A derricking mechanism and a rotary drilling rig

Abstract

The application discloses a drilling mast mechanism and a rotary drilling rig, and relates to the technical field of rotary drilling rigs. In the drilling mast mechanism, a second drilling mast body is rotationally connected to a first drilling mast body and is used for overturning relative to the first drilling mast body within a first angle range; a first telescopic driving assembly is used for driving the second drilling mast body to overturn relative to the first drilling mast body; a third drilling mast body is rotationally connected to a second end of the first drilling mast body and is used for overturning relative to the first drilling mast body within a second angle range; a first end of a first connecting rod is rotationally connected to the third drilling mast body, a second end of the first connecting rod is rotationally connected to a first end of a second connecting rod, and a second end of the second connecting rod is rotationally connected to the first drilling mast body; and a second telescopic driving assembly is used for driving the third drilling mast body to overturn relative to the first drilling mast body. The drilling mast mechanism solves the problems of high safety risk, low scene conversion efficiency and high comprehensive cost of traditional manual operation.

Description

Technical Field

[0001] This application relates to the field of rotary drilling rig technology, and particularly to a drilling mast mechanism and a rotary drilling rig. Background Technology

[0002] Rotary drilling rigs, as large-scale drilling equipment widely used in pile foundation construction, typically employ a multi-section rigid structure for their drilling mast mechanism to meet the verticality and rigidity requirements during construction. Due to strict road regulations on transport dimensions (especially height and length), the drilling mast must be folded or retracted before the entire machine is moved to another location.

[0003] In existing technologies, the folding scheme of the drilling mast mechanism generally involves two stages: the bottom drilling mast flips backward and the top drilling mast lays forward. This process often relies on manual insertion and removal of pins and securing, or on the assistance of external machinery such as cranes and forklifts. However, the above-mentioned operating methods have the following significant drawbacks:

[0004] Firstly, the high degree of human intervention means that operators need to work at height and close to the machine position under or to the side of the drilling mast, which makes them extremely vulnerable to the threat of unexpected swaying of structural components or hydraulic depressurization, resulting in a high risk of personal injury.

[0005] Secondly, the reliance on external machinery necessitates the allocation of additional resources on-site, which increases both the preparation time for relocation and the overall cost.

[0006] Therefore, how to avoid the high safety risks, low efficiency of site transfer, and high overall cost of traditional manual operation is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0007] The purpose of this application is to provide a drilling mast mechanism and a rotary drilling rig that solves the problems of high safety risks, low relocation efficiency and high overall cost of traditional manual operation.

[0008] To achieve the above objectives, this application provides a drilling mast mechanism, comprising:

[0009] First drilling mast body;

[0010] The second drill mast body is rotatably connected to the first end of the first drill mast body and is used to flip relative to the first drill mast body within a first angular range.

[0011] The first telescopic drive assembly has a first end rotatably connected to the first drill mast body and a second end rotatably connected to the second drill mast body, and is used to drive the second drill mast body to rotate relative to the first drill mast body.

[0012] The third drill mast body is rotatably connected to the second end of the first drill mast body and is used to flip relative to the first drill mast body within a second angle range.

[0013] The first link and the second link, the first end of the first link is rotatably connected to the third mast body, the second end of the first link is rotatably connected to the first end of the second link, and the second end of the second link is rotatably connected to the first mast body;

[0014] The second telescopic drive assembly has a first end rotatably connected to the rotatable connection between the first link and the second link, and a second end rotatably connected to the first drill mast body, for driving the third drill mast body to rotate relative to the first drill mast body.

[0015] In some embodiments, a receiving cavity is provided at one end of the first drilling mast body near the second drilling mast body, and a first hinge seat is provided in the receiving cavity. The first end of the first telescopic drive assembly is rotatably connected to the first hinge seat through a first pin. When the first telescopic drive assembly is in a fully retracted state, the second drilling mast body is extended to the working state relative to the first drilling mast body, and the first telescopic drive assembly can be accommodated in the receiving cavity.

[0016] In some embodiments, the second mast body is rotatably connected to the first mast body via a first hinge shaft, the second mast body is connected to a second hinge seat, and the second end of the first telescopic drive assembly is rotatably connected to the second hinge seat via a second pin. When the first telescopic drive assembly is in a fully extended state, the second mast body is folded relative to the first mast body to a transport state.

