Sensor and motor

Abstract

The utility model discloses a sensor and a motor, and the sensor comprises a body part which extends along a first direction and is provided with an accommodation space, the accommodation space penetrates through the body part along the first direction, and the accommodation space is used for accommodating a motor shaft; the body part comprises an opening, the containing space communicates with the outside through the opening, and the opening is used for allowing a motor shaft to penetrate through and enter the containing space; the body part further comprises a connecting part, the connecting part extends outwards in the second direction away from the containing space, and the first direction intersects with the second direction. The connecting part comprises a positioning part, the positioning part is arranged on the side, close to the motor, of the connecting part in the first direction, the connecting part is used for being connected with the motor, and the positioning part is used for limiting movement of the sensor relative to the motor. The sensor is convenient to install, and the raw material cost and the process cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field, especially a kind of sensor and motor. BACKGROUND

[0002] With the rapid development of current electric vehicle industry, the development trend of motor rotor position sensor is more and more compact structure, more and more light weight, more and more small size, easy to install.However, the commonly used motor rotor position sensor appearance is closed, and the motor shaft must be passed through the center circle of the sensor during installation, which is complicated and high in cost.

[0003] Therefore, it is urgent to design a sensor that is easier to integrate to meet the design needs of the market. SUMMARY

[0004] The utility model discloses a kind of sensor and motor, sensor is easy to install, can reduce raw material cost and process cost.

[0005] To solve the above technical problems, the embodiment of the utility model discloses a kind of sensor, applied to motor, the motor includes motor shaft, the sensor includes: body portion, extend along first direction, with accommodating space, the accommodating space is through the body portion along the first direction, the accommodating space is used to accommodate the motor shaft;The body portion includes opening, the accommodating space is communicated with outside by the opening, the opening is used for the motor shaft to pass through and enter the accommodating space;The body portion further includes connecting portion, the connecting portion extends outward along second direction away from the accommodating space, the first direction and the second direction intersect;The connecting portion includes positioning portion, along the first direction, the positioning portion is located at the side of the connecting portion close to the motor, the connecting portion is used to connect the motor, and the positioning portion is used to limit the movement of the sensor relative to the motor.

[0006] Using the above technical scheme, the body portion of the embodiment of the application can be across motor shaft.That is to say, the appearance design of the sensor of the embodiment of the application is not closed, it does not need to be set on the motor shaft from one end of the motor shaft, but can approach the motor shaft from any direction parallel to the side plane of end cover, and make the motor shaft can enter the accommodating space through the opening.Compared with the shaft-through sensor in the prior art, not only the opening part can save raw material cost, but also the installation mode of the sensor of the embodiment of the application is more convenient and flexible.

[0007] In addition, the sensor of the embodiment of the present application can be connected with the motor through the positioning part of the connecting part to play the role of accurate positioning, so as to accurately position the sensor on the motor. Furthermore, only the connecting part of the sensor needs to be connected with the motor, and then the sensor can be installed on the motor. Compared with the installation of the shaft-penetrating sensor in the prior art, the installation process can be made more convenient and fast, the number of bolts used during installation can be saved, and the cost of raw materials can be reduced.

[0008] According to another specific embodiment of the present application, the embodiment of the present application discloses a sensor, wherein the body part comprises a recess, and the recess comprises: a first end part; a second end part, which is arranged at intervals with the first end part to define the opening; and a middle part, wherein the inner wall of the middle part defines the accommodation space, and the middle part is used to cross the motor shaft so that the motor shaft is accommodated in the accommodation space.

[0009] According to another specific embodiment of the present application, the embodiment of the present application discloses a sensor, wherein a plurality of connecting parts are arranged at intervals in the middle part and symmetrically with respect to the accommodation space along the first direction.

[0010] According to another specific embodiment of the present application, the embodiment of the present application discloses a sensor, wherein each connecting part comprises a connecting hole and a positioning part, the connecting hole and the positioning part are arranged at intervals, and the connecting hole is used to be fixedly connected with the motor through a bolt.

