KR100605233B1 - Wire hook type rubber pad for steel crawler - Google Patents

Abstract

An object of the present invention is to facilitate the wear of the rubber crawler rubber pad and to prevent relaxation during use and to improve durability, wherein the rubber pad is mounted on the steel crawler, wherein the rubber-formed rubber member is formed of an iron core; A rubber layer is formed by covering the entirety of the iron core, and a detachable hook is provided at one end of the iron core, and a fixing bolt is protruded at the other end thereof, and a vertical gap between the hook and the rubber layer surface is formed. The rubber layer is formed to be narrower than the thickness of the shoe plate of the steel crawler, and the rubber layer coated on the iron core presses against the surface of the shoe plate while pressing the rubber layer while inclining the hook to the shoe plate. It relates to a coated rubber pad for steel crawler, characterized in that by fastening the nut to the bolt. .

Iron core, hook, bolt, pad, rubber layer, shoe plate, nut

Description

Wire hook type rubber pad for steel crawler {Wire hook type rubber pad for steel crawler}             

Figure 1 (a) is a perspective view of an embodiment of the present invention, (b) is an explanatory diagram for mounting the shoe plate, (c) is a partially enlarged explanatory diagram showing the relationship between the rubber layer and one end of the shoe plate.

Fig. 2 (a) is an enlarged sectional view of the state attached to the shoe plate, (b) is an enlarged plan view of the washer, and (c) is an enlarged sectional view of the washer.

Figure 3 (a) is a partially enlarged cross-sectional view showing a mounting state of another embodiment of the bolt, nut, (b) is an explanatory view of the fastening of the bolt, nut.

Figure 4 (a) is a cross-sectional view of another embodiment, (b) is an enlarged perspective view of a cross section of a part of the iron core, (c) is a partial cross-sectional enlarged view showing the buried state of the projecting piece, (d) is iron A partial cross-sectional enlarged perspective view of another embodiment of the core, (e) is a partial cross-sectional enlarged view showing a buried state of the protruding piece.

Fig. 5 (a) is a longitudinal side view, (b) is a sectional view of the bolt fastening portion, and (c) is an enlarged cross sectional view with a part omitted.

Fig. 6A is a perspective view of a rubber pad conventionally used, and Fig. 6B is a sectional view of the rubber pad in a fixed state.

<Description of the symbols for the main parts of the drawings>

1: steel core

2: hook

3: Bolt

4: rubber pad

5: rubber layer

6: shoe plate

7: Nut

Technical Field

The present invention is a pad coated with a rubber member on an iron core to be mounted on a steel crawler. The present invention relates to a steel crawler coated type for the purpose of facilitating the wear, shortening the time taken for wearing, and improving the adhesiveness of the rubber. It relates to a rubber pad.

Prior art

Conventionally, there is a hook for removal at one end and a nut is buried at the other side to protect

A hook pad having rubber attached to one side of an iron plate has been proposed.

In addition, there is a hook-type pad that attaches a hook and a pin to one end and fixes the pin to the mounting hole of the shoe plate while hooking the hook.

(Patent Document 1) Japanese Patent Laid-Open No. 10-119843

(Patent Document 2) Japanese Patent Laid-Open No. 11-286284

Invention of the patent document 1 has a problem of unfastening of the bolt and nut fastened to the opposite side in response to the vibration shock during use because there is a gap of the hook in the vertical direction of the ground plane.

In the invention of Patent Document 2, as shown in Fig. 6 (a), the pad which is subjected to vulcanization of rubber on the iron core is planted with bolts in the holes of the iron core as shown in Fig. 6 (b), and then popped with spacers such as washers or bushes. The bolts of the shoe plate are aligned with the bolt holes of the shoe plate, and the contact between the pad and the shoe plate is not in close contact with the rubber and iron. If it is used for a long time, the rubber member will age and the elasticity of the contact surface will drop. The dust penetrates into the gaps and shortens the life of the pads.

The present invention, which was created to solve the above problems, aims to facilitate the wearing of a rubber crawler rubber pad, to prevent loosening and loosening during use, and to improve durability.

The configuration of the present invention created to achieve the above object is as follows.

