An easily detachable ultra-thin photoelectric encoder

Abstract

This utility model discloses an easily detachable ultra-thin photoelectric encoder, relating to the field of photoelectric encoder technology. The utility model includes a housing, with an encoder body fixedly connected to the bottom of the housing's inner cavity. An end cap assembly is disposed on the top of the housing, and an elastic release mechanism is provided within the inner cavity of the end cap assembly. The end cap assembly includes a mounting cover. Through the elastic snap-fit ​​structure inside the end cap assembly, when the mounting cover is fastened to the top of the housing, the limiting post is embedded into the limiting hole of the positioning frame under the action of a first spring, achieving rapid locking. Disassembly only requires pressing the limiting post to release the fixation, without the need for tools. This solves the problem of cumbersome disassembly of traditional bolted or welded structures. Simultaneously, the bottom of the mounting cover extends into the inner cavity of the positioning frame, cooperating with the limiting groove of the limiting block to form a double positioning, ensuring the relative position of the end cap and the housing is stable and preventing loosening due to vibration.

Description

Technical Field

[0001] This utility model belongs to the field of photoelectric encoder technology, and in particular relates to an easily detachable ultra-thin photoelectric encoder. Background Technology

[0002] As a core component for accurately measuring rotation angle and speed, photoelectric encoders are widely used in robot joints, precision machine tools, servo motors and other equipment. Ultra-thin photoelectric encoders have become the mainstream demand because they can adapt to narrow installation spaces. They not only need to meet the basic performance of high measurement accuracy, but also need to have features such as compact structure, convenient installation and strong maintainability to adapt to the efficient operation mode of modern production lines.

[0003] Chinese patent application CN214621231U discloses a photoelectric encoder that is easy to install and calibrate, including a bottom shell, a top shell, and a tube. The top shell is located on top of the bottom shell, and the tube is fixedly connected to the bottom left side of the bottom shell. This photoelectric encoder is easy to install and calibrate. The motor can be installed by placing the connecting block into the connecting groove inside the bottom of the top shell and rotating the fixing bolt. Alternatively, the top of the bottom shell can be brought into contact with the bottom of the top shell, aligning the insertion hole at the bottom of the top shell with the threaded hole inside the bottom shell, inserting the connecting bolt, and rotating the connecting bolt to complete the installation of the photoelectric encoder. Since the outer wall of the rotating shaft has threads, and the inner wall of the grating plate has threads that match the outer wall of the rotating shaft, rotating counterclockwise moves the grating plate to the bottom of the rotating shaft.

[0004] Because the aforementioned photoelectric encoders are bolted, special tools are required to disassemble multiple connectors when maintaining or replacing internal components. This operation is cumbersome and time-consuming, especially in mass production or on-site emergency repair scenarios, which seriously affects work efficiency. The bearing backlash elimination effect of the photoelectric encoder is poor and unstable. The traditional shim adjustment method relies on manual experience, which is not only complicated to operate, but also prone to over- or under-elimination of backlash due to uneven assembly force. At the same time, the rigid extrusion structure cannot adapt to the slight deformation caused by vibration, and the backlash is prone to recurrence after long-term use, affecting measurement accuracy.

[0005] To address these issues, we provide an easily detachable, ultra-thin photoelectric encoder. Utility Model Content

