JPH0439180A - snow crawler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a crawler mainly used for snowmobiles and snowmobiles and other snow vehicles.

(Prior art) As this type of conventional technology, US Pat. No. 4,613,006
There are some disclosed in Japanese Patent Application Laid-Open No. 62-214069, etc.

In the former technique, lugs are integrally molded at regular intervals on the outer peripheral surface of a band-shaped main body made of an elastic material, and the main body is flat over its entire width, and no reinforcing material is provided inside the main body.

In the latter technology, lugs are integrally molded on the outer circumferential surface of the main body, and protrusions for preventing derailment are integrally molded on the inner circumferential surface of the main body. , a core metal at a position corresponding to the lug is buried.

(Problems to be Solved by the Invention) The former technology is lightweight because there is no reinforcing material in the main body, but it has a problem with durability due to low strength, and the latter technology uses other than circumferential tensile materials. Since the core metal is also buried in the
Although it has high strength, it is heavy and may reduce running performance.

In addition, in both of the above-mentioned conventional technologies, since the main body is flat over the entire width, it is difficult to run in a bank, and in the latter technology in particular, the core metal becomes an obstacle, making it difficult to run in a normal bank.
In the former technique, since the left and right side portions of the inner circumferential surface of the main body are the traveling locus of the rolling wheels, deformation of the main body in the width direction is difficult to occur.

A crawler suitable for such bank running can be found in a crawler for agricultural machinery disclosed in Japanese Utility Model Application No. 51-60036. In other words, this crawler has a main body with a flat central part in the left and right direction, and wing parts that slope outward and upward from the left and right sides of the central part, with lugs protruding from their outer circumferential surfaces, and a core metal embedded in the main body to form inner wings. A locking protrusion is formed that protrudes toward the peripheral surface.

However, in this crawler for agricultural machinery, the core metal is buried all the way to the wing, so it is heavy and there is no bending of the wing.If the core metal is removed, the rigidity of the wing cannot be obtained, and the lug is located in the center. The length gradually decreases from the wing section to the wing section, and there is a problem in that it is difficult to obtain effective traction when driving on a bank.

The first object of the present invention is to embed only a circumferential tensile member in the main body for reinforcement, and to divide the main body into a central flat part and left and right wing parts to enable bank running. By reinforcing the left and right engaging protrusions integrally molded with the left and right wing portions and the left and right wing portions with reinforcing rib portions, respectively, and by making the lug height of the left and right wing portions approximately the same height as that of the flat portion, the problems of the prior art described above can be solved. An object of the present invention is to provide a crawler for use on snow that can solve the problem.

A second object of the present invention is to provide a protrusion between the lugs on the outer peripheral surface of the main body at a position approximately corresponding to the side edge of the flat part to prevent skidding and to prevent cracks from occurring at the side edge of the flat part. The purpose of the present invention is to provide a snow crawler with improved performance.

(Means for solving the problem) The first specific configuration for solving the problem in the present invention is as follows:
A circumferential tensile body 9 is embedded in an endless belt-shaped main body 2 made of an elastic body,
Left and right engaging protrusions 4 that engage with the drive wheels 11 are provided on the inner peripheral surface 3 of the main body 2 at regular intervals in the circumferential direction, and lugs 7 are integrally molded on the outer peripheral surface 6 at regular intervals in the circumferential direction. A snow crawler which is divided into a flat part 2A at the center in the left and right direction, and left and right wing parts 2B which are curved outward and upward from the left and right side parts of the flat part 2A and whose width is narrower than the flat part 2A, The mating protrusions 4 are located on the left and right sides of the flat part 2A and are integrally molded with the main body 2, and there are reinforcing rib parts formed integrally with the left and right engaging protrusions 4 and the inner circumferential surfaces 3 of the left and right wing parts 2B. 5 is formed, and the lugs 7 are formed at substantially the same height from the flat portion 2A to substantially the side ends of the left and right wing portions 2B.

In addition to the first specific configuration, a second specific configuration of the present invention is such that, in addition to the first specific configuration, at least one pair of sideslip prevention protrusions 8 on the left and right sides are integrally molded on the outer peripheral surface 6 of the main body 2 between the lugs 1.
The left and right protrusions 8 are provided approximately corresponding to the side ends of the flat portion 2A.

(Function) The driving force of the drive wheel 11 is transmitted to the main body 2 of the crawler 1 via the pin 13 and the engagement protrusion 4. When driving on flat ground,
Mainly, the flat portion 2A of the main body 2 and its lug portions 7A act, and the straight running performance is almost the same as that of the conventional vehicle.

