Housing for engine camshaft position sensor

Abstract

The utility model discloses a shell for an engine camshaft position sensor. The shell comprises an outer shell and a sensor arranged at the end part of the outer shell, the outer shell comprises a fixing part, a mounting part and a limiting part; a mounting hole for inserting a sensor is formed in the fixing part; the fixing part and the limiting part are respectively positioned at two ends of the mounting part; an abutting limiting ring is arranged on the periphery of the mounting part; six jacking bosses used for abutting against external pressure are evenly distributed on the outer side of the abutting limiting ring in the circumferential direction. An internal thread is formed on the inner peripheral side of the mounting part; a limiting convex part used for limiting the fixing part is formed at the connecting end, used for being in butt joint with the mounting part, of the fixing part; and a limiting groove for embedding and mounting the limiting convex part so as to limit and mount the fixing part is formed in the end surface of the mounting part. The shell for the engine camshaft position sensor is higher in mechanical performance, and the accuracy of the detection position of the sensor can be effectively guaranteed.

Description

Technical Field

[0001] The utility model particularly relates to a housing for an engine camshaft position sensor. Background Art

[0002] With the continuous advancement of automobile technology and the booming automobile market, the performance, efficiency and reliability requirements of engines are constantly improving. In the control and management of engines, the role of various sensors is becoming increasingly important, among which the engine camshaft position sensor plays a key role in the operation of the engine.

[0003] The engine camshaft position sensor monitors the rotational position of the engine camshaft. By transmitting accurate position information to the vehicle's electronic control unit (ECU), the ECU can accurately calculate the opening and closing timing of the valve, thereby controlling parameters such as fuel injection and ignition timing to achieve more efficient combustion and lower emissions. The accuracy and reliability of the camshaft position sensor are critical to engine performance, especially in the modern environment that requires lower fuel consumption and less emissions.

[0004] However, the sensor faces harsh conditions in the engine working environment. After the existing sensor shell structure is installed, it is easy to deform due to factors such as high temperature, high pressure, and strong vibration in the working environment, which affects the detection position accuracy of the sensor. Utility Model Content

[0005] The utility model provides a housing for an engine camshaft position sensor to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0006] A housing for an engine camshaft position sensor comprises: an outer housing and a sensor mounted on an end of the outer housing; the outer housing comprises: a fixing portion for fixing the sensor, a mounting portion for mounting the outer housing at a mounting position inside an engine, and a limiting portion for limiting the mounting position; the fixing portion is formed with a mounting hole for inserting the sensor; the fixing portion and the limiting portion are respectively located at two ends of the mounting portion; the outer periphery of the mounting portion is provided with a resistance limiting ring for uniformly resisting external high pressure to ensure the accuracy of the sensor's detection position; the resistance limiting ring is uniformly provided with a plurality of top pressure bosses for resisting external pressure on the circumferential direction of its outer side; the inner circumferential side of the mounting portion is formed with an internal thread for threadably mounting the outer housing at a mounting position inside the engine; the connection end of the fixing portion for docking with the mounting portion is formed with a limiting convex portion for limiting the fixing portion; the end face of the mounting portion is formed with a limiting groove for embedding the mounting limiting convex portion to limit the mounting of the fixing portion.

[0007] Further, a plurality of stress-relieving concave surfaces for eliminating external pressure to improve stress elimination ability are evenly distributed on the circumference of the outer side of the contact limiting ring; the plurality of stress-relieving concave surfaces and the plurality of pressing convex platforms are arranged alternately, and both sides of the pressing surface of each pressing convex platform are connected to the ends of the stress-relieving concave surfaces on both sides thereof.

[0008] Further, an external thread is formed on the outer circumference of the installation part; the fixing part is threadedly installed on the outer circumference of the installation part through an internally provided internal thread, and a contact limiting ring and a limiting part are formed on the part of the fixing part sleeved on the outer circumference of the installation part; the end of the limiting part extends beyond the end of the installation part.

[0009] Further, the internal thread is a 3 / 8 - UNF24 - 2A American Standard fine thread; the external thread is a 3 / 8 - UNF24 - 2A American Standard fine thread.

[0010] Further, the limiting part includes: a first - layer limiting ring and a second - layer limiting ring formed outside the first - layer limiting ring; the corresponding same ends of the first - layer limiting ring and the second - layer limiting ring are both connected to the end of the contact limiting ring.

[0011] Further, the ratio of the thickness values of the first - layer limiting ring and the second - layer limiting ring is 1:2.

[0012] Further, the ratio of the axial extension width of the second - layer limiting ring to the axial extension width of the first - layer limiting ring is 1:2.

[0013] Further, the outer peripheral surface of the second - layer limiting ring and the inner peripheral surface of the contact limiting ring are located on the same cylindrical surface.

[0014] Further, the fixing part, the limiting part and the installation part are coaxially arranged.

[0015] Further, the outer housing is made of an aluminum alloy material containing aluminum, magnesium and silicon.

