Sealing structure of automobile sensor

Abstract

The utility model relates to the technical field of automobile sensors, in particular to a sealing structure of an automobile sensor, which comprises a mounting tube, a thermistor is arranged in the mounting tube, and the top of the mounting tube is fixedly connected with a first protective shell. Compared with the prior art, through the cooperation of the sealing ring, the limiting ring and the elastic cushion, the sealing ring can effectively wrap and protect the outer wall of the outgoing line, and when the outgoing line is dragged or shaken due to bumping and the like in the automobile driving process, the limiting ring can be driven to move synchronously, so that the safety of the outgoing line is improved, and the service life of the outgoing line is prolonged. The limiting ring abuts against the elastic pad when moving, so that the connecting position of the outgoing line and the limiting shell is always in a sealed state, glue sealing is not used, the sealed position is not prone to falling off when the sensor is used for a long time and is in a high-temperature state, the sealing performance of the sensor is improved, dust and the like are not prone to entering the sensor, and the service life of the sensor is prolonged. And the service life of the sensor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile sensors, in particular to a sealing structure of an automobile sensor. Background Art

[0002] The automotive sensor is the input device of the automotive computer system. It converts various operating information of the vehicle, such as vehicle speed, temperature of various media, engine operating conditions, etc., into electrical signals and transmits them to the computer so that the engine is in the best working state. According to the function of the sensor, automotive sensors can be classified into sensors with functions such as measuring temperature, pressure, flow, position, gas concentration, speed, brightness, dryness and humidity, and distance. The function of the automotive exhaust temperature sensor is to detect the exhaust temperature when the automobile engine is at high speed and high temperature, and transmit the exhaust temperature at this time to the automotive microcontroller to judge the various working conditions of the engine.

[0003] In the prior art, a Chinese patent with a patent publication number of CN215170297U discloses an automobile exhaust temperature sensor, which belongs to the field of sensors and includes a shell, a detection head is fixedly installed on the lower end surface of the shell, a threaded joint is fixedly installed on the side of the shell, a bracket is fixedly installed on the upper end surface of the threaded joint, a push piece is fixedly installed on the end of the bracket, a reinforcing rod is fixedly installed on the side of the push piece, the side of the reinforcing rod is fixedly installed on the side of the shell, a lead wire is slidably connected to the upper end of the interior of the shell, the lower end surface of the lead wire contacts the side of a sealing ring fixedly installed on the inner side of the shell, a sealing ring is fixedly installed on the side of the end of the lead wire, and the side of the sealing ring contacts the inner side of the shell. When the above-mentioned automobile temperature sensor is in use, the gap between the lead wire and the shell is sealed by a sealing ring and a sealing ring, and then the lead wire and the shell are fixed together with a sealant. In actual use, the vehicle will vibrate while driving on the road, and the lead wire may shake. Long-term shaking of the lead wire will cause the sealant to loosen. In addition, when the exhaust temperature is detected, it is kept at a high temperature for a long time, and the sealant may melt, causing the sealant to lose its sealing effect, which will still affect the sealing between the lead wire and the shell. Therefore, we disclose a sealing structure of an automobile sensor to meet the needs. Utility Model Content

[0004] In view of this, the purpose of the utility model is to propose a sealing structure for an automobile sensor to solve the problem in the prior art that, when the sensor detects the exhaust temperature, it is in a high temperature state for a long time, and the sealant used to seal between the lead wire and the shell may melt, causing the sealant to lose its sealing effect.

[0005] Based on the above purpose, the utility model provides a sealing structure of an automobile sensor, including a mounting tube, a thermistor is arranged in the mounting tube, a first protective shell is fixedly connected to the top of the mounting tube, a second protective shell is fixedly connected to the top of the first protective shell, a lead wire is arranged in the mounting tube, and the lead wire passes through the first protective shell and the second protective shell; a sealing assembly is arranged on the second protective shell, and the sealing assembly is used to seal the connection between the second protective shell and the lead wire, and the sealing assembly is connected to the second protective shell; an auxiliary fixing assembly is arranged on the outer wall of the first protective shell, and the auxiliary fixing assembly is used to auxiliary fix the mounting tube.

