Encoder and motor assembly

Abstract

The application provides an encoder and a motor assembly, and the encoder comprises a support seat, a rotating shaft and a code disc holder, wherein the support seat is provided with a containing groove and an assembly through hole communicated with the containing groove, a main control board is arranged on the opening of the containing groove, and a photosensitive element is arranged on the surface of the main control board on the side facing the assembly through hole; at least a part of the rotating shaft passes through the assembly through hole and extends into the containing groove; the code disc holder is located in the containing groove and connected with the end of the rotating shaft, and the code disc holder is adjustably arranged in the axial direction of the rotating shaft to adjust the distance between the code disc arranged on the code disc holder and the photosensitive element. The application solves the problems of high processing cost and complex process of the encoder in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of servo system, in particular to an encoder and motor assembly. BACKGROUND

[0002] In a high-precision servo system, the long-term stable operation of the encoder plays a crucial role in the performance of the servo system. The encoder is a high-precision sensor for measuring angular displacement and angular velocity, which has many advantages such as high resolution and good working reliability, and is widely used in field environments and various devices.

[0003] In the prior art, in order to ensure the signal quality of the high-line encoder, the gap between the code disc and the photosensitive element is usually set to about 0.1mm, but the existing high-line encoder is mainly realized by improving the size tolerance of the parts or the way of post-processing, resulting in high processing cost of the encoder and complicated process. SUMMARY

[0004] The main purpose of the present application is to provide an encoder and motor assembly to solve the problem of high processing cost and complicated process of the encoder in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an encoder is provided, comprising a support seat, a rotating shaft and a code disc holder, wherein the support seat has a containing groove and an assembly through hole communicating with the containing groove, a main control board is arranged at the slot opening of the containing groove, and a photosensitive element is arranged on the surface of the main control board facing the assembly through hole; at least a part of the rotating shaft passes through the assembly through hole and extends into the containing groove; the code disc holder is located in the containing groove and connected with the end of the rotating shaft, and the position of the code disc holder on the rotating shaft is adjustably arranged to adjust the distance between the code disc on the code disc holder and the photosensitive element.

[0006] Further, the code disc holder is threadedly connected with the end of the rotating shaft.

[0007] Further, the end of the code disc holder facing the assembly through hole is in concave-convex cooperation with the shaft end of the rotating shaft.

[0008] Further, the end of the code disc holder facing the assembly through hole has an adjusting hole, an end face of the rotating shaft located in the containing groove and a hole bottom face of the adjusting hole form a cavity, an injection port is arranged on a hole wall face of the adjusting hole and communicates with the cavity, so that the injection port is used for injection work in the cavity.

[0009] Further, the end of the rotating shaft in the accommodating groove has at least one communication gap for communicating the cavity with the joint therebetween.

[0010] Further, the cross section of the communication gap in the extension direction thereof is V-shaped.

[0011] Further, an operation opening is formed on the groove wall surface of the accommodating groove for communicating the outside with the accommodating groove.

[0012] Further, the end of the rotating shaft in the accommodating groove has at least one communication gap for communicating the cavity with the joint therebetween.

[0013] Further, at least one bearing is arranged between the outer circumferential side of the rotating shaft at the assembly through hole and the hole wall surface of the assembly through hole.

[0014] Further, in the direction from the accommodating groove to the assembly through hole, the rotating shaft sequentially comprises a first shaft segment, a second shaft segment and a third shaft segment connected in sequence, wherein the first shaft segment is located in the accommodating groove, the second shaft segment is located in the assembly through hole, and the third shaft segment is located outside the assembly through hole.

[0015] Further, the shaft diameter R1 of the first shaft segment, the shaft diameter R2 of the second shaft segment and the shaft diameter R3 of the third shaft segment satisfy R1 < R2 < R3.

[0016] According to another aspect of the present application, there is provided an electric machine assembly comprising an encoder and an electric machine shaft, the encoder being connected with the electric machine shaft, and the encoder being the above-mentioned encoder.

[0017] By adopting the technical scheme of the present application, the code disc holder of the encoder is arranged in an adjustable position in the axial direction of the rotating shaft, so that the distance between the code disc and the photosensitive element can be adjusted by adjusting the code disc on the code disc holder, and the adjustment is convenient and fast. Moreover, the structure of the encoder is simple and easy to process, which greatly reduces the manufacturing cost of the encoder and is beneficial to the economy of the encoder. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the specification illustrate the present application further, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 Fig. 2 shows a sectional structure schematic view of an encoder according to an optional embodiment of the present application.

