JP2002052345A - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of parts of a crusher to a minimum to realize the simplification of structure, downsizing, weight reduction, and cost reduction of the crusher. SOLUTION: An arm carrier 3, an open-close cylinder 9, and a swivel joint 24 are arranged on a cylinder axis line; the rod cover 22 of the open-close cylinder is attached integrally to the arm carrier 3, and so is the head cover 28 of the open-close cylinder to the inside member 25 of the swivel joint 24; a flange 31, which is linked to the crusher installation section of an operating machine, is attached integrally to an outer member 26; and a speed-increasing valve V, which elongate the open-close cylinder 9 at a high speed under no load, is incorporated into the swivel joint 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher for crushing a concrete block or the like between a pair of arms by cutting a reinforcing bar or the like by a blade provided on an arm body, or crushing a surface or grasping an object. (Including machines transported by).

[0002]

2. Description of the Related Art Conventionally, this type of crusher is attached to the tip of a working arm as an attachment for a working machine such as a hydraulic shovel.

This crusher includes an openable and closable arm body composed of a pair of arms, an arm support to which the arm body is attached, an open / close cylinder for opening and closing the arm body, and an open / close cylinder and a working machine side. It is composed of a swivel joint that connects the hydraulic source and the tank.

[0004] Here, an open / close cylinder provided perpendicular to the opening / closing direction of the arm body and arranged side by side with the arm support in the cylinder axis direction is disclosed in Japanese Patent Laid-Open No. 4-347269. It is known.

[0005]

However, in the above-mentioned known crusher, the arm support and the opening / closing cylinder are formed as separate members and are independent of each other, and are bolted to each other by flanges.

[0006] Similarly, the relationship between the opening / closing cylinder and the swivel joint is similarly configured as separate and independent components, and the flanges are connected to each other.

As a result, the number of parts is unnecessarily large, the structure is complicated, and the whole crusher is increased in size, weight, and cost.

Accordingly, the present invention is to provide a crusher capable of simplifying the structure by minimizing the number of parts and realizing a reduction in size, weight and cost.

[0009]

According to a first aspect of the present invention, a pair of arms for sandwiching an object to be crushed is rotatably attached to an arm support to form an openable and closable arm. In a crusher configured to be opened and closed by an opening and closing cylinder provided orthogonal to the opening and closing direction of the body,
The open / close cylinder and the arm support are arranged on a cylinder axis, and the arm support is provided with a rod cover for closing a rod-side opening of a cylinder tube in the open / close cylinder.

According to a second aspect of the present invention, in the crusher according to the first aspect, a pressurized fluid is supplied to the open / close cylinder on a side opposite to the arm support on the axis of the open / close cylinder. A swivel joint to be discharged is arranged, and one of the inner member and the outer member constituting the swivel joint is provided with a head cover for closing a head-side opening of a cylinder tube in the opening / closing cylinder.

According to a third aspect of the present invention, there is provided an opening / closing cylinder which rotatably mounts a pair of arms for holding the object to be crushed to an arm support, and includes an opening / closing cylinder for driving the opening / closing of the arm. A swivel joint that supplies and discharges a pressure fluid to and from the open / close cylinder, wherein one of the inner member and the outer member of the swivel joint is integrally provided with a flange connected to a crusher mounting portion of a working machine. It is provided in.

According to a fourth aspect of the present invention, there is provided an opening / closing cylinder which rotatably attaches a pair of arms for sandwiching the object to be crushed to an arm support, and comprises an opening / closing cylinder for opening and closing the arm. In a crusher having a swivel joint for supplying and discharging a pressurized fluid to and from the open / close cylinder, a speed increasing valve for increasing the operation of the open / close cylinder is incorporated in an inner member of the swivel joint.

According to the first and second aspects of the present invention, the arm support is provided with the rod cover of the open / close cylinder integrally.
In other words, the open / close cylinder and the arm support that are adjacent to each other in the cylinder axis direction are taken as an integral body, and they are configured to share one part, so that the structure is simplified, the number of parts is reduced, and the entire crusher is downsized. The weight can be reduced and the cost can be reduced.

According to the second aspect of the present invention, in addition, since the head cover of the open / close cylinder is integrally provided on one of the inner member and the outer member of the swivel joint, the size and weight of the crusher can be further reduced, and the cost can be reduced. Can be.

On the other hand, according to the third aspect of the present invention, one of the swivel joints is connected to the crusher mounting portion of the working machine, regardless of whether the arm support, the opening / closing cylinder, and the swivel joint are aligned on the cylinder axis. Since the flanges are provided, and the speed increasing valve is incorporated in the swivel joint according to the configuration of claim 4, downsizing, weight reduction and cost reduction can be realized respectively.

