Sensor

Abstract

The embodiment of the utility model provides a sensor which comprises a shell, a supporting part fixedly connected with the shell, a limiting part arranged at the other end of the shell and a detection part located on the radial inner side of a joint part of the supporting part, the supporting part comprises a cover part, the joint part and an abutting part, and the limiting part abuts against the abutting part in the axial direction. The detection part abuts against the joint part and the bottom of the housing in the axial direction. According to the embodiment of the invention, the shell, the supporting part, the limiting part and the detection part are fixedly connected with one another to form the hollow structure of the sensor, and the stability among all the parts can be achieved without resin filling, so that the detection characteristic of the sensor is improved, the assembly time is reduced, and the investment cost is saved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of industrial automation technology, and particularly to a sensor. Background Art

[0002] In the existing sensor structures, for example, for proximity sensors, when assembling the various components of the sensor, in order to ensure the stability between the components inside the sensor, full resin filling or semi-filling is usually adopted between the components of the sensor.

[0003] It should be noted that the above introduction of the background art is only for the convenience of clearly and completely explaining the technical solutions of the present application and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present application. Summary of the Utility Model

[0004] The inventor found that in the above existing structure, since the dielectric constant of the resin filled in the internal structure of the sensor is several times that of air, it may have a greater adverse impact on the detection performance of the sensor (for example, proximity sensor); and, since resin filling is required when assembling the sensor, the assembly is cumbersome and time-consuming.

[0005] To solve one of the above problems or other similar problems, the embodiments of the present application provide a sensor, which adopts a hollow structure in which the various components are connected to each other, and the stability between the components can be achieved without resin filling, thereby improving the detection characteristics of the sensor.

[0006] According to one aspect of the embodiments of the present application, there is provided a sensor, wherein the sensor includes: a cylindrical outer shell having a bottom; a support portion fixedly connected to the outer shell, the support portion including a cover portion provided at one end of the outer shell, a joint portion extending from the cover portion to the other end of the outer shell, and an abutting portion provided at the end of the joint portion away from the cover portion, the joint portion and the abutting portion being provided inside the outer shell; a limiting portion provided at the other end of the outer shell, axially abutting against the abutting portion; and a detection portion, at least a part of the detection portion being located radially inside the joint portion, one end of the detection portion close to the cover portion axially abutting against the joint portion, and the other end of the detection portion away from the cover portion axially abutting against the bottom of the outer shell.

[0007] In some embodiments, the limiting portion is integrally formed with the outer shell, and the limiting portion is formed as a rabbet portion extending radially inward from the inner circumferential surface of the outer shell; or the limiting portion is separately formed from the outer shell.

[0008] In some embodiments, the joint portion includes a first main body portion extending axially from the cover portion toward the other end of the housing, and a first arm portion and a second arm portion extending from the first main body portion toward the other end of the housing and alternately arranged in the circumferential direction. The number of the first arm portions is at least two, and the two first arm portions are opposed to each other in the radial direction. The abutting portion is provided at the overhanging end portion of the first arm portion. The number of the second arm portions is at least two, and the two second arm portions are opposed to each other in the radial direction.

[0009] In some embodiments, a guide groove is formed in the second arm portion, and the guide groove has a wall portion extending radially inward from the inner wall of the second arm portion.

[0010] In some embodiments, the detection portion abuts against the wall portion in the circumferential direction and abuts against the inner wall in the radial direction.

[0011] In some embodiments, the abutting portion is a ring-shaped structure made of a resin having elastic deformation, and the abutting portion is integrally or separately formed with the first arm portion.

[0012] In some embodiments, when the limiting portion is separately formed from the housing, the limiting portion is an electrode of the sensor or the limiting portion is fixedly connected to the housing.

[0013] In some embodiments, the housing includes a clamping portion, and the support portion further includes a engaging portion. The support portion is engaged and connected with the housing through the engagement of the engaging portion and the clamping portion. The engaging portion is provided on the cover portion and is located radially outside the joint portion. The engaging portion extends axially from the cover portion toward the other end of the housing. The engaging portion includes a second main body portion extending axially from the cover portion toward the other end of the housing and a buckle portion protruding radially outward from the second main body portion. The buckle portion abuts against the clamping portion in the axial direction, and the radially outer peripheral surface of the second main body portion abuts against the inner peripheral surface of the housing in the radial direction.

