Bendable drill bit structure for jade hollowing

Abstract

The utility model discloses a kind of flexible drill bit structures for jade hollowing, relate to jade processing equipment technical field, including carving table, the drill bit clamping transmission mechanism fixed in the top of carving table, flexible mechanism inserted in the inside of this mechanism and install hollowing drill bit in terminal. Drill bit clamping transmission mechanism inside is driven sliding plate and connecting rod assembly by pneumatic push rod, make the jaw of distribution of circumferential array rotate around main rotating shaft, to quickly clamp the axle core transmission end of flexible mechanism. Flexible mechanism utilizes flexible axle core and rotates transmission power in flexible sleeve, and the drill bit mounting shell of its end portion is provided with hexagonal hole with magnetic attraction fixed, for adsorbing and fixing hollowing drill bit. The utility model solves the problem that existing rigid spindle cannot be deep hole bending hollowing and the problem of complicated tool changing, with flexible operation, clamping stable, tool changing fast and dustproof durable effect.

Description

Technical Field

[0001] This utility model relates to the technical field of jade processing equipment, and in particular to a flexible drill bit structure for jade hollowing. Background Technology

[0002] Jade carving is a technical craft that demands a high degree of precision and operational flexibility. In particular, when performing complex openwork carving, it is often necessary to delve into the internal cavities of the jade material or to finely polish the curved inner walls.

[0003] However, existing tabletop jade carving equipment typically uses a fixed, rigid spindle as its power output, with the carving tools mounted directly on it. This structure limits the tool's working range, preventing it from penetrating deep into the jade's interior, particularly into hard-to-reach or winding passages, severely restricting the depth and complexity of openwork carving. Furthermore, changing tools to different sizes usually requires using wrenches or other tools to loosen the chuck nuts, a cumbersome and time-consuming process that fails to meet the demands for efficient processing.

[0004] Therefore, this utility model proposes a flexible drill bit structure for jade carving to overcome the shortcomings of the prior art. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a flexible drill bit structure for jade carving, aiming to improve the problems in the existing technology where jade carving equipment cannot perform deep hole bending and carving due to the use of a rigid spindle, and the traditional chuck tool changing operation is cumbersome, inefficient and cannot adapt to flexible transmission connections.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a flexible drill bit structure for jade carving, comprising: a carving table, a drill bit clamping and transmission mechanism, a flexible mechanism, and a carving drill bit, wherein the flexible mechanism is inserted and installed in the inner center of the drill bit clamping and transmission mechanism, and the carving drill bit is installed at the end of the flexible mechanism.

[0007] The drill bit clamping transmission mechanism is fixedly installed on the top of the engraving table;

[0008] The flexible mechanism includes a flexible sleeve, a handle, a drill bit mounting shell, a hexagonal hole, a shaft drive end, a flexible shaft, a dustproof sealing strip, and a magnetic fixation. The shaft drive end is used to insert into and be clamped inside the drill bit clamping transmission mechanism. One end of the flexible shaft is fixedly connected to the shaft drive end, and the other end is fixedly connected to the drill bit mounting shell. The flexible sleeve is rotatably sleeved on the outside of the flexible shaft. The handle is fixedly connected to the outside of the end of the flexible sleeve near the drill bit mounting shell. The dustproof sealing strip is disposed in the connection gap between the handle and the drill bit mounting shell. The hexagonal hole is opened on the end face of the drill bit mounting shell away from the flexible shaft. The magnetic fixation is fixedly installed at the bottom inside the hexagonal hole. The hollow drill bit is inserted into the inside of the hexagonal hole and is magnetically connected to the magnetic fixation.

[0009] Preferably, the drill bit clamping transmission mechanism includes a protective shell, a jaw, a clamping device shell, a limiting top plate, a main rotating shaft, a pneumatic push rod, a sliding plate, a connecting rod, a first rotating shaft, and a second rotating shaft. The protective shell is fixedly connected to the top of the engraving table. The clamping device shell is rotatably installed inside the protective shell. The pneumatic push rod is fixedly installed at the bottom of the inside of the clamping device shell. The sliding plate is fixedly connected to the output end of the pneumatic push rod. One end of the connecting rod is rotatably connected to the sliding plate via the second rotating shaft, and the other end is rotatably connected to the jaw via the first rotating shaft.

