Point fit mounting structure for drilling machine

Abstract

The present invention relates to a structure capable of selectively mounting a tooth and a point fit used as a cutter for a drilling machine. The mounting structure of a point pit for a drilling machine according to the present invention has a configuration comprising a point pit (500) for digging out rocks or gravel, and a holder (200, 300) that supports the point pit (500) or the tooth (100) so as to be fixedly mounted on the outside of a drum; the point pit (500) is mounted at an angle to the holder (200, 300), and a point pit holder (600) is further provided between the point pit (500) and the holder (200, 300) to guide one end of the point pit (500) to be detachably mounted to the holder (200, 300). In addition, the holder (200, 300) is formed with a tooth mounting groove (202) into which a tooth (100) is inserted and mounted, a point mounting groove (204) into which the point fit (500) and the point fit holder (600) are inserted and mounted, and a pair of inclined surfaces (206) that are in contact with and supported by the side of the point fit holder (600). According to the present invention, there is an advantage of cost reduction and improved work efficiency.

Description

Technology Field

[0001] The present invention relates to a mounting structure for a point pit for a drilling machine, and more specifically, to a structure in which a tooth used as a cutter for a drilling machine and a point pit can be selectively mounted. Background Technology

[0002] Typically, a piercer refers to a machine that excavates the inside of a pipe by pressing in a casing tube, enabling the creation of highly reliable supporting piles while maintaining the ground conditions.

[0003] Cutter bits for drilling underground are used at the ends of these drilling rigs, and such cutter bits are often attached to rotatable drums or similar devices to excavate specific shapes underground.

[0004] Cutter bits need to have high strength because they excavate by colliding with strong materials such as rocks underground. Accordingly, Korean Registered Patent No. 10-2543806 and others disclose a BC cutter tooth technology for a drilling machine in which a tooth tip is welded to the tooth body of the BC cutter tooth and a build-up portion is formed to reinforce the hardness and strength of the BC cutter tooth.

[0005] However, these conventional technologies have the disadvantage that they do not include details regarding strength reinforcement or installation structures for teeth, also known as teeth, and cannot mount a pointed cone-shaped cutter, also known as a point pit. In other words, in conventional technologies, a point pit cannot be mounted on a tooth holder, so a separate holder must be manufactured and used to support the point pit in order to install it, which results in reduced work efficiency and is cumbersome. Prior art literature

[0006] Korean Registered Patent No. 10-2543806 The problem to be solved

[0007] Accordingly, the objective of the present invention is to solve the problems of the prior art as described above by providing a point-fit mounting structure for a drilling machine equipped with a holder capable of mounting both a tooth for the drilling machine and a point-fit. means of solving the problem

[0008] According to the features of the present invention for achieving the above-mentioned purpose, the mounting structure of a point pit for a drilling machine according to the present invention has a configuration comprising a point pit (500) for excavating rocks or gravel, and a holder (200, 300) that supports the point pit (500) or the tooth (100) so as to be fixedly mounted on the outer side of a drum; the point pit (500) is mounted at an angle to the holder (200, 300), and a point pit holder (600) is further provided between the point pit (500) and the holder (200, 300) to guide one end of the point pit (500) to be detachably mounted to the holder (200, 300).

[0009] The holder (200, 300) is characterized by having a tooth mounting groove (202) into which a tooth (100) is inserted and mounted, a point mounting groove (204) into which a point fit (500) and a point fit holder (600) are inserted and mounted, and a pair of inclined surfaces (206) that are in contact with and supported by the side of the point fit holder (600).

[0010] The above point fit (500) has a configuration comprising a bite portion (510) having a conical shape, a body portion (520) formed in a cylindrical shape to support the bite portion (510), and a receiving portion (530) extending from one end of the body portion (520) and inserted into the point fit holder (600); and is characterized in that a holder receiving hole (610) into which the receiving portion (530) is inserted is formed through the interior of the point fit holder (600).

[0011] The holder receiving hole (610) of the point fit holder (600) is formed with a step and has a configuration including a first hole (612) that is open so that one end of the point fit (500) is inserted to one side, and a second hole (614) having an inner diameter smaller than that of the first hole (612); the receiving end (530) is characterized by including a first end (532) that is extended from one end of the body part (520) and inserted into and received in the first hole (612), and a second end (534) that is extended from the first end (532) to one side and formed to have an outer diameter corresponding to the inner diameter of the second hole (614) and received inside the second hole (614).

