JPH09131538A - Position adjusting mechanism of toggle block of jaw crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of the unequal wear of a toggle block and to make rapid and easy position adjustment possible by intervening an elastic body between an upper supporting material and/or lower supporting material and the toggle block, thereby slidably constituting the toggle block. SOLUTION: The toggle block 1 is provided with a groove 11 on the front surface on a crushing chamber side, where one end of a frame toggle plate (i) is supported. Besides, a hydraulic cylinder 2 is used as a means for sliding the toggle block 1 by applying external force thereon. Low-friction materials 12a, 12b are installed from the front surface to the four corners of the rear surface of the toggle block 1. The elastic body 13, such as rubber, is intervened between the lower low-friction material 12a and the toggle block 1. An engaging member 42 is engaged with an engaging hole 14 disposed on the base of the toggle block 1 and one end of a spring 51 for tension for pulling a tension rod 5 is pressed to the rear surface of a reaction plate 43 disposed on the base of a reaction transmission member 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide mechanism for a toggle block of a double toggle or a single toggle jaw crusher.

[0002]

2. Description of the Related Art A jaw crusher is a typical crusher used as a primary crusher for crushing raw rocks. FIG. 3 shows an example of a double toggle jaw crusher. The mined rough stone is put into a crushing chamber c formed between the fixed jaw a and the swing jaw b,
It is crushed by swinging the swing jaw b.

The swing jaw b is a swing jaw shaft d.
Is suspended around a fulcrum, and is oscillated by a pitman f that moves up and down by the rotation of the eccentric shaft e and a toggle mechanism before and after the pitman f. In the case of the double toggle mechanism, it is composed of a joggle plate g that connects the swing jaw b and the pitman f, and a frame toggle plate i that connects the pitman f and the toggle block h.

On the side of the frame toggle plate i, there is provided a safety device when an uncrushable object is bitten in, and also a device for adjusting the crushing gap between the fixed jaw a and the swing jaw b. It is provided. In this gap adjusting device, a toggle block h is slid back and forth, and a frame toggle plate i, a pitman f, and a toggle toggle plate are provided.
The position of the front and rear of the swing jaw b is adjusted via the switch g.

Also, one end of a tension rod j is connected to the lower end of the swing jaw b, and a tension spring l for exerting a reaction force on a reaction force plate k hanging from a toggle block h always keeps the toggle plate side. The toggle plate is pulled out to prevent it from falling off.

Next, the slide mechanism of the conventional toggle block h shown in FIGS. 4 and 5 will be described. The toggle block h is sandwiched between a shelf-like upper support member n and a lower support member o joined to the machine body frame m via a wedge p, and the toggle block h is used during normal crushing operation.
Is fixed.

When adjusting the crushing clearance, the fixing bolt q is removed, the wedge p is pulled out, and the toggle block h is released, and the hydraulic jack r is used to adjust the movement back and forth. After the adjustment, the wedge b is fitted again, and the fixing bolt q is used for fastening. The single jaw crusher does not have the pitman f and the toggle plate g, but has a structure in which the eccentric shaft e is also used as the swing jaw shaft d.

[0008]

[Problems to be solved by the invention]

<B> Since the toggle block h is always pulled toward the toggle plate by the tension spring l, when the pulling reaction force F of the tension spring l acts on the toggle block h via the reaction plate k, Since the toggle block h cannot move forward, rotation moment around the point Q occurs.

Since the conventional toggle block h is formed integrally with the reaction plate k, the rotational moment generated at this time is F × A (the distance from the point Q to the center of the reaction plate k) = M.
And becomes a large rotation moment. Therefore, the load at the time of the crushing operation is concentrated on the point Q of the toggle block h, so that the uneven wear of the portion of the point Q is severe and the frequency of maintenance may increase.

<B> The conventional slide mechanism of the toggle block h has a fixing bolt q and a wedge p each time the position is adjusted.
It was necessary to remove and attach the above, and the work was complicated.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is possible to prevent uneven wear of a toggle block and to quickly and easily adjust the forward and backward positions. It is an object to provide a position adjusting mechanism for a toggle block of a crusher.

[0012]

SUMMARY OF THE INVENTION As a means for solving the above problems, the present invention provides a toggle block which supports the other end of a toggle plate, one end of which is connected to the lower end of a swing jaw, and which is a mechanical frame. In the position adjustment mechanism for the forward / backward movement of the toggle block, which is sandwiched between a pair of upper support members facing each other and a pair of lower support members also facing each other, the upper support member or the lower support member is used. Provided is a position adjusting mechanism for a toggle block of a jaw crusher, characterized in that an elastic body is interposed between one or both of the materials and the toggle block and slidable by means for applying an external force to the toggle block. To do.
In this case, a structure using rubber for the elastic body, a structure in which the contact portion between the upper support member and the lower support member of the toggle block is made of a low friction material, or a means for applying an external force to the toggle block, is connected to the toggle block. A structure using the hydraulic cylinder described above can be adopted. Further, an engagement member that engages in an engagement hole formed on the bottom surface of the toggle block, and a rotation stop plate in which both end edges are housed in a guide groove formed along the lower portion of the lower support member so as to be slidable. Also, it is possible to employ a structure in which a reaction force transmitting member including a reaction force plate that penetrates a tension rod that draws the lower end of the swing jaw and that receives the reaction force of the tension spring is provided. Further, when the reaction force transmitting member is provided, a structure in which the elastic body is not used in the toggle block can be adopted.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
An embodiment of the present invention will be described. 1 and 2
Double toggle jaw crusher frame toggle play
The position adjustment mechanism of the toggle block 1 which supports one end of the toggle i is shown. In the case of a single toggle jaw crusher, the toggle block 1 is of a type that supports the jaw toggle plate.