[0006] Preferably, the sealing assembly includes a fixing ring fixedly connected to the first protective shell, the inner wall of the fixing ring fits with the outer wall of the lead-out wire, the top of the second protective shell is fixedly connected to a mounting shell, the outer wall of the lead-out wire is sleeved with a sealing sleeve, the sealing sleeve is arranged inside the mounting shell, the sealing sleeve and the mounting shell are both provided with heat dissipation holes, the outer wall of the lead-out wire is sleeved with a sealing ring, the top of the sealing sleeve is fixedly connected to the mounting sleeve, the top of the mounting shell is fixedly connected to a connecting ring, one side of the mounting sleeve is fixedly connected to the top of the connecting ring, the outer wall of the sealing ring is fixedly connected to a limiting ring, the top of the mounting sleeve is fixedly connected to the limiting shell, the inner wall of the limiting shell is fixedly connected to an elastic pad, and the outer wall of the limiting ring is fixedly connected to the inner wall of the elastic pad.

[0007] Preferably, the auxiliary fixing assembly includes auxiliary fixing plates fixedly connected to both sides of the outer wall of the first protective shell, each of the auxiliary fixing plates is threadedly connected to a support rod, one end of the support rod is fixedly connected to a handle, and the other end of the support rod is fixedly connected to an adhesive block.

[0008] Preferably, the elastic pad is made of elastic cotton.

[0009] Preferably, the fixing ring is made of rubber, and the fixing ring is clamped and fixed to the second protective shell.

[0010] Preferably, a plurality of anti-slip grooves are provided on the handle.

[0011] Preferably, the heat dissipation hole has an S-shaped structure.

[0012] Preferably, the bottom of the limiting shell is fixedly connected to the top of the mounting sleeve by welding.

[0013] Preferably, the first protective shell and the second protective shell are both made of high-temperature resistant plastic material, and the first protective shell and the second protective shell are fixedly connected by hot-melt welding.

[0014] Preferably, the mounting sleeve is in an L-shaped structure, and the mounting sleeve is made of metal.

[0015] Beneficial effects of the utility model:

[0016] Through the cooperation of the set sealing ring, limit ring and elastic pad, when in use, the operator can install the installation tube to the exhaust pipe of the automobile. The set sealing ring can effectively wrap and protect the outer wall of the lead-out wire. When the automobile is bumpy during driving, the lead-out wire will be pulled or shaken, which can drive the limit ring to move synchronously. The limit ring abuts against the elastic pad when moving. The elastic pad has a certain elasticity, so that the connection between the lead-out wire and the limit shell is always in a sealed state. No glue is used for sealing, so that the seal will not fall off easily when the sensor is used for a long time in a high temperature state, thereby improving the sealing performance of the sensor, making it difficult for dust to enter the inside of the sensor, etc., thereby improving the service life of the sensor.

[0017] By setting the fixing ring and the sealing sleeve, when in use, the setting fixing ring can protect the connection between the lead wire and the second protective shell, so that the lead wire will not be scratched by the second protective shell when it shakes or is pulled during use. At the same time, the setting sealing sleeve can fill the outer wall of the lead wire and the inner wall of the mounting shell, so that there is no gap between the outer wall of the lead wire and the inner wall of the mounting shell. When the setting mounting sleeve is installed on the limit shell, the setting can fill the outer wall of the sealing ring and the inner wall of the mounting shell, avoiding dust from entering through the gap, improving the sealing of the connection between the lead wire and the mounting shell, and further improving the sealing performance of the sensor.