[0017] In some embodiments, a third hinge seat is connected to one end of the third mast body near the first mast body, and a fourth hinge seat is connected to one end of the first mast body near the third mast body. The first end of the first connecting rod is rotatably connected to the third hinge seat via a third pin, and the second end of the second connecting rod is rotatably connected to the fourth hinge seat via a fourth pin.

[0018] In some embodiments, the second end of the first link, the first end of the second link, and the first end of the second telescopic drive assembly are rotatably connected by a fifth pin. The first mast body is also connected to a fifth hinge seat. The second end of the second telescopic drive assembly is rotatably connected to the fifth hinge seat by a sixth pin. When the second telescopic drive assembly is in a fully retracted state, the third mast body is folded relative to the first mast body to a transport state. When the second telescopic drive assembly is in a fully extended state, the third mast body is unfolded relative to the first mast body to a working state.

[0019] In some embodiments, the mast mechanism further includes a second hinge shaft, which is fixed to the lug plate of the first mast body by a first clamping plate, and the third mast body is rotatably connected to the second hinge shaft.

[0020] In some embodiments, the second angle range is greater than the first angle range; and / or

[0021] A limit block is provided at the rotatable connection between the first and second links to limit the maximum tilting angle of the third mast body.

[0022] In some embodiments, the first mast body is provided with a first angle sensor for detecting the tilting angle of the second mast body and a second angle sensor for detecting the tilting angle of the third mast body.

[0023] The mast mechanism also includes a controller, which is electrically connected to a first angle sensor and a second angle sensor to achieve closed-loop control of the folding action.

[0024] In some embodiments, the drill mast mechanism further includes:

[0025] The handheld wireless remote control features a dedicated folding / unfolding button and an emergency stop switch;

[0026] The vehicle-mounted wireless receiver module communicates with the controller and is used to receive folding or unfolding commands from the handheld wireless remote control.

[0027] The logic interlock module, built into the controller, is used to determine, after receiving a remote control command, whether the current state of the whole machine meets the preset safety conditions, and then control the first telescopic drive component and the second telescopic drive component to perform corresponding actions in sequence, and to send a completion signal to the handheld wireless remote control after the action is completed.

[0028] This application also provides a rotary drilling rig, including the drilling mast mechanism described in any of the above claims.

[0029] Compared with the above background technology, the drilling mast mechanism provided in the embodiments of this application includes a first drilling mast body, a second drilling mast body, a third drilling mast body, a first telescopic drive assembly, a first connecting rod, a second connecting rod, and a second telescopic drive assembly. The second mast body is rotatably connected to the first end of the first mast body, and is used to rotate relative to the first mast body within a first angular range. The first end of the first telescopic drive assembly is rotatably connected to the first mast body, and the second end of the first telescopic drive assembly is rotatably connected to the second mast body. The first telescopic drive assembly is used to drive the second mast body to rotate relative to the first mast body. The third mast body is rotatably connected to the second end of the first mast body, and is used to rotate relative to the first mast body within a second angular range. The first end of the first connecting rod is rotatably connected to the third mast body, the second end of the first connecting rod is rotatably connected to the first end of the second connecting rod, and the second end of the second connecting rod is rotatably connected to the first mast body. The first end of the second telescopic drive assembly is rotatably connected to the rotatable connection between the first and second connecting rods, and the second end of the second telescopic drive assembly is rotatably connected to the first mast body. The second telescopic drive assembly is used to drive the third mast body to rotate relative to the first mast body.

[0030] The beneficial effects of this drill mast mechanism mainly include:

[0031] Firstly, the first telescopic drive assembly and the second telescopic drive assembly form a closed-loop drive chain with the corresponding mast body. The entire process of folding / unfolding the mast mechanism is completed independently by the telescopic drive assembly. The operator only needs to trigger the action and does not need to enter under or to the side of the mast to manually insert pins or tie them, thus completely avoiding the risk of personal injury caused by accidental swing of structural components or hydraulic pressure loss.

[0032] Secondly, the power required for the folding / unfolding action of the drilling mast mechanism comes from the telescopic drive component, which is a configuration of the drilling rig itself, eliminating the need to allocate resources such as cranes and forklifts. The entire machine can be quickly folded after arriving at the relocation site, significantly shortening the relocation preparation time and reducing overall transportation costs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the second mast body of the drilling mast mechanism folded relative to the first mast body in an embodiment of this application.

