Woodworking tapper capable of discharging chips smoothly

Abstract

The utility model discloses a woodworking tapper capable of removing chips smoothly, which relates to the technical field of chip removal of tappers, and comprises a cylindrical cover body and a connecting shaft, a drill bit is arranged below the connecting shaft, a piston plate and a micro hollow baffle are sequentially arranged on the inner side of the cylindrical cover body from top to bottom, and the micro hollow baffle is parallel to the piston plate. Guide rods are annularly and evenly arranged above the piston plate, a sliding sleeve is fixedly installed in the middle of the piston plate, a closed spiral groove is formed in the inner side face of the sliding sleeve, a sliding block is arranged on the drill bit and slidably connected into the spiral groove, a reset spring is connected to the outer side of the drill bit in a sleeving mode, and the reset spring and the micro-hollowed-out baffle are fixedly installed. Ventilation holes are annularly formed in the outer side of the cylindrical cover body. According to the scheme, chip removal of the woodworking tapper can be facilitated, the drilling position of the woodworking tapper can be automatically cooled in the drilling machining process of the woodworking tapper through starting of the electric drill, and the use effect of the woodworking tapper is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of chip removal of hole openers, in particular to a woodworking hole opener with smooth chip removal. Background Art

[0002] A hole opener is a tool used in modern industry or engineering to process through holes. It is usually installed on an electric drill to cut holes on the surface of copper, iron, stainless steel, plexiglass, wood and other plates.

[0003] Existing hole openers generally include a cylindrical cover, a connecting shaft, and a positioning drill. The outer side of the positioning drill is provided with a return spring, one end of which is fixed to the connecting shaft. When the hole opener is working, the cut waste material will be embedded in the cylindrical cover, and the return spring will exert a certain thrust on the waste material, allowing the waste material to be discharged. However, due to the limited elastic force of the return spring, when the hole opener is applied to a plate with a large coefficient of friction on the cut surface, if the friction between the waste material and the cylindrical cover is greater than the elastic force of the return spring, it will be difficult for the return spring to push the waste material out, affecting the smooth chip removal of the hole opener. To address this issue, we propose a woodworking hole opener with smooth chip removal. Utility Model Content

[0004] The purpose of the present utility model is to provide a woodworking hole opener with smooth chip removal, so as to solve the problem of the existing hole opener proposed in the above background technology. Since the elastic force of the return spring is limited, when the hole opener is used for a plate with a large cross-section friction coefficient, if the friction between the waste material and the cylindrical cover is greater than the elastic force of the return spring, it is difficult for the return spring to push the waste material out, thereby affecting the smooth chip removal of the hole opener.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a woodworking hole opener with smooth chip removal, comprising a cylindrical cover body and a connecting shaft, the connecting shaft is fixedly installed on the electric drill shaft, a drill bit is provided below the connecting shaft, a top cover is connected to the top of the cylindrical cover body by bolts, the top cover and the connecting shaft are threadedly connected, a piston plate and a micro-hollow baffle are sequentially provided on the inside of the cylindrical cover body from top to bottom, the micro-hollow baffle and the piston plate are parallel to each other, a guide rod is evenly provided in an annular shape above the piston plate, the guide rod is movably plugged into the top cover, a sliding sleeve is fixedly installed in the middle of the piston plate, a closed spiral groove is provided on the inner side of the sliding sleeve, a slider is provided on the drill bit, the slider is slidably connected to the inside of the spiral groove, a reset spring is sleeved on the outside of the drill bit, the reset spring is fixedly installed on the micro-hollow baffle, and a ventilation hole is provided in an annular shape on the outside of the cylindrical cover body.

[0006] Preferably, a groove for sliding of the micro-hollow baffle is provided at the inner upper end of the cylindrical cover, and the side surface of the piston plate is in contact with the side wall of the groove.

[0007] Preferably, the guide rods are arranged in a ring shape on the center line of the connecting shaft and are parallel to each other, and the guide rods are arranged in a ring shape on the outside of the connecting shaft.

[0008] Preferably, the piston plate is arranged at the lower end of the sliding sleeve.

[0009] Preferably, the ventilation hole is placed on the upper side of the cylindrical cover, and the ventilation hole is a waist-shaped hole.

[0010] Preferably, the micro-hollow baffle is in contact with the side wall of the groove.

[0011] Preferably, the length of the guide rod is greater than the maximum distance between the micro-hollow baffle and the top cover.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This woodworking hole saw with smooth chip removal can rotate the connecting shaft when the electric drill is used, thereby driving the slider fixed to the connecting shaft to move in an annular manner. Since the slider always slides inside the spiral groove, the slider can drive the sliding sleeve and the piston plate to move upward and downward alternately during the annular movement of the slider. During the downward movement of the sliding sleeve, the return spring is squeezed to exert a driving force on the micro-hollow baffle, thereby facilitating the discharge of waste chips inside the cylindrical cover.

