Movable building roof drilling lifting support

Abstract

The utility model discloses a movable building roof drilling lifting support which comprises a movable seat, a spiral elevator, an ejector rod and an electric drill support, the movable seat comprises a base, trundles are arranged on the lower portion of the base, and vertical plates are arranged on the two sides of the upper portion of the base; a mounting seat is arranged at the lower part of the spiral elevator; a connecting shaft pivoted with the top of the vertical plate is arranged on one side of the mounting seat; the lower end of the ejector rod is connected with a lifting rod of the spiral lifter; the electric drill support is arranged on one side of the ejector rod, and the drilling equipment is fixedly installed on the electric drill support through a plurality of hoops. The spiral elevator is rotatably connected with the vertical plate, so that drilling operation of drilling equipment on an inclined roof is realized, the limitation that a traditional drilling auxiliary device is only suitable for vertical hole operation is broken through, the drilling equipment can perform drilling operation on roofs with various inclination angles, the application range of the device is widened, and the drilling efficiency is improved. And the requirements of different building structures and construction scenes are met.

Description

Technical Field

[0001] This utility model belongs to the field of building decoration and construction, and specifically relates to a mobile building roof drilling lifting support. Background Technology

[0002] In the fields of building decoration and infrastructure construction, drilling into building roof slabs is an extremely common and crucial construction step. Whether it is the installation and fixing of various professional pipelines inside a building (such as water supply and drainage pipes, electrical wiring pipes, etc.), the connection of related components in bridge structures, the installation of air ducts in ventilation systems, or the construction of suspended ceiling projects, precise drilling is required in the roof slab to install various brackets to support and fix the corresponding facilities, ensuring the stable operation and functional realization of the entire building system.

[0003] Traditionally, construction workers rely primarily on mobile scaffolding or A-frame ladders to drill holes in the roof slab. However, both methods have numerous drawbacks. Firstly, workers expend considerable physical strength erecting and moving scaffolding, as well as transporting and adjusting ladders, resulting in extremely high labor intensity and significantly impacting construction efficiency. Secondly, working at heights inherently carries significant safety risks. Workers drilling on scaffolding or ladders are prone to falls due to loss of balance or tool slippage, posing a serious threat to their lives.

[0004] To improve this situation, some auxiliary devices for drilling in roof slabs have emerged in the prior art. For example, CN222270792U discloses an auxiliary support for roof drilling. This device consists of a support rod and a lifting rod connected by a deflection block. By applying force to the deflection block, it deflects along an axis, thereby driving the lifting rod to move up and down. Ultimately, the top connecting block drives the drill bit to contact the roof slab to achieve the drilling operation. To a certain extent, this auxiliary support solves the problem of construction workers working at heights, reducing labor intensity and safety risks.

[0005] However, this existing technology still has significant limitations. In actual construction scenarios, roof shapes and structures vary widely, and not all roof slabs are horizontal. For example, a gable roof on a top floor has a noticeable angle of inclination. The auxiliary supports in the aforementioned existing technology, because their structural design is mainly based on the vertical lifting principle, are only suitable for vertical drilling operations. When facing roofs with angles, they cannot effectively adjust the angle and position of the drill bit to make it perpendicular to the inclined roof surface, thus failing to complete the drilling task smoothly. This greatly limits its applicability and cannot meet the diverse needs of construction. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a mobile building roof drilling lifting support to solve the problem that the application scenarios of existing roof drilling auxiliary tools are limited and cannot drill holes in inclined roofs.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A mobile drilling and lifting support for building roof slabs, comprising:

[0009] A movable base, comprising a base, casters at the bottom of the base for moving the lifting support, and upright plates on both sides of the upper part of the base;

[0010] A screw jack, wherein the lower part of the screw jack is provided with a mounting base, and one side of the mounting base is provided with a connecting shaft that is pivotally connected to the top of the vertical plate;

[0011] The top rod, whose lower end is connected to the lifting rod of the auger, is used to support the electric drill bracket;

[0012] The electric drill bracket is located on one side of the top rod. The drilling equipment is fixedly installed on the electric drill bracket by several clamps. The switch of the drilling equipment is in the normally open state. A control switch is installed on the upright plate or top rod. The drilling equipment is connected to the control switch through a wire.

