Heat dissipation structure of wire harness connecting end of exhaust temperature sensor

Abstract

The utility model relates to a heat radiation structure of an exhaust temperature sensor wire harness connecting end, comprising a connecting cable, one end of which is connected with a chip used for measuring temperature; the transmission cables are connected through a connecting part, and a heat dissipation part is arranged outside the connecting part in a sleeving mode; the heat dissipation component comprises a heat dissipation sleeve and a plurality of heat dissipation fins, the heat dissipation sleeve is arranged on the connecting component in a sleeving mode, the heat dissipation fins are arranged on the outer wall of the heat dissipation sleeve in parallel, and the heat dissipation fins are used for heat dissipation at the position of the connecting component. According to the heat dissipation structure of the wire harness connecting end of the exhaust temperature sensor, the plurality of sheets with larger outer diameters, namely the heat dissipation fins, are arranged at certain intervals, so that high temperature in an environment can be effectively dispersed, the temperature is obviously reduced when the high temperature is transmitted to the interior of a connecting part, and the temperature can be reduced to the temperature resistance upper limit of other parts in the connecting part; therefore, parts in the connecting part are protected against high-temperature melting and carbonization, and product failure is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a heat dissipation structure for a wire harness connection end of an exhaust gas temperature sensor. Background Art

[0002] Exhaust gas temperature sensors are mainly applied to the aftertreatment system of vehicles. Affected by the exhaust gas temperature and the exhaust pipe ambient temperature, sufficient consideration needs to be given in terms of structural design and raw material selection. For example, Figure 7 as shown, the temperature at the sensor probe area can reach up to 950 °C ( Figure 7 at point A in Figure 7 ), the temperature at the flange and nut area can reach up to 600 °C ( Figure 7 at point B in

[0003] ), and the temperature of the wire harness connection pipe can reach 260 °C (

[0004] at point C in Summary of the Utility Model

[0005] Therefore, the technical problem to be solved by the present utility model is to overcome the problem that the current solution of the exhaust gas temperature sensor in the prior art cannot meet the use requirements of special vehicles.

[0006] To solve the above technical problems, the present utility model provides a heat dissipation structure for the wire harness connection end of an exhaust gas temperature sensor, comprising: a connection cable, one end of which is connected with a chip for temperature measurement; a transmission cable, between one end of which and the other end of the connection cable far from the chip, there is a connection component, the connection cable and the transmission cable are connected through the connection component, and the outside of the connection component is sleeved with a heat dissipation component; the heat dissipation component includes a heat dissipation sleeve and a plurality of heat dissipation fins, the heat dissipation sleeve is sleeved on the connection component, the plurality of heat dissipation fins are arranged in parallel on the outer wall of the heat dissipation sleeve, and the plurality of heat dissipation fins are used for heat dissipation at the position of the connection component. The heat dissipation structure for the wire harness connection end of the exhaust gas temperature sensor of the present utility model enables that when the sensor is used in an ultra-high temperature environment, the heat will not be completely conducted to the inside of the wire harness connection area.

[0007] In an embodiment of the present utility model, the heat dissipation fins are in a circular ring shape and are concentrically arranged with the heat dissipation sleeve, and the plurality of heat dissipation fins are fixedly arranged on the outer wall of the heat dissipation sleeve at equal intervals.

[0008] In an embodiment of the present utility model, the connection component includes a support block, an insulating buckle, an inner layer sleeve and an outer layer sleeve, the support block is located between the connection cable and the transmission cable, the insulating buckle is arranged on the support block, one end of the core wire of the connection cable and one end of the core wire of the transmission cable are both arranged on the insulating buckle, the inner layer sleeve is sleeved on one end of the transmission cable close to the connection cable, the outer layer sleeve is sleeved on the inner layer sleeve, and one end of the outer layer sleeve extends out of the inner layer sleeve and is sleeved on the connection cable, and the heat dissipation sleeve is sleeved on the outer layer sleeve.

[0009] In an embodiment of the present utility model, the inner diameter of the heat dissipation sleeve and the outer diameter of the outer layer sleeve are in clearance fit.

[0010] In an embodiment of the present utility model, the connection positions at both ends of the heat dissipation sleeve in the axial direction and the outer wall of the outer layer sleeve are fixed by laser welding.

[0011] In an embodiment of the present utility model, the material of the inner layer sleeve is polytetrafluoroethylene.

[0012] In an embodiment of the present utility model, the material of the outer layer sleeve is 304 stainless steel.

[0013] In an embodiment of the present utility model, the inner layer sleeve is in a cylindrical shape, and there is a gap between one end of the inner layer sleeve far from the transmission cable and the connection cable.

