Sensor wire harness heat insulation protection structure

Abstract

The utility model discloses a sensor wire harness heat insulation protection structure which comprises a rear oxygen sensor, a wire harness, an EGR cooler gas taking pipe, a cylinder cover and a cylinder body, the cylinder cover is installed on the top of the cylinder body, and the EGR cooler gas taking pipe is installed on the exhaust side of the cylinder body and between a turbine rear pipe and the cylinder body; the rear oxygen sensor is further mounted on the upper side of the vortex rear pipe; the lower end of the wiring harness is connected with the rear oxygen sensor, the upper portion of the wiring harness crosses the EGR cooler gas taking pipe and extends towards the cylinder body side, the wiring harness support comprises a U-shaped support and a supporting rod, and the U-shaped support is fixed to the cylinder cover through a bolt; the lower end of the supporting rod is fixed on the U-shaped bracket, and the upper end of the supporting rod supports the middle part of the wire harness; the outer side of a wire harness body between the lower end of the wire harness and the supporting rod is wrapped with the heat insulation cotton. The utility model has the advantages of simple structure, good heat insulation effect, effective wire harness protection and the like.

Description

Technical Field

[0001] This utility model relates to the field of engine wiring harness arrangement technology, and in particular to a heat insulation protection structure for sensor wiring harnesses. Background Technology

[0002] Due to structural differences in the turbocharger intake pipe and other components from different manufacturers, L-shaped support rods are stacked on bolts to fix the sensor harness. When forcibly straightened, there is a 3-5mm gap between the rear oxygen sensor harness and the EGR cooler intake pipe. However, after softening at high temperatures, it may touch the EGR cooler intake pipe.

[0003] In the existing technology, after the heat insulation sleeve test, the adhesive fails due to high temperature and the outer aluminum foil separates from the glass fiber. Because it is not fixed, the area near the sensor seat is severely damaged.

[0004] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The main purpose of this utility model is to propose a heat insulation protection structure that is simple in structure, has good heat insulation effect, and can effectively protect the wire harness.

[0006] Therefore, this utility model proposes a heat insulation protection structure for sensor wiring harnesses.

[0007] Preferably, the present invention may also have the following technical features:

[0008] A sensor wiring harness heat insulation protection structure includes a rear oxygen sensor, a wiring harness, an EGR cooler intake pipe, a cylinder head, and a cylinder block. The cylinder head is mounted on top of the cylinder block, and the EGR cooler intake pipe is installed on the exhaust side of the cylinder block, between the afterspindle and the cylinder block. The afterspindle is installed at a lower height than the EGR cooler intake pipe, and the rear oxygen sensor is also mounted on its upper side. The lower end of the wiring harness is connected to the rear oxygen sensor, and its upper part crosses the EGR cooler intake pipe and extends towards the cylinder block. The structure is characterized by further including a wiring harness bracket and heat insulation cotton. The wiring harness bracket includes a U-shaped bracket and a support rod. The U-shaped bracket is fixed to the cylinder head by bolts. The lower end of the support rod is fixed to the U-shaped bracket, and its upper end supports the middle part of the wiring harness. The outer side of the wiring harness between the lower end and the support rod is wrapped with the heat insulation cotton.

[0009] Furthermore, the U-shaped bracket includes a horizontal plate and side plates connected to both ends of the horizontal plate, wherein the horizontal plate is bolted to the cylinder head, and the lower sides of the two side plates abut against the upper side of the EGR cooler.

[0010] Furthermore, the support rod has an L-shaped structure.

[0011] Furthermore, the wire harness is secured to the upper part of the support rod with nylon cable ties.

[0012] Furthermore, the lower end of the support rod is attached to the horizontal plate and the two side plates.

[0013] Furthermore, the insulation cotton is secured with press-type metal buttons.

[0014] Furthermore, the insulation cotton has three layers, wherein the inner layer is fiberglass cloth, the middle layer is non-woven fiberglass cloth, and the outer layer is made of metal cloth.

[0015] Furthermore, the fiberglass cloth, non-woven fabric, and metal cloth are sewn together with 304 sewing thread.

[0016] Furthermore, the fiberglass cloth is turned outward and bonded to the metal cloth to form an edge, ensuring that the edge of the metal cloth will not be cut.