[0018] By providing the support rod and the adhesive block, when in use, after the sensor is installed, the user can turn the handle to drive the support rod and the adhesive block to rotate synchronously, tear off the protective film on the connecting ring to expose the adhesive surface, and when the adhesive block is rotated to abut against the surface of the automobile exhaust pipe, it is adhered and fixed thereto, thereby achieving an auxiliary fixation effect on the mounting tube and the first protective shell. When exhaust is discharged from the exhaust pipe or shaking occurs during driving of the automobile, the stability performance of the entire sensor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2It is a schematic diagram of a partially cutaway structure of the utility model;

[0022] Figure 3 A partially cutaway three-dimensional structural diagram of the second protective shell, lead wires and fixing ring assembly;

[0023] Figure 4 A schematic diagram of a partially cut-away side view of the assembly of a lead-out wire, a mounting shell, a sealing sleeve, a sealing ring, a mounting sleeve, a connecting ring, an elastic pad and a limiting shell;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the sealing ring, the limiting shell, the limiting ring and the elastic pad assembly;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the lead-out wire, the installation sleeve, the sealing sleeve, the sealing ring and the limit ring assembly;

[0026] Figure 7 This is a schematic diagram of the partially cutaway three-dimensional structure of the lead wire, sealing sleeve and mounting shell assembly.

[0027] The markings in the figure are:

[0028] 1. Mounting tube; 2. First protective shell; 3. Second protective shell; 4. Lead wire; 5. Fixing ring; 6. Mounting shell; 7. Sealing sleeve; 8. Connecting ring; 9. Mounting sleeve; 10. Sealing ring; 11. Limiting shell; 12. Limiting ring; 13. Elastic pad; 14. Heat dissipation hole; 15. Auxiliary fixing plate; 16. Support rod; 17. Handle; 18. Adhesive block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] like Figure 1-Figure 7 As shown, a sealing structure of an automobile sensor comprises a mounting tube 1, a thermistor is arranged in the mounting tube 1, a first protective shell 2 is fixedly connected to the top of the mounting tube 1, a second protective shell 3 is fixedly connected to the top of the first protective shell 2, a lead-out line 4 is arranged in the mounting tube 1, and the lead-out line 4 passes through the first protective shell 2 and the second protective shell 3; a sealing assembly is arranged on the second protective shell 3, the sealing assembly is used to seal the connection between the second protective shell 3 and the lead-out line 4, the sealing assembly is connected to the second protective shell 3, the sealing assembly comprises a fixing ring 5 fixedly connected to the first protective shell 2, the inner wall of the fixing ring 5 is in contact with the outer wall of the lead-out line 4, the top of the second protective shell 3 is fixedly connected to the mounting shell 6, the outer wall of the lead-out line 4 is sleeved with a sealing sleeve 7, the sealing sleeve 7 is arranged inside the mounting shell 6, and the sealing sleeve 7 Heat dissipation holes 14 are provided on the sealing sleeve 7 and the mounting shell 6. The sealing sleeve 7 is made of rubber material, and the outer wall of the lead-out wire 4 and the inner wall of the mounting shell 6 are filled so that there is no gap between the outer wall of the lead-out wire 4 and the inner wall of the mounting shell 6. The outer wall of the lead-out wire 4 is sleeved with a sealing ring 10, and the top of the sealing sleeve 7 is fixedly connected to the mounting sleeve 9, and the top of the mounting shell 6 is fixedly connected to the connecting ring 8, one side of the mounting sleeve 9 is fixedly connected to the top of the connecting ring 8, the outer wall of the sealing ring 10 is fixedly connected to the limiting ring 12, and the top of the mounting sleeve 9 is fixedly connected to the limiting shell 11, the inner wall of the limiting shell 11 is fixedly connected to the elastic pad 13, and the outer wall of the limiting ring 12 is fixedly connected to the inner wall of the elastic pad 13; the outer wall of the first protective shell 2 is provided with an auxiliary fixing component, and the auxiliary fixing component is used to auxiliary fix the mounting tube 1.

[0032] Through the cooperation of the set sealing ring 10, the limit ring 12 and the elastic pad 13, when in use, the operator can install the installation tube 1 to the exhaust pipe of the automobile. The set sealing ring 10 can effectively wrap and protect the outer wall of the lead-out line 4. When the automobile is bumpy during driving, the lead-out line 4 will be pulled or shaken, which can drive the limit ring 12 to move synchronously. The limit ring 12 abuts against the elastic pad 13 when moving. The elastic pad 13 has a certain elasticity, so that the connection between the lead-out line 4 and the limit shell 11 is always in a sealed state. No glue is used for sealing, so that when the sensor is in a high temperature state during long-term use, the seal will not fall off easily, thereby improving the sealing performance of the sensor, making it difficult for dust to enter the inside of the sensor, etc., thereby improving the service life of the sensor.

