High pressure resistant proximity sensor

Abstract

The utility model relates to the technical field of proximity sensors, in particular to a high-pressure-resistant proximity sensor. The utility model relates to a high-pressure-resistant proximity sensor, which comprises a shell component and a sensing component, the sensing part comprises a circuit board, a probe, a connecting piece and an elastic piece. The front cover is used for protecting the probe, and is matched with the end part of the shell to package the probe, so that the stability of the detection environment of the probe is ensured, the head part adopts a tank-shaped design, and a bulge and a groove are designed on the tank body to buffer pressure, so that the sealing is tighter, the probe does not lose efficacy under the action of high pressure, and the product performance is qualitatively improved; an adjustable elastic piece part is additionally arranged at the bottom of the circuit board to be connected with the circuit board and the shell, the position of the circuit board is conveniently adjusted, the elastic piece is matched with an end connecting piece to support the circuit board, a sliding groove in the middle of a check block can limit the elastic piece, an assembly installed at the upper end of the elastic piece is kept to move front and back at a specific position, and the circuit board assembly is prevented from loosening. And the influence of external vibration and other factors on circuit board components is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of proximity sensors, in particular to a high-pressure resistant proximity sensor. Background Art

[0002] A proximity sensor is a device that can sense the approach of an object. It uses the sensitive characteristics of a displacement sensor to identify the approach of an object and output a corresponding switch signal. A proximity sensor is usually called a proximity switch. It can detect the movement and existence information of an object and convert it into an electrical signal without contacting the object.

[0003] The existing high-pressure proximity sensor detection head pressure surface adopts a ceramic disc which is tightly combined with the metal part of the sensor to achieve the purpose of high-pressure resistance. The disadvantage is that the ceramic disc is easy to crack and the sealing is poor, which causes oil leakage when the pressure of the hydraulic cylinder is too high. In actual application, it is reflected that the sensor head is cracked or leaked due to excessive pressure, resulting in sensor failure, and finally causing the equipment to not operate normally.

[0004] Therefore, those skilled in the art provide a high-voltage proximity sensor to solve the problems raised in the above background technology. Summary of the invention

[0005] The technical problem to be solved by the utility model is that the existing technology has the disadvantages that the ceramic sheet is easy to crack and the sealing is poor, which causes the outlet oil leakage when the pressure of the hydraulic cylinder is too high, resulting in the failure of the sensor and the failure of the equipment to operate normally. For this reason, we propose a high-pressure proximity sensor.

[0006] The utility model solves the technical problem by adopting the following technical solution: a high-pressure resistant proximity sensor comprises a shell component and a sensing component, wherein the shell component comprises a shell, a front cover and a tail cover, wherein the front cover is plugged into the end of the shell, a receiving cavity structure is provided inside the front cover, and the tail cover is threadedly connected to the tail of the shell;

[0007] The sensing component includes a circuit board, a probe, a connector and a spring. The connector is movably inserted into the shell, one end of the circuit board is fixedly connected to the connector, and the other end of the circuit board is fixedly connected to the spring. The probe is installed at the end of the circuit board, and the probe is electrically connected to the circuit board. The end of the probe is inserted into the center position of the end of the shell, and the probe is located on the inner wall of the front cover.

[0008] The effects achieved by the above components are: adding a shell component consisting of a shell, a front cover and a tail cover to protect the sensing component, wherein the shell is used to cooperate with the installation of various components to prevent the components from loosening, the front cover and the tail cover are used to close the shell, maintain the stability of the internal environment of the shell, and reduce the impact of the external environment on the sensing component, the sensing component consisting of a circuit board, a probe, a connector and a spring is used to monitor the target area, the probe is docked with the front cover, the front cover is used to protect the probe, and the probe is encapsulated in cooperation with the end of the shell to ensure the stability of the probe detection environment, the circuit board is used to power the probe and transmit data, the connector is used to cooperate with the shell to install the circuit board, maintain the stability of the circuit board position, and facilitate the docking of the circuit board with the probe, and at the same time, the spring is added to connect the bottom of the circuit board, the spring is used to cooperate with the shell to support the tail of the circuit board, and support the circuit board together with the connector to further prevent the circuit board from loosening.

