Portable adjustable eccentric helical hole milling device and hole milling method

Abstract

The invention discloses a portable adjustable eccentric spiral hole milling device and a hole milling method.The portable adjustable eccentric spiral hole milling device is characterized in that a main shaft is sleeved with an inner sleeve, the two ends of the inner sleeve are sleeved with a first connecting ring and a second connecting ring respectively, and the outer side of the first connecting ring and the outer side of the second connecting ring are jointly sleeved with an outer sleeve; an outer damping mechanism is arranged on the outer side of the outer sleeve, a plurality of sets of inner damping mechanisms are evenly arranged on the side, close to the first connecting ring, of the second connecting ring in a circumferential array mode, the outer damping mechanism comprises a plurality of friction plates fixedly connected to the outer side of the outer sleeve in a sleeving mode, and each friction plate is rotationally connected with a friction rail. The outer side of the outer sleeve is further sleeved with a shell, an air bag is arranged between the interior of the shell and the friction rail, each set of internal damping mechanism comprises a knocking block fixedly arranged on the outer side of the inner sleeve, a sliding rail is formed in the second connecting ring, and the portable hole milling device solves the problem that when a current portable hole milling device works, vibration is extremely likely to be generated.

Description

Technical Field

[0001] The present invention belongs to the technical field of precision manufacturing, and particularly relates to a portable adjustable eccentric spiral hole milling device and a hole milling method. Background Art

[0002] With the continuous advancement of precision manufacturing technology, portable hole milling devices have become indispensable processing tools in scenarios such as narrow spaces and on-site operations due to their small size, flexibility, and portability. In the design process of traditional portable hole milling devices, in order to pursue higher portability, a lightweight design concept is often adopted. By selecting lightweight materials, optimizing the structural layout, etc., the overall weight of the device is effectively reduced, enabling operators to easily carry and operate, and greatly expanding its application scope. For example, it has played an important role in on-site repairs of aerospace vehicles and emergency processing on ship decks.

[0003] However, while this lightweight design brings convenience, it also gives rise to new problems. When the device performs high-speed milling operations, due to relatively low structural rigidity and mass, the device is extremely prone to vibration under the action of cutting forces. During high-speed milling, a large cutting force is generated between the tool and the workpiece, and the lightweight device structure cannot effectively resist the action of this force, resulting in a large vibration amplitude. This vibration will not only seriously affect the machining accuracy of hole milling, increasing the dimensional error and shape error of the hole, but also cause additional impact and wear on the tool, shortening the service life of the tool and increasing the processing cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable adjustable eccentric spiral hole milling device and a hole milling method for the existing device to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A portable adjustable eccentric spiral hole milling device and a hole milling method, including a main shaft, an inner sleeve is sleeved on the main shaft, a first connecting ring and a second connecting ring are respectively sleeved at both ends of the inner sleeve, an outer sleeve is sleeved on the outside of the first connecting ring and the second connecting ring, an external shock absorption mechanism is arranged on the outside of the outer sleeve, and a plurality of groups of internal shock absorption mechanisms are uniformly arranged in a circumferential array on one side of the second connecting ring close to the first connecting ring; The external shock-absorbing mechanism includes a plurality of friction plates fixedly sleeved on the outer side of the outer sleeve. A friction rail is rotatably fitted on the outer side of each friction plate. A housing is also sleeved on the outer side of the outer sleeve. An airbag is arranged between the inside of the housing and the friction rail. A sliding cavity is formed on one side of the friction rail. A sliding push rod is slidably arranged in the sliding cavity. A jacking block is arranged at one end of the sliding push rod away from the airbag. The sliding push rod and the jacking block are slidably fitted. A shock-absorbing block is fixedly arranged above the jacking block. The shock-absorbing block is embedded in the outer wall of the friction rail. Each group of the internal shock-absorbing mechanisms includes a knocking block fixedly arranged on the outer side of the inner sleeve. A slide rail is formed on the second connecting ring. A stress block is slidably arranged in the slide rail. The knocking block and the stress block are both provided with matching inclined surfaces, that is, when the knocking block rotates, it will jack up the stress block to slide in the slide rail. With the inner sleeve as the axis, the knocking block is located inside the stress block. Fixed blocks are arranged on both opposite sides of the stress block. A connecting component is connected between the stress block and each fixed block. A elastic block is arranged on the outer side of the stress block. The elastic block is fixedly arranged in the outer sleeve.

