the two third mounting portions 223 to connect the two third mounting portions 223 into a whole.

[0047] The implementation principle of Example 3 is as follows: During the sliding process of the motor module 2 along the guide rail 1, the sensor assembly 4 moves synchronously with the motor module 2. The incremental sensor 41 cooperates with the incremental magnetic track 31 to collect the continuous displacement change signal of the motor module 2 in real time, ensuring high accuracy of dynamic displacement detection. The absolute sensor 42 cooperates with the absolute magnetic track 32 to collect the absolute position signal and realize the initial position calibration. The two signals are synchronously transmitted to the data processing system 5 to complete the high-precision real-time positioning and synchronize the results to the terminal device.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A linear module with position sensing, characterized in that, include: Guide rail (1); The motor module (2) is slidably connected to the guide rail (1); The magnetic scale assembly (3) includes an incremental magnetic track (31) and an absolute magnetic track (32), wherein the incremental magnetic track (31) and the absolute magnetic track (32) are respectively fixedly connected to two different guide rail walls of the guide rail (1); The sensor assembly (4) includes an incremental sensor (41) and an absolute sensor (42). Both the incremental sensor (41) and the absolute sensor (42) are fixedly connected to the motor module (2). The incremental sensor (41) is arranged facing the incremental magnetic track (31), and the absolute sensor (42) is arranged facing the absolute magnetic track (32).

2. The linear module with position sensing according to claim 1, characterized in that: The motor module (2) includes a motor module body (21) and a mounting bracket (22) fixedly connected to the motor module body (21).

3. The linear module with position sensing according to claim 2, characterized in that: The incremental magnetic track (31) and the absolute magnetic track (32) are respectively fixedly connected to two adjacent rail walls of the guide rail (1).

4. The linear module with position sensing according to claim 3, characterized in that: The mounting bracket (22) includes a vertically arranged first mounting part (221) and a horizontally arranged second mounting part (222). The incremental sensor (41) and the absolute sensor (42) are fixedly connected to the first mounting part (221) and the second mounting part (222) respectively.

5. The linear module with position sensing according to claim 2, characterized in that: The incremental magnetic track (31) and the absolute magnetic track (32) are respectively fixedly connected to the two opposite rail walls of the guide rail (1).

6. The linear module with position sensing according to claim 5, characterized in that: The mounting bracket (22) includes two third mounting parts (223) arranged one-to-one on both sides of the motor module body (21), and the incremental sensor (41) and the absolute sensor (42) are fixedly connected to the two third mounting parts (223) respectively.

7. The linear module with position sensing according to claim 6, characterized in that: The mounting bracket (22) also includes a connecting part (224) that connects the two third mounting parts (223).

8. The linear module with position sensing according to claim 1, characterized in that: The incremental sensor (41) includes an incremental housing (411) with an opening on one side, an incremental sensing head (412) detachably mounted on the side of the incremental housing (411) near the opening, and an incremental detection element (413) arranged in the incremental housing (411). The incremental sensing head (412) is provided with a mating surface (4122) adapted to the guide rail (1).

9. The linear module with position sensing according to claim 8, characterized in that: The incremental housing (411) has grooves (4111) on both sides near the opening. The incremental sensing head (412) has protrusions (4121) that correspond one-to-one with the grooves (4111). The protrusions (4121) and the bottom of the grooves (4111) are connected by bolts.

10. The linear module with position sensing according to claim 1, characterized in that: It also includes a data processing system (5) fixedly connected to the motor module (2), and the data processing system (5) is electrically connected to both the incremental sensor (41) and the absolute sensor (42).

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