High-sensitivity automobile oxygen sensor

Abstract

The invention relates to a high-sensitivity automobile oxygen sensor which comprises a mounting seat for fixing the oxygen sensor, and a protection piece for protecting a connecting wire is arranged at the top of the mounting seat; the protection piece comprises a longitudinally-arranged protection sleeve, an arc-shaped guide pipe arranged at the top end of the protection sleeve and a connector for connecting the protection sleeve and the arc-shaped guide pipe, the protection sleeve is fixed to the upper end face of the mounting base and communicates with the interior of the mounting base, and a fixing piece for fixing a connecting line is arranged in the protection sleeve; the end, away from the protective sleeve, of the arc-shaped guide pipe inclines downwards, the connector comprises a vertical section connected with the protective sleeve and an arc-shaped section connected with the arc-shaped guide pipe, and the vertical section and the arc-shaped section are in smooth transition. According to the oxygen sensor, the longitudinally arranged protective sleeve and the arc-shaped guide pipe are adopted to guide and protect the connecting position of the connecting line and the oxygen sensor and the position needing to be bent downwards, the bending phenomenon is avoided, and therefore the situation that the oxygen sensor is damaged or even broken is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of oxygen sensors, and in particular to a high-sensitivity automotive oxygen sensor. Background Art

[0002] Currently, automotive oxygen sensors are key feedback sensors in electronic fuel injection engine control systems. They are crucial components for controlling vehicle exhaust emissions, reducing environmental pollution, and improving fuel combustion quality. Oxygen sensors are typically installed in the engine exhaust pipe. However, after the oxygen sensor is installed in the engine, the connecting wire at the top bends downward, causing the connection wire to the oxygen sensor to bend. This can cause the connecting wire to break after prolonged use, affecting the sensitivity of the oxygen sensor.

[0003] Patent application number 202420881269.0 discloses a stable installation of an automotive oxygen sensor, including an automotive oxygen sensor and a wire. The rear end of the automotive oxygen sensor is electrically connected to the front of the wire. The rear of the wire is electrically connected to a connector. The outer wall of the connector is connected to a fixed structure. The left and right sides of the rear end face of the automotive oxygen sensor are respectively fixed with bent plates. One hand holds the second bent rod in the support structure, and the other hand holds the straight cylinder, so that the straight cylinder rotates through the right bent plate. The rotating straight cylinder moves the first bent rod backward, and the moving first bent plate moves the ring backward. At the same time, the second bent rod connected to the left side of the ring will move backward on the inner wall of the left bent plate. The ring will support the wire to prevent the wire from directly bending at the connection with the automotive oxygen sensor. Although the structure of this patent can protect the wire from bending at the connection between the wire and the oxygen sensor, the wire needs to connect the front oxygen sensor and the rear oxygen sensor, and it will still bend downward. Long-term bending here will also cause damage or even breakage.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there is a defect that the connecting wire may be broken or even ruptured due to long-term bending. Summary of the Invention

[0005] In order to solve the above technical problems, the present application provides a high-sensitivity automotive oxygen sensor.

[0006] This application provides a high-sensitivity automotive oxygen sensor, which adopts the following technical solutions: A high-sensitivity automotive oxygen sensor includes a mounting base for fixing the oxygen sensor, wherein a protective member for protecting a connecting line is provided on the top of the mounting base; the protective member includes a longitudinally arranged protective cover, an arcuate guide tube provided at the top of the protective cover, and a connector connecting the protective cover and the arcuate guide tube, the protective cover is fixed to the upper end surface of the mounting base and communicates with the interior of the mounting base, and a fixing member for fixing the connecting line is provided inside the protective cover; the arcuate guide tube is inclined downward at one end away from the protective cover, and the connector includes a vertical section connected to the protective cover and an arcuate section connected to the arcuate guide tube, with a smooth transition between the vertical section and the arcuate section.

[0007] By adopting the above technical solution, a longitudinally arranged protective cover and an arc-shaped guide tube are used to guide and protect the connection position between the connecting wire and the oxygen sensor and the position that needs to be bent downward, thereby avoiding bending and thus avoiding damage or even breakage.

