Pneumatic telescopic drilling equipment capable of drilling in small space

Abstract

The utility model discloses starting telescopic drilling equipment capable of drilling in a small space, which comprises a shell, a drill chuck arranged at the end part of the shell and a pneumatic motor arranged in the shell, a movable column in sliding fit with the shell is arranged in the shell, an opening for the movable column to extend out is arranged at the tail end of the shell, and the pneumatic motor is arranged in the shell. A sealing piece is arranged between the movable column and the inner wall of the shell, a cavity communicated with the shell is formed in the end, facing the shell, of the movable column, supporting assemblies are arranged on the two sides of the other end of the movable column respectively, and an air tap connector and an exhaust valve are further arranged on the movable column. According to the technical scheme, constructors can drill holes in the space-limited environment.

Description

Technical Field

[0001] The utility model relates to a pneumatic telescopic drilling device which can drill holes in a small space. Background Art

[0002] Bridge bearings are important structural components that connect the superstructure and substructure of a bridge. They need to be maintained and replaced after a certain period of use. During installation, bridge bearings are not restricted by space, so construction workers can use an air drill to drill holes vertically downward for the insertion of bearing anchor bolts. However, when replacing bearings, since there is little space left between the superstructure and substructure of the bridge after installation, conventional air drills cannot drill holes in the substructure, resulting in construction workers having to re-weld the new bearings and the old anchor bolts to fix them. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pneumatic telescopic drilling device that can drill holes in a small space, so as to solve the problem that it is inconvenient for construction workers to drill holes in a small environment.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic telescopic drilling device capable of drilling holes in a small space, comprising a shell, a drill chuck installed at the end of the shell, and an air motor installed inside the shell, wherein a movable column slidably matched with the shell is provided inside the shell, an opening for the movable column to extend out is provided at the end of the shell, a sealing member is provided between the movable column and the inner wall of the shell, a cavity connected to the shell is provided at one end of the movable column facing the shell, and support assemblies are provided on both sides of the other end, and an air nozzle interface and an exhaust valve are also provided on the movable column.

[0005] As a further improvement of the utility model, the inner wall of the shell is arranged with a plurality of slide grooves along its circumference, and the slide grooves extend along the sliding direction of the movable column. A raised sliding block is provided at the position of the slide groove on the outer diameter surface of the movable column, and the sealing member is sleeved on the outer diameter surface of the movable column.

[0006] As a further improvement of the utility model, an annular groove is provided on the movable column, the sealing member is sleeved in the annular groove, and protrusions are respectively provided at positions of the sealing member corresponding to the sliding grooves.

[0007] As a further improvement of the utility model, the support assembly includes a pillar and a screw rod sleeved on the pillar, a connecting block is provided on the screw rod, the connecting block is sleeved on the pillar and cooperates with the pillar to prevent rotation, a step is provided on the pillar to limit the connecting block, a nut is provided on the side of the pillar away from the step to lock the connecting block, and threaded sleeves are provided on both sides of the screw rod.

[0008] As a further improvement of the utility model, an abutment plate for contact support is provided on the sleeve.

[0009] Beneficial effects of the utility model: the technical solution enables construction workers to drill holes in an environment with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0011] Figure 2 It is a cross-sectional schematic diagram of the housing and the movable column of the embodiment of the utility model.