The present invention provides a rubber pad mounted to an iron crawler, wherein a vulcanized rubber member covers the entirety of an iron core to form a rubber layer, and a detachable hook is provided at one end of the iron core. Fixing bolt; is protruded, the vertical gap with respect to the surface of the rubber layer of the hook is formed narrower than the thickness of the shoe plate of the steel crawler, the hook is inclined to the shoe plate and then pressing while pulling the rubber layer The rubber layer coated on the iron core is pressed against the surface of the shoe plate and at the same time, it is characterized in that by fastening the nut to the bolt.

In addition, the present invention is a rubber pad mounted to the steel crawler, a rubber molded rubber member covering the whole of the core; to form a rubber layer; one end of the iron core detachable hook; is provided, the other At one end, a fixing nut; is embedded, the vertical gap with respect to the surface of the rubber layer of the hook is formed narrower than the thickness of the shoe plate of the steel crawler, while the hook is inclined to the shoe plate while pulling the rubber layer When pressed, the rubber layer coated on the iron core is pressed against the surface of the shoe plate and at the same time, it is characterized by fastening the bolt to the nut.

In another aspect, the present invention is characterized in that the rubber pad mounted on the steel crawler has a hook of a wire loop shape having a circular cross section at one or both ends of the iron core or the iron re-protection plate.

In addition, the present invention is characterized in that the nut is provided with a plurality of elastic support pieces for elastically supporting the threaded portion of the bolt to prevent loosening due to vibration and the like. The bolts and nuts used in the present invention may use the patent already filed by the applicant (Publication No. 10-2004-0034389), but the present invention is not necessarily limited thereto, and other bolts and nuts provided with an anti-loosening function may also be used. It's okay.

In addition, the present invention is characterized in that the iron core is provided with a protruding piece on the lower surface in order to increase the integrity of the iron core and the rubber member and the protruding piece is integrally embedded in the rubber layer.

In another aspect, the present invention is characterized in that the bolt attachment portion or nut attachment portion protrudes downward to be exposed to the surface of the rubber layer.

The shoe plate of the current steel crawler is already used in the structure shown in Patent Document 1 and Patent Document 2, but in spite of savings a lot of time and effort in mounting on the steel crawler, there are various problems described above for partial improvement We are making constant efforts.

First of all, the process of mounting the pad to the steel crawler is that the steel crawler is installed on both sides of the machine body, so that the space for tightening the rubber pad bolts is narrow when the pad is attached. Therefore, it is difficult to get the tools and hands. Also, since the rubber pads cannot be attached to the steel crawler on the ground, the whole machine must be moved to the position where the installation work can be done by moving the machine little by little.

And because 80-100 sheets of pads are usually required for a single machine, four-point bolts require a lot of time to fasten about 400 bolts.

Here, the technology of making the pad wearing work easier and less time consuming has been developed. The conventional method is to fasten the plate hook like Patent Document 1 to one end of the pad and the other end to bolt and nut. Although the time has been shortened to less than half, the round hook attached to one end of the pad by bending a hook of a wire loop type having a rounded shape of the hook has a larger bending moment than the hook of a rectangular cross section. It is advantageous.

In addition, the lifting force is also a one-loop loop, so that the strength is 1.5 times higher than the two hooks. For example, the theoretical bending moment calculation is as follows.

If the cross section is rectangular (18mm wide and 6mm long),

Cross-sectional area; 108 square mm

Section modulus; h3 / 6 i.e. (6x6x6 / 6) = 36

When cross section is round (diameter 9mm)

      Cross-sectional area; 63.6 square mm

      Section modulus; πr3 / 4 or (3.14x 4.5x4.5x4.5 / 4) = 71.5

Therefore, the circular shape is about half smaller than the square, but the calculation of the cross-sectional coefficient is about twice as large.

Silver is connected in a row, so the lifting force is 1.5 times more than when it is separated in two lines, so the strength of the circle is more than three times stronger in terms of strength, so that deformation does not occur easily.

