Coding wheel

Abstract

The utility model discloses a coding wheel which comprises a code disc, a fastener and a code disc support, and the code disc is coaxially and fixedly connected with the code disc support. The code disc support comprises a disc seat and a connecting part, the disc seat and the connecting part are integrally formed, and the connecting part is provided with a circular through hole used for installing a motor shaft. The connecting part is vertically divided into at least two parts, the peripheral wall of the connecting part is provided with a thread, the thread is a taper thread, and the intermediate diameter of the thread is gradually increased from the mounting direction of the motor shaft to the direction of the disc seat; the fixing part is used for being connected with the fastener so as to fix the code disc support on the motor shaft; according to the utility model, the higher coaxiality between the encoding wheel and the motor shaft is ensured, and the problems that the signal quality of the encoder is reduced and the accuracy is reduced due to poor coaxiality are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of encoders, and more specifically, relates to a coding wheel. Background Art

[0002] The coding wheel is usually installed on the motor shaft and rotates synchronously with the motor shaft. The coaxiality of the installation of the coding wheel and the motor shaft will affect the quality of the encoder signal and the accuracy of the encoder signal output. The existing installation methods include fixing and connecting the motor shaft and the coding wheel by using set screws to radially hold the motor shaft on the coding wheel. In this method, there is usually a fitting clearance between the motor shaft and the coding wheel. When the set screw radially holds the motor shaft, it usually causes the coaxiality of the coding wheel and the motor shaft to shift, resulting in poor coaxiality. There is also an interference fit method to connect the motor shaft and the coding wheel. This method has better coaxiality, but usually requires professional pressing tools to press the motor shaft and the coding wheel together. It is not suitable for on-site installation by users and is not easy to disassemble. If the interference amount is small, when the motor is subjected to shock and vibration, it is easy to cause displacement between the coding wheel and the motor shaft, resulting in the coding wheel falling off or failing. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a coding wheel.

[0004] To solve the above technical problem, the basic concept of the technical solution adopted by the utility model is: a coding wheel, at least including a disc holder and a fastener. The disc holder includes a disc base; a connecting portion provided with a first through hole for installing the motor shaft; a notch formed on the connecting portion, and the notch leads to the connecting portion; a thread is provided on the outer peripheral wall of the connecting portion for connecting with the fastener, thereby fixing the disc holder on the motor shaft.

[0005] Further, the thread includes a taper thread, and the pitch diameter of the thread gradually increases from the installation direction of the motor shaft to the direction of the disc base.

[0006] Further, the disc base includes a first frustum and a second frustum in a stepped shape. The diameter of the first frustum is smaller than the diameter of the second frustum; the diameter of the first frustum is greater than or equal to the outer diameter of the fastener.

[0007] Further, the fastener is provided with an internal thread, and a bayonet is circumferentially spaced on the outer peripheral wall of the fastener.

[0008] Further, the coding wheel further includes a code disc, the code disc is fixedly connected to the second frustum, and a second through hole is provided in the middle of the code disc. The second through hole is used to coaxially sleeve the code disc on the outer periphery of the first frustum.

[0009] Further, the outer diameter of the second frustum is greater than the diameter of the second through hole.

[0010] Further, the code disk is bonded and / or welded to the second frustum.

[0011] Further, the root clearing treatment is performed on the part where the second frustum is connected to the code disk.

[0012] Further, the disk base and the connecting part are integrally formed.

[0013] Further, the first through hole is circular or the second through hole is circular.

[0014] After adopting the above technical solutions, the utility model has the following beneficial effects compared with the prior art.

[0015] The connecting part of the code disk support of the utility model enables the motor shaft to pass through and be positioned more precisely. At the same time, combined with the action of the fastener, it can ensure a higher coaxiality between the coding wheel and the motor shaft, which helps to reduce the problems of encoder signal quality degradation and accuracy reduction caused by poor coaxiality. And, compared with the interference fit method, the installation method of the utility model does not require professional pressing tools, and users can easily complete the installation and disassembly on site. This design makes the installation process more simple, reducing the installation difficulty and cost.

[0016] The stable fixing force provided by the fastener can prevent the coding wheel from falling off or failing when subjected to impact or vibration. In addition, since at least two notches are provided in the connecting part of the code disk support of the utility model, the code disk support of the utility model is applicable to various motor shaft sizes, so it has high versatility; the appropriate code disk support and fastener can be selected according to actual needs to adapt to different specifications of motor shafts.

[0017] Finally, since the installation method of the utility model is simple and easy to implement and does not require professional tools, the installation cost can be reduced; at the same time, since the connection between the coding wheel and the motor shaft is more stable and reliable, the equipment failure rate and maintenance cost caused by poor coaxiality can also be reduced.

