JP2007187186A - Belt transmission device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt transmission device capable of effectively reducing an abnormal sound generated in operation, while restraining abrasion of a transmission belt. <P>SOLUTION: Paint 52 mixed with feathers 51 is applied to a surface contacting with the transmission belt 41 of respective pulleys 21 to 26. Thus, The feathers 51 of the paint 52 contact with a surface 41a of the transmission belt 41 in an engaging state of the transmission belt 41 and the respective pulleys 21 to 26. Thus, sliding is hardly caused between the transmission belt 41 and the respective pulleys 26. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a belt transmission device including a transmission belt for transmitting power and a pulley around which the transmission belt is wound.

  2. Description of the Related Art Conventionally, a belt transmission device is known in which a transmission belt is wound between a drive pulley attached to an output shaft of an internal combustion engine and an auxiliary pulley attached to an auxiliary machine such as an alternator. Such a belt transmission device drives each auxiliary machine by transmitting the rotational power of the internal combustion engine to the auxiliary machine pulley via the transmission belt.

  By the way, in such a belt transmission device, deterioration of the transmission belt progresses over time due to the engagement between the transmission belt and each pulley. That is, the transmission belt is worn by contact with the pulley, and its surface is smoothed and mirrored. Moreover, the surface hardness of the transmission belt increases due to thermal degradation. For this reason, during the operation of the belt transmission device, a slight slip may occur between the transmission belt and the pulley, resulting in abnormal noise.

Therefore, in order to suppress the smoothing and mirroring of the surface of the transmission belt, there has been proposed a belt transmission device in which a streak forming pulley is provided in the belt transmission device (see Patent Document 1). In this belt transmission device, the surface of the transmission belt is polished by a streak forming pulley so that a minute uneven shape is formed on the surface. As a result, streaks are continuously formed on the drive belt that is being driven, and smoothing and mirroring due to aging of the drive belt are prevented. And the abnormal noise which generate | occur | produces at the time of the action | operation of a belt transmission is reduced.
JP 2005-221058 A

  By the way, the belt transmission device as shown in Patent Document 1 is configured such that a polishing agent is applied to the surface of the streak forming pulley, and a streak is formed on the surface of the transmission belt by this abrasive. . For this reason, since the wear of the transmission belt becomes severe and its wear is promoted, it is necessary to set the durability of the transmission belt higher. Moreover, there is a concern that the increase in wear powder due to the wear of the transmission belt may adversely affect the surrounding mechanism.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a belt transmission device that can suppress wear of the transmission belt and effectively reduce abnormal noise generated during operation. It is in.

  In order to achieve the above object, the invention according to claim 1 is a belt transmission device including a transmission belt for transmitting power and a pulley around which the transmission belt is wound, and the pulley includes the transmission belt and the transmission belt. The gist of this is that the contact surface is coated with a coating containing fuzz.

  According to this configuration, since the pulley is coated with the fuzz mixed paint on the contact surface with the transmission belt, when the transmission belt and the pulley are engaged, the fuzz existing on the surface of the pulley and the surface of the transmission belt Can be configured to contact each other. For this reason, it can suppress that a slip arises between a transmission belt and a pulley, and the abnormal noise generate | occur | produced at the time of the action | operation of a belt transmission apparatus can be reduced suitably. Further, since the fluff and the transmission belt can be brought into contact with each other, the wear of the transmission belt can be suppressed as much as possible.

  The invention according to claim 2 is characterized in that, in the belt transmission device according to claim 1, the paint has a low aggressiveness with respect to the surface of the transmission belt with which the pulley contacts.

Here, “aggressiveness” refers to the degree of wear of the mating member. That is, if the aggressiveness is high, the mating member is likely to be worn, and if the aggressiveness is low, the mating member is difficult to be worn.
According to this configuration, the paint applied to the pulley is less aggressive with respect to the surface of the transmission belt with which the pulley comes into contact, so that wear of the transmission belt can be suppressed. For this reason, while being able to improve the durability of a transmission belt, the increase in abrasion powder can be suppressed.

