High-precision rotary encoder

Abstract

The invention discloses a high-precision rotary encoder. The high-precision rotary encoder comprises a top cover, the shell is arranged at the bottom end of the top cover, and the shell and the top cover are fixed through bolts; an abutting assembly is arranged in the shell, the abutting assembly is composed of an adjusting piece and a limiting piece, the limiting piece is arranged at the bottom of the adjusting piece, the limiting piece is fixedly connected with the interior of the shell, the inner wall of the shell extends downwards from an opening to be provided with a threaded part, and the adjusting piece is in threaded connection with the threaded part. An annular code disc is also arranged in the shell; through the design, radial runout can be avoided, measurement errors can be reduced, the position of the code disc can be monitored in real time, once radial displacement occurs, the radial displacement can be known in time, measurement errors caused by runout can be avoided, meanwhile, the structure of the rotary encoder is designed, the monitoring structure is prevented from being interfered by the outside, and the measurement accuracy is improved. The anti-interference performance of the encoder is improved, and the defects of an existing structure in use are overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of rotary encoders, and in particular relates to a high-precision rotary encoder. Background Art

[0002] The rotary encoder is a device used to measure the rotation speed and can achieve fast speed regulation with PWM technology. The photoelectric rotary encoder can convert the mechanical quantities such as angular displacement and angular velocity of the output shaft into corresponding electrical pulses and output them as digital quantities through photoelectric conversion. It is divided into single-channel output and dual-channel output. The technical parameters mainly include the number of pulses per revolution and the power supply voltage. Single-channel output means that the output of the rotary encoder is a group of pulses, while the dual-channel output rotary encoder outputs two groups of A / B pulses with a phase difference of 90 degrees. These two groups of pulses can not only measure the rotation speed, but also determine the direction of rotation.

[0003] When the existing rotary encoder runs at high speed, the code disk often experiences radial jumps, and these jumps will affect the illumination range of the light source on the code channel. Therefore, a rotary encoder and a displacement measuring device are disclosed in the announcement number CN108844560B. This patent avoids the measurement error caused by radial jumps by changing the circular code channel into a trapezoidal code channel with an angle. However, the overall structure of this improvement is simple, and there is still a risk of radial jumps during use. There is no subsequent detection and protection means, so there are great limitations in actual use and there is room for improvement. Summary of the invention

[0004] The object of the present invention is to provide a high-precision rotary encoder to solve the problem that the existing method for preventing radial runout of a code disc mentioned in the above background technology has a simple structure and cannot perform real-time detection and protection functions.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision rotary encoder, comprising a top cover; a shell, which is arranged at the bottom end of the top cover, and the two are fixed by bolts; a tightening assembly is arranged inside the shell, and the tightening assembly is composed of an adjusting member and a limiting member, wherein the limiting member is arranged at the bottom of the adjusting member, and the limiting member is fixedly connected to the inside of the shell, and the inner wall of the shell extends downward from the opening to open a threaded portion, and the adjusting member is threadedly connected to the threaded portion, and an annular code disk is also arranged inside the shell, which is placed between the adjusting member and the limiting member and is against the two, and the radial and axial movement of the annular code disk is limited by adding a tightening assembly inside the shell, thereby improving the measurement accuracy, and at the same time, the structure is also very simple, convenient for processing and production, and has good promotion; and also includes a detection assembly, which is placed between the limiting member and the adjusting member, and is separately sleeved on the outside of the annular code disk, and the detection assembly is equidistant from each point on the outer periphery of the annular code disk, so when the annular code disk has radial runout, it will be detected by the detection assembly to remind the staff.

[0006] As a preferred technical solution in the present invention, the limiting member is a limiting ring fixed on the inner wall of the outer shell, and the adjusting member is a resist ring, which is threadedly connected to the threaded part, so as to adjust the width between the limiting ring and the resist ring according to the thickness of the annular code disk.

[0007] As a preferred technical solution in the present invention, the opposing surfaces of the retaining ring and the limiting ring both have inclined surfaces, which abut against the two end edges of the annular code disk, thereby limiting the radial position of the annular code disk, and the end longitudinal sections of the retaining ring and the limiting ring are trapezoidal.

