Fast-assembly type nitrogen and oxygen sensor with plastic appearance

Abstract

The utility model discloses a quick-assembly type nitrogen-oxygen sensor with a plastic appearance, and relates to the technical field of nitrogen-oxygen sensors. The utility model relates to a quick-assembly type nitrogen oxygen sensor with a plastic appearance, which comprises a sensor end which is connected with a main body shell through a wire harness, and further comprises an upper cover shell, a lower cover shell and a nitrogen oxygen sensor, the groove is formed in one surface, far away from the upper cover shell, of the main body shell; one end of the clamping piece is connected with the upper cover shell; according to the utility model, when the mounting plate is clamped in the groove of the main body shell, the clamping piece is firmly propped against the groove, so that the upper cover shell can be fixed on the main body shell again through the clamping piece besides being fixed through glue, the upper cover shell is further prevented from being separated from the main body shell, and the service life of the upper cover shell is prolonged. The situation that normal work of a circuit board in the main body shell is affected due to water inflow caused by separation of the upper cover shell and the main body shell in the use process of the nitrogen-oxygen sensor is effectively avoided, and the main body shell is convenient to install by arranging the installation feet.

Description

Technical Field

[0001] The utility model belongs to the technical field of nitrogen oxide sensors, and specifically relates to a quick-installation plastic-shaped nitrogen oxide sensor. Background Art

[0002] A nitrogen oxide sensor utilizes a solid electrolyte yttria-doped zirconia (YSZ) ceramic material, which has high ionic conductivity, good chemical stability, and structural stability at high temperatures, and the selective catalytic sensitivity of a special NOx-sensitive electrode material to NOx gas. By combining with a special sensor structure, an electrical signal of NOx is obtained. Finally, using special weak-signal detection and inaccurate electronic control technology, the NOx gas in the truck engine exhaust is detected and converted into a standard CAN bus digital signal, thereby completing the monitoring of NOx gas emissions;

[0003] The nitrogen oxide sensor uploads the detected nitrogen oxide concentration data to the in-vehicle computer, i.e., the ECU. The ECU controls the urea injection amount of the SCR system according to the data, thereby reducing nitrogen oxide emissions and realizing the OBD monitoring of the SCR component;

[0004] Therefore, the nitrogen oxide sensor needs to be connected to the in-vehicle computer. Currently, the connection methods include directly plugging into the interface of the in-vehicle computer or plugging into the wiring harness on the in-vehicle computer. In some special installation environments, in order to avoid loosening between the housing of the installation circuit board and the in-vehicle computer interface, and to avoid the separation or cracking of the housing of the installation circuit board during the bumpy process of the vehicle, it is necessary to redesign the plastic housing of the nitrogen oxide sensor. For this reason, a quick-installation plastic-shaped nitrogen oxide sensor is proposed. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a quick-installation plastic-shaped nitrogen oxide sensor that can overcome or at least partially solve the above problems.

[0006] To solve the above technical problem, the basic concept of the technical solution adopted by the utility model is: a quick-installation plastic-shaped nitrogen oxide sensor, including a sensor head connected to the main body housing through a wiring harness, and further including: an upper cover shell, snap-connected to the main body housing; a groove, opened on the surface of the main body housing away from the upper cover shell; a clip, one end of which is connected to the upper cover shell, the clips are symmetrically arranged on the upper cover shell, and one end of the clip extends into the groove; a mounting plate, snap-connected to the groove. When the mounting plate is snap-connected to the groove of the main body housing, the mounting plate presses the clip located in the groove, and through the clip, the upper cover shell and the main body housing are closely attached; mounting feet, symmetrically and fixedly connected to both sides of the mounting plate respectively.

[0007] Preferably, a first plug connector and a second plug connector are respectively arranged on the main body housing.

[0008] Furthermore, a boss is arranged in the groove of the main body housing, and rib strips are arranged on both sides of the groove. A clamping groove is formed between the boss and the rib strips; a clamping block is fixedly connected to the bottom surface of the mounting plate, and the clamping block corresponds to the clamping groove.

[0009] Furthermore, the side arm on the clip is in contact with the side surface of the main body housing, the cross arm on the clip is in contact with the bottom surface of the main body housing, and the bent end of the clip is located in the clamping groove.

[0010] Furthermore, a positioning groove is arranged on the boss, and a positioning block is fixedly connected to the bottom surface of the mounting plate, and the positioning block corresponds to the positioning groove.

[0011] Furthermore, alignment grooves are formed on both sides of the main body housing where the groove is located, and the clip corresponds to the alignment grooves.

[0012] Furthermore, the mounting feet on the mounting plate correspond to the cross arm of the clip.

[0013] Preferably, screw holes are formed on both the rib strips and the mounting plate.