[0013] Furthermore, an angle adjustment mechanism is provided on one side of the upright plate. The angle adjustment mechanism includes a housing, one side of which is connected to the upright plate via a flange. A hollow bushing is rotatably connected inside the housing. The bushing is fitted over the outside of the connecting shaft and is fixedly connected to the connecting shaft. A worm gear is fixedly connected to the bushing. A worm is meshed on one side of the worm gear. One end of the worm is connected to a handwheel.

[0014] Furthermore, the top rod is provided with a first telescopic rod, which is connected to the top rod through a first locking mechanism.

[0015] Furthermore, the upper end of the first telescopic rod is provided with two sets of limiting plates, and a sleeve is provided between the two sets of limiting plates. The sleeve is rotatably fitted onto the first telescopic rod. A locking bolt is provided on one side of the sleeve for fixing the sleeve to the first telescopic rod. Several connecting rods are provided on one side of the sleeve, and one end of the connecting rod is connected to the electric drill bracket.

[0016] Furthermore, the connecting rod is fitted with a second telescopic rod, one end of which is fixedly connected to the electric drill bracket, and the end of the connecting rod is connected to the second telescopic rod through a second locking mechanism. The second telescopic rod is provided with a first scale line.

[0017] Furthermore, both the first locking mechanism and the second locking mechanism include a fixing sleeve and a locking nut. The fixing sleeve is fixedly installed on the top rod or the connecting rod, with one end of the fixing sleeve extending out of the end of the top rod or the connecting rod. The fixing sleeve has several slits, and one end of the fixing sleeve has a first inclined surface. The locking nut is threadedly connected to the fixing sleeve, and the locking nut has a second inclined surface inside that cooperates with the first inclined surface.

[0018] Furthermore, the positioning mechanism on one side of the electric drill bracket includes a guide sleeve installed on one side of the electric drill bracket, an L-shaped positioning plate slidably connected inside the guide sleeve, and an adjusting bolt threadedly connected to one side of the guide sleeve for locking the positioning plate; the positioning plate is provided with a through hole for accommodating the drill bit, and a second scale line is provided on one side of the positioning plate.

[0019] Furthermore, it also includes a bracing mechanism for supporting the top rod during inclined drilling operations of the lifting support. The bracing mechanism includes a bracing leg, the upper end of which is pivotally connected to a first rod sleeve, which is clearance-fitted with the top rod. The lower end of the bracing leg is threadedly connected to a telescopic leg, and the lower end of the telescopic leg is pivotally connected to a pad.

[0020] Furthermore, a second sleeve is slidably fitted on the lower part of the top rod, and a pull rod is pivotally connected to one side of the second sleeve. The pull rod has several positioning holes. A third sleeve is fitted on the outside of the inclined support leg. A fixing bolt is threaded to one side of the third sleeve, and a positioning pin that mates with the positioning holes is also provided on the third sleeve.

[0021] The beneficial effects of this utility model are:

[0022] (1) This utility model rotatably connects the spiral lift to the vertical plate, enabling the drilling equipment to perform drilling operations on the inclined roof. This breaks through the limitation that traditional drilling auxiliary devices are only suitable for vertical hole operations, allowing the drilling equipment to perform drilling operations on roofs with various inclination angles, thus broadening the applicability of the device and meeting the needs of different building structures and construction scenarios.

[0023] (2) By setting an angle adjustment mechanism, and the angle adjustment mechanism adopts a worm gear structure with self-locking function, the automatic locking of the drilling equipment after angle adjustment is realized, thus ensuring the stability of the lifting support.

[0024] (3) A first telescopic rod is installed on the top rod, which improves the flexibility and applicability of the lifting support.

[0025] (4) A rotatable sleeve is provided at the upper end of the first telescopic rod, and a connecting rod for connecting the electric drill bracket is provided on one side of the sleeve, so that the drilling equipment is arranged off the central axis of the first telescopic rod. This is suitable for drilling operations when there are obstacles such as suspended ceilings on the edge of the top plate, which improves the adaptability and flexibility of the device and broadens its application range.

[0026] (5) A second telescopic rod is fitted on one side of the connecting rod, and a first scale line is set on the second telescopic rod. When the top plate needs to be drilled with multiple holes, the second hole can be quickly positioned by simply rotating the rotating drum and adjusting the telescopic length of the second telescopic rod. This avoids the overall movement and positioning of the lifting support, and enables the lifting support to complete the drilling operation with one positioning. This reduces the number of positioning operations of the lifting support, thereby reducing the relative position error of the multiple holes and ensuring the accuracy of the drilling operation.