  Also, even if the paint side is worn due to the contact between the transmission belt and the pulley, the fuzz mixed in the paint appears on the surface of the pulley in order, so that the fuzz and the surface of the transmission belt are kept in contact with each other. Can do. For this reason, the abnormal noise which generate | occur | produces at the time of the action | operation of a belt transmission can be reduced suitably.

  The invention according to claim 3 is the belt transmission device according to claim 1 or 2, wherein the pulley is a pulley that receives the largest load among a plurality of pulleys used in the belt transmission device. It is said.

  When the belt transmission device is configured to have a plurality of pulleys, the tension fluctuation of the transmission belt is greatest at the contact portion between the pulley and the transmission belt that receive the largest load. For this reason, slippage of the transmission belt is most likely to occur in this pulley, and the degree of occurrence of abnormal noise is greatest. In this respect, according to the same configuration, the pulley is a pulley that receives the largest load among the plurality of pulleys used in the belt transmission device, and therefore, noise can be reduced more effectively.

  According to a fourth aspect of the present invention, in the belt transmission device according to any one of the first to third aspects, the rotational power of the output shaft of the internal combustion engine is transmitted to the auxiliary machine via the transmission belt. It is a summary.

  According to this configuration, the belt transmission device transmits the rotational power of the output shaft of the internal combustion engine to the auxiliary machine via the transmission belt. For this reason, when the rotational power of the output shaft of the internal combustion engine is transmitted through the belt transmission device, it is possible to reduce noise generated during operation of the belt transmission device while suppressing wear of the transmission belt.

Hereinafter, with reference to FIGS. 1-4, one Embodiment which actualized the belt transmission device which concerns on this invention is described.
FIG. 1 is a layout diagram of a belt transmission device 1 used in an internal combustion engine. The belt transmission 1 includes a drive pulley 21 fixed to an output shaft 31 of an engine 11 as an internal combustion engine, and auxiliary pulleys 22, 23, 24 fixed to rotary shafts 32, 33, 34, 35 of the auxiliary machines. , 25 and an endless transmission belt 41 wound between the drive pulley 21 and the auxiliary pulleys 22 to 25.

  As an auxiliary machine driven by the belt transmission device 1, an alternator, a water pump, an air conditioner, and a power steering device are provided. An alternator pulley 22, a water pump pulley 23, an air conditioner pulley 24, and a power steering pulley 25 are fixed to the rotary shafts 32, 33, 34, and 35 to which power is input to each auxiliary machine. Has been. An auto tensioner pulley 26 is provided between the alternator pulley 22 and the water pump pulley 23 to elastically press the transmission belt 41 from the back. The auto tensioner pulley 26 applies an appropriate tension to the transmission belt 41 and absorbs the vibration of the transmission belt 41 by pressing the transmission belt 41 in the direction of the arrow X in FIG.

  As shown in FIG. 2, the transmission belt 41 is a V-ribbed belt provided with a plurality of ribs 42 having a V-shaped cross section. The transmission belt 41 includes a belt main body 43 formed of a rubber material and a core wire 44 embedded in the belt main body 43. The belt main body 43 is formed from a synthetic rubber excellent in heat resistance, and a glass fiber cord or the like excellent in tensile strength is used for the core wire 44 in order to suppress the elongation of the transmission belt 41.

  A plurality of grooves 27 that engage with the ribs 42 of the transmission belt 41 are provided in the pulleys 21 to 26 of the drive pulley, auxiliary machine pulley, and auto tensioner pulley. Since the rib 42 and the groove 27 are engaged, the contact area between the transmission belt 41 and the pulleys 21 to 26 can be increased, so that transmission efficiency is improved and transmission power is increased.

  Moreover, the coating material which mixed the fluff is applied to the surface which contacts the transmission belt 41 of each pulley 21-26. FIG. 3 shows a cross-sectional view of each pulley 21-26. Each of the pulleys 21 to 26 is coated with a paint 52 mixed with fuzz 51 such as nylon fiber or aramid fiber on the surface 28 including at least the surface of the groove 27. The fluff 51 is provided so as to protrude from the surface of the paint 52, and the short fibers extend in various directions.

