JPH026573B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rotary upper millstone mill for grinding raw materials such as grains, tea leaves, medicinal roots, and inorganic substances.

[Prior art]

Conventional stone mills for grinding grains and the like include an upper mill rotation type and a lower mill rotation type.

In the former method, as shown in FIG. 1, an upper mill 3 is rotatably mounted on a lower mill 2 fixed to a support 1, and a driving force is applied from a motor 4 to a main shaft 7 via a belt 5 and a pulley 6. The main shaft 7 passing through the lower mill 2 rotates the upper mill 3. The gap between the lower mill 2 and the upper mill 3 is adjusted by operating the gap adjustment handle 8 and rotating the main shaft 7 via a lever 9. The upper mill 3 is adjusted by raising and lowering the upper mill 3, and the raw material supplied from the raw material input port 10 at the upper part of the upper mill 3 is passed through a passage 11 eccentric to the main shaft 7.
It is supplied to the gap between both dies 2 and 3.

Since this type of grinder is driven by an upper mill, the rotation speed is as low as about 20 to 40 rpm, which has the drawbacks of poor workability and a small effective grinding area for eccentric feeding of raw materials.

The latter was developed to improve upon this drawback.

In the latter case, as shown in FIG. 2, an upper mill 3 is fixed to a cover 1a of the support 1 by a holding mechanism 1b on the upper part of a lower mill 2 which is rotatably arranged on a support 1, and is driven by a motor 4. The force is transmitted to the main shaft 7 via the belt 5 and pulley 6, and the main shaft 7 rotates the lower mill 2. The gap between the lower mill 2 and the upper mill 3 is adjusted by operating the gap adjustment handle 8. Main shaft 7 via lever 9
It is adjusted by raising and lowering the lower mill 3.
The raw material supplied from the raw material input port 10 at the upper part of the upper mill 3 is centrally supplied from a passage 11 disposed coaxially with the main shaft 7.

Since this type of machine is driven by a lower mill, the rotation speed is high at approximately 200 to 300 rpm, which has improved workability and expanded the effective grinding area, but the quality of the material to be ground is improved. The former is inferior to the former, and since the rotation speed of both is fixed, it is necessary to have both of them aligned in order to perform rough grinding to finish grinding, and in both cases, the crushing pressure is equal to the weight of the upper mill. It was adjusted by increasing or decreasing the fixed weight.

[Purpose of the invention]

In view of the above points, the present invention enables rotary drive from low to high speeds, allows easy adjustment of the gap between both dies, prevents damage to the dies even when foreign objects are bitten, and allows for easy setting of grinding pressure. The purpose of the present invention is to provide a simple upper mill stone crusher.

[Structure of the invention]

In order to achieve the above object, the first invention provides a rotating upper millstone mill that uses a rotating upper millstone and a fixed lower millstone to crush raw materials supplied into the gap between the rotating upper millstone and the fixed lower millstone. A ring gear is disposed below the bottom wall of the stand, and at least three rings are meshed with the ring gear.
A gap adjusting member of a size larger than 10 mm is screwed onto the bottom wall of the lower mill support, a spring is loaded between the upper end of the gap adjusting member and the bottom of the lower mill, and the lower mill is elastically supported by the spring. The second invention is characterized by the following:
In the invention, the grinding pressure adjusting shaft is screwed to the gap adjusting member, the upper end thereof is inserted into the shaft hole formed in the bottom of the lower mortar, and the upper end of the adjusting shaft is engaged with the stepped part of the upper end to restrict upward movement. The present invention is characterized in that a support plate is provided, and the spring is elastically loaded between the support plate and the gap adjustment member.

〔Example〕

Hereinafter, a detailed explanation will be given based on an embodiment shown in FIGS. 3 and 4.

A lower mill 23 is supported so as to be movable up and down on a support base 22 fixed to the upper part of the machine frame 20 via a bearing 21, and an upper mill 24 is rotatably provided above the lower mill 23.

The upper end of the main shaft 26 supported by an angular ball bearing 25 provided in the bearing part 21 is connected to the lower mill 2.
3 and is fixed to the upper part of the upper mill 24 via a connecting member 27, and the lower end passes through a base plate 20a provided horizontally on the machine frame 20 and protrudes below the pulley 2.
8 is provided so that the driving force of the motor 29 installed on the support plate 20a can be transmitted to the main shaft 26 via the belt 30.

A ring gear 31 having internal teeth 31 a is disposed below the bottom wall 22 a of the support base 22 so as to surround the bearing portion 21 and be concentric with the main shaft 26 . At least 33 female threads 32 are formed on the bottom wall 22a of the support base 22, concentrically with the main shaft 26 and spaced at equal intervals. External teeth 33b are screwed together and are movable in the axial direction of the main shaft 26, that is, in the vertical direction, and are formed on the lower outer periphery of the member 33.
meshes with the internal teeth 31a of the ring gear 31.
The gap adjustment members 33 are provided in at least three pieces, and in this embodiment, four pieces, so that the lower mill 23 can be raised and lowered evenly.