[0006] The purpose of this utility model is to provide an easily detachable ultra-thin photoelectric encoder. Through the cooperation of the end cover assembly and the elastic elimination mechanism, it solves the problems of low disassembly and installation efficiency and difficulty in meeting the needs of rapid maintenance caused by bolt fixing in the existing ultra-thin photoelectric encoder. The bearing clearance elimination method relies on manual labor and lacks dynamic adaptability, resulting in poor effect and instability.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to an easily detachable ultra-thin photoelectric encoder, comprising a housing, an encoder body fixedly connected to the bottom of the housing's inner cavity, an end cap assembly on the top of the housing, an elastic elimination mechanism within the end cap assembly's inner cavity, and a mounting cover on the top of the housing. Connecting blocks are fixedly connected to both sides of the mounting cover's inner cavity, and a first spring is fixedly connected to one side of each connecting block. A limiting post is fitted onto the surface of the first spring. Positioning frames are fixedly connected to both sides of the housing, and the bottom of the mounting cover extends into the inner cavity of the positioning frame. A limiting hole, which mates with the limiting post, is provided on one side of the positioning frame. The end cap assembly seals and protects the encoder body, preventing dust and impurities from entering the housing and affecting the encoder body's normal operation. The mounting cover covers the top of the housing, forming a closed space. The first spring has… With its elastic deformation capability, the limiting post extends and retracts under the action of the first spring. Positioning frames are fixedly connected to both sides of the outer shell, providing support for the positioning and fixation of the mounting cover. The bottom of the mounting cover extends into the inner cavity of the positioning frame. This nested structure provides initial positioning for the mounting cover, restricting its horizontal movement. When the mounting cover is placed on top of the outer shell, the limiting post automatically extends into the limiting hole under the elastic force of the first spring, thus firmly connecting the mounting cover to the outer shell. This enables rapid installation of the end cover assembly and the outer shell. When the mounting cover needs to be removed, simply press the limiting post inward to compress the first spring and disengage it from the limiting hole, easily removing the mounting cover from the top of the outer shell. The entire process requires no tools, is simple and quick, greatly improving the efficiency of encoder disassembly and installation, and facilitating maintenance and repair of the internal encoder body.

[0009] The present invention is further configured such that the elastic elimination mechanism includes two positioning holes, which are located on both sides of the top of the encoder body. A second spring is fixedly connected to the inner cavity of the positioning hole. An annular plate is fixedly connected to the top of the second spring, and an elastic washer is fixedly connected to the bottom of the annular plate. The positioning holes provide a stable mounting base for the second spring. The two positioning holes are symmetrically distributed to ensure balanced force. The elastic force of the second spring acts on the annular plate, causing the elastic washer at the bottom of the annular plate to fit tightly against the bearing, which can effectively eliminate bearing clearance, ensure the smooth rotation of the spindle, and improve the measurement accuracy of the encoder. At the same time, the elastic structure can adapt to the small deformation of the bearing under different working conditions, maintain the clearance elimination effect for a long time, and avoid wear or accuracy decay caused by rigid contact.

[0010] The present invention is further configured such that a bearing is provided on the top of the encoder body, and a spindle is provided through the inner cavity of the bearing. The bearing provides support for the spindle, reduces the frictional resistance when the spindle rotates, ensures the smoothness of the spindle rotation, and helps to improve the stability and accuracy of the encoded signal.

[0011] The present invention is further configured such that limiting blocks are fixedly connected to both sides of the outer shell, and a limiting groove is formed on the top of the limiting block. The bottom of the mounting cover extends into the inner cavity of the limiting groove. The limiting block and the structure of the bottom of the mounting cover extending into the limiting groove form an auxiliary positioning, which, in conjunction with the positioning frame, further restricts the horizontal displacement of the mounting cover and enhances the overall stability of the connection between the end cover assembly and the outer shell.

[0012] The present invention is further configured such that a connecting seat is fixedly connected to the bottom of one side of the housing, and a connector is fixedly connected to one side of the connecting seat. The connecting seat provides a stable mounting carrier for the connector, and the connector serves as a signal transmission interface, facilitating electrical connection between the encoder and external devices and ensuring the stability of signal transmission.

[0013] The present invention is further configured such that positioning posts are fixedly connected to both sides of the bottom of the annular plate. The positioning posts are disposed in the inner cavity of the second spring and play a guiding role in the extension and contraction direction of the second spring, preventing the second spring from shifting laterally or twisting when subjected to force, ensuring that the spring force can act stably on the annular plate along the axial direction, ensuring that the elastic elimination mechanism has a uniform and stable effect on eliminating bearing clearance, and avoiding the problem of uneven local force caused by abnormal spring deformation.

