A bench drill

Abstract

This application relates to a bench drill, including a drill body, a spindle, a drill bit, and a worktable. A cover is slidably connected to the spindle, sliding along the axial direction of the spindle. The drill bit is located within the cover. An inner ring frame is fixedly connected to the inner top surface of the cover, with its circumference aligned with the circumference of the cover. The lower surface of the inner ring frame is higher than the lower surface of the cover. Several uprights are fixedly connected to the inner top surface of the cover, with a brush hinged to the lower end of each upright. The upper surface of the brush is flush with the lower surface of the cover. The cover contains an adsorption assembly for adsorbing sawdust and dust, as well as a sealing assembly. This application effectively reduces the adverse effects on post-processing cleaning.

Description

Technical Field

[0001] This application relates to the field of processing equipment, and in particular to a bench drill. Background Technology

[0002] Bench-type drilling machines are mainly used for drilling, reaming, tapping, and scraping small and medium-sized parts. They are used in machining workshops and mold repair workshops. Compared with similar machine tools at home and abroad, they have the characteristics of low horsepower, high rigidity, high precision, good rigidity, convenient operation, and easy maintenance.

[0003] A bench drill includes the drill body, spindle, drill bit mounted on the spindle, and worktable located directly below the spindle. When drilling boards or other materials, the operator first places the board on the worktable, then starts the bench drill to rotate the spindle and the rotating shaft, and finally controls the spindle to move up and down to drill holes in the board.

[0004] Drilling holes in wooden boards produces waste chips and powder. The powder particles are small, and if they fall to the ground, they will negatively affect the cleaning work after processing. Summary of the Invention

[0005] In order to reduce the adverse effects on post-processing cleaning, this application provides a bench drill.

[0006] The bench drill provided in this application adopts the following technical solution:

[0007] A bench drill includes a drill body, a spindle, a drill bit, and a worktable. A cover is slidably connected to the spindle, and the cover slides along the axial direction of the spindle. The drill bit is located in the cover. An inner ring frame is fixedly connected to the inner top surface of the cover, and the inner ring frame is circumferentially arranged along the circumference of the cover. The lower surface of the inner ring frame is higher than the lower surface of the cover. Several uprights are fixedly connected to the inner top surface of the cover. A brush is hinged to the lower end of each upright, and the upper end of the brush is flush with the lower surface of the cover. The cover is equipped with an adsorption component for adsorbing sawdust and dust, as well as a sealing component.

[0008] By adopting the above technical solution, when drilling holes in a wooden board, the spindle and drill bit move towards the board. The movement of the spindle drives the cover to move. When the lower end of the brush contacts the surface of the board, as the spindle and drill bit continue to move downwards, the brush rotates as the cover moves downwards, gradually bringing the brush into contact with the upper surface of the board. When the lower surface of the cover contacts the board, the drill bit also contacts the board. At this point, the spindle drives the cover and drill bit to rotate, and the rotation of the cover drives the brush to rotate. The rotation of the brush sweeps the sawdust and dust generated during drilling onto the cover. At the edge, the spindle rotates while driving the drill bit downwards. The spindle movement drives the sealing and suction components to work. The sealing component opens the space between the cover and the inner ring frame, while the suction component sucks the sawdust and dust at the edge of the cover into the space between the cover and the inner ring frame. After drilling is completed, the sealing component seals the space between the cover and the inner ring frame, thus keeping the sawdust generated during drilling between the cover and the inner ring frame, reducing the amount of sawdust and dust falling into the workshop, and thus reducing the adverse impact on the cleaning work after processing.

[0009] Optionally, the adsorption assembly includes a central ring plate disposed between the inner ring frame and the cover body. The central ring plate is circumferentially arranged along the circumferential direction of the cover body. The outer side wall of the central ring plate is fitted with the corresponding inner side wall of the cover body, and the inner side wall of the central ring plate is fitted with the outer side wall of the inner ring frame. A pull rope is connected to the lower end of the main shaft. The middle part of the pull rope is connected to the main shaft, and both ends of the pull rope are connected to the upper surface of the central ring plate.

