JPS6132058B2 - - Google Patents

Description

[Detailed Description of the Invention] The conventional double toggle type jaw crusher is
A movable tooth plate is fixed to a swing jyo, and the upper part of the swing jyo is supported by a shaft, and the swing jyo is swung through a pitman and a toggle plate fitted on an eccentric shaft rotated by a motor to form a fixed tooth plate. Materials to be crushed, such as rocks and ores, are crushed between the two.

Therefore, mechanically, the crusher of this structure crushes rocks during the forward movement of the swing jaw, that is, the process in which the eccentric shaft moves from the bottom dead center to the top dead center, and during the backward movement, that is, the eccentric shaft moves from the top point to the bottom dead center. During the moving process, rocks are ejected. Therefore, the motor power is not effectively used when the swing jyo moves backward.

For this reason, there is a problem that this type of crusher has a lower throughput per unit power than a rotary crusher in which crushing is performed continuously.

The technical problem of the present invention is to accumulate the motor power during the reversing of the swing jyo and utilize it during crushing. The technical means of the present invention taken to solve the above-mentioned technical problem is to provide a power assisting means for lifting the pit man fitted to the eccentric shaft with a spring near the top dead center.

The above technical means works as follows.

During operation, when the eccentric shaft moves from the top dead center to the bottom dead center (backward stroke), the spring of the power assisting means is compressed and energy is accumulated, and when the eccentric shaft moves from the bottom dead center to the top dead center ( Crushing process) The restoring force of the spring of the power assisting means, that is, the stored energy of the spring works (releases) to help rotate the eccentric shaft through the pittman, so this force is added to the power during crushing. .

Accordingly, the throughput per unit motor power is improved.

The present invention produces the following unique effects.

Normally, in this type of crusher, when starting up, the eccentric shaft directly supports part of the weight of the swing jaw and the weight of the pit man and toggle plate, so when the operation is stopped, the pit man is brought to the bottom dead center due to its own weight, and the eccentric shaft is The shaft also becomes eccentric downward (bottom dead center).

Therefore, when operation is started in this state, the eccentric shaft must rotate the pit man from the bottom dead center to the top dead center against the weight of the member, and therefore a large starting torque is required.

However, in the crusher of the present invention, the pit man is started from a suspended state by the spring of the power assisting means, so that the starting torque can be significantly reduced. This means that even large machines that conventionally required a wire-wound motor can be started with an inexpensive cage-type motor.

Embodiments of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 indicates a main body claim serving as a rear wall, and a fixed tooth plate 2 is fixed to the front part of the main body claim.

Reference numeral 3 denotes left and right body claims, and a side wall 4 is fixed to the inside of the left and right body claims 3 using bolts or the like.

Reference numeral 5 denotes fixed bearings on the left and right main body claims 3, and both ends of an eccentric shaft 6 are rotatably supported by the bearings 5.

Reference numeral 7 denotes a pitman, into which an eccentric portion of the eccentric shaft 6 is fitted into a shaft hole at its upper end.

8 is a swing jyo, and 9 is a swing jyo axis. The swing-jyo shaft 9 is rotatably fitted to the upper part of the swing-jyo 8, and
Fixed.

10 is a rear claim fixed to the rear of the left and right main body claim 3, and a toggle block 1 is attached to the front of the rear claim.
1 is fixed.

A toggle plate 12 is interposed between the toggle block 11 and the lower part of the pitman 7 and the lower part of the swing gear 8, respectively.

Reference numeral 13 denotes a power assisting means disposed directly above the pit man 7, which includes a spring holder 14 fixed to the claim of the main body, a hanging bolt 15 whose lower end is rotatably connected to the seat on the upper part of the pit man 7 with a pin, The bolt 15 is loosely fitted into the through hole of the pedestal 14, and a spring holder 17 is provided, which can be freely adjusted by a nut 16 screwed onto the upper end of the bolt 15.
A coiled spring 19 is arranged in a compressed state between the spring seats 18 with a loose space between them, and the upward force of the spring 19 is applied to the pit man 7 via the hanging bolt 15.

A hydraulic jack 25 is provided below the spring seat 18, so that the appropriate set load of the spring 19 can be freely adjusted during startup and crushing.

Also, for the set load of the spring 19 at startup,
It is also possible to increase the set load at the time of crushing during operation to increase the stored energy of the spring 19.

The left and right side walls 4 fixed to the inside of the left and right main body claims 3 have a fixed tooth plate 2 and a swing jaw 8.
The crushing chamber 2 is provided between the movable tooth plate 20 attached to the swing jaw 8 and the side wall 4 of the fixed tooth plate 2.
1.

22 is a flywheel fixed to both ends of the eccentric shaft 6; one flywheel has a V groove and is driven by a V belt by an appropriate drive device.

The present invention has the above configuration, and the swinging jaw 8 swings by driving the eccentric shaft 6 similarly to the known jaw crusher, and the supply port 23 at the upper end
The material to be crushed, which is introduced into the crushing chamber 21 from the fixed tooth plate 2
and the movable tooth plate 20 and descend while being crushed,
It is discharged from the discharge port 24 at the lower end.

In the above operation, the pit man 7 is lifted up by the spring 19 via the hanging bolt 15, and the eccentric shaft 6
When the crusher is started, the eccentric shaft 6 is eccentric upward in balance with the weight of the parts applied to it, that is,
Keep Pittman 8 at top dead center.

Further, during operation, when the swinging jaw 8 moves toward the fixed tooth plate 2 and crushes the material to be crushed between the fixed tooth plate 2 and the movable tooth plate 20, the load applied to the eccentric shaft 6 increases. That is, the eccentric portion of the eccentric shaft 6 moves from the bottom dead center to the top dead center, and the spring 19 works to assist the movement of this eccentric portion. Also, while the eccentric shaft rotates from the top dead center to the bottom dead center, the swing jaw 8 retreats with respect to the fixed tooth plate 2, resulting in a discharge stroke.
When the swinging jaw 8 retreats, that is, during the downward stroke of the pitman 7, the spring 19 is compressed and energy is accumulated, and during the crushing stroke, this accumulated energy is released and added to the power during crushing.

In the embodiment described above, the power assisting means 13 is provided on the upper part of the pit man 7, but it may also be provided between the lower end of the pit man 7 and a foundation (floor) not shown to push up the pit man 7.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-section showing a certain embodiment of a geo-crushing device according to the present invention, and FIG. 2 is a partial vertical cross-sectional front view of the same. 2...Fixed tooth plate, 6...Eccentric shaft, 7...Pittman,
8... Swing Jiyo, 12... Toggle plate,
13...Power assisting means, 20...Moving tooth plate.

Claims (1)

[Claims] 1 Consisting of a fixed tooth plate and a movable tooth plate, the upper part of a swing jyo with the movable tooth plate fixed is pivotally supported, and the swing jyo is swung by a pitman fitted with an eccentric shaft and left and right toggle plates. 1. A double toggle type jyo crusher characterized in that the pit man fitted on the eccentric shaft is provided with power compensation means for hoisting the pit man near top dead center with a spring.