[0009] Preferably, the front cover is a can-shaped structure, the side wall of the front cover end is provided with a side strip matching the inner side wall of the shell end, and the front cover is sealingly installed on the inner side of the shell end.

[0010] The effects achieved by the above components are: the front cover of the can-shaped structure and the side wall can simultaneously add groove shapes to buffer the pressure, improve the structural strength of the front cover, protect the probe components, and provide higher sealing and pressure resistance under high pressure to prevent the probe from being damaged by pressure.

[0011] Preferably, the inner side wall of the shell end is provided with a side strip structure matching the side wall of the front cover, and the probe is located inside the side strip structure.

[0012] The effect achieved by the above components is: a side strip structure is set on the inner wall of the shell, which can limit and guide the probe, facilitate the docking of the probe with the front cover, ensure the docking accuracy between the probe and the front cover, prevent the probe from shaking, improve the strength of the shell side wall, and protect the probe side wall.

[0013] Preferably, a through hole structure is opened in the middle of the other end of the circuit board, a connecting rod is fixedly installed in the middle of the spring sheet, and the end of the connecting rod is inserted in the middle of the through hole at the other end of the circuit board.

[0014] The effect achieved by the above components is: adding a through-hole structure in the middle of the circuit board to facilitate the connecting rod installed in the middle of the connecting rod to pass through the circuit board, and limiting the spring piece through the circuit board and the connecting rod to prevent the spring piece from shaking left and right and affecting the stability of the position of the circuit board components.

[0015] Preferably, the top of the connecting rod is threadedly connected to a limiting block, the limiting block is located on the upper end surface of the circuit board, and the limiting block does not contact the surface components of the circuit board.

[0016] The effect achieved by the above-mentioned components is: a limit block with a threaded connection is added to the end of the connecting rod, the limit block can limit the circuit board to prevent the circuit board from loosening from the end of the connecting rod, and the limit block is turned downward so that the limit block cooperates with the circuit board to pull the connecting rod, and the spring sheet is further pulled through the connecting rod to make the spring sheet shrink inward, so that the distance between the bottom of the spring sheet and the bottom of the circuit board is reduced, which can facilitate the adjustment of the position of the circuit board and cooperate with the end connecting piece to support the circuit board.

[0017] Preferably, a stopper is provided on one side of the interior of the shell, a slide groove structure is provided in the middle of the stopper, and the lower end of the spring is in sliding contact with the slide groove in the middle of the stopper.

[0018] The effect achieved by the above components is: a block is added inside the shell to cooperate with the spring sheet, and the middle slide groove of the block can limit the spring sheet, keeping the component installed on the upper end of the spring sheet moving back and forth in a specific position, preventing the circuit board component from loosening, and reducing the impact of external vibration and other factors on the circuit board components.

[0019] Preferably, the lower end of the spring piece is provided with an arc-shaped edge structure, and one end of the middle sliding groove of the stopper is provided with a limiting groove structure matching the arc-shaped edge of the end of the spring piece.

[0020] The effect achieved by the above-mentioned components is: an arc-shaped edge structure is added to the lower end of the spring piece. When the spring piece moves to the end of the middle slide groove of the block, the arc-shaped edge of the lower end of the spring piece can be clamped on the inner side of the slide groove of the block, which plays a certain limiting role on the spring piece, further maintains the stability of the position of the spring piece assembly, and facilitates the disassembly and assembly of the spring piece assembly.

[0021] Preferably, a wire is sealed and plugged in the middle of the tail cover, and the end of the wire is electrically connected to the circuit board.

[0022] The effects achieved by the above components are: installing a wire in the middle of the tail cover to connect with the circuit board, facilitating power supply and signal transmission of the circuit board and the probe components, and maintaining stable operation of the circuit board and the probe.

[0023] Preferably, the side wall of the connector is provided with an arc-shaped edge structure matching the inner wall of the shell, the middle side wall of the connector is provided with a positioning column matching the positioning hole at the end of the circuit board, and the end of the positioning column is inserted in the middle of the positioning hole at the end of the circuit board.

