Multi-vernier addition type multi-circle mechanical gear encoder

Abstract

The utility model discloses a multi-vernier addition type multi-circle mechanical gear encoder which comprises a shell, a shell cavity is arranged in the shell, a frame is connected in the shell cavity in a sliding mode, a fixing assembly is arranged on the frame, the fixing assembly comprises a protruding round block welded to the bottom end of the frame, and the protruding round block is connected with the shell cavity in a sliding mode. A movable plate is slidably connected into the protruding round block, limiting holes are formed in the outer surface of the protruding round block at equal intervals, limiting grooves are formed in the inner surface of the groove at equal intervals, limiting rods are slidably connected into the limiting grooves, one end of each limiting rod is fixedly connected with the corresponding limiting block, and the limiting rods are sleeved with second springs. The sliding of a moving plate enables a limiting block to move, the movement of the limiting block enables a second spring to be compressed, along with the movement of the moving plate, the moving plate blocks a limiting hole, the limiting block moves into a limiting groove from a cavity, the frame is pulled, the frame is moved out of a shell cavity, then elements in the shell are exposed to the outside, and maintenance personnel can maintain the elements conveniently.

Description

Technical Field

[0001] The utility model relates to an encoder, in particular to a multi-vernier addition type multi-turn mechanical gear encoder. Background Art

[0002] At present, in the encoder industry, there are two main types of multi-turn encoders. The first type is in the form of a counter, which adds one for each positive rotation of the spindle and subtracts one for each reverse rotation. This method requires the product to be powered on before counting, and the power cannot be cut off during operation. If the power is cut off, the recorded number of turns will be lost. In this method, there is a variant that uses a battery or a Wiegand coil to continuously power the counter so that the recorded number of turns information is not lost. However, this method only reflects the relative number of turns of the product, not the absolute number of turns of the product, and there is unreliability in application. The second type is to use a gear set to reflect the absolute number of turns of the product. This gear set generally has a reduction gear set and a multi-stage photoelectric gear set. The reduction gear set reduces one turn of the spindle to 1 / n of the sensor chip through the gear ratio of the gear. This method will greatly reduce the resolution of the sensor chip. The multi-stage photoelectric gear set is continuously driven by gears one level at a time, and the transmission ratio between the previous gear and the next gear is 4:1. Gray code channels are engraved on each gear stage, and the Gray code information on each gear stage is read through photoelectric tubes and optical couplers, and then combined into the number of revolutions of the product as a whole. This method can obtain an infinite number of counted revolutions through the accumulated gears one level at a time. However, this method has the disadvantage of being larger in size when facing the counting of fewer revolutions. In addition, the number of revolutions counted must be an exponential multiple of 4, and the number of counted revolutions cannot be flexibly selected.

[0003] At present, for encoders, long-term operation will cause wear of the mechanical components inside the encoder, so regular maintenance of the components inside the encoder is required. However, the components inside the encoder are often fixed in the housing, which makes it too troublesome for maintenance personnel to maintain them, thereby affecting the normal use of the encoder. Utility Model Content

[0004] In view of the problems in the related art, the utility model proposes a multi-cursor addition type multi-turn mechanical gear encoder to overcome the above technical problems existing in the existing related art.

[0005] To this end, the specific technical solutions adopted by the utility model are as follows:

[0006] A multi-vernier additive multi-turn mechanical gear encoder, comprising a shell, a shell cavity is provided in the shell, a groove is provided on the bottom end of the shell cavity, one end of the groove extends to the outside of the shell, a terminal is welded on the outer surface of the shell, a frame is slidably connected in the shell cavity, a fixing component is provided on the frame, the fixing component comprises a protruding round block welded on the bottom end of the frame, the protruding round block is adapted to the groove, a cavity is provided in the protruding round block, a moving plate is slidably connected in the cavity, and the protruding round block is provided with a cavity, a moving plate is slidably connected in the cavity, and a moving plate is provided with a moving plate. Limiting holes are provided at equal distances on the surface, the limiting holes are communicated with the cavity, limiting grooves are provided at equal distances on the inner surface of the groove, limiting rods are slidably connected in the limiting grooves, one end of the limiting rod is fixedly connected to the limiting block, the limiting block matches the limiting hole, a second spring is sleeved on the limiting rod, the two ends of the second spring are respectively fixedly connected to the limiting block and the inner wall of the limiting groove, a counting component is provided in the frame, a side cover is provided at the top of the shell cavity, and the side cover is mounted on the shell by fastening bolts.