[0008] Preferably, the fixing part includes a plurality of wiring harness clamps arranged on the inner wall of the protective cover in a linear array and a soft pad arranged on the inner wall of the wiring harness clamp; the wiring harness clamp includes two semicircular rings with openings arranged opposite to each other, the bottoms of the two semicircular rings are connected by a hinge shaft and fixed to the inner wall of the protective cover, and the two semicircular rings are buckled relative to each other to form a circular clamp, and the connecting wire is fixed in the circular clamp.

[0009] By adopting the above technical solution, a wiring harness clamp is provided to fix the connecting wire in the protective cover, thereby preventing the connecting wire from being pulled between the connecting wire and the oxygen sensor during engine operation, thereby preventing the wire from being damaged.

[0010] Preferably, a spring is sleeved on the outer wall of the hinge shaft, and when the two semicircular rings are in an open state or tend to be open, the spring gives the semicircular rings a pulling force to rebound and engage.

[0011] By adopting the above technical solution, since the vehicle will shake during driving, the two semicircular rings will open or tend to open. At this time, the connecting line will not be stable and may bend. Therefore, a spring is set on the hinge shaft. When the hinge shaft rotates, the hinge shaft rotates back to its original position under the action of the spring elastic force.

[0012] Preferably, the arc-shaped guide tube is formed by multiple sections of tubes with successively decreasing diameters that are socketed together. The outer wall of the inner tube body and the inner wall of the outer tube body of the two mutually socketed tube bodies are hinged, and the inner diameter of the tube body with the smallest diameter is adapted to the outer diameter of the connecting line.

[0013] By adopting the above technical solution, the arc-shaped guide tube is arranged into multiple mutually hinged tube bodies, and the angle between the two tube bodies can be adjusted, thereby adjusting the curvature of the arc-shaped guide tube, and then the downward tilt angle of the connecting line can be adjusted, and the connecting line will not bend during this process.

[0014] Preferably, the inner wall of the outer tube body of the two tube bodies that are socketed with each other is formed with a sliding groove and a hinge groove that are interconnected, and the hinge groove is located at the end of the outer tube body away from the protective cover, a hinge shaft is rotatably connected in the hinge groove, a hinge plate is fixedly connected to the hinge shaft, a clamping groove is formed on the top end surface of the hinge plate, and the end of the outer wall of the inner tube body protrudes downward to form a slider, and the slider is correspondingly engaged with the clamping groove or slides correspondingly with the sliding groove.

[0015] By adopting the above technical solution, the length and curvature adjustment of the arc guide tube can be switched. Since the hinge plate is clamped with the slider, when the slider is fixed to the hinge plate, the hinge shaft can be rotated to adjust the bending curvature between the two tube bodies. When the length of the arc guide tube needs to be adjusted, one of the tube bodies is pushed to push the slider on it out of the clamping groove, and then it is pushed to slide in the slide groove to retract it into the adjacent tube body.

[0016] Preferably, the mounting seat includes an arc-shaped plate, a protective box detachably connected to the arc-shaped plate, and a shock-absorbing structure arranged in the protective box. The arc-shaped plate is provided with a through hole, and the oxygen sensor is connected to the engine through the through hole. The shock-absorbing structure includes a plurality of spring rods connected to the inner wall of the protective box and a buffer plate connected to the end of the spring rod. The buffer plate is arc-shaped, and its concave surface is pressed against the outer wall of the oxygen sensor, and a buffer pad is provided on the concave surface.

[0017] By adopting the above technical solution, the arrangement of the arc plate can facilitate the connection between the box and the engine. During installation, the arc plate is welded to the engine, and a spring rod is arranged in the box, which can fix the oxygen sensor and play a shock-absorbing role at the same time, thereby preventing the shaking generated during the vehicle driving from causing damage to the oxygen sensor and affecting its sensitivity.

[0018] Preferably, part of the spring rod is connected to the middle part of the protection box and is arranged perpendicular to the axial direction of the oxygen sensor, and the remaining part is respectively connected to the top and bottom of the protection box and is arranged at an angle to the axial direction of the oxygen sensor.

[0019] By adopting the above technical solution and arranging the spring rods horizontally and obliquely, the oxygen sensor can be fixed with multiple degrees of freedom.

