Rock drill guide bushing changing tool

Abstract

The utility model provides a rock drill guide sleeve replacement tool, its technical scheme is: including compression assembly, pressure head and rotating handle, the inside of compression assembly is equipped with transmission mechanism, is used for the rotation of rotating handle is changed into the linear motion of pressure head, the power input end of transmission mechanism is fixedly connected with one end of rotating handle, and the power output end of transmission mechanism is detachably connected with pressure head, and the just below of pressure head is equipped with work table, is used for the rock drill part of receiving. Advantageous effects are: (1) flexible even force, thoroughly eliminates the damage of part, (2) labour -saving transmission design, reduces operation intensity and promotes efficiency greatly.

Description

Technical Field

[0001] This utility model belongs to the technical field of rock drill maintenance equipment, and in particular relates to a rock drill guide sleeve replacement tool. Background Technology

[0002] Currently, most rock drill equipment, both domestically and internationally, requires the replacement of easily worn guide sleeves. Because the guide sleeve and rock drill head have an interference fit, disassembly is difficult. Therefore, the replacement process requires tools such as hammers and chisels. Existing replacement tools are either too forceful or require hand-tightening of the screws. While these tools may help with removal, they are laborious to install and lack adequate protective measures, causing damage to the guide sleeve and rock drill head, making it impossible to avoid wear and tear from such damage. Summary of the Invention

[0003] To address the problems of high wear and low manual efficiency in the disassembly and assembly of guide sleeves in the prior art, this utility model provides a rock drill guide sleeve replacement tool. The technical solution includes a clamping assembly, a pressure head, and a rotating handle. The clamping assembly has a transmission mechanism inside, which converts the rotation of the rotating handle into the linear motion of the pressure head. The power input end of the transmission mechanism is fixedly connected to one end of the rotating handle, and the power output end of the transmission mechanism is detachably connected to the pressure head. A worktable is provided directly below the pressure head to support rock drill parts.

[0004] In a preferred embodiment, the transmission mechanism includes a worm, a worm wheel, a rotating shaft, a gear, and a rack. The worm and the worm wheel are meshed and connected for transmission. The center of the worm wheel is interference-fitted with one end of the rotating shaft, and the other end of the rotating shaft is interference-fitted with the center of the gear. The tooth surface of the gear meshes with the rack. The end face of the worm is fixedly connected to one end of the rotating handle, and the lower end face of the rack is detachably connected to the pressure head.

[0005] In a preferred embodiment, the bottom of the workbench is fixedly connected to the base by at least three support columns.

[0006] In a preferred embodiment, the bottom of the clamping assembly is fixedly connected to the top of the column, and the bottom of the column is connected to the base via a bearing, enabling the clamping assembly and the column to rotate in place.

[0007] In a preferred embodiment, the middle part of the workbench has a through-hole structure to accommodate guide sleeves of different sizes, making it convenient to replace guide sleeves of different sizes for the rock drill.

[0008] In a preferred embodiment, the rotary handle is driven manually or by an electric motor.

[0009] In a preferred embodiment, the side of the workbench closest to the column is detachably connected to the clamp. The clamp restricts the rotational freedom of the pressing assembly by clamping the column, preventing it from rotating accidentally when the guide sleeve is disassembled or assembled.

[0010] In a preferred embodiment, the surface of the worktable and the contact area between the pressure head and the guide sleeve are covered with a rubber protective sleeve to prevent damage to the rock drill and the guide sleeve.

[0011] The beneficial effects of this utility model are: (1) The rotational motion of the rotating handle is precisely converted into the linear motion of the pressure head through the transmission chain of "worm-worm wheel-rotating shaft-gear-rack". The deceleration characteristics of the worm wheel and worm can amplify the output torque. The meshing transmission of the gear and rack ensures that the pressure head applies force smoothly without impact, avoiding damage to parts caused by the instantaneous impact force of traditional violent operation. The surface of the worktable and the contact surface between the pressure head and the guide sleeve are covered with rubber protective sleeves. The elastic buffering characteristics of rubber can absorb the slight vibration during disassembly and assembly, while avoiding scratches and dents caused by direct contact of metal parts, thus completely solving the pain point of high disassembly and assembly wear. (2) The meshing transmission of worm and worm wheel has the effect of speed reduction and torque increase. Combined with the linear output of gear rack, only a small handle driving force is needed to drive the pressure head to generate sufficient disassembly and assembly pressure. Compared with the manual tightening screw, the operation intensity is greatly reduced. The rotating handle supports manual drive or motor drive. If the motor drive is used, it can further liberate manpower, further reduce the disassembly and assembly time of the guide sleeve, and significantly improve maintenance efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a front view of the present invention.