[0012] Figure numbers: 1. Shell; 2. Drill chuck; 3. Movable column; 4. Opening; 5. Seal; 6. Cavity; 7. Air nozzle interface; 8. Exhaust valve; 9. Slide groove; 10. Slider; 11. Annular groove; 12. Protrusion; 13. Pillar; 14. Screw; 15. Connecting block; 16. Sleeve; 17. Abutment plate. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0014] Reference Figure 1-2As shown, a pneumatic telescopic drilling device for drilling holes in a small space comprises a shell 1, a drill chuck 2 installed at the end of the shell 1, and an air motor installed inside the shell 1. The shell 1 is provided with an air inlet and an exhaust port at the position corresponding to the air motor. A movable column 3 is provided in the shell 1 to slide with the movable column 3. An opening 4 is provided at the end of the shell 1 for the movable column 3 to extend out. A sealing member 5 is provided between the movable column 3 and the inner wall of the shell 1. A cavity 6 connected to the shell 1 is provided at one end of the movable column 3 facing the shell 1, and support assemblies are provided on both sides of the other end. The support assemblies are provided to support the whole. The upper structure and the lower structure can be abutted and the drilling direction can be kept vertical. An air nozzle interface 7 and an exhaust valve 8 are also provided on the movable column 3. The air nozzle interface 7 and the exhaust valve 8 are connected to the cavity 6. The cavity 6 is provided to communicate with the space inside the shell 1. The shell 1 is connected to the movable column 3 through the shell 1. The seal 5 between the columns 3 is sealed and connected to the air nozzle interface 7 through an air pipe, so that compressed air applies pressure to the inside of the shell 1, thereby driving the shell 1 and the movable column 3 to move relative to each other. The inner wall of the shell 1 is arranged with a plurality of slide grooves 9 along its circumference, and the slide groove 9 extends along the sliding direction of the movable column 3. The outer diameter surface of the movable column 3 is provided with a slider 10 with a protrusion 12 at a position corresponding to the slide groove 9. The cooperation between the slider 10 and the slide groove 9 guides the displacement between the shell 1 and the movable column 3. The movable column 3 is provided with an annular groove 11, and the seal 5 is sleeved in the annular groove 11, and the seal 5 is respectively provided with protrusions 12 at the position corresponding to the slide groove 9. Damping is provided between the seal 5 and the shell 1, and damping is also provided between the protrusion 12 and the slide groove 9. This arrangement improves the sealing between the shell 1 and the movable column 3, and prevents the shell 1 and the movable column 3 from sliding relative to each other due to their own weight.

[0015] The support assembly includes a pillar 13 and a screw rod 14 sleeved on the pillar 13, a connecting block 15 is provided on the screw rod 14, the connecting block 15 is sleeved on the pillar 13 and cooperates with the pillar 13 to prevent rotation, so that the support assembly can remain parallel to the shell 1, a step is provided on the pillar 13 to limit the connecting block 15, a nut is provided on the side of the pillar 13 away from the step to lock the connecting block 15, and threaded sleeves 16 are respectively provided on both sides of the screw rod 14. The sleeve 16 is adjusted to cope with environments at different heights, and an abutment plate 17 for contacting the support is provided on the sleeve 16. The abutment plate 17 is provided to increase the contact surface between the support assembly and the upper structure and the lower structure to ensure that the drilled hole is in a vertical state with the mounting surface.

[0016] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A pneumatic telescopic drilling device capable of drilling holes in a small space, comprising a housing, a drill chuck mounted at the end of the housing, and a pneumatic motor mounted inside the housing, characterized in that: A movable column is provided in the shell and is slidably matched with the shell. An opening is provided at the end of the shell for the movable column to extend out. A sealing member is provided between the movable column and the inner wall of the shell. A cavity connected to the shell is provided at one end of the movable column facing the shell, and support components are provided on both sides of the other end. An air nozzle interface and an exhaust valve are also provided on the movable column.

2. The pneumatic telescopic drilling equipment capable of drilling holes in a small space according to claim 1, characterized in that: The inner wall of the housing is provided with a plurality of slide grooves along its circumference, and the slide grooves extend along the sliding direction of the movable column. The outer diameter surface of the movable column is provided with a raised sliding block at a position corresponding to the slide groove, and the sealing member is sleeved on the outer diameter surface of the movable column.

3. The pneumatic telescopic drilling equipment capable of drilling holes in a small space according to claim 2, characterized in that: The movable column is provided with an annular groove, the sealing member is sleeved in the annular groove, and the sealing member is provided with protrusions at positions corresponding to the sliding grooves.

4. The pneumatic telescopic drilling equipment capable of drilling holes in a small space according to claim 1, characterized in that: The support assembly includes a pillar and a screw rod sleeved on the pillar, a connecting block is provided on the screw rod, the connecting block is sleeved on the pillar and cooperates with the pillar to prevent rotation, a step is provided on the pillar to limit the connecting block, a nut is provided on the side of the pillar away from the step to lock the connecting block, and threaded sleeves are provided on both sides of the screw rod.

5. The pneumatic telescopic drilling device capable of drilling holes in a small space according to claim 4, characterized in that: The sleeve is provided with an abutment disk for contact support.

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