JPS5824640A - Transmission v-belt - Google Patents

Abstract

PURPOSE:To facilitate adjustment of tighting allowance in a V-belt suitable for a V-belt system stepless transmission interconnecting a plurality of V-shaped blocks endlessly, by enabling one V-shaped block to be removed for adjusting tighting allowance under the assembled condition of V-belt. CONSTITUTION:This transmission V-belt consists of three types of V-shaped blocks 6-8, the V-shaped block 6 constituting a main section having both inclined side surfaces 6a frictionally engaging surfaces 5 opposed to V-groove of pulley and band contact surfaces 6b frictionally contacting a pair endless band 1. The block 6 has a hook 6c erected upward and provided on both sides with a projection 6d and recess 6c respectively. While the V-shaped blocks 7, 8 are formed approximately similarly, the block 7 is formed on both sides of the hook 7c with projections 7d, 7e and the block 8 is formed on a projected portion 8c with a cut-out groove 8d engaging projections 6d, 7d for adjusting tighting allowance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission V-belt used in a V-belt type continuously variable transmission and the like.

As this power transmission V-belt, for example, JP-A-Sho 1! r −
One disclosed in Japanese Patent No. 1004A-3 is known. As shown in FIGS. 1 and 2, this transmission V-belt has a plurality of band transducers /a, /b.

/c, /d'f: comprises an endless band l formed by overlapping layers, holding the endless band in its width direction, and its inner circumferential surface (the inner surface of the innermost band resistor'/d) ) A large number of V-shaped blocks J in frictional contact with the endless band L are arranged without any gaps in the longitudinal direction of the endless band L. Such a transmission V-belt consists of a V-shaped block - 〇 both sides inclined surfaces 2
1 is the V* opposing surface of the primary pulley J and secondary pulley l as shown in FIG. For practical use, a hook is provided between these two pulleys 3 and 4c, as shown in FIG. 1, so that they are frictionally engaged with each other. During this practical use, the rotation of the primary pulley 3 is caused through the V-shaped block λ that frictionally engages with its V-groove opposing surface j, and the V-shaped block λ that frictionally engages with the V-groove opposing surface j of the endless band 11 secondary pulley l. The power is transmitted to the secondary pulley Hiroshi, and the transmission V-belt controls a predetermined power transmission function. If the frictional engagement arc diameter between the transmission V-belt and both pulleys 3.4A is changed by moving the surfaces jf relatively away from or approaching each other by the same amount, both pulleys 3.4A. The transmission ratio between the wheels changes continuously, and it can be constructed as a continuously variable transmission.@And, as shown in Fig. 2, each V-shaped block J is arranged on both sides in the belt running direction, and has protrusions b and It has a concave C, and the protrusion B is pawned into the concave C of the ■-shaped block λ adjacent to one side, and the concave C is pawn to the protrusion be* of the +V-shaped block adjacent to the other side. . As a result, the position of each V-shaped block in the direction perpendicular to the belt running direction is regulated by the V-shaped blocks on both sides, and the device is designed to prevent positional deviation between the V-shaped blocks in this direction. Therefore, in order to improve the durability of the power transmission V-belt, both during its manufacture and during its use, the optimum value is tightened by subtracting the circumference of the endless band l from the total thickness of the V-shaped block. It is necessary to make adjustments in advance, and this work is usually done by replacing the seven V-shaped blocks with ones of the thickness that optimize the tightness. In the transmission V-belt, each V-shaped block is arranged without any gaps in a state where it is engaged with the adjacent V-shaped block by the protrusion λb and the depression C.
When adjusting the tightness, I was unable to pull out the fm V-block, so I removed the endless band from each V-block, took each V-block apart, and did not reassemble it. In this case, we had to replace the seven V-shaped blocks with ones of a different thickness, which was very troublesome and involved adjusting the tightness.