[0014] In some embodiments, the sensor further includes a buffer portion provided between one end of the detection portion close to the cover portion and the joint portion, abutting against the detection portion in the axial direction, and the detection portion abuts against the joint portion in the axial direction through the buffer portion.

[0015] In some embodiments, the number of the buffer portions is the same as the number of the guide grooves, and the buffer portions are engaged with the wall portions of the guide grooves.

[0016] One of the beneficial effects of the embodiments of the present application lies in that: according to the embodiments of the present application, by fixedly connecting the housing, the support portion, the limiting portion and the detection portion to form a hollow structure of the sensor, the stability between the components can be achieved without resin filling, thereby improving the detection characteristics of the sensor; and through the structure of such a sensor, the assembly man-hours can be reduced.

[0017] Referring to the following description and the drawings, specific embodiments of the present application are disclosed in detail, indicating the ways in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope thereby. Within the spirit and terms of the appended claims, the embodiments of the present application include many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, are used to illustrate the embodiments of the present application, and together with the written description are used to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0019] Figure 1 is a schematic diagram of the sensor according to the embodiment of the present application;

[0020] Figure 2 is a top view of the sensor according to the embodiment of the present application;

[0021] Figure 3 is along Figure 2 sectional view taken along line A-A' of;

[0022] Figure 4 is along Figure 2 sectional view taken along line B-B' of;

[0023] Figure 5 is along Figure 2 another sectional view taken along line B-B' of;

[0024] Figure 6 is another schematic diagram of the sensor according to the embodiment of the present application;

[0025] Figure 7 is along Figure 2 sectional view taken along line C-C' of;

[0026] Figure 8 is a schematic diagram of the support portion according to the embodiment of the present application;

[0027] Figure 9 is Figure 8 enlarged view of the dashed box T of;

[0028] Figure 10 It is a schematic diagram of the buffer part of the embodiment of the present application. Specific implementation manners

[0029] Referring to the accompanying drawings, through the following description, the foregoing and other features of the present application will become apparent. In the description and drawings, specific implementation manners of the present application are specifically disclosed, which show some implementation manners in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described implementation manners. On the contrary, the present application includes all modifications, variations, and equivalents falling within the scope of the appended claims.

[0030] In the embodiments of the present application, terms such as "first" and "second" are used to distinguish different elements in terms of name, but do not indicate the spatial arrangement or time sequence of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. Terms such as "comprising", "including", and "having" mean the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0031] In the embodiments of the present application, the singular forms "a", "the", etc. include the plural forms and should be broadly understood as "a kind" or "a class" rather than being limited to the meaning of "one"; in addition, the term "the" should be understood to include both the singular form and the plural form unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least partially according to...", and the term "based on" should be understood as "at least partially based on...", unless the context clearly indicates otherwise.

[0032] In the following description of the present application, unless otherwise specified, the direction extending along the central axis of the sensor housing or the direction parallel to it is referred to as "axial" (the direction D1 shown below) Figure 2 as shown), the direction along the radius centered on the central axis is referred to as "radial"; the direction close to the central axis is referred to as "radially inner" or "inner", and the direction away from the central axis is referred to as "radially outer" or "outer"; the direction around the central axis is referred to as "circumferential"; the end of the sensor where the cover of the support part is located is referred to as "one axial end", and the end of the sensor where the bottom of the housing is located is referred to as "the other axial end". It should be noted that these are only for the convenience of description and do not limit the orientation of the sensor during use and manufacture.

[0033] The following describes the implementation manners of the embodiments of the present application with reference to the accompanying drawings. These implementation manners are only exemplary and do not limit the embodiments of the present application.

[0034] An embodiment of the present application provides a sensor. Figure 1 It is a schematic diagram of the sensor according to the embodiment of the present application, showing an overall three-dimensional view; Figure 2 It is a top view of the sensor according to the embodiment of the present application; Figure 3 It is along Figure 2 The cross-sectional view taken along line A-A' of Figure 4 It is along Figure 2 The cross-sectional view taken along line B-B' of Figure 5 It is along Figure 2 Another cross-sectional view taken along line B-B' of , showing the view when observing the sensor from one axial end; Figure 6 It is another schematic diagram of the sensor according to the embodiment of the present application, showing the view when observing the sensor from one axial end after removing the housing.