[0020] Preferably, the protective box includes a box body with two opening sides that are correspondingly snapped together, and the bottom end faces of the two box bodies are arc-shaped and adapted to the convex sides of the arc-shaped plate, and a card slot and a positioning slot are respectively provided on the two side walls of the box body opening, and a card block is provided in the card slot for positioning and engaging with the positioning slot correspondingly, and magnets are provided on the end face of the card block away from the positioning slot and the end face of the card slot opposite to the opening side, and the magnetic poles of the two magnets are the same; a through slot connected to the card slot is provided at the top of the card slot, and the through slot extends along the height of the box body, and a moving block is provided therein, and a push rod is connected to the bottom of the moving block, a push spring is wound around the outer wall of the push rod, and an inclined groove corresponding to the push rod and inclined downward is provided on the upper end face of the card block.

[0021] By adopting the above technical solution, the protection box is provided with two detachable boxes, so as to facilitate its fixation outside the oxygen sensor, which not only protects the oxygen sensor but also can fix it to the engine.

[0022] Preferably, at least one locking spring is connected to the inner wall of one of the boxes, and the other end of the locking spring is detachably connected to a corresponding position on the inner wall of the other box.

[0023] By adopting the above technical solution, a locking spring is connected between the inner walls of the two boxes in order to further fix the two boxes and prevent the two boxes from shaking apart when the engine shakes.

[0024] Preferably, a slot is provided on the top of the protection box for the connection line to pass through, and the protection cover is screwed to the slot.

[0025] By adopting the above technical solution, the protective cover is screwed to the slotted hole in order to fix the protective cover to the protective box, that is, to fix the oxygen sensor to the connecting wire, so that it is stably connected to the engine, and further protect the oxygen sensor and the connecting wire through its stable connection.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Use the longitudinally set protective cover and arc-shaped guide tube to connect the connecting wire and the oxygen sensor respectively. The position and the position that needs to be bent downward are guided and protected to avoid bending, thereby avoiding damage or even breakage.

[0027] 2. The wiring harness clamp can be set to fix the connecting wires in the protective cover to prevent the connecting wires from being pulled between the connecting wires and the oxygen sensor during engine operation, which may cause damage to the wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a structural schematic diagram of a high-sensitivity automobile oxygen sensor in the present invention.

[0029] Figure 2 It is a cross-sectional view of the protective cover of the present invention.

[0030] Figure 3 yes Figure 2 A magnified view of center.

[0031] Figure 4 It is a top view of the protective cover of the present invention.

[0032] Figure 5 It is a cross-sectional view of the arc-shaped guide tube in the present invention.

[0033] Figure 6 yes Figure 5 Magnified view of B.

[0034] Figure 7 It is a schematic structural diagram of the curved guide tube in the present invention after bending.

[0035] Figure 8 It is a cross-sectional view of the protection box of the present invention.

[0036] Figure 9 It is a cross-sectional view of the box connection structure in the present invention.

[0037] Figure 10 It is a top view of the protection box of the present invention.

[0038] Explanation of reference numerals: 1. mounting base; 11. curved plate; 12. protective box; 121. box body; 122. snap-fit groove; 123. positioning groove; 124. clamping block; 125. magnet; 126. through groove; 127. moving block; 128. push rod; 129. push spring; 130. inclined groove; 13. shock-absorbing structure; 131. spring rod; 132. buffer plate; 14. slot; 15. lock Tightening spring; 2. Oxygen sensor; 3. Connecting wire; 4. Protective part; 41. Protective cover; 42. Arc guide tube; 421. Tube body; 422. Slide groove; 423. Hinge groove; 424. Hinge shaft; 425. Hinge plate; 426. Snap groove; 427. Slider; 43. Connector; 44. Fixing part; 441. Wire harness clamp; 442. Cushion; 443. Hinge shaft; 444. Spring. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-10 This application is described in further detail.

[0040] The present application discloses a highly sensitive automotive oxygen sensor. Figure 1-10, including a mounting base 1 for fixing the oxygen sensor 2, a protective member 4 for protecting the connecting line 3 is provided on the top of the mounting base 1; the protective member 4 includes a longitudinally arranged protective cover 41, an arc-shaped guide tube 42 provided at the top of the protective cover 41, and a connector 43 connecting the protective cover 41 and the arc-shaped guide tube 42, the protective cover 41 is fixed to the upper end surface of the mounting base 1 and is connected to the interior of the mounting base 1, and a fixing member 44 for fixing the connecting line 3 is provided inside the protective cover 41; the end of the arc-shaped guide tube 42 away from the protective cover 41 is inclined downward, and the connector 43 includes a vertical section connected to the protective cover 41 and an arc-shaped section connected to the arc-shaped guide tube 42, and the vertical section and the arc-shaped section have a smooth transition.