[0014] The present invention is further configured such that connecting holes are provided on both sides of the mounting cover, and one side of the limiting post extends into the inner cavity of the limiting hole through the connecting hole. The connecting hole provides a moving channel for the limiting post, so that the limiting post can smoothly pass through the connecting hole and extend into the limiting hole of the positioning frame, ensuring the precise fit between the limiting post and the limiting hole, and ensuring the reliable connection between the end cover assembly and the outer shell.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model utilizes an elastic snap-fit ​​structure inside the end cap assembly. When the mounting cover is fastened to the top of the outer shell, the limiting post is embedded into the limiting hole of the positioning frame under the action of the first spring, achieving quick locking. During disassembly, simply pressing the limiting post is sufficient to release the fixation, eliminating the need for tools. This solves the problem of cumbersome disassembly of traditional bolt or welded structures. At the same time, the bottom of the mounting cover extends into the inner cavity of the positioning frame, working in conjunction with the limiting groove of the limiting block to form a double positioning, ensuring the relative position of the end cap and the outer shell is stable and preventing loosening caused by vibration.

[0017] 2. This utility model applies a continuous and adjustable preload to the bearing through the synergistic effect of the second spring and the annular plate. The elastic force of the second spring is transmitted to the elastic shim through the annular plate, which not only eliminates the initial clearance, but also compensates for the small displacement caused by temperature changes or vibration through its own deformation, thereby achieving dynamic clearance control. Compared with the traditional shim adjustment method, this mechanism does not require manual intervention and effectively improves the clearance elimination accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a perspective view of an easily detachable ultra-thin photoelectric encoder.

[0020] Figure 2 This is a perspective view of the housing of an easily detachable ultra-thin photoelectric encoder.

[0021] Figure 3 This is a perspective view of the mounting cover in an easily detachable ultra-thin photoelectric encoder.

[0022] Figure 4 This is a perspective view of the elasticity elimination mechanism in an easily detachable ultra-thin photoelectric encoder.

[0023] Figure 5 This is a bottom-view perspective view of the mounting cover in an easily detachable ultra-thin photoelectric encoder.

[0024] Figure 6 In an easily detachable ultra-thin photoelectric encoder Figure 5 A magnified view of part A.

[0025] In the attached diagram: 1. Housing; 2. Encoder body; 3. End cover assembly; 31. Mounting cover; 32. Connecting block; 33. First spring; 34. Limiting post; 35. Positioning frame; 36. Limiting hole; 4. Elasticity elimination mechanism; 41. Positioning hole; 42. Second spring; 43. Annular plate; 44. Elastic gasket; 5. Bearing; 6. Spindle; 7. Limiting block; 8. Limiting groove; 9. Connecting seat; 10. Connector; 11. Positioning post; 12. Connecting hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0027] Please see Figure 1-6This utility model is an easily detachable ultra-thin photoelectric encoder, including a housing 1. An encoder body 2 is fixedly connected to the bottom of the inner cavity of the housing 1. An end cover assembly 3 is provided on the top of the housing 1. An elastic elimination mechanism 4 is provided in the inner cavity of the end cover assembly 3. The end cover assembly 3 includes a mounting cover 31, which is located on the top of the housing 1. Connecting blocks 32 are fixedly connected to both sides of the inner cavity of the mounting cover 31. A first spring 33 is fixedly connected to one side of the connecting block 32. A limiting post 34 is sleeved on the surface of the first spring 33. A positioning frame 35 is fixedly connected to both sides of the housing 1. The bottom of the mounting cover 31 extends into the inner cavity of the positioning frame 35. A limiting hole 36 is provided on one side of the positioning frame 35 to cooperate with the limiting post 34.

[0028] Specifically: the end cap assembly 3 seals and protects the encoder body 2, preventing dust, impurities, etc., from entering the housing 1 and affecting the normal operation of the encoder body 2. The mounting cover 31 covers the top of the housing 1, forming a closed space. The first spring 33 has elastic deformation capability, and the limiting post 34 moves in extension and retraction under the action of the first spring 33. Positioning frames 35 are fixedly connected to both sides of the housing 1. The positioning frames 35 provide support for the positioning and fixation of the mounting cover 31. The bottom of the mounting cover 31 extends into the inner cavity of the positioning frame 35. This nested structure can play a preliminary positioning role for the mounting cover 31 and limit the mounting cover 31 in the horizontal direction. When the mounting cover 31 is placed on top of the housing 1, the limiting post 34 will automatically extend into the limiting hole 36 under the elastic force of the first spring 33, thereby firmly connecting the mounting cover 31 to the housing 1. This achieves quick installation of the end cover assembly 3 and the housing 1. When it is necessary to remove the mounting cover 31, simply press the limiting post 34 inward to compress the first spring 33 and exit the limiting hole 36, and the mounting cover 31 can be easily removed from the top of the housing 1. The whole process does not require tools, and the operation is simple and quick, which greatly improves the efficiency of encoder disassembly and installation, and facilitates the maintenance and repair of the internal encoder body 2. Example

