External corner polishing tool

Abstract

The utility model discloses an external corner polishing tool which comprises a hinge shaft, the left side and the right side of the hinge shaft are respectively hinged with a base plate, the opposite faces of the two base plates are jointly connected with a deformable arc-shaped plate in a sliding mode, the hinge shaft is connected with a transmission rod in a threaded mode, and the front end of the transmission rod penetrates through the hinge shaft and then is connected with the arc-shaped plate in a rotating mode. The tool solves the problem that polishers of various specifications need to be prepared during elevation polishing in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power construction, and particularly relates to an external corner grinding tool. Background Art

[0002] The external corner grinding tool is the main trimming tool for the external corners of walls. Since there are various specifications for the wall corners (45-degree angle, 60-degree angle, 75-degree angle), the existing external corner grinding tools can only achieve grinding and trimming at one angle, and have poor versatility. Patent CN221461731 U discloses an elevation angle grinding tool with adjustable angle. By adjusting the distance between two rotating plates, the angle can be adjusted. The rotating plates are clamped with scraping plates or inserting strips. By replacing different scraping plates and inserting strips, the grinding work for the external corners of right angles and arc angles can be satisfied. Moreover, by providing a first rotating plate and a second rotating plate that are pivotally connected to each other, the grinding of external corners at different angles can also be satisfied. Although only one set of rotating plates is needed in this structure, a variety of inserting strips still need to be prepared to meet the grinding requirements for wall corners with different arc angles. Every time a wall corner with different dimensions is encountered, the inserting strips need to be adjusted and replaced again, which is cumbersome and not convenient enough. Content of the Utility Model

[0003] In view of the above problems, the utility model discloses an external corner grinding tool, which solves the problem of preparing grinding tools with various specifications during elevation angle grinding in the prior art.

[0004] An external corner grinding tool includes a hinge shaft. On the left and right sides of the hinge shaft, a substrate is hinged respectively. On the opposite sides of the two substrates, a deformable arc plate is slidably connected. The hinge shaft is threadedly connected with a transmission rod. The front end of the transmission rod passes through the hinge shaft and then is rotatably connected with the arc plate.

[0005] Preferably, a chute is arranged on each substrate, and a slider slidably connected with the chute is arranged on the arc plate.

[0006] Preferably, the slider and the arc plate are connected through a universal coupling.

[0007] Preferably, the chute is a T-shaped groove, and the slider is a T-shaped slider matching with the T-shaped groove.

[0008] Preferably, a rotating seat is arranged on the side of the arc plate close to the substrate, and the front end of the transmission rod is rotatably connected with the rotating seat.

[0009] Preferably, the center of the rotating seat is located at the center of the arc plate, and the arc plate is arranged symmetrically about the hinge shaft left and right.

[0010] Preferably, the axis of the transmission rod and the axis of the hinge shaft are perpendicularly arranged.

[0011] Preferably, the arc-shaped plate is an elastic plate.

[0012] Beneficial effects

[0013] In the utility model, the slider connected by the arc-shaped plate is slidably connected to both of the mutually hinged bases. At the same time, the arc-shaped plate is in transmission connection with the hinge shaft through a transmission rod, so as to realize the adjustment of the opening radian at both ends of the arc-shaped plate, and the grinding and trimming of external corners with different angles can be realized without preparing multiple molds. Brief description of the drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0015] Figure 1 is the three-dimensional view of the overall structure of the present utility model Figure 1 ;

[0016] Figure 2 is the three-dimensional view of the overall structure of the present utility model Figure 2 ;

[0017] Figure 3 is the top view of the overall structure of the present utility model;

[0018] Figure 4 is Figure 3 the view in the direction of A in

[0019] Figure 5 is Figure 4 the enlarged view of B in

[0020] In the figure, 1, left base plate; 2, arc-shaped plate; 3, right base plate; 4, hinge shaft; 5, transmission rod; 6, rotating seat; 7, T-shaped slider; 8, universal coupling. Specific embodiments

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as limiting the present utility model.

