JPS648571B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rock crushing device that crushes rocks to make gravel.The purpose of the present invention is to create a revolutionary device that can produce gravel from quarrying all at once with a single device. The objective is to provide a crushing device that is

Conventionally, when producing gravel, which is mainly mixed with cement and used as aggregate for concrete, from quarrying, multiple units of the same type of equipment have been used, which has been extremely inefficient and uneconomical. In other words, this type of conventional crushing device, called a cone crusher, has a cylindrical outer wall whose diameter widens toward the bottom, and a crushing member with an eight-shaped cross section corresponding to the outer wall at the top. A main shaft fixed to the outside is hung so as to be swingable, and an eccentric ring is fitted to the lower part of the main shaft with its center of rotation offset from the center of the shaft, and this eccentric ring is connected to a bevel gear. By transmitting and driving the rotation of the motor through a mechanism, the lower part of the shaft is rotated around the rotation center of the eccentric wheel, and the gap between the outer wall body and the crushing member is adjusted according to the swinging of the shaft. The structure is such that the rock thrown into this gap is crushed by being pressed against the outer wall by a crushing member.

Therefore, since the shaft having the crushing member attached to the upper part thereof is oscillated by rotating the lower part thereof, the swinging change of the crushing member is not so large. Therefore, after preparing multiple devices with the same configuration as above but differing only in the gap between the outer wall and the crushing member, for example, the first device crushes the rock in half, and the crushed stone is transferred to the second device. Then, by further cutting it in half, the required gravel is created through the process that follows.
There are many problems, such as inefficiency and high costs, as well as the need for a large space for installing multiple devices.

The object of the present invention is to provide a rock crushing device that can solve these problems.

In order to achieve such an object, the present invention fixes a cylindrical outer wall shell in a vertical state, the upper and lower parts of which are formed so as to spread out like skirts toward the opening, and the center of the outer wall shell is fixed vertically. To,
A cylindrical crushing member that spreads downward from the top is supported at the center of its lower end by a spherical shaft, and is swingably installed in the gap between the crushing member and the outer wall shell.
An annular crushing space is formed that gradually becomes narrower toward the bottom, and an eccentric wheel rotated by a rotational drive source is placed at the upper end of the crushing member so that its center of rotation is relative to the center of the crushing member. At the same time, the eccentric ring and the crushing member are engaged by an alignment bearing structure using a spherical bearing fitted between them, and the upper part of the crushing member is rotated around the central axis of the eccentric ring. The spherical shaft of a spherical bearing metal is moved to change the crushing space in accordance with the rocking of the crushing member, and the spherical shaft penetrates through the center of the spherical shaft and is movably crowned by the spherical shaft. A hydraulic circuit is provided for a path from the sliding contact portion with the crushing member to the spherical bearing, and the hydraulic pressure of the circuit causes the spherical bearing metal and the crushing member fixed to the lower end to be slightly rotated with respect to the spherical shaft. The gist is a rock crushing device that is characterized by being floated to create gaps.

Hereinafter, one embodiment of the present invention will be explained in detail based on the drawings.

In FIG. 1, 1, 2, and 3 indicate an upper frame, an intermediate frame, and a lower frame, respectively;
A machine frame is constructed on a machine base 4 by these frames 1, 2, and 3. A cylindrical main outer wall shell 5 whose diameter gradually decreases from the top to the bottom is attached to this machine frame.
A lower outer wall shell 6 whose diameter increases downwardly and a top cell liner whose diameter increases upwardly abut against the lower and upper circumferential surfaces of the main outer wall shell 5, respectively. 7 are connected in series, and these constitute an outer wall shell into which rocks are to be thrown. Reference numeral 8 indicates an oil jack installed in the center of the machine base 4. A spherical shaft 9 is vertically placed on the oil jack 8, and a bearing member 1 is fitted into a guide tube 10 so as to be movable up and down.
1 holds the spherical shaft 9 in a vertical state, and holds the spherical shaft 9 in a predetermined position unless a load exceeding a predetermined value is applied to the spherical shaft 9, and when a load exceeding a predetermined value is applied to the spherical shaft 9. is lowered, and when the load is removed, the spherical shaft 9 is raised and returned to its original position. Reference numeral 12 denotes a crushing member supported by a spherical shaft 9, which has a cylindrical shape whose diameter gradually decreases toward the bottom, and a spherical shaft on the lower end surface of a core shaft body 14 with a small diameter shaft portion 13 extending from the top. A spherical bearing metal 15 that is slidably crowned on the shaft 9 is fitted and fixed, and a cone cape 16 having a cylindrical shape in an eight-shaped cross section is externally fitted and fixed on the core shaft body 14.
An annular crushing space 17 that gradually narrows downward is formed between the cone cape 16 of the crushing member 12 and the main outer wall shell 5 and lower outer wall shell 6 of the outer wall shell.

