Plastic punching and cleaning device
By designing a plastic perforation cleaning device, which uses a sleeve to collect splashed debris, a brush to sweep, a blocking device to prevent dust from scattering, and a knocking device to remove residual debris, the problem of existing equipment being unable to clean and collect plastic debris has been solved, achieving safe and efficient debris treatment.
Patent Information
- Application Number
- CN202210234056.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-03-10
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2042-03-10
AI Technical Summary
Existing drilling equipment cannot effectively clean and collect debris when processing plastic products, resulting in debris pollution of the environment and potential harm to human health.
A plastic drilling and cleaning device was designed, including a machine base, a collection tank, a telescopic rod, a motor, a drill rod, a sleeve, a sweeping device, a blocking device, and a knocking device. The sleeve collects splashed debris, the brush sweeps away the debris, the blocking device prevents dust from scattering, the knocking device cleans up residual debris, and the collection tank collects the debris in a concentrated manner.
It effectively prevents debris from flying, achieves deep cleaning and thorough cleaning, prevents dust from scattering, ensures that debris is collected in a concentrated manner, and reduces environmental pollution and health risks.
Smart Images

Figure CN114633305B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of hole punching, in particular to a plastic hole punching and cleaning device. Background Art
[0002] With the development of our society, plastics are widely used and are indispensable components in home appliances, automobiles, mobile phones, PCs, medical devices, and lighting appliances. In addition, as our economy has achieved sustained and stable growth, industries such as home appliances, automobiles, mobile phones, PCs, and medical devices have also achieved rapid development thanks to a good external environment.
[0003] Most plastic products are plastic products, and they need to be punched frequently during processing. However, existing punching equipment cannot clean and collect plastic debris well. These debris are often handled at will, which not only pollutes the environment, but the debris powder is generally small and may enter water sources and food and be accidentally ingested by people, affecting human health. Summary of the invention
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies in the prior art, the present invention provides a plastic hole-punching cleaning device, which has the advantages of cleaning and collecting debris, and solves the problem of being unable to clean and collect debris.
[0006] (II) Technical solution
[0007] In order to achieve the above-mentioned purpose of cleaning and collecting debris, the present invention provides the following technical solutions: a plastic drilling and cleaning device comprises a machine platform, a base is fixedly installed at the lower end of the machine platform, a U-shaped bracket is fixedly connected to the upper end of the machine platform, a collecting groove is opened inside the machine platform, a No. 1 telescopic rod is fixedly connected to the lower end of the U-shaped bracket, a motor is fixedly connected to the lower end of the No. 1 telescopic rod, a drill rod is rotatably connected to the lower end of the motor, a sleeve is fixedly connected to the lower end of the motor, a No. 2 telescopic rod is fixedly installed on the upper end of the machine platform, a cleaning device is fixedly connected to the left end of the No. 2 telescopic rod, a blocking device is slidably connected to the upper end of the machine platform, a knocking device is fixedly installed on the front and rear ends of the machine platform, a drill hole is opened on the upper end surface of the machine platform, a No. 1 sliding groove is opened on the upper end surface of the machine platform, and a feed port is opened on the upper end surface of the machine platform.
[0008] Preferably, the sleeve includes a No. 1 cylinder, the upper end of the No. 1 cylinder is fixedly connected to a No. 3 telescopic rod, the lower end of the No. 3 telescopic rod is fixedly connected to a No. 2 cylinder, two No. 3 telescopic rods are provided, and the No. 2 cylinder is slidably connected to the No. 1 cylinder via the No. 3 telescopic rod.
[0009] Preferably, the cleaning device includes a brush body, a plurality of No. 1 springs are fixedly connected to the lower end of the brush body, the upper end of the No. 1 spring is fixedly connected to the brush body, the lower end of the No. 1 spring is fixedly connected to the brush, and the brush is slidably connected to the brush body.
[0010] Preferably, the blocking device includes a vertical baffle, the lower end of the vertical baffle is fixedly connected to a horizontal baffle, the left end of the horizontal baffle is fixedly connected to a No. 2 spring, the right end of the No. 2 spring is fixedly connected to the horizontal baffle, and the left end of the No. 2 spring is fixedly connected to the left end of the No. 1 sliding groove.