[0014] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art: When the mounting plate is clamped in the groove of the main body housing, the clip will be firmly pressed in the groove, which enables the upper cover shell to be fixed on the main body housing again by the clip in addition to being fixed by glue, thereby preventing the upper cover shell from separating and detaching from the main body housing, effectively avoiding water ingress during the use of the nitrogen oxide sensor due to the separation of the upper cover shell from the main body housing, which affects the normal operation of the circuit board in the main body housing, and facilitating the installation of the main body housing by providing mounting feet.

[0015] The following further describes in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the drawings:

[0017] Figure 1 is a schematic three-dimensional structure diagram of a quick-installation type nitrogen oxide sensor with a plastic outer shape proposed by the present utility model Figure 1 ;

[0018] Figure 2 is a top view of a quick-installation type nitrogen oxide sensor with a plastic outer shape proposed by the present utility model Figure 1 ;

[0019] Figure 3Schematic three - dimensional structure of a quick - installation type nitrogen - oxygen sensor with a plastic outer shape proposed by the present utility model Figure 2 ;

[0020] Figure 4 Top view of a quick - installation type nitrogen - oxygen sensor with a plastic outer shape proposed by the present utility model Figure 2 ;

[0021] Figure 5 Schematic structural diagram of the clamping block and positioning block of a quick - installation type nitrogen - oxygen sensor with a plastic outer shape proposed by the present utility model;

[0022] Figure 6 Schematic structural diagram of the mounting plate of a quick - installation type nitrogen - oxygen sensor with a plastic outer shape proposed by the present utility model.

[0023] In the figure: 1, sensor end; 11, wire harness; 12, main body housing; 120, upper cover housing; 121, first plug - in connector; 122, second plug - in connector; 13, groove; 131, boss; 132, rib; 133, positioning groove; 134, card slot; 135, alignment groove; 136, screw hole; 14, clip; 141, side arm; 142, cross - arm; 143, bent end; 15, mounting plate; 151, mounting foot; 152, clamping block; 153, positioning block. Specific embodiments

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but not to limit the scope of the present utility model.

[0025] Embodiment: Refer to Figures 1 - 6 , a quick - installation type nitrogen - oxygen sensor with a plastic outer shape, including a sensor end 1 connected to the main body housing 12 through a wire harness 11, and further including: an upper cover housing 120, which is snap - connected to the main body housing 12; a groove 13, which is opened on the surface of the main body housing 12 away from the upper cover housing 120; a clip 14, one end of which is connected to the upper cover housing 120, the clips 14 are symmetrically arranged on the upper cover housing 120, and one end of the clip 14 extends into the groove 13; a mounting plate 15, which is snap - connected to the groove 13. When the mounting plate 15 is snap - connected to the groove 13 of the main body housing 12, the mounting plate 15 presses the clip 14 located in the groove 13, and through the clip 14, the upper cover housing 120 is closely attached to the main body housing 12; mounting feet 151, which are symmetrically and fixedly connected to both sides of the mounting plate 15 respectively.

[0026] During use, by snap - fitting the mounting plate 15 into the groove 13, the mounting plate 15 is connected to the main body housing 12, and the mounting feet 151 provided on the mounting plate 15 can facilitate the installation of the main body housing 12.

[0027] One end of the clip 14 on the upper cover shell 120 extends into the groove 13. Therefore, when the mounting plate 15 is engaged in the groove 13 of the main body shell 12, the clip 14 will be firmly pressed against the groove 13. This enables the upper cover shell 120 to be fixed to the main body shell 12 again through the clip 14 in addition to being fixed by glue, thereby preventing the upper cover shell 120 from separating or detaching from the main body shell 12, effectively avoiding water ingress during the use of the nitrogen-oxygen sensor due to the separation of the upper cover shell 120 from the main body shell 12 and affecting the normal operation of the circuit board in the main body shell 12.

[0028] The main body shell 12 is respectively provided with a first plug connector 121 and a second plug connector 122. The wiring harness 11 is connected to the first plug connector 121, and the second plug connector 122 is used to connect to the vehicle's on-board computer or wiring plug.

[0029] A boss 131 is provided in the groove 13 of the main body shell 12, and ribs 132 are provided on both sides of the groove 13. A card slot 134 is formed between the boss 131 and the ribs 132; a clamping block 152 is fixedly connected to the bottom surface of the mounting plate 15, and the clamping block 152 corresponds to the card slot 134, so that the mounting plate 15 can be firmly engaged on the main body shell 12;

[0030] It should be understood that the clamping block 152 and the card slot 134 are connected by interference fit.

[0031] The side arm 141 on the clip 14 is in contact with the side surface of the main body shell 12, the cross arm 142 on the clip 14 is in contact with the bottom surface of the main body shell 12, and the bent end 143 of the clip 14 is located in the card slot 134, which enables the clip 14 to firmly fix between the upper cover shell 120 and the main body shell 12.

