JPH0558918U - Bolt fastening structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a bolt fastening structure capable of suppressing the shearing force applied to a bolt as much as possible. [Structure] In a hydraulic excavator, for example, a link 8 forming a first fastening body and a shoe 9 forming a second fastening body
A frictional force imparting means, such as a minute metal piece 12, for restricting relative sliding between the link 8 and the shoe 9 is provided between and. [Effect] It is possible to prevent breakage of the bolt that fastens the link 8 and the shoe 9.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to at least two structures provided in various machines such as hydraulic excavators, that is, a bolt fastening structure for integrally fastening a first fastening body and a second fastening body with bolts.

[0002]

[Prior Art]

 FIG. 3 is an explanatory view showing the external appearance of a hydraulic excavator cited as an example of a machine having a bolt fastening structure, and FIG. 4 is an enlarged view of a portion B showing the links and shoes constituting the crawler belt provided in the hydraulic excavator shown in FIG. It is a figure.

The hydraulic excavator shown in FIG. 3 includes a traveling body 1, a revolving structure 2 that is provided on the traveling structure 1 and forms a main body, and a boom 4 that is rotatably mounted on the revolving structure 2. An arm 5 rotatably provided on the boom 4 and a bucket 6 rotatably provided on the arm 5 for performing excavation work and the like are included. The running body 1 also includes an endless crawler belt 7, and as shown in FIG. 4, a first fastening body or link 8 and a second fastening body or shoe forming the crawler belt 7. 9 is integrally fastened with a bolt 10.

[0004]

[Problems to be solved by the device]

 The hydraulic excavator shown in FIG. 3 described above travels when the crawler belt 7 moves, and during this traveling operation, due to the frictional force between the shoe 9 and the ground contact surface and the propulsive force for traveling, , A force for causing relative sliding between the link 8 and the shoe 9 may act. For example, in FIG. 4, assuming that the link 8 is in a stopped state, a force for moving the shoe 9 in the direction of arrow 11 is given, and relative sliding is performed between the link 8 and the shoe 9. If such relative sliding is performed, an excessive shearing force may act on the bolt 10 that fastens the link 8 and the shoe 9, and the bolt 10 may be broken.

The present invention has been made in view of the above-mentioned actual situation in the prior art, and an object thereof is to provide a bolt fastening structure capable of suppressing the shearing force applied to the bolt as much as possible.

[0006]

[Means for Solving the Problems]

 In order to achieve this object, the present invention is a bolt fastening in which a first fastening body and a second fastening body arranged to face the first fastening body are integrally fastened by a bolt. In the structure, a frictional force imparting means for restricting relative sliding between the first fastening body and the second fastening body is provided between the first fastening body and the second fastening body. There is.

[0007]

[Action]

 Since the present invention is configured as described above, when relative sliding is about to occur between the first fastening body and the second fastening body, the relative sliding movement is caused by the frictional force imparting means. It is regulated, and therefore, the shear force applied to the bolt is suppressed to be small.

[0008]

【Example】

 An embodiment of the bolt fastening structure of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged view of a main part showing an embodiment of the present invention, and FIG. 2 is an enlarged view of part A of FIG. The embodiments shown in FIGS. 1 and 2 show a bolt fastening structure of a crawler belt provided in the hydraulic excavator shown in FIG. 3, for example.

In FIGS. 1 and 2, 8 is a first fastening body or link, 9 is a second fastening body, that is, a shoe, and 10 is a bolt for fastening these links 8 and shoes 9 together. These links 8, shoes 9, and bolts 10 form the track of a hydraulic excavator.

In this embodiment, a frictional force imparting means for restricting relative sliding between the link 8 and the shoe 9, for example, a minute metal piece 12, is provided between the link 8 and the shoe 9. The fine metal piece 12 is formed by applying a solution in which a fine metal piece is mixed in a predetermined solvent to the surface of the link 8 and the surface of the shoe 9 before fastening with the bolt 10. .

In the embodiment configured as described above, when the relative sliding between the link 8 and the shoe 9 is about to occur as described above due to the movement of the crawler belt during traveling, the frictional force generated by the minute metal piece 12 causes a frictional force. The relative sliding is regulated, which prevents the bolt 10 from being broken because an excessive shearing force does not act on the bolt 10. Therefore, the durability of the track can be significantly improved.

In the above embodiment, the minute metal piece is used as the frictional force applying means, but if the frictional force is forcibly applied, another inclusion may be provided instead of the minute metal piece. You may.

[0013]

[Effect of the device]

 Since the bolt fastening structure of the present invention is configured as described above, relative sliding between the first fastening body and the second fastening body can be regulated, and thus the first fastening body and the second fastening body can be controlled. Excessive shearing force does not act on the bolt that fastens the second fastening body, and the bolt can be prevented from breaking.

[Brief description of drawings]

FIG. 1 is an enlarged view of essential parts showing an embodiment of a bolt fastening structure of the present invention.

FIG. 2 is an enlarged view of part A in FIG.

FIG. 3 is a diagram showing an appearance of a hydraulic excavator given as an example of a machine to which a bolt fastening structure is applied.

FIG. 4 is a view showing a conventional bolt fastening structure of a link and a shoe forming a crawler belt of the hydraulic excavator shown in FIG.

[Explanation of symbols]

 8 link (first fastening body) 9 shoe (second fastening body) 10 bolt 12 small metal piece (friction force applying means)

Claims (3)

[Scope of utility model registration request] 1. A bolt fastening structure for integrally fastening a first fastening body and a second fastening body, which is arranged so as to face the first fastening body, by means of bolts.
And a second fastening body between the first fastening body and the second fastening body are provided with frictional force applying means for restricting relative sliding between the first fastening body and the second fastening body. .. 2. The bolt fastening structure according to claim 1, wherein the frictional force applying means is a small metal piece. 3. The bolt fastening according to claim 1, wherein the first fastening body is a link forming a crawler belt of the hydraulic excavator, and the second fastening body is a shoe attached to the link. Construction.