A wear-reducing shock-absorbing drill bit and drill rod

Abstract

The utility model belongs to the technical field of spiral drilling machine, concretely relates to a kind of wear-reducing shock-absorbing drill teeth and drill rod, and wear-reducing shock-absorbing drill teeth includes: welded tooth, tooth seat and shock pad, welded tooth includes tooth handle, and first pin hole is equipped on tooth handle;Tooth seat is equipped with inner cavity for accommodating tooth handle, shock pad includes the outer shock-absorbing surface and inner shock-absorbing surface of V type, inner cavity side wall includes the first matching surface that is in line with outer shock-absorbing surface, tooth handle side wall includes the second matching surface that is in line with inner shock-absorbing surface, and first matching surface and second matching surface form installation gap between, and shock pad is housed in installation gap;Second pin hole is equipped on tooth seat, and first pin hole and second pin hole are equipped with the anti-loosening knurled pin that makes tooth handle and tooth seat relative fixed.The utility model is by shock pad half-enclosing on tooth handle, and welded tooth and tooth seat are blocked, adopt the design that the shock-absorbing surface of V type and matching surface are in line, and welded tooth and tooth seat play shock-absorbing effect in up and down, left and right, front and back multiple directions.

Description

Technical Field

[0001] This utility model relates to the field of auger drilling technology, and in particular to a wear-reducing and vibration-damping drill tooth and drill rod. Background Technology

[0002] In the field of construction machinery, auger drilling rigs are important drilling equipment. Their drill rods are typically used in conjunction with excavators, loaders, or other hydraulic power sources to drive the auger and complete construction tasks such as drilling and pile driving. However, in actual operation, the drill teeth at the bottom of the drill rod are subject to significant impact and vibration, making them prone to detachment and breakage. This not only poses safety hazards but can also cause construction failures, affecting operational efficiency and reliability. Furthermore, the drill teeth must cope with complex and varied geological conditions during drilling and pile driving. When encountering hard rock formations or other geological environments, the drill teeth and blades at the bottom of the drill rod are in direct contact with the rock for extended periods. Continuous friction and impact lead to severe wear on the drill teeth and other critical components such as the base plate. While existing technologies can mitigate these problems by optimizing the drill tooth material or adjusting drilling parameters, they do not fundamentally resolve the contradiction between the risk of drill tooth detachment and breakage and the rapid wear of critical components in complex geological conditions, nor can they effectively reduce cutting resistance to improve drilling efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the technical problem that key components such as drill teeth and tooth seats are easily worn, detached or broken during construction due to severe wear in the prior art, this utility model provides a wear-reducing and vibration-resistant drill tooth and drill rod to reduce the vibration and wear of the drill teeth and tooth seats at the bottom of the drill rod.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a wear-reducing and vibration-damping drill tooth, comprising: a welded tooth, a tooth base, and a vibration-damping pad.

[0005] The welding tooth includes a tooth shank, and the tooth shank is provided with a first pin hole;

[0006] The toothed seat has an inner cavity for accommodating the toothed handle. The shock-absorbing pad includes a V-shaped outer shock-absorbing surface and an inner shock-absorbing surface. The side wall of the inner cavity includes a first mating surface that fits against the outer shock-absorbing surface. The side wall of the toothed handle includes a second mating surface that fits against the inner shock-absorbing surface. Both the first mating surface and the second mating surface are V-shaped. The toothed handle is inserted into the inner cavity, and an installation gap is formed between the first mating surface and the second mating surface. The shock-absorbing pad is received within the installation gap.

[0007] The toothed seat is provided with a second pin hole that communicates with the inner cavity, and anti-loosening knurled pins are sleeved in the first pin hole and the second pin hole to fix the toothed shank relative to the toothed seat.

[0008] Furthermore, the shock-absorbing pad is configured in a U-shape, and the area of ​​the cross-section of the shock-absorbing pad along the vertical direction is slightly larger than the area of ​​the cross-section of the installation gap along the vertical direction.