[0007] Furthermore, in order to enable the encoder to have a counting function, the counting component includes a side plate welded in the frame, the side plate is rotatably connected to a driving shaft, a driving gear is welded on one end of the driving shaft, a first magnetic steel is fixedly connected to the driving gear, an end of the side plate away from the driving shaft is rotatably connected to a driven wheel, a vernier gear is welded on one end of the driven wheel, a second magnetic steel is fixedly connected to the vernier gear, a circuit board is fixedly connected to the bottom end of the frame away from the side plate, a first magnetic sensitive chip is fixedly provided on the circuit board at a position flush with the first magnetic steel, and a second magnetic sensitive chip is fixedly provided on the circuit board at a position flush with the second magnetic steel.

[0008] Furthermore, in order to make the cursor gear rotate with the driving gear, the driving gear is meshed with the cursor gear.

[0009] Furthermore, in order to make the frame slide stably in the shell cavity, T-blocks are welded at equal distances on the outer surface of the frame, and T-slots matching the T-blocks are opened on the inner surface of the shell cavity, and the T-blocks are slidably connected to the T-slots.

[0010] Furthermore, in order to facilitate the movement of the movable plate, a pressing groove is opened on the bottom end of the protruding round block, and a pressing plate is slidably connected in the pressing groove. A moving rod is welded on the pressing plate, and one end of the moving rod extends into the cavity and is fixedly connected to the movable plate.

[0011] Furthermore, in order to stabilize the movable plate in the cavity, the top center of the cavity is fixedly connected to the movable plate via a first spring.

[0012] Furthermore, in order to limit the position of the limiting rod, the other end of the limiting rod extends outside the shell and is fixedly connected to the baffle.

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

[0014] 1. Remove the side cover from the shell by twisting the fastening bolts to expose the frame to the outside. At this time, slide the pressing plate into the pressing groove, so that the moving plate slides synchronously with the pressing plate. The sliding of the moving plate drives the limit block to move. The movement of the limit block compresses the second spring. As the moving plate moves, the moving plate blocks the limit hole, and then the limit block moves from the cavity to the limit groove. Pull the frame to move it out of the shell cavity, thereby exposing the components in the shell to the outside, which is convenient for maintenance personnel to maintain it.

[0015] 2. The first magnetic sensitive chip is used to collect the angle of the active gear, and the second magnetic sensitive chip is used to collect the angle of the vernier gear. The number of rotations of the active gear is calculated based on the angle of the active gear and the angle of the vernier gear, and a corresponding multi-turn position signal is generated. By using the active gear and the vernier gear, a certain tooth number difference is set between the number of teeth of the active gear and the number of teeth of the vernier gear. After a certain number of rotations, the angle of the active gear and the angle of the vernier gear have a specific angle difference. The current number of rotations can be obtained by calculation, and then the number of rotations and the angle of the active shaft are combined and output, which is the multi-turn position data of the encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a multi-vernier additive multi-turn mechanical gear encoder according to an embodiment of the utility model;

[0018] Figure 2 It is a partial cross-sectional view of a multi-vernier additive multi-turn mechanical gear encoder according to an embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of a frame in a multi-vernier additive multi-turn mechanical gear encoder according to an embodiment of the utility model;

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5It is a cross-sectional view of a protruding round block in a multi-vernier additive multi-turn mechanical gear encoder according to an embodiment of the utility model;

[0022] Figure 6 It is a partial cross-sectional view of a housing in a multi-vernier additive multi-turn mechanical gear encoder according to an embodiment of the utility model;

[0023] Figure 7 yes Figure 6 Enlarged view of point B in the middle.