[0008] As a preferred technical solution in the present invention, an annular groove is further provided on the inner wall of the shell, a wiring hole penetrating the shell is provided in the annular groove, and the detection component includes an annular position sensor built into the annular groove, an end of the annular position sensor passes through the wiring hole and is connected to an external receiving device, and the radial position of the annular code disk is detected by the annular position sensor, and once a change occurs, the numerical value is transmitted to the external receiving device.

[0009] As a preferred technical solution in the present invention, a placement groove is provided on the outer surface of the shell, and a copper wire is screwed into the placement groove to reduce the interference of external signals and the like on the internal structure of the shell.

[0010] As a preferred technical solution in the present invention, a protective shell is provided on the outside of the shell, and the protective shell completely covers the copper wire, thereby protecting the copper wire and avoiding damage caused by exposure to the outside.

[0011] As a preferred technical solution in the present invention, a guide groove is provided on the surface of the protective shell, and a pull strip is also bonded to the surface of the protective shell. The pull strip is arranged adjacent to the guide groove. When the protective shell needs to be replaced later, the protective shell can be torn and separated from the direction of the guide groove by pulling the pull strip.

[0012] As a preferred technical solution in the present invention, a hole is formed on the copper wire, and an electric wire is connected to the hole. The protective shell is also formed with a hole through which the power supply line passes.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Through the design of the present invention, not only can radial runout be avoided and measurement errors be reduced, but the position of the code disk can also be monitored in real time. Once radial displacement occurs, it can be learned in time to avoid measurement errors caused by runout. At the same time, the structure of the rotary encoder is designed to avoid external interference to the monitoring structure, improve the anti-interference performance of the encoder, and improve the shortcomings of the existing structure in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention when the protective shell is removed;

[0017] Figure 3 It is a schematic diagram of the structure of the housing of the present invention;

[0018] Figure 4 It is a cross-sectional view of the housing of the present invention.

[0019] In the figure:

[0020] 100, top cover; 101, electric wire; 102, housing; 103, copper wire; 104, placement groove; 105, wiring hole; 106, threaded portion; 107, retaining ring; 108, limiting ring; 109, ring groove; 110, annular position sensor;

[0021] 200, protective shell; 201, pull rod; 202, guide groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figures 1 to 4 The present invention provides a technical solution: a high-precision rotary encoder, comprising

[0024] Top cover 100;

[0025] The housing 102 is disposed at the bottom end of the top cover 100, and the two are fixed by bolts;

[0026] The housing 102 is provided with a tightening assembly, which is composed of an adjusting member and a limiting member.

[0027] The limiter is arranged at the bottom of the adjusting member, and the limiter is fixedly connected to the inside of the housing 102. The inner wall of the housing 102 extends downward from the opening to form a threaded portion 106, and the adjusting member is threadedly connected to the threaded portion 106. An annular code disk is also arranged inside the housing 102, and the annular code disk is placed between the adjusting member and the limiter, and abuts against the two. By adding a tightening component inside the housing 102 to limit the radial and axial movement of the annular code disk, the measurement accuracy is improved. At the same time, this structure is also very simple, convenient for processing and production, and has good promotion.

[0028] It also includes a detection component, which is placed between the limit part and the adjustment part, and is separately sleeved on the outside of the annular code disk. The detection component is equidistant from each point on the outer circumference of the annular code disk. Therefore, when the annular code disk has radial runout, it will be detected by the detection component to alert the staff.

[0029] In this embodiment, the limiting member is a limiting ring 108 fixed to the inner wall of the outer shell 102, and the adjusting member is a resist ring 107, which is threadedly connected to the threaded portion 106, so as to adjust the width between the limiting ring 108 and the resist ring 107 according to the thickness of the annular code disk.

[0030] In this embodiment, the opposing surfaces of the support ring 107 and the limiting ring 108 have inclined surfaces, which abut against the two end edges of the annular code disk, thereby limiting the radial position of the annular code disk. The end longitudinal sections of the support ring 107 and the limiting ring 108 are trapezoidal.