[0020] Figure 2 A structural schematic view of a rotating shaft of an encoder in Figure 1 is shown.

[0021] Figure 3 A structural schematic view of a rotating shaft in Figure 2 is shown.

[0022] Wherein, the above-mentioned drawings include the following reference signs:

[0023] 10, support seat; 11, containing groove; 111, operation port;

[0024] 20, main control board; 21, photosensitive element;

[0025] 30, rotating shaft; 31, first shaft section; 32, second shaft section; 33, third shaft section; 311, communication gap;

[0026] 40, code disc support; 41, injection port; 42, boss structure;

[0027] 50, code disc; 60, bearing; 100, cavity. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In order to solve the problems of high processing cost and complex process of the encoder in the prior art, the present application provides an encoder and a motor assembly, wherein the motor assembly comprises an encoder and a motor shaft, the encoder is connected with the motor shaft, and the encoder is the above-mentioned and the following-mentioned encoder.

[0030] As Figures 1 to 3As shown, the encoder comprises a support base 10, a rotating shaft 30 and a code disc holder 40, wherein the support base 10 has a receiving groove 11 and an assembly through hole in communication with the receiving groove 11, a main control board 20 is arranged at the opening of the receiving groove 11, and a photosensitive element 21 is arranged on the surface of the main control board 20 facing the assembly through hole; at least a part of the rotating shaft 30 passes through the assembly through hole and extends into the receiving groove 11; the code disc holder 40 is located in the receiving groove 11 and connected with the end of the rotating shaft 30, and the code disc holder 40 is arranged in an adjustable position in the axial direction of the rotating shaft 30 to adjust the distance between the code disc 50 located on the code disc holder 40 and the photosensitive element 21.

[0031] By arranging the code disc holder 40 of the encoder in an adjustable position in the axial direction of the rotating shaft 30, the distance between the code disc 50 and the photosensitive element 21 can be adjusted by adjusting the code disc 50 located on the code disc holder 40 on the rotating shaft 30, which is convenient and fast, and the structure of the encoder provided by the present application is simple and easy to process, which greatly reduces the processing cost of the encoder and is beneficial to the economy of the encoder.

[0032] It should be noted that in the present application, the code disc holder 40 is threadedly connected with the end of the rotating shaft 30. In this way, the adjustment convenience of the code disc holder 40 relative to the rotating shaft 30 is ensured.

[0033] It should be noted that in the present application, in order to ensure the cooperation reliability between the code disc holder 40 and the rotating shaft 30, the end of the code disc holder 40 facing the assembly through hole is optionally in concave-convex cooperation with the shaft end of the rotating shaft 30. In this way, the connection reliability between the code disc holder 40 and the rotating shaft 30 is ensured, and the position adjustment reliability of the code disc holder 40 relative to the rotating shaft 30 is also ensured.

[0034] As shown in the accompanying drawings, Figure 1 the end of the code disc holder 40 facing the assembly through hole has an adjusting hole, the end face of the rotating shaft 30 located in the receiving groove 11 forms a cavity 100 between the hole bottom face of the adjusting hole, an injection port 41 is arranged on the hole wall face of the adjusting hole, and the injection port 41 is in communication with the cavity 100 to perform glue injection operation into the cavity 100 through the injection port 41. In this way, the glue solution can fill the entire cavity 100 as much as possible by performing glue injection operation into the cavity 100 through the injection port 41, so that the connection reliability between the code disc holder 40 and the rotating shaft 30 is ensured after the glue solution solidifies, and the code disc holder 40 and the rotating shaft 30 will not shake during the subsequent rotation of the motor shaft driving the rotating shaft 30.

[0035] Further, the inner wall face of the adjusting hole has an internal thread structure, and the end outer periphery of the rotating shaft 30 has an external thread structure for cooperating with the internal thread structure.

[0036] It should be noted that in the present application, before the glue injection operation is performed through the injection port 41 into the cavity 100, the coaxiality of the code disc 50 and the rotating shaft 30 should be less than 5um.

[0037] As shown in Figure 2 and Figure 3 , the end of the rotating shaft 30 located in the accommodating groove 11 has at least one communication gap 311 for communicating the connection between the cavity 100 and the two. In this way, it is ensured that the glue liquid injected into the cavity 100 can smoothly flow into the connection between the code disc holder 40 and the rotating shaft 30, thereby gluing the connection between the code disc holder 40 and the rotating shaft 30, and ensuring the connection stability between the two.

