JP3461790B2 - Metal belt element, metal belt and method of assembling metal belt - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an element for a metal belt, which is laminated in the extension direction of an endless belt-shaped metal band which is hung between a driving pulley and a driven pulley, and a large number of elements are laminated. The present invention relates to an arranged metal belt and a method for assembling the metal belt.

[0002]

2. Description of the Related Art For example, a metal belt used in a continuously variable transmission of an automobile has an endless belt-shaped metal band,
A large number of flat plate-shaped elements formed by punching out metal plates are laminated and arranged so as to be relatively slidable in the longitudinal direction of the belt.

[0003]

In this case, since the element is composed of one plate material by punching as described above, the weight of the element cannot be reduced. Therefore, when the element is moved to the pulley of the continuously variable transmission, the element orbits on a circular orbit.However, if the weight of the element, that is, the mass is large, the element has a large centrifugal force due to its own weight. Power acts. In addition, a large inertia acts when the vehicle is accelerated or decelerated. These excessive centrifugal force and inertia lead to deterioration of responsiveness and the like, and hinder smooth operation of the continuously variable transmission. Therefore, if the element is heavy, these problems become apparent. Furthermore, if the element is composed of a single plate material, when an excessive load or force acts on the element due to contact with the pulley, the element is hardly deformed and the load or force can be released. It caused damage or abnormal wear of the element, band and pulley. The present invention has been made by paying attention to the problems existing in such conventional techniques. An object of the present invention is to provide a metal belt element, a metal belt, and a method for assembling a metal belt, which enable smooth operation in power transmission of a continuously variable transmission.

[0004]

In order to achieve the above object, in the invention described in claim 1, an endless belt-shaped metal band extended between a drive pulley and a driven pulley is extended. In the element for metal belts, which are stacked in the direction, use wire rods that do not have corners in the cross-sectional shape, and hook-shaped parts are erected on the left and right in a continuous manner to the body part, for band insertion between both hook-shaped parts The primary processed body that is bent to form the opening becomes a secondary processed body that has been reduced in size to the desired thickness and has an expanded outer shape. Is a single body in which both side edge slanted surfaces of a tertiary processed body pressed into a desired shape dimension are pressed to form an uneven surface, and the same surface is dimple-shaped, and the body portion between the hook-shaped portions is The band mounting surface is in the band width direction In addition to being formed in a medium-high arc shape, the arc-shaped portion of the wire rod is left in the band traveling direction, and the body portion is provided with an engagement means for aligning traveling of adjacent elements when going straight. Is characterized by. Therefore, the element has an insertion opening portion and an opening portion corresponding to the insertion opening portion formed in the central portion thereof, so that the weight of the element can be reduced and the weight of the entire metal belt can be reduced. 20-30% for the entire belt
It has become possible to reduce the weight). Therefore, the inertia is reduced, and the responsiveness associated with acceleration / deceleration can be expected to be improved. Moreover, since the element can use a wire as a processing material, it is inexpensive. In addition, since the element is formed by stamping, the inclined portions on both ends to which the friction driving force is transmitted from the pulley are formed on the uneven surface, so that the inclined portions on both ends quickly divide the oil reservoir to increase the contact friction force. Therefore, the continuously variable transmission can be operated smoothly.