[0024] The effects achieved by the above components are: the side walls of the connector are provided with arc-shaped edges that dock with the shell, which makes it convenient to install the connector into the shell, and the side walls of the connector can better fit with the inner wall of the shell, maintaining the stability of the circuit board components installed on the side walls of the connector, and positioning columns are added to the side walls of the connector, and the positioning holes at the ends of the circuit board are placed on the positioning columns. The circuit board can be limited by the connector, keeping the ends of the circuit board always docked with the connector to prevent the circuit board from loosening.

[0025] Preferably, a rubber sleeve is sleeved on the upper end of the positioning column, and the rubber sleeve is located on the upper end surface of the circuit board.

[0026] The effect achieved by the above components is: a rubber sleeve is installed on the top of the positioning column, the rubber sleeve can limit the circuit board, prevent the end of the circuit board from loosening from the side wall of the connector, maintain the stability of the connection structure between the circuit board and the connector, and facilitate the installation of the circuit board into the shell.

[0027] The beneficial effects of the utility model are:

[0028] The front cover in the utility model is used to protect the probe, and cooperates with the end of the shell to encapsulate the probe to ensure the stability of the probe detection environment. The head adopts a can-shaped design, and the can body is designed with a convex and concave shape to buffer the pressure. At the same time, the seal is tighter and will not fail under high pressure, and the product performance is qualitatively improved. The circuit board is used to power the probe and transmit data. The connector is used to cooperate with the shell to install the circuit board, maintain the stability of the circuit board position, and facilitate the connection between the circuit board and the probe. At the same time, a spring sheet is added to connect with the bottom of the circuit board. The spring sheet is used to cooperate with the shell to support the tail of the circuit board, and supports the circuit board together with the connector to further prevent the circuit board from loosening;

[0029] The utility model adds a limit block with a threaded connection at the end of the connecting rod, and the limit block can limit the circuit board to prevent the circuit board from loosening from the end of the connecting rod. The limit block is screwed downward so that the limit block cooperates with the circuit board to pull the connecting rod, and the spring sheet is further pulled by the connecting rod to make the spring sheet shrink inward, so that the distance between the bottom of the spring sheet and the bottom of the circuit board is reduced, so that the position of the circuit board can be easily adjusted and the circuit board can be supported in cooperation with the end connecting piece; a stop block is added inside the shell to cooperate with the spring sheet, and the middle slide groove of the stop block can limit the spring sheet, keep the component installed on the upper end of the spring sheet moving back and forth at a specific position, prevent the circuit board component from loosening, and reduce the influence of external vibration and other factors on the circuit board components. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0031] Figure 2 It is a side structural schematic diagram of the utility model;

[0032] Figure 3 This is a schematic diagram of the internal component structure of the utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the circuit board of the utility model when it is completely installed inside the housing;

[0034] Figure 5 The figure is a schematic diagram of the complete sensor structure of the utility model.

[0035] Legend: 100, outer shell component; 101, shell; 102, front cover; 103, tail cover; 104, stopper; 105, wire; 200, sensing component; 201, circuit board; 202, probe; 203, connector; 204, spring; 205, connecting rod; 206, limit block; 207, positioning column; 208, rubber sleeve. DETAILED DESCRIPTION

[0036] The present invention will now be further described in detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0037] Reference Figure 1-5 As shown, the utility model provides a technical solution: a high-pressure resistant proximity sensor, comprising a shell component 100 and a sensing component 200, wherein the shell component 100 comprises a housing 101, a front cover 102 and a tail cover 103, wherein the front cover 102 is plugged into the end of the housing 101, a receiving cavity structure is provided inside the front cover 102, and the tail cover 103 is threadedly connected to the tail of the housing 101;