[0006] The present invention further explains that one end of the main shaft is connected with a cutter. A bearing is sleeved on one end of the outer sleeve close to the cutter. The outer side of the bearing is also connected with a housing. The main shaft, the inner sleeve, the outer sleeve, the external shock-absorbing mechanism and the internal shock-absorbing mechanism are all located inside the housing. One end of the main shaft and the cutter connected thereto extend outside the housing. And the housing and the shell are fixedly connected. The friction rail and the shell 323 are also fixedly connected. The inner sleeve and the outer sleeve are both externally connected with independent driving mechanisms. An eccentric adjusting mechanism is also integrated in the housing.

[0007] The present invention further explains that a dynamic balance mechanism is rotatably arranged between the inner sleeve and the outer sleeve. The dynamic balance mechanism includes a first slider rotatably connected to the inner side of the outer sleeve. One end of a first elastic rope is connected to one side of the first slider. The other end of the first elastic rope is connected to one side of a balance block. The other side of the balance block is connected to one end of a second elastic rope. The other end of the second elastic rope is connected with a second slider. The second slider is rotatably connected to the outer side of the inner sleeve. A liquid balance ring is sleeved on the outer side of the balance block. The inside of the liquid balance ring is a cavity with a trapezoidal cross-section. Three partition ribs are evenly arranged inside the liquid balance ring.

[0008] The present invention further illustrates that the connecting component includes an inner sliding rod, which is a combined cylinder structure composed of a flat large-diameter cylinder and a slender small-diameter cylinder. An outer sliding cylinder is slidably connected to the slender small-diameter cylinder of the inner sliding rod. The outer sliding cylinder is a combination of a flat large-diameter cylinder and a small-diameter barrel structure, and the slender small-diameter cylinder of the inner sliding rod and the small-diameter barrel structure of the outer sliding cylinder are slidably matched. A connecting spring is jointly connected between the flat large-diameter cylinder of the inner sliding rod and the flat large-diameter cylinder of the outer sliding cylinder. First hanging ears are fixedly arranged on both sides of the force-bearing block, and the first hanging ears are hinged to the inner sliding rod. A second hanging ear is fixedly arranged on one side of the fixed block, and the second hanging ear is hinged to the outer sliding cylinder.

[0009] The present invention further illustrates that the first connecting ring and the second connecting ring are fixedly arranged inside the outer sleeve.

[0010] The present invention further illustrates that a plurality of elastic coating layers are arranged on the housing, a honeycomb elastic member is laid on the outer side of the housing, and the outer side of the honeycomb elastic member is close to the inner side of the outer shell.

[0011] The present invention further illustrates that holding rings are fixedly installed on both opposite sides of the outer shell.

[0012] The present invention further illustrates a milling hole method for a portable adjustable eccentric spiral milling hole device, which is characterized by including: Starting the driving mechanism of the inner sleeve and the outer sleeve, so that the main shaft drives the cutter to start rotating, and adjusting the rotation speed according to preset parameters, and finely adjusting the eccentric position of the cutter through the eccentric adjustment mechanism to ensure that the cutter can perform eccentric milling holes along a predetermined trajectory during rotation, and at the same time the dynamic balance mechanism works under dynamic balance conditions; Specifically, during the eccentric milling hole operation, the eccentric movement of the cutter generates a centrifugal force, and the magnitude of this centrifugal force is related to the eccentricity e, the rotation speed n, and the mass m of the cutter. Its calculation formula , when the cutter performs eccentric milling holes, if the centrifugal force F increases or decreases due to changes in the eccentricity e, the rotation speed n, or the mass m of the cutter, the dynamic balance mechanism can make dynamic adjustments thereto, that is, the first slider and the second slider rotate in the inner sleeve and the outer sleeve, and the first elastic cord and the second elastic cord jointly connect the balance block. When rotating, the tensions of the first elastic cord and the second elastic cord both change, pulling the balance block to generate shaking or displacement, and offsetting the influence of the centrifugal force F generated by the eccentric movement of the cutter through the change in the position of the balance block.

