A telescopic guide drilling device

Abstract

The utility model discloses a telescopic guiding drilling device, including the drilling rod mobile subassembly of installing on the work table, first support subassembly, second support subassembly and drilling mechanism are installed in turn on the drilling rod mobile subassembly, the guiding mechanism is installed on the work table one end, the drilling rod is rotatably installed in the guiding mechanism, first support subassembly and second support subassembly in proper order, drilling rod mobile subassembly is driven to be connected with drilling mechanism, the guiding mechanism is located first support subassembly one side of facing away from second support subassembly, and one end of drilling rod is connected with drilling mechanism and installs, and drilling rod mobile subassembly drives the drilling rod transverse displacement through drilling mechanism, and drilling mechanism drives the drilling rod rotation and carries out drilling. The utility model discloses through guiding mechanism realizes can accurate alignment workpiece need drilling's position, and when the whole structural design of the utility model carries out drilling deep hole, realizes drilling precision, drilling effect is good and drilling efficiency is high, avoids the quality problem such as axis deviation, hole diameter expansion or hole shape is not round and so on that drilling appears.

Description

Technical Field

[0001] This utility model relates to the field of drilling devices, and in particular to a telescopic guide drilling device. Background Technology

[0002] Before the 1960s, deep hole machining technology was mainly confined to the defense and military industries. However, since the 1980s, with continuous technological innovation and the booming development of manufacturing, deep hole machining technology has gradually permeated various industries, becoming an indispensable part of manufacturing. Unfortunately, the high-end deep hole machining tool market has always been dominated by foreign companies.

[0003] BTA deep hole drill bits are specifically designed for deep hole machining, with a length-to-diameter ratio as high as 50 times their diameter. They are widely used in various fields of machining and manufacturing, such as petrochemicals, boiler containers, and nuclear power tube sheets. The characteristics of deep hole drills are their slender shanks, relatively weak rigidity, and difficulty in chip removal, thus requiring extremely high chip quality. Because deep hole drills cut inside the hole, the cutting process and tool wear cannot be directly observed. During drilling, the drill bit often experiences "deviation," which can lead to quality problems such as deviation of the drilled hole axis, enlarged hole diameter, or non-circular hole shape. Simultaneously, the protruding flanges around the workpiece can easily interfere with the guiding device, causing the deep hole drill to fail to align with the required drilling position on the workpiece. This reduces the positioning accuracy and convenience of the deep hole drill, and these problems have long hindered the development of the deep hole drilling machining industry. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a telescopic guide drilling device.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The telescopic guide drilling device includes a worktable, a drill rod, a guide mechanism, a first support assembly, a second support assembly, a drilling mechanism, and a drill rod moving assembly. The drill rod moving assembly is mounted on the worktable. The first support assembly, the second support assembly, and the drilling mechanism are slidably mounted on the drill rod moving assembly in sequence, and the drill rod moving assembly is drivenly connected to the drilling mechanism. The guide mechanism is mounted on one end of the worktable and is located on the side of the first support assembly facing away from the second support assembly. The drill rod is rotatably mounted in the guide mechanism, the first support assembly, and the second support assembly in sequence, and one end of the drill rod is connected to the drilling mechanism. The drill rod moving assembly drives the drill rod to move laterally through the drilling mechanism, and the drilling mechanism drives the drill rod to rotate to perform drilling.

[0006] Preferably, the guiding mechanism includes a front guide box, a guide sleeve, a connecting sleeve, a hydraulic cylinder guide sleeve, a front copper sleeve, a rear copper sleeve, a front guide sleeve, and a guide nut. The front guide box is installed on one end of the worktable, the guide sleeve is installed inside the front guide box, the connecting sleeve is movably and telescopically installed inside the guide sleeve, the hydraulic cylinder guide sleeve is embedded in one end of the guide sleeve and is sleeved on one end of the connecting sleeve, the front guide sleeve is fixedly installed on one end face of the connecting sleeve, the front copper sleeve is embedded in the same end of the connecting sleeve, the rear copper sleeve is embedded in the other end of the connecting sleeve, and the guide nut is threaded to the other end of the connecting sleeve and provides lateral limitation for the rear copper sleeve. The drill rod is movably embedded in the front guide sleeve, the front copper sleeve, the rear copper sleeve, and the guide nut in sequence. The front guide sleeve, the front copper sleeve, and the rear copper sleeve support and guide the drill rod to slide and telescopically within the connecting sleeve.

