Mounting ring and position sensor including the same

Abstract

The utility model relates to a mounting ring (100) which is used for rotatably mounting a rotating part (300) of a position sensor (1000) on a sensor body part (200), and a position sensor comprising the mounting ring. The position sensor is used for detecting the rotating angle and position of the rotating shaft. The mounting ring comprises a metal ring piece (1) and a plastic ring piece (2) formed on the metal ring piece in an overmolding mode, the mounting ring comprises an axial through hole (101) penetrating through the metal ring piece and the plastic ring piece and used for containing a rotating shaft, and the plastic ring piece (2) comprises a plastic ring piece body part and at least two mounting feet (24) extending out of the plastic ring piece body part in the axial direction. The mounting foot is used for being fixed to a rotating piece. Through the integrated coating molding of the metal ring piece and the plastic ring piece, the part processing cost is reduced, the internal quality control cost is reduced, the corrosion resistance and cleanliness requirements of the product are ensured, and meanwhile, the strength requirement of the mounting ring can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, and in particular to the technical field of position sensors for detecting the rotation angle and position of a rotating shaft. More specifically, the utility model relates to a mounting ring for rotatably mounting a rotating member of a position sensor to a sensor body, and a position sensor comprising the mounting ring. Background Art

[0002] In one technical solution of the prior art, a position sensor for detecting the rotation angle and position of a rotating shaft comprises a main body and a rotating member rotatably mounted relative to the main body, the rotating member can rotate with the rotating shaft, a detection member and a printed circuit board are arranged in the main body, the detection member can detect the rotation angle and position of the rotating member and generate a signal, so that the position sensor can detect the rotation angle and position of the rotating shaft. A typical example of this technical solution is a position sensor for detecting the rotation angle and position of a shift shaft in a motor vehicle.

[0003] In one technical solution of the prior art, the installation between the rotating part and the main body of the position sensor is achieved by means of a metal powder metallurgy crimping ring, and the crimping legs of the crimping ring sequentially pass through the openings in the main body and the openings in the rotating part and are crimped onto the rotating part, thereby installing the rotating part to the main body. This technical solution has the following disadvantages:

[0004] 1. The crimping ring is formed by metal powder metallurgy technology and machining, and the processing cost is relatively high;

[0005] 2. Due to the poor ductility of metal powder metallurgy materials, cracks may occur in the crimping ring during the crimping process, which will increase quality control costs and affect production cycles;

[0006] 3. During the crimping process, metal deformation may cause the coating on the surface of the crimping ring to peel or crack, thereby affecting the corrosion resistance of the coating, or may even cause the coating to fall off, thus affecting the cleanliness.

[0007] Therefore, there is a need for an improved mounting structure for mounting a rotating member of a position sensor to a body portion. Utility Model Content

[0008] The utility model aims to solve at least one of the above problems existing in the prior art.

[0009] To this end, the utility model proposes a mounting ring for rotatably mounting a rotating part of a position sensor to a sensor body, wherein the position sensor is used to detect the rotation angle and position of a rotating shaft, wherein the mounting ring includes a metal ring and a plastic ring overmolded to the metal ring, wherein the mounting ring includes an axial through hole penetrating the metal ring and the plastic ring for receiving the rotating shaft, wherein the plastic ring includes a plastic ring body and at least two mounting feet extending axially from the plastic ring body, wherein the mounting feet are used to be fixed to the rotating part. Through the integral overmolding of the metal ring and the plastic ring, the cost of parts processing is reduced, the cost of internal quality control is reduced, the product's anti-corrosion performance and cleanliness requirements are guaranteed, and the strength requirements of the mounting ring can be met at the same time.

[0010] In a preferred embodiment, the metal ring comprises a first central through hole, the first central through hole is configured to receive the rotating shaft and is in shape matching with the rotating shaft, the plastic ring comprises a second central through hole extending coaxially with the first central through hole to allow the rotating shaft to pass through the mounting ring, the first central through hole and the second central through hole form the axial through hole. The rotating shaft is received in the metal ring, thereby ensuring the wear resistance and strength of the mounting ring.

