Thermal insulation structure of timely four-wheel drive type power takeoff with front transverse engine

Abstract

The utility model discloses a thermal insulation structure of a timely four-wheel drive type power takeoff with a transversely arranged engine, which is arranged between the front section of an exhaust system of the engine and the power takeoff, the thermal insulation structure is a thermal insulation plate, a mounting hole is arranged on the thermal insulation plate, and the thermal insulation plate is fixed on one side of the power takeoff through a bolt structure. The engine front transverse timely four-wheel drive type power takeoff heat insulation structure is reasonable in design, the heat insulation plate is designed according to the shape of the outline of the power takeoff, the protection area of the heat insulation plate is increased, and the space influence on peripheral parts is reduced; the mounting point sinking and edge Z-shaped folding characteristics can effectively improve the rigidity of the heat insulation plate, and avoid the deformation of the heat insulation plate and the interference abnormal sound of peripheral parts; and the influence of the exhaust temperature on the power takeoff is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile engines, in particular to a heat insulation structure for a power take-off of a front transverse engine front-wheel drive all-wheel drive vehicle. Background Art

[0002] The power take-off is an important component in a front transverse engine front-wheel drive all-wheel drive vehicle, which changes the direction of the transmission output power by 90° and transmits it to the rear axle through the central drive shaft to achieve the function of increasing speed and reducing torque. The normal operating temperature of the power take-off needs to be less than 120 °C, and the operating time at the maximum operating temperature of 150 °C does not exceed 0.5 hours.

[0003] Due to layout reasons, the exhaust system of the transverse engine needs to pass through the middle of the vehicle. In particular, the exhaust system of the engine with a rear-mounted exhaust system inevitably has a relatively short distance from the power take-off. The maximum temperature of the front section of the exhaust system can reach about 800 °C, and the radiant temperature to the power take-off may exceed 120 °C, and may exceed 150 °C under some working conditions.

[0004] Under the current layout design, the minimum distance between the power take-off and the front section of the high-temperature source engine exhaust system is about 50 mm, and there is no possibility of optimizing the layout. The high-temperature gas generated by the engine work causes the temperature of the front section of the exhaust system to rise sharply, and at the same time, the high temperature radiates to the relatively close power take-off, resulting in the over-standard operating temperature of the power take-off, affecting the oil lubrication performance in the power take-off, and further leading to a significant decline in the service life and performance of important components such as the gear train and bearings in the power take-off.

[0005] For example, a full-power power take-off of an engine disclosed in Patent CN205001066U includes a housing and a power input gear, an intermediate shaft and a power take-off output shaft arranged in parallel in the housing. An intermediate gear is provided on the intermediate shaft, and a power take-off gear is provided on the power take-off output shaft. The power input gear meshes with the intermediate gear, and the intermediate gear meshes with the power take-off gear. The power input gear has an output end and an input end. A small flywheel fixed by a positioning pin and a bolt is provided on the output end of the power input gear. The input end of the power input gear is connected to the engine flywheel through a torsional damper. A transition plate is provided on the housing, and the transition plate is locked to the engine flywheel housing by bolts. If the exhaust system of the transverse engine needs to pass through the middle of the vehicle, the power take-off will be affected by the temperature of the exhaust pipe. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a heat insulation structure for a power take-off of a front transverse engine front-wheel drive all-wheel drive vehicle to effectively reduce the influence of the exhaust temperature on the power take-off.

[0007] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0008] The heat insulation structure of the power take-off for the front-transverse and on-demand four-wheel drive vehicle of the engine. The heat insulation structure is arranged between the front section of the engine exhaust system and the power take-off. The heat insulation structure is a heat insulation plate, and the heat insulation plate is provided with mounting holes, and the heat insulation plate is fixed on one side of the power take-off through a bolt structure.

[0009] Furthermore:

[0010] The edge of the heat insulation plate is provided with an arc-shaped folding edge, and the arc-shaped folding edge faces the power take-off side.

[0011] The thickness of the heat insulation plate is 0.7 - 1.5 mm.

[0012] The heat insulation plate is a plate-like structure with a convex design.

[0013] One side of the heat insulation plate is provided with a profiling arc-shaped groove adapted to the outer shape of the power take-off.

[0014] The heat insulation plate is provided with a sunken fixing step, and a set of mounting positioning holes are arranged on the sunken fixing step.

[0015] The heat insulation plate is in contact with the power take-off only at the sunken fixing step.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The heat insulation structure of the power take-off for the front-transverse and on-demand four-wheel drive vehicle of the engine is reasonably designed. The heat insulation plate is designed according to the contour of the power take-off, which improves the protection area of the heat insulation plate and reduces the spatial influence on surrounding parts; the sunken installation points and the Z-shaped folding edge at the edge can effectively improve the stiffness of the heat insulation plate, avoid deformation of the heat insulation plate and interference and abnormal noise with surrounding parts; effectively reduce the influence of the exhaust temperature on the power take-off. Description of the Drawings

[0018] The following briefly describes the content expressed by each drawing in this specification and the marks in the drawings:

[0019] Figure 1 It is a schematic diagram of the heat insulation plate on the power take-off of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the heat insulation plate of the present invention.

