Nitrogen-oxygen sensor and multi-station special testing machine thereof

Abstract

The invention discloses a nitrogen-oxygen sensor and a multi-station special testing machine thereof, the nitrogen-oxygen sensor comprises a sensor probe with a built-in heating element, a threaded connecting piece, a wire harness and a connecting plug, the threaded connecting piece comprises an external thread, a hexagonal nut, a plurality of side grooves, a plurality of notches, a plurality of floating insertion blocks and a plurality of pressure springs, the reset device comprises a plurality of swing rods, a plurality of transmission sliding grooves, a plurality of transmission sliding rods, a floating sleeve, a bottom plate and a plurality of lifting sliding rods, in daily use, a plurality of pits are formed in the installation position of the vehicle exhaust system in advance, a wrench is used for being matched with the floating sleeve, and the wrench is pressed downwards; under the matching action of the swing rods, the transmission sliding grooves, the transmission sliding rods, the floating sleeve, the bottom plate and the lifting sliding rods, the lower ends of the transmission sliding rods return to the corresponding notches, after threads are screwed tightly and the spanner is taken down, the pressure springs release elastic potential energy, the transmission sliding rods are inserted into the pits preset in the installation position of the vehicle exhaust system, and then the vehicle exhaust system is installed. Therefore, the nitrogen-oxygen sensor is prevented from loosening.

Description

Technical Field

[0001] The invention relates to the field of nitrogen oxygen sensors, and in particular to a nitrogen oxygen sensor and a multi-station special testing machine thereof. Background Art

[0002] A NOx sensor is a sensor used to detect the concentration of nitrogen oxides (NOx) in engine exhaust. It works based on the electrochemical principle. When NOx molecules in the exhaust gas come into contact with the electrode surface of the sensor, a redox reaction occurs. It usually includes a sensing element, a heating element, a housing, and connectors.

[0003] The connectors of the nitrogen oxide sensor are usually screws, which are installed on the vehicle's exhaust system through threaded connections. However, the vehicle will generate vibrations when it is running, and the stability of the threaded connection is poor, which can easily cause the nitrogen oxide sensor to loosen. Summary of the invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art.

[0005] The present application provides a nitrogen oxygen sensor, including a sensor probe with a built-in heating element, a threaded connector, a wiring harness, and a connecting plug, wherein the threaded connector includes:

[0006] An external thread, which is arranged on the outer wall of the sensor probe;

[0007] A hexagonal nut fixed on the outer wall of the sensor probe;

[0008] A plurality of side grooves are respectively arranged on the planes of the circumference of the hexagonal nut, and one side of the bottom has a notch;

[0009] A plurality of floating plugs are respectively installed in the side grooves in a floating manner, the lower ends of which can extend out of the grooves, and a pressure spring is arranged between the upper ends and the top surface of the corresponding side grooves;

[0010] The resetting device is used to return the lower end of each floating plug block to the corresponding slot.

[0011] The reset device includes:

[0012] A plurality of swing rods, the middle part of which is rotatably mounted in each side groove through a corresponding rotating shaft, and both ends of the swing rods are provided with transmission slide grooves;

[0013] A plurality of transmission slide bars are respectively fixed on each floating plug block and slidably cooperate with the transmission slide grooves adjacent to the corresponding swing rods;

[0014] A floating sleeve is slidably mounted on the outside of the hexagonal nut, and a bottom plate is provided at the bottom of the peripheral wall;

[0015] A plurality of lifting slide bars have one end that is respectively slidably matched with the transmission slide grooves away from the floating plug block, and the other end that is fixedly connected with the inner peripheral wall of the floating sleeve.

[0016] At the same time, a multi-station special testing machine is disclosed, including:

[0017] A machine table with several workstations on the top, several fixed tooling, a pair of hollow tubes with several probe jacks at intervals on the top, and several anti-slip mechanisms;

[0018] The anti-drop mechanism is arranged in the hollow tube, corresponding to each probe plug hole, and is used to fix the sensor probe inserted into the probe plug hole.