[0013] The present invention is further described as follows. While eccentric milling of the hole is being performed, the external shock-absorbing mechanism and the internal shock-absorbing mechanism play shock-absorbing roles simultaneously. When the driving mechanism drives the outer sleeve to rotate, the friction plate rotates accordingly. While the friction plate rotates relative to the friction rail, friction occurs, and the shock-absorbing effect is achieved through the friction action. The heat generated by the relative friction between the two is transferred to the airbag, and the gas in the airbag gradually expands. The extrusion of the friction rail caused by the expansion of the airbag will further enhance the frictional force between the friction rail and the friction plate, thereby achieving the purpose of improving the friction shock-absorbing effect. When the inner sleeve rotates, the knocking block rotates accordingly. During the rotation process, the knocking block sequentially contacts a plurality of the force-receiving blocks on the outside in a circular motion trajectory and generates an upward jacking action. The force-receiving blocks slide outward in the slide rail, and the force-receiving blocks jack upward on the elastic block. Since the elastic block has elasticity, it can relieve the vibration. When the knocking block and the force-receiving block are relatively separated, due to the connection of the connecting component, the force-receiving blocks slide inward in the slide rail to the initial state.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, (1) By providing an external shock-absorbing mechanism and an internal shock-absorbing mechanism to work together, the vibration during the operation of the device is effectively reduced. The external shock-absorbing mechanism uses friction and the expansion of the airbag to enhance the frictional force to achieve shock absorption, and the internal shock-absorbing mechanism relieves the vibration through the cooperation of the knocking block and the force-receiving block and the buffering of the connecting component, ensuring the stable operation of the device. (2) By providing a dynamic balance mechanism, it can dynamically adjust the position of the balance block according to the change of the centrifugal force generated by eccentric milling of the hole through the cooperation of the slider, the elastic cord and the balance block, offset the influence of the centrifugal force, and ensure the stability and precision of the device during the eccentric milling operation. Description of the Drawings

[0015] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings: Figure 1 is the overall structural sectional view of the embodiment of the present invention; Figure 2 is the partial sectional view of the external shock-absorbing mechanism of the embodiment of the present invention; Figure 3 is the schematic view of the housing part of the embodiment of the present invention; Figure 4 is the schematic view of the honeycomb elastic member of the embodiment of the present invention; Figure 5 is the partial structural schematic view of the inner sleeve of the embodiment of the present invention; Figure 6 It is an enlarged schematic view of area A of an embodiment of the present invention; Figure 7 It is an enlarged schematic view of area B of an embodiment of the present invention; Figure 8 It is a partial cross-sectional view of the internal shock absorption mechanism of an embodiment of the present invention; Figure 9 It is a partial cross-sectional view of the connection component of an embodiment of the present invention; Figure 10 It is an enlarged schematic view of area C of an embodiment of the present invention; Figure 11 It is a partial cross-sectional view of the liquid balance ring of an embodiment of the present invention; In the figure: 1, main shaft; 2, inner sleeve; 21, dynamic balance mechanism; 211, first slider; 212, first elastic cord; 213, balance block; 2131, liquid balance ring; 2132, partition rib; 214, second elastic cord; 215, second slider; 22, internal shock absorption mechanism; 221, knocking block; 222, stress block; 2221, first hanging ear; 223, connection component; 2231, inner sliding rod; 2232, outer sliding cylinder; 2233, connection spring; 224, fixed block; 2241, second hanging ear; 225, elastic block; 3, outer sleeve; 31, first connecting ring; 32, external shock absorption mechanism; 321, friction plate; 322, friction rail; 3221, sliding cavity; 3222, sliding push rod; 3223, lifting block; 3224, shock absorption block; 323, housing; 3231, elastic coating; 3232, honeycomb elastic member; 324, airbag; 33, second connecting ring; 331, slide rail; 4, bearing; 5, outer shell; 6, hand-held ring; 7, cutter. Specific Embodiments

[0016] The following further describes the technical solution of the present invention in detail in conjunction with preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Refer to Figures 1 to 11 , an embodiment of the present invention provides a portable adjustable eccentric spiral hole milling device, as shown in Figure 1As shown in the figure, the portable adjustable eccentric spiral hole milling device and hole milling method include a main shaft 1, an inner sleeve 2 is sleeved on the main shaft 1, a first connecting ring 31 and a second connecting ring 33 are respectively sleeved at both ends of the inner sleeve 2, an outer sleeve 3 is sleeved outside the first connecting ring 31 and the second connecting ring 33, an external shock absorption mechanism 32 is arranged outside the outer sleeve 3, and a plurality of groups of internal shock absorption mechanisms 22 are evenly arranged in a circumferential array on one side of the second connecting ring 33 close to the first connecting ring 31.

[0018] As Figure 2 and Figure 10 shown in the figure, the external shock absorption mechanism 32 includes a plurality of friction plates 321 fixedly sleeved outside the outer sleeve 3, a friction rail 322 is rotatably connected to each friction plate 321, a housing 323 is also sleeved outside the outer sleeve 3, and an airbag 324 is arranged between the inside of the housing 323 and the friction rail 322. A sliding cavity 3221 is opened on one side of the friction rail 322, a sliding push rod 3222 is slidably arranged in the sliding cavity 3221, a jacking block 3223 is arranged at one end of the sliding push rod 3222 away from the airbag 324, the sliding push rod 3222 and the jacking block 3223 are slidably matched, and a shock absorption block 3224 is fixedly arranged above the jacking block 3223, and the shock absorption block 3224 is embedded in the outer wall of the friction rail 322.