[0027] (6) The first locking mechanism and the second locking mechanism realize stepless adjustment of the first telescopic rod and the second telescopic rod. Compared with the traditional hole-type positioning locking mechanism, the locking mechanism of this application has a higher adjustment progress.

[0028] (7) A positioning mechanism is provided on one side of the electric drill bracket. Compared with the traditional positioning structure for calculating the drilling depth by the difference method, the positioning mechanism of this application is more intuitive and simple, reducing the drilling depth deviation caused by calculation errors.

[0029] (8) By setting up a diagonal bracing mechanism and using a tie rod to connect the diagonal bracing leg to the top plate, the diagonal bracing leg, tie rod and top rod form a triangular structure, which enhances the stability of the lifting support. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a mobile building roof drilling lifting support structure according to the present invention.

[0031] Figure 2 This is a schematic diagram of the movable seat structure.

[0032] Figure 3 This is a schematic diagram of the installation of a screw jack.

[0033] Figure 4 This is a schematic diagram of the inside of the angle adjustment mechanism.

[0034] Figure 5 This is a schematic diagram of the push rod structure.

[0035] Figure 6 This is a schematic diagram of the interior of the first locking mechanism.

[0036] Figure 7 This is a schematic diagram of the electric drill support structure.

[0037] Figure 8 This is a schematic diagram of the diagonal bracing mechanism.

[0038] In the diagram, 1. Movable seat; 11. Base; 12. Casters; 13. Upright plate; 2. Screw jack; 21. Mounting base; 22. Connecting shaft; 3. Angle adjustment mechanism; 31. Housing; 32. Worm gear; 33. Bushing; 34. Worm; 35. Handwheel; 4. Top rod; 41. First telescopic rod; 42. First locking mechanism; 421. Fixing screw sleeve; 422. Cutout; 423. First inclined plane; 424. Locking nut; 425. Second inclined plane; 43. Connecting rod; 44. Sleeve; 45. 46. ​​Locking bolt; 46. Second telescopic rod; 461. First scale line; 47. Limiting plate; 48. Second locking mechanism; 5. Electric drill bracket; 51. Clamp; 52. Guide sleeve; 53. Adjusting bolt; 54. Positioning plate; 55. Through hole; 56. Second scale line; 6. Diagonal bracing mechanism; 61. Diagonal bracing leg; 62. Telescopic leg; 63. Pad plate; 64. First rod sleeve; 65. Second rod sleeve; 66. Pull rod; 661. Positioning hole; 662. Positioning pin; 67. Third rod sleeve; 68. Fixing bolt. Detailed Implementation

[0039] The following will be combined with the appendix Figures 1-8 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0041] like Figure 1 As shown, a mobile building roof drilling lifting support includes a mobile base 1, a screw jack 2, a top rod 4, and an electric drill support 5. Figure 2 As shown, the movable base 1 includes a base 11, with casters 12 at the bottom for moving the lifting support, and upright plates 13 on both sides of the upper part of the base 11; Figure 3As shown, the screw jack 2 has a mounting base 21 at its lower part, and a connecting shaft 22 pivotally connected to the top of the vertical plate 13 on one side of the mounting base 21; the lower end of the top rod 4 is connected to the lifting rod of the screw jack 2 to support the electric drill bracket 5; the electric drill bracket 5 is set on one side of the top rod 4, and the drilling equipment (such as electric drill, electric hammer, electric pick, etc.) is fixedly installed on the electric drill bracket 5 by several clamps 51. The switch of the drilling equipment is in the normally open state, and a control switch (not shown in the figure) is installed on the vertical plate 13 or the top rod 4. The drilling equipment is connected to the control switch through a wire.

[0042] When drilling into the roof slab, the moving base 1 is moved to the work area. When the roof slab is horizontal, the top rod 4 is kept vertical. At this time, the drilling equipment can work in a direction perpendicular to the roof slab. The control switch is turned on to start the drilling equipment, and the handle of the screw jack 2 is turned. The lifting rod is used to drive the top rod 4 out, thus realizing the drilling operation of the drilling equipment on the horizontal roof slab.