[0010] Preferably, the main rotating shaft is fixedly connected to the inner wall of the gripper housing, the gripper jaws are rotatably connected to the main rotating shaft, and the gripping end of the gripper jaws extends to the central area of ​​the gripper housing. The limiting top plate is fixedly installed on the top of the gripper housing, and the limiting top plate is provided with a guide groove for the gripper jaws to pass through.

[0011] Preferably, the protective housing has a clearance hole at the top center for the shaft drive end to pass through and enter the interior of the clamp housing.

[0012] Preferably, the outer peripheral surface of the sliding plate is slidably fitted with the inner wall of the clamp housing to provide axial movement guide support under the drive of the pneumatic push rod.

[0013] Preferably, the number of grippers is three, and the grippers are arranged in a circular array with the axis of the pneumatic push rod as the center. Each gripper is connected to a corresponding connecting rod for automatic centering and clamping.

[0014] Preferably, the surface of the grip is provided with an anti-slip texture to increase friction during hand operation and prevent slippage.

[0015] Preferably, the flexible sleeve adopts a multi-section nested structure to provide internal space protection while achieving flexible bending guidance.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, by setting a flexible mechanism, the problem that existing jade carving equipment usually uses a rigid spindle to directly fix the tool, which makes it impossible to flexibly penetrate into the complex curved surfaces or narrow spaces inside the jade for hollowing operations is solved. This achieves the effect of extending the power of the carving table flexibly, realizing multi-angle, deep and fine hollowing processing in handheld mode.

[0018] 2. This utility model solves the problem of cumbersome clamping and difficulty in automatic centering of mechanical chucks in the prior art by setting a pneumatic push rod driven linkage lever-type chuck structure in the drill bit clamping transmission mechanism. It achieves the effect of fast, stable and automatic centering and clamping of the flexible shaft core transmission end through pneumatic control, which significantly improves the efficiency and reliability of the power connection. Attached Figure Description

[0019] Figure 1 This is a perspective view of a flexible drill bit structure for jade carving proposed in this utility model.

[0020] Figure 2 An exploded view of a flexible drill bit structure for carving jade, as proposed in this utility model.

[0021] Figure 3 This is a cross-sectional schematic diagram of a flexible sleeve with a flexible drill bit structure for hollowing out jade, as proposed in this utility model.

[0022] Figure 4 This is a cross-sectional schematic diagram of a protective shell with a bendable drill bit structure for jade carving proposed in this utility model.

[0023] Figure 5 This is a cross-sectional schematic diagram of the outer shell of a clamping device for a flexible drill bit structure used for hollowing out jade, as proposed in this utility model.

[0024] Legend:

[0025] 1. Engraving table; 2. Hollow drill bit; 3. Flexible mechanism; 301. Flexible sleeve; 302. Handle; 303. Drill bit mounting shell; 304. Hexagonal hole; 305. Shaft core transmission end; 306. Flexible shaft core; 307. Dustproof sealing strip; 308. Magnetic fixation; 4. Drill bit clamping transmission mechanism; 401. Protective shell; 402. Clamping jaws; 403. Clamping device shell; 404. Limiting top plate; 405. Main shaft; 406. Pneumatic push rod; 407. Sliding plate; 408. Connecting rod; 409. First shaft; 410. Second shaft. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1-5 This utility model provides a flexible drill bit structure for jade carving, which aims to solve the technical problems of existing jade carving equipment that usually uses a rigid spindle to directly fix the tool, making it impossible to flexibly penetrate into the complex curved surfaces or narrow spaces inside the jade for carving operations. In addition, traditional mechanical chucks are cumbersome and inefficient when changing drill bits, making them difficult to adapt to the frequent tool changing requirements in jade processing.

[0028] The jade carving flexible drill bit structure is composed of a carving table 1, a drill bit clamping and transmission mechanism 4, a flexible mechanism 3, and a carving drill bit 2. The carving table 1 serves as the basic support platform for the entire device, and its interior typically integrates power sources such as a drive motor and a pneumatic control system. The drill bit clamping and transmission mechanism 4 is fixedly installed on the top plane of the carving table 1 by bolt connection or welding, serving as the central interface for power output and flexible connection. The flexible mechanism 3 is inserted into the center of the drill bit clamping and transmission mechanism 4, utilizing its ability to be bent and deform at will to guide the rotational power to the end. The carving drill bit 2 is detachably installed at the end of the flexible mechanism 3, allowing the operator to perform multi-angle and deep fine carving processing on the jade by holding the end of the flexible mechanism 3.