[0009] Furthermore, the tooth holder includes a tooth holder body and a welding part. One end of the tooth holder body is recessed inward to form the inner cavity. The upper and lower outer edges of one end of the tooth holder body are respectively provided with outwardly protruding protrusions, and the two protrusions gradually approach each other in a direction away from the tooth holder body. The welding part is connected to the other end of the tooth holder body. The welding tooth also includes a connecting part connected to the tooth shank. A first contact plane is formed at the connection between the connecting part and the tooth shank. A second contact plane is formed at one end of the tooth holder body that fits against the first contact plane. The two protrusions are respectively located outside the upper and lower end faces of the connecting part.

[0010] Furthermore, an inclined welding surface is formed at the connection between the tooth base body and the welding part.

[0011] Furthermore, the welding part is provided with an inclined step surface, which is inclined upward in the front-back direction away from the tooth seat body, and inclined upward from left to right in the left-right direction.

[0012] Furthermore, the front end of the connecting part is provided with a tooth tip, the tooth tip is inclined from top to bottom, the tooth tip forms an angle with the lower plane of the connecting part, and the thickness of the tooth tip is greater than the thickness of the connecting part.

[0013] Furthermore, the tooth tip includes a plurality of alloy blocks arranged in sequence, with the alloy blocks located at the left and right ends inclined outward.

[0014] A drill rod includes a drill rod connecting sleeve, a welded steel pipe, a fixing plate, a center drill fixing head, a center drill, and a plurality of wear-reducing and vibration-damping drill teeth as described in any one of the above, connected in sequence. The drill rod connecting sleeve is adapted to be connected to engineering machinery to drive the drill rod to work. Blades are wound around the welded steel pipe. The plurality of wear-reducing and vibration-damping drill teeth are installed on the fixing plate. A central hole is opened in the middle of the fixing plate. The center drill fixing head is installed on the welded steel pipe through the central hole.

[0015] Furthermore, the fixing plate has a narrow and long structure, and multiple mounting slots are spirally opened on the periphery of the fixing plate. Each mounting slot is welded with a wear-reducing and vibration-damping drill tooth. Each mounting slot has a beveled surface, which is adapted to completely fit with the inclined welding surface of the welding part. The inclined step surface fits with the upper surface of the fixing plate. The wear-reducing and vibration-damping drill teeth provided on the multiple mounting slots are simultaneously arranged in a clockwise or counterclockwise direction.

[0016] Furthermore, the central drill is arranged in a spiral structure, and an alloy block is welded to the tip of the central drill.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model sets up a shock-absorbing pad that partially surrounds the tooth shank, blocking the welded tooth from the tooth seat. The V-shaped shock-absorbing surface fits the mating surface, providing shock protection for the welded tooth and tooth seat in multiple directions, including up and down, left and right, and front and back. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of a wear-reducing and vibration-damping drill tooth according to the present invention.

[0021] Figure 2 for Figure 1 Exploded view.

[0022] Figure 3 This is a top view of the tooth tip of this utility model.

[0023] Figure 4 This is a schematic diagram of the drill rod structure of this utility model.

[0024] Figure 5 for Figure 4 A bottom view.

[0025] Figure 6 This is a schematic diagram of the installation of the fixing plate of this utility model.

[0026] Figure 7 This is a schematic diagram of the structure of the fixing plate of this utility model.

