An anti-interference encoder with automatic compensation of signal attenuation

Abstract

The utility model relates to encoder technical field and disclose an anti -interference encoder with signal attenuation automatic compensation function, including the shell, the one end fixedly connected with the cover of shell, the cover is located the one end fixedly connected with the measurement subassembly and light source in the shell inside, the lateral wall of main shaft is fixedly connected with first stop disc, the lateral wall of first stop disc is in contact with measurement subassembly, one end of main shaft is fixed with code disc. In the utility model, through setting up measurement subassembly, the radial runout of encoder main shaft is measured in real time, avoids the signal attenuation automatic compensation function failure caused by the radial runout of encoder main shaft, through setting up first stop board, second stop board, coil support, buzzer and parts, the axial runout of main shaft is detected, when the larger amplitude runout occurs, excites buzzer, avoids the encoder to continue to use under the failure, leads to the situation of output error signal.

Description

Technical Field

[0001] This utility model relates to the field of encoder technology, and in particular to an anti-interference encoder with automatic signal attenuation compensation function. Background Technology

[0002] An encoder is a sensor that converts mechanical rotation or displacement into electrical signals. It can measure the displacement position or speed of mechanical parts during rotation or linear motion and convert it into a series of electrical signals.

[0003] However, when there is radial runout of the encoder spindle, the gap between the reading head and the scribe line will change periodically during rotation, and the signal amplitude will fluctuate violently. This will cause the signal to remain saturated or too weak at certain positions, resulting in compensation failure. During the use of the encoder, it will be difficult for the operator to clearly observe the operating status of the spindle. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art where radial runout of the encoder spindle leads to compensation failure, making it difficult for operators to clearly observe the spindle's usage during encoder operation. Therefore, this invention proposes an anti-interference encoder with automatic signal attenuation compensation function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An anti-interference encoder with automatic signal attenuation compensation function includes a housing, a cover fixedly connected to one end of the housing, a main shaft rotatably connected through the cover, a measuring component and a light source fixedly connected to one end of the cover inside the housing, a first abutment plate fixedly connected to the side wall of the main shaft, the side wall of the first abutment plate abutting against the measuring component, and a code disk fixed to one end of the main shaft.

[0007] The measuring assembly includes a main mounting frame fixedly connected to one end of the cover. Multiple sliding brackets are slidably connected through the side wall of the main mounting frame. A force sensor is fixedly connected through each sliding bracket. The measuring end of each force sensor is elastically connected to the outer wall of the main mounting frame through a first spring. A probe mechanism is fixedly connected to one end of each sliding bracket. The first abutment plate abuts against the side wall of the probe mechanism.

[0008] Preferably, the probing mechanism includes a roller bracket fixedly connected to one end of the sliding bracket, and each roller bracket is fixedly connected to multiple connecting shafts. A cylindrical roller is slidably sleeved on the side wall of each connecting shaft, and the side wall of the first abutment plate abuts against the side wall of the cylindrical roller.

[0009] Preferably, the main mounting frame has an overall circular structure, and the plurality of sliding brackets are distributed in a circular array on the side wall of the main mounting frame. Each roller bracket is an arc-shaped shell structure, and the plurality of connecting shafts on each roller bracket are equidistantly arranged along the arc direction.

[0010] Preferably, two second abutment plates are symmetrically fixedly connected to the side wall of the cylindrical roller, and the first abutment plate is located between the two second abutment plates.

[0011] Preferably, a first magnetic ring is fixedly connected to both ends of the cylindrical roller, and a second magnetic ring is slidably connected to both ends of the sidewall of the connecting shaft. Each second magnetic ring is elastically connected to the roller bracket by a second spring.

[0012] Preferably, the polarity of each second magnetic ring is the same as that of the adjacent face of the first magnetic ring on the same side.

[0013] Preferably, the measuring assembly further includes a coil support and a third magnetic ring. A coil is wound on the coil support, and the coil support is fixedly connected to a plurality of second abutments through a plurality of connecting rods. The third magnetic ring is embedded in one end of the cover.