[0007] Specifically, a partition ring is integrally formed on the circumference of the connecting sleeve, and a sealing ring is integrally formed inside the guide sleeve. A first annular cavity for accommodating hydraulic oil is formed between the end face of the hydraulic cylinder guide sleeve near the rear copper sleeve, the inner wall of one end of the guide sleeve, the sealing ring of the guide sleeve, and the outer wall of the connecting sleeve. The partition ring is located between the hydraulic cylinder guide sleeve and the sealing ring, and the partition ring divides the first annular cavity into an inwardly contracting hydraulic cavity and an outwardly extending hydraulic cavity.

[0008] Specifically, the front guide box is provided with a first oil supply hole and a second oil supply hole, and the guide sleeve is provided with a third oil supply hole and a fourth oil supply hole. The first oil supply hole, the third oil supply hole and the extended oil pressure chamber are connected, and the second oil supply hole and the fourth oil supply hole and the retracted oil pressure chamber are connected.

[0009] Specifically, a second annular cavity for containing coolant is formed between the inner wall of the other end of the guide sleeve, the sealing ring of the guide sleeve, and the outer wall of the connecting sleeve. A third annular cavity for containing coolant is formed between the front copper sleeve, the rear copper sleeve, the connecting sleeve, and the drill rod. A first coolant hole is also provided on the front guide box. A second coolant hole is also provided on the guide sleeve. A plurality of third coolant holes are provided on the connecting sleeve. The first coolant hole, the second coolant hole, the second annular cavity, the plurality of third coolant holes, and the third annular cavity are connected. A fourth coolant hole is provided at the bottom of the guide sleeve. The third annular cavity, the plurality of third coolant holes, and the fourth coolant hole are connected.

[0010] Preferably, the first support assembly includes a guide bracket, a support bearing, and a support sleeve. The guide bracket is slidably mounted on the drill pipe moving assembly, the support bearing is embedded in the guide bracket, and the support sleeve is embedded in the support bearing and movably mounted on the drill pipe. The structure of the second support component is the same as that of the first support component.

[0011] Preferably, the drilling mechanism includes a spindle box, a spindle, a connecting chuck, a sleeve, a rotary joint bearing, a synchronous belt drive assembly, and a drill rod rotation drive device. The spindle box is laterally slidably mounted on the drill rod moving assembly. The spindle is laterally mounted on the bottom of the spindle box. The connecting chuck is fixedly mounted on one end face of the spindle. The sleeve is embedded in the connecting chuck. One end of the drill rod is fixedly mounted in the connecting chuck through the sleeve. The rotary joint bearing is sleeved on the other end of the spindle. The drill rod rotation drive device is laterally mounted on the upper end of the spindle box. The drill rod rotation drive device is connected to the spindle via the synchronous belt drive assembly.

[0012] Specifically, the drill rod has a first through hole in the axial direction, the center of the collet has a second through hole, the center of the connecting chuck has a third through hole, and the spindle has a fourth through hole in the axial direction. The first through hole, the second through hole, the third through hole, the fourth through hole and the center hole of the rotary joint bearing are connected.