[0019] When no external force acts, a certain contact pressure is maintained between the friction plate 321 and the friction rail 322, but no obvious relative movement occurs. When the outer sleeve 3 rotates, the friction plate 321 rotates accordingly. When the friction plate 321 rotates relative to the friction rail 322, friction occurs, so part of the vibration energy will be converted into frictional heat energy, thus achieving the shock absorption effect. The heat generated by the relative friction between the two is transmitted to the airbag 324, and the gas in the airbag 324 will gradually expand. The extrusion of the friction rail 322 caused by the expansion of the airbag 324 will further enhance the friction force between the friction rail 322 and the friction plate 321, so as to further improve the friction shock absorption effect.

[0020] When the airbag 324 expands, since the airbag 324 can conform to the direction of the internal pressure, the thrust generated by the expansion is accurately transmitted to the sliding push rod 3222 to push it towards the jacking block 3223. The sliding push rod 3222 and the jacking block 3223 adopt a structural design with a bevel surface fit. Specifically, the end of the sliding push rod 3222 is carefully processed to form a bevel surface with an accurate inclination angle, and the part of the jacking block 3223 in contact with the sliding push rod 3222 is also processed with a matching bevel surface. These two bevel surfaces are partially closely attached in the initial state but no relative movement has occurred yet.

[0021] As the sliding push rod 3222 slides linearly, relative movement begins between the two inclined surfaces. According to the mechanical principles of inclined plane friction and motion, when the sliding push rod 3222 moves along its axis, its inclined surface exerts a component force perpendicular to the inclined surface on the inclined surface of the jacking block 3223. This component force can be decomposed into two forces in two directions: one direction is parallel to the moving direction of the jacking block 3223, attempting to push the jacking block 3223 to move along its own track; the other direction is perpendicular to the mounting plane of the jacking block 3223, that is, the upward jacking direction. Since the jacking block 3223 is restricted in the vertical track and cannot move freely in the direction parallel to its track, the above-mentioned component force perpendicular to the mounting plane becomes the dominant acting force, prompting the jacking block 3223 to overcome gravity and possible minor frictional resistance, and move upward along the vertical direction to jack out the shock-absorbing block 3224 thereon. After being jacked out, the shock-absorbing block 3224 can fully exert its shock-absorbing effect, absorb shock energy through its own elastic deformation, and at the same time cooperate with the airbag 324 to form a buffer structure, further enhancing the shock-absorbing performance.

[0022] As Figure 7 and Figure 8 shown, each group of the internal shock-absorbing mechanisms 22 includes a knocking block 221 fixedly arranged outside the inner sleeve 2. A slide rail 331 is provided on the second connecting ring 33. A stress block 222 is slidably arranged in the slide rail 331. The knocking block 221 and the stress block 222 are both provided with mutually adapted inclined surfaces, that is, when the knocking block 221 rotates, it will jack up the stress block 222 to slide in the slide rail 331 (the principle of relative sliding of the cooperation of the two inclined surfaces is the same as the cooperation principle of the above-mentioned sliding push rod 3222 and the jacking block 3223). With the inner sleeve 2 as the axis, the knocking block 221 is located inside the stress block 222. Fixed blocks 224 are arranged on both opposite side surfaces of the stress block 222. A connecting component 223 is connected between the stress block 222 and each fixed block 224. An elastic block 225 is arranged outside the stress block 222, and the elastic block 225 is fixedly arranged in the outer sleeve 3.

[0023] When the inner sleeve 2 rotates, the knocking block 221 will rotate synchronously therewith. During the rotation process, the knocking block 221 sequentially contacts a plurality of the force-receiving blocks 222 on the outside along a circular motion trajectory, and the force-receiving blocks 222 generate a jacking effect. The force-receiving blocks 222 slide outward in the slide rail 331, and the force-receiving blocks 222 press upward against the elastic block 225. Since the elastic block 225 has elasticity, it can relieve vibration. The jacking of the force-receiving blocks 222 is a gradual process, and the vibration energy is gradually dispersed and transmitted during the inclined surface contact and relative sliding between the knocking block 221 and the force-receiving blocks 222. This progressive energy transmission method avoids the instantaneous concentration of energy on the elastic block 225, making the impact force borne by the elastic block 225 more uniform and gentle, thereby effectively extending the service life of the elastic block 225 and ensuring the durability and stability of the shock absorption effect.