[0010] By adopting the above technical solution, when the main shaft moves downward, the main shaft moves the middle of the pull rope downward. When the middle of the pull rope moves downward, the two ends of the pull rope move upward. The pull rope pulls the middle ring plate upward. The movement of the middle ring plate changes the volume of the space between the cover and the inner ring frame, and changes the pressure between the inner ring frame and the cover. This allows the wood chips and dust on the edge of the cover to be sucked between the cover and the inner ring frame. After drilling is completed, the main shaft pulls the cover upward. The movement of the cover causes the sealing component to work and seal the space between the cover and the inner ring frame, so that the wood chips and dust can remain between the cover and the inner ring frame.

[0011] Optionally, the inner ring frame and the lower part of the cover are sealed off. The sealing assembly includes several sliding baffles that seal the space between the inner ring frame and the cover. The sliding baffles are slidably connected to the lower surface of the inner ring frame. A return spring is connected to the sliding baffle near the inner edge of the cover. The end of the return spring away from the edge of the cover is connected to the inner ring frame. The middle ring plate divides the space between the inner ring frame and the cover into an upper chamber and a lower chamber. A matching rod is hinged to the upper surface of the sliding baffle. The length of the matching rod can be changed. The hinge point between the matching rod and the sliding baffle is located at the edge of the cover. A driving rod is hinged to the upper end of the matching rod. The end of the driving rod away from the matching rod is hinged to the lower surface of the middle ring plate. The hinge point of the driving rod on the middle ring plate is located near the middle of the cover. The upper end of the driving rod is inclined towards the middle of the cover.

[0012] By adopting the above technical solution, in the initial state, the cover is not in contact with the wooden board, and the return spring is in its natural state. When the cover moves to contact the wooden board, as the main shaft continues to move downward, the pull rope pulls the middle ring plate upward. The upward movement of the middle ring plate pulls the drive rod to move. At the same time, the drive rod drives the mating rod to rotate towards the middle of the cover. The rotation of the drive rod moves the sliding baffle towards the middle of the cover, thereby opening the lower chamber. The movement of the sliding baffle stretches the return spring. At the same time, the adsorption component works to suck the wood chips and dust from the edge of the cover into the lower chamber. When the main shaft moves upward, the middle ring plate moves downward due to gravity. At the same time, the return spring returns to its original deformation and pushes the sliding baffle to move, thereby closing the lower chamber and reducing the occurrence of wood chips and dust falling from the lower chamber onto the wooden board.

[0013] Optionally, a bottom ring plate is fixedly connected to the lower surface of the cover. The bottom ring plate is horizontally arranged, and the inner sidewall of the inner ring frame is located between the inner sidewall of the bottom ring plate and the inner sidewall of the cover.

[0014] By adopting the above technical solution, when sawdust and dust fall out of the lower chamber, they fall onto the bottom ring plate, further reducing the possibility of sawdust and dust falling onto the wooden board.

[0015] Optionally, two connecting rods are fixedly connected to the upper surface of the cover. A rotating wheel is rotatably connected to the upper end of the connecting rods. Both connecting rods are located below the pull ropes. One of the pull ropes located on one side of the main shaft is attached to the rotating wheel located on the same side of the main shaft, and the other pull rope located on one side of the main shaft is attached to the rotating wheel located on the same side of the main shaft.

[0016] By adopting the above technical solution, when the pull rope moves, the pull rope drives the rotating wheel to rotate. The rotating wheel and the pull rope roll together, which reduces the wear of the pull rope.

[0017] Optionally, multiple sliding grooves are provided on the outer side wall of the main shaft. The multiple sliding grooves are distributed along the circumference of the main shaft, and the length direction of the sliding grooves is set along the axial direction of the main shaft. Slider blocks corresponding to the sliding grooves are fixedly connected on the cover, and each slider is slidably inserted into the corresponding sliding groove.

[0018] By adopting the above technical solution, the rotation of the main shaft drives the slider and the cover to rotate. When the main shaft moves up and down, the slider and the slide groove cooperate to make the main shaft and the cover slide together.

[0019] Optionally, the lower side of the inner ring frame protrudes towards the center of the cover to form a holding groove.

