CN107782340B

CN107782340B - Crankshaft sensor

Info

Publication number: CN107782340B
Application number: CN201610730177.6A
Authority: CN
Inventors: 李超; 刘玉巍; 宋洪伟; 唐翌; 李高略; 赵达
Original assignee: Continental Automotive Corp Lianyungang Co Ltd
Current assignee: Continental Automotive Corp Lianyungang Co Ltd
Priority date: 2016-08-26
Filing date: 2016-08-26
Publication date: 2024-07-12
Anticipated expiration: 2036-08-26
Also published as: CN107782340A

Abstract

The invention relates to a crankshaft sensor which comprises a bracket assembly and a shell, wherein the shell is secondarily injection-molded on the bracket assembly, and the surface of the shell is provided with a groove. The shell surface is provided with the groove, the pouring gate is arranged in the groove, the material can be prevented from remaining protruding out of the shell surface, and scraps generated in the process of inserting the sensor into the mounting hole fall into the groove, so that the increase of the insertion force caused by the scraps is avoided.

Description

Crankshaft sensor

Technical Field

The invention relates to a vehicle body control technology, in particular to a crankshaft sensor.

Background

In an automobile control system, the application of the sensor technology enables the automation degree of automobile control to be higher and higher, and the driving safety performance of an automobile is optimized. Sensors for multiple functions exist in various functional modules of the vehicle, for example, a crank sensor is one of the most prominent sensors in an electronic engine control system that provides ignition timing and a signal identifying crank position for detecting piston top dead center, crank angle, and engine speed.

The crank sensor generally requires a secondary injection molding, a primary injection molding of the sensor bracket assembly, and a secondary injection molding of the sensor housing based on the bracket assembly. During secondary injection molding, the surface of the sensor shell can leave a blanking handle residue at the gate position, and the residue can protrude out of the surface of the shell to influence the installation of the sensor. In addition, the crank sensor may increase the insertion force of the sensor by scraping the surface of the housing to form debris when the crank sensor is inserted into the mounting hole.

Disclosure of Invention

The invention aims to provide a crank shaft sensor which can prevent material residues from protruding out of the surface of a shell, and the insertion force of the sensor can be effectively controlled in the process of inserting the sensor into an installation hole.

The invention provides a crankshaft sensor which comprises a bracket assembly and a shell, wherein the shell is secondarily injection-molded on the bracket assembly, and the surface of the shell is provided with a groove.

Preferably, the groove extends circumferentially along the housing.

Preferably, the housing has a cylindrical first surface and a planar second surface, and the groove extends along the circumferential direction of the first surface.

Preferably, the housing has a body, a flange, and a connector housing protruding from the flange, the body includes a mounting end, the first surface of the housing has a rib, and the rib is located between the groove and the mounting end.

Preferably, the second surface of the housing has reinforcing ribs extending in the longitudinal direction.

Preferably, the surface of the reinforcing rib is further provided with a groove, and a convex rib is further arranged between the groove and the mounting end.

Preferably, the grooves are located at the same height on the shell, and the ribs are also located at the same height on the shell.

Preferably, one end of the body close to the flange plate is further provided with a rib structure in a protruding mode.

Preferably, the mounting end is inclined at an angle.

Preferably, the bracket assembly comprises a bracket body, a positioning part for positioning the bracket assembly during injection molding of the bracket assembly and the shell is arranged on the bracket body, and a sealing structure is further arranged on the periphery of the positioning part.

Compared with the prior art, the shell surface is provided with the groove, the pouring gate is arranged in the groove, the material can be prevented from remaining protruding on the shell surface, and scraps generated in the process of inserting the sensor into the mounting hole fall into the groove, so that the increase of the insertion force caused by the scraps is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 is a perspective view of a crank sensor of the present invention;

FIG. 2 is a cross-sectional view of the crankshaft sensor shown in FIG. 1;

FIG. 3 is a perspective view of a bracket assembly of the crankshaft sensor of FIG. 1;

fig. 4 is a perspective view of the crankshaft sensor shown in fig. 1 mounted on a mounting target.

Detailed Description

Referring to fig. 1 to 2, the crank sensor of the present invention includes a bracket assembly 1 and a housing 2, and referring to fig. 3, the bracket assembly 1 includes an electronic component and a bracket body 10. The electronic component comprises at least one or more of a resistor, a magnet, a chip and a metal terminal. In this embodiment, the bracket assembly (not shown) includes a bracket body 10, and the bracket body 10 is used for carrying a resistor 11, a chip 12, and positioning a metal terminal 13. The shell 2 is formed on the bracket assembly 1 by two-time injection molding, and the shell 2 is made of resin. The surface of the housing 2 is provided with a groove 20, when the crank sensor is inserted into the mounting hole of the mounting object 3, the surface of the housing 2 is scraped, part of resin is scraped to form scraps, and the groove 20 can be used for storing part of scraps, so that the scraps are prevented from increasing the insertion force. And the gate of the injection molded housing 2 is located in the recess 20, which protrudes from the surface of the housing 2, since the gate position leaves a residue of the material after the injection molding is completed. When the gate is placed in this recess 20, the residue of the material will be prevented from protruding beyond the surface of the housing 2.