Female thread 3 formed inside the cylinder of the gap adjustment member 33
3c, the grinding pressure adjustment shaft 34 has its male thread 34
A seat plate 35 and a male thread 34 are screwed together so as to be movable in the vertical direction by a shaft 34, and are inserted through the lower end of the shaft 34.
Lock nut 36 screwed into ring gear 3
1 is supported on the bottom wall 22a of the support base 22, and the gear 31 is rotated by operating a gap adjustment handle 37 provided on the ring gear 31. Further, the upper end of the grinding pressure adjustment shaft 34 is inserted into a shaft hole 38 formed at the bottom of the lower mill 23, and is engaged with the upper end step 34b to limit vertical movement. A spring 40 is elastically loaded between the upper end of the adjustment member 33 and elastically supports the lower mill 23 on the support plate 39.

A raw material input port 41 is provided at the upper part of the upper mill 24, and the raw material supplied from the port 41 is fed into the upper mill 24.
The center is supplied through a passage 42 formed between the main shaft 26 and the periphery of the main shaft 26, and after being crushed in the gap between the lower mill 23 and the upper mill 24, it is taken out from the outlet 43 provided on the side of the lower mill 23. be done.

Next, the operation of the stone mill crusher will be explained.

First, the lower end of the crushing pressure adjustment shaft 34 is operated to rotate the shaft 34, and the male screw 34a and the clearance adjustment member 3 are rotated.
The shaft 34 is moved up and down by screwing with the female screw 33c of No. 3, and the distance between the upper end step 34b of the shaft 34b and the upper end of the gap adjustment member 33 is adjusted to change the elastic force of the compressed spring 40. , the grinding pressure is adjusted to correspond to the grade of the product, and the lock nut 36 is used to set it at a predetermined position.

Next, the gap adjustment handle 37 is operated to rotate the ring gear 31, and the inner teeth 31a and the outer teeth 33b are rotated.
The gap adjustment member 33 is rotated through the
The male thread 33a of No. 3 and the female thread 32 of the support base 22 are screwed together to move the member 33 up and down.
0. The lower mill 23 is raised and lowered via the support plate 36, and the gap between the two mills 23 and 24 is adjusted to obtain the desired pulverized material.

Then, by driving the motor 29, the belt 3
0. When the main shaft 26 is rotated via the pulley 28, the upper mill 24 rotates, and the raw material inputted from the raw material input port 41 is ground through the gap between the two mills 23 and 24, and then sent to the output port 43. taken out from

In this case, the main shaft 26 is an angular ball bearing 25.
Because it is supported by The drive unit can be continuously variable, and the drive unit can be integrated with the main body, reducing the installation area and making it movable.

Further, the ring gear 31 can also be used even if it has external teeth.

Furthermore, if the cover 44 of the upper mill 24 is made transparent, the grinding operation can be easily seen.

〔Effect of the invention〕

As described above, the present invention includes a spring between the lower mill and a plurality of gap adjustment members that move up and down in synchrony, and the spring resiliently supports the lower mill, so that the lower mill can be raised and lowered while keeping it horizontal. Since the gap between both dies is adjusted by adjusting the gap between the two dies, it is possible to handle both bottom and high-speed drive, and even if a foreign object is bitten, the lower dies can escape due to the spring, preventing damage to the dies. In addition, the crushing pressure adjustment shaft can preload the compressive force of the spring that elastically supports the lower mill, making it possible to obtain a wide range of crushing pressures, making it an excellent invention in practical use. .

[Brief explanation of drawings]

FIG. 1 is a cross-sectional front view of a conventional upper mill stone crusher, FIG. 2 is a cross-sectional front view of a lower mill stone crusher, and FIGS. 3 and 4 show an embodiment of the present invention. 3 is a cross-sectional front view of the upper mill stone crusher, and FIG. 4 is a cross-sectional view of the main parts. 20 is a machine frame, 21 is a bearing portion, 22 is a support stand, 2
2a is a bottom wall, 23 is a lower molar, 24 is an upper molar, 24 is an angular ball bearing, 26 is a main shaft, 31 is a ring gear, 31a is an internal tooth, 32 is a female thread, 33 is a gap adjustment member, 33a is a male thread, 33b is external tooth, 33c
34 is a female screw, 34 is a crushing pressure adjustment shaft, 34a is a male screw, 34b is an upper end step, 38 is a shaft hole, 39 is a support plate, and 40 is a spring.

Claims (1)

[Claims] 1. By means of a rotating upper mill and a fixed lower mill,
In an upper mill stone crusher that crushes raw materials supplied into the gap, a ring gear is arranged below the bottom wall of the lower mill support, and at least three or more gap adjustment members meshed with the ring gear are installed. An upper mill which is screwed onto the bottom wall of the lower mill support, and a spring is resiliently loaded between the upper end of the gap adjustment member and the bottom of the lower mill, and the lower mill is resiliently supported by the spring. Rotating stone mill crusher. 2. By means of a rotating upper mill and a fixed lower mill,
In an upper mill stone crusher that crushes raw materials supplied into the gap, a ring gear is arranged below the bottom wall of the lower mill support, and at least three gap adjustment members meshed with the ring gear are lowered. Screw the grinding pressure adjustment shaft into the bottom wall of the mortar support, insert the upper end of the grinding pressure adjustment shaft screwed into the gap adjustment member into the shaft hole formed in the bottom of the lower mortar, and insert the grinding pressure adjustment shaft into the upper end step of the grinding pressure adjustment shaft. An upper mill rotation type characterized in that a spring is elastically loaded between the support plate which is engaged to restrict upward movement and the upper end of the gap adjustment member, and the lower mill is resiliently supported by the spring. Stone crusher.