A lifting device for painting drill bits

Abstract

The utility model provides a kind of lifting appliance for drill bit paint spraying, comprising: draw bar, the one end of draw bar is provided with lifting hole;Conical shaft, is located in the one end of draw bar away from lifting hole;Expansion sleeve, is sleeved on the outside of conical shaft, the variable outer diameter of expansion sleeve;Adjusting piece, is sleeved on the outside of draw bar, the adjusting piece is used to push expansion sleeve moves along conical shaft, so that expansion sleeve is fixed in the central air passage of drill bit.Compared with prior art, the lifting appliance for drill bit paint spraying provided by the utility model can vertically lift the drill bit for paint spraying, the spraying effect is better, and the quality and reliability of the drill bit surface coating are higher.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a lifting tool for spraying paint on drill bits. Background Technology

[0002] With industrial development and the continuous advancement of various infrastructure projects, down-the-hole hammers and drill bits are widely used in drilling operations in mines, hydropower stations, ports, roads, and tunnels. The hammer utilizes high-pressure compressed air supplied by an air compressor, which enters the front and rear chambers of the hammer to perform work, causing the piston to reciprocate at high speed, impacting the drill bit. Ultimately, the alloy teeth on the drill bit impact and break the rock, achieving the impact drilling operation. The resulting rock debris is then blown out of the hole by the high-pressure gas discharged from the hammer, ultimately completing the hole formation.

[0003] In these harsh engineering environments, drill bits not only endure high-frequency, high-stress mechanical impacts but are also exposed to water, gravel, dust, and corrosive chemical media for extended periods, making their surfaces prone to corrosion and wear. Therefore, painting the outer surface of drill bits during production is a crucial process for extending their service life and improving their corrosion resistance and wear resistance. The coating not only forms a physical barrier, reducing environmental erosion of the substrate, but also facilitates equipment identification and maintenance management during construction.

[0004] Currently, the drill bit is often placed horizontally for spraying, which often results in defects such as uneven coating thickness, sagging, paint accumulation, or incomplete coverage.

[0005] Therefore, there is an urgent need for a drill bit painting hoist that can vertically lift the drill bit for painting, resulting in better painting effect and higher quality and reliability of the coating on the drill bit surface. Utility Model Content

[0006] To address the technical problems in existing technologies, this utility model provides a lifting device for painting drill bits, which can vertically lift the drill bit for painting, resulting in better painting effects and higher quality and reliability of the coating on the drill bit surface.

[0007] A lifting device for spray painting drill bits, comprising: A pull rod, one end of which is provided with a lifting hole; A tapered shaft is located at the end of the tie rod away from the lifting hole; A tensioning sleeve is fitted onto the outside of the tapered shaft, and the outer diameter of the tensioning sleeve is variable. An adjusting element, fitted on the outside of the pull rod, is used to push the tensioning sleeve along the tapered shaft so that the tensioning sleeve is fixed in the central air passage of the drill bit.

[0008] Preferably, the tensioning sleeve comprises: At least two tensioning blocks are arranged sequentially to form an annular cylindrical structure. The inner surface of the annular cylindrical structure is in contact with the outer surface of the conical shaft, and the outer surface of the annular cylindrical structure is used to be in contact with the central airway. A fixing component for securing the tensioning block.

[0009] Preferably, the fixing component includes: An annular groove is provided on the outer circumferential surface of the tensioning sleeve; A sealing ring is installed in the annular groove, and the outer ring of the sealing ring is used to contact the inner wall of the central air passage.

[0010] Preferably, at least two fixing components are provided, and they are spaced apart along the axial direction of the tensioning sleeve.

[0011] Preferably, from the adjusting member to the lifting hole, the outer diameter of the tapered shaft gradually decreases, and the inner diameter of the tensioning sleeve gradually decreases.

[0012] Preferably, the adjusting component is an adjusting nut, and the adjusting nut is threadedly connected to the pull rod.

