JPH0654912U - Speedometer sleeve mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] When tightening the lock plate fixing bolts or cable mounting screws, it is possible to prevent excessive pressing force from acting on the sleeve or to prevent it from falling, and (EN) Provided is a speedometer sleeve mounting structure capable of preventing loosening. [Structure] Insert the speedometer sleeve into the hole of the transmission case, engage the lock plate with the locking groove formed on the outer peripheral surface of the speedometer sleeve, and fasten the lock plate to the transmission case with bolts. By doing so, the speedometer sleeve is prevented from coming off from the transmission case. At least a portion of the lock plate engaged with the locking groove is formed in a convex arc shape toward the bottom surface of the locking groove.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention has a speedometer sleeve mounting structure in which a speedometer cable is inserted, particularly a speedometer sleeve is inserted into a hole of a fixing member such as a case, and a lock plate is provided in a locking groove formed on an outer peripheral surface of the speedometer sleeve. The present invention relates to a speedometer sleeve mounting structure in which a speedometer sleeve is attached to a fixing member by locking the lock plate to a fixing member with a bolt so as to prevent the speedometer sleeve from coming off.

[0002]

[Prior art]

 Conventionally, a pinion that engages with a drive gear of a transmission is provided at one end of a speedometer cable, and a speedometer sleeve that rotatably supports the pinion shaft is inserted into the transmission case. A locking groove is formed on the outer peripheral portion of the speedometer sleeve in a direction orthogonal to the axis, and the speedometer sleeve is attached by fastening a lock plate that engages with this groove to the transmission case with a bolt. Japanese Utility Model Publication No. 56-117364).

FIG. 1 shows an example of a conventional speedometer sleeve mounting structure. 1 is a transmission case, 2 is a drive gear, 3 is a speedometer sleeve, 4 is a pinion, 5 is a pinion shaft, and 6 is a pinion shaft. A speedometer cable, 7 is a cable mounting screw, 8 is a lock plate, 9 is a lock plate fixing bolt, and 10 is an O-ring. The speed meter sleeve 3 is inserted into the hole 1a of the transmission case 1, and an O-ring 10 seals between the hole 1a and the sleeve 3. The screw 7 provided at the end of the speedometer cable 6 is screwed into the male screw 3b of the sleeve 3, and the flat end 6a of the cable 6 is inserted into the split groove 5a of the pinion shaft 5 for connection. There is. Therefore, the rotation of the drive gear 2 is transmitted to the speedometer (not shown) via the pinion 4, the pinion shaft 5 and the cable 6. As shown in FIG. 2 (a), the lock plate 8 is formed of a front and rear circular metal plate, and its square portion is engaged with the locking groove 3 a of the speedometer sleeve 3. When the bolt 9 tightens the bolt 9, the lock plate 8 also rotates in the tightening direction, so that the edge portion 8a may bite into the bottom surface of the locking groove 3a of the speedometer sleeve 3. Also, when the cable mounting screw 7 is screwed into the male screw 3b of the sleeve 3, the sleeve 3 also rotates together, so that the bottom surface of the locking groove 3a is the edge portion 8b of the lock plate 8 as shown in FIG. 2B. May cut into.

[0004]

[Problems to be solved by the device]

When the edges 8a and 8b of the lock plate 8 bite into the bottom surface of the locking groove 3a in this manner, the lock plate 8 cannot return to its original position, so that the sleeve 3 is strongly pressed against the transmission case 1 and the O-ring. The cushion effect of 10 does not work, and vibrations such as gear noise of the transmission are directly transmitted to the speedometer cable 6. Further, since the sleeve 3 is tilted with respect to the transmission case 1, gear wear due to a change in the axial distance between the pinion 4 and the drive gear 2 increases. Further, when the screw 7 is tightened, the force in the direction indicated by the broken line arrow in FIG. 2B acts on the lock plate 8, so that the bolt 9 may loosen. Therefore, an object of the present invention is to prevent an excessive pressing force from acting on the sleeve and to prevent the bolt from falling when tightening the lock plate fixing bolt or the cable mounting screw. It is to provide a mounting structure for a speedometer sleeve that can prevent the loosening of the.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention inserts a speed meter sleeve into a hole of a fixing member such as a case, engages a lock plate with a locking groove formed on an outer peripheral surface of the speedometer sleeve, and In a speedometer sleeve mounting structure in which the speedometer sleeve is secured to the fixing member by fastening the plate to the fixing member with bolts, engages at least the locking groove of the above lock plate. The formed portion is formed in a convex arc shape toward the bottom surface of the locking groove.

[0006]

[Action]

 The lock plate rotates around the bolt when tightening the bolt, but the engaging portion of the lock plate that engages with the locking groove of the speedometer sleeve is formed in a convex arc shape, so The part does not come into contact with the bottom surface of the locking groove, or even if it comes into contact, it will come into contact with the surface and will not bite. Also, when the screw of the speedometer cable is tightened, the lock plate and the locking groove only come into surface contact, so the tightening force is released, the sleeve returns to the free position, and the sleeve becomes the fixed part. It can suppress being pressed and falling. Furthermore, even when the screw of the speedometer cable is tightened, the lock plate exerts a force almost in the center direction, so that the bolt is unlikely to come loose.

