Silent drill bit

Abstract

The invention discloses a mute drill bit which aims at enabling two surrounding plates to be capable of being opened and closed, simplifying the structure and reducing noise during deslagging, the mute drill bit comprises a top plate, a bottom plate, side plates, a lifting plate and the surrounding plates, the top plate and the bottom plate are arranged in an up-down spaced mode, the side plates are connected with the top plate and the bottom plate, the two side plates are symmetrically arranged, and a drilling mechanism is arranged on the bottom plate; the lifting plate is located between the top plate and the bottom plate, at least two guide columns are fixed to the top of the lifting plate and penetrate through the top plate, limiting rings are arranged on the guide columns, the limiting rings are located on the side, opposite to the lifting plate, of the top plate, the guide columns are sleeved with springs, and the springs are located between the limiting rings and the top plate; the two surrounding plates are symmetrically arranged, the surrounding plates and the side plates are alternately arranged to construct a containing cavity, the upper portions of the surrounding plates are rotationally connected with the top plate, a pushing mechanism is arranged on the lifting plate and connected with the surrounding plates, and the lifting plate ascends and descends to drive the surrounding plates to rotate.

Description

Technical Field

[0001] This invention belongs to the field of drill bit technology, and more specifically, relates to a silent drill bit. Background Technology

[0002] Open-body drill bits are a type of drilling tool suitable for hole-forming operations in building foundation engineering. After drilling into strata such as clay and silt, the drill bit fills with soil. When the drill bit is lifted to the ground, the drill bit baffle on the lower side of the drill bit is opened, allowing the soil inside the drill bit to fall to the ground by gravity. However, some clay, silt, and other soil will adhere to the inside of the drill bit. Under normal circumstances, the operator will rotate the drill bit back and forth. During this process, the back and forth rotation of the drill bit will generate noise at the connection between the drill bit baffle and the drill barrel, and between the drill rod and the drill bit. If rotary pile drilling is carried out in urban areas, on the one hand, it will increase the noise in the construction area and increase the number of complaints from surrounding residents. On the other hand, the physical and mental health of the personnel who are in the vicinity of the construction machinery for a long time will be affected.

[0003] In response to this situation, patent 202311187109.6 discloses an open-body silent drill bit, including a disc seat. A fixed half-cylinder is fixed on the bottom left side of the disc seat, and a movable half-cylinder is movably assembled on the right side of the fixed half-cylinder and located at the bottom of the disc seat. A semi-circular support plate is fixed on the inner side of the movable half-cylinder. When the main spring pressure rod in the fixed half-cylinder drives the top block to slide to one side, the locking block is in an unlocked state on the sliding shaft, thereby unlocking the movable half-cylinder. The entire movable half-cylinder can slide downward in the unlocked state of the locking block. The movable half-cylinder is installed in the movable groove in the fixed plate through the sliding shaft. After the movable half-cylinder slides down, an external piling machine can be controlled to make the drill teeth of the movable half-cylinder hook onto the ground, thereby dragging the movable half-cylinder to open and discharge slag.

[0004] It uses a pressure rod to open the movable half-cylinder, allowing the soil to fall out and thus reducing noise; however, the drill bit has a complex structure, and after unlocking, the movable half-cylinder needs to be dragged on the ground to open the chamber for slag discharge, which is inconvenient in actual use. Summary of the Invention

[0005] The main objective of this invention is to provide a silent drill bit that allows the two side panels to open and close, simplifying the structure while reducing noise during slag removal.

[0006] According to a first aspect of the present invention, a silent drill bit is provided, comprising a top plate, a bottom plate, side plates, a lifting plate, and a surrounding plate, wherein the top plate and the bottom plate are arranged vertically at intervals, the side plates connect the top plate and the bottom plate, there are two side plates arranged symmetrically, and the bottom plate is provided with a drilling mechanism;

[0007] The lifting plate is located between the top plate and the bottom plate. At least two guide posts are fixed to the top of the lifting plate. The guide posts pass through the top plate. A limiting ring is provided on the guide post. The limiting ring is located on the side of the top plate facing away from the lifting plate. A spring is sleeved on the guide post. The spring is located between the limiting ring and the top plate.