[0012] The above holder (200, 300) has a configuration including an inner holder (200) to which the point fit (500) and the point fit holder (600) or the tooth (100) are detachably coupled in one direction, and an outer holder (300) to which the inner holder (200) is detachably coupled in one direction; the inner holder (200) and the outer holder (300) are characterized by having a configuration in which they are fastened and fixed to each other by a fixing pin (400) having elasticity due to its own shape or material. Effects of the invention

[0013] The mounting structure of a point pit for a drilling machine according to the present invention has the following effects.

[0014] First, the present invention is provided with a pair of holders for selectively fixing teeth or point pits to the drum of a drilling machine, etc. Accordingly, since the holder (inner holder) can be used for both mounting teeth or point pits, there is an advantage of reducing costs and making the work convenient.

[0015] In addition, the present invention is configured to be detachable not only between the inner holder and the outer holder, but also between the teeth and the holder, and between the point fit and the holder. Therefore, even if the teeth or the point fit are worn out or damaged due to prolonged operation, or if one of the pair of holders is damaged, only the damaged part needs to be replaced instead of the entire set, which has the effect of reducing costs and improving work efficiency.

[0016] In addition, the present invention uses a fixing pin made of plastic material for coupling and fixing holders to one another. Furthermore, a plurality of pin grooves are formed in this fixing pin, so that it possesses a certain elasticity due to its own shape or material. Therefore, since this fixing pin is inserted into the pin hole by a press fit, there is an advantage in that the fastening of holders is facilitated. Brief explanation of the drawing

[0017] FIG. 1 is an exploded perspective view showing one embodiment of a mounting structure for a tooth for a drilling machine. FIG. 2 is an exploded perspective view showing one embodiment of a point-fit mounting structure for a drilling machine according to the present invention. FIG. 3 is a partial plan view showing one embodiment of a point-fit mounting structure for a drilling machine according to the present invention. FIG. 4 is a perspective view showing the configuration of an inner holder constituting an embodiment of the present invention. FIG. 5 is a perspective view showing the configuration of a point fit constituting an embodiment of the present invention. FIG. 6 is a cross-sectional view showing the configuration of a point fit holder constituting an embodiment of the present invention. Specific details for implementing the invention

[0018] The mounting structure of a point pit for a drilling machine according to the present invention will be described in detail below with reference to the attached drawings.

[0019] First, FIG. 1 illustrates an embodiment of a tooth mounting structure for a drilling machine.

[0020] As illustrated in the drawing, the tooth mounting structure for a drilling machine may be composed of a tooth (100) for digging out rocks or gravel, an inner holder (200) to which the tooth (100) is detachably coupled in one direction, an outer holder (300) to which the inner holder (200) is detachably coupled in one direction, and a fixing pin (400) for fastening the tooth (100) and the inner holder (200) or fastening the inner holder (200) and the outer holder (300).

[0021] The above teeth (100) can be used as a tool to crush and excavate soil, gravel, or rocks, etc., for drilling pile holes in the ground.

[0022] Therefore, a number of such teeth (100) may be installed on the outer surface of a drum (not shown) such as a drill (not shown), and one or more holders (200, 300) may be required for the installation and mounting of such teeth (100).

[0023] As shown in the illustration, the above teeth (100) are configured such that one end is inserted into the holder (200, 300), and the other end protrudes outward from the holder (200, 300) to function to crush or excavate soil, gravel, rocks, etc. underground.

[0024] The tooth (100) may have a tooth receiving portion (110) formed therein for mounting with the inner holder (200), and the present invention exemplifies a case in which the tooth receiving portion (110) has a shape that is recessed inward from the side and rear of the tooth (100).

[0025] A bite (120) may be mounted on the tip of the tooth (100), and it is preferable that such a bite (120) be made of a material with high hardness, such as a hard metal, and be formed to protrude forward from the tip of the tooth (100).

[0026] It is preferable that the above bite (120) be firmly fixed to the above tooth (100) by welding or the like.

[0027] A weld line (130) may be provided on the surface of the tooth (100). The weld line (130) may be a part where welding is performed to reinforce the strength of the tooth (100) by additionally welding the surface of the tooth (100), or to cut and install a new bite (120) when the bite (120) is worn out.

[0028] In addition, it may be possible to reinforce the strength of the tooth (100) through additional welding on such a weld line (130). That is, it is desirable to reinforce the strength by increasing the thickness of the weld line (130) portions on the upper and lower surfaces of the tooth (100) by about 3 mm. This reinforcement is necessary because the weld line (130) portion of the tooth (100) is severely worn and sinks during excavation work.

