Automotive oil pressure sensor

Abstract

This utility model relates to an automotive oil pressure sensor, which employs a housing on the outside of the sensor; a push block structure inside the housing; a strain gauge deformation device connected to the housing via threads; and an elastic element placed in the cavity between the strain gauge deformation device and the push block structure, and between the housing and the strain gauge deformation device. Pressure enters the housing, pushes the push block structure, causing the elastic element to deform, resulting in displacement of the strain gauge deformation device, controlling the opening of a contact switch, and converting the change in opening into an electrical signal. This achieves a new structure for the elastic element, enabling the automotive oil pressure sensor to maintain its deformation and displacement for extended periods. It solves the technical problem in existing oil pressure sensors where the elastic element's structure prevents it from maintaining its deformation and displacement for long periods.

Description

Technical Field

[0001] Embodiments of this utility model relate to a pressure sensor, and more particularly to an automotive oil pressure sensor used in the automotive industry. Background Technology

[0002] The primary function of the elastic element in an oil pressure sensor is to convert oil pressure into mechanical deformation, which is then converted into an electrical signal by a conversion element (such as a strain gauge). In this process, the characteristics and design of the elastic element directly affect the sensor's accuracy, sensitivity, and reliability. Especially in confined spaces, the elastic element may be subject to greater constraints, affecting its deformation and displacement. In existing oil pressure sensors, due to the structural relationship of their elastic elements, it is impossible to maintain deformation and displacement for extended periods, necessitating a redesign of the internal structure of automotive oil pressure sensors. Utility Model Content

[0003] The purpose of this invention is to provide a structure for an elastic element that can maintain its deformation and displacement over a long period of time in an automotive oil pressure sensor.

[0004] To achieve the above objectives, an embodiment of this utility model designs an automotive oil pressure sensor, comprising:

[0005] Housing; the housing is disposed on the outside of the automotive oil pressure sensor;

[0006] The push block structure is disposed inside the outer casing.

[0007] A strain gauge deformation device is connected to the housing via threads.

[0008] An elastic element is placed in the cavity between the strain gauge deformation device and the push block structure, between the housing and the strain gauge deformation device; pressure enters the housing, pushes the push block structure to cause the elastic element to deform, causing the strain gauge deformation device to displace and controlling the opening of the contact switch.

[0009] Furthermore, in the automotive oil pressure sensor described in this utility model, a sealing ring is provided between the housing and the strain gauge deformation device; a channel is opened in the middle of the housing.

[0010] Furthermore, in the automotive oil pressure sensor described in this utility model, both ends of the push block structure are fixed inside the housing.

[0011] Furthermore, the push block structure of the automotive oil pressure sensor described in this utility model further includes:

[0012] A diaphragm is inserted inside the housing, and the edge of the diaphragm is fixed to the inner edge of the housing.

[0013] A fixing bracket is placed on one side of the diaphragm.

[0014] A push block is movably connected in a through hole in the middle of the fixed bracket; one end of the push block abuts against the elastic element; the other end of the push block abuts against the diaphragm.

[0015] Furthermore, in the automotive oil pressure sensor described in this utility model, a recess is formed in the middle of the fixed bracket on the outer edge of the through hole to accommodate the curvature of the diaphragm when it is bent.

[0016] Furthermore, the automotive oil pressure sensor and strain gauge deformation device described in this utility model further include:

[0017] An inner nesting component is threadedly connected to the interior of the outer shell;

[0018] A first insertion hole is provided on one side of the inner nesting member;

[0019] A second insertion hole is provided on the other side of the inner nesting member;

[0020] A plurality of said pins are inserted through the first socket to the second socket and are fixed within the inner nesting member;

[0021] A strain gauge, wherein one end of the strain gauge is fixedly connected to one of the pins; and a contact is fixedly attached to the other end of the strain gauge.

[0022] A contact piece is attached to one end of the contact point on one side; the other side of the contact point is fixed to the side of the second socket.