According to a second aspect of the present invention, in the first aspect, the engaging means includes a protrusion and a recess formed on the back surface side of the protrusion. According to a third aspect of the invention, in the first or second aspect, the engaging means is a left and right pair. Therefore, the inclination of the element can be prevented and a smooth power transmission operation can be obtained. In the invention described in claim 4, in the metal belt, the element described in any one of claims 1 to 3 is used as the element.
Therefore, the same effect as that described in claim 1 can be obtained. In a fifth aspect of the present invention, in the fourth aspect, the band is a band main body in which a plurality of layers having a width narrower than the insertion opening of the element are stacked, and the band main body is superposed on the band main body and is wider than the insertion opening. It is provided with a fall-off prevention body. Thus, wide captive body may, if only one, it is possible to reduce the weight of the entire metal belts, can contribute to an improvement in responsiveness. According to a sixth aspect of the present invention, in the fifth aspect, the fall-preventing body has a through hole for reducing weight and rigidity. For this reason, the weight of the fall-out prevention member can be reduced, and the weight of the entire metal belt can be reduced. Further, since the rigidity of the fall-out prevention member is reduced, the flexibility along the circular arc of the pulley is improved, which contributes to smooth power transmission. Moreover, as the rigidity of the fall-out prevention member is reduced, the element can be easily assembled to the band. According to the invention of claim 7, in the method of assembling a metal belt, the band-shaped end-prevention stopper is superposed on the band, and the stopper is bent in its width direction. The metal belt element according to any one of 3 above is attached to the band through the insertion opening, and the hook-shaped portion is engaged with the drop-out prevention body in a state where the bending is restored.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of implementation embodying the present invention will be described in detail with reference to the drawings. The first embodiment will be described in detail with reference to FIGS.
The upper and lower sides in this Embodiment 1 are shown in FIGS.
0, the vertical direction of FIG. 12, FIG. 15, and FIG. 18, and the left and right means the horizontal direction of those drawings. Further, the front and rear means the front direction and the back direction when viewed from the paper surface of those figures. As shown in FIGS. 1 and 3, a drive pulley 12 is attached to the drive shaft 11, and a substantially V-shaped annular groove 13 is formed on the outer periphery thereof. A driven pulley 15 is attached to a driven shaft 14 corresponding to the drive shaft 11, and a substantially V-shaped annular groove 1 is provided on the outer periphery thereof.
6 is formed. Drive pulley 12 and driven pulley 1
An endless metal belt 17 is hung between the annular grooves 13 and 16 of the drive belt 5 so that the drive pulley 12 rotates when the metal belt 1 rotates.
It is transmitted to the driven pulley 15 via 7. 2 and 3
As shown in FIG. 3, the metal belt 17 is formed of an endless metal band 18, a large number of metal elements 19, and the outer periphery of the band 18 so as to be slightly wider than the band 18 and form an endless band. It is composed of a metal drop-off prevention member 20.

[0007] The elements 19 are arranged so as to be slidable relative to each other in the longitudinal direction of the band 18 so that the band 18 passes through the inside thereof. The band 18 is formed by stacking and stacking a plurality of thin metal plates in the plate thickness direction, and as shown in FIG.
Surface profiling is formed on either or both surfaces by sandblasting or shot peening. Lubricant is retained in the surface profiling to reduce the frictional resistance between the band 18 and each element 19. As shown in FIGS. 6 to 9, each of the elements 19 firstly cuts a metal wire rod 19a having a circular cross section formed by drawing into a predetermined length, and bends it into a shape close to the final shape of the element 19. To be This is designated as a primary processed body 19A. The primary processed body 19A is formed with a body portion 31 extending in the left-right direction and a pair of pillar portions 32 as hook-shaped portions that are provided upright from both ends of the body portion 31.

Next, as shown in FIGS. 10 and 11, the primary processed body 19A is pressed to form a flat secondary processed body 19B having a desired thickness.
Further, with respect to this secondary processed body 19B, as shown in FIGS.
As shown in 5, the press machining is performed, tertiary worked body 1
9C. By this press working, the body portion 3
1 band mounting surface 31a and inner lower surface 3 of the pillar portion 32
2a, that is, the outer peripheral portion of the secondary processed body 19B is cut off by pressing (blanking), leaving mainly the surfaces 31a and 32a that come into contact with the band 18 from above and below, and both side edges 37 as the second inclined portion. Is formed. Next, an uneven surface 37a is formed by press working (stamping) on the inclined surfaces of the both side edges 37 to finish it into a dimple shape to obtain a quaternary processed body 19D. Therefore,
The shape of the outer peripheral surface of the metal wire rod 19a remains on the band mounting surface 31a and the inner lower surface 32a.
1a and 32a have an arc shape. Band mounting surface 31
The arc of a prevents the band 18 from meandering left and right. Between the pillar portions 32 and the band mounting surface 31a, there is formed a recess 30 wider than the band 18 and the cap 20 for accommodating them. An insertion opening 34 that is slightly wider than the band 18 and slightly narrower than the cap 20 is formed between the tips of the pillars 32. The element 19 is supported by the band 18 in the recess 30.

A first inclined portion 36 is formed on one side surface of the body portion 31 of the element 19 so as to incline downward in a direction in which the plate thickness decreases. This first inclined portion 36
Is the element 19 as shown in FIGS.
To allow the rows of to be curved along the outer circumference of the pulleys 12,15 at the portions of the pulleys 12,15. In addition, as shown in FIGS. 10 and 11, the first inclined portion 36 is a secondary processed body.
It is formed at the stage of 19B . Both side edges 37 of the body portion 31 converge downward. The both side edges 37 are engaged with the inner side surfaces of the annular grooves 13, 16 of the pulleys 12, 15. The both ends 37 having the dimple-shaped concavo-convex surface 37a can divide the oil sump to increase the contact frictional force with the pulley. A pair of left and right engaging protrusions 33 is formed on the body portion 31. A recess 39 is formed in the body portion 31 on the back surface side of the engagement protrusion 33. Then, the engaging projections 33 and the recesses 39 of the adjacent elements 19 are fitted to each other, and the elements 19 are aligned and connected. The engagement protrusion 33 and the recess 39 constitute an engagement means. Similar to the band 18, the surface profiling is formed on the entire outer peripheral surface of the element 19 by sandblasting or shot peening, and the surface profiling retains lubricating oil to reduce frictional resistance between the elements 19. .