[0014] 2. This type of woodworking hole opener has smooth chip removal. When the piston plate moves from bottom to top, external air can enter the cylindrical cover through the waist-shaped ventilation hole; when the piston plate moves from top to bottom, the cavity area between the micro-hollow baffle and the piston plate is reduced, which can compress the air, so that the gas entering the cavity formed by the micro-hollow baffle and the piston plate is discharged through the micro-hollow baffle. During the drilling process of the woodworking hole opener, the drilling position can be automatically cooled, further ensuring the use effect of the woodworking hole opener. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the utility model from a first perspective;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model from a second perspective;

[0017] Figure 3 This is a schematic diagram of a half-section structure of the present utility model;

[0018] Figure 4 For the utility model Figure 3 Enlarged schematic diagram of point M.

[0019] In the figure: 1. Cylindrical cover; 2. Connecting shaft; 3. Ventilation hole; 4. Drill bit; 5. Return spring; 6. Guide rod; 7. Micro-hollow baffle; 8. Piston plate; 81. Sliding sleeve; 82. Spiral groove; 83. Slider; 9. Top cover. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example: See Figure 1-4 The present invention provides a technical solution: a woodworking hole opener with smooth chip removal, mainly targeting existing hole openers. Due to the limited elastic force of the return spring, when the hole opener is applied to a plate with a large cross-section friction coefficient, if the friction between the waste material and the cylindrical cover is greater than the elastic force of the return spring, the return spring will have difficulty in pushing the waste material out, affecting the smooth chip removal of the hole opener. The specific solution is as follows: It includes a cylindrical cover 1 and a connecting shaft 2, the connecting shaft 2 is fixedly mounted on the electric drill shaft, a drill bit 4 is provided below the connecting shaft 2, and a return spring 5 is sleeved on the outside of the drill bit 4, and the return spring 5 is fixedly mounted to the micro-hollow baffle 7. After the electric drill is working, the connecting shaft 2 can be rotated, thereby driving the drill bit 4 and the cylindrical cover 1 to rotate.

[0022] See also Figure 3 A top cover 9 is connected to the top of the cylindrical cover body 1 by bolts, and the top cover 9 and the connecting shaft 2 are connected by threads. The arrangement of the top cover 9 can facilitate the replacement or maintenance of the components inside the cylindrical cover body 1. A piston plate 8 and a micro-hollow baffle 7 are arranged in sequence from top to bottom on the inner side of the cylindrical cover body 1. A groove for the sliding of the micro-hollow baffle 7 is opened at the upper end of the inner side of the cylindrical cover body 1, and the side of the piston plate 8 fits with the side wall of the groove. The micro-hollow baffle 7 fits with the side wall of the groove. The micro-hollow baffle 7 and the piston plate 8 are parallel to each other, and the piston plate 8 is arranged at the lower end of the sliding sleeve 81. When an external force causes the piston plate 8 to move downward along the axial direction of the connecting shaft 2, it can generate a top-down pushing force on the micro-hollow baffle 7. The downward movement of the micro-hollow baffle 7 can enable the waste chips generated during the woodworking hole opening process to be discharged from the inside of the cylindrical cover body 1 to the outside, making the chip removal operation easy.

[0023] Furthermore, guide rods 6 are evenly arranged in a circular pattern above the piston plate 8. These guide rods 6 are movably connected to the top cover 9 and arranged in a circular pattern parallel to the centerline of the connecting shaft 2. The length of the guide rods 6 is greater than the maximum distance between the micro-perforated baffle 7 and the top cover 9. A sliding sleeve 81 is fixedly mounted in the middle of the piston plate 8. A closed spiral groove 82 is defined on the inner surface of the sliding sleeve 81. A slider 83 is provided on the drill bit 4 and slidably engages within the spiral groove 82. During operation, the electric drill rotates the connecting shaft 2, thereby driving the slider 83, which is fixed to the connecting shaft 2, in a circular motion. Since the slider 83 continuously slides within the spiral groove 82, the circular motion of the slider 83 drives the sliding sleeve 81 and the piston plate 8 to alternately move upward and downward. During the downward motion of the sliding sleeve 81, the return spring 5 is compressed, exerting a force on the micro-perforated baffle 7, facilitating the discharge of waste chips from the cylindrical housing 1.