The present invention has focused on such conventional problems, and has constructed a transmission V-belt assembly with seven V-shaped blocks for adjusting the tightness so that it can be removed even when the transmission V-belt is assembled, thereby solving the above-mentioned problems. Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In the present invention, three types of V-shaped blocks as shown in FIGS. Prepare OV type jib block 6 as shown in Fig. 3, 5 m of sloped surfaces on both sides that frictionally engage with the 1 pulley v groove pair j, and a pair of endless bands I (Figs. 1 and 1). The 0--V-shaped block B, which has a band contact surface 1b in frictional contact with the band contact surface 1b (see ), further has a 0--V-shaped block B that rises from between the band contact surface 1b and covers the outer circumferential surface of the endless band to hold it in its width direction. A hook 6c is provided integrally, and projections 4 are provided on both sides of the hook in the belt running direction.
The O V-shaped block 7 provided with the groove d and the depression 6e is also configured to have the same shape and dimensions as the V-shaped block 6, as shown in Figure 1, and is frictionally engaged with the pulley V-groove facing surface j (see Figure 1). A pair of endless band contact surfaces 7b, a hook 7c for holding the endless band in its width direction, and a protrusion 7d. However, the V-shaped block 7 is not provided with a recess like the recess 4e of the V-shaped block 6, and instead, a projection 7e similar to the projection 7d is aligned with the projection 7d and placed on the side of the hook 7c opposite to this projection. establish.

The V-shaped block t is a V-shaped block 6 as shown in FIG.
．． Like 7, it has sloped surfaces ra on both sides that frictionally engage with the pulley V-groove opposing surface j (see Figure 2) and a pair of endless band contact surfaces Ira, but the band contact surface does not have hooks, protrusions, or depressions. A raised portion rc rising from between tb and tb is integrally provided. Then, a notch groove rd that opens on the raised end surface of the raised part rc is formed, and this notch groove is bent in the right angle direction as shown by re in the bottom MelEj figure (b), and
The width of the protrusions 6d and 7e of the V-shaped block 6.7 is
) V-shaped blocks 4 to t configured in this way are of a size that allows entry into the position shown by the imaginary line K.
Assemble the seven transmission V-belts by arranging them as shown in the figure. In these figures, the V-shaped blocks are drawn so that there is a gap between them to make the drawings easier to understand, but in reality, the V-shaped blocks are closely spaced with the above-mentioned tight margin.

When assembling the seven transmission V-belts, prepare one each of ■-shaped blocks 7 and I, and use the V-shaped blocks 6 for everything else. Then, the V-shaped blocks 6 are sequentially turned in the same direction, and the protrusions Ad are inserted into the recesses 6e of the adjacent V-shaped blocks 4 while being combined, and each V-shaped block 6 thus combined is formed into a loop shape. Arrange. A pair of V-shaped blocks 6-1 and 6-2 now face each other.
is the depression 6e of the V-shaped block 6-1 and the V-shaped block 4-2.
The protrusion 6d of the V-shaped block 6-1 faces the depression 6 of the V-shaped block 6-1.
eInsert the protrusion 7d of the VCV type block 7 and assemble the V type block 7. Then, each block 4°7/(7
)' Assemble these endless bands by applying them to the contact surfaces Ab and 7b, and in this state insert the V-shaped block t between the V-shaped blocks 4-2 and 7 from the inner circumferential side of the endless band. to push or insert. At this time, the protrusion 6d of the V-shaped block 4-2 and the protrusion 7 of the V-shaped block 7 are inserted through the opening of the notched groove Ird, and then the V-shaped block r is pushed downward in FIG. 6
d, 7. are inserted into the bent bottom re of the notched groove, and the V-shaped block t is aligned with the adjacent block 6-2.7. Thus, each V-shaped block 4, 7. t are restrained in mutually aligned positions, each V in a direction perpendicular to the belt running direction.
There is no misalignment between the shape boots and the boots I
Refer to J3 (see II/Figure) When passing the hook between the two for practical use,
Each V-shaped block 6.7. Noise caused by collision of f and each V-shaped block A,7. This can prevent wear on the facing surface of I.

When adjusting the tightness, the endless band l can be pulled out toward the inner circumference by pushing the V-shaped block r1 in the opposite direction in the reverse order of the assembly.
This can be done 4 times without disassembling the transmission V-belt, that is, without removing the endless band l once and taking each V-shaped block apart.O After that, when assembling the block If a different thickness to obtain the predetermined tightness, By pressing and inserting between the V-shaped blocks 6-2 and 7 in the same manner as above, the tight margin adjustment is completed, and this work can also be done without disassembling the transmission V-belt, that is, without disassembling each V-shaped block. can be done.

Thus, the power transmission V-belt of the present invention has the above-mentioned structure, and has 1
Since the V-shaped block If can be attached and removed even when the V-belt is still assembled, the task of adjusting the tightness is to replace the V-shaped block R with one of appropriate thickness. This work can be done without disassembling the transmission V-belt, making this work extremely simple.

