Angle encoder rotor structure, angle encoder and machine tool

Abstract

The utility model discloses an angle encoder rotor structure, an angle encoder and a machine tool, and the angle encoder rotor structure comprises a rotor installation seat, the middle part of which is provided with a shaft hole penetrating from the front surface of the rotor installation seat to the back surface of the rotor installation seat, and the front surface and / or the back surface of the rotor installation seat is provided with an axial extension wall continuously extending along the axial direction from the hole wall of the shaft hole; the axial extension wall is provided with a first fastener mounting hole formed in the radial direction; and the rotor sensing sheet is arranged on the front surface of the rotor mounting seat. According to the utility model, the axial extension wall is provided with the first fastener installation hole, so that the angle encoder rotor structure can be installed on a measured shaft through a fastener of the first fastener installation hole. A radial locking mounting mode is adopted, so that the diameter of a shaft hole of the encoder can be effectively increased under the condition that the outer diameter of the encoder is not increased and only the inner edge of the rotor mounting seat needs to be changed, and the adaptability of the encoder is higher; meanwhile, the development cost and the development period can be remarkably reduced, and the rapid market change requirement is met.

Description

Technical Field

[0001] This utility model is applicable to the field of encoders, and in particular relates to an angle encoder rotor structure, an angle encoder, and a machine tool. Background Technology

[0002] In recent years, with the rapid development of capacitive grating, time-grating, and magneto-electric encoders, a modular encoder structure has emerged on the market. This encoder structure is divided into two independent components: a stator assembly and a rotor assembly. Users install the stator assembly on the base and the rotor assembly on the shaft being measured. This type of encoder offers advantages such as convenient and quick installation, high accuracy, and the modular structure makes it easier to create a hollow structure, better suited to the wiring requirements of hollow direct-drive turntables, making it popular among users. However, because the modular structure eliminates bearings and other connecting parts, resulting in a more compact structure, the assembly reliability of components such as the sensor chip, signal processing circuit board, and protective housing is more challenging, placing higher demands on the encoder's structural design. As motor size increases, the diameter of its hollow holes also increases, requiring the encoder's rotor inner hole to expand accordingly. To ensure the signal quality of the sensor chip, the encoder's outer diameter must also increase, which is unfavorable for small-sized motors with large hollow structures.

[0003] In related technologies, the current modular encoder structure has the following problems: 1) The compactness of the modular structure places higher demands on the reliability of the sensor chip, signal processing circuit board, and protective housing assembly structure. Even slight loosening due to weak adhesive bonding can affect the encoder's accuracy or even prevent it from working properly; 2) The mounting screws of the stator and rotor assemblies are mostly axially mounted. In particular, the axial mounting of the rotor assembly requires a larger space for the hollow hole, making the hollow hole of the encoder smaller; 3) If the hollow hole is to be enlarged, the outer diameter of the encoder assembly needs to be increased, which reduces its adaptability. Moreover, the sensor chip, signal processing circuit board, and protective housing all need to be redesigned, and the matching test fixtures also need to be redesigned, which significantly increases the development cost and development cycle.

[0004] In summary, the problems existing in the relevant technologies urgently need to be solved. Utility Model Content

[0005] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide an angle encoder rotor structure, an angle encoder, and a machine tool.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] In a first aspect, an angle encoder rotor structure includes:

[0008] A rotor mounting base has a shaft hole in the middle that extends from the front side of the rotor mounting base to the back side of the rotor mounting base. The front side and / or the back side of the rotor mounting base have an axially extending wall that extends axially from the hole wall of the shaft hole. The axially extending wall has a first fastener mounting hole that is opened radially.

[0009] The rotor sensing element is disposed on the front side of the rotor mounting base.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the axially extending wall is continuous circumferentially along the shaft hole, forming an annular shape protruding from the front of the rotor mounting base.

[0011] In combination with the first aspect and the above-described implementation, in some implementations of the first aspect, the axially extending wall is provided with a plurality of first fastener mounting holes, and the plurality of first fastener mounting holes are distributed circumferentially along the axially extending wall.

[0012] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the front side of the rotor mounting base is provided with a first inner edge step and a first outer edge step, the inner edge of the rotor sensing plate is fitted to the first inner edge step, the outer edge of the rotor sensing plate is fitted to the first outer edge step, the front side of the rotor sensing plate is exposed and flush with the front side of the rotor mounting base, and the back side of the rotor sensing plate is surrounded by the rotor mounting base.

[0013] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the rotor mounting base forms a first annular groove recessed toward the back side of the rotor mounting base between the first inner edge step and the first outer edge step.

[0014] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, an annular boss is provided in the first annular groove, the inner edge of the rotor sensing sheet is glued to the first inner edge step, the outer edge of the rotor sensing sheet is glued to the first outer edge step, and the back side of the rotor sensing sheet is glued to the annular boss.