[0035] Figure 2 This is a schematic diagram of the second drill mast body of the drill mast mechanism in an embodiment of this application unfolded relative to the first drill mast body.

[0036] Figure 3 This is a schematic diagram of the third mast body of the drilling mast mechanism folded relative to the first mast body in an embodiment of this application.

[0037] Figure 4 This is a schematic diagram of the third drilling mast body of the drilling mast mechanism in an embodiment of this application unfolded relative to the first drilling mast body.

[0038] Figure 5 This is a partial disassembly diagram of the assembly of the third drilling mast body and the first drilling mast body in the embodiment of this application.

[0039] Figure 6 This is a schematic diagram of the overall structure of the rotary drilling rig in the embodiments of this application.

[0040] in:

[0041] 1-Second mast body, 2-Second hinge seat, 3-Second pin, 4-First telescopic drive assembly, 5-First pin, 6-First hinge seat, 7-First mast body, 8-First hinge seat shaft, 9-Third mast body, 10-Third hinge seat, 11-Third pin, 12-First connecting rod, 13-Fifth pin, 14-Second hinge seat shaft, 15-First clamping plate, 16-Second connecting rod, 17-Fourth pin, 18-Fourth hinge seat, 19-Second telescopic drive assembly, 20-Sixth pin, 21-Second clamping plate, 22-Fifth hinge seat. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0045] Please refer to Figures 1 to 6 , Figure 1 This is a schematic diagram of the second mast body of the drilling mast mechanism folded relative to the first mast body in an embodiment of this application. Figure 2 This is a schematic diagram of the second drill mast body of the drill mast mechanism in an embodiment of this application unfolded relative to the first drill mast body. Figure 3 This is a schematic diagram of the third mast body of the drilling mast mechanism folded relative to the first mast body in an embodiment of this application. Figure 4 This is a schematic diagram of the third drilling mast body of the drilling mast mechanism in an embodiment of this application unfolded relative to the first drilling mast body. Figure 5 This is a partial disassembly diagram of the assembly of the third drilling mast body and the first drilling mast body in the embodiment of this application. Figure 6 This is a schematic diagram of the overall structure of the rotary drilling rig in the embodiments of this application.

[0046] The drilling mast mechanism provided in this application embodiment includes a first drilling mast body 7, a second drilling mast body 1, a third drilling mast body 9, a first telescopic drive assembly 4, a first connecting rod 12, a second connecting rod 16, and a second telescopic drive assembly 19.

[0047] The second drill mast body 1 is rotatably connected to the first end of the first drill mast body 7 (e.g., Figure 1(As shown on the left end), the second drill mast body 1 is used to rotate relative to the first drill mast body 7 within a first angle range. The first angle range can be 0-90°.

[0048] The first end of the first telescopic drive assembly 4 is rotatably connected to the first drill mast body 7, and the second end of the first telescopic drive assembly 4 is rotatably connected to the second drill mast body 1. The first telescopic drive assembly 4 is used to drive the second drill mast body 1 to rotate relative to the first drill mast body 7.

[0049] The third mast body 9 is rotatably connected to the second end of the first mast body 7 (e.g., Figure 3 (As shown on the right end), the third mast body 9 is used to rotate relative to the first mast body 7 within a second angle range. The second angle range can be 0-180°.

[0050] The first end of the first connecting rod 12 is rotatably connected to the third mast body 9, the second end of the first connecting rod 12 is rotatably connected to the first end of the second connecting rod 16, and the second end of the second connecting rod 16 is rotatably connected to the first mast body 7.

[0051] The first end of the second telescopic drive assembly 19 is rotatably connected to the rotatable connection between the first link 12 and the second link 16, and the second end of the second telescopic drive assembly 19 is rotatably connected to the first drill mast body 7. The second telescopic drive assembly 19 is used to drive the third drill mast body 9 to flip relative to the first drill mast body 7.

[0052] Of course, depending on actual needs, both the first telescopic drive assembly 4 and the second telescopic drive assembly 19 can be configured as folding hydraulic cylinder assemblies. The first drill mast body 7 specifically includes a long drill mast section and a middle drill mast section, wherein the long drill mast section is used for rotatable connection with the second drill mast body 1, and the middle drill mast section is used for rotatable connection with the third drill mast body 9.