[0029] Please see Figure 1-6Based on Embodiment 1, the elastic elimination mechanism 4 includes two positioning holes 41. The positioning holes 41 are located on both sides of the top of the encoder body 2. A second spring 42 is fixedly connected to the inner cavity of the positioning hole 41. An annular plate 43 is fixedly connected to the top of the second spring 42. An elastic pad 44 is fixedly connected to the bottom of the annular plate 43. A bearing 5 is provided on the top of the encoder body 2. A spindle 6 is provided through the inner cavity of the bearing 5. Limiting blocks 7 are fixedly connected to both sides of the outer shell 1. Limiting grooves 8 are provided on the top of the limiting blocks 7. The bottom of the mounting cover 31 extends into the inner cavity of the limiting grooves 8. A connecting seat 9 is fixedly connected to the bottom of one side of the outer shell 1. A connector 10 is fixedly connected to one side of the connecting seat 9. Positioning posts 11 are fixedly connected to both sides of the bottom of the annular plate 43. The positioning posts 11 are located in the inner cavity of the second spring 42. Connecting holes 12 are provided on both sides of the mounting cover 31. One side of the limiting post 34 extends into the inner cavity of the limiting hole 36 through the connecting hole 12.

[0030] Specifically: The positioning holes 41 provide a stable mounting base for the second spring 42. The symmetrical distribution of the two positioning holes 41 ensures balanced force. The elastic force of the second spring 42 acts on the annular plate 43, causing the elastic pad 44 at the bottom of the annular plate 43 to tightly fit the bearing 5, effectively eliminating the backlash of the bearing 5, ensuring the smooth rotation of the spindle 6, and improving the measurement accuracy of the encoder. At the same time, the elastic structure can adapt to the slight deformation of the bearing 5 under different working conditions, maintaining the backlash elimination effect for a long time and avoiding wear or accuracy decay caused by rigid contact. The bearing 5 provides support for the spindle 6, reducing the frictional resistance when the spindle 6 rotates, ensuring the smooth rotation of the spindle 6, and helping to improve the stability and accuracy of the encoded signal. The limiting block 7 and the structure extending from the bottom of the mounting cover 31 to the limiting groove 8 form an auxiliary positioning, which, together with the positioning frame 35, further restricts the horizontal displacement of the mounting cover 31, enhancing the end... The overall stability of the connection between the cover assembly 3 and the outer shell 1 is ensured. The connecting seat 9 provides a stable mounting carrier for the connector 10. The connector 10 serves as a signal transmission interface, facilitating electrical connection between the encoder and external devices and ensuring the stability of signal transmission. The positioning post 11 is located in the inner cavity of the second spring 42, guiding the extension and retraction direction of the second spring 42 and preventing the second spring 42 from shifting laterally or twisting under force. This ensures that the spring force can act stably along the axial direction on the annular plate 43, ensuring that the elastic elimination mechanism 4 has a uniform and stable effect on eliminating the clearance of the bearing 5, and avoiding uneven local force caused by abnormal spring deformation. The connecting hole 12 provides a moving channel for the limiting post 34, allowing the limiting post 34 to smoothly pass through the connecting hole 12 and extend into the limiting hole 36 of the positioning frame 35, ensuring the precise fit between the limiting post 34 and the limiting hole 36, and ensuring a reliable connection between the end cover assembly 3 and the outer shell 1.

