JP2563771Y2 - Construction machine hose clamp structure - Google Patents

Description

[Detailed description of the invention]

[0001]

In the present invention, a boom is attached to a swing bracket that can swing freely from side to side so that it can swing up and down, and a hydraulic hose extending over the body and the boom is held by a hose clamp attached to the swing bracket in a vertically penetrating state. To form a hose clamp, a pair of rubber holding members for holding the hydraulic hose are attached to a metal holder fixed to a swing bracket, and a vertical movement of the holding member is prevented between the holder and the holding member in contact therewith. The present invention relates to a hose clamp structure of a construction machine having a joint portion.

[0002]

2. Description of the Related Art Conventionally, in the above hose clamp, as shown in FIG. 5, a pair of holding members 12, 13 and a metal retainer 1 are attached to a round bar 11 protruding from both right and left ends of a holder 10.
4 and the holding member 1 is fastened with the screw 15 attached to the round bar 11.
A pair of upper and lower tongue pieces 17 provided at the left and right centers of the holder 10 are respectively brought into contact with the upper and lower surfaces of one of the holding members 12 so that the tongue piece 17 and the holding member 12 are fixed. The vertical movement of the holding member 12 caused by the pressurized oil in the hose 8 is prevented by the action of the engaging portion.

[0003]

However, when the boom is raised upright, the hose is bent toward the holder near the upper surface of the holding member, and the hose is strongly pressed against the holding member. Stress that expands into
Therefore, if the boom is repeatedly raised, the hose and the holding member are easily damaged by fatigue, and there is room for improvement in terms of durability. An object of the present invention is to improve the durability of the hydraulic hose and the hose clamp with respect to the working arm by modifying the hose clamp.

[0004]

The feature of the present invention is that a boom is attached to a swing bracket which can swing right and left so as to be able to swing up and down, and a hydraulic hose extending over the body and the boom is vertically attached to a hose clamp attached to the swing bracket. In order to form a hose clamp by holding it in a penetrating state, a pair of rubber holding members for holding the hydraulic hose are mounted on a metal holder fixed to the swing bracket, and the holding member is vertically moved between the holder and the holding member in contact therewith. In a construction machine having an engaging portion for preventing movement, the engaging portion is disposed only below the upper surface of the holding member.

[0005]

In other words, if the engaging portion for preventing the vertical movement of the holding member is arranged only below the upper surface of the holding member, the hose is bent toward the holder near the upper surface of the holding member due to the rising of the boom, and the hose is bent. When pressed, the upper part of the rubber holding member can freely expand upward, so that the stress of the hose and the holding member can be suppressed small by the escape of the holding member, and the fatigue damage of the hose and the holding member due to repeated boom standing up can be prevented. It can be suppressed sufficiently.

[0006]

As a result, fatigue damage of the hydraulic hose and the hose clamp to the working arm can be sufficiently prevented.
It has become possible to provide a construction machine with even better durability.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a swivel 3 is provided on an upper part of a traveling vehicle body provided with a tozer 1 and a crawler type traveling device 2 so as to be freely rotatable around a vertical axis.
The swing bracket 4a is provided on the swivel base 3 so that the swing bracket 4a can freely swing left and right. A backhoe device 4 including a bucket 4d attached to the arm 4c so as to be freely rotatable by an arm 4c and a hydraulic cylinder 7d is provided, and a driving unit 5, an operation unit 6, and the like are provided on the swivel 3 to constitute a backhoe with a dozer. . As shown in FIGS. 2 to 4, six hydraulic hoses 8 for driving the backhoe device 4 are installed over the swivel base 3 and the boom 4b, and all the hoses 8 are vertically passed through a hose clamp 9 attached to a swing bracket 4a. It is kept in a state.
To form the hose clamp 9, a metal holder 10 is fixed to the swing bracket 4 a, and a pair of rubber holding members 12, 13 for holding the hose 8 on round bars 11 protruding from both right and left ends of the holder 10. The holding members 12 and 13 are fitted with screws 15 attached to the round bar 11.
A hole 16a formed in the center of the holder 10 in the left and right direction to form an engaging portion 16 between the holder 10 and the holding member 12 which is in contact therewith to prevent the vertical movement of the holding member 12. A projection 16b integrally formed below the upper surface at the left and right center of the holding member 12 is fitted into the holding member 12, and the holding member 12 caused by the pressure oil in the hose 8 by the action of the engaging portion 16.
It is configured to prevent the vertical movement. The holding member 12 on the holder 10 side is formed with a chamfered portion 12a located at the upper end side of each of the fitting grooves of the hose 8, so as to ease the pressing of the hose 8 against the holding member 12 when the boom 4b rises. I have.

[Alternative Embodiment] The present invention can be applied to construction machines other than the backhoe, and the swing bracket 4a may be attached to an airframe other than the swivel base 3, and the number of the hoses 8 to be held by the hose clamps 9 is appropriate. Can be selected. In forming the engaging portion 16, the specific structure can be appropriately changed. For example, a projection provided on the holder 10 is fitted into a hole of the holding member 12, or a tongue provided on the holder 10 is attached to the lower surface of the holding member 12. Contact can be made.
Further, a plurality of the engaging portions 16 may be arranged side by side on the left and right. In short, the engaging portions 16 may be arranged only below the upper surface of the holding member 12 which is in contact with the holder 10.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an overall side view of a backhoe.

FIG. 2 is a partially cutaway side view of a hose clamp part.

FIG. 3 is a partially cutaway plan view of a hose clamp part.

FIG. 4 is an exploded perspective view of a hose clamp.

FIG. 5 is an exploded perspective view of a conventional hose clamp.

[Explanation of symbols]

 4a Swing bracket 4b Boom 8 Hydraulic hose 9 Hose clamp 10 Holder 12 Clamping member 13 Clamping member 16 Engagement part

Claims (1)

(57) [Scope of request for utility model registration] A swing bracket (4) capable of swinging right and left.
A boom (4b) is attached to a) so that it can swing up and down, and a hydraulic hose (8) extending over the body and the boom (4b) is held in a vertically penetrated state by a hose clamp (9) attached to the swing bracket (4a). In order to form the hose clamp (9), a pair of rubber holding members (12) and (13) for holding the hydraulic hose (8) are fixed to the swing bracket (4a). )
And an engaging portion (16) for preventing vertical movement of the holding member (12) is formed between the holder (10) and the holding member (12) in contact with the holder (10). A hose clamp structure for a construction machine, wherein (16) is disposed only below the upper surface of the holding member (12).