  FIG. 4 shows a cross-sectional view when the pulleys 21 to 26 and the transmission belt 41 are engaged. Each pulley 21 to 26 engages with the transmission belt 41 via the paint 52. For this reason, the fluff 51 of the paint 52 and the surface 41a of the transmission belt 41 come into contact with each other, and it is possible to prevent slippage between the transmission belt 41 and the pulleys 21 to 26. As a result, it is possible to reduce abnormal noise such as stick-slip noise generated by slippage between the transmission belt 41 and the pulleys 21 to 26. Further, since the fluff 51 can be configured to come into contact with the transmission belt 41, wear of the surface 41a of the transmission belt 41 can be suppressed.

  Further, the paint 52 is configured to be less aggressive against the surface 41 a of the transmission belt 41. That is, wear of the transmission belt 41 is suppressed by setting the hardness of the paint 52 lower than the hardness of the surface 41a. For this reason, while improving the durability of the transmission belt 41, generation | occurrence | production of abrasion powder can be suppressed. Further, when the paint 52 side is worn due to the contact between the transmission belt 41 and the pulleys 21 to 26, the fuzz 51 mixed in the paint 52 appears sequentially on the surface of the paint 52. The state where the fluff 51 and the surface 41a are in contact with each other can be maintained. For this reason, slippage between the transmission belt 41 and each of the pulleys 21 to 26 can be suppressed and noise generated when the belt transmission device 1 is operated can be reduced.

  Next, the operation of the belt transmission device 1 will be described. When the engine 11 is started, the drive pulley 21 is rotationally driven by the rotation of the output shaft 31. Then, the transmission belt 41 is rotated in the direction of arrow R in FIG. 1, and the rotational power of the drive pulley 21 is transmitted through the transmission belt 41 to the alternator pulley 22, the water pump pulley 23, the air conditioner pulley 24, and the power steering pulley 25. Is transmitted to. Then, the rotating shafts 32, 33, 34, and 35 of the auxiliary pulleys 22, 23, 24, and 25 are driven to drive the alternator, the water pump, the air conditioner, and the power steering device. Further, the auto tensioner pulley 26 applies appropriate tension to the transmission belt 41 and absorbs vibration of the transmission belt 41.

  Since the transmission belt 41 is engaged with the pulleys 21 to 26 via the paint 52, the fluff 51 of the paint 52 and the surface 41 a of the transmission belt 41 sequentially contact with each other during the operation of the transmission belt 41. As a result, power is transmitted while suppressing slippage between the transmission belt 41 and the pulleys 21 to 26.

According to the belt transmission device of the above embodiment, the following effects can be obtained.
(1) In the above embodiment, since the paint 52 mixed with the fluff 51 is applied to the surface 28 of each of the pulleys 21 to 26, the paint is applied in the engaged state between the transmission belt 41 and each of the pulleys 21 to 26. The fluff 51 of 52 and the surface 41a of the transmission belt 41 can be configured to contact each other. For this reason, during the operation of the belt transmission device 1, it is possible to make it difficult for the transmission belt 41 to slip between the pulleys 21 to 26, and to reduce noise such as stick-slip noise.

  Further, since the fluff 51 of the paint 52 comes into contact with the transmission belt 41 during the operation of the belt transmission device 1, wear of the surface 41 a of the transmission belt 41 can be suppressed. For this reason, it can suppress that a surrounding mechanism is adversely affected by the increase in the abrasion powder resulting from abrasion of a transmission belt.

  (2) In the above embodiment, the paint 52 applied to the surfaces 28 of the pulleys 21 to 26 has a low aggressiveness against the surface 41 a of the transmission belt 41, so that the wear of the transmission belt 41 can be suppressed. For this reason, while improving the durability of the transmission belt 41, generation | occurrence | production of abrasion powder can be suppressed.