As for the shape of the lock plate, the convex arc surface may be a concentric arc centered on the bolt, or an arc having a larger radius of curvature or a smaller arc than that, the same effect is obtained. However, if the engagement part is concentric arcuate, even if the lock plate rotates, the pressing force against the speedometer sleeve does not work because the distance between the outer peripheral surface of the lock plate and the bottom surface of the locking groove is constant. There is an advantage. Furthermore, when the lock plate is a concentric disc, it is not necessary to stop the lock plate, which is more convenient.

[0008]

【Example】

 3 (a) and 3 (b) show a first embodiment of a speedometer sleeve mounting structure of the present invention. In the figure, all parts except the lock plate are the same as those in FIGS. The lock plate 11 used in the present invention comprises a disk-shaped washer, and a bolt 9 is inserted through the center of the washer, and the bolt 9 is screwed to the transmission case 1. A part of the outer peripheral portion of the lock plate 11 is engaged with the locking groove 3 a of the speedometer sleeve 3 to prevent the speedometer sleeve 3 from coming off the transmission case 1.

Since the outer periphery of the lock plate 11 has a constant distance (radius) R from the bolt 9, even if the lock plate 11 rotates when the bolt 9 is tightened, the outer periphery of the lock plate 11 remains Since the bottom surface of the locking groove 3a is not crimped, the pressing force does not act on the sleeve 3. On the other hand, when the cable mounting screw 7 (see FIG. 1) is screwed onto the speedometer sleeve 3, the sleeve 3 rotates together, and the bottom surface of the locking groove 3a is the lock plate 11 as shown in FIG. 3 (b). It hits the outer peripheral part of the, but does not bite due to the contact. When the tightening torque to the screw 7 is released, the sleeve 3 returns to its original free position due to the reaction force of the O-ring 10 (see FIG. 1), so that the sleeve 3 is pressed against the transmission case 1. , Never lean. Therefore, vibrations such as gear noise can be directly transmitted to the speedometer cable 6 and troubles such as increased wear of the pinion 4 can be prevented. Further, since the direction of the force F acting on the lock plate 11 when the screw 7 is tightened is the direction of the bolt 9 located at the center position of the lock plate 11 as shown in FIG. 3B, the bolt 9 does not loosen. . If a circular washer is used as the lock plate 11 as described above, it is inexpensive and needless to prevent the lock plate 11 from rotating at a fixed position. Therefore, there is an advantage that the mounting work is very simple. .

FIG. 4 shows a second embodiment of the present invention. In this embodiment, as the lock plate 12, a substantially fan-shaped metal plate in which a portion including the engaging portion 12a engaged with the locking groove 3a of the speedometer sleeve 3 is arcuate is used. Also in this case, as in the first embodiment, the bottom surface of the locking groove 3a contacts the engaging portion 12a of the lock plate 12 when the cable mounting screw 7 (see FIG. 1) is tightened. The sleeve 3 is not pressed against the transmission case 1 or tilted.

FIG. 5 shows a third embodiment of the present invention, and FIG. 6 shows a fourth embodiment. FIG. 5 shows an example of a substantially fan-shaped lock plate 13 having an engagement portion 13a having a large radius of curvature not centered on the bolt 9, and FIG. 6 shows an engagement portion 14a having a small radius of curvature not centered on the bolt 9. It is an example of a substantially fan-shaped lock plate 14 that has. In either case, almost the same effects as those of the first and second embodiments can be obtained.

[0012]

[Effect of device]

 As is apparent from the above description, according to the present invention, the portion engaged with the locking groove of the lock plate is formed in a convex arc shape, so that when the bolt or the cable mounting screw is tightened, the engaging portion Does not come into contact with the bottom surface of the locking groove, or even if it comes into contact with the bottom surface, it does not bite. Therefore, it is possible to prevent the sleeve from being pressed against the fixing member or tilting, preventing transmission of gear noise or the like to the speedometer cable and increasing wear of the pinion. Further, when the screw of the speedometer cable is tightened, the force acting on the lock plate acts almost in the center direction with respect to the lock plate, so that the bolt is unlikely to loosen.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of a conventional speedometer sleeve mounting structure.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view of the first embodiment of the present invention showing the engaged state of the speedometer sleeve and the lock plate.

FIG. 4 is a sectional view of a second embodiment of the present invention showing an engaged state of a speedometer sleeve and a lock plate.

FIG. 5 is a sectional view of a third embodiment of the present invention showing an engaged state of a speedometer sleeve and a lock plate.

FIG. 6 is a sectional view of a fourth embodiment of the present invention showing an engaged state of a speedometer sleeve and a lock plate.

[Explanation of symbols]

 1 Transmission case (fixing member) 1a hole 3 Speedometer sleeve 3a Locking groove 4 Pinion 6 Speedometer cable 7 Cable mounting screw 9 Lock plate fixing bolt 10 O-ring 11-14 Lock plate

Claims (1)

[Scope of utility model registration request] 1. A speedometer sleeve is inserted into a hole of a fixing member such as a case, a lock plate is engaged with a locking groove formed on an outer peripheral surface of the speedometer sleeve, and the lock plate is fixed to the fixing member with a bolt. In the speedometer sleeve mounting structure in which the speedometer sleeve is secured to the fixing member by tightening and fixing, the portion engaged with at least the locking groove of the lock plate is the locking groove. A speedometer sleeve mounting structure, which is formed in a convex arc shape toward the bottom surface.