Optical magnetic induction type multi-circle gear set encoder

Abstract

The utility model discloses a photomagnetic induction type multi-ring gear set encoder, comprising an encoder housing, one side of the outer surface of the encoder housing is provided with a waterproof sheath, one side of the waterproof sheath is provided with an anti-falling mechanism used for locking a data line, the anti-falling mechanism comprises a wire outlet sleeve, the wire outlet sleeve is arranged on one side of the waterproof sheath, and the wire outlet sleeve is provided with a wire outlet. A locking ring is arranged on the outer surface of the wire outlet sleeve, an inclined chamfer part is arranged on one side of the inner surface of the locking ring, and the wire outlet sleeve is further provided with a plurality of chuck assemblies. A main shaft is arranged in the middle of the interior of the shell, a center gear is arranged on the main shaft, the center gear is engaged with a first gear, a second gear and a third gear, and magnetic pole structures are arranged on the lower sides of the first gear, the second gear and the third gear. The situation that the data line falls off after being used for a long time is avoided, and high-precision measurement can be achieved on a small-size encoder.

Description

Technical Field

[0001] The utility model relates to an encoder, in particular to a photo-magnetic induction multi-turn gear set encoder. Background Art

[0002] The structure of the photo-magnetic induction multi-turn gear set encoder is based on the principle of light reflection: a visible light spot is emitted by a photoelectric chip, and the data information on the code disk is reflected in the form of light to the photoelectric chip through a reflective code disk to receive the light source information reflected by the code disk, so as to calculate the angular position within 360 degrees of a single turn. Then, through the coaxial magnets corresponding to multiple gears and a magnetic induction chip, a non-repeating position signal greater than 360 degrees is fed back. The combination of the two signals gives a non-repeating position signal for each turn of more than about one turn.

[0003] At present, after the data line of the photo-magnetic induction multi-turn gear set encoder is connected, when a robot or mechanical equipment moves, the data line will become loose, affecting the stability of data transmission. At the same time, the induction of both the single turn and multi-turn of the multi-turn gear absolute encoder is completed by coaxial magnets and a magnetic induction chip, but the high precision of the single turn value cannot be achieved by the magnetic induction principle. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a photo-magnetic induction multi-turn gear set encoder, which solves the problem that after the data line of the current photo-magnetic induction multi-turn gear set encoder is connected, when a robot or mechanical equipment moves, the data line will become loose, affecting the stability of data transmission. At the same time, the induction of both the single turn and multi-turn of the multi-turn gear absolute encoder is completed by coaxial magnets and a magnetic induction chip, but the high precision of the single turn value cannot be achieved by the magnetic induction principle.

[0005] To solve the above technical problem, the utility model provides a photo-magnetic induction multi-turn gear set encoder, which includes an encoder housing. A top cover is arranged on the encoder housing. A waterproof sheath is arranged on one side of the outer surface of the encoder housing. An anti-disconnection mechanism for locking the data line is arranged on one side of the waterproof sheath. The anti-disconnection mechanism includes an outlet sleeve. The outlet sleeve is arranged on one side of the waterproof sheath. A locking ring is arranged on the outer surface of the outlet sleeve. The locking ring is connected to the outlet sleeve by threads. An inclined chamfering part is arranged on one side of the inner surface of the locking ring. The outlet sleeve is also provided with a plurality of chuck assemblies that automatically fix the data line as the locking ring moves; wherein, a main shaft is arranged in the middle of the housing. A central gear is arranged on the main shaft. The central gear meshes with a first gear, a second gear and a third gear respectively. Magnetic pole structures are arranged below the first gear, the second gear and the third gear.

[0006] Preferably, the chuck assembly includes a locking rod disposed in a guiding hole which is arranged in an installation groove formed on the outer surface of the wire outlet sleeve. An arc-shaped wedge corresponding to the inclined chamfering portion is provided at the end of the locking rod. The arrangement of the arc-shaped wedge can drive the locking rod to move.

[0007] Preferably, a clamping block is provided at the bottom of the locking rod, and a return spring is arranged on the outer surface of the locking rod. One end of the return spring is connected to the locking rod, and the other end is connected to the guiding hole, which can lock and fix the data cable.

