JPH0515000Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a crusher, and in particular, a bracket connected to an arm and a link of a hydraulic excavator;
The attachment mechanism for the frame rotatably attached to the bracket has been improved to reliably prevent the frame from falling off during use and to improve work safety.

Conventional technology Conventionally, a crusher that is attached to this type of hydraulic excavator as an attachment and used for crushing concrete structures, etc. has a bracket attached to an arm and a link attached to a boom installed on a traveling truck, and A frame that supports the crushing arm so that it can be opened and closed is attached using a lock nut or the like.

That is, as shown in FIG. 4, the mounting pin 2 is inserted into the mounting hole 1a of the frame 1 from below and fixed.
Mounting hole 3 of bracket 3 placed on frame 1
The threaded portion 2a of the mounting pin 2 is projected from a,
The frame 1 is attached to the bracket 3 by tightening a lock nut 4 to the threaded portion 2a.

Problems to be Solved by the Invention When the frame 1 is attached to the bracket 3 by only fastening the mounting pin 2 and the lock nut 4 as described above, the lock nut may loosen during use.
Alternatively, if the lock nut breaks, the bracket and frame will become uncoupled. Because crushers are subject to large impact forces and vibrations, the lock nuts mentioned above are likely to loosen or break. If the lock nuts break, the frame may fall out while gripping the crushed concrete, leading to the risk of a major accident. . In addition to the above-mentioned connection method using a lock nut, the above-mentioned problem occurs in any method of fastening with screws.

The present invention was developed in view of the above-mentioned problems, and uses a lock nut fastening method and a stopper pin connection mechanism to reliably maintain the connection between the bracket and the frame and prevent the frame from falling off.

Means for Solving the Problems That is, the present invention is a crusher for concrete, etc. that is detachably attached to an arm and a link attached to a boom installed on a traveling trolley, and includes a crusher for crushing concrete, etc., which is detachably attached to an arm and a link attached to a boom installed on a traveling truck. A bracket is provided for attaching and detaching the attached mounting piece to the arm and the link, a mounting hole is bored in the center of the lower plate part of the bracket, and an annular flange protruding downward is provided on the outer periphery of the lower plate part. , through-holes extending linearly in the left-right and front-rear directions are bored on both the front and rear sides of the flange and on both the left and right sides, and a disc-shaped protrusion that fits inside the flange of the bracket is provided on the upper surface of the upper plate. a mounting hole is bored in the center of the disc-shaped protrusion, an annular groove is formed on the outer peripheral surface of the disc-shaped protrusion, and a mounting pin is inserted into the mounting hole of the frame from below. The small-diameter cylindrical portion at the upper end of the insertion pin is passed through the mounting hole of the bracket to protrude, and a lock nut is screwed onto the male thread formed on the outer peripheral surface of the small-diameter cylindrical portion to fasten the pin. Insert a stopper pin into the through hole of the flange, and with a part of the stopper pin engaged in the annular groove, attach a plug to the tip protruding from both ends of each through hole and fix it to the bracket. The present invention provides a crusher characterized in that the frame is connected to the crusher by a lock nut and a stopper pin.

Furthermore, the present invention provides for a thrust disk and a radial disk to be interposed between the frame and the bracket and between the frame and the mounting pin, and for the thrust disk and the radial disk to be made of a softer material than the frame and the bracket. A crusher according to claim 1 is provided.

Function As described above, in the present invention, the stopper pin is inserted through the through hole drilled in the bracket to the annular groove cut in the frame, and the stopper pin is fixed with a plug, so that the bracket and frame are connected by the stopper pin. is locked in the horizontal direction, and the stopper pin is inserted into the entire through-hole of the bracket and abuts against the annular groove of the frame over a wide range, so the surface pressure can be increased, which makes it possible to hold the frame against the bracket. The frame is securely held and connected, and therefore, even if the lock nut loosens or the lock nut breaks, the frame can be reliably prevented from falling off.

In addition, by interposing a thrust disk and a radial disk between the frame and the bracket and between the frame and the mounting pin, contact between the frame and the bracket and the frame and the mounting pin is eliminated, thereby preventing damage to the frame and bracket due to wear and contact. In addition, since the thrust disk and radial disk are made of a softer material than the frame and bracket, the wear and tear of the bracket and frame is compensated for by the radial disk and thrust disk, and by replacing these disks. The durability of the frame and bracket can be improved.

Embodiments Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

In the embodiment of the present invention shown in FIGS. 1 to 3, 10 is a bracket that is detachably attached to an arm and link (not shown) attached to a boom installed on a traveling truck, and 11 is a crushing arm (not shown). ), 12 is a mounting pin, 13 is a lock nut, 14 is a stopper pin, 15 and 16 are thrust disks, and 17 is a radial disk.