[0043] For roofs with sloping angles, such as gable roofs, this bracket exhibits unique advantages. By rotating the top rod 4 according to the sloping angle of the roof, the mounting base 21 rotates around the top of the vertical plate 13 until the drill bit is perpendicular to the roof. The control switch is turned on to start the drilling equipment, and the handle of the auger jack 2 is turned to use the lifting rod to push the top rod 4 out. This enables the drilling equipment to perform drilling operations on sloping roofs, breaking through the limitation of traditional drilling auxiliary devices that are only suitable for vertical hole operations. It allows the drilling equipment to perform drilling operations on roofs with various sloping angles, broadening the applicability of the device and meeting the needs of different building structures and construction scenarios.

[0044] like Figure 2 As shown, an angle adjustment mechanism 3 is provided on one side of the upright plate 13, such as... Figure 4 As shown, the angle adjustment mechanism 3 includes a housing 31. One side of the housing 31 is connected to the vertical plate 13 via a flange. A hollow bushing 33 is rotatably connected inside the housing 31. The bushing 33 is sleeved on the outside of the connecting shaft 22 and fixedly connected to the connecting shaft 22. A worm gear 32 is fixedly connected to the bushing 33. A worm 34 is meshed on one side of the worm gear 32. One end of the worm 34 is connected to a handwheel 35.

[0045] Rotating the handwheel 35 causes the worm gear 34 to rotate, which in turn drives the worm wheel 32 to rotate. The worm wheel 32, through the connecting shaft 22, drives the screw jack 2 to rotate, thereby adjusting the angle of the top rod 4 and the drilling equipment. The worm wheel 32 and worm gear 34 have a self-locking function, which automatically locks the drilling equipment after the angle is adjusted, ensuring the stability of the lifting support.

[0046] like Figure 5 As shown, the top rod 4 is provided with a first telescopic rod 41 on its upper part, and the first telescopic rod 41 is connected to the top rod 4 through a first locking mechanism 42.

[0047] In actual construction, the height of the roof slab may vary between different buildings or different areas of the same building. Construction workers only need to operate the first locking mechanism 42 to quickly release and lock the first telescopic rod 41, and adjust the length of the first telescopic rod 41 extending from the top rod 4 according to the actual height of the roof slab, so that the drilling equipment can quickly reach the drilling work surface, improving the flexibility and applicability of the lifting support.

[0048] like Figure 5 As shown, the upper end of the first telescopic rod 41 is provided with two sets of limiting plates 47, and a sleeve 44 is provided between the two sets of limiting plates 47. The sleeve 44 is rotatably sleeved on the first telescopic rod 41. A locking bolt 45 is provided on one side of the sleeve 44 for fixing the sleeve 44 to the first telescopic rod 41. A plurality of connecting rods 43 are provided on one side of the sleeve 44, and one end of the connecting rod 43 is connected to the electric drill bracket 5.

[0049] The movable sleeve 44 causes the drilling equipment to be positioned off-center from the central axis of the first telescopic rod 41. When facing a suspended ceiling, the conventional central axis arrangement may not be able to drill accurately due to space limitations or structural obstructions below the ceiling. However, by rotating the sleeve 44, the position of the drilling equipment can be adjusted, allowing it to bypass obstacles and drill into the ceiling from a suitable angle. This improves the adaptability and flexibility of the device and broadens its application range.

[0050] like Figure 5 , Figure 7 As shown, the connecting rod 43 is fitted with a second telescopic rod 46. One end of the second telescopic rod 46 is fixedly connected to the electric drill bracket 5. The end of the connecting rod 43 is connected to the second telescopic rod 46 through a second locking mechanism 48. The second telescopic rod 46 is provided with a first scale line 461.

[0051] When multiple drilling operations are required on the top slab, after the drilling equipment completes drilling one hole, the construction personnel adjust the length of the second telescopic rod 46 extending from the connecting rod 43 according to the distance between the two holes. Based on the offset angle between the second hole and the first hole, the sleeve 44 is rotated to adjust the position of the drilling equipment, and then it is fixed with the locking bolt 45. This achieves the completion of multiple drilling operations with one positioning of the lifting support, reduces the number of positioning operations of the lifting support, thereby reducing the relative position error of the multiple holes and ensuring the accuracy of the multiple drilling operations.