[0023] Furthermore, in the automotive oil pressure sensor described in this utility model, the strain gauge is bent to one side, so that the contact point is close to one end of the contact gauge.

[0024] Furthermore, in the automotive oil pressure sensor described in this utility model, the strain gauge bends in the same direction as the elastic element in its initial state; and under pressure, the strain gauge bends in the opposite direction to the elastic element.

[0025] Furthermore, in the automotive oil pressure sensor described in this utility model, the elastic element is made of 301 stainless steel and is formed by two stress-relief annealing processes and two stamping processes.

[0026] Furthermore, in the automotive oil pressure sensor described in this utility model, the outer side of the automotive oil pressure sensor is connected to a pressure controller via a pin.

[0027] Compared with the prior art, the present invention employs a housing on the outside of the automotive oil pressure sensor; a push block structure inside the housing; a strain gauge deformation device connected to the housing via threads; and an elastic element placed in the cavity between the strain gauge deformation device and the push block structure, and between the housing and the strain gauge deformation device. Pressure enters the housing, pushing the push block structure to cause deformation of the elastic element, resulting in displacement of the strain gauge deformation device, controlling the opening of the contact switch, and converting the change in opening into an electrical signal. This achieves a new structure for the elastic element, enabling an automotive oil pressure sensor to maintain its deformation and displacement for extended periods. It solves the technical problem in existing oil pressure sensors where the elastic element's structure prevents it from maintaining its deformation and displacement for long periods. It also addresses applications where traditional elastic elements are unsuitable due to space constraints; the employed elastic element still maintains good elastic performance. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the internal structure of the elastic element of this utility model in its initial state;

[0029] Figure 2 for Figure 1 A schematic diagram of the internal structure deformation of the contact opening / closing controlled by the deformation of the elastic element under pressure;

[0030] Figure 3 This is a schematic diagram showing the relationship between the deformation (ΔL) and load (F) of an elastic element. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0032] The embodiments of this utility model relate to an automotive oil pressure sensor, such as... Figure 1 and Figure 2 As shown, it includes:

[0033] In this embodiment, a housing 1 is provided on the outside of the automotive oil pressure sensor; the housing 1 mainly serves the functions of connection and protection.

[0034] A push block structure 2 is provided inside the outer shell 1; the push block structure 2 is mainly able to push the elastic element 4 to deform under pressure.

[0035] The strain gauge deformation device 3 is connected to the housing 1 by threads; the strain gauge deformation device 3 mainly functions to control the opening of the contact switch 31 when displacement occurs.

[0036] An elastic element 4 is placed in the cavity between the strain gauge deformation device 3 and the push block structure 2, and between the outer shell 1 and the strain gauge deformation device 3. Pressure enters the outer shell 1, pushing the push block structure 2 and causing the elastic element 4 to deform, thus displacing the strain gauge deformation device 3 and controlling the opening of the contact switch. The main function of the elastic element 4 is to deform. The above structure enables the automotive oil pressure sensor to maintain its deformation and displacement for a long time; it solves the technical problem that existing oil pressure sensors cannot maintain their deformation and displacement for a long time due to the structural relationship of their elastic elements. It solves the application that traditional elastic elements cannot achieve when space is constrained; the elastic element used still maintains good elastic performance.

[0037] To achieve the above-mentioned technical effects, the automotive oil pressure sensor in this embodiment, such as... Figure 1 and Figure 2 As shown, a sealing ring 5 is provided between the outer shell 1 and the strain gauge deformation device 3; a channel 6 is opened in the middle of the outer shell 1. The sealing ring 5 is used to seal the gap between the outer shell 1 and the strain gauge deformation device 3; to prevent fluid leakage during the process of sealing the gap between the outer shell 1 and the strain gauge deformation device 3; and to prevent the pressure of fluid entering the channel 6.