When attaching an ordinary hook pad to a steel crawler, it is common to bend the tip of the hook that touches the first time so that the pad can be easily inserted. After wearing

It may be shaped to protrude from the surface of the shoe plate and may be deformed when hit against an external stone or hard object. However, since the wire hook, which has a circular cross section, is rounded as it is, it is not necessary to bend the tip of the hook upwards, so that it is firmly attached to the surface of the shoe plate without any gap, so it is less likely to be deformed by external impact.

Wire hooks are also easy to manufacture and cost effective.

For pads, hook-type pads are used a lot for the above reasons. Bolt-nuts are also fastened, but the hooks are not rigid enough to prevent the vertical movement of the pads. This will cause the two bolt-nuts to loosen and loosen the pads to be secured.

The reason why the bolt 3 is loosened is because the hook 2 flows, so that the elastic force and elasticity on the surface of the rubber pad 4 which completely covers the iron core 1 with the rubber member and abuts the steel shoe plate 6. Forming a rubber layer 5, but as shown in FIG. 1, the distance S1 in the vertical direction with respect to the surface of the rubber layer 5 of the hook is smaller than the thickness S2 of the shoe plate 6, and the diameter of the hook 2 is reduced. The distance S3 in the photographing direction is slightly larger than the thickness S2 of the steel shoe plate 6 (that is, S1 <S2 <S3), the rubber pad 4 is placed on the steel shoe plate 6, and the arrow is held in the direction 13. When pulled, the shoe plate 6 has a larger thickness than the vertical gap with respect to the surface of the rubber layer 5 of the hook 2, so that the front of the rubber pad 4 protrudes slightly.

Since the surface of the rubber pad 4 is a rubber member, it is forcibly pressed in the direction of the shoe plate 6 and then the spring washer 10 and the nut 7 are tightened to compress the rubber member on the contact surface of the rubber pad 4. It is in close contact and securely fastened against external shocks (see FIGS. 1 (c) and 2 (a)).

What has been described above is the characteristic structure of the present invention. That is, when the hook 2 of the rubber pad 4 is pulled over the end of the shoe plate 6 (see Fig. 1 (c)), the shoe plate 6 pressurizes and compresses the rubber layer 5, and will be attached as in a). At this time, the bolt 3 is also inserted into the bolt hole 6a of the shoe plate 6 and protrudes from the shoe plate 6.

Here, the spring washer 10 is inserted into the protruding bolt 3, and the fastening teeth 10a of the spring washer 10 are fastened to the threaded portions of the bolt 3 so that the spring washer 10 is in the attachable state. Since the nut 7 can be fastened and the spring washer 10 and the nut 7 can be fixed by one hand operation, the work can be easily and quickly performed.

In addition, the hook 2 pushed in by force does not move as well, and since both surfaces contacting the whole become a rigid joint, the vibration of the hook 2 does not occur.

Therefore, there is an effect that the fastening of the bolt 3 is not loosened.

Since the surface rubber layer 5 of the rubber pad 4 is pressed and adhered to the shoe plate 6, there is no gap between both sides, and mud, It is possible to prevent the phenomenon that the dust penetrates to corrode the iron plate or shorten the life of the rubber member.

In order to fit the hook 2 having a small vertical gap with respect to the surface of the rubber layer 5 to the thick shoe plate 6, the end of the rubber member coated on the back surface of the rubber pad 4 is gently and obliquely mapped. Solved simply.

In addition, although a pin is installed on a hook side of a conventional pad and worn on a shoe plate, the method of fastening with two hooks and two pins and two bolt-nuts is similar to the present invention, but the form of basic contact is different.

In addition, it is fixed by tightening the opposite bolt-nut while pressing the pin over the hook, but unlike the double-sided contact type of the present invention, a gap is generated between the contacting surface of the pad and the shoe plate, which causes vibration, and thus a gap between the two sides of the contact. The present invention, which does not occur at all, is greatly different from eliminating the cause of vibration from the initial stage of wearing.

Although the above invention has mainly described a pad of a hook type, the structure of the iron core can be used for pads other than the hook type.

The best mode for carrying out the present invention is a hook type rubber pad 4 for a steel crawler which is easy to install and which is securely fixed after mounting, so as to maintain the same state for a long time, and a non-hook type rubber pad 4 Can also be applied.