[0014] In an embodiment of the present utility model, the materials of both the heat dissipation sleeve and the plurality of heat dissipation fins are SUS304.

[0015] In an embodiment of the present utility model, a hexagonal nut is provided on the outer wall of the connecting cable.

[0016] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0017] The heat dissipation structure of the exhaust gas temperature sensor harness connection end of the present utility model is composed of a plurality of thin sheets with a larger outer diameter, namely heat dissipation fins, arranged at a certain interval, which can effectively disperse the high temperature in the environment, so that the high temperature is significantly reduced when it is transmitted to the inside of the connection component, and the temperature can be reduced to within the temperature resistance upper limit of other components inside the connection component, thereby protecting the components inside the connection component from being melted and carbonized by high temperature and preventing product failure. Description of the Drawings

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further detailed description of the present utility model is made according to the specific embodiments of the present utility model in conjunction with the drawings, wherein

[0019] Figure 1 is a schematic structural diagram of the heat dissipation structure of the exhaust gas temperature sensor harness connection end in the preferred embodiment of the present utility model;

[0020] Figure 2 is a front view of the heat dissipation structure of the exhaust gas temperature sensor harness connection end in the preferred embodiment of the present utility model;

[0021] Figure 3 is a sectional view taken along the line A-A in the preferred embodiment of the present utility model;

[0022] Figure 4 is a sectional view taken along the line B-B in the preferred embodiment of the present utility model;

[0023] Figure 5 is a schematic structural diagram of the heat dissipation component in the preferred embodiment of the present utility model;

[0024] Figure 6 is a partial schematic structural diagram of the connection component in the preferred embodiment of the present utility model;

[0025] Figure 7 is a schematic structural diagram of the exhaust gas temperature sensor harness connection end in the prior art.

[0026] Explanation of the reference numerals in the drawings: connecting cable 1, hexagonal nut 11, protective sleeve 12, transmission cable 2, connection component 3, support block 31, insulating buckle 32, inner sleeve 33, outer sleeve 34, heat dissipation component 4, heat dissipation sleeve 41, heat dissipation fin 42. Detailed Description of the Invention

[0027] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the cited embodiments do not limit the present utility model.

[0028] Referring to Figures 1-5 As shown, the heat dissipation structure of the exhaust gas temperature sensor wire harness connection end of the present utility model includes several parts: a connection cable 1, a transmission cable 2, a connection component 3, and a heat dissipation component 4; one end of the connection cable 1 is connected with a chip for temperature measurement; for the transmission cable 2, a connection component 3 is provided between one end of it and the other end of the connection cable 1 far from the chip. The connection cable 1 and the transmission cable 2 are connected through the connection component 3, and the outside of the connection component 3 is sleeved with a heat dissipation component 4; the heat dissipation component 4 includes a heat dissipation sleeve 41 and a plurality of heat dissipation fins 42. The heat dissipation sleeve 41 is sleeved on the connection component 3, and the plurality of heat dissipation fins 42 are arranged in parallel on the outer wall of the heat dissipation sleeve 41, and the plurality of heat dissipation fins 42 are used for heat dissipation at the position of the connection component 3.

[0029] After the above design has passed the 300 °C high-temperature durability verification and customer road test, the sensor function is qualified, and there is no melting or carbonization phenomenon in the disassembled parts. By increasing the number of heat dissipation fins 42, the heat dissipation effect of the wire harness connection end is improved, and the cost is controlled within an acceptable range. The fixing method of the heat dissipation sleeve 41 and the plurality of heat dissipation fins 42 structure is mature and is conducive to implementation.

[0030] Referring to Figure 5 As shown, the materials of the heat dissipation sleeve 41 and the plurality of heat dissipation fins 42 are both SUS304. The heat dissipation fins 42 are in a circular ring shape, and the heat dissipation fins 42 are concentrically arranged with the heat dissipation sleeve 41. The plurality of heat dissipation fins 42 are fixedly arranged on the outer wall of the heat dissipation sleeve 41 at equal intervals. The radial direction of the heat dissipation fins 42 is arranged along the radial cross-section of the heat dissipation sleeve 41. Thus, a heat dissipation structure of a plurality of neatly arranged heat dissipation fins 42 is formed.