[0011] In a preferred embodiment, the metal ring also includes a plurality of overmolding holes, which are used to allow the material used to form the plastic ring to flow into the overmolding holes during overmolding. This can enhance the bonding between the metal ring and the plastic ring and improve the overall strength of the mounting ring.

[0012] In a preferred embodiment, the plastic ring body includes a first ring portion, a second ring portion and a third ring portion which are connected in sequence, the outer diameter of the second ring portion is larger than the outer diameters of the first ring portion and the third ring portion, the metal ring is embedded between the second ring portion and the third ring portion, and the mounting foot extends from the free end surface of the third ring portion.

[0013] In a preferred embodiment, the outer diameter of the metal ring is the same as the outer diameter of the second annular portion. The metal ring is fully combined with the plastic ring to improve the overall strength of the mounting ring.

[0014] In a preferred embodiment, a recess for receiving a clamp is provided on the free end surface of the first annular portion, the recess being a through recess along the diameter direction of the first annular portion (21). The recess allows the clamp to be inserted therein, and the clamp can drive the mounting ring and thereby drive the rotating member to rotate, so as to perform accuracy inspection on the position sensor.

[0015] In a preferred embodiment, the mounting ring comprises two mounting feet, which are cylindrical and can be heat-riveted to the rotating member.

[0016] In a preferred embodiment, the mounting ring includes three mounting feet, each of which is in the form of a claw, and the claw includes a clamping portion extending axially from the main body of the plastic ring and a radial lug extending radially outward from the free end of the clamping portion along the mounting ring. The clamping portion is used to clamp and cooperate with the corresponding clamping recess on the wall of the hole through which the rotating shaft of the rotating member passes, and the radial lug forms an axial stop for the rotating member.

[0017] In a preferred embodiment, a protrusion is provided on the surface of the clamping portion that is clamped with the clamping recess, and the protrusion is used to increase friction so as to more firmly fix the rotating member to the mounting ring.

[0018] The utility model also proposes a position sensor, which includes a sensor body and a rotating part rotatably installed relative to the sensor body, the sensor body includes a detection part, and the detection part detects the rotation angle and position of the rotating part, wherein the position sensor also includes the above-mentioned mounting ring, the mounting ring is accommodated in the accommodating seat of the sensor body and can rotate relative to the accommodating seat, and the mounting foot passes through the opening in the accommodating seat and is fixed to the rotating part so as to rotatably install the rotating part to the sensor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is described in detail below by way of non-limiting embodiments with reference to the accompanying drawings, in which:

[0020] Figure 1 is an exploded perspective view of a position sensor according to a first embodiment of the utility model, the position sensor comprising a rotating member, a sensor body and a mounting ring according to the first embodiment of the utility model;

[0021] Figure 2 yes Figure 1 An exploded perspective view of the position sensor shown as viewed from another direction;

[0022] Figure 3 yes Figure 1 A perspective view of the position sensor shown;

[0023] Figure 4 is an exploded perspective view of a mounting ring according to a first embodiment of the utility model;

[0024] Figure 5 yes Figure 4 A perspective view of the mounting ring shown;

[0025] Figure 6 yes Figure 4 a perspective view of the mounting ring shown as viewed from another direction;

[0026] Figure 7 is an exploded perspective view of a position sensor according to a second embodiment of the present utility model, the position sensor comprising a rotating member, a sensor body and a mounting ring according to the second embodiment of the present utility model;

[0027] Figure 8 yes Figure 7 An exploded perspective view of the position sensor shown as viewed from another direction;

[0028] Fig. 9 yes Figure 7 A perspective view of the position sensor shown;

[0029] Fig.10 is an exploded perspective view of a mounting ring according to a second embodiment of the utility model;

[0030] Fig.11 yes Fig.10 A perspective view of the mounting ring shown;

[0031] Fig.12 yes Fig.10 A perspective view of the mounting ring is shown as viewed from another direction.

[0032] The drawings are schematic only and are not necessarily drawn to scale. They only show those parts necessary to illustrate the utility model, while other parts may be omitted or only briefly mentioned. In addition to the parts or parts shown in the drawings, the utility model may also include other parts or parts. DETAILED DESCRIPTION

[0033] In the following description, many specific details are set forth so that those skilled in the art can more fully understand the present invention. However, it is obvious to those skilled in the art that the present invention may be implemented without some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the following features and elements may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless explicitly stated in the claims.