[0014] Preferably, a shielding cover is fixedly connected to one end of the main mounting bracket near the code disk, the main shaft is rotatably connected to the shielding cover, a buzzer is fixed to the side wall of the outer casing, and the buzzer is electrically connected to the two ends of the coil on the coil bracket.

[0015] The beneficial effects of this utility model are:

[0016] 1. By setting up a measurement component to measure the radial runout of the encoder spindle in real time, it is convenient for staff to observe the operation of the spindle and avoid the failure of the automatic signal attenuation compensation function of the encoder due to the radial runout of the spindle.

[0017] 2. By setting up a first stop plate, a second stop plate, a coil bracket, a buzzer, and other components, the axial runout of the spindle is detected, and when a large runout occurs, the buzzer is activated to prevent the encoder from continuing to be used under faulty conditions, which could lead to the output of incorrect signals. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an anti-interference encoder with automatic signal attenuation compensation function proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the measurement component from the bottom view of an anti-interference encoder with automatic signal attenuation compensation function proposed in this utility model.

[0020] Figure 3This is a schematic diagram of the structure of the measurement component of an anti-interference encoder with automatic signal attenuation compensation function proposed in this utility model, with the main mounting bracket and shielding cover hidden at the bottom.

[0021] Figure 4 This is a schematic diagram of the sliding bracket and the probe mechanism in an anti-interference encoder with automatic signal attenuation compensation function proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the cylindrical roller portion in an anti-interference encoder with automatic signal attenuation compensation function proposed in this utility model.

[0023] Figure 6 This is a schematic diagram showing the connection between the main shaft and the first abutment plate in an anti-interference encoder with automatic signal attenuation compensation function proposed in this utility model.

[0024] Figure 7 This is a schematic diagram of the top view of the measurement component in an anti-interference encoder with automatic signal attenuation compensation function proposed in this utility model.

[0025] Figure 8 for Figure 3 An enlarged schematic diagram of the structure of part A in the middle.

[0026] Figure 9 This is a schematic diagram of the structure of the cover facing the inside of the outer shell of an anti-interference encoder with automatic signal attenuation compensation function proposed in this utility model.

[0027] In the diagram: 1. Outer shell; 2. Cover; 3. Main shaft; 4. Measuring assembly; 41. Main mounting bracket; 42. Sliding bracket; 43. Force sensor; 44. First spring; 45. Probing mechanism; 451. Roller bracket; 452. Connecting shaft; 453. Cylindrical roller; 454. Second abutment plate; 455. First magnetic ring; 456. Second magnetic ring; 457. Second spring; 46. Coil bracket; 47. Third magnetic ring; 48. Connecting rod; 49. Shielding cover; 5. Light source; 6. First abutment plate; 7. Encoder; 8. Buzzer. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Reference Figure 1 - Figure 3 as well as Figure 6An anti-interference encoder with automatic signal attenuation compensation function includes a housing 1. The encoder's circuit board, photodetector, baffle and other devices are installed inside the housing 1. A cover 2 is fixedly connected to one end of the housing 1. A main shaft 3 is rotatably connected through the cover 2. A measuring component 4 and a light source 5 are fixedly connected to one end of the cover 2 inside the housing 1. During the use of the encoder, the measuring component 4 measures the axial runout and radial runout of the main shaft 3, so that the operator can clearly observe the operation of the main shaft 3 and avoid continuing to use the main shaft 3 if it has a large runout. A first abutment 6 is fixedly connected to the side wall of the main shaft 3. The side wall of the first abutment 6 abuts against the measuring component 4. A code disk 7 is fixed to one end of the main shaft 3. When the main shaft 3 does not runout, the first abutment (6) lightly abuts against the measuring component 4 and can drive it to rotate.

[0030] The measuring component 4 includes a main mounting frame 41 fixedly connected to one end of the cover 2. Multiple sliding brackets 42 are slidably connected through the side wall of the main mounting frame 41. Each sliding bracket 42 is fixedly connected to a force sensor 43. The measuring end of the force sensor 43 can measure the magnitude of the applied force, and the measurement result is displayed on an electronic screen. This is existing technology and will not be described in detail here. The measuring end of each force sensor 43 is elastically connected to the outer wall of the main mounting frame 41 by a first spring 44. One end of each sliding bracket 42 is fixedly connected to a probe mechanism 45. A first abutment 6 abuts against the side wall of the probe mechanism 45. When the main shaft 3 experiences radial runout, the abutment 6 increases the resisting force of the probe mechanism 45 in the runout direction of the main shaft 3, thereby pushing the sliding bracket 42 to move.