[0029] In this way, the weld line (130) is made perpendicular to the longitudinal direction of the tooth (100) to strengthen the strength of the tooth (100) through welding in this part. That is, when the tooth (100) is mounted radially on the outside of a drum (not shown), the tooth (100) excavates the ground by the rotation of the drum, and at this time, the external force applied to the bite (120) can act most strongly in a direction perpendicular to the longitudinal direction of the tooth (100) or a similar direction, so this is to increase the force to counteract such external force.

[0030] The above fixing pin (400) can serve to fasten and secure the above tooth (100) to the inner holder (200) as illustrated.

[0031] Pin holes (H) of corresponding positions and sizes may be formed in the above teeth (100), the above inner holder (200), and the above inner holder (200) and outer holder (300). And, by inserting the above fixing pin (400) through the pin hole (H) vertically, the above teeth (100) and the above inner holder (200), and the above inner holder (200) and outer holder (300) may be joined to each other.

[0032] The above fixing pin (400) may be made of plastic material. That is, the above fixing pin (400) is preferably made of a material that has strength and a certain elasticity.

[0033] In addition, two or more pin grooves (402) may be formed on the outer surface of the above-mentioned fixing pin (400) so as to be recessed inward. In the present invention, an example is provided in which four pin grooves (402) are formed on the front, back, left, and right sides of the fixing pin (400) at equal angles of 90 degrees from the upper and lower centerlines.

[0034] The pin groove (402) can have an elastic effect by allowing the diameter of the outer surface to change by a predetermined amount due to its own shape when an external force in the circumferential direction is applied to the fixing pin (400).

[0035] Accordingly, the fixing pin (400) can be coupled to the pin hole (H) by a press fit. The fact that the fixing pin (400) can be coupled to the pin hole (H) by a press fit in this way is possible due to the material of the fixing pin (400) and the effect of forming the pin groove (402), and the coupling between the tooth (100) and the inner holder (200) becomes robust due to the press fit of the fixing pin (400).

[0036] The inner holder (200) may be formed to surround the left and right sides and the rear of the tooth (100). That is, as illustrated, the inner holder (200) is formed in the shape of '∩' (when viewed from above in FIG. 2) and has a tooth mounting groove (202) on the inside where the tooth (100) is coupled and positioned, and the tooth (100) can be received and coupled in the inner tooth mounting groove (202) of the inner holder (200).

[0037] A tooth protrusion (210) may be formed protruding inwardly on the inner side of the inner holder (200). It is preferable that the tooth protrusion (210) of the inner holder (200) has a shape and size corresponding to the tooth receiving portion (110) formed on the outer surface of the tooth (100).

[0038] And as described, the pinhole (H) formed in the inner holder (200) can be formed vertically to penetrate at least a part of the tooth protrusion (210).

[0039] A holder receiving portion (220) may be formed on the outer surface of the inner holder (200).

[0040] The holder receiving portion (220) is intended to allow the inner holder (200) to be coupled with the outer holder (300), and as illustrated, it may be formed to be recessed inward from the side and rear of the inner holder (200).

[0041] The outer holder (300) may be formed to surround the inner holder (200). That is, it may be formed to surround the side and rear of the inner holder (200), excluding the front part where the tooth (100) is mounted.

[0042] The above outer holder (300) can be fixedly mounted on the outer surface of a rotating drum (not shown) equipped in a machine such as an excavator or a drilling machine.

[0043] As illustrated, a receiving portion (302) in the shape of an '∩' (when viewed from above) may be formed on the inner side of the outer holder (300), and the inner holder (200) may be received and coupled in this receiving portion (302).

[0044] A holder protrusion (310) protruding inward can be formed on the inner surface of the outer holder (300).

[0045] It is preferable that the holder protrusion (310) of the outer holder (300) and the holder receiving portion (220) of the inner holder (200) are formed to have corresponding shapes and sizes and are joined together.

[0046] One or more pinholes (H) for coupling the inner holder (200) and the outer holder (300) may also be formed in the outer holder (300). That is, the pinholes (H) may be formed to penetrate at least a portion of the holder protrusion (310) of the outer holder (300) vertically.

[0047] In this way, at least two of the above teeth (100), inner holder (200), and outer holder (300) may have pin holes (H) formed at corresponding positions into which the fixing pin (400) is inserted.

[0048] These pinholes (H) may have a hole shape that penetrates vertically or a groove shape that is partially open.

[0049] Meanwhile, it is necessary to strengthen the strength of the end portion of the holder (200, 300) by welding to reinforce the thickness, similar to the weld line (130) portion of the tooth (100). That is, during excavation work, the tooth (100) as well as the end portion of the holder (200, 300) are submerged in sand or mud, causing wear, so it is necessary to reinforce the end portion of the holder (200, 300) by increasing its thickness.

