Encoder support, encoder and motor

Abstract

The utility model relates to an encoder support, an encoder and a motor, the encoder support comprises a support body and a flange protruding out of the end face of the support body, the flange is fixedly connected with the support body, and a clamping groove used for fixing a circuit board is defined by the flange and the end face of the support body. The flange comprises at least one elastic clip, and the elastic clip is used for abutting against the peripheral side wall of the circuit board through elastic deformation so as to clamp and fix the circuit board in the clamping groove. The elastic clip directly abuts against the peripheral side wall of the circuit board, and the elastic clip and the circuit board are in gapless close fit, so that the circuit board is better positioned, and the position precision of the circuit board is improved; and the clamped and fixed circuit board does not move on the bracket, so that the position of the circuit board can be stably kept, the condition that the position of the circuit board deviates is avoided, good position precision between a to-be-sensed element and a sensor in the encoder can be ensured, and the accuracy of position measurement is improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to an encoder bracket, an encoder, and a motor. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy and is widely used in various mechanical equipment, automation systems, and household appliances. To ensure performance and stability during motor operation, an encoder is typically installed within the motor. This encoder monitors the position of the motor shaft in real time, allowing control strategies to be adjusted to ensure optimal motor operation.

[0003] The encoder includes a sensor and a sensed element. The sensed element is fixed to the motor shaft and rotates with the motor shaft. The sensor is mounted on a circuit board and is used to sense the rotation of the sensed element, thereby obtaining the rotation parameters of the motor shaft. Currently, the circuit board is typically fixed to the encoder bracket with screws. The encoder bracket has corresponding threaded holes for the screws to enter. There is a gap between the threaded holes and the screws, and the position of the circuit board is prone to shifting before and during the screw insertion process. As a result, the actual installation position of the circuit board will deviate from its expected installation position, which directly affects the positional accuracy between the sensed element and the sensor, reducing the accuracy of position measurement. Summary of the Invention

[0004] The present application provides an encoder bracket, an encoder, and a motor, which can solve the problem of low accuracy in measuring the position of a rotating shaft.

[0005] According to one aspect of the present application, an encoder bracket is provided in one embodiment, including a bracket body and a flange protruding from the end face of the bracket body, the flange is fixedly connected to the bracket body, and is enclosed with the end face of the bracket body to form a slot for fixing a circuit board, the flange includes at least one elastic clip, and the elastic clip is used to elastically deform against the outer side wall of the circuit board to clamp the circuit board in the slot.

[0006] In one embodiment, the flange further includes at least one non-elastic fixing portion, and the fixing portion and the elastic clip are alternately arranged circumferentially.

[0007] In one embodiment, the elastic clip and the bracket body are integrally injection molded, and / or the fixing portion and the bracket body are integrally injection molded.

[0008] In one embodiment, the flange is provided with at least two constituent groups, each of the constituent groups includes two of the elastic clips and at least one non-elastic fixing portion, and each of the constituent groups has the same circumferential size and is equally spaced along the circumference.

[0009] In one embodiment, a first groove is provided on the end surface of the bracket body, and the elastic clip is connected and fixed to the bottom of the first groove, and the bottom of the first groove is lower than the bottom of the clamping groove.

[0010] In one embodiment, the end of the elastic clip close to the notch of the slot is a free end, and a guiding inclined surface or a guiding arc surface is provided on the inner side of the free end.

[0011] In one embodiment, at least two second grooves are provided at the bottom of the card slot, and a support portion for supporting the circuit board is formed between two adjacent second grooves.

[0012] In one embodiment, the support portion is provided with a connection hole, and the connection hole is used to fix the circuit board by screws.

[0013] According to another aspect of the present application, an encoder is provided in an embodiment, comprising a circuit board, an encoder rotor, and an encoder bracket as described in any one of the above items, one end of the bracket being used to be fixed to the rear end of the motor body, the circuit board being fixed in the slot, a sensor being provided on the circuit board, one end of the encoder rotor being used to be fixedly connected to the motor shaft, the encoder rotor comprising an element to be sensed, the sensor corresponding to the position of the element to be sensed to obtain position information of the motor shaft.

[0014] According to another aspect of the present application, an embodiment provides a motor, including a motor body, a motor shaft and the encoder as described above, wherein the motor shaft is arranged inside the motor body and is rotatably connected to the motor body.