[0024] In the figure:

[0025] 1. Shell; 2. Shell cavity; 3. Side cover; 4. T-slot; 5. Frame; 6. T-block; 7. Side plate; 8. Driving shaft; 9. Driving gear; 10. First magnetic steel; 11. Driven wheel; 12. Vernier gear; 13. Second magnetic steel; 14. Circuit board; 15. First magnetic sensitive chip; 16. Second magnetic sensitive chip; 17. Terminal; 18. Protruding round block; 19. Cavity; 20. First spring; 21. Moving plate; 22. Moving rod; 23. Pressing groove; 24. Pressing plate; 25. Limiting hole; 26. Groove; 27. Limiting groove; 28. Limiting block; 29. ​​Limiting rod; 30. Second spring; 31. Baffle. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] According to an embodiment of the utility model, a multi-vernier addition type multi-turn mechanical gear encoder is provided.

[0028] Embodiment 1;

[0029] like Figure 1-Figure 3 and Figure 5-Figure 7As shown, according to the embodiment of the utility model, the multi-vernier additive multi-turn mechanical gear encoder includes a shell 1 with a shell cavity 2 opened inside, a groove 26 is opened on the bottom end of the shell cavity 2, the groove 26 is communicated with the shell cavity 2, one end of the groove 26 extends to the outside of the shell 1, a terminal 17 is welded on the outer surface of the shell 1, the terminal 17 is communicated with the shell cavity 2, the wiring harness is connected to the interface on the circuit board 14 through the terminal 17, and the multi-turn position information generated by the multi-turn encoder is output, and a certain length of the wiring harness is reserved for the movement of the frame 5, the shell cavity 2 is slidably connected with the frame 5, the outer surface of the frame 5 is welded with T-blocks 6 at equal distances, and the inner surface of the shell cavity 2 is provided with T-blocks 6 connected to the T The T-slot 4 is matched with the block 6, and the T-slot 4 is slidably connected with the T-slot 4. A fixing component is provided on the frame 5, and the fixing component includes a protruding round block 18 welded on the bottom end of the frame 5, and the protruding round block 18 is matched with the groove 26. A cavity 19 is provided in the protruding round block 18, and a movable plate 21 is slidably connected in the cavity 19. A pressing groove 23 is provided on the bottom end of the protruding round block 18, and a pressing plate 24 is slidably connected in the pressing groove 23. A moving rod 22 is welded on the pressing plate 24, and one end of the moving rod 22 extends into the cavity 19 and is fixedly connected to the movable plate 21. The top center of the cavity 19 is fixedly connected to the movable plate 21 through a first spring 20, and the first spring 20 has The movable plate 21 is always lower than the limiting hole 25 under the elastic effect of the first spring 20 when the pressing plate 24 is not pressed. The limiting holes 25 are arranged at equal distances on the outer surface of the protruding round block 18. The limiting holes 25 are communicated with the cavity 19. The limiting grooves 27 are arranged at equal distances on the inner surface of the groove 26. The limiting grooves 27 are communicated with the grooves 26. The limiting rods 29 are slidably connected in the limiting grooves 27. One end of the limiting rod 29 is fixedly connected to the limiting block 28. The limiting block 28 matches the limiting hole 25. The other end of the limiting rod 29 extends to the outside of the housing 1 and is fixedly connected to the baffle 31. The limiting rod 29 is sleeved with a second spring 30. The two ends of the second spring 30 are respectively The side cover 3 is fixedly connected with the limit block 28 and the inner wall of the limit groove 27, and the side cover 3 is removed from the shell body 1 by twisting the fastening bolts, so that the frame 5 is exposed to the outside. At this time, the pressing plate 24 is slid into the pressing groove 23, so that the movable plate 21 slides synchronously with the pressing plate 24, and the sliding of the movable plate 21 drives the limit block 28 to move. The movement of the limit block 28 compresses the second spring 30. As the movable plate 21 moves, the movable plate 21 blocks the limit hole 25, and then the limit block 28 moves from the cavity 19 to the limit groove 27, and the frame 5 is pulled out to be removed from the shell cavity 2, so that the components in the shell body 1 are exposed to the outside, which is convenient for maintenance personnel to maintain it.