[0014] Figure 3 This is the left view of the present invention.

[0015] Figure 4 This is a schematic diagram of the overall structure of this utility model from another perspective.

[0016] Figure 5 This is a schematic diagram of the transmission mechanism within the clamping assembly of this utility model.

[0017] In the diagram: 1. Clamping assembly; 2. Base; 3. Column; 4. Worktable; 5. Pressure head; 6. Rotary handle; 7. Support column; 8. Fixture; 9. Worm gear; 10. Worm wheel; 11. Rotary shaft; 12. Gear; 13. Rack. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Example like Figures 1-4 The rock drill guide sleeve replacement tool shown includes a clamping assembly 1, a pressure head 5, and a rotating handle 6. The clamping assembly 1 has a transmission mechanism inside, which is used to convert the rotation of the rotating handle 6 into the linear motion of the pressure head 5. The power input end of the transmission mechanism is welded to one end of the rotating handle 6, and the power output end of the transmission mechanism is connected to the flange of the pressure head 5. A worktable 4 is provided directly below the pressure head 5 to support rock drill parts.

[0020] like Figure 5 The transmission mechanism shown includes a worm 9, a worm wheel 10, a rotating shaft 11, a gear 12, and a rack 13. The worm 9 and the worm wheel 10 are meshed and connected for transmission. The center of the worm wheel 10 is interference-fitted with one end of the rotating shaft 11, and the other end of the rotating shaft 11 is interference-fitted with the center of the gear 12. The tooth surface of the gear 12 meshes with the rack 13. The end face of the worm 9 is welded to one end of the rotating handle 6, and the lower end face of the rack 13 is connected to the flange of the pressure head 5.

[0021] The pressure head 5 (such as a round or square contact head) can be replaced according to the shape and size of the guide sleeve to further expand the tool's compatibility range and meet the maintenance needs of different models of rock drills.

[0022] Furthermore, the bottom of the workbench 4 is connected to the base 2 by four support columns 7 through threads, forming a stable support structure that can evenly bear the reaction force when the pressure head applies force, thus preventing the workbench 4 from tilting or shaking.

[0023] Furthermore, the bottom of the clamping assembly 1 is connected to the top flange of the column 3, and the bottom of the column 3 is connected to the base 2 through a bearing, so that the clamping assembly 1 and the column 3 can rotate in place.

[0024] Furthermore, the middle part of the workbench 4 has a through hole structure, which can accommodate guide sleeves of different sizes to pass through, making it convenient to replace guide sleeves of different sizes for the rock drill. It can accommodate guide sleeves of different sizes to pass through, and can complete the disassembly and assembly of guide sleeves of various specifications without changing the workbench, avoiding the tediousness of frequently changing tools.

[0025] Furthermore, the rotating handle 6 is driven manually or by a motor.

[0026] Furthermore, the side of the workbench 4 closest to the column 3 is connected to the clamp 8 by bolts. The bolt holes on the clamp 8 correspond to the bolt holes on the side wall of the workbench 4 and are then fixed by bolts. The clamp 8 clamps the column 3, restricting the rotational freedom of the clamping assembly 1 and preventing it from rotating accidentally when the guide sleeve is disassembled or assembled.

[0027] Furthermore, the surface of the workbench 4 and the contact area between the pressure head 5 and the guide sleeve are covered with rubber protective sleeves to prevent damage to the rock drill and the guide sleeve.

[0028] The working principle of the transmission mechanism is as follows: The rotating handle 6 receives manual or electric rotational driving force, which drives the welded worm 9 to rotate synchronously. The worm 9 meshes with the worm wheel 10 for transmission. The transmission ratio characteristic of the worm wheel and worm can reduce speed and amplify the small torque of the worm into the large torque of the worm wheel. The worm wheel 10 drives the rotating shaft 11 to rotate through an interference fit. The other end of the rotating shaft then drives the gear 12 to rotate synchronously through an interference fit. The gear 12 meshes with the rack 13, converting the rotational motion of the gear into the up-and-down linear motion of the rack. Finally, it drives the pressure head 5 connected to the rack flange to achieve a smooth pressure or lifting action, completing the disassembly and assembly of the guide sleeve.