[0019] The anti-slip mechanism includes:

[0020] The inner rotating cylinder is rotatably mounted in the hollow tube, and the top end is rotatably matched with the probe insertion hole;

[0021] The outer rotating cylinder is rotatably mounted on the outside of the inner rotating cylinder, a top spring is provided at the bottom, and a plurality of pressure rods are provided at the top of the inner peripheral wall and extend into the inner rotating cylinder through corresponding vertical slots;

[0022] A pair of clamping members are symmetrically mounted on the peripheral wall of the inner rotating cylinder, used for clamping the sensor probe, and are transmission-connected to the outer rotating cylinder through corresponding transmission members;

[0023] The locking member is used to fix the outer rotating cylinder after it is lowered.

[0024] The clamping parts include:

[0025] A sliding frame is fixedly mounted on one side of the peripheral wall of the inner rotating cylinder, and a tightening block is slidably mounted inside the frame;

[0026] A lifting block can be lifted and installed on one end of the locking block facing the sensor probe through a dovetail groove and a dovetail slider;

[0027] A plurality of lifting springs are respectively arranged between the bottom of each dovetail groove and the bottom surface of the corresponding dovetail slider;

[0028] A locking member, used to fix the lowered pressing block to the lifting pressing block;

[0029] The unlocking piece is used to release the fixing of the locking piece to the abutting block when the outer rotating cylinder rises.

[0030] Transmission parts include:

[0031] A pair of transmission swing arms, one end of which is hinged to the abutting block, and the other end of which is hinged to the inner peripheral wall of the outer rotating cylinder;

[0032] A pair of accommodating grooves are arranged on the inner peripheral wall of the outer rotating cylinder and are used to accommodate corresponding transmission swing arms.

[0033] The locking parts include:

[0034] A pair of locking grooves are arranged at intervals in the upper and lower sides on the side wall of the lifting block facing the sensor probe;

[0035] The floating block can be floatingly installed on the side wall of the lifting block facing the pressing block through the installation groove and the elastic body, and the bottom surface of the outer end is inclined and can be inserted into each locking groove.

[0036] Unlocking parts include:

[0037] An L-groove, which is arranged on the side wall of the abutting block away from the floating block, and the bent end is connected to the lowermost locking groove;

[0038] An L block is slidably mounted in the L groove, and a protrusion is fixed on the outward side wall;

[0039] When the outer rotating cylinder rises, the protrusion is pushed toward the locking groove by the transmission swing arm below.

[0040] The locking parts include:

[0041] A locking plate is fixed in the inner cavity of the hollow tube and has a circular hole in the center;

[0042] A plurality of mounting grooves are arranged at intervals along the circumferential direction on the circumferential side of the outer rotating cylinder;

[0043] A plurality of turning rods, the lower ends of which are rotatably mounted at the bottom of each slot via a rotating shaft;

[0044] A plurality of retaining edges are respectively arranged at one end of the top of each notch away from the locking plate;

[0045] A plurality of shallow grooves are arranged at intervals along the circumferential direction on the inner circumferential wall of the circular hole;

[0046] A plurality of deep grooves are arranged at intervals along the circumferential direction on the inner peripheral wall of the circular hole.

[0047] The locking element also includes:

[0048] The annular protrusion is fixedly arranged at the bottom of the inner cavity of the hollow tube, and the outer peripheral wall is rotatably matched with the bottom of the inner peripheral wall of the inner rotating cylinder;

[0049] A notch is arranged on one side of the ring protrusion;

[0050] A reset block is fixedly arranged at the bottom of the peripheral wall of the inner rotating cylinder and extends into the slot;

[0051] A return spring installed between one end of the slot and the return block;

[0052] When each turning rod approaches the corresponding deep groove, the return spring is compressed.