[0011] Preferably, the knocking device includes a traction rod and a base plate, the end of the traction rod close to the drill rod is fixedly connected to the knocking rod, the end of the base plate close to the No. 1 sliding groove is fixedly connected to the machine, the upper end of the rotating rod is fixedly connected to the traction rod, the lower end of the rotating rod is rotatably connected to the base plate, a torsion spring is arranged on the surface of the rotating rod, the upper end of the torsion spring is fixedly connected to the traction rod, and the lower end of the torsion spring is fixedly connected to the base plate.
[0012] Preferably, the drill hole is located directly below the drill rod, and the size of the drill hole is larger than the size of the drill rod.
[0013] Preferably, the vertical baffle and the transverse baffle are slidably connected to the No. 1 sliding groove, and the size of the transverse baffle is larger than the size of the feed port.
[0014] Preferably, the flipping device includes a flipping plate, the lower end of which is rotatably connected to a guide rod, a second sliding groove is provided on the surface of the machine, and the ends of the cleaning device that are away from each other are fixedly connected to a push rod, which is rotatably connected to the guide rod.
[0015] (III) Beneficial effects
[0016] Compared with the prior art, the present invention provides a plastic hole cleaning device, which has the following beneficial effects:
[0017] 1. The plastic punching and cleaning device can prevent plastic debris from splashing inside the No. 1 cylinder during the punching process, thereby preventing the debris from flying outside and possibly splashing into people's eyes and affecting health. Moreover, the debris is only concentrated inside the No. 1 cylinder, which is convenient for subsequent cleaning and achieves the effect of collecting debris.
[0018] 2. The plastic punching cleaning device uses a brush to clean plastic debris along its moving direction during the cleaning process. A plurality of No. 1 springs are installed at the lower end of the brush body. The No. 1 springs are always in an extruded state, which makes the brush clean more thoroughly and achieves a deep cleaning effect.
[0019] 3. The plastic punching and cleaning device, when not cleaning, blocks the feed port with a blocking device, and opens the feed port when cleaning, so as to prevent the debris and dust from floating out of the feed port due to the shaking of the machine during movement. In addition, when the collection tank is almost full and forgotten to be cleaned, the shaking of the machine can prevent the debris from being shaken out of the feed port.
[0020] 4. The plastic punching cleaning device moves to the left with the vertical baffle. At this time, the traction rod contacts the vertical baffle and rotates away from the machine with the rotating rod as the axis. When the right end of the brush passes the right end of the feed port, the knocking rod just hits the brush, so that the plastic debris remaining on the brush is cleaned, achieving the effect of cleaning the debris and reducing the possibility of the debris adhering to the brush and adhering to the machine again.
[0021] 5. The plastic punching cleaning device can collect the debris cleaned by the cleaning device through the provided collecting groove, thereby achieving the effect of collecting the debris. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is the main structure front view of the present invention;
[0023] Figure 2 It is a top view of the main structure of the present invention;
[0024] Figure 3 It is a schematic diagram of the sleeve structure of the present invention;
[0025] Figure 4 It is a schematic diagram of the structure of the cleaning device of the present invention;
[0026] Figure 5 It is a schematic diagram of the structure of the blocking device of the present invention;
[0027] Figure 6 It is a three-dimensional diagram of the structure of the striking device of the present invention;
[0028] Figure 7 It is a three-dimensional diagram of the structure of the turning device of the present invention;
[0029] Figure 8 It is a schematic diagram of the positions of the cleaning device and the turning device of the present invention.