In addition, in the above-mentioned example, the bending bottom part re is set in the notch groove rd in the raised part rc of the Fiv-shaped block l to prevent the protrusions 6d and 7e from entering the notch @fd. Alternatively, the structure shown in the figure may be adopted. In this example, the bottom of the notch groove rd is not bent, and the through hole r (which crosses the notch groove 1d above the protrusion Ad, 7@) that has entered into it as shown in Figure (b) is formed into the raised part rc. form,
The protrusions 4d and 7e are inserted into the holes by the pins 2, respectively.
◎ In the configuration of this example, when adjusting the tightness of the V-shaped block l with the pin 2 removed from the throat, insert the V from the inner circumference of the endless band l. Since it can be inserted between the shaped blocks 7 and 4-2 and this can be done without disassembling the transmission V-belt, the object of the present invention can be achieved in the same manner as in the previous embodiment.

Note that the pin 2 does not have to be two as in the illustrated example, but has a protrusion 6d.
, 7e and 4 is enough for one.

[Brief explanation of the drawing]

Figure 1 is a side view showing a conventional power transmission V-belt passed around a pair of pulleys, Figure 2 (,) is a front view of the same V-shaped block, and Figure 2 (b) is the same V-shaped block. side view,
Figure 3 shows the V-shaped boy used in the V-belt according to the present invention.
@ J 1m (a), Fig. 3 (b), and Fig. 3 (c) are the plan view, front view, and side view, respectively.
Other ■-shaped blocks used in V-belts include the first factor (, ),
The factor (b) and FIG. 1(c) are respectively a plan view, a front view, and a side view, and FIG. ) Figure 91 (b) and Figure 1 (c) are the plan view, front view, side view, and Figure 1 Fi.
A plan view showing the tightness adjustment part of the power transmission V-belt of the present invention, FIG. 1 is a side view thereof, and FIG. 5 is a modification of the V-shaped block shown in FIG. 5. Figure 1 (b
), Figure (c) is a plan view, front view, and side view of the same V-shaped block, respectively, and there is one Ol...endless pan)
", J, 41...-11), z...Pulley V groove opposing surface, 6~!...V-shaped block, 4B, 7m,
Is □”Both @ inclined plane, 4b, 7b, rb...
Band contact surface, jc, 7cm... hook, 4d,
7d, 7. -... Protrusion, 4e... Hollow, tc.
...Protuberance, rd...notch groove, re...notch groove bent bottom, 11...through hole, ri...pin. Patent Applicant Nissan Motor Co., Ltd. Figure 1, Figure 2, Figure 3 (a) Figure 4 (a) Sasa Figure 5 Figure 6 Procedural Amendment (Method) % Formula % 1. Indication of the case 1982 Special Patent Application No. 122374 Z Name of Invention Transmission ■ Belt 3, Person making amendment Relationship to the case Patent applicant (39J month Nissan Motor Co., Ltd. Telephone number (581) 2241 (Representative) W1 January 26, 2016 6 , Target of amendment Figures 5 and 8 in the drawings are corrected as shown in Figure 5 (a) (b) (C)

Claims (1)

[Claims] 1. At the very beginning of the endless band, a large number of V-shaped blocks that come into frictional contact with the inner circumferential surface of the endless band are arranged in the longitudinal direction of the endless band without any gaps, and the inclined surfaces on both sides of each V-shaped block are connected to pulleys. In a power transmission V-belt that is used in frictional engagement with the V-groove opposing surface of the V-shaped block, all but one of the V-shaped blocks adjacent to each other are provided with protrusions and these protrusions arranged on both sides of the belt running direction. One V-shaped block is provided with a depression on both sides in the belt running direction of one of the two V-shaped blocks.
One of the other V-shaped fours adjacent to the shaped block
A protrusion penetrating into the recess and another protrusion are formed on each V-shaped block, and the other protrusion is inserted from the inside of the endless band into the other V-shaped block adjacent to the #V-shaped block a. When inserted between one of the V-shaped blocks and the other V-shaped block, a notch groove is provided into which the protrusion of both blocks and the protrusion on the side can enter, and the notch groove is provided. The other V-shaped block is provided with a means for preventing the foreign protrusions from penetrating into the other V-shaped block, and all the V-shaped blocks except the other V-shaped block are provided with a means to cover the outer circumferential surface of the endless band so that the endless band is A power transmission V-belt characterized by having a hook that holds it in the radial direction.