The bracket 10 has a pair of mounting pieces 28 protruding from the upper surface of a disc-shaped lower plate portion 20 to be fixed to an arm of a hydraulic excavator. A thick flange 21 is formed on the outer periphery of the lower plate portion 20 to protrude downward, and as shown in FIG. Through holes 22 and 23 are formed that open to the surface, and through holes 24 and 25 that extend linearly in the front-rear direction and open at both ends to the outer circumferential surface of the flange are formed on both left and right sides. These through holes 22, 23, 24,
24 constitutes a through hole in the shape of a rectangular frame centered on the center point of the lower plate portion. These through holes 2
Since the center portions 2 to 25 are set to be located inward from the inner circumferential surface of the flange, to be more precise, they each consist of two opposing through holes 22a and 22b to 25a and 25b. The bracket 10
A mounting hole 26 is provided in the center of the lower plate portion 20 to allow the mounting pin 12 to pass through, and screw holes 27 are provided on both sides for mounting a lock nut rotation prevention flange.
has been established.

The upper plate 30 of the frame 11 has the flange 21
A disc-shaped protrusion 31 is provided with dimensions to fit inside the disc-shaped protrusion 31 , and an annular groove 32 is carved on the outer peripheral surface of the disc-shaped protrusion 31 .
The through holes 22 to 25 are set to be located in the tangential direction of 2. Therefore, through holes 22 to 25
When the linear stopper pin 14 is inserted into the annular groove 32, it fits tangentially into the annular groove 32. The stopper pin 14 is partially fitted into the annular groove 32 and passed through the through holes 22 to 25 from the outer periphery of one end of the flange 21 to the outer periphery of the opposite end, and with plugs 33 attached to both ends, each stopper pin is attached to the bracket 10. 14 is fixed. In addition, a recess 34 is formed on the upper surface of the center of the disc-shaped protrusion 31 of the frame 11, and the mounting pin 1 is inserted from the center of the bottom surface of the recess 34.
A mounting hole 35 is drilled through the mounting hole 3.
Pin holes 36, 37 for disk mounting on the outer periphery of 5
is formed. That is, the thrust disk 15 is fitted onto the outer periphery of the recess 34, and the thrust disk 15 is fixed to the frame 11 by the dowel pin 38, and the inner periphery of the recess 34 extends from the inner periphery of the mounting hole 35. Radial disk 1
7 and attach the frame 11 with the dowel pin 39.
is fixed. Furthermore, the upper plate 3 of the frame 11
A recess 29 is formed at the outer periphery of the mounting hole 35 on the lower surface of the 0.

The mounting pin 12 has a flange 41 that fits into the recess 29 at the lower end of the hollow cylindrical part 40, a pin hole 42 for mounting the disk in the flange 41, and an outer peripheral surface at the upper end of the cylindrical part 40. male screw 4
A small diameter cylindrical portion 44 is formed. The thrust disk 16 is fitted into the cylindrical portion 40 of the mounting pin 12 and installed on the flange 41, and the knock pin 45 is inserted into the pin hole 42 of the mounting pin through the pin hole 46 drilled in the thrust disk 16 and fixed. are doing. With the thrust disk 16 installed, insert the mounting pin 12 into the mounting hole 35 of the frame 11.
into the recess 29 of the frame 11 from below.
, through the thrust disk 16 to the flange 41
mate. A radial disk 17 is interposed between the cylindrical portion 40 and the inner peripheral surface of the mounting hole 35, and the portion protruding from the mounting hole 35 is the frame 11.
The small diameter cylindrical portion 44 of the mounting pin 12 extends through the mounting hole 26 of the bracket 10 mounted on the upper surface of the mounting pin 12 .

The frame 11 and the bracket 10 are fastened together by screwing the lock nut 13 into the outer peripheral male thread 43 of the small diameter cylindrical portion 44 of the protruding mounting pin 12. As shown in the figure, the lock nut 13 consists of two annular nuts of the same shape, each having a female screw 5 screwed into the male screw 43 of the mounting pin 12.
0 is formed on the inner peripheral surface, and a pin hole 51 is formed on the outer peripheral surface. A swivel mounting hole 52 is formed on the upper surface of the lock nut to be mounted on the upper side. After the lock nut 13 is fastened to the mounting pin 12, it is fixed to the bracket 10 by a pair of left and right anti-rotation flanges 53. Therefore, a pin 54 that fits into the pin hole 51 is provided protruding from the rotation stopper flange 53, and a bolt hole 55 is bored in the lower end flange, and a mounting bolt 56 is inserted into the hole 54.
5 and screwed into the screw hole 27 of the bracket 10, thereby preventing the lock nut 13 from turning (loosening).

A swivel 60 constituting a hydraulic rotary joint is fitted and attached to the inner space of the mounting pin 12, and the upper flange portion 61 of the swivel 60 is fixed to the upper lock nut 13 via a mounting bolt, while Swivel mounting flange 6 on the lower end side
2. It is attached and held to the frame 11 with mounting bolts 63.