[0013] Preferably, the tapered shaft and the tie rod are integrally formed; or, The tapered shaft and the pull rod are specifically detachably connected.

[0014] Preferably, the tapered shaft is fitted onto the outside of the pull rod, and the pull rod is provided with a limiting surface for abutting against the end face of the tapered shaft. A locking member is provided at the end of the tapered shaft away from the limiting surface, and the locking member is detachably connected to the pull rod.

[0015] Preferably, the locking element is a locking nut, and the locking element and the pull rod are specifically connected by a thread.

[0016] Preferably, the lifting hole is a circular structure, and the lifting hole and the pull rod are fixedly connected by welding.

[0017] Compared with existing technologies, the drill bit painting lifting tool provided by this utility model includes: a pull rod, a tapered shaft, a tensioning sleeve, and an adjusting component. One end of the pull rod has a lifting hole for use with lifting equipment. The tapered shaft is located at the end of the pull rod away from the lifting hole. The tensioning sleeve is fitted onto the outside of the tapered shaft, and its outer diameter is variable to adapt to the central air passage of the drill bit. The adjusting component is fitted onto the outside of the pull rod and is used to push the tensioning sleeve along the tapered shaft, tightening the tensioning sleeve through the outer diameter of the tapered shaft, thereby fixing the tensioning sleeve within the central air passage of the drill bit. Therefore, compared with existing technologies, the drill bit painting lifting tool provided by this utility model can vertically lift the drill bit for painting, resulting in better painting effects and higher quality and reliability of the drill bit surface coating. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a drill bit painting hanger provided in an embodiment of this utility model (installed in the central air passage of the drill bit); Figure 2 A schematic diagram of a drill bit painting hanger provided in an embodiment of this utility model (not installed in the central air passage of the drill bit); Figure 3 A schematic diagram of a tensioning sleeve provided in an embodiment of this utility model; Figure 4 A top view of a tensioning sleeve provided in an embodiment of this utility model is provided as a structural schematic diagram. Figure 5 A schematic diagram of the structure of the tapered shaft provided in an embodiment of this utility model; Figure 6 This is a schematic diagram of a tie rod provided in an embodiment of the present utility model.

[0020] Reference numerals in the attached diagram: 1. Tie rod; 2. Tapered shaft; 3. Tensioning sleeve; 4. Adjusting component; 5. Drill bit; 6. Locking component; 7. Lifting hole; 11. Limiting surface; 31. Tensioning block; 32. Annular groove; 33. Sealing ring. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0023] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0024] like Figures 1 to 6 As shown, this utility model provides a lifting tool for spraying paint on a drill bit, including: a pull rod 1, one end of which is provided with a lifting hole 7; a tapered shaft 2, located at the end of the pull rod 1 away from the lifting hole 7; a tension sleeve 3, fitted on the outside of the tapered shaft 2, the outer diameter of the tension sleeve 3 being variable; and an adjusting member 4, fitted on the outside of the pull rod 1, the adjusting member 4 being used to push the tension sleeve 3 to move along the tapered shaft 2 so that the tension sleeve 3 is fixed in the central air passage of the drill bit 5.

[0025] In existing technologies, drill bits are often placed horizontally on the ground or table for painting, which can easily lead to uneven painting.

[0026] To solve the aforementioned technical problems, the present invention provides a drill bit painting lifting tool, comprising: a pull rod 1, a tapered shaft 2, a tensioning sleeve 3, and an adjusting component 4. One end of the pull rod 1 has a lifting hole 7 for use with lifting equipment. The tapered shaft 2 is located at the end of the pull rod 1 furthest from the lifting hole 7. The tensioning sleeve 3 is fitted onto the outer side of the tapered shaft 2, and its outer diameter is variable to fit the central air passage of the drill bit 5. The adjusting component 4 is fitted onto the outer side of the pull rod 1 and is used to push the tensioning sleeve 3 along the tapered shaft 2, thereby tightening the tensioning sleeve 3 through the outer diameter of the tapered shaft 2, thus fixing the tensioning sleeve 3 within the central air passage of the drill bit 5. Therefore, compared with the prior art, the drill bit painting lifting tool provided by this embodiment can vertically lift the drill bit for painting, resulting in better painting effects and higher quality and reliability of the drill bit surface coating.