[0008] Preferably, the diameter of the first gear is larger than that of the second gear, and the diameter of the second gear is larger than that of the third gear, which enables the number of teeth of the first gear, the second gear, and the third gear to be different.

[0009] Preferably, the magnetic pole structure includes a cylindrical pin which is connected to the first gear, the second gear, and the third gear through a bearing sleeve. Magnetic isolation rings are arranged on the outer surfaces of the first gear, the second gear, and the third gear, and upper magnets and lower magnets are respectively arranged on both sides of the first gear, the second gear, and the third gear.

[0010] Preferably, magnetic induction chips are arranged on the magnetoelectric PCB boards below the first gear, the second gear, and the third gear. The magnetoelectric PCB boards are arranged at the bottom of the upper support pillar, which can sense the positions of the upper magnets and the lower magnets in the corresponding gears.

[0011] Preferably, a code tray is provided at the bottom of the main shaft, and a tray seat is arranged at the bottom of the code tray.

[0012] Preferably, a lower support pillar is arranged below the magnetoelectric PCB board, and an optoelectronic PCB board is arranged at the bottom of the lower support pillar. A light sensing chip is arranged on the optoelectronic PCB board.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model can assist in clamping and fixing the data cable, avoiding the situation of the data cable falling off during long-term use and ensuring the stability of its data transmission.

[0015] 2. The single circle formed by the present utility model uses the principle of light sensing to complete high-precision position information, and the multi-circles use the principle of magnetic induction to complete the position information of the number of circles, which can achieve high-precision measurement on an encoder with a small volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2Schematic half-sectional structure diagram of the anti-detachment mechanism in the present utility model;

[0018] Figure 3 is Figure 2 Partial enlarged structure diagram of part A in

[0019] Figure 4 Schematic first perspective structure diagram inside the present utility model;

[0020] Figure 5 Schematic second perspective structure diagram inside the present utility model;

[0021] Figure 6 Schematic assembly structure diagram of the central gear, the first gear, the second gear and the third gear in the present utility model;

[0022] Figure 7 Schematic structure diagram of the magnetic pole structure in the present utility model;

[0023] Figure 8 Schematic half-sectional structure diagram of the magnetic pole structure in the present utility model;

[0024] In the figure: 1. Anti-detachment mechanism, 2. Encoder housing, 3. Top cover, 4. Main shaft, 5. Waterproof sheath, 6. Data cable, 21. Upper support column, 22. Lower support column, 23. Code tray, 24. Optoelectronic PCB board, 25. Magnetoelectric PCB board, 41. Ball bearing, 42. First gear, 43. Second gear, 44. Central gear, 45. Third gear, 101. Wire outlet sleeve, 102. Arc wedge block, 103. Locking ring, 104. Tapered chamfer part, 105. Guide hole, 106. Return spring, 107. Clamping block, 108. Locking rod, 421. Cylindrical pin, 422. Bearing sleeve, 423. Upper magnet, 424. Lower magnet, 425. Magnetic isolation ring. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. All directional indications (such as up, down, left, right, front, back...) in the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0026] Please refer to Figures 1 - 3, A magneto-optical induction multi-turn gear set encoder, comprising an encoder housing 2, a top cover 3 is arranged on the encoder housing 2, a waterproof sheath 5 is arranged on one side of the outer surface of the encoder housing 2, and an anti-disconnection mechanism 1 for locking the data line 6 is arranged on one side of the waterproof sheath 5. The anti-disconnection mechanism 1 includes an outlet sleeve 101, the outlet sleeve 101 is arranged on one side of the waterproof sheath 5, a locking ring 103 is arranged on the outer surface of the outlet sleeve 101, the locking ring 103 is connected to the outlet sleeve 101 by threads, and an inclined chamfer portion 104 is arranged on one side of the inner surface of the locking ring 103. The outlet sleeve 101 is also provided with a plurality of chuck assemblies.

[0027] The chuck assembly includes a locking rod 108, the locking rod 108 is arranged in a guide hole 105, the guide hole 105 is arranged in a receiving installation groove, the installation groove is arranged on the outer surface of the outlet sleeve 101, an arc-shaped wedge block 102 corresponding to the inclined chamfer portion 104 is arranged at the end of the locking rod 108. Through the arrangement of the arc-shaped wedge block 102, the locking rod 108 can be driven to move. A clamping block 107 is arranged at the bottom of the locking rod 108, which can clamp and fix the data line 6. Specifically, the surface of the clamping block 107 can be arc-shaped to increase its contact area with the surface of the data line 6 and further improve its clamping stability.