[0015] In a second aspect, an angle encoder includes the angle encoder rotor structure described in any implementation of the first aspect.

[0016] In conjunction with the second aspect, some implementations of the second aspect further include an angle encoder stator structure, which includes a stator sensing plate, a signal processing circuit board, and a stator mounting base. The front side of the stator mounting base faces the front side of the rotor mounting base. Both the stator sensing plate and the signal processing circuit board are annular. The signal processing circuit board is disposed on the back side of the stator sensing plate. The outer diameter of the signal processing circuit board is smaller than the outer diameter of the stator sensing plate, and the inner diameter of the signal processing circuit board is larger than the inner diameter of the stator sensing plate. The front of the mounting base is provided with a second inner edge step and a second outer edge step. The inner edge of the stator sensor is fitted to the second inner edge step, and the outer edge of the stator sensor is fitted to the second outer edge step. The stator mounting base forms a second annular groove recessed towards the back side of the stator mounting base between the second inner edge step and the second outer edge step. The signal processing circuit board is embedded in the second annular groove. The front of the stator sensor is exposed and flush with the front of the stator mounting base. The back sides of the stator sensor and the signal processing circuit board are surrounded by the stator mounting base.

[0017] In combination with the second aspect and the above-described implementations, in some implementations of the second aspect, the stator mounting base has a second fastener mounting hole that is axially opened.

[0018] Thirdly, a machine tool including the angle encoder described in any implementation of the second aspect.

[0019] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of this utility model, an axially extending wall is provided in the rotor mounting base, extending axially from the hole wall of the shaft hole. A first fastener mounting hole is further provided in the axially extending wall, allowing the angle encoder rotor structure to be mounted on the measured shaft through the fastener in the first fastener mounting hole. The angle encoder rotor structure of this utility model adopts a radial locking mounting method, which can effectively increase the shaft hole diameter of the encoder without increasing the outer diameter of the encoder, only requiring modification of the inner edge of the rotor mounting base, thus making the encoder more adaptable. At the same time, it can significantly reduce development costs and development cycle, meeting the rapidly changing needs of the market.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of an embodiment of the rotor structure of the angle encoder of this utility model;

[0023] Figure 2 This is an exploded structural diagram of one embodiment of the rotor structure of the angle encoder of this utility model;

[0024] Figure 3 This is a schematic diagram of the rotor mounting base structure, which is an embodiment of the angle encoder rotor structure of this utility model.

[0025] Figure 4 This is a schematic cross-sectional view of the rotor mounting base, representing an embodiment of the angle encoder rotor structure of this utility model.

[0026] Figure 5 This is a schematic diagram of an embodiment of the stator structure of the angle encoder of this utility model;

[0027] Figure 6 This is an exploded structural diagram of one embodiment of the stator structure of the angle encoder of this utility model;

[0028] Figure 7 This is a schematic diagram of the stator sensor chip and signal processing circuit board structure of an embodiment of the angle encoder stator structure of this utility model;

[0029] Figure 8 This is a schematic diagram of the stator mounting base structure of an embodiment of the angle encoder stator structure of this utility model;

[0030] Figure 9 This is a cross-sectional schematic diagram of the stator mounting base, which is an embodiment of the stator structure of the angle encoder of this utility model. Detailed Implementation

[0031] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0032] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0033] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0034] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0035] See Figures 1-4 An embodiment of this utility model provides an angle encoder rotor structure, including a rotor mounting base 100 and a rotor sensing plate 200. The rotor mounting base 100 has a shaft hole 101 in the middle, which extends from the front side of the rotor mounting base 100 to the back side of the rotor mounting base 100. The shaft hole 101 is used to cooperate with the shaft under test to install the angle encoder rotor structure on the shaft under test. The front side and / or the back side of the rotor mounting base 100 has an axially extending wall 102 that extends axially from the hole wall of the shaft hole 101. The axially extending wall 102 has a first fastener mounting hole 103 that is opened radially. The rotor sensing plate 200 is disposed on the front side of the rotor mounting base 100.

[0036] Combination Figures 1-4 In the technical solution of this utility model, an axially extending wall 102, which extends axially from the wall of the shaft hole 101, is provided in the rotor mounting base 100. A first fastener mounting hole 103 is further provided in the axially extending wall 102, allowing the angle encoder rotor structure to be mounted on the measured shaft via the fasteners in the first fastener mounting hole 103. The angle encoder rotor structure of this utility model adopts a radial locking mounting method, abandoning the axial locking mounting method used in the prior art. This avoids occupying the radial space of the rotor mounting base 100, thereby effectively increasing the diameter of the encoder's shaft hole 101 without increasing the encoder's outer diameter, only requiring modification of the inner edge of the rotor mounting base 100, making the encoder more adaptable. Simultaneously, it significantly reduces development costs and development cycle, meeting the rapidly changing needs of the market.

