Detachable oxygen sensor

Abstract

The utility model relates to the technical field of oxygen sensors, in particular to a detachable oxygen sensor which comprises a sensor body, a fixing head is fixedly connected to one end of the sensor body, a detection head is arranged in the middle of the fixing head, and a power connection end is arranged at the end, away from the detection head, of the sensor body. A protective sleeve is arranged outside the detection head, and a dismounting mechanism is arranged between the protective sleeve and the fixed head. The inserting grooves are formed in the outer wall of the end of the fixing head in an equal-radian mode, the edge grooves are formed in one sides of the tail ends of the inserting grooves, the inserting strips are arranged at the end of the protective sleeve in an equal-radian mode, the positioning blocks are arranged at the front ends of the inserting strips, and the positioning sleeve is movably connected to the outer portion of the fixing head in a sleeved mode, so that the protective sleeve can be easily detached when needing to be cleaned. When the outside of the protective sleeve is stained with dirt such as greasy dirt or dust, the protective sleeve can be quickly taken down for thorough cleaning, and the influence of long-term accumulation of dirt on the detection performance of the sensor is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to oxygen sensor technical field, concretely is a detachable oxygen sensor. BACKGROUND

[0002] On the engine using three-way catalytic converter to reduce exhaust pollution, oxygen sensor is indispensable element, because the air-fuel ratio of mixture once deviates from the theoretical air-fuel ratio, the purification ability of three-way catalyst to CO and HC will sharply drop, so installs oxygen sensor in the exhaust pipe, to detect the concentration of oxygen in exhaust, and sends feedback signal to ECU, again by ECU control oil sprayer injection amount increase and decrease, thereby the air-fuel ratio of mixture is controlled near the theoretical value.

[0003] As the oxygen sensor disclosed in the authorized announcement No. CN202870021U, it includes fixed pin ceramic piece, upper shield, electrode pin, upper ceramic piece, shell, lower ceramic piece, zirconia chip, outer protective cover, inner protective cover and the like, wherein the electrode pin is externally provided with the fixed pin ceramic piece, the top end of the zirconia chip is fixed with the lower end of the electrode pin, talcum powder is arranged between the upper ceramic piece and the lower ceramic piece, the inner protective cover is arranged inside the outer protective cover, and the upper shield and the outer protective cover are respectively riveted and fixed with the shell. After adopting the above technical scheme, the utility model has the beneficial effects of optimizing product structure, facilitating product assembly, good product reliability under harsh working conditions, and greatly improving product service life.

[0004] Although the above patent has greatly improved service life, the upper shield and the outer protective cover are respectively riveted and fixed with the shell, so that disassembly is relatively difficult. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a detachable oxygen sensor to solve the problems in the above background art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A detachable oxygen sensor, comprising

[0008] A sensor body, a fixed head is fixedly connected to one end of the sensor body, a detection head is arranged in the middle of the fixed head, and an electricity connection end is arranged at the end of the sensor body away from the detection head;

[0009] A protective sleeve is arranged outside the detection head, and a dismounting mechanism is arranged between the protective sleeve and the fixed head.

[0010] Preferably, the dismounting mechanism comprises a plurality of insertion grooves arranged in an arc shape at the outer wall of the end of the fixing head, a side groove arranged laterally at the tail end of the insertion groove, a plurality of insertion strips arranged in an arc shape at the end of the protective sleeve, and a positioning block arranged at the front end of the insertion strip.

[0011] Preferably, the dismounting mechanism further comprises a positioning sleeve movably sleeved on the outside of the fixing head, a plurality of positioning grooves arranged in an arc shape at the inner wall of the positioning sleeve, and a spring arranged between the outside of the positioning sleeve and the fixing head.

[0012] Preferably, a plurality of through grooves are arranged in an arc shape at the outer wall of the protective sleeve, and the through grooves are in a strip structure with a semicircular structure at both ends.

[0013] Preferably, a fixing sleeve is arranged at the tail end of the outer wall of the fixing head, and a threaded groove is arranged at the front end of the outer wall of the fixing head and close to the fixing sleeve.

[0014] Preferably, a hexagonal stud is arranged at the middle of the outer wall of the sensor body.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The dismountable oxygen sensor, the insertion grooves arranged in an arc shape at the outer wall of the end of the fixing head, the side groove at the tail end of the insertion groove, the insertion strips arranged in an arc shape at the end of the protective sleeve and the positioning block at the front end of the insertion strip, and the positioning sleeve movably sleeved on the outside of the fixing head, so that the protective sleeve can be easily dismounted when cleaning is needed, for example, when the outside of the protective sleeve is contaminated by oil stains or dust, the protective sleeve can be quickly removed for thorough cleaning, thereby avoiding the influence of long-term accumulation of dirt on the detection performance of the sensor.

[0017] 2. The dismountable oxygen sensor, a plurality of through grooves are arranged in an arc shape at the outer wall of the protective sleeve, and the through grooves are in a strip structure with a semicircular structure at both ends, so that there is no cleaning dead angle when cleaning dirt, thereby ensuring the cleaning degree of the protective sleeve, the clean protective sleeve does not interfere with the detection of the detection head, and the detection head can more accurately detect the oxygen content and other parameters in the environment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole front view structure schematic diagram of the utility model;

[0019] Figure 2 It is an electricity connection end structure schematic diagram of the utility model;

[0020] Figure 3 It is a through groove structure schematic diagram of the utility model;

[0021] Figure 4For the present utility model Figure 1 Enlarged view of point A in the middle;

[0022] Figure 5 For the present utility model Figure 2 Enlarged diagram of point B in the middle.