[0052] like Figure 6As shown, both the first locking mechanism 42 and the second locking mechanism 48 include a fixing sleeve 421 and a locking nut 424. The fixing sleeve 421 is fixedly installed on the top rod 4 or the connecting rod 43. One end of the fixing sleeve 421 extends out of the end of the top rod 4 or the connecting rod 43. The fixing sleeve 421 is provided with several cuts 422, and one end of the fixing sleeve 421 is provided with a first inclined surface 423. The locking nut 424 is threadedly connected to the fixing sleeve 421. The locking nut 424 is provided with a second inclined surface 425 inside, which cooperates with the first inclined surface 423.

[0053] Traditional hole-type positioning and locking mechanisms rely on preset hole positions to position and lock the telescopic rod. The adjustment accuracy of this method is limited by the spacing between the holes, and can only achieve discrete adjustments with fixed intervals, which is difficult to meet the needs of some construction scenarios with extremely high requirements for drilling position accuracy.

[0054] In this application, when the first telescopic rod 41 and the second telescopic rod 46 are inserted into the top rod 4 and the connecting rod 43 respectively, since the locking nut 424 does not tighten the fixing sleeve 421, the first telescopic rod 41 and the second telescopic rod 46 can automatically extend and retract within the top rod 4 and the connecting rod 43. After adjusting the length of the first telescopic rod 41 and the second telescopic rod 46, rotating the locking nut 424 causes the first inclined surface 423 to contact the second inclined surface 425. The second inclined surface 425 then presses against the first inclined surface 423, causing the upper opening of the fixing sleeve 421 to compress inward, thereby locking the first telescopic rod 41 and the second telescopic rod 46, achieving stepless adjustment of the first telescopic rod 41 and the second telescopic rod 46. Construction personnel can lock the telescopic rods at any length position according to actual needs, thereby enabling more precise adjustment of the height and lateral position of the drilling equipment, ensuring that the drilling position is consistent with the design requirements, and greatly improving drilling accuracy.

[0055] like Figure 7 As shown, the positioning mechanism on one side of the electric drill bracket 5 includes a guide sleeve 52 installed on one side of the electric drill bracket 5. An L-shaped positioning plate 54 is slidably connected inside the guide sleeve 52. An adjusting bolt 53 is threadedly connected to one side of the guide sleeve 52 for locking the positioning plate 54. The positioning plate 54 is provided with a through hole 55 for accommodating the drill bit, and a second scale line 56 is provided on one side of the positioning plate 54.

[0056] Before drilling, the upper surface of the positioning plate 54 is adjusted to be flush with the end of the drill bit, and the scale on the positioning plate 54 is observed. Then, according to the required drilling depth, the positioning plate 54 is moved downwards so that the distance moved by the positioning plate 54 is equal to the drilling depth, and the positioning plate 54 is locked. During drilling, when the upper surface of the positioning plate 54 contacts the top plate, the drilling equipment is restricted from further drilling. At this time, the drilling depth is the designed depth, ensuring the accuracy of drilling. Compared with the traditional positioning structure that calculates the drilling depth by the difference method, the positioning mechanism of this application is more intuitive and simple, reducing the drilling depth deviation caused by calculation errors.

[0057] like Figure 1 As shown, it also includes a diagonal bracing mechanism 6, such as Figure 8 As shown, the inclined support mechanism 6 includes an inclined support leg 61, the upper end of which is pivotally connected to a first rod sleeve 64, which is in clearance fit with the top rod 4; the lower end of the inclined support leg 61 is threadedly connected to a telescopic leg 62, and the lower end of the telescopic leg 62 is pivotally connected to a pad 63.

[0058] The diagonal bracing mechanism 6 is used to support the top rod 4 when the lifting support is tilted during drilling operations, thus ensuring the stability of the lifting support.

[0059] like Figure 1 , Figure 8 As shown, a second sleeve 65 is slidably fitted on the lower part of the top rod 4. A pull rod 66 is pivotally connected to one side of the second sleeve 65. The pull rod 66 is provided with several positioning holes 661. A third sleeve 67 is fitted on the outside of the inclined support leg 61. A fixing bolt 68 is threadedly connected to one side of the third sleeve 67. The third sleeve 67 is also provided with a positioning pin 662 that cooperates with the positioning holes 661.

[0060] After the inclined support leg 61 is supported on the ground, the positions of the second rod sleeve 65 and the third rod sleeve 67 are adjusted according to the tilt angle of the inclined support leg 61. According to the distance between the top rod 4 and the inclined support leg 61, the positioning pin 662 is inserted into the positioning hole 661 at the appropriate position, and the third rod sleeve 67 is fixed to the inclined support leg 61 using the fixing bolt 68, so that the inclined support leg 61, the tie rod 66 and the top rod 4 form a triangular structure, which further enhances the stability of the lifting support.

