JPH056253U - Cover mounting structure for continuously variable transmission - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a cover mounting structure that suppresses film vibration of the cover to prevent noise generation. [Structure] A case 1 incorporating a continuously variable transmission in which a V-belt 10 is mounted between a driven pulley 2 provided on a drive shaft 4 and a driven pulley 3 provided on a driven shaft 7 has a plurality of outer circumferences. The cover 11 is attached via the attachment bolts 12 of the cover 11, and a reinforcing bolt 13 for suppressing the membrane vibration of the cover 11 is provided at an intermediate portion between the drive shaft 4 and the driven shaft 7 of the cover 11 or in the periphery thereof. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cover mounting structure for a continuously variable transmission.

[0002]

[Prior art and its problems]

 Conventionally, the cover is attached to the case that houses the continuously variable transmission through the mounting bolts, but since the mounting bolts are located on the outer peripheral portion of the cover, it is especially the middle part between the drive shaft and the driven shaft of the cover. Has a problem that when the continuously variable transmission is operated, vibration is generated due to the meshing of the V-belt, etc., and this vibration is transmitted to the cover, causing the cover to vibrate and generate noise. It was

[0003]

[Means for Solving the Problems]

 The present invention was devised in view of the above-mentioned conventional problems, and an object thereof is not to provide a cover mounting structure that suppresses membrane vibration satisfactorily. The gist thereof is a drive pulley provided on a drive shaft and a driven pulley. A cover which is mounted by disposing a plurality of mounting bolts on an outer peripheral portion of a case in which a continuously variable transmission, in which a V belt is mounted between driven pulleys provided on a shaft, is installed. A reinforcing bolt for suppressing the membrane vibration of the cover is provided at or around the intermediate portion between the drive shaft and the driven shaft.

[0004]

[Action]

 Since the cover is attached to the case by the mounting bolts arranged in the periphery of the cover and the low rigidity portion is reinforced by the reinforcing bolts, it is attached to the case. Is reduced.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the cover, and this cover is attached to a case of a continuously variable transmission as shown in the side sectional view of FIG. 3, and in FIG. 2 is equipped with a continuously variable transmission composed of a driven pulley 3 and the drive pulley 2 is composed of a fixed pulley 5 fixed to a drive shaft 4 and a movable pulley 6 slidingly moving with respect to the drive shaft 4. The driven pulley 3 is composed of a fixed pulley 8 fixed to the driven shaft 7 and a movable pulley 9 slidably moving with respect to the driven shaft 7, and the drive pulley 2 and the driven pulley. A V-belt 10 is mounted between the three pulleys 3 and the power from the drive pulley 2 is continuously varied and transmitted to the driven shaft 7 via the driven pulley 3.

A plurality of mounting bolts 12, 12, 12 are arranged on the outer periphery of the cover 11 which is mounted on the case 1 from the outside, and the mounting bolts 12 are screwed into the case 1 to cover the case 1 with the cover 11. A bearing for supporting the drive shaft 4 and the driven shaft 7 is arranged inside the cover 11, and the vibration caused by the rotation of the drive pulley 2 and the driven pulley 3 and the meshing of the V belt 10 is transmitted to the cover 11. This vibration causes the cover 11 to vibrate. Particularly, since there is no mounting bolt in the intermediate portion between the drive shaft 4 and the driven shaft 7, the rigidity is weak, and this portion causes film vibration to generate noise. .. Therefore, as shown in FIG. 1, reinforcing bolts 13 and 13 are provided on the side of the cover 11 at the intermediate portion between the central position 4C of the drive shaft 4 and the central position 7C of the driven shaft 7, and the reinforcing bolts 13 and 13 are provided. , 13 increases the rigidity of this intermediate part and suppresses the occurrence of membrane vibration.

FIG. 2 is a cross-sectional view of the mounting state of the reinforcing bolt 13. The reinforcing bolt 13 has a tip portion screwed into the case 1 to firmly fix the cover 11 to the case 1. The number of the reinforcing bolts 13 may be one, but in order to increase the rigidity, several reinforcing bolts 13 may be arranged in the intermediate portion between the drive shaft center 4C and the driven shaft center 7C and its periphery. preferable.

[0008]

[Effect of the device]

 The present invention has a case in which a continuously variable transmission in which a V-belt is hung between a drive pulley provided on a drive shaft and a driven pulley provided on a driven shaft is incorporated, and a plurality of mounting bolts are provided on an outer peripheral portion. A cover that is installed by disposing, by providing a reinforcing bolt for suppressing the membrane vibration of the cover at or around the intermediate portion of the drive shaft and the driven shaft of the cover, This reinforcement bolt suppresses the membrane vibration of the cover due to the increased rigidity and the vibration transmitted from the continuously variable transmission, and has the effect of providing a cover mounting structure with reduced noise.

[Brief description of drawings]

FIG. 1 is a front view of a cover.

FIG. 2 is an enlarged cross-sectional configuration diagram of a mounting state of a reinforcing bolt.

FIG. 3 is a cross-sectional configuration diagram of a continuously variable transmission installed inside a case and a cover.

[Explanation of symbols]

 1 Case 2 Drive Pulley 3 Driven Pulley 4 Drive Shaft 7 Driven Shaft 10 V Belt 11 Cover 12 Mounting Bolt 13 Reinforcement Bolt

Claims (1)

[Claims for utility model registration] 1. A case in which a continuously variable transmission in which a V-belt is mounted between a drive pulley provided on a drive shaft and a driven pulley provided on a driven shaft is installed, A cover, which is mounted by disposing a plurality of mounting bolts on an outer peripheral portion, at an intermediate portion between the drive shaft and the driven shaft of the cover or a periphery thereof,
A cover mounting structure for an unauthorized transmission, characterized in that a reinforcing bolt for suppressing membrane vibration of the cover is provided.