[0013] Preferably, a controller is provided for signal control of components such as the drilling mechanism and the drill rod moving assembly. The controller is a PLC programmable logic controller, which can be a programmable logic controller of model XDS-40T-D, but is not limited thereto.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. By installing a guide mechanism on one end of the worktable, and the guide mechanism being located on the side of the first support assembly facing away from the second support assembly, the drill rod is sequentially rotated and installed in the guide mechanism, the first support assembly, and the second support assembly. The guide mechanism adopts a telescopic structure, and the guide sleeve of the guide mechanism has a built-in connecting sleeve. The connecting sleeve is controlled to telescopically move by using a servo cylinder or by supplying oil through an oil supply system. The telescopic stroke of the connecting sleeve is 0-500mm, which enables normal high-precision drilling when the flange height on the side of the workpiece is ≤500mm. This avoids interference between the side flange of the workpiece to be drilled and the guide sleeve, making the positioning of the drill rod more efficient and convenient.

[0015] 2. Its overall structural design not only enables automatic deep drilling of workpieces, cooling of the drill rod, support and vibration reduction for the extended length of the drill rod, and automatic removal of waste chips generated during drilling, but also improves the durability and stability of the drill rod. It reduces the vibration of the rotating drill rod on the guide bracket, thus enhancing the smoothness of the drill rod's rotation. This ensures smooth and efficient drilling of the workpiece, giving it the advantages of high drilling accuracy, high drilling efficiency, and good drilling effect. It avoids quality problems such as axis deviation, enlarged hole diameter, or non-round hole shape in workpieces drilled using this method. It effectively solves the problems often encountered with existing deep hole drills, such as axis deviation, enlarged hole diameter, or non-round hole shape caused by drill bit deviation during drilling. Furthermore, it solves the problem of poor drilling accuracy, poor drilling effect, and inconvenient positioning in deep hole drilling caused by the protruding flanges around the workpiece easily interfering with the guide device, preventing the deep hole drill tool from being aligned with the required drilling position. Attached Figure Description

[0016] For ease of explanation, the present invention will be described in detail below with reference to the preferred embodiments and accompanying drawings.

[0017] Figure 1 This is a perspective view of a telescopic guide drilling device according to the present invention.

[0018] Figure 2 This is a cross-sectional structural diagram of the guide mechanism of a telescopic guide drilling device according to the present invention.

[0019] Figure 3 This is an exploded perspective view of the guiding mechanism of a telescopic guide drilling device according to the present invention.

[0020] Figure 4 This is a perspective view of the first or second support component of a telescopic guide drilling device according to the present invention.

[0021] Figure 5 This is a perspective view of the drilling mechanism of a telescopic guide drilling device according to the present invention.

[0022] Figure 6 This is a three-dimensional schematic diagram of the drilling transmission structure of a telescopic guide drilling device according to this utility model.

[0023] Figure 7 This is a cross-sectional schematic diagram of the assembly structure of the drill rod, spindle, and rotary joint bearing of a telescopic guide drilling device according to this utility model. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] Reference Figure 1 As shown, a telescopic guided drilling device of this utility model includes a worktable 1, a drill rod 2, a guide mechanism 3, a first support assembly 41, a second support assembly 42, a drilling mechanism 5, and a drill rod moving assembly 6. The drill rod moving assembly 6 is mounted on the worktable 1. The first support assembly 41, the second support assembly 42, and the drilling mechanism 5 are sequentially slidably mounted on the drill rod moving assembly 6, and the drill rod moving assembly 6 is drivenly connected to the drilling mechanism 5. The guide mechanism 3 is mounted on one end of the worktable 1, and the guide mechanism 3 is located on the side of the first support assembly 41 facing away from the second support assembly 42. The drill rod 2 is sequentially rotatably mounted in the guide mechanism 3, the first support assembly 41, and the second support assembly 42, and one end of the drill rod 2 is connected and installed to the drilling mechanism 5. The drill rod moving assembly 6 drives the drill rod 2 to move laterally through the drilling mechanism 5, and the drilling mechanism 5 drives the drill rod 2 to rotate to perform drilling.