[0053] The beneficial effects of the present invention are as follows:

[0054] 1. Through the arrangement of several side grooves, several floating plugs, several pressure springs, several swing rods, several transmission slide rods, several transmission grooves, several transmission slide rods, floating sleeves and several lifting slide rods, in combination with several recesses preset at the installation position of the vehicle exhaust system, the threads are prevented from loosening and the firmness of the installation of the nitrogen oxide sensor is improved;

[0055] 2. Through the arrangement of the inner rotating cylinder, the outer rotating cylinder, a plurality of sliding frames, a plurality of lifting blocks, a plurality of dovetail grooves, a plurality of dovetail sliders, a plurality of lifting springs, a plurality of transmission parts, locking parts and unlocking parts, it is ensured that the high-temperature sensor probe will not be separated from the corresponding probe jack during the test process, thereby improving the accuracy of the test process;

[0056] 3. Through the arrangement of a pair of locking grooves, floating blocks, L grooves, L blocks, convex blocks, locking plates, a number of notched grooves, a number of flip rods, a number of retaining edges, a number of shallow grooves, a number of deep grooves, convex rings, notched grooves, reset springs, the sensor probe can be fixed by simply pressing it inwards, and the sensor probe can be released by rotating it, which is conducive to the rapid fixation and disassembly of the sensor probe and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a stereoscopic diagram of a nitrogen oxide sensor in an embodiment of the present application;

[0058] Figure 2 This is a schematic diagram of the sensor head structure in the embodiment of the present application (partially cut away);

[0059] Figure 3 A top view of a multi-station dedicated testing machine in an embodiment of the present application;

[0060] Figure 4 This is a schematic diagram of the anti-slip mechanism structure in the embodiment of the present application;

[0061] Figure 5 for Figure 4 A schematic diagram of the partially enlarged structure;

[0062] Figure 6 Schematic diagram of the locking plate structure in the embodiment of the present application.

[0063] Reference numerals

[0064] 11-sensor probe, 12-threaded connector, 121-external thread, 122-hexagonal nut, 123-side groove, 124-missing groove, 125-floating plug, 126-pressure spring, 13-reset device, 131-rocker, 132-transmission slide, 133-transmission slide, 134-floating sleeve, 135-bottom plate, 136-lifting slide, 21-machine, 22-fixed tooling, 24-probe jack, 25-hollow tube, 26-anti-slip mechanism, 261-inner rotating cylinder, 262-outer rotating cylinder, 263-upper spring, 264-vertical groove, 265-pressure rod, 27 - clamping part, 271- sliding frame, 272- tightening block, 273- lifting block, 274- lifting spring, 28- transmission part, 281- transmission swing arm, 282- receiving groove, 29- locking part, 291- locking plate, 292- mounting groove, 293- flip rod, 294- stop edge, 295- shallow groove, 296- deep groove, 297- annular protrusion, 298- slot, 299- reset block, 2910- reset spring, 210- locking part, 2101- locking groove, 2102- floating block, 211- unlocking part, 2111- L groove, 2112- L block, 2113- protrusion. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0066] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0067] The nitrogen oxygen sensor and its multi-station dedicated testing machine provided in the embodiment of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

[0068] Embodiment 1:

[0069] like Figure 1 , Figure 2 and Figure 4As shown, an embodiment of the present application provides a nitrogen oxygen sensor, including a sensor probe 11 with a built-in heating element, a threaded connector 12, a wiring harness, and a connecting plug, wherein the threaded connector 12 includes: an external thread 121, which is arranged on the outer wall of the sensor probe 11; a hexagonal nut 122, which is fixed on the outer wall of the sensor probe 11; a plurality of side grooves 123, which are respectively arranged on the planes on the circumference of the hexagonal nut 122, and a notch 124 is provided on one side of the bottom; a plurality of floating plugs 125, which are respectively floatingly installed in each side groove 123, and the lower end can extend out of the notch 124, and a pressure spring 126 is provided between the upper end and the top surface of the corresponding side groove 123; a reset device 13, which is used to make the lower end of each floating plug 125 return to the corresponding notch 124.