[0034] In this document, the terms “first”, “second”, and “third” are used to describe components or parts, and these terms are only used to distinguish each component or part, and are not used to limit the order or number of these components or parts.

[0035] Figures 1 to 3 The position sensor 1000 according to the first embodiment of the present invention is shown. The position sensor 1000 includes a rotating member 300, a sensor body 200 and a mounting ring 100 according to the first embodiment of the present invention, and the mounting ring 100 is used to rotatably mount the rotating member 300 to the sensor body 200. The position sensor 1000 is used to detect the rotation angle and position of a rotating shaft (not shown). The rotating shaft is, for example, a shift shaft in a motor vehicle, but is not limited thereto.

[0036] like Figures 1 to 3 As shown, the rotating member 300 includes a detected portion 301 and a mounting portion 302, and a rivet hole 303 and a rotation axis through hole 304 are provided in the mounting portion 302. The sensor body 200 includes a receiving seat 201 with an opening 202. The mounting ring 100 is received in the receiving seat 201 and can rotate relative to the receiving seat 201. The mounting foot 24 of the mounting ring 100 passes through the opening 202 of the receiving seat 201 and the rivet hole 303 of the rotating member 300 and is hot-riveted to the mounting portion 302 of the rotating member 300, so that the rotating member 300 is rotatably mounted to the sensor body 200.

[0037] The rotating shaft passes through the rotating shaft through hole 304 of the rotating member 300 and the axial through hole 101 of the mounting ring 100 and is fixed to the mounting ring 100, so that the mounting ring 100 can rotate together with the rotating shaft. Since the rotating member 300 is fixed to the mounting ring 100 by heat riveting, the rotating member 300 can also rotate together with the rotating shaft. The sensor body 200 includes a detection member. When the rotating shaft rotates, the rotating member 300 rotates together with the rotating shaft, and the detection member detects the rotation angle and position of the detected part 301 of the rotating member 300 and generates a signal, so the position sensor 1000 can detect the rotation angle and position of the rotating shaft.

[0038] like Figures 4 to 6 As shown, the mounting ring 100 according to the first embodiment of the present invention comprises a metal ring 1 and a plastic ring 2 overmolded onto the metal ring 1. The metal ring 1 comprises a first central through hole 10 for receiving a rotating shaft and matching the shape of the rotating shaft, and the plastic ring 2 comprises a second central through hole 20 extending coaxially with the first central through hole 10 of the metal ring 1 to allow the rotating shaft to pass through, and the first central through hole 10 and the second central through hole 20 thus form the above-mentioned axial through hole 101 for receiving the rotating shaft that passes through the metal ring 1 and the plastic ring 2.

[0039] The plastic ring 2 includes a plastic ring body and two mounting feet 24 extending axially from the plastic ring body. The mounting feet 24 are used to pass through the rivet holes 303 of the rotating member 300 and be hot-riveted to the rotating member 300. It is understood that more mounting feet 24 may also be provided.

[0040] Through the integrated overmolding of the metal ring 1 and the plastic ring 2, the parts processing cost is reduced, the internal quality control cost is reduced, the product corrosion resistance and cleanliness requirements are ensured, and the strength requirements of the mounting ring can be met.

[0041] More specifically, if Figure 4 As shown, the first central through hole 10 is in the form of a substantially rectangular hole, having two opposite straight side walls and a pair of opposite arc-shaped side walls connected to the two straight side walls, and the shape matches the shape of the rotating shaft, so that the rotating shaft can drive the mounting ring 100 to rotate together. Figure 1 As shown, the rotation axis through hole 304 of the rotating member 300 is in the form of a substantially rectangular hole substantially the same as the first central through hole 10, as shown in FIG. Figure 4 As shown, the second central through hole 20 of the plastic ring 2 is also in the form of a substantially rectangular hole substantially the same as the first central through hole 10. It should be understood that the rotation shaft through hole 304 and the second central through hole 20 can have any suitable shape suitable for the rotation shaft to pass through.

