Electric hammer drill bit with quick-change structure

Abstract

The utility model discloses an electric hammer drill bit with a quick-change structure, which comprises a drill bit locking structure, the drill bit locking structure comprises a base, the top of the base is fixedly connected with a clamping seat, the inner wall of the clamping seat is slidably provided with the clamping seat, the clamping seat is triangular, and the end part of the clamping seat is rotatably connected with a roller; the electric hammer drill bit comprises a drill rod, a positioning seat is installed at the bottom end of the drill rod, a conical sliding seat is installed above the positioning seat in a sliding mode, the electric hammer drill bit relates to the field of electric hammer drill bits, through mechanical extrusion of the positioning seat and a clamping seat and reset linkage of a spring, the drill rod can be rapidly inserted and pulled without an additional tool, and compared with a traditional screw fastening mode, the electric hammer drill bit has the advantages of being simple in structure and convenient to use. The drill bit replacement time is greatly shortened, and the operation efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of electric hammer drill bit technology, specifically an electric hammer drill bit with a quick-change structure. Background Technology

[0002] In electric hammer drilling scenarios, traditional drill bit connection structures often employ screw fastening or slot fixing methods. Screw fastening requires tools, making the replacement process cumbersome and time-consuming. While ordinary slot structures are easy to disassemble, they are prone to loosening and falling off under high-frequency vibration conditions, affecting operational safety and efficiency. Existing quick-change structures also suffer from problems such as high frictional resistance and inaccurate positioning, making it difficult to simultaneously meet the dual requirements of rapid disassembly and stable connection. Utility Model Content

[0003] The purpose of this invention is to provide a hammer drill bit with a quick-change structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A hammer drill bit with a quick-change mechanism includes:

[0006] A drill bit locking structure includes a base, a card seat is fixedly connected to the top of the base, a card seat is slidably installed on the inner wall of the card seat, the card seat is triangular in shape, and a roller is rotatably connected to the end of the card seat;

[0007] A hammer drill bit, comprising a drill rod, a positioning seat mounted at the bottom end of the drill rod, and a tapered slide seat slidably mounted above the positioning seat.

[0008] In a preferred embodiment of this utility model, the inner walls of the base and the card holder are provided with a circular through hole running vertically through the base, and the side wall of the card holder is provided with a sliding groove.

[0009] In a preferred embodiment of this utility model, two sets of sliding grooves are symmetrically arranged on the left and right sides, the sliding grooves are configured as stepped grooves, and the first sliding rod is fixedly installed on the outer wall of the rear end of the card seat.

[0010] In a preferred embodiment of the present invention, the first slide rod extends through the slide groove to the outside, a locking block is fixedly installed at the outer end of the first slide rod, and a return spring is sleeved on the outer wall of the first slide rod.

[0011] In a preferred embodiment of this utility model, a roller groove is provided at the end of the card holder, and the inner wall of the roller groove is rotatably connected to a roller through a bearing.

[0012] In a preferred embodiment of this utility model, a limiting block is welded to the outer wall of the bottom end of the drill rod, and a second sliding rod is provided below the limiting block. A conical sliding seat is slidably connected to the outer wall of the second sliding rod.

[0013] In a preferred embodiment of this utility model, a positioning seat is fixedly connected to the bottom outer wall of the second slide rod. The positioning seat is cone-shaped, and a positioning slot is provided on the top of the positioning seat.

[0014] In a preferred embodiment of this utility model, the card holder is engaged with the inner wall of the positioning slot for positioning, and the bottom of the conical slide and the top of the positioning seat have the same diameter.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0016] 1. Through the mechanical compression of the positioning seat and the chuck, and the linkage of spring return, drill pipes can be quickly inserted and removed without additional tools. Compared with the traditional screw fastening method, this significantly shortens drill bit change time and greatly improves work efficiency.

[0017] 2. By utilizing the circumferential engagement of the card seat and the positioning slot, and the axial support of the conical slide and the positioning seat, a double limiting structure is formed, which effectively resists the high-frequency vibration of the electric hammer, prevents the drill bit from loosening, and ensures construction safety;

[0018] 3. The design of the rollers and stepped grooves transforms sliding friction into rolling friction, provides precise guidance, reduces insertion and extraction resistance, makes operation easy and smooth, and at the same time reduces component wear and extends service life. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the main structure of a hammer drill bit with a quick-change mechanism.

[0021] Figure 2 A top view of the chuck structure in a hammer drill bit with a quick-change mechanism;

[0022] Figure 3 This is an exploded view of the chuck structure in a hammer drill bit with a quick-change mechanism.

[0023] Figure 4 A schematic diagram of the pin structure in a hammer drill bit with a quick-change mechanism;

[0024] Figure 5This is a schematic diagram of the structure of an electric hammer drill bit with a quick-change mechanism.