[0027] Reference Figures 2 to 3 As shown, the guiding mechanism 3 includes a front guide box 31, a guide sleeve 32, a connecting sleeve 33, a hydraulic cylinder guide sleeve 34, a front copper sleeve 35, a rear copper sleeve 36, a front guide sleeve 37, and a guide nut 38. The front guide box 31 is mounted on one end of the worktable 1. The guide sleeve 32 is mounted inside the front guide box 31. The connecting sleeve 33 is movably and telescopically mounted inside the guide sleeve 32. The hydraulic cylinder guide sleeve 34 is embedded in one end of the guide sleeve 32 and is sleeved on one end of the connecting sleeve 33. The front guide sleeve 35... 7 is fixedly installed on one end face of the connecting sleeve 33. The front copper sleeve 35 is embedded in the same end of the connecting sleeve 33, and the rear copper sleeve 36 is embedded in the other end of the connecting sleeve 33. The guide nut 38 is threadedly connected to the other end of the connecting sleeve 33 and provides lateral limitation for the rear copper sleeve 36. The drill rod 2 is sequentially movably embedded in the front guide sleeve 37, the front copper sleeve 35, the rear copper sleeve 36 and the guide nut 38. The front guide sleeve 37, the front copper sleeve 35 and the rear copper sleeve 36 support and guide the drill rod 2 to slide and extend within the connecting sleeve 33.

[0028] Reference Figure 2As shown, a partition ring 39 is integrally formed on the circumference of the connecting sleeve 33, and a sealing ring 30 is integrally formed inside the guide sleeve 32. A first annular cavity 301 for accommodating hydraulic oil is formed between the end face of the cylinder guide sleeve 34 near the rear copper sleeve 36, the inner wall of one end of the guide sleeve 32, the sealing ring 30 of the guide sleeve 32, and the outer wall of the connecting sleeve 33. The partition ring 39 is located between the cylinder guide sleeve 34 and the sealing ring 30, and the partition ring 39 divides the first annular cavity 301 into an inwardly contracted hydraulic cavity 304 and an outwardly extending hydraulic cavity 305.

[0029] By adopting the above technical solution, the cylinder guide sleeve 34 seals the same end of the guide sleeve 32 and the connecting sleeve 33, and the sealing ring 30 seals between the guide sleeve 32 and the connecting sleeve 33, ensuring good sealing performance of the oil storage in the inner retracted oil pressure chamber 304 and the extended oil pressure chamber 305.

[0030] Reference Figure 2 As shown, the front guide box 31 is provided with a first oil supply hole 306 and a second oil supply hole 307, and the guide sleeve 32 is provided with a third oil supply hole 308 and a fourth oil supply hole 309. The first oil supply hole 306, the third oil supply hole 308 and the extended oil pressure chamber 305 are connected, and the second oil supply hole 307, the fourth oil supply hole 309 and the retracted oil pressure chamber 304 are connected.

[0031] By adopting the above technical solution, since the first oil supply hole 306 and the second oil supply hole 307 are respectively connected to the external oil supply system, oil is supplied to the extended oil pressure chamber 305 through the first oil supply hole 306 and the third oil supply hole 308. The connecting sleeve 33 extends out of the guide sleeve 32, and the front guide sleeve 37, the front copper sleeve 35 and the rear copper sleeve 36 move with the connecting sleeve 33. When the drill rod 2 extends a long enough from the guide sleeve 32 to reach the position where the workpiece needs to be drilled, the connecting sleeve 33 provides support for the extended drill rod 2 through the front guide sleeve 37, the front copper sleeve 35 and the rear copper sleeve 36. This avoids the drill rod 2 extending too far out of the guide sleeve 32 and the drill rod 2 shaking when drilling the workpiece without support, and avoids the drill bit being deflected by the interference of waste chips, which would cause the axis of the drill to deviate, the hole diameter to enlarge or... Quality issues such as uneven hole shape are addressed. Oil is supplied to the internally retracted hydraulic chamber 304 through the second oil supply hole 307 and the fourth oil supply hole 309. The connecting sleeve 33 retracts into the guide sleeve 32. The connecting sleeve 33 provides support for the retracted drill rod 2 through the front guide sleeve 37, the front copper sleeve 35, and the rear copper sleeve 36. At the same time, the drill rod 2 can extend out of the connecting sleeve 33 to reach the position where the workpiece needs to be drilled, or it can remain in place as needed. That is, as long as the drill rod 2 can reach the position where the workpiece needs to be drilled, it is acceptable. When the connecting sleeve 33 retracts into the guide sleeve 32, it avoids interference from the protruding flanges around the workpiece during drilling, which would prevent the drill rod 2 from being aligned with the position where the workpiece needs to be drilled. This improves the positioning accuracy and convenience of the drill rod 2.