[0070] Furthermore, the reset device 13 includes a plurality of rocker rods 131, the middle parts of which are rotatably installed in each side groove 123 through corresponding rotating shafts, and transmission slide grooves 132 are provided at both ends; a plurality of transmission slide rods 133 are respectively fixed on each floating plug block 125, and slidingly cooperate with the transmission slide grooves 132 adjacent to the corresponding rocker rods 131; a floating sleeve 134 can be slidably sleeved on the outer side of the hexagonal nut 122, and a bottom plate 135 is provided at the bottom of the peripheral wall; a plurality of lifting slide rods 136, one end of which is respectively slidably cooperated with each transmission slide groove 132 away from the floating plug block 125, and the other end is fixedly connected to the inner peripheral wall of the floating sleeve 134.

[0071] In this embodiment of the present application, due to the adoption of the above-mentioned structure, a recessed groove for plugging with each floating plug block 125 is provided at the installation position of the vehicle exhaust system. When installing the sensor probe 11, a wrench is used to engage with the floating sleeve 134, and then the wrench is pressed toward the vehicle exhaust system to make the floating sleeve 134 descend relative to the hexagonal nut 122, and each lifting slide bar 136 descends and slides in the corresponding transmission slide groove 132, driving the corresponding swing rod 131 to swing, and the other end of each swing rod 131 rises, and cooperates with each transmission slide rod 133 through the corresponding transmission slide groove 132 to pull each floating The plug block 125 rises until the bottom surface of the floating sleeve 134 is flush with the bottom surface of the hexagonal nut 122. At this time, the bottom end surface of each floating plug block 125 is also flush with the bottom surface of the hexagonal nut 122. The wrench is continued to be turned until the bottom surface of the inner hexagonal nut 122 is tightly against the surface of the vehicle exhaust system installation position. Each floating plug block 125 is rotated to correspond to the corresponding groove. The wrench is removed, and each pressure spring 126 releases elastic potential energy to push each floating plug block 125 down until the lower end is inserted into the corresponding groove. At the same time, each swing rod 131 swings in the opposite direction, and the floating sleeve 134 slides away from the vehicle exhaust system.

[0072] When the sensor probe 11 needs to be disassembled, the above operation is repeated, with the only difference being that the turning direction is opposite.

[0073] Embodiment 2:

[0074] like Figures 1 to 6As shown, in this embodiment, a multi-station dedicated testing machine for nitrogen oxygen sensors is also disclosed, including a machine table 21 with a plurality of stations on the top, a plurality of fixed tooling 22, a pair of hollow tubes 25 with a plurality of probe plug holes 24 spaced apart on the top, and a plurality of anti-slip mechanisms 26. The anti-slip mechanisms 26 are arranged in the hollow tubes 25, corresponding to each probe plug hole 24, respectively, and are used to fix the sensor probe 11 inserted into the probe plug hole 24.

[0075] Furthermore, the anti-slip mechanism 26 includes an inner rotating cylinder 261, which is rotatably installed in the hollow tube 25, and the top end is rotatably matched with the probe socket 24; an outer rotating cylinder 262, which is rotatably installed on the outside of the inner rotating cylinder 261, and a top spring 263 is provided at the bottom, and a plurality of pressure rods 265 are provided at the top of the inner peripheral wall and extend into the inner rotating cylinder 261 through corresponding vertical grooves 264; a pair of clamping members 27, which are symmetrically installed on the peripheral wall of the inner rotating cylinder 261, and are used to clamp the sensor probe 11, and are connected to the outer rotating cylinder 262 through corresponding transmission members 28; a locking member 29, which is used to fix the outer rotating cylinder 262 after it is lowered, and when the outer rotating cylinder 262 rises, the protrusion 2113 is pushed toward the locking groove 2101 by the lower transmission swing arm 281.