[0015] According to the encoder bracket, encoder and motor of the above-mentioned embodiment, the circuit board is clamped and fixed in the slot on the bracket body by an elastic clip. The elastic clip is directly pressed against the outer peripheral side wall of the circuit board. The elastic clip and the circuit board are tightly fitted without gaps, which better positions the circuit board and improves the position accuracy of the circuit board. After being clamped and fixed, the circuit board will not move on the bracket. The position of the circuit board can be stably maintained, avoiding the situation of circuit board position deviation, ensuring good position accuracy between the sensed element and the sensor in the encoder, and improving the accuracy of position measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of an encoder bracket according to an embodiment;

[0017] Figure 2 Schematic diagram of the cross-sectional structure of an encoder bracket according to an embodiment;

[0018] Figure 3 This is a schematic structural diagram of a circuit board fixed in a slot according to an embodiment;

[0019] Figure 4 A schematic cross-sectional view of a circuit board fixed in a slot according to an embodiment;

[0020] Description of reference numerals:

[0021] 1- bracket body, 101- first groove, 102- second groove, 103- support part, 104- mounting hole;

[0022] 2- flange, 201- elastic clip, 202- fixing part;

[0023] 3-Card slot; 4-Connection hole; 5-Circuit board. DETAILED DESCRIPTION

[0024] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0025] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0026] Component numbers used herein, such as "first" and "second," are used solely to distinguish the components being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0027] The encoder includes a sensor and an element to be sensed. The element to be sensed is fixed to the motor shaft and rotates with the motor shaft. The sensor is set on a circuit board and is used to sense the rotation of the element to be sensed, thereby obtaining the rotation parameters of the motor shaft. When the circuit board is fixed to the encoder bracket by screws, the actual installation position of the circuit board will deviate from its desired installation position due to the gap between the threaded hole and the screw, which in turn affects the position accuracy between the element to be sensed and the sensor, reducing the accuracy of position measurement. However, the present application uses elastic clips to clamp the circuit board in the card slot on the bracket body, avoiding the situation where the circuit board position is offset, solving the above-mentioned problem, and improving the accuracy of position measurement.

[0028] See also Figures 1 to 4 An embodiment of the present application provides an encoder bracket, including a bracket body 1, a flange 2, and other functional components or structures that exist as needed, which are described in detail below.

[0029] The flange 2 in this embodiment is arranged to protrude from the end face of the bracket body 1. The flange 2 is fixedly connected to the bracket body 1 and is enclosed with the end face of the bracket body 1 to form a slot 3 for fixing the circuit board 5. The flange 2 includes at least one elastic clip 201. The elastic clip 201 is used to press against the outer peripheral side wall of the circuit board 5 through elastic deformation, thereby clamping the circuit board 5 in the slot 3.

[0030] It will be understood that the flange 2 in this embodiment is a protruding structure on the end surface of the bracket body 1. The flange 2 and the end surface of the bracket body 1 enclose a slot 3, the end surface of the bracket body 1 serving as the bottom of the slot 3, and the inner side surface of the flange 2 serving as the side wall of the slot 3. The elastic clip 201 in this embodiment is elastic. When the circuit board 5 is pressed into the slot 3, the elastic clip 201 is squeezed by the circuit board 5 and elastically deforms outward from the slot 3 until the circuit board 5 contacts the bottom of the slot 3, at which point the elastic clip 201 stops deforming. After deformation, the elastic clip 201 has a tendency to recover, maintaining its position against the side wall of the circuit board 5, thereby clamping and securing the circuit board 5. After securing, the elastic clip 201 and the circuit board 5 form a tight fit with no gaps, effectively positioning the circuit board 5 and improving the positional accuracy of the circuit board 5.