When traveling in a bank, not only the flat part 2A of the main body 2 but also the wing part 2B acts, and since the wing part 2B is curved outward and upward from the flat part 2A in advance, it easily follows the bank shape and the wing part 2B acts. Flat part 2 at lug part 7B of part 2B
Generates strong traction similar to A.

By the wing portion 2B following the bank shape, the flat portion 2
However, since the rigidity of the wing section 2B is increased by the reinforcing rib section 5, sufficient snow contact pressure of the wing section 2B can be obtained, and strong traction can be generated by the lug section 7B. enable.

In addition, the bending between the wing portion 2B and the flat portion 2 is as follows.
Cracks occur at the side ends of A, that is, the outer ends of the left and right engaging protrusions 4, and cracks are likely to occur at that location (although cracks may occur at the lugs 7 on the outer peripheral surface of the main body 6).
A protrusion 8 is provided in between, corresponding to that part, and this protrusion 8 prevents the occurrence of cracks. The protrusion 8 also prevents the snow between the lugs 7 and the crawler 1 from moving relative to each other in the lateral direction.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Figs. 1 to 5, the crawler 1 has an engaging protrusion 4 and a reinforcing rib part 5 integrally molded on the inner circumferential surface 3 of an endless belt-shaped main body 2 made of an elastic body such as rubber or synthetic resin, and has a ground-contacting side. A lug 7 and a sideslip prevention protrusion 8 are integrally molded on the outer peripheral surface 6 of the vehicle.

The main body 2 has the same wall thickness across the entire width (in the left-right direction), and has a flat portion 2A formed in the center in the left-right direction, and left and right wing portions 2B curved outward and upward from the left and right side portions of the flat portion 2A. Each width of the flat portion 2B is set to be narrower than that of the flat portion 2A, and the cross section is arcuate.

Inside the flat part 2A and left and right wing parts 2B of this main body 2,
One or more layers of circumferential tension members 9 are embedded. In the embodiment, the tensile member 9 is provided with three layers, with a cord layer 98 made of polyester or steel in the center, and thick woven layers 9B and 9C made of polyamide or the like on the inner and outer peripheral sides.
are respectively formed, and the cord layer 9A and the outer thick weave layer 9B are buried in a wide width from the flat part 2^ to the vicinity of the outer side of the left and right wing parts 2B, whereas the inner thick weave layer 9C is buried in the flat part 2A.
It is buried narrowly only on the left and right sides of the

A driving wheel 11, a driven wheel, and a rolling wheel can be transferred to the inner circumferential surface 3 of the flat portion 2A, and the driving wheel 11 is, for example, the L3.
As shown in Figure 4, pins 13 are provided on the outer periphery of two disks 12 at equal intervals in the circumferential direction.
Both ends of the pin 13 protruding outward from the shaft engage with the left and right engaging protrusions 4 to transmit rotational power.

The engagement protrusions 4 are protruded from the left and right sides of the flat portion 2A at regular intervals in the circumferential direction, and reinforcement is provided between the outer surface of each engagement protrusion 4 and the inner peripheral surface of each of the left and right wing portions 2B. A rib portion 5 is formed. Since the wing section 2B is curved outward and upward, the reinforcing rib section 5 has a length that decreases toward the outer end of the wing section 2B, and maintains the curved shape of each wing section 2B when no load is applied. At the same time, it improves the recovery performance when curved and deformed to follow the bank shape.

The circumferential thickness of the reinforcing rib portion 5 is thinner than that of the retaining protrusion 4, but it may be the same as that of the retaining protrusion 4 or even thinner than that shown in the figure. It may be formed halfway in the left-right direction.

The lugs 7 on the outer circumferential surface 6 of the main body 2 are protruded at regular intervals in the circumferential direction, corresponding to, for example, the retaining protrusions 4, and a portion 7A corresponding to the flat portion and a portion 7B corresponding to the left and right wing portions 2B are provided. The height is set to between the paths, and the portion 7B corresponding to the wing section 2B extends to the outer end of the wing section 2B.

There are two skid prevention protrusions 8 provided between the lugs 7 on the left and right sides, each protrusion 8 having the same height as the lug 7,
A pair of inner left and right protrusions 8 are located at positions approximately corresponding to the side edges of the flat portion 2A. That is, the outer end of the engagement protrusion 4 is located at the side end of the flat portion 2A, which forms a bent portion of the wing portion 2B, and the protrusion 8 is provided at a position that can reinforce this bent portion.