[0027] The central air passage inside the drill bit is built into the drill bit itself and is used for exhaust gas discharge and slag blowing. It does not require additional processing. It is connected to the central air passage through the tensioning sleeve 3, and the tensioning sleeve 3 is tightened through the structure of the tapered shaft 2, which has high reliability.

[0028] In the above structure, as one specific implementation, the tensioning sleeve 3 in this embodiment of the present invention includes: at least two tensioning blocks 31, the tensioning blocks 31 being arranged end to end to form an annular cylindrical structure, the inner surface of the annular cylindrical structure fitting against the outer surface of the conical shaft 2, and the outer surface of the annular cylindrical structure fitting against the central air passage; and a fixing component for fixing the tensioning blocks 31. The tensioning sleeve 3 adopts a splicing structure, which is more convenient for installation.

[0029] like Figures 3 to 4 As shown, the fixing component in this embodiment of the present invention includes an annular groove 32 and a sealing ring 33. The annular groove 32 is disposed on the outer circumferential surface of the tensioning sleeve 3, and the sealing ring 33 is installed in the annular groove 32. On the one hand, at least two tensioning blocks 31 are installed on the outer side of the tapered shaft 2 through the sealing ring 33. On the other hand, the outer ring of the sealing ring 33 is used to contact the inner wall of the central airway. When the tensioning sleeve 3 is tightened, the sealing ring 33 is compressed to increase the frictional force between it and the central airway.

[0030] Furthermore, as one specific implementation, the sealing ring 33 in this embodiment of the present invention is specifically an O-ring.

[0031] Furthermore, in this embodiment of the invention, at least two annular grooves 32 are provided, and the annular grooves 32 are spaced apart along the axial direction of the tensioning sleeve 3. Sealing rings 33 are provided in a one-to-one correspondence with the annular grooves 32.

[0032] In the above structure, as one embodiment, the tensioning sleeve 3 is specifically a cylindrical structure. The inner diameter of the tensioning sleeve 3 is adapted to the outer diameter of the conical shaft 2. From the direction of the adjusting member 4 to the lifting hole 7, the outer diameter of the conical shaft 2 gradually decreases, and the inner diameter of the tensioning sleeve 3 also gradually decreases. The adjusting member pushes the tensioning sleeve 3 to move away from the lifting hole, and the outer diameter of the conical shaft expands the outer diameter of the tensioning sleeve to fix the tensioning sleeve and the central air passage.

[0033] Furthermore, as one embodiment, the outer surface of the tensioning sleeve 3 in this utility model embodiment is provided with a friction layer to increase the frictional force between the tensioning sleeve 3 and the central air passage.

[0034] Furthermore, as one embodiment, the adjusting component 4 in this utility model embodiment is specifically an adjusting nut. The adjusting nut is connected to the pull rod 1 by a thread. By rotating the adjusting nut, the adjusting nut pushes the tensioning sleeve 3 to move along the conical shaft 2 to tighten, making the adjustment method simpler.

[0035] Furthermore, as one embodiment, the tapered shaft 2 and the pull rod 1 in this utility model embodiment are specifically integrally formed, or the tapered shaft 2 and the pull rod 1 are specifically detachably connected.

[0036] Preferably, the tapered shaft 2 and the pull rod 1 are detachably connected. In one specific embodiment, the tapered shaft 2 is fitted onto the outside of the pull rod 1. The pull rod 1 has a limiting surface 11 for contacting the end face of the tapered shaft 2. A locking member 6 is provided at the end of the tapered shaft 2 away from the limiting surface 11. The locking member 6 is detachably connected to the pull rod 1, and the tapered shaft 2 is fixed by the locking member 6 and the limiting surface 11.