[0008] The enclosure is composed of two symmetrically arranged panels, which are alternately arranged with the side panels to form a receiving chamber. The upper part of the enclosure is rotatably connected to the top plate. The lifting plate is provided with a pushing mechanism, which is connected to the enclosure. The lifting plate moves up and down, causing the enclosure to rotate.

[0009] In the aforementioned silent drill bit, the top of the lifting plate is provided with a column, the top of the column is provided with a crossbeam, the crossbeam is provided with a support rod corresponding to the guide column, the support rod is fixedly connected to the guide column, and the pushing mechanism connects the crossbeam and the surrounding plate.

[0010] In the aforementioned silent drill bit, there are two pushing mechanisms, each corresponding to one of the two enclosure plates.

[0011] In the aforementioned silent drill bit, the pushing mechanism includes a slant rod and a connecting rod. The upper end of the slant rod is fixedly connected to the crossbeam, the lower end of the slant rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the surrounding plate.

[0012] In the aforementioned silent drill bit, the top plate is provided with a connecting lug, and a rotating shaft passes through the connecting lug. The surrounding plate is rotatably connected to the rotating shaft.

[0013] In the aforementioned silent drill bit, the connecting lug is located between the top plate and the lifting plate, and the surrounding plate has a notch for avoiding the connecting lug.

[0014] In the aforementioned silent drill bit, the top surface of the top plate is provided with a connecting post, which is used to connect to an external drilling rig.

[0015] In the aforementioned silent drill bit, a reinforcing plate is provided on the outer wall of the connecting post, and the guide post passes through the reinforcing plate.

[0016] In the aforementioned silent drill bit, the top surface of the base plate is provided with an annular retaining ring, and the side plate is connected to the annular retaining ring.

[0017] In the aforementioned silent drill bit, a reinforcing block is connected between the side plate and the annular retaining ring.

[0018] One of the above-described technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0019] In this invention, the guide column can descend under the action of external force. After the external force is removed, the guide column will rise under the action of the spring. The rising and falling of the guide column will drive the lifting plate to rise and fall. When the lifting plate moves down, the pushing mechanism will push the surrounding plate to rotate, thereby opening the receiving chamber. During the process of the lifting plate moving down, it will squeeze the soil in the receiving chamber and promote the discharge of slag. When the lifting plate moves up, the pushing mechanism will pull the surrounding plate back to its original position. The opening and closing of the surrounding plate is achieved through this structure. The structure is simple and reduces the noise during slag discharge. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0021] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the enclosure when it is opened according to the first embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure after removing one of the surrounding panels in the first embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the base plate according to the first embodiment of the present invention.

[0025] The figure labels for each figure are as follows:

[0026] 1. Top plate; 11. Connecting ear; 12. Rotating shaft; 13. Connecting column; 14. Reinforcing plate; 2. Bottom plate; 21. Annular retaining ring; 3. Side plate; 31. Reinforcing block; 4. Lifting plate; 41. Guide column; 42. Pushing mechanism; 421. Diagonal bar; 422. Connecting rod; 43. Column; 44. Crossbeam; 45. Support rod; 5. Enclosure plate; 6. Drilling mechanism; 61. Mounting plate; 62. Drill teeth. Detailed Implementation

[0027] Embodiments of the present invention 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 the present invention, and should not be construed as limiting the present invention.

[0028] Reference Figures 1 to 4 As shown, a silent drill bit includes a top plate 1, a bottom plate 2, side plates 3, a lifting plate 4 and a surrounding plate 5. The top plate 1 and the bottom plate 2 are arranged vertically at intervals. The side plates 3 connect the top plate 1 and the bottom plate 2. There are two side plates 3 arranged symmetrically. The bottom plate 2 is provided with a drilling mechanism 6.