[0024] Specifically, when the knocking block 221 rotates with the inner sleeve 2 and contacts the force-receiving block 222, the knocking block 221 exerts a component force along the inclined surface upward on the force-receiving block 222 , and at the same time, the force-receiving block 222 generates a reaction force on the knocking block 221 . According to Newton's third law, = . This component force along the inclined surface upward can be decomposed into a component force in the horizontal direction and a component force in the vertical direction . Among them, causes the force-receiving block 222 to slide upward in the slide rail 331, while will be balanced under the constraint of the slide rail 331. During the relative sliding of the inclined surfaces of the knocking block 221 and the force-receiving block 222, due to the existence of the inclined surface, the transmission of force has a certain buffering characteristic. As the knocking block 221 rotates, the contact position between it and the force-receiving block 222 changes continuously, and the angle of the inclined surface also causes the direction and magnitude of the force to change gradually, thereby realizing the gradual release and buffering of energy.

[0025] In some preferred embodiments, such as Figures 1 to 3As shown, one end of the main shaft 1 is connected with a tool 7. One end of the outer sleeve 3 close to the tool 7 is sleeved with a bearing 4, and a housing 5 is also connected to the outside of the bearing 4. The main shaft 1, the inner sleeve 2, the outer sleeve 3, the external damping mechanism 32 and the internal damping mechanism 22 are all located inside the housing 5. One end of the main shaft 1 and the tool 7 connected thereto extend outside the housing 5, and the housing 323 and the housing 5 are fixedly connected. The friction rail 322 and the housing 323 are also fixedly connected. Specifically, a connecting rod can be fixedly installed between the friction rail 322 and the housing 323, and an avoidance position for the housing 323 is provided on the airbag 324, while ensuring that the airbag 324 has good airtightness. The tool 7 is used to perform operations such as milling holes. The bearing 4 provides support for the relative rotation between the outer sleeve 3 and the housing 5, reduces friction and wear, and ensures the smooth operation of the device.

[0026] Both the inner sleeve 2 and the outer sleeve 3 are externally connected with independent driving mechanisms. These driving mechanisms can independently control the rotation and feeding movement of the inner sleeve 2 and the outer sleeve 3 respectively, providing diverse motion modes and power support for the device to adapt to different processing requirements. An eccentric adjustment mechanism is also integrated inside the housing 5. The eccentric adjustment mechanism can precisely adjust the eccentricity of the tool 7, thereby changing the cutting trajectory and cutting depth of the tool 7 during the processing, and realizing more precise processing control. The driving and eccentric adjustment mechanisms are both prior arts and will not be elaborated here.

[0027] In some preferred embodiments, such as Figure 1 , Figure 6 and and Figure 11 As shown, a dynamic balance mechanism 21 is rotatably arranged between the inner sleeve 2 and the outer sleeve 3. The dynamic balance mechanism 21 includes a first slider 211 rotatably connected to the inner side of the outer sleeve 3. One side of the first slider 211 is connected to one end of a first elastic rope 212. The other end of the first elastic rope 212 is connected to one side of a balance block 213. The other side of the balance block 213 is connected to one end of a second elastic rope 214. The other end of the second elastic rope 214 is connected to a second slider 215. The second slider 215 is rotatably connected to the outside of the inner sleeve 2. A liquid balance ring 2131 is sleeved outside the balance block 213. The internal cavity cross-section of the liquid balance ring 2131 is trapezoidal, and three partition ribs 2132 are evenly arranged inside the liquid balance ring 2131.

[0028] When performing eccentric milling hole operation, centrifugal force will be generated. This centrifugal force will be transmitted to the dynamic balance mechanism 21 through the inner sleeve 2 and the outer sleeve 3. The dynamic balance mechanism 21 can make dynamic adjustments to this, that is, the first slider 211 and the second slider 215 rotate within the inner sleeve 2 and the outer sleeve 3. The first elastic cord 212 and the second elastic cord 214 are commonly connected to the balance block 213. When rotating, the tensions of both the first elastic cord 212 and the second elastic cord 214 change, pulling the balance block 213 to generate shaking or displacement. The influence of the generated centrifugal force is offset by the change in the position of the balance block 213.