[0025] In the figure: base 100, card holder 110, slide groove 120, first slide rod 130, card block 131, return spring 132, card holder 134, roller groove 135, roller 136, drill rod 200, limit block 210, conical slide 220, positioning seat 230, positioning slot 231, second slide rod 240. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] Example 1: As Figure 1 and 2 ,include:

[0028] The drill bit locking structure includes a base 100, a card seat 110 fixedly connected to the top of the base 100, a card seat 134 slidably installed on the inner wall of the card seat 110, the card seat 134 is triangular, and a roller 136 is rotatably connected to the end of the card seat 134.

[0029] The electric hammer drill bit includes a drill rod 200, a positioning seat 230 is installed at the bottom end of the drill rod 200, and a tapered slide 220 is slidably installed above the positioning seat 230.

[0030] The specific usage scenario of this embodiment is as follows: The base 100 is fixed inside the electric hammer body. The drill rod 200 is vertically inserted into the circular through hole of the clasp 110. The positioning seat 230 presses down on the roller 136 of the clasp 134. The roller 136 is set to reduce friction and improve the smoothness of operation. The triangular clasp 134 is pressed by the positioning seat 230 and slides outward in the slide groove 120 through the first slide rod 130. At this time, the return spring 132 is compressed until the positioning seat 230 completely passes through the clasp 110. After the positioning seat 230 passes the clasp 134, the return spring 132 pushes the clasp 134 to return to its original position. The roller 136 is engaged with the outside of the conical slide 220 above the positioning seat 230 to form a mechanical lock and fix the drill rod 200.

[0031] Example 2: Figure 1 and Figure 2The drill bit locking structure includes a base 100, a retaining seat 110 fixedly connected to the top of the base 100, a retaining seat 134 slidably mounted on the inner wall of the retaining seat 110, the retaining seat 134 being triangular in shape, and a roller 136 rotatably connected to the end of the retaining seat 134; an electric hammer drill bit includes a drill rod 200, a positioning seat 230 mounted on the bottom end of the drill rod 200, and a conical slide 220 slidably mounted above the positioning seat 230; the inner walls of the base 100 and the retaining seat 110 have a through circular hole extending vertically. The side wall of the card holder 110 is provided with a sliding groove 120. Two sets of sliding grooves 120 are symmetrically arranged on the left and right sides. The sliding grooves 120 are set as stepped grooves. The rear outer wall of the card holder 134 is fixedly installed with a first sliding rod 130. The first sliding rod 130 extends to the outside through the sliding groove 120. The outer end of the first sliding rod 130 is fixedly installed with a locking block 131. The outer wall of the first sliding rod 130 is fitted with a return spring 132. The end of the card holder 134 is provided with a roller groove 135. The inner wall of the roller groove 135 is rotatably connected to a roller 136 through a bearing.

[0032] The specific application scenario of this embodiment is as follows: Pulling the locking block 131 outward causes the locking seat 134 to overcome the elastic force of the return spring 132 and slide outward from the slide groove 120 via the first slide rod 130, so that the roller 136 disengages from the conical slide seat 220. The return spring 132 always provides an inward elastic force to ensure that the locking seat 134 remains locked when there is no external force. The stepped groove structure of the slide groove 120 provides a sliding track for the first slide rod 130, restricting the movement direction of the locking seat 134 to avoid shaking. The roller 136 is rotatably connected to the roller groove 135 through the bearing, converting the sliding friction between the locking seat 134 and the drill rod 200 into rolling friction, reducing the resistance to installation and disassembly.

[0033] Example 3: Figure 1 and Figure 2 The drill bit locking structure includes a base 100, a retaining seat 110 fixedly connected to the top of the base 100, a retaining seat 134 slidably mounted on the inner wall of the retaining seat 110, the retaining seat 134 being triangular in shape, and a roller 136 rotatably connected to the end of the retaining seat 134; and an electric hammer drill bit, including a drill rod 200, a positioning seat 230 mounted on the bottom end of the drill rod 200, a tapered slide seat 220 slidably mounted above the positioning seat 230, and the outer wall of the bottom end of the drill rod 200 welded to... A connecting limit block 210 is provided, and a second slide rod 240 is provided below the limit block 210. The outer wall of the second slide rod 240 is slidably connected to a conical slide seat 220. The bottom outer wall of the second slide rod 240 is fixedly connected to a positioning seat 230. The positioning seat 230 is set in a conical shape, and a positioning slot 231 is opened at the top of the positioning seat 230. The slot 134 and the inner wall of the positioning slot 231 are engaged and positioned. The bottom diameter of the conical slide seat 220 and the top diameter of the positioning seat 230 are the same.