[0017] The bottom of the heat insulation cotton is wrapped around the outside of the rear oxygen sensor, and the part where the heat insulation cotton and the rear oxygen sensor come into contact is provided with only one layer of the metal cloth.

[0018] The advantages of this invention compared to existing technologies include: the wire harness bracket and sensor holder securely hold the insulation cotton in place, preventing it from shifting. Simultaneously, the wire harness bracket supports the wire harness at a high position, preventing it from softening at high temperatures and touching the EGR cooler. The area where the insulation cotton contacts the rear oxygen sensor is only covered with one layer of the aforementioned metal cloth. This metal cloth effectively dissipates heat, preventing the wire harness from melting due to high temperatures or abnormal air leakage from the rear oxygen sensor. Attached Figure Description

[0019] Figure 1 and Figure 2 This is a schematic diagram of the structure of this utility model.

[0020] Figure 3 This is a front view of the heat insulation cotton of this utility model.

[0021] Figure 4 This is a cross-sectional view of the insulation cotton. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0023] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0024] like Figures 1-4 The diagram illustrates a sensor wiring harness heat insulation protection structure, comprising a rear oxygen sensor 5, a wiring harness 8, an EGR cooler intake pipe 3, a cylinder head 1, and a cylinder block. The cylinder head 1 is mounted on the top of the cylinder block. The EGR cooler intake pipe 3 is installed on the exhaust side of the cylinder block, between the scroll compressor 4 and the cylinder block. The scroll compressor 4 is installed at a lower height than the EGR cooler intake pipe 3, and the rear oxygen sensor 5 is mounted on its upper side. The lower end of the wiring harness 8 is connected to the rear oxygen sensor 5, and its upper part spans... The air intake pipe 3 of the EGR cooler extends towards the cylinder block, with a 3-5cm gap between its middle section and the air intake pipe 3 of the EGR cooler. The improvement lies in the inclusion of a wiring harness bracket and heat insulation cotton 6. The wiring harness bracket includes a U-shaped bracket 92 and an L-shaped support rod 91. The bottom horizontal plate of the U-shaped bracket has a connecting hole for connecting to the cylinder head 1 and is fixed to the cylinder head 1 by bolts 93. The lower end of the L-shaped support rod 91 is fixed to the U-shaped bracket 92, and the upper end supports the middle of the wiring harness 8. The heat insulation cotton 6 is wrapped around the outer side of the wiring harness between the lower end of the wiring harness 8 (the end near the rear oxygen sensor 5) and the L-shaped support rod 91. The heat insulation cotton 6 is secured front and back by the bracket and sensor seat to prevent it from shifting and affecting the heat insulation effect.

[0025] Specifically, the U-shaped bracket 92 includes a horizontal plate and side plates connected to both ends of the horizontal plate. The horizontal plate has connecting holes and is connected to the cylinder head 1 via bolts 93. The lower sides of the two side plates abut against the upper side of the EGR cooler 2. The U-shaped bracket 92 abuts against the EGR cooler 2, preventing rotation and confining the L-shaped bracket 91 between the two side plates, preventing the L-shaped support rod 91 from swinging. Nylon cable ties 63 are used to secure the wiring harness 8 to the L-shaped support rod 91. The heat insulation cotton 6 is secured with push-button metal buttons 62 to prevent it from loosening and to facilitate installation and adjustment. The push-button metal buttons 62 are existing products, including male and female buttons. The heat insulation cotton 6 is wrapped around the sensor wiring harness 8, and the male and female buttons of the push-button metal buttons 62 are then fastened together to secure the heat insulation cotton 6.

[0026] Preferably, the lower end of the L-shaped support rod 91 is fitted to the cross plate and has a mounting hole coaxial with the connecting hole. A bolt 93 is passed through the mounting hole and the connecting hole and then tightened onto the pre-drilled hole in the cylinder head 1, fixing the L-shaped support rod 91 and the U-shaped bracket 92 to the cylinder head 1. The L-shaped structure provides greater extension space for the support rod, facilitating the support of the wiring harness 8. Furthermore, the lower sides of the L-shaped support rod 91 are fitted to or have a small gap with the two side plates of the U-shaped bracket 92, preventing the L-shaped support rod from swaying or loosening.