[0027] In the diagram: 1. Drill tooth; 101. Welded tooth; 102. Tooth seat; 103. Anti-vibration pad; 104. Tooth shank; 105. First pin hole; 106. Inner cavity; 107. Outer anti-vibration surface; 108. Inner anti-vibration surface; 109. First mating surface; 110. Second mating surface; 111. Second pin hole; 112. Anti-loosening knurled pin; 113. Tooth seat body; 114. Welded part; 115. Protrusion; 116. First contact plane; 117. Second contact plane; 118. Inclined welding surface; 119. Inclined step surface; 120. Tooth tip; 121. Alloy block; 122. Connecting part; 2. Drill rod connecting sleeve; 3. Welded steel pipe; 4. Fixing plate; 401. Center hole; 402. Mounting slot; 403. Beveled surface; 5. Center drill fixing head; 6. Center drill; 7. Blade. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figures 1 to 3The image shows a preferred embodiment of the present invention. This embodiment provides a wear-reducing and vibration-damping drill tooth 1, comprising: a welded tooth 101, a tooth base 102, and a vibration-damping pad 103. The welded tooth 101 includes a tooth shank 104, on which a first pin hole 105 is provided. The tooth base 102 has an inner cavity 106 for accommodating the tooth shank 104. The vibration-damping pad 103 includes a V-shaped outer vibration-damping surface 107 and an inner vibration-damping surface 108. The sidewall of the inner cavity 106 includes a first mating surface 109 that fits against the outer vibration-damping surface 107. The sidewall of the tooth shank 104... The wall includes a second mating surface 110 that fits against the inner anti-vibration surface 108. Both the first mating surface 109 and the second mating surface 110 are V-shaped. The tooth shank 104 is inserted into the inner cavity 106, and an installation gap is formed between the first mating surface 109 and the second mating surface 110. The anti-vibration pad 103 is housed within the installation gap. The tooth seat 102 is provided with a second pin hole 111 that communicates with the inner cavity 106. Knurled anti-loosening pins 112 are fitted in the first pin hole 105 and the second pin hole 111 to fix the tooth shank 104 and the tooth seat 102 relative to each other. By setting the anti-vibration pad 103 to partially surround the tooth shank 104, the welded tooth 101 and the tooth seat 102 are isolated. The V-shaped design of the anti-vibration surface fitting against the mating surface provides anti-vibration protection for the welded tooth 101 and the tooth seat 102 in multiple directions, including up and down, left and right, and front and back.

[0032] In a preferred embodiment, the shock absorber 103 is configured in a U-shape, with the cross-sectional area of ​​the shock absorber 103 along the vertical direction slightly larger than the cross-sectional area of ​​the installation gap along the vertical direction. Therefore, during installation of the welding teeth 101 and tooth base 102, the shock absorber 103 is compressed, filling the installation gap and providing a dustproof seal. Specifically, the shock absorber 103 is made of rubber, which provides better shock absorption and wear reduction.

[0033] In a preferred embodiment, the tooth holder 102 includes a tooth holder body 113 and a welding portion 114. One end of the tooth holder body 113 is recessed inward to form an inner cavity 106. The upper and lower outer edges of one end of the tooth holder body 113 are respectively provided with outwardly protruding protrusions 115. The welding portion 114 is connected to the other end of the tooth holder body 113. The welding tooth 101 also includes a connecting portion 122 connected to the tooth shank 104. A first contact plane 116 is formed at the connection between the connecting portion 122 and the tooth shank 104. One end of the tooth holder body 113 is formed with a second contact plane 117 that fits against the first contact plane 116. The two protrusions 115 are respectively located outside the upper and lower end faces of the connecting portion 122. Thus, after the tooth shank 104 is inserted into the inner cavity 106, the protrusions 115 increase the contact area with the welding tooth 101, ensuring contact strength, and cooperate with the first contact plane 116 and the second contact plane 117 to resist the vertical or horizontal load on the welding tooth 101 during drilling. The two protrusions 115 gradually approach each other in a direction away from the tooth base body 113, so that the thickness of the front end structure of the welded tooth 101 as a whole is less than the thickness of the rear end structure. This design can reduce drilling resistance and facilitate the transfer of sand and gravel.

[0034] In a preferred embodiment, an inclined welding surface 118 is formed at the connection between the tooth base body 113 and the welding part 114.

[0035] In a preferred embodiment, the front end of the connecting part 122 is provided with a tooth tip 120, which is inclined from top to bottom and forms an angle with the lower plane of the connecting part 122. During operation, it can prevent sand from entering the inner cavity 106 of the tooth seat 102.

[0036] In a preferred embodiment, the tooth tip 120 includes a plurality of alloy blocks 121 arranged in sequence, with the alloy blocks 121 located at the left and right ends inclined outward. The thickness of the tooth tip 120 is greater than the thickness of the connecting portion 122, which can reduce the wear on the connecting portion 122.

