JP3244322U - Grindstone removal tool - Google Patents

Abstract

An object of the present invention is to provide a grindstone removal tool that increases the speed of grindstone replacement. The device has a main body 10 extending along the axial direction. A contact portion 11 is formed at one end of the main body, and an assembly portion 21 is formed at the other end of the main body. An assembly hole 23 for inserting a drive tool is formed in the assembly portion so as to be recessed inward along the axial direction. Two bosses 13 are formed on the abutment portion and protrude outward along the axial direction, and the two bosses are arranged symmetrically on the end face of the abutment portion and inserted into the insertion hole of the grindstone fastening block. installed and used to carry out grinding wheel removal operations. [Selection diagram] Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone removal tool, and more particularly to a grindstone removal tool for use in combination with an automatically driven tool.

In a typical grinding machine, a grinding wheel is mounted on the rotating shaft of the grinding machine, and then the grinding wheel is locked to the rotating shaft of the grinding machine using a fastening block, and the fastening block is pressed onto the grinding wheel for positioning. When removing a grindstone, the conventional method is to use a wrench with two protruding bosses on the end, insert the two bosses into the insertion holes made in the fastening block, and manually apply force to the wrench. After the fastening block is rotated to loosen it from the rotating shaft of the polishing machine, the grinding wheel is removed.

However, conventionally, wrenches for removing grinding wheels can only be driven by hand-holding the handle, cannot be used in combination with automatic drive tools (e.g., pneumatic or electric wrenches), and are difficult to operate. Disadvantages have existed for many years: it is cumbersome, labor-intensive, and the speed of changing the grinding wheel is slow.

Therefore, the inventor of the present invention believed that the above-mentioned drawbacks could be improved, and as a result of intensive studies, he came up with the proposal of the present invention, which effectively improves the above-mentioned problems through rational design.

The present invention has been made in view of such conventional problems. In order to solve the above-mentioned problems, the main object of the present invention is to provide a grindstone removal tool that can be used in combination with an automatically driven tool and can significantly speed up the replacement speed of the grindstone.

In order to solve the above problems, the present invention employs the following means.
A grindstone removal tool according to one aspect of the present invention has a main body extending along the axial direction and having a hollow cylindrical shape, an abutting part is formed at one end of the main body, and an abutting part is formed at the other end of the main body. An assembly part is formed coaxially with the abutment part, and an assembly hole for inserting a driving tool is formed in an end surface of the assembly part so as to be recessed inward along the axial direction, and Two bosses protruding outward along the axial direction are formed on the end face of the abutment part, and the two bosses have bodies arranged symmetrically on the end face of the abutment part.

Preferably, the outer diameter of the abutment part is larger than the outer diameter of the assembly part, and a neck part constituted by a concave curved part is formed at a connection point between the abutment part and the outer peripheral surface of the assembly part. ing.

Preferably, a hole communicating with the assembly hole is formed at the center of the end face of the abutting part, the end face of the abutting part has a hollow annular shape, and the end face of the abutting part extends from the outer edge thereof. A radial width toward the inner edge is larger than an outer diameter of the two bosses, and a contact surface is formed on a circumferential side where the end face of the contact portion and the two bosses are connected. Further, a connection hole is connected between the hole and the assembly hole, both ends of the connection hole communicate with the hole and the assembly hole, and the diameter of the connection hole is equal to the diameter of the hole. An annular rib is formed on the inner edge of the main body, the rib having a diameter smaller than that of the assembly hole, and having an annular shape between the hole and the assembly hole.

FIG. 1 is an external perspective view showing a grindstone removal tool according to an embodiment of the present invention. FIG. 2 is an external perspective view of a grindstone removal tool according to an embodiment of the present invention, seen from another angle. 1 is a schematic cross-sectional view showing a grindstone removal tool according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram showing a horizontal structure of a contact portion of a grindstone removal tool according to an embodiment of the present invention. 1 schematically shows how a grindstone removal tool according to an embodiment of the present invention is used. 3 schematically shows another usage state of the grindstone removal tool according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 6. Note that the present invention is not limited to the embodiments described below, and may take various forms as long as they fall within the technical scope of the present invention.

First, an embodiment of a grindstone removal tool according to the present invention will be described with reference to FIGS. 1 to 5.
The grindstone removal tool according to the present invention has a main body 10 that is integrally extended mainly along the axial direction and has a hollow cylindrical shape. A contact part 11 is formed at one end of the main body 10 so as to expand outward, and an assembly part 21 is formed at the other end of the main body 10 and is disposed coaxially with the contact part 11. The part 11 and the assembly part 21 have end faces 12 and 22, respectively, which are installed in opposite directions, and the outer diameter D1 of the abutment part 11 is larger than the outer diameter D2 of the assembly part 21, and the abutment part 11 and the outer circumferential surface of the assembly portion 21, a neck portion 31 consisting of a concave curved portion is formed. The neck portion 31, whose outer circumferential surface is composed of a concave curved portion, evenly releases the stress generated at the connection point between the contact portion 11 and the assembly portion 21, thereby preventing stress from being excessively concentrated. It prevents The end surface 22 of the assembly section 21 has a concave curved shape toward the inside, and a corresponding driving tool is inserted into the center position of the end surface 22 of the assembly section 21 so as to be concave toward the inside along the axial direction. An assembly hole 23 is formed for the abutting part 11, and two bosses 13 protruding outward along the axial direction are formed on the end surface 12 of the abutting part 11. The two bosses 13 are arranged 180 degrees symmetrically on the end face 12 and are used to insert the grindstone fastening block into the insertion hole (not shown). Preferably, the two bosses 13 are constituted by cylindrical bodies of the same size projecting integrally from the end surface 12 of the contact portion 11, and chamfers 131 are formed along the edges of the two bosses 13, respectively. This makes it easy to insert the two bosses 13.