[0029] The interior of the liquid balance ring 2131 is divided into three independent cavities by the partition ribs 2132, and liquid is injected into each cavity, which is beneficial to suppressing liquid resonance, avoiding balance failure or instability phenomena caused by resonance. Also, through the synergistic effect of the three independent cavities, precise compensation for centrifugal force in multiple directions and angles is achieved. The interior of the liquid balance ring 2131 has a trapezoidal cross-section for the cavity, which is beneficial to reducing liquid eddy currents. When the balance block 213 makes a position adjustment under the pulling force of the elastic cord, the liquid in the liquid balance ring 2131 undergoes dynamic migration in its respective cavity according to the different centrifugal forces received by each cavity. The liquid migrations in the three cavities are interrelated and independent, and can accurately adjust the position and pressure distribution of the liquid in the annular cavity according to the actual centrifugal force distribution, thereby generating a balancing force equal in magnitude and opposite in direction to the centrifugal force. The overall movement of the liquid balance ring 2131 and the balance block 213 complements each other, enabling the entire dynamic balance mechanism 21 to more precisely offset centrifugal forces in different directions and of different magnitudes, significantly improving the balance accuracy and ensuring the stable operation of the inner sleeve 2 and the outer sleeve 3 during the eccentric milling hole operation.

[0030] In some preferred embodiments, such as Figure 8 and Figure 9As shown, the connecting component 223 includes an inner sliding rod 2231. The inner sliding rod 2231 is a combined cylinder structure composed of a flat large-diameter cylinder and a slender small-diameter cylinder. An outer sliding cylinder 2232 is slidably connected to the slender small-diameter cylinder of the inner sliding rod 2231. The outer sliding cylinder 2232 is a combination of a flat large-diameter cylinder and a small-diameter barrel structure, and the slender small-diameter cylinder of the inner sliding rod 2231 and the small-diameter barrel structure of the outer sliding cylinder 2232 are in sliding fit. A connecting spring 2233 is commonly connected between the flat large-diameter cylinder of the inner sliding rod 2231 and the flat large-diameter cylinder of the outer sliding cylinder 2232. Both sides of the force-bearing block 222 are fixedly provided with first hanging ears 2221, and the first hanging ears 2221 are hinged to the inner sliding rod 2231. One side of the fixed block 224 is fixedly provided with a second hanging ear 2241, and the second hanging ear 2241 is hinged to the outer sliding cylinder 2232.

[0031] While the force-bearing block 222 slides within the slide rail 331, the inner sliding rod 2231 and the outer sliding cylinder 2232 within the connecting component 223 slide relative to each other, and the connecting spring 2233 deforms to make an adaptive adjustment to ensure stable sliding. During this process, on the one hand, through its own elastic force, the connecting spring 2233 provides a certain buffer for the sliding of the force-bearing block 222, further reducing the vibration and unstable factors caused by the impact of the knocking block 221; on the other hand, its deformation recovery force can prompt the force-bearing block 222 to smoothly return to its initial position without external force after completing the jacking action, ensuring that the entire device can operate stably and orderly in a continuous knocking motion and guaranteeing the reliability and stability of the overall operation of the device.

[0032] In some preferred embodiments, as Figure 1 shown, the first connecting ring 31 and the second connecting ring 33 are fixedly arranged inside the outer sleeve 3.

[0033] In some preferred embodiments, as Figure 3 and Figure 4 shown, a plurality of elastic coating layers 3231 are arranged on the housing 323, a honeycomb elastic member 3232 is laid on the outer side of the housing 323, and the outer side of the honeycomb elastic member 3232 is close to the inner side of the outer shell 5. When the gas in the airbag 324 expands due to heat and the extrusion force on the friction rail 322 is too large, the airbag 324 squeezes the elastic coating layer 3231 to bulge outwards. With its unique honeycomb structure, the honeycomb elastic member 3232 can disperse and absorb the pressure transmitted from the elastic coating layer 3231, and at the same time effectively buffer and relieve vibration to ensure the stable operation of the device.

[0034] In some preferred embodiments, hand-held rings 6 are fixedly mounted on opposite sides of the outer shell 5, which is convenient for workers to perform hand-held operations.

[0035] In the above embodiment, the milling method of the portable adjustable eccentric spiral milling device is characterized by comprising: Start the driving mechanism of the inner sleeve 2 and the outer sleeve 3, so that the spindle 1 drives the tool 7 to start rotating, and adjust the rotation speed according to the preset parameters, and fine-tune the eccentric position of the tool 7 through the eccentric adjustment mechanism to ensure that the tool 7 can perform eccentric milling according to the predetermined trajectory during the rotation process, and at the same time, the dynamic balancing mechanism 21 performs dynamic balancing conditions for this; Specifically, while performing the eccentric milling operation, the eccentric motion of the tool 7 generates a centrifugal force, the magnitude of which is related to the eccentricity e, the rotation speed n or the angular velocity. And the tool 7 mass m, its calculation formula When the tool 7 performs eccentric milling, if the centrifugal force F increases or decreases due to changes in the eccentricity e, the rotation speed n or the mass m of the tool 7, the dynamic balancing mechanism 21 can make dynamic adjustments to this, that is, the first slider 211 and the second slider 215 rotate in the inner sleeve 2 and the outer sleeve 3, and the first elastic rope 212 and the second elastic rope 214 are connected to the balancing block 213, so that the tension of the first elastic rope 212 and the second elastic rope 214 changes during rotation, pulling the balancing block 213 to cause shaking or displacement, and the influence of the centrifugal force F generated by the eccentric movement of the tool 7 is offset by the change in position of the balancing block 213.