[0022] As Figures 1-5As shown, the present utility model discloses an external corner grinding tool. The tool includes a hinge shaft 4 located in the middle. The left substrate 1 is hinged to the left side of the hinge shaft, and the right substrate 3 is hinged to the right side of the hinge shaft. T-shaped chutes are machined on the opposite sides of the two substrates, and T-shaped sliders 7 are fitted in the chutes. A threaded hole perpendicular to the axis of the hinge shaft is machined in the central part of the hinge shaft, and a transmission rod 5 is threadedly connected in the threaded hole. The rear end of the rotating rod is processed into a swollen shape, and patterns are machined on the surface for easy grasping and operation.

[0023] Two universal couplings 8 are symmetrically installed on the rear side of the arc-shaped plate 2 with respect to the left-right center line. The other end of each universal coupling is connected to the corresponding T-shaped slider. A rotating seat 6 is installed at the center of the arc-shaped plate 2, and the front end of the transmission rod 5 extends into the rotating seat and is rotatably connected to the rotating seat. The specific connection method can be that a cylindrical rotating block that can rotate around the central axis of the rotating seat is pre-embedded in the rotating seat. A through hole in the horizontal direction is machined at the center of the rotating block, a threaded hole is machined on the side of the rotating block, a threaded hole or a tightening groove is machined on the side of the rotating rod 5. After the front end of the rotating rod 5 extends into the through hole of the rotating block, a set screw passes through the threaded hole on the rotating block to tighten the rotating rod 5. It can also be that a threaded hole is directly machined at the center of the rotating block, and a screw rod matching the threaded hole is machined at the front end of the rotating rod, and the rotating block and the rotating rod are connected by threads.

[0024] The arc-shaped plate 2 is an elastic plate, and a grinding tool such as sandpaper is bonded to the side of the elastic plate away from the base. Chamfers are machined at both ends of the arc-shaped plate 2, and the arc-shaped plate is fitted with the left and right substrates through the chamfers to achieve no gap at the connection between the arc-shaped plate and the base.

[0025] When it is necessary to adjust the radian of the grinding angle, the rotating rod 5 is screwed. Under the action of screw drive, the rotating rod 5 pushes or pulls the arc-shaped plate forward or backward. Also, since the arc-shaped plate is slidably connected to the two sides of the base, the arc-shaped plate slides along between the two substrates to achieve the adjustment of different radians.

[0026] Although the embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model, and they are not limitations of the utility model. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can, without departing from the principles and purposes of the present utility model, make modifications, substitutions and variations that do not contribute creatively to the embodiments according to needs. However, as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A positive angle grinding tool, characterized in that: The hinge shaft comprises a hinged shaft (4), the left and right sides of the hinge shaft are respectively hinged with a base plate, the opposite sides of the two base plates are slidably connected with a deformable arc plate (2), the hinge shaft is threadedly connected with a transmission rod (5), the front end of the transmission rod passes through the hinge shaft and is rotatably connected with the arc plate.

2. A positive angle grinding tool according to claim 1, characterized in that: Each base plate is provided with a slide groove, and the arc plate is provided with a sliding block slidably connected with the slide groove.

3. A positive angle grinding tool according to claim 2, characterized in that: The sliding block is connected to the arc-shaped plate (2) via a universal coupling (8).

4. The external corner grinding tool according to claim 3, characterized in that: The slide groove is a T-shaped groove, and the slider is a T-shaped slider matched with the T-shaped groove.

5. The external corner grinding tool according to claim 1, characterized in that: A rotating seat (6) is provided on a side of the arc-shaped plate (2) close to the base, and the front end of the transmission rod (5) is rotatably connected to the rotating seat.

6. The external corner grinding tool according to claim 5, characterized in that: The center of the rotating seat (6) is located at the center of the arc-shaped plate (2), and the arc-shaped plate (2) is arranged in a left-right symmetrical manner with respect to the hinge axis (4).

7. The external corner grinding tool according to claim 1, characterized in that: The axis of the transmission rod (5) and the axis of the hinge shaft (4) are arranged perpendicular to each other.

8. The external corner grinding tool according to claim 1, characterized in that: The arc-shaped plate (2) is an elastic plate.

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