[0033] By setting the fixing ring 5 and the sealing sleeve 7, when in use, the setting fixing ring 5 can protect the connection between the lead wire 4 and the second protective shell 3, so that the lead wire 4 will not be scratched by the second protective shell 3 when it shakes or is pulled during use. At the same time, the setting sealing sleeve 7 can fill the outer wall of the lead wire 4 and the inner wall of the mounting shell 6, so that there is no gap between the outer wall of the lead wire 4 and the inner wall of the mounting shell 6. When the setting mounting sleeve 9 is installing the limit shell 11, it can fill the outer wall of the sealing ring 10 and the inner wall of the mounting shell 6, thereby avoiding dust from entering through the gap, improving the sealing of the connection between the lead wire 4 and the mounting shell 6, and further improving the sealing performance of the sensor.

[0034] like Figure 1-Figure 7 As shown, the auxiliary fixing assembly includes auxiliary fixing plates 15 fixedly connected to both sides of the outer wall of the first protective shell 2, each auxiliary fixing plate 15 is threadedly connected to a support rod 16, one end of the support rod 16 is fixedly connected to a handle 17, and the other end of the support rod 16 is fixedly connected to an adhesive block 18.

[0035] By providing the support rod 16 and the adhesive block 18, when in use, after the sensor is installed, the user can rotate the handle 17 to drive the support rod 16 and the adhesive block 18 to rotate synchronously, tear off the protective film on the connecting ring 8 to expose the adhesive surface, and when the adhesive block 18 is rotated to abut against the surface of the automobile exhaust pipe, it is adhered and fixed thereto, thereby achieving an auxiliary fixation effect on the mounting tube 1 and the first protective shell 2. When exhaust is discharged from the exhaust pipe and shaking occurs during driving of the automobile, the stability performance of the entire sensor is improved.

[0036] like Figure 5 As shown, the elastic pad 13 is made of elastic cotton material, which is convenient for installing the elastic pad 13. When the lead wire 4 is pulled or shaken, it can drive the limit ring 12 to move synchronously. The limit ring 12 abuts against the elastic pad 13 when moving. The elastic pad 13 has a certain elasticity, so that the connection between the lead wire 4 and the limit shell 11 is always in a sealed state.

[0037] like Figure 3 As shown, the fixing ring 5 is made of rubber, and the fixing ring 5 is clamped and fixed to the second protective shell 3, so as to protect the lead wire 4, so that the lead wire 4 will not be scratched by the second protective shell 3 when it shakes or is pulled during use.

[0038] like Figure 1 As shown, the handle 17 is provided with a plurality of anti-skid grooves, and the anti-skid grooves can increase the friction between the user's hand and the handle 17 so that the user will not slip when turning the handle 17 .

[0039] like Figure 7As shown, the heat dissipation hole 14 has an S-shaped structure. The heat dissipation hole 14 can disperse the heat generated by the lead wire 4 during use, and the S-shaped structure makes it difficult for external dust to enter the sensor along the heat dissipation hole 14, so that the sensor always remains sealed during use.

[0040] like Figure 2 and Figure 4 As shown, the bottom of the limiting shell 11 is fixedly connected to the top of the mounting sleeve 9 by welding, and the welding method has a better fixing effect, so that during the use of the sensor, the connection between the mounting sleeve 9 and the limiting shell 11 will not be damaged, resulting in a decrease in the sealing effect of the sensor.

[0041] like Figure 1 As shown, the first protective shell 2 and the second protective shell 3 are both made of high-temperature resistant plastic material. The first protective shell 2 and the second protective shell 3 are fixedly connected by hot-melt welding. Hot-melt welding has a better fixing effect. The use of high-temperature resistant plastic material is inexpensive and can reduce production costs. At the same time, the first protective shell 2 and the second protective shell 3 will not melt due to long-term high-temperature regulation during use, thereby improving the service life of the first protective shell 2 and the second protective shell 3.