[0036] While the eccentric hole is being milled, the external shock absorbing mechanism 32 and the internal shock absorbing mechanism 22 simultaneously play a shock absorbing role; When the driving mechanism drives the outer sleeve 3 to rotate, the friction plate 321 rotates accordingly, and friction occurs when the friction plate 321 rotates relative to the friction rail 322, and a shock absorption effect is achieved through the friction effect. The heat generated by the relative friction between the two is transferred to the airbag 324, and the gas in the airbag 324 gradually expands. The expansion of the airbag 324 causes the friction rail 322 to be squeezed, which further enhances the friction between the friction rail 322 and the friction plate 321, thereby achieving the purpose of improving the friction shock absorption effect. When the inner sleeve 2 rotates, the knocking block 221 rotates accordingly. During the rotation, the knocking block 221 sequentially contacts a number of the outer stress blocks 222 along a circular motion trajectory and generates an upward jacking effect. The stress blocks 222 slide outward in the slide rail 331. The stress blocks 222 jack upward against the elastic block 225. Since the elastic block 225 is elastic, it can relieve vibration. When the knocking block 221 is relatively separated from the stress blocks 222, due to the connection of the connection assembly 223, the stress blocks 222 slide inward in the slide rail 331 to the initial state.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0038] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A portable adjustable eccentric spiral milling device, comprising a spindle, characterized in that: The main shaft is sleeved with an inner sleeve, and the two ends of the inner sleeve are sleeved with a first link and a second link respectively, and the outer sides of the first link and the second link are sleeved with an outer sleeve together, and the outer side of the outer sleeve is provided with an external shock absorbing mechanism, and a side of the second link close to the first link is evenly provided with a plurality of groups of internal shock absorbing mechanisms in a circumferential array; The external shock absorbing mechanism comprises a plurality of friction plates fixedly sleeved on the outside of the outer sleeve, each of the friction plates is rotatably matched with a friction rail on the outside, the outer sleeve is also sleeved with a shell, an air bag is arranged between the shell and the friction rail, a sliding cavity is opened on one side of the friction rail, a sliding push rod is slidably arranged in the sliding cavity, a lifting block is arranged at one end of the sliding push rod away from the air bag, the sliding push rod and the lifting block are slidably matched, a shock absorbing block is fixedly arranged above the lifting block, and the shock absorbing block is embedded in the outer wall of the friction rail; Each group of the internal shock absorbing mechanisms includes a knocking block fixedly arranged on the outside of the inner sleeve, a sliding rail is provided on the second link, a force-bearing block is slidably arranged in the sliding rail, and the knocking block and the force-bearing block are both provided with matching inclined surfaces, that is, when the knocking block rotates, the force-bearing block will be lifted up to slide in the sliding rail, with the inner sleeve as the axis, the knocking block is located on the inner side of the force-bearing block, fixed blocks are provided on both sides of the opposite sides of the force-bearing block, a connecting component is connected between the force-bearing block and each of the fixed blocks, an elastic block is provided on the outside of the force-bearing block, and the elastic block is fixedly arranged in the outer sleeve.

2. A portable adjustable eccentric spiral milling device according to claim 1, characterized in that: A tool is connected to one end of the main shaft, a bearing is sleeved on one end of the outer sleeve close to the tool, and an outer shell is also connected to the outer side of the bearing. The main shaft, the inner sleeve, the outer sleeve, the external shock-absorbing mechanism and the internal shock-absorbing mechanism are all located inside the outer shell, one end of the main shaft and the tool connected thereto extend outside the outer shell, and the shell and the shell are fixedly connected, the friction rail and the shell are also fixedly connected, the inner sleeve and the outer sleeve are both externally connected to independent driving mechanisms, and an eccentric adjustment mechanism is also integrated in the outer shell.

