Rotating electrical machine with electromagnetic absolute value encoder

Abstract

A mounting bottom plate is fixed with an end cover of a motor body, a first abdicating hole is arranged on the mounting bottom plate, a rotating shaft of the motor body penetrates through the first abdicating hole to be fixed with a reducing sleeve, a second abdicating hole is arranged on a supporting plate, the reducing sleeve penetrates through the second abdicating hole to be fixed with an induction magnet, and the induction magnet is fixed with the electromagnetic absolute value encoder. The reducing sleeve is in clearance fit with the second receding hole, the supporting sleeve surrounds the periphery of the induction magnet, one end of the supporting sleeve, the supporting plate and the installation bottom plate are locked into a whole through connecting screws, the other end of the supporting sleeve is fixed to the induction unit, and the encoder shell surrounds the periphery of the supporting sleeve, the induction unit, the supporting plate and the installation bottom plate. And the encoder shell is fixedly connected with the mounting bottom plate. According to the utility model, the size of the encoder is reduced while high-precision position measurement of the motor is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor field, concretely relates to rotary motor with electromagnetic absolute value encoder. BACKGROUND

[0002] Motor refers to the electromagnetic device that realizes electric energy conversion or transmission according to electromagnetic induction law, and its main function is to generate driving torque as the power source of electric appliances or various machines.

[0003] In actual application, the motor itself cannot realize accurate position measurement, and when emergency power failure occurs in the working process, it is also impossible to accurately restore to the position before power failure after power restart, which is not conducive to the position monitoring of the application end. Therefore, an encoder is currently installed at the rear end of the motor to measure motor speed, position and other information and improve the running accuracy.

[0004] The existing encoder motor connects the sensing magnet with the rotating shaft, covers the sensing magnet with the integrated sensing unit for reading the encoding information, then fixes the integrated sensing unit with the motor end cover, then surrounds the integrated sensing unit with the encoder shell, fixes the encoder shell with the motor end cover, and the integrated sensing unit is composed of a support sleeve and a sensing unit. For this structure, radial protrusions need to be provided on the circumferential surface of the support sleeve and the encoder shell, which not only has a large volume, but also the encoder shell and the support sleeve are both formed by injection molding, so two sets of molds are required, resulting in high production cost. UTILITY MODEL CONTENTS

[0005] The utility model provides rotary motor with electromagnetic absolute value encoder, the utility model discloses when realizing motor high accuracy position measurement, the volume of encoder is reduced simultaneously.

[0006] The technical scheme for solving the above technical problem is as follows:

[0007] The rotary motor with electromagnetic absolute value encoder includes a motor body, a sensing magnet, a support sleeve, a sensing unit and an encoder shell, and further includes a mounting base, an adapter sleeve, a support plate and connecting screws. The mounting base is fixed with the end cover of the motor body, and the mounting base is provided with a first clearance hole. The rotating shaft of the motor body passes through the first clearance hole and is fixed with the adapter sleeve. The support plate is provided with a second clearance hole, and the adapter sleeve passes through the second clearance hole and is fixed with the sensing magnet. The adapter sleeve and the second clearance hole are gap matched. The support sleeve surrounds the sensing magnet. One end of the support sleeve is locked with the support plate and the mounting base into an integral whole through the connecting screws. The other end of the support sleeve is fixed with the sensing unit. The encoder shell surrounds the support sleeve, the sensing unit, the support plate and the mounting base. The encoder shell is fixedly connected with the mounting base.

[0008] Further, the peripheral surface of the supporting sleeve is provided with an assembling groove, the supporting plate is provided with a first mounting hole, the mounting bottom plate is provided with a second mounting hole, a connecting screw is matched with the assembling groove, passes through the first mounting hole and is screwed with the second mounting hole, so that the supporting sleeve, the supporting plate and the mounting bottom plate are locked into an integral whole.

[0009] Further, the mounting bottom plate is provided with a positioning hole, and the supporting plate is provided with a positioning column.

[0010] Further, the supporting plate is provided with a positioning block, the inner peripheral surface of the supporting sleeve is provided with a positioning sleeve, the positioning sleeve is matched with the positioning block in a clearance, the positioning sleeve is provided with a notch, and the rod part of the connecting screw passes through the notch, so that the positioning sleeve is pressed between the head part of the connecting screw and the supporting plate.