[0035] As Figures 1 to 6 shown, the sensor 1 may include: a housing 10, a support portion 20, a limiting portion 30, and a detection portion 40.

[0036] In the embodiment of the present application, as Figures 1 to 5 shown, the housing 10 is cylindrical and has a bottom 101 at one end to the other end; the support portion 20 is fixedly connected to the housing 10. The support portion 20 includes a cover portion 201 provided at one end (axial one end) of the housing 10, a joint portion 202 extending from the cover portion 201 to the other end (axial other end) of the housing 10, and an abutting portion 203 provided at one end of the joint portion 202 away from the cover portion 201. The joint portion 202 and the abutting portion 203 are provided inside the housing 10.

[0037] In the embodiment of the present application, as Figure 4 and Figure 5 shown, the limiting portion 30 is provided at the other end (axial other end) of the housing 10 and axially abuts against the abutting portion 203.

[0038] In the embodiment of the present application, as Figure 4 and Figure 6 shown, at least a part of the detection portion 40 is located radially inside the joint portion 202. One end of the detection portion 40 close to the cover portion 201 axially abuts against the joint portion 202, and the other end of the detection portion 40 away from the cover portion 201 axially abuts against the bottom 101 of the housing 10.

[0039] According to the above embodiments, through the fixed connection between the support portion 20 and the housing 10, the mutual positioning between the support portion 20 and the housing 10 can be achieved. Through the axial abutment between the limiting portion 30 and the support portion 20, the axial positioning between the limiting portion 30 and the support portion 20 can be achieved. Through the axial abutment of the detection portion 40 with the joint portion 202 of the support portion 20 and the axial abutment with the bottom portion 101 of the housing 10 respectively, the mutual positioning between the detection portion 40 and the support portion 20 and the housing 10 respectively can be achieved. Thus, the housing 10, the support portion 20, the limiting portion 30 and the detection portion 40 of the sensor are fixedly connected to each other to form a hollow structure of the sensor. In this way, the stability between the components can be achieved without resin filling, improving the detection characteristics of the sensor. And through the structure of such a sensor, the assembly man-hours of the sensor can be reduced, and the investment cost can be saved.

[0040] In the embodiment of the present application, the cylindrical shape of the housing 10 can be, for example, Figure 1 shown as a cylindrical shape, but the present application is not limited thereto. For example, it can also be a square tube shape with a rectangular cross-section or a tube shape with other cross-sectional shapes.

[0041] In the embodiment of the present application, as Figure 3 and Figure 4 shown, the radially outer peripheral surface F1 of the joint portion 202 of the support portion 20 can directly abut against the radially inner peripheral surface F2 of the housing 10 in the radial direction. However, the present application is not limited thereto. For example, there can also be a clearance fit between the radially outer peripheral surface F1 of the joint portion 202 and the radially inner peripheral surface F2 of the housing 10, and a sealing gasket is provided between them. There can also be an interference fit between the radially outer peripheral surface F1 of the joint portion 202 and the radially inner peripheral surface F2 of the housing 10. In this way, the radially outer peripheral surface F1 of the joint portion 202 and the radially inner peripheral surface F2 of the housing 10 are abutted together through the sealing gasket, further realizing the radial positioning between the support portion 20 and the housing 10.

[0042] In the embodiment of the present application, the limiting portion 30 and the housing 10 can be integrally formed (not shown). In this case, the limiting portion 30 is formed as a rabbet portion extending radially inward from the inner peripheral surface of the housing 10. Such a structure can be used for any sensor that does not include electrodes, such as a capacitive proximity sensor. That is to say, through the axial abutment of the limiting portion 30 integrally formed with the housing 10 with the abutting portion 203 of the support portion 20, the displacement of the support portion 20 toward the other end in the axial direction can be restricted, thereby further realizing the axial positioning between the support portion 20 and the housing 10.