[0038] The sensing component 200 includes a circuit board 201, a probe 202, a connector 203 and a spring 204, wherein the connector 203 is movably inserted into the shell 101, one end of the circuit board 201 is fixedly connected to the connector 203, and the other end of the circuit board 201 is fixedly connected to the spring 204, the probe 202 is installed at the end of the circuit board 201, and the probe 202 is electrically connected to the circuit board 201, and the end of the probe 202 is inserted into the center position of the end of the shell 101, and the probe 202 is located on the inner wall of the front cover 102. Specifically, the shell component 100 composed of the shell 101, the front cover 102 and the tail cover 103 is added to protect the sensing component 200, wherein the shell 101 is used to cooperate with the installation of various components to prevent the components from loosening, and the front cover 102 and the tail cover 103 are used to close the shell 101 and maintain the shell The internal environment of 101 is stable, and the influence of the external environment on the sensing component 200 is reduced. The sensing component 200 composed of the circuit board 201, the probe 202, the connector 203 and the spring 204 is used to monitor the target area. The probe 202 is connected to the front cover 102, and the front cover 102 is used to protect the probe 202. The probe 202 is packaged at the end of the shell 101 to ensure the stability of the detection environment of the probe 202. The circuit board 201 is used to power the probe 202 and transmit data. The connector 203 is used to cooperate with the shell 101 to install the circuit board 201, maintain the stability of the position of the circuit board 201, and facilitate the connection between the circuit board 201 and the probe 202. At the same time, the spring 204 is added to connect with the bottom of the circuit board 201. The spring 204 is used to cooperate with the shell 101 to support the tail of the circuit board 201, and support the circuit board 201 together with the connector 203 to further prevent the circuit board 201 from loosening.

[0039] Reference Figure 1 and Figure 3 As shown, in the present embodiment: the front cover 102 is a can-shaped structure, the side wall of the end of the front cover 102 is provided with a side strip matching the inner wall of the end of the shell 101, and the front cover 102 is sealed and installed on the inner side of the end of the shell 101. Specifically, the side wall of the can-shaped front cover 102 can simultaneously increase the groove shape to buffer the pressure, improve the structural strength of the front cover 102, protect the probe 202 components, and provide higher sealing pressure resistance under high pressure to prevent the probe 202 from being damaged by pressure.

[0040] Reference Figure 3 and Figure 4As shown, in the present embodiment: the inner side wall at the end of the shell 101 is provided with a side strip structure matching the side wall of the front cover 102, and the probe 202 is located on the inner side of the side strip structure. Specifically, the side strip structure is provided on the inner wall of the shell 101, which can limit and guide the probe 202, facilitate the docking of the probe 202 with the front cover 102, ensure the docking accuracy between the probe 202 and the front cover 102, prevent the probe 202 from shaking, improve the strength of the side wall of the shell 101, and protect the side wall of the probe 202.

[0041] Reference Figure 3 and Figure 4 As shown, in the present embodiment: a through hole structure is provided in the middle position of the other end of the circuit board 201, a connecting rod 205 is fixedly installed in the middle position of the spring piece 204, and the end of the connecting rod 205 is inserted in the middle of the through hole at the other end of the circuit board 201. Specifically, a through hole structure is added in the middle of the circuit board 201 to facilitate the connecting rod 205 installed in the middle of the connecting rod 205 to pass through the circuit board 201, and the spring piece 204 is limited by the circuit board 201 and the connecting rod 205 to prevent the spring piece 204 from shaking left and right and affecting the stability of the position of the components of the circuit board 201.

[0042] Reference Figure 3 and Figure 4 As shown, in this embodiment: the top of the connecting rod 205 is threadedly connected to a limiting block 206, and the limiting block 206 is located on the upper end surface of the circuit board 201. The limiting block 206 does not contact the surface elements of the circuit board 201. Specifically, a threaded limiting block 206 is added to the end of the connecting rod 205, and the limiting block 206 can limit the circuit board 201 to prevent the circuit board 201 from loosening from the end of the connecting rod 205. The limiting block 206 is screwed downward so that the limiting block 206 cooperates with the circuit board 201 to pull the connecting rod 205, and the spring piece 204 is further pulled by the connecting rod 205, so that the spring piece 204 shrinks inward, so that the distance between the bottom of the spring piece 204 and the bottom of the circuit board 201 is reduced, so that the position of the circuit board 201 can be easily adjusted, and the circuit board 201 can be supported in cooperation with the end connector 203.