[0032] Reference Figure 2 As shown, a second annular cavity 302 for containing coolant is formed between the inner wall of the other end of the guide sleeve 32, the sealing ring 30 of the guide sleeve 32, and the outer wall of the connecting sleeve 33. A third annular cavity 303 for containing coolant is formed between the front copper sleeve 35, the rear copper sleeve 36, the connecting sleeve 33, and the drill rod 2. A first coolant hole 3091 is also provided on the front guide box 31. A second coolant hole 3092 is also provided on the guide sleeve 32. A plurality of third coolant holes 3093 are provided on the connecting sleeve 33. The first coolant hole 3091, the second coolant hole 3092, the second annular cavity 302, the plurality of third coolant holes 3093, and the third annular cavity 303 are connected. A fourth coolant hole 3094 is provided at the bottom of the guide sleeve 32. The third annular cavity 303, the plurality of third coolant holes 3093, and the fourth coolant hole 3094 are connected.

[0033] By adopting the above technical solution, since the first coolant hole 3091 and the fourth coolant hole 3094 are respectively connected to the heat dissipation system, the heat dissipation system provides low-temperature coolant to the first coolant hole 3091, and the heat dissipation system recovers high-temperature coolant through the fourth coolant hole 3094, so as to circulate and provide low-temperature coolant to the third annular cavity 303 to cool down the drill rod 2, thereby improving the durability and stability of the drill rod 2.

[0034] Reference Figure 4 As shown, the first support assembly 41 includes a guide bracket 411, a support bearing 412, and a support sleeve 413. The guide bracket 411 is slidably mounted on the drill pipe moving assembly 6. The support bearing 412 is embedded in the guide bracket 411. The support sleeve 413 is embedded in the support bearing 412 and is movably sleeved on the drill pipe 2. The structure of the second support assembly 42 is the same as that of the first support assembly 41.

[0035] By adopting the above technical solution, the support sleeve 413 is movably sleeved on the drill rod 2. The drill rod 2 rotates in the support bearing 412 through the support sleeve 413. The drilling mechanism 5 drives the drill rod 2 to move laterally under the drive of the drill rod moving assembly 6. The drill rod 2 drives the guide bracket 411 to move back and forth laterally on the drill rod moving assembly 6 through the support sleeve 413 and the support bearing 412. When the drilling mechanism 5 drives the drill rod 2 away from the guide mechanism 3, the drill rod 2 drives the guide brackets 411 of the first support assembly 41 and the second support assembly 42 away from the guide mechanism 3, thereby providing support and shock absorption for the long and rotating drill rod 2 between the guide bracket 411 and the drilling mechanism 5. This reduces the vibration generated by the rotating drill rod 2 on the guide bracket 411 and improves the stability of the rotation of the drill rod 2.

[0036] Reference Figure 5 and Figure 6As shown, the drilling mechanism 5 includes a spindle box 51, a spindle 52, a connecting chuck 53, a sleeve 54, a rotary joint bearing 55, a synchronous belt drive assembly 56, and a drill rod rotation drive device 57. The spindle box 51 is laterally slidably mounted on the drill rod moving assembly 6. The spindle 52 is laterally mounted on the bottom of the spindle box 51. The connecting chuck 53 is fixedly mounted on one end face of the spindle 52. The sleeve 54 is embedded in the connecting chuck 53. One end of the drill rod 2 is fixedly mounted in the connecting chuck 53 through the sleeve 54. The rotary joint bearing 55 is sleeved on the other end of the spindle 52. The drill rod rotation drive device 57 is laterally mounted on the upper end of the spindle box 51. The drill rod rotation drive device 57 is connected to the spindle 52 through the synchronous belt drive assembly 56.