[0043] In the embodiment of the present application, it is not limited to the integral formation of the limiting portion 30 and the housing 10 as shown in the figure. As Figures 4 to 6As shown, the limiting part 30 can be integrally formed with the housing 10 separately. In this case, for example, for a capacitive proximity sensor, the limiting part 30 can be the electrode of the sensor 1. Further, it can be a shielding electrode.

[0044] For example, the sensor 1 can be a capacitive proximity sensor. Among them, the shielding electrode of the proximity sensor can function as the limiting part 30, and the shielding electrode (limiting part 30) is electrically connected to other components of the substrate assembly; that is to say, through the axial abutment of the joint 202 between the end of the substrate assembly (detection part 40) close to the cover part 201 and the support part 20, the displacement of the substrate assembly in the axial direction towards one axial end can be restricted. Then, through the axial abutment of the shielding electrode (limiting part 30) and the abutting part 203, the displacement of the substrate assembly in the axial direction towards one axial end can be further restricted. Moreover, through the axial abutment of the other end of the substrate assembly (detection part 40) far from the cover part 201 and the bottom 101 of the housing 10, the displacement of the substrate assembly in the axial direction towards the other axial end can be restricted, thereby realizing the axial positioning of the substrate assembly.

[0045] In the embodiment of the present application, when the limiting part 30 is integrally formed with the housing 10 separately, it is not limited that the limiting part 30 is a shielding electrode. For example, for other types of sensors, the limiting part 30 can be neither a shielding electrode nor an electrode, and the limiting part 30 can be fixedly connected to the housing 10 in any way.

[0046] Figure 7 is the sectional view taken along Figure 2 the line C-C' in the figure, showing the view of the support part and the detection part after removing the housing.

[0047] In the embodiment of the present application, the joint 202 extending from the cover part 201 to the other end part (the other axial end) of the housing 10 can be formed into any shape having an accommodation space for accommodating at least a part of the detection part 40 inside. For example, the joint 202 is a cylindrical shape extending from the cover part 201; or, as Figures 4 to 7 shown, the joint 202 includes a first main body part 2021 extending axially from the cover part 201 to the other end (the other axial end) of the housing 10 and a first arm part 2022 and a second arm part 2023 extending from the first main body part 2021 to the other end (the other axial end) of the housing 10 and alternately arranged in the circumferential direction. That is to say, the first arm part 2022 and the second arm part 2023 are combined into a generally cylindrical shape. However, since it is not a complete cylindrical shape, in this way, when assembling the housing 10 and the support part 20, it is convenient to insert the joint 202 of the support part 20 into the inside of the housing 10, and it is beneficial to the light weight of the whole sensor.

[0048] In the embodiment of the present application, as Figure 7 shown, the first arm portion 2022 and the second arm portion 2023 are alternately arranged at unequal intervals in the circumferential direction. However, the present application is not limited thereto, and the first arm portion 2022 and the second arm portion 2023 may also be alternately arranged at equal intervals in the circumferential direction.

[0049] In the embodiment of the present application, as Figure 4 , Figure 6 and Figure 7 shown, the number of the first arm portions 2022 is two, and the two first arm portions 2022 are opposed to each other in the radial direction. The abutting portion 203 is provided at the overhanging end portion E1 of the first arm portion 2022. The number of the second arm portions 2023 is also two, and the two second arm portions 2023 are opposed to each other in the radial direction.

[0050] In the embodiment of the present application, the number of the first arm portions 2022 and the second arm portions 2023 is not limited to two as shown in the figure, and the number thereof may be set to two or more according to the diameter of the sensor.

[0051] In the embodiment of the present application, as Figure 7 shown, the second arm portion 2023 is formed with a guide groove G1. The guide groove G1 has a wall portion W extending radially inward from the inner wall 20231 of the second arm portion 2023. The detection portion 40 abuts against the wall portion W in the circumferential direction and abuts against the inner wall 20231 of the second arm portion 2023 in the radial direction.

[0052] Thus, through the second arm portion 2023 formed with the guide groove G1, it is beneficial to insert the detection portion 40 into the inside of the support portion 20. And through the abutting of the detection portion 40 against the wall portion W of the second arm portion 2023 and the abutting against the inner wall 20231 of the second arm portion 2023 respectively, the positioning of the detection portion 40 in the circumferential direction and the radial direction can be further realized, so that the hollow structure of the sensor is more stable.