In particular, according to the configuration of the fourth aspect, the valve body and piping can be omitted as compared with a case where the speed increasing valve is separately provided independently of the swivel joint, so that significant weight reduction and cost reduction can be achieved. Since the speed increasing valve is not exposed to the outside, the failure of the valve is reduced, and the durability can be improved.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, a pair of arms 1 and 2 sandwiching the object to be crushed
An arm body 6 which is rotatably mounted around and can be freely opened and closed.
The arm body 6 is configured to be opened and closed by an opening / closing cylinder (hydraulic cylinder) 9 via links 7 and 8.

The arms 1 and 2 are provided with opposing teeth 10 and 11 for crushing. Cutting blades 12 and 13 for cutting a reinforcing bar or the like at the base of the opening and closing are provided with scissor blades. In the same way, the blade rest is displaced back and forth (see Fig. 2).
It is provided via 12a and 13a.

Note that, as shown in FIG.
The guide plate 14 is provided in parallel with the left blade base 12a, and the right blade base 13a is sandwiched between the guide plate 14 and the left blade base 12a, thereby preventing the cutting blades 12 and 13 from being disengaged from each other. It is supposed to be.

The links 7 and 8 have one ends attached to the upper portions of the arms 1 and 2 by arm attaching pins 15 and 16, respectively, and the other ends are connected by link connecting pins 17.

The link connecting pin 17 is connected to the opening / closing cylinder 9.
Of the opening / closing cylinder 9 is applied to the arms 1 and 2 from the links 7 and 8 so that the arm body 6
Opens when the cylinder contracts and closes when the cylinder extends.

The opening / closing cylinder 9 includes a cylinder tube 18
, A piston 19, and a rod 20. The arm support 3 and the rod support 20 are arranged above the arm support so as to be orthogonal to the opening and closing direction of the arm body 6 and the rod 20 face downward. I have.

The opening / closing cylinder 9 is provided with a lower flange 21 on the outer periphery of the lower end of the cylinder tube 18.

On the other hand, a rod cover 22 also serving as a flange is provided at the upper end of the arm support 3, and the rod cover 22 is attached to the lower flange 21 of the cylinder tube 18 while closing the rod-side opening of the cylinder tube 18. They are connected by a plurality of bolts 23.

Above the opening / closing cylinder 9, a swivel joint 24 is provided side by side on the cylinder axis.
The opening / closing cylinder 9 and external hydraulic piping (pump side and tank side) are connected via the swivel joint 24.

As shown in FIG. 3, the swivel joint 24 includes an inner member 25 and an outer member 26 formed of bearings 27, 27.
Are connected so as to be relatively rotatable around the center line of the opening / closing cylinder 9.

A lower end of the inner member 25 of the swivel joint 24 is integrally provided with a head cover 28 also serving as a lower flange, and the head cover 28 closes the head-side opening of the opening / closing cylinder 9 so that the cylinder tube 18 is closed. Upper flange 2 provided on the outer periphery of the upper end
9 are connected by a plurality of bolts 30.

As described above, the rod cover 17, which is a conventional cylinder part, is attached to the arm support 3 and the head cover 2.
Since the swivel joints 8 are provided as both flange and parts, the cylinder structure can be simplified, the number of parts can be reduced, and the entire crusher can be reduced in size and weight, and the cost can be reduced.

On the other hand, an upper flange 31 is integrally provided on the outer periphery of the upper end of the outer member 26 of the swivel joint 24, and the upper flange 31 is connected to a flange of a crusher mounting portion 33 provided at the tip of a working arm 32 of the working machine. 34 are connected to each other by a plurality of bolts 35 and nuts 36.

As described above, since the swivel joint 24 is further provided with the flange 31 for the working machine, the number of parts can be further reduced as compared with the case where the same flange 31 is provided separately from the swivel joint 24.

As shown in FIGS. 4 and 5, the inner member 25 of the swivel joint 24 has first and second input / output ports 37 for supplying and discharging pressure oil to and from the open / close cylinder 9.
38 and main flow paths 39 and 40 are provided.

The inner member 25 has a central portion
A spool 41 having an oil groove is provided so as to be capable of performing a stroke operation, and pilot chambers 42 and 43 and springs 44 and 45 are provided on both sides thereof.
Pilot ports 46 and 47 for introducing cylinder pressure as pilot pressure are provided at 43, and these constitute a speed-up valve V.

The speed-increasing valve V has a low-pressure high-speed extension position a at the center and a high-pressure low-speed extension position b and a contraction position c on both sides, as shown in FIG.

FIGS. 4 and 5 show that the speed increasing valve V is in the low pressure / high speed extension position a.
In this state, the oil discharged from the cylinder rod side (compression side) oil chamber merges with the pump oil and flows back into the head side (extension side) oil chamber, whereby the cylinder 9 is operated at high speed. It extends and the arm body 6 of FIG. 1 closes quickly.