[0038] To achieve the above-mentioned technical effects, the automotive oil pressure sensor in this embodiment, such as... Figure 1 and Figure 2 As shown, the two ends of the push block structure 2 are fixed inside the outer casing 1. This makes the push block structure 2 a movable structure that uses fluid pressure to push the elastic element 4.

[0039] To achieve the above-mentioned technical effects, the automotive oil pressure sensor in this embodiment, such as... Figure 1 and Figure 2 As shown, the push block structure 2 also includes:

[0040] A diaphragm 21 is inserted inside the outer casing 1, and the edge of the diaphragm 21 is fixed to the inner edge of the outer casing 1. Under the action of fluid pressure, the diaphragm 21 forms a protruding structure and pushes the pusher block 23 to move, thus forming the structure of diaphragm 21 pushing block 23.

[0041] A fixing bracket 22 is placed on one side of the diaphragm 21; the fixing bracket 22 mainly serves to support the diaphragm 21.

[0042] The push block 23 is movably connected in the through hole in the middle of the fixed bracket 22; one end of the push block 23 abuts against the elastic element 4; the other end of the push block 23 abuts against the diaphragm 21.

[0043] To achieve the above-mentioned technical effects, the automotive oil pressure sensor in this embodiment, such as... Figure 1 and Figure 2 As shown, a recessed hole 24 is made in the middle of the fixed bracket 22 on the outer edge of the through hole to fit the curvature of the diaphragm 21 when it is bent.

[0044] To achieve the above-mentioned technical effects, the automotive oil pressure sensor in this embodiment, such as... Figure 1 and Figure 2 As shown, the strain gauge deformation device 3 also includes:

[0045] The inner nesting part 31 is connected inside the outer casing 1 by a thread;

[0046] A first insertion hole 32 is opened on one side of the inner nesting member 31;

[0047] A second socket 33 is provided on the other side of the inner nesting member 31; a first socket 32 ​​and a second socket 33 are provided on the inner nesting member 31 from front to back respectively.

[0048] Several pins 34 are inserted through the first socket 32 ​​to the second socket 33 and fixed in the inner nesting member 31; the pins 34 protrude from the first socket 32 ​​to the second socket 33.

[0049] One end of a fixed strain gauge 35 is connected to one of the pins 34; a contact 36 is fixed to the other end of the strain gauge 35; after the elastic element 4 drives the strain gauge 35 to deform, it drives the contact 37, causing the contact 36 to move away from one end of the contact 37.

[0050] One end of the contact piece 37 is connected to one side of the contact 36; the other side of the contact 36 is fixed to the side of the second socket 33.

[0051] To achieve the above-mentioned technical effects, the automotive oil pressure sensor in this embodiment, such as... Figure 1 and Figure 2 As shown, strain gauge 35 bends to one side, so that contact 36 is pressed against one end of contact piece 37.

[0052] To achieve the above-mentioned technical effects, the automotive oil pressure sensor in this embodiment, such as... Figure 1 and Figure 2 As shown, in the initial state, the strain gauge 35 bends in the same direction as the elastic element 4; when under pressure, the strain gauge 35 bends in the opposite direction to the elastic element 4.

[0053] To achieve the above-mentioned technical effects, the automotive oil pressure sensor in this embodiment, such as... Figure 1 and Figure 2 As shown, the elastic element 4 is made of 301 stainless steel and is formed by two stress-relief annealing processes and two stamping processes.

[0054] To achieve the above-mentioned technical effects, such as Figure 1 and Figure 2 As shown, in this embodiment, the outer side of the automotive oil pressure sensor is connected to the pressure controller via pin 34. The pressure controller receives the changing state of the opening and converts the changing state of the opening into an electrical signal.

[0055] The automotive oil pressure sensor in this embodiment, such as Figure 3 As shown, using 301 stainless steel as raw material, the strength and elastic limit can be significantly improved after cold deformation. Through process optimization of two stress-relief annealing and two stamping forming, a component with stable elastic properties is produced, and its peak force, valley force and difference are measured using special instruments.

