Photoelectric encoder

Abstract

The photoelectric encoder comprises a protective shell and a top end structure, the protective shell is installed at the bottom of the top end structure, plug-in mounting columns are integrally and fixedly installed in the middle of the top of the protective shell at equal intervals, and locking holes are formed in the tops of the side faces of the plug-in mounting columns. The outer ring of the protruding part of the middle of the top end structure is sleeved with a bearing, rotating rods are fixedly installed on the outer wall of the bearing at equal intervals, and locking strips are fixedly connected to the ends of the rotating rods. When the encoder is used, no bolt fastener is used, firstly, on-site installation and later maintenance work are more convenient, meanwhile, no fastener is used, and the problem that in the prior art, fasteners are prone to being rusted for a long time, and use of the encoder is affected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photoelectric encoders, and particularly relates to a photoelectric encoder. Background Art

[0002] A photoelectric encoder is a sensor that converts the mechanical geometric displacement on the output shaft into pulses or digital quantities through photoelectric conversion. This is the most widely used sensor. A photoelectric encoder is composed of a light source, an optical code disk, and photosensitive elements. The grating disk is evenly provided with a number of rectangular holes on a circular plate with a certain diameter. Since the optical code disk is coaxial with the motor, when the motor rotates, the grating disk rotates at the same speed as the motor. The detection device composed of electronic components such as light-emitting diodes detects and outputs a number of pulse signals. By calculating the number of pulses output by the photoelectric encoder per second, the current rotational speed of the motor can be reflected.

[0003] When the existing photoelectric encoders are used outdoors, in areas with large dust or heavy rainfall, they usually cannot achieve a relatively long service life, and the maintenance or replacement frequency is relatively high, making them inconvenient to use. Therefore, it is urgent to propose an improvement plan to solve the above problems. For the waterproof and dustproof functions of photoelectric encoders, the current technical solutions all use rubber rings to achieve a sealing effect between the outer shell and the internal structure of the encoder. Although the rubber ring technical solution can achieve waterproof and dustproof, its defects and problems are also obvious. For example, when the external protective shell is sleeved, the inside of the protective shell is in contact with the outer wall of the rubber ring. Therefore, when the outer shell is continuously pushed, sliding friction is generated between the outer shell and the rubber ring, which will not only cause wear to the rubber ring, but also drive the rubber ring to move when the outer shell is moved, resulting in misalignment or even detachment from the installation groove structure, thus affecting the subsequent sealing function.

[0004] Therefore, we propose a photoelectric encoder to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a photoelectric encoder to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A photoelectric encoder includes a protective outer shell and a top end structure. The protective outer shell is installed at the bottom of the top end structure. The middle part of the top of the protective outer shell is integrally and fixedly installed with insertion columns at equal intervals. The top of the side of the insertion column is provided with locking holes. A bearing is sleeved on the outer ring of the protruding part in the middle of the top end structure. Rotating rods are fixedly installed on the outer wall of the bearing at equal intervals. A locking strip is fixedly connected to the end of the rotating rod.

[0008] Preferably, through-hole structures matching the insertion columns are equidistantly arranged at the top edge position of the top end head structure, and the top of the insertion column penetrates through the through-hole structure and extends to the outside of the top of the top end head structure.

[0009] Preferably, the inner cavity size of the locking hole is the same as the outer wall size of the locking strip, and a chamfered slope is arranged at the end position of the locking strip.

[0010] Preferably, a tension spring is sleeved on the outer ring of the insertion column, and a sealing rubber ring is fixedly installed at the top of the protective housing.

[0011] Preferably, both ends of the tension spring respectively abut against the bottom of the top end head structure and the top of the protective housing, and the sealing rubber rings are respectively located on both sides of the insertion column.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. For this photoelectric encoder, when in use, no bolt fasteners are used. Firstly, for on-site installation and later maintenance and repair work, it is more convenient. At the same time, without the use of any fasteners, there will be no problem that the fasteners in the prior art are prone to rusting over a long time and affecting the use of the encoder.

[0014] 2. For this photoelectric encoder, when the sealing rubber ring is compressed and deformed, it can better fit against the bottom of the top end head structure through its extrusion deformation, achieving overall sealing, effectively solving the problem that in the prior art, the rubber ring is prone to dislocation and slippage, affecting the waterproof and dustproof performance in later use, and then affecting the normal use of the photoelectric encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is an exploded view of the structure of the present utility model;

[0017] Figure 3 is the present utility model Figure 2 The enlarged view of the structure at A in.