[0053] With this configuration, the first telescopic drive assembly 4 and the second telescopic drive assembly 19 form a closed-loop drive chain with the corresponding mast body. The entire folding / unfolding process of the mast is completed independently by the telescopic drive assembly. The operator only needs to trigger the action and does not need to enter under or to the side of the mast to manually insert pins or secure it, thus completely avoiding the risk of personal injury caused by accidental swaying of structural components or hydraulic pressure loss. At the same time, the power required for the folding / unfolding action of the mast comes from the telescopic drive assembly, which is a built-in component of the drilling rig and does not require the allocation of cranes, forklifts, or other resources. The entire machine can be quickly folded after arriving at the relocation site, significantly shortening the relocation preparation time and reducing overall transportation costs.

[0054] In some embodiments, the first mast body 7 is provided with a receiving cavity (or cavity) at one end near the second mast body 1, and a first hinge seat 6 is provided in the receiving cavity. The first end of the first telescopic drive assembly 4 (specifically a cylinder ear ring) is rotatably connected to the first hinge seat 6 through a first pin 5.

[0055] In this way, when the first telescopic drive assembly 4 is in the fully retracted state, the second drill mast body 1 is deployed to the working state relative to the first drill mast body 7, and the first telescopic drive assembly 4 can be accommodated in the accommodating cavity.

[0056] As can be seen, the retracted first telescopic drive assembly 4 is completely hidden in the accommodating cavity without any protruding parts. It will not be scratched or collided when loading and unloading vehicles, passing through tunnels or over bridges and culverts, thus avoiding oil leakage caused by damage to the cylinder piston rod and seals, and extending its service life.

[0057] In some embodiments, the second mast body 1 and the first mast body 7 are rotatably connected by the first hinge shaft 8, the second mast body 1 is connected to the second hinge seat 2, and the second end of the first telescopic drive assembly 4 (specifically the piston rod clevis) is rotatably connected to the second hinge seat 2 by the second pin 3.

[0058] In this way, when the first telescopic drive assembly 4 is in the fully extended state, the second mast body 1 is folded relative to the first mast body 7 into the transport state.

[0059] As can be seen from the above, the second hinge seat 2 of the second mast body 1 is connected to the piston rod lug of the first telescopic drive assembly 4 via the second pin 3, and the first hinge seat 6 inside the first mast body 7 is connected to the cylinder lug of the first telescopic drive assembly 4 via the first pin 5. When the first telescopic drive assembly 4 extends, the second mast body 1 will rotate around the first hinge seat shaft 8 connected to the first mast body 7. After the first telescopic drive assembly 4 extends to its full stroke, the second mast body 1 folds into its transport state, as shown below. Figure 1 As shown. When the first telescopic drive assembly 4 retracts, the second mast body 1 will rotate in the opposite direction around the first hinge axis 8 connected to the first mast body 7. After the first telescopic drive assembly 4 retracts to its full stroke, the second mast body 1 can just return to its working state, as shown. Figure 2 As shown.

[0060] In some embodiments, a third hinge seat 10 is connected to one end of the third mast body 9 near the first mast body 7, and a fourth hinge seat 18 is connected to one end of the first mast body 7 near the third mast body 9. The first end of the first connecting rod 12 is rotatably connected to the third hinge seat 10 via a third pin 11, and the second end of the second connecting rod 16 is rotatably connected to the fourth hinge seat 18 via a fourth pin 17.

[0061] Furthermore, the second end of the first link 12, the first end of the second link 16, and the first end of the second telescopic drive assembly 19 are rotatably connected by the fifth pin 13. The first mast body 7 is also connected to the fifth hinge seat 22, and the second end of the second telescopic drive assembly 19 is rotatably connected to the fifth hinge seat 22 by the sixth pin 20.

[0062] For example, the sixth pin 20 is fixed to the fifth hinge seat 22 by the second clamping plate 21, and the second end of the second telescopic drive assembly 19 is rotatably connected to the sixth pin 20. Figure 5 As shown.

[0063] In this way, when the second telescopic drive assembly 19 is in the fully retracted state, the third mast body 9 is folded relative to the first mast body 7 to the transport state, and when the second telescopic drive assembly 19 is in the fully extended state, the third mast body 9 is unfolded relative to the first mast body 7 to the working state.

[0064] In some embodiments, the drill mast mechanism further includes a second hinge shaft 14, which is fixed to the lug plate of the first drill mast body 7 by a first retaining plate 15, and the third drill mast body 9 is rotatably connected to the second hinge shaft 14.