The housing 2 has a body 23, a flange 24 and a connector housing 25 protruding from the flange 24, the recess 20 extending circumferentially along the housing 2, the housing 2 having two opposing arcuate first surfaces 21 and two opposing planar second surfaces 22, the recess 20 extending circumferentially along the first surfaces 21. The body 23 includes a mounting end 231, and the two first surfaces 21 of the housing 2 have a protruding rib 211, and the protruding rib 211 is located between the groove 20 and the mounting end 231, so as to play a role in fixing the sensor after the sensor is inserted into the mounting hole.

Referring to fig. 1 and 4, the mounting object 3 has a cylindrical shape Kong Chengyuan, and when the crank sensor is inserted into the mounting hole, the first surface 21 of the curved surface engages with the inner wall of the mounting hole, and the second surface 22 of the curved surface has a certain clearance with the inside of the mounting hole. At each of the two second surfaces 22 of the housing 2 there is a reinforcing rib 221 extending in the longitudinal direction. The ribs 221 have a width in the range of 2.5 mm to 3.5 mm and a height in the range of 2.7 mm to 3.7 mm. The ribs 221 serve as positioning in the process of assembling the crank sensor to the mounting target 3. The surface of each reinforcing rib 221 is further provided with a groove 20 and a protruding rib 211, and the protruding rib 211 is also located between the groove 20 and the mounting end 231. In this embodiment, each groove 20 is located at the same height on the housing 2, and 4 ribs 211 are also located at the same height on the housing 2. The imaginary circle formed by the 4 ribs 211 has a diameter larger than the mating diameter of the mounting hole, meaning that after the sensor is inserted, a portion of the resin of the ribs 211 will be scraped off and fall into the recess 20. In this way, the ribs 211 are tightly matched with the inner wall of the mounting hole, and a good fixing effect is achieved.

The flange 24 further has a screw hole 241 and a metal ring 242, the metal ring 242 is disposed on an outer ring of the screw hole 241, and is mounted to a mounting target by a bolt, and the metal ring 242 is used for protecting the mounting hole.

The body 23 leans on flange 24 one end to further be provided with 4 rib structures 235 in the outstanding, 4 rib structures correspond with 4 protruding muscle 211 one-to-one respectively, play better fixed crank shaft sensor's effect.

The mounting end 231 is inclined at a certain angle to match with the chip shape and the mounting environment, so that signals can be transmitted better.

Referring to fig. 3, the bracket assembly 1 includes a bracket body 10, a positioning portion 101 for positioning the bracket assembly 1 when the bracket assembly 1 and the housing 2 are injection molded is disposed on the bracket body 10, and a sealing structure is further disposed on the periphery of the positioning portion 101. Specifically, the sealing structure provided on the periphery of the positioning portion 101 includes a sealing rib 102 and a reinforcing rib 103, so as to prevent the material flow force from impacting the positioning portion 101 at the position facing or adjacent to the gate during the secondary injection molding. The sealing rib 102 is protruded on the surface of the bracket body 11 around the positioning part 101, and the reinforcing rib 103 is protruded around the periphery of the sealing rib 102 so as to buffer the flow strength flowing to the sealing rib 102 and the positioning part 101 during the secondary injection molding.

While the invention has been described in terms of preferred embodiments, the invention is not so limited. Any person skilled in the art shall not depart from the spirit and scope of the present invention and shall accordingly fall within the scope of the invention as defined by the appended claims.

Claims

1. A crank sensor comprising a bracket assembly and a housing, the housing being injection molded over the bracket assembly and the housing including an insertion portion to be inserted into a mounting hole of a mounting target, characterized in that: the surface of the insertion portion of the housing has a groove for storing chips formed by scraping the surface of the housing when the housing is inserted into the mounting hole, and a gate for injection molding the housing is located in the groove.

2. The crankshaft sensor of claim 1, wherein the groove extends circumferentially along the housing.

3. The crankshaft sensor of claim 2, wherein the housing has an arcuately shaped first surface and a planar second surface, the recess extending circumferentially of the first surface.

4. A crank sensor according to claim 3, wherein the housing has a body, a flange and a connector housing protruding from the flange, the body including a mounting end, the first surface of the housing having a bead, the bead being located between the recess and the mounting end.

5. The crankshaft sensor of claim 4, wherein the second surface of the housing has a stiffener extending in a longitudinal direction.

6. The crank sensor of claim 5 wherein the rib surface is further provided with a groove and a bead is provided between the groove and the mounting end.

7. The crank sensor of claim 6 wherein the grooves are located at the same height on the housing and the ribs are located at the same height on the housing.

8. The crankshaft sensor of claim 4, wherein the body further includes a rib protruding from an end of the body adjacent the flange.

9. The crankshaft sensor of claim 4, wherein the mounting end is disposed at an angle.

10. The crank sensor of any one of claims 1 to 9, wherein the bracket assembly comprises a bracket body, a positioning part for positioning the bracket assembly when the bracket assembly and the housing are injection molded is arranged on the bracket body, and a sealing structure is further arranged on the periphery of the positioning part.