[0029] The flexible mechanism 3 includes a flexible shaft core 306 located at its core for transmitting torque. This flexible shaft core 306 is typically made of multiple layers of high-strength steel wire, possessing excellent torsional stiffness and bending flexibility. One end of the flexible shaft core 306 is fixedly connected to a shaft core drive end 305 via a press-fit connection. The shaft core drive end 305 is designed as a regular hexagonal or other polygonal metal cylinder structure to facilitate reliable clamping and torque bearing within the drive mechanism. The other end of the flexible shaft core 306 is fixedly connected to a drill bit mounting housing 303, which serves as the output component for directly driving the drill bit. A flexible sleeve 301 is rotatably fitted around the flexible shaft core 306. The flexible sleeve 301 does not rotate with the flexible shaft core 306 but instead provides external protection. The drill bit mounting housing 303 has a hexagonal hole 304 at the center of the end face away from the flexible shaft core 306, which serves to isolate high-speed rotating parts and provide hand support. A magnetic fixing 308 is fixedly installed at the bottom of the hexagonal hole 304 in the depth direction. The magnetic fixing 308 is made of a strong neodymium iron boron magnet. The tail of the hollow drill bit 2 is machined into a hexagonal prism shape that fits with the hexagonal hole 304. When the hollow drill bit 2 is inserted into the hexagonal hole 304, the magnetic force generated by the magnetic fixing 308 firmly attracts the hollow drill bit 2 to the bottom of the hole. The geometry of the hexagonal hole 304 restricts the circumferential rotation of the drill bit, thereby realizing the effective transmission of torque. This structure makes it possible to change the drill bit without the need for any auxiliary tools. It can be pulled out simply by overcoming the magnetic force, which greatly improves the efficiency of tool changing.

[0030] The drill bit clamping transmission mechanism 4 includes a protective housing 401 fixedly connected to the top of the engraving table 1. The protective housing 401 has a cover-like structure to shield the internal rotating parts and ensure operational safety. Inside the protective housing 401, a clamping housing 403 is rotatably mounted via a bearing assembly. The bottom of the clamping housing 403 is connected to the motor output shaft inside the engraving table 1, enabling high-speed rotation of the entire assembly. A miniaturized pneumatic push rod 406 is fixedly mounted at the bottom of the inside of the clamping housing 403. The piston rod output end extends vertically upward and is fixedly connected to a sliding plate 407. The sliding plate 407 is the active component of the linkage mechanism. Its top end is rotatably connected to one end of a connecting rod 408 via a second rotating shaft 410. The other end of the connecting rod 408 is rotatably connected to the lower drive arm of the gripper 402 via a first rotating shaft 409. The middle position of the gripper 402 is hinged and fixed to the inner wall support of the gripper housing 403 via a main rotating shaft 405, so that the gripper 402 can form a lever-type swing structure around the main rotating shaft 405.

[0031] Meanwhile, a limiting top plate 404 is fixedly installed at the top opening of the gripper housing 403 by screws. The limiting top plate 404 has a guide groove that matches the shape of the gripper 402. The upper gripping end of the gripper 402 passes through the guide groove and extends to the central area of ​​the gripper housing 403. When it is necessary to clamp the shaft core transmission end 305, the pneumatic push rod 406 is activated to retract, which drives the sliding plate 407 to move downward. The sliding plate 407 pulls the connecting rod 408 through the second rotating shaft 410. The connecting rod 408 pulls the lower end of the gripper 402 to swing outward or in a specific direction through the first rotating shaft 409. Due to the fulcrum effect of the main rotating shaft 405, the upper gripping end of the gripper 402 will retract towards the central axis. With the restriction of the guide groove of the limiting top plate 404, three or more grippers 402 work together to tightly lock the shaft core transmission end 305 inserted in the center, thereby transmitting the rotational motion of the gripper housing 403 to the flexible mechanism 3.

