CN219351459U

CN219351459U - Encoder and motor assembly

Info

Publication number: CN219351459U
Application number: CN202223258397.3U
Authority: CN
Inventors: 胡森; 彭玉礼; 周溪; 林炜彬; 张育州; 黄嘉辉
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-07-14
Anticipated expiration: 2032-12-02

Abstract

The utility model provides an encoder and a motor assembly, which comprises a supporting seat, a rotating shaft and a code disc support, wherein the supporting seat is provided with a containing groove and an assembly through hole communicated with the containing groove, a main control board is covered at a notch of the containing groove, and a photosensitive element is arranged on the surface of the main control board facing one side of the assembly through hole; at least one part of the rotating shaft passes through the assembly through hole and stretches into the accommodating groove; the code disc tray is positioned in the accommodating groove and connected with the end part of the rotating shaft, and the position of the code disc tray in the axial direction of the rotating shaft is adjustably arranged so as to adjust the distance between the code disc positioned on the code disc tray and the photosensitive element. The utility model solves the problems of high processing cost and complex process of the encoder in the prior art.

Description

Encoder and motor assembly

Technical Field

The utility model relates to the technical field of servo systems, in particular to an encoder and a motor assembly.

Background

In high precision servo systems, long-term stable operation of the encoder plays a critical role in the performance of the servo system. The encoder is a high-precision sensor for measuring angular displacement and angular velocity, has the advantages of high resolution, good working reliability and the like, and is widely applied to field environments and various devices.

In the prior art, in order to ensure the signal quality of the high-score encoder, a gap between the code wheel and the photosensitive element is generally required to be set to be about 0.1mm, however, the existing high-score encoder is mainly realized by improving the dimensional tolerance of parts or a post-processing mode, so that the processing cost of the encoder is high, and the process is complicated.

Disclosure of Invention

The utility model mainly aims to provide an encoder and a motor assembly, which are used for solving the problems of high processing cost and complex process of the encoder in the prior art.

In order to achieve the above object, according to one aspect of the present utility model, there is provided an encoder comprising a supporting base, a rotating shaft, and a code wheel tray, wherein the supporting base has a receiving groove and an assembly through hole communicating with the receiving groove, a main control board is capped at a notch of the receiving groove, and a photosensitive element is disposed on a surface of the main control board facing to a side of the assembly through hole; at least one part of the rotating shaft passes through the assembly through hole and stretches into the accommodating groove; the code disc tray is positioned in the accommodating groove and connected with the end part of the rotating shaft, and the position of the code disc tray in the axial direction of the rotating shaft is adjustably arranged so as to adjust the distance between the code disc positioned on the code disc tray and the photosensitive element.

Further, the code disc support is in threaded connection with the end part of the rotating shaft.

Further, one end of the code disc support, which faces the assembly through hole, is in concave-convex fit with the shaft end of the rotating shaft.

Further, one end of the code disc support, which faces the assembly through hole, is provided with an adjusting hole, a cavity is formed between the end face of the rotating shaft in the accommodating groove and the hole bottom face of the adjusting hole, an injection opening is formed in the hole wall face of the adjusting hole, and the injection opening is communicated with the cavity, so that glue injection operation is performed in the cavity through the injection opening.

Further, the end part of the rotating shaft positioned in the accommodating groove is provided with at least one communication notch, and the communication notch is used for communicating the cavity and the connecting part between the cavity and the rotating shaft.

Further, the cross section of the communication notch in the extending direction is V-shaped.

Further, an operation port is formed in the wall surface of the accommodating groove and used for communicating the outside with the accommodating groove.

Further, one end of the code disc support, which faces the main control board, is provided with a boss structure, the code disc is sleeved on the outer periphery side of the boss structure, and the surface of the code disc, which faces one side of the main control board, is flush with the surface of the boss structure, which faces one side of the main control board.

Further, at least one bearing is provided between the outer peripheral side of the rotating shaft at the fitting through hole and the hole wall surface of the fitting through hole.

Further, in the direction from the accommodating groove to the assembly through hole, the rotating shaft sequentially comprises a first shaft section, a second shaft section and a third shaft section which are connected, wherein the first shaft section is positioned in the accommodating groove, the second shaft section is positioned in the assembly through hole, and the third shaft section is positioned outside the assembly through hole.