[0030] In the figure: 1, machine; 2, base; 3, collecting trough; 4, U-shaped bracket; 5, telescopic rod No. 1; 6, motor; 7, drill rod; 8, sleeve; 9, telescopic rod No. 2; 10, cleaning device; 11, blocking device; 12, knocking device; 13, drilling; 14, sliding groove No. 1; 15, feeding port; 16, turning device; 801, cylinder No. 1; 802, telescopic rod No. 3; 803, cylinder No. 2; 1001, brush body; 1002, brush; 1003, spring No. 1; 1101, vertical baffle; 1102, horizontal baffle; 1103, spring No. 2; 1201, traction rod; 1202, knocking rod; 1203, rotating rod; 1204, bottom plate; 1601, turning plate; 1602, guide rod; 1603, sliding groove No. 2; 1604, push rod. DETAILED DESCRIPTION
[0031] 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 described embodiments 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 creative work are within the scope of protection of the present invention.
[0032] See also Figure 1-6 A plastic drilling and cleaning device comprises a machine platform 1, a base 2 is fixedly installed at the lower end of the machine platform 1, a U-shaped bracket 4 is fixedly connected to the upper end of the machine platform 1, a collecting tank 3 is opened inside the machine platform 1, a No. 1 telescopic rod 5 is fixedly connected to the lower end of the U-shaped bracket 4, a motor 6 is fixedly connected to the lower end of the No. 1 telescopic rod 5, a drill rod 7 is rotatably connected to the lower end of the motor 6, and a sleeve 8 is fixedly connected to the lower end of the motor 6.
[0033] In this embodiment, the sleeve 8 includes a No. 1 cylinder 801, the upper end of the No. 1 cylinder 801 is fixedly connected to a No. 3 telescopic rod 802, the lower end of the No. 3 telescopic rod 802 is fixedly connected to a No. 2 cylinder 803, two No. 3 telescopic rods 802 are provided, and the No. 2 cylinder 803 is slidably connected to the No. 1 cylinder 801 through the No. 3 telescopic rod 802.
[0034] During use, after the motor 6 is started, the No. 1 telescopic rod 5 begins to descend, and stops descending when the No. 1 cylinder 801 contacts the plastic placed on the machine 1. At this time, under the action of the No. 3 telescopic rod 802, the No. 2 cylinder 803, the motor 6 and the drill rod 7 continue to descend, and when the drill rod 7 contacts the plastic, drilling begins. During the drilling process, part of the plastic debris enters the collecting tank 3 along the drill hole 13, and the rest of the plastic debris splashes inside the No. 1 cylinder 801. This prevents the debris from flying outside and possibly splashing into people's eyes and affecting health. In addition, the debris is only concentrated inside the No. 1 cylinder 801, which is convenient for subsequent cleaning. When the drilling is completed, the No. 1 telescopic rod 5 retracts, and the No. 1 cylinder 801 retracts under the action of the No. 3 telescopic rod 802 to restore to the initial state.
[0035] A second telescopic rod 9 is fixedly mounted on the upper end of the machine platform 1 , and a cleaning device 10 is fixedly connected to the left end of the second telescopic rod 9 .
[0036] In this embodiment, the cleaning device 10 includes a brush body 1001, a plurality of No. 1 springs 1003 are fixedly connected to the lower end of the brush body 1001, the upper end of the No. 1 spring 1003 is fixedly connected to the brush body 1001, the lower end of the No. 1 spring 1003 is fixedly connected to the brush 1002, and the brush 1002 is slidably connected to the brush body 1001.
[0037] When in use, the No. 2 telescopic rod 9 pushes the cleaning device 10 to move. During the movement, the brush 1002 cleans the plastic debris along its movement direction. A plurality of No. 1 springs 1003 are installed at the lower end of the brush body 1001. The No. 1 springs 1003 are always in an extruded state, which makes the brush 1002 clean more thoroughly. When it moves to the feed port 15, the debris is cleaned into the collection tank 3.
[0038] The two ends of the cleaning device 10 that are away from each other are fixedly connected with a turning device 16 .
[0039] In this embodiment, the flipping device 16 includes a flipping plate 1601, the lower end of the flipping plate 1601 is rotatably connected to a guide rod 1602, a second sliding groove 1603 is provided on the surface of the machine 1, and the ends of the cleaning device 10 that are away from each other are fixedly connected to a push rod 1604, which is rotatably connected to the guide rod 1602.