[0038] It should be noted that in the present application, the communication gap 311 is used to communicate the threaded connection between the cavity 100 and the two.

[0039] As shown in Figure 3 , the cross section of the communication gap 311 in its extension direction is V-shaped. In this way, it is ensured that the V-shaped communication gap 311 reliably communicates the connection between the cavity 100 and the two.

[0040] It should be noted that in the present application, in order to ensure that the operator can smoothly inject the glue liquid into the cavity 100 through the injection port 41, as shown in Figure 1 , an operation port 111 is provided on the groove wall surface of the accommodating groove 11, and the operation port 111 is used to communicate the outside and the accommodating groove 11. In this way, the operation port 111 provides an operation space for the operator, ensuring the operation convenience of the operator.

[0041] As shown in Figure 1 , one end of the code disc holder 40 towards the main control panel 20 has 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 towards the main control panel 20 is flush with the surface of the boss structure 42 towards the main control panel 20. In this way, the boss structure 42 plays a limiting role for the code disc 50, and in addition, by setting the surface of the code disc 50 towards the main control panel 20 flush with the surface of the boss structure 42 towards the main control panel 20, the code disc holder 40 and the code disc 50 can smoothly rotate without interfering with the main control panel 20 during the process of the motor shaft driving the code disc holder 40 and the code disc 50 on it to rotate.

[0042] It should be noted that in the present application, the code disc 50 and the code disc holder 40 are glued and connected.

[0043] As shown in Figure 1As shown, at least one bearing 60 is arranged between the outer circumferential side of the rotating shaft 30 at the assembly through hole and the hole wall surface of the assembly through hole. In this way, the rotation reliability of the rotating shaft 30 relative to the support base 10 is ensured.

[0044] It should be noted that in the present application, as Figure 1 shown, the bearings 60 are two, and the two bearings 60 are arranged in an axial direction of the rotating shaft 30 and are in a clearance fit or interference fit with the hole wall surface of the assembly through hole.

[0045] As shown in Figure 1 and Figure 2 , in the direction from the accommodating groove 11 to the assembly through hole, the rotating shaft 30 sequentially includes a first shaft section 31, a second shaft section 32, and a third shaft section 33 connected in sequence, wherein the first shaft section 31 is located in the accommodating groove 11, the second shaft section 32 is located in the assembly through hole, and the third shaft section 33 is located outside the assembly through hole. In this way, by arranging the rotating shaft 30 in the form of the first shaft section 31, the second shaft section 32, and the third shaft section 33, the connection reliability between the rotating shaft 30 and the support base 10 is ensured, and the rotation reliability of the rotating shaft 30 is also ensured.

[0046] As shown in Figure 1 and Figure 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 < R2 < R3.

[0047] It should be noted that in the present application, the main control board 20 is fixed at the slot opening of the accommodating groove 11 of the support base 10, and the main control board 20 is provided with a photosensitive element 21, a communication module, a power supply module, a signal processing module, a connector module, etc. The main control board 20 supplies power to the photosensitive element 21 and other modules through the power supply module thereon. The photosensitive element 21 transmits analog or digital signals to the signal processing module by sensing the change of light. The signal processing module analyzes and filters the signals, and finally transmits them to external equipment through the communication module and the connector module.

[0048] It should be noted that in the present application, the installation process of the encoder is as follows:

[0049] First, the two bearings 60 are installed on the hole wall surface of the assembly through hole by means of gap fit or interference fit (adhesive method can be used), then the code disc 50 is connected with the code disc holder 40 by adhesive, and the assembled code disc 50 and code disc holder 40 are installed on the rotating shaft 30 in a screwed manner, then the main control board 20 is covered on the slot opening of the accommodating groove 11, and the main control board 20 is tightly connected with the support seat 10, finally the distance between the code disc 50 and the photosensitive element 21 is adjusted, and the distance between the two can be observed by a device capable of displaying the distance in real time during the adjustment process, when the distance between the two is adjusted to the preset distance, finally the adhesive is injected into the cavity 100 through the injection port 41, and the adhesive flows into the threaded connection between the code disc holder 40 and the rotating shaft 30 under the drainage effect of the communication gap 311, and after the adhesive is solidified, the code disc holder 40 and the rotating shaft 30 are tightly connected in the radial and axial directions.

[0050] It is to be 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 according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0051] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings shown in the figures are not drawn to scale for ease of illustration of the various components. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as being within the scope of the application. In the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation on the scope of the application. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion with regard thereto is deemed necessary.

