Encoder

Abstract

The utility model discloses an encoder, and relates to the technical field of electronic equipment, the encoder comprises a second fixed seat and a first fixed seat, the middle position of the second fixed seat is rotatably provided with an output shaft, the end portion of the output shaft is provided with a sun gear, the outer side of the sun gear is provided with an inner gear which is coaxially arranged, and the outer side of the inner gear is provided with a second fixed seat. The inner gear is fixedly connected with the second fixing seat through a positioning rod, a plurality of planetary gears are arranged between the inner gear and the sun gear, the planetary gears are meshed with the inner gear and the sun gear, the lower ends of the planetary gears are rotationally connected with an auxiliary rod, and the lower end of the auxiliary rod is rotationally connected with the upper end of a rotating ring; according to the utility model, the built-in transmission gear of the encoder is magnetized so as to be used for counting the number of turns of the multi-turn encoder, so that a method for resolving the number of turns of multiple turns is carried out, the defects of the existing device are overcome, and the later maintenance and replacement are also facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic equipment, in particular to an encoder. Background Art

[0002] The encoder converts displacement into a periodic electrical signal, and then converts this electrical signal into a counting pulse, with the number of pulses representing the corresponding rotation angle. Each position of the absolute encoder corresponds to a certain digital code, so its indication can instantly obtain the current position information, and is widely used in CNC machine tools, automatic control, aerospace, automation facilities and equipment. Multi-turn absolute rotary encoders, because each position is absolutely unique, anti-interference, and can save the number of turns in addition to the full circle angle, have been increasingly widely used in various industrial systems and control fields for angle, length measurement and positioning control.

[0003] Electronic lap counter: The principle of the lap pulse and counting register of this encoder is actually very simple, that is, the register installed inside the encoder is used to record and store the accumulation or decrement of the laps when the encoder rotates; this lap encoder generally needs to be equipped with a battery, and the role of the battery is to ensure that the encoder can continue to accumulate and record the laps when the power is off. The biggest advantage of this lap counting method is that its technology is relatively easy to implement and the hardware cost is relatively low; but at the same time, it also has a shortcoming that is often criticized by people, that is, it will cause the encoder to lose the lap record when the battery is out of power (or damaged). There are also lap counters based on the "Wiegand effect", but because this new type of lap counter has no large-scale application to prove the reliability of this technology, and the Wiegand effect coil is also another form of energy storage device, the same coil failure will still lose the lap record.

[0004] Mechanical lap counter: This type uses a deceleration mode similar to that of a mechanical clock. The central code disk where the shaft and the angle detection unit are installed is directly connected and drives the angle detection unit when rotating. The pulse count value of a single lap of the encoder can be obtained through the corresponding angle resolution unit. Through multiple sets of gear deceleration, as shown in the figure, assuming that the gear reduction ratio of the three sets used for the multi-lap detection unit is 16:1, the three sets of gears can eventually reach a count value of 4096 laps. Through three sets of multi-lap detection units and the corresponding lap resolution units, the number of laps can be calculated.

[0005] The counting routes of the above two multi-turn encoders use electronic turn counters, which are low-cost. However, this solution requires a battery, and there is a risk of battery failure and loss of turns.

[0006] Mechanical lap counters do not have the risk of losing laps due to battery failure, but they cost hundreds of dollars, which is 5 to 10 times the price of ordinary electronic lap counters.

[0007] Based on this, an encoder is now provided to eliminate the disadvantages of the existing devices. Utility Model Content

[0008] The purpose of the utility model is to provide an encoder to solve the problems in the background technology.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] An encoder comprises a second fixed seat and a first fixed seat, an output shaft is rotatably provided at the middle position of the second fixed seat, a sun gear is provided at the end of the output shaft, an internal gear is coaxially arranged on the outer side of the sun gear, the internal gear and the second fixed seat are connected and fixed by a positioning rod, a plurality of planetary gears are arranged between the internal gear and the sun gear, the planetary gears are meshed with the internal gear and the sun gear, the lower end of the planetary gear is rotatably connected to the auxiliary rod, the lower end of the auxiliary rod is rotatably connected to the upper end of the rotating ring, the rotating ring is rotatably arranged at the upper end of the second fixed seat, a magnetic plate is provided at the end of each planetary gear, the magnetic plate is connected to the planetary gear through a detachable mechanism, the second fixed seat and the first fixed seat are arranged in parallel, and a detection circuit is arranged on the surface of the first fixed seat facing the planetary gear.

[0011] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0012] In an optional solution: a plurality of reinforcing ribs are provided between the positioning rod and the second fixing seat.

[0013] In an optional solution, the number of the planetary gears is at least three.

[0014] In an optional solution: a plurality of mounting holes matching the auxiliary rods are provided at the upper end of the planetary gear.