[0011] When the motor body works, the rotating shaft rotates, drives the adapter sleeve and the induction magnet to rotate, so that the position and strength of the magnetic field are changed. The change of the magnetic field is detected by the Hall sensor on the induction unit and is converted into an electric signal, then is processed through the circuit on the induction unit, and the position, speed and direction of rotation are output, that is, the accurate position value of the rotating shaft of the motor is obtained. In addition, in the utility model, since the mounting bottom plate is additionally arranged, the radial protrusion does not need to be arranged on the peripheral surface of the supporting sleeve and the encoder shell, so that the mold structure is simplified, the outer diameter of the supporting sleeve and the encoder shell is reduced, and the volume of the encoder is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a sectional structure view of the rotary motor with the electromagnetic absolute value encoder.

[0013] Figure 2 It is an exploded view of the rotary motor with the electromagnetic absolute value encoder.

[0014] Figure 3 It is Figure 1 the enlarged view of P part in the figure.

[0015] Figure 4 It is a perspective view of the supporting plate.

[0016] Figure 5 It is a matching view of the supporting sleeve and the positioning block.

[0017] Markings in the drawings:

[0018] Motor body 1, end cover 1a, rotating shaft 1b, induction magnet 2, support sleeve 3, assembly groove 3a, positioning sleeve 3b, notch 3c, induction unit 4, encoder shell 5, assembly hole 5a, mounting bottom plate 6, first clearance hole 6a, second mounting hole 6b, positioning hole 6c, radial protrusion 6d, threaded hole 6e, adapter sleeve 7, shaft head 7a, nut 7b, support plate 8, second clearance hole 8a, first mounting hole 8b, positioning column 8c, positioning block 8d, connecting screw 9, screw 10, fastening screw 11. DETAILED DESCRIPTION

[0019] The utility model will be described in further detail below in combination with the drawings and specific embodiments.

[0020] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a specific orientation, a specific orientation and operation, and therefore cannot be understood as a limitation on the utility model.

[0021] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0022] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] In the present application, unless otherwise expressly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly contacted through an intermediate medium. Moreover, the first feature "on", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0024] As shown in Figures 1 to 5 The rotating motor with the electromagnetic absolute value encoder comprises a motor body 1, an induction magnet 2, a supporting sleeve 3, an induction unit 4, an encoder shell 5, a mounting bottom plate 6, an adapter sleeve 7, a supporting plate 8, connecting screws 9, the mounting bottom plate 6 is fixed with an end cover 1a of the motor body 1, the mounting bottom plate 6 is provided with a first clearance hole 6a, the first clearance hole 6a is a stepped hole, a screw 10 is used to be screwed through the step in the first clearance hole 6a and the end cover 1a, so that the mounting bottom plate 6 and the end cover 1a are tightly integrated.

[0025] The rotating shaft 1b of the motor body 1 is fixed with the adapter sleeve 7 through the first clearance hole 6a, one end of the adapter sleeve 7 is provided with a blind hole arranged along the axial direction of the adapter sleeve 7, the rotating shaft 1b is inserted into the blind hole and is in clearance or interference fit with the blind hole, a radial through hole is arranged on the peripheral surface of the adapter sleeve 7, the radial through hole is communicated with the blind hole, a jacking screw is used to be screwed with the radial through hole, the end of the jacking screw is abutted against the peripheral surface of the rotating shaft 1b, so that the adapter sleeve 7 and the rotating shaft 1b are fixedly integrated.

[0026] The supporting plate 8 is provided with a second clearance hole 8a, the adapter sleeve 7 is fixed with the induction magnet 2 through the second clearance hole 8a, the adapter sleeve 7 is in clearance fit with the second clearance hole 8a, the other end of the adapter sleeve 7 is provided with a shaft head 7a, the outer diameter of the shaft head 7a is smaller than the outer diameter of the adapter sleeve 7, a shoulder is formed between the adapter sleeve 7 and the shaft head 7a, the peripheral surface of the shaft head 7a is provided with a thread, after the adapter sleeve 7 passes through the second clearance hole 8a, the induction magnet 2 is sleeved on the shaft head, a nut 7b is used to be screwed with the shaft head 7a, and the induction magnet 2 is pressed between the nut 7b and the shoulder.

[0027] The supporting sleeve 3 surrounds the induction magnet 2, one end of the supporting sleeve 3 is locked with the supporting plate 8 and the mounting bottom plate 6 into an integrated whole through the connecting screws 9, the other end of the supporting sleeve 3 is fixed with the induction unit 4, the encoder shell 5 surrounds the supporting sleeve 3, the induction unit 4, the supporting plate 8 and the mounting bottom plate 6, and the encoder shell 5 is fixedly connected with the mounting bottom plate 6.