It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways. For example, the wall thickness of the flat part 2A of the main body 2 may be made thicker than that of the wing part 2B, the wing part 2B may be formed to have a flat cross section, or the tensile member 9 may be made up of either the cord layer 9^ or the thick woven layer 9B. Or it can be formed with two layers, one layer each,
Alternatively, the tensile member 9 may be buried only in the flat portion 2A, the lug 7 may be shifted in the circumferential direction with respect to the retaining protrusion 4, or the lug portions 7A and 7B may be discontinuous, or the anti-skid protrusion 8 may be
Only the protrusions 8 corresponding to the ends of the flat portion 2 may be formed, or three or more protrusions may be formed on each side, or the protrusions 8 and the lugs 7 may be formed continuously. Further, the drive wheel 11 may also have a structure in which the pin 13 largely protrudes from a single central disk.

(Effects of the Invention) According to the present invention described in detail above, the main body 2 in which the retaining protrusions 4 are provided on the inner circumferential surface 3 and the lugs 7 are provided on the outer circumferential surface 6 can be constructed without embedding a horizontal core metal. By embedding only the directional tensile member 9 to ensure strength in the circumferential direction and reduce weight, and by forming wing portions 2B that are curved outward and upward from the central flat portion 2A on the left and right sides of the main body 2, bank running is possible. In addition, the left and right engaging protrusions 4 are integrally molded with the main body 2 on the left and right sides of the flat part 2A, and reinforcing ridge parts 5 are formed integrally with the left and right engaging protrusions 4 and the wing parts 2B. By doing so, the wing portion 2B can be made to follow the volume 5 in a bank shape, and the rigidity of the engagement protrusion 4 and the wing portion 2B can be increased even without a core metal. Since the left and right wing portions 2B are formed at approximately the same height up to the side edges, traction can be strengthened when driving in a bank, and driving performance can be improved not only when driving on flat land but also when driving in a bank. .

Further, a flat portion 2 is provided between the lugs 7 on the outer peripheral surface 6 of the main body 2.
Since the anti-skid protrusion 8 is provided at a portion approximately corresponding to the A side end, it is possible to more reliably prevent the crawler 1 from skidding, and to prevent bending between the flat portion 2A and the wing portion 2B during bank travel. Also, the protrusions 8 can prevent cracks from occurring.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view taken along the line A-A in FIG. 4, FIG. 2 is an enlarged sectional view of the main part, and FIG. FIG. 4 is a sectional view, FIG. 4 is a plan view, and FIG. 5 is a bottom view. DESCRIPTION OF SYMBOLS 1... Crawler, 2... Main body, 2A... Flat part, 2B... Wing part, 3... Inner peripheral surface, 4... Engagement protrusion, 5... Reinforcement rib part, 6... Outer circumferential surface, 7... Lug, 7A... Flat part corresponding part, 7B... Wing part corresponding part, 8... Protrusion, 9... Tensile body, 11... Drive Ring, 13...pin. Patent applicant: Honda Motor Co., Ltd.
Top Otsu Tire Co., Ltd. 1

Claims (2)

[Claims] (1) A circumferential tensile body (
9) is buried, and a drive wheel (1) is embedded on the inner peripheral surface (3) of the main body (2)
Left and right engaging protrusions (4) that engage with the main body (2) are provided protrudingly at regular intervals in the circumferential direction, and lugs (7) are integrally molded on the outer circumferential surface (6) at regular intervals in the circumferential direction. A crawler for snow that is divided into a flat part (2A) in the center in the left and right direction, and left and right wing parts (2B) that curve outward and upward from the left and right side parts of this flat part (2A) and are narrower than the flat part (2A). The left and right engaging protrusions (4) are located on the left and right sides of the flat part (2A) and are integrally molded with the main body (2), and the left and right engaging protrusions (4) and the left and right wing parts (2B) are formed integrally with each other. A reinforcing rib part (5) is formed between the inner circumferential surface (3) and the inner peripheral surface (3), and the lugs (7) are substantially the same from the flat part (2A) to the substantially side ends of the left and right wing parts (2B). A snow crawler characterized by being formed with a height. (2) At least one pair of sideslip prevention protrusions (8) on the left and right are integrally molded between the lugs (7) on the outer peripheral surface (6) of the main body (2), and each of the left and right protrusions (8) has a flat part (2A). Claim (1) characterized in that it is provided substantially corresponding to the side edge of
) The snow crawler listed in ).