The above-mentioned bracket 10 and frame 11 are made of cast metal such as silicon manganese steel, and are made of materials having strength and durability. On the other hand, between the bracket 10 and the frame 11,
Thrust disks 15 and 16 and radial disk 17 interposed between frame 11 and mounting pin 12
is made of general steel material (SS material), which is less durable and wears out faster than the above-mentioned castings, but is inexpensive.

As mentioned above, bracket 10 and frame 1
1 with the mounting pin 12 and lock nut 13.
In addition to screw tightening, the lock nut 13 is connected by horizontal locking with the stopper pin 14, so the lock nut 13 may loosen due to vibration, etc.
Even if the frame 11 breaks due to impact, the stopper pin 14 can prevent the frame 11 from coming off the bracket 10 and falling off.
In addition, since the lock nut 13 itself is prevented from rotating by the anti-rotation flange 53, the lock nut 13 is less likely to loosen.

Furthermore, between the bracket 10 and the frame 11,
Since the thrust disks 15 and 16 and the radial disk 17 are interposed between the frame 11 and the mounting pin 12, the bracket 10 and the frame 11
Wear and damage caused by contact with each other can be reduced. On the other hand, since the disks 15, 16, and 17 are made of a softer material than the bracket 10 and frame 11,
However, by replacing these when worn, the life of the bracket 10 and frame 11 can be extended. In particular, the bracket 10 and frame 11 are made of cast metal and are expensive, whereas the disk is inexpensive, so this is extremely advantageous in terms of cost and durability.

Note that the present invention is not limited to the above-mentioned embodiments, and the number of stopper pins installed is not limited to four, but can be increased as the diameter of the lower plate portion of the bracket becomes larger.

Effects As is clear from the above explanation, according to the crusher according to the present invention, the bracket and the frame are connected by two methods: screw tightening with a lock nut and locking with a stopper pin. It is possible to reliably prevent the connection from becoming disconnected and falling off, thereby preventing accidents from occurring. Furthermore, by replacing the thrust disk and radial disk when they become worn out, the crusher itself has various effects such as improved durability and extended life.

[Brief explanation of drawings]

Fig. 1 shows a crusher according to the present invention, a plan view of the bracket with the frame attached, Fig. 2 is a partially sectional front view of Fig. 1, and Fig. 3 is an exploded perspective view of the attachment part between the bracket and the frame. 4 are sectional views schematically showing a conventional example. 10...Bracket, 11...Frame, 12
...Mounting pin, 13...Lock nut, 14...
Stopper pin, 15, 16...Thrust disk, 17...Radial disk, 20...Bracket lower plate, 21...Flange, 22-25...
Through hole, 26... Mounting hole, 30... Frame top plate, 32... Annular groove, 35... Mounting hole, 53...
...Lock nut anti-rotation flange, 60...swivel.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A crusher for concrete, etc. that is removably attached to an arm and link attached to a boom installed on a traveling trolley, which is attached so as to protrude from the upper surface of a disc-shaped lower plate part 20. A bracket 10 is provided to detachably attach the piece 28 to the arm and the link, and a mounting hole 26 is bored in the center of the lower plate part 20 of the bracket, and an annular flange 21 protrudes downward from the outer periphery of the lower plate part. Through holes 22, 23, which extend linearly in the horizontal direction in the left-right direction and the front-rear direction are provided on both the front and rear sides of the flange 21, and on both the left and right sides.
24 and 25, and a frame 11 having a disc-shaped protrusion 31 that fits inside the flange 21 of the bracket protrudes from the upper surface of the upper plate 30, and is attached to the center of the disc-shaped protrusion 31. A hole 35 is bored and an annular groove 32 is formed on the outer peripheral surface of the disc-shaped protrusion 31, and the mounting pin 12 is inserted from below into the mounting hole 35 of the frame 11, and the small diameter of the upper end of the insertion pin is The cylindrical portion 44 is inserted into the mounting hole 26 of the bracket 10.
The lock nut 1 is inserted into the male screw 43 formed on the outer peripheral surface of the small diameter cylindrical portion.
At the same time, the stopper pins 14 are inserted into the through holes 22 to 25 of the flange 21 of the bracket, and with a part of the stopper pins 14 engaged with the annular grooves 32 of the frame, each through hole is inserted. Attach the plugs 33 to the tips protruding from both ends of the holes 22 to 25 and attach the bracket 1.
0, bracket 10 and frame 11.
and lock nut 13 and stopper pin 1
A crusher characterized by being connected with 4. 2 Thrust disks 15, 16 and radial disk 17 are interposed between frame 11 and bracket 10 and between frame 11 and mounting pin 12, and these thrust disks 15 and radial disk 17 are interposed between frame 11 and bracket 10. The crusher according to claim 1, wherein the crusher is made of a soft material.