Manual grinding device

Abstract

The utility model belongs to the technical field of grinding tools, and particularly discloses a manual grinding device which comprises a mortar and a pestle, the pestle comprises a grab handle and a pestle head, the mortar comprises a mortar body, and a protrusion is fixedly arranged in the center of the bottom face of the mortar body. The outer surface of the bulge is in arc transition with the bottom surface of the mortar body; the pestle head is composed of first to fourth grinding balls, the grinding pestle further comprises first to fourth connecting rods, and the grab handles are connected with the first to fourth grinding balls through the first to fourth connecting rods in a one-to-one correspondence manner; during grinding, the first grinding ball and the second grinding ball are tangent to the outer surface of the bulge, and the third grinding ball and the fourth grinding ball are tangent to the inner wall of the mortar body; the first to fourth grinding balls are combined in the grinding area of the bottom surface of the mortar body and cover the bottom surface of the mortar body; and the mortar and the pestle are detachably and rotatably connected. According to the utility model, the grinding uniformity can be improved, the grinding difficulty is reduced, the grinding time is saved, and the device is suitable for manual grinding.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding tools and relates to a manual grinding device. Background Art

[0002] In the shoemaking process, resin and other materials are often used as raw materials for making rubber. Before mixing the resin with other raw materials, the resin should be fully ground to improve its dispersibility. In the mass production stage, the grinding process is completed by a grinder, while in the experimental stage, the grinding of experimental samples still needs to be completed manually by the designer.

[0003] like Figure 1 and Figure 2 As shown, a manual grinding device used by designers in the prior art includes a mortar and a pestle. The bottom surface of the mortar is flat, and the mortar wall presents a certain curvature. When grinding, the raw material is first placed in the mortar, and then the pestle is inserted into the mortar. The raw material is ground while the pestle head is grinding with the bottom surface of the mortar or the mortar wall.

[0004] The use of the above manual grinding device has the following technical problems: during the grinding process, the position of the raw material in the mortar is constantly changing, and the grinding position of the pestle head needs to be changed irregularly and continuously, which is not only time-consuming and labor-intensive, but also very likely to result in insufficient and uneven grinding. Summary of the invention

[0005] The purpose of the utility model is to provide a manual grinding device to improve grinding uniformity, reduce grinding difficulty and save grinding time.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0007] A manual grinding device comprises a mortar and a pestle, wherein the pestle comprises a handle and a pestle head, and the mortar comprises a mortar body, wherein a protrusion is fixedly arranged at the center of the bottom surface of the mortar body; and the outer surface of the protrusion forms an arc transition with the bottom surface of the mortar body;

[0008] The pestle head is composed of first to fourth grinding balls, and the pestle also includes first to fourth connecting rods, and the handle is connected to the first to fourth grinding balls through the first to fourth connecting rods respectively in a one-to-one correspondence;

[0009] During grinding, the first grinding ball and the second grinding ball are tangent to the outer surface of the protrusion, and the third grinding ball and the fourth grinding ball are tangent to the inner wall of the mortar body;

[0010] The first to fourth grinding balls have a grinding area on the bottom surface of the mortar body, which covers the bottom surface of the mortar body;

[0011] The mortar and pestle are detachably and rotatably connected.

[0012] As a limitation, the mortar also includes a mortar cover, the first to fourth connecting rods are fixedly connected to the handle through a vertical rod, and a through hole for allowing the vertical rod to pass through is opened in the center of the mortar cover.

[0013] As a second limitation, the first to fourth connecting rods are fixedly connected to the handle via a vertical rod, and a groove matching the top of the protrusion is provided at the bottom end of the vertical rod.

[0014] As a third limitation, the first to fourth grinding balls have the same radius.

[0015] As a fourth limitation, a line connecting the centers of the first grinding ball and the second grinding ball is perpendicular to a line connecting the centers of the third grinding ball and the fourth grinding ball.