[0029] Using the above tools, the disassembly process of the guide sleeve is as follows: Position the clamping assembly 1 away from directly above the worktable 4, place the rock drill head whose guide sleeve needs to be removed on the worktable 4, then rotate the clamping assembly 1 above the rock drill head, so that the guide sleeve faces directly below the pressure head 5, and the center of the guide sleeve is aligned with the through hole in the middle of the worktable 4. Then, lock the clamp 8 to prevent the clamping assembly 1 from rotating freely. Manually or via a motor, rotate the rotating handle 6 to drive the rack 13 to move the pressure head 5 downwards until the rubber protective sleeve at the bottom of the pressure head 5 is in contact with the top of the rock drill guide sleeve, avoiding hard contact. Continue rotating the rotating handle 6, and the torque amplified by the transmission mechanism drives the pressure head 5 to apply downward pressure at a uniform speed. The interference fit between the guide sleeve and the drill head gradually loosens under uniform pressure. The pressure head 5 continues to press down, pushing the guide sleeve out of the drill head. The pushed-out guide sleeve falls through the through hole in the middle of the worktable 4. Rotate the rotating handle 6 in the opposite direction to drive the pressure head upwards to reset and disengage from the rock drill head.

[0030] Installation process: Position the rock drill head (with the guide sleeve to be installed) off-center from the top of the worktable 4. Then, rotate the clamping assembly 1 above the rock drill head so that the guide sleeve is directly below the pressure head 5, and the center of the guide sleeve is aligned with the through hole in the middle of the worktable 4. Then, lock the clamp 8 to prevent the clamping assembly 1 from rotating freely. Place the new guide sleeve (or the repaired old guide sleeve) on the mounting hole of the rock drill head, ensuring alignment with the installation reference. Fit the rubber protective sleeve of the pressure head onto the top of the guide sleeve. Rotate the rotating handle 6 to slowly move the pressure head 5 downwards. After gently contacting the top of the guide sleeve, continue applying force. The smooth output of the transmission mechanism ensures that the guide sleeve is pressed vertically into the mounting hole, and the rubber protective sleeve buffers the pressure to prevent deformation of the guide sleeve. Continue until the guide sleeve is fully pressed into the interference fit of the drill head. Rotate the rotating handle 6 in the opposite direction to reset the pressure head 5 upwards, removing it from the newly installed guide sleeve.

Claims

1. A rock drill guide sleeve replacement tool, characterized in that, It includes a clamping assembly (1), a pressure head (5) and a rotating handle (6). The clamping assembly (1) has a transmission mechanism inside, which is used to convert the rotation of the rotating handle (6) into the linear motion of the pressure head (5). The power input end of the transmission mechanism is fixedly connected to one end of the rotating handle (6), and the power output end of the transmission mechanism is detachably connected to the pressure head (5). A worktable (4) is provided directly below the pressure head (5) to support rock drill parts.

2. The rock drill guide sleeve replacement tool according to claim 1, characterized in that, The transmission mechanism includes a worm (9), a worm wheel (10), a rotating shaft (11), a gear (12), and a rack (13). The worm (9) is meshed with the worm wheel (10) for transmission. The center of the worm wheel (10) is interference-fitted with one end of the rotating shaft (11), and the other end of the rotating shaft (11) is interference-fitted with the center of the gear (12). The tooth surface of the gear (12) meshes with the rack (13). The end face of the worm (9) is fixedly connected to one end of the rotating handle (6), and the lower end face of the rack (13) is detachably connected to the pressure head (5).

3. The rock drill guide sleeve replacement tool according to claim 1, characterized in that, The bottom of the workbench (4) is fixedly connected to the base (2) by at least three support columns (7).

4. The rock drill guide sleeve replacement tool according to claim 1, characterized in that, The bottom of the clamping assembly (1) is fixedly connected to the top of the column (3), and the bottom of the column (3) is connected to the base (2) through a bearing, so that the clamping assembly (1) and the column (3) can rotate in place.

5. The rock drill guide sleeve replacement tool according to claim 1, characterized in that, The middle part of the workbench (4) has a through hole structure, which can accommodate guide sleeves of different sizes, making it convenient to replace guide sleeves of different sizes for the rock drill.

6. The rock drill guide sleeve replacement tool according to claim 1, characterized in that, The rotary handle (6) is driven by manual or motor.

7. The rock drill guide sleeve replacement tool according to claim 1, characterized in that, The workbench (4) is detachably connected to the clamp (8) on the side near the column (3). The clamp (8) restricts the rotational freedom of the clamping assembly (1) by clamping the column (3) to prevent it from rotating accidentally when the guide sleeve is disassembled or assembled.

8. The rock drill guide sleeve replacement tool according to claim 1, characterized in that, The surface of the workbench (4) and the contact area between the pressure head (5) and the guide sleeve are covered with rubber protective sleeves to avoid damage to the rock drill and the guide sleeve.

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