[0020] By adopting the above technical solution, when drilling for the next time, the main shaft moves downward while the sliding baffle moves towards the middle of the cover. The movement of the sliding baffle carries the sawdust and dust on the sliding baffle into the holding tank, reducing the situation where sawdust and dust generated during the previous drilling fall onto the wooden board.

[0021] Optionally, a guide groove is provided on the upper surface of the sliding baffle, and guide blocks corresponding to the guide groove are fixedly connected to the lower surface of the inner ring frame. Each guide block is slidably inserted into the corresponding guide groove.

[0022] By adopting the above technical solution, when the sliding baffle slides, the guide block cooperates with the guide groove, and the sliding baffle is slidably connected to the inner ring frame.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] By setting up the drilling rig body, spindle, drill bit, worktable, cover, upright, brush, inner ring frame, adsorption components and sealing components, the amount of wood chips and powder falling into the workshop is reduced, thereby reducing the adverse impact on the cleaning work after processing.

[0025] By setting up a pull rope and a central ring plate, the movement of the central ring plate changes the volume of the space between the cover and the inner ring frame, and changes the pressure between the inner ring frame and the cover, thereby sucking the wood chips and dust from the edge of the cover into the space between the cover and the inner ring frame.

[0026] By setting up a sliding baffle, a drive rod, a return spring, and a cooperating rod, the lower chamber is sealed, reducing the amount of sawdust and dust falling onto the wooden board. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the overall structure of the bench drill in an embodiment of this application.

[0028] Figure 2This is a schematic diagram illustrating the positional relationship between the main shaft and the cover in an embodiment of this application.

[0029] Figure 3 This is a cross-sectional view illustrating a portion of the structure of a bench drill in an embodiment of this application.

[0030] Figure 4 This is a cross-sectional view illustrating a portion of the structure of the adsorption component in an embodiment of this application.

[0031] Figure 5 This is a cross-sectional view illustrating a portion of the structure of the sealing component in an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Drilling rig body; 11. Spindle; 111. Slide groove; 112. Connecting block; 113. Connecting ring plate; 1131. Connecting groove; 1132. Guide rod; 12. Drill bit; 13. Worktable; 2. Cover; 21. Slider; 22. Upper chamber; 23. Lower chamber; 3. Inner ring frame; 31. Holding groove; 32. Guide block; 4. Bottom ring plate; 5. Vertical rod; 6. Brush; 7. Adsorption assembly; 71. Middle ring plate; 72. Connecting rod; 73. Pull rope; 74. Support rod; 75. Rotating wheel; 8. Sealing assembly; 81. Matching rod; 811. Sleeve; 812. Compensating spring; 813. Insertion rod; 82. Drive rod; 83. Sliding baffle; 831. Guide groove; 84. Return spring; 9. Pad plate. Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a benchtop drilling machine. (Refer to...) Figure 1 and Figure 2 The bench drill includes a drill body 1, a spindle 11 mounted on the drill body 1, a drill bit 12 mounted on the spindle 11, and a worktable 13 located below the spindle 11; a cover 2 is slidably connected to the spindle 11, the spindle 11 is located at the center of the upper surface of the cover 2, the cover 2 slides along the axial direction of the spindle 11, the cover 2 is cubic in shape, and the bottom of the cover 2 is open.

[0035] A bottom ring plate 4 is fixedly connected to the bottom surface of the cover 2. The bottom ring plate 4 is horizontally set and located inside the cover 2. An inner ring frame 3 is fixedly connected to the inner top surface of the cover 2. The distance between each outer side wall of the inner ring frame 3 and the corresponding inner side wall of the cover 2 is the same. The lower surface of the inner ring frame 3 is located above the bottom ring plate 4. The inner side wall of the inner ring frame 3 is located between the inner side wall of the bottom ring plate 4 and the inner side wall of the cover 2. An annular pad 9 is fixedly connected to the lower surface of the bottom ring plate 4. The inner and outer side walls of the pad 9 are flush with the corresponding side walls of the bottom ring plate 4. The pad 9 is made of soft rubber.