[0040] When in use, as the cleaning device 10 moves forward, the brush body 1001 drives the push rod 1604 to move forward synchronously, and the push rod 1604 drives the guide rod 1602 to move in the second sliding groove 1603. At this time, the angle between the guide rod 1602 and the horizontal plane becomes smaller and smaller, and the flip plate 1601 begins to flip downward. At this time, the debris at the edge will fall into the collection groove 3 as the flip plate 1601 flips, so that the debris at the edge that is difficult to clean can be cleaned. When the cleaning device 10 returns, the guide rod 1602 drives the flip plate 1601 to flip in the opposite direction, and the flip plate 1601 gradually returns to its original position.
[0041] A blocking device 11 is slidably connected to the upper end of the platform 1 .
[0042] In this embodiment, the blocking device 11 includes a vertical baffle 1101, the lower end of the vertical baffle 1101 is fixedly connected to a horizontal baffle 1102, the left end of the horizontal baffle 1102 is fixedly connected to a No. 2 spring 1103, the right end of the No. 2 spring 1103 is fixedly connected to the horizontal baffle 1102, and the left end of the No. 2 spring 1103 is fixedly connected to the left end of the No. 1 sliding groove 14.
[0043] During use, when the brush 1002 is about to reach the feed port 15, the brush body 1001 contacts the vertical baffle 1101 and drives the vertical baffle 1101 to move to the left. The vertical baffle 1101 is fixedly connected to the transverse baffle 1102, so the transverse baffle 1102 also moves forward. At this time, the feed port 15 is opened. When the No. 2 telescopic rod 9 is retracted, the vertical baffle 1101 and the transverse baffle 1102 move to the right under the action of the No. 2 spring 1103 to block the feed port 15.
[0044] Beating devices 12 are fixedly installed at both the front and rear ends of the machine platform 1 .
[0045] In this embodiment, the knocking device 12 includes a traction rod 1201 and a base plate 1204, the traction rod 1201 is fixedly connected to the knocking rod 1202 at one end close to the drill rod 7, the base plate 1204 is fixedly connected to the machine 1 at one end close to the No. 1 sliding groove 14, the upper end of the rotating rod 1203 is fixedly connected to the traction rod 1201, the lower end of the rotating rod 1203 is rotatably connected to the base plate 1204, a torsion spring is arranged on the surface of the rotating rod 1203, the upper end of the torsion spring is fixedly connected to the traction rod 1201, and the lower end of the torsion spring is fixedly connected to the base plate 1204.
[0046] During use, when the vertical baffle 1101 moves to the left, the traction rod 1201 contacts the vertical baffle 1101 and rotates away from the machine 1 with the rotating rod 1203 as the axis. When the right end of the brush 1002 passes the right end of the feed port 15, the knocking rod 1202 just knocks the brush 1002. When the knocking is completed, the cleaning device 10 moves to the right, and the traction rod 1201 is reset under the action of the torsion spring.
[0047] A drill hole 13 is provided on the upper end surface of the machine 1, and the position of the drill hole 13 is directly below the drill rod 7. The size of the drill hole 13 is larger than the size of the drill rod 7. A No. 1 sliding groove 14 is provided on the upper end surface of the machine 1. A feed port 15 is provided on the upper end surface of the machine 1. The vertical baffle 1101 and the horizontal baffle 1102 are slidably connected to the No. 1 sliding groove 14, and the size of the horizontal baffle 1102 is larger than the size of the feed port 15.