[0018] The following further describes in detail the specific implementation manners of the utility model with reference to the drawings. Description of the Drawings

[0019] The drawings, as a part of the utility model, are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation to the utility model. Obviously, the drawings in the following description are only some embodiments. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts. In the drawings:

[0020] Figure 1 It is a schematic structural diagram of a code disc support of a code wheel of the present utility model;

[0021] Figure 2 It is a side view of a code disc support of a code wheel of the present utility model;

[0022] Figure 3 It is a top view of a code disc support of a code wheel of the present utility model;

[0023] Figure 4 It is a schematic structural diagram of a fastener of a code wheel of the present utility model;

[0024] Figure 5 It is a sectional view of a fastener of a code wheel of the present utility model;

[0025] Figure 6 It is a schematic structural diagram of a fastener of a code wheel of the present utility model from another angle;

[0026] Figure 7 It is a schematic structural diagram of a code wheel of the present utility model;

[0027] Figure 8 It is a sectional view of a code wheel of the present utility model;

[0028] Figure 9 It is a schematic structural diagram of a code wheel of the present utility model from another angle;

[0029] Figure 10 It is an exploded view of a code wheel of the present utility model;

[0030] Description of the drawings: 1. Code disc support; 11. Disc base; 111. First frustum; 112. Second frustum;

[0031] 12. Connection part; 121. First through hole; 122. Notch; 123. Thread; 2. Fastener; 21. Internal thread; 22. Bayonet; 3. Code disc; 31. Second through hole;

[0032] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but not to limit the scope of the present utility model.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] Embodiment 1

[0037] As Figures 1-10 shown, a coding wheel at least includes a code disk holder 1 and a fastener 2. The code disk holder 1 includes a disk base 11; a connecting portion 12, and a first through hole 121 for installing a motor shaft is provided on the connecting portion 12; a notch 122 is formed on the connecting portion 12. Preferably, three notches 122 are arranged at intervals and conduct to the connecting portion 12; a thread 123 is provided on the outer peripheral wall of the connecting portion 12 for connecting with the fastener 2, so as to fix the code disk holder 1 on the motor shaft.

[0038] In this embodiment, the connecting portion 12 of the code disk holder 1 is provided with a first through hole 121 for installing the motor shaft, and the outer peripheral wall of the connecting portion 12 includes the thread 123. By connecting with the fastener 2, it is ensured that the code disk holder 1 is fixed on the motor shaft. This fixing method is simple and easy to implement and has high reliability, ensuring the stability of the motor shaft during rotation. In addition, the notch 122 is formed on the connecting portion 12, which reduces the overall weight of the coding wheel while enhancing the flexibility of its structure. In this application, by connecting the fastener 2 with the thread 123 of the connecting portion 12, the assembly and disassembly of the coding wheel are simple and fast, improving production efficiency and facilitating later maintenance and replacement work.

[0039] In this embodiment, a tapered thread is provided on the outer peripheral wall of the connecting portion 12, and the pitch diameter of the thread 123 gradually increases from the installation direction of the motor shaft to the direction of the disk seat 11, so that the fastener 2 can apply pressure to the motor shaft more evenly during the tightening process, forming a more stable connection. Compared with straight threads, tapered threads can generate greater friction when tightened, so they can provide stronger anti-loosening performance. In addition, since the pitch diameter of the thread gradually increases, when the fastener 2 is tightened, the stress distribution on the thread will become more uniform. This helps to reduce the stress concentration phenomenon, thereby extending the service life of the thread and improving the reliability of the connection structure. In addition, the design of the tapered thread makes the fastener 2 smoother during the tightening process, reducing the resistance and difficulty during assembly; it can not only improve the assembly efficiency, but also reduce the risk of damage that may occur during the assembly process.

[0040] In this embodiment, the tapered thread provided on the outer peripheral wall of the connecting portion 12 is a variable-diameter thread, and the pitch diameter of the variable-diameter thread gradually increases from the installation direction of the motor shaft to the direction of the disk seat 11, so that the fastener 2 can apply pressure to the motor shaft more evenly during the tightening process, forming a more stable connection.

[0041] In this embodiment, the disk seat 11 includes a first frustum 111 and a second frustum 112 in a stepped shape.

[0042] The diameter of the first frustum 111 is smaller than the diameter of the second frustum 112. The stepped structure of the present application not only increases the stability of the code wheel, but also helps to optimize the installation position of the code disk 3. The diameter of the first frustum 111 is greater than or equal to the outer diameter of the fastener 2, which is beneficial to further fix the code disk 3 on the disk seat 11.

[0043] In this embodiment, the code wheel further includes a code disk 3, and the code disk 3 is fixedly connected to the second frustum 112. For example, the code disk 3 is bonded and / or welded to the second frustum 112. A second through hole 31 is provided in the middle of the code disk 3, and the second through hole 31 is used to coaxially sleeve the code disk 3 on the outer periphery of the first frustum 111. The installation method of the present application ensures the coaxiality between the code disk 3 and the disk seat 11, further improving the accuracy of the code wheel. In addition, the fixed connection method between the code disk 3 and the second frustum 112, such as bonding and / or welding, ensures the firm connection between the code disk 3 and the disk seat 11, which not only has high strength, but also can resist vibration and impact during rotation.