[0015] In an optional scheme: the detachable mechanism includes a clamping groove arranged on the magnetic plate, the planetary gear is provided with a mounting notch matching the magnetic plate, the inner side wall of the mounting notch is provided with a side slot, each clamping groove is slidably provided with a toggle block, the lower end of the toggle block is connected to the movable slide through a connecting rod, the movable slide is connected to the bottom of the magnetic plate through a reset piece, the outer end of the movable slide is provided with a plurality of movable blocks for inserting into the side slots, and the lower end of the magnetic plate opposite to the movable slide is provided with a plurality of fixed blocks for inserting into the side slots on the other side.

[0016] In an optional solution: an anti-sliding block is arranged on the outer side of the toggle block.

[0017] In an optional solution: the ends of the fixed plug block and the movable plug block are provided with guiding slopes.

[0018] In an optional solution: a plurality of elastic pads are further provided at the lower end of the magnetic plate.

[0019] In an optional solution: the reset member includes a positioning block arranged at the middle position of the bottom of the magnetic plate, and a plurality of compression springs for connecting the movable slide bar are arranged on the side of the positioning block.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In the utility model, the gear of the built-in transmission of the encoder is magnetized so that it can be used for counting the number of turns of the multi-turn encoder, thereby performing a method for calculating the number of turns of the multi-turn encoder, which solves the shortcomings of the existing device and is convenient for later maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the other side of the utility model.

[0024] Figure 3 It is a structural schematic diagram of the upper end of the second fixing seat of the utility model.

[0025] Figure 4 This is a schematic diagram of the magnetic plate and planetary gear structure of the utility model.

[0026] Figure 5 It is a schematic diagram of the detachable mechanism structure of the utility model.

[0027] Notes on reference numerals: first fixing base 100, detection circuit 101;

[0028] The second fixed seat 200, the internal gear 201, the positioning rod 202, the output shaft 203, the rotating ring 204, the sun gear 205, and the planetary gear 206;

[0029] Magnetic plate 300 , clamping slide groove 301 , toggle block 302 , side slot 303 , installation notch 304 , movable slide bar 305 , movable plug block 306 , compression spring 307 , positioning block 308 , elastic pad 309 , fixed plug block 310 . DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] In one embodiment, Figure 1-Figure 5 As shown, an encoder includes a second fixed seat 200 and a first fixed seat 100, an output shaft 203 is rotatably provided in the middle position of the second fixed seat 200, a sun gear 205 is provided at the end of the output shaft 203, an inner gear 201 is coaxially arranged on the outer side of the sun gear 205, the inner gear 201 and the second fixed seat 200 are connected and fixed by a positioning rod 202, a plurality of planetary gears 206 are arranged between the inner gear 201 and the sun gear 205, the planetary gears 206 are meshed with the inner gear 201 and the sun gear 205, the lower end of the planetary gear 206 is rotatably connected to the auxiliary rod, the lower end of the auxiliary rod is rotatably connected to the upper end of the rotating ring 204, the rotating ring 204 is rotatably arranged at the upper end of the second fixed seat 200, and each planetary gear 206 is provided with a magnetic plate at the end 300, the magnetic plate 300 is connected to the planetary gear 206 through a detachable mechanism, the second fixing seat 200 and the first fixing seat 100 are arranged in parallel, and a detection circuit 101 is arranged on the surface of the first fixing seat 100 facing the planetary gear 206. When the output shaft 203 rotates, the sun gear 205 at the end of the output shaft 203 will also rotate, and the sun gear 205 cooperates with the planetary gear 206 to drive the magnetic plate 300 to rotate. The planetary gear 206 matches the internal gear 201, so that the planetary gear 206 revolves around the sun gear 205. The magnetic plate 300 on the planetary gear 206 matches the detection circuit 101 on the surface of the first fixing seat 100. As the planetary gear 206 revolves, a single magnetic plate 300 is transferred to the detection circuit 101 position, which triggers the detection circuit 101, thereby completing one count;

[0032] The detachable mechanism includes a clamping slide groove 301 arranged on the magnetic plate 300, a mounting notch 304 matching the magnetic plate 300 is provided on the planetary gear 206, a side slot 303 is provided on the inner wall of the mounting notch 304, a toggle block 302 is slidably provided on each clamping slide groove 301, an anti-sliding block is arranged on the outer side of the toggle block 302, the lower end of the toggle block 302 is connected to a movable slide bar 305 through a connecting rod, the movable slide bar 305 is connected to the bottom of the magnetic plate 300 through a reset member, and a plurality of movable plug-in blocks 306 for inserting into the side slots 303 are provided at the outer end of the movable slide bar 305, and the movable slide bar 305 is connected to the bottom of the magnetic plate 300 through a reset member. The lower end of the magnetic plate 300 opposite to the strip 305 is provided with a plurality of fixed plug blocks 310 for inserting into the side slot 303 on the other side. During the actual installation, the fixed plug block 310 is first inserted into the side slot 303. At this time, the magnetic plate 300 blocks the upper end of the installation notch 304. Then, the toggle block 302 is toggled to move the movable slide bar 305 toward the fixed plug block 310. When the movable plug block 306 is completely placed in the installation notch 304, the toggle block 302 is released. Under the action of the reset member, the movable plug block 306 is inserted into the installation notch 304, thereby completing the snap-in positioning. This detachable setting method is convenient for the subsequent magnetization operation.