[0065] As can be seen from the above, the third hinge seat 10 on the third mast body 9 is connected to the first connecting rod 12 via the third pin 11. Then, the first connecting rod 12, the second connecting rod 16, and the piston rod lug of the second telescopic drive assembly 19 are connected via the fifth pin 13. Next, the second connecting rod 16 is connected to the fourth hinge seat 18 of the middle mast portion of the first mast body 7 via the fourth pin 17. Finally, the cylinder lug of the second telescopic drive assembly 19 is connected to the fifth hinge seat 22 via the sixth pin 20 and the second clamping plate 21. When the second telescopic drive assembly 19 retracts, the third mast body 9 will rotate around the second hinge seat shaft 14 connected to the middle mast portion of the first mast body 7. After the second telescopic drive assembly 19 retracts to its full stroke, the third mast body 9 folds into its transport state, as shown below. Figure 3 As shown. When the second telescopic drive assembly 19 extends, the third drill mast body 9 can just return to the working state, as... Figure 4 As shown.

[0066] In some embodiments, the second angle range is greater than the first angle range, for example, the second angle range may be 0-180° and the first angle range may be 0-90°.

[0067] In order to facilitate limiting the maximum tilting angle of the third mast body 9 and prevent the third mast body 9 from tilting excessively and causing safety risks, a limiting block is provided at the rotational connection between the first link 12 and the second link 16. The limiting block is used to limit the maximum tilting angle of the third mast body 9.

[0068] Traditional folding operations lack continuous, closed-loop automated control. The reliability of pin positioning and locking is affected by human factors, posing a risk of misoperation, which in turn affects transportation safety and subsequent construction efficiency.

[0069] In contrast, in this embodiment, the first drilling mast body 7 is equipped with a first angle sensor for detecting the tilting angle of the second drilling mast body 1, and a second angle sensor for detecting the tilting angle of the third drilling mast body 9. The first and second angle sensors are absolute encoders or magnetostrictive displacement sensors, and their detection signals are fed back to the controller in real time via a CAN bus.

[0070] The mast mechanism also includes a controller, which is electrically connected to a first angle sensor and a second angle sensor to achieve closed-loop control of the folding action.

[0071] In some embodiments, the mast drilling mechanism further includes a handheld wireless remote controller, a vehicle-mounted wireless receiver module, and a logic interlock module. The handheld wireless remote controller is equipped with a dedicated folding / unfolding button and an emergency stop switch. The vehicle-mounted wireless receiver module is communicatively connected to the controller and is used to receive folding or unfolding commands from the handheld wireless remote controller. The logic interlock module is built into the controller and, upon receiving a remote control command, first determines if the current state of the entire machine meets preset safety conditions, then sequentially controls the first telescopic drive component 4 and the second telescopic drive component 19 to perform corresponding actions, and sends a completion signal back to the handheld wireless remote controller after the actions are completed.

[0072] In this way, the tilting angles of the second and third mast bodies 1 and 9 are monitored in real time by angle sensors, and the signals are fed back to the vehicle controller. The controller then sequentially activates the first telescopic drive assembly 4 and the second telescopic drive assembly 19 according to a preset program, ensuring that the two-stage folding action is performed in the correct sequence and at a controllable speed. Once in place, the mechanical locking device automatically engages, forming a reliable double safety net to prevent unlocking or partial locking due to human error, thereby improving transportation safety and subsequent construction efficiency.

[0073] The above-mentioned setup enables the automatic folding and resetting of the drilling mast mechanism, which facilitates automated, continuous, and closed-loop control, reduces the impact of human factors, minimizes the risk of misoperation, and thus improves the safety of transportation and the efficiency of subsequent construction.

[0074] The rotary drilling rig provided in this application, such as Figure 6 As shown, this includes the drilling mast mechanism described in the specific embodiments above; other parts of the rotary drilling rig can be referred to in related technologies, and will not be elaborated here.