<a> Toggle block The toggle block 1 is a block body made of steel, and a groove 11 is provided on the front surface on the crushing chamber side.
One end of toi is stored. On the other hand, toggle block 1
A hydraulic cylinder 2 or the like, for example, is connected to the back surface of the toggle block 1 as a means for sliding the toggle block 1 by applying an external force.

Low-friction materials 12a and 12b are provided from the four corners of the front surface of the toggle block 1 to the four corners of the back surface thereof. These improve the sliding property of the toggle block 1 and bear the wear at the time of sliding.

Lower friction material 12a and toggle block 1 at the bottom
An elastic body 13 such as rubber is interposed between the front and back of the toggle block 1. Since the swinging force at the time of crushing acts upward on the toggle block 1 via the frame toggle plate i, it is not necessary to give strength to the elastic body 13 itself against the swinging force.

Further, on the bottom surface of the toggle block 1, between the left and right elastic bodies 13 and at an intermediate position between the front surface and the back surface,
Engagement holes 14 are provided at two locations.

<B> Support Material As shown in FIG. 1, a pair of upper support materials 31 facing each other and a pair of lower support materials 32 facing below each other are provided on the facing surfaces between the mechanical frames 3. Are provided like a shelf.

The distance between the bottom surface of the upper support member 31 and the upper surface of the lower support member 32 depends on the upper low friction material 12 of the toggle block 1.
It is formed to be slightly narrower than the distance between the upper surface of b and the bottom surface of the lower low friction material 12b.

The toggle block 1 is set such that the low friction materials 12a and 12b are sandwiched between the upper support material 31 and the lower support material 32 in a state where the elastic body 13 is contracted. Then, by the force of the contracted elastic body 13 to expand, the low friction materials 12a, 12 above and below the toggle block 1
b is pressed and fixed to the upper support member 31 and the lower support member 32, respectively.

Further, the lower support member 32 is formed in a U-shaped cross section so that two opposing guide grooves 33 are formed along the lower portion of the lower support member 32.

<C> Reaction Force Transmitting Member The reaction force transmitting member 4 is formed by integrally projecting two engaging members 42 on the upper surface of the rotation stopping plate 41 and two reaction force plates 43 on the bottom surface. Is. As shown in FIG. 1, the rotation stop plate 41 has dimensions such that the left and right edges thereof are slidably fitted in the opposed guide grooves 33 provided in the frame 3.

The engagement member 42 is a protrusion provided at a position corresponding to the two engagement holes 14 of the toggle block 1, and is engaged in the engagement hole 14 of the toggle block 1. In addition, one or three or more engaging members 42 may be formed.

The reaction force plate 43 is hung from the rotation stopper plate 41 so as to be orthogonal to the tension rod 5 in a plane, and the tension rod 5 penetrates. Further, on the back surface of the reaction plate 43, the tension rod 5 is provided in the direction opposite to the crushing chamber (see FIG.
One end of the tension spring 51 for pulling in the right direction) contacts, and the reaction force F of the pulling force is transmitted to the toggle block 1 via the reaction plate 43.

[0025]

The hydraulic cylinder 2 is fixed during the crushing operation. In this state, the toggle block 1 has the upper support member 31 and the lower support member 32 due to the force of the elastic body 13 to expand.
It can be crimped to and to keep it fixed.

When adjusting the crushing clearance, the hydraulic cylinder 2 is expanded or contracted. Then, the low friction materials 12a, 12
Since the sliding action by b and the pressure release action by the elastic body 13 further contracting function synergistically, the toggle block 1 can be easily slid back and forth, and position adjustment can be performed quickly and easily.

By the way, as described above, the toggle block 1 of the present invention has a structure that expands and contracts in the vertical direction by the interposition of the elastic body 13. Therefore, when the pulling reaction force F of the tension spring 51 acts on the toggle block 1 via the reaction plate 43, the toggle block 1 cannot move forward, so that the back side of the elastic body 13 contracts, and the point Q becomes the center. Rotational moment is generated.

At this time, the conventional toggle block h shown in FIG.
As shown in FIG. 2, when the toggle block 1 and the reaction plate 43 of the present invention are integrally formed, the rotation moment is F × A (from the point Q to the center of the reaction plate 43 as shown in FIG. 2). Distance)
= M, and a large rotational moment M is generated.