3. A portable adjustable eccentric spiral milling device according to claim 2, characterized in that: A dynamic balancing mechanism is rotatably arranged between the inner sleeve and the outer sleeve, and the dynamic balancing mechanism includes a first slider rotatably connected to the inner side of the outer sleeve, one side of the first slider is connected to one end of a first elastic rope, the other end of the first elastic rope is connected to one side of a balancing block, the other side of the balancing block is connected to one end of a second elastic rope, the other end of the second elastic rope is connected to a second slider, the second slider is rotatably connected to the outer side of the inner sleeve, a liquid balancing ring is sleeved on the outer side of the balancing block, the cavity cross-section of the liquid balancing ring is trapezoidal, and three dividing ribs are evenly arranged inside the liquid balancing ring.

4. A portable adjustable eccentric spiral milling device according to claim 3, characterized in that: The connecting assembly includes an inner sliding rod, which is a combined cylindrical structure composed of a flat large-diameter cylinder and a slender small-diameter cylinder. The slender small-diameter cylinder in the inner sliding rod is slidably connected to an outer sliding cylinder. The outer sliding cylinder is a combination of a flat large-diameter cylinder and a small-diameter barrel-shaped structure, and the slender small-diameter cylinder in the inner sliding rod and the small-diameter barrel-shaped structure in the outer sliding cylinder are slidably matched. A connecting spring is commonly connected between the flat large-diameter cylinder of the inner sliding rod and the flat large-diameter cylinder of the outer sliding cylinder. First hanging ears are fixedly provided on both sides of the force-bearing block, and the first hanging ear is hinged to the inner sliding rod. A second hanging ear is fixedly provided on one side of the fixed block, and the second hanging ear is hinged to the outer sliding cylinder.

5. A portable adjustable eccentric spiral milling device according to claim 4, characterized in that: The first link and the second link are fixedly arranged inside the outer sleeve.

6. A portable adjustable eccentric spiral milling device according to claim 5, characterized in that: The shell body is provided with a plurality of elastic coating layers, the outer side of the shell body is provided with a honeycomb elastic member, and the outer side of the honeycomb elastic member is close to the inner side of the outer shell.

7. A portable adjustable eccentric spiral milling device according to claim 6, characterized in that: Hand-holding rings are fixedly mounted on opposite sides of the outer shell.

8. A milling method according to any one of claims 1 to 7, characterized in that: include: The driving mechanisms of the inner sleeve and the outer sleeve are started, so that the spindle drives the tool to start rotating, and the rotation speed is adjusted according to preset parameters, and the eccentric position of the tool is finely adjusted by the eccentric adjustment mechanism to ensure that the tool can perform eccentric milling according to a predetermined trajectory during the rotation process, and at the same time, the dynamic balancing mechanism performs dynamic balancing conditions for this; Specifically, when performing eccentric milling, the eccentric motion of the tool will generate centrifugal force, the magnitude of which is related to the eccentricity e, the rotation speed n and the tool mass m, and its calculation formula is: When the tool performs eccentric milling, if the centrifugal force F increases or decreases due to changes in the eccentricity e, the rotation speed n or the tool mass m, the dynamic balancing mechanism can make dynamic adjustments to this, that is, the first slider and the second slider rotate in the inner sleeve and the outer sleeve, and the first elastic rope and the second elastic rope are respectively connected to the two ends of the balancing block, so that the tension of the first elastic rope and the second elastic rope changes during the rotation, pulling the balancing block to produce shaking or displacement, and the influence of the centrifugal force F generated by the eccentric movement of the tool is offset by the change in the position of the balancing block.

9. The method according to claim 8, characterized in that: While the eccentric hole is being milled, the external shock absorbing mechanism and the internal shock absorbing mechanism simultaneously play a shock absorbing role; When the driving mechanism drives the outer sleeve to rotate, the friction plate rotates accordingly, and friction occurs when the friction plate rotates relative to the friction rail, and a shock absorption effect is achieved through the friction effect. The heat generated by the relative friction between the two is transferred to the airbag, and the gas in the airbag gradually expands. The expansion of the airbag causes the friction rail to be squeezed, which further enhances the friction between the friction rail and the friction plate, thereby achieving the purpose of improving the friction shock absorption effect; When the inner sleeve rotates, the knocking block rotates accordingly. During the rotation process, the knocking block contacts the several force-bearing blocks on the outside in turn according to the circular motion trajectory, and produces an upward lifting effect. The force-bearing block slides outward in the slide rail, and the force-bearing block presses upward on the elastic block. Since the elastic block is elastic, it can relieve vibration. When the knocking block is relatively separated from the force-bearing block, due to the connecting action of the connecting assembly, the force-bearing block slides inward in the slide rail to the initial state.

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