[0016] As the utility model adopts the above technical solution, compared with the prior art, the technical progress achieved is:

[0017] (1) The pestle head of the utility model is provided with four grinding balls, and a protrusion is provided in the center of the bottom surface of the mortar body. The first grinding ball and the second grinding ball are tangent to the outer surface of the cover protrusion, and the third grinding ball and the fourth grinding ball are tangent to the inner wall of the mortar body. The four grinding balls rotate to generate shear force to play a grinding role; at the same time, the union of the grinding areas of the first to fourth grinding balls on the bottom surface of the mortar body covers the bottom surface of the mortar body; it can improve the grinding uniformity, reduce the grinding difficulty, and save the grinding time;

[0018] (2) The utility model limits the lateral displacement of the pestle by providing a through hole in the center of the mortar cover or by matching the protrusion with the groove, so that a rotational matching relationship is formed between the mortar and the pestle, thereby improving the convenience of use and the grinding efficiency;

[0019] (3) In the present invention, the radii of the first to fourth grinding balls are the same, which ensures that the shear force of each grinding ball is the same during grinding, thereby improving the uniformity of grinding;

[0020] (4) In this embodiment, the line connecting the centers of the first grinding ball and the second grinding ball is perpendicular to the line connecting the centers of the third grinding ball and the fourth grinding ball, so that the four grinding balls are evenly distributed in the same plane, thereby improving the uniformity of grinding.

[0021] The utility model belongs to the technical field of grinding tools, can improve grinding uniformity, and at the same time reduce grinding difficulty and save grinding time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0023] In the attached picture:

[0024] Figure 1 It is a structural schematic diagram of a manual grinding device in the prior art of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the mortar in the prior art of the utility model;

[0026] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the mortar body of Embodiments 1 and 2 of the present utility model;

[0028] Figure 5 It is a top view of the first to fourth grinding balls in Examples 1 and 2 of the present utility model located in the mortar body;

[0029] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of the present utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the pestle in Example 2 of the utility model.

[0031] In the figure: 1, mortar, 11, mortar body, 111, protrusion, 12, mortar cover, 2, pestle, 21, handle, 22, pestle head, 221, first grinding ball, 222, second grinding ball, 223, third grinding ball, 224, fourth grinding ball, 23, vertical rod, 231, groove, 24, horizontal rod. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0033] Example 1 Manual grinding device

[0034] like Figures 3 to 5 As shown, this embodiment includes a mortar 1 and a pestle 2, the pestle 2 includes a handle 21 and a pestle head 22, the mortar 1 includes a mortar body 11, and a protrusion 111 is fixedly provided at the center of the bottom surface of the mortar body 11; the outer surface of the protrusion 111 transitions with the bottom surface of the mortar body 11 in an arc.

[0035] The pestle head 22 is composed of first to fourth grinding balls 221 to 224. The pestle 2 further includes first to fourth connecting rods. The handle 21 is respectively connected to the first to fourth grinding balls 221 to 224 through the first to fourth connecting rods in a one-to-one correspondence. During the grinding process, the first grinding ball 221 and the second grinding ball 222 are tangent to the outer surface of the protrusion 111, and the third grinding ball 223 and the fourth grinding ball 224 are tangent to the inner wall of the mortar body 11. In this way, it can be ensured that during the grinding process, the first grinding ball 221 and the second grinding ball 222 are exactly tangent to the outer surface of the protrusion 111 to form a shearing force, and the third grinding ball 223 and the fourth grinding ball 224 are tangent to the inner wall of the mortar body 11 to form a shearing force, ensuring the sufficiency of grinding.

[0036] It can be seen that the relative positions of the four grinding balls are fixed and they can only grind within a fixed area in the mortar body 11. Therefore, in this embodiment, the ball radii of the first to fourth grinding balls 221 to 224 are reasonably adjusted so that the union of the grinding areas of the four on the bottom surface of the mortar body 11 covers the bottom surface of the mortar body 11, which can ensure the sufficiency and uniformity of grinding.

[0037] The mortar 1 and the pestle 2 are detachably and rotatably connected. Specifically, as Figure 3 shown, in this embodiment, the mortar 1 further includes a mortar cover 12. The first to fourth connecting rods are fixedly connected to the handle 21 through a vertical rod 23. A through hole for the vertical rod 23 to pass through is provided in the center of the mortar cover 12. Specifically, the first to fourth connecting rods are all L-shaped rods. The bottom ends of the first to fourth connecting rods are respectively fixedly connected to the corresponding grinding balls, and the other ends of the four are fixedly connected to the bottom end of the vertical rod 23. The other end of the vertical rod 23 is fixedly connected to the handle 21 through a cross rod 24.