[0036] Two uprights 5 are fixedly connected to the inner top wall of the cover 2. The main shaft 11 is located between the two uprights 5. The lower end face of the uprights 5 is flush with the lower end of the drill bit 12. A brush 6 is hinged to the lower end of each upright 5. The end of the brush 6 away from the upright 5 is located below the bottom ring plate 4. The brush 6 is made of flexible material and can be bent. When the drill press is working to drill holes in the wooden board, the main shaft 11 rotates and drives the drill bit 12 to rotate. At the same time as the main shaft 11 rotates, the main shaft 11 also drives the drill bit 12 to move downward, so that holes can be drilled in the wooden board.

[0037] As the spindle 11 drives the drill bit 12 downwards, the spindle 11 moves, causing the cover 2 to move. When the lower end of the brush 6 contacts the wooden board, the wooden board pushes the brush 6 to rotate as the spindle 11 and the cover 2 continue to move downwards. When the drill bit 12 moves to contact the upper surface of the wooden board, the lower surface of the pad 9 contacts the upper surface of the wooden board, and the brush 6 contacts the upper surface of the wooden board. The drilling position of the wooden board is located inside the cover 2, so the dust and debris generated during the drilling process are all located inside the cover 2. During the drilling process of the drill bit 12, the rotation of the spindle 11 drives the cover 2, the upright 5, and the brush 6 to rotate. The rotation of the brush 6 moves the dust and debris on the wooden board to the bottom ring plate 4. During the rotation of the cover 2, the pad 9 protects the surface of the wooden board and reduces the wear on the surface of the wooden board.

[0038] To better collect the waste on the bottom ring plate 4, the cover 2 is also equipped with an adsorption component 7 and a sealing component 8. While the brush 6 cleans the waste on the wooden board, the sealing component 8 opens, and the adsorption component 7 works to suck the waste on the bottom ring plate 4 into the space between the inner ring frame 3 and the cover 2. When drilling is completed, the spindle 11 and the drill bit 12 move upward. During the movement of the spindle 11, the sealing component 8 seals the space between the inner ring frame 3 and the cover 2, reducing the amount of wood chips and dust that fall outside the cover 2, thereby reducing the adverse effects on the cleaning work after processing.

[0039] Reference Figure 2 , Figure 3 and Figure 4Multiple grooves 111 are provided on the outer side wall of the main shaft 11. The grooves 111 are distributed circumferentially along the main shaft 11, and the length direction of the grooves 111 is arranged along the axial direction of the main shaft 11. Slider 21s corresponding to the grooves 111 are fixedly connected to the cover 2. Each slider 21 is slidably inserted into the corresponding groove 111. In this embodiment, there are two grooves 111. The adsorption assembly 7 includes a central ring plate 71 disposed between the cover 2 and the inner ring frame 3. Each outer side wall of the central ring plate 71 is in contact with the corresponding inner side wall of the cover 2, and the inner side wall of the central ring plate 71 is in contact with the corresponding outer side wall of the inner ring frame 3. The central ring plate 71 divides the space enclosed by the cover 2 and the inner ring frame 3 into an upper chamber 22 and a lower chamber 23. The upper chamber 22 is located above the lower chamber 23.

[0040] Two connecting rods 72 are fixedly connected to the upper surface of the central ring plate 71, and the main shaft 11 is located between the two connecting rods 72. Each connecting rod 72 passes through the upper surface of the cover 2. Two support rods 74 are also vertically fixedly connected to the upper surface of the cover 2. Each support rod 74 is located between the two connecting rods 72, and the main shaft 11 is located between the two support rods 74. A rotating wheel 75 is rotatably connected to the upper end face of each support rod 74.

[0041] A T-shaped vertical connecting block 112 is fixedly connected to the lower side wall of the main shaft 11. The connecting block 112 is annular and is coaxial with the main shaft 11. A connecting ring plate 113 is sleeved on the main shaft 11 and is coaxial with the main shaft 11. A connecting groove 1131 corresponding to the connecting block 112 is opened on the inner side wall of the connecting ring plate 113. The connecting block 112 is slidably inserted into the connecting groove 1131. The connecting block 112 and the connecting groove 1131 cooperate to make the connecting ring plate 113 rotatably connected to the main shaft 11. A guide rod 1132 is vertically fixed on the upper end surface of the connecting ring plate 113. The upper end of the guide rod 1132 passes through the upper surface of the cover 2 and is slidably inserted into the cover 2.