[0037] In some embodiments, see Figures 1-4The axially extending wall 102 is continuous along the circumference of the shaft hole 101, forming an annular shape protruding from the front of the rotor mounting base 100. The axially extending wall 102 is located on the inner edge of the rotor mounting base 100. The first fastener mounting hole 103 is radial, and the mounting position is on the cylindrical surface of the inner edge of the rotor mounting base 100. The first fastener mounting hole 103 can be set as a threaded hole, and the mounting screw is placed on the shaft being measured during use.

[0038] Further, see Figures 1-4 The axial extension wall 102 is provided with a plurality of first fastener mounting holes 103, which are distributed circumferentially along the axial extension wall 102 to ensure the installation stability and accuracy of the rotor mounting seat 100 and the measured shaft.

[0039] It is understandable that the axially extending wall 102 can also be configured to be circumferentially discontinuous along the shaft hole 101.

[0040] The rotor sensor 200 has a circular hollow structure. The front of the rotor sensor 200 is printed with a sensing pattern, while the back is not printed with a sensing pattern. The rotor sensor 200 can be directly mounted on the front of the rotor mounting base 100.

[0041] In some embodiments, see Figures 1-4 The rotor mounting base 100 has a first inner edge step 104 and a first outer edge step 105 on its front side. The inner edge of the rotor sensing plate 200 is fitted onto the first inner edge step 104. The outer diameter of the first outer edge step 105 on the front side of the rotor mounting base 100 is slightly larger than the outer diameter of the rotor sensing plate 200. The inner diameter of the first inner edge step 104 on the front side of the rotor mounting base 100 is slightly smaller than the inner diameter of the rotor sensing plate 200. The depth of the first inner edge step 104 and the first outer edge step 105 is basically the same as the thickness of the rotor sensing plate 200. The outer edge of the rotor sensing plate 200 is fitted onto the first outer edge step 105. The inner edge of the rotor sensing plate 200 is glued to the first inner edge step 104, and the outer edge of the rotor sensing plate 200 is glued to the first outer edge step 105. The front side of the rotor sensing plate 200 is exposed and flush with the front side of the rotor mounting base 100 for direct alignment with the stator structure of the angle encoder. The back of the rotor sensor 200 is surrounded by the rotor mounting base 100 for protection.

[0042] In some embodiments, see Figures 2-4 The rotor mounting base 100 forms a first annular groove 106 recessed toward the back side of the rotor mounting base 100 between the first inner edge step 104 and the first outer edge step 105. The rotor mounting base 100 forms a shell-like structure. This embodiment can reduce the weight of the angle encoder rotor structure.

[0043] Further, see Figures 2-4 An annular boss 107 is provided in the first annular groove 106. The back of the rotor sensor plate 200 is glued to the annular boss 107. The annular boss 107 is located between the first inner edge step 104 and the first outer edge step 105, thereby providing support and a bonding position for the rotor sensor plate 200 between the first inner edge step 104 and the first outer edge step 105, ensuring that the rotor sensor plate 200 can be more securely installed on the rotor mounting base 100.

[0044] An embodiment of this utility model also provides an angle encoder, including the angle encoder rotor structure of any of the above embodiments.

[0045] Furthermore, the angle encoder also includes an angle encoder stator structure. In use, the angle encoder stator structure and the angle encoder rotor structure are coaxially mounted, and the angle encoder stator structure and the angle encoder rotor structure are placed parallel to each other with a gap.

[0046] In some embodiments, see Figures 5-9 The angle encoder stator structure includes a stator sensing plate 300, a signal processing circuit board 400, and a stator mounting base 500. The stator sensing plate 300, signal processing circuit board 400, and stator mounting base 500 are all annular hollow structures. The front of the stator sensing plate 300 is printed with a sensing pattern, while the back is blank. The front of the stator mounting base 500 faces the front of the rotor mounting base 100. The signal processing circuit board 400 is located on the back of the stator sensing plate 300. The signal processing circuit board 400 and the stator sensing plate 300 can be connected as a whole using glue or other methods. The outer diameter of the signal processing circuit board 400 is smaller than the outer diameter of the stator sensing plate 300, while the inner diameter of the signal processing circuit board 400 is larger than the inner diameter of the stator sensing plate 300. The front side of the mounting base 500 is provided with a second inner edge step 501 and a second outer edge step 502. The stator mounting base 500 forms a second annular groove 503 recessed towards the back side of the stator mounting base 500 between the second inner edge step 501 and the second outer edge step 502. The outer diameter of the second outer edge step 502 on the front side of the stator mounting base 500 is slightly larger than the outer diameter of the stator sensor 300. The outer diameter of the second annular groove 503 on the front side of the stator mounting base 500 is slightly larger than the outer diameter of the signal processing circuit board 400. The inner diameter of the second inner edge step 501 on the front side of the stator mounting base 500 is slightly smaller than the inner diameter of the stator sensor 300. The inner diameter of the second annular groove 503 on the front side of the stator mounting base 500 is slightly smaller than the inner diameter of the signal processing circuit board 400.