[0031] The working principle of this utility model is as follows: When the mounting cover 31 is placed on the top of the outer shell 1, the bottom of the mounting cover 31 extends into the inner cavity of the positioning frame 35 and the limiting groove 8 of the limiting block 7, forming a double preliminary positioning and restricting the horizontal movement of the mounting cover 31. At this time, the first spring 33 is in a natural state, and the limiting post 34 sleeved on the surface of the first spring 33 automatically extends into the limiting hole 36 of the positioning frame 35 through the connecting holes 12 on both sides of the mounting cover 31 under the action of the spring force, completing the rapid fixation of the end cover assembly 3 and the outer shell 1, forming a closed space and protecting the internal components from external interference.

[0032] The elastic force of the second spring 42 acts on the annular plate 43. The elastic pad 44 at the bottom of the annular plate 43 fits tightly against the bearing 5 under the push of the spring force, effectively eliminating the clearance of the bearing 5. The positioning pins 11 on both sides of the bottom of the annular plate 43 are located in the inner cavity of the second spring 42, which guides the extension and contraction of the spring, avoids its lateral displacement, ensures that the elastic force acts stably on the bearing 5 along the axial direction, ensures that the spindle 6 rotates smoothly, and improves the measurement accuracy.

[0033] When maintenance or repair is required, press the limiting post 34 inward to compress the first spring 33 and disengage it from the limiting hole 36. The mounting cover 31 can then be easily removed without the need for tools. After maintenance is completed, the mounting cover 31 is repositioned, and the limiting post 34 is re-engaged into the limiting hole 36 under the elastic force of the first spring 33, thus completing the reset and fixation.

[0034] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. An easily detachable ultra-thin photoelectric encoder, comprising a housing (1), characterized in that: The bottom of the inner cavity of the housing (1) is fixedly connected to the encoder body (2), and the top of the housing (1) is provided with an end cap assembly (3). The inner cavity of the end cap assembly (3) is provided with an elastic elimination mechanism (4). The end cap assembly (3) includes a mounting cover (31), which is located on the top of the outer shell (1). Connecting blocks (32) are fixedly connected to both sides of the inner cavity of the mounting cover (31). A first spring (33) is fixedly connected to one side of the connecting block (32). A limiting post (34) is sleeved on the surface of the first spring (33). A positioning frame (35) is fixedly connected to both sides of the outer shell (1). The bottom of the mounting cover (31) extends into the inner cavity of the positioning frame (35). A limiting hole (36) is opened on one side of the positioning frame (35) to cooperate with the limiting post (34).

2. The easily detachable ultra-thin photoelectric encoder according to claim 1, characterized in that: The elastic elimination mechanism (4) includes positioning holes (41), and there are two positioning holes (41). The positioning holes (41) are opened on both sides of the top of the encoder body (2). A second spring (42) is fixedly connected to the inner cavity of the positioning hole (41). An annular plate (43) is fixedly connected to the top of the second spring (42), and an elastic pad (44) is fixedly connected to the bottom of the annular plate (43).

3. The easily detachable ultra-thin photoelectric encoder according to claim 1, characterized in that: The encoder body (2) is provided with a bearing (5) at the top, and a spindle (6) is provided through the inner cavity of the bearing (5).

4. The easily detachable ultra-thin photoelectric encoder according to claim 1, characterized in that: Both sides of the outer shell (1) are fixedly connected to limit blocks (7), and the top of the limit block (7) is provided with a limit groove (8), and the bottom of the mounting cover (31) extends into the inner cavity of the limit groove (8).

5. The easily detachable ultra-thin photoelectric encoder according to claim 1, characterized in that: A connecting seat (9) is fixedly connected to the bottom of one side of the outer shell (1), and a connector (10) is fixedly connected to one side of the connecting seat (9).

6. The easily detachable ultra-thin photoelectric encoder according to claim 2, characterized in that: Positioning posts (11) are fixedly connected to both sides of the bottom of the annular plate (43), and the positioning posts (11) are located in the inner cavity of the second spring (42).

7. The easily detachable ultra-thin photoelectric encoder according to claim 1, characterized in that: Both sides of the mounting cover (31) are provided with connection holes (12), and one side of the limiting post (34) extends into the inner cavity of the limiting hole (36) through the connection hole (12).

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