[0042] The adsorption assembly 7 also includes a pull rope 73, the middle of which is fixed to the outer wall of the connecting ring plate 113. The pull rope 73 is simultaneously attached to two rotating wheels 75. One end of the pull rope 73 is fixedly connected to the upper end of one of the connecting rods 72, and the other end of the pull rope 73 is fixedly connected to the upper end of the other connecting rod 72.

[0043] Reference Figure 2 and Figure 5The bottom of the inner ring frame 3 protrudes towards the center of the cover 2 to form a holding groove 31. Two walls of the holding groove 31 contact the corresponding inner walls of the cover 2. The walls of the holding groove 31 that contact the cover 2 are positioned opposite each other. There are gaps between the other two walls of the holding groove 31 and the corresponding inner walls of the cover 2, thereby allowing the lower chamber 23 to communicate with the space inside the cover 2. The sealing assembly 8 includes two sliding baffles 83, both of which are located below the inner ring frame 3. The two sliding baffles 83 correspond to the two sides of the holding groove 31 that do not contact the cover 2. The two sliding baffles 83 cooperate to seal the lower chamber 23.

[0044] Multiple guide grooves 831 are provided on the upper surface of the sliding baffle 83. The guide grooves 831 are arranged along the length direction of the sliding baffle 83 and the length direction of the guide grooves 831 is set along the width direction of the sliding baffle 83. Guide blocks 32 corresponding to the guide grooves 831 are fixedly connected to the lower surface of the inner ring frame 3. Each guide block 32 is slidably inserted into the corresponding guide groove 831. A reset spring 84 is fixedly connected to the side wall of the guide block 32 away from the corresponding side wall of the cover 2. The reset spring 84 is located on the side of the guide block 32 away from the corresponding side wall of the cover 2. The end of the reset spring 84 away from the guide block 32 is fixedly connected to the groove wall of the guide groove 831. When the sliding baffle 83 blocks the lower chamber 23, the reset spring 84 is in the natural state.

[0045] The sealing assembly 8 also includes a mating rod 81 hinged to the sliding baffle 83. The hinge point of the mating rod 81 on the sliding baffle 83 is located on the side of the sliding baffle 83 near the corresponding side wall of the cover 2. The mating rod 81 includes a plug rod 813 hinged to the mating plate. A sleeve 811 is sleeved on the upper end of the plug rod 813. The opening of the sleeve 811 is set downward. A replacement spring 812 is fixedly connected to the inner bottom wall of the sleeve 811. The lower end of the replacement spring 812 is fixedly connected to the upper end face of the plug rod 813. A driving rod 82 is hinged to the outer side wall of the sleeve 811. The end of the driving rod 82 away from the sleeve 811 is hinged to the lower surface of the middle ring plate 71. The hinge point of the driving rod 82 on the middle ring plate 71 is located on the side away from the sleeve 811.

[0046] In the initial state, slider 21 is located at the upper end of groove 111, the lower end face of the upright 5 is flush with the lower end face of drill bit 12, the replacement spring 812 and the return spring 84 are in their natural state, the sliding baffle 83 blocks the lower chamber 23, the middle ring plate 71 is located in the middle of the cover 2, the upper chamber 22 and the lower chamber 23 have the same volume, the drive rod 82 is inclined, and the upper end of the drive rod 82 is inclined away from the sleeve 811. When the bottom ring plate 4 contacts the wooden board, as the main shaft 11 and drill bit 12 continue to move downward, the movement of the main shaft 11 drives slider 21 to move along groove 111.

[0047] While the main shaft 11 moves, it also rotates. As the main shaft 11 rotates, the guide rod 1132 limits the connecting ring plate 113, so that the connecting ring plate 113 does not rotate with the main shaft 11, reducing the possibility of the pull rope 73 getting tangled on the main shaft 11. The movement of the main shaft 11 causes the connecting ring plate 113 and the middle part of the pull rope 73 to move downward, so that the end of the pull rope 73 pulls the connecting rod 72 and the middle ring plate 71 to move upward. During the movement of the pull rope 73, the pull rope 73 drives the rotating wheel 75 to rotate, reducing the possibility of wear on the pull rope 73.