[0043] Reference Figure 3 and Figure 4 As shown, in the present embodiment: a stopper 104 is provided on one side of the shell 101, a slide groove structure is provided in the middle of the stopper 104, and the lower end of the spring piece 204 is in sliding contact with the middle slide groove of the stopper 104. Specifically, a stopper 104 is added inside the shell 101 to cooperate with the spring piece 204, and the middle slide groove of the stopper 104 can limit the spring piece 204, keep the component installed on the upper end of the spring piece 204 moving back and forth at a specific position, prevent the circuit board 201 component from loosening, and reduce the influence of external vibration and other factors on the circuit board 201 components.

[0044] Reference Figure 3 As shown, in the present embodiment: the lower end of the spring piece 204 is provided with an arc-shaped edge structure, and one end of the middle slide groove of the block 104 is provided with a limiting groove structure matching the arc-shaped edge of the end of the spring piece 204. Specifically, the arc-shaped edge structure is added to the lower end of the spring piece 204. When the spring piece 204 moves to the end of the middle slide groove of the block 104, the arc-shaped edge of the lower end of the spring piece 204 can be clamped on the inner side of the slide groove of the block 104, which plays a certain limiting role on the spring piece 204, further maintains the stability of the position of the spring piece 204 assembly, and facilitates the disassembly and assembly of the spring piece 204 assembly.

[0045] Reference Figure 3 As shown, in this embodiment: a wire 105 is sealed and plugged in the middle of the tail cover 103, and the end of the wire 105 is electrically connected to the circuit board 201. Specifically, the wire 105 is installed in the middle of the tail cover 103 to connect with the circuit board 201, so as to facilitate the power supply and signal transmission of the circuit board 201 and the probe 202 components, and maintain the stable operation of the circuit board 201 and the probe 202.

[0046] Reference Figure 3 and Figure 4 As shown, in this embodiment: the side wall of the connector 203 is provided with an arc-shaped edge structure matching the inner wall of the shell 101, the middle side wall of the connector 203 is provided with a positioning column 207 matching the positioning hole at the end of the circuit board 201, and the end of the positioning column 207 is inserted in the middle of the positioning hole at the end of the circuit board 201. Specifically, the side wall of the connector 203 is provided with an arc-shaped edge to dock with the shell 101, which is convenient for installing the connector 203 into the shell 101, and the side wall of the connector 203 can better fit with the inner wall of the shell 101 to maintain the stability of the circuit board 201 component installed on the side wall of the connector 203. The positioning column 207 is added to the side wall of the connector 203, and the positioning hole at the end of the circuit board 201 is put on the positioning column 207. The circuit board 201 can be limited by the connector 203 to keep the end of the circuit board 201 always docked with the connector 203 to prevent the circuit board 201 from loosening.

[0047] Reference Figure 4 As shown, in the present embodiment: the upper end of the positioning column 207 is sleeved with a rubber sleeve 208, and the rubber sleeve 208 is located on the upper end surface of the circuit board 201. Specifically, the rubber sleeve 208 is installed on the top of the positioning column 207. The rubber sleeve 208 can limit the circuit board 201 to prevent the end of the circuit board 201 from loosening from the side wall of the connector 203, thereby maintaining the stability of the connection structure between the circuit board 201 and the connector 203, and facilitating the installation of the circuit board 201 into the interior of the housing 101.

[0048] Structural principle: When in use, first install the positioning column 207 on the side wall of the connecting piece 203, then connect the positioning hole at the end of the circuit board 201 with the positioning column 207, connect one end of the main board 201 with the connecting piece 203, and then put the rubber sleeve 208 on the positioning column 207 to prevent the end of the circuit board 201 from loosening, then install the spring 204 at the tail of the circuit board 201, and fix the connecting rod 205 in the middle of the spring 204, and insert it into the through hole at the tail of the circuit board 201, and screw the upper limit block 206 on the end of the connecting rod 205 , and screw it downward so that the limit block 206 is limited by the circuit board 201, and the connecting rod 205 is pulled upward to make the spring piece 204 shrink upward, and the extended length of the spring piece 204 is adjusted to facilitate the cooperation with the connecting piece 203 to support the circuit board 201, and then the connecting piece 203 is inserted into the shell 101, and the circuit board 201 is pushed inward along the shell 101, and the lower end of the spring piece 204 is guided to be inserted into the shell 101 until the circuit board 201 is completely installed in the shell 101, and then other components are installed, and the sealing operation is completed.