[0028] When the data line 6 is installed in the outlet sleeve 101, the locking ring 103 is rotated. The locking ring 103 rotates and moves on the outlet sleeve 101. When the locking sleeve moves to drive the inclined chamfer portion 104 to move, when the inclined chamfer portion 104 fits with the arc-shaped wedge block 102, as the locking ring 103 moves, the arc-shaped wedge block 102 is driven to move. The arc-shaped wedge block 102 drives the locking rod 108 to move in the guide hole 105. The movement of the locking rod 108 drives the clamping block 107 to move. When the clamping block 107 fits with the surface of the data line 6, the data line 6 is locked and fixed, avoiding the situation of the data line 6 falling off.

[0029] Furthermore, a return spring 106 is arranged on the outer surface of the locking rod 108. One end of the return spring 106 is connected to the locking rod 108, and the other end of the return spring 106 is connected to the guide hole 105. When the locking rod 108 moves, the elastic force of the return spring 106 is compressed. When the data line 6 is overhauled, the data line 6 can be automatically loosened.

[0030] As a specific embodiment of the present application, please refer to Figures 4 - 8, a main shaft 4 is arranged in the middle of the housing. A central gear 44 is arranged on the main shaft 4. The central gear 44 meshes with a first gear 42, a second gear 43 and a third gear 45 respectively. Magnetic pole structures are arranged on the lower sides of the first gear 42, the second gear 43 and the third gear 45. The diameter of the first gear 42 is larger than that of the second gear 43, and the diameter of the second gear 43 is larger than that of the third gear 45, so that the number of teeth of the first gear 42, the second gear 43 and the third gear 45 can be different. The magnetic pole structure includes a cylindrical pin 421. The cylindrical pin 421 is connected to the first gear 42, the second gear 43 and the third gear 45 through a bearing sleeve 422. Magnetic isolation rings 425 are arranged on the outer surfaces of the first gear 42, the second gear 43 and the third gear 45. Upper magnets 423 and lower magnets 424 are arranged on both sides of the first gear 42, the second gear 43 and the third gear 45 respectively. Magnetic induction chips are arranged on the magnetoelectric PCB boards 25 on the lower sides of the first gear 42, the second gear 43 and the third gear 45. The magnetoelectric PCB boards 25 are arranged at the bottom of the upper support columns 21 and can sense the positions of the upper magnets 423 and the lower magnets 424 in the corresponding gears. A code tray 23 is arranged at the bottom of the main shaft 4. A tray seat is arranged at the bottom of the code tray 23. A lower support column 22 is arranged on the lower side of the magnetoelectric PCB board 25. An optoelectronic PCB board 24 is arranged at the bottom of the lower support column 22. A light sensing chip is arranged on the optoelectronic PCB board 24.