[0028] In this embodiment, a radial protrusion 6d is further arranged on the peripheral surface of the mounting base plate 6. After the encoder shell 5 is gap-fitted with the peripheral surface of the support sleeve 3, the end of the encoder shell 5 abuts against the radial protrusion 6d. A threaded hole 6e is further arranged on the peripheral surface of the support sleeve 3, and an assembly hole 5a is arranged on the peripheral surface of the encoder shell 5. A fastening screw 11 is used to connect the assembly hole 5a and the threaded hole 6e, so that the encoder shell 5 is fastened with the mounting base plate 6 as a whole.

[0029] An assembly groove 3a is arranged on the peripheral surface of the support sleeve 3. A first mounting hole 8b is arranged on the support plate 8, and a second mounting hole 6b is arranged on the mounting base plate 6. The connecting screw 9 is gap-fitted with the assembly groove 3a, passes through the first mounting hole 8b, and is threadedly connected with the second mounting hole 6b, so that the support sleeve 3 is locked with the support plate 8 and the mounting base plate 6 as a whole.

[0030] A positioning hole 6c is arranged on the mounting base plate 6, and a positioning column 8c is arranged on the support plate 8. The positioning column 8c is inserted into the positioning hole 6c. After the positioning column 8c is combined with the positioning hole 6c, the installation position of the mounting base plate 6 can be preliminarily positioned, so that the connecting screw 9 is conveniently threadedly connected with the first mounting hole 8b and the second mounting hole 6b.

[0031] A positioning block 8d is arranged on the support plate 8, and a positioning sleeve 3b is arranged on the inner peripheral surface of the support sleeve 3. The positioning sleeve 3b is gap-fitted with the positioning block 8d. A notch 3c is arranged on the positioning sleeve 3b. After the rod part of the connecting screw 9 passes through the notch 3c, the positioning sleeve 3b is compressed between the head part of the connecting screw 9 and the support plate 8.

[0032] When the motor body 1 works, the rotating shaft 1b rotates, and drives the adapter sleeve 7 and the inductive magnet 2 to rotate, so as to change the position and strength of the magnetic field. The change of the magnetic field is detected by the Hall sensor on the inductive unit 4, and is converted into an electric signal. Then, the electric signal is processed by the circuit on the inductive unit 4, and the position, speed and direction of rotation are output, i.e. the accurate position value of the rotating shaft of the motor is obtained.

Claims

1. A rotary motor with an electromagnetic absolute encoder, comprising a motor body (1), an induction magnet (2), a support sleeve (3), an induction unit (4), and an encoder housing (5), characterized in that, It also includes a mounting base plate (6), an adapter sleeve (7), a support plate (8), and connecting screws (9). The mounting base plate (6) is fixed to the end cover (1a) of the motor body (1). The mounting base plate (6) has a first clearance hole (6a). The rotating shaft (1b) of the motor body (1) passes through the first clearance hole (6a) and is fixed to the adapter sleeve (7). The support plate (8) has a second clearance hole (8a). The adapter sleeve (7) passes through the second clearance hole (8a) and is fixed to the induction magnet (2). The sleeve (7) is fitted with the second clearance hole (8a) with a clearance. The support sleeve (3) surrounds the sensing magnet (2). One end of the support sleeve (3) is locked together with the support plate (8) and the mounting base plate (6) by connecting screws (9). The other end of the support sleeve (3) is fixed to the sensing unit (4). The encoder housing (5) surrounds the support sleeve (3), the sensing unit (4), the support plate (8), and the mounting base plate (6). The encoder housing (5) is fixedly connected to the mounting base plate (6).

2. The rotary motor with an electromagnetic absolute encoder according to claim 1, characterized in that, The support sleeve (3) has an assembly groove (3a) on its circumferential surface. The support plate (8) has a first mounting hole (8b) and the mounting base plate (6) has a second mounting hole (6b). The connecting screw (9) engages with the assembly groove (3a), passes through the first mounting hole (8b), and is threaded into the second mounting hole (6b) to lock the support sleeve (3), support plate (8), and mounting base plate (6) into one unit.

3. The rotary motor with an electromagnetic absolute encoder according to claim 1, characterized in that, The mounting base plate (6) is provided with a positioning hole (6c), and the support plate (8) is provided with a positioning post (8c), which is inserted into the positioning hole (6c).

4. The rotary motor with an electromagnetic absolute encoder according to claim 1, characterized in that, The support plate (8) is provided with a positioning block (8d), and the inner circumferential surface of the support sleeve (3) is provided with a positioning sleeve (3b). The positioning sleeve (3b) and the positioning block (8d) are in clearance fit. The positioning sleeve (3b) is provided with a notch (3c). After the rod of the connecting screw (9) passes through the notch (3c), the positioning sleeve (3b) is pressed between the head of the connecting screw (9) and the support plate (8).

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