Further, the shaft diameter R1 of the first shaft section, the shaft diameter R2 of the second shaft section, and the shaft diameter R3 of the third shaft section satisfy: r1 is less than R2 and less than R3.

According to another aspect of the utility model, there is provided a motor assembly comprising an encoder and a motor shaft, the encoder being connected to the motor shaft, the encoder being the encoder described above.

By adopting the technical scheme, the code disc support of the encoder is arranged in the axial direction of the rotating shaft in a structure form with adjustable positions, so that the distance between the code disc and the photosensitive element can be adjusted by adjusting the code disc positioned on the code disc support on the rotating shaft, the adjusting mode is convenient and quick, the structure form of the encoder provided by the application is simple and convenient to process, the processing and manufacturing cost of the encoder is greatly reduced, and the economy of the encoder is facilitated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic cross-sectional structure of an encoder according to an alternative embodiment of the present utility model;

FIG. 2 shows a schematic structural view of a shaft of the encoder of FIG. 1;

fig. 3 shows a schematic structural diagram of the spindle of fig. 2 from a top view.

Wherein the above figures include the following reference numerals:

10. a support base; 11. a receiving groove; 111. an operation port;

20. a main control board; 21. a photosensitive element;

30. a rotating shaft; 31. a first shaft section; 32. a second shaft section; 33. a third shaft section; 311. a communicating notch;

40. a code disc support; 41. an injection port; 42. a boss structure;

50. a code wheel; 60. a bearing; 100. a cavity.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order to solve the problems of high processing cost and complicated process of the encoder in the prior art, the utility model provides the encoder and the motor assembly, wherein the motor assembly comprises the encoder and a motor shaft, the encoder is connected with the motor shaft, and the encoder is the encoder.

As shown in fig. 1 to 3, the encoder comprises a supporting seat 10, a rotating shaft 30 and a code disc tray 40, wherein the supporting seat 10 is provided with a containing groove 11 and an assembling through hole communicated with the containing groove 11, a main control board 20 is covered at a notch of the containing groove 11, and a photosensitive element 21 is arranged on the surface of the main control board 20 facing to one side of the assembling through hole; at least a portion of the rotation shaft 30 passes through the fitting through hole and protrudes into the accommodation groove 11; the code wheel 40 is positioned in the receiving groove 11 and connected with the end of the rotating shaft 30, and the code wheel 40 is adjustably positioned in the axial direction of the rotating shaft 30 to adjust the distance between the code wheel 50 positioned on the code wheel 40 and the photosensitive element 21.

Through setting up the code wheel support 40 of encoder into the adjustable structural style in position in the axial of pivot 30, like this, through adjusting the code wheel 50 that is located on code wheel support 40 in pivot 30, can realize the regulation to the distance between code wheel 50 and the photosensitive element 21, the regulation mode is comparatively convenient and fast, and the structural style of encoder that this application provided is comparatively simple be convenient for process, greatly reduced the manufacturing cost of encoder, be favorable to the economic nature of encoder.

In the present application, the code wheel 40 is screwed to the end of the rotary shaft 30. In this way, ease of adjustment of the code wheel 40 relative to the rotary shaft 30 is ensured.

In this application, in order to ensure the reliability of the fit between the code disc 40 and the rotating shaft 30, the end of the code disc 40 facing the assembly through hole is optionally engaged with the shaft end of the rotating shaft 30. In this way, the reliability of the connection between the code wheel 40 and the rotary shaft 30 is ensured, and the reliability of the positional adjustment of the code wheel 40 with respect to the rotary shaft 30 is also ensured.

As shown in fig. 1, one end of the code disc support 40 facing the assembly through hole is provided with an adjusting hole, a cavity 100 is formed between the end surface of the rotating shaft 30 in the accommodating groove 11 and the hole bottom surface of the adjusting hole, an injection opening 41 is formed on the hole wall surface of the adjusting hole, and the injection opening 41 is communicated with the cavity 100 so as to perform glue injection operation into the cavity 100 through the injection opening 41. In this way, the injection hole 41 is used for injecting glue into the cavity 100, so that the glue can be ensured to fill the whole cavity 100 as much as possible, the connection reliability between the code disc support 40 and the rotating shaft 30 is ensured after the glue is solidified, and the shaking phenomenon between the code disc support 40 and the rotating shaft 30 is avoided in the process that the subsequent motor shaft drives the rotating shaft 30 to rotate.