[0076] In this embodiment of the present application, due to the adoption of the above-mentioned structure, when the sensor probe 11 is installed, it is extended into the inner rotating cylinder 261 and pressed down, and the hexagonal nut 122 is pressed against the top surface of each pressure rod 265, and each pressure rod 265 and the outer rotating cylinder 262 are lowered together with the sensor probe 11, and the upper spring 263 is compressed and shortened, and the descending outer rotating cylinder 262 drives each transmission member 28 to move, so that a pair of transmission members 28 are close to each other until they are pressed against the peripheral wall of the sensor probe 11, and then the locking member 29 is actuated to fix the outer rotating cylinder 262 so that it cannot rise, thereby completing the fixation of the sensor probe 11. When the sensor probe 11 needs to be removed, the locking member 29 is operated to release the fixation of the outer rotating cylinder 262, and the upper spring 263 releases the elastic potential energy to push the outer rotating cylinder 262 to rise, cooperating with each transmission member 28 to make a pair of clamping members 27 release the clamping of the outer wall of the sensor probe 11, and then the sensor probe 11 can be removed.

[0077] Embodiment 3:

[0078] like Figures 4 to 5As shown, in the present embodiment, in addition to the structural features of the aforementioned embodiments, the clamping member 27 includes a sliding frame 271, which is fixedly mounted on one side of the peripheral wall of the inner rotating cylinder 261, and a clamping block 272 is slidably installed inside; a lifting block 273, which can be lifted and lowered on the end of the clamping block 272 facing the sensor probe 11 through a dovetail groove and a dovetail slider; a plurality of lifting springs 274, which are respectively arranged between the bottom of each dovetail groove and the bottom surface of the corresponding dovetail slider; a locking member 210, which is used to fix the clamping block 272 after it is lowered to the lifting block 273; and an unlocking member 211, which is used to release the fixing of the locking member 210 to the clamping block 272 when the outer rotating cylinder 262 rises.

[0079] Furthermore, the transmission member 28 includes a pair of transmission swing arms 281, one end of which is hinged to the clamping block 272 and the other end is hinged to the inner circumferential wall of the outer rotating cylinder 262; a pair of accommodating grooves 282 are arranged on the inner circumferential wall of the outer rotating cylinder 262 for accommodating the corresponding transmission swing arms 281.

[0080] Furthermore, the locking member 210 includes a pair of locking grooves 2101, which are arranged at upper and lower intervals on the side wall of the lifting block 273 facing the sensor probe 11; the floating block 2102 can be floatingly installed on the side wall of the lifting block 273 facing the tightening block 272 through the mounting groove 292 and the elastic body, and the bottom surface of the outer end is inclined and can be inserted into each locking groove 2101.

[0081] Furthermore, the unlocking member 211 includes an L-groove 2111, which is arranged on the side wall of the clamping block 272 away from the floating block 2102, and the bent end is connected to the lowermost locking groove 2101; the L block 2112 is slidably installed in the L-groove 2111, and a protrusion 2113 is fixed on the outward side wall. When the outer rotating cylinder 262 rises, the protrusion 2113 is pushed toward the locking groove 2101 by the lower transmission swing arm 281.

[0082] In this embodiment of the present application, due to the adoption of the above-mentioned structure, when the outer rotating cylinder 262 descends, it pushes each transmission swing arm 281 to descend, and the inner end of each transmission swing arm 281 moves toward the sensor probe 11, pushing each tightening block 272 and the lifting block 273 close to the sensor probe 11, and the outer end surface of the lifting block 273 first contacts the peripheral wall of the sensor probe 11, and then the sensor probe 11 continues to descend, driving the corresponding lifting block 273 to descend, and at the same time, a pair of lifting blocks 273 are still mutually When the dovetail sliders are close, each dovetail slider descends in the corresponding dovetail groove, each lifting spring 274 is compressed and shortened, and the bottom surface of the outer end of each floating block 2102 is inclined, and the elastic member can be separated from the upper locking groove 2101, until each floating block 2102 corresponds to each locking groove 2101 below, and each elastic body exerts elastic force to make each floating block 2102 extend into the corresponding locking groove 2101. At this time, each lifting block 273 cannot rise, and the locking member 29 fixes the outer rotating cylinder 262, completing the fixation of the sensor probe 11;