Further, the abutting part 11 has a hole 14 in the center of its end face 12, which communicates with the assembly hole 23, and the end face 12 of the abutting part 11 has a hollow annular shape. Further, as shown in FIG. 4, the radial width L1 from the outer edge to the inner edge of the end surface 12 of the abutment part 11 is larger than the outer diameter D3 of the two bosses 13, and the two bosses 13 are connected to the abutment part. A contact surface 121 is disposed between the outer edge and the inner edge of the end surface 12 of the contact portion 11 and is formed on the circumferential side where the end surface 12 of the contact portion 11 and the two bosses 13 are connected. By doing this, when the two bosses 13 are inserted into the insertion holes of the grindstone fastening block, the contact surfaces 121 of the bosses 13 are affixed to the grindstone fastening block, thereby providing a more stable support effect. However, during the process of removing the whetstone, the whetstone no longer swings, making it even more stable. Further, a connection hole 32 is connected between the hole 14 and the assembly hole 23, and both ends of the connection hole 32 are communicated with the hole 14 and the assembly hole 23, respectively. The aperture C1 of the connection hole 32 is smaller than the aperture C2 of the hole 14 and the aperture C3 of the assembly hole 23, and an annular ring is formed on the inner edge of the main body 11 between the hole 14 and the assembly hole 23. A rib 33 exhibiting a shape is formed. This solves the problem that the main body 11 has a thick structure at the connection hole 32, and the wall between the hole 14 and the assembly hole 23 is too thin and easily deforms when subjected to force. This effectively increases the structural strength of the main body 10 as a whole.

When the present invention constructed with the above-described structure is actually used (see FIG. 5), the assembly hole 23 opened in the assembly section 21 of the main body 10 allows automatic drive tools such as electric wrench or pneumatic wrench to be attached. By directly assembling the 41 drive heads 42, the user can directly drive the main body 10 to rotate with these automatic driving tools 41, and synchronize the boss 13 on the abutment part 11 of the main body 10 to rotate. The objective is to quickly and labor-savingly remove the grinding wheel. As can be seen from FIG. 5, in practical application, the present invention can be quickly attached to automatic drive tools 41 of different size specifications by connecting rods 43 or adapters 44. For example, the assembly hole 23 of the present invention is composed of a square hole, and the size of the assembly hole 23 is 1/4 inch (so-called 2 minutes), 3/8 inch (so-called 3 minutes), or 1/2 inch (so-called 4 minutes). minutes). Therefore, by using a commercially available adapter 44 that converts from 3 minutes to 4 minutes or an adapter 44 that converts from 2 minutes to 3 minutes, it is possible to achieve the effect of easily and quickly attaching it to drive tools of different specifications, and it has high practicality. ing.

Furthermore, the grindstone removal tool according to the present invention is not limited to being driven by the automatic drive tool 41, and as shown in FIG. The grindstone removal tool according to the present invention has a function of rotating in one direction, making the operation more convenient. In this way, the present invention allows users to select and drive automatic or manual driving tools by themselves, meeting the different needs of users and having extremely high convenience.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the embodiments described above. It is clear from the description of the claims of the utility model registration that forms with such changes or improvements may also be included within the technical scope of the present invention.

10 Main body 11 Contact portion 12 End surface 121 Contact surface 13 Boss 131 Chamfer 14 Hole portion 21 Assembly portion 22 End surface 23 Assembly hole 31 Neck portion 32 Connection hole 33 Rib 41 Automatic drive tool 42 Drive head 451 Drive head 43 Connection rod 44 Adapter 45 Manual ratchet wrench D1 Outer diameter D2 Outer diameter D3 Outer diameter C1 Bore C2 Bore C3 Bore L1 Radial width

Claims (6)

A main body extending along an axial direction and having a hollow cylindrical shape, an abutting part is formed at one end of the main body, and an assembly disposed coaxially with the abutting part at the other end of the main body. An assembly hole for inserting a driving tool is formed on the end surface of the abutment portion so as to be recessed inward along the axial direction, and an assembly hole is formed on the end surface of the abutment portion so as to be recessed inward along the axial direction. A grindstone removal tool, characterized in that two bosses projecting outward are formed, and the two bosses each include a main body that is symmetrically arranged on an end surface of the abutting portion. The outer diameter of the abutting part is larger than the outer diameter of the assembly part, and a neck part constituted by a concave curved part is formed at a connection point between the abutting part and the outer peripheral surface of the assembly part. The grindstone removal tool according to claim 1, characterized in that: The two bosses are configured by cylindrical bodies of the same size projecting integrally from the end face of the contact portion, and the two bosses have chamfers formed on their edges, respectively. The grindstone removal tool described in item 1. A hole communicating with the assembly hole is provided at the center of the end face of the abutting part, the end face of the abutting part has a hollow annular shape, and the end face of the abutting part extends from its outer edge to its inner edge. A radial width is larger than an outer diameter of the two bosses, and a contact surface is formed on each circumferential side where the end face of the contact portion and the two bosses are connected. The grindstone removal tool described in 1. A hole communicating with the assembly hole is provided at the center of the end surface of the abutting portion, a connection hole is connected between the hole and the assembly hole, and both ends of the connection hole are connected to the assembly hole. The connection hole is in communication with the hole and the assembly hole, the diameter of the connection hole is smaller than the diameter of the hole and the assembly hole, respectively, and the inner edge of the main body has a hole between the hole and the assembly hole. The grindstone removal tool according to claim 1, characterized in that a rib having an annular shape is formed. The grindstone according to claim 1, wherein the assembly hole is a square hole, and the size of the assembly hole is one of 1/4 inch, 3/8 inch, and 1/2 inch. Removal tool.