Sensor air gap positioning structure

Abstract

The utility model discloses a sensor air gap positioning structure which comprises a sensor body and a positioning sleeve, the sensor body is provided with an installation head, the installation head is located at the end, close to a target wheel, of the axial direction where the sensor body is located, and the positioning sleeve is arranged on the installation head in a sleeving mode in an interference fit mode. One end, far away from the sensor body, of the positioning sleeve is coaxially provided with an annular contact structure, the outer diameter of the annular contact structure is smaller than that of the positioning sleeve, the sensor body is further fixedly sleeved with a lining, and the lining is provided with a kidney-shaped hole extending in the axial direction of the sensor body; and when the outer end surface of the annular contact structure is in contact with a target wheel, the sensor body is fixed on a hub through the cooperation of a fastening bolt and the waist-shaped hole. According to the sensor air gap positioning structure provided by the invention, the installation and control requirements of the sensor can be reduced, the size control cost is reduced, meanwhile, the purpose of air gap calibration can be achieved, and the use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor equipment technical field especially relates to sensor air gap positioning structure. BACKGROUND

[0002] In the wheel speed sensor, the sensor is installed on the wheel hub through the bushing, and the head sensing surface of the sensor and the air gap of the target wheel are fixed.

[0003] The air gap fixed mode has high installation requirements for the sensor, the size between the cylinder body and the target wheel is required to be controlled strictly, and the structure size tolerance of the product is also required to be controlled strictly, which increases the control cost. In addition, there is also a mode of adding a gasket to the head of the sensor to reduce the installation requirements, but the working environment of the wheel speed sensor is generally harsh, including high temperature, high humidity, vibration and various chemical reagents, etc. After long time operation, the gasket is prone to fall off, and the air gap positioning cannot be performed again during the later disassembly and maintenance, so the sensor generally needs to be replaced, and the terminal use cost is high. SUMMARY

[0004] The sensor air gap positioning structure provided by the application can not only reduce the installation control requirements of the sensor and reduce the control cost of the size, but also achieve the purpose of air gap calibration, and the positioning sleeve is not easy to fall off from the sensor, and is more convenient to use.

[0005] The sensor air gap positioning structure provided by the application can not only reduce the installation control requirements of the sensor and reduce the control cost of the size, but also achieve the purpose of air gap calibration, and the positioning sleeve is not easy to fall off from the sensor, and is more convenient to use.

[0006] In a possible implementation manner, the surface of the mounting head is uniformly distributed with a plurality of anti-falling ribs in the circumferential direction, the anti-falling ribs extend in the axial direction of the sensor body, and the positioning sleeve is provided with a limiting space matched with the anti-falling ribs.

[0007] In a possible implementation manner, the anti-falling rib is a triangular strip block, the bottom surface of the triangular strip block is connected to the mounting head, and the limiting space is an annular groove distributed along the inner circle of the positioning sleeve.

[0008] In a possible implementation, the triangular strip block is provided with a bevel structure at each end in the extension direction; in the extension direction of the triangular strip block, the bevel structure is inclined from the inner end to the outer end towards the direction of gradually approaching the mounting head.

[0009] In a possible implementation, the ring-shaped contact structure is composed of one or more triangular cross-section ring strips, the tips of the ring strips being away from the positioning sleeve, and when the ring-shaped contact structure is composed of multiple ring strips, the multiple ring strips are sequentially distributed in the radial direction of the positioning sleeve.

[0010] In a possible implementation, the ring-shaped contact structure is composed of a main body and a contact part, the main body being connected to the positioning sleeve, the contact part being connected to the outer end of the main body, and the contact part being provided with a tip on the side away from the main body.

[0011] In a possible implementation, the contact part includes one or more triangular cross-section ring strips, and when the contact part includes multiple ring strips, the multiple ring strips are sequentially distributed in the radial direction of the positioning sleeve.

[0012] Beneficial effects: Compared with the prior art, the sensor air gap positioning structure provided by the application can prevent the positioning sleeve from falling off the sensor by means of interference fit of the positioning sleeve on the mounting head of the sensor, even in additional environmental conditions. In addition, the outer end of the positioning sleeve is provided with a ring-shaped contact structure, which can lock the sensor on the wheel hub when the ring-shaped contact structure touches the surface of the target wheel. In this way, the positioning sleeve can achieve the purpose of air gap calibration. At the same time, this design can also reduce the size control requirements of the head sensing surface of the sensor, and also reduce the assembly size requirements between the cylinder and the target wheel, thereby reducing the size control cost.