[0041] In this embodiment, a mounting base 1 is provided to fix the oxygen sensor 2, and a protective cover 41 and an arc-shaped guide tube 42 are provided on the mounting base 1 to protect the connecting line 3. The protective cover 41 is vertically installed on the mounting base 1, so that the connecting line 3 at the end of the oxygen sensor 2 can be vertically fixed so that it is located on the same line as the central axis of the oxygen sensor 2, thereby protecting it from bending. The position of the connecting line 3 that needs to be bent is protected by the arc-shaped guide tube 42. Since the end of the arc-shaped guide tube 42 is tilted downward, it guides the connecting line 3 so that the connecting line 3 can bend downward without bending, and the connector 43 connects the protective cover 41 and the arc-shaped guide tube 42.

[0042] Specifically, the connector 43 adopts the setting of vertical segments and arc segments, connecting the vertical segment with the protective cover 41, such as by threaded connection, and connecting the arc segment with the arc guide tube 42, such as by threaded connection, and a structure similar to fillet is used between the vertical segment and the arc segment for smooth transition, thereby protecting the connecting line 3 from bending.

[0043] In some embodiments, please refer to Figure 2-Figure 4 The fixing part 44 includes a plurality of wire harness clamps 441 arranged in a linear array on the inner wall of the protective cover 41 and a soft pad 442 arranged on the inner wall of the wire harness clamp 441; the wire harness clamp 441 includes two semicircular rings with openings arranged opposite to each other, and the bottoms of the two semicircular rings are connected and fixed to the inner wall of the protective cover 41 through a hinge shaft 443, and the two semicircular rings are buckled relative to each other to form a circular clamp, and the connecting line 3 is fixed in the circular clamp.

[0044] In this embodiment, the semicircular rings are provided to fix the connecting wire 3. When in use, the connecting wire 3 is passed through the protective cover 41, and then the semicircular rings are buckled in turn. Since the two semicircular rings of the same harness clamp 441 are hinged, the two semicircular rings can be rotated toward each other to buckle and lock them.

[0045] Optionally, the radii of the two semicircular rings can be the same, or a radius difference can be set; and in order to adapt to connecting lines 3 with different radii, the radius difference between the two semicircular rings is set to half the thickness of the ring. During installation, one end of the two semicircular rings is connected by a hinge shaft 443, and for the other end, the semicircular ring with a smaller radius rotates toward the inner wall of the semicircular ring with a larger radius until its inner wall is tightly attached to the outer wall of the connecting line 3.

[0046] Specifically, the soft pad 442 is provided on the inner side of the semicircular ring to avoid direct contact between the protective cover 41 and the connecting line 3 , thereby protecting the connecting line 3 .

[0047] In some embodiments, a spring 444 is sleeved on the outer wall of the hinge shaft 443, and when the two semi-circular rings are in an open state or tend to be open, the spring 444 gives the semi-circular rings a pulling force to rebound and engage.

[0048] In this embodiment, when the two semicircular rings are fastened together, the spring 444 is at its original length. When the engine shakes, the wiring harness clamp 441 will be driven to shake through the protective cover 41, thereby shaking the two fastened semicircular rings apart, and the hinge shaft 443 will rotate and stretch the spring 444. The opening of the semicircular rings will cause the connecting line 3 to start shaking back and forth, and may bend. Therefore, at this time, the spring 444 will give the hinge shaft 443 a rotational pulling force to drive the hinge shaft 443 to return to its original position, so that the two semicircular rings are tightly fastened and the connecting line 3 continues to be fixed.

[0049] In some embodiments, please refer to Figure 5-Figure 7 The arc-shaped guide tube 42 is formed by multiple sections of tube bodies 421 with successively decreasing diameters that are socketed together. The outer wall of the inner tube body 421 of the two mutually socketed tube bodies 421 is hinged to the inner wall of the outer tube body 421, and the inner diameter of the tube body 421 with the smallest diameter is adapted to the outer diameter of the connecting line 3.