As shown in FIG. 4 and FIG.
A plurality of long holes 40 are provided at 0, and a small hole 40 a is provided adjacent to the long holes 40. The pair of long holes 40 are provided at a plurality of positions at equal intervals, but they may be provided continuously over the entire circumference of the cap 20. Further, surface profiling is formed by sand blasting or shot peening on both surfaces of the cap 20 to prevent the cap 20 from retaining the cap 20 and the outermost band 18 and each element 1.
The frictional resistance with 9 is reduced. Then, FIG. 4 and FIG.
16 to 18, the cap 20 is fitted on the outer periphery of the band 18, a tool (not shown) is hooked on the small hole 40a, and the width of the cap 20 is narrowed by the tool. As a result, the fall-out prevention member 20 is brought into the narrowly bent state shown in FIGS. 16 and 18. In this state, the falling prevention body 20 is slightly narrower than the width of the insertion opening 34 of the element 19. Then, as shown in FIGS. 16 and 17, the element 19 is supported by the band 18 through the insertion opening 34 of the element 19, and the elements 19 are sequentially fed in the length direction of the band 18, so that all the elements are After passing through 19, remove the tool. In this state, the fall prevention body 20 returns to a wide flat plate state in which the side end portion of the element 19 is engaged with the engagement protrusion 33. Therefore, in this state, the element 19 is prevented from falling off the band 18.

Next, the effect exerted by the above embodiment will be described. Since the element 19 is provided with the insertion opening 34 corresponding to the width of the band 18, it is possible to reduce the weight of the element 19 and the weight of the metal belt 17 as a whole (20 to 30% of the metal belt as a whole). It has become possible to reduce the weight).
For this reason, the inertia of the entire metal belt 17 is reduced, and improvement in responsiveness associated with acceleration / deceleration can be expected. Moreover, since the element 19 is composed of the drawn wire rod, it is inexpensive. Also, the element 19
Since it has the pillar portions 32 on both sides thereof, it is strong and hardly damaged. Since both side edges 37 of the element 19 are cut off by press working, the end surface area of each side edge 37 can be increased. Therefore, both side edges 37
Since it is possible to increase the contact area between the pulley 12 and the pulley 12, 15, it is possible to reduce the concentration of stress acting on the element 19, not only improve the durability of the element 19,
As a smooth metal belt 17, a power transmission operation can be obtained. The outer peripheral arc of the metal wire 19a is left in the portion of the element 19 that is in contact with the band 18 and the fall prevention body 20, and no edge is formed, and the element 19 has a substantially arc shape. Therefore, the element
Almost no damage is given from 9, and the life of the metal belt 17 can be secured for a long time. The engagement of the engagement protrusion 33 of the element 19 and the disengagement prevention body 20 can surely prevent the disengagement of the element 19. Further, since only one piece of the fall prevention body 20 is provided to prevent the element 19 from coming off, the structure does not become complicated. Since the element 19 is supported by the band 18 by utilizing the flexural deformation of the cap 20, the assembly is extremely easy. Since the long hole 40 and the small hole 40a for flexibly deforming the fall prevention body 20 are formed in the fall prevention body 20, it is possible to contribute to weight reduction of the entire metal belt.

(Other Embodiments) The present invention is not limited to the above embodiments, but may be embodied as follows. -Change the shape of the element 19 in various ways. For example,
A through hole may be formed in the body portion 31 in order to promote weight reduction. -Providing the engaging protrusion 33 and the concave portion 39 as engaging means on both pillar portions, respectively. -The connection between the adjacent elements 19 is performed by the engagement protrusion 33.
It is not limited to the fitting between the concave portion 39 and the concave portion 39.
You may make it warp in the connection direction of 9 comrades, and may carry out by those engagement. In the embodiment, the cap 20 is bent and the element 19 is supported by the band 18. However, the element 19 is slanted so that one side edge of the cap 20 is positioned in the recess 30. Then, the band 18 may be housed in the recess 30 by rotating the element 19 around one side edge of the drop-out prevention body 20. In the above-mentioned embodiment, the wire having a circular cross section is used, but the wire having a quadrangular cross section whose corners are chamfered in an arc shape may be used. The element 19 should be made of two or more different metallic materials, and the elements of different materials should be arranged in order so as to be adjacent to each other. With this configuration,
Since the natural frequencies of the adjacent elements 19 are different, vibration and noise can be reduced. The element 19 is made of a material different from that of the above embodiment, for example, an iron-based metal other than hard steel, stainless steel, or the like. -Surface hardening treatment should be applied to both side edges 37 of the element 19.