[0021] In the figure:

[0022] 1. Mounting positioning hole Ⅰ, 2. Mounting positioning hole Ⅱ, 3. Fixing hole, 4. Flanging, 5. Arc-shaped groove, 6. Avoidance hole. Detailed Description of the Preferred Embodiments

[0023] The following further details the specific embodiments of the present invention by describing the embodiments with reference to the drawings.

[0024] As Figure 1 and Figure 2 shown, for the power take-off heat insulation structure of the front-transverse engine timely four-wheel drive vehicle model, the heat insulation structure is arranged between the front section of the engine exhaust system and the power take-off a, effectively reducing the influence of the exhaust temperature on the power take-off and ensuring the stability of the power take-off operation.

[0025] Preferably, the heat insulation structure is a heat insulation plate b, and the heat insulation plate is provided with mounting holes, and the heat insulation plate is fixed on one side of the power take-off through a bolt structure. To overcome the problem of the too high working temperature of the power take-off in the background technology, a heat insulation plate installed on the power take-off is designed between the power take-off and the front section of the exhaust system.

[0026] The edge of the heat insulation plate is provided with an arc-shaped flanging, that is, the arc-shaped flanging is the flanging 4, and the arc-shaped flanging faces the power take-off side; the heat insulation plate is designed with double flanging along the contour of the power take-off, effectively strengthening the stiffness of the heat insulation plate and at the same time better playing a role in guiding the exhaust high-temperature radiation.

[0027] The thickness of the heat insulation plate is 0.7 - 1.5 mm, and the preferred thickness is 0.8 mm. The heat insulation plate is a plate-like structure with a convex design. An imitation arc groove 5 adapted to the shape of the power take-off is provided on one side of the heat insulation plate, and an avoidance hole 6 is provided corresponding to the oil injection hole, which is convenient for the replacement and maintenance of the power take-off oil.

[0028] The heat insulation plate is provided with a sunken fixing step, and a group of mounting positioning holes are provided on the sunken fixing step. The group of mounting positioning holes are respectively the mounting positioning hole Ⅰ1 and the mounting positioning hole Ⅱ2, and the two mounting positioning holes are arranged on one side, and a fixing hole 3 is arranged on the other side, and the fixing is reliable.

[0029] The heat insulation plate is only in contact with the power take-off in a sunken fixing step, and the heat insulation plate adopts a sunken design, increasing the stiffness of the heat insulation plate and at the same time increasing the gap between the heat insulation plate and the power take-off, making the heat insulation effect better.

[0030] The heat insulation structure of the present utility model is reasonably designed. The heat insulation plate is designed according to the contour of the power take-off, improving the protection area of the heat insulation plate and reducing the spatial influence on the surrounding parts; the sunken installation points and the edge Z-shaped flanging features can effectively improve the stiffness of the heat insulation plate, avoiding the deformation of the heat insulation plate and the interference and abnormal noise with the surrounding parts; effectively reducing the influence of the exhaust temperature on the power take-off.

[0031] The above is only a description of the preferred embodiments of the present utility model, and the above technical features can be arbitrarily combined to form multiple embodiment schemes of the present utility model.

[0032] The present utility model has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the concept and technical solution of the present utility model, or the concept and technical solution of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A heat insulation structure for a power take-off of a front transverse engine all-time four-wheel drive vehicle, characterized in that: The heat insulation structure is arranged between the front section of the engine exhaust system and the power take-off. The heat insulation structure is a heat insulation plate, and the heat insulation plate is provided with mounting holes, and the heat insulation plate is fixed on one side of the power take-off through a bolt structure.

2. The heat insulation structure of the power take-off for the front transverse engine real-time four-wheel drive vehicle according to claim 1, wherein: An arc-shaped folded edge is provided at the edge of the heat insulation plate, and the arc-shaped folded edge faces the power take-off side.

3. The heat insulation structure of the power take-off for the front transverse engine real-time four-wheel drive vehicle according to claim 1, characterized in that: The thickness of the heat insulation plate is 0.7 - 1.5 mm.

4. The heat insulation structure of the power take-off for the front transverse engine real-time four-wheel drive vehicle according to claim 1, characterized in that: The heat insulation plate is a plate-shaped structure with a convex design.

5. The heat insulation structure of the power take-off for the front-transverse engine real-time four-wheel drive vehicle according to claim 1, characterized in that: An imitation arc-shaped groove adapted to the outer shape of the power take-off is provided on one side of the heat insulation plate.

6. The heat insulation structure of the power take-off for the front transverse engine real-time four-wheel drive vehicle according to claim 4, wherein: A sinking fixing step is provided on the heat insulation plate, and a group of mounting positioning holes are provided on the sinking fixing step.

7. The heat insulation structure of the power take-off for the front transverse engine real-time four-wheel drive vehicle according to claim 6, characterized in that: Only the sinking fixing step of the heat insulation plate is in contact with the power take-off in a fitting manner.

Images