[0042] The metal ring 1 further includes four overmolding holes 11, which are respectively located at positions corresponding to the middle of the straight side wall and the arc-shaped side wall in the diameter direction of the metal ring 1; during overmolding, the material used to form the plastic ring 2 can flow into the overmolding holes 11, thereby enhancing the bonding between the metal ring 1 and the plastic ring 2 and improving the overall strength of the mounting ring 100. It should be understood that the number of overmolding holes 11 can be less or more and their positions can also be appropriately selected according to requirements.

[0043] like Figures 4 to 6 As shown, the main body of the plastic ring 2 includes a first annular portion 21, a second annular portion 22 and a third annular portion 23 connected in sequence, and the outer diameter of the second annular portion 22 is larger than the outer diameters of the first annular portion 21 and the third annular portion 23; the metal ring 1 is embedded between the second annular portion 22 and the third annular portion 23, and its outer diameter is the same as the outer diameter of the second annular portion 22, so that the metal ring 1 and the plastic ring 2 are firmly combined; two cylindrical mounting feet 24 extend from the free end surface of the third annular portion 23. It should be understood that the mounting feet 24 can also have any suitable cylindrical shape, and the number of mounting feet 24 can also be greater.

[0044] During operation of the position sensor 1000 , the metal ring 1 of the mounting ring 100 sits on the metal component of the accommodating seat 201 of the sensor body 200 , and the rotating shaft fits in the first central through hole 10 of the metal ring 1 , so that the metal ring 1 ensures the wear resistance and strength of the mounting ring 100 .

[0045] like Figure 4 and Figure 5As shown, a recess 29 for receiving a fixture is provided on the free end surface of the first annular portion 21 of the plastic ring 2, and the recess 29 is in the form of a through recess along the diameter direction of the first annular portion 21. It should be understood that the recess 29 can have any suitable shape suitable for receiving a fixture. During the accuracy inspection of the sensor, the fixture can be inserted into the recess 29 and drive the mounting ring 100 and thereby drive the rotating member 300 to rotate, so as to perform the accuracy inspection.

[0046] Figures 7 to 9 The position sensor 1000 according to the second embodiment of the present invention is shown, which includes the mounting ring 100 according to the second embodiment of the present invention. The difference between the position sensor 1000 of the first embodiment and the second embodiment is only the structure of the mounting portion 302 of the rotating member 300 and the structure of the mounting foot 24 of the mounting ring 100 fixed thereto. These differences are described in detail below, and other parts are not repeated here.

[0047] like Figures 7 to 9 As shown, the mounting portion 302 of the rotating member 300 is generally annular, including a generally circular rotation shaft through hole 304 and three engaging recesses 303' located on the hole wall of the rotation shaft through hole 304, and the engaging recesses 303' are axially penetrated. It should be understood that the rotation shaft through hole 304 can have any suitable shape suitable for the rotation shaft to pass through, and the number of the engaging recesses 303' can be more or less.

[0048] like Figures 10 to 12 As shown, the mounting ring 100 accordingly includes three mounting feet 24, which are in the form of claws, and the claws include a clamping portion 25 extending axially from the free end surface of the third annular portion 23 of the plastic ring 2, and include a radial lug 26 extending radially outward from the free end of the clamping portion 25 along the mounting ring 100. Figures 7 to 9 As shown, when the rotating member 300 is installed to the sensor body 200 with the aid of the mounting ring 100, the mounting foot 24 is inserted into the rotating shaft through hole 304, and its snap-fitting portion 25 is snap-fitted with the corresponding snap-fitting recess 303′ of the rotating member 300, and the radial lug 26 passes through the rotating shaft through hole 304 and forms an axial stop for the rotating member 300.

[0049] Advantageously, a protrusion may be provided on the surface of the clamping portion 25 that is clamped with the clamping recess 303' to increase the friction force, thereby more firmly fixing the rotating member 300 to the mounting ring 100. Fig.11 As shown, the clamping portion 25 is in the form of an arc segment, and a first protrusion 27 and a second protrusion 28 are respectively provided on the side wall and the outer peripheral wall of the clamping portion 25 .

