JPH056254U - Cover mounting structure for continuously variable transmission - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to increase the rigidity of the cover to prevent deformation and vibration of the cover. [Structure] A cover 11 attached to a case incorporating a continuously variable transmission is provided with a pair of knock pins 13 and 13 at right angles in the vicinity of the center of a straight line connecting a drive shaft and a driven shaft of the continuously variable transmission. The knock pins 13, 13
As a result, the lateral deformation of the cover 11 can be suppressed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

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

[0002]

[Prior art and its problems]

 Conventionally, a continuously variable transmission is internally housed in a case, a cover is attached to the case via a mounting bolt, and a bearing for supporting the continuously variable transmission is provided inside the cover. , The load from the continuously variable transmission is transferred to the cover, the low rigidity part of the center part of the cover is deformed, or the mating surface of the mounting holes of the mounting bolts slips and the center of the cover bearing shifts. As a result, the vibration of the cover becomes large and the internal parts are adversely affected.

[0003]

[Means for Solving the Problems]

 The present invention has been made in view of the above conventional problems, and an object thereof is not to provide a cover mounting structure that can suppress vibrations and the like without deformation of the cover. A cover that can be mounted by arranging multiple mounting bolts on the outer peripheral part of a case that internally houses a continuously variable transmission in which a V belt is hung between the drive pulley provided and the driven pulley provided on the driven shaft. That is, a pair of knock pins that suppress the deformation of the cover are provided in the vicinity of substantially the center of the straight line connecting the drive shaft and the driven shaft of the cover.

[0004]

[Action]

 A pair of knock pins were installed at a right angle in the vicinity of the center of the straight line connecting the drive shaft and the driven shaft, and the cover was attached to the case with these knock pins. ， The deformation can be suppressed.

[0005]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a cover of a continuously variable transmission, and FIG. 2 is a side sectional configuration view of the continuously variable transmission installed inside the cover. In FIG. 2, a continuously variable transmission is housed inside a case 1. This continuously variable transmission is composed of a drive pulley 2 and a driven pulley 3, and the drive pulley 2 is a fixed pulley 5 fixed to a drive shaft 4. And a movable pulley 6 that slides with respect to the drive shaft 4, and the driven pulley 3 has a fixed pulley 8 fixed to the driven shaft 7 and a movable pulley 9 that slides with respect to the driven shaft 7. A V-belt 10 is hung between the drive pulley 2 and the driven pulley 3 to form a continuously variable transmission. The continuously variable transmission is covered by a cover 11 attached to the case 1 from the outside. A bearing B3 that supports the end of the drive shaft 4 and a bearing B1 that supports the tip of the driven shaft 7 are provided inside the cover 11. The case 1 is also provided with a bearing B4 for supporting the drive shaft 4 and a bearing B2 for supporting the driven shaft 7. A plurality of mounting bolts 12 are arranged on the outer periphery of the cover 11, and the cover 11 is mounted on the case 1 via the mounting bolts 12, 1.

As shown in FIG. 1, when the continuously variable transmission is driven, inward forces F1 and F1 act, and the forces are transmitted to the cover 11 via the bearings B1 and B3, which are conventionally used. In addition, the vicinity of the center between the drive shaft center 4C and the driven shaft center 7C is the portion with the weakest rigidity, and the forces of F1 and F1 act to cause the cover 11 to expand to the outside F2. , F2 causes deformation, and the bearing centers of the bearings B1 and B3 of the cover 11 are deviated, which adversely affects internal parts, and the vibration of the cover 11 is large.

Therefore, in this example, a pair of knock pins 13 and 13 are arranged at a right angle in a substantially central portion of a straight line connecting the drive shaft center 4C and the driven shaft center 7C, and the knock pins 13 and 13 are removed from the cover 11. The cover 11 and the case 1 are firmly positioned and fixed by a tight fit or an interference fit toward the case 1, and the force of F2 and F2 that spreads outward by the knock pins 13 and 13 causes the cover 11 to move. The deformation is satisfactorily prevented, the rigidity of the cover 11 is increased, the vibration of the cover 11 is reduced by that amount, and the deviation or the like does not occur.

[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 in a distributed manner and that has a pair of knock pins that suppress the deformation of the cover in a direction perpendicular to the straight line connecting the drive shaft and the driven shaft of the cover. Since the weak part of the cover is reinforced with a knock pin and the cover can be firmly positioned and fixed to the case via the knock pin, deformation and displacement of the cover are eliminated, and rigidity of the cover is increased to reduce vibration and good noise generation It has the effect that can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of a cover.

FIG. 2 is a side sectional view showing the structure of a continuously variable transmission installed inside a cover.

[Explanation of symbols]

 1 Case 2 Drive Pulley 3 Driven Pulley 4 Drive Shaft 4C Drive Shaft Center 7 Driven Shaft 7C Driven Shaft Center 10 V Belt 11 Cover 12 Mounting Bolt 13 Knock Pin

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, wherein a pair of knock pins for suppressing deformation of the cover are provided in the vicinity of substantially the center of a straight line connecting the drive shaft and the driven shaft of the cover. A cover mounting structure for a continuously variable transmission, which is characterized in that