[0031] Reference Figure 3 - Figure 5 The probing mechanism 45 includes a roller bracket 451 fixedly connected to one end of the sliding bracket 42. Each roller bracket 451 is fixedly connected to multiple connecting shafts 452. A cylindrical roller 453 is slidably sleeved on the side wall of each connecting shaft 452. The side wall of the first abutting plate 6 abuts against the side wall of the cylindrical roller 453. The friction is reduced by setting the cylindrical roller 453.

[0032] The main mounting frame 41 has an overall circular structure. Multiple sliding brackets 42 are arranged in a circular array on the side wall of the main mounting frame 41. Each roller bracket 451 has an arc-shaped shell structure. Multiple connecting shafts 452 on each roller bracket 451 are equidistantly arranged along the arc direction, so that the arrangement surface of the cylindrical rollers 453 fits more closely with the main shaft 3.

[0033] Two second abutment plates 454 are symmetrically fixedly connected to the side wall of the cylindrical roller 453. The distance between the two second abutment plates 454 is the maximum allowable runout range of the main shaft 3. The first abutment plate 6 is located between the two second abutment plates 454. When the main shaft 3 undergoes a large axial runout, the first abutment plate 6 will come into contact with the second abutment plate 454 as the runout amplitude increases, thereby driving the cylindrical roller 453 to slide along the connecting shaft 452.

[0034] Both ends of the cylindrical roller 453 are fixedly connected to a first magnetic ring 455, and both ends of the side wall of the connecting shaft 452 are slidably connected to a second magnetic ring 456. Each second magnetic ring 456 is elastically connected to the roller bracket 451 by a second spring 457. The second spring 457 supports and positions the cylindrical roller 453, so that the cylindrical roller 453 can be kept in the middle position of the connecting shaft 452 when the encoder is installed in any posture.

[0035] Each second magnetic ring 456 has the same polarity as the adjacent surface of the first magnetic ring 455 on the same side. Through the repulsive effect of the like poles of the second magnetic ring 456 and the first magnetic ring 455, the center positioning effect of the cylindrical roller 453 is further improved, and the cylindrical roller 453 can reduce friction during rotation by relying on magnetic levitation.

[0036] Reference Figure 7 - Figure 9 The measuring component 4 also includes a coil support 46 and a third magnetic ring 47. A coil is wound on the coil support 46. The coil support 46 is fixedly connected to a plurality of second abutments 454 by a plurality of connecting rods 48. The third magnetic ring 47 is embedded in one end of the cover 2. The axial runout of the main shaft 3 drives the cylindrical roller 453 to slide back and forth, thereby causing the coil support 46 to move closer and further away from the third magnetic ring 47, so that an induced current is generated in the coil.

[0037] Reference Figure 1 - Figure 2 A shielding cover 49 is fixedly connected to one end of the main mounting bracket 41 near the code disk 7. The main shaft 3 and the shielding cover 49 are rotatably connected through each other. A buzzer 8 is fixed to the side wall of the outer casing 1. The buzzer 8 is electrically connected to the two ends of the coil on the coil bracket 46. An induced current is generated in the coil to excite the buzzer 8.

[0038] In this utility model, when the main shaft 3 does not run out of space, the first abutment plate (6) lightly contacts the side wall of the cylindrical roller 453 and drives the cylindrical roller 453 to rotate. When the main shaft 3 runs out of space radially, the abutment plate 6 increases the force of the cylindrical roller 453 in the direction of the runout of the main shaft 3, thereby pushing the sliding bracket 42 to move. At this time, the first spring 44 is stretched by force, and the force sensor (43) detects and displays the measured value. The operator can observe the radial runout of the main shaft 3 by observing the measured value at different positions on the circumference.

