JPH0614527U - Nut with cap - Google Patents

Abstract

(57) [Abstract] [Purpose] When the arm of the conventional ultra-long attachment mounted on the hydraulic excavator is operated to rotate, the hydraulic hose arranged near the base end of the arm swings, and the swing angle detection device. May come in contact with bolts and hexagon nuts of the link mechanism of. The bolt and hexagon nut got into the gap of the spring guard of the hydraulic hose, and the hydraulic hose, spring guard, bolt, and hexagon nut were damaged. The present invention provides a cap nut that can solve the above problems. [Configuration] According to the present invention, in a machine device such as a construction machine assembled by using a nut member, a trapezoidal cap member having a tapered top and an area of a base surface larger than the outer shape of the nut is provided on the end face side of the nut. It was formed integrally.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a nut member used in a mechanical device such as a construction machine.

[0002]

[Prior art]

 FIG. 5 is a side view of the hydraulic excavator for disassembling the structure to which the crusher 1 is attached. In the figure, 2 is a super long attachment mounted on the front part of the hydraulic excavator, 3 is a long boom of the super long attachment 2, 4 is an inter boom, 5 is an arm, 6, 7, 8, 9 are hydraulic cylinders, respectively. is there. FIG. 6 is a detailed view of part A of FIG. In the figure, 10 is a swing angle detection device of the arm 5, 11 is a housing body incorporating an angle sensor (not shown) in the swing angle detection device 10, 12 is a rotation transmission shaft of the angle sensor, and 13 is a link. Mechanism, 14 is a lever of a link mechanism, 15 is an adjust rod, 16 and 17 are joints, 18 is a connecting pin that connects the tip of the interboom 4 and the base of the arm 5, 19 is a hydraulic hose, Reference numeral 20 is a spring guard wound to protect the outer peripheral portion of the hydraulic hose 19. FIG. 7 is a plan view of an essential part viewed from B of FIG. In the figure, 21 is a bolt provided on the joint portion 16 of the link mechanism 13, and 22 is a hexagon nut.

[0003]

[Problems to be solved by the device]

 In the conventional ultra long attachment 2 equipped with a hydraulic excavator, the link mechanism 13 of the swing angle detection device 10 and the bent portion B of the hydraulic hose 19 (shown in FIGS. 6 and 7) are arranged in close proximity. Therefore, when the arm 5 of the ultra-long attachment 2 is rotated, the hydraulic hose 19 may swing and come into contact with the bolt 21 and the hexagon nut 22 of the link mechanism 13. The bolt 21 and the hexagon nut 22 entered into the space of the spring guard 20 of the hydraulic hose 19 and the hydraulic hose 19, the spring guard 20, the bolt 21, and the hexagon nut 22 were damaged. An object of the present invention is to provide a cap nut that can solve the above problems.

[0004]

[Means for Solving the Problems]

 In the nut with cap of the present invention, a trapezoidal cap member having a tapered top and an area of the base surface larger than the outer shape of the nut is integrally formed on the end surface side of the nut.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of an essential part of an ultra long attachment 2'having a cap nut 23 of the present invention. In the figure, the same reference numerals are given to those using the same constituent elements as those in the prior art. Reference numeral 10 'is a swing angle detection device of the arm 5, and 13' is a link mechanism of the swing angle detection device 10 '. FIG. 2 is a detailed view of the cap nut 23 in the C portion of FIG. In the figure, 24 is a cap member provided on the cap nut 23, 25 is the top of the cap member 24, 26 is a base surface portion, 27 is a nut, S1 is the area of the base surface portion 26, and S2 is the surface area of the end surface of the nut 27. is there. FIG. 3 is a view seen from D in FIG. In the drawing, 28 is a screw hole of the nut 27.