[0037] By adopting the above technical solution, the end of the drill rod 2 is fixedly installed in the connecting chuck 53 through the sleeve 54. The connecting chuck 53 holds the drill rod 2 and is fixedly installed on one end face of the spindle 52. The drill rod rotation drive device 57 drives the spindle 52 to rotate in the spindle box 51 through the synchronous belt transmission assembly 56, thereby driving the drill rod 2 to rotate. The drill rod moving assembly 6 drives the spindle box 51 to move laterally, thereby driving the drill rod 2 to move laterally, so as to realize that the drill rod 2 automatically performs deep drilling on the workpiece.

[0038] In this embodiment, the synchronous belt drive assembly 56 includes a driving synchronous pulley 561, a driven synchronous pulley 562, and a synchronous belt 563. The driving synchronous pulley 561 is mounted on the output end of the drill pipe rotation drive device 57, and the driven synchronous pulley 562 is mounted on the spindle 52. The driving synchronous pulley 561 is connected to the driven synchronous pulley 562 via the synchronous belt 563. The drill pipe rotation drive device 57 is preferably configured as a servo motor. The drill pipe moving assembly 6 includes a servo motor, a ball screw, and at least two linear guide rails arranged parallel to each other. The spindle box 51 is slidably mounted on the at least two linear guide rails. The ball screw is connected to the output shaft of the servo motor and is also connected to the spindle box 51.

[0039] Reference Figure 7 As shown, the drill rod 2 has a first through hole 21 along the axial direction, the sleeve 54 has a second through hole 22 at the center, the connecting chuck 53 has a third through hole 23 at the center, and the spindle 52 has a fourth through hole 24 along the axial direction. The first through hole 21, the second through hole 22, the third through hole 23, the fourth through hole 24 and the center hole of the rotary joint bearing 55 are connected.

[0040] Reference Figure 3 and Figure 7As shown, by adopting the above technical solution, the waste chips generated by the drill rod 2 when drilling the workpiece are discharged sequentially from the first through hole 21, the second through hole 22, the third through hole 23, the fourth through hole 24 and the center hole of the rotary joint bearing 55, which avoids the waste chips from interfering with the drill rod 2 and causing the drill rod 2 to jam, so as to ensure that the drill rod 2 can drill the workpiece smoothly and efficiently.

[0041] The above embodiments are merely examples of this utility model and are not intended to limit the implementation and scope of this utility model. All technical solutions that are the same as or equivalent to the contents described in the claims of this utility model should be included within the protection scope of this utility model.

Claims

1. A telescopic guide drilling device, comprising a worktable, characterized in that: It also includes a drill rod, a guide mechanism, a first support assembly, a second support assembly, a drilling mechanism, and a drill rod moving assembly. The drill rod moving assembly is mounted on the worktable. The first support assembly, the second support assembly, and the drilling mechanism are slidably mounted on the drill rod moving assembly in sequence, and the drill rod moving assembly is drivenly connected to the drilling mechanism. The guide mechanism is mounted on one end of the worktable and is located on the side of the first support assembly facing away from the second support assembly. The drill rod is rotatably mounted in the guide mechanism, the first support assembly, and the second support assembly in sequence, and one end of the drill rod is connected to the drilling mechanism. The drill rod moving assembly drives the drill rod to move laterally through the drilling mechanism, and the drilling mechanism drives the drill rod to rotate to perform drilling.