[0013] The cooperation of the anti-falling ribs and the limiting space can further increase the connection strength and structural stability between the positioning sleeve and the sensor, thereby preventing the positioning sleeve from falling off the sensor.

[0014] The design of the triangular ring strips on the ring-shaped contact structure can reduce the rotational resistance of the target wheel, and the remaining part of the ring-shaped contact structure has better structural stability and a long service life after the tips on the ring-shaped contact structure are worn off.

[0015] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the sensor air gap positioning structure of the application is shown.

[0017] Figure 2 A partial exploded view of the sensor air gap positioning structure of the present application is shown.

[0018] Figure 3 A perspective cut view of the positioning sleeve of the present application is shown.

[0019] Figure 4 A cut view of the positioning sleeve of one embodiment of the present application is shown, wherein 4a is a schematic view of the ring contact structure consisting of one ring strip, and 4b is a schematic view of the ring contact structure consisting of multiple ring strips.

[0020] Figure 5 A cut view of the positioning sleeve of another embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] The following description is provided to enable any person skilled in the art to practice the present application. The preferred embodiments described herein are only examples of the present application and the best mode contemplated by the inventors. Therefore, it should be understood that changes can be made in the preferred embodiments described herein without departing from the spirit and scope of the present application. What is described in the specification is considered to be the basic principles of the present application and can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present application.

[0022] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the above terms cannot be understood as a limitation on the present application.

[0023] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0024] Reference Figures 1 to 4The embodiment of the present application provides a sensor air gap positioning structure, which comprises a sensor body 10 and a positioning sleeve 20. The sensor body 10 has a mounting head 11, wherein the mounting head 11 is located at one end of the sensor body 10 close to a target wheel in the axial direction. The positioning sleeve 20 is sleeved on the mounting head 11 in the interference fit mode from the end close to the target wheel, and a ring-shaped contact structure 21 is coaxially arranged at the end of the positioning sleeve 20 away from the sensor body 10, and the outer diameter of the ring-shaped contact structure 21 is smaller than the outer diameter of the positioning sleeve 20. The sensor body 10 is further sleeved with a bushing 12, wherein the bushing 12 is provided with a waist-shaped hole 101 extending in the axial direction of the sensor body 10. When the outer end surface of the ring-shaped contact structure 21 contacts the target wheel, the sensor body 10 is fixed on the wheel hub through the cooperation of the fastening bolt and the waist-shaped hole 101.

[0025] In the process of installing the sensor, first, the positioning sleeve 20 is sleeved on the mounting head 11, then the fastening bolt is pre-tightened, so that the sensor can move in the axial direction based on the space range of the waist-shaped hole 101, then the sensor is moved, the outer end surface of the ring-shaped contact structure 21 contacts the surface of the target wheel, and then the fastening bolt is locked, so that the sensor is fixed on the wheel hub. At this time, the distance between the outer end surface of the mounting head 11 of the sensor and the surface of the target wheel is the fixed air gap, so that the positioning sleeve 20 can achieve the purpose of the target air gap.

[0026] Based on the cooperation of the positioning sleeve 20, the waist-shaped hole 101 and the fastening bolt, the size control requirement of the sensor mounting head 11 is not so strict, and the assembly size requirement between the cylinder body and the target wheel is also not so strict, so that the size control cost can be reduced.

[0027] Since the positioning sleeve 20 is sleeved on the mounting head 11 in the interference fit mode, the positioning sleeve 20 is not easy to fall off from the sensor even in a harsh environment, and the use is more convenient and reliable.

[0028] In order to further increase the structural connection strength between the positioning sleeve 20 and the sensor, and avoid the positioning sleeve 20 from falling off in a harsh environment, a plurality of anti-falling ribs 111 are uniformly distributed on the surface of the mounting head 11 in the circumferential direction, wherein the anti-falling ribs 111 extend in the axial direction of the sensor body 10, and correspondingly, the positioning sleeve 20 is provided with a limiting space 201 matched with the anti-falling ribs 111, so that the contact area and the connection strength between the positioning sleeve 20 and the mounting head 11 can be further increased through the cooperation of the anti-falling ribs 111 and the limiting space 201. The limiting space 201 can be close to the middle part of the positioning sleeve 20.

[0029] In one embodiment, the anti-disengagement rib 111 is a triangular strip, wherein the bottom of the triangular strip is connected to the mounting head 11, and wherein the limiting space 201 is an annular groove distributed along the inner ring of the positioning sleeve 20.

[0030] Further preferably, the triangular strip is provided with a bevel structure 112 at both ends in the extending direction, and the bevel structure 112 is inclined from the inner end to the outer end in the extending direction of the triangular strip, so as to gradually approach the mounting head 11, thereby facilitating the installation of the positioning sleeve 20.