[0050] FIGS. 2 to 6 illustrate a mounting structure for a point fit for a drilling machine according to the present invention. Specifically, FIGS. 2 and FIGS. 3 respectively show an exploded perspective view and a partial plan view showing an embodiment of the mounting structure for a point fit for a drilling machine according to the present invention. FIGS. 4 and FIGS. 5 respectively show a perspective view showing the configuration of an inner holder and a point fit constituting an embodiment of the present invention, and FIGS. 6 shows a cross-sectional view showing the configuration of a point fit holder constituting an embodiment of the present invention.

[0051] In the following, redundant descriptions of the configuration of the holder (200, 300) described above are omitted.

[0052] As illustrated in the drawing, the mounting structure of a point pit for a drilling machine according to the present invention may include a point pit (500) for digging out rocks or gravel, and a holder (200, 300) that supports the point pit (500) or tooth (100) so that it is fixedly mounted on the outside of a drum.

[0053] In addition, a separate point fit holder (600) may be further provided to combine the point fit (500) with the holder (200, 300).

[0054] As explained above, the holder (200, 300) may be composed of an inner holder (200) to which the point fit (500) and the point fit holder (600) or the tooth (100) are detachably coupled in one direction, and an outer holder (300) to which the inner holder (200) is detachably coupled in one direction.

[0055] In addition, the inner holder (200) and the outer holder (300) can be fastened and fixed to each other by the fixing pin (400), which has elasticity due to its own shape or material.

[0056] Of course, additional welding work may be performed to secure the point fit (500) and point fit holder (600) to the inner holder (200), and additional welding work may be performed to firmly secure the connection between the inner holder (200) and the outer holder (300).

[0057] The point fit (500) can be mounted at an angle to the holder (200, 300). That is, the tooth (100) is configured to be inserted or separated in the front-rear direction of the inner holder (200), but the point fit (500) can be configured to be mounted to the inner holder (200) at a predetermined angle to the left.

[0058] The above point fit (500) may be composed of a bite portion (510) having a conical shape, a body portion (520) formed in a cylindrical shape to support the bite portion (510), and a receiving portion (530) extending from one end of the body portion (520) and inserted into the point fit holder (600).

[0059] The above bite portion (510) can be made of a material with high hardness, such as a hard metal, just like the bite (120) formed at the tip of the tooth (100).

[0060] The above body part (520) may be formed in a cylinder or cylindrical shape having a predetermined diameter, and as illustrated, may have an uneven shape with concave grooves or protrusions formed on the surface.

[0061] The receiving portion (530) is a part that is inserted into the point fit holder (600). Accordingly, it is preferable that the receiving portion (530) be formed to have a length corresponding to that of the point fit holder (600).

[0062] The above receiving section (530) may be composed of a first section (532) that is formed extending from one end of the body section (520) and inserted into and received in the first hole (612) of the point fit holder (600) described below, and a second section (534) that is formed extending to one side from the first section (532) and is formed to have an outer diameter corresponding to the inner diameter of the second hole (614) of the point fit holder (600) described below and is received inside the second hole (614).

[0063] And as described, a step (536) may be further formed between the first stage (532) and the second stage (534), and this step (536) may be formed to have an outer diameter larger than the outer diameter of the first stage (532) and the second stage (534).

[0064] It is preferable that the step (536) is formed to have an outer diameter corresponding to the inner diameter of the first hole (612) of the point fit holder (600) described below, so that the step (536) does not pass through the second hole (614) of the point fit holder (600) and remains inside the first hole (612).

[0065] As described above, a point fit holder (600) may be further provided between the point fit (500) and the holder (200, 300) to guide one end of the point fit (500) to be detachably mounted on the holder (200, 300).

[0066] And, inside this point fit holder (600), a holder receiving hole (610) into which the receiving end (530) is inserted is formed through in the longitudinal direction.

[0067] The holder receiving hole (610) of the above point fit holder (600) may be formed with a step. That is, it may have a step corresponding to the receiving end (530) of the above point fit (500).

[0068] Specifically, as described above, the holder receiving hole (610) of the point fit holder (600) may be composed of a first hole (612) that is opened to allow one end of the point fit (500) to be inserted to one side, and a second hole (614) having an inner diameter smaller than that of the first hole (612).

[0069] When configured in this way, as described above, the first section (532) of the receiving section (530) is inserted into and received in the first hole (612) of the point fit holder (600), and the second section (534) of the receiving section (530) can be received inside the second hole (614) of the point fit holder (600).

