A portable engineering drill

Abstract

This invention relates to an engineering drilling rig, specifically a portable engineering drilling rig. The rig includes a base frame, a mast, a lifting device, a lifting cylinder, a power head, and a diagonal brace. The base frame consists of an outer base, an inner base, and support legs. The outer base includes two parallel base plates, and the mast is fixedly mounted on the base plates. The lifting device is sleeved on the mast and includes a sliding sleeve, an upper fixed seat, and a lower fixed seat. An upper cylinder seat is fixedly mounted on the lower end face of the upper fixed seat, and a lower cylinder seat is fixedly mounted on the upper end face of the lower fixed seat. A power head clamping seat is provided between the upper and lower cylinder seats. The lifting cylinder is fixedly mounted on the upper and lower cylinder seats. The power head is fixedly mounted on the power head clamping seat. One end of the diagonal brace is connected to the base plate, and the other end is connected to the mast. This invention features a simple structure, reasonable design, small size, easy portability and assembly / disassembly, and long service life.

Description

Technical Field

[0001] This invention relates to the field of engineering drilling rig technology, specifically a portable engineering drilling rig. Background Technology

[0002] Foundation pile holes are widely used in the foundation construction of highways, bridges, and high-rise buildings. Due to the different and complex geological strata and structures of the construction site, the selection of drilling rigs for pile hole construction varies. Except in coastal areas where pile ramming machines are widely used due to deep silt layers, rotary drilling rigs are generally chosen as the construction equipment. In recent years, due to the continuous development and progress of construction equipment, as well as the increasing market requirements for drilling rig construction, including the impact of safety and environmental factors, the market share of traditional mechanical engineering drilling rigs has been shrinking, while new, highly automated engineering drilling rigs are gradually being recognized by the market.

[0003] As is well known, engineering drilling rigs are relatively large, especially mast-type engineering drilling rigs. The mast height needs to be designed according to the drilling depth, which places high demands on the base frame of the engineering drilling rig. This makes them inconvenient to carry when drilling in complex mountainous terrain. Currently, portable engineering drilling rigs are also available on the market. For example, Chinese Patent Publication No. CN218092931U discloses a portable support engineering drilling rig, including: a work box; a base located below the work box; a lifting mechanism located between the work box and the base; four tapered rods respectively fixedly connected to the front and back of the base; the lifting mechanism includes: a bidirectional threaded rod located between the work box and the base. This portable support engineering drilling rig, by rotating the bidirectional threaded rod, causes the hinge rod one and hinge rod two to move relative to each other, thereby stacking the work box and the base together for easy storage and carrying. It is also small in size, simple in structure, and easy to move and transport. By rotating the screw, the sliding block moves within the through slot, causing the connecting rod to lift the support plate and rotate around the hinge point, thereby adjusting the tilt angle of the drilling rig body to adapt to drilling operations in undulating and inclined terrain conditions. This type of support drilling rig is portable and capable of drilling in undulating and inclined terrain. However, it is unsuitable for complex environments requiring large boreholes; a larger mast drilling rig is necessary. Mast drilling rigs are bulky, inconvenient to carry and disassemble, and the prolonged friction of the power head leads to a short lifespan. Therefore, we need to improve the structure of mast drilling rigs to make them easier to carry and install. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a portable engineering drilling rig, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a portable engineering drilling rig, comprising a base frame, a mast, a lifting device, a lifting cylinder, a power head, and diagonal braces. The base frame consists of an outer base, an inner base, and support legs. The outer base includes two parallel base plates, one end of which is provided with a connecting sleeper, and the other end with a sliding plate. Two sliding plates are provided, each fixedly connected to one of the two base plates, forming a slide rail between them. The inner base is slidably mounted on the slide rail. Four support legs are provided, each connected to a base plate via a connector, and the four support legs can be opened or closed along the connector. The mast is fixedly installed... On the base plate; the lifting device is sleeved on the mast, and the lifting device includes a sliding sleeve, an upper fixed seat, and a lower fixed seat. The sliding sleeve is a hollow cavity structure with openings at both the upper and lower ends, and the sliding sleeve is sleeved on the outside of the mast. The upper fixed seat and the lower fixed seat are respectively fixedly installed at the openings at the upper and lower ends of the sliding sleeve. An upper cylinder seat is fixedly installed on the lower end face of the upper fixed seat, and a lower cylinder seat is fixedly installed on the upper end face of the lower fixed seat. A power head clamping seat is provided between the upper cylinder seat and the lower cylinder seat. The lifting cylinder is fixedly installed on the upper cylinder seat and the lower cylinder seat. The power head is fixedly installed on the power head clamping seat. There are two diagonal braces, one end of which is connected to the two base plates respectively, and the other end is connected to the mast.