[0050] In this embodiment, the arc guide tube 42 is arranged to be a plurality of mutually hinged tube bodies 421, and the bending angle of the arc guide tube 42 can be adjusted by the hinge so that it can bend upward, downward or in multiple curves, so that it can meet the connection bending conditions of the connecting line 3.

[0051] Specifically, according to the specific connection conditions of the connecting line 3, the arc-shaped guide tube 42 can be in an arc-shaped state or a straight line state, as long as it can guide the connecting line 3 and avoid bending.

[0052] In some embodiments, the inner wall of the outer tube body 421 of the two tube bodies 421 that are socketed with each other is formed with a sliding groove 422 and a hinge groove 423 that are interconnected, and the hinge groove 423 is located at the end of the outer tube body 421 away from the protective cover 41, and a hinge shaft 424 is rotatably connected in the hinge groove 423, and a hinge plate 425 is fixedly connected to the hinge shaft 424, and a snap-fit groove 426 is formed on the top end face of the hinge plate 425, and the end of the outer wall of the inner tube body 421 protrudes downward to form a slider 427, and the slider 427 is correspondingly snapped with the snap-fit groove 426 or slides correspondingly with the sliding groove 422.

[0053] In this embodiment, the hinge groove 423 is provided in order to set the hinge shaft 424 therein to realize the bending between the two adjacent tube bodies 421. The hinge plate 425 is provided on the hinge shaft 424 to fix the slider 427. The hinge plate 425 and the fixed slider 427 are clamped together, that is, a trapezoidal groove is provided on the upper end surface of the hinge plate 425, and the slider 427 is clamped with the trapezoidal groove; according to the environment in which the engine is located and the connection position of the oxygen sensor 2, the position where the connecting line 3 bends downward is different, and therefore the required length of the arc guide tube 42 is also different. Based on this, a slide groove 422 is provided in the tube body 421, and the sliding of the slider 427 in the slide groove 422 can retract the tube body 421 with a smaller diameter back into the tube body 421 with a larger diameter, thereby realizing the adjustment of the length of the arc guide tube 42.

[0054] Specifically, since the gap between the two tubes 421 is small, the bending angle thereof is limited. Therefore, the length of each tube 421 can be reduced and the number of tubes 421 can be increased. By bending each tube 421 at a small angle, the large angle adjustment of the arc-shaped guide tube 42 can be achieved, such as Figure 7 As shown, the present invention takes four sections of tube body as an example; in addition, two hinge grooves 423 arranged opposite to each other up and down can be set in the tube body 421, so that it is stable when bending up and down.

[0055] Specifically, since the slider 427 is engaged with the hinge plate 425, and the slide groove 422 is connected to the hinge groove 423, pushing the tube body 421 can drive the slider 427 and the hinge plate 425 to slide out, and then slide into the slide groove 422. Similarly, pulling the tube body 421 in the opposite direction can fix the slider 427 and the hinge plate 425, thereby achieving the contraction of the tube body 421.

[0056] The cam 427 is pressed against the stop 428 and the spring 444 is pressed against the stop 429 to release the spring 445.

[0057] In some embodiments, please refer to Figure 1 、 Figure 8 The mounting base 1 includes an arc-shaped plate 11, a protective box 12 detachably connected to the arc-shaped plate 11, and a shock-absorbing structure 13 provided in the protective box 12. The arc-shaped plate 11 is provided with a through hole, and the oxygen sensor 2 is connected to the engine through the through hole. The shock-absorbing structure 13 includes a plurality of spring rods 131 connected to the inner wall of the protective box 12 and a buffer plate 132 connected to the end of the spring rod 131. The buffer plate 132 is arc-shaped, and its concave surface is pressed against the outer wall of the oxygen sensor 2, and a buffer pad is provided on the concave surface.

[0058] In this embodiment, the arc-shaped plate 11 is welded to the engine, and the protective box 12 is welded or detachably connected to the arc-shaped plate 11. The detachable connection is preferably hinged. The bottom of the oxygen sensor 2 is connected to the engine through the through hole, and the oxygen sensor 2 is screwed to the through hole, so as to achieve preliminary fixation of the oxygen sensor 2. A plurality of spring rods 131 are provided in the protective box 12 to fix the oxygen sensor 2 and to play a shock-absorbing role. A buffer plate 132 is provided between the spring rods 131 and the oxygen sensor 2 to avoid direct contact between the two and to protect the oxygen sensor 2. The provision of the buffer pad can also avoid collision with the oxygen sensor 2 and protect it, thereby maintaining its high sensitivity.