[0032] As a preferred embodiment, in order to ensure the centering accuracy and rotational balance during the clamping process, the number of grippers 402 is set to three. These three grippers 402 are evenly distributed in a circular array inside the clamping housing 403 with the central axis of the pneumatic push rod 406 as the axis of symmetry. Correspondingly, the connecting rod 408, the first rotating shaft 409 and the second rotating shaft 410 are also configured as three sets. The structure of the three-jaw linkage is similar to the principle of a three-jaw chuck, which can automatically center and ensure that the shaft core transmission end 305 will not experience eccentric vibration when rotating at high speed, thus ensuring the engraving accuracy.

[0033] As another preferred embodiment, in order to facilitate the quick and accurate insertion of the shaft drive end 305 into the clamping station, a clearance hole is provided at the top center of the protective housing 401. The diameter of the clearance hole is slightly larger than the outer circle diameter of the shaft drive end 305. The shaft drive end 305 passes through the clearance hole and enters the interior of the clamp housing 403. This design not only ensures the smoothness of insertion, but also maximizes the sealing of the top space of the protective housing 401 to prevent foreign objects from falling into the mechanism.

[0034] In a preferred embodiment, in order to improve the smoothness of the operation of the pneumatic transmission assembly, the outer peripheral surface of the sliding plate 407 is precision ground so that it forms a sliding fit with the inner cylindrical surface of the clamp housing 403. At this time, the inner wall of the clamp housing 403 acts as a guide rail for the sliding plate 407 to move up and down, preventing the sliding plate 407 from tilting laterally or getting stuck during the driving process of the pneumatic push rod 406, and ensuring the smoothness of the linkage mechanism.

[0035] As a preferred embodiment, in order to improve the comfort and controllability of handheld operation, the handle 302 is fixedly sleeved on the outside of one end of the flexible sleeve 301 near the drill bit mounting shell 303. The surface of the handle 302 is molded with knurled or striped anti-slip texture, which increases the coefficient of friction between the palm and the handle, so that the operator can firmly control the feed direction of the drill bit even when holding the carving for a long time or when the hands are sweaty.

[0036] As a preferred embodiment, in order to further protect the flexible sleeve structure and adapt to large-angle bending, the flexible sleeve 301 adopts a multi-section nested structure, that is, it is composed of multiple bamboo-like rigid plastic or metal rings nested together. This structure provides the necessary radial support force to protect the internal flexible core 306, while allowing a certain angle of relative deflection between adjacent segments, thereby giving the sleeve excellent flexible bending ability.

[0037] As a preferred embodiment, in order to prevent a large amount of dust generated during the jade carving process from entering the precision rotating parts, a dustproof sealing strip 307 is set at the connection gap between the front end face of the handle 302 and the rear end face of the drill bit mounting housing 303. The dustproof sealing strip 307 is usually made of felt ring or rubber lip seal ring. One side is fixedly bonded to the handle 302, and the other side slightly contacts the outer wall of the drill bit mounting housing 303. Without significantly increasing the rotational resistance, it forms an effective physical barrier to prevent dust particles from entering the mating gap between the flexible sleeve 301 and the drill bit mounting housing 303, which significantly extends the service life of the equipment.

[0038] Working principle: When hollowing out, the flexible mechanism 3 is used to install the hollowing drill bit 2 in the drill bit clamping transmission mechanism 4, and the motor torque inside the engraving table 1 is transmitted to the hollowing drill bit 2 to carry out the hollowing work.

[0039] First, place the shaft core drive end 305 into the opening of the protective shell 401 fixed on the top of the engraving table 1. Then, activate the pneumatic push rod 406 installed inside the clamp housing 403 to pull down the sliding plate 407 fixed at the output end. The connecting rod 408 is rotatably connected to the sliding plate 407 and the gripper 402 through the first rotating shaft 409 and the second rotating shaft 410 fixed at both ends. This converts the downward movement of the sliding plate 407 into the rotation of the gripper 402 around the main rotating shaft 405 fixed inside the clamp housing 403. The gripper 402 clamps the shaft core drive end 305 inward in the groove of the limiting top plate 404 on the top plate of the clamp housing 403.

[0040] After fixing, the internal motor rotates the shaft drive end 305 held by the clamp housing 403 and the jaws 402. The torque is transmitted to the drill bit mounting housing 303 at the other end through the flexible shaft 306 fixedly connected to one end of the shaft drive end 305. The hollow drill bit 2 is attracted by the magnetic fixing 308 and installed in the hexagonal hole 304 opened in the drill bit mounting housing 303 for rotation. The flexible sleeve 301 is sleeved on the flexible shaft 306 to provide guidance. The handle 302 at one end of the flexible sleeve 301 is easy to hold and prevents slippage. The dustproof sealing strip 307 is located at the gap between the flexible sleeve 301 and the drill bit mounting housing 303 to prevent dust from the hollowing grinding from entering.