[0083] When the sensor probe 11 needs to be released, the groove-shaped locking member 29 releases the fixation of the outer rotating cylinder 262, and the upper spring 263 releases the elastic potential energy to push the outer rotating cylinder 262 up, and each transmission swing arm 281 rises, and the inner end pulls the corresponding tightening block 272 and the corresponding lifting block 273 away from the sensor probe 11, and then each protrusion 2113 contacts the side wall of the corresponding transmission swing arm 281 and is pushed toward the locking groove 2101, so that the locking grooves 2101 located below The floating block 2102 is pushed out, and the elastic body is compressed to store elastic potential energy. Each lifting spring 274 releases the elastic potential energy, pushing each dovetail slider and the corresponding lifting block 273 to rise until each floating block 2102 corresponds to the corresponding locking groove 2101 above. The corresponding elastic parts release the elastic potential energy to push each floating block 2102 to insert into the corresponding locking groove 2101 above, until each lifting block 273 is completely out of contact with the sensor probe 11, and the sensor probe 11 can be taken out.

[0084] Embodiment 4:

[0085] like Figures 5 and 6 As shown, in the present embodiment, in addition to the structural features of the aforementioned embodiments, the locking member 29 includes a locking plate 291, which is fixed in the inner cavity of the hollow tube 25 and has a circular hole in the center; a plurality of mounting grooves 292, which are circumferentially spaced apart on the circumferential side of the outer rotating cylinder 262; a plurality of flip rods 293, the lower ends of which are rotatably mounted on the bottom of each mounting groove 292 through a rotating shaft; a plurality of retaining edges 294, which are respectively arranged at one end of the top of each mounting groove 292 away from the locking plate 291; a plurality of shallow grooves 295, which are circumferentially spaced apart on the inner circumferential wall of the circular hole; and a plurality of deep grooves 296, which are circumferentially spaced apart on the inner circumferential wall of the circular hole.

[0086] Furthermore, the locking member 29 also includes an annular protrusion 297, which is fixed at the bottom of the inner cavity of the hollow tube 25, and the outer peripheral wall is rotatably matched with the bottom of the inner peripheral wall of the inner rotating cylinder 261; a groove 298, which is arranged on one side of the annular protrusion 297; a reset block 299, which is fixed at the bottom of the peripheral wall of the inner rotating cylinder 261 and extends into the groove 298; a reset spring 2910, which is installed between one end of the groove 298 and the reset block 299, and when each flip rod 293 approaches the corresponding deep groove 296, the reset spring 2910 is compressed and shortened.

[0087] In this embodiment of the present application, due to the adoption of the above-mentioned structure, the outer rotating cylinder 262 descends, and each flip rod 293 also descends accordingly. Each flip rod 293 passes through the corresponding shallow groove 295 until it is located below the locking plate 291. Under the action of gravity (a torsion spring can be provided between the rotating shaft and the flip rod 293), the outer end of each flip rod 293 turns outward and abuts against the bottom surface of the locking plate 291, so that the outer rotating cylinder 262 cannot rise. When it is necessary to raise the outer rotating cylinder 262, the sensor probe 11 is rotated, and the top of the inner cavity of the inner rotating cylinder 261 and the bottom plate 135 on the floating sleeve 134 are both hexagonal, and each pressure rod 265 is aligned with the corresponding vertical groove 264. The outer rotating cylinder 262 and the inner rotating cylinder 261 rotate together by sliding fit, and the return spring 2910 is compressed and shortened until each flip rod 293 moves to correspond to each deep groove 296. At this time, each flip rod 293 is completely turned outward to be horizontal, and the return spring 2910 releases elastic potential energy to push the outer rotating cylinder 262, each flip rod 293 and each pressure rod 265 to rise. After each flip rod 293 passes through the corresponding deep groove 296, it moves to the top of the locking plate 291. The return spring 2910 releases elastic potential energy to push the outer rotating cylinder 262 and the inner rotating cylinder 261 to reverse, so that each flip rod 293 moves to a position corresponding to the corresponding shallow groove 295.