[0059] In some embodiments, please refer to Figure 8 Part of the spring rod 131 is connected to the middle part of the protection box 12 and is arranged perpendicular to the axial direction of the oxygen sensor 2. The remaining part is respectively connected to the top and bottom of the protection box 12 and is arranged at an angle to the axial direction of the oxygen sensor 2.

[0060] In this embodiment, the spring rods 131 are respectively arranged in a transverse direction and an oblique direction, which can absorb the upward vibrations of various parts of the oxygen sensor 2, thereby avoiding the influence of the vibrations on its sensitivity.

[0061] In some embodiments, please refer to Figure 8 、 Figure 9 The protective box 12 includes two box bodies 121 that are snapped together on the two opening sides. The bottom end surfaces of the two box bodies 121 are arc-shaped and fit with the convex side of the arc-shaped plate 11. A card slot 122 and a positioning slot 123 are respectively provided on the two side walls of the opening of the box body 121. A card block 124 is provided in the card slot 122 and is positioned and connected with the positioning slot 123. The end surface of the card block 124 away from the positioning slot 123 and the end surface of the card slot 122 opposite to the opening side are both A magnet 125 is provided, and the magnetic poles of the two magnets 125 are the same; a through slot 126 connected to the slot 122 is provided at the top of the slot 122, and the through slot 126 extends along the height of the box body 121, and a moving block 127 is provided therein, and a push rod 128 is connected to the bottom of the moving block 127, and a push spring 129 is wound around the outer wall of the push rod 128, and the upper end surface of the block 124 is provided with a downwardly inclined inclined groove 130 corresponding to the push rod 128.

[0062] In this embodiment, the protection box 12 is configured as two relatively buckled box bodies 121, which can facilitate the disassembly and maintenance of the oxygen sensor 2; each box body 121 can be detachably connected to the arc plate 11, such as the box body 121 and the arc plate 11 are hinged, clamped, screwed, etc.; the two boxes 121 are fixed by providing a clamping block 124 and a positioning groove 123, and a clamping groove 122 and a positioning groove 123 are provided on each box body 121, and a clamping block 124 is provided in the clamping groove 122. During installation, the open sides of the two boxes 121 are opposite to each other, and the card slot 122 of one box 121 is arranged opposite to the positioning slot 123 of the other box 121, so as to realize the card connection of the two boxes 121. When the box 121 needs to be opened, the moving block 127 is pushed downward. The downward movement of the moving block 127 drives the movement of the push rod 128, and the movement of the push rod 128 can drive the inclined groove 130 to move into the card slot 122, thereby pushing the card block 124 away from the positioning slot 123.

[0063] Specifically, magnets with the same magnetic properties are respectively provided on the inner wall of the locking groove 122 and the locking block 124 , and the locking block 124 is tightly clamped in the positioning groove 123 by utilizing the principle that like charges repel.

[0064] Specifically, the upper end of each card slot 122 is connected to a through slot 126, and the through slot 126 passes through the top end surface of the box body 121. By arranging a push rod 128 in the through slot 126, the card block 124 can be pushed to move, thereby realizing the opening and closing of the box body 121; In addition, a push spring 129 is wound around the outer wall of the push rod 128 to drive the moving block 127 to move back to its original position. This process occurs after the box body 121 is opened or buckled. When the box body 121 is opened, the card block 124 enters the card slot under the push of the push rod 128 122, the two boxes 121 are separated. At this time, the push rod 128 returns to its original position under the elastic force of the push spring 129, and the card block 124 moves to the outside of the card slot 122 under the repulsive force of the two magnets 125. When the box 121 is buckled, it is also necessary to push the push rod 128 to push the card block 124 into the card slot 122 until the card 122 is aligned with the positioning groove 123, thereby pushing the push rod 128 and returning it to its original position. At this time, the card block 124 enters the positioning groove 123 under the repulsive force to achieve the connection and fixation of the two boxes 121.