[0023] In the diagram: 1. Sensor body; 2. Fixing head; 3. Detection head; 4. Power terminal; 5. Protective sleeve; 6. Slot; 7. Side groove; 8. Insert; 9. Positioning block; 10. Positioning sleeve; 11. Positioning groove; 12. Spring; 13. Through groove; 14. Fixing sleeve; 15. Threaded groove; 16. Hexagonal bolt head. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-5 As shown, this utility model provides a technical solution:

[0026] A detachable oxygen sensor includes a sensor body 1, a fixing head 2 fixedly connected to one end of the sensor body 1, a detection head 3 provided in the middle of the fixing head 2, a power terminal 4 provided at the end of the sensor body 1 away from the detection head 3, a protective sleeve 5 provided on the outside of the detection head 3, a plurality of through grooves 13 with equal arc on the outer wall of the protective sleeve 5, the two ends of the through grooves 13 having a semi-circular structure, a fixing sleeve 14 provided on the outer wall of the tail end of the fixing head 2, a threaded groove 15 provided on the outer wall of the fixing head 2 and near the front end of the fixing sleeve 14, and a hexagonal bolt head 16 provided on the outer wall of the middle part of the sensor body 1.

[0027] In this embodiment, the outer wall of the protective sleeve 5 is provided with several through grooves 13 at equal arcs, and the through grooves 13 are strip structures with semi-circular structures at both ends. This prevents the formation of cleaning dead corners when cleaning dirt, ensuring the cleanliness of the protective sleeve 5. A well-cleaned protective sleeve 5 will not interfere with the detection of the detection head 3, enabling the detection head 3 to more accurately detect parameters such as oxygen content in the environment.

[0028] like Figure 3 , Figure 4 and Figure 5As shown, the dismounting mechanism is arranged between the protective sleeve 5 and the fixing head 2, and comprises the insertion grooves 6, the edge grooves 7, the insertion strips 8, the positioning blocks 9, the positioning sleeve 10 and the springs 12.

[0029] In the embodiment, the insertion grooves 6 arranged at the outer wall of the end of the fixing head 2, the edge grooves 7 at the tail end of the insertion grooves 6, the insertion strips 8 arranged at the end of the protective sleeve 5, the positioning blocks 9 at the front end of the insertion strips 8, the positioning sleeve 10 movably sleeved on the outside of the fixing head 2 and the springs 12 between the positioning sleeve 10 and the outside of the fixing head 2 are arranged, so that the protective sleeve 5 can be easily dismounted when it needs to be cleaned, for example, when the outside of the protective sleeve 5 is contaminated by oil stains or dust, the protective sleeve 5 can be quickly removed for thorough cleaning, so as to avoid that the detection performance of the sensor is affected by long-term accumulation of dirt.

[0030] Working principle: when dismounting, the positioning sleeve 10 is pushed to one side of the threaded groove 15 and the spring 12 is compressed, the protective sleeve 5 is rotated after the positioning grooves 11 at the inner wall of the positioning sleeve 10 are separated from the positioning blocks 9, the protective sleeve 5 is moved from the edge groove 7 to the insertion groove 6 when the protective sleeve 5 is rotated, and then the protective sleeve 5 is dismounted from the outside of the fixing head 2 by pulling the positioning sleeve 10 outward; the through groove 13 is arranged on the outside of the protective sleeve 5, the through groove 13 has a strip-shaped structure, and both ends are semicircular structures, so that there is no cleaning dead angle when cleaning dirt in the later period.

[0031] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, the above embodiments and the description in the specification are only preferred examples of the utility model, and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A detachable oxygen sensor characterized by: The utility model relates to a sensor body (1) is connected with the fixed head (2) in one end, is provided with the detection head (3) in the middle part of fixed head (2), is provided with the electricity connection end (4) in the end away from detection head (3) of sensor body (1). The utility model discloses a sensor body (1) is connected with the fixed head (2) in one end, is provided with the detection head (3) in the middle part of fixed head (2), is provided with the electricity connection end (4) in the end away from detection head (3) of sensor body (1). The utility model discloses a sensor body (1) is connected with the fixed head (2) in one end, is provided with the detection head (3) in the middle part of fixed head (2), is provided with the electricity connection end (4) in the end away from detection head (3) of sensor body (1).

2. A removable oxygen sensor according to claim 1, wherein: The utility model discloses a sensor body (1) is connected with the fixed head (2) in one end, is provided with the detection head (3) in the middle part of fixed head (2), is provided with the electricity connection end (4) in the end away from detection head (3) of sensor body (1).

3. A removable oxygen sensor according to claim 2, wherein: The utility model discloses a sensor body (1) is connected with the fixed head (2) in one end, is provided with the detection head (3) in the middle part of fixed head (2), is provided with the electricity connection end (4) in the end away from detection head (3) of sensor body (1).

4. A removable oxygen sensor according to claim 2, wherein: The utility model discloses a sensor body (1) is connected with the fixed head (2) in one end, is provided with the detection head (3) in the middle part of fixed head (2), is provided with the electricity connection end (4) in the end away from detection head (3) of sensor body (1).

5. The detachable oxygen sensor of claim 1, wherein: The utility model discloses a sensor body (1) is connected with the fixed head (2) in one end, is provided with the detection head (3) in the middle part of fixed head (2), is provided with the electricity connection end (4) in the end away from detection head (3) of sensor body (1).

6. The detachable oxygen sensor of claim 1, wherein: The utility model discloses a sensor body (1) is connected with the fixed head (2) in one end, is provided with the detection head (3) in the middle part of fixed head (2), is provided with the electricity connection end (4) in the end away from detection head (3) of sensor body (1).

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