[0011] According to another specific embodiment of the present application, the embodiment of the present application discloses a sensor, wherein the positioning part comprises a positioning pin, the positioning pin extends along the first direction, and the positioning pin is protruded from the connecting part.

[0012] According to another specific embodiment of the present application, the embodiment of the present application discloses a sensor, wherein the body part further comprises an extension part and a cable, the extension part extends along a third direction, the cable is arranged at one end of the extension part away from the accommodation space, and the third direction intersects with the first direction.

[0013] The embodiment of the utility model discloses a motor, include: motor shaft, along the first direction extension, the sensor of any one embodiment described above, the motor shaft is housed in the accommodating space, end cover has with the fixed part of corresponding connection portion, the fixed part with the connection portion interconnect, the fixed part includes with the limiting portion of corresponding positioning part, the positioning part with the limiting portion interconnect, target wheel, along the first direction, the target wheel is equipped with in the motor shaft, and is located the body part is close to the side of end cover, the target wheel can be relative the body part rotates along the fourth direction, the fourth direction surrounds the first direction.

[0014] According to another specific embodiment of the utility model, the embodiment of the utility model discloses a motor, the fixed part includes fixed hole, the limiting portion includes limiting hole, along the first direction, the fixed hole with the connecting hole of the connection portion is fixedly connected through bolt, the positioning pin of the positioning part is interference connected with the limiting hole.

[0015] Adopt the technical scheme, the embodiment of the application can be first through the positioning pin and the limiting hole interference connection, to carry out accurate positioning, make the connecting hole and the fixed hole through bolt thread connection again, not only can guarantee the positioning requirement of sensor installation, make installation more simple, can also reduce the number of installation hole (for example is bolt hole), further reduce raw material cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Show the three-dimensional schematic diagram of the through shaft type electronic rotor sensor;

[0017] Figure 2 Show the three-dimensional schematic diagram of the motor and sensor of the embodiment of the utility model;

[0018] Figure 3 Show the three-dimensional schematic diagram of the motor of the embodiment of the utility model;

[0019] Figure 4 Show the three-dimensional schematic diagram of the sensor of the embodiment of the utility model. DETAILED DESCRIPTION

[0020] The following describes the embodiments of the present application with specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Although the description of the present application will be introduced in combination with the preferred embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0021] It should be noted that in this specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated sensor or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0023] The terms "first", "second", and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present embodiment, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; 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, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0025] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0026] In the prior art, an electronic rotor sensor with a shaft is usually used as a sensor of a motor.

[0027] Figure 1 A perspective view of the sensor is shown.

[0028] As shown in Figure 1 , the sensor 1 has a circular through hole 11 and five bolt holes 12 arranged along the circumference of the sensor 1. The circular through hole 11 is used for the motor shaft (not shown in the figure) of the motor to pass through, and the bolt holes 12 are used to fix the sensor 1 on the motor. However, the through hole 11 is a closed circle as a whole and is closed to the outside, that is, the through hole 11 is not connected to the outside, which leads to the need to pass the motor shaft of the motor through the through hole 11 of the sensor 1 and then fixedly connect the five bolt holes 12 of the sensor 1 when the sensor 1 is installed on the motor. Moreover, the sensor 1 often needs to be locked after being sleeved on the motor shaft of the motor, and then the position of the sensor 1 can be fixed.

[0029] Therefore, the electronic rotor sensor of the prior art has the problems of complicated installation, difficult positioning and high material cost.

[0030] In order to simplify the installation process, facilitate positioning and reduce material cost, the embodiments of the present application provide a sensor 2, which is designed by a non-closed structure of the sensor 2, so that the sensor 2 can be conveniently installed on the motor 3.