[0065] In some embodiments, please refer to Figure 10 At least one locking spring 15 is connected to the inner wall of one of the boxes 121 , and the other end of the locking spring 15 can be detachably connected to a corresponding position on the inner wall of the other box 121 .

[0066] In this embodiment, the inner walls of the two boxes 121 are connected by a locking spring 15 to further fix them. When the engine shakes, it may affect the block 124, push rod 128 and other components of the box 121, causing gaps in the connection of the box 121, thereby affecting the protection of the oxygen sensor 2. Therefore, at this time, the locking spring 15 can pull the two boxes 121 to make them close together, thereby achieving sealing and fixation.

[0067] Specifically, hanging rings are provided on the inner walls of the two boxes 121, and hooks are provided at both ends of the locking spring 15, which are hooked in the corresponding hooks, and the openings of the hooks can be locked with a screw structure; in addition, the number of the locking springs 15 can be set to one or more, depending on the actual situation.

[0068] In some embodiments, a slot 14 is formed on the top of the protection box 12 for the connection line 3 to pass through, and the protection cover 41 is screwed to the slot 14 .

[0069] In this embodiment, a slot 14 is provided on the top of the protection box 12, and the oxygen sensors 2 are all provided in the protection box 12. The bottom of the connecting wire 3 is provided in the protection box 12, and the remaining part passes through the slot 14. Since the passed-through part is provided with a protective cover 41, the connecting wire 3 and the oxygen sensor 2 are fixed by screwing the protective cover 41 to the slot 14, thereby achieving the fixation of the protective cover 41 to the protection box 12.

[0070] The working principle of a high-sensitivity automotive oxygen sensor 2 in the present application is as follows: the arc plate 11 is welded to the engine, the protection box 12 is detachably connected to the arc plate 11, and the protection box 12 uses two boxes 121, which are arranged outside the oxygen sensor 2 and relatively buckled to protect it. The bottom of the oxygen sensor 2 passes through the bottom of the box 121 and the through hole on the arc plate 11 in turn to connect with the engine. The screw connection between the oxygen sensor 2 and the through hole can be used to initially fix the oxygen sensor 2, and the spring rod 131 in the box 121 is not only a further fixation of the box 121, but also a Absorb the energy generated by vibration to avoid affecting the oxygen sensor 2; the connecting wire 3 arranged on the top of the oxygen sensor 2 is protected and fixed by a protective cover 41, and a wire harness clamp 441 is provided in the protective cover 41, which can fix the connecting wire 3 in the protective cover 41 to prevent it from shaking and thus bending. The connecting wire 3 needs to be protected by an arc-shaped guide tube 42 in an inclined position. The arc-shaped guide tube 42 is composed of multiple tube bodies 421. Adjacent tube bodies 421 can be bent by hinged connection, and the bending angle of the arc-shaped guide tube 42 can be adjusted by multiple sections of flexible tube bodies 421.

[0071] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A high-sensitivity automotive oxygen sensor, characterized by: The invention comprises a mounting seat (1) for fixing an oxygen sensor (2), wherein a protective member (4) for protecting a connecting line (3) is provided on the top of the mounting seat (1); the protective member (4) comprises a longitudinally arranged protective sleeve (41), an arc-shaped guide tube (42) provided at the top of the protective sleeve (41), and a connector (43) connecting the protective sleeve (41) and the arc-shaped guide tube (42); the protective sleeve (41) is fixed to the upper end surface of the mounting seat (1) and communicates with the interior of the mounting seat (1), and a fixing member (44) for fixing the connecting line (3) is provided inside the protective sleeve (41); the One end of the arc-shaped guide tube (42) away from the protective sleeve (41) is tilted downward, and the connector (43) includes a vertical section connected to the protective sleeve (41) and an arc section connected to the arc-shaped guide tube (42), and the vertical section and the arc section have a smooth transition; the arc-shaped guide tube (42) is formed by a plurality of tube bodies (421) with successively decreasing diameters being connected to each other, and the outer wall of the inner tube body (421) and the inner wall of the outer tube body (421) of the two tube bodies (421) being connected to each other are hinged, and the inner diameter of the tube body (421) with the smallest diameter is adapted to the outer diameter of the connecting line (3).