[0034] The specific application scenario of this embodiment is as follows: When the drill rod 200 is inserted, the conical structure of the positioning seat 230 guides it to align with the circular through hole of the retainer 110. The positioning seat 230 pushes the retainer 134 to slide outward, and the conical slide 220 moves downward with the drill rod 200. The conical surface of the conical slide 220 contacts the roller 136, further guiding the retainer 134 to open outward. During disassembly, the drill rod 200 is first pressed down, and the conical surface of the conical slide 220 squeezes the roller 136, assisting the retainer 134 to move outward, so that the conical slide 220 enters below the retainer 134, and then... Pull out the drill rod 200. The drill rod 200 pulls the positioning seat 230 and the conical slide 220 together. Then, the outer wall of the conical slide 220 pushes the chuck 134 outward into the slide groove 120, so that the chuck 134 is separated from the outer wall of the conical slide 220, which facilitates the disassembly of the electric hammer drill bit. The positioning chuck groove 231 engages with the triangular end of the chuck 134 to form a circumferential limit, preventing the drill rod 200 from loosening due to vibration during operation. At the same time, the bottom of the conical slide 220 and the top of the positioning seat 230 have the same diameter, providing axial support and enhancing the connection stability.

[0035] The working principle of this utility model is as follows: When used by those skilled in the art, the base 100 is fixed inside the electric hammer body, the drill rod 200 is inserted, the positioning seat 230 presses the end roller 136 of the card seat 134, so that the card seat 134 slides in the slide groove 120 through the first slide rod 130, and the return spring 132 is compressed. After the positioning seat 230 passes through the clasp 110, the return spring 132 pushes the clasp 134 to return to its original position, and the roller 136 engages with the outer side of the conical slide 220, thus fixing the drill rod 200. The triangular end of the clasp 134 engages with the positioning slot 231, forming a circumferential limit. The bottom of the conical slide 220 has the same diameter as the top of the positioning seat 230, providing axial support to ensure that the drill rod 200 does not loosen during operation. Pulling the clasp 131 outward causes the clasp 134 to overcome the elastic force of the return spring 132 and slide within the slide groove 120, causing the roller 136 to disengage from the conical slide 220. Alternatively, pressing the drill rod 200 utilizes the conical surface of the conical slide 220 to squeeze the roller 136, assisting the clasp 134 to move outward. Then, the drill rod 200 is pulled out, completing the disassembly.

[0036] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric hammer drill bit with a quick change structure, characterized by, include: A drill bit locking structure includes a base (100), a card seat (110) is fixedly connected to the top of the base (100), a card seat (134) is slidably installed on the inner wall of the card seat (110), the card seat (134) is triangular, and a roller (136) is rotatably connected to the end of the card seat (134). The electric hammer drill bit includes a drill rod (200), a positioning seat (230) is installed at the bottom end of the drill rod (200), and a conical slide (220) is slidably installed above the positioning seat (230).

2. The hammer drill bit with quick change structure according to claim 1, characterized in that, The inner walls of the base (100) and the card holder (110) are provided with circular through holes running vertically through the base, and the side wall of the card holder (110) is provided with a sliding groove (120).

3. The hammer drill bit with quick change structure according to claim 2, characterized in that, Two sets of sliding grooves (120) are symmetrically arranged on the left and right sides. The sliding grooves (120) are set as stepped grooves. The first sliding rod (130) is fixedly installed on the outer wall of the rear end of the card seat (134).

4. The hammer drill bit with quick change structure according to claim 3, characterized in that, The first slide rod (130) extends to the outside through the slide groove (120), and a locking block (131) is fixedly installed at the outer end of the first slide rod (130). A return spring (132) is sleeved on the outer wall of the first slide rod (130).

5. The hammer drill bit with quick change structure according to claim 4, characterized in that, The end of the card holder (134) is provided with a roller groove (135), and the inner wall of the roller groove (135) is rotatably connected to the roller (136) through a bearing.

6. The hammer drill bit with quick change structure according to claim 1, characterized in that, A limiting block (210) is welded to the outer wall of the bottom end of the drill rod (200). A second slide rod (240) is provided below the limiting block (210). A conical slide seat (220) is slidably connected to the outer wall of the second slide rod (240).

7. The hammer drill bit with quick change structure according to claim 6, characterized in that, The bottom outer wall of the second slide rod (240) is fixedly connected to the positioning seat (230), the positioning seat (230) is set in a cone shape, and the top of the positioning seat (230) is provided with a positioning slot (231).

8. A hammer drill bit with a quick-change structure according to claim 7, characterized in that, The card holder (134) engages with the inner wall of the positioning slot (231) for positioning, and the bottom of the conical slide (220) and the top of the positioning seat (230) have the same diameter.

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