[0006] Preferably, the inner base includes two parallel telescopic columns and a first link, a second link, a third link, a fourth link, a fifth link, and a sixth link arranged sequentially from left to right on the telescopic columns. Both ends of the first link and the second link are slidably connected to the slide rail, and the length of the first link and the second link is greater than the length of the third link, the fourth link, the fifth link, and the sixth link. Fixing members are provided on the fourth link and the fifth link, and a winch is fixedly installed on the fixing members.

[0007] Preferably, the support leg includes a support link and a first mounting seat and a second mounting seat disposed at both ends of the support link and fixedly connected to the support link. The first mounting seat is equipped with a foot pad, and the second mounting seat is connected to a connector.

[0008] Preferably, the connector includes an L-shaped base and a connecting shaft. The L-shaped base is fixedly mounted on the base plate, and a shaft hole is provided on the L-shaped base. The connecting shaft passes through the shaft hole from bottom to top and is rotatably connected to the first mounting base.

[0009] Preferably, the sliding sleeve is formed by four hollow nylon plates.

[0010] Preferably, the upper cylinder seat and the lower cylinder seat have the same structure, both of which include a cylinder seat body. The cylinder seat body is wrench-shaped, and one end of the cylinder seat body is provided with a cylinder connection notch, and the other end is provided with a power head connection notch. A clamping block is fixedly connected to the cylinder connection notch, and a fixing buckle for fixing the lifting cylinder is formed between the clamping block and the cylinder connection notch.

[0011] Preferably, a connecting rib is provided between the power head clamping seat and the upper cylinder seat, and a fixing hole for fixing the power head is provided on the connecting rib. The power head clamping seat is also provided with a semi-circular clamping opening for fixing the power head. An adjusting column is provided on one side of the connecting rib between the power head clamping seat and the upper cylinder seat, and an adjusting handle is connected to the adjusting column.

[0012] Preferably, the diagonal brace consists of an inner diagonal rod, an outer diagonal rod, and a clamping device. The outer diagonal rod is a hollow cavity structure with an opening at one end. The inner diagonal rod is disposed within this cavity and can slide along the length of the outer diagonal rod within its cavity. A locking port is provided on the outer diagonal rod near the end of the inner diagonal rod, and the clamping device is disposed at this locking port to lock the inner and outer diagonal rods.

[0013] Preferably, the clamping device includes a locking block, a sleeve, and a clamping body, wherein the locking block is located at the locking port, the sleeve is sleeved on the outside of the locking block, and the clamping body is detachably installed on the sleeve.

[0014] Preferably, the clamp body is composed of an upper clamp, a lower clamp, an upper washer, a lower washer, a locking block, clamp screws, and locking screws. The upper washer and the lower washer are respectively disposed on the inner side of the upper clamp and the lower clamp. The locking block is disposed on the upper end face of the upper clamp. There are two locking screws. Both locking screws pass through the lower clamp and the upper clamp from bottom to top and are connected to the locking block. The clamp screw passes through the locking block and the upper clamp from top to bottom and is connected to the upper washer.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. This invention provides a portable engineering drilling rig, which consists of a base frame, mast, lifting device, lifting cylinder, power head, and diagonal brace. The overall structure is simple and reasonably designed. The base frame consists of an outer base, an inner base, and support legs. The base frame is small in size and easy to move. The outer base of the base frame includes two parallel base plates, and a sliding plate is provided at one end of the two base plates. A slide rail is formed between the sliding plate and the two base plates. The inner base is slidably mounted on the slide rail. In this way, the counterweight balance can be adjusted by extending and retracting the inner base without moving the base frame, which has good safety. The support legs can be opened or closed along the connecting parts, which is convenient for carrying and storage. The support legs include a support rod and a first mounting seat and a second mounting seat provided at both ends of the support rod and fixedly connected to the support rod. The first mounting seat and the second mounting seat are both cylindrical, which facilitates the movement of the support legs in any direction and is convenient for installation and use.