[0031] In one embodiment, the annular contact structure 21 is composed of one (for example Figure 4 a) or a plurality of annular strips 211 with triangular cross-section, wherein the tip of the annular strip 211 is away from the positioning sleeve 20, and when the annular contact structure 21 is composed of a plurality of annular strips 211, the annular strips 211 are distributed in the radial direction of the positioning sleeve 20 in sequence, at intervals, or in direct contact. Figure 4 b. The plurality of annular strips 211 are distributed in sequence, at intervals, or in direct contact in the radial direction of the positioning sleeve 20.

[0032] In another embodiment, in combination with Figure 5 , the annular contact structure 21 is composed of a main body 212 and a contact portion 213, wherein the main body 212 is connected to the positioning sleeve 20, and the contact portion 213 is connected to the outer end of the main body 212, and the contact portion 213 is provided with a tip away from the main body 212.

[0033] Further preferably, the contact portion 213 includes one or a plurality of annular strips 2131 with triangular cross-section, and when the contact portion 213 includes a plurality of annular strips 2131, the annular strips 2131 are distributed in sequence in the radial direction of the positioning sleeve 20.

[0034] In operation, the first rotation of the target wheel will first wear away a part of the tip of the annular strip 211, 2131, and then in the subsequent use, the target wheel will maintain the same interval gap as the positioning sleeve 20, which of course does not affect the fixed air gap size between the sensor and the target wheel, but this can play the role of positioning or target air gap through the positioning sleeve 20. In addition, after the tip is worn away, due to the triangular cross-section of the annular strip 211, 2131, the surface area of the part of the annular contact structure 21 close to the sensor relative to the target wheel will become larger and larger, and therefore the structural strength of the positioning sleeve 20 will also become better and better.

[0035] Those skilled in the art will understand that the embodiments of the present application described above and shown in the drawings are merely by way of example and do not limit the present application. The advantages of the present application have been fully and effectively realized. The functions and structural principles of the present application have been demonstrated and described in the embodiments, and the embodiments of the present application can have any variations or modifications without departing from the principles.

Claims

1. A sensor air gap positioning structure, characterized by, The sensor body has a mounting head at one end close to the target wheel in the axial direction of the sensor body, and the positioning sleeve is sleeved on the mounting head in an interference fit from the end close to the target wheel, and a ring-shaped contact structure is coaxially arranged at the end of the positioning sleeve away from the sensor body, the outer diameter of the ring-shaped contact structure is smaller than the outer diameter of the positioning sleeve, and a bushing is also fixedly sleeved on the sensor body, and a waist-shaped hole extending in the axial direction of the sensor body is formed in the bushing, and the sensor body is fixed on the wheel hub by the cooperation of the fastening bolt and the waist-shaped hole when the outer end surface of the ring-shaped contact structure contacts the target wheel.

2. The sensor air gap positioning structure of claim 1, wherein, The surface of the mounting head is uniformly distributed with a plurality of anti-drop ribs extending in the axial direction of the sensor body, and the positioning sleeve is provided with a limiting space matched with the anti-drop ribs.

3. The sensor air gap positioning structure of claim 2, wherein, The anti-drop rib is a triangular strip block, the bottom surface of the triangular strip block is connected to the mounting head, and the limiting space is an annular groove distributed along the inner circle of the positioning sleeve.

4. The sensor air gap positioning structure of claim 3, wherein, The triangular strip block is provided with a bevel structure at both ends in the extension direction, and the bevel structure is inclined from the inner side end to the outer side end in the direction gradually close to the mounting head in the extension direction of the triangular strip block.

5. The sensor air gap positioning structure of claim 1, wherein, The ring-shaped contact structure is composed of one or more annular strips with a triangular cross section, and the sharp end of the annular strip is away from the positioning sleeve, and when the ring-shaped contact structure is composed of a plurality of annular strips, the plurality of annular strips are distributed in the radial direction of the positioning sleeve in sequence.

6. The sensor air gap positioning structure of claim 1, wherein, The ring-shaped contact structure is composed of a main body and a contact part, wherein the main body is connected to the positioning sleeve, the contact part is connected to the outer side end of the main body, and the side of the contact part away from the main body is provided with a sharp end.

7. The sensor air gap positioning structure of claim 6, wherein, The contact part includes one or more annular strips with a triangular cross section, and when the contact part includes a plurality of annular strips, the plurality of annular strips are distributed in the radial direction of the positioning sleeve in sequence.

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