When the pressure on the cylinder head side is increased (at the time of load), the spool 41 operates in a stroke to switch to the high-pressure low-speed position b, and the oil on the cylinder rod side returns to the tank, whereby the cylinder 9 extends at a low speed. .

On the other hand, when a control valve (not shown) is operated and the cylinder rod side is connected to the pump side,
The spool 41 performs a stroke operation in the direction opposite to the extension direction to switch to the contraction position c, the oil on the rod side returns to the tank, and the cylinder 9 contracts.

As described above, since the speed-increasing valve V is incorporated in the swivel joint 24, the valve body and piping can be omitted compared with a case where the speed-increasing valve V is separately provided independently of the swivel joint 24. It is possible to reduce the size, weight, and cost. Further, since the speed-increasing valve V is not exposed to the outside, failure of the valve is reduced, and durability can be improved.

In the above embodiment, the lower end (head cover 28) of the inner member 25 of the swivel joint 24 is connected to the opening / closing cylinder 9, and the upper end (flange 31) of the outer member 26 is attached to the crusher mounting portion of the working machine. However, conversely, a configuration in which the upper end of the inner member 25 is connected to the crusher attachment portion 33 and the lower end of the outer member 26 is connected to the opening / closing cylinder 9 may be adopted.

Also, as described above, the swivel joint 2
The configuration in which the flange 31 for the working machine is provided on the inner member 25 or the outer member 26 of the crusher 4 is such that the swivel joint 24 and the opening / closing cylinder 9, the opening / closing cylinder 9 and the arm support 3 are not arranged side by side on the cylinder axis. And the crusher in which the opening and closing cylinder 9 is provided in the opening and closing direction of the arm body 6.

[0041]

As described above, according to the first and second aspects of the present invention, the rod support of the opening / closing cylinder is integrally provided on the arm support. According to the third aspect of the present invention, the head cover of the opening / closing cylinder is integrally provided, and one of the members of the swivel joint is integrally provided with a flange portion connected to the crusher mounting portion of the working machine. Since the speed increasing valve is incorporated in the crusher, the structure of each crusher can be simplified, and its size, weight and cost can be reduced.

According to the fourth aspect of the invention, the valve body and piping can be omitted compared to a case where the speed-increasing valve is separately installed independently of the swivel joint, so that a significant reduction in weight, size, and cost can be achieved. In addition, since the speed increasing valve is not exposed to the outside, the failure of the valve is reduced, and the durability can be improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of a crusher according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged partial cross-sectional view of a swivel joint and a peripheral portion of the crusher.

FIG. 4 is a diagram in which a speed increasing valve and an opening / closing cylinder incorporated in a swivel joint are represented by hydraulic symbols.

FIG. 5 is a sectional view of a swivel joint.

[Explanation of symbols]

 1, 2 arm 6 arm body 3 arm support 4, 5 horizontal axis as a pivot of arm 7, 8 link 17 pin connecting link and open / close cylinder 9 open / close cylinder 18 cylinder tube 19 piston 20 rod 21 open / close cylinder Lower flange 22 Arm support flange / rod cover 23 Bolt connecting lower flange and rod cover 24 Swivel joint 25 Inner member of swivel joint 26 Outer member of swivel joint 28 Flange / head cover provided on inner member 29 Upper part of open / close cylinder Flange 30 Bolt for connecting flanges 31 Flange provided on outer member 34 Flange for crusher mounting part 35 Bolt for connecting flanges 36 Same nut

Claims (4)

[Claims] 1. An openable / closable arm body comprising a pair of arms rotatably mounted on an arm support for sandwiching an object to be crushed, wherein the arm body is provided at right angles to the opening and closing direction of the arm body. In a crusher configured to be driven to open and close by a cylinder, the openable cylinder and the arm support are arranged on the cylinder axis, and the arm support has a rod cover for closing a rod-side opening of a cylinder tube in the openable cylinder. A crusher characterized by being provided. 2. A crusher according to claim 1, further comprising a swivel joint for supplying and discharging pressure fluid to and from said open / close cylinder, on a side of said open / close cylinder opposite to said arm support. A crusher, wherein one of the inner member and the outer member is provided with a head cover for closing a head-side opening of a cylinder tube in the opening / closing cylinder. 3. A pair of arms for sandwiching an object to be crushed is rotatably mounted on an arm support to form an openable and closable arm body. In a crusher having a swivel joint for supplying and discharging a pressure fluid, a flange connected to a crusher mounting portion of a working machine is integrally provided on one of an inner member and an outer member of the swivel joint. Crusher characterized by. 4. An openable and closable arm body comprising a pair of arms rotatably mounted on an arm support for sandwiching an object to be crushed, and an open / close cylinder for driving the arm body to open / close. A crusher having a swivel joint for supplying and discharging a pressurized fluid, wherein a speed increasing valve for increasing the operation of the opening / closing cylinder is incorporated in an inner member of the swivel joint.