[0053] In the embodiment of the present application, the present application is not limited to the detection portion 40 abutting against the wall portion W in the circumferential direction and abutting against the inner wall 20231 in the radial direction. For example, the detection portion 40 may also have a clearance fit with the wall portion W in the circumferential direction, and the detection portion 40 also has a clearance fit with the inner wall 20231 of the second arm portion 2023 in the radial direction.

[0054] In the embodiment of the present application, as Figure 4 and Figure 6 shown, the lengths of the first arm portion 2022 and the second arm portion 2023 in the axial direction are different. The length of the first arm portion 2022 in the axial direction is greater than the length of the second arm portion 2023 in the axial direction. In this way, the abutting with the limiting portion 30 in the axial direction can be satisfied through the length of the first arm portion 2022, and the insertion of the detection portion 40 can be facilitated through the shorter second arm portion 2023.

[0055] In an embodiment of the present application, as Figures 4 to 6 shown, the abutting portion 203 is a ring structure, which is made of a resin with elastic deformation. Among them, the abutting portion 203 can be integrally formed with the first arm portion 2022, or they can be separately formed. The abutting portion 203 and the first arm portion 2022 can be made of the same material or different materials.

[0056] In an embodiment of the present application, in the case where the limiting portion 30 and the housing 10 are separately formed as described above, for example, for a capacitive proximity sensor, the limiting portion 30 is an electrode of the capacitive proximity sensor. Further, it can be a shielding electrode. Then, as Figures 4 to 6 shown, the ring-shaped abutting portion 203 can axially abut against the shielding electrode (limiting portion 30) of the detection portion 40.

[0057] Figure 8 is a schematic diagram of the supporting portion in an embodiment of the present application; Figure 9 is Figure 8 an enlarged view of the dashed box T of

[0058] As Figure 8 and Figure 9 shown, at the place where the ring-shaped abutting portion 203 abuts against the limiting portion 30 (see Figure 4 ), the abutting portion 203 is provided with a boss 2031 protruding towards the other end in the axial direction. The surface of the boss 2031 facing the other end in the axial direction is a plane. By abutting the boss 2031 of the abutting portion 203 against the limiting portion 30, a surface contact between the abutting portion 203 and the limiting portion 30 is formed, avoiding point contact between the abutting portion 203 and the limiting portion 30, thereby enhancing the structural stability between the two and improving the vibration resistance characteristics of the detection portion 40 integrated with the limiting portion 30.

[0059] In this embodiment, in a state where the shielding electrode (limiting portion 30) and the abutting portion 203 are not in contact, the sum of the lengths of the first main body portion 2021, the first arm portion 2022, and the abutting portion 203 in the axial direction and the axial length from the shielding electrode (limiting portion 30) to the other end of the detection portion 40 away from the cover portion 201 is greater than the axial length of the housing 10.

[0060] That is to say, since the abutting portion 203 is a component with elastic deformation, before the substrate assembly (detection portion 40), the support portion 20, and the housing 10 of the capacitive proximity sensor are assembled, the sum of the axial lengths of the first main body portion 2021, the first arm portion 2022, and the abutting portion 203 and the axial length from the shielding electrode (limiting portion 30) to the other end of the detection portion 40 away from the cover portion 201 is greater than the axial length of the housing 10. When the three are assembled to form a complete sensor, due to the elastic deformation of the abutting portion 203, the sum of the axial lengths of the first main body portion 2021, the first arm portion 2022, and the abutting portion 203 and the axial length from the shielding electrode (limiting portion 30) to the other end of the detection portion 40 away from the cover portion 201 is equal to the axial length of the housing 10.

[0061] Thus, a flexible connection is formed between the detection portion 40 of the sensor and the housing 10 through the support portion 20, ensuring a tight and stable fit between the detection portion 40 and the housing 10.

[0062] In the embodiment of the present application, as Figures 2 to 4 shown, the housing 10 may include a clamping portion 102, and the support portion 20 may further include a engaging portion 204. The support portion 20 is engaged and connected to the housing 10 through the engagement between the engaging portion 204 and the clamping portion 102. The engaging portion 204 is disposed on the cover portion 201 and is located radially outside the joint portion 202. The engaging portion 204 extends axially from the cover portion 201 towards the other end of the housing 10.