Reference numeral 18 indicates an eccentric ring, which is mounted on the small diameter shaft portion 13 by aligning the center line C2 of the cavity portion 19, which is offset with respect to the rotation center C1, with the center line of the small diameter shaft portion 13. Head bearing bracket 21, collar ring 22, thrust cover 2
3. It is rotatably held in the upper frame 1 by a main bearing 24, a bearing sleeve 25, etc. At the top of this eccentric wheel 18 is a mounting shaft 2.
6 protrudes, a V pulley 27 is fitted onto this mounting shaft 26, and a motor (not shown) installed in this V pulley 27 and a motor base 28.
The rotation of the motor is transmitted through a pulley (not shown) attached to the motor and a belt (not shown) wound around the belt (not shown), so that the motor is rotated. Then, the small diameter shaft 13 and the eccentric ring 18 are engaged by a self-aligning mechanism in which an elastically deformable spherical bearing 29 is inserted between the small diameter shaft 13 and the eccentric ring 18. The portion 13 is the rotation center C1 of the eccentric wheel 18
rotated around.

Reference numeral 30 denotes a hydraulic transmission pipe connected to a hydraulic pump (not shown), and communicates with an oil passage 31 that is penetrated and bored along the center line of the spherical shaft 9. or,
The spherical bearing metal 15 has an oil passage 32 penetrating from the sliding surface with the spherical shaft 9 to the side surface, and radial oil grooves 33 on the fitting surface with the core shaft body 14. In the shaft body 14 and the small diameter shaft part 13, the spherical bearing 2 rises along the center line from the fitting surface with the spherical bearing metal 15 and extends from the center of the small diameter shaft part 13.
An oil passage 34 is perforated to reach the joint surface with the small diameter shaft portion 13 and the spherical bearing 29, and an oil circulation pipe 35 is provided from the joint surface of the small diameter shaft portion 13 and the spherical bearing 29 to the hydraulic pump. 9 and the spherical bearing metal 15, an oil passage 32, an oil groove 33, an oil passage 34, a joint surface between the small diameter shaft portion 13 and the spherical bearing 29, an oil circulation pipe 35, and a hydraulic circuit that circulates the hydraulic pump. Due to this oil pressure, the spherical bearing metal 15 is slightly floated from the spherical shaft 9, so that a small gap is always created, so that the crushing member 12 can swing smoothly.
In the figure, numeral 36 represents an oil seal, numeral 37 represents a belt cover, and numeral 38 represents a dust cover.