Claims

1. A flexible drill bit structure for openwork jade, comprising: The engraving table (1), the drill bit clamping transmission mechanism (4), the bendable mechanism (3) and the hollow drill bit (2) are installed in the center of the drill bit clamping transmission mechanism (4), and the hollow drill bit (2) is installed at the end of the bendable mechanism (3). The feature is that the drill bit clamping transmission mechanism (4) is fixedly installed on the top of the engraving table (1); The flexible mechanism (3) includes a flexible sleeve (301), a handle (302), a drill bit mounting shell (303), a hexagonal hole (304), a shaft drive end (305), a flexible shaft (306), a dustproof sealing strip (307), and a magnetic fixing (308). The shaft drive end (305) is used to penetrate into the drill bit clamping transmission mechanism (4) and be clamped. One end of the flexible shaft (306) is fixedly connected to the shaft drive end (305), and the other end is fixedly connected to the drill bit mounting shell (303). The flexible sleeve (301) is rotatably sleeved on the outside of the flexible shaft (306). The handle (302) is fixedly connected to the outside of the flexible sleeve (301) near the drill bit mounting shell (303). The dustproof sealing strip (307) is disposed in the connection gap between the handle (302) and the drill bit mounting shell (303). The hexagonal hole (304) is opened on the end face of the drill bit mounting shell (303) away from the flexible shaft core (306). The magnetic fixing (308) is fixedly installed in the bottom of the hexagonal hole (304). The hollow drill bit (2) is inserted into the inside of the hexagonal hole (304) and is magnetically connected to the magnetic fixing (308).

2. The flexible drill bit structure for jade carving according to claim 1, characterized in that, The drill bit clamping transmission mechanism (4) includes a protective shell (401), a jaw (402), a clamping device shell (403), a limiting top plate (404), a main rotating shaft (405), a pneumatic push rod (406), a sliding plate (407), a connecting rod (408), a first rotating shaft (409), and a second rotating shaft (410). The protective shell (401) is fixedly connected to the top of the engraving table (1). The clamping device shell (403) is rotatably installed inside the protective shell (401). The pneumatic push rod (406) is fixedly installed at the bottom of the inside of the clamping device shell (403). The sliding plate (407) is fixedly connected to the output end of the pneumatic push rod (406). One end of the connecting rod (408) is rotatably connected to the sliding plate (407) through the second rotating shaft (410), and the other end is rotatably connected to the jaw (402) through the first rotating shaft (409).

3. The flexible drill bit structure for jade carving according to claim 2, characterized in that, The main rotating shaft (405) is fixedly connected to the inner wall of the clamp housing (403), the gripper (402) is rotatably connected to the main rotating shaft (405), and the gripping end of the gripper (402) extends to the central area of ​​the clamp housing (403). The limiting top plate (404) is fixedly installed on the top of the clamp housing (403), and the limiting top plate (404) has a guide groove for the gripper (402) to pass through.

4. The flexible drill bit structure for jade carving according to claim 2, characterized in that, The protective housing (401) has a clearance hole at the top center. The shaft drive end (305) passes through the clearance hole and enters the interior of the clamp housing (403) and is clamped by the jaws (402).

5. The flexible drill bit structure for jade carving according to claim 2, characterized in that, The outer peripheral surface of the sliding plate (407) slides against the inner wall of the clamp housing (403), and the sliding plate (407) reciprocates along the axial direction of the clamp housing (403) under the drive of the pneumatic push rod (406).

6. The flexible drill bit structure for jade carving according to claim 2, characterized in that, The number of grippers (402) is three. The grippers (402) are arranged in a circular array with the axis of the pneumatic push rod (406) as the center, and each gripper (402) is connected to a connecting rod (408).

7. The flexible drill bit structure for jade carving according to claim 1, characterized in that, The surface of the grip (302) is provided with an anti-slip texture to increase hand grip friction.

8. The flexible drill bit structure for jade carving according to claim 1, characterized in that, The flexible sleeve (301) adopts a multi-section nested structure to provide bending guidance and internal space protection.

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