[0037] like Figures 4 to 7 The diagram shows a preferred embodiment of the present invention. This embodiment includes a drill rod comprising a drill rod connecting sleeve 2, a welded steel pipe 3, a fixing plate 4, a center drill fixing head 5, a center drill 6, and multiple anti-friction and anti-vibration drill teeth 1 as described in any of the above embodiments, connected in sequence. The drill rod connecting sleeve 2 is suitable for connection to engineering machinery to drive the drill rod. Blades 7 are wound around the welded steel pipe 3. Multiple anti-friction and anti-vibration drill teeth 1 are mounted on the fixing plate 4. A center hole 401 is opened in the center of the fixing plate 4, and the center drill fixing head 5 is mounted on the welded steel pipe 3 through the center hole 401.

[0038] In a preferred embodiment, the fixing plate 4 has a narrow and long structure. The narrow and long design reduces the downward drilling resistance of the drill rod. The fixing plate 4 has multiple mounting slots 402 spirally opened on its periphery. Each mounting slot 402 is welded with a wear-reducing and vibration-damping drill tooth 1, so that the wear-reducing and vibration-damping drill teeth 1 can be distributed around the circumference of the central drill 6, ensuring the cutting movement of the drill teeth 1 when the drill rod is rotating. Each mounting slot 402 has a beveled surface 403, which is suitable for complete contact with the inclined welding surface 118 of the welding part 114. The inclined step surface 119 is in contact with the upper end surface of the fixing plate 4. The wear-reducing and vibration-damping drill teeth 1 provided on the multiple mounting slots 402 are simultaneously arranged in a clockwise or counterclockwise direction.

[0039] For details, see Figure 5 As shown, the drill tooth 1 is welded and fixed by the oblique cutting surface 403 and the inclined welding surface 118, ensuring that the diameter of the cutting circle formed by the outermost alloy block 121 on the outermost drill tooth 1 during the rotary cutting process is greater than or equal to or slightly larger than the actual diameter of the drilled hole, and the diameter of the blade 7 is smaller than the diameter of the drilled hole, thereby ensuring that the hole wall of the drilled hole is cut smoothly and flat, while reducing the wear of the blade 7.

[0040] In a preferred embodiment, the welding part 114 is provided with an inclined step surface 119. The inclined step surface 119 is inclined upward in the front-back direction away from the tooth base body 113, and inclined upward from left to right in the left-right direction. The inclined step surface 119 is designed to facilitate welding positioning. The inclined design of the inclined step surface 119 in the front-back direction is to ensure that the tooth tip 120 and the rear end of the welding tooth 101 generate a back angle during drilling, reducing resistance and facilitating drilling into the soil. It is also inclined in the left-right direction. Multiple anti-friction and anti-vibration drill teeth 1 are installed on the fixing plate 4. The anti-friction and anti-vibration drill teeth 1 are inclined inward as a whole. When the drill rod rotates and cuts, the anti-friction and anti-vibration drill teeth 1 can cut along the circumference. The rear end of the tooth base 102 will not be interfered with or worn. The drill teeth 1 turn the soil and cut, causing the sand and soil to move inward and upward, reducing offline movement and facilitating the transfer of sand, gravel, etc.

[0041] In a preferred embodiment, the center drill 6 is arranged in a spiral structure, which can reduce resistance and facilitate the transport of sand and gravel to the upper end of the drill rod. An alloy block 121 is welded to the tip of the center drill 6 to reduce the wear of the center drill 6 body. The center drill 6 protrudes a certain distance from the wear-reducing and vibration-damping drill teeth 1, which facilitates positioning in the early stage of drilling. The diameter of the center drill fixing head 5 is smaller than the diameter of the center drill 6, which can reduce the wear of the center drill fixing head 5 and the upper fixing plate 4.

[0042] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A wear-reducing and vibration-damping drill tooth, characterized in that, include: The welding tooth (101), tooth base (102) and shock absorber (103) are provided. The welding tooth (101) includes a tooth shank (104) and a first pin hole (105) is provided on the tooth shank (104). The toothed seat (102) is provided with an inner cavity (106) for accommodating the toothed shank (104). The shock-absorbing pad (103) includes a V-shaped outer shock-absorbing surface (107) and an inner shock-absorbing surface (108). The side wall of the inner cavity (106) includes a first mating surface (109) that fits against the outer shock-absorbing surface (107). The side wall of the toothed shank (104) includes a second mating surface (110) that fits against the inner shock-absorbing surface (108). Both the first mating surface (109) and the second mating surface (110) are V-shaped. The toothed shank (104) is inserted into the inner cavity (106), and an installation gap is formed between the first mating surface (109) and the second mating surface (110). The shock-absorbing pad (103) is accommodated in the installation gap. The toothed seat (102) is provided with a second pin hole (111) communicating with the inner cavity (106). The first pin hole (105) and the second pin hole (111) are fitted with anti-loosening knurled pins (112) to fix the toothed shank (104) relative to the toothed seat (102).