[0031] First, assemble the ball bearing 41 and the main shaft 4 into the encoder housing 2 according to the tolerance requirements. When the main shaft 4 rotates, it drives the first gear 42, the second gear 43, and the third gear 45 to rotate simultaneously. The rotation of the first gear 42, the second gear 43, and the third gear 45 drives the magnets 423 and 424 thereon to rotate. The S poles of the coaxial magnets 423 and 424 in the first gear 42, the second gear 43, and the third gear 45 are evenly divided at 180° on one end face. The magnetic induction chip senses the rotation position of the lower magnet 424, and the magnetic induction chip outputs continuous digital signals through the SPI interface to the MCU on the magnetoelectric PCB board 25 for calculation and processing. On the code tray 23 on the main shaft 4, information data to be read is engraved. Below the data area, there is the optoelectronic PCB board 24 corresponding to the light sensing chip and the processing circuit. The colored light source on the light sensing chip irradiates the code tray 23, and the information on the code tray 23 is read. Through the principle of light reflection, the light signal is reflected to the receiver of the light sensing chip, so that the position information on the code tray 23 is read and transmitted to the MCU on the optoelectronic PCB board 24 in the form of digital signals through the SPI interface on the light sensing chip for calculation and processing. The light sensing chip senses the position information of the code tray 23 and feeds back the angular position signal within 360° of a single turn. With the optical sensing method, higher precision can be achieved. The existing technology can reach ±2 arcseconds, and 2nN = 24 resolution, thus solving the measurement accuracy that could not be broken through by magnetic induction for single-turn measurement before. The combination of the first gear 42, the second gear 43, and the third gear 45 installed in the encoder housing 2 calculates the angular position above one turn through a special calculation method based on the magnetic induction principle and the different position changes generated by the simultaneous rotation of gears with different numbers of teeth. It can also distinguish non-repeating angular position signals of 1 - 10800 turns. In this way, a single turn is completed by the light sensing principle to obtain high-precision position information, and multiple turns are completed by the magnetic induction principle to obtain the turn position information. This combination method can achieve high-precision measurement on a small-sized encoder.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magneto-optical induction multi-turn gear set encoder, characterized in that, It includes an encoder housing (2) with a top cover (3) provided on the encoder housing (2). A waterproof sheath (5) is provided on one side of the outer surface of the encoder housing (2). A wire anti - detachment mechanism (1) for locking a data cable (6) is provided on one side of the waterproof sheath (5). The wire anti - detachment mechanism (1) includes an outlet sleeve (101). The outlet sleeve (101) is provided on one side of the waterproof sheath (5). A locking ring (103) is provided on the outer surface of the outlet sleeve (101). The locking ring (103) is connected to the outlet sleeve (101) by threads. An inclined chamfer portion (104) is provided on one side of the inner surface of the locking ring (103). The outlet sleeve (101) is also provided with a plurality of collet assemblies that automatically fix the data cable (6) as the locking ring (103) moves. Wherein, a main shaft (4) is provided in the middle of the housing. A central gear (44) is provided on the main shaft (4). The central gear (44) meshes with a first gear (42), a second gear (43), and a third gear (45) respectively. Magnetic pole structures are provided on the lower sides of the first gear (42), the second gear (43), and the third gear (45).

2. The photo-magnetic induction type multi-turn gear set encoder according to claim 1, wherein The collet assembly includes a locking rod (108). The locking rod (108) is provided in a guiding hole (105). The guiding hole (105) is provided in a mounting groove. The mounting groove is provided on the outer surface of the outlet sleeve (101). An arc - shaped wedge block (102) corresponding to the inclined chamfer portion (104) is provided at the end of the locking rod (108).

3. The optical magnetic induction type multi-turn gear set encoder according to claim 2, characterized in that, A clamping block (107) is provided at the bottom of the locking rod (108). A return spring (106) is provided on the outer surface of the locking rod (108). One end of the return spring (106) is connected to the locking rod (108), and the other end of the return spring (106) is connected to the guiding hole (105).

4. The magneto-optical induction multi-turn gear set encoder according to claim 1, wherein The diameter of the first gear (42) is larger than the diameter of the second gear (43). The diameter of the second gear (43) is larger than the diameter of the third gear (45).

5. The optical magnetic induction type multi-turn gear set encoder according to claim 1, characterized in that, The magnetic pole structure includes a cylindrical pin (421). The cylindrical pin (421) is connected to the first gear (42), the second gear (43), and the third gear (45) through a bearing sleeve (422). Magnetic isolation rings (425) are provided on the outer surfaces of the first gear (42), the second gear (43), and the third gear (45). Upper magnets (423) and lower magnets (424) are provided on both sides of the first gear (42), the second gear (43), and the third gear (45) respectively.

6. The magneto-optical induction type multi-turn gear set encoder according to claim 5, characterized in that, Magnetic induction chips are provided on the magneto - electric PCB boards (25) on the lower sides of the first gear (42), the second gear (43), and the third gear (45). The magneto - electric PCB boards (25) are provided at the bottom of the upper support pillar (21).

7. The optical magnetic induction multi-turn gear set encoder according to claim 1, wherein, A code tray (23) is provided at the bottom of the main shaft (4). A tray seat is provided at the bottom of the code tray (23).

8. The magneto-optical induction type multi-turn gear set encoder according to claim 6, wherein, A lower support pillar (22) is provided on the lower side of the magnetoelectric PCB board (25), an optoelectronic PCB board (24) is provided at the bottom of the lower support pillar (22), and a photosensitive chip is provided on the optoelectronic PCB board (24).

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