[0061] The above content is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the structure of the utility model, they should all fall within the protection scope of this utility model.

Claims

1. A mobile building roof drilling lifting support, comprising: A movable base, comprising a base, casters at the bottom of the base for moving the lifting support, and upright plates on both sides of the upper part of the base; A screw jack, wherein the lower part of the screw jack is provided with a mounting base, characterized in that a connecting shaft pivotally connected to the top of the vertical plate is provided on one side of the mounting base; The top rod, whose lower end is connected to the lifting rod of the auger, is used to support the electric drill bracket; The electric drill bracket is located on one side of the top rod. The drilling equipment is fixedly installed on the electric drill bracket by several clamps. The switch of the drilling equipment is in the normally open state. A control switch is installed on the upright plate or top rod. The drilling equipment is connected to the control switch through a wire.

2. The mobile building roof drilling lifting support according to claim 1, characterized in that, An angle adjustment mechanism is provided on one side of the upright plate. The angle adjustment mechanism includes a housing. One side of the housing is connected to the upright plate through a flange. A hollow bushing is rotatably connected inside the housing. The bushing is sleeved on the outside of the connecting shaft and fixedly connected to the connecting shaft. A worm gear is fixedly connected to the bushing. A worm is meshed on one side of the worm gear. One end of the worm is connected to a handwheel.

3. The mobile building roof drilling lifting support according to claim 1, characterized in that, The top rod is provided with a first telescopic rod, which is connected to the top rod by a first locking mechanism.

4. A mobile building roof drilling lifting support according to claim 3, characterized in that, The upper end of the first telescopic rod is provided with two sets of limiting plates, and a sleeve is provided between the two sets of limiting plates. The sleeve is rotatably fitted onto the first telescopic rod. A locking bolt is provided on one side of the sleeve for fixing the sleeve to the first telescopic rod. Several connecting rods are provided on one side of the sleeve, and one end of the connecting rod is connected to the electric drill bracket.

5. A mobile building roof drilling lifting support according to claim 4, characterized in that, The connecting rod is fitted with a second telescopic rod, one end of which is fixedly connected to the electric drill bracket. The end of the connecting rod is connected to the second telescopic rod through a second locking mechanism. The second telescopic rod is provided with a first scale line.

6. A mobile building roof drilling lifting support according to claim 5, characterized in that, Both the first locking mechanism and the second locking mechanism include a fixing sleeve and a locking nut. The fixing sleeve is fixedly installed on the top rod or the connecting rod. One end of the fixing sleeve extends out of the end of the top rod or the connecting rod. The fixing sleeve has several cuts and one end of the fixing sleeve has a first inclined surface. The locking nut is threadedly connected to the fixing sleeve. The locking nut has a second inclined surface inside that cooperates with the first inclined surface.

7. A mobile building roof drilling lifting support according to claim 1, characterized in that, The positioning mechanism on one side of the electric drill bracket includes a guide sleeve installed on one side of the electric drill bracket. An L-shaped positioning plate is slidably connected inside the guide sleeve. An adjusting bolt is threadedly connected to one side of the guide sleeve for locking the positioning plate. The positioning plate has a through hole for accommodating the drill bit, and a second scale line is provided on one side of the positioning plate.

8. A mobile building roof drilling lifting support according to any one of claims 1-7, characterized in that, It also includes a bracing mechanism for supporting the top rod during inclined drilling operations of the lifting support. The bracing mechanism includes a bracing leg, the upper end of which is pivotally connected to a first rod sleeve, which is clearance-fitted with the top rod. The lower end of the bracing leg is threadedly connected to a telescopic leg, and the lower end of the telescopic leg is pivotally connected to a pad.

9. A mobile building roof drilling lifting support according to claim 8, characterized in that, The lower part of the top rod is slidably fitted with a second rod sleeve, and a pull rod is pivotally connected to one side of the second rod sleeve. The pull rod is provided with several positioning holes. The outside of the inclined support leg is fitted with a third rod sleeve, and a fixing bolt is threadedly connected to one side of the third rod sleeve. The third rod sleeve is also provided with a positioning pin that cooperates with the positioning holes.

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