Next, the structure of the cap nut 23 of the present invention will be described with reference to FIGS. 2 and 3. In the cap nut 23 of the present invention, a trapezoidal cap member 24 having a tapered top portion 25 and a surface area S1 of the base surface portion 26 larger than an end surface area S2 of the nut 27 is integrally provided on the end surface side of the nut 27. In the cap nut 23 shown in FIG. 2, the cap member 24 and the nut 27 are formed in a divided shape, and both of them are welded (welded portion is indicated by a reference numeral B) to form an integrated shape. However, in the nut with cap of the present invention, the cap member and the nut may not necessarily be divided into pieces, but the whole shape may be machined from a single material to be integrally formed.

Next, the operation of the cap nut 23 of the present invention will be described with reference to FIG. When the arm 5 of the ultra-long attachment 2'is pivotally operated and the hydraulic hose 19 swings and comes into contact with the cap nut 23, the spring guard 20 of the hydraulic hose 19 causes the spring guard 20 of the cap hut 23 to reach the top 25 or It abuts the tapered surface c (shown in FIG. 2). Since the size of the base portion 26 of the cap member 24 is larger than the gap between the nut 27 and the spring guard 20, the cap nut 23 cannot fit in the gap between the spring guard 20. Further, the tip of the bolt of the joint portion 16 in FIG. 1 (not shown in FIG. 1, but the same as the bolt 21 shown in FIG. 7) is inside the cap member 24, so that the bolt is damaged. There is no. Therefore, by tightening the cap nut 23 of the present invention onto the bolt (21), contact damage of the hydraulic hose 19, the spring guard 20, and the bolt (21) can be prevented.

FIG. 4 is a sectional view of a nut 29 with a cap according to another embodiment of the present invention. In this nut 29 with a cap, the cap member 30 is formed by press drawing a plate material and is fixed integrally to the nut 27 '. The operation and function of the cap nut 29 are similar to those of the cap nut 23.

[0009]

[Effect of device]

 When the arm of the conventional ultra-long attachment mounted on the hydraulic excavator is rotationally operated, the hydraulic hose arranged near the base end of the arm swings, causing the bolt and hexagon nut of the link mechanism of the swing angle detection device to swing. May come into contact with. The bolt and hexagon nut got into the space of the spring guard of the hydraulic hose, causing damage to the hydraulic hose, spring guard, bolt, and hexagon nut. However, in the cap nut of the present invention, a trapezoidal cap member having a tapered top and an area of the base surface larger than the outer shape of the nut is integrally provided on the end face side of the nut for mounting the link mechanism of the swing angle detecting device. Formed. As a result, when the arm of the ultra-long attachment is rotated, when the hydraulic hose swings and comes into contact with the cap nut, the spring hose spring guard comes into contact with the top or tapered surface of the cap nut. Since the size of the base surface of the cap member is larger than the distance between the nut and the spring guard, the cap nut does not fit into the spring guard. Also, since the bolt tip of the joint of the link mechanism is inside the cap member, the bolt is not damaged. Therefore, by tightening the cap nut of the present invention to the above bolt, contact damage accidents of the hydraulic hose, spring guard, bolt, etc. can be prevented and the maintainability thereof can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of an ultra-long attachment provided with a cap nut of the present invention.

FIG. 2 is a detailed view of a cap nut in a C portion of FIG.

FIG. 3 is a view seen from D in FIG.

FIG. 4 is a sectional view of a cap nut according to another embodiment of the present invention.

FIG. 5 is a side view of a hydraulic excavator for dismantling a structure.

6 is a detailed view of a portion A in FIG.

FIG. 7 is a plan view of a main part of the conventional technique viewed from B of FIG. 6;

[Explanation of symbols]

 2,2 'Super long attachment 5 Arm 10, 10' Swing angle detection device 13, 13 'Link mechanism 16, 17 Joint part 19 Hydraulic hose 20 Spring guard 21 Bolt 23, 29 Cap nut 24, 30 Cap member 25 Top part 26 Base part 27,27 'Nut

Claims (1)

[Scope of utility model registration request] 1. In a machine device such as a construction machine assembled by using a nut member, a trapezoidal cap member having a tapered top and an area of a base surface larger than the outer shape of the nut is integrally formed on the end face side of the nut. A cap nut, which is formed by being provided on the.