[0039] When the spindle 3 does not experience axial runout, the second spring 457 supports and positions the cylindrical roller 453. The repulsive force between the second magnetic ring 456 and the first magnetic ring 455 further enhances the center positioning effect of the cylindrical roller 453. Furthermore, the cylindrical roller 453 is suspended by magnetic force, which reduces friction during rotation. When the spindle 3 experiences significant axial runout, the first abutment 6 will come into contact with the second abutment 454 as the runout increases, thereby causing the cylindrical roller 453 to slide along the connecting shaft 452. During this process, the second abutment 454 on the cylindrical roller 453 causes the coil support 46 to repeatedly approach and move away from the third magnetic ring 47. The change in magnetic flux induces a current in the coil and triggers the buzzer 8, prompting the staff to perform maintenance.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An anti-interference encoder with automatic signal attenuation compensation function, comprising a housing (1), a cover (2) fixedly connected to one end of the housing (1), and a main shaft (3) rotatably connected through the cover (2), characterized in that, The cover (2) is fixedly connected to a measuring component (4) and a light source (5) at one end inside the outer shell (1). A first abutment (6) is fixedly connected to the side wall of the main shaft (3). The side wall of the first abutment (6) is in contact with the measuring component (4). A code disk (7) is fixed at one end of the main shaft (3). The measuring component (4) includes a main mounting frame (41) fixedly connected to one end of the cover (2). Multiple sliding brackets (42) are slidably connected through the side wall of the main mounting frame (41). A force sensor (43) is fixedly connected through each sliding bracket (42). The measuring end of each force sensor (43) is elastically connected to the outer wall of the main mounting frame (41) through a first spring (44). A probe mechanism (45) is fixedly connected to one end of each sliding bracket (42). The first abutting plate (6) abuts against the side wall of the probe mechanism (45).

2. The anti-interference encoder with automatic signal attenuation compensation function according to claim 1, characterized in that, The probe mechanism (45) includes a roller bracket (451) fixedly connected to one end of the sliding bracket (42). Each roller bracket (451) is fixedly connected to a plurality of connecting shafts (452). A cylindrical roller (453) is slidably sleeved on the side wall of each connecting shaft (452). The side wall of the first abutment plate (6) abuts against the side wall of the cylindrical roller (453).

3. An anti-interference encoder with automatic signal attenuation compensation function according to claim 2, characterized in that, The main mounting bracket (41) has a circular structure. The multiple sliding brackets (42) are arranged in a circular array on the side wall of the main mounting bracket (41). Each roller bracket (451) has an arc-shaped shell structure. The multiple connecting shafts (452) on each roller bracket (451) are equidistant along the arc direction.

4. An anti-interference encoder with automatic signal attenuation compensation function according to claim 2, characterized in that, Two second abutment plates (454) are symmetrically fixedly connected to the side wall of the cylindrical roller (453), and the first abutment plate (6) is located between the two second abutment plates (454).

5. An anti-interference encoder with automatic signal attenuation compensation function according to claim 4, characterized in that, Both ends of the cylindrical roller (453) are fixedly connected to a first magnetic ring (455), and both ends of the side wall of the connecting shaft (452) are slidably connected to a second magnetic ring (456). Each second magnetic ring (456) is elastically connected to the roller bracket (451) by a second spring (457).

6. An anti-interference encoder with automatic signal attenuation compensation function according to claim 5, characterized in that, Each of the second magnetic rings (456) has the same polarity as the adjacent face of the first magnetic ring (455) on the same side.

7. An anti-interference encoder with automatic signal attenuation compensation function according to claim 4, characterized in that, The measuring component (4) also includes a coil support (46) and a third magnetic ring (47). The coil support (46) is wound with a coil and is fixedly connected to multiple second abutments (454) by multiple connecting rods (48). The third magnetic ring (47) is embedded in one end of the cover (2).

8. An anti-interference encoder with automatic signal attenuation compensation function according to claim 1, characterized in that, The main mounting bracket (41) is fixedly connected to a shielding cover (49) at one end near the code disk (7). The main shaft (3) and the shielding cover (49) are rotatably connected through each other. A buzzer (8) is fixed to the side wall of the outer shell (1). The buzzer (8) is electrically connected to the two ends of the coil on the coil bracket (46).

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