[0038] Furthermore, in this embodiment, the radii of the first to fourth grinding balls 221 to 224 are the same. The line connecting the centers of the first grinding ball 221 and the second grinding ball 222 is perpendicular to the line connecting the centers of the third grinding ball 223 and the fourth grinding ball 224. That is to say, the first connecting rod and the second connecting rod, and the third connecting rod and the fourth connecting rod respectively form connecting rods with an inverted "凵" - shaped longitudinal section, and the horizontal parts of the two inverted "凵" - shaped connecting rods are perpendicular. It is not difficult to see from the above description that the horizontal lengths of the first connecting rod and the second connecting rod are less than the horizontal lengths of the third connecting rod and the fourth connecting rod.

[0039] When in use, first place the raw material to be ground in the mortar body 11, then extend the pestle 2 into the mortar body 11, cover the mortar body 11 with the mortar cover 12, rotate the handle 21, drive the first to fourth connecting rods through the vertical rod 23, and then drive the first to fourth grinding balls 221 to 224 to grind. During the grinding process, shear force is formed between the first grinding ball 221, the second grinding ball 222 and the protrusion 111, the third grinding ball 223, the fourth grinding ball 224 and the inner wall of the mortar body 11, and the first to fourth grinding balls 221 to 224 and the bottom surface of the mortar body 11, which play a grinding role.

[0040] Example 2 Manual grinding device

[0041] like Figures 4 to 6 As shown, the structure of this embodiment is substantially the same as that of embodiment 1. The difference is that, Figure 7 As shown, in this embodiment, the bottom end of the vertical rod 23 is provided with a groove 231 adapted to the top of the protrusion 111. The adaptation here means that the top of the protrusion 111 can just extend into the groove 231, and the pestle 2 can rotate with the protrusion 111 as a fulcrum under the drive of the handle 21.

[0042] With such arrangement, the present embodiment does not need to rely on the through holes on the mortar cover 12 to limit the horizontal displacement of the pestle 2, nor does it need the mortar cover 12 to provide a rotation fulcrum.

[0043] The method of use of this embodiment is substantially the same as that of the first embodiment, except that when the handle 21 drives the first to fourth grinding balls 221 to 224 to rotate, the protrusion 111 cooperates with the groove 231 at the bottom of the vertical rod 23 to provide a rotation fulcrum.

Claims

1. A manual grinding device, comprising a mortar and a pestle, wherein the pestle comprises a handle and a pestle head, wherein: The mortar comprises a mortar body, and a protrusion is fixedly arranged at the center of the bottom surface of the mortar body; the outer surface of the protrusion and the bottom surface of the mortar body are in an arc transition; The pestle head is composed of first to fourth grinding balls, and the pestle also includes first to fourth connecting rods, and the handle is connected to the first to fourth grinding balls through the first to fourth connecting rods respectively in a one-to-one correspondence; During grinding, the first grinding ball and the second grinding ball are tangent to the outer surface of the protrusion, and the third grinding ball and the fourth grinding ball are tangent to the inner wall of the mortar body; The first to fourth grinding balls have a grinding area on the bottom surface of the mortar body, which covers the bottom surface of the mortar body; The mortar and pestle are detachably and rotatably connected.

2. The manual grinding device according to claim 1, characterized in that: The mortar also includes a mortar cover. The first to fourth connecting rods are fixedly connected to the handle through a vertical rod. A through hole for allowing the vertical rod to pass through is provided in the center of the mortar cover.

3. The manual grinding device according to claim 1, characterized in that: The first to fourth connecting rods are fixedly connected to the handle via a vertical rod, and a groove matching the top of the protrusion is arranged at the bottom end of the vertical rod.

4. The manual grinding device according to claim 1, characterized in that: The first to fourth grinding balls have the same radius.

5. The manual grinding device according to any one of claims 1 to 4, characterized in that: The line connecting the centers of the first grinding ball and the second grinding ball is perpendicular to the line connecting the centers of the third grinding ball and the fourth grinding ball.

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