[0088] As the outer rotating cylinder 262 descends, the flip rod 293, which was originally in a horizontal state, enters the shallow groove 295 and is guided by the shallow groove 295 to flip into the corresponding installation groove 292. The inner side wall of the top end of each flip rod 293 will eventually contact each retaining edge 294, causing the top end of each flip rod 293 to still tilt outward, so that when each flip rod 293 descends to below the baffle, the top end can flip outward.

[0089] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0090] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A nitrogen oxide sensor, comprising a sensor probe (11) with a built-in heating element, a threaded connector (12), a wiring harness, and a connecting plug, characterized in that: The threaded connector (12) comprises: An external thread (121) is arranged on the outer wall of the sensor probe (11); A hexagonal nut (122) fixedly mounted on the outer wall of the sensor probe (11); A plurality of side grooves (123) are respectively arranged on the planes of the circumference of the hexagonal nut (122), and a notch (124) is provided on one side of the bottom; A plurality of floating inserts (125) are respectively installed in the side grooves (123) in a floating manner, the lower ends of which can extend out of the notch (124), and a pressure spring (126) is arranged between the upper ends and the top surface of the corresponding side grooves (123); A resetting device (13) is used to return the lower end of each floating plug (125) back into the corresponding slot (124).

2. A nitrogen oxygen sensor according to claim 1, characterized in that: The resetting device (13) comprises: A plurality of swing rods (131), the middle portions of which are rotatably mounted in the side grooves (123) via corresponding rotating shafts, and both ends of which are provided with transmission slide grooves (132); A plurality of transmission slide bars (133) are respectively fixed on each of the floating insert blocks (125) and slidably cooperate with the transmission slide grooves (132) adjacent to the corresponding swing rods (131); A floating sleeve (134) is slidably mounted on the outside of the hexagonal nut (122), and a bottom plate (135) is provided at the bottom of the peripheral wall; A plurality of lifting slide bars (136) have one end that is slidably matched with each transmission slide groove (132) away from the floating plug block (125), and the other end that is fixedly connected with the inner peripheral wall of the floating sleeve (134).

3. A multi-station dedicated testing machine for nitrogen oxygen sensors according to claim 2, characterized in that: include: A machine platform (21) with a plurality of workstations on the top, a plurality of fixed tooling (22), a pair of hollow tubes (25) with a plurality of probe plug holes (24) spaced apart on the top, and a plurality of anti-slip mechanisms (26); The anti-drop mechanism (26) is arranged in the hollow tube (25), corresponding to each of the probe insertion holes (24), and is used to fix the sensor probe (11) inserted into the probe insertion hole (24).

4. The multi-station dedicated testing machine according to claim 3, characterized in that: The anti-slip mechanism (26) comprises: An inner rotating cylinder (261) is rotatably mounted in the hollow tube (25), and its top end is rotatably matched with the probe insertion hole (24); The outer rotating cylinder (262) is rotatably mounted on the outer side of the inner rotating cylinder (261), a top spring (263) is provided at the bottom, and a plurality of pressure rods (265) are provided at the top of the inner peripheral wall and extend into the inner rotating cylinder (261) through corresponding vertical slots (264); A pair of clamping members (27) are symmetrically mounted on the peripheral wall of the inner rotating cylinder (261), used for clamping the sensor probe (11), and are transmission-connected to the outer rotating cylinder (262) via corresponding transmission members (28); A locking member (29) is used to fix the outer rotating cylinder (262) after it is lowered.