[0031] Referring to Figure 2 and Figure 3 , the embodiments of the present application also provide a motor 3. Wherein, the motor 3 of the embodiments of the present application comprises: a sensor 2, a motor shaft 31, an end cover 32 and a target wheel 33.

[0032] Specifically, as shown in Figure 2 , the sensor 2 comprises a body part 20 and a connecting part 21. The body part 20 has an accommodation space 201, the accommodation space 201 penetrates through the body part 20 along a first direction (as shown in the X direction in Figure 2 , the motor shaft 31 extends along the first direction (as shown in the X direction in Figure 2 , and the motor shaft 31 is accommodated in the accommodation space 201. The body part 20 further comprises an opening 202, and the accommodation space 201 is connected to the outside through the opening 202, so that the motor shaft 31 can extend along a third direction (as shown in the Y direction in Figure 2The sensor 2 passes through the opening 202 and enters the receiving space 201 (as shown in the Y direction). In this embodiment, "outside" refers to the space outside the receiving space 201. The sensor 2 is fixedly connected to the end cap 32 via the connecting part 21, so that the body part 20 straddles the motor shaft 31. Exemplarily, in this embodiment, the projection of the receiving space 201 along the first direction X is fan-shaped, and the connecting part 21 extends outward from the receiving space 201 along the second direction E (i.e., the radial direction of the projection of the receiving space 201 along the first direction X). The second direction E intersects the first direction X, and the third direction Y intersects the first direction X.

[0033] like Figure 3 As shown, the target wheel 33 is sleeved on the motor shaft 31 along the first direction X, located on the side of the body 20 near the end cover 32. Furthermore, the target wheel 33 can be positioned relative to the body 20 along a fourth direction (e.g., ...). Figure 2 and Figure 3 The sensor 2 of this embodiment rotates in the direction R, thereby detecting the angle, direction, and speed of the target wheel 33, and thus obtaining the angle, direction, and speed of the motor shaft 31 of the motor 3. Exemplarily, the end cap 32 also has a through hole 322 for the motor shaft 31 and the target wheel 33 to extend out. The fourth direction R (i.e., the rotation direction of the motor shaft 31) surrounds the first direction X (i.e., the extension direction of the motor shaft 31).

[0034] Therefore, the main body 20 of this embodiment can be mounted across the motor shaft 31. In other words, the sensor 2 of this embodiment is not enclosed in shape; it does not need to be fitted onto the motor shaft 31 from one end, but can be mounted from a plane parallel to the end cover 32 (e.g., Figure 2 The sensor 2 of this embodiment is positioned in any direction close to the motor shaft 31 (as shown in the dashed box A in the diagram), allowing the motor shaft 31 to enter the receiving space 201 through the opening 202. Compared to the through-shaft sensor 1 in the prior art, this not only saves on raw material costs for the opening 202 portion, but also makes the installation method of the sensor 2 in this embodiment more convenient and flexible.

[0035] In addition, continue to refer to Figure 3 In this embodiment, the end cap 32 has a fixing part 321 corresponding to the connecting part 21 of the sensor 2, and the connecting part 21 is provided on the body part 20. The fixing part 321 and the connecting part 21 are connected to each other, and the positioning part 211 and the limiting part 3211 are connected to each other, so that the body part 20 is connected to the end cap 32, thereby fixing the sensor 2 to the motor 3.

[0036] It can be understood that the number of the connecting portion 21 of the sensor 2 and the fixing portion 321 of the end cover 32 in the embodiment of the application can include one or more. Exemplarily, two connecting portions 21 are symmetrically arranged in the first direction X on the body portion 20. For the convenience of description, one of the two connecting portions 21 and one of the two fixing portions 321 are taken as an example for description below.