[0037] Furthermore, as one embodiment, the locking element 6 in this utility model embodiment is specifically a locking nut, and the locking element 6 is threadedly connected to the pull rod 1. The tapered shaft 2 is fitted onto the outside of the pull rod 1, and the tensioning sleeve 3 is fitted onto the outside of the tapered shaft 2. The tapered shaft 2 is locked by the locking nut, and the tensioning sleeve 3 is inserted into the central air passage. The axial position of the tensioning sleeve 3 is adjusted by adjusting the adjusting nut to make the tensioning sleeve 3 tighten.

[0038] Furthermore, as one embodiment, the lifting hole 7 in this utility model embodiment is specifically a circular structure, and the lifting hole 7 and the pull rod 1 are fixedly connected by welding.

Claims

1. A lifting tool for spray painting drill bits, characterized in that, include: A pull rod (1) is provided with a lifting hole at one end; A tapered shaft (2) is provided at the end of the pull rod (1) away from the lifting hole; A tensioning sleeve (3) is fitted onto the outside of the tapered shaft (2), and the outer diameter of the tensioning sleeve (3) is variable; Adjusting element (4) is fitted on the outside of the pull rod (1). The adjusting element (4) is used to push the tension sleeve (3) to move along the tapered shaft (2) so that the tension sleeve (3) is fixed in the central air passage of the drill bit (5).

2. The lifting tool for spray painting drill bits according to claim 1, characterized in that, The tensioning sleeve includes: At least two tensioning blocks (31) are arranged in sequence to form an annular cylindrical structure. The inner surface of the annular cylindrical structure is in contact with the outer surface of the conical shaft (2). The outer surface of the annular cylindrical structure is used to be in contact with the central airway. A fixing component for securing the tensioning block (31).

3. The lifting tool for spray painting drill bits according to claim 2, characterized in that, The fixing component includes: An annular groove (32) is provided on the outer circumferential surface of the tensioning sleeve (3); A sealing ring (33) is installed in the annular groove (32), and the outer ring of the sealing ring (33) is used to contact the inner wall of the central airway.

4. The lifting tool for spray painting drill bits according to claim 3, characterized in that, At least two fixing components are provided, and they are spaced apart along the axial direction of the tensioning sleeve (3).

5. The lifting tool for spray painting drill bits according to claim 2, characterized in that, From the direction of the adjusting member to the lifting hole, the outer diameter of the tapered shaft (2) gradually decreases, and the inner diameter of the tensioning sleeve (3) gradually decreases.

6. The lifting tool for painting drill bits according to any one of claims 1 to 5, characterized in that, The adjusting component (4) is specifically an adjusting nut, which is connected to the pull rod (1) by a thread.

7. The lifting tool for painting drill bits according to any one of claims 1 to 5, characterized in that, The tapered shaft (2) and the tie rod (1) are specifically integrally formed; or, The tapered shaft (2) and the pull rod (1) are specifically detachably connected.

8. The lifting tool for painting drill bits according to any one of claims 1 to 5, characterized in that, The tapered shaft (2) is fitted on the outside of the pull rod (1). The pull rod (1) is provided with a limiting surface (11) for abutting against the end face of the tapered shaft (2). A locking member (6) is provided at the end of the tapered shaft (2) away from the limiting surface (11). The locking member (6) is detachably connected to the pull rod (1).

9. The lifting tool for spray painting drill bits according to claim 8, characterized in that, The locking component (6) is specifically a locking nut, and the locking component (6) and the pull rod (1) are specifically connected by a thread.

10. The lifting tool for painting drill bits according to any one of claims 1 to 5 and 9, characterized in that, The lifting hole is specifically a circular structure, and the lifting hole and the pull rod are fixedly connected by welding.

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