[0044] In this embodiment, after the code disc 3 is fixedly connected to the second truncated table 112 of the code disc support 1, the code disc 3 and the code disc support 1 are mounted together on the motor shaft to be installed, and after adjusting the required position, the fastener 2 is screwed into the connecting portion 12 of the code disc support 1 to fix the code disc support 1 to the motor shaft. Since the thread on the connecting portion 12 of the code disc support 1 is a tapered thread, the deeper the fastener 2 is screwed in, the tighter the connection between the code disc support 1 and the motor shaft is. In addition, the notch 122 of the connecting portion 12 is designed to make it easier for the threaded portion to contact the motor shaft, and during the screwing-in process of the fastener 2, the threaded portion basically approaches and simultaneously holds the motor shaft, so as to solve the problem of fastening the code disc support 1 to the motor shaft.

[0045] In this embodiment, the fastener 2 is provided with an internal thread 21, and the outer wall of the fastener 2 is provided with bayonet 22 at intervals in the circumferential direction. The fastener 2 of the present application is provided with the internal thread 21 so that the fastener 2 can be screwed into the connecting portion 12 to play a fastening role. The internal thread 21 is a tapered thread. The structure of the internal thread 21 is the same as the thread 123 on the outer wall of the connecting portion 12. The middle diameter of the internal thread 21 gradually increases from the installation direction of the motor shaft to the direction of the disc seat 11. This setting method of the present application generates an inward extrusion force as the fastener 2 is screwed in, making the connection more firm and reliable. In addition, the bayonet 22 arranged at intervals in the circumferential direction of the outer wall of the fastener 2 can be quickly installed and disassembled, so that the fastener 2 can adapt to different usage scenarios and needs, and improve the convenience of installation.

[0046] In this embodiment, the outer diameter of the second truncated cone 112 is larger than the diameter of the second through hole 31 of the code wheel. The design of the second truncated cone 112 of the present application not only provides support for the code wheel 3, but also enhances the structural strength of the entire code wheel through its larger diameter, thereby making the code wheel more stable when subjected to external force or vibration, and extending its service life.

[0047] In this embodiment, the outer peripheral edge of the code disc 3 is chamfered; and / or the portion where the second truncated table 112 is connected to the code disc 3 is cleaned. In this application, the excess material, burrs, sharp edges, etc. generated by processing or welding between the code disc 3 and the second truncated table 112 are removed. This process is of great significance for improving the overall quality of the encoder wheel and ensuring the accuracy and stability of the encoder wheel. In the manufacture of the code disc holder, the cleaned-up process can ensure that the code disc holder and other components (such as the code disc, motor shaft, etc.) fit more closely and stably, thereby improving the performance and reliability of the entire encoder wheel system.

[0048] In this embodiment, the disk base 11 and the connecting portion 12 are integrally formed.

[0049] In this embodiment, the first through hole 121 is circular or the second through hole 31 is circular.

[0050] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, may make some changes or modifications to the above-mentioned technical content using the disclosed technical content to form equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the present invention.

Claims

1. A coding wheel, at least comprising a code disk holder (1) and a fastener (2), characterized in that, The code disk holder (1) includes: a disk base (11); A connecting portion (12), and a first through hole (121) for installing a motor shaft is provided on the connecting portion (12); A notch (122) is formed on the connecting portion (12), and the notch (122) communicates with the connecting portion (12); A thread (123) is provided on the outer peripheral wall of the connecting portion (12) for connecting with the fastener (2), thereby fixing the code disk holder (1) on the motor shaft.

2. The coding wheel according to claim 1, characterized in that, The thread (123) includes a taper thread, and the pitch diameter of the thread (123) gradually increases from the installation direction of the motor shaft to the direction of the disk base (11).

3. The coding wheel according to claim 2, characterized in that, The disk base (11) includes a first frustum (111) and a second frustum (112) in a stepped shape, The diameter of the first frustum (111) is smaller than the diameter of the second frustum (112); The diameter of the first frustum (111) is greater than or equal to the outer diameter of the fastener (2).

4. The coding wheel according to claim 3, characterized in that, The fastener (2) is provided with an internal thread (21), and clamping openings (22) are circumferentially spaced on the outer peripheral wall of the fastener (2).

5. The coding wheel according to claim 4, characterized in that, The coding wheel further includes a code disk (3), the code disk (3) is fixedly connected to the second frustum (112), A second through hole (31) is provided in the middle of the code disk (3), and the second through hole (31) is used to coaxially sleeve the code disk (3) on the outer periphery of the first frustum (111).

6. The coding wheel according to claim 5, characterized in that, The outer diameter of the second frustum (112) is greater than the diameter of the second through hole (31).

7. The coding wheel according to claim 5, characterized in that, The code disk (3) is bonded and / or welded to the second frustum (112).

8. The coding wheel according to claim 7, characterized in that, Root clearing treatment is performed on the portion where the second frustum (112) is connected to the code disk (3).

9. The coding wheel according to claim 1, characterized in that, The disk base (11) and the connecting portion (12) are integrally formed.

10. The coding wheel according to claim 5, characterized in that, The first through hole (121) is circular; Or the second through hole (31) is circular.

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