[0050] Although the utility model is disclosed as above with preferred embodiments, the utility model is not limited thereto. Any changes and modifications made by any person skilled in the art without departing from the spirit and scope of the utility model should be included in the protection scope of the utility model, so the protection scope of the utility model should be based on the scope defined in the claims.

Claims

1. A mounting ring (100), the mounting ring (100) being used to rotatably mount a rotating member (300) of a position sensor (1000) to a sensor body (200), the position sensor (1000) being used to detect a rotation angle and a position of a rotating shaft, characterized in that: The mounting ring (100) comprises a metal ring (1) and a plastic ring (2) overmolded onto the metal ring (1); the mounting ring (100) comprises an axial through hole (101) penetrating the metal ring (1) and the plastic ring (2) for receiving the rotating shaft; the plastic ring (2) comprises a plastic ring body and at least two mounting feet (24) extending axially from the plastic ring body; the mounting feet (24) are used to be fixed to the rotating member (300).

2. The mounting ring (100) according to claim 1, characterized in that: The metal ring (1) comprises a first central through hole (10), wherein the first central through hole (10) is configured to receive the rotating shaft and to match the shape of the rotating shaft, and the plastic ring (2) comprises a second central through hole (20) extending coaxially with the first central through hole (10) to allow the rotating shaft to pass through the mounting ring (100), and the first central through hole (10) and the second central through hole (20) form the axial through hole (101).

3. The mounting ring (100) according to claim 2, characterized in that: The metal ring (1) further comprises a plurality of overmolding holes (11) for allowing the material for forming the plastic ring (2) to flow into the overmolding holes (11) during overmolding.

4. The mounting ring (100) according to claim 2, characterized in that: The main body of the plastic ring part comprises a first ring part (21), a second ring part (22) and a third ring part (23) which are connected in sequence, the outer diameter of the second ring part (22) is larger than the outer diameters of the first ring part (21) and the third ring part (23), the metal ring part (1) is embedded between the second ring part (22) and the third ring part (23), and the mounting foot (24) extends from the free end surface of the third ring part (23).

5. The mounting ring (100) according to claim 4, characterized in that: The outer diameter of the metal ring (1) is the same as the outer diameter of the second annular portion (22).

6. The mounting ring (100) according to claim 4, characterized in that: A recess (29) for receiving a clamp is provided on the free end surface of the first annular portion (21), and the recess (29) is a through recess along the diameter direction of the first annular portion (21).

7. The mounting ring (100) according to any one of claims 1 to 6, characterized in that: The mounting ring (100) includes two mounting feet (24), which are cylindrical and can be heat-riveted to the rotating member (300).

8. The mounting ring (100) according to any one of claims 1 to 6, characterized in that: The mounting ring (100) comprises three mounting feet (24), wherein the mounting feet (24) are in the form of claws, and the claws comprise a clamping portion (25) extending axially from the main body of the plastic ring and a radial lug (26) extending radially outward from the free end of the clamping portion (25) along the radial direction of the mounting ring (100). The clamping portion (25) is used to be clamped and matched with a corresponding clamping recess (303′) on the wall of the hole (304) through which the rotating shaft of the rotating member (300) passes, and the radial lug (26) forms an axial stop for the rotating member (300).

9. The mounting ring (100) according to claim 8, characterized in that: A protrusion is provided on the surface of the clamping portion (25) that is clamped with the clamping recess (303').

10. A position sensor (1000), comprising a sensor body (200) and a rotating member (300) rotatably mounted relative to the sensor body (200), the sensor body (200) comprising a detection member, the detection member detecting a rotation angle and a position of the rotating member (300), characterized in that: The position sensor (1000) further comprises a mounting ring (100) according to any one of claims 1 to 9, wherein the mounting ring (100) is accommodated in a receiving seat (201) of the sensor body (200) and is rotatable relative to the receiving seat (201), and the mounting foot (24) passes through an opening (202) in the receiving seat (201) and is fixed to the rotating member (300) so as to rotatably mount the rotating member (300) to the sensor body (200).

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