In the embodiment device configured as described above, when the motor is driven to rotate, this rotation is transmitted by the belt and the eccentric wheel 18 is rotated. In such a case, since the center line C2 of the crushing member 12 is deviated from the rotation center C1 of the eccentric wheel 18, the small diameter shaft portion 13 is deviated from the rotation center C1 of the eccentric wheel 18, as shown in FIGS. 2a, b, and c. The crushing member 12 is rotated around the rotation center C1, and its lower end slides on the spherical shaft 9, causing it to swing greatly, and the crushing space 17 changes in accordance with the rocking of the crushing member 12. Therefore, when a rock is thrown into the crushing space 17 as shown by the dashed line in FIG. I will do it. Here, the crushing space 17 gradually becomes narrower from above to below, and the swinging range of the crushing member 12 is larger than that of conventional devices of this type, and the lower end of the cone cape 16 is connected to the lower outer wall. Since it is in rolling contact with the barrel 6, the required gravel can be obtained at once by inputting ordinary quarry stone. Further, since the crushing member 12 is constantly floated from the spherical shaft 9 by hydraulic pressure and this oil is used for lubrication between the small diameter shaft portion 13 and the spherical bearing 29, the crushing member 12 is prevented from swinging. It runs extremely smoothly. Further, when crushed stones become clogged between the lower end of the cone cape 16 and the lower outer wall shell 6 and a large load is applied to the spherical shaft 9, the oil jack 8 detects this and lowers the spherical shaft 9. As a result, the crushing member 12 placed on the spherical shaft 9 is also lowered, the cone cape 16 is detached from the lower outer wall shell 6, and the clogged crushed stones are dropped, thereby eliminating the heavy load. Then, the spherical shaft 9 is raised again to its original position by the oil jack 8 and held there, thereby preventing the device from being damaged or malfunctioning due to heavy loads.

As described above, according to the rock crushing device of the present invention, the lower end of the crushing member is supported by the spherical shaft, the upper end is rotated by the eccentric shaft to swing the whole body, and the crushing member spreads downward from the top. Since the crushing member has a cylindrical shape (cone shape), the swinging range of the crushing member from the upper part to the lower part is significantly larger than that of conventional devices of this type. Therefore, the annular rock crushing space formed in the gap between the outer wall shell and the crushing member can be provided in the entire upper and lower portions so that it gradually narrows from the top downward, and the rock crushing space can be provided with only one device. Gravel of desired particle size can be obtained from In this way, since only one device is required, it is possible to significantly reduce the production cost of gravel, and it is also possible to obtain extremely significant practical effects such as extremely high efficiency and not requiring a large space to install the device. can. Furthermore, unlike conventional equipment in which the main shaft is suspended, the lower end surface is supported by a spherical shaft, and a small gap is always created where the spherical bearing metal is slightly lifted from the spherical shaft by hydraulic pressure. As a result, the crushing member can oscillate and rotate without any load, and has the advantage of being excellent in robustness and being able to obtain a powerful crushing force.

[Brief explanation of the drawing]

The drawings show an embodiment of the rock crushing device of the present invention, and FIG. 1 is a longitudinal cross-sectional view, and FIGS. 2 a, b, and c each illustrate the operational relationship between the eccentric wheel and the small diameter shaft portion of the crushing member. FIG. 2 is a cross-sectional view taken along line AA in FIG. 5... Main outer wall shell, 6... Lower outer wall shell, 9... Spherical axis,
12... Crushing member, 15... Spherical bearing metal, 17...
Crushing space, 18... Eccentric wheel, 22... Spherical bearing, C
1... Center of rotation.

Claims (1)

[Claims] 1. A cylindrical outer wall shell whose upper and lower parts are formed to widen into a skirt shape toward the opening is fixed vertically, and at the center of this outer wall shell,
A cylindrical crushing member that spreads downward from the top is supported at the center of its lower end by a spherical shaft, and is swingably installed in the gap between the crushing member and the outer wall shell.
An annular crushing space is formed that gradually becomes narrower toward the bottom, and an eccentric wheel rotated by a rotational drive source is placed at the upper end of the crushing member so that its center of rotation is relative to the center of the crushing member. At the same time, the eccentric ring and the crushing member are engaged by an alignment bearing structure using a spherical bearing fitted between them, and the upper part of the crushing member is rotated around the central axis of the eccentric ring. The spherical shaft of a spherical bearing metal is moved to change the crushing space in accordance with the rocking of the crushing member, and the spherical shaft penetrates through the center of the spherical shaft and is movably crowned by the spherical shaft. A hydraulic circuit is provided for a path from the sliding contact portion with the crushing member to the spherical bearing, and the hydraulic pressure of the circuit causes the spherical bearing metal and the crushing member fixed to the lower end to be slightly rotated with respect to the spherical shaft. A rock crushing device characterized by being floated so that gaps are created.