[0030] Embodiment 2:

[0031] See also Figure 1-Figure 4In order to make the encoder have a counting function, a counting component is provided in the frame 5, a side cover 3 is provided at the top of the shell cavity 2, and the counting component includes a side plate 7 welded in the frame 5, a driving shaft 8 is rotatably connected to the side plate 7, a driving gear 9 is welded on one end of the driving shaft 8, a first magnetic steel 10 is fixedly connected to the driving gear 9, an end of the side plate 7 away from the driving shaft 8 is rotatably connected to a driven wheel 11, a vernier gear 12 is welded on one end of the driven wheel 11, the vernier gear 12 is meshed with the driving gear 9, a second magnetic steel 13 is fixedly connected to the vernier gear 12, and the side plate in the frame 5 away from the driving shaft 8 is rotatably connected to the driven wheel 11. The bottom end of the circuit board 7 is fixedly connected to a circuit board 14, and a first magnetic sensitive chip 15 is fixedly arranged on the circuit board 14 at a position flush with the first magnetic steel 10, and a second magnetic sensitive chip 16 is fixedly arranged on the circuit board 14 at a position flush with the second magnetic steel 13. The first magnetic sensitive chip 15 collects the angle of the current driving gear 9 after a certain number of rotations relative to the initial angle position, and the second magnetic sensitive chip 16 collects the angle of the current cursor gear 12 after a certain number of rotations relative to the initial angle position. The circuit board 14 calculates the number of rotations of the current driving shaft 8 according to a preset algorithm, and then calculates the number of rotations and the driving shaft 8, that is, the current angle information of the driving gear 9, is combined into the final multi-turn absolute position data. Finally, the circuit board 14 converts the multi-turn absolute position data into a corresponding signal and outputs it. The final output signal type can be an analog signal, an SSI signal, an SPI signal, an RS485 signal, or a CANopen signal. The other end of the driving shaft 8 is provided with a side cover 3. A hole for the driving shaft 8 to rotate is provided on the side cover 3. The side cover 3 is mounted on the housing 1 by fastening bolts. The first magnetic sensitive chip 15 is provided to collect the angle of the driving gear 9, and the second magnetic sensitive chip 15 is provided to collect the angle of the driving gear 9. The chip 16 is configured to collect the angle of the vernier gear 12, calculate the number of rotations of the driving gear 9 according to the angle of the driving gear 9 and the angle of the vernier gear 12, and generate a corresponding multi-turn position signal. By using the driving gear 9 and the vernier gear 12, a certain tooth number difference is set between the number of teeth of the driving gear 9 and the number of teeth of the vernier gear 12. After a certain number of rotations, the angle of the driving gear 9 and the angle of the vernier gear 12 have a specific angle difference. The current number of rotations can be obtained by calculation, and then the number of rotations and the angle of the driving shaft 8 are combined and output, which is the multi-turn position data of the encoder.

