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Gear ring positioning sleeve of passive wheel speed sensor and positioning process thereof

A wheel speed sensor and sensor technology, applied in instruments, devices using electric/magnetic methods, speed/acceleration/impact measurement, etc., can solve the problems of difficult control of concentricity requirements, high product scrap rate, etc., and reduce scrap The effect of improving efficiency and improving performance

Inactive Publication Date: 2010-08-04
杭州南科汽车传感器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the gap between the ring gear on the skeleton and the inner wall of the housing directly affects the use effect of the automobile wheel speed sensor, that is, the concentricity between the center of the ring gear and the center of the housing is relatively high, and the injection molding packaging process between the bottom of the skeleton and the housing is practical. It is not easy to control the concentricity requirements between the ring gear on the frame and the inner wall of the shell during operation, resulting in high product scrap rate

Method used

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  • Gear ring positioning sleeve of passive wheel speed sensor and positioning process thereof
  • Gear ring positioning sleeve of passive wheel speed sensor and positioning process thereof
  • Gear ring positioning sleeve of passive wheel speed sensor and positioning process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: refer to Figure 1~3 . The ring gear positioning sleeve of the passive wheel speed sensor. The passive wheel speed sensor includes a housing 3 and a sensor sensing part 2. The sensor sensing part 2 is integrally injection molded and packaged, including a skeleton 2-3, a magnetic steel 2-4, The coil 2-2 and the ring gear 2-1, the bottom of the sensing part 2 of the sensor is connected to the bottom wall of the housing 3 by injection molding, and the center hole of the sensing part 2 of the sensor is provided with a positioning hole 4 near the bottom of the housing 3, and the sensor The outer wall 2-5 of the sensing part 2 is separated from the inner wall 3-1 of the housing 3 to form a gap 6. The ring gear positioning sleeve 1 is tubular, and the thickness of the tube wall is the distance between the outer wall 2-5 of the sensor sensing part 2 and the housing 3. There is a gap 6 between the inner walls 3-1, the outer wall of the ring gear positioning sleeve...

Embodiment 2

[0017] Embodiment 2: refer to Figure 4 . The ring gear positioning sleeve 1 is "convex" shape, the tube wall thickness of the smaller diameter end is the gap 6 between the outer wall 2-5 of the sensor sensing part 2 and the inner wall 3-1 of the housing 3, the ring gear positioning sleeve 1 The outer wall of the smaller diameter end matches the inner wall 3 - 1 of the housing 3 , its inner wall matches the outer wall 2 - 5 of the sensing part 2 of the sensor, and its outer stepped surface matches the opening of the housing 3 .

Embodiment 3

[0018] Embodiment 3: refer to Figure 1~3 . A ring gear positioning process for a passive wheel speed sensor, comprising the following steps: a. Embedding the front end of the ring gear positioning sleeve 1 into a space formed by the outer wall 2-5 of the sensor sensing part 2 and the inner wall 3-1 of the housing 3 In the gap 6, and the outer wall of the front end of the ring gear positioning sleeve 1 is connected with the inner wall 3-1 of the outer casing 3, and its inner wall is connected with the outer wall 2-5 of the sensor induction sleeve 2; b. Inject the ring into the positioning port 4 of the sensor induction sleeve 1 Oxygen resin 5 is used to make the second connection between the bottom of sensor sensing part 2 and the bottom wall of housing 3 through epoxy resin 5; c, after epoxy resin 5 is solidified, take out ring gear positioning sleeve 1.

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Abstract

The invention relates to a gear ring positioning sleeve of a passive wheel speed sensor and a positioning process thereof. The gear ring positioning sleeve is tubular; the outer wall of the gear ring positioning sleeve is matched with the inner wall of a shell; and the inner wall of the gear ring positioning sleeve is matched with the outer wall of the sensing part of the sensor. The positioning process comprises the steps of: a. embedding the front end of the gear ring positioning sleeve in a gap formed by the outer wall of the sensing part of the sensor and the inner wall of the shell, wherein the outer wall of the front end of the gear ring positioning sleeve is connected with the outer wall of the shell and the inner wall of the front end of the gear ring positioning sleeve is connected with the outer wall of a sensing sleeve of the sensor; b. injecting epoxy resin in a positioning opening of the sensing sleeve of the sensor so that the bottom of the sensing part of the sensor is in secondary connection with the bottom wall of the shell through the epoxy resin; and c. taking out the gear ring positioning sleeve after the epoxy resin is solidified. The invention can ensure the concentricity requirement of a gear ring center and a shell center, improve the use performance of products, and reduce the rejection rate of production.

Description

technical field [0001] The invention relates to a ring gear positioning method of an automobile wheel speed sensor, in particular to a ring gear positioning sleeve of a passive wheel speed sensor and a positioning process thereof. Background technique [0002] In the prior art, a passive wheel speed sensor includes a shell, a frame, a magnet, a coil and a magnet. The shell is provided with a frame, the bottom of the frame is connected to the shell by injection molding, and the outer wall of the frame is separated from the inner wall of the shell to form a gap. A ring gear is arranged inside, and the ring gear is connected to the frame, and the frame is provided with a coil slot near the end of the ring gear, and the coil is wound in the coil slot, and the inner wall of the housing is provided with a magnetic steel slot, and the magnetic steel is located in the magnetic steel slot; The processing steps are as follows: after the framework, magnetic steel, coil and magnetic ste...

Claims

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Application Information

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IPC IPC(8): G01P1/00G01P3/44
Inventor 万国强张鸿万国兴
Owner 杭州南科汽车传感器有限公司
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