[0070] The receiving end (530) of the point fit (500) can be inserted and received from the left (as seen in FIG. 6) to the right into the holder receiving hole (610) of the point fit holder (600).

[0071] Meanwhile, the holder (200, 300) may each have a tooth mounting groove (202) into which the tooth (100) is inserted and mounted, a point mounting groove (204) into which the point fit (500) and the point fit holder (600) are inserted and mounted, and a pair of inclined surfaces (206) in which the side of the point fit holder (600) is in contact and supported.

[0072] The point mounting groove (204) is configured to allow the point fit holder (600) to be mounted at an angle on the inner holder (200), and may be formed in a shape that is recessed from the inner surface of the inner holder (200) toward the outside.

[0073] As illustrated, the inclined surface (206) may be formed to face each other on the inner end of the inner holder (200), which is formed in a '∩' shape, and the side of the point fit holder (600) comes into contact with this inclined surface (206).

[0074] Accordingly, it is preferable that the distance (L) between the pair of inclined surfaces (206) is formed to have a size corresponding to the outer diameter (M) of the point fit holder (600), so that the point fit holder (600) combined with the point fit (500) is inserted between the pair of inclined surfaces (206).

[0075] After the point fit (500) and the point fit holder (600) are mounted on the holder (200, 300) by the point fit mounting structure having such a configuration, each component can be more firmly connected to the drum of the drilling machine through welding work, etc.

[0076] The scope of the present invention is not limited to the embodiments exemplified above, and within such technical scope, many other variations based on the present invention will be possible to those skilled in the art.

[0077] For example, in the above embodiment, a holder protrusion (310) protruding inward is formed on the inner surface of the outer holder (300), and a holder receiving portion (220) is formed on the outer surface of the inner holder (200) so as to be recessed inward. However, such a holder protrusion (310) and a holder receiving portion (220) may not be formed. Explanation of the symbols

[0078] 100. TIS 110. TIS reception part 200. Inner holder 202. Teeth mounting groove 204. Holder mounting groove 206. Inclined surface 210. Teeth protrusion 220. Holder receiving part 300. Outer holder 310. Holder protrusion 400. Fixing pin 402. Pin groove 500. Point Fit 510. Bite Part 520. Body section 530. Reception unit 600. Point holder 610. Holder receiving hole H. Pinhole

Claims

Claim 1 The device has a configuration comprising a point pit (500) for excavating rocks or gravel, and a holder (200, 300) that supports the point pit (500) or the tooth (100) so that they are fixedly mounted on the outer side of a drum; the point pit (500) is mounted obliquely on the holder (200, 300), and a point pit holder (600) is further provided between the point pit (500) and the holder (200, 300) to guide one end of the point pit (500) to be detachably mounted on the holder (200, 300); and the holder (200, 300) has a tooth mounting groove (202) into which the tooth (100) is inserted and mounted, a point mounting groove (204) into which the point pit (500) and the point pit holder (600) are inserted and mounted, and a pair of inclined surfaces (206) that are in contact with and supported by the side of the point pit holder (600). Mounting structure of a point fit for a drilling machine, characterized by each being formed. Claim 2 delete Claim 3 In claim 1, the point fit (500) has a configuration comprising a bite portion (510) having a conical shape, a body portion (520) formed in a cylindrical shape to support the bite portion (510), and a receiving portion (530) extending from one end of the body portion (520) and inserted into the point fit holder (600); and a holder receiving hole (610) into which the receiving portion (530) is inserted is formed through the inside of the point fit holder (600), characterized in that it is a mounting structure for a point fit for a drilling machine. Claim 4 In claim 3, the holder receiving hole (610) of the point fit holder (600) is formed in a stepped manner and has a configuration including a first hole (612) that is open so that one end of the point fit (500) is inserted to one side, and a second hole (614) having an inner diameter smaller than that of the first hole (612); and the receiving end (530) is formed to extend from one end of the body part (520) and is inserted into and received in the first hole (612), and a second end (534) formed to extend from the first end (532) to one side and is formed to have an outer diameter corresponding to the inner diameter of the second hole (614) and is received inside the second hole (614), characterized in that it is a mounting structure for a point fit for a drilling machine. Claim 5 In claim 4, the holder (200, 300) has a configuration comprising an inner holder (200) to which the point fit (500) and the point fit holder (600) or the tooth (100) are detachably coupled in one direction, and an outer holder (300) to which the inner holder (200) is detachably coupled in one direction; and the inner holder (200) and the outer holder (300) have a configuration in which they are fastened and fixed to each other by means of a fixing pin (400) having elasticity due to their own shape or material, characterized in that the mounting structure of a point fit for a drilling machine.

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