[0016] The beneficial effect of the present utility model is that the housing for the engine camshaft position sensor provided has stronger mechanical properties and more stable structural installation, and can effectively ensure the accuracy of the detection position of the sensor in an operating environment of high temperature, high pressure and strong vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1It is a schematic diagram of a housing for an engine camshaft position sensor of the present utility model;

[0019] Figure 2 is Figure 1 a cross-sectional view of a housing for an engine camshaft position sensor in

[0020] Outer housing 10, fixing part 11, limiting convex part 111, mounting hole 112, mounting part 12, limiting groove 121, external thread 122, abutting limiting ring 13, pressing convex platform 131, stress-relieving concave surface 132, limiting part 14, first-layer limiting ring 141, second-layer limiting ring 142, sensor (not shown). Specific embodiments

[0021] The following details the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application and should not be construed as a limitation of the present application.

[0022] In the description of the present application, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0023] In the present application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0024] As Figures 1 to 2As shown in the figure, a housing for an engine camshaft position sensor according to the present application includes: an outer housing 10 and a sensor, and the sensor is installed at the end of the outer housing 10. The outer housing 10 includes: a fixing portion 11, a mounting portion 12, and a limiting portion 14. The fixing portion 11 is used to fix the sensor, that is, the fixing portion 11 is formed with a mounting hole 112 for inserting the above-mentioned sensor. The mounting portion 12 is used to mount the outer housing 10 at the mounting position inside the engine, and the limiting portion 14 is used to limit the mounting position.

[0025] Specifically, the fixing portion 11 and the limiting portion 14 are respectively located at both ends of the mounting portion 12. A resisting limiting ring 13 is provided on the outer circumference of the mounting portion 12, and the resisting limiting ring 13 is used to uniformly resist the external high pressure to ensure the accuracy of the detection position of the sensor. A plurality of pressing bosses 131 are evenly distributed on the outer circumference of the resisting limiting ring 13. Through the pressing bosses 131, the external pressure can be resisted from the circumference of the mounting portion 12, thereby improving the overall mechanical performance of the outer housing 10 and having strong compressive capacity. This solution adopts the design of 6 pressing bosses 131.

[0026] Furthermore, an internal thread is formed on the inner circumferential side of the mounting portion 12, and the outer housing 10 is threadedly mounted at the mounting position inside the engine through the internal thread. When the mounting portion 12 is mounted to the preset position, the limiting portion 14 limits the overall mounting position of the outer housing 10 from the rear end of the mounting portion 12, thereby ensuring the mounting accuracy of the outer housing 10.

[0027] Even further, a limiting convex portion 111 is formed at the connection end of the fixing portion 11 for docking with the mounting portion 12, and a limiting groove 121 is formed on the end face of the mounting portion 12 for embedding and mounting the limiting convex portion 111 to limit the mounting of the fixing portion 11. Through the cooperation of the limiting convex portion 111 and the limiting groove 121, the mounting position of the fixing portion 11 can be limited, and the fixing portion 11 can be prevented from occurring radial offset or radial deformation in an environment of high temperature, high pressure, and strong vibration, thereby ensuring the detection position of the sensor.

[0028] As a specific implementation manner, 6 stress-relieving concave surfaces 132 are also evenly distributed on the outer circumference of the resisting limiting ring 13. The 6 stress-relieving concave surfaces 132 and the 6 pressing bosses 131 are alternately arranged, and both sides of the pressing surface of each pressing boss 131 are connected to the ends of the stress-relieving concave surfaces 132 on both sides thereof. In this way, through the stress-relieving concave surfaces 132, the pressure received by the pressing bosses 131 can be transferred and eliminated, thereby improving the overall stress elimination ability of the outer housing 10 and having strong radial load capacity.

[0029] That is to say, the above technical solution designs a hexagonal fixing part 11 with six detachable pressing bosses 131 for structural assembly. The six evenly distributed pressing bosses 131 provide a better supporting plane, making the outer shell 10 more stable when subjected to external pressure or impact, and not easily deformed or broken.

[0030] As a specific implementation manner, an external thread 122 is formed on the outer periphery of the installation part 12. The fixing part 11 is threadedly installed on the outer periphery of the installation part 12 through an internal thread provided therein, and a contact limiting ring 13 and a limiting part 14 are formed on the part of the fixing part 11 sleeved on the outer periphery of the installation part 12. In this way, the fixing part 11 and the installation part 12 are used as a detachable installation unit. Then, the installation part supports the limiting part radially. The overall mechanical performance is high, the radial load capacity is strong, and the disassembly and assembly are more convenient. At the same time, when the whole shell is installed, the installation position of the sensor can be accurately limited.

[0031] As a specific implementation manner, the above internal thread is a 3 / 8-UNF24-2A American fine pitch thread, and the above external thread 122 is also a 3 / 8-UNF24-2A American fine pitch thread. The integrity of the thread structure is higher, so that the overall structural performance of the outer shell 10 is stronger.