[0031] In the above structure, the connection component 3 includes a support block 31, an insulating buckle 32, an inner layer sleeve 33, and an outer layer sleeve 34. The support block 31 is located between the connection cable 1 and the transmission cable 2. The insulating buckle 32 is arranged on the support block 31. One end of the core wire of the connection cable 1 and one end of the core wire of the transmission cable 2 are both arranged on the insulating buckle 32. The inner layer sleeve 33 is sleeved on one end of the transmission cable 2 close to the connection cable 1. The outer layer sleeve 34 is sleeved on the inner layer sleeve 33, and one end of the outer layer sleeve 34 extends out of the inner layer sleeve 33 and is sleeved on the connection cable 1. The heat dissipation sleeve 41 is sleeved on the outer layer sleeve 34, and the inner diameter of the heat dissipation sleeve 41 and the outer diameter of the outer layer sleeve 34 are in clearance fit. The inner diameter of the heat dissipation sleeve 41 and the maximum outer diameter of the outer layer sleeve 34 form a clearance fit.

[0032] In the above structure, the support block 31 is composed of two rectangular flat plates perpendicular to each other, and the two rectangular flat plates are arranged in a T shape.

[0033] In the above structure, the outer sleeve 34 is made of 304 stainless steel. The connection positions at both ends of the heat dissipation sleeve 41 in the axial direction with the outer wall of the outer sleeve 34 are fixed by laser welding.

[0034] In the above structure, the inner sleeve 33 is made of polytetrafluoroethylene. The inner sleeve 33 is cylindrical, and there is a gap between the end of the inner sleeve 33 far from the transmission cable 2 and the connection cable 1.

[0035] Referring to Figure 6 As shown, the insulating buckle 32 is entirely made of insulating material, and the insulating buckle 32 includes a circular sleeve one 333 connected to the transmission cable 2 and a circular sleeve two 322 connected to the connection cable 1. A connecting piece 321 is provided between the circular sleeve one 333 and the circular sleeve two 322. The circular sleeve one 333 is sleeved on the core wire of the transmission cable 2, and the circular sleeve two 322 is sleeved on the core wire of the connection cable 1. The ends of the core wire of the connection cable 1 and the core wire of the transmission cable 2 between the insulating buckles 32 are in a disconnected state. An opening 334 is provided on the side wall of the circular sleeve two 322 in the axial direction.

[0036] In the above structure, a hexagon nut 11 is provided on the outer wall of the connection cable 1, which facilitates the installation of the automotive exhaust gas temperature sensor. A protective sleeve 12 is sleeved on the end of the connection cable 1 where the chip is located, and the protective sleeve 12 covers the outside of the chip to protect the chip.

[0037] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A heat dissipation structure of an exhaust temperature sensor harness connection end, characterized in that: include, A connecting cable, one end of which is connected to a chip for temperature measurement; A transmission cable, one end of which is provided with a connecting component between the other end of the connecting cable away from the chip, the connecting cable and the transmission cable are connected by the connecting component, and a heat dissipation component is provided on the outside of the connecting component; The heat dissipation component comprises a heat dissipation sleeve and a plurality of heat dissipation fins. The heat dissipation sleeve is sleeved on the connecting component. The plurality of heat dissipation fins are arranged in parallel on the outer wall of the heat dissipation sleeve. The plurality of heat dissipation fins are used for heat dissipation at the connecting component position.

2. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 1, characterized in that: The heat dissipation fins are in a circular ring shape and are arranged concentrically with the heat dissipation sleeve. The plurality of heat dissipation fins are fixedly arranged on the outer wall of the heat dissipation sleeve at equal intervals.

3. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 2, characterized in that: The connecting component includes a support block, an insulating buckle, an inner sleeve and an outer sleeve. The support block is located between the connecting cable and the transmission cable. The insulating buckle is arranged on the support block. One end of the core wire of the connecting cable and one end of the core wire of the transmission cable are both arranged on the insulating buckle. The inner sleeve is sleeved on one end of the transmission cable close to the connecting cable. The outer sleeve is sleeved on the inner sleeve, and one end of the outer sleeve extends out of the inner sleeve and is sleeved on the connecting cable. The heat dissipation sleeve is sleeved on the outer sleeve.

4. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 3, characterized in that: The inner diameter of the heat dissipation sleeve and the outer diameter of the outer sleeve are clearance matched.

5. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 4, characterized in that: The connection positions of the two ends of the heat dissipation sleeve in the axial direction and the outer wall of the outer sleeve are fixed by laser welding.

6. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 3, characterized in that: The material of the inner sleeve is polytetrafluoroethylene.

7. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 6, characterized in that: The outer sleeve is made of 304 stainless steel.

8. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 6, characterized in that: The inner sleeve is cylindrical, and a gap is provided between an end of the inner sleeve away from the transmission cable and the connection cable.

9. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 1, characterized in that: The heat dissipation sleeve and the plurality of heat dissipation fins are all made of SUS304.

10. The heat dissipation structure of the exhaust temperature sensor harness connection end according to claim 1, characterized in that: A hexagonal nut is arranged on the outer wall of the connecting cable.

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