2. The telescopic guide drilling device according to claim 1, characterized in that: The guiding mechanism includes a front guide box, a guide sleeve, a connecting sleeve, a hydraulic cylinder guide sleeve, a front copper sleeve, a rear copper sleeve, a front guide sleeve, and a guide nut. The front guide box is installed on one end of the worktable, the guide sleeve is installed inside the front guide box, the connecting sleeve is movably and telescopically installed inside the guide sleeve, the hydraulic cylinder guide sleeve is embedded in one end of the guide sleeve and is sleeved on one end of the connecting sleeve, the front guide sleeve is fixedly installed on one end face of the connecting sleeve, the front copper sleeve is embedded in the same end of the connecting sleeve, the rear copper sleeve is embedded in the other end of the connecting sleeve, and the guide nut is threaded to the other end of the connecting sleeve and provides lateral limitation for the rear copper sleeve. The drill rod is movably embedded in the front guide sleeve, the front copper sleeve, the rear copper sleeve, and the guide nut in sequence. The front guide sleeve, the front copper sleeve, and the rear copper sleeve support and guide the drill rod to slide and telescopically within the connecting sleeve.

3. The telescopic guide drilling device according to claim 2, characterized in that: A partition ring is integrally formed on the circumference of the connecting sleeve, and a sealing ring is integrally formed inside the guide sleeve. A first annular cavity for accommodating hydraulic oil is formed between the end face of the hydraulic cylinder guide sleeve near the rear copper sleeve, the inner wall of one end of the guide sleeve, the sealing ring of the guide sleeve, and the outer wall of the connecting sleeve. The partition ring is located between the hydraulic cylinder guide sleeve and the sealing ring, and the partition ring divides the first annular cavity into an inwardly contracting hydraulic cavity and an outwardly extending hydraulic cavity.

4. The telescopic guide drilling device according to claim 3, characterized in that: The front guide box is provided with a first oil supply hole and a second oil supply hole, and the guide sleeve is provided with a third oil supply hole and a fourth oil supply hole. The first oil supply hole, the third oil supply hole and the extended oil pressure chamber are connected, and the second oil supply hole, the fourth oil supply hole and the retracted oil pressure chamber are connected.

5. A telescopic guide drilling device according to claim 4, characterized in that: A second annular cavity for containing coolant is formed between the inner wall of the other end of the guide sleeve, the sealing ring of the guide sleeve, and the outer wall of the connecting sleeve. A third annular cavity for containing coolant is formed between the front copper sleeve, the rear copper sleeve, the connecting sleeve, and the drill rod. A first coolant hole is also provided on the front guide box. A second coolant hole is also provided on the guide sleeve. A plurality of third coolant holes are provided on the connecting sleeve. The first coolant hole, the second coolant hole, the second annular cavity, the plurality of third coolant holes, and the third annular cavity are connected. A fourth coolant hole is provided at the bottom of the guide sleeve. The third annular cavity, the plurality of third coolant holes, and the fourth coolant hole are connected.

6. The telescopic guide drilling device according to claim 1, characterized in that: The first support assembly includes a guide bracket, a support bearing, and a support sleeve. The guide bracket is slidably mounted on the drill pipe moving assembly, the support bearing is embedded in the guide bracket, and the support sleeve is embedded in the support bearing and movably mounted on the drill pipe. The structure of the second support component is the same as that of the first support component.

7. A telescopic guide drilling device according to claim 1, characterized in that: The drilling mechanism includes a spindle box, a spindle, a connecting chuck, a sleeve, a rotary joint bearing, a synchronous belt drive assembly, and a drill rod rotation drive device. The spindle box is laterally slidably mounted on the drill rod moving assembly. The spindle is laterally mounted at the bottom of the spindle box. The connecting chuck is fixedly mounted on one end face of the spindle. The sleeve is embedded in the connecting chuck. One end of the drill rod is fixedly mounted in the connecting chuck through the sleeve. The rotary joint bearing is sleeved on the other end of the spindle. The drill rod rotation drive device is laterally mounted on the upper end of the spindle box. The drill rod rotation drive device is connected to the spindle via the synchronous belt drive assembly.

8. A telescopic guide drilling device according to claim 7, characterized in that: The drill rod has a first through hole along the axial direction, the center of the collet has a second through hole, the center of the connecting chuck has a third through hole, and the spindle has a fourth through hole along the axial direction. The first through hole, the second through hole, the third through hole, the fourth through hole and the center hole of the rotary joint bearing are connected.

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