The present invention has the above characteristics and coats the vulcanized rubber member on the entire iron core 1 in order to exhibit the effect.

In addition, a detachable hook 2 is provided at one end of the iron core 1, and the fixing bolt 3 is protruded at the other end. In addition, the rubber layer 5 is covered with the rubber plate 5 so as to be smaller than the thickness of the shoe plate 6 of the steel crawler which wears it so as to have a gap in the vertical direction with respect to the surface of the rubber layer 5 of the hook 2 to be inclined to the shoe plate 6. After pulling, the rubber layer 5 coated on the iron core 1 presses the surface of the shoe plate 6 and adheres at the same time.

Since the iron core 1 is provided in the rubber layer 5 by protruding pieces 1a in the downward direction, the steel core 1 maintains elasticity and elastically contacts the shoe plate 6 even when the rubber layer 5 is aged.

In addition, the fixing bolt (3) to prevent the loosening of the nut (7) can prevent the loosening in use.

Referring to FIGS. 1 and 2 as a specific embodiment, the proximal end of the hook 2 is welded and fixed to one end of the iron core 1, and the bolt 3 is provided on the opposite side of the iron core 1 to the front end thereof. Protrude the side.

The iron core 1, the proximal end of the hook 2 and the head of the bolt 3 form a rubber pad 4 coated with a vulcanized rubber member, and at the same time a rubber layer on the lower surface of the iron core 1 5) forms an inclined portion 5b inclined to the hook 2 side and inserts one end of the shoe plate 6 into the lower surface thereof so that the bolt 3 and the nut 7 at the other end thereof. By fastening the pressure and the lower surface (Fig. 1) and the shoe plate 6 of the rubber layer 5 is fixed integrally.

In the above, since the L portion 2a of the hook 2 is opposed to the inclined portion 5b of the rubber layer 5, one end of the shoe plate 6 is inserted (Fig. 1), and the shoe plate 6 ), The rubber layer 5 and the shoe plate 6 can be easily press-contacted by fastening the bolt 3, the spring washer 10, and the nut 7.

The bolt 3 and the nut 7 are conventional, and the spring washer 10 uses the fastening tooth 10a, but another embodiment may be described as shown in FIG.

In Figs. 2 (b) and 2 (c), Fig. 2 (b) shows a plan view and Fig. 2 (c) is a sectional view, and a fastening tooth 10a is provided on the inner circumferential wall of the link-shaped spring washer 10. Thus, the inner diameter of the fastening tooth 10a is made smaller than the outer diameter of the bolt 3.

3, the head 3a of the bolt 3 is fixed to the iron core 1 and embedded therein, and the elastic fastening pieces 8a, 8b, 8c fixed to the inner wall of the cap nut 7a. Since the tip is fastened with the threaded portion of the bolt 3, the cap nut 7a is worn in the same direction as the arrow 9, and the bolt 3 and the cap nut 7a are tightly tightened in the opposite direction to the arrow 12 without any gap. There is no fear of falling out.

As a result, the cap nut 7a can be easily pushed in as shown in the arrow 9 at the time of the arrow. 3 also shows a spacer 11.

4 and 5, which is another embodiment of the present invention, the proximal end of the hook 2 is welded to one end of the iron core 1, and the bolt 3 is opposite to the iron core 1. Fix the head to protrude the tip.

The iron core 1 is provided with a protruding piece 1a cut in three places at various positions and bent downward, and embedded in the rubber layer 5 under the iron core 1. Reference numeral 4 in the drawings denotes a rubber pad 4, and 5a denotes an upper rubber layer 5 of the iron core 1.

One side of the iron core 1 is provided with a protrusion 1b to fix the head of the bolt 3, the protrusion 1b is exposed to the lower surface of the rubber layer (5). The lower rubber layer 5c and the upper rubber layer 5a are connected through the cutting hole 1c of the protruding piece 1a.

Therefore, when the nut 7 is fastened to the place where the shoe plate 6 is fixed, the inner surface of the shoe plate 6 and the lower surface of the protrusion 1b are pressed and contacted.