Therefore, since the elastic body 13 has a large contraction rate, the posture of the toggle block 1 is inclined such that the front side thereof is inclined upward, the position of the connecting end of the frame toggle plate i is displaced, and by extension the crushing gap. The set dimensions may be wrong.

Further, since the load during the crushing operation is concentrated on the point Q of the toggle block 1, the uneven wear of the portion of the toggle block 1 at the point Q is severe and the frequency of maintenance may increase.

Therefore, in the present invention, the toggle block 1 and the reaction force plate 43 are provided separately, and the rotation moment M applied to the reaction force plate 43 is absorbed by matching the rotation stop plate 41 and the guide groove 33. We were able to. Therefore, the rotational moment about the point Q is F × B (from the point Q to the engaging hole 14
The distance to the center) = M ', and it was possible to suppress to a small rotational moment.

Therefore, the shrinkage rate of the elastic body 13 is small and the posture of the toggle block 1 is almost unchanged, so that an accurate set size of the crushing gap can be maintained. Further, it is possible to prevent the load during the crushing operation from intensively acting on the point Q of the toggle block 1, so that uneven wear can be prevented and the frequency of maintenance can be reduced.

[0033]

Other Embodiments of the Invention The elastic body 13 may be interposed between the upper low friction material 12b and the toggle block 1 or may be interposed both above and below. Further, the toggle block 1 may be completely divided into an upper block and a lower block, and the elastic body 13 may be interposed between them.
In addition to rubber, a spring or a pine needle spring may be used for the elastic body 13.

Further, the reaction block 4 may be provided on the toggle block without the conventional elastic body 13 shown in FIG. Also in this case, similarly to the above, it is possible to avoid that the load during the crushing operation intensively acts on the point Q of the toggle block 1, so that uneven wear can be prevented and the frequency of maintenance can be reduced. .

[0035]

Since the present invention has been described above,
The following effects can be obtained. <a> By making the toggle block and the reaction force plate separate, the shrinkage ratio of the elastic body is small, and the posture of the toggle block remains almost unchanged, so that the crushing gap can be set at an accurate size. Therefore, the crushed raw material can be crushed to the size as set.

<B> By disposing the toggle block and the reaction plate separately, it is possible to prevent the load at the time of crushing operation from intensively acting on the upper front surface of the toggle block, so that uneven wear can be prevented and maintenance can be performed. Is less frequent. Therefore, cost can be reduced.

<C> It is not necessary to remove and attach the fixing bolt and the wedge each time the position of the toggle block is adjusted as in the conventional case. Therefore, the position of the toggle block can be quickly and easily adjusted.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of an apparatus of the present invention.

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

FIG. 3 is an explanatory view of a conventional technique.

FIG. 4 is an explanatory view of a conventional technique.

FIG. 5 is an explanatory view of a conventional technique.

Claims (6)

[Claims] 1. A toggle block for supporting the other end of a toggle plate, one end of which is connected to the lower end of a swing jaw,
In a position adjusting mechanism for advancing and retracting a toggle block, which is sandwiched between a pair of upper supporting members arranged to face a mechanical frame and a pair of lower supporting members also arranged to face each other, the upper supporting member comprises: Position adjustment of the toggle block of the jaw crusher, characterized in that an elastic body is interposed between one or both of the lower support members and the toggle block, and slidable by means for applying an external force to the toggle block. mechanism. 2. The position adjusting mechanism for a toggle block of a jaw crusher according to claim 1, wherein rubber is used for the elastic body. 3. The low friction material is used for the contact portion between the upper support member and the lower support member of the toggle block.
The position adjusting mechanism of the toggle block of the joe crusher according to claim 1 or 2. 4. The position adjustment of the toggle block of the joe crusher according to any one of claims 1 to 3, wherein a hydraulic cylinder connected to the toggle block is used as a means for applying an external force to the toggle block. mechanism. 5. A rotation member in which both end edges are housed in a guide groove formed along a lower portion of a lower support member and slidably arranged so that the engaging member engages in an engagement hole formed on a bottom surface of the toggle block. 5. A reaction force transmitting member including a stop plate and a reaction force plate that penetrates a tension rod that draws the lower end of the swing jaw and that receives the reaction force of the tension spring, is provided. The position adjustment mechanism for the toggle block of the jaw crusher according to any one of 1. 6. A toggle block for supporting the other end of a toggle plate, one end of which is connected to the lower end of a swing jaw,
In the forward / backward position adjusting mechanism of the toggle block, which is sandwiched between a pair of upper supporting members arranged to face the mechanical frame and a pair of lower supporting members also arranged to face each other, the bottom surface of the toggle block. The engaging member that engages in the engaging hole formed in, the rotation stop plate in which both edges are housed in the guide groove formed along the lower portion of the lower support member so as to be slidable, and the lower end of the swing jaw. A position adjusting mechanism for a toggle block of a jaw crusher, characterized in that a reaction force transmitting member formed of a reaction force plate for penetrating a tension rod that draws the portion and for receiving a reaction force of a tension spring is provided.