[0031] In one embodiment, Figure 1As shown, the flange 2 also includes at least one non-elastic fixing portion 202, and the fixing portions 202 and the elastic clips 201 are arranged alternately along the circumference. In this embodiment, the fixing portions 202 are non-elastic and provide a basic positioning for the circuit board 5, improving the positioning accuracy of the circuit board 5. At the same time, the elastic clips 201 clamp and secure the circuit board 5, ensuring that the good positioning accuracy of the circuit board 5 is not affected. The provision of the fixing portions 202 further improves the positioning accuracy of the circuit board 5. In this embodiment, the circumferential direction refers to the circumferential direction of the bracket body 1. The fixing portions 202 and the elastic clips 201 alternately form the circular sidewalls of the slot 3 along the circumference, and the outer periphery of the circuit board 5 is also circular. This embodiment does not limit the specific number of elastic clips 201. For example, there can be only one elastic clip 201, with one elastic clip 201 resting against the side wall of the circuit board 5, and the opposite side of the circuit board 5 resting against the fixing portion 202. Through the pressing action of the elastic clip 201, the position of the circuit board 5 can still be stably maintained. Alternatively, there can be two, three, or even more elastic clips 201, with multiple elastic clips 201 resting against the outer peripheral side wall of the circuit board 5, to better clamp and fix the circuit board 5. In some application scenarios, the flange 2 may not include the fixing portion 202, and the side walls of the slot 3 can be directly formed by multiple elastic clips 201.

[0032] In one embodiment, the elastic clip 201 is integrally injection molded with the bracket body 1, and / or the fixing portion 202 is integrally injection molded with the bracket body 1. Integral injection molding is more conducive to mass production. During production, the elastic clip 201 and the fixing portion 202 can be formed separately by controlling the thickness of the plastic at corresponding positions, thereby improving production efficiency. The elastic clip 201 and the fixing portion 202 do not need to be assembled, thus avoiding the situation where the position accuracy of the elastic clip 201 and the fixing portion 202 is reduced due to assembly.

[0033] In some application scenarios, under the premise of ensuring good position accuracy of the elastic clip 201 and the fixing portion 202 , they can also be arranged on the bracket body 1 through other connection methods.

[0034] In one embodiment, the flange 2 is provided with at least two component groups, each including two elastic clips 201 and at least one fixing portion 202. Each component group has the same circumferential dimensions and is evenly spaced along the circumference. Having two elastic clips 201 in one component group allows for a sufficiently wide area of ​​tight fit between each component group and the sidewall of the circuit board 5, resulting in better positioning. Furthermore, the width of each elastic clip 201 can be relatively small, ensuring good elasticity of the elastic clip 201. This embodiment does not limit the number of fixing portions 202 in each component group; one, two, or more fixing portions 202 can be provided, depending on the needs. This embodiment also does not limit the order in which the elastic clips 201 and fixing portions 202 are arranged in each component group. For example, when two fixing portions 202 are provided, the two elastic clips 201 can be positioned between the two fixing portions 202. When only one fixing portion 202 is provided, the fixing portion 202 can be positioned between the two elastic clips 201. The flange 2 in this embodiment can be provided with two constituent groups, and the two constituent groups are respectively provided on two opposite sides; the flange 2 can also be provided with three constituent groups, and the three constituent groups are evenly spaced along the circumferential direction, and an angle of 120 degrees is formed between each constituent group; or the flange 2 can be provided with four constituent groups, and the four constituent groups are evenly spaced along the circumferential direction, and an angle of 90 degrees is formed between each constituent group.

[0035] In one embodiment, a first groove 101 is provided on the end surface of the bracket body 1, and an elastic clip 201 is connected and fixed to the bottom of the first groove 101. The bottom of the first groove 101 is lower than the bottom of the slot 3. In this embodiment, the bottom of the slot 3 is the end surface of the bracket body 1. The bottom of the first groove 101 is lower than the bottom of the slot 3, which allows the elastic clip 201 to be higher, more conducive to elastic deformation of the elastic clip 201. In addition, the bottom of the elastic clip 201 has poor elasticity and is lower than the bottom of the slot 3, not forming the sidewalls of the slot 3. Instead, the slot 3 is formed by the more elastic portion of the elastic clip 201 and the end surface of the bracket body 1. This allows the elastic clip 201 to better secure the circuit board 5. In some application scenarios, the bottom of the first groove 101 can also be made flush with the bottom of the slot 3 as needed.

[0036] In one embodiment, Figure 1 、 Figure 2 As shown, the end of the elastic clip 201 closest to the slot 3 is a free end, and a guiding bevel or curved surface is provided on the inner side of the free end. In this embodiment, the inner side of the free end is the side closest to the center of the slot 3. Both the guiding bevel and the guiding curved surface can guide the insertion of the circuit board 5 during assembly, allowing the circuit board 5 to be more smoothly inserted into the slot 3. In some embodiments, the elastic clip 201 may not be provided with a guiding structure, and instead a guiding bevel or curved surface may be provided on the circuit board 5.