Further, the inner wall surface of the adjustment hole has an internal thread structure, and the outer peripheral side of the end portion of the rotation shaft 30 located in the accommodation groove 11 has an external thread structure for mating with the internal thread structure.

In the present application, it is necessary to ensure that the coaxiality of the code wheel 50 and the rotary shaft 30 is less than 5um before the injection operation is performed into the cavity 100 through the injection port 41.

As shown in fig. 2 and 3, the end of the rotating shaft 30 in the accommodating groove 11 has at least one communication notch 311, and the communication notch 311 is used for communicating the cavity 100 with the connection therebetween. In this way, the glue solution injected into the cavity 100 can smoothly flow into the joint between the code disc support 40 and the rotating shaft 30, so that the joint between the code disc support 40 and the rotating shaft 30 is glued, and the connection stability between the code disc support 40 and the rotating shaft 30 is ensured.

In this application, the communication notch 311 is used to communicate the threaded connection between the cavity 100 and the two.

As shown in fig. 3, the cross section of the communication notch 311 in the extending direction thereof is V-shaped. In this way, the communication notch 311 having a V-shape ensures the reliability of the communication at the junction between the hollow space 100 and the two.

In the present application, in order to ensure that the operator can smoothly inject the glue solution into the cavity 100 through the injection port 41, as shown in fig. 1, an operation port 111 is opened in the wall surface of the accommodating groove 11, and the operation port 111 is used to communicate the outside with the accommodating groove 11. Thus, the operation port 111 provides an operation space for an operator, and ensures the convenience of operation for the operator.

As shown in fig. 1, one end of the code disc tray 40 facing the main control board 20 is provided with a boss structure 42, the code disc 50 is sleeved on the outer peripheral side of the boss structure 42, and the surface of the code disc 50 facing the main control board 20 is flush with the surface of the boss structure 42 facing the main control board 20. Like this, boss structure 42 plays the limiting displacement to code wheel 50, in addition, through setting up the surface of code wheel 50 towards main control board 20 one side and the surface of boss structure 42 towards main control board 20 one side into the flush structural style, prevent that the motor shaft from driving the in-process that code wheel support 40 and the code wheel 50 on it rotated through pivot 30, code wheel support 40 and code wheel 50 all can smoothly rotate, can not produce the interference with main control board 20.

In this application, the code wheel 50 is adhesively connected to the code wheel holder 40.

As shown in fig. 1, at least one bearing 60 is provided between the outer peripheral side of the rotary shaft 30 at the fitting through hole and the wall surface of the fitting through hole. In this way, the rotational reliability of the rotation shaft 30 with respect to the support base 10 is ensured.

In this application, as shown in fig. 1, there are two bearings 60, and the two bearings 60 are disposed at intervals along the axial direction of the rotating shaft 30, and the wall surfaces of the bearings 60 and the mounting through holes may be in clearance fit, or may be in interference fit.

As shown in fig. 1 and 2, in the direction from the accommodating groove 11 to the fitting through hole, the rotation shaft 30 sequentially includes a first shaft section 31, a second shaft section 32, and a third shaft section 33 connected, wherein the first shaft section 31 is located in the accommodating groove 11, the second shaft section 32 is located in the fitting through hole, and the third shaft section 33 is located outside the fitting through hole. In this way, by providing the rotation shaft 30 in a structure including the first shaft section 31, the second shaft section 32, and the third shaft section 33, the connection reliability between the rotation shaft 30 and the support base 10 is ensured, and the rotation reliability of the rotation shaft 30 can also be ensured.

As shown in fig. 1 and 2, the shaft diameter R1 of the first shaft section 31, the shaft diameter R2 of the second shaft section 32, and the shaft diameter R3 of the third shaft section 33 satisfy: r1 is less than R2 and less than R3.

It should be noted that, in the present application, the main control board 20 is fixed at the notch of the accommodating groove 11 of the supporting seat 10, the main control board 20 is provided with a photosensitive element 21, a communication module, a power module, a signal processing module, a connector module and the like, the main control board 20 supplies power to other modules such as the photosensitive element 21 through the power module thereon, the photosensitive element 21 transmits analog or digital signals to the signal processing module through sensing the change of light, the signal processing module analyzes and filters the signals, and finally the signals are transmitted to an external device through the communication module and the connector module.