[0047] The depths of the second inner edge step 501 and the second outer edge step 502 are approximately the same as the thickness of the stator sensing plate 300. The inner edge of the stator sensing plate 300 is fitted onto the second inner edge step 501, and the outer edge of the stator sensing plate 300 is fitted onto the second outer edge step 502. The signal processing circuit board 400 is embedded in the second annular groove 503. The front side of the stator sensing plate 300 is exposed and flush with the front side of the stator mounting base 500. The back sides of the stator sensing plate 300 and the signal processing circuit board 400 are surrounded by the stator mounting base 500 for protection.

[0048] See Figures 5-9 The stator mounting base 500 has a second fastener mounting hole 504 that is opened along the axial direction. The stator mounting base 500 can be securely mounted on the machine base by fasteners provided in the second fastener mounting hole 504.

[0049] An embodiment of this utility model also provides a machine tool, including the angle encoder in any of the above embodiments, the machine tool including but not limited to a rotary table, etc.

[0050] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A rotor structure for an angle encoder, characterized in that, include: A rotor mounting base has a shaft hole in the middle that extends from the front side of the rotor mounting base to the back side of the rotor mounting base. The front side and / or the back side of the rotor mounting base have an axially extending wall that extends axially from the hole wall of the shaft hole. The axially extending wall has a first fastener mounting hole that is opened radially. The rotor sensing element is disposed on the front side of the rotor mounting base.

2. The angle encoder rotor structure according to claim 1, characterized in that, The axially extending wall is continuous along the circumference of the shaft hole, forming an annular shape that protrudes from the front of the rotor mounting base.

3. The angle encoder rotor structure according to claim 2, characterized in that, The axially extending wall is provided with a plurality of first fastener mounting holes, which are distributed circumferentially along the axially extending wall.

4. The angle encoder rotor structure according to claim 1, characterized in that, The rotor mounting base has a first inner edge step and a first outer edge step on its front side. The inner edge of the rotor sensing plate is fitted onto the first inner edge step, and the outer edge of the rotor sensing plate is fitted onto the first outer edge step. The front side of the rotor sensing plate is exposed and flush with the front side of the rotor mounting base, while the back side of the rotor sensing plate is surrounded by the rotor mounting base.

5. The angle encoder rotor structure according to claim 4, characterized in that, The rotor mounting base has a first annular groove recessed towards the back side of the rotor mounting base between the first inner edge step and the first outer edge step.

6. The angle encoder rotor structure according to claim 5, characterized in that, The first annular groove is provided with an annular boss. The inner edge of the rotor sensing plate is glued to the first inner edge step, the outer edge of the rotor sensing plate is glued to the first outer edge step, and the back of the rotor sensing plate is glued to the annular boss.

7. An angle encoder, characterized in that, The rotor structure of the angle encoder as described in any one of claims 1 to 6.

8. The angle encoder according to claim 7, characterized in that, The system also includes an angle encoder stator structure, comprising a stator sensing plate, a signal processing circuit board, and a stator mounting base. The front side of the stator mounting base faces the front side of the rotor mounting base. Both the stator sensing plate and the signal processing circuit board are annular. The signal processing circuit board is disposed on the back side of the stator sensing plate. The outer diameter of the signal processing circuit board is smaller than the outer diameter of the stator sensing plate, and the inner diameter of the signal processing circuit board is larger than the inner diameter of the stator sensing plate. The front side of the stator mounting base has a second inner edge step and a second outer edge step. The inner edge of the stator sensing plate is fitted onto the second inner edge step, and the outer edge of the stator sensing plate is fitted onto the second outer edge step. The stator mounting base forms a second annular groove recessed towards the back side of the stator mounting base between the second inner edge step and the second outer edge step. The signal processing circuit board is embedded in the second annular groove. The front side of the stator sensing plate is exposed and flush with the front side of the stator mounting base. The back sides of the stator sensing plate and the signal processing circuit board are surrounded by the stator mounting base.

9. The angle encoder according to claim 8, characterized in that, The stator mounting base has a second fastener mounting hole that is opened along the axial direction.

10. A machine tool, characterized in that, The angle encoder included in any one of claims 7 to 9.

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