5. The multi-station dedicated testing machine according to claim 4, characterized in that: The clamping member (27) comprises: A sliding frame (271) is fixedly mounted on one side of the peripheral wall of the inner rotating cylinder (261) and has a pressing block (272) slidably mounted therein; A lifting block (273) is installed on one end of the abutment block (272) facing the sensor probe (11) in a lifting manner through a dovetail groove and a dovetail slider; A plurality of lifting springs (274) are respectively arranged between the bottom of each dovetail groove and the bottom surface of the corresponding dovetail slider; A locking member (210) is used to fix the lowered pressing block (272) to the lifting pressing block (273); The unlocking member (211) is used to release the fixing of the locking member (210) to the abutting block (272) when the outer rotating cylinder (262) rises.

6. The multi-station dedicated testing machine according to claim 5, characterized in that: The transmission member (28) comprises: a pair of transmission swing arms (281), one end of which is hinged to the abutting block (272), and the other end of which is hinged to the inner peripheral wall of the outer rotating cylinder (262); A pair of accommodating grooves (282) are arranged on the inner peripheral wall of the outer rotating cylinder (262) and are used to accommodate the corresponding transmission swing arms (281).

7. The multi-station dedicated testing machine according to claim 5, characterized in that: The locking member (210) comprises: A pair of locking grooves (2101) are arranged at intervals in the upper and lower directions on the side wall of the lifting block (273) facing the sensor probe (11); The floating block (2102) is floatably mounted on the side wall of the lifting block (273) facing the pressing block (272) through the mounting groove (292) and the elastic body, and the bottom surface of the outer end is inclined and can be inserted into each locking groove (2101).

8. The multi-station dedicated testing machine according to claim 6, characterized in that: The unlocking member (211) comprises: An L-shaped groove (2111), which is arranged on the side wall of the abutting block (272) away from the floating block (2102), and the bent end is connected to the lowermost locking groove (2101); An L block (2112) is slidably mounted in the L groove (2111), and a protrusion (2113) is fixedly arranged on the outward side wall; When the outer rotating cylinder (262) rises, the protrusion (2113) is pushed toward the locking groove (2101) by the transmission swing arm (281) below.

9. The multi-station dedicated testing machine according to claim 5, characterized in that: The locking member (29) comprises: A locking plate (291) is fixedly arranged in the inner cavity of the hollow tube (25) and has a circular hole at the center; A plurality of mounting grooves (292) are arranged at intervals along the circumferential direction on the circumferential side of the outer rotating cylinder (262); A plurality of turning rods (293), the lower ends of which are rotatably mounted on the bottom of each of the notches (124) via a rotating shaft; A plurality of retaining edges (294) are respectively arranged at one end of the top of each of the slots (124) away from the locking plate (291); A plurality of shallow grooves (295) are arranged at intervals along the circumferential direction on the inner peripheral wall of the circular hole; A plurality of deep grooves (296) are arranged at intervals along the circumferential direction on the inner peripheral wall of the circular hole.

10. The multi-station dedicated testing machine according to claim 9, characterized in that: The locking member (29) further comprises: An annular protrusion (297) is fixedly arranged at the bottom of the inner cavity of the hollow tube (25), and its outer peripheral wall is rotatably matched with the bottom of the inner peripheral wall of the inner rotating cylinder (261); A notch (298) is provided on one side of the annular protrusion (297); A reset block (299) is fixedly mounted on the bottom of the peripheral wall of the inner rotating cylinder (261) and extends into the slot (298); A return spring (2910) installed between one end of the slot (298) and the return block (299); When each of the flip rods (293) approaches the corresponding deep groove (296), the return spring (2910) is compressed and shortened.

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