[0032] A positioning groove 133 is provided on the boss 131, and a positioning block 153 is fixedly connected to the bottom surface of the mounting plate 15. The positioning block 153 corresponds to the positioning groove 133. By providing the positioning block 153 on the mounting plate 15, the mounting plate 15 can be quickly aligned with the groove 13 of the main body shell 12, thereby improving the installation efficiency.

[0033] Alignment grooves 135 are provided on both sides of the main body shell 12 where the groove 13 is located. The clip 14 corresponds to the alignment grooves 135, which enables the upper cover shell 120 to be firmly limited on the main body shell 12 through the clip 14 and prevents the upper cover shell 120 from being skewed on the main body shell 12.

[0034] The mounting feet 151 on the mounting plate 15 correspond to the cross arm 142 of the clip 14. The mounting feet 151 are in contact with the cross arm 142 of the clip 14 and cover part of the cross arm 142, which can prevent part of the cross arm 142 of the clip 14 from being damaged.

[0035] Both the raised strip 132 and the mounting plate 15 are provided with screw holes 136, which further facilitates the connection between the mounting plate 15 and the main body housing 12 by using screws.

[0036] In the present utility model, when the mounting plate 15 is engaged in the groove 13 of the main body housing 12, the clamping piece 14 will be firmly pressed against the groove 13. This enables the upper cover shell 120 to be fixed to the main body housing 12 not only by glue but also by the clamping piece 14 once again, thereby preventing the upper cover shell 120 from separating or detaching from the main body housing 12. Effectively avoid water ingress during the use of the nitrogen-oxygen sensor due to the separation of the upper cover shell 120 from the main body housing 12, which affects the normal operation of the circuit board in the main body housing 12, and the installation feet 151 are provided to facilitate the installation of the main body housing 12.

[0037] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of the present utility model can make some changes or modifications to equivalent embodiments by using the technical content prompted above within the scope of the technical solution of the present utility model. However, as long as the content does not depart from the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the present utility model.

Claims

1. A quick-install plastic-shaped nitrogen oxide sensor, comprising a sensor head (1) connected to a main body housing (12) through a wire harness (11), characterized in that, Further included are: An upper cover shell (120) snap - connected to the main body shell (12); A groove (13) opened on a surface of the main body shell (12) away from the upper cover shell (120); A clip (14) with one end connected to the upper cover shell (120), the clip (14) being symmetrically arranged on the upper cover shell (120), and one end of the clip (14) extending into the groove (13); A mounting plate (15) snap - connected to the groove (13). When the mounting plate (15) is snap - connected to the groove (13) of the main body shell (12), the mounting plate (15) presses the clip (14) located in the groove (13), and through the clip (14), the upper cover shell (120) is in close contact with the main body shell (12); Mounting feet (151) symmetrically and fixedly connected to both sides of the mounting plate (15) respectively.

2. The quick-installation plastic-encased nitrogen-oxygen sensor according to claim 1, characterized in that, First plug connectors (121) and second plug connectors (122) are respectively arranged on the main body shell (12).

3. The quick-installation plastic-shaped nitrogen-oxygen sensor according to claim 1, characterized in that, A boss (131) is arranged in the groove (13) of the main body shell (12), and ribs (132) are arranged on both sides of the groove (13). A card slot (134) is formed between the boss (131) and the ribs (132); A block (152) is fixedly connected to the bottom surface of the mounting plate (15), and the block (152) corresponds to the card slot (134).

4. A quick-installable plastic-shaped nitrogen-oxygen sensor according to claim 3, characterized in that, The side arm (141) on the clip (14) is in contact with the side surface of the main body shell (12), the cross - arm (142) on the clip (14) is in contact with the bottom surface of the main body shell (12), and the bent end (143) of the clip (14) is located in the card slot (134).

5. A quick-installation plastic-encased nitrogen-oxygen sensor according to claim 4, characterized in that, A positioning groove (133) is arranged on the boss (131), and a positioning block (153) is fixedly connected to the bottom surface of the mounting plate (15), and the positioning block (153) corresponds to the positioning groove (133).

6. The quick-installable plastic-encased nitrogen-oxygen sensor according to claim 4, characterized in that, Alignment grooves (135) are opened on both sides of the main body shell (12) where the groove (13) is located, and the clip (14) corresponds to the alignment grooves (135).

7. The quick-installation plastic-shaped nitrogen oxide sensor according to claim 6, characterized in that, The mounting feet (151) on the mounting plate (15) correspond to the cross - arm (142) of the clip (14).

8. The quick-installable plastic-encased nitrogen-oxygen sensor according to claim 7, characterized in that, Screw holes (136) are opened on both the rib (132) and the mounting plate (15).

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