[0033] The lower end of the magnetic plate 300 is also provided with a plurality of elastic pads 309. When the magnetic plate 300 is installed, the elastic pads 309 can provide a pre-tightening force to further improve the installation stability of the magnetic plate 300.

[0034] The reset member includes a positioning block 308 disposed at the middle position of the bottom of the magnetic plate 300, and a plurality of compression springs 307 for connecting the movable slide bar 305 are disposed on the side of the positioning block 308. Under the action of the compression springs 307, the movable slide bar 305 slides toward the outside to provide power for clamping;

[0035] The above embodiment discloses an encoder, wherein when the output shaft 203 rotates, the sun gear 205 at the end of the output shaft 203 also rotates, and the sun gear 205 cooperates with the planetary gear 206 to drive the magnetic plate 300 to rotate, and the planetary gear 206 matches the internal gear 201, so that the planetary gear 206 revolves around the sun gear 205, and the magnetic plate 300 on the planetary gear 206 matches the detection circuit 101 on the surface of the first fixed seat 100. As the planetary gear 206 revolves, a single magnetic plate 300 transfers to the position of the detection circuit 101, which triggers the detection circuit 101, thereby completing a count, the gear ratio of the sun gear 205 and the planetary gear 206 is A, the gear ratio of the planetary gear 206 and the internal gear 201 is B, the number of the planetary gears 206 is C, and the counted number of circles M=A*B / C.

[0036] The above is only a specific implementation method disclosed in this application, but the protection scope disclosed in this application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this application, which should be included in the protection scope disclosed in this application. Therefore, the protection scope disclosed in this application should be based on the protection scope of the claims.

Claims

1. An encoder, comprising a second fixed seat (200) and a first fixed seat (100), wherein an output shaft (203) is rotatably provided in the middle of the second fixed seat (200), and a sun gear (205) is provided at the end of the output shaft (203), characterized in that: An inner gear (201) is coaxially arranged outside the sun gear (205), and the inner gear (201) is connected and fixed to the second fixed seat (200) via a positioning rod (202). A plurality of planetary gears (206) are arranged between the inner gear (201) and the sun gear (205), and the planetary gears (206) are meshed with the inner gear (201) and the sun gear (205). The lower end of the planetary gear (206) is rotatably connected to the auxiliary rod, and the lower end of the auxiliary rod The second fixing seat (200) is rotatably connected to the upper end of the rotating ring (204), and the rotating ring (204) is rotatably arranged on the upper end of the second fixing seat (200). A magnetic plate (300) is provided at the end of each planetary gear (206), and the magnetic plate (300) is connected to the planetary gear (206) through a detachable mechanism. The second fixing seat (200) and the first fixing seat (100) are arranged in parallel, and a detection circuit (101) is arranged on the surface of the first fixing seat (100) facing the planetary gear (206).

2. The encoder according to claim 1, characterized in that A plurality of reinforcing ribs are provided between the positioning rod (202) and the second fixing seat (200).

3. The encoder according to claim 1, characterized in that The number of the planetary gears (206) is at least three.

4. The encoder according to claim 1, characterized in that The upper end of the planetary gear (206) is provided with a plurality of mounting holes matching the auxiliary rods.

5. The encoder according to claim 1, characterized in that The detachable mechanism comprises a clamping slide groove (301) arranged on the magnetic plate (300), a mounting notch (304) matching the magnetic plate (300) is arranged on the planetary gear (206), a side slot (303) is arranged on the inner wall of the mounting notch (304), a toggle block (302) is slidably arranged on each clamping slide groove (301), the lower end of the toggle block (302) is connected to a movable slide bar (305) through a connecting rod, the movable slide bar (305) is connected to the bottom of the magnetic plate (300) through a reset member, the outer end of the movable slide bar (305) is provided with a plurality of movable insert blocks (306) for inserting into the side slot (303), and the lower end of the magnetic plate (300) opposite to the movable slide bar (305) is provided with a plurality of fixed insert blocks (310) for inserting into the other side slot (303).

6. The encoder according to claim 5, characterized in that An anti-sliding block is arranged on the outer side of the toggle block (302).

7. The encoder according to claim 5, characterized in that The ends of the fixed plug block (310) and the movable plug block (306) are provided with guiding inclined surfaces.

8. The encoder according to claim 5, characterized in that A plurality of elastic pads (309) are also provided at the lower end of the magnetic plate (300).

9. The encoder according to claim 5, characterized in that The reset member comprises a positioning block (308) arranged at the middle position of the bottom of the magnetic plate (300), and a plurality of compression springs (307) for connecting the movable slide bar (305) are arranged on the side of the positioning block (308).

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