[0017] 2. This invention provides a lifting device mounted on the mast. The lifting device includes a sliding sleeve, an upper fixed seat, and a lower fixed seat. The sliding sleeve is a hollow cavity structure with openings at both ends, and it is fitted onto the outside of the mast. The sliding sleeve is composed of four hollow nylon plates, which reduces its weight and thus reduces friction between the sliding sleeve and the mast. An adjusting column is installed between the power head clamp and the upper cylinder seat, located on one side of the connecting rib. An adjusting handle is connected to this column, allowing the user to adjust the center of gravity of the sliding sleeve. This prevents friction between the sliding sleeve and the mast during prolonged movement, effectively extending the service life of the lifting device.

[0018] 3. The diagonal brace in this invention consists of an inner diagonal rod, an outer diagonal rod, and a clamping device. The inner diagonal rod is housed within the cavity of the outer diagonal rod. A locking port is provided on the outer diagonal rod near the end of the inner diagonal rod. The clamping device is located at the locking port and locks the inner and outer diagonal rods together. The clamping device secures the inner and outer diagonal rods, facilitating disassembly and transportation. Furthermore, the diagonal brace connection offers good stability, a long service life, and low maintenance costs. The length of the diagonal brace is also adjustable to meet user needs. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the present invention;

[0020] Figure 2 This is a structural diagram of the base frame of the present invention;

[0021] Figure 3 This is a structural diagram of the outer base of the present invention;

[0022] Figure 4 This is a structural diagram of the inner base of the present invention;

[0023] Figure 5 This is a structural diagram of the support leg of the present invention;

[0024] Figure 6 This is an exploded view of the connector of the present invention;

[0025] Figure 7 This is a structural diagram of the lifting device of the present invention;

[0026] Figure 8 This is a structural diagram of the upper cylinder block seat of the present invention;

[0027] Figure 9 This is an exploded view of the diagonal brace of the present invention;

[0028] Figure 10 This is an exploded view of the clamping device of the present invention;

[0029] Figure 11 This is an exploded view of the main body of the clamp of the present invention.

[0030] The reference numerals and names in the figure are as follows:

[0031] 1. Base frame; 11. Outer base; 111. Base plate; 112. Connecting sleeper; 113. Slide plate; 114. Slide rail; 12. Inner base; 121. Telescopic column; 122. First connecting rod; 123. Second connecting rod; 124. Third connecting rod; 125. Fourth connecting rod; 126. Fifth connecting rod; 127. Sixth connecting rod; 128. Fixing component; 129. Winch; 13. Support leg; 131. Support connecting rod; 132. First mounting seat; 133. Second mounting seat; 134. Foot pad; 14. Connecting component; 141. L-shaped seat; 142. Connecting shaft; 143. Shaft hole; 2. Mast; 3. Lifting device; 31. Sliding sleeve; 32. Upper fixed seat; 33. Lower fixed seat; 34. Upper cylinder seat; 341. Cylinder seat body; 342. Cylinder body connection notch; 343. Power head connection notch; 344. Clamping block; 345. Fixing buckle; 35. Lower cylinder body seat; 36. Power head clamping seat; 37. Connecting rib; 38. Fixing hole; 39. Semi-circular clamping opening; 310. Adjusting column; 311. Adjusting handle; 4. Lifting cylinder; 5. Power head; 6. Diagonal brace; 61. Inner diagonal rod; 62. Outer diagonal rod; 63. Clamping device; 631. Locking block; 632. Sleeve; 633. Clamping body; 6331. Upper clamping; 6332. Lower clamping; 6333. Upper gasket; 6334. Lower gasket; 6335. Locking block; 6336. Clamping screw; 6337. Locking screw; 64. Locking opening. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present invention 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 the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0035] Please see Figure 1 The present invention provides an embodiment of a portable engineering drilling rig, which consists of a base frame 1, a mast 2, a lifting device 3, a lifting cylinder 4, a power head 5, and diagonal braces 6. The overall structure is simple and reasonably designed. The mast 2 is fixedly installed on the base frame 1, the lifting device 3 is sleeved on the mast 2, the lifting cylinder 4 and the power head 5 are respectively installed on the lifting device 3, and two diagonal braces 6 are provided. One end of the two diagonal braces 6 is connected to the base frame 1, and the other end is connected to the mast 2.