[0048] As the central ring plate 71 moves upward, it drives the drive rod 82 upward. Since the length of the drive rod 82 cannot be changed, it rotates towards the center of the cover 2 as it moves. The rotation of the drive rod 82 drives the sleeve 811 and the insertion rod 813 to rotate, thereby causing the insertion rod 813 to push the sliding baffle 83 towards the center of the cover 2. The movement of the sliding baffle 83 opens the lower chamber 23. At the same time, the movement of the sliding baffle 83 also stretches the return spring 84 and the replacement spring 812. During the drilling process, the main shaft 11 moves downward continuously. At the same time, the pull rope 73 pulls the central ring plate 71 upward. The main shaft 11 also rotates as it moves, driving the brush 6 to rotate. The rotation of the brush 6 sweeps the sawdust and dust on the wooden board onto the bottom ring plate 4.

[0049] The movement of the middle ring plate 71 compresses the upper chamber 22, increasing the space of the lower chamber 23 and decreasing the pressure, making the pressure in the lower chamber 23 less than the pressure at the inner ring frame 3 in the cover 2. This allows the sawdust and dust on the bottom ring plate 4 to be sucked into the lower chamber 23. When drilling is completed, the main shaft 11 moves upward, and at the same time, the middle part of the pull rope 73 also moves upward with the main shaft 11. At this time, the middle ring plate 71 moves downward due to gravity, causing the pull rope 73 to move downward.

[0050] During the movement of the middle ring plate 71, the middle ring plate 71 moves downward by pressing the drive rod 82. During this process, the reset spring 84 restores its deformation and pushes the sliding baffle 83 to move. The movement of the sliding baffle 83 causes the insertion rod 813 to rotate. While the insertion rod 813 rotates, it moves into the sleeve 811. While the insertion rod 813 moves, the replacement spring 812 restores its deformation. When the middle ring plate 71 returns to its initial position, the sliding baffle 83 seals the lower chamber 23 to reduce the amount of sawdust and dust falling onto the wooden board.

[0051] When sawdust and dust fall outside the lower chamber 23, they land on the bottom ring plate 4, further reducing the cleaning work required by the operator. When drilling again, when the drive rod 82 and the connecting rod 813 push the sliding baffle 83 to move, the sliding baffle 83 moves, carrying the sawdust and dust onto the collecting trough 31, reducing the likelihood of sawdust and dust from the previous drilling falling onto the wooden board.

[0052] The implementation principle of a bench drill in this application embodiment is as follows: When drilling, the spindle 11 drives the drill bit 12 and the cover 2 to move downward. When the drill bit 12 contacts the wooden board, the brush 6 contacts the surface of the wooden board. The rotation of the spindle 11 drives the cover 2 and the brush 6 to rotate. The rotation of the brush 6 sweeps the sawdust and dust on the wooden board onto the bottom ring plate 4. When drilling, the spindle 11 and the drill bit 12 move downward. The movement of the spindle 11 causes the pull rope 73 to pull the middle ring plate 71 upward. The movement of the middle ring plate 71 drives the drive rod 82 and the cooperating rod 81 to rotate. The rotation of the cooperating rod 81 pushes the sliding baffle 83 to move, thereby opening the lower chamber 23.