[0056] The stamping process directly affects the geometry and internal stress distribution of elastic elements. Initial stamping: preliminary shaping, causing plastic deformation of the material and increasing strength. Secondary fine stamping: adjusting shape accuracy, ensuring the dimensional stability of the elastic element, and further optimizing stress distribution.

[0057] A specialized mechanical testing instrument was used to cyclically load the elastic element, measuring its peak force (Fmax), trough force (Fmin), and difference (ΔF) to evaluate its elastic recovery capability and stability. According to Hooke's Law, the relationship between the deformation (ΔL) of the elastic element and the load (F) is as follows:

[0058] F=k*ΔL

[0059] Where k is the elastic stiffness, which is related to the material's elastic modulus (E) and geometric dimensions. After cold working, the yield strength of 301 stainless steel increases, but its elastic modulus remains essentially unchanged. Therefore, the optimized elastic element has a higher elastic limit, can withstand greater deformation without plastic deformation, and exhibits more stable elastic recovery with a smaller difference ΔF, indicating good resilience.

[0060] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An automotive oil pressure sensor, characterized in that, include: shell; The housing is provided on the outside of the automotive oil pressure sensor; A push block structure is provided inside the outer casing; A strain gauge deformation device is connected to the housing via threads. An elastic element is placed between the strain gauge deformation device and the push block structure, in the cavity between the outer shell and the strain gauge deformation device; Pressure enters the outer shell, pushing the push block structure to deform the elastic element, causing the strain gauge deformation device to displace and controlling the opening of the contact switch.

2. The automotive oil pressure sensor according to claim 1, characterized in that, A sealing ring is provided between the outer shell and the strain gauge deformation device; a channel is opened in the middle of the outer shell.

3. The automotive oil pressure sensor according to claim 1, characterized in that, The two ends of the push block structure are fixed inside the outer casing.

4. The automotive oil pressure sensor according to claim 1, characterized in that, The aforementioned push block structure also includes: A diaphragm is inserted inside the housing, and the edge of the diaphragm is fixed to the inner edge of the housing. A fixing bracket is placed on one side of the diaphragm. A push block is movably connected in a through hole in the middle of the fixed bracket; one end of the push block abuts against the elastic element; the other end of the push block abuts against the diaphragm.

5. The automotive oil pressure sensor according to claim 4, characterized in that, A recessed hole is formed in the middle of the fixed bracket on the outer edge of the through hole to accommodate the curvature of the diaphragm when it is bent.

6. The automotive oil pressure sensor according to claim 1, characterized in that, The strain gauge deformation device further includes: An inner nesting component is threadedly connected to the interior of the outer shell; A first insertion hole is provided on one side of the inner nesting member; A second insertion hole is provided on the other side of the inner nesting member; A plurality of said pins are inserted through the first socket to the second socket and are fixed within the inner nesting member; A strain gauge, wherein one end of the strain gauge is fixedly connected to one of the pins; and a contact is fixedly attached to the other end of the strain gauge. A contact piece is attached to one end of the contact point on one side; the other side of the contact point is fixed to the side of the second socket.

7. The automotive oil pressure sensor according to claim 6, characterized in that, The strain gauge is bent to one side, so that the contact point is pressed against one end of the strain gauge.

8. The automotive oil pressure sensor according to claim 7, characterized in that, In its initial state, the strain gauge bends in the same direction as the elastic element; under pressure, the strain gauge bends in the opposite direction to the elastic element.

9. The automotive oil pressure sensor according to claim 1, characterized in that, The elastic element is made of 301 stainless steel and is formed by two stress-relief annealing processes and two stamping processes.

10. The automotive oil pressure sensor according to any one of claims 1-9, characterized in that, The external side of the automotive oil pressure sensor is connected to the pressure controller via a pin.

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