[0024] In this embodiment, a ventilation hole 3 is provided in the shape of a ring on the outer side of the cylindrical cover 1. The ventilation hole 3 is located on the upper side of the cylindrical cover 1 and is a waist-shaped hole. When the electric drill is working, the connecting shaft 2 can rotate, thereby driving the slider 83 fixed to the connecting shaft 2 to move in a ring shape. Since the slider 83 always slides within the spiral groove 82, the slider 83 can drive the sliding sleeve 81 and the piston plate 8 to move alternately upward and downward during the ring shape movement. During this process, when the piston plate 8 moves from bottom to top, external air can enter the cylindrical cover 1 through the waist-shaped ventilation hole 3. When the piston plate 8 moves from top to bottom, the cavity area between the micro-hollow baffle 7 and the piston plate 8 is reduced, which can compress the air, so that the gas entering the cavity formed by the micro-hollow baffle 7 and the piston plate 8 is discharged through the micro-hollow baffle 7. During the drilling process of the woodworking hole opener, the drilling position of the woodworking hole opener can be automatically cooled, further ensuring the use effect of the woodworking hole opener.

[0025] Working principle: This woodworking hole saw with smooth chip removal, in the initial state, Figure 2As shown, the micro-hollow baffle 7 is higher than the lower end surface of the groove; when the electric drill is working, the connecting shaft 2 can be rotated, thereby driving the slider 83 fixedly mounted on the connecting shaft 2 to move in an annular manner. Since the slider 83 always slides inside the spiral groove 82, during the annular movement of the slider 83, the sliding sleeve 81 and the piston plate 8 can be driven to move alternately upward and downward. During the downward movement of the sliding sleeve 81, the return spring 5 is squeezed, which can realize a driving force for the micro-hollow baffle 7, thereby facilitating the discharge of waste chips inside the cylindrical cover 1; at the same time, when the piston plate 8 moves from bottom to top, external air can enter the cylindrical cover 1 through the ventilation hole 3 in the shape of a waist hole; and when the piston plate 8 moves from top to bottom, the cavity area between the micro-hollow baffle 7 and the piston plate 8 is reduced, which can compress the air, so that the gas entering the cavity composed of the micro-hollow baffle 7 and the piston plate 8 is discharged through the micro-hollow baffle 7, which can automatically cool the drilling position during the drilling process of the woodworking hole opener.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A woodworking hole saw with smooth chip removal, comprising a cylindrical cover (1) and a connecting shaft (2), wherein the connecting shaft (2) is fixedly mounted on an electric drill shaft, and is characterized in that: A drill bit (4) is provided below the connecting shaft (2), a top cover (9) is connected to the top of the cylindrical cover (1) by bolts, the top cover (9) and the connecting shaft (2) are connected by threads, a piston plate (8) and a micro-hollow baffle (7) are provided on the inner side of the cylindrical cover (1) from top to bottom, the micro-hollow baffle (7) and the piston plate (8) are parallel to each other, and a guide rod (6) is evenly provided in an annular shape above the piston plate (8), and the guide rod (6) is movably plugged into the top cover (9), a sliding sleeve (81) is fixedly installed in the middle of the piston plate (8), and a closed spiral groove (82) is opened on the inner side of the sliding sleeve (81), and a slider (83) is provided on the drill bit (4), and the slider (83) is slidably connected to the inside of the spiral groove (82). A return spring (5) is sleeved on the outer side of the drill bit (4), and the return spring (5) is fixedly installed with the micro-hollow baffle (7). A ventilation hole (3) is opened in an annular shape on the outer side of the cylindrical cover (1).

2. A woodworking hole saw with smooth chip removal according to claim 1, characterized in that: A groove for sliding the micro-hollow baffle (7) is provided at the inner upper end of the cylindrical cover (1), and the side surface of the piston plate (8) is in contact with the side wall of the groove.

3. The woodworking hole saw with smooth chip removal according to claim 1, characterized in that: The guide rods (6) are arranged in a ring shape on the center line of the connecting shaft (2) and are parallel to each other, and the guide rods (6) are arranged in a ring shape on the outside of the connecting shaft (2).

4. The woodworking hole saw with smooth chip removal according to claim 1, characterized in that: The piston plate (8) is arranged at the lower end of the sliding sleeve (81).

5. The woodworking hole saw with smooth chip removal according to claim 1, characterized in that: The ventilation hole (3) is placed on the upper side of the cylindrical cover (1), and the ventilation hole (3) is a waist-shaped hole.

6. The woodworking hole saw with smooth chip removal according to claim 2, characterized in that: The micro-hollow baffle (7) is fitted to the side wall of the groove.

7. The woodworking hole saw with smooth chip removal according to claim 1, characterized in that: The length of the guide rod (6) is greater than the maximum distance between the micro-hollow baffle (7) and the top cover (9).

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