[0029] The lifting plate 4 is located between the top plate 1 and the bottom plate 2. Two guide posts 41 are fixed on the top of the lifting plate 4. The guide posts 41 pass through the top plate 1. A limiting ring is provided on the guide post 41. The limiting ring is located on the side of the top plate 1 facing away from the lifting plate 4. A spring is sleeved on the guide post 41. The spring is located between the limiting ring and the top plate 1.

[0030] There are two enclosure panels 5 arranged symmetrically. The enclosure panels 5 and the side panels 3 are arranged alternately to form a cavity. The upper part of the enclosure panel 5 is rotatably connected to the top plate 1. The lifting plate 4 is equipped with a pushing mechanism 42, which is connected to the enclosure panel 5. The lifting plate 4 lifts and moves the enclosure panel 5 to rotate.

[0031] In use, the enclosure 5 is initially in the closed state, forming a cylindrical shape with the side plate 3 inside, which is a receiving chamber. During rotation, the drilling mechanism 6 performs drilling, allowing soil to enter the receiving chamber. Afterward, the drill bit reaches the ground, and the guide column 41 descends under external force. The rise and fall of the guide column 41 drives the lifting plate 4 to rise and fall. When the lifting plate 4 moves down, the pushing mechanism 42 pushes the enclosure 5 to rotate, thereby opening the receiving chamber. The downward movement of the lifting plate 4 also compresses the soil in the receiving chamber, promoting slag discharge. After the external force is removed, the guide column 41 rises under the action of the spring. When the lifting plate 4 moves up, the pushing mechanism 42 pulls the enclosure 5 back to its original position. This structure enables the opening and closing of the enclosure 5, is simple, and reduces noise during slag discharge.

[0032] In this embodiment, the top surface of the base plate 2 is provided with an annular retaining ring 21, the side plate 3 is connected to the annular retaining ring 21, and the surrounding plate 5, the side plate 3 and the annular retaining ring 21 cooperate to form an accommodating chamber above the base plate 2.

[0033] The base plate 2 has a hollow area. The drilling mechanism 6 includes a mounting plate 61. The bottom of the mounting plate 61 has downward-extending drill teeth 62. The mounting plate 61 is located below the base plate 2 and is rotatably connected to the base plate 2. The mounting plate 61 can cover the hollow area. There is a stop on the base plate. When drilling, the drill bit rotates in the forward direction. The mounting plate 61 abuts against one side of the stop. At this time, the mounting plate 61 does not block the hollow area, and the soil can enter the receiving chamber. When the drill bit leaves the pile hole, the drill bit rotates in the reverse direction. The mounting plate 61 abuts against the other side of the stop. At this time, the mounting plate 61 can block the hollow area, and the soil will not fall out of the hollow area.

[0034] In this embodiment, the top of the lifting plate 4 is provided with a column 43, the top of the column 43 is provided with a crossbeam 44, and the crossbeam 44 is provided with a support rod 45 corresponding to the guide column 41. The support rod 45 is fixedly connected to the guide column 41. The column 43, the crossbeam 44 and the support rod 45 form a frame to transmit the force of the guide column 41 to the lifting plate 4.

[0035] There are two pushing mechanisms 42, each corresponding to one of the two enclosure plates 5. Each pushing mechanism 42 includes a diagonal rod 421 and a connecting rod 422. The upper end of the diagonal rod 421 is fixedly connected to the crossbeam 44, and the lower end of the diagonal rod 421 is hinged to one end of the connecting rod 422. The other end of the connecting rod 422 is hinged to the enclosure plate 5. The rotation axis of the upper end of the connecting rod 422 and the rotation axis of the lower end of the connecting rod 422 are both parallel to the rotation axis of the enclosure plate 5.

[0036] The diagonal rod 421 and the connecting rod 422 form a flexible hinge. Since the rotational position of the enclosure plate 5 and the top plate 1 is fixed, when the lifting plate 4 descends, the angle between the connecting rod 422 and the horizontal plane will gradually decrease, while the length of the connecting rod 422 remains unchanged. Therefore, the connecting rod 422 will push the enclosure plate 5 to rotate outward. When the lifting plate 4 rises, the connecting rod 422 will pull the enclosure plate 5 back.