[0037] Exemplarily, as shown in Figure 3 The fixing portion 321 of the embodiment of the application includes a fixing hole 3212, and the connecting portion 21 includes a connecting hole 212. The fixing hole 3212 and the connecting hole 212 are bolt holes. The fixing hole 3212 and the connecting hole 212 are threadedly connected by a bolt (not shown in the figure) in the first direction (as shown in the X direction in Figure 2 and Figure 3 , so as to fixedly connect the connecting portion 21 and the fixing portion 321. However, the connecting mode of the fixing hole 3212 and the connecting hole 212 is not limited in the embodiment of the application, as long as the fixing hole 3212 and the connecting hole 212 can be connected to each other, so that the sensor 2 and the motor 3 can be connected and fixed. For example, the fixing hole 3212 and the connecting hole 212 can also be riveted or welded.

[0038] The connecting portion 21 described above includes a positioning portion 211, and the fixing portion 321 includes a limiting portion 3211 corresponding to the positioning portion 211. The positioning portion 211 and the limiting portion 3211 are connected to each other, so that the sensor 2 and the motor 3 are positioned by the positioning portion 211 and the limiting portion 3211 before being connected by the connecting portion 21 and the fixing portion 321, thereby facilitating the installation of the sensor 2 on the motor 3.

[0039] It can be understood that the number of the positioning portion 211 of each connecting portion 21 and the number of the limiting portion 3211 of each fixing portion 321 in the embodiment of the application can include one or more. For the convenience of description, one of the positioning portion 211 and one of the limiting portion 3211 are taken as an example for description below.

[0040] Exemplarily, as shown in Figure 3As shown, the limiting portion 3211 of the embodiment of the present application includes a limiting hole 32111, for example, a pit reserved on the surface of the end cover 32 extending along the first direction X, and the positioning portion 211 includes a positioning pin 2111 extending along the first direction X, for example, a cylindrical column protruding from the surface of the connecting portion 21, and the outer surface has three protrusions 21111 extending along the first direction X, so that the positioning pin 2111 can be inserted into the limiting hole 32111 along the first direction X and connected with the limiting hole 32111 in interference. However, the specific structure of the positioning pin 2111 and the limiting hole 32111 is not limited in the embodiment of the present application, as long as the positioning pin 2111 and the limiting hole 32111 can be connected with each other to limit the movement of the body portion 20 relative to the end cover 32, for example, the positioning pin 2111 can also be a column with a square or triangular cross section, and the limiting hole 32111 can also be a pit with a square or triangular cross section.

[0041] Therefore, the sensor 2 of the embodiment of the present application can be connected with the limiting portion 3211 reserved on the end cover 32 through the positioning portion 211 of the connecting portion 21 before being fixedly connected with the fixing hole 3212, so as to play a precise positioning role and accurately position the sensor 2 on the motor 3. Further, only two connecting holes 212 of the sensor 2 need to be respectively threadedly connected with the corresponding two fixing holes 3212 through bolts, so as to install the sensor 2 on the motor 3. Compared with the installation of the shaft-penetrating sensor 1 in the prior art, the installation process can be made more convenient and fast, the number of bolts used during installation can be saved, and the cost of raw materials can be reduced.

[0042] The structure and working principle of the sensor 2 of the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0043] Figure 4 A perspective view of the sensor 2 of the embodiment of the present application is shown.

[0044] Reference Figure 4 The body portion 20 of the sensor 2 of the embodiment of the present application includes a recessed portion 22, an extending portion 23 and a cable 24.

[0045] Specifically, as Figure 4 shown, the recessed portion 22 has a first end portion 221, a second end portion 222 and an intermediate portion 223. The accommodating space 201 is located at the intermediate portion 223 of the recessed portion 22, and the opening 202 is located between the first end portion 221 and the second end portion 222 of the recessed portion 22. That is, the first end portion 221 and the second end portion 222 are arranged in a spaced manner to define the opening 202, and the inner wall 2231 of the intermediate portion 223 defines the accommodating space 201, in combination Figure 2When the motor shaft 31 is accommodated within the accommodating space 201, the intermediate portion 223 spans across the motor shaft 31. Exemplarily, in this embodiment, the projection of the recess 22 in the first direction X is arc-shaped, and the projection of the accommodating space 201 in the first direction X, defined by the recess 22, is fan-shaped. However, this is not a limitation; the embodiments of this application do not specifically limit the structure of the recess 22, the accommodating space 201, and the opening 202, as long as they can be used to allow the motor shaft 31 to pass through the opening 202 and be accommodated within the accommodating space 201.