[0018] In the figure: 1. Protective housing; 2. Top end head structure; 3. Insertion column; 4. Locking hole; 5. Tension spring; 6. Sealing rubber ring; 7. Bearing; 8. Rotating rod; 9. Locking strip; 10. Chamfered slope. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] The present utility model provides a technical solution for an optoelectronic encoder:

[0021] Embodiment:

[0022] As Figure 1 and Figure 2 shown, the optoelectronic encoder mainly includes a protective housing 1 and a top end structure 2.

[0023] As Figure 2 shown, at equal intervals on the middle position of the top of the protective housing 1, insertion columns 3 are fixedly installed, and locking holes 4 are provided at the top position on the side of the insertion columns 3.

[0024] Among them, on the top of the protective housing 1 and at both sides of the insertion columns 3, sealing rubber rings 6 are fixedly bonded. As Figure 3 shown, a tension spring 5 is sleeved on the outer ring of the insertion columns 3, and the tension spring 5 is located between the two sealing rubber rings 6.

[0025] Among them, as Figure 2 shown, at the top edge position of the top end structure 2, a pupil structure for matching the insertion columns 3 is provided. On the outer ring of the middle convex structure of the top end structure 2, a bearing 7 is installed, and on the outer ring of the bearing 7, a locking strip 9 is installed through a rotating rod 8.

[0026] Among them, one end of the locking strip 9 is provided with an inclined chamfer 10, and the outer dimension of the locking strip 9 is the same as the inner dimension of the locking hole 4.

[0027] In this embodiment, during the initial installation work, when installing the protective housing 1 at the bottom of the top end structure 2, directly align each insertion post 3 on the protective housing 1 with the through holes on the top end structure 2, and insert the insertion posts 2 into the through holes on the top end structure 2 until the top of the insertion post 3 penetrates through the top of the top end structure 2. Then, turn the rotating rod 8, which drives the locking strip 9 to move along an arc-shaped path. When the locking strip 9 rotates, it directly inserts into the locking hole 4 opened at the top side of the insertion post 3. And relying on the bevel chamfer, it gradually supports and pulls the insertion post 3 upward, causing the insertion post 3 to move upward and continuously pulling the protective housing 1 closer to the bottom of the top end structure 2 through the insertion post 3. At this time, the assembly work is completed. When the encoder of this technical solution is in use, no bolt fasteners are used. Firstly, for on-site installation and subsequent maintenance and repair work, it is more convenient. At the same time, without the use of any fasteners, there will be no problem that the fasteners in the prior art are prone to rust over a long time, affecting the use of the encoder.

[0028] When installing the protective housing 1, as the protective housing 1 is continuously pulled into the top end structure 2 by the insertion post 3, both the tension spring 5 and the sealing rubber ring 6 are continuously compressed and deformed. The tension spring 5 can provide a downward force for the insertion post 3, that is, it can increase the friction between the insertion post 3 and the locking strip 9, providing stability for the entire encoder structure. Secondly, when the sealing rubber ring 6 is compressed and deformed, it can better fit the bottom of the top end structure 2 through its extrusion deformation, achieving overall sealing, effectively solving the problem that in the prior art, the rubber ring is prone to dislocation and slippage, affecting the waterproof and dustproof performance in later use, and then affecting the normal use of the photoelectric encoder.

[0029] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] 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 principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photoelectric encoder, comprising a protective housing (1) and a top end structure (2), characterized in that: The protective shell (1) is installed at the bottom of the top end structure (2), and a plug-in column (3) is fixedly installed in an integrated manner at an equal distance in the middle of the top of the protective shell (1), and a locking hole (4) is opened at the top of the side of the plug-in column (3). A bearing (7) is mounted on the outer ring of the protruding part in the middle of the top end structure (2), and a rotating rod (8) is fixedly installed at an equal distance on the outer wall of the bearing (7), and a locking strip (9) is fixedly connected to the end position of the rotating rod (8).

2. A photoelectric encoder according to claim 1, characterized in that: Through-hole structures matching the insertion columns (3) are provided at equal distances at the top edge of the top end structure (2); the top of the insertion column (3) passes through the through-hole structure and extends to the outside of the top of the top end structure (2).

3. A photoelectric encoder according to claim 1, characterized in that: The inner cavity size of the locking hole (4) is the same as the outer wall size of the locking strip (9), and the end of the locking strip (9) is provided with a chamfer (10).

4. A photoelectric encoder according to claim 1, characterized in that: A tension spring (5) is sleeved on the outer ring of the insertion column (3), and a sealing rubber ring (6) is fixedly installed on the top of the protective shell (1).

5. A photoelectric encoder according to claim 4, characterized in that: The two ends of the tension spring (5) respectively abut against the bottom of the top end structure (2) and the top of the protective housing (1), and the sealing rubber ring (6) is respectively located on both sides of the insertion column (3).

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