[0037] In one embodiment, the bottom of the card slot 3 is provided with at least two second grooves 102, with a support portion 103 for supporting the circuit board 5 formed between adjacent second grooves 102. The provision of the second grooves 102 eliminates interference between components on the circuit board 5 and the bottom of the card slot 3, while also saving material and reducing costs. In this embodiment, the depths of the second grooves 102 can be the same or different, and the specific shape of the second grooves 102 is not limited in this embodiment; any support portion 103 can be formed.

[0038] In one embodiment, the support portion 103 is provided with a connecting hole 4, and the connecting hole 4 is used to fix the circuit board 5 by a screw. The screw cooperates with the connecting hole 4 to further fix the circuit board 5, and the circuit board 5 is better fixed on the encoder bracket. The connecting hole 4 in this embodiment can be a threaded hole. This embodiment does not limit the number of connecting holes 4, for example, two or more can be provided. In some embodiments, in order to better fix the circuit board 5, a limiting protrusion can also be provided at the free end of the elastic clip 201. After the circuit board 5 is inserted into the card slot 3, the protrusion of the elastic clip 201 presses against the end surface of the circuit board 5 to limit and fix the circuit board 5.

[0039] The bracket body 1 in this embodiment may also have other functional structures. For example, the bracket body 1 may be provided with a mounting hole 104 for supporting the motor shaft via a bearing. The mounting hole 104 passes through the bracket body 1 and communicates with the slot 3. Alternatively, the bracket body 1 may be provided with a mounting portion for connecting to the motor housing, such as a connecting lug structure.

[0040] The encoder bracket of the above embodiment clamps and fixes the circuit board 5 in the slot 3 on the bracket body 1 through the elastic clip 201. The elastic clip 201 directly presses against the outer peripheral side wall of the circuit board 5. The elastic clip 201 and the circuit board 5 are tightly fitted without any gap, which better positions the circuit board 5 and improves the position accuracy of the circuit board 5. After being clamped and fixed, the circuit board 5 will not move on the bracket. The position of the circuit board 5 can be stably maintained, avoiding the position deviation of the circuit board 5, ensuring good position accuracy between the sensed element and the sensor in the encoder, and improving the accuracy of position measurement.

[0041] See also Figure 3 、 Figure 4 The embodiment of the present application also provides an encoder, including a circuit board 5, an encoder rotor, and the encoder bracket as described above, one end of the encoder bracket is used to be fixed to the rear end of the motor body, the circuit board 5 is fixed in the card slot 3, a sensor is provided on the circuit board 5, one end of the encoder rotor is used to be fixedly connected to the motor shaft, the encoder rotor includes a sensed element, and the sensor corresponds to the position of the sensed element to obtain the position information of the motor shaft.

[0042] The encoder in this embodiment can be an optical encoder or a magnetic encoder. In the case of an optical encoder, the encoder rotor is a code disk, the element to be sensed is a code track provided on the code disk, and the sensor on the circuit board 5 is a photosensitive element. Furthermore, the encoder includes a light source, with the code disk positioned between the light source and the photosensitive element. The code disk is fixed to the motor shaft and can rotate with the motor shaft. In the case of a magnetic encoder, the encoder rotor is a magnet or a magnetic ring, the element to be sensed is a magnetic pole on the magnet or magnetic ring, and the sensor can be a Hall effect device that senses voltage changes or a magnetoresistive device that senses magnetic field changes. The magnet or magnetic ring is fixed to the motor shaft to correspond to the sensor. The encoder bracket in this embodiment is the same as that in the above embodiment and will not be described in detail here.

[0043] The encoder of this embodiment fixes the circuit board 5 through the encoder bracket. The encoder bracket is provided with a slot 3. The circuit board 5 is clamped and fixed in the slot 3 on the bracket body 1 by an elastic clip 201. The elastic clip 201 is directly pressed against the outer peripheral side wall of the circuit board 5. The elastic clip 201 and the circuit board 5 are tightly fitted without any gap, which better positions the circuit board 5 and improves the position accuracy of the circuit board 5. After being clamped and fixed, the circuit board 5 will not move on the bracket. The position of the circuit board 5 can be stably maintained, avoiding the situation where the position of the circuit board 5 is offset, ensuring good position accuracy between the sensed element and the sensor in the encoder, and improving the accuracy of position measurement.