[0042] like Figure 2 As shown, the mounting sleeve 9 is L-shaped and is made of metal, preferably stainless steel, which can fill the outer wall of the sealing ring 10 and the inner wall of the mounting shell 6, thereby preventing dust from entering through the gap and improving the sealing of the connection between the lead wire 4 and the mounting shell 6.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0044] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A sealing structure for an automobile sensor, comprising a mounting tube (1), characterized in that: A thermistor is arranged in the installation tube (1); a first protective shell (2) is fixedly connected to the top of the installation tube (1); a second protective shell (3) is fixedly connected to the top of the first protective shell (2); a lead wire (4) is arranged in the installation tube (1); the lead wire (4) passes through the first protective shell (2) and the second protective shell (3); The second protective shell (3) is provided with a sealing component, the sealing component is used to seal the connection between the second protective shell (3) and the lead wire (4), and the sealing component is connected to the second protective shell (3); The outer wall of the first protective shell (2) is provided with an auxiliary fixing component, and the auxiliary fixing component is used to assist in fixing the mounting tube (1).

2. The sealing structure of the automobile sensor according to claim 1, characterized in that: The sealing assembly comprises a fixing ring (5) fixedly connected to the first protective shell (2), the inner wall of the fixing ring (5) is in contact with the outer wall of the lead wire (4), the top of the second protective shell (3) is fixedly connected to a mounting shell (6), the outer wall of the lead wire (4) is sheathed with a sealing sleeve (7), the sealing sleeve (7) is arranged inside the mounting shell (6), the sealing sleeve (7) and the mounting shell (6) are both provided with heat dissipation holes (14), and the outer wall of the lead wire (4) is sheathed with a sealing ring (10) The top of the sealing sleeve (7) is fixedly connected to a mounting sleeve (9), the top of the mounting shell (6) is fixedly connected to a connecting ring (8), one side of the mounting sleeve (9) is fixedly connected to the top of the connecting ring (8), the outer wall of the sealing ring (10) is fixedly connected to a limiting ring (12), the top of the mounting sleeve (9) is fixedly connected to a limiting shell (11), the inner wall of the limiting shell (11) is fixedly connected to an elastic pad (13), and the outer wall of the limiting ring (12) is fixedly connected to the inner wall of the elastic pad (13).

3. The sealing structure of the automobile sensor according to claim 1, characterized in that: The auxiliary fixing assembly comprises auxiliary fixing plates (15) fixedly connected to two sides of the outer wall of the first protective shell (2), each of the auxiliary fixing plates (15) being threadedly connected to a support rod (16), one end of the support rod (16) being fixedly connected to a handle (17), and the other end of the support rod (16) being fixedly connected to an adhesive block (18).

4. The sealing structure of the automobile sensor according to claim 2, characterized in that: The elastic pad (13) is made of elastic cotton.

5. The sealing structure of the automobile sensor according to claim 2, characterized in that: The fixing ring (5) is made of rubber material, and the fixing ring (5) is fixedly connected to the second protective shell (3) by snapping.

6. The sealing structure of the automobile sensor according to claim 3, characterized in that: The handle (17) is provided with a plurality of anti-slip grooves.

7. The sealing structure of the automobile sensor according to claim 2, characterized in that: The heat dissipation hole (14) has an S-shaped structure.

8. The sealing structure of the automobile sensor according to claim 2, characterized in that: The bottom of the limiting shell (11) and the top of the mounting sleeve (9) are fixedly connected by welding.

9. The sealing structure of the automobile sensor according to claim 1, characterized in that: The first protective shell (2) and the second protective shell (3) are both made of high-temperature resistant plastic material, and the first protective shell (2) and the second protective shell (3) are fixedly connected by hot-melt welding.

10. The sealing structure of the automobile sensor according to claim 2, characterized in that: The installation sleeve (9) is in an L-shaped structure, and the material of the installation sleeve (9) is metal.

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