2. The wear-reducing and vibration-damping drill bit as described in claim 1, characterized in that, The shock absorber (103) is U-shaped in shape, and the area of ​​the cross section of the shock absorber (103) along the vertical direction is greater than the area of ​​the cross section of the installation gap along the vertical direction.

3. The wear-reducing and vibration-damping drill tooth as described in claim 1, characterized in that, The tooth holder (102) includes a tooth holder body (113) and a welding part (114). One end of the tooth holder body (113) is recessed inward to form the inner cavity (106). The upper and lower outer edges of one end of the tooth holder body (113) are respectively provided with outwardly protruding protrusions (115), and the two protrusions (115) gradually approach each other in a direction away from the tooth holder body (113). The welding part (114) is connected to the other end of the tooth holder body (113). The welding tooth (101) also includes a connecting part (122) connected to the tooth shank (104). A first contact plane (116) is formed at the connection between the connecting part (122) and the tooth shank (104). A second contact plane (117) is formed at one end of the tooth holder body (113) that fits against the first contact plane (116). The two protrusions (115) are respectively located outside the upper and lower end faces of the connecting part (122).

4. A wear-reducing and vibration-damping drill tooth as described in claim 3, characterized in that, An inclined welding surface (118) is formed at the connection between the tooth base body (113) and the welding part (114).

5. A wear-reducing and vibration-damping drill tooth as described in claim 3, characterized in that, The welding part (114) is provided with an inclined step surface (119). The inclined step surface (119) is inclined upward in the front-back direction away from the tooth seat body (113) and inclined upward from left to right in the left-right direction.

6. A wear-reducing and vibration-damping drill tooth as described in claim 3, characterized in that, The front end of the connecting part (122) is provided with a tooth tip (120), the tooth tip (120) is inclined from top to bottom, the tooth tip (120) forms an angle with the lower plane of the connecting part (122), and the thickness of the tooth tip (120) is greater than the thickness of the connecting part (122).

7. A wear-reducing and vibration-damping drill tooth as described in claim 6, characterized in that, The tooth tip (120) includes a plurality of alloy blocks (121) arranged in sequence, with the alloy blocks (121) located at the left and right ends inclined outward.

8. A drill pipe, characterized in that, The assembly includes a drill rod connecting sleeve (2), a welded steel pipe (3), a fixing plate (4), a center drill fixing head (5), a center drill (6), and a plurality of wear-reducing and vibration-damping drill teeth as described in any one of claims 1 to 7, wherein the drill rod connecting sleeve (2) is adapted to be connected to engineering machinery to drive the drill rod to work, the welded steel pipe (3) is provided with blades (7), the plurality of wear-reducing and vibration-damping drill teeth (1) are installed on the fixing plate (4), the fixing plate (4) has a center hole (401) in the middle, and the center drill fixing head (5) is installed on the welded steel pipe (3) through the center hole (401).

9. A drill pipe as described in claim 8, characterized in that, The fixing plate (4) has a narrow and long structure. The fixing plate (4) has a plurality of mounting slots (402) spirally opened on its periphery. Each mounting slot (402) is welded with a wear-reducing and vibration-damping drill tooth (1). Each mounting slot (402) has a beveled surface (403). The beveled surface (403) is adapted to be completely fitted with the inclined welding surface (118) of the welding part (114). The inclined step surface (119) is fitted with the upper end surface of the fixing plate (4). The wear-reducing and vibration-damping drill teeth (1) provided on the plurality of mounting slots (402) are simultaneously arranged in a clockwise or counterclockwise direction.

10. A drill pipe as described in claim 8, characterized in that, The center drill (6) is arranged in a spiral structure, and an alloy block (121) is welded to the tip of the center drill (6).

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