[0046] The aforementioned extension 23 extends along a third direction (e.g.) Figure 4 Extending in the Y direction, cable 24 is located at one end 2301 of the extension 23 away from the receiving space 201. Cable 24 is used to connect to an external device to transmit the detection data of sensor 2 to the external device (e.g., the vehicle controller).

[0047] In summary, the main body 20 of this embodiment has a receiving space 201 and an opening 202, which makes the sensor 2's shape unclosed, facilitating installation. Its shape is smaller than existing through-shaft sensors, reducing raw material costs. Furthermore, the precise positioning of the positioning part 211 on the connecting part 21 with the limiting part 3211 of the motor 3 not only ensures the positioning requirements of the sensor 2 installation, making installation simpler, but also reduces the number of mounting holes (e.g., bolt holes), further lowering raw material costs.

[0048] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A sensor for use in an electric machine, the electric machine comprising an electric machine shaft, characterized in that, The sensor comprises: a body portion extending along a first direction, having a receiving space extending through the body portion along the first direction, the receiving space being configured to receive the motor shaft; the body portion comprises an opening through which the receiving space is in communication with the outside, the opening being configured to allow the motor shaft to pass through and enter the receiving space; the body portion further comprises a connecting portion extending outwardly along a second direction away from the receiving space, the first direction intersecting the second direction; the connecting portion comprises a positioning portion disposed on a side of the connecting portion close to the motor along the first direction, the connecting portion being configured to connect the motor, and the positioning portion being configured to limit the movement of the sensor relative to the motor.

2. The sensor of claim 1, wherein, the body portion comprises a recess, the recess comprising: a first end portion; a second end portion spaced apart from the first end portion to define the opening; a middle portion, an inner wall of the middle portion defining the receiving space, the middle portion being configured to cross the motor shaft so that the motor shaft is received in the receiving space.

3. The sensor of claim 2, wherein, a plurality of connecting portions are provided, the plurality of connecting portions being spaced apart from each other on the middle portion and symmetrically disposed relative to the receiving space along the first direction.

4. The sensor of claim 3, wherein, each of the connecting portions comprises a connecting hole and the positioning portion, the connecting hole being spaced apart from the positioning portion, and the connecting hole being configured to be fixedly connected to the motor by a bolt.

5. The sensor according to claim 1 or 4, characterized in that the positioning portion comprises a positioning pin extending along the first direction and protruding from the connecting portion.

6. The sensor of claim 1, wherein, the body portion further comprises an extension portion extending along a third direction and a cable provided at an end of the extension portion away from the receiving space, the third direction intersecting the first direction.

7. An electric machine characterized by The sensor comprises: a motor shaft extending along a first direction; the sensor according to any one of claims 1 to 6, the motor shaft being received in the receiving space; an end cover having a fixing portion corresponding to the connecting portion, the fixing portion being connected to the connecting portion, the fixing portion comprising a limiting portion corresponding to the positioning portion, the limiting portion being connected to the positioning portion; a target wheel sleeved on the motor shaft and located on a side of the body portion close to the end cover along the first direction, the target wheel being capable of rotating relative to the body portion along a fourth direction surrounding the first direction.

8. The electric machine of claim 7, wherein, the fixing portion comprises a fixing hole, and the limiting portion comprises a limiting hole; along the first direction, the fixing hole is fixedly connected to the connecting hole of the connecting portion by a bolt, and the positioning pin of the positioning portion is interference-connected to the limiting hole.

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