In this application, the encoder mounting process is specifically as follows:

the two bearings 60 are firstly arranged on the hole wall surface of the assembly through hole in a clearance fit or interference fit (in an adhesive manner), then the code disc 50 and the code disc support 40 are in adhesive connection, the assembled code disc 50 and the code disc support 40 are arranged on the rotating shaft 30 in a screwing manner, then the main control board 20 is covered on the notch of the containing groove 11, the main control board 20 is fixedly connected with the supporting seat 10, finally the distance between the code disc 50 and the photosensitive element 21 is regulated, the distance between the two can be observed through equipment capable of displaying the distance in real time, after the distance between the two is regulated to a preset distance, glue solution is finally injected into the cavity 100 through the injection port 41, and simultaneously the glue solution flows into the threaded connection position between the code disc support 40 and the rotating shaft 30 under the drainage effect of the communication notch 311, and after the glue solution is solidified, the code disc support 40 and the rotating shaft 30 are completely fixedly connected in the radial direction and the axial direction.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An encoder, comprising:

the support seat (10), the support seat (10) is provided with a containing groove (11) and an assembly through hole communicated with the containing groove (11), a main control board (20) is covered at a notch of the containing groove (11), and a photosensitive element (21) is arranged on the surface of the main control board (20) facing one side of the assembly through hole;

a rotating shaft (30), at least a part of the rotating shaft (30) penetrates through the assembly through hole and stretches into the accommodating groove (11);

the code disc support (40) is positioned in the accommodating groove (11) and is connected with the end part of the rotating shaft (30), and the code disc support (40) is adjustably arranged at the axial position of the rotating shaft (30) so as to adjust the distance between the code disc (50) positioned on the code disc support (40) and the photosensitive element (21).

2. Encoder according to claim 1, characterized in that the code wheel carrier (40) is screwed with the end of the spindle (30).

3. Encoder according to claim 1, characterized in that the end of the code disc holder (40) facing the assembly through hole is in a male-female fit with the shaft end of the rotary shaft (30).

4. The encoder according to claim 1, wherein an end of the code disc support (40) facing the assembly through hole is provided with an adjusting hole, a cavity (100) is formed between the end face of the rotating shaft (30) in the accommodating groove (11) and the hole bottom face of the adjusting hole, an injection opening (41) is formed in the hole wall face of the adjusting hole, and the injection opening (41) is communicated with the cavity (100) so as to perform glue injection operation into the cavity (100) through the injection opening (41).

5. Encoder according to claim 4, characterized in that the end of the shaft (30) located in the receiving groove (11) has at least one communication notch (311), the communication notch (311) being adapted to communicate the cavity (100) with the connection between the two.

6. The encoder according to claim 5, wherein the cross section of the communication gap (311) in the extending direction thereof is V-shaped.

7. The encoder according to any one of claims 1 to 6, wherein an operation port (111) is formed on a wall surface of the accommodating groove (11), and the operation port (111) is used for communicating an outside with the accommodating groove (11).

8. The encoder according to any one of claims 1 to 6, wherein one end of the code disc tray (40) facing the main control board (20) is provided with a boss structure (42), the code disc (50) is sleeved on the outer peripheral side of the boss structure (42), and the surface of the code disc (50) facing the main control board (20) is flush with the surface of the boss structure (42) facing the main control board (20).

9. Encoder according to any of claims 1 to 6, characterized in that at least one bearing (60) is provided between the outer peripheral side of the spindle (30) at the fitting through hole and the wall surface of the fitting through hole.

10. Encoder according to any of claims 1 to 6, characterized in that the spindle (30) comprises, in the direction of the receiving slot (11) to the fitting through hole, a first spindle section (31), a second spindle section (32), a third spindle section (33) connected in sequence, wherein the first spindle section (31) is located in the receiving slot (11), the second spindle section (32) is located in the fitting through hole, and the third spindle section (33) is located outside the fitting through hole.

11. Encoder according to claim 10, characterized in that the shaft diameter R1 of the first shaft section (31), the shaft diameter R2 of the second shaft section (32), the shaft diameter R3 of the third shaft section (33) satisfy: r1 is less than R2 and less than R3.

12. A motor assembly comprising an encoder and a motor shaft, the encoder being coupled to the motor shaft, the encoder being as claimed in any one of claims 1 to 11.