[0063] Thus, a fixed connection between the support portion 20 and the housing 10 is achieved through the clamping portion 102 and the engaging portion 204.

[0064] As Figure 3 、 Figure 4 and Figure 6 shown, the engaging portion 204 includes a second main body portion 2041 extending axially from the cover portion 201 towards the other end of the housing 10 and a buckle portion 2042 protruding radially outward from the second main body portion 2041. Among them, the buckle portion 2042 abuts against the clamping portion 102 axially, and the radially outer peripheral surface F3 of the second main body portion 2041 abuts against the radially inner peripheral surface F2 of the housing 10 radially.

[0065] That is to say, the radially outer peripheral surface F3 of the second main body portion 2041 has a shape similar to the radially inner peripheral surface F2 of the housing 10 so that the radially outer peripheral surface F3 of the second main body portion 2041 fits with the radially inner peripheral surface F2 of the housing 10. For example, if the radially inner peripheral surface F2 of the housing 10 is also an arc surface, then the radially outer peripheral surface F3 of the second main body portion 2041 is also an arc surface.

[0066] Thus, the mutual positioning of the support portion 20 and the outer shell 10 in the axial, radial, and circumferential directions is further achieved, thereby realizing a stable fit between the two.

[0067] In the embodiment of the present application, as Figure 3 and Figure 4 shown, the number of engaging portions 204 is two. Correspondingly, the number of engaging portions 102 of the outer shell 10 is the same as the number of engaging portions 204. However, the present application is not limited thereto, and the number of engaging portions 204 can be two or more. For example, the number of engaging portions 204 can be set according to the diameter of the sensor.

[0068] In the embodiment of the present application, one end of the detection portion 40 close to the cover portion 201 can be directly abutted against the engaging portion 202 in the axial direction, but the present application is not limited thereto. For example, due to factors such as machining errors and / or assembly errors, one end of the detection portion 40 close to the cover portion 201 may not be directly abutted against the engaging portion 202 in the axial direction. In this case, in order to make the fit between the detection portion 40 and the support portion 20 more stable, as Figure 3 and Figure 6 shown, a buffer portion 50 is provided between the abutting surface of one end of the detection portion 40 close to the cover portion 201 and the engaging portion 202, that is, the detection portion 40 is axially abutted against the engaging portion 202 through the buffer portion 50. Thus, the positioning of the detection portion 40 and the support portion 20 in the axial direction is further stabilized.

[0069] In the embodiment of the present application, as Figure 3 and Figure 7 shown, the number of buffer portions 50 is two, but the present application is not limited thereto, and the number of buffer portions 50 can be the same as the number of guide grooves G1.

[0070] Figure 10 is a schematic diagram of the buffer portion in the embodiment of the present application. As Figure 7 and 10 shown, the buffer portion 50 is engaged with the wall portion W of the guide groove G1. Thus, the buffer portion 50 can be fixedly engaged on the guide groove G1, facilitating the axial abutment of the buffer portion 50 and the detection portion 40.

[0071] In the embodiment of the present application, the buffer portion 50 can be formed into any structure capable of engaging with the wall portion W. For example, as Figure 10 shown, the buffer portion 50 can be formed into a dovetail groove structure. The buffer portion 50 can include, for example, an abutting contact portion 501 and a locking and fixing portion 502 extending from the abutting contact portion 501. The abutting contact portion 501 is axially abutted against the detection portion 40, and a groove G2 is formed between the locking and fixing portion 502 and the abutting contact portion 501. The wall portion W is fitted into the groove G2, thus realizing the locking and fixing of the buffer portion 50 and the guide groove G1.

[0072] In the embodiment of the present application, the buffer portion 50 may be made of a resin material with elastic deformation.

[0073] Only the components related to the sensor 1 in the embodiment of the present application are described above. The present application is not limited thereto. The sensor 1 may further include other conventional components. For details, reference may be made to the related art, and the description is omitted here.