[0031] In this embodiment, an annular groove 109 is further provided on the inner wall of the outer shell 102, and a wiring hole 105 that passes through the outer shell 102 is provided in the annular groove 109. The detection component includes an annular position sensor 110 built into the annular groove 109, and the end of the annular position sensor 110 passes through the wiring hole 105 and is connected to an external receiving device. The radial position of the annular code disk is detected by the annular position sensor 110, and once a change occurs, the value is transmitted to the external receiving device.

[0032] In this embodiment, a placement groove 104 is provided on the outer surface of the housing 102 , and a copper wire 103 is screwed into the placement groove 104 . The copper wire 103 reduces interference of external signals and the like on the internal structure of the housing 102 .

[0033] In this embodiment, a protective shell 200 is provided on the outside of the housing 102, and the protective shell 200 completely covers the copper wire 103, thereby protecting the copper wire 103 and preventing the copper wire 103 from being damaged by being exposed to the outside.

[0034] In this embodiment, a guide groove 202 is provided on the surface of the protective shell 200, and a pull strip 201 is also bonded to the surface of the protective shell 200. The pull strip 201 is arranged adjacent to the guide groove 202. When the protective shell 200 needs to be replaced later, the protective shell 200 can be torn and separated from the direction of the guide groove 202 by pulling the pull strip 201.

[0035] In this embodiment, a hole is formed on the copper wire 103 , and the electric wire 101 is connected to the hole. The protective shell 200 also has a hole formed on it, through which the power supply wire 101 passes.

[0036] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision rotary encoder, characterized in that: include Top cover (100); The housing (102) is arranged at the bottom end of the top cover (100), and the two are fixed by bolts; A tightening assembly is arranged inside the housing (102), and the tightening assembly is composed of an adjusting member and a limiting member, wherein The limiting member is arranged at the bottom of the adjusting member, and the limiting member is fixedly connected to the inside of the housing (102); the inner wall of the housing (102) extends downward from the opening to form a threaded portion (106); the adjusting member is threadedly connected to the threaded portion (106); an annular code disk is also arranged inside the housing (102); the annular code disk is placed between the adjusting member and the limiting member, and abuts against the two; It also includes a detection component, which is placed between the limiter and the adjustment component and is separately sleeved on the outside of the annular code disk. The detection component is equidistant from each point on the outer periphery of the annular code disk.

2. A high-precision rotary encoder according to claim 1, characterized in that: The limiting member is a limiting ring (108) fixed to the inner wall of the outer shell (102), and the adjusting member is a retaining ring (107), and the retaining ring (107) is threadedly connected to the threaded portion (106).

3. A high-precision rotary encoder according to claim 2, characterized in that: The opposing surfaces of the retaining ring (107) and the limiting ring (108) both have inclined surfaces, which abut against the two end edges of the annular code disk. The longitudinal sections of the ends of the retaining ring (107) and the limiting ring (108) are trapezoidal.

4. A high-precision rotary encoder according to claim 2, characterized in that: The inner wall of the housing (102) is also provided with an annular groove (109), and a wiring hole (105) penetrating the housing (102) is provided in the annular groove (109). The detection component includes an annular position sensor (110) built into the annular groove (109), and the end of the annular position sensor (110) passes through the wiring hole (105) and is connected to an external receiving device, and the radial position of the annular code disk is detected by the annular position sensor (110).

5. A high-precision rotary encoder according to claim 1, characterized in that: The outer surface of the housing (102) is provided with a placement groove (104), and a copper wire (103) is screwed into the placement groove (104).

6. A high-precision rotary encoder according to claim 5, characterized in that: The outer portion of the housing (102) is covered with a protective shell (200), and the protective shell (200) completely covers the copper wire (103).

7. A high-precision rotary encoder according to claim 6, characterized in that: A guide groove (202) is provided on the surface of the protective shell (200), and a pull strip (201) is also bonded to the surface of the protective shell (200), and the pull strip (201) is arranged adjacent to the guide groove (202).

8. A high-precision rotary encoder according to claim 7, characterized in that: The copper wire (103) is provided with a hole, into which a power line (101) is connected, and the protective shell (200) is also provided with a hole through which the power line (101) passes.

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