[0048] Working principle: the upper end of the sleeve 8 is fixedly connected to the lower end of the motor 6. When in use, after the motor 6 is started, the No. 1 telescopic rod 5 begins to descend, and stops descending when the No. 1 cylinder 801 contacts the plastic placed on the machine 1. At this time, under the action of the No. 3 telescopic rod 802, the No. 2 cylinder 803, the motor 6 and the drill rod 7 continue to descend, and when the drill rod 7 contacts the plastic, drilling begins. During the drilling process, part of the plastic debris flows along the drill hole 13 into the collecting tank 3, and the other plastic debris splashes inside the No. 1 cylinder 801, so as to prevent the debris from flying outside and possibly splashing into people's eyes and affecting health, and the debris is only concentrated inside the No. 1 cylinder 801, which is convenient for subsequent cleaning. When the drilling is completed, the No. 1 telescopic rod 5 is retracted, and the No. 1 cylinder The cylinder 801 retracts under the action of the third telescopic rod 802 and returns to its initial state; at this time, the second telescopic rod 9 pushes the cleaning device 10 to move. During the advancement of the cleaning device 10, the brush body 1001 drives the push rod 1604 to move forward synchronously, and the push rod 1604 drives the guide rod 1602 to move in the second sliding groove 1603. At this time, the angle between the guide rod 1602 and the horizontal plane becomes smaller and smaller, and the flip plate 1601 begins to flip downward. At this time, the debris at the edge will fall into the collection groove 3 as the flip plate 1601 flips, so that the debris at the edge that is difficult to clean can be cleaned. When the cleaning device 10 returns, the guide rod 1602 drives the flip plate 1601 to flip in the opposite direction, and the flip plate 1601 gradually returns to its original position. The middle brush 1002 cleans the plastic debris along its moving direction, and a plurality of No. 1 springs 1003 are installed at the lower end of the brush body 1001, and the No. 1 springs 1003 are always in an extruded state, so that the brush 1002 cleans more thoroughly; when the brush 1002 is about to reach the feed port 15, the brush body 1001 contacts the vertical baffle 1101 and drives the vertical baffle 1101 to move to the left, and the vertical baffle 1101 is fixedly connected to the transverse baffle 1102, so the transverse baffle 1102 also moves forward, and the feed port 15 is opened at this time, and the plastic debris enters the collecting tank 3 from the feed port 15, and as the vertical baffle 1101 moves to the left, the traction rod 1201 contacts the vertical baffle 1101 and rotates with the rotating rod 1203 as the rotating rod 1203. The axis rotates away from the machine 1. When the right end of the brush 1002 passes the right end of the feed port 15, the knocking rod 1202 just knocks the brush 1002, so that the plastic debris remaining on the brush 1002 is cleaned up, making the cleaning effect better. After the knocking is completed, the cleaning device 10 moves to the right, and the traction rod 1201 is reset under the action of the torsion spring; when the No. 2 telescopic rod 9 is retracted, the vertical baffle 1101 and the horizontal baffle 1102 move to the right under the action of the No. 2 spring 1103 to block the feed port 15, thereby preventing the machine from shaking during movement and causing debris and dust to float out of the feed port 15. In addition, when the collecting tank 3 is almost full and forgotten to be cleaned, the debris can be prevented from being shaken out of the feed port 15 when the machine shakes.
[0049] In summary, in the plastic punching and cleaning device, plastic debris splashes inside the No. 1 cylinder 801 during the punching process, thus preventing the debris from flying outside and possibly splashing into people's eyes and affecting health, and the debris is only concentrated inside the No. 1 cylinder 801, which is convenient for subsequent cleaning and achieves the effect of collecting debris; during the cleaning process, the brush 1002 cleans the plastic debris along its movement direction, and a plurality of No. 1 springs 1003 are installed at the lower end of the brush body 1001, and the No. 1 springs 1003 are always in an extruded state, which makes the brush 1002 clean more thoroughly and achieves the effect of deep cleaning; when not cleaning, the blocking device 11 blocks the feed port 15, and opens the feed port 15 during cleaning, thus preventing the machine from When the machine moves, it shakes, causing debris and dust to float out of the feed port 15. In addition, when the collection tank 3 is almost full and forgotten to be cleaned, the shaking of the machine can prevent the debris from being shaken out of the feed port 15; as the vertical baffle 1101 moves to the left, the traction rod 1201 contacts the vertical baffle 1101 and rotates away from the machine 1 with the rotating rod 1203 as the axis. When the right end of the brush 1002 passes the right end of the feed port 15, the knocking rod 1202 just hits the brush 1002, thereby cleaning the plastic debris remaining on the brush 1002, thereby achieving the effect of cleaning the debris; the debris cleaned by the cleaning device 10 can be collected together through the set collection tank 3, thereby achieving the effect of collecting debris.