[0037] In this embodiment, the top plate 1 is provided with a connecting ear 11, which is located between the top plate 1 and the lifting plate 4. The surrounding plate 5 is provided with a notch for avoiding the connecting ear 11. A rotating shaft 12 is passed through the connecting ear 11. The surrounding plate 5 and the rotating shaft 12 are rotatably connected. The connecting ear 11 can be hidden below the top plate 1 and does not protrude outward, so as to avoid being affected by the drill bit during construction.

[0038] In this embodiment, the top surface of the top plate 1 is provided with a connecting column 13, which is used to connect the drill rod of the external drilling machine. The drill bit can rotate and rise and fall under the drive of the drill rod. At the same time, the external drilling machine is provided with a pressure plate. The pressure plate descends to push the guide column 41. After the pressure plate rises, the guide column 41 is reset under the action of the spring.

[0039] In this embodiment, a reinforcing plate 14 is provided on the outer wall of the connecting column 13, and the guide column 41 passes through the reinforcing plate 14. The top plate 1 and the reinforcing plate 14 cooperate to support the sliding of the guide column 41.

[0040] Specifically, both the top plate 1 and the reinforcing plate 14 are provided with guide sleeves, which are slidably engaged with the guide post 41.

[0041] In this embodiment, a reinforcing block 31 is connected between the side plate 3 and the annular retaining ring 21 to improve strength, and the surrounding plate 5 has a chamfer to avoid the reinforcing block 31.

[0042] Although embodiments of the 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A silent drill bit, characterized in that, It includes a top plate, a bottom plate, side plates, a lifting plate, and a surrounding plate. The top plate and the bottom plate are arranged vertically at intervals. The side plates connect the top plate and the bottom plate. There are two side plates arranged symmetrically. The bottom plate is provided with a drilling mechanism. The lifting plate is located between the top plate and the bottom plate. At least two guide posts are fixed to the top of the lifting plate. The guide posts pass through the top plate. A limiting ring is provided on the guide post. The limiting ring is located on the side of the top plate facing away from the lifting plate. A spring is sleeved on the guide post. The spring is located between the limiting ring and the top plate. The enclosure is composed of two symmetrically arranged panels, which are alternately arranged with the side panels to form a receiving chamber. The upper part of the enclosure is rotatably connected to the top plate. The lifting plate is provided with a pushing mechanism, which is connected to the enclosure. The lifting plate moves up and down, causing the enclosure to rotate.

2. The silent drill bit according to claim 1, characterized in that, The lifting plate has a column at the top, a crossbeam at the top of the column, and a support rod on the crossbeam that corresponds to the guide column. The support rod is fixedly connected to the guide column, and the pushing mechanism connects the crossbeam and the surrounding plate.

3. The silent drill bit according to claim 2, characterized in that, There are two propulsion mechanisms, each corresponding to one of the two enclosure panels.

4. The silent drill bit according to claim 2, characterized in that, The pushing mechanism includes a diagonal bar and a connecting rod. The upper end of the diagonal bar is fixedly connected to the crossbeam, the lower end of the diagonal bar is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the enclosure plate.

5. The silent drill bit according to claim 1, characterized in that, The top plate is provided with a connecting lug, and a rotating shaft passes through the connecting lug. The surrounding plate is rotatably connected to the rotating shaft.

6. The silent drill bit according to claim 5, characterized in that, The connecting lug is located between the top plate and the lifting plate, and the surrounding plate has a notch for avoiding the connecting lug.

7. The silent drill bit according to claim 1, characterized in that, The top surface of the top plate is provided with a connecting column, which is used to connect an external drilling rig.

8. The silent drill bit according to claim 7, characterized in that, The outer wall of the connecting column is provided with a reinforcing plate, and the guide column passes through the reinforcing plate.

9. The silent drill bit according to claim 1, characterized in that, The top surface of the base plate is provided with an annular retaining ring, and the side plate is connected to the annular retaining ring.

10. The silent drill bit according to claim 9, characterized in that, A reinforcing block connects the side plate to the annular retaining ring.

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