JPH04123823U - Auxiliary drive device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of this study was to improve the layout of the auxiliary equipment in an auxiliary equipment drive system that drives the auxiliary equipment in conjunction with a balance shaft, thereby improving the sound and vibration performance. do. [Configuration] Air conditioner compressor and alternator 13
is arranged near the part corresponding to the center of gravity of the power train 12 on the side of the engine 1, and a belt is installed between the pulleys 2 and 4 on the air conditioner compressor and alternator 13 side and the pulley 14 on the balance shaft 10A and 10B side. 15
The alternator 13 and the air conditioner compressor are driven to rotate in synchronization with the balance shafts 10A and 10B. The air conditioner compressor and alternator 13 are not located far away from the front side of the engine 1 from the part corresponding to the center of gravity of the power train 12 on the side of the engine 1, and are not located far away from the front side of the engine 1 in the longitudinal direction of the power train 12 from the front side of the engine 1. The overhang weight can be reduced, which is favorable in terms of sound and vibration performance.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention connects the auxiliary equipment to a balance shaft driven by the driving force of the engine. Regarding the auxiliary equipment drive device that is driven by moving the auxiliary equipment, it is particularly important to Regarding good technology.

0002

[Conventional technology]

Conventionally, the crankshaft and auxiliary equipment of a vehicle's engine were connected by pulleys, belts, etc. The auxiliary equipment is driven in synchronization with the crankshaft through a power transmission device. There is known an auxiliary machine drive device that has the following structure. That is, in FIG. 7, the vehicle interior air conditioner (air conditioner The air conditioner compressor compresses the refrigerant in the engine system) and generates the steering hydraulic pressure. Supplements such as power steering pumps, alternators that generate power for various electrical devices in vehicles, etc. It is equipped with a machine. These auxiliary machines are connected to pulleys 2 to 4 and engine 1, respectively. Each belt 7 is hung between the auxiliary drive pulley 6 connected to the crankshaft 5. The pulleys are rotated and driven to rotate in synchronization with the engine 1 at a ratio according to the diameter of each pulley. this As a result, each auxiliary machine performs work as necessary according to its own function, and the necessary driving force is provided by the engine. Replaced by the load of gin 1.

0003 Each of the auxiliary machines is arranged on the front side of the engine 1, and is mounted on a bracket or the like. It is attached to the outside of the engine 1 via a mounting member. On the other hand, a balance shaft driving pulley 8 is connected to the crankshaft 5. The rotation of the pulley 8 was connected to a balance shaft 10 via a belt 9. A gear device (not shown) interlocking with the pulley 10a or the balance shaft 10 The balance shaft 10 is connected to the pulleys 10a connected to the Rotationally driven at twice the rotational speed of the crankshaft 5 and in synchronization with the crankshaft 5 be done.

0004 Incidentally, a timing pulley 11 for driving a cam is also connected to the crankshaft 5. It will be done.

[0005]

[Problem that the idea aims to solve]

However, in such conventional auxiliary drive devices, the layout of each auxiliary There were the following problems due to the relationship between That is, each auxiliary machine is attached to the engine 1 where the pulley 6 connected to the crankshaft 5 is located. The configuration is such that they are all placed on the front side of the. Therefore, each auxiliary machine is placed on the side of engine 1. It is far away from the part corresponding to the center of gravity of the power train 12 in the front side. The longitudinal direction of the power train 12 from the front side of the engine 1 is The weight of the bar hang increases, which is unfavorable in terms of sound vibration performance, and is particularly a cause of muffled sound. Become.

[0006] By the way, in recent years, balance systems have been developed as mentioned above for the purpose of improving the sound and vibration performance of vehicles. There is a tendency for engines equipped with shafts 10 to increase. Conventionally, the balance shaft 10 and an auxiliary machine are linked via a power transmission device. , there is one in which the auxiliary machine is driven in synchronization with the balance shaft 10 ( (Refer to Utility Model Application Publication No. 56-25852).

[0007] However, even in this case, all auxiliary machines are placed on the front side of engine 1. Since the configuration is similar to that of the prior art example described above, there are problems. Therefore, in view of the above-mentioned conventional problems, the present invention has been developed to replace the auxiliary equipment with the driving force of the engine. Auxiliary equipment drive that is linked to the balance shaft driven by By making unique improvements to the layout of auxiliary equipment, we have solved the above conventional problems. The purpose is to solve the problem.

[0008]

[Means to solve the problem]

For this reason, the auxiliary drive device of the present invention is equipped with a battery that is driven by the driving force of the engine. A lance shaft and an auxiliary machine are linked via a power transmission device, and the auxiliary machine is connected to a balance shaft. In an auxiliary equipment drive device that is designed to drive in synchronization with the motor, the auxiliary equipment is driven by an engine. It is located near the area corresponding to the center of gravity of the powertrain on the side of the engine.