2. A high-sensitivity automotive oxygen sensor according to claim 1, characterized in that: The fixing member (44) comprises a plurality of wire harness clamps (441) arranged on the inner wall of the protective cover (41) and in a linear array, and a soft pad (442) arranged on the inner wall of the wire harness clamps (441); the wire harness clamps (441) comprise two semicircular rings with openings arranged opposite to each other, the bottoms of the two semicircular rings are connected and fixed to the inner wall of the protective cover (41) via a hinge shaft (443), and the two semicircular rings are buckled relative to each other to form a circular clamp, and the connecting wire (3) is fixed in the circular clamp.

3. The high-sensitivity automotive oxygen sensor according to claim 2, characterized in that: A spring (444) is sleeved on the outer wall of the hinge shaft (443), and when the two semicircular rings are in an open state or tend to be open, the spring (444) gives the semicircular rings a pulling force to rebound and engage.

4. The high-sensitivity automotive oxygen sensor according to claim 1, characterized in that: The inner wall of the outer tube body (421) of the two tube bodies (421) that are connected to each other is formed with a sliding groove (422) and a hinge groove (423) that are connected to each other, and the hinge groove (423) is located at the end of the outer tube body (421) away from the protective cover (41). A hinge shaft (424) is rotatably connected in the hinge groove (423), and a hinge plate (425) is fixedly connected to the hinge shaft (424). A clamping groove (426) is formed on the top end surface of the hinge plate (425). The end of the outer wall of the inner tube body (421) protrudes downward to form a slider (427), and the slider (427) is correspondingly clamped with the clamping groove (426) or slides correspondingly with the sliding groove (422).

5. The high-sensitivity automotive oxygen sensor according to claim 4, characterized in that: The mounting seat (1) comprises an arc-shaped plate (11), a protection box (12) detachably connected to the arc-shaped plate (11), and a shock-absorbing structure (13) provided in the protection box (12); the arc-shaped plate (11) is provided with a through hole, and the oxygen sensor (2) passes through the through hole and is connected to the engine; the shock-absorbing structure (13) comprises a plurality of spring rods (131) connected to the inner wall of the protection box (12) and a buffer plate (132) connected to the end of the spring rod (131); the buffer plate (132) is arc-shaped, and its concave surface presses against the outer wall of the oxygen sensor (2), and a buffer pad is provided on the concave surface.

6. The high-sensitivity automotive oxygen sensor according to claim 5, characterized in that: Part of the spring rod (131) is connected to the middle portion of the protection box (12) and is arranged perpendicular to the axial direction of the oxygen sensor (2), and the remaining part is respectively connected to the top and bottom of the protection box (12) and is arranged at an angle to the axial direction of the oxygen sensor (2).

7. The high-sensitivity automotive oxygen sensor according to claim 1, characterized in that: The protection box (12) comprises two box bodies (121) correspondingly buckled at the opening sides, the bottom end surfaces of the two box bodies (121) are both arc-shaped and adapted to the convex side of the arc-shaped plate (11), a card slot (122) and a positioning slot (123) are respectively provided on the two side walls of the opening of the box body (121), a card block (124) correspondingly positioned and snapped with the positioning slot (123) is provided in the card slot (122), and a magnetic force is provided on the end surface of the card block (124) away from the positioning slot (123) and the end surface of the card slot (122) opposite to the opening side. Iron (125), and the magnetic poles of the two magnets (125) are the same; a through slot (126) connected to the slot (122) is provided at the top of the slot (122), the through slot (126) extends along the height of the box body (121), and a moving block (127) is provided therein, the bottom of the moving block (127) is connected to a push rod (128), a push spring (129) is wound on the outer wall of the push rod (128), and an inclined groove (130) corresponding to the push rod (128) and inclined downward is provided on the upper end surface of the block (124).

8. The high-sensitivity automotive oxygen sensor according to claim 7, characterized in that: At least one locking spring (15) is connected to the inner wall of one of the boxes (121), and the other end of the locking spring (15) can be detachably connected to a corresponding position on the inner wall of the other box (121).

9. The high-sensitivity automotive oxygen sensor according to claim 7, characterized in that: A slot hole (14) for the connecting wire (3) to pass through is provided on the top of the protection box (12), and the protection cover (41) is screwed to the slot hole (14).

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