[0053] As the spindle 11 continues to move downward, the middle ring plate 71 moves upward, and the sawdust and dust on the bottom ring plate 4 are sucked into the lower chamber 23. When drilling is completed, the spindle 11 and drill bit 12 move upward, while the middle ring plate 71 moves downward. The return spring 84 and the replacement spring 812 restore their deformation, so that the sliding baffle 83, drive rod 82, sleeve 811 and plug rod 813 return to their initial positions. When drilling for the next time, the sliding baffle 83 moves towards the middle of the cover 2. The movement of the sliding baffle 83 carries the sawdust and dust on the sliding baffle 83 into the holding tank 31.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bench drill comprising a drill body (1), a spindle (11), a drill bit (12) and a worktable (13); characterized in that: The main shaft (11) is slidably connected with a cover body (2), the cover body (2) slides along the axial direction of the main shaft (11), the drill bit (12) is located in the cover body (2), the inner top surface of the cover body (2) is fixedly connected with an inner ring frame (3), the circumferential direction of the inner ring frame (3) is arranged along the circumferential direction of the cover body (2), the lower surface of the inner ring frame (3) is higher than the lower surface of the cover body (2), the inner top surface of the cover body (2) is fixedly connected with a plurality of vertical rods (5), the lower end of the vertical rod (5) is hingedly connected with a brush (6), the upper end surface of the brush (6) is flush with the lower surface of the cover body (2), the cover body (2) is provided with an adsorption assembly (7) and a sealing assembly (8) for adsorbing wood chips and dust. The adsorption assembly (7) comprises a middle ring plate (71) arranged between the inner ring frame (3) and the cover body (2), the circumferential direction of the middle ring plate (71) is arranged along the circumferential direction of the cover body (2), the outer side wall of the middle ring plate (71) is attached to the corresponding inner side wall of the cover body (2), the inner side wall of the middle ring plate (71) is attached to the outer side wall of the inner ring frame (3), the lower end of the main shaft (11) is connected with a pull rope (73), the middle part of the pull rope (73) is connected with the main shaft (11), and the two ends of the pull rope (73) are connected to the upper surface of the middle ring plate (71). The inner ring frame (3) and the lower end part of the cover body (2) are sealingly arranged, the sealing assembly (8) comprises a plurality of sliding baffles (83) for sealing the space between the inner ring frame (3) and the cover body (2), the sliding baffle (83) is slidably connected to the lower surface of the inner ring frame (3), the sliding baffle (83) is connected with a reset spring (84) near the inner edge of the cover body (2), one end of the reset spring (84) away from the edge of the cover body (2) is connected to the inner ring frame (3), the middle ring plate (71) divides the space between the inner ring frame (3) and the cover body (2) into an upper chamber (22) and a lower chamber (23), the upper surface of the sliding baffle (83) is hingedly connected with a matching rod (81), the length of the matching rod (81) can be changed, the hinge point of the matching rod (81) and the sliding baffle (83) is located at the edge of the cover body (2), the upper end of the matching rod (81) is hingedly connected with a driving rod (82), one end of the driving rod (82) away from the matching rod (81) is hingedly connected to the lower surface of the middle ring plate (71), the hinge point of the driving rod (82) on the middle ring plate (71) is located near the middle part of the cover body (2), and the upper end of the driving rod (82) is inclined towards the middle part of the cover body (2).

2. A bench drill according to claim 1, wherein: The lower surface of the cover body (2) is fixedly connected with a bottom ring plate (4), the bottom ring plate (4) is arranged horizontally, and the inner side wall of the inner ring frame (3) is located between the inner side wall of the bottom ring plate (4) and the inner side wall of the cover body (2).

3. A bench drill according to claim 1, wherein: The upper surface of the cover body (2) is fixedly connected with two connecting rods (72), the upper end of the connecting rod (72) is rotatably connected with a rotating wheel (75), and the two connecting rods (72) are located below the pull rope (73). Each pull rope (73) is lapped on the rotating wheel (75) located on the same side of the main shaft (11) and adjacent to the pull rope (73).

4. The bench drill press of claim 1, wherein: A plurality of sliding grooves (111) are formed on the outer side wall of the main shaft (11), the sliding grooves (111) are distributed along the circumference of the main shaft (11), the length direction of the sliding grooves (111) is arranged along the axial direction of the main shaft (11), the cover body (2) is fixedly connected with sliding blocks (21) which are arranged one by one corresponding to the sliding grooves (111), and each sliding block (21) is slidingly inserted into the corresponding sliding groove (111).

5. The bench drill press according to claim 1, wherein: The inner ring frame (3) is formed with a containing groove (31) on the lower side of the middle part of the cover body (2).

6. The bench drill press of claim 1, wherein: The upper surface of the sliding baffle (83) is formed with a guide groove (831), the lower surface of the inner ring frame (3) is fixedly connected with guide blocks (32) which are arranged one by one corresponding to the guide grooves (831), and each guide block (32) is slidingly inserted into the corresponding guide groove (831).

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