[0049] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances;

[0050] The above description only describes the specific implementation methods of the utility model. Various examples do not limit the essential content of the utility model. Ordinary technicians in the relevant technical field can modify or deform the specific implementation methods described above after reading the description without departing from the essence and scope of the invention.

Claims

1. A high-voltage proximity sensor, comprising a housing component (100) and a sensing component (200), characterized in that: The housing component (100) comprises a housing (101), a front cover (102) and a tail cover (103); the front cover (102) is plugged into the end of the housing (101); a receiving cavity structure is provided inside the front cover (102); and the tail cover (103) is threadedly connected to the tail of the housing (101); The sensing component (200) comprises a circuit board (201), a probe (202), a connecting piece (203) and a spring piece (204); the connecting piece (203) is movably plugged into the interior of the housing (101); one end of the circuit board (201) is fixedly connected to the connecting piece (203); the other end of the circuit board (201) is fixedly connected to the spring piece (204); the probe (202) is mounted at the end of the circuit board (201); the probe (202) is electrically connected to the circuit board (201); the end of the probe (202) is plugged into the center position of the end of the housing (101); and the probe (202) is located on the inner wall of the front cover (102).

2. The high-voltage proximity sensor according to claim 1, characterized in that: The front cover (102) is a can-shaped structure. The end side wall of the front cover (102) is provided with a side strip matching the inner side wall of the end of the shell (101). The front cover (102) is sealed and installed on the inner side of the end of the shell (101).

3. The high-voltage proximity sensor according to claim 1, characterized in that: The inner side wall of the end of the shell (101) is provided with a side strip structure matching the side wall of the front cover (102), and the probe (202) is located inside the side strip structure.

4. The high-voltage proximity sensor according to claim 1, characterized in that: A through hole structure is provided in the middle of the other end of the circuit board (201), a connecting rod (205) is fixedly installed in the middle of the spring sheet (204), and the end of the connecting rod (205) is inserted in the middle of the through hole at the other end of the circuit board (201).

5. The high-voltage proximity sensor according to claim 4, characterized in that: The top of the connecting rod (205) is threadedly connected to a limit block (206); the limit block (206) is located on the upper end surface of the circuit board (201); and the limit block (206) does not contact the surface components of the circuit board (201).

6. The high-voltage proximity sensor according to claim 1, characterized in that: A stopper (104) is provided on one side of the interior of the housing (101), a sliding groove structure is provided in the middle of the stopper (104), and the lower end of the spring sheet (204) is in sliding contact with the sliding groove in the middle of the stopper (104).

7. The high-voltage proximity sensor according to claim 6, characterized in that: The lower end of the spring sheet (204) is provided with an arc-shaped edge structure, and one end of the middle sliding groove of the stopper (104) is provided with a limiting groove structure matching the arc-shaped edge of the end of the spring sheet (204).

8. The high-voltage proximity sensor according to claim 1, characterized in that: A wire (105) is sealed and plugged into the middle of the tail cover (103), and the end of the wire (105) is electrically connected to the circuit board (201).

9. The high-voltage proximity sensor according to claim 1, characterized in that: The side wall of the connecting piece (203) is provided with an arc-shaped edge structure matching the inner side wall of the shell (101), and the middle side wall of the connecting piece (203) is provided with a positioning column (207) matching the end positioning hole of the circuit board (201), and the end of the positioning column (207) is inserted in the middle of the end positioning hole of the circuit board (201).

10. The high-voltage proximity sensor according to claim 9, characterized in that: The upper end of the positioning column (207) is sleeved with a rubber sleeve (208), and the rubber sleeve (208) is located on the upper end surface of the circuit board (201).

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