  In addition, when the paint 52 side is worn by the operation of the belt transmission device 1, the fuzz 51 mixed in the paint 52 appears sequentially on the surface of the paint 52. Can be maintained in contact with each other. For this reason, the noise which generate | occur | produces at the time of the action | operation of the belt transmission 1 can be reduced.

In addition, you may change the said embodiment as follows.
In the above embodiment, the paint 52 mixed with the fluff 51 is applied to the respective surfaces 28 of the pulleys 21 to 26. However, the paint 52 is applied only to one of the pulleys 21 to 26. It may be. In this case, it is effective to apply the paint 52 to the pulley that receives the largest load among the pulleys 21 to 26. That is, at the contact portion between the pulley receiving the largest load and the transmission belt 41, the tension fluctuation of the transmission belt 41 is the largest, so that the transmission belt 41 is liable to slip and the degree of occurrence of abnormal noise is greatest. . For this reason, by applying the paint 52 to the pulley that receives the largest load, it is possible to effectively reduce noise while suppressing the application work and cost of the paint 52 as much as possible. Further, the paint 52 may be applied only to any one of the pulleys 21 to 26.

  In the above embodiment, the transmission belt 41 is a V-ribbed belt, but may be another type of belt. Even when a V-belt or a toothed belt is adopted as the transmission belt 41, the operation of the belt transmission device 1 is performed while the wear of the transmission belt 41 is suppressed by applying the paint 52 mixed with the fluff 51 on the surface of the pulley. The abnormal noise generated sometimes can be effectively reduced.

  In the above embodiment, the paint 52 is configured so as to be less aggressive against the surface 41a of the transmission belt 41. However, the paint 52 may be made of a material that is less aggressive only at high temperatures. It is known that the abnormal noise caused by the slip between the transmission belt 41 and each of the pulleys 21 to 26 becomes relatively large during the warm operation of the engine 11 and becomes relatively small during the cold operation. For this reason, if the paint 52 is made to be less aggressive only at a high temperature, the noise caused by slipping is reduced during the warm operation, and the transmission belt 41 and the pulleys 21 to 26 during the cold operation. The transmission efficiency of the power can be improved by strengthening the biting. As a material that becomes less aggressive only at a high temperature, a thermoplastic material that softens at a high temperature can be employed.

  In the above embodiment, the present invention is applied to the belt transmission device 1 that transmits the rotational power of the output shaft 31 of the engine 11 to each auxiliary machine such as an alternator via the transmission belt 41. The present invention can also be applied to the belt transmission device used in this mechanism using the same principle. The present invention can also be applied to a belt transmission device used in industrial equipment other than the engine 11. Also in such a belt transmission device, it is possible to reduce abnormal noise generated during operation of the belt transmission device while suppressing wear of the transmission belt.

FIG. 3 is a layout diagram of a belt transmission device according to the present embodiment. The perspective view which shows the engagement state of a transmission belt and a pulley. Sectional drawing of a pulley. Sectional drawing which shows the engagement state of a transmission belt and a pulley.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Belt transmission device, 11 ... Engine, 21 ... Drive pulley, 22, 23, 24, 25 ... Auxiliary machine pulley, 26 ... Auto tensioner pulley, 31 ... Output shaft, 41 ... Transmission belt, 51 ... Fluff, 52 ... Paint .

Claims (4)

A belt transmission device comprising a transmission belt for transmitting power and a pulley around which the transmission belt is wound,
The pulley is formed by applying paint mixed with fuzz on a contact surface with the transmission belt. The belt transmission device according to claim 1,
The belt transmission device according to claim 1, wherein the paint is less aggressive against the surface of the transmission belt with which the pulley contacts. The belt transmission device according to claim 1 or 2,
The pulley is a pulley that receives the largest load among a plurality of pulleys used in the belt transmission.   The belt transmission device according to any one of claims 1 to 3, wherein the rotational power of the output shaft of the internal combustion engine is transmitted to the auxiliary machine via the transmission belt.

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