[0052] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof shall relate to the application as it is oriented in the drawing figures. The terms "on", "above", "under", "below" and derivatives thereof shall relate to the application as it is oriented in the drawing figures. Where, for purposes of clarity, directional terms are used in the description, it should be understood that relative terms such as "above" and "below" and "up" and "down" are used to describe the relative positions for purposes of explanation only. Changes in both the recited position and the use of the terms will depend on the context in which it is used and on the position of the device being described. The terms "first", "second", "third", etc., do not necessarily indicate any ordinal, chronological or relative importance, but are merely used to distinguish one element from another.

[0053] It is also important to note that the term "or" as used herein is intended to mean an inclusive "or", such that "A or B" means any or all of the items listed with no options required to be selected with the item. As used herein, the term "includes" and / or "including", shall mean, and are used in the same manner as the term "comprising" when this term is used in the description and claims of the application.

[0054] It is also noted that the figures may not be drawn to scale, and that the dimensions of the various features in these figures can have been exaggerated for the sake of clarity and convenience in the drawings.

[0055] The foregoing is merely illustrative of the principles of this application and various modifications can be made by those skilled in the art without departing from the scope and spirit of the application. The above specification, examples and data provide a complete description of the manufacture and use of the composition of the application. The specification is not intended to produce a of the application, as this information can be presented in other formats consistent with the of the application.

Claims

1. An encoder, characterized in that, include: The support base (10) has a receiving groove (11) and an assembly through hole communicating with the receiving groove (11). A main control board (20) is covered at the opening of the receiving groove (11), and a photosensitive element (21) is provided on the surface of the main control board (20) facing the assembly through hole. A rotating shaft (30), at least a portion of which passes through the mounting through hole and extends into the receiving groove (11); The code disk holder (40) is located in the receiving groove (11) and connected to the end of the rotating shaft (30). The code disk holder (40) is axially adjustable on the rotating shaft (30) to adjust the distance between the code disk (50) on the code disk holder (40) and the photosensitive element (21). The code plate holder (40) has an adjustment hole at one end facing the assembly through hole. A cavity (100) is formed between the end face of the rotating shaft (30) located in the receiving groove (11) and the bottom surface of the adjustment hole. An injection port (41) is provided on the hole wall of the adjustment hole, and the injection port (41) is connected to the cavity (100) so as to perform glue injection operation into the cavity (100) through the injection port (41).

2. The encoder according to claim 1, characterized in that, The code disk holder (40) is threaded to the end of the rotating shaft (30).

3. The encoder according to claim 1, characterized in that, The end of the code disk holder (40) facing the mounting through hole is in a concave-convex fit with the shaft end of the rotating shaft (30).

4. The encoder according to claim 1, characterized in that, The end of the shaft (30) located in the receiving groove (11) has at least one communication notch (311) for connecting the cavity (100) to the connection between the two.

5. The encoder according to claim 4, characterized in that, The connecting gap (311) has a V-shaped cross-section in its extending direction.

6. The encoder according to any one of claims 1 to 5, characterized in that, An operating port (111) is provided on the wall of the receiving tank (11), and the operating port (111) is used to connect the outside world with the receiving tank (11).

7. The encoder according to any one of claims 1 to 5, characterized in that, The code disk holder (40) has a boss structure (42) at one end facing the main control board (20). The code disk (50) is sleeved on the outer periphery of the boss structure (42), and the surface of the code disk (50) facing the main control board (20) is flush with the surface of the boss structure (42) facing the main control board (20).

8. The encoder according to any one of claims 1 to 5, characterized in that, At least one bearing (60) is provided between the outer peripheral side of the shaft (30) located at the assembly through hole and the hole wall surface of the assembly through hole.

9. The encoder according to any one of claims 1 to 5, characterized in that, In the direction from the receiving groove (11) to the assembly through hole, the rotating shaft (30) sequentially includes a first shaft segment (31), a second shaft segment (32), and a third shaft segment (33) connected to each other, wherein the first shaft segment (31) is located in the receiving groove (11), the second shaft segment (32) is located in the assembly through hole, and the third shaft segment (33) is located outside the assembly through hole.

10. The encoder according to claim 9, characterized in that, The shaft diameter R1 of the first shaft segment (31), the shaft diameter R2 of the second shaft segment (32), and the shaft diameter R3 of the third shaft segment (33) satisfy: R1 < R2 < R3.

11. A motor assembly, characterized in that, It includes an encoder and a motor shaft, the encoder being connected to the motor shaft, and the encoder being the encoder described in any one of claims 1 to 10.

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