[0032] As a specific implementation manner, the limiting part 14 includes: a first-layer limiting ring 141 and a second-layer limiting ring 142 formed on the outside of the first-layer limiting ring 141. The corresponding same ends of the first-layer limiting ring 141 and the second-layer limiting ring 142 are both connected to the end of the contact limiting ring 13. The thicknesses of the first-layer limiting ring 141 and the second-layer limiting ring 142 are equal. In this way, the inner-layer position is limited by the inner-layer first-layer limiting ring 141, and then the structure is strengthened by the outer-layer second-layer limiting ring 142, so as to enhance the mechanical strength and improve the overall structural stability.

[0033] In addition, the ratio of the axial extension width of the second-layer limiting ring 142 to the axial extension width of the first-layer limiting ring 141 is set to 1:2. In this way, while ensuring the mechanical strength, the limiting part 14 can also have a high stress release capacity, avoiding the situation that the installation structure of the outer shell 10 breaks due to hard extrusion in an environment of high temperature, high pressure and strong vibration.

[0034] Furthermore, the outer peripheral surface of the second-layer limiting ring 142 and the inner peripheral surface of the contact limiting ring 13 are located on the same cylindrical surface. The fixing part 11, the limiting part 14 and the installation part 12 are coaxially arranged. In this way, the compressive capacity of the outer shell 10 in the axial direction can be improved.

[0035] As a specific implementation manner, the outer housing 10 is made of an aluminum alloy material containing aluminum, magnesium, and silicon. The combination of these three alloying elements, aluminum, magnesium, and silicon, endows the alloy material with excellent strength, plasticity, and corrosion resistance, reduces the self-weight of the outer housing 10 while ensuring performance, achieves the balance between strength and lightweight, enables the sensor to maintain stable performance even in harsh environments, and has strong corrosion resistance.

[0036] Therefore, the mechanical properties of the above-mentioned housing for the engine camshaft position sensor are stronger, the installation structure is more stable, and in the operating environment of high temperature, high pressure, and strong vibration, it can effectively ensure the stability of the sensor, thereby ensuring the accuracy of the detection position of the sensor, and the installation structure is also very simple.

[0037] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

Claims

1. A housing for an engine camshaft position sensor, comprising: An outer housing and a sensor mounted at an end of the outer housing; characterized in that, The outer housing includes: a fixing portion for fixing the sensor, a mounting portion for mounting the outer housing at a mounting position inside the engine, and a limiting portion for limiting the mounting position; The fixing portion is formed with a mounting hole for inserting the sensor; The fixing portion and the limiting portion are respectively located at two ends of the mounting portion; An abutting limiting ring for uniformly resisting external high pressure to ensure the accuracy of the detection position of the sensor is provided on the outer periphery of the mounting portion; A plurality of pressing convex platforms for abutting external pressure are uniformly distributed on the outer circumference of the abutting limiting ring; An internal thread for threadedly mounting the outer housing at a mounting position inside the engine is formed on the inner circumferential side of the mounting portion; A limiting convex portion for limiting the fixing portion is formed at a connection end of the fixing portion for docking with the mounting portion; A limiting groove for embedding and mounting the limiting convex portion to limit the mounting of the fixing portion is formed on the end face of the mounting portion.

2. The housing for an engine camshaft position sensor according to claim 1, characterized in that, A plurality of stress-relieving concave surfaces for eliminating external pressure to improve stress elimination ability are also uniformly distributed on the outer circumference of the abutting limiting ring; The plurality of stress-relieving concave surfaces and the plurality of pressing convex platforms are alternately arranged, and both sides of the pressing surface of each pressing convex platform are connected to the ends of the stress-relieving concave surfaces on both sides thereof.

3. The housing for an engine camshaft position sensor according to claim 1, characterized in that, An external thread is formed on the outer periphery of the mounting portion; The fixing portion is threadedly mounted on the outer periphery of the mounting portion through an internal thread provided therein, and a portion of it sleeved on the outer periphery of the mounting portion forms the abutting limiting ring and the limiting portion; The end of the limiting portion extends beyond the end of the mounting portion.

4. The housing for an engine camshaft position sensor according to claim 3, characterized in that, The internal thread is a 3 / 8 - UNF24 - 2A American fine pitch thread; The external thread is a 3 / 8 - UNF24 - 2A American fine pitch thread.

5. The housing for an engine camshaft position sensor according to claim 3, characterized in that, The limiting portion includes: a first-layer limiting ring and a second-layer limiting ring formed outside the first-layer limiting ring; The corresponding same ends of the first-layer limiting ring and the second-layer limiting ring are both connected to the end of the abutting limiting ring.

6. The housing for an engine camshaft position sensor according to claim 5, characterized in that, The ratio of the thickness values of the first-layer limiting ring and the second-layer limiting ring is 1:

2.

7. The housing for an engine camshaft position sensor according to claim 5, characterized in that, The ratio of the axial extension width of the second-layer limiting ring to the axial extension width of the first-layer limiting ring is 1:

2.

8. The housing for an engine camshaft position sensor according to claim 5, characterized in that, The outer circumferential surface of the second layer limiting ring and the inner circumferential surface of the abutting limiting ring are located on the same cylindrical surface.

9. The housing for the engine camshaft position sensor according to claim 1, characterized in that: The fixing portion, the limiting portion and the mounting portion are coaxially arranged.

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