[0044] An embodiment of the present application further provides a motor, comprising a motor body, a motor shaft, and the encoder as described above, wherein the motor shaft is disposed inside the motor body and is rotationally connected to the motor body.

[0045] In this embodiment, the encoder bracket and the motor body can be fixed by screws or bolts, or can also be fixed by bonding, clamping, etc. In this embodiment, after the encoder rotor is fixed to the motor shaft, it can rotate together with the motor shaft, and the sensor senses the rotation of the element to be sensed to obtain the real-time position of the motor shaft. The motor in this embodiment is not limited to the above structure, but also includes other functional components or structures that exist as needed, such as a rotor and a stator. The stator is fixed in the housing, and the rotor is set in the stator. The axis of the rotor is the motor shaft.

[0046] The motor provided in the above embodiment includes an encoder, and the encoder fixes the circuit board 5 through an encoder bracket. The encoder bracket is provided with a slot 3, and the circuit board 5 is clamped and fixed in the slot 3 on the bracket body 1 by an elastic clip 201. The elastic clip 201 is directly pressed against the outer peripheral side wall of the circuit board 5. The elastic clip 201 and the circuit board 5 are tightly fitted without gaps, which better positions the circuit board 5 and improves the position accuracy of the circuit board 5; and the circuit board 5 after being clamped and fixed will not move on the bracket, and the position of the circuit board 5 can be stably maintained, avoiding the situation where the position of the circuit board 5 is offset, and can ensure good position accuracy between the sensed element and the sensor in the encoder, thereby improving the accuracy of position measurement.

[0047] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For those skilled in the art of the present application, based on the concept of the present application, they can also make some simple deductions, modifications or substitutions.

Claims

1. An encoder bracket, characterized in that: It includes a bracket body and a flange protruding from the end face of the bracket body. The flange is fixedly connected to the bracket body and encloses the end face of the bracket body to form a slot for fixing the circuit board. The flange includes at least one elastic clip, which is used to press against the outer side wall of the circuit board through elastic deformation to clamp the circuit board in the slot.

2. The encoder bracket according to claim 1, characterized in that The flange further includes at least one non-elastic fixing portion, and the fixing portion and the elastic clip are alternately arranged in a circumferential direction.

3. The encoder bracket according to claim 2, characterized in that The elastic clip and the bracket body are integrally injection-molded, and / or the fixing portion and the bracket body are integrally injection-molded.

4. The encoder bracket according to claim 1, characterized in that The flange is provided with at least two constituent groups, each of which includes two elastic clips and at least one non-elastic fixing portion. The constituent groups have the same circumferential size and are distributed at equal intervals along the circumference.

5. The encoder bracket according to claim 1, characterized in that A first groove is provided on the end surface of the bracket body, and the elastic clip is connected and fixed to the bottom of the first groove, and the bottom of the first groove is lower than the bottom of the clamping groove.

6. The encoder bracket according to any one of claims 1 to 5, characterized in that: One end of the elastic clip close to the slot opening of the clamping slot is a free end, and a guiding inclined surface or a guiding arc surface is provided on the inner side of the free end.

7. The encoder bracket according to any one of claims 1 to 5, characterized in that: At least two second grooves are provided at the bottom of the card slot, and a support portion for supporting the circuit board is formed between two adjacent second grooves.

8. The encoder bracket according to claim 7, characterized in that The supporting portion is provided with a connecting hole, and the connecting hole is used to fix the circuit board by screws.

9. An encoder, characterized in that It includes a circuit board, an encoder rotor, and an encoder bracket according to any one of claims 1 to 8, one end of the bracket is used to be fixed to the rear end of the motor body, the circuit board is fixed in the slot, a sensor is provided on the circuit board, one end of the encoder rotor is used to be fixedly connected to the motor shaft, the encoder rotor includes a sensed element, and the sensor corresponds to the position of the sensed element to obtain position information of the motor shaft.

10. A motor, characterized in that: It comprises a motor body, a motor shaft and the encoder as claimed in claim 9, wherein the motor shaft is arranged inside the motor body and is rotatably connected to the motor body.

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