[0027] Reference Figure 3 The heat insulation cotton 6 has three layers: an inner layer of fiberglass cloth 66, a middle layer of fiberglass nonwoven fabric 65, and an outer layer of metal cloth 66. The fiberglass cloth 66, nonwoven fabric 65, and metal cloth 66 are sewn together with 304 stainless steel thread. Specifically, the metal cloth 66 is heat-resistant to 600℃, and the fiberglass cloth 6 is heat-resistant to 550℃, ensuring that the bottom of the heat insulation cotton 6, near the high-temperature lining, can withstand a temperature of 600℃.

[0028] In reference Figure 4 The fiberglass cloth 64 is folded outwards and bonded to the metal cloth 66 to form an edging, ensuring that the edge of the metal cloth 66 will not be cut. That is, the area of ​​the inner fiberglass cloth 66 is larger than the area of ​​the metal cloth 66, and the inner fiberglass cloth 64 is folded outwards and bonded to the metal cloth 66, using the fiberglass cloth 64 to edge the metal cloth 66. Preferably, the bottom of the heat insulation cotton 6 is wrapped around the outside of the rear oxygen sensor 5, and only one layer of the metal cloth 66 is provided at the contact area between the heat insulation cotton 6 and the rear oxygen sensor 5. The contact between the metal cloth 66 and the rear oxygen sensor 5 can effectively dissipate heat and prevent the wire harness 8 from melting inside the heat insulation cotton 6 due to high temperature or abnormal air leakage of the rear oxygen sensor 5.

[0029] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0030] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. A sensor wiring harness heat insulation protection structure, comprising a rear oxygen sensor, a wiring harness, an EGR cooler intake pipe, a cylinder head, and a cylinder block, wherein the cylinder head is mounted on the top of the cylinder block, the EGR cooler intake pipe is installed on the exhaust side of the cylinder block and between the afterspindle and the cylinder block; the rear oxygen sensor is also mounted on the upper side of the afterspindle; the lower end of the wiring harness is connected to the rear oxygen sensor, and its upper part crosses the EGR cooler intake pipe and extends towards the cylinder block side, characterized in that: The wire harness support comprises a U-shaped support and a support rod, the U-shaped support is fixed on the cylinder cover by bolts; the lower end of the support rod is fixed on the upper end of the U-shaped support, and the upper end supports the middle part of the wire harness; the wire harness outside the wire harness body between the lower end and the support rod is wrapped with the heat insulation cotton.

2. A sensor harness thermal protection structure as claimed in claim 1, wherein: The U-shaped support comprises a horizontal plate and two side plates connected to the two ends of the horizontal plate, wherein the horizontal plate is connected to the cylinder cover by bolts, and the lower sides of the two side plates abut against the upper side of the EGR cooler.

3. A sensor harness thermal protection structure as claimed in claim 1, wherein: The support rod is in L-shaped structure.

4. A sensor harness thermal protection structure as described in claim 1, wherein: The wire harness is fixed on the upper part of the support rod by nylon straps.

5. A sensor harness thermal protection structure as claimed in claim 2, wherein: The lower end of the support rod is attached to the horizontal plate and the two side plates.

6. A sensor harness thermal protection structure as described in claim 1, wherein: The heat insulation cotton is fixed by pressing metal button.

7. A sensor harness thermal protection structure as described in claim 1, wherein: The heat insulation cotton has three layers, wherein the inner layer is glass fiber cloth, the middle layer is glass fiber cloth non-woven fabric, and the outer layer is metal cloth.

8. A sensor harness thermal protection structure as claimed in claim 7, wherein: The glass fiber cloth, non-woven fabric and metal cloth are sewn by 304 sewing thread.

9. A sensor harness thermal protection structure as claimed in claim 7, wherein: The glass fiber cloth is turned outwards to attach to the metal cloth to form an edge covering, so as to ensure that the metal cloth edge will not cut the wire.

10. A sensor harness thermal protection structure as claimed in claim 7, wherein: The bottom of the heat insulation cotton is wrapped outside the rear oxygen sensor, and only one layer of the metal cloth is arranged at the part where the heat insulation cotton contacts the rear oxygen sensor.

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