[0009]

[Effect]

In such a configuration, the auxiliary equipment is aligned with the powertrain center of gravity on the side of the engine. Because it is not located far away from the front part of the engine, The overhang weight in the longitudinal direction of the powertrain from the side of the engine is reduced. Therefore This is favorable in terms of sound vibration performance, and in particular, the generation of muffled sounds is effectively prevented.

0010 In other words, in conventional normal engines, the powertrain has a high noise level value. The bending eigenvalue is located in the engine's normal rotation range. Also, with conventional balance shaft engine, the overall noise level can be reduced, but the power tray The bending eigenvalue of the engine remains within the engine's normal rotation range. However, in the engine with the balance shaft of this invention, the noise level can be reduced completely. At the same time, the bending eigenvalues of the powertrain can be physically reduced. The engine is moved to a higher rotation range than the normal rotation range, and the areas with high noise levels in the normal rotation range are This makes it possible to eliminate the noise, thereby improving sound and vibration performance.

[0011]

【Example】

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Figure 1 is a schematic diagram of one embodiment of the present invention, showing an air conditioner compressor, a power steering The configuration including auxiliary equipment such as a pump and alternator 13 is the same as the conventional one. or, The rotation of the balance shaft driving pulley 8 connected to the crankshaft 5 is controlled by a bell. The pulley 22 connected to the balance shaft 10B via the shaft 23, or the The signals are transmitted to the pulleys 25 connected to a gear device that interlocks with the bearing shaft 10A. The balance shafts 10A and 10B have a rotational speed twice that of the crankshaft 5. Moreover, the configuration in which it is rotationally driven in synchronization with the crankshaft 5 is also the same as the conventional one. .

0012 Here, among the auxiliary equipment, the power steering pump is placed on the front side of engine 1. and the pulley 3 connected to the power steering pump and the crankshaft of the engine 1. A belt 7 is passed between the auxiliary drive pulley 6 connected to the power steering wheel The pump is rotationally driven in synchronization with the engine 1. On the other hand, among the auxiliary equipment, the air conditioner compressor and alternator 13 are connected to the engine 1. It is arranged near the part corresponding to the center of gravity of the power train 12 on the side of the engine. Pulleys 2 and 4 connected to the air conditioner compressor and alternator 13, respectively, and the valve A belt is inserted between the auxiliary drive pulley 14 connected to the bearing shafts 10A and 10B. 15 is hung around, and the alternator 13 and air conditioner compressor are connected to the balance shaft. It is rotationally driven in synchronization with the feet 10A and 10B.

[0013] The above configuration will be described in further detail with reference to FIGS. 2 to 5 in addition to FIG. 1. That is, a balance shaft is installed at the lower end of the crankshaft 5 on the front side of the engine 1. A shaft driving pulley 8 and a timing pulley 11 are connected. timing poo 11 and the cover on the upper intake side and exhaust side of the front side of engine 1. The cam pulleys 17 connected to each end of the timing belt 18 are connected to the ends of the timing belt 18. is being passed around. Also, this timing belt 18 is connected to a water pump drive plate. It is also used around 19. In addition, 20 and 21 are for the timing belt 18, respectively. tensioner and idler pulley.

[0014] The balance shaft driving pulley 8 and the balance shaft 1 on the exhaust side A belt 23 is passed around the pulley 22 connected to 0B. Also, this bell The shaft 23 is installed on a shaft 24 that is rotatably supported on the front side of the engine. It is also wrapped around the pulled pulley 25. This shaft 24 also has a reversing gear. 26 is fixed, and the reversing gear 26 is connected to the balance shaft 10 on the intake side. It meshes with a gear 29 fixed to the front end of A by a mounting bolt 28.

[0015] Note that 30 is a tensioner for the balance shaft driving belt 23. The balance shaft 10A on the intake side has multiple bearings inside the engine 1. It is supported and extends, and a balance weight 31 is provided at a predetermined position on its outer periphery. It is. Is the rear end of the balance shaft 31 the rear end wall of the engine 1? The alternator drive pulley 14 is attached to the rear end of the protruding part. It is fixedly attached with bolts 32.

[0016] Also, although the balance shaft 10B on the exhaust side is not shown, it is located inside the engine 1. is supported by a plurality of bearings, and projects outward from the rear end wall of the engine 1. A pulley is fixedly attached to the rear end portion that comes out. The alternator 13 is installed on the side of the power train 12 on the intake side of the engine 1. The bracket 33 and the bolt 34 are arranged near the part corresponding to the center of gravity of the and fixedly mounted. A pulley 4 is connected to the drive shaft 13a of the alternator 13. tied. This pulley 4 and the alternator drive pulley of the balance shaft 10A. A belt 15 is passed around the belt 14.

