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CN-224228752-U - Mixed engine front end accessory driving system based on fan power switching

CN224228752UCN 224228752 UCN224228752 UCN 224228752UCN-224228752-U

Abstract

The utility model relates to the technical field of engine front-end accessories, and particularly discloses a hybrid engine front-end accessory driving system based on fan power switching. The system comprises two layers of gear trains, wherein the first layer of gear train consists of a crank pulley and a crank layer fan pulley and is connected with an engine through a belt, and the second layer of gear train consists of a generator pulley and a generator layer fan pulley and is connected with a generator through a belt. The generator layer fan belt pulley and the crank shaft layer fan belt pulley are integrated on the same fan shaft part and are jointly installed on a shaft connecting bearing of the fan shaft part, and the crank shaft layer fan belt pulley is connected with the shaft connecting bearing through a one-way bearing, so that the fan can be automatically switched between different driving sources. The utility model can drive the fan through the engine or the generator according to different working conditions, reduce energy consumption, improve the running efficiency of the cooling system and is suitable for the thermal management requirement of the multi-scene hybrid vehicle.

Inventors

  • DING QUANYU
  • TIAN HONGYU
  • ZHANG TENG
  • XU DAWEI

Assignees

  • 成都嘉陵华西光学精密机械有限公司

Dates

Publication Date
20260512
Application Date
20250516

Claims (7)

  1. 1. A front end accessory driving system of a hybrid engine based on fan power switching is characterized by comprising two layers of gear trains, wherein the first layer of gear train comprises a crank pulley (8) and a crank layer fan pulley (2), the crank pulley and the crank layer fan pulley are connected through a belt transmission and used for receiving engine output power, the second layer of gear train comprises a generator pulley (7) and a generator layer fan pulley (1), the generator pulley (7) and the generator layer fan pulley (1) are connected through a belt transmission and used for receiving generator output power, the generator layer fan pulley (1) and the crank layer fan pulley (2) are integrated on the same fan shaft part and are jointly mounted on a shaft connecting bearing (5) of the fan shaft part, the generator layer fan pulley (1) is in interference fit with the shaft connecting bearing (5), the crank layer fan pulley (2) is connected with the shaft connecting bearing (5) through a one-way bearing (3), the fan is mounted on the generator layer fan pulley (1), and the shaft connecting bearing (5) is mounted in a bearing seat (4).
  2. 2. A hybrid engine front end accessory drive system based on fan power switching according to claim 1, characterized in that when the engine drives the crank pulley (8) to rotate, the crank layer fan pulley (2) drives the shaft connecting bearing (5) to rotate through the one-way bearing (3), thereby driving the generator layer fan pulley (1) and the fan to rotate.
  3. 3. A hybrid engine front end accessory drive system based on fan power switching according to claim 1, characterized in that when the generator drives the generator pulley (7) to rotate, the shaft coupling bearing (5) and the fan are directly driven to rotate by the generator layer fan pulley (1), and the crank layer fan pulley (2) does not rotate with the shaft coupling bearing (5) due to the unidirectional bearing (3).
  4. 4. A hybrid engine front end accessory drive system based on fan power switching as claimed in claim 1, wherein a dust cover (6) is also mounted on the bearing housing (4).
  5. 5. A hybrid engine front end accessory drive system based on fan power switching according to claim 1, characterized in that the unidirectional bearing (3) comprises a unidirectional bearing inner ring (31) and a unidirectional bearing outer ring (32), the unidirectional bearing inner ring (31) is in interference fit with the shaft coupling bearing (5), and the unidirectional bearing outer ring (32) is in interference fit with the inner hole of the crank layer fan pulley (2).
  6. 6. The front-end accessory driving system of the hybrid engine based on fan power switching according to claim 1, wherein two sections of installation positions, namely a first shaft end (51) and a second shaft end (52) of the shaft bearing, are arranged on the shaft bearing (5), the second shaft end (52) of the shaft bearing is positioned at the tail end of the shaft bearing (5), and the first shaft end (51) of the shaft bearing is positioned at one side of the second shaft end (52) of the shaft bearing.
  7. 7. The front end accessory drive system of a hybrid engine based on fan power shifting of claim 6, wherein the second shaft-to-bearing shaft end (52) has a smaller diameter than the first shaft-to-bearing shaft end (51).