[0036] Below, we will provide a detailed explanation of the various structures of each engineering drilling rig, referring to the drawings:

[0037] Please see Figure 2The base frame 1 in the figure consists of an outer base 11, an inner base 12, and support legs 13. The inner base 12 is slidably mounted on the outer base 11. There are four support legs 13, which are connected to the outer base 11 via connectors 14. The four support legs 13 can be opened or closed along the connectors 14 for easy storage and carrying.

[0038] Please see Figure 3 The outer base 11 includes two parallel base plates 111. One end of each base plate 111 is provided with a connecting sleeper 112, and the other end is provided with a sliding plate 113. There are two sliding plates 113, which are fixedly connected to the two base plates 111 respectively, and a slide rail 114 is formed between them.

[0039] Please see Figure 1 and Figure 4 The inner base 12 in the figure is slidably mounted on the slide rail 114. The inner base 12 includes two parallel telescopic columns 121 and a first connecting rod 122, a second connecting rod 123, a third connecting rod 124, a fourth connecting rod 125, a fifth connecting rod 126 and a sixth connecting rod 127 arranged sequentially from left to right on the telescopic columns 121. Both ends of the first connecting rod 122 and the second connecting rod 123 are slidably connected to the slide rail 114, and the length of the first connecting rod 122 and the second connecting rod 123 is greater than the length of the third connecting rod 124, the fourth connecting rod 125, the fifth connecting rod 126 and the sixth connecting rod 127. Fixing members 128 are provided on the fourth connecting rod 125 and the fifth connecting rod 126, and a winch 129 is fixedly installed on the fixing members 128.

[0040] Please see Figure 5 The support leg 13 in the figure is fixedly installed on the base plate 111 mentioned above. It includes a support rod 131 and a first mounting seat 132 and a second mounting seat 133 disposed at both ends of the support rod 131 and fixedly connected to the support rod 131. A foot pad 134 is installed on the first mounting seat 132, and the second mounting seat 133 is connected to the connecting member 14 mentioned above.

[0041] Please see Figure 6 The connector 14 in the figure includes an L-shaped base 141 and a connecting shaft 142. The L-shaped base 141 is fixedly installed on the base plate 111, and the L-shaped base 141 has a shaft hole 143. The connecting shaft 142 passes through the shaft hole 143 from bottom to top and is rotatably connected to the first mounting base 132. The connecting shaft 142 on the connector 14 enables the support leg 13 to move in any direction.

[0042] Please see Figure 7The lifting device 3 shown in the figure includes a sliding sleeve 31, an upper fixed seat 32, and a lower fixed seat 33. The sliding sleeve 31 is a hollow cavity structure with openings at both the upper and lower ends. The sliding sleeve 31 is fitted onto the outside of the mast 2. In this embodiment, the sliding sleeve 31 is formed by four hollow nylon plates, which can reduce the weight of the sliding sleeve 31 and reduce the friction between the sliding sleeve 31 and the mast 2, thus extending the service life of the lifting device 3. The upper fixed seat 32 and the lower fixed seat 33 are respectively fixedly installed at the upper and lower openings of the sliding sleeve 31. An upper cylinder seat is fixedly installed on the lower end face of the upper fixed seat 32. 34. A lower cylinder block seat 35 is fixedly installed on the upper end face of the lower fixed seat 33. A power head clamping seat 36 is provided between the upper cylinder block seat 34 and the lower cylinder block seat 35. A connecting rib position 37 is provided between the power head clamping seat 36 and the upper cylinder block seat 34. A fixing hole 38 for fixing the power head is opened on the connecting rib position 37. A semi-circular clamping opening 39 for fixing the power head 5 is also provided on the power head clamping seat 36. An adjusting column 310 is provided on one side of the connecting rib position 37 between the power head clamping seat 36 and the upper cylinder block seat 34. An adjusting handle 311 is connected to the adjusting column 310.

[0043] Please see Figure 8 The upper cylinder seat 34 in the figure has the same structure as the lower cylinder seat 35 mentioned above. Both of them include a cylinder seat body 341. The cylinder seat body 341 is wrench-shaped, and one end of the cylinder seat body 341 is provided with a cylinder connection notch 342, and the other end is provided with a power head connection notch 343. A clamping block 344 is fixedly connected to the cylinder connection notch 342. A fixing buckle 345 for fixing the lifting cylinder 4 is formed between the clamping block 344 and the cylinder connection notch 342.