[0075] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0076] The drilling mast mechanism and rotary drilling rig provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A drilling mast mechanism, characterized in that, include: First drilling mast body (7); The second drill mast body (1) is rotatably connected to the first end of the first drill mast body (7) and is used to flip relative to the first drill mast body (7) within a first angle range. The first telescopic drive assembly (4) has a first end rotatably connected to the first drill mast body (7) and a second end rotatably connected to the second drill mast body (1), and is used to drive the second drill mast body (1) to flip relative to the first drill mast body (7). The third drill mast body (9) is rotatably connected to the second end of the first drill mast body (7) and is used to flip relative to the first drill mast body (7) within a second angle range. The first link (12) and the second link (16) are connected in a rotatable manner to the third mast body (9), the second end of the first link (12) is connected in a rotatable manner to the first end of the second link (16), and the second end of the second link (16) is connected in a rotatable manner to the first mast body (7). The second telescopic drive assembly (19) has its first end rotatably connected to the rotatable connection between the first link (12) and the second link (16), and its second end rotatably connected to the first drill mast body (7), for driving the third drill mast body (9) to flip relative to the first drill mast body (7).

2. The drilling mast mechanism as described in claim 1, characterized in that, The first mast body (7) has a receiving cavity at one end near the second mast body (1). The receiving cavity has a first hinge seat (6). The first end of the first telescopic drive assembly (4) is rotatably connected to the first hinge seat (6) through a first pin (5). When the first telescopic drive assembly (4) is in a fully retracted state, the second mast body (1) is extended to the working state relative to the first mast body (7), and the first telescopic drive assembly (4) can be accommodated in the receiving cavity.

3. The drilling mast mechanism as described in claim 2, characterized in that, The second drill mast body (1) is rotatably connected to the first drill mast body (7) via the first hinge shaft (8). The second drill mast body (1) is connected to the second hinge seat (2). The second end of the first telescopic drive assembly (4) is rotatably connected to the second hinge seat (2) via the second pin (3). When the first telescopic drive assembly (4) is in the fully extended state, the second drill mast body (1) is folded relative to the first drill mast body (7) to the transport state.

4. The drilling mast mechanism as described in claim 1, characterized in that, The third mast body (9) is connected to a third hinge seat (10) at one end near the first mast body (7), and the first mast body (7) is connected to a fourth hinge seat (18) at one end near the third mast body (9). The first end of the first connecting rod (12) is rotatably connected to the third hinge seat (10) via a third pin (11), and the second end of the second connecting rod (16) is rotatably connected to the fourth hinge seat (18) via a fourth pin (17).

5. The drill mast mechanism as described in claim 4, characterized in that, The second end of the first connecting rod (12), the first end of the second connecting rod (16), and the first end of the second telescopic drive assembly (19) are rotatably connected by the fifth pin (13). The first drill mast body (7) is also connected to the fifth hinge seat (22). The second end of the second telescopic drive assembly (19) is rotatably connected to the fifth hinge seat (22) by the sixth pin (20). When the second telescopic drive assembly (19) is in the fully retracted state, the third drill mast body (9) is folded to the transport state relative to the first drill mast body (7). When the second telescopic drive assembly (19) is in the fully extended state, the third drill mast body (9) is unfolded to the working state relative to the first drill mast body (7).

6. The drill mast mechanism as described in claim 5, characterized in that, The drilling mast mechanism also includes a second hinge shaft (14), which is fixed to the ear plate of the first drilling mast body (7) by a first clamping plate (15), and the third drilling mast body (9) is rotatably connected to the second hinge shaft (14).

7. The drilling mast mechanism as described in any one of claims 1-6, characterized in that, The second angle range is greater than the first angle range; and / or A limiting block is provided at the rotatable connection between the first link (12) and the second link (16) to limit the maximum tilt angle of the third drill mast body (9).

8. The drilling mast mechanism as described in any one of claims 1-6, characterized in that, The first drill mast body (7) is provided with a first angle sensor for detecting the flip angle of the second drill mast body (1) and a second angle sensor for detecting the flip angle of the third drill mast body (9); The drill mast mechanism also includes a controller, which is electrically connected to the first angle sensor and the second angle sensor to achieve closed-loop control of the folding action.

9. The drilling mast mechanism as described in claim 8, characterized in that, The drill mast mechanism also includes: The handheld wireless remote control features a dedicated folding / unfolding button and an emergency stop switch; The vehicle-mounted wireless receiver module is communicatively connected to the controller and is used to receive folding or unfolding commands issued by the handheld wireless remote control. The logic interlock module, built into the controller, is used to determine, after receiving the remote control command, whether the current state of the whole machine meets the preset safety conditions, and then control the first telescopic drive component (4) and the second telescopic drive component (19) to perform corresponding actions in sequence, and to send a completion signal to the handheld wireless remote controller after the action is completed.

10. A rotary drilling rig, characterized in that, Includes the drill mast mechanism as described in any one of claims 1-9.

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