Description

Mixed engine front end accessory driving system based on fan power switching Technical Field The utility model relates to the technical field of engine front-end accessory drive systems, in particular to a hybrid engine front-end accessory drive system based on fan power switching. Background The front-end accessory system of the fuel engine of the traditional commercial vehicle transmits the power output by the crankshaft end of the engine to each accessory through a belt, so that each accessory is ensured to work normally. Typically, engine front end accessory drive systems include accessories such as crank wheels, air conditioning compressors, fans, generators, water pumps, and the like. Under the use scenes of long distance, high speed, high load and the like, all accessories in the front-end accessory driving system of the engine need to work normally, and under the special scenes of short-distance rural national roads and the like, the whole front-end accessory driving system of the engine only needs to operate by a fan, and other accessories do not work. The fan is used as an important component of the front-end accessory driving system of the engine, the power occupation ratio of the fan is relatively large, and because of the use characteristics of multiple scenes of the commercial vehicle, the power consumption of the front-end accessory driving system of the whole engine is reduced as much as possible to meet the precondition that only the fan works in special scenes, thereby achieving the effects of energy conservation and emission reduction, and the power switching of the fan is needed to be realized in different use scenes. The front end accessory driving system of the engine of the traditional commercial vehicle can not realize the power switching of the fan under the use of multiple scenes, so the front end accessory driving system of the hybrid engine and the corresponding fan shaft component are proposed based on the power switching of the fan. The control system of the vehicle can control the front end accessory driving system of the engine according to the parameters of budgets under different use scenes so as to realize the power switching of fans under multiple scenes and finally realize the effects of energy conservation and emission reduction. It is therefore of great importance to develop a hybrid engine front end accessory drive system based on fan power switching and corresponding fan shaft components. Disclosure of utility model The utility model aims to provide a front-end accessory driving system of a hybrid engine based on fan power switching, which is used for driving two layers of gear trains to operate so as to realize the operation of a fan when the engine is driven, and only driving a motor layer gear train to operate so as to realize the operation of the fan when a generator is driven. The scheme improves the flexibility of fan driving and adapts to the driving requirements of different power sources. The utility model is realized by adopting the following technical scheme: A front end accessory driving system of a hybrid engine based on fan power switching is characterized by comprising two layers of gear trains, wherein the first layer of gear train comprises a crank pulley and a crank layer fan pulley which are connected through belt transmission and used for receiving engine output power, the second layer of gear train comprises a generator pulley and a generator layer fan pulley which are connected through belt transmission and used for receiving generator output power, the generator layer fan pulley and the crank layer fan pulley are integrated on the same fan shaft part and are jointly mounted on a shaft connecting bearing of the fan shaft part, the generator layer fan pulley is in interference fit with the shaft connecting bearing, the crank layer fan pulley is connected with the shaft connecting bearing through a one-way bearing, the fan is mounted on the generator layer fan pulley, and the shaft connecting bearing is mounted in a bearing seat. Further, when the engine drives the crank pulley to rotate, the crank layer fan pulley drives the shaft to rotate through the one-way bearing and the bearing, so that the generator layer fan pulley and the fan are driven to rotate. Further, when the generator drives the generator belt pulley to rotate, the generator layer fan belt pulley directly drives the shaft connecting bearing and the fan to rotate, and at the moment, the crankshaft layer fan belt pulley does not rotate along with the shaft connecting bearing due to the action of the one-way bearing. Further, a dust cover is also arranged on the bearing seat. The dust cover can effectively prevent dust and particles from entering the bearing system, and the service life and reliability of the bearing are improved. Further, the one-way bearing comprises a one-way bearing inner ring and a one-way bearing outer ring, the one-way bearing inner ring is in interference fit