[0044] Please see Figure 9 The diagonal brace 6 in the figure consists of an inner diagonal rod 61, an outer diagonal rod 62, and a clamping device 63. The outer diagonal rod 62 is a hollow cavity structure with an opening at one end. The inner diagonal rod 61 is disposed in the cavity and can slide along the length of the outer diagonal rod 62 within the cavity. A locking port 64 is provided on the outer diagonal rod 62 near the end of the inner diagonal rod 61. The clamping device 63 is disposed at the locking port 64 and locks the inner diagonal rod 61 and the outer diagonal rod 62.

[0045] Please see Figure 10 The clamping device 63 in the figure includes a locking block 631, a sleeve 632 and a clamping body 633. The locking block 631 is located at the locking port 64, the sleeve 632 is sleeved on the outside of the locking block 631, and the clamping body 633 is detachably installed on the sleeve 632.

[0046] Please see Figure 11The clamp body 633 in the figure consists of an upper clamp 6331, a lower clamp 6332, an upper washer 6333, a lower washer 6334, a locking block 6335, a clamp screw 6336, and a locking screw 6337. The upper washer 6333 and the lower washer 6334 are respectively located inside the upper clamp 6331 and the lower clamp 6332. The locking block 6335 is located on the upper end face of the upper clamp 6331. There are two locking screws 6337. Both locking screws 6337 pass through the lower clamp 6332 and the upper clamp 6331 from bottom to top and then connect to the locking block 6335. The clamp screw 6336 passes through the locking block 6335 and the upper clamp 6331 from top to bottom and then contacts and connects to the upper washer 6333.

[0047] Please refer to it again. Figures 1 to 11 In this embodiment, the mast 2 is fixedly installed on the base plate 111, the lifting cylinder 4 is fixedly installed on the upper cylinder seat 34 and the lower cylinder seat 35, and the power head 5 is fixedly installed on the power head clamping seat 36. During operation, the four support legs 13 can rotate at any angle along the connecting shaft 142 of the connector 14 to support the engineering drilling rig. The base frame 1 adopts a telescopic structure for easy carrying and transportation. At the same time, the diagonal brace 6 is composed of a separate inner diagonal bar 61 and an outer diagonal bar 62, also for the purpose of easy carrying. When the output end of the lifting cylinder 4 extends, it can drive the power head 5 to move along the length direction of the mast 2 to achieve the purpose of drilling.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A portable engineering drill comprising: The system includes a base frame (1), a mast (2), a lifting device (3), a lifting cylinder (4), a power head (5), and diagonal braces (6). The base frame (1) is composed of an outer base (11), an inner base (12), and support legs (13). The outer base (11) includes two parallel base plates (111). One end of each base plate (111) is provided with a connecting sleeper (112), and the other end is provided with a sliding plate (113). There are two sliding plates (113). The two sliding plates (113) are fixedly connected to the two base plates (111) respectively, and a slide rail (114) is formed between them. The inner base (12) is slidably mounted on the slide rail (114). 4) The support legs (13) are provided in four parts. The four support legs (13) are respectively connected to the base plate (111) through the connector (14), and the four support legs (13) can be opened or closed along the connector (14); the mast (2) is fixedly installed on the base plate (111); the lifting device (3) is sleeved on the mast (2), and the lifting device (3) includes a sliding sleeve (31), an upper fixed seat (32) and a lower fixed seat (33). The sliding sleeve (31) is a hollow cavity structure with openings at both ends. The sliding sleeve (31) is sleeved on the outside of the mast (2). The upper fixed seat (32) and the lower fixed seat (33) are respectively fixedly installed on the upper and lower ends of the sliding sleeve (31). At the end opening, an upper cylinder seat (34) is fixedly installed on the lower end face of the upper fixed seat (32), and a lower cylinder seat (35) is fixedly installed on the upper end face of the lower fixed seat (33). A power head clamping seat (36) is provided between the upper cylinder seat (34) and the lower cylinder seat (35). The lifting cylinder (4) is fixedly installed on the upper cylinder seat (34) and the lower cylinder seat (35). The power head (5) is fixedly installed on the power head clamping seat (36). There are two diagonal braces (6), one end of which is connected to two base plates (111) respectively, and the other end is connected to the mast (2). The inner base (12) includes two parallel telescopic columns (121) and a column arranged from left to right. The first link (122), the second link (123), the third link (124), the fourth link (125), the fifth link (126), and the sixth link (127) are respectively set on the telescopic column (121). Both ends of the first link (122) and the second link (123) are slidably connected to the slide rail (114), and the length of the first link (122) and the second link (123) is greater than the length of the third link (124), the fourth link (125), the fifth link (126), and the sixth link (127). Fixing members (128) are provided on the fourth link (125) and the fifth link (126), and a winch (129) is fixedly installed on the fixing member (128).