[0032] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0033] In actual application, a first magnetic sensitive chip 15 is provided for collecting the angle of the driving gear 9, and a second magnetic sensitive chip 16 is provided for collecting the angle of the vernier gear 12. The number of rotations of the driving gear 9 is calculated according to the angle of the driving gear 9 and the angle of the vernier gear 12, and a corresponding multi-turn position signal is generated. By using the driving gear 9 and the vernier gear 12, a certain tooth number difference is set between the number of teeth of the driving gear 9 and the number of teeth of the vernier gear 12. After a certain number of rotations, the angle of the driving gear 9 and the angle of the vernier gear 12 have a specific angle difference. The current number of rotations can be obtained by calculation, and then the number of rotations and the angle of the driving shaft 8 are combined and output, which is the multi-turn position data of the encoder. When the components in the frame 5 are maintained, first, the fastening bolts are twisted to remove the side cover 3 from the shell 1 to expose the frame 5 to the outside, and secondly, the pressing plate 24 is slid into the pressing groove 23, so that the movable plate 21 moves with the pressing. The pressing plate 24 slides synchronously, and the sliding of the moving plate 21 drives the limit block 28 to move. The movement of the limit block 28 compresses the second spring 30. As the moving plate 21 moves, the moving plate 21 blocks the limit hole 25, thereby moving the limit block 28 from the cavity 19 to the limit groove 27, and pulling the frame 5 out of the shell cavity 2, thereby exposing the components in the shell 1 to the outside, which is convenient for maintenance personnel to maintain it. The maintained frame 5 is placed in the shell cavity 2, and the T-block 6 and the T-slot 4 are flush with each other. As the frame 5 moves, the protruding round block 18 contacts the limit block 28, and the limit block 28 is moved to the limit groove 27, and the second spring 30 is in a compressed state until the frame 5 is completely moved into the shell cavity 2. At this time, the limit hole 25 is flush with the limit groove 27, and under the action of the first spring 20, the limit block 28 moves into the cavity 19, thereby fixing the frame 5 in the shell cavity 2.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-vernier additive multi-turn mechanical gear encoder, comprising a housing (1), characterized in that: A shell cavity (2) is provided in the shell (1), a groove (26) is provided at the bottom end of the shell cavity (2), one end of the groove (26) extends to the outside of the shell (1), a terminal (17) is welded on the outer surface of the shell (1), a frame (5) is slidably connected in the shell cavity (2), a fixing component is provided on the frame (5), the fixing component comprises a protruding round block (18) welded to the bottom end of the frame (5), the protruding round block (18) is adapted to the groove (26), a cavity (19) is provided in the protruding round block (18), a movable plate (21) is slidably connected in the cavity (19), and limiting holes (25) are provided at equal distances on the outer surface of the protruding round block (18) The limiting hole (25) is communicated with the cavity (19), and limiting grooves (27) are arranged at equal distances on the inner surface of the groove (26). Limiting rods (29) are slidably connected in the limiting grooves (27), and one end of the limiting rod (29) is fixedly connected to a limiting block (28). The limiting block (28) matches the limiting hole (25). A second spring (30) is sleeved on the limiting rod (29), and two ends of the second spring (30) are respectively fixedly connected to the limiting block (28) and the inner wall of the limiting groove (27). A counting component is arranged in the frame (5), and a side cover (3) is arranged at the top end of the shell cavity (2), and the side cover (3) is mounted on the shell (1) by fastening bolts.

2. A multi-vernier additive multi-turn mechanical gear encoder according to claim 1, characterized in that: The counting assembly comprises a side plate (7) welded inside the frame (5); a driving shaft (8) is rotatably connected to the side plate (7); a driving gear (9) is welded to one end of the driving shaft (8); a first magnetic steel (10) is fixedly connected to the driving gear (9); a driven wheel (11) is rotatably connected to one end of the side plate (7) away from the driving shaft (8); a cursor gear (12) is welded to one end of the driven wheel (11); a second magnetic steel (13) is fixedly connected to the cursor gear (12); a circuit board (14) is fixedly connected to the bottom end of the frame (5) away from the side plate (7); a first magnetic sensitive chip (15) is fixedly provided on the circuit board (14) at a position flush with the first magnetic steel (10); and a second magnetic sensitive chip (16) is fixedly provided on the circuit board (14) at a position flush with the second magnetic steel (13).

3. A multi-vernier additive multi-turn mechanical gear encoder according to claim 2, characterized in that: The driving gear (9) is meshed with the cursor gear (12).

4. The multi-vernier additive multi-turn mechanical gear encoder according to claim 1, characterized in that: T-shaped blocks (6) are welded at equal distances on the outer surface of the frame (5), and T-shaped slots (4) matching the T-shaped blocks (6) are provided on the inner surface of the shell cavity (2), and the T-shaped blocks (6) are slidably connected to the T-shaped slots (4).

5. The multi-vernier additive multi-turn mechanical gear encoder according to claim 1, characterized in that: A pressing groove (23) is provided at the bottom end of the protruding round block (18), a pressing plate (24) is slidably connected in the pressing groove (23), a moving rod (22) is welded to the pressing plate (24), one end of the moving rod (22) extends into the cavity (19) and is fixedly connected to the moving plate (21).

6. The multi-vernier additive multi-turn mechanical gear encoder according to claim 5, characterized in that: The center of the top end of the cavity (19) is fixedly connected to the movable plate (21) via a first spring (20).

7. The multi-vernier additive multi-turn mechanical gear encoder according to claim 1, characterized in that: The other end of the limiting rod (29) extends outside the housing (1) and is fixedly connected to the baffle (31).

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