CN220427969U - Combined sand disc of polishing tool - Google Patents

Abstract

The utility model relates to a grinding tool combined sand disc, and belongs to the technical field of electric tools. The combined sand disc comprises a clamping handle, a tray body and a sand polishing piece, wherein the clamping handle comprises a shaft handle body at the upper part and a seat body with a vertical counter bore at the lower part; the seat body is provided with external threads and vertical counter bore internal threads, wherein the external diameter of the external threads is larger than that of the shaft handle body; the tray body is in a horn shape and is screwed and connected with the external thread of the seat body through the internal thread of the central hole; the polishing piece is connected with the internal thread of the seat body in a screwing way through an external threaded rod with the middle part extending upwards. After the utility model is adopted, the clamping handle and the internal thread connected with the abrasive sheet are integrally designed, so that good concentricity is easy to ensure; and the tray bodies with various specifications share the threaded connection structure, so that the cost is low, and the replacement is convenient and quick.

Description

Combined sand disc of polishing tool

Technical Field

The utility model relates to a sand disc for polishing, in particular to a combined sand disc for a polishing tool, and belongs to the technical field of tools.

Background

Hand-held sanders, and the like are commonly used workpiece surface sanding tools. When in use, the rotary tool head driven by a power source such as a motor clamps sand discs with different specifications, such as 1 inch sand disc, 2 inch sand disc and 3 inch sand disc according to the requirements. For a long time, the sand disc has an integral structure and a split structure. The clamping handle, the tray body and the abrasive sheets of the former are integrally manufactured, so that the abrasive sheets are required to be integrally replaced after being worn or when the abrasive sheets with different specifications are replaced according to requirements, and waste is caused; and the clamping handle and the clamping head nut which are locked must be loosened during disassembly and replacement, which is troublesome. The clamping handle, the tray body and the abrasive sheet can be separated, and the concentricity is difficult to ensure due to the fact that the clamping handle is in threaded connection with the tray body, the radial runout is large, so that large vibration is brought, and the nut is required to be fastened by means of a tool, so that inconvenience is caused.

Disclosure of Invention

The utility model aims at: aiming at the defects existing in the prior art, the polishing tool combined sand disc is good in universality, convenient to assemble and disassemble, easy to control concentricity and vibration and economical in cost.

In order to achieve the above purpose, the basic technical scheme of the polishing tool combination sand table of the utility model is as follows: the polishing device comprises a clamping handle, a tray body and a polishing sheet, wherein the clamping handle comprises a shaft handle body at the upper part and a seat body with a vertical counter bore at the lower part; the seat body is provided with external threads with the outer diameter larger than that of the shaft handle body and internal threads in the vertical counter bore;

the tray body is in a horn shape and is screwed and connected with the external thread of the seat body through the internal thread of the central hole;

the polishing piece is connected with the internal thread of the seat body in a screwing way through an external threaded rod with the middle part extending upwards.

The beneficial effects are that: after the utility model is adopted, the clamping handle and the internal thread connected with the abrasive sheet are integrally designed, so that good concentricity is easy to ensure; and the tray bodies with various specifications share the threaded connection structure, so that the cost is low, and the replacement is convenient and quick.

The utility model is further perfected as follows: the seat body is provided with a limit flange which radially extends from the upper end.

The utility model is further perfected as follows: the external thread and the internal thread are both double-ended threads.

The utility model is still further perfected as follows: the metal seat core body with the double-head internal thread vertical counter bores is embedded in the seat body.

The utility model is further perfected as follows: the main body of the tray body is embedded with a tray core body with an internal thread central hole.

The utility model is further perfected as follows: the lower surface of the main body of the tray body is of a concave structure, and a positioning concave ring is arranged at the internal thread port of the central hole; the root of the externally threaded rod of the polishing sheet is provided with a positioning convex ring matched with the positioning concave ring.

Drawings

The utility model is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a first embodiment of the present utility model.

Fig. 2 is a schematic perspective exploded view of the embodiment of fig. 1.

Fig. 3 is a schematic diagram of a three-dimensional splitting structure according to a second embodiment of the present utility model.

Fig. 4 is a schematic cross-sectional structure of fig. 3.

Fig. 5 is a schematic diagram of a three-dimensional splitting structure according to a third embodiment of the present utility model.

Fig. 6 is a schematic cross-sectional structure of fig. 5.

Detailed Description

Example 1

The polishing tool combination sand disc of the embodiment is applied to an angular sand mill, has a structure shown in fig. 1 and 2, and mainly comprises a clamping handle 1, a tray body 2 and a sand polishing sheet 3. The clamping handle 1 comprises a shaft handle body 1-1 at the upper part and a seat body 1-4 with a vertical counter bore 1-3 at the lower part. The seat body 1-4 is provided with a limit flange 1-2 which radially extends out of the upper end, and double-head external threads with the outer diameter larger than that of the shaft handle body 1-1, and the orifice of the vertical counter bore 1-3 is provided with double-head internal threads. Therefore, when the screw is screwed with the matching piece, the screw is rapid and quick, and the concentricity is easy to ensure due to good symmetry, thereby being beneficial to eliminating vibration.