2. A portable engineering drill as claimed in claim 1, characterised in that: The support leg (13) includes a support link (131) and a first mounting seat (132) and a second mounting seat (133) disposed at both ends of the support link (131) and fixedly connected to the support link (131). A foot pad (134) is installed on the first mounting seat (132), and the second mounting seat (133) is connected to the connector (14).

3. A portable engineering drill as claimed in claim 1, characterized in that: The connector (14) includes an L-shaped base (141) and a connecting shaft (142). The L-shaped base (141) is fixedly installed on the base plate (111), and a shaft hole (143) is provided on the L-shaped base (141). The connecting shaft (142) passes through the shaft hole (143) from bottom to top and is rotatably connected to the first mounting base (132).

4. A portable engineering drill as claimed in claim 1, characterized in that: The sliding sleeve (31) is composed of four hollow nylon plates.

5. A portable engineering drill as claimed in claim 1, characterized in that: The upper cylinder seat (34) and the lower cylinder seat (35) have the same structure, both of which include a cylinder seat body (341). The cylinder seat body (341) is wrench-shaped, and one end of the cylinder seat body (341) is provided with a cylinder connection notch (342), and the other end is provided with a power head connection notch (343). A clamping block (344) is fixedly connected to the cylinder connection notch (342), and a fixing buckle (345) for fixing the lifting cylinder (4) is formed between the clamping block (344) and the cylinder connection notch (342).

6. A portable engineering drill according to claim 1, characterised in that: A connecting rib (37) is provided between the power head clamping seat (36) and the upper cylinder seat (34). A fixing hole (38) for fixing the power head is provided on the connecting rib (37). A semi-circular clamping opening (39) for fixing the power head (5) is also provided on the power head clamping seat (36). An adjusting column (310) is provided between the power head clamping seat (36) and the upper cylinder seat (34) on one side of the connecting rib (37). An adjusting handle (311) is connected to the adjusting column (310).

7. A portable engineering drill according to claim 1, characterised in that: The diagonal brace (6) consists of an inner diagonal rod (61), an outer diagonal rod (62), and a clamping device (63). The outer diagonal rod (62) is a hollow cavity structure with an opening at one end. The inner diagonal rod (61) is located in the cavity and can slide along the length of the outer diagonal rod (62) within the cavity. A locking port (64) is provided on the outer diagonal rod (62) near the inner diagonal rod (61). The clamping device (63) is located at the locking port (64) and locks the inner diagonal rod (61) and the outer diagonal rod (62).

8. A portable engineering drill according to claim 7, characterised in that: The clamping device (63) includes a locking block (631), a sleeve (632) and a clamping body (633), wherein the locking block (631) is located at the locking port (64), the sleeve (632) is sleeved on the outside of the locking block (631), and the clamping body (633) is detachably installed on the sleeve (632).

9. A portable engineering drill as claimed in claim 8, characterised in that: The clamp body (633) is composed of an upper clamp (6331), a lower clamp (6332), an upper washer (6333), a lower washer (6334), a locking block (6335), a clamp screw (6336), and a locking screw (6337). The upper washer (6333) and the lower washer (6334) are respectively located inside the upper clamp (6331) and the lower clamp (6332), and the locking block (6335) is located inside the lower clamp (6332). Two locking screws (6337) are provided on the upper end face of the upper clamp (6331). Both locking screws (6337) pass through the lower clamp (6332) and the upper clamp (6331) from bottom to top and are connected to the locking block (6335). The clamp screw (6336) passes through the locking block (6335) and the upper clamp (6331) from top to bottom and is connected to the upper washer (6333).

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