[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A plastic hole cleaning device, comprising a machine (1), characterized in that: The lower end of the machine (1) is fixedly mounted with a base (2), the upper end of the machine (1) is fixedly connected with a U-shaped bracket (4), a collecting tank (3) is provided inside the machine (1), the lower end of the U-shaped bracket (4) is fixedly connected with a first telescopic rod (5), the lower end of the first telescopic rod (5) is fixedly connected with a motor (6), the lower end of the motor (6) is rotatably connected with a drill rod (7), the lower end of the motor (6) is fixedly connected with a sleeve (8), and the upper end of the machine (1) is fixedly mounted with a second telescopic rod (9) The left end of the second telescopic rod (9) is fixedly connected to a cleaning device (10), the upper end of the machine (1) is slidably connected to a blocking device (11), the front and rear ends of the machine (1) are fixedly installed with a knocking device (12), the upper end surface of the machine (1) is provided with a drill hole (13), the upper end surface of the machine (1) is provided with a first sliding groove (14), the upper end surface of the machine (1) is provided with a feed port (15), and the two ends of the cleaning device (10) that are away from each other are fixedly connected to a flipping device (16); The cleaning device (10) comprises a brush body (1001), a plurality of No. 1 springs (1003) are fixedly connected to the lower end of the brush body (1001), the upper end of the No. 1 spring (1003) is fixedly connected to the brush body (1001), the lower end of the No. 1 spring (1003) is fixedly connected to the brush (1002), and the brush (1002) is slidably connected to the brush body (1001); The blocking device (11) comprises a vertical baffle (1101), the lower end of the vertical baffle (1101) is fixedly connected to a horizontal baffle (1102), the left end of the horizontal baffle (1102) is fixedly connected to a No. 2 spring (1103), the right end of the No. 2 spring (1103) is fixedly connected to the horizontal baffle (1102), and the left end of the No. 2 spring (1103) is fixedly connected to the left end of the No. 1 sliding groove (14); The knocking device (12) comprises a traction rod (1201) and a bottom plate (1204); one end of the traction rod (1201) close to the drill rod (7) is fixedly connected to the knocking rod (1202); one end of the bottom plate (1204) close to the first sliding groove (14) is fixedly connected to the machine platform (1); the upper end of the rotating rod (1203) is fixedly connected to the traction rod (1201); the lower end of the rotating rod (1203) is rotatably connected to the bottom plate (1204); a torsion spring is arranged on the surface of the rotating rod (1203); the upper end of the torsion spring is fixedly connected to the traction rod (1201); and the lower end of the torsion spring is fixedly connected to the bottom plate (1204); The vertical baffle (1101) and the horizontal baffle (1102) are slidably connected to the first sliding groove (14), and the size of the horizontal baffle (1102) is larger than the size of the feed port (15); The flipping device (16) comprises a flipping plate (1601), the lower end of the flipping plate (1601) is rotatably connected to a guide rod (1602), a second sliding groove (1603) is provided on the surface of the machine platform (1), and the ends of the cleaning device (10) that are away from each other are fixedly connected to a push rod (1604), and the push rod (1604) is rotatably connected to the guide rod (1602).
2. A plastic hole cleaning device according to claim 1, characterized in that: The sleeve (8) comprises a No. 1 cylinder (801), the upper end of the No. 1 cylinder (801) is fixedly connected to a No. 3 telescopic rod (802), the lower end of the No. 3 telescopic rod (802) is fixedly connected to a No. 2 cylinder (803), two No. 3 telescopic rods (802) are provided, and the No. 2 cylinder (803) is slidably connected to the No. 1 cylinder (801) via the No. 3 telescopic rod (802).
3. The plastic hole cleaning device according to claim 1, characterized in that: The position of the drill hole (13) is directly below the drill rod (7), and the size of the drill hole (13) is larger than the size of the drill rod (7).
Citation Information
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