The main body 2-1 of the tray body 2 is horn-shaped, is provided with a central hole 2-2 with internal threads, and is screwed and connected with the external threads of the seat body 1-4 through the internal threads. The middle part of the sand sheet body 3-1 of the sand sheet 3 extends upwards to form an external threaded rod 3-2, and is screwed and connected with the internal threads of the seat body 1-4 through the external threaded rod.

The large-sized abrasive sheet 3 shown in fig. 3 and 4 or the small-sized abrasive sheet 3 shown in fig. 5 and 6 can be replaced conveniently by means of the universal clamping handle 1 when necessary. Compared with the integral structure in the prior art, when the tray bodies with different sizes are required to be replaced, the locked clamping handle and the clamping head nut do not need to be loosened, and the tray bodies can be directly screwed by hands so as to be quickly replaced; due to the integrated design of the internal thread and the clamping handle connected with the abrasive sheet, the tray bodies with different sizes can share the internal thread, thereby saving the cost. Compared with the split structure in the prior art, the integrated design of the internal threads of the clamping handle and the abrasive sheet ensures good concentricity; the split structure adopts the thread connection with a gap at the central shaft handle part, and under the condition of no additional radial and axial precise positioning, large deflection is easily caused, so that the vibration problem is caused. When the tray bodies with different sizes need to be replaced, the internal threads connected with the abrasive sheet do not need to be replaced, and each tray body in the split type structure is additionally provided with an internal thread piece.

Example two

The polishing tool combination sand table of the present embodiment is shown in fig. 3 and 4, and has the same basic structure as the first embodiment, but with the difference that the complete design structure which needs further explanation is that

The metal seat core body 1-4' of the double-head internal thread vertical counter bore 1-3 is embedded in the seat body 1-4 of the clamping handle 1, so that a large grinding sheet with 3 inches is convenient to directly connect, and the large area grinding work is performed more quickly and efficiently. The main body 2-1 of the tray body 2 is embedded with the tray core 2-2' with the internal thread central hole 2-2, which is more convenient for quick connection with the clamping handle. And the lower surface of the main body 2-1 of the tray body 2 is provided with a concave 2-4, and the internal thread port of the central hole 2-2 is provided with a positioning concave ring 2-3. The abrasive sheet 3 is exemplified by a large specification, and the root of the external threaded rod 3-2 is provided with a positioning convex ring 3-3 matched with the positioning concave ring 2-3. It will be appreciated that the mounting structure of the organic combination of the internal and external spirals ensures the reliability and stability of the installation of the large abrasive sheet.

Example III

As shown in fig. 5 and 6, when the small-size 1 inch abrasive sheet 3 is installed, the external threaded rod 3-2 of the abrasive sheet 3 is directly screwed with the internal threads of the base body 1-4 of the clamping handle 1, and the tray body 2 is not needed.

The specific structure of the clamping handle 1 is the same as that of the embodiment. The sand sheet body 3-1 of the sand sheet 3 is fixedly connected to the bottom surface of the sand base 3-4 in a bonding way, and the upper surface of the sand base 3-4 is embedded with an upward extending external threaded rod 3-2. Because the 1 cun abrasive sheet is applicable to the occasion that work area is narrow and small, not assembling the tray body can avoid the sight to be stopped by unnecessary, makes the operator more easily direct observation polishing area.

In addition to the embodiments described above, other embodiments of the utility model are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the utility model.

Claims (6)

1. The utility model provides a milling tool combination sand table, includes grip handle, tray body and dull polish piece, its characterized in that: the clamping handle comprises a shaft handle body at the upper part and a seat body with a vertical counter bore at the lower part; the seat body is provided with external threads with the outer diameter larger than that of the shaft handle body and internal threads in the vertical counter bore;

the tray body is in a horn shape and is screwed and connected with the external thread of the seat body through the internal thread of the central hole;

the polishing piece is connected with the internal thread of the seat body in a screwing way through an external threaded rod with the middle part extending upwards.

2. The sanding tool kit of claim 1, wherein: the seat body is provided with a limit flange which radially extends from the upper end.

3. The sanding tool kit of claim 2, wherein: the external thread and the internal thread are both double-ended threads.

4. A sanding tool kit as defined in claim 3, wherein: the metal seat core body with the double-head internal thread vertical counter bores is embedded in the seat body.

5. A sanding tool kit as defined in claim 3, wherein: the main body of the tray body is embedded with a tray core body with an internal thread central hole.

6. The sanding tool kit of any one of claims 1 to 5, wherein: the lower surface of the main body of the tray body is of a concave structure, and a positioning concave ring is arranged at the internal thread port of the central hole; the root of the externally threaded rod of the polishing sheet is provided with a positioning convex ring matched with the positioning concave ring.