[0017] Although not shown, the air conditioner compressor is installed on the exhaust side of engine 1. The bracket is located near the part corresponding to the center of gravity of the power train 12 on the side of the The pulley 2 is connected to the drive shaft of the A belt 15 is passed around the pulley 2 and the pulley of the balance shaft 10B. In this configuration, the rotation of the crankshaft 5 drives the balance shaft. The dynamic pulley 6 rotates. The rotation of this pulley 6 is carried out via the belt 23. is transmitted to the pulley 22 connected to the balance shaft 10B on the The balance shaft 10B on the strike side rotates. Exhaust side balance shaft The rotation of the engine 10B is transmitted to the air conditioner compressor via the belt 15, pulley 2, etc. is reached and the compressor is driven.

[0018] In addition, the balance shaft driving pulley 6 is rotated by a pulley 25 via a belt 23. , the reversing gear 26 rotates, and the gear 29 rotates. The rotation of this gear 29 The balance shaft 10A on the intake side rotates, and this rotation is caused by the pulley 1. 4, transmitted to the alternator 13 via the belt 15 and pulley 4, The motor 13 is driven.

[0019] According to the above configuration, the air conditioner compressor and alternator 13 are Placed near the part corresponding to the center of gravity of the power train 12 on the side of the engine 1 By doing so, you have the following advantages: That is, the air conditioner compressor and alternator 13 supply power to the side of the engine 1. -Train 12 Located far away from the area corresponding to the center of gravity on the front side. The longitudinal direction of the power train 12 from the front side of the engine 1 It is possible to reduce the overhang weight of the The occurrence of grinding noise can be effectively prevented.

[0020] That is, FIG. 6 is a characteristic diagram showing the relationship between engine speed and cabin noise level. , the bending stiffness of the powertrain, which is a high noise level value, in conventional regular engines. The positive value is located in the engine's normal rotation range. In addition, the engine with a conventional balance shaft With gin, the overall noise level can be reduced, but the powertrain tune The eigenvalue remains within the engine's normal rotation range.

[0021] However, in the engine 1 with the balance shaft of the above embodiment, the noise level The bending characteristic value of the power train 12 can be lowered overall. moves to a higher rotation range than the normal rotation range of engine 1, and the noise level decreases in the normal rotation range. (The shaded area in the diagram indicates the amount of noise level reduction.) ). As a result, in particular, the sound vibration performance that can suppress the generation of muffled sound is improved. You can improve your performance.

[0022] Although the present invention has been explained above with reference to specific embodiments, the present invention is not limited to this. The present invention is not limited to this invention by experts in the relevant technical field. Various changes and modifications may be made without departing from the scope of the attached utility model registration claims. It should be noted that this is possible. For example, in this embodiment, the air conditioner compressor and alternator 13 near the part corresponding to the center of gravity of the power train 12 on the side of the engine 1, respectively. However, in place of these auxiliary machines, other auxiliary machines should be placed in the same position. The arrangement position is not particularly limited to the position shown in the embodiment.

[0023]

[Effect of the idea]

As explained above, this invention uses auxiliary equipment that is driven in synchronization with the balance shaft. It should be placed near the part on the side of the engine that corresponds to the center of gravity of the powertrain. Therefore, it has a great practical effect of improving sound vibration performance.

[Brief explanation of drawings]

[Fig. 1] A schematic diagram of an engine showing an embodiment of an auxiliary drive device according to the present invention.

[Figure 2] Detailed plan sectional view of the engine of the above embodiment

[Figure 3] Front view from arrow A in Figure 2

[Figure 4] Side view viewed from arrow B in Figure 2

[Figure 5] Rear view viewed from arrow C in Figure 2

[Figure 6] Characteristic diagram showing the relationship between engine speed and cabin noise level

[Fig. 7] Schematic diagram of an engine showing an example of a conventional auxiliary drive device

[Explanation of symbols]

1 engine 2 pulley 4 Pulley 5 Crankshaft 8 Balance shaft drive pulley 10A balance shaft 10B balance shaft 12 Powertrain 13 Alternator 14 Pulley 15 Belt 22 Pulley 23 Belt

Claims (1)

[Scope of utility model registration request] Claim 1: A balance shaft driven by the driving force of an engine and an auxiliary machine are linked via a power transmission device,
An auxiliary equipment drive device configured to drive the auxiliary equipment in synchronization with a balance shaft, characterized in that the auxiliary equipment is arranged near a part corresponding to the center of gravity of the power train on the side of the engine. Device.