[0013]

As described above, according to the present invention, the weight of the element can be reduced, the weight of the metal belt as a whole can be reduced, the inertia can be reduced, and the responsiveness associated with acceleration / deceleration can be improved. Can be expected. Moreover, since the element can use a wire as a processing material, it is inexpensive .

[0014]

[Brief description of drawings]

FIG. 1 is a side view showing the entire metal belt.

FIG. 2 is a partial side sectional view showing a part of a metal belt.

FIG. 3 is a vertical side view showing a part of the metal belt in an enlarged manner.

FIG. 4 is a plan view showing the same metal belt.

FIG. 5 is a front view showing a captive body.

FIG. 6 is a front view showing a primary processed body.

FIG. 7 is a plan view of the same.

FIG. 8 is a sectional view of the same taken along the line AA.

FIG. 9 is a cross-sectional view of a wire rod.

FIG. 10 is a front view of a secondary processed body.

FIG. 11 is a side view of the same.

Figure 12 is a front view of the element shown in connection with the secondary working body (tertiary workpiece).

FIG. 13 is a plan view of the same.

FIG. 14 is a sectional view of the same.

FIG. 15 is a side view of an element (quaternary processed body) shown in relation to a tertiary processed body.

FIG. 16 is a plan view showing a process of assembling the metal belt.

FIG. 17 is a side view of the same.

FIG. 18 is a sectional view of the same.

[Explanation of symbols]

17 ... Metal belt, 18 ... Band, 19 ... Element,
19a ... Wire rod, 20 ... Fall prevention body, 30 ... Recessed portion, 31 ...
Body part, 31a ... Band mounting surface, 32 ... Pillar part, 3
3 ... Engagement protrusion, 34 ... Insertion opening, 36 ... First inclined portion. 37 ... Both side edges, 39 ... Recesses.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-35138 (JP, A) JP-A-59-131052 (JP, A) JP-A-2001-193796 (JP, A) Sankaihei 3-72139 (JP, U) Actual Kaihei 4-56242 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16G 1/00-9/04 B21F 45/00-45/24

Claims (7)

(57) [Claims] 1. A metal belt element, which is laminated in the extension direction of an endless belt-shaped metal band mounted between a drive pulley and a driven pulley, wherein a wire rod having no cross-sectional corners is used. The primary processed body, in which the hook-shaped parts are erected on the left and right in a continuous manner to the body part and bent so that the band insertion opening is formed between the hook-shaped parts, is reduced to the desired thickness. In addition, it becomes a secondary processed body with an expanded outer shape, and the secondary processed body is pressed, and both side edge slanted surfaces of the tertiary processed body whose external shape is pressed to the desired shape dimension are pressed. The band mounting surface of the body part between the hook-shaped parts is formed in a middle-high arc shape in the band width direction, and is in the band running direction. At the wire Jo portion is left, the element metal belt body portion, wherein the engaging means for the alignment traveling during straight elements between adjacent are provided. 2. An element for a metal belt according to claim 1, wherein the engaging means comprises a protrusion and a recess formed on the back surface side of the protrusion. 3. The element for a metal belt according to claim 1, wherein the engaging means is a left and right pair. 4. A metal belt in which a large number of elements are laminated in the extension direction of an endless belt-shaped metal band that is mounted between a drive pulley and a driven pulley, and the element is one of claims 1 to 3. A metal belt using the one described in any one of 1. 5. The band includes a plurality of laminated band main bodies having a width narrower than that of the insertion opening of the element, and a fall prevention member which is overlapped with the band main body and has a width wider than the insertion opening. The metal belt according to claim 4. 6. The falling-off prevention member is a metal belt according to claim 5, characterized in that with a hole for the weight and rigidity mitigation. 7. A method of assembling a metal belt in which a large number of elements are laminated in the extension direction of a metal band having an endless belt shape, wherein the endless belt drop-off prevention body is polymerized on the band, and the drop-out prevention body is formed. Claim 1 in the state where it was bent in the width direction.
4. A method for assembling a metal belt, wherein the metal belt element according to any one of items 1 to 3 is attached to a band through its insertion opening, and the hook-shaped portion is engaged with a dropout prevention member in a state where the bending is restored.