[0074] According to this embodiment, by fixedly connecting the housing 10, the support portion 20, the limiting portion 30, and the detection portion 40 to each other, a hollow structure of the sensor is formed, and the stability between the components can be achieved without resin filling, thereby improving the detection characteristics of the sensor; and through the structure of such a sensor, the assembly man-hours can be reduced.

[0075] The present application has been described in conjunction with specific embodiments above. However, those skilled in the art should understand that these descriptions are exemplary and not a limitation on the protection scope of the present application. Those skilled in the art can make various modifications and changes to the present application according to the spirit and principle of the present application, and these modifications and changes are also within the scope of the present application.

[0076] The preferred embodiments of the present application have been described above with reference to the drawings. Many features and advantages of these embodiments are clear from this detailed description. Therefore, the appended claims are intended to cover all such features and advantages that fall within the true spirit and scope of these embodiments. In addition, since many modifications and changes are readily conceivable by those skilled in the art, the embodiments of the present application are not to be limited to the exact structures and operations illustrated and described, but may cover all suitable modifications and equivalents that fall within their scope.

Claims

1. A sensor, characterized in that, The sensor includes: a cylindrical outer shell having a bottom; a support portion fixedly connected to the outer shell. The support portion includes a cover portion provided at one end of the outer shell, a joint portion extending from the cover portion toward the other end of the outer shell, and an abutting portion provided at one end of the joint portion away from the cover portion. The joint portion and the abutting portion are provided inside the outer shell; a limiting portion provided at the other end of the outer shell and axially abutting against the abutting portion; and a detection portion, at least a part of which is located radially inside the joint portion. One end of the detection portion close to the cover portion axially abuts against the joint portion, and the other end of the detection portion away from the cover portion axially abuts against the bottom of the outer shell.

2. The sensor according to claim 1, characterized in that, The limiting portion is integrally formed with the outer shell and is formed as a rabbet portion extending radially inward from the inner peripheral surface of the outer shell; or The limiting portion is separately formed from the outer shell.

3. The sensor according to claim 2, wherein The joint portion includes a first main body portion extending axially from the cover portion toward the other end of the outer shell, and first arm portions and second arm portions extending from the first main body portion toward the other end of the outer shell and alternately arranged in the circumferential direction. The number of the first arm portions is at least two, and the two first arm portions are opposed to each other in the radial direction. The abutting portion is provided at the overhanging end of the first arm portion. The number of the second arm portions is at least two, and the two second arm portions are opposed to each other in the radial direction.

4. The sensor according to claim 3, characterized in that, A guide groove is formed in the second arm portion, and the guide groove has a wall portion extending radially inward from the inner wall of the second arm portion.

5. The sensor according to claim 4, wherein, The detection portion axially abuts against the wall portion in the circumferential direction and radially abuts against the inner wall.

6. The sensor according to claim 3, characterized in that The abutting portion is a ring structure and is made of a resin having elastic deformation. The abutting portion is integrally or separately formed with the first arm portion.

7. The sensor according to claim 6, characterized in that, When the limiting portion is separately formed from the outer shell, the limiting portion is an electrode of the sensor or the limiting portion is fixedly connected to the outer shell.

8. The sensor according to claim 1, characterized in that The outer shell includes a clamping portion. The support portion further includes a engaging portion. The support portion is engaged and connected to the outer shell through the engagement of the engaging portion and the clamping portion. The engaging portion is provided on the cover portion and is located radially outside the joint portion. The engaging portion extends axially from the cover portion toward the other end of the outer shell. The engaging portion includes a second main body portion extending axially from the cover portion toward the other end of the outer shell and a buckle portion protruding radially outward from the second main body portion. The buckle portion axially abuts against the clamping portion. The radially outer peripheral surface of the second main body portion radially abuts against the inner peripheral surface of the outer shell.

9. The sensor according to claim 5, characterized in that, The sensor further includes: a buffer portion provided between one end of the detection portion close to the cover portion and the joint portion and axially abutting against the detection portion. The detection portion axially abuts against the joint portion through the buffer portion.

10. The sensor according to claim 9, characterized in that, The number of the buffer portions is the same as the number of the guide grooves, and the buffer portions are engaged with the wall portions of the guide grooves.

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