Although the shape of the protruding piece 1a includes a section, a curved piece, and the like, there is no limitation on the shape.

In this embodiment, since the L portion 2a of the hook 2 is opposed to the inclined portion 5b of the rubber layer 5, one end of the shoe plate 6 is inserted (Fig. 5 (c)). When the shoe plate 6 is fastened with the bolt 3, the spring washer 10, and the nut 7, the rubber layer 5 and the shoe plate 6 can be easily pressed against each other.

In the above, the nut 7 uses the same thing as that shown in FIG.

In the above embodiment, since the protruding piece 1a has elasticity, it elastically deforms against the elastic deformation (when fastened and fixed) of the rubber layer 5, thereby promoting elasticity of the rubber layer 5 and at the same time providing a rubber layer ( Even when the decrease in elasticity due to aging of 5) appears, the necessary elasticity can be maintained, and the adhesion between the rubber layer 5 and the shoe plate 6 can be maintained.

Technical effects according to the present invention of the above configuration is as follows.

First, since the dimensions of the present invention are determined in the order of the interval in the vertical direction with respect to the surface of the rubber layer of the hook, the thickness of the shoe plate of the steel crawler, and the interval of the inclined direction in which the hook is inserted, it is easily mounted with one hand. The contact surface of the shoe plate and the rubber pad can be compressed and adhered to withstand a large force, while also preventing the mixing of mud and other foreign substances from the outside, thereby increasing durability and allowing long-term use.

Second, one end of the iron core or steel protective plate has a hook of the wire loop shape of a circular cross section, so the resistance to external force is large, so that it can be safely maintained.

Thirdly, the invention described in claims 5 and 6 allows the steel core of the rubber pad and the iron plate of the shoe plate to be in direct contact with each other to make a strong fastening, and the protrusion to be positioned at the hexagonal head of the bolt is diagonal to the stool distance of the hexagonal head. If the distance is barely bent, the head of the bolt does not rotate, and it is automatically prevented from being released even if the bolt is not fixed.Other parts beside the bend form a rubber layer, so that the surface is easily adhered to the rough shoe plate. The gap can be effectively filled to prevent the intrusion of water, mud, dust, etc., and when a plurality of protrusions are formed by bending three sides of the iron core and embedded in the rubber layer, the protrusions act as springs. Thus, even when the rubber layer is aged, it is still provided with elasticity and durability can be maintained.

Claims (6)

A rubber pad mounted to an iron crawler, wherein the rubber molded rubber member is an iron core; A rubber layer is formed to cover the whole, and a detachable hook having a wire loop shape having a circular cross section at one end of the iron core is provided, and a fixing bolt is protruded at the other end of the iron core. The gap in the vertical direction with respect to the surface of the rubber layer is formed to be narrower than the thickness of the shoe plate of the steel crawler so that the hook is inclined to the shoe plate, and the rubber layer coated on the iron core is pressed while pulling the rubber layer. A cover type rubber pad for a steel crawler, wherein the surface is pressurized and brought into close contact with each other, and the nut is fastened to the bolt. A rubber pad mounted to an iron crawler, wherein the rubber molded rubber member is an iron core; A rubber layer is formed to cover the whole, and a detachable hook having a wire loop shape having a circular cross section at one end of the iron core is provided, and a fixing nut is embedded at the other end of the iron core. The gap in the vertical direction with respect to the surface of the rubber layer is formed to be narrower than the thickness of the shoe plate of the steel crawler so that the hook is inclined to the shoe plate, and the rubber layer coated on the iron core is pressed while pulling the rubber layer. A pressure-sensitive rubber pad for a steel crawler, which is pressed against the surface thereof and fixed by fastening a bolt to the nut. delete The method of claim 1 or 2, wherein the nut, And a plurality of elastic support pieces for elastically supporting the threaded portions of the bolts. The method of claim 1 or 2, wherein the iron core, A protruding piece is provided on a lower surface, and the protruding piece is integrally embedded in the rubber layer. The method of claim 5, wherein the iron core, The coated rubber pad for a steel crawler, wherein the bolt attachment part or the nut attachment part protrudes downward to be exposed to the surface of the rubber layer.

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